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freebsd-skq/sys/dev/e1000/if_em.c
Sean Bruno 23c9098b2a Change EM_MULTIQUEUE to a real kernconf entry and enable support for 
up to 2 rx/tx queues for the 82574.

Program the 82574 to enable 5 msix vectors, assign 1 to each rx queue,
1 to each tx queue and 1 to the link handler.

Inspired by DragonFlyBSD, enable some RSS logic for handling tx queue
handling/processing.

Move multiqueue handler functions so that they line up better in a diff
review to if_igb.c

Always enqueue tx work to be done in em_mq_start, if unable to acquire
the TX lock, then this will be processed in the background later by the
taskqueue.  Remove mbuf argument from em_start_mq_locked() as the work
is always enqueued.  (stolen from igb)

Setup TARC, TXDCTL and RXDCTL registers for better performance and stability
in multiqueue and singlequeue implementations. Handle Intel errata  3 and
generic multiqueue behavior with the initialization of TARC(0) and TARC(1)

Bind interrupt threads to cpus in order.  (stolen from igb)

Add 2 new DDB functions, one to display the queue(s) and their settings and
one to reset the adapter.  Primarily used for debugging.

In the multiqueue configuration, bump RXD and TXD ring size to max for the
adapter (4096).  Setup an RDTR of 64 and an RADV of 128 in multiqueue configuration
to cut down on the number of interrupts.  RADV was arbitrarily set to 2x RDTR
and can be adjusted as needed.

Cleanup the display in top a bit to make it clearer where the taskqueue threads
are running and what they should be doing.

Ensure that both queues are processed by em_local_timer() by writing them both
to the IMS register to generate soft interrupts.

Ensure that an soft interrupt is generated when em_msix_link() is run so that
any races between assertion of the link/status interrupt and a rx/tx interrupt
are handled.

Document existing tuneables: hw.em.eee_setting, hw.em.msix, hw.em.smart_pwr_down, hw.em.sbp

Document use of hw.em.num_queues and the new kernel option EM_MULTIQUEUE

Thanks to Intel for their continued support of FreeBSD.

Reviewed by:	erj jfv hiren gnn wblock
Obtained from:	Intel Corporation
MFC after:	2 weeks
Relnotes:	Yes
Sponsored by:	Limelight Networks
Differential Revision:	https://reviews.freebsd.org/D1994
2015-06-03 18:01:09 +00:00

6019 lines
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/******************************************************************************
Copyright (c) 2001-2015, Intel Corporation
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. Neither the name of the Intel Corporation nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
******************************************************************************/
/*$FreeBSD$*/
#include "opt_em.h"
#include "opt_ddb.h"
#include "opt_inet.h"
#include "opt_inet6.h"
#ifdef HAVE_KERNEL_OPTION_HEADERS
#include "opt_device_polling.h"
#endif
#include <sys/param.h>
#include <sys/systm.h>
#ifdef DDB
#include <sys/types.h>
#include <ddb/ddb.h>
#endif
#if __FreeBSD_version >= 800000
#include <sys/buf_ring.h>
#endif
#include <sys/bus.h>
#include <sys/endian.h>
#include <sys/kernel.h>
#include <sys/kthread.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/module.h>
#include <sys/rman.h>
#include <sys/smp.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/sysctl.h>
#include <sys/taskqueue.h>
#include <sys/eventhandler.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <net/bpf.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_arp.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_types.h>
#include <net/if_vlan_var.h>
#include <netinet/in_systm.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <netinet/ip.h>
#include <netinet/ip6.h>
#include <netinet/tcp.h>
#include <netinet/udp.h>
#include <machine/in_cksum.h>
#include <dev/led/led.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include "e1000_api.h"
#include "e1000_82571.h"
#include "if_em.h"
/*********************************************************************
* Set this to one to display debug statistics
*********************************************************************/
int em_display_debug_stats = 0;
/*********************************************************************
* Driver version:
*********************************************************************/
char em_driver_version[] = "7.4.2";
/*********************************************************************
* PCI Device ID Table
*
* Used by probe to select devices to load on
* Last field stores an index into e1000_strings
* Last entry must be all 0s
*
* { Vendor ID, Device ID, SubVendor ID, SubDevice ID, String Index }
*********************************************************************/
static em_vendor_info_t em_vendor_info_array[] =
{
/* Intel(R) PRO/1000 Network Connection */
{ 0x8086, E1000_DEV_ID_82571EB_COPPER, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_82571EB_FIBER, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_82571EB_SERDES, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_82571EB_SERDES_DUAL,
PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_82571EB_SERDES_QUAD,
PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_82571EB_QUAD_COPPER,
PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_82571EB_QUAD_COPPER_LP,
PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_82571EB_QUAD_FIBER,
PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_82571PT_QUAD_COPPER,
PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_82572EI_COPPER, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_82572EI_FIBER, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_82572EI_SERDES, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_82572EI, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_82573E, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_82573E_IAMT, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_82573L, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_82583V, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_80003ES2LAN_COPPER_SPT,
PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_80003ES2LAN_SERDES_SPT,
PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_80003ES2LAN_COPPER_DPT,
PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_80003ES2LAN_SERDES_DPT,
PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_ICH8_IGP_M_AMT, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_ICH8_IGP_AMT, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_ICH8_IGP_C, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_ICH8_IFE, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_ICH8_IFE_GT, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_ICH8_IFE_G, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_ICH8_IGP_M, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_ICH8_82567V_3, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_ICH9_IGP_M_AMT, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_ICH9_IGP_AMT, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_ICH9_IGP_C, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_ICH9_IGP_M, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_ICH9_IGP_M_V, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_ICH9_IFE, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_ICH9_IFE_GT, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_ICH9_IFE_G, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_ICH9_BM, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_82574L, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_82574LA, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_ICH10_R_BM_LM, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_ICH10_R_BM_LF, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_ICH10_R_BM_V, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_ICH10_D_BM_LM, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_ICH10_D_BM_LF, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_ICH10_D_BM_V, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_PCH_M_HV_LM, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_PCH_M_HV_LC, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_PCH_D_HV_DM, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_PCH_D_HV_DC, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_PCH2_LV_LM, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_PCH2_LV_V, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_PCH_LPT_I217_LM, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_PCH_LPT_I217_V, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_PCH_LPTLP_I218_LM,
PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_PCH_LPTLP_I218_V,
PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_PCH_I218_LM2, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_PCH_I218_V2, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_PCH_I218_LM3, PCI_ANY_ID, PCI_ANY_ID, 0},
{ 0x8086, E1000_DEV_ID_PCH_I218_V3, PCI_ANY_ID, PCI_ANY_ID, 0},
/* required last entry */
{ 0, 0, 0, 0, 0}
};
/*********************************************************************
* Table of branding strings for all supported NICs.
*********************************************************************/
static char *em_strings[] = {
"Intel(R) PRO/1000 Network Connection"
};
/*********************************************************************
* Function prototypes
*********************************************************************/
static int em_probe(device_t);
static int em_attach(device_t);
static int em_detach(device_t);
static int em_shutdown(device_t);
static int em_suspend(device_t);
static int em_resume(device_t);
#ifdef EM_MULTIQUEUE
static int em_mq_start(if_t, struct mbuf *);
static int em_mq_start_locked(if_t,
struct tx_ring *);
static void em_qflush(if_t);
#else
static void em_start(if_t);
static void em_start_locked(if_t, struct tx_ring *);
#endif
static int em_ioctl(if_t, u_long, caddr_t);
static uint64_t em_get_counter(if_t, ift_counter);
static void em_init(void *);
static void em_init_locked(struct adapter *);
static void em_stop(void *);
static void em_media_status(if_t, struct ifmediareq *);
static int em_media_change(if_t);
static void em_identify_hardware(struct adapter *);
static int em_allocate_pci_resources(struct adapter *);
static int em_allocate_legacy(struct adapter *);
static int em_allocate_msix(struct adapter *);
static int em_allocate_queues(struct adapter *);
static int em_setup_msix(struct adapter *);
static void em_free_pci_resources(struct adapter *);
static void em_local_timer(void *);
static void em_reset(struct adapter *);
static int em_setup_interface(device_t, struct adapter *);
static void em_setup_transmit_structures(struct adapter *);
static void em_initialize_transmit_unit(struct adapter *);
static int em_allocate_transmit_buffers(struct tx_ring *);
static void em_free_transmit_structures(struct adapter *);
static void em_free_transmit_buffers(struct tx_ring *);
static int em_setup_receive_structures(struct adapter *);
static int em_allocate_receive_buffers(struct rx_ring *);
static void em_initialize_receive_unit(struct adapter *);
static void em_free_receive_structures(struct adapter *);
static void em_free_receive_buffers(struct rx_ring *);
static void em_enable_intr(struct adapter *);
static void em_disable_intr(struct adapter *);
static void em_update_stats_counters(struct adapter *);
static void em_add_hw_stats(struct adapter *adapter);
static void em_txeof(struct tx_ring *);
static bool em_rxeof(struct rx_ring *, int, int *);
#ifndef __NO_STRICT_ALIGNMENT
static int em_fixup_rx(struct rx_ring *);
#endif
static void em_receive_checksum(struct e1000_rx_desc *, struct mbuf *);
static void em_transmit_checksum_setup(struct tx_ring *, struct mbuf *, int,
struct ip *, u32 *, u32 *);
static void em_tso_setup(struct tx_ring *, struct mbuf *, int, struct ip *,
struct tcphdr *, u32 *, u32 *);
static void em_set_promisc(struct adapter *);
static void em_disable_promisc(struct adapter *);
static void em_set_multi(struct adapter *);
static void em_update_link_status(struct adapter *);
static void em_refresh_mbufs(struct rx_ring *, int);
static void em_register_vlan(void *, if_t, u16);
static void em_unregister_vlan(void *, if_t, u16);
static void em_setup_vlan_hw_support(struct adapter *);
static int em_xmit(struct tx_ring *, struct mbuf **);
static int em_dma_malloc(struct adapter *, bus_size_t,
struct em_dma_alloc *, int);
static void em_dma_free(struct adapter *, struct em_dma_alloc *);
static int em_sysctl_nvm_info(SYSCTL_HANDLER_ARGS);
static void em_print_nvm_info(struct adapter *);
static int em_sysctl_debug_info(SYSCTL_HANDLER_ARGS);
static void em_print_debug_info(struct adapter *);
static int em_is_valid_ether_addr(u8 *);
static int em_sysctl_int_delay(SYSCTL_HANDLER_ARGS);
static void em_add_int_delay_sysctl(struct adapter *, const char *,
const char *, struct em_int_delay_info *, int, int);
/* Management and WOL Support */
static void em_init_manageability(struct adapter *);
static void em_release_manageability(struct adapter *);
static void em_get_hw_control(struct adapter *);
static void em_release_hw_control(struct adapter *);
static void em_get_wakeup(device_t);
static void em_enable_wakeup(device_t);
static int em_enable_phy_wakeup(struct adapter *);
static void em_led_func(void *, int);
static void em_disable_aspm(struct adapter *);
static int em_irq_fast(void *);
/* MSIX handlers */
static void em_msix_tx(void *);
static void em_msix_rx(void *);
static void em_msix_link(void *);
static void em_handle_tx(void *context, int pending);
static void em_handle_rx(void *context, int pending);
static void em_handle_link(void *context, int pending);
#ifdef EM_MULTIQUEUE
static void em_enable_vectors_82574(struct adapter *);
#endif
static void em_set_sysctl_value(struct adapter *, const char *,
const char *, int *, int);
static int em_set_flowcntl(SYSCTL_HANDLER_ARGS);
static int em_sysctl_eee(SYSCTL_HANDLER_ARGS);
static __inline void em_rx_discard(struct rx_ring *, int);
#ifdef DEVICE_POLLING
static poll_handler_t em_poll;
#endif /* POLLING */
/*********************************************************************
* FreeBSD Device Interface Entry Points
*********************************************************************/
static device_method_t em_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, em_probe),
DEVMETHOD(device_attach, em_attach),
DEVMETHOD(device_detach, em_detach),
DEVMETHOD(device_shutdown, em_shutdown),
DEVMETHOD(device_suspend, em_suspend),
DEVMETHOD(device_resume, em_resume),
DEVMETHOD_END
};
static driver_t em_driver = {
"em", em_methods, sizeof(struct adapter),
};
devclass_t em_devclass;
DRIVER_MODULE(em, pci, em_driver, em_devclass, 0, 0);
MODULE_DEPEND(em, pci, 1, 1, 1);
MODULE_DEPEND(em, ether, 1, 1, 1);
/*********************************************************************
* Tunable default values.
*********************************************************************/
#define EM_TICKS_TO_USECS(ticks) ((1024 * (ticks) + 500) / 1000)
#define EM_USECS_TO_TICKS(usecs) ((1000 * (usecs) + 512) / 1024)
#define M_TSO_LEN 66
#define MAX_INTS_PER_SEC 8000
#define DEFAULT_ITR (1000000000/(MAX_INTS_PER_SEC * 256))
/* Allow common code without TSO */
#ifndef CSUM_TSO
#define CSUM_TSO 0
#endif
static SYSCTL_NODE(_hw, OID_AUTO, em, CTLFLAG_RD, 0, "EM driver parameters");
static int em_tx_int_delay_dflt = EM_TICKS_TO_USECS(EM_TIDV);
static int em_rx_int_delay_dflt = EM_TICKS_TO_USECS(EM_RDTR);
SYSCTL_INT(_hw_em, OID_AUTO, tx_int_delay, CTLFLAG_RDTUN, &em_tx_int_delay_dflt,
0, "Default transmit interrupt delay in usecs");
SYSCTL_INT(_hw_em, OID_AUTO, rx_int_delay, CTLFLAG_RDTUN, &em_rx_int_delay_dflt,
0, "Default receive interrupt delay in usecs");
static int em_tx_abs_int_delay_dflt = EM_TICKS_TO_USECS(EM_TADV);
static int em_rx_abs_int_delay_dflt = EM_TICKS_TO_USECS(EM_RADV);
SYSCTL_INT(_hw_em, OID_AUTO, tx_abs_int_delay, CTLFLAG_RDTUN,
&em_tx_abs_int_delay_dflt, 0,
"Default transmit interrupt delay limit in usecs");
SYSCTL_INT(_hw_em, OID_AUTO, rx_abs_int_delay, CTLFLAG_RDTUN,
&em_rx_abs_int_delay_dflt, 0,
"Default receive interrupt delay limit in usecs");
static int em_rxd = EM_DEFAULT_RXD;
static int em_txd = EM_DEFAULT_TXD;
SYSCTL_INT(_hw_em, OID_AUTO, rxd, CTLFLAG_RDTUN, &em_rxd, 0,
"Number of receive descriptors per queue");
SYSCTL_INT(_hw_em, OID_AUTO, txd, CTLFLAG_RDTUN, &em_txd, 0,
"Number of transmit descriptors per queue");
static int em_smart_pwr_down = FALSE;
SYSCTL_INT(_hw_em, OID_AUTO, smart_pwr_down, CTLFLAG_RDTUN, &em_smart_pwr_down,
0, "Set to true to leave smart power down enabled on newer adapters");
/* Controls whether promiscuous also shows bad packets */
static int em_debug_sbp = FALSE;
SYSCTL_INT(_hw_em, OID_AUTO, sbp, CTLFLAG_RDTUN, &em_debug_sbp, 0,
"Show bad packets in promiscuous mode");
static int em_enable_msix = TRUE;
SYSCTL_INT(_hw_em, OID_AUTO, enable_msix, CTLFLAG_RDTUN, &em_enable_msix, 0,
"Enable MSI-X interrupts");
#ifdef EM_MULTIQUEUE
static int em_num_queues = 1;
SYSCTL_INT(_hw_em, OID_AUTO, num_queues, CTLFLAG_RDTUN, &em_num_queues, 0,
"82574 only: Number of queues to configure, 0 indicates autoconfigure");
#endif
/*
** Global variable to store last used CPU when binding queues
** to CPUs in igb_allocate_msix. Starts at CPU_FIRST and increments when a
** queue is bound to a cpu.
*/
static int em_last_bind_cpu = -1;
/* How many packets rxeof tries to clean at a time */
static int em_rx_process_limit = 100;
SYSCTL_INT(_hw_em, OID_AUTO, rx_process_limit, CTLFLAG_RDTUN,
&em_rx_process_limit, 0,
"Maximum number of received packets to process "
"at a time, -1 means unlimited");
/* Energy efficient ethernet - default to OFF */
static int eee_setting = 1;
SYSCTL_INT(_hw_em, OID_AUTO, eee_setting, CTLFLAG_RDTUN, &eee_setting, 0,
"Enable Energy Efficient Ethernet");
/* Global used in WOL setup with multiport cards */
static int global_quad_port_a = 0;
#ifdef DEV_NETMAP /* see ixgbe.c for details */
#include <dev/netmap/if_em_netmap.h>
#endif /* DEV_NETMAP */
/*********************************************************************
* Device identification routine
*
* em_probe determines if the driver should be loaded on
* adapter based on PCI vendor/device id of the adapter.
*
* return BUS_PROBE_DEFAULT on success, positive on failure
*********************************************************************/
static int
em_probe(device_t dev)
{
char adapter_name[60];
uint16_t pci_vendor_id = 0;
uint16_t pci_device_id = 0;
uint16_t pci_subvendor_id = 0;
uint16_t pci_subdevice_id = 0;
em_vendor_info_t *ent;
INIT_DEBUGOUT("em_probe: begin");
pci_vendor_id = pci_get_vendor(dev);
if (pci_vendor_id != EM_VENDOR_ID)
return (ENXIO);
pci_device_id = pci_get_device(dev);
pci_subvendor_id = pci_get_subvendor(dev);
pci_subdevice_id = pci_get_subdevice(dev);
ent = em_vendor_info_array;
while (ent->vendor_id != 0) {
if ((pci_vendor_id == ent->vendor_id) &&
(pci_device_id == ent->device_id) &&
((pci_subvendor_id == ent->subvendor_id) ||
(ent->subvendor_id == PCI_ANY_ID)) &&
((pci_subdevice_id == ent->subdevice_id) ||
(ent->subdevice_id == PCI_ANY_ID))) {
sprintf(adapter_name, "%s %s",
em_strings[ent->index],
em_driver_version);
device_set_desc_copy(dev, adapter_name);
return (BUS_PROBE_DEFAULT);
}
ent++;
}
return (ENXIO);
}
/*********************************************************************
* Device initialization routine
*
* The attach entry point is called when the driver is being loaded.
* This routine identifies the type of hardware, allocates all resources
* and initializes the hardware.
*
* return 0 on success, positive on failure
*********************************************************************/
static int
em_attach(device_t dev)
{
struct adapter *adapter;
struct e1000_hw *hw;
int error = 0;
INIT_DEBUGOUT("em_attach: begin");
if (resource_disabled("em", device_get_unit(dev))) {
device_printf(dev, "Disabled by device hint\n");
return (ENXIO);
}
adapter = device_get_softc(dev);
adapter->dev = adapter->osdep.dev = dev;
hw = &adapter->hw;
EM_CORE_LOCK_INIT(adapter, device_get_nameunit(dev));
/* SYSCTL stuff */
SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
OID_AUTO, "nvm", CTLTYPE_INT|CTLFLAG_RW, adapter, 0,
em_sysctl_nvm_info, "I", "NVM Information");
SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
OID_AUTO, "debug", CTLTYPE_INT|CTLFLAG_RW, adapter, 0,
em_sysctl_debug_info, "I", "Debug Information");
SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
OID_AUTO, "fc", CTLTYPE_INT|CTLFLAG_RW, adapter, 0,
em_set_flowcntl, "I", "Flow Control");
callout_init_mtx(&adapter->timer, &adapter->core_mtx, 0);
/* Determine hardware and mac info */
em_identify_hardware(adapter);
/* Setup PCI resources */
if (em_allocate_pci_resources(adapter)) {
device_printf(dev, "Allocation of PCI resources failed\n");
error = ENXIO;
goto err_pci;
}
/*
** For ICH8 and family we need to
** map the flash memory, and this
** must happen after the MAC is
** identified
*/
if ((hw->mac.type == e1000_ich8lan) ||
(hw->mac.type == e1000_ich9lan) ||
(hw->mac.type == e1000_ich10lan) ||
(hw->mac.type == e1000_pchlan) ||
(hw->mac.type == e1000_pch2lan) ||
(hw->mac.type == e1000_pch_lpt)) {
int rid = EM_BAR_TYPE_FLASH;
adapter->flash = bus_alloc_resource_any(dev,
SYS_RES_MEMORY, &rid, RF_ACTIVE);
if (adapter->flash == NULL) {
device_printf(dev, "Mapping of Flash failed\n");
error = ENXIO;
goto err_pci;
}
/* This is used in the shared code */
hw->flash_address = (u8 *)adapter->flash;
adapter->osdep.flash_bus_space_tag =
rman_get_bustag(adapter->flash);
adapter->osdep.flash_bus_space_handle =
rman_get_bushandle(adapter->flash);
}
/* Do Shared Code initialization */
if (e1000_setup_init_funcs(hw, TRUE)) {
device_printf(dev, "Setup of Shared code failed\n");
error = ENXIO;
goto err_pci;
}
/*
* Setup MSI/X or MSI if PCI Express
*/
adapter->msix = em_setup_msix(adapter);
e1000_get_bus_info(hw);
/* Set up some sysctls for the tunable interrupt delays */
em_add_int_delay_sysctl(adapter, "rx_int_delay",
"receive interrupt delay in usecs", &adapter->rx_int_delay,
E1000_REGISTER(hw, E1000_RDTR), em_rx_int_delay_dflt);
em_add_int_delay_sysctl(adapter, "tx_int_delay",
"transmit interrupt delay in usecs", &adapter->tx_int_delay,
E1000_REGISTER(hw, E1000_TIDV), em_tx_int_delay_dflt);
em_add_int_delay_sysctl(adapter, "rx_abs_int_delay",
"receive interrupt delay limit in usecs",
&adapter->rx_abs_int_delay,
E1000_REGISTER(hw, E1000_RADV),
em_rx_abs_int_delay_dflt);
em_add_int_delay_sysctl(adapter, "tx_abs_int_delay",
"transmit interrupt delay limit in usecs",
&adapter->tx_abs_int_delay,
E1000_REGISTER(hw, E1000_TADV),
em_tx_abs_int_delay_dflt);
em_add_int_delay_sysctl(adapter, "itr",
"interrupt delay limit in usecs/4",
&adapter->tx_itr,
E1000_REGISTER(hw, E1000_ITR),
DEFAULT_ITR);
/* Sysctl for limiting the amount of work done in the taskqueue */
em_set_sysctl_value(adapter, "rx_processing_limit",
"max number of rx packets to process", &adapter->rx_process_limit,
em_rx_process_limit);
/*
* Validate number of transmit and receive descriptors. It
* must not exceed hardware maximum, and must be multiple
* of E1000_DBA_ALIGN.
*/
if (((em_txd * sizeof(struct e1000_tx_desc)) % EM_DBA_ALIGN) != 0 ||
(em_txd > EM_MAX_TXD) || (em_txd < EM_MIN_TXD)) {
device_printf(dev, "Using %d TX descriptors instead of %d!\n",
EM_DEFAULT_TXD, em_txd);
adapter->num_tx_desc = EM_DEFAULT_TXD;
} else
adapter->num_tx_desc = em_txd;
if (((em_rxd * sizeof(struct e1000_rx_desc)) % EM_DBA_ALIGN) != 0 ||
(em_rxd > EM_MAX_RXD) || (em_rxd < EM_MIN_RXD)) {
device_printf(dev, "Using %d RX descriptors instead of %d!\n",
EM_DEFAULT_RXD, em_rxd);
adapter->num_rx_desc = EM_DEFAULT_RXD;
} else
adapter->num_rx_desc = em_rxd;
hw->mac.autoneg = DO_AUTO_NEG;
hw->phy.autoneg_wait_to_complete = FALSE;
hw->phy.autoneg_advertised = AUTONEG_ADV_DEFAULT;
/* Copper options */
if (hw->phy.media_type == e1000_media_type_copper) {
hw->phy.mdix = AUTO_ALL_MODES;
hw->phy.disable_polarity_correction = FALSE;
hw->phy.ms_type = EM_MASTER_SLAVE;
}
/*
* Set the frame limits assuming
* standard ethernet sized frames.
*/
adapter->hw.mac.max_frame_size =
ETHERMTU + ETHER_HDR_LEN + ETHERNET_FCS_SIZE;
/*
* This controls when hardware reports transmit completion
* status.
*/
hw->mac.report_tx_early = 1;
/*
** Get queue/ring memory
*/
if (em_allocate_queues(adapter)) {
error = ENOMEM;
goto err_pci;
}
/* Allocate multicast array memory. */
adapter->mta = malloc(sizeof(u8) * ETH_ADDR_LEN *
MAX_NUM_MULTICAST_ADDRESSES, M_DEVBUF, M_NOWAIT);
if (adapter->mta == NULL) {
device_printf(dev, "Can not allocate multicast setup array\n");
error = ENOMEM;
goto err_late;
}
/* Check SOL/IDER usage */
if (e1000_check_reset_block(hw))
device_printf(dev, "PHY reset is blocked"
" due to SOL/IDER session.\n");
/* Sysctl for setting Energy Efficient Ethernet */
hw->dev_spec.ich8lan.eee_disable = eee_setting;
SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
OID_AUTO, "eee_control", CTLTYPE_INT|CTLFLAG_RW,
adapter, 0, em_sysctl_eee, "I",
"Disable Energy Efficient Ethernet");
/*
** Start from a known state, this is
** important in reading the nvm and
** mac from that.
*/
e1000_reset_hw(hw);
/* Make sure we have a good EEPROM before we read from it */
if (e1000_validate_nvm_checksum(hw) < 0) {
/*
** Some PCI-E parts fail the first check due to
** the link being in sleep state, call it again,
** if it fails a second time its a real issue.
*/
if (e1000_validate_nvm_checksum(hw) < 0) {
device_printf(dev,
"The EEPROM Checksum Is Not Valid\n");
error = EIO;
goto err_late;
}
}
/* Copy the permanent MAC address out of the EEPROM */
if (e1000_read_mac_addr(hw) < 0) {
device_printf(dev, "EEPROM read error while reading MAC"
" address\n");
error = EIO;
goto err_late;
}
if (!em_is_valid_ether_addr(hw->mac.addr)) {
device_printf(dev, "Invalid MAC address\n");
error = EIO;
goto err_late;
}
/* Disable ULP support */
e1000_disable_ulp_lpt_lp(hw, TRUE);
/*
** Do interrupt configuration
*/
if (adapter->msix > 1) /* Do MSIX */
error = em_allocate_msix(adapter);
else /* MSI or Legacy */
error = em_allocate_legacy(adapter);
if (error)
goto err_late;
/*
* Get Wake-on-Lan and Management info for later use
*/
em_get_wakeup(dev);
/* Setup OS specific network interface */
if (em_setup_interface(dev, adapter) != 0)
goto err_late;
em_reset(adapter);
/* Initialize statistics */
em_update_stats_counters(adapter);
hw->mac.get_link_status = 1;
em_update_link_status(adapter);
/* Register for VLAN events */
adapter->vlan_attach = EVENTHANDLER_REGISTER(vlan_config,
em_register_vlan, adapter, EVENTHANDLER_PRI_FIRST);
adapter->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig,
em_unregister_vlan, adapter, EVENTHANDLER_PRI_FIRST);
em_add_hw_stats(adapter);
/* Non-AMT based hardware can now take control from firmware */
if (adapter->has_manage && !adapter->has_amt)
em_get_hw_control(adapter);
/* Tell the stack that the interface is not active */
if_setdrvflagbits(adapter->ifp, IFF_DRV_OACTIVE, IFF_DRV_RUNNING);
adapter->led_dev = led_create(em_led_func, adapter,
device_get_nameunit(dev));
#ifdef DEV_NETMAP
em_netmap_attach(adapter);
#endif /* DEV_NETMAP */
INIT_DEBUGOUT("em_attach: end");
return (0);
err_late:
em_free_transmit_structures(adapter);
em_free_receive_structures(adapter);
em_release_hw_control(adapter);
if (adapter->ifp != (void *)NULL)
if_free(adapter->ifp);
err_pci:
em_free_pci_resources(adapter);
free(adapter->mta, M_DEVBUF);
EM_CORE_LOCK_DESTROY(adapter);
return (error);
}
/*********************************************************************
* Device removal routine
*
* The detach entry point is called when the driver is being removed.
* This routine stops the adapter and deallocates all the resources
* that were allocated for driver operation.
*
* return 0 on success, positive on failure
*********************************************************************/
static int
em_detach(device_t dev)
{
struct adapter *adapter = device_get_softc(dev);
if_t ifp = adapter->ifp;
INIT_DEBUGOUT("em_detach: begin");
/* Make sure VLANS are not using driver */
if (if_vlantrunkinuse(ifp)) {
device_printf(dev,"Vlan in use, detach first\n");
return (EBUSY);
}
#ifdef DEVICE_POLLING
if (if_getcapenable(ifp) & IFCAP_POLLING)
ether_poll_deregister(ifp);
#endif
if (adapter->led_dev != NULL)
led_destroy(adapter->led_dev);
EM_CORE_LOCK(adapter);
adapter->in_detach = 1;
em_stop(adapter);
EM_CORE_UNLOCK(adapter);
EM_CORE_LOCK_DESTROY(adapter);
e1000_phy_hw_reset(&adapter->hw);
em_release_manageability(adapter);
em_release_hw_control(adapter);
/* Unregister VLAN events */
if (adapter->vlan_attach != NULL)
EVENTHANDLER_DEREGISTER(vlan_config, adapter->vlan_attach);
if (adapter->vlan_detach != NULL)
EVENTHANDLER_DEREGISTER(vlan_unconfig, adapter->vlan_detach);
ether_ifdetach(adapter->ifp);
callout_drain(&adapter->timer);
#ifdef DEV_NETMAP
netmap_detach(ifp);
#endif /* DEV_NETMAP */
em_free_pci_resources(adapter);
bus_generic_detach(dev);
if_free(ifp);
em_free_transmit_structures(adapter);
em_free_receive_structures(adapter);
em_release_hw_control(adapter);
free(adapter->mta, M_DEVBUF);
return (0);
}
/*********************************************************************
*
* Shutdown entry point
*
**********************************************************************/
static int
em_shutdown(device_t dev)
{
return em_suspend(dev);
}
/*
* Suspend/resume device methods.
*/
static int
em_suspend(device_t dev)
{
struct adapter *adapter = device_get_softc(dev);
EM_CORE_LOCK(adapter);
em_release_manageability(adapter);
em_release_hw_control(adapter);
em_enable_wakeup(dev);
EM_CORE_UNLOCK(adapter);
return bus_generic_suspend(dev);
}
static int
em_resume(device_t dev)
{
struct adapter *adapter = device_get_softc(dev);
struct tx_ring *txr = adapter->tx_rings;
if_t ifp = adapter->ifp;
EM_CORE_LOCK(adapter);
if (adapter->hw.mac.type == e1000_pch2lan)
e1000_resume_workarounds_pchlan(&adapter->hw);
em_init_locked(adapter);
em_init_manageability(adapter);
if ((if_getflags(ifp) & IFF_UP) &&
(if_getdrvflags(ifp) & IFF_DRV_RUNNING) && adapter->link_active) {
for (int i = 0; i < adapter->num_queues; i++, txr++) {
EM_TX_LOCK(txr);
#ifdef EM_MULTIQUEUE
if (!drbr_empty(ifp, txr->br))
em_mq_start_locked(ifp, txr);
#else
if (!if_sendq_empty(ifp))
em_start_locked(ifp, txr);
#endif
EM_TX_UNLOCK(txr);
}
}
EM_CORE_UNLOCK(adapter);
return bus_generic_resume(dev);
}
#ifndef EM_MULTIQUEUE
static void
em_start_locked(if_t ifp, struct tx_ring *txr)
{
struct adapter *adapter = if_getsoftc(ifp);
struct mbuf *m_head;
EM_TX_LOCK_ASSERT(txr);
if ((if_getdrvflags(ifp) & (IFF_DRV_RUNNING|IFF_DRV_OACTIVE)) !=
IFF_DRV_RUNNING)
return;
if (!adapter->link_active)
return;
while (!if_sendq_empty(ifp)) {
/* Call cleanup if number of TX descriptors low */
if (txr->tx_avail <= EM_TX_CLEANUP_THRESHOLD)
em_txeof(txr);
if (txr->tx_avail < EM_MAX_SCATTER) {
if_setdrvflagbits(ifp,IFF_DRV_OACTIVE, 0);
break;
}
m_head = if_dequeue(ifp);
if (m_head == NULL)
break;
/*
* Encapsulation can modify our pointer, and or make it
* NULL on failure. In that event, we can't requeue.
*/
if (em_xmit(txr, &m_head)) {
if (m_head == NULL)
break;
if_sendq_prepend(ifp, m_head);
break;
}
/* Mark the queue as having work */
if (txr->busy == EM_TX_IDLE)
txr->busy = EM_TX_BUSY;
/* Send a copy of the frame to the BPF listener */
ETHER_BPF_MTAP(ifp, m_head);
}
return;
}
static void
em_start(if_t ifp)
{
struct adapter *adapter = if_getsoftc(ifp);
struct tx_ring *txr = adapter->tx_rings;
if (if_getdrvflags(ifp) & IFF_DRV_RUNNING) {
EM_TX_LOCK(txr);
em_start_locked(ifp, txr);
EM_TX_UNLOCK(txr);
}
return;
}
#else /* EM_MULTIQUEUE */
/*********************************************************************
* Multiqueue Transmit routines
*
* em_mq_start is called by the stack to initiate a transmit.
* however, if busy the driver can queue the request rather
* than do an immediate send. It is this that is an advantage
* in this driver, rather than also having multiple tx queues.
**********************************************************************/
/*
** Multiqueue capable stack interface
*/
static int
em_mq_start(if_t ifp, struct mbuf *m)
{
struct adapter *adapter = if_getsoftc(ifp);
struct tx_ring *txr = adapter->tx_rings;
unsigned int i, error;
if (M_HASHTYPE_GET(m) != M_HASHTYPE_NONE)
i = m->m_pkthdr.flowid % adapter->num_queues;
else
i = curcpu % adapter->num_queues;
txr = &adapter->tx_rings[i];
error = drbr_enqueue(ifp, txr->br, m);
if (error)
return (error);
if (EM_TX_TRYLOCK(txr)) {
em_mq_start_locked(ifp, txr);
EM_TX_UNLOCK(txr);
} else
taskqueue_enqueue(txr->tq, &txr->tx_task);
return (0);
}
static int
em_mq_start_locked(if_t ifp, struct tx_ring *txr)
{
struct adapter *adapter = txr->adapter;
struct mbuf *next;
int err = 0, enq = 0;
EM_TX_LOCK_ASSERT(txr);
if (((if_getdrvflags(ifp) & IFF_DRV_RUNNING) == 0) ||
adapter->link_active == 0) {
return (ENETDOWN);
}
/* Process the queue */
while ((next = drbr_peek(ifp, txr->br)) != NULL) {
if ((err = em_xmit(txr, &next)) != 0) {
if (next == NULL) {
/* It was freed, move forward */
drbr_advance(ifp, txr->br);
} else {
/*
* Still have one left, it may not be
* the same since the transmit function
* may have changed it.
*/
drbr_putback(ifp, txr->br, next);
}
break;
}
drbr_advance(ifp, txr->br);
enq++;
if_inc_counter(ifp, IFCOUNTER_OBYTES, next->m_pkthdr.len);
if (next->m_flags & M_MCAST)
if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1);
ETHER_BPF_MTAP(ifp, next);
if ((if_getdrvflags(ifp) & IFF_DRV_RUNNING) == 0)
break;
}
/* Mark the queue as having work */
if ((enq > 0) && (txr->busy == EM_TX_IDLE))
txr->busy = EM_TX_BUSY;
if (txr->tx_avail < EM_MAX_SCATTER)
em_txeof(txr);
if (txr->tx_avail < EM_MAX_SCATTER) {
if_setdrvflagbits(ifp, IFF_DRV_OACTIVE,0);
}
return (err);
}
/*
** Flush all ring buffers
*/
static void
em_qflush(if_t ifp)
{
struct adapter *adapter = if_getsoftc(ifp);
struct tx_ring *txr = adapter->tx_rings;
struct mbuf *m;
for (int i = 0; i < adapter->num_queues; i++, txr++) {
EM_TX_LOCK(txr);
while ((m = buf_ring_dequeue_sc(txr->br)) != NULL)
m_freem(m);
EM_TX_UNLOCK(txr);
}
if_qflush(ifp);
}
#endif /* EM_MULTIQUEUE */
/*********************************************************************
* Ioctl entry point
*
* em_ioctl is called when the user wants to configure the
* interface.
*
* return 0 on success, positive on failure
**********************************************************************/
static int
em_ioctl(if_t ifp, u_long command, caddr_t data)
{
struct adapter *adapter = if_getsoftc(ifp);
struct ifreq *ifr = (struct ifreq *)data;
#if defined(INET) || defined(INET6)
struct ifaddr *ifa = (struct ifaddr *)data;
#endif
bool avoid_reset = FALSE;
int error = 0;
if (adapter->in_detach)
return (error);
switch (command) {
case SIOCSIFADDR:
#ifdef INET
if (ifa->ifa_addr->sa_family == AF_INET)
avoid_reset = TRUE;
#endif
#ifdef INET6
if (ifa->ifa_addr->sa_family == AF_INET6)
avoid_reset = TRUE;
#endif
/*
** Calling init results in link renegotiation,
** so we avoid doing it when possible.
*/
if (avoid_reset) {
if_setflagbits(ifp,IFF_UP,0);
if (!(if_getdrvflags(ifp)& IFF_DRV_RUNNING))
em_init(adapter);
#ifdef INET
if (!(if_getflags(ifp) & IFF_NOARP))
arp_ifinit(ifp, ifa);
#endif
} else
error = ether_ioctl(ifp, command, data);
break;
case SIOCSIFMTU:
{
int max_frame_size;
IOCTL_DEBUGOUT("ioctl rcv'd: SIOCSIFMTU (Set Interface MTU)");
EM_CORE_LOCK(adapter);
switch (adapter->hw.mac.type) {
case e1000_82571:
case e1000_82572:
case e1000_ich9lan:
case e1000_ich10lan:
case e1000_pch2lan:
case e1000_pch_lpt:
case e1000_82574:
case e1000_82583:
case e1000_80003es2lan: /* 9K Jumbo Frame size */
max_frame_size = 9234;
break;
case e1000_pchlan:
max_frame_size = 4096;
break;
/* Adapters that do not support jumbo frames */
case e1000_ich8lan:
max_frame_size = ETHER_MAX_LEN;
break;
default:
max_frame_size = MAX_JUMBO_FRAME_SIZE;
}
if (ifr->ifr_mtu > max_frame_size - ETHER_HDR_LEN -
ETHER_CRC_LEN) {
EM_CORE_UNLOCK(adapter);
error = EINVAL;
break;
}
if_setmtu(ifp, ifr->ifr_mtu);
adapter->hw.mac.max_frame_size =
if_getmtu(ifp) + ETHER_HDR_LEN + ETHER_CRC_LEN;
em_init_locked(adapter);
EM_CORE_UNLOCK(adapter);
break;
}
case SIOCSIFFLAGS:
IOCTL_DEBUGOUT("ioctl rcv'd:\
SIOCSIFFLAGS (Set Interface Flags)");
EM_CORE_LOCK(adapter);
if (if_getflags(ifp) & IFF_UP) {
if (if_getdrvflags(ifp) & IFF_DRV_RUNNING) {
if ((if_getflags(ifp) ^ adapter->if_flags) &
(IFF_PROMISC | IFF_ALLMULTI)) {
em_disable_promisc(adapter);
em_set_promisc(adapter);
}
} else
em_init_locked(adapter);
} else
if (if_getdrvflags(ifp) & IFF_DRV_RUNNING)
em_stop(adapter);
adapter->if_flags = if_getflags(ifp);
EM_CORE_UNLOCK(adapter);
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
IOCTL_DEBUGOUT("ioctl rcv'd: SIOC(ADD|DEL)MULTI");
if (if_getdrvflags(ifp) & IFF_DRV_RUNNING) {
EM_CORE_LOCK(adapter);
em_disable_intr(adapter);
em_set_multi(adapter);
#ifdef DEVICE_POLLING
if (!(if_getcapenable(ifp) & IFCAP_POLLING))
#endif
em_enable_intr(adapter);
EM_CORE_UNLOCK(adapter);
}
break;
case SIOCSIFMEDIA:
/* Check SOL/IDER usage */
EM_CORE_LOCK(adapter);
if (e1000_check_reset_block(&adapter->hw)) {
EM_CORE_UNLOCK(adapter);
device_printf(adapter->dev, "Media change is"
" blocked due to SOL/IDER session.\n");
break;
}
EM_CORE_UNLOCK(adapter);
/* falls thru */
case SIOCGIFMEDIA:
IOCTL_DEBUGOUT("ioctl rcv'd: \
SIOCxIFMEDIA (Get/Set Interface Media)");
error = ifmedia_ioctl(ifp, ifr, &adapter->media, command);
break;
case SIOCSIFCAP:
{
int mask, reinit;
IOCTL_DEBUGOUT("ioctl rcv'd: SIOCSIFCAP (Set Capabilities)");
reinit = 0;
mask = ifr->ifr_reqcap ^ if_getcapenable(ifp);
#ifdef DEVICE_POLLING
if (mask & IFCAP_POLLING) {
if (ifr->ifr_reqcap & IFCAP_POLLING) {
error = ether_poll_register(em_poll, ifp);
if (error)
return (error);
EM_CORE_LOCK(adapter);
em_disable_intr(adapter);
if_setcapenablebit(ifp, IFCAP_POLLING, 0);
EM_CORE_UNLOCK(adapter);
} else {
error = ether_poll_deregister(ifp);
/* Enable interrupt even in error case */
EM_CORE_LOCK(adapter);
em_enable_intr(adapter);
if_setcapenablebit(ifp, 0, IFCAP_POLLING);
EM_CORE_UNLOCK(adapter);
}
}
#endif
if (mask & IFCAP_HWCSUM) {
if_togglecapenable(ifp,IFCAP_HWCSUM);
reinit = 1;
}
if (mask & IFCAP_TSO4) {
if_togglecapenable(ifp,IFCAP_TSO4);
reinit = 1;
}
if (mask & IFCAP_VLAN_HWTAGGING) {
if_togglecapenable(ifp,IFCAP_VLAN_HWTAGGING);
reinit = 1;
}
if (mask & IFCAP_VLAN_HWFILTER) {
if_togglecapenable(ifp, IFCAP_VLAN_HWFILTER);
reinit = 1;
}
if (mask & IFCAP_VLAN_HWTSO) {
if_togglecapenable(ifp, IFCAP_VLAN_HWTSO);
reinit = 1;
}
if ((mask & IFCAP_WOL) &&
(if_getcapabilities(ifp) & IFCAP_WOL) != 0) {
if (mask & IFCAP_WOL_MCAST)
if_togglecapenable(ifp, IFCAP_WOL_MCAST);
if (mask & IFCAP_WOL_MAGIC)
if_togglecapenable(ifp, IFCAP_WOL_MAGIC);
}
if (reinit && (if_getdrvflags(ifp) & IFF_DRV_RUNNING))
em_init(adapter);
if_vlancap(ifp);
break;
}
default:
error = ether_ioctl(ifp, command, data);
break;
}
return (error);
}
/*********************************************************************
* Init entry point
*
* This routine is used in two ways. It is used by the stack as
* init entry point in network interface structure. It is also used
* by the driver as a hw/sw initialization routine to get to a
* consistent state.
*
* return 0 on success, positive on failure
**********************************************************************/
static void
em_init_locked(struct adapter *adapter)
{
if_t ifp = adapter->ifp;
device_t dev = adapter->dev;
INIT_DEBUGOUT("em_init: begin");
EM_CORE_LOCK_ASSERT(adapter);
em_disable_intr(adapter);
callout_stop(&adapter->timer);
/* Get the latest mac address, User can use a LAA */
bcopy(if_getlladdr(adapter->ifp), adapter->hw.mac.addr,
ETHER_ADDR_LEN);
/* Put the address into the Receive Address Array */
e1000_rar_set(&adapter->hw, adapter->hw.mac.addr, 0);
/*
* With the 82571 adapter, RAR[0] may be overwritten
* when the other port is reset, we make a duplicate
* in RAR[14] for that eventuality, this assures
* the interface continues to function.
*/
if (adapter->hw.mac.type == e1000_82571) {
e1000_set_laa_state_82571(&adapter->hw, TRUE);
e1000_rar_set(&adapter->hw, adapter->hw.mac.addr,
E1000_RAR_ENTRIES - 1);
}
/* Initialize the hardware */
em_reset(adapter);
em_update_link_status(adapter);
/* Setup VLAN support, basic and offload if available */
E1000_WRITE_REG(&adapter->hw, E1000_VET, ETHERTYPE_VLAN);
/* Set hardware offload abilities */
if_clearhwassist(ifp);
if (if_getcapenable(ifp) & IFCAP_TXCSUM)
if_sethwassistbits(ifp, CSUM_TCP | CSUM_UDP, 0);
if (if_getcapenable(ifp) & IFCAP_TSO4)
if_sethwassistbits(ifp, CSUM_TSO, 0);
/* Configure for OS presence */
em_init_manageability(adapter);
/* Prepare transmit descriptors and buffers */
em_setup_transmit_structures(adapter);
em_initialize_transmit_unit(adapter);
/* Setup Multicast table */
em_set_multi(adapter);
/*
** Figure out the desired mbuf
** pool for doing jumbos
*/
if (adapter->hw.mac.max_frame_size <= 2048)
adapter->rx_mbuf_sz = MCLBYTES;
else if (adapter->hw.mac.max_frame_size <= 4096)
adapter->rx_mbuf_sz = MJUMPAGESIZE;
else
adapter->rx_mbuf_sz = MJUM9BYTES;
/* Prepare receive descriptors and buffers */
if (em_setup_receive_structures(adapter)) {
device_printf(dev, "Could not setup receive structures\n");
em_stop(adapter);
return;
}
em_initialize_receive_unit(adapter);
/* Use real VLAN Filter support? */
if (if_getcapenable(ifp) & IFCAP_VLAN_HWTAGGING) {
if (if_getcapenable(ifp) & IFCAP_VLAN_HWFILTER)
/* Use real VLAN Filter support */
em_setup_vlan_hw_support(adapter);
else {
u32 ctrl;
ctrl = E1000_READ_REG(&adapter->hw, E1000_CTRL);
ctrl |= E1000_CTRL_VME;
E1000_WRITE_REG(&adapter->hw, E1000_CTRL, ctrl);
}
}
/* Don't lose promiscuous settings */
em_set_promisc(adapter);
/* Set the interface as ACTIVE */
if_setdrvflagbits(ifp, IFF_DRV_RUNNING, IFF_DRV_OACTIVE);
callout_reset(&adapter->timer, hz, em_local_timer, adapter);
e1000_clear_hw_cntrs_base_generic(&adapter->hw);
/* MSI/X configuration for 82574 */
if (adapter->hw.mac.type == e1000_82574) {
int tmp;
tmp = E1000_READ_REG(&adapter->hw, E1000_CTRL_EXT);
tmp |= E1000_CTRL_EXT_PBA_CLR;
E1000_WRITE_REG(&adapter->hw, E1000_CTRL_EXT, tmp);
/* Set the IVAR - interrupt vector routing. */
E1000_WRITE_REG(&adapter->hw, E1000_IVAR, adapter->ivars);
}
#ifdef DEVICE_POLLING
/*
* Only enable interrupts if we are not polling, make sure
* they are off otherwise.
*/
if (if_getcapenable(ifp) & IFCAP_POLLING)
em_disable_intr(adapter);
else
#endif /* DEVICE_POLLING */
em_enable_intr(adapter);
/* AMT based hardware can now take control from firmware */
if (adapter->has_manage && adapter->has_amt)
em_get_hw_control(adapter);
}
static void
em_init(void *arg)
{
struct adapter *adapter = arg;
EM_CORE_LOCK(adapter);
em_init_locked(adapter);
EM_CORE_UNLOCK(adapter);
}
#ifdef DEVICE_POLLING
/*********************************************************************
*
* Legacy polling routine: note this only works with single queue
*
*********************************************************************/
static int
em_poll(if_t ifp, enum poll_cmd cmd, int count)
{
struct adapter *adapter = if_getsoftc(ifp);
struct tx_ring *txr = adapter->tx_rings;
struct rx_ring *rxr = adapter->rx_rings;
u32 reg_icr;
int rx_done;
EM_CORE_LOCK(adapter);
if ((if_getdrvflags(ifp) & IFF_DRV_RUNNING) == 0) {
EM_CORE_UNLOCK(adapter);
return (0);
}
if (cmd == POLL_AND_CHECK_STATUS) {
reg_icr = E1000_READ_REG(&adapter->hw, E1000_ICR);
if (reg_icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
callout_stop(&adapter->timer);
adapter->hw.mac.get_link_status = 1;
em_update_link_status(adapter);
callout_reset(&adapter->timer, hz,
em_local_timer, adapter);
}
}
EM_CORE_UNLOCK(adapter);
em_rxeof(rxr, count, &rx_done);
EM_TX_LOCK(txr);
em_txeof(txr);
#ifdef EM_MULTIQUEUE
if (!drbr_empty(ifp, txr->br))
em_mq_start_locked(ifp, txr);
#else
if (!if_sendq_empty(ifp))
em_start_locked(ifp, txr);
#endif
EM_TX_UNLOCK(txr);
return (rx_done);
}
#endif /* DEVICE_POLLING */
/*********************************************************************
*
* Fast Legacy/MSI Combined Interrupt Service routine
*
*********************************************************************/
static int
em_irq_fast(void *arg)
{
struct adapter *adapter = arg;
if_t ifp;
u32 reg_icr;
ifp = adapter->ifp;
reg_icr = E1000_READ_REG(&adapter->hw, E1000_ICR);
/* Hot eject? */
if (reg_icr == 0xffffffff)
return FILTER_STRAY;
/* Definitely not our interrupt. */
if (reg_icr == 0x0)
return FILTER_STRAY;
/*
* Starting with the 82571 chip, bit 31 should be used to
* determine whether the interrupt belongs to us.
*/
if (adapter->hw.mac.type >= e1000_82571 &&
(reg_icr & E1000_ICR_INT_ASSERTED) == 0)
return FILTER_STRAY;
em_disable_intr(adapter);
taskqueue_enqueue(adapter->tq, &adapter->que_task);
/* Link status change */
if (reg_icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
adapter->hw.mac.get_link_status = 1;
taskqueue_enqueue(taskqueue_fast, &adapter->link_task);
}
if (reg_icr & E1000_ICR_RXO)
adapter->rx_overruns++;
return FILTER_HANDLED;
}
/* Combined RX/TX handler, used by Legacy and MSI */
static void
em_handle_que(void *context, int pending)
{
struct adapter *adapter = context;
if_t ifp = adapter->ifp;
struct tx_ring *txr = adapter->tx_rings;
struct rx_ring *rxr = adapter->rx_rings;
if (if_getdrvflags(ifp) & IFF_DRV_RUNNING) {
bool more = em_rxeof(rxr, adapter->rx_process_limit, NULL);
EM_TX_LOCK(txr);
em_txeof(txr);
#ifdef EM_MULTIQUEUE
if (!drbr_empty(ifp, txr->br))
em_mq_start_locked(ifp, txr);
#else
if (!if_sendq_empty(ifp))
em_start_locked(ifp, txr);
#endif
EM_TX_UNLOCK(txr);
if (more) {
taskqueue_enqueue(adapter->tq, &adapter->que_task);
return;
}
}
em_enable_intr(adapter);
return;
}
/*********************************************************************
*
* MSIX Interrupt Service Routines
*
**********************************************************************/
static void
em_msix_tx(void *arg)
{
struct tx_ring *txr = arg;
struct adapter *adapter = txr->adapter;
if_t ifp = adapter->ifp;
++txr->tx_irq;
EM_TX_LOCK(txr);
em_txeof(txr);
#ifdef EM_MULTIQUEUE
if (!drbr_empty(ifp, txr->br))
em_mq_start_locked(ifp, txr);
#else
if (!if_sendq_empty(ifp))
em_start_locked(ifp, txr);
#endif
/* Reenable this interrupt */
E1000_WRITE_REG(&adapter->hw, E1000_IMS, txr->ims);
EM_TX_UNLOCK(txr);
return;
}
/*********************************************************************
*
* MSIX RX Interrupt Service routine
*
**********************************************************************/
static void
em_msix_rx(void *arg)
{
struct rx_ring *rxr = arg;
struct adapter *adapter = rxr->adapter;
bool more;
++rxr->rx_irq;
if (!(if_getdrvflags(adapter->ifp) & IFF_DRV_RUNNING))
return;
more = em_rxeof(rxr, adapter->rx_process_limit, NULL);
if (more)
taskqueue_enqueue(rxr->tq, &rxr->rx_task);
else {
/* Reenable this interrupt */
E1000_WRITE_REG(&adapter->hw, E1000_IMS, rxr->ims);
}
return;
}
/*********************************************************************
*
* MSIX Link Fast Interrupt Service routine
*
**********************************************************************/
static void
em_msix_link(void *arg)
{
struct adapter *adapter = arg;
u32 reg_icr;
++adapter->link_irq;
reg_icr = E1000_READ_REG(&adapter->hw, E1000_ICR);
if (reg_icr & E1000_ICR_RXO)
adapter->rx_overruns++;
if (reg_icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
adapter->hw.mac.get_link_status = 1;
em_handle_link(adapter, 0);
} else
E1000_WRITE_REG(&adapter->hw, E1000_IMS,
EM_MSIX_LINK | E1000_IMS_LSC);
/*
** Because we must read the ICR for this interrupt
** it may clear other causes using autoclear, for
** this reason we simply create a soft interrupt
** for all these vectors.
*/
if (reg_icr) {
E1000_WRITE_REG(&adapter->hw,
E1000_ICS, adapter->ims);
}
return;
}
static void
em_handle_rx(void *context, int pending)
{
struct rx_ring *rxr = context;
struct adapter *adapter = rxr->adapter;
bool more;
more = em_rxeof(rxr, adapter->rx_process_limit, NULL);
if (more)
taskqueue_enqueue(rxr->tq, &rxr->rx_task);
else {
/* Reenable this interrupt */
E1000_WRITE_REG(&adapter->hw, E1000_IMS, rxr->ims);
}
}
static void
em_handle_tx(void *context, int pending)
{
struct tx_ring *txr = context;
struct adapter *adapter = txr->adapter;
if_t ifp = adapter->ifp;
EM_TX_LOCK(txr);
em_txeof(txr);
#ifdef EM_MULTIQUEUE
if (!drbr_empty(ifp, txr->br))
em_mq_start_locked(ifp, txr);
#else
if (!if_sendq_empty(ifp))
em_start_locked(ifp, txr);
#endif
E1000_WRITE_REG(&adapter->hw, E1000_IMS, txr->ims);
EM_TX_UNLOCK(txr);
}
static void
em_handle_link(void *context, int pending)
{
struct adapter *adapter = context;
struct tx_ring *txr = adapter->tx_rings;
if_t ifp = adapter->ifp;
if (!(if_getdrvflags(ifp) & IFF_DRV_RUNNING))
return;
EM_CORE_LOCK(adapter);
callout_stop(&adapter->timer);
em_update_link_status(adapter);
callout_reset(&adapter->timer, hz, em_local_timer, adapter);
E1000_WRITE_REG(&adapter->hw, E1000_IMS,
EM_MSIX_LINK | E1000_IMS_LSC);
if (adapter->link_active) {
for (int i = 0; i < adapter->num_queues; i++, txr++) {
EM_TX_LOCK(txr);
#ifdef EM_MULTIQUEUE
if (!drbr_empty(ifp, txr->br))
em_mq_start_locked(ifp, txr);
#else
if (if_sendq_empty(ifp))
em_start_locked(ifp, txr);
#endif
EM_TX_UNLOCK(txr);
}
}
EM_CORE_UNLOCK(adapter);
}
/*********************************************************************
*
* Media Ioctl callback
*
* This routine is called whenever the user queries the status of
* the interface using ifconfig.
*
**********************************************************************/
static void
em_media_status(if_t ifp, struct ifmediareq *ifmr)
{
struct adapter *adapter = if_getsoftc(ifp);
u_char fiber_type = IFM_1000_SX;
INIT_DEBUGOUT("em_media_status: begin");
EM_CORE_LOCK(adapter);
em_update_link_status(adapter);
ifmr->ifm_status = IFM_AVALID;
ifmr->ifm_active = IFM_ETHER;
if (!adapter->link_active) {
EM_CORE_UNLOCK(adapter);
return;
}
ifmr->ifm_status |= IFM_ACTIVE;
if ((adapter->hw.phy.media_type == e1000_media_type_fiber) ||
(adapter->hw.phy.media_type == e1000_media_type_internal_serdes)) {
ifmr->ifm_active |= fiber_type | IFM_FDX;
} else {
switch (adapter->link_speed) {
case 10:
ifmr->ifm_active |= IFM_10_T;
break;
case 100:
ifmr->ifm_active |= IFM_100_TX;
break;
case 1000:
ifmr->ifm_active |= IFM_1000_T;
break;
}
if (adapter->link_duplex == FULL_DUPLEX)
ifmr->ifm_active |= IFM_FDX;
else
ifmr->ifm_active |= IFM_HDX;
}
EM_CORE_UNLOCK(adapter);
}
/*********************************************************************
*
* Media Ioctl callback
*
* This routine is called when the user changes speed/duplex using
* media/mediopt option with ifconfig.
*
**********************************************************************/
static int
em_media_change(if_t ifp)
{
struct adapter *adapter = if_getsoftc(ifp);
struct ifmedia *ifm = &adapter->media;
INIT_DEBUGOUT("em_media_change: begin");
if (IFM_TYPE(ifm->ifm_media) != IFM_ETHER)
return (EINVAL);
EM_CORE_LOCK(adapter);
switch (IFM_SUBTYPE(ifm->ifm_media)) {
case IFM_AUTO:
adapter->hw.mac.autoneg = DO_AUTO_NEG;
adapter->hw.phy.autoneg_advertised = AUTONEG_ADV_DEFAULT;
break;
case IFM_1000_LX:
case IFM_1000_SX:
case IFM_1000_T:
adapter->hw.mac.autoneg = DO_AUTO_NEG;
adapter->hw.phy.autoneg_advertised = ADVERTISE_1000_FULL;
break;
case IFM_100_TX:
adapter->hw.mac.autoneg = FALSE;
adapter->hw.phy.autoneg_advertised = 0;
if ((ifm->ifm_media & IFM_GMASK) == IFM_FDX)
adapter->hw.mac.forced_speed_duplex = ADVERTISE_100_FULL;
else
adapter->hw.mac.forced_speed_duplex = ADVERTISE_100_HALF;
break;
case IFM_10_T:
adapter->hw.mac.autoneg = FALSE;
adapter->hw.phy.autoneg_advertised = 0;
if ((ifm->ifm_media & IFM_GMASK) == IFM_FDX)
adapter->hw.mac.forced_speed_duplex = ADVERTISE_10_FULL;
else
adapter->hw.mac.forced_speed_duplex = ADVERTISE_10_HALF;
break;
default:
device_printf(adapter->dev, "Unsupported media type\n");
}
em_init_locked(adapter);
EM_CORE_UNLOCK(adapter);
return (0);
}
/*********************************************************************
*
* This routine maps the mbufs to tx descriptors.
*
* return 0 on success, positive on failure
**********************************************************************/
static int
em_xmit(struct tx_ring *txr, struct mbuf **m_headp)
{
struct adapter *adapter = txr->adapter;
bus_dma_segment_t segs[EM_MAX_SCATTER];
bus_dmamap_t map;
struct em_buffer *tx_buffer, *tx_buffer_mapped;
struct e1000_tx_desc *ctxd = NULL;
struct mbuf *m_head;
struct ether_header *eh;
struct ip *ip = NULL;
struct tcphdr *tp = NULL;
u32 txd_upper, txd_lower, txd_used, txd_saved;
int ip_off, poff;
int nsegs, i, j, first, last = 0;
int error, do_tso, tso_desc = 0, remap = 1;
m_head = *m_headp;
txd_upper = txd_lower = txd_used = txd_saved = 0;
do_tso = ((m_head->m_pkthdr.csum_flags & CSUM_TSO) != 0);
ip_off = poff = 0;
/*
* Intel recommends entire IP/TCP header length reside in a single
* buffer. If multiple descriptors are used to describe the IP and
* TCP header, each descriptor should describe one or more
* complete headers; descriptors referencing only parts of headers
* are not supported. If all layer headers are not coalesced into
* a single buffer, each buffer should not cross a 4KB boundary,
* or be larger than the maximum read request size.
* Controller also requires modifing IP/TCP header to make TSO work
* so we firstly get a writable mbuf chain then coalesce ethernet/
* IP/TCP header into a single buffer to meet the requirement of
* controller. This also simplifies IP/TCP/UDP checksum offloading
* which also has similiar restrictions.
*/
if (do_tso || m_head->m_pkthdr.csum_flags & CSUM_OFFLOAD) {
if (do_tso || (m_head->m_next != NULL &&
m_head->m_pkthdr.csum_flags & CSUM_OFFLOAD)) {
if (M_WRITABLE(*m_headp) == 0) {
m_head = m_dup(*m_headp, M_NOWAIT);
m_freem(*m_headp);
if (m_head == NULL) {
*m_headp = NULL;
return (ENOBUFS);
}
*m_headp = m_head;
}
}
/*
* XXX
* Assume IPv4, we don't have TSO/checksum offload support
* for IPv6 yet.
*/
ip_off = sizeof(struct ether_header);
m_head = m_pullup(m_head, ip_off);
if (m_head == NULL) {
*m_headp = NULL;
return (ENOBUFS);
}
eh = mtod(m_head, struct ether_header *);
if (eh->ether_type == htons(ETHERTYPE_VLAN)) {
ip_off = sizeof(struct ether_vlan_header);
m_head = m_pullup(m_head, ip_off);
if (m_head == NULL) {
*m_headp = NULL;
return (ENOBUFS);
}
}
m_head = m_pullup(m_head, ip_off + sizeof(struct ip));
if (m_head == NULL) {
*m_headp = NULL;
return (ENOBUFS);
}
ip = (struct ip *)(mtod(m_head, char *) + ip_off);
poff = ip_off + (ip->ip_hl << 2);
if (do_tso) {
m_head = m_pullup(m_head, poff + sizeof(struct tcphdr));
if (m_head == NULL) {
*m_headp = NULL;
return (ENOBUFS);
}
tp = (struct tcphdr *)(mtod(m_head, char *) + poff);
/*
* TSO workaround:
* pull 4 more bytes of data into it.
*/
m_head = m_pullup(m_head, poff + (tp->th_off << 2) + 4);
if (m_head == NULL) {
*m_headp = NULL;
return (ENOBUFS);
}
ip = (struct ip *)(mtod(m_head, char *) + ip_off);
ip->ip_len = 0;
ip->ip_sum = 0;
/*
* The pseudo TCP checksum does not include TCP payload
* length so driver should recompute the checksum here
* what hardware expect to see. This is adherence of
* Microsoft's Large Send specification.
*/
tp = (struct tcphdr *)(mtod(m_head, char *) + poff);
tp->th_sum = in_pseudo(ip->ip_src.s_addr,
ip->ip_dst.s_addr, htons(IPPROTO_TCP));
} else if (m_head->m_pkthdr.csum_flags & CSUM_TCP) {
m_head = m_pullup(m_head, poff + sizeof(struct tcphdr));
if (m_head == NULL) {
*m_headp = NULL;
return (ENOBUFS);
}
tp = (struct tcphdr *)(mtod(m_head, char *) + poff);
m_head = m_pullup(m_head, poff + (tp->th_off << 2));
if (m_head == NULL) {
*m_headp = NULL;
return (ENOBUFS);
}
ip = (struct ip *)(mtod(m_head, char *) + ip_off);
tp = (struct tcphdr *)(mtod(m_head, char *) + poff);
} else if (m_head->m_pkthdr.csum_flags & CSUM_UDP) {
m_head = m_pullup(m_head, poff + sizeof(struct udphdr));
if (m_head == NULL) {
*m_headp = NULL;
return (ENOBUFS);
}
ip = (struct ip *)(mtod(m_head, char *) + ip_off);
}
*m_headp = m_head;
}
/*
* Map the packet for DMA
*
* Capture the first descriptor index,
* this descriptor will have the index
* of the EOP which is the only one that
* now gets a DONE bit writeback.
*/
first = txr->next_avail_desc;
tx_buffer = &txr->tx_buffers[first];
tx_buffer_mapped = tx_buffer;
map = tx_buffer->map;
retry:
error = bus_dmamap_load_mbuf_sg(txr->txtag, map,
*m_headp, segs, &nsegs, BUS_DMA_NOWAIT);
/*
* There are two types of errors we can (try) to handle:
* - EFBIG means the mbuf chain was too long and bus_dma ran
* out of segments. Defragment the mbuf chain and try again.
* - ENOMEM means bus_dma could not obtain enough bounce buffers
* at this point in time. Defer sending and try again later.
* All other errors, in particular EINVAL, are fatal and prevent the
* mbuf chain from ever going through. Drop it and report error.
*/
if (error == EFBIG && remap) {
struct mbuf *m;
m = m_defrag(*m_headp, M_NOWAIT);
if (m == NULL) {
adapter->mbuf_alloc_failed++;
m_freem(*m_headp);
*m_headp = NULL;
return (ENOBUFS);
}
*m_headp = m;
/* Try it again, but only once */
remap = 0;
goto retry;
} else if (error == ENOMEM) {
adapter->no_tx_dma_setup++;
return (error);
} else if (error != 0) {
adapter->no_tx_dma_setup++;
m_freem(*m_headp);
*m_headp = NULL;
return (error);
}
/*
* TSO Hardware workaround, if this packet is not
* TSO, and is only a single descriptor long, and
* it follows a TSO burst, then we need to add a
* sentinel descriptor to prevent premature writeback.
*/
if ((do_tso == 0) && (txr->tx_tso == TRUE)) {
if (nsegs == 1)
tso_desc = TRUE;
txr->tx_tso = FALSE;
}
if (nsegs > (txr->tx_avail - 2)) {
txr->no_desc_avail++;
bus_dmamap_unload(txr->txtag, map);
return (ENOBUFS);
}
m_head = *m_headp;
/* Do hardware assists */
if (m_head->m_pkthdr.csum_flags & CSUM_TSO) {
em_tso_setup(txr, m_head, ip_off, ip, tp,
&txd_upper, &txd_lower);
/* we need to make a final sentinel transmit desc */
tso_desc = TRUE;
} else if (m_head->m_pkthdr.csum_flags & CSUM_OFFLOAD)
em_transmit_checksum_setup(txr, m_head,
ip_off, ip, &txd_upper, &txd_lower);
if (m_head->m_flags & M_VLANTAG) {
/* Set the vlan id. */
txd_upper |= htole16(if_getvtag(m_head)) << 16;
/* Tell hardware to add tag */
txd_lower |= htole32(E1000_TXD_CMD_VLE);
}
i = txr->next_avail_desc;
/* Set up our transmit descriptors */
for (j = 0; j < nsegs; j++) {
bus_size_t seg_len;
bus_addr_t seg_addr;
tx_buffer = &txr->tx_buffers[i];
ctxd = &txr->tx_base[i];
seg_addr = segs[j].ds_addr;
seg_len = segs[j].ds_len;
/*
** TSO Workaround:
** If this is the last descriptor, we want to
** split it so we have a small final sentinel
*/
if (tso_desc && (j == (nsegs -1)) && (seg_len > 8)) {
seg_len -= 4;
ctxd->buffer_addr = htole64(seg_addr);
ctxd->lower.data = htole32(
adapter->txd_cmd | txd_lower | seg_len);
ctxd->upper.data =
htole32(txd_upper);
if (++i == adapter->num_tx_desc)
i = 0;
/* Now make the sentinel */
++txd_used; /* using an extra txd */
ctxd = &txr->tx_base[i];
tx_buffer = &txr->tx_buffers[i];
ctxd->buffer_addr =
htole64(seg_addr + seg_len);
ctxd->lower.data = htole32(
adapter->txd_cmd | txd_lower | 4);
ctxd->upper.data =
htole32(txd_upper);
last = i;
if (++i == adapter->num_tx_desc)
i = 0;
} else {
ctxd->buffer_addr = htole64(seg_addr);
ctxd->lower.data = htole32(
adapter->txd_cmd | txd_lower | seg_len);
ctxd->upper.data =
htole32(txd_upper);
last = i;
if (++i == adapter->num_tx_desc)
i = 0;
}
tx_buffer->m_head = NULL;
tx_buffer->next_eop = -1;
}
txr->next_avail_desc = i;
txr->tx_avail -= nsegs;
if (tso_desc) /* TSO used an extra for sentinel */
txr->tx_avail -= txd_used;
tx_buffer->m_head = m_head;
/*
** Here we swap the map so the last descriptor,
** which gets the completion interrupt has the
** real map, and the first descriptor gets the
** unused map from this descriptor.
*/
tx_buffer_mapped->map = tx_buffer->map;
tx_buffer->map = map;
bus_dmamap_sync(txr->txtag, map, BUS_DMASYNC_PREWRITE);
/*
* Last Descriptor of Packet
* needs End Of Packet (EOP)
* and Report Status (RS)
*/
ctxd->lower.data |=
htole32(E1000_TXD_CMD_EOP | E1000_TXD_CMD_RS);
/*
* Keep track in the first buffer which
* descriptor will be written back
*/
tx_buffer = &txr->tx_buffers[first];
tx_buffer->next_eop = last;
/*
* Advance the Transmit Descriptor Tail (TDT), this tells the E1000
* that this frame is available to transmit.
*/
bus_dmamap_sync(txr->txdma.dma_tag, txr->txdma.dma_map,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
E1000_WRITE_REG(&adapter->hw, E1000_TDT(txr->me), i);
return (0);
}
static void
em_set_promisc(struct adapter *adapter)
{
if_t ifp = adapter->ifp;
u32 reg_rctl;
reg_rctl = E1000_READ_REG(&adapter->hw, E1000_RCTL);
if (if_getflags(ifp) & IFF_PROMISC) {
reg_rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
/* Turn this on if you want to see bad packets */
if (em_debug_sbp)
reg_rctl |= E1000_RCTL_SBP;
E1000_WRITE_REG(&adapter->hw, E1000_RCTL, reg_rctl);
} else if (if_getflags(ifp) & IFF_ALLMULTI) {
reg_rctl |= E1000_RCTL_MPE;
reg_rctl &= ~E1000_RCTL_UPE;
E1000_WRITE_REG(&adapter->hw, E1000_RCTL, reg_rctl);
}
}
static void
em_disable_promisc(struct adapter *adapter)
{
if_t ifp = adapter->ifp;
u32 reg_rctl;
int mcnt = 0;
reg_rctl = E1000_READ_REG(&adapter->hw, E1000_RCTL);
reg_rctl &= (~E1000_RCTL_UPE);
if (if_getflags(ifp) & IFF_ALLMULTI)
mcnt = MAX_NUM_MULTICAST_ADDRESSES;
else
mcnt = if_multiaddr_count(ifp, MAX_NUM_MULTICAST_ADDRESSES);
/* Don't disable if in MAX groups */
if (mcnt < MAX_NUM_MULTICAST_ADDRESSES)
reg_rctl &= (~E1000_RCTL_MPE);
reg_rctl &= (~E1000_RCTL_SBP);
E1000_WRITE_REG(&adapter->hw, E1000_RCTL, reg_rctl);
}
/*********************************************************************
* Multicast Update
*
* This routine is called whenever multicast address list is updated.
*
**********************************************************************/
static void
em_set_multi(struct adapter *adapter)
{
if_t ifp = adapter->ifp;
u32 reg_rctl = 0;
u8 *mta; /* Multicast array memory */
int mcnt = 0;
IOCTL_DEBUGOUT("em_set_multi: begin");
mta = adapter->mta;
bzero(mta, sizeof(u8) * ETH_ADDR_LEN * MAX_NUM_MULTICAST_ADDRESSES);
if (adapter->hw.mac.type == e1000_82542 &&
adapter->hw.revision_id == E1000_REVISION_2) {
reg_rctl = E1000_READ_REG(&adapter->hw, E1000_RCTL);
if (adapter->hw.bus.pci_cmd_word & CMD_MEM_WRT_INVALIDATE)
e1000_pci_clear_mwi(&adapter->hw);
reg_rctl |= E1000_RCTL_RST;
E1000_WRITE_REG(&adapter->hw, E1000_RCTL, reg_rctl);
msec_delay(5);
}
if_multiaddr_array(ifp, mta, &mcnt, MAX_NUM_MULTICAST_ADDRESSES);
if (mcnt >= MAX_NUM_MULTICAST_ADDRESSES) {
reg_rctl = E1000_READ_REG(&adapter->hw, E1000_RCTL);
reg_rctl |= E1000_RCTL_MPE;
E1000_WRITE_REG(&adapter->hw, E1000_RCTL, reg_rctl);
} else
e1000_update_mc_addr_list(&adapter->hw, mta, mcnt);
if (adapter->hw.mac.type == e1000_82542 &&
adapter->hw.revision_id == E1000_REVISION_2) {
reg_rctl = E1000_READ_REG(&adapter->hw, E1000_RCTL);
reg_rctl &= ~E1000_RCTL_RST;
E1000_WRITE_REG(&adapter->hw, E1000_RCTL, reg_rctl);
msec_delay(5);
if (adapter->hw.bus.pci_cmd_word & CMD_MEM_WRT_INVALIDATE)
e1000_pci_set_mwi(&adapter->hw);
}
}
/*********************************************************************
* Timer routine
*
* This routine checks for link status and updates statistics.
*
**********************************************************************/
static void
em_local_timer(void *arg)
{
struct adapter *adapter = arg;
if_t ifp = adapter->ifp;
struct tx_ring *txr = adapter->tx_rings;
struct rx_ring *rxr = adapter->rx_rings;
u32 trigger = 0;
EM_CORE_LOCK_ASSERT(adapter);
em_update_link_status(adapter);
em_update_stats_counters(adapter);
/* Reset LAA into RAR[0] on 82571 */
if ((adapter->hw.mac.type == e1000_82571) &&
e1000_get_laa_state_82571(&adapter->hw))
e1000_rar_set(&adapter->hw, adapter->hw.mac.addr, 0);
/* Mask to use in the irq trigger */
if (adapter->msix_mem) {
for (int i = 0; i < adapter->num_queues; i++, rxr++)
trigger |= rxr->ims;
rxr = adapter->rx_rings;
} else
trigger = E1000_ICS_RXDMT0;
/*
** Check on the state of the TX queue(s), this
** can be done without the lock because its RO
** and the HUNG state will be static if set.
*/
for (int i = 0; i < adapter->num_queues; i++, txr++) {
if (txr->busy == EM_TX_HUNG)
goto hung;
if (txr->busy >= EM_TX_MAXTRIES)
txr->busy = EM_TX_HUNG;
/* Schedule a TX tasklet if needed */
if (txr->tx_avail <= EM_MAX_SCATTER)
taskqueue_enqueue(txr->tq, &txr->tx_task);
}
callout_reset(&adapter->timer, hz, em_local_timer, adapter);
#ifndef DEVICE_POLLING
/* Trigger an RX interrupt to guarantee mbuf refresh */
E1000_WRITE_REG(&adapter->hw, E1000_ICS, trigger);
#endif
return;
hung:
/* Looks like we're hung */
device_printf(adapter->dev, "Watchdog timeout Queue[%d]-- resetting\n",
txr->me);
em_print_debug_info(adapter);
if_setdrvflagbits(ifp, 0, IFF_DRV_RUNNING);
adapter->watchdog_events++;
em_init_locked(adapter);
}
static void
em_update_link_status(struct adapter *adapter)
{
struct e1000_hw *hw = &adapter->hw;
if_t ifp = adapter->ifp;
device_t dev = adapter->dev;
struct tx_ring *txr = adapter->tx_rings;
u32 link_check = 0;
/* Get the cached link value or read phy for real */
switch (hw->phy.media_type) {
case e1000_media_type_copper:
if (hw->mac.get_link_status) {
/* Do the work to read phy */
e1000_check_for_link(hw);
link_check = !hw->mac.get_link_status;
if (link_check) /* ESB2 fix */
e1000_cfg_on_link_up(hw);
} else
link_check = TRUE;
break;
case e1000_media_type_fiber:
e1000_check_for_link(hw);
link_check = (E1000_READ_REG(hw, E1000_STATUS) &
E1000_STATUS_LU);
break;
case e1000_media_type_internal_serdes:
e1000_check_for_link(hw);
link_check = adapter->hw.mac.serdes_has_link;
break;
default:
case e1000_media_type_unknown:
break;
}
/* Now check for a transition */
if (link_check && (adapter->link_active == 0)) {
e1000_get_speed_and_duplex(hw, &adapter->link_speed,
&adapter->link_duplex);
/* Check if we must disable SPEED_MODE bit on PCI-E */
if ((adapter->link_speed != SPEED_1000) &&
((hw->mac.type == e1000_82571) ||
(hw->mac.type == e1000_82572))) {
int tarc0;
tarc0 = E1000_READ_REG(hw, E1000_TARC(0));
tarc0 &= ~TARC_SPEED_MODE_BIT;
E1000_WRITE_REG(hw, E1000_TARC(0), tarc0);
}
if (bootverbose)
device_printf(dev, "Link is up %d Mbps %s\n",
adapter->link_speed,
((adapter->link_duplex == FULL_DUPLEX) ?
"Full Duplex" : "Half Duplex"));
adapter->link_active = 1;
adapter->smartspeed = 0;
if_setbaudrate(ifp, adapter->link_speed * 1000000);
if_link_state_change(ifp, LINK_STATE_UP);
} else if (!link_check && (adapter->link_active == 1)) {
if_setbaudrate(ifp, 0);
adapter->link_speed = 0;
adapter->link_duplex = 0;
if (bootverbose)
device_printf(dev, "Link is Down\n");
adapter->link_active = 0;
/* Link down, disable hang detection */
for (int i = 0; i < adapter->num_queues; i++, txr++)
txr->busy = EM_TX_IDLE;
if_link_state_change(ifp, LINK_STATE_DOWN);
}
}
/*********************************************************************
*
* This routine disables all traffic on the adapter by issuing a
* global reset on the MAC and deallocates TX/RX buffers.
*
* This routine should always be called with BOTH the CORE
* and TX locks.
**********************************************************************/
static void
em_stop(void *arg)
{
struct adapter *adapter = arg;
if_t ifp = adapter->ifp;
struct tx_ring *txr = adapter->tx_rings;
EM_CORE_LOCK_ASSERT(adapter);
INIT_DEBUGOUT("em_stop: begin");
em_disable_intr(adapter);
callout_stop(&adapter->timer);
/* Tell the stack that the interface is no longer active */
if_setdrvflagbits(ifp, IFF_DRV_OACTIVE, IFF_DRV_RUNNING);
/* Disarm Hang Detection. */
for (int i = 0; i < adapter->num_queues; i++, txr++) {
EM_TX_LOCK(txr);
txr->busy = EM_TX_IDLE;
EM_TX_UNLOCK(txr);
}
e1000_reset_hw(&adapter->hw);
E1000_WRITE_REG(&adapter->hw, E1000_WUC, 0);
e1000_led_off(&adapter->hw);
e1000_cleanup_led(&adapter->hw);
}
/*********************************************************************
*
* Determine hardware revision.
*
**********************************************************************/
static void
em_identify_hardware(struct adapter *adapter)
{
device_t dev = adapter->dev;
/* Make sure our PCI config space has the necessary stuff set */
pci_enable_busmaster(dev);
adapter->hw.bus.pci_cmd_word = pci_read_config(dev, PCIR_COMMAND, 2);
/* Save off the information about this board */
adapter->hw.vendor_id = pci_get_vendor(dev);
adapter->hw.device_id = pci_get_device(dev);
adapter->hw.revision_id = pci_read_config(dev, PCIR_REVID, 1);
adapter->hw.subsystem_vendor_id =
pci_read_config(dev, PCIR_SUBVEND_0, 2);
adapter->hw.subsystem_device_id =
pci_read_config(dev, PCIR_SUBDEV_0, 2);
/* Do Shared Code Init and Setup */
if (e1000_set_mac_type(&adapter->hw)) {
device_printf(dev, "Setup init failure\n");
return;
}
}
static int
em_allocate_pci_resources(struct adapter *adapter)
{
device_t dev = adapter->dev;
int rid;
rid = PCIR_BAR(0);
adapter->memory = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
&rid, RF_ACTIVE);
if (adapter->memory == NULL) {
device_printf(dev, "Unable to allocate bus resource: memory\n");
return (ENXIO);
}
adapter->osdep.mem_bus_space_tag =
rman_get_bustag(adapter->memory);
adapter->osdep.mem_bus_space_handle =
rman_get_bushandle(adapter->memory);
adapter->hw.hw_addr = (u8 *)&adapter->osdep.mem_bus_space_handle;
adapter->hw.back = &adapter->osdep;
return (0);
}
/*********************************************************************
*
* Setup the Legacy or MSI Interrupt handler
*
**********************************************************************/
int
em_allocate_legacy(struct adapter *adapter)
{
device_t dev = adapter->dev;
struct tx_ring *txr = adapter->tx_rings;
int error, rid = 0;
/* Manually turn off all interrupts */
E1000_WRITE_REG(&adapter->hw, E1000_IMC, 0xffffffff);
if (adapter->msix == 1) /* using MSI */
rid = 1;
/* We allocate a single interrupt resource */
adapter->res = bus_alloc_resource_any(dev,
SYS_RES_IRQ, &rid, RF_SHAREABLE | RF_ACTIVE);
if (adapter->res == NULL) {
device_printf(dev, "Unable to allocate bus resource: "
"interrupt\n");
return (ENXIO);
}
/*
* Allocate a fast interrupt and the associated
* deferred processing contexts.
*/
TASK_INIT(&adapter->que_task, 0, em_handle_que, adapter);
adapter->tq = taskqueue_create_fast("em_taskq", M_NOWAIT,
taskqueue_thread_enqueue, &adapter->tq);
taskqueue_start_threads(&adapter->tq, 1, PI_NET, "%s que",
device_get_nameunit(adapter->dev));
/* Use a TX only tasklet for local timer */
TASK_INIT(&txr->tx_task, 0, em_handle_tx, txr);
txr->tq = taskqueue_create_fast("em_txq", M_NOWAIT,
taskqueue_thread_enqueue, &txr->tq);
taskqueue_start_threads(&txr->tq, 1, PI_NET, "%s txq",
device_get_nameunit(adapter->dev));
TASK_INIT(&adapter->link_task, 0, em_handle_link, adapter);
if ((error = bus_setup_intr(dev, adapter->res, INTR_TYPE_NET,
em_irq_fast, NULL, adapter, &adapter->tag)) != 0) {
device_printf(dev, "Failed to register fast interrupt "
"handler: %d\n", error);
taskqueue_free(adapter->tq);
adapter->tq = NULL;
return (error);
}
return (0);
}
/*********************************************************************
*
* Setup the MSIX Interrupt handlers
* This is not really Multiqueue, rather
* its just seperate interrupt vectors
* for TX, RX, and Link.
*
**********************************************************************/
int
em_allocate_msix(struct adapter *adapter)
{
device_t dev = adapter->dev;
struct tx_ring *txr = adapter->tx_rings;
struct rx_ring *rxr = adapter->rx_rings;
int error, rid, vector = 0;
int cpu_id = 0;
/* Make sure all interrupts are disabled */
E1000_WRITE_REG(&adapter->hw, E1000_IMC, 0xffffffff);
/* First set up ring resources */
for (int i = 0; i < adapter->num_queues; i++, rxr++, vector++) {
/* RX ring */
rid = vector + 1;
rxr->res = bus_alloc_resource_any(dev,
SYS_RES_IRQ, &rid, RF_ACTIVE);
if (rxr->res == NULL) {
device_printf(dev,
"Unable to allocate bus resource: "
"RX MSIX Interrupt %d\n", i);
return (ENXIO);
}
if ((error = bus_setup_intr(dev, rxr->res,
INTR_TYPE_NET | INTR_MPSAFE, NULL, em_msix_rx,
rxr, &rxr->tag)) != 0) {
device_printf(dev, "Failed to register RX handler");
return (error);
}
#if __FreeBSD_version >= 800504
bus_describe_intr(dev, rxr->res, rxr->tag, "rx%d", i);
#endif
rxr->msix = vector;
if (em_last_bind_cpu < 0)
em_last_bind_cpu = CPU_FIRST();
cpu_id = em_last_bind_cpu;
bus_bind_intr(dev, rxr->res, cpu_id);
TASK_INIT(&rxr->rx_task, 0, em_handle_rx, rxr);
rxr->tq = taskqueue_create_fast("em_rxq", M_NOWAIT,
taskqueue_thread_enqueue, &rxr->tq);
taskqueue_start_threads(&rxr->tq, 1, PI_NET, "%s rxq (cpuid %d)",
device_get_nameunit(adapter->dev), cpu_id);
/*
** Set the bit to enable interrupt
** in E1000_IMS -- bits 20 and 21
** are for RX0 and RX1, note this has
** NOTHING to do with the MSIX vector
*/
rxr->ims = 1 << (20 + i);
adapter->ims |= rxr->ims;
adapter->ivars |= (8 | rxr->msix) << (i * 4);
em_last_bind_cpu = CPU_NEXT(em_last_bind_cpu);
}
for (int i = 0; i < adapter->num_queues; i++, txr++, vector++) {
/* TX ring */
rid = vector + 1;
txr->res = bus_alloc_resource_any(dev,
SYS_RES_IRQ, &rid, RF_ACTIVE);
if (txr->res == NULL) {
device_printf(dev,
"Unable to allocate bus resource: "
"TX MSIX Interrupt %d\n", i);
return (ENXIO);
}
if ((error = bus_setup_intr(dev, txr->res,
INTR_TYPE_NET | INTR_MPSAFE, NULL, em_msix_tx,
txr, &txr->tag)) != 0) {
device_printf(dev, "Failed to register TX handler");
return (error);
}
#if __FreeBSD_version >= 800504
bus_describe_intr(dev, txr->res, txr->tag, "tx%d", i);
#endif
txr->msix = vector;
if (em_last_bind_cpu < 0)
em_last_bind_cpu = CPU_FIRST();
cpu_id = em_last_bind_cpu;
bus_bind_intr(dev, txr->res, cpu_id);
TASK_INIT(&txr->tx_task, 0, em_handle_tx, txr);
txr->tq = taskqueue_create_fast("em_txq", M_NOWAIT,
taskqueue_thread_enqueue, &txr->tq);
taskqueue_start_threads(&txr->tq, 1, PI_NET, "%s txq (cpuid %d)",
device_get_nameunit(adapter->dev), cpu_id);
/*
** Set the bit to enable interrupt
** in E1000_IMS -- bits 22 and 23
** are for TX0 and TX1, note this has
** NOTHING to do with the MSIX vector
*/
txr->ims = 1 << (22 + i);
adapter->ims |= txr->ims;
adapter->ivars |= (8 | txr->msix) << (8 + (i * 4));
em_last_bind_cpu = CPU_NEXT(em_last_bind_cpu);
}
/* Link interrupt */
rid = vector + 1;
adapter->res = bus_alloc_resource_any(dev,
SYS_RES_IRQ, &rid, RF_SHAREABLE | RF_ACTIVE);
if (!adapter->res) {
device_printf(dev,"Unable to allocate "
"bus resource: Link interrupt [%d]\n", rid);
return (ENXIO);
}
/* Set the link handler function */
error = bus_setup_intr(dev, adapter->res,
INTR_TYPE_NET | INTR_MPSAFE, NULL,
em_msix_link, adapter, &adapter->tag);
if (error) {
adapter->res = NULL;
device_printf(dev, "Failed to register LINK handler");
return (error);
}
#if __FreeBSD_version >= 800504
bus_describe_intr(dev, adapter->res, adapter->tag, "link");
#endif
adapter->linkvec = vector;
adapter->ivars |= (8 | vector) << 16;
adapter->ivars |= 0x80000000;
return (0);
}
static void
em_free_pci_resources(struct adapter *adapter)
{
device_t dev = adapter->dev;
struct tx_ring *txr;
struct rx_ring *rxr;
int rid;
/*
** Release all the queue interrupt resources:
*/
for (int i = 0; i < adapter->num_queues; i++) {
txr = &adapter->tx_rings[i];
/* an early abort? */
if (txr == NULL)
break;
rid = txr->msix +1;
if (txr->tag != NULL) {
bus_teardown_intr(dev, txr->res, txr->tag);
txr->tag = NULL;
}
if (txr->res != NULL)
bus_release_resource(dev, SYS_RES_IRQ,
rid, txr->res);
rxr = &adapter->rx_rings[i];
/* an early abort? */
if (rxr == NULL)
break;
rid = rxr->msix +1;
if (rxr->tag != NULL) {
bus_teardown_intr(dev, rxr->res, rxr->tag);
rxr->tag = NULL;
}
if (rxr->res != NULL)
bus_release_resource(dev, SYS_RES_IRQ,
rid, rxr->res);
}
if (adapter->linkvec) /* we are doing MSIX */
rid = adapter->linkvec + 1;
else
(adapter->msix != 0) ? (rid = 1):(rid = 0);
if (adapter->tag != NULL) {
bus_teardown_intr(dev, adapter->res, adapter->tag);
adapter->tag = NULL;
}
if (adapter->res != NULL)
bus_release_resource(dev, SYS_RES_IRQ, rid, adapter->res);
if (adapter->msix)
pci_release_msi(dev);
if (adapter->msix_mem != NULL)
bus_release_resource(dev, SYS_RES_MEMORY,
PCIR_BAR(EM_MSIX_BAR), adapter->msix_mem);
if (adapter->memory != NULL)
bus_release_resource(dev, SYS_RES_MEMORY,
PCIR_BAR(0), adapter->memory);
if (adapter->flash != NULL)
bus_release_resource(dev, SYS_RES_MEMORY,
EM_FLASH, adapter->flash);
}
/*
* Setup MSI or MSI/X
*/
static int
em_setup_msix(struct adapter *adapter)
{
device_t dev = adapter->dev;
int val;
/* Nearly always going to use one queue */
adapter->num_queues = 1;
/*
** Try using MSI-X for Hartwell adapters
*/
if ((adapter->hw.mac.type == e1000_82574) &&
(em_enable_msix == TRUE)) {
#ifdef EM_MULTIQUEUE
adapter->num_queues = (em_num_queues == 1) ? 1 : 2;
if (adapter->num_queues > 1)
em_enable_vectors_82574(adapter);
#endif
/* Map the MSIX BAR */
int rid = PCIR_BAR(EM_MSIX_BAR);
adapter->msix_mem = bus_alloc_resource_any(dev,
SYS_RES_MEMORY, &rid, RF_ACTIVE);
if (adapter->msix_mem == NULL) {
/* May not be enabled */
device_printf(adapter->dev,
"Unable to map MSIX table \n");
goto msi;
}
val = pci_msix_count(dev);
#ifdef EM_MULTIQUEUE
/* We need 5 vectors in the multiqueue case */
if (adapter->num_queues > 1 ) {
if (val >= 5)
val = 5;
else {
adapter->num_queues = 1;
device_printf(adapter->dev,
"Insufficient MSIX vectors for >1 queue, "
"using single queue...\n");
goto msix_one;
}
} else {
msix_one:
#endif
if (val >= 3)
val = 3;
else {
device_printf(adapter->dev,
"Insufficient MSIX vectors, using MSI\n");
goto msi;
}
#ifdef EM_MULTIQUEUE
}
#endif
if ((pci_alloc_msix(dev, &val) == 0)) {
device_printf(adapter->dev,
"Using MSIX interrupts "
"with %d vectors\n", val);
return (val);
}
/*
** If MSIX alloc failed or provided us with
** less than needed, free and fall through to MSI
*/
pci_release_msi(dev);
}
msi:
if (adapter->msix_mem != NULL) {
bus_release_resource(dev, SYS_RES_MEMORY,
PCIR_BAR(EM_MSIX_BAR), adapter->msix_mem);
adapter->msix_mem = NULL;
}
val = 1;
if (pci_alloc_msi(dev, &val) == 0) {
device_printf(adapter->dev, "Using an MSI interrupt\n");
return (val);
}
/* Should only happen due to manual configuration */
device_printf(adapter->dev,"No MSI/MSIX using a Legacy IRQ\n");
return (0);
}
/*********************************************************************
*
* Initialize the hardware to a configuration
* as specified by the adapter structure.
*
**********************************************************************/
static void
em_reset(struct adapter *adapter)
{
device_t dev = adapter->dev;
if_t ifp = adapter->ifp;
struct e1000_hw *hw = &adapter->hw;
u16 rx_buffer_size;
u32 pba;
INIT_DEBUGOUT("em_reset: begin");
/* Set up smart power down as default off on newer adapters. */
if (!em_smart_pwr_down && (hw->mac.type == e1000_82571 ||
hw->mac.type == e1000_82572)) {
u16 phy_tmp = 0;
/* Speed up time to link by disabling smart power down. */
e1000_read_phy_reg(hw, IGP02E1000_PHY_POWER_MGMT, &phy_tmp);
phy_tmp &= ~IGP02E1000_PM_SPD;
e1000_write_phy_reg(hw, IGP02E1000_PHY_POWER_MGMT, phy_tmp);
}
/*
* Packet Buffer Allocation (PBA)
* Writing PBA sets the receive portion of the buffer
* the remainder is used for the transmit buffer.
*/
switch (hw->mac.type) {
/* Total Packet Buffer on these is 48K */
case e1000_82571:
case e1000_82572:
case e1000_80003es2lan:
pba = E1000_PBA_32K; /* 32K for Rx, 16K for Tx */
break;
case e1000_82573: /* 82573: Total Packet Buffer is 32K */
pba = E1000_PBA_12K; /* 12K for Rx, 20K for Tx */
break;
case e1000_82574:
case e1000_82583:
pba = E1000_PBA_20K; /* 20K for Rx, 20K for Tx */
break;
case e1000_ich8lan:
pba = E1000_PBA_8K;
break;
case e1000_ich9lan:
case e1000_ich10lan:
/* Boost Receive side for jumbo frames */
if (adapter->hw.mac.max_frame_size > 4096)
pba = E1000_PBA_14K;
else
pba = E1000_PBA_10K;
break;
case e1000_pchlan:
case e1000_pch2lan:
case e1000_pch_lpt:
pba = E1000_PBA_26K;
break;
default:
if (adapter->hw.mac.max_frame_size > 8192)
pba = E1000_PBA_40K; /* 40K for Rx, 24K for Tx */
else
pba = E1000_PBA_48K; /* 48K for Rx, 16K for Tx */
}
E1000_WRITE_REG(&adapter->hw, E1000_PBA, pba);
/*
* These parameters control the automatic generation (Tx) and
* response (Rx) to Ethernet PAUSE frames.
* - High water mark should allow for at least two frames to be
* received after sending an XOFF.
* - Low water mark works best when it is very near the high water mark.
* This allows the receiver to restart by sending XON when it has
* drained a bit. Here we use an arbitary value of 1500 which will
* restart after one full frame is pulled from the buffer. There
* could be several smaller frames in the buffer and if so they will
* not trigger the XON until their total number reduces the buffer
* by 1500.
* - The pause time is fairly large at 1000 x 512ns = 512 usec.
*/
rx_buffer_size = ((E1000_READ_REG(hw, E1000_PBA) & 0xffff) << 10 );
hw->fc.high_water = rx_buffer_size -
roundup2(adapter->hw.mac.max_frame_size, 1024);
hw->fc.low_water = hw->fc.high_water - 1500;
if (adapter->fc) /* locally set flow control value? */
hw->fc.requested_mode = adapter->fc;
else
hw->fc.requested_mode = e1000_fc_full;
if (hw->mac.type == e1000_80003es2lan)
hw->fc.pause_time = 0xFFFF;
else
hw->fc.pause_time = EM_FC_PAUSE_TIME;
hw->fc.send_xon = TRUE;
/* Device specific overrides/settings */
switch (hw->mac.type) {
case e1000_pchlan:
/* Workaround: no TX flow ctrl for PCH */
hw->fc.requested_mode = e1000_fc_rx_pause;
hw->fc.pause_time = 0xFFFF; /* override */
if (if_getmtu(ifp) > ETHERMTU) {
hw->fc.high_water = 0x3500;
hw->fc.low_water = 0x1500;
} else {
hw->fc.high_water = 0x5000;
hw->fc.low_water = 0x3000;
}
hw->fc.refresh_time = 0x1000;
break;
case e1000_pch2lan:
case e1000_pch_lpt:
hw->fc.high_water = 0x5C20;
hw->fc.low_water = 0x5048;
hw->fc.pause_time = 0x0650;
hw->fc.refresh_time = 0x0400;
/* Jumbos need adjusted PBA */
if (if_getmtu(ifp) > ETHERMTU)
E1000_WRITE_REG(hw, E1000_PBA, 12);
else
E1000_WRITE_REG(hw, E1000_PBA, 26);
break;
case e1000_ich9lan:
case e1000_ich10lan:
if (if_getmtu(ifp) > ETHERMTU) {
hw->fc.high_water = 0x2800;
hw->fc.low_water = hw->fc.high_water - 8;
break;
}
/* else fall thru */
default:
if (hw->mac.type == e1000_80003es2lan)
hw->fc.pause_time = 0xFFFF;
break;
}
/* Issue a global reset */
e1000_reset_hw(hw);
E1000_WRITE_REG(hw, E1000_WUC, 0);
em_disable_aspm(adapter);
/* and a re-init */
if (e1000_init_hw(hw) < 0) {
device_printf(dev, "Hardware Initialization Failed\n");
return;
}
E1000_WRITE_REG(hw, E1000_VET, ETHERTYPE_VLAN);
e1000_get_phy_info(hw);
e1000_check_for_link(hw);
return;
}
/*********************************************************************
*
* Setup networking device structure and register an interface.
*
**********************************************************************/
static int
em_setup_interface(device_t dev, struct adapter *adapter)
{
if_t ifp;
INIT_DEBUGOUT("em_setup_interface: begin");
ifp = adapter->ifp = if_gethandle(IFT_ETHER);
if (ifp == 0) {
device_printf(dev, "can not allocate ifnet structure\n");
return (-1);
}
if_initname(ifp, device_get_name(dev), device_get_unit(dev));
if_setdev(ifp, dev);
if_setinitfn(ifp, em_init);
if_setsoftc(ifp, adapter);
if_setflags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST);
if_setioctlfn(ifp, em_ioctl);
if_setgetcounterfn(ifp, em_get_counter);
#ifdef EM_MULTIQUEUE
/* Multiqueue stack interface */
if_settransmitfn(ifp, em_mq_start);
if_setqflushfn(ifp, em_qflush);
#else
if_setstartfn(ifp, em_start);
if_setsendqlen(ifp, adapter->num_tx_desc - 1);
if_setsendqready(ifp);
#endif
ether_ifattach(ifp, adapter->hw.mac.addr);
if_setcapabilities(ifp, 0);
if_setcapenable(ifp, 0);
if_setcapabilitiesbit(ifp, IFCAP_HWCSUM | IFCAP_VLAN_HWCSUM |
IFCAP_TSO4, 0);
/*
* Tell the upper layer(s) we
* support full VLAN capability
*/
if_setifheaderlen(ifp, sizeof(struct ether_vlan_header));
if_setcapabilitiesbit(ifp, IFCAP_VLAN_HWTAGGING | IFCAP_VLAN_HWTSO |
IFCAP_VLAN_MTU, 0);
if_setcapenable(ifp, if_getcapabilities(ifp));
/*
** Don't turn this on by default, if vlans are
** created on another pseudo device (eg. lagg)
** then vlan events are not passed thru, breaking
** operation, but with HW FILTER off it works. If
** using vlans directly on the em driver you can
** enable this and get full hardware tag filtering.
*/
if_setcapabilitiesbit(ifp, IFCAP_VLAN_HWFILTER,0);
#ifdef DEVICE_POLLING
if_setcapabilitiesbit(ifp, IFCAP_POLLING,0);
#endif
/* Enable only WOL MAGIC by default */
if (adapter->wol) {
if_setcapabilitiesbit(ifp, IFCAP_WOL, 0);
if_setcapenablebit(ifp, IFCAP_WOL_MAGIC, 0);
}
/*
* Specify the media types supported by this adapter and register
* callbacks to update media and link information
*/
ifmedia_init(&adapter->media, IFM_IMASK,
em_media_change, em_media_status);
if ((adapter->hw.phy.media_type == e1000_media_type_fiber) ||
(adapter->hw.phy.media_type == e1000_media_type_internal_serdes)) {
u_char fiber_type = IFM_1000_SX; /* default type */
ifmedia_add(&adapter->media, IFM_ETHER | fiber_type | IFM_FDX,
0, NULL);
ifmedia_add(&adapter->media, IFM_ETHER | fiber_type, 0, NULL);
} else {
ifmedia_add(&adapter->media, IFM_ETHER | IFM_10_T, 0, NULL);
ifmedia_add(&adapter->media, IFM_ETHER | IFM_10_T | IFM_FDX,
0, NULL);
ifmedia_add(&adapter->media, IFM_ETHER | IFM_100_TX,
0, NULL);
ifmedia_add(&adapter->media, IFM_ETHER | IFM_100_TX | IFM_FDX,
0, NULL);
if (adapter->hw.phy.type != e1000_phy_ife) {
ifmedia_add(&adapter->media,
IFM_ETHER | IFM_1000_T | IFM_FDX, 0, NULL);
ifmedia_add(&adapter->media,
IFM_ETHER | IFM_1000_T, 0, NULL);
}
}
ifmedia_add(&adapter->media, IFM_ETHER | IFM_AUTO, 0, NULL);
ifmedia_set(&adapter->media, IFM_ETHER | IFM_AUTO);
return (0);
}
/*
* Manage DMA'able memory.
*/
static void
em_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
{
if (error)
return;
*(bus_addr_t *) arg = segs[0].ds_addr;
}
static int
em_dma_malloc(struct adapter *adapter, bus_size_t size,
struct em_dma_alloc *dma, int mapflags)
{
int error;
error = bus_dma_tag_create(bus_get_dma_tag(adapter->dev), /* parent */
EM_DBA_ALIGN, 0, /* alignment, bounds */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
size, /* maxsize */
1, /* nsegments */
size, /* maxsegsize */
0, /* flags */
NULL, /* lockfunc */
NULL, /* lockarg */
&dma->dma_tag);
if (error) {
device_printf(adapter->dev,
"%s: bus_dma_tag_create failed: %d\n",
__func__, error);
goto fail_0;
}
error = bus_dmamem_alloc(dma->dma_tag, (void**) &dma->dma_vaddr,
BUS_DMA_NOWAIT | BUS_DMA_COHERENT, &dma->dma_map);
if (error) {
device_printf(adapter->dev,
"%s: bus_dmamem_alloc(%ju) failed: %d\n",
__func__, (uintmax_t)size, error);
goto fail_2;
}
dma->dma_paddr = 0;
error = bus_dmamap_load(dma->dma_tag, dma->dma_map, dma->dma_vaddr,
size, em_dmamap_cb, &dma->dma_paddr, mapflags | BUS_DMA_NOWAIT);
if (error || dma->dma_paddr == 0) {
device_printf(adapter->dev,
"%s: bus_dmamap_load failed: %d\n",
__func__, error);
goto fail_3;
}
return (0);
fail_3:
bus_dmamap_unload(dma->dma_tag, dma->dma_map);
fail_2:
bus_dmamem_free(dma->dma_tag, dma->dma_vaddr, dma->dma_map);
bus_dma_tag_destroy(dma->dma_tag);
fail_0:
dma->dma_tag = NULL;
return (error);
}
static void
em_dma_free(struct adapter *adapter, struct em_dma_alloc *dma)
{
if (dma->dma_tag == NULL)
return;
if (dma->dma_paddr != 0) {
bus_dmamap_sync(dma->dma_tag, dma->dma_map,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(dma->dma_tag, dma->dma_map);
dma->dma_paddr = 0;
}
if (dma->dma_vaddr != NULL) {
bus_dmamem_free(dma->dma_tag, dma->dma_vaddr, dma->dma_map);
dma->dma_vaddr = NULL;
}
bus_dma_tag_destroy(dma->dma_tag);
dma->dma_tag = NULL;
}
/*********************************************************************
*
* Allocate memory for the transmit and receive rings, and then
* the descriptors associated with each, called only once at attach.
*
**********************************************************************/
static int
em_allocate_queues(struct adapter *adapter)
{
device_t dev = adapter->dev;
struct tx_ring *txr = NULL;
struct rx_ring *rxr = NULL;
int rsize, tsize, error = E1000_SUCCESS;
int txconf = 0, rxconf = 0;
/* Allocate the TX ring struct memory */
if (!(adapter->tx_rings =
(struct tx_ring *) malloc(sizeof(struct tx_ring) *
adapter->num_queues, M_DEVBUF, M_NOWAIT | M_ZERO))) {
device_printf(dev, "Unable to allocate TX ring memory\n");
error = ENOMEM;
goto fail;
}
/* Now allocate the RX */
if (!(adapter->rx_rings =
(struct rx_ring *) malloc(sizeof(struct rx_ring) *
adapter->num_queues, M_DEVBUF, M_NOWAIT | M_ZERO))) {
device_printf(dev, "Unable to allocate RX ring memory\n");
error = ENOMEM;
goto rx_fail;
}
tsize = roundup2(adapter->num_tx_desc *
sizeof(struct e1000_tx_desc), EM_DBA_ALIGN);
/*
* Now set up the TX queues, txconf is needed to handle the
* possibility that things fail midcourse and we need to
* undo memory gracefully
*/
for (int i = 0; i < adapter->num_queues; i++, txconf++) {
/* Set up some basics */
txr = &adapter->tx_rings[i];
txr->adapter = adapter;
txr->me = i;
/* Initialize the TX lock */
snprintf(txr->mtx_name, sizeof(txr->mtx_name), "%s:tx(%d)",
device_get_nameunit(dev), txr->me);
mtx_init(&txr->tx_mtx, txr->mtx_name, NULL, MTX_DEF);
if (em_dma_malloc(adapter, tsize,
&txr->txdma, BUS_DMA_NOWAIT)) {
device_printf(dev,
"Unable to allocate TX Descriptor memory\n");
error = ENOMEM;
goto err_tx_desc;
}
txr->tx_base = (struct e1000_tx_desc *)txr->txdma.dma_vaddr;
bzero((void *)txr->tx_base, tsize);
if (em_allocate_transmit_buffers(txr)) {
device_printf(dev,
"Critical Failure setting up transmit buffers\n");
error = ENOMEM;
goto err_tx_desc;
}
#if __FreeBSD_version >= 800000
/* Allocate a buf ring */
txr->br = buf_ring_alloc(4096, M_DEVBUF,
M_WAITOK, &txr->tx_mtx);
#endif
}
/*
* Next the RX queues...
*/
rsize = roundup2(adapter->num_rx_desc *
sizeof(struct e1000_rx_desc), EM_DBA_ALIGN);
for (int i = 0; i < adapter->num_queues; i++, rxconf++) {
rxr = &adapter->rx_rings[i];
rxr->adapter = adapter;
rxr->me = i;
/* Initialize the RX lock */
snprintf(rxr->mtx_name, sizeof(rxr->mtx_name), "%s:rx(%d)",
device_get_nameunit(dev), txr->me);
mtx_init(&rxr->rx_mtx, rxr->mtx_name, NULL, MTX_DEF);
if (em_dma_malloc(adapter, rsize,
&rxr->rxdma, BUS_DMA_NOWAIT)) {
device_printf(dev,
"Unable to allocate RxDescriptor memory\n");
error = ENOMEM;
goto err_rx_desc;
}
rxr->rx_base = (struct e1000_rx_desc *)rxr->rxdma.dma_vaddr;
bzero((void *)rxr->rx_base, rsize);
/* Allocate receive buffers for the ring*/
if (em_allocate_receive_buffers(rxr)) {
device_printf(dev,
"Critical Failure setting up receive buffers\n");
error = ENOMEM;
goto err_rx_desc;
}
}
return (0);
err_rx_desc:
for (rxr = adapter->rx_rings; rxconf > 0; rxr++, rxconf--)
em_dma_free(adapter, &rxr->rxdma);
err_tx_desc:
for (txr = adapter->tx_rings; txconf > 0; txr++, txconf--)
em_dma_free(adapter, &txr->txdma);
free(adapter->rx_rings, M_DEVBUF);
rx_fail:
#if __FreeBSD_version >= 800000
buf_ring_free(txr->br, M_DEVBUF);
#endif
free(adapter->tx_rings, M_DEVBUF);
fail:
return (error);
}
/*********************************************************************
*
* Allocate memory for tx_buffer structures. The tx_buffer stores all
* the information needed to transmit a packet on the wire. This is
* called only once at attach, setup is done every reset.
*
**********************************************************************/
static int
em_allocate_transmit_buffers(struct tx_ring *txr)
{
struct adapter *adapter = txr->adapter;
device_t dev = adapter->dev;
struct em_buffer *txbuf;
int error, i;
/*
* Setup DMA descriptor areas.
*/
if ((error = bus_dma_tag_create(bus_get_dma_tag(dev),
1, 0, /* alignment, bounds */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
EM_TSO_SIZE, /* maxsize */
EM_MAX_SCATTER, /* nsegments */
PAGE_SIZE, /* maxsegsize */
0, /* flags */
NULL, /* lockfunc */
NULL, /* lockfuncarg */
&txr->txtag))) {
device_printf(dev,"Unable to allocate TX DMA tag\n");
goto fail;
}
if (!(txr->tx_buffers =
(struct em_buffer *) malloc(sizeof(struct em_buffer) *
adapter->num_tx_desc, M_DEVBUF, M_NOWAIT | M_ZERO))) {
device_printf(dev, "Unable to allocate tx_buffer memory\n");
error = ENOMEM;
goto fail;
}
/* Create the descriptor buffer dma maps */
txbuf = txr->tx_buffers;
for (i = 0; i < adapter->num_tx_desc; i++, txbuf++) {
error = bus_dmamap_create(txr->txtag, 0, &txbuf->map);
if (error != 0) {
device_printf(dev, "Unable to create TX DMA map\n");
goto fail;
}
}
return 0;
fail:
/* We free all, it handles case where we are in the middle */
em_free_transmit_structures(adapter);
return (error);
}
/*********************************************************************
*
* Initialize a transmit ring.
*
**********************************************************************/
static void
em_setup_transmit_ring(struct tx_ring *txr)
{
struct adapter *adapter = txr->adapter;
struct em_buffer *txbuf;
int i;
#ifdef DEV_NETMAP
struct netmap_slot *slot;
struct netmap_adapter *na = netmap_getna(adapter->ifp);
#endif /* DEV_NETMAP */
/* Clear the old descriptor contents */
EM_TX_LOCK(txr);
#ifdef DEV_NETMAP
slot = netmap_reset(na, NR_TX, txr->me, 0);
#endif /* DEV_NETMAP */
bzero((void *)txr->tx_base,
(sizeof(struct e1000_tx_desc)) * adapter->num_tx_desc);
/* Reset indices */
txr->next_avail_desc = 0;
txr->next_to_clean = 0;
/* Free any existing tx buffers. */
txbuf = txr->tx_buffers;
for (i = 0; i < adapter->num_tx_desc; i++, txbuf++) {
if (txbuf->m_head != NULL) {
bus_dmamap_sync(txr->txtag, txbuf->map,
BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(txr->txtag, txbuf->map);
m_freem(txbuf->m_head);
txbuf->m_head = NULL;
}
#ifdef DEV_NETMAP
if (slot) {
int si = netmap_idx_n2k(&na->tx_rings[txr->me], i);
uint64_t paddr;
void *addr;
addr = PNMB(na, slot + si, &paddr);
txr->tx_base[i].buffer_addr = htole64(paddr);
/* reload the map for netmap mode */
netmap_load_map(na, txr->txtag, txbuf->map, addr);
}
#endif /* DEV_NETMAP */
/* clear the watch index */
txbuf->next_eop = -1;
}
/* Set number of descriptors available */
txr->tx_avail = adapter->num_tx_desc;
txr->busy = EM_TX_IDLE;
/* Clear checksum offload context. */
txr->last_hw_offload = 0;
txr->last_hw_ipcss = 0;
txr->last_hw_ipcso = 0;
txr->last_hw_tucss = 0;
txr->last_hw_tucso = 0;
bus_dmamap_sync(txr->txdma.dma_tag, txr->txdma.dma_map,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
EM_TX_UNLOCK(txr);
}
/*********************************************************************
*
* Initialize all transmit rings.
*
**********************************************************************/
static void
em_setup_transmit_structures(struct adapter *adapter)
{
struct tx_ring *txr = adapter->tx_rings;
for (int i = 0; i < adapter->num_queues; i++, txr++)
em_setup_transmit_ring(txr);
return;
}
/*********************************************************************
*
* Enable transmit unit.
*
**********************************************************************/
static void
em_initialize_transmit_unit(struct adapter *adapter)
{
struct tx_ring *txr = adapter->tx_rings;
struct e1000_hw *hw = &adapter->hw;
u32 tctl, txdctl = 0, tarc, tipg = 0;
INIT_DEBUGOUT("em_initialize_transmit_unit: begin");
for (int i = 0; i < adapter->num_queues; i++, txr++) {
u64 bus_addr = txr->txdma.dma_paddr;
/* Base and Len of TX Ring */
E1000_WRITE_REG(hw, E1000_TDLEN(i),
adapter->num_tx_desc * sizeof(struct e1000_tx_desc));
E1000_WRITE_REG(hw, E1000_TDBAH(i),
(u32)(bus_addr >> 32));
E1000_WRITE_REG(hw, E1000_TDBAL(i),
(u32)bus_addr);
/* Init the HEAD/TAIL indices */
E1000_WRITE_REG(hw, E1000_TDT(i), 0);
E1000_WRITE_REG(hw, E1000_TDH(i), 0);
HW_DEBUGOUT2("Base = %x, Length = %x\n",
E1000_READ_REG(&adapter->hw, E1000_TDBAL(i)),
E1000_READ_REG(&adapter->hw, E1000_TDLEN(i)));
txr->busy = EM_TX_IDLE;
txdctl = 0; /* clear txdctl */
txdctl |= 0x1f; /* PTHRESH */
txdctl |= 1 << 8; /* HTHRESH */
txdctl |= 1 << 16;/* WTHRESH */
txdctl |= 1 << 22; /* Reserved bit 22 must always be 1 */
txdctl |= E1000_TXDCTL_GRAN;
txdctl |= 1 << 25; /* LWTHRESH */
E1000_WRITE_REG(hw, E1000_TXDCTL(i), txdctl);
}
/* Set the default values for the Tx Inter Packet Gap timer */
switch (adapter->hw.mac.type) {
case e1000_80003es2lan:
tipg = DEFAULT_82543_TIPG_IPGR1;
tipg |= DEFAULT_80003ES2LAN_TIPG_IPGR2 <<
E1000_TIPG_IPGR2_SHIFT;
break;
default:
if ((adapter->hw.phy.media_type == e1000_media_type_fiber) ||
(adapter->hw.phy.media_type ==
e1000_media_type_internal_serdes))
tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
else
tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
tipg |= DEFAULT_82543_TIPG_IPGR1 << E1000_TIPG_IPGR1_SHIFT;
tipg |= DEFAULT_82543_TIPG_IPGR2 << E1000_TIPG_IPGR2_SHIFT;
}
E1000_WRITE_REG(&adapter->hw, E1000_TIPG, tipg);
E1000_WRITE_REG(&adapter->hw, E1000_TIDV, adapter->tx_int_delay.value);
if(adapter->hw.mac.type >= e1000_82540)
E1000_WRITE_REG(&adapter->hw, E1000_TADV,
adapter->tx_abs_int_delay.value);
if ((adapter->hw.mac.type == e1000_82571) ||
(adapter->hw.mac.type == e1000_82572)) {
tarc = E1000_READ_REG(&adapter->hw, E1000_TARC(0));
tarc |= TARC_SPEED_MODE_BIT;
E1000_WRITE_REG(&adapter->hw, E1000_TARC(0), tarc);
} else if (adapter->hw.mac.type == e1000_80003es2lan) {
/* errata: program both queues to unweighted RR */
tarc = E1000_READ_REG(&adapter->hw, E1000_TARC(0));
tarc |= 1;
E1000_WRITE_REG(&adapter->hw, E1000_TARC(0), tarc);
tarc = E1000_READ_REG(&adapter->hw, E1000_TARC(1));
tarc |= 1;
E1000_WRITE_REG(&adapter->hw, E1000_TARC(1), tarc);
} else if (adapter->hw.mac.type == e1000_82574) {
tarc = E1000_READ_REG(&adapter->hw, E1000_TARC(0));
tarc |= TARC_ERRATA_BIT;
if ( adapter->num_queues > 1) {
tarc |= (TARC_COMPENSATION_MODE | TARC_MQ_FIX);
E1000_WRITE_REG(&adapter->hw, E1000_TARC(0), tarc);
E1000_WRITE_REG(&adapter->hw, E1000_TARC(1), tarc);
} else
E1000_WRITE_REG(&adapter->hw, E1000_TARC(0), tarc);
}
adapter->txd_cmd = E1000_TXD_CMD_IFCS;
if (adapter->tx_int_delay.value > 0)
adapter->txd_cmd |= E1000_TXD_CMD_IDE;
/* Program the Transmit Control Register */
tctl = E1000_READ_REG(&adapter->hw, E1000_TCTL);
tctl &= ~E1000_TCTL_CT;
tctl |= (E1000_TCTL_PSP | E1000_TCTL_RTLC | E1000_TCTL_EN |
(E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT));
if (adapter->hw.mac.type >= e1000_82571)
tctl |= E1000_TCTL_MULR;
/* This write will effectively turn on the transmit unit. */
E1000_WRITE_REG(&adapter->hw, E1000_TCTL, tctl);
}
/*********************************************************************
*
* Free all transmit rings.
*
**********************************************************************/
static void
em_free_transmit_structures(struct adapter *adapter)
{
struct tx_ring *txr = adapter->tx_rings;
for (int i = 0; i < adapter->num_queues; i++, txr++) {
EM_TX_LOCK(txr);
em_free_transmit_buffers(txr);
em_dma_free(adapter, &txr->txdma);
EM_TX_UNLOCK(txr);
EM_TX_LOCK_DESTROY(txr);
}
free(adapter->tx_rings, M_DEVBUF);
}
/*********************************************************************
*
* Free transmit ring related data structures.
*
**********************************************************************/
static void
em_free_transmit_buffers(struct tx_ring *txr)
{
struct adapter *adapter = txr->adapter;
struct em_buffer *txbuf;
INIT_DEBUGOUT("free_transmit_ring: begin");
if (txr->tx_buffers == NULL)
return;
for (int i = 0; i < adapter->num_tx_desc; i++) {
txbuf = &txr->tx_buffers[i];
if (txbuf->m_head != NULL) {
bus_dmamap_sync(txr->txtag, txbuf->map,
BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(txr->txtag,
txbuf->map);
m_freem(txbuf->m_head);
txbuf->m_head = NULL;
if (txbuf->map != NULL) {
bus_dmamap_destroy(txr->txtag,
txbuf->map);
txbuf->map = NULL;
}
} else if (txbuf->map != NULL) {
bus_dmamap_unload(txr->txtag,
txbuf->map);
bus_dmamap_destroy(txr->txtag,
txbuf->map);
txbuf->map = NULL;
}
}
#if __FreeBSD_version >= 800000
if (txr->br != NULL)
buf_ring_free(txr->br, M_DEVBUF);
#endif
if (txr->tx_buffers != NULL) {
free(txr->tx_buffers, M_DEVBUF);
txr->tx_buffers = NULL;
}
if (txr->txtag != NULL) {
bus_dma_tag_destroy(txr->txtag);
txr->txtag = NULL;
}
return;
}
/*********************************************************************
* The offload context is protocol specific (TCP/UDP) and thus
* only needs to be set when the protocol changes. The occasion
* of a context change can be a performance detriment, and
* might be better just disabled. The reason arises in the way
* in which the controller supports pipelined requests from the
* Tx data DMA. Up to four requests can be pipelined, and they may
* belong to the same packet or to multiple packets. However all
* requests for one packet are issued before a request is issued
* for a subsequent packet and if a request for the next packet
* requires a context change, that request will be stalled
* until the previous request completes. This means setting up
* a new context effectively disables pipelined Tx data DMA which
* in turn greatly slow down performance to send small sized
* frames.
**********************************************************************/
static void
em_transmit_checksum_setup(struct tx_ring *txr, struct mbuf *mp, int ip_off,
struct ip *ip, u32 *txd_upper, u32 *txd_lower)
{
struct adapter *adapter = txr->adapter;
struct e1000_context_desc *TXD = NULL;
struct em_buffer *tx_buffer;
int cur, hdr_len;
u32 cmd = 0;
u16 offload = 0;
u8 ipcso, ipcss, tucso, tucss;
ipcss = ipcso = tucss = tucso = 0;
hdr_len = ip_off + (ip->ip_hl << 2);
cur = txr->next_avail_desc;
/* Setup of IP header checksum. */
if (mp->m_pkthdr.csum_flags & CSUM_IP) {
*txd_upper |= E1000_TXD_POPTS_IXSM << 8;
offload |= CSUM_IP;
ipcss = ip_off;
ipcso = ip_off + offsetof(struct ip, ip_sum);
/*
* Start offset for header checksum calculation.
* End offset for header checksum calculation.
* Offset of place to put the checksum.
*/
TXD = (struct e1000_context_desc *)&txr->tx_base[cur];
TXD->lower_setup.ip_fields.ipcss = ipcss;
TXD->lower_setup.ip_fields.ipcse = htole16(hdr_len);
TXD->lower_setup.ip_fields.ipcso = ipcso;
cmd |= E1000_TXD_CMD_IP;
}
if (mp->m_pkthdr.csum_flags & CSUM_TCP) {
*txd_lower = E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
*txd_upper |= E1000_TXD_POPTS_TXSM << 8;
offload |= CSUM_TCP;
tucss = hdr_len;
tucso = hdr_len + offsetof(struct tcphdr, th_sum);
/*
* Setting up new checksum offload context for every frames
* takes a lot of processing time for hardware. This also
* reduces performance a lot for small sized frames so avoid
* it if driver can use previously configured checksum
* offload context.
*/
if (txr->last_hw_offload == offload) {
if (offload & CSUM_IP) {
if (txr->last_hw_ipcss == ipcss &&
txr->last_hw_ipcso == ipcso &&
txr->last_hw_tucss == tucss &&
txr->last_hw_tucso == tucso)
return;
} else {
if (txr->last_hw_tucss == tucss &&
txr->last_hw_tucso == tucso)
return;
}
}
txr->last_hw_offload = offload;
txr->last_hw_tucss = tucss;
txr->last_hw_tucso = tucso;
/*
* Start offset for payload checksum calculation.
* End offset for payload checksum calculation.
* Offset of place to put the checksum.
*/
TXD = (struct e1000_context_desc *)&txr->tx_base[cur];
TXD->upper_setup.tcp_fields.tucss = hdr_len;
TXD->upper_setup.tcp_fields.tucse = htole16(0);
TXD->upper_setup.tcp_fields.tucso = tucso;
cmd |= E1000_TXD_CMD_TCP;
} else if (mp->m_pkthdr.csum_flags & CSUM_UDP) {
*txd_lower = E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
*txd_upper |= E1000_TXD_POPTS_TXSM << 8;
tucss = hdr_len;
tucso = hdr_len + offsetof(struct udphdr, uh_sum);
/*
* Setting up new checksum offload context for every frames
* takes a lot of processing time for hardware. This also
* reduces performance a lot for small sized frames so avoid
* it if driver can use previously configured checksum
* offload context.
*/
if (txr->last_hw_offload == offload) {
if (offload & CSUM_IP) {
if (txr->last_hw_ipcss == ipcss &&
txr->last_hw_ipcso == ipcso &&
txr->last_hw_tucss == tucss &&
txr->last_hw_tucso == tucso)
return;
} else {
if (txr->last_hw_tucss == tucss &&
txr->last_hw_tucso == tucso)
return;
}
}
txr->last_hw_offload = offload;
txr->last_hw_tucss = tucss;
txr->last_hw_tucso = tucso;
/*
* Start offset for header checksum calculation.
* End offset for header checksum calculation.
* Offset of place to put the checksum.
*/
TXD = (struct e1000_context_desc *)&txr->tx_base[cur];
TXD->upper_setup.tcp_fields.tucss = tucss;
TXD->upper_setup.tcp_fields.tucse = htole16(0);
TXD->upper_setup.tcp_fields.tucso = tucso;
}
if (offload & CSUM_IP) {
txr->last_hw_ipcss = ipcss;
txr->last_hw_ipcso = ipcso;
}
TXD->tcp_seg_setup.data = htole32(0);
TXD->cmd_and_length =
htole32(adapter->txd_cmd | E1000_TXD_CMD_DEXT | cmd);
tx_buffer = &txr->tx_buffers[cur];
tx_buffer->m_head = NULL;
tx_buffer->next_eop = -1;
if (++cur == adapter->num_tx_desc)
cur = 0;
txr->tx_avail--;
txr->next_avail_desc = cur;
}
/**********************************************************************
*
* Setup work for hardware segmentation offload (TSO)
*
**********************************************************************/
static void
em_tso_setup(struct tx_ring *txr, struct mbuf *mp, int ip_off,
struct ip *ip, struct tcphdr *tp, u32 *txd_upper, u32 *txd_lower)
{
struct adapter *adapter = txr->adapter;
struct e1000_context_desc *TXD;
struct em_buffer *tx_buffer;
int cur, hdr_len;
/*
* In theory we can use the same TSO context if and only if
* frame is the same type(IP/TCP) and the same MSS. However
* checking whether a frame has the same IP/TCP structure is
* hard thing so just ignore that and always restablish a
* new TSO context.
*/
hdr_len = ip_off + (ip->ip_hl << 2) + (tp->th_off << 2);
*txd_lower = (E1000_TXD_CMD_DEXT | /* Extended descr type */
E1000_TXD_DTYP_D | /* Data descr type */
E1000_TXD_CMD_TSE); /* Do TSE on this packet */
/* IP and/or TCP header checksum calculation and insertion. */
*txd_upper = (E1000_TXD_POPTS_IXSM | E1000_TXD_POPTS_TXSM) << 8;
cur = txr->next_avail_desc;
tx_buffer = &txr->tx_buffers[cur];
TXD = (struct e1000_context_desc *) &txr->tx_base[cur];
/*
* Start offset for header checksum calculation.
* End offset for header checksum calculation.
* Offset of place put the checksum.
*/
TXD->lower_setup.ip_fields.ipcss = ip_off;
TXD->lower_setup.ip_fields.ipcse =
htole16(ip_off + (ip->ip_hl << 2) - 1);
TXD->lower_setup.ip_fields.ipcso = ip_off + offsetof(struct ip, ip_sum);
/*
* Start offset for payload checksum calculation.
* End offset for payload checksum calculation.
* Offset of place to put the checksum.
*/
TXD->upper_setup.tcp_fields.tucss = ip_off + (ip->ip_hl << 2);
TXD->upper_setup.tcp_fields.tucse = 0;
TXD->upper_setup.tcp_fields.tucso =
ip_off + (ip->ip_hl << 2) + offsetof(struct tcphdr, th_sum);
/*
* Payload size per packet w/o any headers.
* Length of all headers up to payload.
*/
TXD->tcp_seg_setup.fields.mss = htole16(mp->m_pkthdr.tso_segsz);
TXD->tcp_seg_setup.fields.hdr_len = hdr_len;
TXD->cmd_and_length = htole32(adapter->txd_cmd |
E1000_TXD_CMD_DEXT | /* Extended descr */
E1000_TXD_CMD_TSE | /* TSE context */
E1000_TXD_CMD_IP | /* Do IP csum */
E1000_TXD_CMD_TCP | /* Do TCP checksum */
(mp->m_pkthdr.len - (hdr_len))); /* Total len */
tx_buffer->m_head = NULL;
tx_buffer->next_eop = -1;
if (++cur == adapter->num_tx_desc)
cur = 0;
txr->tx_avail--;
txr->next_avail_desc = cur;
txr->tx_tso = TRUE;
}
/**********************************************************************
*
* Examine each tx_buffer in the used queue. If the hardware is done
* processing the packet then free associated resources. The
* tx_buffer is put back on the free queue.
*
**********************************************************************/
static void
em_txeof(struct tx_ring *txr)
{
struct adapter *adapter = txr->adapter;
int first, last, done, processed;
struct em_buffer *tx_buffer;
struct e1000_tx_desc *tx_desc, *eop_desc;
if_t ifp = adapter->ifp;
EM_TX_LOCK_ASSERT(txr);
#ifdef DEV_NETMAP
if (netmap_tx_irq(ifp, txr->me))
return;
#endif /* DEV_NETMAP */
/* No work, make sure hang detection is disabled */
if (txr->tx_avail == adapter->num_tx_desc) {
txr->busy = EM_TX_IDLE;
return;
}
processed = 0;
first = txr->next_to_clean;
tx_desc = &txr->tx_base[first];
tx_buffer = &txr->tx_buffers[first];
last = tx_buffer->next_eop;
eop_desc = &txr->tx_base[last];
/*
* What this does is get the index of the
* first descriptor AFTER the EOP of the
* first packet, that way we can do the
* simple comparison on the inner while loop.
*/
if (++last == adapter->num_tx_desc)
last = 0;
done = last;
bus_dmamap_sync(txr->txdma.dma_tag, txr->txdma.dma_map,
BUS_DMASYNC_POSTREAD);
while (eop_desc->upper.fields.status & E1000_TXD_STAT_DD) {
/* We clean the range of the packet */
while (first != done) {
tx_desc->upper.data = 0;
tx_desc->lower.data = 0;
tx_desc->buffer_addr = 0;
++txr->tx_avail;
++processed;
if (tx_buffer->m_head) {
bus_dmamap_sync(txr->txtag,
tx_buffer->map,
BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(txr->txtag,
tx_buffer->map);
m_freem(tx_buffer->m_head);
tx_buffer->m_head = NULL;
}
tx_buffer->next_eop = -1;
if (++first == adapter->num_tx_desc)
first = 0;
tx_buffer = &txr->tx_buffers[first];
tx_desc = &txr->tx_base[first];
}
if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
/* See if we can continue to the next packet */
last = tx_buffer->next_eop;
if (last != -1) {
eop_desc = &txr->tx_base[last];
/* Get new done point */
if (++last == adapter->num_tx_desc) last = 0;
done = last;
} else
break;
}
bus_dmamap_sync(txr->txdma.dma_tag, txr->txdma.dma_map,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
txr->next_to_clean = first;
/*
** Hang detection: we know there's work outstanding
** or the entry return would have been taken, so no
** descriptor processed here indicates a potential hang.
** The local timer will examine this and do a reset if needed.
*/
if (processed == 0) {
if (txr->busy != EM_TX_HUNG)
++txr->busy;
} else /* At least one descriptor was cleaned */
txr->busy = EM_TX_BUSY; /* note this clears HUNG */
/*
* If we have a minimum free, clear IFF_DRV_OACTIVE
* to tell the stack that it is OK to send packets.
* Notice that all writes of OACTIVE happen under the
* TX lock which, with a single queue, guarantees
* sanity.
*/
if (txr->tx_avail >= EM_MAX_SCATTER) {
if_setdrvflagbits(ifp, 0, IFF_DRV_OACTIVE);
}
/* Disable hang detection if all clean */
if (txr->tx_avail == adapter->num_tx_desc)
txr->busy = EM_TX_IDLE;
}
/*********************************************************************
*
* Refresh RX descriptor mbufs from system mbuf buffer pool.
*
**********************************************************************/
static void
em_refresh_mbufs(struct rx_ring *rxr, int limit)
{
struct adapter *adapter = rxr->adapter;
struct mbuf *m;
bus_dma_segment_t segs[1];
struct em_buffer *rxbuf;
int i, j, error, nsegs;
bool cleaned = FALSE;
i = j = rxr->next_to_refresh;
/*
** Get one descriptor beyond
** our work mark to control
** the loop.
*/
if (++j == adapter->num_rx_desc)
j = 0;
while (j != limit) {
rxbuf = &rxr->rx_buffers[i];
if (rxbuf->m_head == NULL) {
m = m_getjcl(M_NOWAIT, MT_DATA,
M_PKTHDR, adapter->rx_mbuf_sz);
/*
** If we have a temporary resource shortage
** that causes a failure, just abort refresh
** for now, we will return to this point when
** reinvoked from em_rxeof.
*/
if (m == NULL)
goto update;
} else
m = rxbuf->m_head;
m->m_len = m->m_pkthdr.len = adapter->rx_mbuf_sz;
m->m_flags |= M_PKTHDR;
m->m_data = m->m_ext.ext_buf;
/* Use bus_dma machinery to setup the memory mapping */
error = bus_dmamap_load_mbuf_sg(rxr->rxtag, rxbuf->map,
m, segs, &nsegs, BUS_DMA_NOWAIT);
if (error != 0) {
printf("Refresh mbufs: hdr dmamap load"
" failure - %d\n", error);
m_free(m);
rxbuf->m_head = NULL;
goto update;
}
rxbuf->m_head = m;
bus_dmamap_sync(rxr->rxtag,
rxbuf->map, BUS_DMASYNC_PREREAD);
rxr->rx_base[i].buffer_addr = htole64(segs[0].ds_addr);
cleaned = TRUE;
i = j; /* Next is precalulated for us */
rxr->next_to_refresh = i;
/* Calculate next controlling index */
if (++j == adapter->num_rx_desc)
j = 0;
}
update:
/*
** Update the tail pointer only if,
** and as far as we have refreshed.
*/
if (cleaned)
E1000_WRITE_REG(&adapter->hw,
E1000_RDT(rxr->me), rxr->next_to_refresh);
return;
}
/*********************************************************************
*
* Allocate memory for rx_buffer structures. Since we use one
* rx_buffer per received packet, the maximum number of rx_buffer's
* that we'll need is equal to the number of receive descriptors
* that we've allocated.
*
**********************************************************************/
static int
em_allocate_receive_buffers(struct rx_ring *rxr)
{
struct adapter *adapter = rxr->adapter;
device_t dev = adapter->dev;
struct em_buffer *rxbuf;
int error;
rxr->rx_buffers = malloc(sizeof(struct em_buffer) *
adapter->num_rx_desc, M_DEVBUF, M_NOWAIT | M_ZERO);
if (rxr->rx_buffers == NULL) {
device_printf(dev, "Unable to allocate rx_buffer memory\n");
return (ENOMEM);
}
error = bus_dma_tag_create(bus_get_dma_tag(dev), /* parent */
1, 0, /* alignment, bounds */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
MJUM9BYTES, /* maxsize */
1, /* nsegments */
MJUM9BYTES, /* maxsegsize */
0, /* flags */
NULL, /* lockfunc */
NULL, /* lockarg */
&rxr->rxtag);
if (error) {
device_printf(dev, "%s: bus_dma_tag_create failed %d\n",
__func__, error);
goto fail;
}
rxbuf = rxr->rx_buffers;
for (int i = 0; i < adapter->num_rx_desc; i++, rxbuf++) {
rxbuf = &rxr->rx_buffers[i];
error = bus_dmamap_create(rxr->rxtag, 0, &rxbuf->map);
if (error) {
device_printf(dev, "%s: bus_dmamap_create failed: %d\n",
__func__, error);
goto fail;
}
}
return (0);
fail:
em_free_receive_structures(adapter);
return (error);
}
/*********************************************************************
*
* Initialize a receive ring and its buffers.
*
**********************************************************************/
static int
em_setup_receive_ring(struct rx_ring *rxr)
{
struct adapter *adapter = rxr->adapter;
struct em_buffer *rxbuf;
bus_dma_segment_t seg[1];
int rsize, nsegs, error = 0;
#ifdef DEV_NETMAP
struct netmap_slot *slot;
struct netmap_adapter *na = netmap_getna(adapter->ifp);
#endif
/* Clear the ring contents */
EM_RX_LOCK(rxr);
rsize = roundup2(adapter->num_rx_desc *
sizeof(struct e1000_rx_desc), EM_DBA_ALIGN);
bzero((void *)rxr->rx_base, rsize);
#ifdef DEV_NETMAP
slot = netmap_reset(na, NR_RX, rxr->me, 0);
#endif
/*
** Free current RX buffer structs and their mbufs
*/
for (int i = 0; i < adapter->num_rx_desc; i++) {
rxbuf = &rxr->rx_buffers[i];
if (rxbuf->m_head != NULL) {
bus_dmamap_sync(rxr->rxtag, rxbuf->map,
BUS_DMASYNC_POSTREAD);
bus_dmamap_unload(rxr->rxtag, rxbuf->map);
m_freem(rxbuf->m_head);
rxbuf->m_head = NULL; /* mark as freed */
}
}
/* Now replenish the mbufs */
for (int j = 0; j != adapter->num_rx_desc; ++j) {
rxbuf = &rxr->rx_buffers[j];
#ifdef DEV_NETMAP
if (slot) {
int si = netmap_idx_n2k(&na->rx_rings[rxr->me], j);
uint64_t paddr;
void *addr;
addr = PNMB(na, slot + si, &paddr);
netmap_load_map(na, rxr->rxtag, rxbuf->map, addr);
/* Update descriptor */
rxr->rx_base[j].buffer_addr = htole64(paddr);
continue;
}
#endif /* DEV_NETMAP */
rxbuf->m_head = m_getjcl(M_NOWAIT, MT_DATA,
M_PKTHDR, adapter->rx_mbuf_sz);
if (rxbuf->m_head == NULL) {
error = ENOBUFS;
goto fail;
}
rxbuf->m_head->m_len = adapter->rx_mbuf_sz;
rxbuf->m_head->m_flags &= ~M_HASFCS; /* we strip it */
rxbuf->m_head->m_pkthdr.len = adapter->rx_mbuf_sz;
/* Get the memory mapping */
error = bus_dmamap_load_mbuf_sg(rxr->rxtag,
rxbuf->map, rxbuf->m_head, seg,
&nsegs, BUS_DMA_NOWAIT);
if (error != 0) {
m_freem(rxbuf->m_head);
rxbuf->m_head = NULL;
goto fail;
}
bus_dmamap_sync(rxr->rxtag,
rxbuf->map, BUS_DMASYNC_PREREAD);
/* Update descriptor */
rxr->rx_base[j].buffer_addr = htole64(seg[0].ds_addr);
}
rxr->next_to_check = 0;
rxr->next_to_refresh = 0;
bus_dmamap_sync(rxr->rxdma.dma_tag, rxr->rxdma.dma_map,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
fail:
EM_RX_UNLOCK(rxr);
return (error);
}
/*********************************************************************
*
* Initialize all receive rings.
*
**********************************************************************/
static int
em_setup_receive_structures(struct adapter *adapter)
{
struct rx_ring *rxr = adapter->rx_rings;
int q;
for (q = 0; q < adapter->num_queues; q++, rxr++)
if (em_setup_receive_ring(rxr))
goto fail;
return (0);
fail:
/*
* Free RX buffers allocated so far, we will only handle
* the rings that completed, the failing case will have
* cleaned up for itself. 'q' failed, so its the terminus.
*/
for (int i = 0; i < q; ++i) {
rxr = &adapter->rx_rings[i];
for (int n = 0; n < adapter->num_rx_desc; n++) {
struct em_buffer *rxbuf;
rxbuf = &rxr->rx_buffers[n];
if (rxbuf->m_head != NULL) {
bus_dmamap_sync(rxr->rxtag, rxbuf->map,
BUS_DMASYNC_POSTREAD);
bus_dmamap_unload(rxr->rxtag, rxbuf->map);
m_freem(rxbuf->m_head);
rxbuf->m_head = NULL;
}
}
rxr->next_to_check = 0;
rxr->next_to_refresh = 0;
}
return (ENOBUFS);
}
/*********************************************************************
*
* Free all receive rings.
*
**********************************************************************/
static void
em_free_receive_structures(struct adapter *adapter)
{
struct rx_ring *rxr = adapter->rx_rings;
for (int i = 0; i < adapter->num_queues; i++, rxr++) {
em_free_receive_buffers(rxr);
/* Free the ring memory as well */
em_dma_free(adapter, &rxr->rxdma);
EM_RX_LOCK_DESTROY(rxr);
}
free(adapter->rx_rings, M_DEVBUF);
}
/*********************************************************************
*
* Free receive ring data structures
*
**********************************************************************/
static void
em_free_receive_buffers(struct rx_ring *rxr)
{
struct adapter *adapter = rxr->adapter;
struct em_buffer *rxbuf = NULL;
INIT_DEBUGOUT("free_receive_buffers: begin");
if (rxr->rx_buffers != NULL) {
for (int i = 0; i < adapter->num_rx_desc; i++) {
rxbuf = &rxr->rx_buffers[i];
if (rxbuf->map != NULL) {
bus_dmamap_sync(rxr->rxtag, rxbuf->map,
BUS_DMASYNC_POSTREAD);
bus_dmamap_unload(rxr->rxtag, rxbuf->map);
bus_dmamap_destroy(rxr->rxtag, rxbuf->map);
}
if (rxbuf->m_head != NULL) {
m_freem(rxbuf->m_head);
rxbuf->m_head = NULL;
}
}
free(rxr->rx_buffers, M_DEVBUF);
rxr->rx_buffers = NULL;
rxr->next_to_check = 0;
rxr->next_to_refresh = 0;
}
if (rxr->rxtag != NULL) {
bus_dma_tag_destroy(rxr->rxtag);
rxr->rxtag = NULL;
}
return;
}
/*********************************************************************
*
* Enable receive unit.
*
**********************************************************************/
static void
em_initialize_receive_unit(struct adapter *adapter)
{
struct rx_ring *rxr = adapter->rx_rings;
if_t ifp = adapter->ifp;
struct e1000_hw *hw = &adapter->hw;
u64 bus_addr;
u32 rctl, rxcsum;
INIT_DEBUGOUT("em_initialize_receive_units: begin");
/*
* Make sure receives are disabled while setting
* up the descriptor ring
*/
rctl = E1000_READ_REG(hw, E1000_RCTL);
/* Do not disable if ever enabled on this hardware */
if ((hw->mac.type != e1000_82574) && (hw->mac.type != e1000_82583))
E1000_WRITE_REG(hw, E1000_RCTL, rctl & ~E1000_RCTL_EN);
E1000_WRITE_REG(&adapter->hw, E1000_RADV,
adapter->rx_abs_int_delay.value);
E1000_WRITE_REG(&adapter->hw, E1000_RDTR,
adapter->rx_int_delay.value);
/*
* Set the interrupt throttling rate. Value is calculated
* as DEFAULT_ITR = 1/(MAX_INTS_PER_SEC * 256ns)
*/
E1000_WRITE_REG(hw, E1000_ITR, DEFAULT_ITR);
/*
** When using MSIX interrupts we need to throttle
** using the EITR register (82574 only)
*/
if (hw->mac.type == e1000_82574) {
u32 rfctl;
for (int i = 0; i < 4; i++)
E1000_WRITE_REG(hw, E1000_EITR_82574(i),
DEFAULT_ITR);
/* Disable accelerated acknowledge */
rfctl = E1000_READ_REG(hw, E1000_RFCTL);
rfctl |= E1000_RFCTL_ACK_DIS;
E1000_WRITE_REG(hw, E1000_RFCTL, rfctl);
}
rxcsum = E1000_READ_REG(hw, E1000_RXCSUM);
if (if_getcapenable(ifp) & IFCAP_RXCSUM) {
#ifdef EM_MULTIQUEUE
rxcsum |= E1000_RXCSUM_TUOFL |
E1000_RXCSUM_IPOFL |
E1000_RXCSUM_PCSD;
#else
rxcsum |= E1000_RXCSUM_TUOFL;
#endif
} else
rxcsum &= ~E1000_RXCSUM_TUOFL;
E1000_WRITE_REG(hw, E1000_RXCSUM, rxcsum);
#ifdef EM_MULTIQUEUE
if (adapter->num_queues > 1) {
uint32_t rss_key[10];
uint32_t reta;
int i;
/*
* Configure RSS key
*/
arc4rand(rss_key, sizeof(rss_key), 0);
for (i = 0; i < 10; ++i)
E1000_WRITE_REG_ARRAY(hw,E1000_RSSRK(0), i, rss_key[i]);
/*
* Configure RSS redirect table in following fashion:
* (hash & ring_cnt_mask) == rdr_table[(hash & rdr_table_mask)]
*/
reta = 0;
for (i = 0; i < 4; ++i) {
uint32_t q;
q = (i % adapter->num_queues) << 7;
reta |= q << (8 * i);
}
for (i = 0; i < 32; ++i)
E1000_WRITE_REG(hw, E1000_RETA(i), reta);
E1000_WRITE_REG(hw, E1000_MRQC, E1000_MRQC_RSS_ENABLE_2Q |
E1000_MRQC_RSS_FIELD_IPV4_TCP |
E1000_MRQC_RSS_FIELD_IPV4 |
E1000_MRQC_RSS_FIELD_IPV6_TCP_EX |
E1000_MRQC_RSS_FIELD_IPV6_EX |
E1000_MRQC_RSS_FIELD_IPV6 |
E1000_MRQC_RSS_FIELD_IPV6_TCP);
}
#endif
/*
** XXX TEMPORARY WORKAROUND: on some systems with 82573
** long latencies are observed, like Lenovo X60. This
** change eliminates the problem, but since having positive
** values in RDTR is a known source of problems on other
** platforms another solution is being sought.
*/
if (hw->mac.type == e1000_82573)
E1000_WRITE_REG(hw, E1000_RDTR, 0x20);
for (int i = 0; i < adapter->num_queues; i++, rxr++) {
/* Setup the Base and Length of the Rx Descriptor Ring */
u32 rdt = adapter->num_rx_desc - 1; /* default */
bus_addr = rxr->rxdma.dma_paddr;
E1000_WRITE_REG(hw, E1000_RDLEN(i),
adapter->num_rx_desc * sizeof(struct e1000_rx_desc));
E1000_WRITE_REG(hw, E1000_RDBAH(i), (u32)(bus_addr >> 32));
E1000_WRITE_REG(hw, E1000_RDBAL(i), (u32)bus_addr);
/* Setup the Head and Tail Descriptor Pointers */
E1000_WRITE_REG(hw, E1000_RDH(i), 0);
#ifdef DEV_NETMAP
/*
* an init() while a netmap client is active must
* preserve the rx buffers passed to userspace.
*/
if (if_getcapenable(ifp) & IFCAP_NETMAP) {
struct netmap_adapter *na = netmap_getna(adapter->ifp);
rdt -= nm_kr_rxspace(&na->rx_rings[i]);
}
#endif /* DEV_NETMAP */
E1000_WRITE_REG(hw, E1000_RDT(i), rdt);
}
/*
* Set PTHRESH for improved jumbo performance
* According to 10.2.5.11 of Intel 82574 Datasheet,
* RXDCTL(1) is written whenever RXDCTL(0) is written.
* Only write to RXDCTL(1) if there is a need for different
* settings.
*/
if (((adapter->hw.mac.type == e1000_ich9lan) ||
(adapter->hw.mac.type == e1000_pch2lan) ||
(adapter->hw.mac.type == e1000_ich10lan)) &&
(if_getmtu(ifp) > ETHERMTU)) {
u32 rxdctl = E1000_READ_REG(hw, E1000_RXDCTL(0));
E1000_WRITE_REG(hw, E1000_RXDCTL(0), rxdctl | 3);
} else if ((adapter->hw.mac.type == e1000_82574) &&
(if_getmtu(ifp) > ETHERMTU)) {
for (int i = 0; i < adapter->num_queues; i++) {
u32 rxdctl = E1000_READ_REG(hw, E1000_RXDCTL(i));
rxdctl |= 0x20; /* PTHRESH */
rxdctl |= 4 << 8; /* HTHRESH */
rxdctl |= 4 << 16;/* WTHRESH */
rxdctl |= 1 << 24; /* Switch to granularity */
E1000_WRITE_REG(hw, E1000_RXDCTL(i), rxdctl);
}
}
if (adapter->hw.mac.type >= e1000_pch2lan) {
if (if_getmtu(ifp) > ETHERMTU)
e1000_lv_jumbo_workaround_ich8lan(hw, TRUE);
else
e1000_lv_jumbo_workaround_ich8lan(hw, FALSE);
}
/* Setup the Receive Control Register */
rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
(hw->mac.mc_filter_type << E1000_RCTL_MO_SHIFT);
/* Strip the CRC */
rctl |= E1000_RCTL_SECRC;
/* Make sure VLAN Filters are off */
rctl &= ~E1000_RCTL_VFE;
rctl &= ~E1000_RCTL_SBP;
if (adapter->rx_mbuf_sz == MCLBYTES)
rctl |= E1000_RCTL_SZ_2048;
else if (adapter->rx_mbuf_sz == MJUMPAGESIZE)
rctl |= E1000_RCTL_SZ_4096 | E1000_RCTL_BSEX;
else if (adapter->rx_mbuf_sz > MJUMPAGESIZE)
rctl |= E1000_RCTL_SZ_8192 | E1000_RCTL_BSEX;
if (if_getmtu(ifp) > ETHERMTU)
rctl |= E1000_RCTL_LPE;
else
rctl &= ~E1000_RCTL_LPE;
/* Write out the settings */
E1000_WRITE_REG(hw, E1000_RCTL, rctl);
return;
}
/*********************************************************************
*
* This routine executes in interrupt context. It replenishes
* the mbufs in the descriptor and sends data which has been
* dma'ed into host memory to upper layer.
*
* We loop at most count times if count is > 0, or until done if
* count < 0.
*
* For polling we also now return the number of cleaned packets
*********************************************************************/
static bool
em_rxeof(struct rx_ring *rxr, int count, int *done)
{
struct adapter *adapter = rxr->adapter;
if_t ifp = adapter->ifp;
struct mbuf *mp, *sendmp;
u8 status = 0;
u16 len;
int i, processed, rxdone = 0;
bool eop;
struct e1000_rx_desc *cur;
EM_RX_LOCK(rxr);
/* Sync the ring */
bus_dmamap_sync(rxr->rxdma.dma_tag, rxr->rxdma.dma_map,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
#ifdef DEV_NETMAP
if (netmap_rx_irq(ifp, rxr->me, &processed)) {
EM_RX_UNLOCK(rxr);
return (FALSE);
}
#endif /* DEV_NETMAP */
for (i = rxr->next_to_check, processed = 0; count != 0;) {
if ((if_getdrvflags(ifp) & IFF_DRV_RUNNING) == 0)
break;
cur = &rxr->rx_base[i];
status = cur->status;
mp = sendmp = NULL;
if ((status & E1000_RXD_STAT_DD) == 0)
break;
len = le16toh(cur->length);
eop = (status & E1000_RXD_STAT_EOP) != 0;
if ((cur->errors & E1000_RXD_ERR_FRAME_ERR_MASK) ||
(rxr->discard == TRUE)) {
adapter->dropped_pkts++;
++rxr->rx_discarded;
if (!eop) /* Catch subsequent segs */
rxr->discard = TRUE;
else
rxr->discard = FALSE;
em_rx_discard(rxr, i);
goto next_desc;
}
bus_dmamap_unload(rxr->rxtag, rxr->rx_buffers[i].map);
/* Assign correct length to the current fragment */
mp = rxr->rx_buffers[i].m_head;
mp->m_len = len;
/* Trigger for refresh */
rxr->rx_buffers[i].m_head = NULL;
/* First segment? */
if (rxr->fmp == NULL) {
mp->m_pkthdr.len = len;
rxr->fmp = rxr->lmp = mp;
} else {
/* Chain mbuf's together */
mp->m_flags &= ~M_PKTHDR;
rxr->lmp->m_next = mp;
rxr->lmp = mp;
rxr->fmp->m_pkthdr.len += len;
}
if (eop) {
--count;
sendmp = rxr->fmp;
if_setrcvif(sendmp, ifp);
if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
em_receive_checksum(cur, sendmp);
#ifndef __NO_STRICT_ALIGNMENT
if (adapter->hw.mac.max_frame_size >
(MCLBYTES - ETHER_ALIGN) &&
em_fixup_rx(rxr) != 0)
goto skip;
#endif
if (status & E1000_RXD_STAT_VP) {
if_setvtag(sendmp,
le16toh(cur->special));
sendmp->m_flags |= M_VLANTAG;
}
#ifndef __NO_STRICT_ALIGNMENT
skip:
#endif
rxr->fmp = rxr->lmp = NULL;
}
next_desc:
/* Sync the ring */
bus_dmamap_sync(rxr->rxdma.dma_tag, rxr->rxdma.dma_map,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
/* Zero out the receive descriptors status. */
cur->status = 0;
++rxdone; /* cumulative for POLL */
++processed;
/* Advance our pointers to the next descriptor. */
if (++i == adapter->num_rx_desc)
i = 0;
/* Send to the stack */
if (sendmp != NULL) {
rxr->next_to_check = i;
EM_RX_UNLOCK(rxr);
if_input(ifp, sendmp);
EM_RX_LOCK(rxr);
i = rxr->next_to_check;
}
/* Only refresh mbufs every 8 descriptors */
if (processed == 8) {
em_refresh_mbufs(rxr, i);
processed = 0;
}
}
/* Catch any remaining refresh work */
if (e1000_rx_unrefreshed(rxr))
em_refresh_mbufs(rxr, i);
rxr->next_to_check = i;
if (done != NULL)
*done = rxdone;
EM_RX_UNLOCK(rxr);
return ((status & E1000_RXD_STAT_DD) ? TRUE : FALSE);
}
static __inline void
em_rx_discard(struct rx_ring *rxr, int i)
{
struct em_buffer *rbuf;
rbuf = &rxr->rx_buffers[i];
bus_dmamap_unload(rxr->rxtag, rbuf->map);
/* Free any previous pieces */
if (rxr->fmp != NULL) {
rxr->fmp->m_flags |= M_PKTHDR;
m_freem(rxr->fmp);
rxr->fmp = NULL;
rxr->lmp = NULL;
}
/*
** Free buffer and allow em_refresh_mbufs()
** to clean up and recharge buffer.
*/
if (rbuf->m_head) {
m_free(rbuf->m_head);
rbuf->m_head = NULL;
}
return;
}
#ifndef __NO_STRICT_ALIGNMENT
/*
* When jumbo frames are enabled we should realign entire payload on
* architecures with strict alignment. This is serious design mistake of 8254x
* as it nullifies DMA operations. 8254x just allows RX buffer size to be
* 2048/4096/8192/16384. What we really want is 2048 - ETHER_ALIGN to align its
* payload. On architecures without strict alignment restrictions 8254x still
* performs unaligned memory access which would reduce the performance too.
* To avoid copying over an entire frame to align, we allocate a new mbuf and
* copy ethernet header to the new mbuf. The new mbuf is prepended into the
* existing mbuf chain.
*
* Be aware, best performance of the 8254x is achived only when jumbo frame is
* not used at all on architectures with strict alignment.
*/
static int
em_fixup_rx(struct rx_ring *rxr)
{
struct adapter *adapter = rxr->adapter;
struct mbuf *m, *n;
int error;
error = 0;
m = rxr->fmp;
if (m->m_len <= (MCLBYTES - ETHER_HDR_LEN)) {
bcopy(m->m_data, m->m_data + ETHER_HDR_LEN, m->m_len);
m->m_data += ETHER_HDR_LEN;
} else {
MGETHDR(n, M_NOWAIT, MT_DATA);
if (n != NULL) {
bcopy(m->m_data, n->m_data, ETHER_HDR_LEN);
m->m_data += ETHER_HDR_LEN;
m->m_len -= ETHER_HDR_LEN;
n->m_len = ETHER_HDR_LEN;
M_MOVE_PKTHDR(n, m);
n->m_next = m;
rxr->fmp = n;
} else {
adapter->dropped_pkts++;
m_freem(rxr->fmp);
rxr->fmp = NULL;
error = ENOMEM;
}
}
return (error);
}
#endif
/*********************************************************************
*
* Verify that the hardware indicated that the checksum is valid.
* Inform the stack about the status of checksum so that stack
* doesn't spend time verifying the checksum.
*
*********************************************************************/
static void
em_receive_checksum(struct e1000_rx_desc *rx_desc, struct mbuf *mp)
{
mp->m_pkthdr.csum_flags = 0;
/* Ignore Checksum bit is set */
if (rx_desc->status & E1000_RXD_STAT_IXSM)
return;
if (rx_desc->errors & (E1000_RXD_ERR_TCPE | E1000_RXD_ERR_IPE))
return;
/* IP Checksum Good? */
if (rx_desc->status & E1000_RXD_STAT_IPCS)
mp->m_pkthdr.csum_flags = (CSUM_IP_CHECKED | CSUM_IP_VALID);
/* TCP or UDP checksum */
if (rx_desc->status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)) {
mp->m_pkthdr.csum_flags |= (CSUM_DATA_VALID | CSUM_PSEUDO_HDR);
mp->m_pkthdr.csum_data = htons(0xffff);
}
}
/*
* This routine is run via an vlan
* config EVENT
*/
static void
em_register_vlan(void *arg, if_t ifp, u16 vtag)
{
struct adapter *adapter = if_getsoftc(ifp);
u32 index, bit;
if ((void*)adapter != arg) /* Not our event */
return;
if ((vtag == 0) || (vtag > 4095)) /* Invalid ID */
return;
EM_CORE_LOCK(adapter);
index = (vtag >> 5) & 0x7F;
bit = vtag & 0x1F;
adapter->shadow_vfta[index] |= (1 << bit);
++adapter->num_vlans;
/* Re-init to load the changes */
if (if_getcapenable(ifp) & IFCAP_VLAN_HWFILTER)
em_init_locked(adapter);
EM_CORE_UNLOCK(adapter);
}
/*
* This routine is run via an vlan
* unconfig EVENT
*/
static void
em_unregister_vlan(void *arg, if_t ifp, u16 vtag)
{
struct adapter *adapter = if_getsoftc(ifp);
u32 index, bit;
if (adapter != arg)
return;
if ((vtag == 0) || (vtag > 4095)) /* Invalid */
return;
EM_CORE_LOCK(adapter);
index = (vtag >> 5) & 0x7F;
bit = vtag & 0x1F;
adapter->shadow_vfta[index] &= ~(1 << bit);
--adapter->num_vlans;
/* Re-init to load the changes */
if (if_getcapenable(ifp) & IFCAP_VLAN_HWFILTER)
em_init_locked(adapter);
EM_CORE_UNLOCK(adapter);
}
static void
em_setup_vlan_hw_support(struct adapter *adapter)
{
struct e1000_hw *hw = &adapter->hw;
u32 reg;
/*
** We get here thru init_locked, meaning
** a soft reset, this has already cleared
** the VFTA and other state, so if there
** have been no vlan's registered do nothing.
*/
if (adapter->num_vlans == 0)
return;
/*
** A soft reset zero's out the VFTA, so
** we need to repopulate it now.
*/
for (int i = 0; i < EM_VFTA_SIZE; i++)
if (adapter->shadow_vfta[i] != 0)
E1000_WRITE_REG_ARRAY(hw, E1000_VFTA,
i, adapter->shadow_vfta[i]);
reg = E1000_READ_REG(hw, E1000_CTRL);
reg |= E1000_CTRL_VME;
E1000_WRITE_REG(hw, E1000_CTRL, reg);
/* Enable the Filter Table */
reg = E1000_READ_REG(hw, E1000_RCTL);
reg &= ~E1000_RCTL_CFIEN;
reg |= E1000_RCTL_VFE;
E1000_WRITE_REG(hw, E1000_RCTL, reg);
}
static void
em_enable_intr(struct adapter *adapter)
{
struct e1000_hw *hw = &adapter->hw;
u32 ims_mask = IMS_ENABLE_MASK;
if (hw->mac.type == e1000_82574) {
E1000_WRITE_REG(hw, EM_EIAC, EM_MSIX_MASK);
ims_mask |= EM_MSIX_MASK;
}
E1000_WRITE_REG(hw, E1000_IMS, ims_mask);
}
static void
em_disable_intr(struct adapter *adapter)
{
struct e1000_hw *hw = &adapter->hw;
if (hw->mac.type == e1000_82574)
E1000_WRITE_REG(hw, EM_EIAC, 0);
E1000_WRITE_REG(&adapter->hw, E1000_IMC, 0xffffffff);
}
/*
* Bit of a misnomer, what this really means is
* to enable OS management of the system... aka
* to disable special hardware management features
*/
static void
em_init_manageability(struct adapter *adapter)
{
/* A shared code workaround */
#define E1000_82542_MANC2H E1000_MANC2H
if (adapter->has_manage) {
int manc2h = E1000_READ_REG(&adapter->hw, E1000_MANC2H);
int manc = E1000_READ_REG(&adapter->hw, E1000_MANC);
/* disable hardware interception of ARP */
manc &= ~(E1000_MANC_ARP_EN);
/* enable receiving management packets to the host */
manc |= E1000_MANC_EN_MNG2HOST;
#define E1000_MNG2HOST_PORT_623 (1 << 5)
#define E1000_MNG2HOST_PORT_664 (1 << 6)
manc2h |= E1000_MNG2HOST_PORT_623;
manc2h |= E1000_MNG2HOST_PORT_664;
E1000_WRITE_REG(&adapter->hw, E1000_MANC2H, manc2h);
E1000_WRITE_REG(&adapter->hw, E1000_MANC, manc);
}
}
/*
* Give control back to hardware management
* controller if there is one.
*/
static void
em_release_manageability(struct adapter *adapter)
{
if (adapter->has_manage) {
int manc = E1000_READ_REG(&adapter->hw, E1000_MANC);
/* re-enable hardware interception of ARP */
manc |= E1000_MANC_ARP_EN;
manc &= ~E1000_MANC_EN_MNG2HOST;
E1000_WRITE_REG(&adapter->hw, E1000_MANC, manc);
}
}
/*
* em_get_hw_control sets the {CTRL_EXT|FWSM}:DRV_LOAD bit.
* For ASF and Pass Through versions of f/w this means
* that the driver is loaded. For AMT version type f/w
* this means that the network i/f is open.
*/
static void
em_get_hw_control(struct adapter *adapter)
{
u32 ctrl_ext, swsm;
if (adapter->hw.mac.type == e1000_82573) {
swsm = E1000_READ_REG(&adapter->hw, E1000_SWSM);
E1000_WRITE_REG(&adapter->hw, E1000_SWSM,
swsm | E1000_SWSM_DRV_LOAD);
return;
}
/* else */
ctrl_ext = E1000_READ_REG(&adapter->hw, E1000_CTRL_EXT);
E1000_WRITE_REG(&adapter->hw, E1000_CTRL_EXT,
ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
return;
}
/*
* em_release_hw_control resets {CTRL_EXT|FWSM}:DRV_LOAD bit.
* For ASF and Pass Through versions of f/w this means that
* the driver is no longer loaded. For AMT versions of the
* f/w this means that the network i/f is closed.
*/
static void
em_release_hw_control(struct adapter *adapter)
{
u32 ctrl_ext, swsm;
if (!adapter->has_manage)
return;
if (adapter->hw.mac.type == e1000_82573) {
swsm = E1000_READ_REG(&adapter->hw, E1000_SWSM);
E1000_WRITE_REG(&adapter->hw, E1000_SWSM,
swsm & ~E1000_SWSM_DRV_LOAD);
return;
}
/* else */
ctrl_ext = E1000_READ_REG(&adapter->hw, E1000_CTRL_EXT);
E1000_WRITE_REG(&adapter->hw, E1000_CTRL_EXT,
ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
return;
}
static int
em_is_valid_ether_addr(u8 *addr)
{
char zero_addr[6] = { 0, 0, 0, 0, 0, 0 };
if ((addr[0] & 1) || (!bcmp(addr, zero_addr, ETHER_ADDR_LEN))) {
return (FALSE);
}
return (TRUE);
}
/*
** Parse the interface capabilities with regard
** to both system management and wake-on-lan for
** later use.
*/
static void
em_get_wakeup(device_t dev)
{
struct adapter *adapter = device_get_softc(dev);
u16 eeprom_data = 0, device_id, apme_mask;
adapter->has_manage = e1000_enable_mng_pass_thru(&adapter->hw);
apme_mask = EM_EEPROM_APME;
switch (adapter->hw.mac.type) {
case e1000_82573:
case e1000_82583:
adapter->has_amt = TRUE;
/* Falls thru */
case e1000_82571:
case e1000_82572:
case e1000_80003es2lan:
if (adapter->hw.bus.func == 1) {
e1000_read_nvm(&adapter->hw,
NVM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
break;
} else
e1000_read_nvm(&adapter->hw,
NVM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
break;
case e1000_ich8lan:
case e1000_ich9lan:
case e1000_ich10lan:
case e1000_pchlan:
case e1000_pch2lan:
apme_mask = E1000_WUC_APME;
adapter->has_amt = TRUE;
eeprom_data = E1000_READ_REG(&adapter->hw, E1000_WUC);
break;
default:
e1000_read_nvm(&adapter->hw,
NVM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
break;
}
if (eeprom_data & apme_mask)
adapter->wol = (E1000_WUFC_MAG | E1000_WUFC_MC);
/*
* We have the eeprom settings, now apply the special cases
* where the eeprom may be wrong or the board won't support
* wake on lan on a particular port
*/
device_id = pci_get_device(dev);
switch (device_id) {
case E1000_DEV_ID_82571EB_FIBER:
/* Wake events only supported on port A for dual fiber
* regardless of eeprom setting */
if (E1000_READ_REG(&adapter->hw, E1000_STATUS) &
E1000_STATUS_FUNC_1)
adapter->wol = 0;
break;
case E1000_DEV_ID_82571EB_QUAD_COPPER:
case E1000_DEV_ID_82571EB_QUAD_FIBER:
case E1000_DEV_ID_82571EB_QUAD_COPPER_LP:
/* if quad port adapter, disable WoL on all but port A */
if (global_quad_port_a != 0)
adapter->wol = 0;
/* Reset for multiple quad port adapters */
if (++global_quad_port_a == 4)
global_quad_port_a = 0;
break;
}
return;
}
/*
* Enable PCI Wake On Lan capability
*/
static void
em_enable_wakeup(device_t dev)
{
struct adapter *adapter = device_get_softc(dev);
if_t ifp = adapter->ifp;
u32 pmc, ctrl, ctrl_ext, rctl;
u16 status;
if ((pci_find_cap(dev, PCIY_PMG, &pmc) != 0))
return;
/* Advertise the wakeup capability */
ctrl = E1000_READ_REG(&adapter->hw, E1000_CTRL);
ctrl |= (E1000_CTRL_SWDPIN2 | E1000_CTRL_SWDPIN3);
E1000_WRITE_REG(&adapter->hw, E1000_CTRL, ctrl);
E1000_WRITE_REG(&adapter->hw, E1000_WUC, E1000_WUC_PME_EN);
if ((adapter->hw.mac.type == e1000_ich8lan) ||
(adapter->hw.mac.type == e1000_pchlan) ||
(adapter->hw.mac.type == e1000_ich9lan) ||
(adapter->hw.mac.type == e1000_ich10lan))
e1000_suspend_workarounds_ich8lan(&adapter->hw);
/* Keep the laser running on Fiber adapters */
if (adapter->hw.phy.media_type == e1000_media_type_fiber ||
adapter->hw.phy.media_type == e1000_media_type_internal_serdes) {
ctrl_ext = E1000_READ_REG(&adapter->hw, E1000_CTRL_EXT);
ctrl_ext |= E1000_CTRL_EXT_SDP3_DATA;
E1000_WRITE_REG(&adapter->hw, E1000_CTRL_EXT, ctrl_ext);
}
/*
** Determine type of Wakeup: note that wol
** is set with all bits on by default.
*/
if ((if_getcapenable(ifp) & IFCAP_WOL_MAGIC) == 0)
adapter->wol &= ~E1000_WUFC_MAG;
if ((if_getcapenable(ifp) & IFCAP_WOL_MCAST) == 0)
adapter->wol &= ~E1000_WUFC_MC;
else {
rctl = E1000_READ_REG(&adapter->hw, E1000_RCTL);
rctl |= E1000_RCTL_MPE;
E1000_WRITE_REG(&adapter->hw, E1000_RCTL, rctl);
}
if ((adapter->hw.mac.type == e1000_pchlan) ||
(adapter->hw.mac.type == e1000_pch2lan)) {
if (em_enable_phy_wakeup(adapter))
return;
} else {
E1000_WRITE_REG(&adapter->hw, E1000_WUC, E1000_WUC_PME_EN);
E1000_WRITE_REG(&adapter->hw, E1000_WUFC, adapter->wol);
}
if (adapter->hw.phy.type == e1000_phy_igp_3)
e1000_igp3_phy_powerdown_workaround_ich8lan(&adapter->hw);
/* Request PME */
status = pci_read_config(dev, pmc + PCIR_POWER_STATUS, 2);
status &= ~(PCIM_PSTAT_PME | PCIM_PSTAT_PMEENABLE);
if (if_getcapenable(ifp) & IFCAP_WOL)
status |= PCIM_PSTAT_PME | PCIM_PSTAT_PMEENABLE;
pci_write_config(dev, pmc + PCIR_POWER_STATUS, status, 2);
return;
}
/*
** WOL in the newer chipset interfaces (pchlan)
** require thing to be copied into the phy
*/
static int
em_enable_phy_wakeup(struct adapter *adapter)
{
struct e1000_hw *hw = &adapter->hw;
u32 mreg, ret = 0;
u16 preg;
/* copy MAC RARs to PHY RARs */
e1000_copy_rx_addrs_to_phy_ich8lan(hw);
/* copy MAC MTA to PHY MTA */
for (int i = 0; i < adapter->hw.mac.mta_reg_count; i++) {
mreg = E1000_READ_REG_ARRAY(hw, E1000_MTA, i);
e1000_write_phy_reg(hw, BM_MTA(i), (u16)(mreg & 0xFFFF));
e1000_write_phy_reg(hw, BM_MTA(i) + 1,
(u16)((mreg >> 16) & 0xFFFF));
}
/* configure PHY Rx Control register */
e1000_read_phy_reg(&adapter->hw, BM_RCTL, &preg);
mreg = E1000_READ_REG(hw, E1000_RCTL);
if (mreg & E1000_RCTL_UPE)
preg |= BM_RCTL_UPE;
if (mreg & E1000_RCTL_MPE)
preg |= BM_RCTL_MPE;
preg &= ~(BM_RCTL_MO_MASK);
if (mreg & E1000_RCTL_MO_3)
preg |= (((mreg & E1000_RCTL_MO_3) >> E1000_RCTL_MO_SHIFT)
<< BM_RCTL_MO_SHIFT);
if (mreg & E1000_RCTL_BAM)
preg |= BM_RCTL_BAM;
if (mreg & E1000_RCTL_PMCF)
preg |= BM_RCTL_PMCF;
mreg = E1000_READ_REG(hw, E1000_CTRL);
if (mreg & E1000_CTRL_RFCE)
preg |= BM_RCTL_RFCE;
e1000_write_phy_reg(&adapter->hw, BM_RCTL, preg);
/* enable PHY wakeup in MAC register */
E1000_WRITE_REG(hw, E1000_WUC,
E1000_WUC_PHY_WAKE | E1000_WUC_PME_EN);
E1000_WRITE_REG(hw, E1000_WUFC, adapter->wol);
/* configure and enable PHY wakeup in PHY registers */
e1000_write_phy_reg(&adapter->hw, BM_WUFC, adapter->wol);
e1000_write_phy_reg(&adapter->hw, BM_WUC, E1000_WUC_PME_EN);
/* activate PHY wakeup */
ret = hw->phy.ops.acquire(hw);
if (ret) {
printf("Could not acquire PHY\n");
return ret;
}
e1000_write_phy_reg_mdic(hw, IGP01E1000_PHY_PAGE_SELECT,
(BM_WUC_ENABLE_PAGE << IGP_PAGE_SHIFT));
ret = e1000_read_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, &preg);
if (ret) {
printf("Could not read PHY page 769\n");
goto out;
}
preg |= BM_WUC_ENABLE_BIT | BM_WUC_HOST_WU_BIT;
ret = e1000_write_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, preg);
if (ret)
printf("Could not set PHY Host Wakeup bit\n");
out:
hw->phy.ops.release(hw);
return ret;
}
static void
em_led_func(void *arg, int onoff)
{
struct adapter *adapter = arg;
EM_CORE_LOCK(adapter);
if (onoff) {
e1000_setup_led(&adapter->hw);
e1000_led_on(&adapter->hw);
} else {
e1000_led_off(&adapter->hw);
e1000_cleanup_led(&adapter->hw);
}
EM_CORE_UNLOCK(adapter);
}
/*
** Disable the L0S and L1 LINK states
*/
static void
em_disable_aspm(struct adapter *adapter)
{
int base, reg;
u16 link_cap,link_ctrl;
device_t dev = adapter->dev;
switch (adapter->hw.mac.type) {
case e1000_82573:
case e1000_82574:
case e1000_82583:
break;
default:
return;
}
if (pci_find_cap(dev, PCIY_EXPRESS, &base) != 0)
return;
reg = base + PCIER_LINK_CAP;
link_cap = pci_read_config(dev, reg, 2);
if ((link_cap & PCIEM_LINK_CAP_ASPM) == 0)
return;
reg = base + PCIER_LINK_CTL;
link_ctrl = pci_read_config(dev, reg, 2);
link_ctrl &= ~PCIEM_LINK_CTL_ASPMC;
pci_write_config(dev, reg, link_ctrl, 2);
return;
}
/**********************************************************************
*
* Update the board statistics counters.
*
**********************************************************************/
static void
em_update_stats_counters(struct adapter *adapter)
{
if(adapter->hw.phy.media_type == e1000_media_type_copper ||
(E1000_READ_REG(&adapter->hw, E1000_STATUS) & E1000_STATUS_LU)) {
adapter->stats.symerrs += E1000_READ_REG(&adapter->hw, E1000_SYMERRS);
adapter->stats.sec += E1000_READ_REG(&adapter->hw, E1000_SEC);
}
adapter->stats.crcerrs += E1000_READ_REG(&adapter->hw, E1000_CRCERRS);
adapter->stats.mpc += E1000_READ_REG(&adapter->hw, E1000_MPC);
adapter->stats.scc += E1000_READ_REG(&adapter->hw, E1000_SCC);
adapter->stats.ecol += E1000_READ_REG(&adapter->hw, E1000_ECOL);
adapter->stats.mcc += E1000_READ_REG(&adapter->hw, E1000_MCC);
adapter->stats.latecol += E1000_READ_REG(&adapter->hw, E1000_LATECOL);
adapter->stats.colc += E1000_READ_REG(&adapter->hw, E1000_COLC);
adapter->stats.dc += E1000_READ_REG(&adapter->hw, E1000_DC);
adapter->stats.rlec += E1000_READ_REG(&adapter->hw, E1000_RLEC);
adapter->stats.xonrxc += E1000_READ_REG(&adapter->hw, E1000_XONRXC);
adapter->stats.xontxc += E1000_READ_REG(&adapter->hw, E1000_XONTXC);
adapter->stats.xoffrxc += E1000_READ_REG(&adapter->hw, E1000_XOFFRXC);
adapter->stats.xofftxc += E1000_READ_REG(&adapter->hw, E1000_XOFFTXC);
adapter->stats.fcruc += E1000_READ_REG(&adapter->hw, E1000_FCRUC);
adapter->stats.prc64 += E1000_READ_REG(&adapter->hw, E1000_PRC64);
adapter->stats.prc127 += E1000_READ_REG(&adapter->hw, E1000_PRC127);
adapter->stats.prc255 += E1000_READ_REG(&adapter->hw, E1000_PRC255);
adapter->stats.prc511 += E1000_READ_REG(&adapter->hw, E1000_PRC511);
adapter->stats.prc1023 += E1000_READ_REG(&adapter->hw, E1000_PRC1023);
adapter->stats.prc1522 += E1000_READ_REG(&adapter->hw, E1000_PRC1522);
adapter->stats.gprc += E1000_READ_REG(&adapter->hw, E1000_GPRC);
adapter->stats.bprc += E1000_READ_REG(&adapter->hw, E1000_BPRC);
adapter->stats.mprc += E1000_READ_REG(&adapter->hw, E1000_MPRC);
adapter->stats.gptc += E1000_READ_REG(&adapter->hw, E1000_GPTC);
/* For the 64-bit byte counters the low dword must be read first. */
/* Both registers clear on the read of the high dword */
adapter->stats.gorc += E1000_READ_REG(&adapter->hw, E1000_GORCL) +
((u64)E1000_READ_REG(&adapter->hw, E1000_GORCH) << 32);
adapter->stats.gotc += E1000_READ_REG(&adapter->hw, E1000_GOTCL) +
((u64)E1000_READ_REG(&adapter->hw, E1000_GOTCH) << 32);
adapter->stats.rnbc += E1000_READ_REG(&adapter->hw, E1000_RNBC);
adapter->stats.ruc += E1000_READ_REG(&adapter->hw, E1000_RUC);
adapter->stats.rfc += E1000_READ_REG(&adapter->hw, E1000_RFC);
adapter->stats.roc += E1000_READ_REG(&adapter->hw, E1000_ROC);
adapter->stats.rjc += E1000_READ_REG(&adapter->hw, E1000_RJC);
adapter->stats.tor += E1000_READ_REG(&adapter->hw, E1000_TORH);
adapter->stats.tot += E1000_READ_REG(&adapter->hw, E1000_TOTH);
adapter->stats.tpr += E1000_READ_REG(&adapter->hw, E1000_TPR);
adapter->stats.tpt += E1000_READ_REG(&adapter->hw, E1000_TPT);
adapter->stats.ptc64 += E1000_READ_REG(&adapter->hw, E1000_PTC64);
adapter->stats.ptc127 += E1000_READ_REG(&adapter->hw, E1000_PTC127);
adapter->stats.ptc255 += E1000_READ_REG(&adapter->hw, E1000_PTC255);
adapter->stats.ptc511 += E1000_READ_REG(&adapter->hw, E1000_PTC511);
adapter->stats.ptc1023 += E1000_READ_REG(&adapter->hw, E1000_PTC1023);
adapter->stats.ptc1522 += E1000_READ_REG(&adapter->hw, E1000_PTC1522);
adapter->stats.mptc += E1000_READ_REG(&adapter->hw, E1000_MPTC);
adapter->stats.bptc += E1000_READ_REG(&adapter->hw, E1000_BPTC);
/* Interrupt Counts */
adapter->stats.iac += E1000_READ_REG(&adapter->hw, E1000_IAC);
adapter->stats.icrxptc += E1000_READ_REG(&adapter->hw, E1000_ICRXPTC);
adapter->stats.icrxatc += E1000_READ_REG(&adapter->hw, E1000_ICRXATC);
adapter->stats.ictxptc += E1000_READ_REG(&adapter->hw, E1000_ICTXPTC);
adapter->stats.ictxatc += E1000_READ_REG(&adapter->hw, E1000_ICTXATC);
adapter->stats.ictxqec += E1000_READ_REG(&adapter->hw, E1000_ICTXQEC);
adapter->stats.ictxqmtc += E1000_READ_REG(&adapter->hw, E1000_ICTXQMTC);
adapter->stats.icrxdmtc += E1000_READ_REG(&adapter->hw, E1000_ICRXDMTC);
adapter->stats.icrxoc += E1000_READ_REG(&adapter->hw, E1000_ICRXOC);
if (adapter->hw.mac.type >= e1000_82543) {
adapter->stats.algnerrc +=
E1000_READ_REG(&adapter->hw, E1000_ALGNERRC);
adapter->stats.rxerrc +=
E1000_READ_REG(&adapter->hw, E1000_RXERRC);
adapter->stats.tncrs +=
E1000_READ_REG(&adapter->hw, E1000_TNCRS);
adapter->stats.cexterr +=
E1000_READ_REG(&adapter->hw, E1000_CEXTERR);
adapter->stats.tsctc +=
E1000_READ_REG(&adapter->hw, E1000_TSCTC);
adapter->stats.tsctfc +=
E1000_READ_REG(&adapter->hw, E1000_TSCTFC);
}
}
static uint64_t
em_get_counter(if_t ifp, ift_counter cnt)
{
struct adapter *adapter;
adapter = if_getsoftc(ifp);
switch (cnt) {
case IFCOUNTER_COLLISIONS:
return (adapter->stats.colc);
case IFCOUNTER_IERRORS:
return (adapter->dropped_pkts + adapter->stats.rxerrc +
adapter->stats.crcerrs + adapter->stats.algnerrc +
adapter->stats.ruc + adapter->stats.roc +
adapter->stats.mpc + adapter->stats.cexterr);
case IFCOUNTER_OERRORS:
return (adapter->stats.ecol + adapter->stats.latecol +
adapter->watchdog_events);
default:
return (if_get_counter_default(ifp, cnt));
}
}
/* Export a single 32-bit register via a read-only sysctl. */
static int
em_sysctl_reg_handler(SYSCTL_HANDLER_ARGS)
{
struct adapter *adapter;
u_int val;
adapter = oidp->oid_arg1;
val = E1000_READ_REG(&adapter->hw, oidp->oid_arg2);
return (sysctl_handle_int(oidp, &val, 0, req));
}
/*
* Add sysctl variables, one per statistic, to the system.
*/
static void
em_add_hw_stats(struct adapter *adapter)
{
device_t dev = adapter->dev;
struct tx_ring *txr = adapter->tx_rings;
struct rx_ring *rxr = adapter->rx_rings;
struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(dev);
struct sysctl_oid *tree = device_get_sysctl_tree(dev);
struct sysctl_oid_list *child = SYSCTL_CHILDREN(tree);
struct e1000_hw_stats *stats = &adapter->stats;
struct sysctl_oid *stat_node, *queue_node, *int_node;
struct sysctl_oid_list *stat_list, *queue_list, *int_list;
#define QUEUE_NAME_LEN 32
char namebuf[QUEUE_NAME_LEN];
/* Driver Statistics */
SYSCTL_ADD_ULONG(ctx, child, OID_AUTO, "link_irq",
CTLFLAG_RD, &adapter->link_irq,
"Link MSIX IRQ Handled");
SYSCTL_ADD_ULONG(ctx, child, OID_AUTO, "mbuf_alloc_fail",
CTLFLAG_RD, &adapter->mbuf_alloc_failed,
"Std mbuf failed");
SYSCTL_ADD_ULONG(ctx, child, OID_AUTO, "cluster_alloc_fail",
CTLFLAG_RD, &adapter->mbuf_cluster_failed,
"Std mbuf cluster failed");
SYSCTL_ADD_ULONG(ctx, child, OID_AUTO, "dropped",
CTLFLAG_RD, &adapter->dropped_pkts,
"Driver dropped packets");
SYSCTL_ADD_ULONG(ctx, child, OID_AUTO, "tx_dma_fail",
CTLFLAG_RD, &adapter->no_tx_dma_setup,
"Driver tx dma failure in xmit");
SYSCTL_ADD_ULONG(ctx, child, OID_AUTO, "rx_overruns",
CTLFLAG_RD, &adapter->rx_overruns,
"RX overruns");
SYSCTL_ADD_ULONG(ctx, child, OID_AUTO, "watchdog_timeouts",
CTLFLAG_RD, &adapter->watchdog_events,
"Watchdog timeouts");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "device_control",
CTLTYPE_UINT | CTLFLAG_RD, adapter, E1000_CTRL,
em_sysctl_reg_handler, "IU",
"Device Control Register");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "rx_control",
CTLTYPE_UINT | CTLFLAG_RD, adapter, E1000_RCTL,
em_sysctl_reg_handler, "IU",
"Receiver Control Register");
SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "fc_high_water",
CTLFLAG_RD, &adapter->hw.fc.high_water, 0,
"Flow Control High Watermark");
SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "fc_low_water",
CTLFLAG_RD, &adapter->hw.fc.low_water, 0,
"Flow Control Low Watermark");
for (int i = 0; i < adapter->num_queues; i++, txr++, rxr++) {
snprintf(namebuf, QUEUE_NAME_LEN, "queue_tx_%d", i);
queue_node = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, namebuf,
CTLFLAG_RD, NULL, "TX Queue Name");
queue_list = SYSCTL_CHILDREN(queue_node);
SYSCTL_ADD_PROC(ctx, queue_list, OID_AUTO, "txd_head",
CTLTYPE_UINT | CTLFLAG_RD, adapter,
E1000_TDH(txr->me),
em_sysctl_reg_handler, "IU",
"Transmit Descriptor Head");
SYSCTL_ADD_PROC(ctx, queue_list, OID_AUTO, "txd_tail",
CTLTYPE_UINT | CTLFLAG_RD, adapter,
E1000_TDT(txr->me),
em_sysctl_reg_handler, "IU",
"Transmit Descriptor Tail");
SYSCTL_ADD_ULONG(ctx, queue_list, OID_AUTO, "tx_irq",
CTLFLAG_RD, &txr->tx_irq,
"Queue MSI-X Transmit Interrupts");
SYSCTL_ADD_ULONG(ctx, queue_list, OID_AUTO, "no_desc_avail",
CTLFLAG_RD, &txr->no_desc_avail,
"Queue No Descriptor Available");
snprintf(namebuf, QUEUE_NAME_LEN, "queue_rx_%d", i);
queue_node = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, namebuf,
CTLFLAG_RD, NULL, "RX Queue Name");
queue_list = SYSCTL_CHILDREN(queue_node);
SYSCTL_ADD_PROC(ctx, queue_list, OID_AUTO, "rxd_head",
CTLTYPE_UINT | CTLFLAG_RD, adapter,
E1000_RDH(rxr->me),
em_sysctl_reg_handler, "IU",
"Receive Descriptor Head");
SYSCTL_ADD_PROC(ctx, queue_list, OID_AUTO, "rxd_tail",
CTLTYPE_UINT | CTLFLAG_RD, adapter,
E1000_RDT(rxr->me),
em_sysctl_reg_handler, "IU",
"Receive Descriptor Tail");
SYSCTL_ADD_ULONG(ctx, queue_list, OID_AUTO, "rx_irq",
CTLFLAG_RD, &rxr->rx_irq,
"Queue MSI-X Receive Interrupts");
}
/* MAC stats get their own sub node */
stat_node = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, "mac_stats",
CTLFLAG_RD, NULL, "Statistics");
stat_list = SYSCTL_CHILDREN(stat_node);
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "excess_coll",
CTLFLAG_RD, &stats->ecol,
"Excessive collisions");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "single_coll",
CTLFLAG_RD, &stats->scc,
"Single collisions");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "multiple_coll",
CTLFLAG_RD, &stats->mcc,
"Multiple collisions");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "late_coll",
CTLFLAG_RD, &stats->latecol,
"Late collisions");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "collision_count",
CTLFLAG_RD, &stats->colc,
"Collision Count");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "symbol_errors",
CTLFLAG_RD, &adapter->stats.symerrs,
"Symbol Errors");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "sequence_errors",
CTLFLAG_RD, &adapter->stats.sec,
"Sequence Errors");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "defer_count",
CTLFLAG_RD, &adapter->stats.dc,
"Defer Count");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "missed_packets",
CTLFLAG_RD, &adapter->stats.mpc,
"Missed Packets");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "recv_no_buff",
CTLFLAG_RD, &adapter->stats.rnbc,
"Receive No Buffers");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "recv_undersize",
CTLFLAG_RD, &adapter->stats.ruc,
"Receive Undersize");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "recv_fragmented",
CTLFLAG_RD, &adapter->stats.rfc,
"Fragmented Packets Received ");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "recv_oversize",
CTLFLAG_RD, &adapter->stats.roc,
"Oversized Packets Received");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "recv_jabber",
CTLFLAG_RD, &adapter->stats.rjc,
"Recevied Jabber");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "recv_errs",
CTLFLAG_RD, &adapter->stats.rxerrc,
"Receive Errors");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "crc_errs",
CTLFLAG_RD, &adapter->stats.crcerrs,
"CRC errors");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "alignment_errs",
CTLFLAG_RD, &adapter->stats.algnerrc,
"Alignment Errors");
/* On 82575 these are collision counts */
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "coll_ext_errs",
CTLFLAG_RD, &adapter->stats.cexterr,
"Collision/Carrier extension errors");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "xon_recvd",
CTLFLAG_RD, &adapter->stats.xonrxc,
"XON Received");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "xon_txd",
CTLFLAG_RD, &adapter->stats.xontxc,
"XON Transmitted");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "xoff_recvd",
CTLFLAG_RD, &adapter->stats.xoffrxc,
"XOFF Received");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "xoff_txd",
CTLFLAG_RD, &adapter->stats.xofftxc,
"XOFF Transmitted");
/* Packet Reception Stats */
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "total_pkts_recvd",
CTLFLAG_RD, &adapter->stats.tpr,
"Total Packets Received ");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "good_pkts_recvd",
CTLFLAG_RD, &adapter->stats.gprc,
"Good Packets Received");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "bcast_pkts_recvd",
CTLFLAG_RD, &adapter->stats.bprc,
"Broadcast Packets Received");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "mcast_pkts_recvd",
CTLFLAG_RD, &adapter->stats.mprc,
"Multicast Packets Received");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "rx_frames_64",
CTLFLAG_RD, &adapter->stats.prc64,
"64 byte frames received ");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "rx_frames_65_127",
CTLFLAG_RD, &adapter->stats.prc127,
"65-127 byte frames received");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "rx_frames_128_255",
CTLFLAG_RD, &adapter->stats.prc255,
"128-255 byte frames received");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "rx_frames_256_511",
CTLFLAG_RD, &adapter->stats.prc511,
"256-511 byte frames received");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "rx_frames_512_1023",
CTLFLAG_RD, &adapter->stats.prc1023,
"512-1023 byte frames received");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "rx_frames_1024_1522",
CTLFLAG_RD, &adapter->stats.prc1522,
"1023-1522 byte frames received");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "good_octets_recvd",
CTLFLAG_RD, &adapter->stats.gorc,
"Good Octets Received");
/* Packet Transmission Stats */
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "good_octets_txd",
CTLFLAG_RD, &adapter->stats.gotc,
"Good Octets Transmitted");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "total_pkts_txd",
CTLFLAG_RD, &adapter->stats.tpt,
"Total Packets Transmitted");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "good_pkts_txd",
CTLFLAG_RD, &adapter->stats.gptc,
"Good Packets Transmitted");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "bcast_pkts_txd",
CTLFLAG_RD, &adapter->stats.bptc,
"Broadcast Packets Transmitted");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "mcast_pkts_txd",
CTLFLAG_RD, &adapter->stats.mptc,
"Multicast Packets Transmitted");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "tx_frames_64",
CTLFLAG_RD, &adapter->stats.ptc64,
"64 byte frames transmitted ");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "tx_frames_65_127",
CTLFLAG_RD, &adapter->stats.ptc127,
"65-127 byte frames transmitted");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "tx_frames_128_255",
CTLFLAG_RD, &adapter->stats.ptc255,
"128-255 byte frames transmitted");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "tx_frames_256_511",
CTLFLAG_RD, &adapter->stats.ptc511,
"256-511 byte frames transmitted");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "tx_frames_512_1023",
CTLFLAG_RD, &adapter->stats.ptc1023,
"512-1023 byte frames transmitted");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "tx_frames_1024_1522",
CTLFLAG_RD, &adapter->stats.ptc1522,
"1024-1522 byte frames transmitted");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "tso_txd",
CTLFLAG_RD, &adapter->stats.tsctc,
"TSO Contexts Transmitted");
SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "tso_ctx_fail",
CTLFLAG_RD, &adapter->stats.tsctfc,
"TSO Contexts Failed");
/* Interrupt Stats */
int_node = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, "interrupts",
CTLFLAG_RD, NULL, "Interrupt Statistics");
int_list = SYSCTL_CHILDREN(int_node);
SYSCTL_ADD_UQUAD(ctx, int_list, OID_AUTO, "asserts",
CTLFLAG_RD, &adapter->stats.iac,
"Interrupt Assertion Count");
SYSCTL_ADD_UQUAD(ctx, int_list, OID_AUTO, "rx_pkt_timer",
CTLFLAG_RD, &adapter->stats.icrxptc,
"Interrupt Cause Rx Pkt Timer Expire Count");
SYSCTL_ADD_UQUAD(ctx, int_list, OID_AUTO, "rx_abs_timer",
CTLFLAG_RD, &adapter->stats.icrxatc,
"Interrupt Cause Rx Abs Timer Expire Count");
SYSCTL_ADD_UQUAD(ctx, int_list, OID_AUTO, "tx_pkt_timer",
CTLFLAG_RD, &adapter->stats.ictxptc,
"Interrupt Cause Tx Pkt Timer Expire Count");
SYSCTL_ADD_UQUAD(ctx, int_list, OID_AUTO, "tx_abs_timer",
CTLFLAG_RD, &adapter->stats.ictxatc,
"Interrupt Cause Tx Abs Timer Expire Count");
SYSCTL_ADD_UQUAD(ctx, int_list, OID_AUTO, "tx_queue_empty",
CTLFLAG_RD, &adapter->stats.ictxqec,
"Interrupt Cause Tx Queue Empty Count");
SYSCTL_ADD_UQUAD(ctx, int_list, OID_AUTO, "tx_queue_min_thresh",
CTLFLAG_RD, &adapter->stats.ictxqmtc,
"Interrupt Cause Tx Queue Min Thresh Count");
SYSCTL_ADD_UQUAD(ctx, int_list, OID_AUTO, "rx_desc_min_thresh",
CTLFLAG_RD, &adapter->stats.icrxdmtc,
"Interrupt Cause Rx Desc Min Thresh Count");
SYSCTL_ADD_UQUAD(ctx, int_list, OID_AUTO, "rx_overrun",
CTLFLAG_RD, &adapter->stats.icrxoc,
"Interrupt Cause Receiver Overrun Count");
}
/**********************************************************************
*
* This routine provides a way to dump out the adapter eeprom,
* often a useful debug/service tool. This only dumps the first
* 32 words, stuff that matters is in that extent.
*
**********************************************************************/
static int
em_sysctl_nvm_info(SYSCTL_HANDLER_ARGS)
{
struct adapter *adapter = (struct adapter *)arg1;
int error;
int result;
result = -1;
error = sysctl_handle_int(oidp, &result, 0, req);
if (error || !req->newptr)
return (error);
/*
* This value will cause a hex dump of the
* first 32 16-bit words of the EEPROM to
* the screen.
*/
if (result == 1)
em_print_nvm_info(adapter);
return (error);
}
static void
em_print_nvm_info(struct adapter *adapter)
{
u16 eeprom_data;
int i, j, row = 0;
/* Its a bit crude, but it gets the job done */
printf("\nInterface EEPROM Dump:\n");
printf("Offset\n0x0000 ");
for (i = 0, j = 0; i < 32; i++, j++) {
if (j == 8) { /* Make the offset block */
j = 0; ++row;
printf("\n0x00%x0 ",row);
}
e1000_read_nvm(&adapter->hw, i, 1, &eeprom_data);
printf("%04x ", eeprom_data);
}
printf("\n");
}
static int
em_sysctl_int_delay(SYSCTL_HANDLER_ARGS)
{
struct em_int_delay_info *info;
struct adapter *adapter;
u32 regval;
int error, usecs, ticks;
info = (struct em_int_delay_info *)arg1;
usecs = info->value;
error = sysctl_handle_int(oidp, &usecs, 0, req);
if (error != 0 || req->newptr == NULL)
return (error);
if (usecs < 0 || usecs > EM_TICKS_TO_USECS(65535))
return (EINVAL);
info->value = usecs;
ticks = EM_USECS_TO_TICKS(usecs);
if (info->offset == E1000_ITR) /* units are 256ns here */
ticks *= 4;
adapter = info->adapter;
EM_CORE_LOCK(adapter);
regval = E1000_READ_OFFSET(&adapter->hw, info->offset);
regval = (regval & ~0xffff) | (ticks & 0xffff);
/* Handle a few special cases. */
switch (info->offset) {
case E1000_RDTR:
break;
case E1000_TIDV:
if (ticks == 0) {
adapter->txd_cmd &= ~E1000_TXD_CMD_IDE;
/* Don't write 0 into the TIDV register. */
regval++;
} else
adapter->txd_cmd |= E1000_TXD_CMD_IDE;
break;
}
E1000_WRITE_OFFSET(&adapter->hw, info->offset, regval);
EM_CORE_UNLOCK(adapter);
return (0);
}
static void
em_add_int_delay_sysctl(struct adapter *adapter, const char *name,
const char *description, struct em_int_delay_info *info,
int offset, int value)
{
info->adapter = adapter;
info->offset = offset;
info->value = value;
SYSCTL_ADD_PROC(device_get_sysctl_ctx(adapter->dev),
SYSCTL_CHILDREN(device_get_sysctl_tree(adapter->dev)),
OID_AUTO, name, CTLTYPE_INT|CTLFLAG_RW,
info, 0, em_sysctl_int_delay, "I", description);
}
static void
em_set_sysctl_value(struct adapter *adapter, const char *name,
const char *description, int *limit, int value)
{
*limit = value;
SYSCTL_ADD_INT(device_get_sysctl_ctx(adapter->dev),
SYSCTL_CHILDREN(device_get_sysctl_tree(adapter->dev)),
OID_AUTO, name, CTLFLAG_RW, limit, value, description);
}
/*
** Set flow control using sysctl:
** Flow control values:
** 0 - off
** 1 - rx pause
** 2 - tx pause
** 3 - full
*/
static int
em_set_flowcntl(SYSCTL_HANDLER_ARGS)
{
int error;
static int input = 3; /* default is full */
struct adapter *adapter = (struct adapter *) arg1;
error = sysctl_handle_int(oidp, &input, 0, req);
if ((error) || (req->newptr == NULL))
return (error);
if (input == adapter->fc) /* no change? */
return (error);
switch (input) {
case e1000_fc_rx_pause:
case e1000_fc_tx_pause:
case e1000_fc_full:
case e1000_fc_none:
adapter->hw.fc.requested_mode = input;
adapter->fc = input;
break;
default:
/* Do nothing */
return (error);
}
adapter->hw.fc.current_mode = adapter->hw.fc.requested_mode;
e1000_force_mac_fc(&adapter->hw);
return (error);
}
/*
** Manage Energy Efficient Ethernet:
** Control values:
** 0/1 - enabled/disabled
*/
static int
em_sysctl_eee(SYSCTL_HANDLER_ARGS)
{
struct adapter *adapter = (struct adapter *) arg1;
int error, value;
value = adapter->hw.dev_spec.ich8lan.eee_disable;
error = sysctl_handle_int(oidp, &value, 0, req);
if (error || req->newptr == NULL)
return (error);
EM_CORE_LOCK(adapter);
adapter->hw.dev_spec.ich8lan.eee_disable = (value != 0);
em_init_locked(adapter);
EM_CORE_UNLOCK(adapter);
return (0);
}
static int
em_sysctl_debug_info(SYSCTL_HANDLER_ARGS)
{
struct adapter *adapter;
int error;
int result;
result = -1;
error = sysctl_handle_int(oidp, &result, 0, req);
if (error || !req->newptr)
return (error);
if (result == 1) {
adapter = (struct adapter *)arg1;
em_print_debug_info(adapter);
}
return (error);
}
/*
** This routine is meant to be fluid, add whatever is
** needed for debugging a problem. -jfv
*/
static void
em_print_debug_info(struct adapter *adapter)
{
device_t dev = adapter->dev;
struct tx_ring *txr = adapter->tx_rings;
struct rx_ring *rxr = adapter->rx_rings;
if (if_getdrvflags(adapter->ifp) & IFF_DRV_RUNNING)
printf("Interface is RUNNING ");
else
printf("Interface is NOT RUNNING\n");
if (if_getdrvflags(adapter->ifp) & IFF_DRV_OACTIVE)
printf("and INACTIVE\n");
else
printf("and ACTIVE\n");
for (int i = 0; i < adapter->num_queues; i++, txr++, rxr++) {
device_printf(dev, "TX Queue %d ------\n", i);
device_printf(dev, "hw tdh = %d, hw tdt = %d\n",
E1000_READ_REG(&adapter->hw, E1000_TDH(i)),
E1000_READ_REG(&adapter->hw, E1000_TDT(i)));
device_printf(dev, "Tx Queue Status = %d\n", txr->busy);
device_printf(dev, "TX descriptors avail = %d\n",
txr->tx_avail);
device_printf(dev, "Tx Descriptors avail failure = %ld\n",
txr->no_desc_avail);
device_printf(dev, "RX Queue %d ------\n", i);
device_printf(dev, "hw rdh = %d, hw rdt = %d\n",
E1000_READ_REG(&adapter->hw, E1000_RDH(i)),
E1000_READ_REG(&adapter->hw, E1000_RDT(i)));
device_printf(dev, "RX discarded packets = %ld\n",
rxr->rx_discarded);
device_printf(dev, "RX Next to Check = %d\n", rxr->next_to_check);
device_printf(dev, "RX Next to Refresh = %d\n", rxr->next_to_refresh);
}
}
#ifdef EM_MULTIQUEUE
/*
* 82574 only:
* Write a new value to the EEPROM increasing the number of MSIX
* vectors from 3 to 5, for proper multiqueue support.
*/
static void
em_enable_vectors_82574(struct adapter *adapter)
{
struct e1000_hw *hw = &adapter->hw;
device_t dev = adapter->dev;
u16 edata;
e1000_read_nvm(hw, EM_NVM_PCIE_CTRL, 1, &edata);
printf("Current cap: %#06x\n", edata);
if (((edata & EM_NVM_MSIX_N_MASK) >> EM_NVM_MSIX_N_SHIFT) != 4) {
device_printf(dev, "Writing to eeprom: increasing "
"reported MSIX vectors from 3 to 5...\n");
edata &= ~(EM_NVM_MSIX_N_MASK);
edata |= 4 << EM_NVM_MSIX_N_SHIFT;
e1000_write_nvm(hw, EM_NVM_PCIE_CTRL, 1, &edata);
e1000_update_nvm_checksum(hw);
device_printf(dev, "Writing to eeprom: done\n");
}
}
#endif
#ifdef DDB
DB_COMMAND(em_reset_dev, em_ddb_reset_dev)
{
devclass_t dc;
int max_em;
dc = devclass_find("em");
max_em = devclass_get_maxunit(dc);
for (int index = 0; index < (max_em - 1); index++) {
device_t dev;
dev = devclass_get_device(dc, index);
if (device_get_driver(dev) == &em_driver) {
struct adapter *adapter = device_get_softc(dev);
em_init_locked(adapter);
}
}
}
DB_COMMAND(em_dump_queue, em_ddb_dump_queue)
{
devclass_t dc;
int max_em;
dc = devclass_find("em");
max_em = devclass_get_maxunit(dc);
for (int index = 0; index < (max_em - 1); index++) {
device_t dev;
dev = devclass_get_device(dc, index);
if (device_get_driver(dev) == &em_driver)
em_print_debug_info(device_get_softc(dev));
}
}
#endif
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