freebsd-dev/sys/dev/vnic/nic_main.c
Wojciech Macek 7056927eb8 Fix VNIC module unloading
Fix panics which were present when BGX and PF module were unloaded.

Reviewed by:	zbb
Obtained from:	Semihalf
Sponsored by:	Cavium
Differential Revision:	https://reviews.freebsd.org/D6346
2016-05-20 11:02:04 +00:00

1233 lines
31 KiB
C

/*
* Copyright (C) 2015 Cavium Inc.
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bitset.h>
#include <sys/bitstring.h>
#include <sys/bus.h>
#include <sys/endian.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/rman.h>
#include <sys/pciio.h>
#include <sys/pcpu.h>
#include <sys/proc.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/cpuset.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <net/if_media.h>
#include <machine/bus.h>
#include <machine/_inttypes.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <sys/dnv.h>
#include <sys/nv.h>
#ifdef PCI_IOV
#include <sys/iov_schema.h>
#include <dev/pci/pci_iov.h>
#endif
#include "thunder_bgx.h"
#include "nic_reg.h"
#include "nic.h"
#include "q_struct.h"
#define VNIC_PF_DEVSTR "Cavium Thunder NIC Physical Function Driver"
#define VNIC_PF_REG_RID PCIR_BAR(PCI_CFG_REG_BAR_NUM)
#define NIC_SET_VF_LMAC_MAP(bgx, lmac) ((((bgx) & 0xF) << 4) | ((lmac) & 0xF))
#define NIC_GET_BGX_FROM_VF_LMAC_MAP(map) (((map) >> 4) & 0xF)
#define NIC_GET_LMAC_FROM_VF_LMAC_MAP(map) ((map) & 0xF)
/* Structure to be used by the SR-IOV for VF configuration schemas */
struct nicvf_info {
boolean_t vf_enabled;
int vf_flags;
};
struct nicpf {
device_t dev;
uint8_t node;
u_int flags;
uint8_t num_vf_en; /* No of VF enabled */
struct nicvf_info vf_info[MAX_NUM_VFS_SUPPORTED];
struct resource * reg_base; /* Register start address */
struct pkind_cfg pkind;
uint8_t vf_lmac_map[MAX_LMAC];
boolean_t mbx_lock[MAX_NUM_VFS_SUPPORTED];
struct callout check_link;
struct mtx check_link_mtx;
uint8_t link[MAX_LMAC];
uint8_t duplex[MAX_LMAC];
uint32_t speed[MAX_LMAC];
uint16_t cpi_base[MAX_NUM_VFS_SUPPORTED];
uint16_t rssi_base[MAX_NUM_VFS_SUPPORTED];
uint16_t rss_ind_tbl_size;
/* MSI-X */
boolean_t msix_enabled;
uint8_t num_vec;
struct msix_entry msix_entries[NIC_PF_MSIX_VECTORS];
struct resource * msix_table_res;
};
static int nicpf_probe(device_t);
static int nicpf_attach(device_t);
static int nicpf_detach(device_t);
#ifdef PCI_IOV
static int nicpf_iov_init(device_t, uint16_t, const nvlist_t *);
static void nicpf_iov_uninit(device_t);
static int nicpf_iov_add_vf(device_t, uint16_t, const nvlist_t *);
#endif
static device_method_t nicpf_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, nicpf_probe),
DEVMETHOD(device_attach, nicpf_attach),
DEVMETHOD(device_detach, nicpf_detach),
/* PCI SR-IOV interface */
#ifdef PCI_IOV
DEVMETHOD(pci_iov_init, nicpf_iov_init),
DEVMETHOD(pci_iov_uninit, nicpf_iov_uninit),
DEVMETHOD(pci_iov_add_vf, nicpf_iov_add_vf),
#endif
DEVMETHOD_END,
};
static driver_t vnicpf_driver = {
"vnicpf",
nicpf_methods,
sizeof(struct nicpf),
};
static devclass_t vnicpf_devclass;
DRIVER_MODULE(vnicpf, pci, vnicpf_driver, vnicpf_devclass, 0, 0);
MODULE_VERSION(vnicpf, 1);
MODULE_DEPEND(vnicpf, pci, 1, 1, 1);
MODULE_DEPEND(vnicpf, ether, 1, 1, 1);
MODULE_DEPEND(vnicpf, thunder_bgx, 1, 1, 1);
static int nicpf_alloc_res(struct nicpf *);
static void nicpf_free_res(struct nicpf *);
static void nic_set_lmac_vf_mapping(struct nicpf *);
static void nic_init_hw(struct nicpf *);
static int nic_sriov_init(device_t, struct nicpf *);
static void nic_poll_for_link(void *);
static int nic_register_interrupts(struct nicpf *);
static void nic_unregister_interrupts(struct nicpf *);
/*
* Device interface
*/
static int
nicpf_probe(device_t dev)
{
uint16_t vendor_id;
uint16_t device_id;
vendor_id = pci_get_vendor(dev);
device_id = pci_get_device(dev);
if (vendor_id == PCI_VENDOR_ID_CAVIUM &&
device_id == PCI_DEVICE_ID_THUNDER_NIC_PF) {
device_set_desc(dev, VNIC_PF_DEVSTR);
return (BUS_PROBE_DEFAULT);
}
return (ENXIO);
}
static int
nicpf_attach(device_t dev)
{
struct nicpf *nic;
int err;
nic = device_get_softc(dev);
nic->dev = dev;
/* Enable bus mastering */
pci_enable_busmaster(dev);
/* Allocate PCI resources */
err = nicpf_alloc_res(nic);
if (err != 0) {
device_printf(dev, "Could not allocate PCI resources\n");
return (err);
}
nic->node = nic_get_node_id(nic->reg_base);
/* Enable Traffic Network Switch (TNS) bypass mode by default */
nic->flags &= ~NIC_TNS_ENABLED;
nic_set_lmac_vf_mapping(nic);
/* Initialize hardware */
nic_init_hw(nic);
/* Set RSS TBL size for each VF */
nic->rss_ind_tbl_size = NIC_MAX_RSS_IDR_TBL_SIZE;
/* Setup interrupts */
err = nic_register_interrupts(nic);
if (err != 0)
goto err_free_res;
/* Configure SRIOV */
err = nic_sriov_init(dev, nic);
if (err != 0)
goto err_free_intr;
if (nic->flags & NIC_TNS_ENABLED)
return (0);
mtx_init(&nic->check_link_mtx, "VNIC PF link poll", NULL, MTX_DEF);
/* Register physical link status poll callout */
callout_init_mtx(&nic->check_link, &nic->check_link_mtx, 0);
mtx_lock(&nic->check_link_mtx);
nic_poll_for_link(nic);
mtx_unlock(&nic->check_link_mtx);
return (0);
err_free_intr:
nic_unregister_interrupts(nic);
err_free_res:
nicpf_free_res(nic);
pci_disable_busmaster(dev);
return (err);
}
static int
nicpf_detach(device_t dev)
{
struct nicpf *nic;
int err;
err = 0;
nic = device_get_softc(dev);
callout_drain(&nic->check_link);
mtx_destroy(&nic->check_link_mtx);
nic_unregister_interrupts(nic);
nicpf_free_res(nic);
pci_disable_busmaster(dev);
#ifdef PCI_IOV
err = pci_iov_detach(dev);
if (err != 0)
device_printf(dev, "SR-IOV in use. Detach first.\n");
#endif
return (err);
}
/*
* SR-IOV interface
*/
#ifdef PCI_IOV
static int
nicpf_iov_init(device_t dev, uint16_t num_vfs, const nvlist_t *params)
{
struct nicpf *nic;
nic = device_get_softc(dev);
if (num_vfs == 0)
return (ENXIO);
nic->flags |= NIC_SRIOV_ENABLED;
return (0);
}
static void
nicpf_iov_uninit(device_t dev)
{
/* ARM64TODO: Implement this function */
}
static int
nicpf_iov_add_vf(device_t dev, uint16_t vfnum, const nvlist_t *params)
{
const void *mac;
struct nicpf *nic;
size_t size;
int bgx, lmac;
nic = device_get_softc(dev);
if ((nic->flags & NIC_SRIOV_ENABLED) == 0)
return (ENXIO);
if (vfnum > (nic->num_vf_en - 1))
return (EINVAL);
if (nvlist_exists_binary(params, "mac-addr") != 0) {
mac = nvlist_get_binary(params, "mac-addr", &size);
bgx = NIC_GET_BGX_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vfnum]);
lmac = NIC_GET_LMAC_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vfnum]);
bgx_set_lmac_mac(nic->node, bgx, lmac, mac);
}
return (0);
}
#endif
/*
* Helper routines
*/
static int
nicpf_alloc_res(struct nicpf *nic)
{
device_t dev;
int rid;
dev = nic->dev;
rid = VNIC_PF_REG_RID;
nic->reg_base = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
RF_ACTIVE);
if (nic->reg_base == NULL) {
/* For verbose output print some more details */
if (bootverbose) {
device_printf(dev,
"Could not allocate registers memory\n");
}
return (ENXIO);
}
return (0);
}
static void
nicpf_free_res(struct nicpf *nic)
{
device_t dev;
dev = nic->dev;
if (nic->reg_base != NULL) {
bus_release_resource(dev, SYS_RES_MEMORY,
rman_get_rid(nic->reg_base), nic->reg_base);
}
}
/* Register read/write APIs */
static __inline void
nic_reg_write(struct nicpf *nic, bus_space_handle_t offset,
uint64_t val)
{
bus_write_8(nic->reg_base, offset, val);
}
static __inline uint64_t
nic_reg_read(struct nicpf *nic, uint64_t offset)
{
uint64_t val;
val = bus_read_8(nic->reg_base, offset);
return (val);
}
/* PF -> VF mailbox communication APIs */
static void
nic_enable_mbx_intr(struct nicpf *nic)
{
/* Enable mailbox interrupt for all 128 VFs */
nic_reg_write(nic, NIC_PF_MAILBOX_ENA_W1S, ~0UL);
nic_reg_write(nic, NIC_PF_MAILBOX_ENA_W1S + sizeof(uint64_t), ~0UL);
}
static void
nic_clear_mbx_intr(struct nicpf *nic, int vf, int mbx_reg)
{
nic_reg_write(nic, NIC_PF_MAILBOX_INT + (mbx_reg << 3), (1UL << vf));
}
static uint64_t
nic_get_mbx_addr(int vf)
{
return (NIC_PF_VF_0_127_MAILBOX_0_1 + (vf << NIC_VF_NUM_SHIFT));
}
/*
* Send a mailbox message to VF
* @vf: vf to which this message to be sent
* @mbx: Message to be sent
*/
static void
nic_send_msg_to_vf(struct nicpf *nic, int vf, union nic_mbx *mbx)
{
bus_space_handle_t mbx_addr = nic_get_mbx_addr(vf);
uint64_t *msg = (uint64_t *)mbx;
/*
* In first revision HW, mbox interrupt is triggerred
* when PF writes to MBOX(1), in next revisions when
* PF writes to MBOX(0)
*/
if (pass1_silicon(nic->dev)) {
nic_reg_write(nic, mbx_addr + 0, msg[0]);
nic_reg_write(nic, mbx_addr + 8, msg[1]);
} else {
nic_reg_write(nic, mbx_addr + 8, msg[1]);
nic_reg_write(nic, mbx_addr + 0, msg[0]);
}
}
/*
* Responds to VF's READY message with VF's
* ID, node, MAC address e.t.c
* @vf: VF which sent READY message
*/
static void
nic_mbx_send_ready(struct nicpf *nic, int vf)
{
union nic_mbx mbx = {};
int bgx_idx, lmac;
const char *mac;
mbx.nic_cfg.msg = NIC_MBOX_MSG_READY;
mbx.nic_cfg.vf_id = vf;
if (nic->flags & NIC_TNS_ENABLED)
mbx.nic_cfg.tns_mode = NIC_TNS_MODE;
else
mbx.nic_cfg.tns_mode = NIC_TNS_BYPASS_MODE;
if (vf < MAX_LMAC) {
bgx_idx = NIC_GET_BGX_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vf]);
lmac = NIC_GET_LMAC_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vf]);
mac = bgx_get_lmac_mac(nic->node, bgx_idx, lmac);
if (mac) {
memcpy((uint8_t *)&mbx.nic_cfg.mac_addr, mac,
ETHER_ADDR_LEN);
}
}
mbx.nic_cfg.node_id = nic->node;
mbx.nic_cfg.loopback_supported = vf < MAX_LMAC;
nic_send_msg_to_vf(nic, vf, &mbx);
}
/*
* ACKs VF's mailbox message
* @vf: VF to which ACK to be sent
*/
static void
nic_mbx_send_ack(struct nicpf *nic, int vf)
{
union nic_mbx mbx = {};
mbx.msg.msg = NIC_MBOX_MSG_ACK;
nic_send_msg_to_vf(nic, vf, &mbx);
}
/*
* NACKs VF's mailbox message that PF is not able to
* complete the action
* @vf: VF to which ACK to be sent
*/
static void
nic_mbx_send_nack(struct nicpf *nic, int vf)
{
union nic_mbx mbx = {};
mbx.msg.msg = NIC_MBOX_MSG_NACK;
nic_send_msg_to_vf(nic, vf, &mbx);
}
/*
* Flush all in flight receive packets to memory and
* bring down an active RQ
*/
static int
nic_rcv_queue_sw_sync(struct nicpf *nic)
{
uint16_t timeout = ~0x00;
nic_reg_write(nic, NIC_PF_SW_SYNC_RX, 0x01);
/* Wait till sync cycle is finished */
while (timeout) {
if (nic_reg_read(nic, NIC_PF_SW_SYNC_RX_DONE) & 0x1)
break;
timeout--;
}
nic_reg_write(nic, NIC_PF_SW_SYNC_RX, 0x00);
if (!timeout) {
device_printf(nic->dev, "Receive queue software sync failed\n");
return (ETIMEDOUT);
}
return (0);
}
/* Get BGX Rx/Tx stats and respond to VF's request */
static void
nic_get_bgx_stats(struct nicpf *nic, struct bgx_stats_msg *bgx)
{
int bgx_idx, lmac;
union nic_mbx mbx = {};
bgx_idx = NIC_GET_BGX_FROM_VF_LMAC_MAP(nic->vf_lmac_map[bgx->vf_id]);
lmac = NIC_GET_LMAC_FROM_VF_LMAC_MAP(nic->vf_lmac_map[bgx->vf_id]);
mbx.bgx_stats.msg = NIC_MBOX_MSG_BGX_STATS;
mbx.bgx_stats.vf_id = bgx->vf_id;
mbx.bgx_stats.rx = bgx->rx;
mbx.bgx_stats.idx = bgx->idx;
if (bgx->rx != 0) {
mbx.bgx_stats.stats =
bgx_get_rx_stats(nic->node, bgx_idx, lmac, bgx->idx);
} else {
mbx.bgx_stats.stats =
bgx_get_tx_stats(nic->node, bgx_idx, lmac, bgx->idx);
}
nic_send_msg_to_vf(nic, bgx->vf_id, &mbx);
}
/* Update hardware min/max frame size */
static int
nic_update_hw_frs(struct nicpf *nic, int new_frs, int vf)
{
if ((new_frs > NIC_HW_MAX_FRS) || (new_frs < NIC_HW_MIN_FRS)) {
device_printf(nic->dev,
"Invalid MTU setting from VF%d rejected, "
"should be between %d and %d\n",
vf, NIC_HW_MIN_FRS, NIC_HW_MAX_FRS);
return (EINVAL);
}
new_frs += ETHER_HDR_LEN;
if (new_frs <= nic->pkind.maxlen)
return (0);
nic->pkind.maxlen = new_frs;
nic_reg_write(nic, NIC_PF_PKIND_0_15_CFG, *(uint64_t *)&nic->pkind);
return (0);
}
/* Set minimum transmit packet size */
static void
nic_set_tx_pkt_pad(struct nicpf *nic, int size)
{
int lmac;
uint64_t lmac_cfg;
/* Max value that can be set is 60 */
if (size > 60)
size = 60;
for (lmac = 0; lmac < (MAX_BGX_PER_CN88XX * MAX_LMAC_PER_BGX); lmac++) {
lmac_cfg = nic_reg_read(nic, NIC_PF_LMAC_0_7_CFG | (lmac << 3));
lmac_cfg &= ~(0xF << 2);
lmac_cfg |= ((size / 4) << 2);
nic_reg_write(nic, NIC_PF_LMAC_0_7_CFG | (lmac << 3), lmac_cfg);
}
}
/*
* Function to check number of LMACs present and set VF::LMAC mapping.
* Mapping will be used while initializing channels.
*/
static void
nic_set_lmac_vf_mapping(struct nicpf *nic)
{
unsigned bgx_map = bgx_get_map(nic->node);
int bgx, next_bgx_lmac = 0;
int lmac, lmac_cnt = 0;
uint64_t lmac_credit;
nic->num_vf_en = 0;
if (nic->flags & NIC_TNS_ENABLED) {
nic->num_vf_en = DEFAULT_NUM_VF_ENABLED;
return;
}
for (bgx = 0; bgx < NIC_MAX_BGX; bgx++) {
if ((bgx_map & (1 << bgx)) == 0)
continue;
lmac_cnt = bgx_get_lmac_count(nic->node, bgx);
for (lmac = 0; lmac < lmac_cnt; lmac++)
nic->vf_lmac_map[next_bgx_lmac++] =
NIC_SET_VF_LMAC_MAP(bgx, lmac);
nic->num_vf_en += lmac_cnt;
/* Program LMAC credits */
lmac_credit = (1UL << 1); /* channel credit enable */
lmac_credit |= (0x1ff << 2); /* Max outstanding pkt count */
/* 48KB BGX Tx buffer size, each unit is of size 16bytes */
lmac_credit |= (((((48 * 1024) / lmac_cnt) -
NIC_HW_MAX_FRS) / 16) << 12);
lmac = bgx * MAX_LMAC_PER_BGX;
for (; lmac < lmac_cnt + (bgx * MAX_LMAC_PER_BGX); lmac++) {
nic_reg_write(nic, NIC_PF_LMAC_0_7_CREDIT + (lmac * 8),
lmac_credit);
}
}
}
#define TNS_PORT0_BLOCK 6
#define TNS_PORT1_BLOCK 7
#define BGX0_BLOCK 8
#define BGX1_BLOCK 9
static void
nic_init_hw(struct nicpf *nic)
{
int i;
/* Enable NIC HW block */
nic_reg_write(nic, NIC_PF_CFG, 0x3);
/* Enable backpressure */
nic_reg_write(nic, NIC_PF_BP_CFG, (1UL << 6) | 0x03);
if (nic->flags & NIC_TNS_ENABLED) {
nic_reg_write(nic, NIC_PF_INTF_0_1_SEND_CFG,
(NIC_TNS_MODE << 7) | TNS_PORT0_BLOCK);
nic_reg_write(nic, NIC_PF_INTF_0_1_SEND_CFG | (1 << 8),
(NIC_TNS_MODE << 7) | TNS_PORT1_BLOCK);
nic_reg_write(nic, NIC_PF_INTF_0_1_BP_CFG,
(1UL << 63) | TNS_PORT0_BLOCK);
nic_reg_write(nic, NIC_PF_INTF_0_1_BP_CFG + (1 << 8),
(1UL << 63) | TNS_PORT1_BLOCK);
} else {
/* Disable TNS mode on both interfaces */
nic_reg_write(nic, NIC_PF_INTF_0_1_SEND_CFG,
(NIC_TNS_BYPASS_MODE << 7) | BGX0_BLOCK);
nic_reg_write(nic, NIC_PF_INTF_0_1_SEND_CFG | (1 << 8),
(NIC_TNS_BYPASS_MODE << 7) | BGX1_BLOCK);
nic_reg_write(nic, NIC_PF_INTF_0_1_BP_CFG,
(1UL << 63) | BGX0_BLOCK);
nic_reg_write(nic, NIC_PF_INTF_0_1_BP_CFG + (1 << 8),
(1UL << 63) | BGX1_BLOCK);
}
/* PKIND configuration */
nic->pkind.minlen = 0;
nic->pkind.maxlen = NIC_HW_MAX_FRS + ETHER_HDR_LEN;
nic->pkind.lenerr_en = 1;
nic->pkind.rx_hdr = 0;
nic->pkind.hdr_sl = 0;
for (i = 0; i < NIC_MAX_PKIND; i++) {
nic_reg_write(nic, NIC_PF_PKIND_0_15_CFG | (i << 3),
*(uint64_t *)&nic->pkind);
}
nic_set_tx_pkt_pad(nic, NIC_HW_MIN_FRS);
/* Timer config */
nic_reg_write(nic, NIC_PF_INTR_TIMER_CFG, NICPF_CLK_PER_INT_TICK);
/* Enable VLAN ethertype matching and stripping */
nic_reg_write(nic, NIC_PF_RX_ETYPE_0_7,
(2 << 19) | (ETYPE_ALG_VLAN_STRIP << 16) | ETHERTYPE_VLAN);
}
/* Channel parse index configuration */
static void
nic_config_cpi(struct nicpf *nic, struct cpi_cfg_msg *cfg)
{
uint32_t vnic, bgx, lmac, chan;
uint32_t padd, cpi_count = 0;
uint64_t cpi_base, cpi, rssi_base, rssi;
uint8_t qset, rq_idx = 0;
vnic = cfg->vf_id;
bgx = NIC_GET_BGX_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vnic]);
lmac = NIC_GET_LMAC_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vnic]);
chan = (lmac * MAX_BGX_CHANS_PER_LMAC) + (bgx * NIC_CHANS_PER_INF);
cpi_base = (lmac * NIC_MAX_CPI_PER_LMAC) + (bgx * NIC_CPI_PER_BGX);
rssi_base = (lmac * nic->rss_ind_tbl_size) + (bgx * NIC_RSSI_PER_BGX);
/* Rx channel configuration */
nic_reg_write(nic, NIC_PF_CHAN_0_255_RX_BP_CFG | (chan << 3),
(1UL << 63) | (vnic << 0));
nic_reg_write(nic, NIC_PF_CHAN_0_255_RX_CFG | (chan << 3),
((uint64_t)cfg->cpi_alg << 62) | (cpi_base << 48));
if (cfg->cpi_alg == CPI_ALG_NONE)
cpi_count = 1;
else if (cfg->cpi_alg == CPI_ALG_VLAN) /* 3 bits of PCP */
cpi_count = 8;
else if (cfg->cpi_alg == CPI_ALG_VLAN16) /* 3 bits PCP + DEI */
cpi_count = 16;
else if (cfg->cpi_alg == CPI_ALG_DIFF) /* 6bits DSCP */
cpi_count = NIC_MAX_CPI_PER_LMAC;
/* RSS Qset, Qidx mapping */
qset = cfg->vf_id;
rssi = rssi_base;
for (; rssi < (rssi_base + cfg->rq_cnt); rssi++) {
nic_reg_write(nic, NIC_PF_RSSI_0_4097_RQ | (rssi << 3),
(qset << 3) | rq_idx);
rq_idx++;
}
rssi = 0;
cpi = cpi_base;
for (; cpi < (cpi_base + cpi_count); cpi++) {
/* Determine port to channel adder */
if (cfg->cpi_alg != CPI_ALG_DIFF)
padd = cpi % cpi_count;
else
padd = cpi % 8; /* 3 bits CS out of 6bits DSCP */
/* Leave RSS_SIZE as '0' to disable RSS */
if (pass1_silicon(nic->dev)) {
nic_reg_write(nic, NIC_PF_CPI_0_2047_CFG | (cpi << 3),
(vnic << 24) | (padd << 16) | (rssi_base + rssi));
} else {
/* Set MPI_ALG to '0' to disable MCAM parsing */
nic_reg_write(nic, NIC_PF_CPI_0_2047_CFG | (cpi << 3),
(padd << 16));
/* MPI index is same as CPI if MPI_ALG is not enabled */
nic_reg_write(nic, NIC_PF_MPI_0_2047_CFG | (cpi << 3),
(vnic << 24) | (rssi_base + rssi));
}
if ((rssi + 1) >= cfg->rq_cnt)
continue;
if (cfg->cpi_alg == CPI_ALG_VLAN)
rssi++;
else if (cfg->cpi_alg == CPI_ALG_VLAN16)
rssi = ((cpi - cpi_base) & 0xe) >> 1;
else if (cfg->cpi_alg == CPI_ALG_DIFF)
rssi = ((cpi - cpi_base) & 0x38) >> 3;
}
nic->cpi_base[cfg->vf_id] = cpi_base;
nic->rssi_base[cfg->vf_id] = rssi_base;
}
/* Responsds to VF with its RSS indirection table size */
static void
nic_send_rss_size(struct nicpf *nic, int vf)
{
union nic_mbx mbx = {};
uint64_t *msg;
msg = (uint64_t *)&mbx;
mbx.rss_size.msg = NIC_MBOX_MSG_RSS_SIZE;
mbx.rss_size.ind_tbl_size = nic->rss_ind_tbl_size;
nic_send_msg_to_vf(nic, vf, &mbx);
}
/*
* Receive side scaling configuration
* configure:
* - RSS index
* - indir table i.e hash::RQ mapping
* - no of hash bits to consider
*/
static void
nic_config_rss(struct nicpf *nic, struct rss_cfg_msg *cfg)
{
uint8_t qset, idx;
uint64_t cpi_cfg, cpi_base, rssi_base, rssi;
uint64_t idx_addr;
idx = 0;
rssi_base = nic->rssi_base[cfg->vf_id] + cfg->tbl_offset;
rssi = rssi_base;
qset = cfg->vf_id;
for (; rssi < (rssi_base + cfg->tbl_len); rssi++) {
nic_reg_write(nic, NIC_PF_RSSI_0_4097_RQ | (rssi << 3),
(qset << 3) | (cfg->ind_tbl[idx] & 0x7));
idx++;
}
cpi_base = nic->cpi_base[cfg->vf_id];
if (pass1_silicon(nic->dev))
idx_addr = NIC_PF_CPI_0_2047_CFG;
else
idx_addr = NIC_PF_MPI_0_2047_CFG;
cpi_cfg = nic_reg_read(nic, idx_addr | (cpi_base << 3));
cpi_cfg &= ~(0xFUL << 20);
cpi_cfg |= (cfg->hash_bits << 20);
nic_reg_write(nic, idx_addr | (cpi_base << 3), cpi_cfg);
}
/*
* 4 level transmit side scheduler configutation
* for TNS bypass mode
*
* Sample configuration for SQ0
* VNIC0-SQ0 -> TL4(0) -> TL3[0] -> TL2[0] -> TL1[0] -> BGX0
* VNIC1-SQ0 -> TL4(8) -> TL3[2] -> TL2[0] -> TL1[0] -> BGX0
* VNIC2-SQ0 -> TL4(16) -> TL3[4] -> TL2[1] -> TL1[0] -> BGX0
* VNIC3-SQ0 -> TL4(24) -> TL3[6] -> TL2[1] -> TL1[0] -> BGX0
* VNIC4-SQ0 -> TL4(512) -> TL3[128] -> TL2[32] -> TL1[1] -> BGX1
* VNIC5-SQ0 -> TL4(520) -> TL3[130] -> TL2[32] -> TL1[1] -> BGX1
* VNIC6-SQ0 -> TL4(528) -> TL3[132] -> TL2[33] -> TL1[1] -> BGX1
* VNIC7-SQ0 -> TL4(536) -> TL3[134] -> TL2[33] -> TL1[1] -> BGX1
*/
static void
nic_tx_channel_cfg(struct nicpf *nic, uint8_t vnic, struct sq_cfg_msg *sq)
{
uint32_t bgx, lmac, chan;
uint32_t tl2, tl3, tl4;
uint32_t rr_quantum;
uint8_t sq_idx = sq->sq_num;
uint8_t pqs_vnic;
pqs_vnic = vnic;
bgx = NIC_GET_BGX_FROM_VF_LMAC_MAP(nic->vf_lmac_map[pqs_vnic]);
lmac = NIC_GET_LMAC_FROM_VF_LMAC_MAP(nic->vf_lmac_map[pqs_vnic]);
/* 24 bytes for FCS, IPG and preamble */
rr_quantum = ((NIC_HW_MAX_FRS + 24) / 4);
tl4 = (lmac * NIC_TL4_PER_LMAC) + (bgx * NIC_TL4_PER_BGX);
tl4 += sq_idx;
tl3 = tl4 / (NIC_MAX_TL4 / NIC_MAX_TL3);
nic_reg_write(nic, NIC_PF_QSET_0_127_SQ_0_7_CFG2 |
((uint64_t)vnic << NIC_QS_ID_SHIFT) |
((uint32_t)sq_idx << NIC_Q_NUM_SHIFT), tl4);
nic_reg_write(nic, NIC_PF_TL4_0_1023_CFG | (tl4 << 3),
((uint64_t)vnic << 27) | ((uint32_t)sq_idx << 24) | rr_quantum);
nic_reg_write(nic, NIC_PF_TL3_0_255_CFG | (tl3 << 3), rr_quantum);
chan = (lmac * MAX_BGX_CHANS_PER_LMAC) + (bgx * NIC_CHANS_PER_INF);
nic_reg_write(nic, NIC_PF_TL3_0_255_CHAN | (tl3 << 3), chan);
/* Enable backpressure on the channel */
nic_reg_write(nic, NIC_PF_CHAN_0_255_TX_CFG | (chan << 3), 1);
tl2 = tl3 >> 2;
nic_reg_write(nic, NIC_PF_TL3A_0_63_CFG | (tl2 << 3), tl2);
nic_reg_write(nic, NIC_PF_TL2_0_63_CFG | (tl2 << 3), rr_quantum);
/* No priorities as of now */
nic_reg_write(nic, NIC_PF_TL2_0_63_PRI | (tl2 << 3), 0x00);
}
static int
nic_config_loopback(struct nicpf *nic, struct set_loopback *lbk)
{
int bgx_idx, lmac_idx;
if (lbk->vf_id > MAX_LMAC)
return (ENXIO);
bgx_idx = NIC_GET_BGX_FROM_VF_LMAC_MAP(nic->vf_lmac_map[lbk->vf_id]);
lmac_idx = NIC_GET_LMAC_FROM_VF_LMAC_MAP(nic->vf_lmac_map[lbk->vf_id]);
bgx_lmac_internal_loopback(nic->node, bgx_idx, lmac_idx, lbk->enable);
return (0);
}
/* Interrupt handler to handle mailbox messages from VFs */
static void
nic_handle_mbx_intr(struct nicpf *nic, int vf)
{
union nic_mbx mbx = {};
uint64_t *mbx_data;
uint64_t mbx_addr;
uint64_t reg_addr;
uint64_t cfg;
int bgx, lmac;
int i;
int ret = 0;
nic->mbx_lock[vf] = TRUE;
mbx_addr = nic_get_mbx_addr(vf);
mbx_data = (uint64_t *)&mbx;
for (i = 0; i < NIC_PF_VF_MAILBOX_SIZE; i++) {
*mbx_data = nic_reg_read(nic, mbx_addr);
mbx_data++;
mbx_addr += sizeof(uint64_t);
}
switch (mbx.msg.msg) {
case NIC_MBOX_MSG_READY:
nic_mbx_send_ready(nic, vf);
if (vf < MAX_LMAC) {
nic->link[vf] = 0;
nic->duplex[vf] = 0;
nic->speed[vf] = 0;
}
ret = 1;
break;
case NIC_MBOX_MSG_QS_CFG:
reg_addr = NIC_PF_QSET_0_127_CFG |
(mbx.qs.num << NIC_QS_ID_SHIFT);
cfg = mbx.qs.cfg;
nic_reg_write(nic, reg_addr, cfg);
break;
case NIC_MBOX_MSG_RQ_CFG:
reg_addr = NIC_PF_QSET_0_127_RQ_0_7_CFG |
(mbx.rq.qs_num << NIC_QS_ID_SHIFT) |
(mbx.rq.rq_num << NIC_Q_NUM_SHIFT);
nic_reg_write(nic, reg_addr, mbx.rq.cfg);
break;
case NIC_MBOX_MSG_RQ_BP_CFG:
reg_addr = NIC_PF_QSET_0_127_RQ_0_7_BP_CFG |
(mbx.rq.qs_num << NIC_QS_ID_SHIFT) |
(mbx.rq.rq_num << NIC_Q_NUM_SHIFT);
nic_reg_write(nic, reg_addr, mbx.rq.cfg);
break;
case NIC_MBOX_MSG_RQ_SW_SYNC:
ret = nic_rcv_queue_sw_sync(nic);
break;
case NIC_MBOX_MSG_RQ_DROP_CFG:
reg_addr = NIC_PF_QSET_0_127_RQ_0_7_DROP_CFG |
(mbx.rq.qs_num << NIC_QS_ID_SHIFT) |
(mbx.rq.rq_num << NIC_Q_NUM_SHIFT);
nic_reg_write(nic, reg_addr, mbx.rq.cfg);
break;
case NIC_MBOX_MSG_SQ_CFG:
reg_addr = NIC_PF_QSET_0_127_SQ_0_7_CFG |
(mbx.sq.qs_num << NIC_QS_ID_SHIFT) |
(mbx.sq.sq_num << NIC_Q_NUM_SHIFT);
nic_reg_write(nic, reg_addr, mbx.sq.cfg);
nic_tx_channel_cfg(nic, mbx.qs.num, &mbx.sq);
break;
case NIC_MBOX_MSG_SET_MAC:
lmac = mbx.mac.vf_id;
bgx = NIC_GET_BGX_FROM_VF_LMAC_MAP(nic->vf_lmac_map[lmac]);
lmac = NIC_GET_LMAC_FROM_VF_LMAC_MAP(nic->vf_lmac_map[lmac]);
bgx_set_lmac_mac(nic->node, bgx, lmac, mbx.mac.mac_addr);
break;
case NIC_MBOX_MSG_SET_MAX_FRS:
ret = nic_update_hw_frs(nic, mbx.frs.max_frs, mbx.frs.vf_id);
break;
case NIC_MBOX_MSG_CPI_CFG:
nic_config_cpi(nic, &mbx.cpi_cfg);
break;
case NIC_MBOX_MSG_RSS_SIZE:
nic_send_rss_size(nic, vf);
goto unlock;
case NIC_MBOX_MSG_RSS_CFG:
case NIC_MBOX_MSG_RSS_CFG_CONT: /* fall through */
nic_config_rss(nic, &mbx.rss_cfg);
break;
case NIC_MBOX_MSG_CFG_DONE:
/* Last message of VF config msg sequence */
nic->vf_info[vf].vf_enabled = TRUE;
goto unlock;
case NIC_MBOX_MSG_SHUTDOWN:
/* First msg in VF teardown sequence */
nic->vf_info[vf].vf_enabled = FALSE;
break;
case NIC_MBOX_MSG_BGX_STATS:
nic_get_bgx_stats(nic, &mbx.bgx_stats);
goto unlock;
case NIC_MBOX_MSG_LOOPBACK:
ret = nic_config_loopback(nic, &mbx.lbk);
break;
default:
device_printf(nic->dev,
"Invalid msg from VF%d, msg 0x%x\n", vf, mbx.msg.msg);
break;
}
if (ret == 0)
nic_mbx_send_ack(nic, vf);
else if (mbx.msg.msg != NIC_MBOX_MSG_READY)
nic_mbx_send_nack(nic, vf);
unlock:
nic->mbx_lock[vf] = FALSE;
}
static void
nic_mbx_intr_handler(struct nicpf *nic, int mbx)
{
uint64_t intr;
uint8_t vf, vf_per_mbx_reg = 64;
intr = nic_reg_read(nic, NIC_PF_MAILBOX_INT + (mbx << 3));
for (vf = 0; vf < vf_per_mbx_reg; vf++) {
if (intr & (1UL << vf)) {
nic_handle_mbx_intr(nic, vf + (mbx * vf_per_mbx_reg));
nic_clear_mbx_intr(nic, vf, mbx);
}
}
}
static void
nic_mbx0_intr_handler (void *arg)
{
struct nicpf *nic = (struct nicpf *)arg;
nic_mbx_intr_handler(nic, 0);
}
static void
nic_mbx1_intr_handler (void *arg)
{
struct nicpf *nic = (struct nicpf *)arg;
nic_mbx_intr_handler(nic, 1);
}
static int
nic_enable_msix(struct nicpf *nic)
{
struct pci_devinfo *dinfo;
int rid, count;
int ret;
dinfo = device_get_ivars(nic->dev);
rid = dinfo->cfg.msix.msix_table_bar;
nic->msix_table_res =
bus_alloc_resource_any(nic->dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
if (nic->msix_table_res == NULL) {
device_printf(nic->dev,
"Could not allocate memory for MSI-X table\n");
return (ENXIO);
}
count = nic->num_vec = NIC_PF_MSIX_VECTORS;
ret = pci_alloc_msix(nic->dev, &count);
if ((ret != 0) || (count != nic->num_vec)) {
device_printf(nic->dev,
"Request for #%d msix vectors failed, error: %d\n",
nic->num_vec, ret);
return (ret);
}
nic->msix_enabled = 1;
return (0);
}
static void
nic_disable_msix(struct nicpf *nic)
{
if (nic->msix_enabled) {
pci_release_msi(nic->dev);
nic->msix_enabled = 0;
nic->num_vec = 0;
}
bus_release_resource(nic->dev, SYS_RES_MEMORY,
rman_get_rid(nic->msix_table_res), nic->msix_table_res);
}
static void
nic_free_all_interrupts(struct nicpf *nic)
{
int irq;
for (irq = 0; irq < nic->num_vec; irq++) {
if (nic->msix_entries[irq].irq_res == NULL)
continue;
if (nic->msix_entries[irq].handle != NULL) {
bus_teardown_intr(nic->dev,
nic->msix_entries[irq].irq_res,
nic->msix_entries[irq].handle);
}
bus_release_resource(nic->dev, SYS_RES_IRQ, irq + 1,
nic->msix_entries[irq].irq_res);
}
}
static int
nic_register_interrupts(struct nicpf *nic)
{
int irq, rid;
int ret;
/* Enable MSI-X */
ret = nic_enable_msix(nic);
if (ret != 0)
return (ret);
/* Register mailbox interrupt handlers */
irq = NIC_PF_INTR_ID_MBOX0;
rid = irq + 1;
nic->msix_entries[irq].irq_res = bus_alloc_resource_any(nic->dev,
SYS_RES_IRQ, &rid, (RF_SHAREABLE | RF_ACTIVE));
if (nic->msix_entries[irq].irq_res == NULL) {
ret = ENXIO;
goto fail;
}
ret = bus_setup_intr(nic->dev, nic->msix_entries[irq].irq_res,
(INTR_MPSAFE | INTR_TYPE_MISC), NULL, nic_mbx0_intr_handler, nic,
&nic->msix_entries[irq].handle);
if (ret != 0)
goto fail;
irq = NIC_PF_INTR_ID_MBOX1;
rid = irq + 1;
nic->msix_entries[irq].irq_res = bus_alloc_resource_any(nic->dev,
SYS_RES_IRQ, &rid, (RF_SHAREABLE | RF_ACTIVE));
if (nic->msix_entries[irq].irq_res == NULL) {
ret = ENXIO;
goto fail;
}
ret = bus_setup_intr(nic->dev, nic->msix_entries[irq].irq_res,
(INTR_MPSAFE | INTR_TYPE_MISC), NULL, nic_mbx1_intr_handler, nic,
&nic->msix_entries[irq].handle);
if (ret != 0)
goto fail;
/* Enable mailbox interrupt */
nic_enable_mbx_intr(nic);
return (0);
fail:
nic_free_all_interrupts(nic);
return (ret);
}
static void
nic_unregister_interrupts(struct nicpf *nic)
{
nic_free_all_interrupts(nic);
nic_disable_msix(nic);
}
static int nic_sriov_init(device_t dev, struct nicpf *nic)
{
#ifdef PCI_IOV
nvlist_t *pf_schema, *vf_schema;
int iov_pos;
int err;
uint16_t total_vf_cnt;
err = pci_find_extcap(dev, PCIZ_SRIOV, &iov_pos);
if (err != 0) {
device_printf(dev,
"SR-IOV capability is not found in PCIe config space\n");
return (err);
}
/* Fix-up the number of enabled VFs */
total_vf_cnt = pci_read_config(dev, iov_pos + PCIR_SRIOV_TOTAL_VFS, 2);
if (total_vf_cnt == 0)
return (ENXIO);
/* Attach SR-IOV */
pf_schema = pci_iov_schema_alloc_node();
vf_schema = pci_iov_schema_alloc_node();
pci_iov_schema_add_unicast_mac(vf_schema, "mac-addr", 0, NULL);
/*
* All VFs can change their MACs.
* This flag will be ignored but we set it just for the record.
*/
pci_iov_schema_add_bool(vf_schema, "allow-set-mac",
IOV_SCHEMA_HASDEFAULT, TRUE);
err = pci_iov_attach(dev, pf_schema, vf_schema);
if (err != 0) {
device_printf(dev,
"Failed to initialize SR-IOV (error=%d)\n",
err);
return (err);
}
#endif
return (0);
}
/*
* Poll for BGX LMAC link status and update corresponding VF
* if there is a change, valid only if internal L2 switch
* is not present otherwise VF link is always treated as up
*/
static void
nic_poll_for_link(void *arg)
{
union nic_mbx mbx = {};
struct nicpf *nic;
struct bgx_link_status link;
uint8_t vf, bgx, lmac;
nic = (struct nicpf *)arg;
mbx.link_status.msg = NIC_MBOX_MSG_BGX_LINK_CHANGE;
for (vf = 0; vf < nic->num_vf_en; vf++) {
/* Poll only if VF is UP */
if (!nic->vf_info[vf].vf_enabled)
continue;
/* Get BGX, LMAC indices for the VF */
bgx = NIC_GET_BGX_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vf]);
lmac = NIC_GET_LMAC_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vf]);
/* Get interface link status */
bgx_get_lmac_link_state(nic->node, bgx, lmac, &link);
/* Inform VF only if link status changed */
if (nic->link[vf] == link.link_up)
continue;
if (!nic->mbx_lock[vf]) {
nic->link[vf] = link.link_up;
nic->duplex[vf] = link.duplex;
nic->speed[vf] = link.speed;
/* Send a mbox message to VF with current link status */
mbx.link_status.link_up = link.link_up;
mbx.link_status.duplex = link.duplex;
mbx.link_status.speed = link.speed;
nic_send_msg_to_vf(nic, vf, &mbx);
}
}
callout_reset(&nic->check_link, hz * 2, nic_poll_for_link, nic);
}