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freebsd-skq/sys/dev/ixl/ixl.h
Eric Joyner 37761e2eda ixl/iavf(4): Fix TSO offloads when TXCSUM is disabled 
From Jake:
The iflib stack does not disable TSO automatically when TXCSUM is
disabled, instead assuming that the driver will correctly handle TSOs
even when CSUM_IP is not set.

This results in iflib calling ixl_isc_txd_encap with packets which have
CSUM_IP_TSO, but do not have CSUM_IP or CSUM_IP_TCP set. Because of
this, ixl_tx_setup_offload will not setup the IPv4 checksum offloading.

This results in bad TSO packets being sent if a user disables TXCSUM
without disabling TSO.

Fix this by updating the ixl_tx_setup_offload function to check both
CSUM_IP and CSUM_IP_TSO when deciding whether to enable IPv4 checksums.

Once this is corrected, another issue for TSO packets is revealed. The
driver sets IFLIB_NEED_ZERO_CSUM in order to enable a work around that
causes the ip->sum field to be zero'd. This is necessary for ixl
hardware to correctly perform TSOs.

However, if TXCSUM is disabled, then the work around is not enabled, as
CSUM_IP will not be set when the iflib stack checks to see if it should
clear the sum field.

Fix this by adding IFLIB_TSO_INIT_IP to the iflib flags for the iavf and
ixl interface files.

It is uncertain if the hardware needs IFLIB_NEED_ZERO_CSUM for any other
case besides TSO, so leave that flag assigned. It may be worth
investigating to see if this work around flag could be disabled in
a future change.

Once both of these changes are made, the ixl driver should correctly
offload TSO packets when TSO4 offload is enabled, regardless of whether
TXCSUM is enabled or disabled.

Submitted by:	Jacob Keller <jacob.e.keller@intel.com>
Reviewed by:	erj@, shurd@
MFC after:	0 days
Sponsored by:	Intel Corporation
Differential Revision:	https://reviews.freebsd.org/D17900
2018-11-08 19:10:43 +00:00

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/******************************************************************************
Copyright (c) 2013-2018, 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.
******************************************************************************/
/*$FreeBSD$*/
#ifndef _IXL_H_
#define _IXL_H_
#include "opt_inet.h"
#include "opt_inet6.h"
#include "opt_rss.h"
#include "opt_ixl.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf_ring.h>
#include <sys/mbuf.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/sockio.h>
#include <sys/eventhandler.h>
#include <sys/syslog.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_arp.h>
#include <net/bpf.h>
#include <net/ethernet.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/iflib.h>
#include <net/bpf.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/tcp_lro.h>
#include <netinet/udp.h>
#include <netinet/sctp.h>
#include <machine/in_cksum.h>
#include <sys/bus.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <machine/resource.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <machine/clock.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <sys/proc.h>
#include <sys/sysctl.h>
#include <sys/endian.h>
#include <sys/taskqueue.h>
#include <sys/pcpu.h>
#include <sys/smp.h>
#include <sys/sbuf.h>
#include <machine/smp.h>
#include <machine/stdarg.h>
#ifdef RSS
#include <net/rss_config.h>
#include <netinet/in_rss.h>
#endif
#include "ifdi_if.h"
#include "i40e_type.h"
#include "i40e_prototype.h"
#include "ixl_debug.h"
#define PVIDV(vendor, devid, name) \
PVID(vendor, devid, name " - " IXL_DRIVER_VERSION_STRING)
/* Tunables */
/*
* Ring Descriptors Valid Range: 32-4096 Default Value: 1024 This value is the
* number of tx/rx descriptors allocated by the driver. Increasing this
* value allows the driver to queue more operations.
*
* Tx descriptors are always 16 bytes, but Rx descriptors can be 32 bytes.
* The driver currently always uses 32 byte Rx descriptors.
*/
#define IXL_DEFAULT_RING 1024
#define IXL_MAX_RING 4096
#define IXL_MIN_RING 64
#define IXL_RING_INCREMENT 32
#define IXL_AQ_LEN 256
#define IXL_AQ_LEN_MAX 1024
/* Alignment for rings */
#define DBA_ALIGN 128
#define MAX_MULTICAST_ADDR 128
#define IXL_MSIX_BAR 3
#define IXL_ADM_LIMIT 2
#define IXL_TSO_SIZE ((255*1024)-1)
#define IXL_TX_BUF_SZ ((u32) 1514)
#define IXL_AQ_BUF_SZ ((u32) 4096)
#define IXL_RX_ITR 0
#define IXL_TX_ITR 1
#define IXL_ITR_NONE 3
#define IXL_QUEUE_EOL 0x7FF
#define IXL_MIN_FRAME 17
#define IXL_MAX_FRAME 9728
#define IXL_MAX_TX_SEGS 8
#define IXL_MAX_RX_SEGS 5
#define IXL_MAX_TSO_SEGS 128
#define IXL_SPARSE_CHAIN 7
#define IXL_MIN_TSO_MSS 64
#define IXL_MAX_TSO_MSS 9668
#define IXL_MAX_DMA_SEG_SIZE ((16 * 1024) - 1)
#define IXL_RSS_KEY_SIZE_REG 13
#define IXL_RSS_KEY_SIZE (IXL_RSS_KEY_SIZE_REG * 4)
#define IXL_RSS_VSI_LUT_SIZE 64 /* X722 -> VSI, X710 -> VF */
#define IXL_RSS_VSI_LUT_ENTRY_MASK 0x3F
#define IXL_RSS_VF_LUT_ENTRY_MASK 0xF
#define IXL_VF_MAX_BUFFER 0x3F80
#define IXL_VF_MAX_HDR_BUFFER 0x840
#define IXL_VF_MAX_FRAME 0x3FFF
/* ERJ: hardware can support ~2k (SW5+) filters between all functions */
#define IXL_MAX_FILTERS 256
#define IXL_NVM_VERSION_LO_SHIFT 0
#define IXL_NVM_VERSION_LO_MASK (0xff << IXL_NVM_VERSION_LO_SHIFT)
#define IXL_NVM_VERSION_HI_SHIFT 12
#define IXL_NVM_VERSION_HI_MASK (0xf << IXL_NVM_VERSION_HI_SHIFT)
/*
* Interrupt Moderation parameters
* Multiply ITR values by 2 for real ITR value
*/
#define IXL_MAX_ITR 0x0FF0
#define IXL_ITR_100K 0x0005
#define IXL_ITR_20K 0x0019
#define IXL_ITR_8K 0x003E
#define IXL_ITR_4K 0x007A
#define IXL_ITR_1K 0x01F4
#define IXL_ITR_DYNAMIC 0x8000
#define IXL_LOW_LATENCY 0
#define IXL_AVE_LATENCY 1
#define IXL_BULK_LATENCY 2
/* MacVlan Flags */
#define IXL_FILTER_USED (u16)(1 << 0)
#define IXL_FILTER_VLAN (u16)(1 << 1)
#define IXL_FILTER_ADD (u16)(1 << 2)
#define IXL_FILTER_DEL (u16)(1 << 3)
#define IXL_FILTER_MC (u16)(1 << 4)
/* used in the vlan field of the filter when not a vlan */
#define IXL_VLAN_ANY -1
#define CSUM_OFFLOAD_IPV4 (CSUM_IP|CSUM_TCP|CSUM_UDP|CSUM_SCTP)
#define CSUM_OFFLOAD_IPV6 (CSUM_TCP_IPV6|CSUM_UDP_IPV6|CSUM_SCTP_IPV6)
#define CSUM_OFFLOAD (CSUM_OFFLOAD_IPV4|CSUM_OFFLOAD_IPV6|CSUM_TSO)
#define IXL_VF_RESET_TIMEOUT 100
#define IXL_VSI_DATA_PORT 0x01
#define IAVF_MAX_QUEUES 16
#define IXL_MAX_VSI_QUEUES (2 * (I40E_VSILAN_QTABLE_MAX_INDEX + 1))
#define IXL_RX_CTX_BASE_UNITS 128
#define IXL_TX_CTX_BASE_UNITS 128
#define IXL_PF_PCI_CIAA_VF_DEVICE_STATUS 0xAA
#define IXL_PF_PCI_CIAD_VF_TRANS_PENDING_MASK 0x20
#define IXL_GLGEN_VFLRSTAT_INDEX(glb_vf) ((glb_vf) / 32)
#define IXL_GLGEN_VFLRSTAT_MASK(glb_vf) (1 << ((glb_vf) % 32))
#define IXL_MAX_ITR_IDX 3
#define IXL_END_OF_INTR_LNKLST 0x7FF
#define IXL_DEFAULT_RSS_HENA_BASE (\
BIT_ULL(I40E_FILTER_PCTYPE_NONF_IPV4_UDP) | \
BIT_ULL(I40E_FILTER_PCTYPE_NONF_IPV4_TCP) | \
BIT_ULL(I40E_FILTER_PCTYPE_NONF_IPV4_SCTP) | \
BIT_ULL(I40E_FILTER_PCTYPE_NONF_IPV4_OTHER) | \
BIT_ULL(I40E_FILTER_PCTYPE_FRAG_IPV4) | \
BIT_ULL(I40E_FILTER_PCTYPE_NONF_IPV6_UDP) | \
BIT_ULL(I40E_FILTER_PCTYPE_NONF_IPV6_TCP) | \
BIT_ULL(I40E_FILTER_PCTYPE_NONF_IPV6_SCTP) | \
BIT_ULL(I40E_FILTER_PCTYPE_NONF_IPV6_OTHER) | \
BIT_ULL(I40E_FILTER_PCTYPE_FRAG_IPV6) | \
BIT_ULL(I40E_FILTER_PCTYPE_L2_PAYLOAD))
#define IXL_DEFAULT_RSS_HENA_XL710 IXL_DEFAULT_RSS_HENA_BASE
#define IXL_DEFAULT_RSS_HENA_X722 (\
IXL_DEFAULT_RSS_HENA_BASE | \
BIT_ULL(I40E_FILTER_PCTYPE_NONF_UNICAST_IPV4_UDP) | \
BIT_ULL(I40E_FILTER_PCTYPE_NONF_MULTICAST_IPV4_UDP) | \
BIT_ULL(I40E_FILTER_PCTYPE_NONF_UNICAST_IPV6_UDP) | \
BIT_ULL(I40E_FILTER_PCTYPE_NONF_MULTICAST_IPV6_UDP) | \
BIT_ULL(I40E_FILTER_PCTYPE_NONF_IPV4_TCP_SYN_NO_ACK) | \
BIT_ULL(I40E_FILTER_PCTYPE_NONF_IPV6_TCP_SYN_NO_ACK))
#define IXL_CAPS \
(IFCAP_TSO4 | IFCAP_TSO6 | \
IFCAP_TXCSUM | IFCAP_TXCSUM_IPV6 | \
IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6 | \
IFCAP_VLAN_HWFILTER | IFCAP_VLAN_HWTSO | \
IFCAP_VLAN_HWTAGGING | IFCAP_VLAN_HWCSUM | \
IFCAP_VLAN_MTU | IFCAP_JUMBO_MTU | IFCAP_LRO)
#define IXL_CSUM_TCP \
(CSUM_IP_TCP|CSUM_IP_TSO|CSUM_IP6_TSO|CSUM_IP6_TCP)
#define IXL_CSUM_UDP \
(CSUM_IP_UDP|CSUM_IP6_UDP)
#define IXL_CSUM_SCTP \
(CSUM_IP_SCTP|CSUM_IP6_SCTP)
#define IXL_CSUM_IPV4 \
(CSUM_IP|CSUM_IP_TSO)
/* Pre-11 counter(9) compatibility */
#if __FreeBSD_version >= 1100036
#define IXL_SET_IPACKETS(vsi, count) (vsi)->ipackets = (count)
#define IXL_SET_IERRORS(vsi, count) (vsi)->ierrors = (count)
#define IXL_SET_OPACKETS(vsi, count) (vsi)->opackets = (count)
#define IXL_SET_OERRORS(vsi, count) (vsi)->oerrors = (count)
#define IXL_SET_COLLISIONS(vsi, count) /* Do nothing; collisions is always 0. */
#define IXL_SET_IBYTES(vsi, count) (vsi)->ibytes = (count)
#define IXL_SET_OBYTES(vsi, count) (vsi)->obytes = (count)
#define IXL_SET_IMCASTS(vsi, count) (vsi)->imcasts = (count)
#define IXL_SET_OMCASTS(vsi, count) (vsi)->omcasts = (count)
#define IXL_SET_IQDROPS(vsi, count) (vsi)->iqdrops = (count)
#define IXL_SET_OQDROPS(vsi, count) (vsi)->oqdrops = (count)
#define IXL_SET_NOPROTO(vsi, count) (vsi)->noproto = (count)
#else
#define IXL_SET_IPACKETS(vsi, count) (vsi)->ifp->if_ipackets = (count)
#define IXL_SET_IERRORS(vsi, count) (vsi)->ifp->if_ierrors = (count)
#define IXL_SET_OPACKETS(vsi, count) (vsi)->ifp->if_opackets = (count)
#define IXL_SET_OERRORS(vsi, count) (vsi)->ifp->if_oerrors = (count)
#define IXL_SET_COLLISIONS(vsi, count) (vsi)->ifp->if_collisions = (count)
#define IXL_SET_IBYTES(vsi, count) (vsi)->ifp->if_ibytes = (count)
#define IXL_SET_OBYTES(vsi, count) (vsi)->ifp->if_obytes = (count)
#define IXL_SET_IMCASTS(vsi, count) (vsi)->ifp->if_imcasts = (count)
#define IXL_SET_OMCASTS(vsi, count) (vsi)->ifp->if_omcasts = (count)
#define IXL_SET_IQDROPS(vsi, count) (vsi)->ifp->if_iqdrops = (count)
#define IXL_SET_OQDROPS(vsi, odrops) (vsi)->ifp->if_snd.ifq_drops = (odrops)
#define IXL_SET_NOPROTO(vsi, count) (vsi)->noproto = (count)
#endif
/* For stats sysctl naming */
#define QUEUE_NAME_LEN 32
#define IXL_DEV_ERR(_dev, _format, ...) \
device_printf(_dev, "%s: " _format " (%s:%d)\n", __func__, ##__VA_ARGS__, __FILE__, __LINE__)
/*
*****************************************************************************
* vendor_info_array
*
* This array contains the list of Subvendor/Subdevice IDs on which the driver
* should load.
*
*****************************************************************************
*/
typedef struct _ixl_vendor_info_t {
unsigned int vendor_id;
unsigned int device_id;
unsigned int subvendor_id;
unsigned int subdevice_id;
unsigned int index;
} ixl_vendor_info_t;
/*
** This struct has multiple uses, multicast
** addresses, vlans, and mac filters all use it.
*/
struct ixl_mac_filter {
SLIST_ENTRY(ixl_mac_filter) next;
u8 macaddr[ETHER_ADDR_LEN];
s16 vlan;
u16 flags;
};
/*
* The Transmit ring control struct
*/
struct tx_ring {
struct ixl_tx_queue *que;
u32 tail;
struct i40e_tx_desc *tx_base;
u64 tx_paddr;
u32 latency;
u32 packets;
u32 me;
/*
* For reporting completed packet status
* in descriptor writeback mode
*/
qidx_t *tx_rsq;
qidx_t tx_rs_cidx;
qidx_t tx_rs_pidx;
qidx_t tx_cidx_processed;
/* Used for Dynamic ITR calculation */
u32 itr;
u32 bytes;
/* Soft Stats */
u64 tx_bytes;
u64 tx_packets;
u64 mss_too_small;
};
/*
* The Receive ring control struct
*/
struct rx_ring {
struct ixl_rx_queue *que;
union i40e_rx_desc *rx_base;
uint64_t rx_paddr;
bool discard;
u32 itr;
u32 latency;
u32 mbuf_sz;
u32 tail;
u32 me;
/* Used for Dynamic ITR calculation */
u32 packets;
u32 bytes;
/* Soft stats */
u64 rx_packets;
u64 rx_bytes;
u64 desc_errs;
};
/*
** Driver queue structs
*/
struct ixl_tx_queue {
struct ixl_vsi *vsi;
struct tx_ring txr;
struct if_irq que_irq;
u32 msix;
/* Stats */
u64 irqs;
u64 tso;
};
struct ixl_rx_queue {
struct ixl_vsi *vsi;
struct rx_ring rxr;
struct if_irq que_irq;
u32 msix; /* This queue's MSIX vector */
/* Stats */
u64 irqs;
};
/*
** Virtual Station Interface
*/
SLIST_HEAD(ixl_ftl_head, ixl_mac_filter);
struct ixl_vsi {
if_ctx_t ctx;
if_softc_ctx_t shared;
struct ifnet *ifp;
device_t dev;
struct i40e_hw *hw;
struct ifmedia *media;
int num_rx_queues;
int num_tx_queues;
void *back;
enum i40e_vsi_type type;
int id;
u32 rx_itr_setting;
u32 tx_itr_setting;
bool enable_head_writeback;
u16 vsi_num;
bool link_active;
u16 seid;
u16 uplink_seid;
u16 downlink_seid;
struct ixl_tx_queue *tx_queues; /* TX queue array */
struct ixl_rx_queue *rx_queues; /* RX queue array */
struct if_irq irq;
u32 link_speed;
/* MAC/VLAN Filter list */
struct ixl_ftl_head ftl;
u16 num_macs;
/* Contains readylist & stat counter id */
struct i40e_aqc_vsi_properties_data info;
u16 num_vlans;
/* Per-VSI stats from hardware */
struct i40e_eth_stats eth_stats;
struct i40e_eth_stats eth_stats_offsets;
bool stat_offsets_loaded;
/* VSI stat counters */
u64 ipackets;
u64 ierrors;
u64 opackets;
u64 oerrors;
u64 ibytes;
u64 obytes;
u64 imcasts;
u64 omcasts;
u64 iqdrops;
u64 oqdrops;
u64 noproto;
/* Driver statistics */
u64 hw_filters_del;
u64 hw_filters_add;
/* Misc. */
u64 flags;
/* Stats sysctls for this VSI */
struct sysctl_oid *vsi_node;
};
/*
** Creates new filter with given MAC address and VLAN ID
*/
static inline struct ixl_mac_filter *
ixl_new_filter(struct ixl_vsi *vsi, const u8 *macaddr, s16 vlan)
{
struct ixl_mac_filter *f;
/* create a new empty filter */
f = malloc(sizeof(struct ixl_mac_filter),
M_DEVBUF, M_NOWAIT | M_ZERO);
if (f) {
SLIST_INSERT_HEAD(&vsi->ftl, f, next);
bcopy(macaddr, f->macaddr, ETHER_ADDR_LEN);
f->vlan = vlan;
f->flags |= (IXL_FILTER_ADD | IXL_FILTER_USED);
}
return (f);
}
/*
** Compare two ethernet addresses
*/
static inline bool
cmp_etheraddr(const u8 *ea1, const u8 *ea2)
{
return (bcmp(ea1, ea2, 6) == 0);
}
/*
* Return next largest power of 2, unsigned
*
* Public domain, from Bit Twiddling Hacks
*/
static inline u32
next_power_of_two(u32 n)
{
n--;
n |= n >> 1;
n |= n >> 2;
n |= n >> 4;
n |= n >> 8;
n |= n >> 16;
n++;
/* Next power of two > 0 is 1 */
n += (n == 0);
return (n);
}
/*
* Info for stats sysctls
*/
struct ixl_sysctl_info {
u64 *stat;
char *name;
char *description;
};
extern const uint8_t ixl_bcast_addr[ETHER_ADDR_LEN];
/* Common function prototypes between PF/VF driver */
void ixl_debug_core(device_t dev, u32 enabled_mask, u32 mask, char *fmt, ...);
void ixl_init_tx_ring(struct ixl_vsi *vsi, struct ixl_tx_queue *que);
void ixl_get_default_rss_key(u32 *);
const char * i40e_vc_stat_str(struct i40e_hw *hw,
enum virtchnl_status_code stat_err);
void ixl_init_tx_rsqs(struct ixl_vsi *vsi);
void ixl_init_tx_cidx(struct ixl_vsi *vsi);
u64 ixl_max_vc_speed_to_value(u8 link_speeds);
void ixl_add_vsi_sysctls(device_t dev, struct ixl_vsi *vsi,
struct sysctl_ctx_list *ctx, const char *sysctl_name);
void ixl_add_sysctls_eth_stats(struct sysctl_ctx_list *ctx,
struct sysctl_oid_list *child,
struct i40e_eth_stats *eth_stats);
void ixl_add_queues_sysctls(device_t dev, struct ixl_vsi *vsi);
#endif /* _IXL_H_ */
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