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freebsd-nq/sys/dev/vnic/nicvf_queues.c
Zbigniew Bodek f6cdb4ceb3 Fix deadlock in VNIC when using single CPU only 
Number of free Tx descriptors does not need to be locked since
it can be modified atomically between SND and CQ tasks.
It will also block Tx routine from sending packets while CQ will not
be able to free descriptors.

Obtained from:	Semihalf
Sponsored by:	Cavium
Differential Revision: https://reviews.freebsd.org/D6266
2016-05-11 13:38:29 +00:00

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/*
* 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 "opt_inet.h"
#include "opt_inet6.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bitset.h>
#include <sys/bitstring.h>
#include <sys/buf_ring.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/sockio.h>
#include <sys/socket.h>
#include <sys/stdatomic.h>
#include <sys/cpuset.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/smp.h>
#include <sys/taskqueue.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <machine/bus.h>
#include <machine/vmparam.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_media.h>
#include <net/ifq.h>
#include <net/bpf.h>
#include <net/ethernet.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/sctp.h>
#include <netinet/tcp.h>
#include <netinet/tcp_lro.h>
#include <netinet/udp.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include "thunder_bgx.h"
#include "nic_reg.h"
#include "nic.h"
#include "q_struct.h"
#include "nicvf_queues.h"
#define DEBUG
#undef DEBUG
#ifdef DEBUG
#define dprintf(dev, fmt, ...) device_printf(dev, fmt, ##__VA_ARGS__)
#else
#define dprintf(dev, fmt, ...)
#endif
MALLOC_DECLARE(M_NICVF);
static void nicvf_free_snd_queue(struct nicvf *, struct snd_queue *);
static struct mbuf * nicvf_get_rcv_mbuf(struct nicvf *, struct cqe_rx_t *);
static void nicvf_sq_disable(struct nicvf *, int);
static void nicvf_sq_enable(struct nicvf *, struct snd_queue *, int);
static void nicvf_put_sq_desc(struct snd_queue *, int);
static void nicvf_cmp_queue_config(struct nicvf *, struct queue_set *, int,
boolean_t);
static void nicvf_sq_free_used_descs(struct nicvf *, struct snd_queue *, int);
static int nicvf_tx_mbuf_locked(struct snd_queue *, struct mbuf **);
static void nicvf_rbdr_task(void *, int);
static void nicvf_rbdr_task_nowait(void *, int);
struct rbuf_info {
bus_dma_tag_t dmat;
bus_dmamap_t dmap;
struct mbuf * mbuf;
};
#define GET_RBUF_INFO(x) ((struct rbuf_info *)((x) - NICVF_RCV_BUF_ALIGN_BYTES))
/* Poll a register for a specific value */
static int nicvf_poll_reg(struct nicvf *nic, int qidx,
uint64_t reg, int bit_pos, int bits, int val)
{
uint64_t bit_mask;
uint64_t reg_val;
int timeout = 10;
bit_mask = (1UL << bits) - 1;
bit_mask = (bit_mask << bit_pos);
while (timeout) {
reg_val = nicvf_queue_reg_read(nic, reg, qidx);
if (((reg_val & bit_mask) >> bit_pos) == val)
return (0);
DELAY(1000);
timeout--;
}
device_printf(nic->dev, "Poll on reg 0x%lx failed\n", reg);
return (ETIMEDOUT);
}
/* Callback for bus_dmamap_load() */
static void
nicvf_dmamap_q_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
{
bus_addr_t *paddr;
KASSERT(nseg == 1, ("wrong number of segments, should be 1"));
paddr = arg;
*paddr = segs->ds_addr;
}
/* Allocate memory for a queue's descriptors */
static int
nicvf_alloc_q_desc_mem(struct nicvf *nic, struct q_desc_mem *dmem,
int q_len, int desc_size, int align_bytes)
{
int err, err_dmat;
/* Create DMA tag first */
err = bus_dma_tag_create(
bus_get_dma_tag(nic->dev), /* parent tag */
align_bytes, /* alignment */
0, /* boundary */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filtfunc, filtfuncarg */
(q_len * desc_size), /* maxsize */
1, /* nsegments */
(q_len * desc_size), /* maxsegsize */
0, /* flags */
NULL, NULL, /* lockfunc, lockfuncarg */
&dmem->dmat); /* dmat */
if (err != 0) {
device_printf(nic->dev,
"Failed to create busdma tag for descriptors ring\n");
return (err);
}
/* Allocate segment of continuous DMA safe memory */
err = bus_dmamem_alloc(
dmem->dmat, /* DMA tag */
&dmem->base, /* virtual address */
(BUS_DMA_NOWAIT | BUS_DMA_ZERO), /* flags */
&dmem->dmap); /* DMA map */
if (err != 0) {
device_printf(nic->dev, "Failed to allocate DMA safe memory for"
"descriptors ring\n");
goto dmamem_fail;
}
err = bus_dmamap_load(
dmem->dmat,
dmem->dmap,
dmem->base,
(q_len * desc_size), /* allocation size */
nicvf_dmamap_q_cb, /* map to DMA address cb. */
&dmem->phys_base, /* physical address */
BUS_DMA_NOWAIT);
if (err != 0) {
device_printf(nic->dev,
"Cannot load DMA map of descriptors ring\n");
goto dmamap_fail;
}
dmem->q_len = q_len;
dmem->size = (desc_size * q_len);
return (0);
dmamap_fail:
bus_dmamem_free(dmem->dmat, dmem->base, dmem->dmap);
dmem->phys_base = 0;
dmamem_fail:
err_dmat = bus_dma_tag_destroy(dmem->dmat);
dmem->base = NULL;
KASSERT(err_dmat == 0,
("%s: Trying to destroy BUSY DMA tag", __func__));
return (err);
}
/* Free queue's descriptor memory */
static void
nicvf_free_q_desc_mem(struct nicvf *nic, struct q_desc_mem *dmem)
{
int err;
if ((dmem == NULL) || (dmem->base == NULL))
return;
/* Unload a map */
bus_dmamap_sync(dmem->dmat, dmem->dmap, BUS_DMASYNC_POSTREAD);
bus_dmamap_unload(dmem->dmat, dmem->dmap);
/* Free DMA memory */
bus_dmamem_free(dmem->dmat, dmem->base, dmem->dmap);
/* Destroy DMA tag */
err = bus_dma_tag_destroy(dmem->dmat);
KASSERT(err == 0,
("%s: Trying to destroy BUSY DMA tag", __func__));
dmem->phys_base = 0;
dmem->base = NULL;
}
/*
* Allocate buffer for packet reception
* HW returns memory address where packet is DMA'ed but not a pointer
* into RBDR ring, so save buffer address at the start of fragment and
* align the start address to a cache aligned address
*/
static __inline int
nicvf_alloc_rcv_buffer(struct nicvf *nic, struct rbdr *rbdr,
bus_dmamap_t dmap, int mflags, uint32_t buf_len, bus_addr_t *rbuf)
{
struct mbuf *mbuf;
struct rbuf_info *rinfo;
bus_dma_segment_t segs[1];
int nsegs;
int err;
mbuf = m_getjcl(mflags, MT_DATA, M_PKTHDR, MCLBYTES);
if (mbuf == NULL)
return (ENOMEM);
/*
* The length is equal to the actual length + one 128b line
* used as a room for rbuf_info structure.
*/
mbuf->m_len = mbuf->m_pkthdr.len = buf_len;
err = bus_dmamap_load_mbuf_sg(rbdr->rbdr_buff_dmat, dmap, mbuf, segs,
&nsegs, BUS_DMA_NOWAIT);
if (err != 0) {
device_printf(nic->dev,
"Failed to map mbuf into DMA visible memory, err: %d\n",
err);
m_freem(mbuf);
bus_dmamap_destroy(rbdr->rbdr_buff_dmat, dmap);
return (err);
}
if (nsegs != 1)
panic("Unexpected number of DMA segments for RB: %d", nsegs);
/*
* Now use the room for rbuf_info structure
* and adjust mbuf data and length.
*/
rinfo = (struct rbuf_info *)mbuf->m_data;
m_adj(mbuf, NICVF_RCV_BUF_ALIGN_BYTES);
rinfo->dmat = rbdr->rbdr_buff_dmat;
rinfo->dmap = dmap;
rinfo->mbuf = mbuf;
*rbuf = segs[0].ds_addr + NICVF_RCV_BUF_ALIGN_BYTES;
return (0);
}
/* Retrieve mbuf for received packet */
static struct mbuf *
nicvf_rb_ptr_to_mbuf(struct nicvf *nic, bus_addr_t rb_ptr)
{
struct mbuf *mbuf;
struct rbuf_info *rinfo;
/* Get buffer start address and alignment offset */
rinfo = GET_RBUF_INFO(PHYS_TO_DMAP(rb_ptr));
/* Now retrieve mbuf to give to stack */
mbuf = rinfo->mbuf;
if (__predict_false(mbuf == NULL)) {
panic("%s: Received packet fragment with NULL mbuf",
device_get_nameunit(nic->dev));
}
/*
* Clear the mbuf in the descriptor to indicate
* that this slot is processed and free to use.
*/
rinfo->mbuf = NULL;
bus_dmamap_sync(rinfo->dmat, rinfo->dmap, BUS_DMASYNC_POSTREAD);
bus_dmamap_unload(rinfo->dmat, rinfo->dmap);
return (mbuf);
}
/* Allocate RBDR ring and populate receive buffers */
static int
nicvf_init_rbdr(struct nicvf *nic, struct rbdr *rbdr, int ring_len,
int buf_size, int qidx)
{
bus_dmamap_t dmap;
bus_addr_t rbuf;
struct rbdr_entry_t *desc;
int idx;
int err;
/* Allocate rbdr descriptors ring */
err = nicvf_alloc_q_desc_mem(nic, &rbdr->dmem, ring_len,
sizeof(struct rbdr_entry_t), NICVF_RCV_BUF_ALIGN_BYTES);
if (err != 0) {
device_printf(nic->dev,
"Failed to create RBDR descriptors ring\n");
return (err);
}
rbdr->desc = rbdr->dmem.base;
/*
* Buffer size has to be in multiples of 128 bytes.
* Make room for metadata of size of one line (128 bytes).
*/
rbdr->dma_size = buf_size - NICVF_RCV_BUF_ALIGN_BYTES;
rbdr->enable = TRUE;
rbdr->thresh = RBDR_THRESH;
rbdr->nic = nic;
rbdr->idx = qidx;
/*
* Create DMA tag for Rx buffers.
* Each map created using this tag is intended to store Rx payload for
* one fragment and one header structure containing rbuf_info (thus
* additional 128 byte line since RB must be a multiple of 128 byte
* cache line).
*/
if (buf_size > MCLBYTES) {
device_printf(nic->dev,
"Buffer size to large for mbuf cluster\n");
return (EINVAL);
}
err = bus_dma_tag_create(
bus_get_dma_tag(nic->dev), /* parent tag */
NICVF_RCV_BUF_ALIGN_BYTES, /* alignment */
0, /* boundary */
DMAP_MAX_PHYSADDR, /* lowaddr */
DMAP_MIN_PHYSADDR, /* highaddr */
NULL, NULL, /* filtfunc, filtfuncarg */
roundup2(buf_size, MCLBYTES), /* maxsize */
1, /* nsegments */
roundup2(buf_size, MCLBYTES), /* maxsegsize */
0, /* flags */
NULL, NULL, /* lockfunc, lockfuncarg */
&rbdr->rbdr_buff_dmat); /* dmat */
if (err != 0) {
device_printf(nic->dev,
"Failed to create busdma tag for RBDR buffers\n");
return (err);
}
rbdr->rbdr_buff_dmaps = malloc(sizeof(*rbdr->rbdr_buff_dmaps) *
ring_len, M_NICVF, (M_WAITOK | M_ZERO));
for (idx = 0; idx < ring_len; idx++) {
err = bus_dmamap_create(rbdr->rbdr_buff_dmat, 0, &dmap);
if (err != 0) {
device_printf(nic->dev,
"Failed to create DMA map for RB\n");
return (err);
}
rbdr->rbdr_buff_dmaps[idx] = dmap;
err = nicvf_alloc_rcv_buffer(nic, rbdr, dmap, M_WAITOK,
DMA_BUFFER_LEN, &rbuf);
if (err != 0)
return (err);
desc = GET_RBDR_DESC(rbdr, idx);
desc->buf_addr = (rbuf >> NICVF_RCV_BUF_ALIGN);
}
/* Allocate taskqueue */
TASK_INIT(&rbdr->rbdr_task, 0, nicvf_rbdr_task, rbdr);
TASK_INIT(&rbdr->rbdr_task_nowait, 0, nicvf_rbdr_task_nowait, rbdr);
rbdr->rbdr_taskq = taskqueue_create_fast("nicvf_rbdr_taskq", M_WAITOK,
taskqueue_thread_enqueue, &rbdr->rbdr_taskq);
taskqueue_start_threads(&rbdr->rbdr_taskq, 1, PI_NET, "%s: rbdr_taskq",
device_get_nameunit(nic->dev));
return (0);
}
/* Free RBDR ring and its receive buffers */
static void
nicvf_free_rbdr(struct nicvf *nic, struct rbdr *rbdr)
{
struct mbuf *mbuf;
struct queue_set *qs;
struct rbdr_entry_t *desc;
struct rbuf_info *rinfo;
bus_addr_t buf_addr;
int head, tail, idx;
int err;
qs = nic->qs;
if ((qs == NULL) || (rbdr == NULL))
return;
rbdr->enable = FALSE;
if (rbdr->rbdr_taskq != NULL) {
/* Remove tasks */
while (taskqueue_cancel(rbdr->rbdr_taskq,
&rbdr->rbdr_task_nowait, NULL) != 0) {
/* Finish the nowait task first */
taskqueue_drain(rbdr->rbdr_taskq,
&rbdr->rbdr_task_nowait);
}
taskqueue_free(rbdr->rbdr_taskq);
rbdr->rbdr_taskq = NULL;
while (taskqueue_cancel(taskqueue_thread,
&rbdr->rbdr_task, NULL) != 0) {
/* Now finish the sleepable task */
taskqueue_drain(taskqueue_thread, &rbdr->rbdr_task);
}
}
/*
* Free all of the memory under the RB descriptors.
* There are assumptions here:
* 1. Corresponding RBDR is disabled
* - it is safe to operate using head and tail indexes
* 2. All bffers that were received are properly freed by
* the receive handler
* - there is no need to unload DMA map and free MBUF for other
* descriptors than unused ones
*/
if (rbdr->rbdr_buff_dmat != NULL) {
head = rbdr->head;
tail = rbdr->tail;
while (head != tail) {
desc = GET_RBDR_DESC(rbdr, head);
buf_addr = desc->buf_addr << NICVF_RCV_BUF_ALIGN;
rinfo = GET_RBUF_INFO(PHYS_TO_DMAP(buf_addr));
bus_dmamap_unload(rbdr->rbdr_buff_dmat, rinfo->dmap);
mbuf = rinfo->mbuf;
/* This will destroy everything including rinfo! */
m_freem(mbuf);
head++;
head &= (rbdr->dmem.q_len - 1);
}
/* Free tail descriptor */
desc = GET_RBDR_DESC(rbdr, tail);
buf_addr = desc->buf_addr << NICVF_RCV_BUF_ALIGN;
rinfo = GET_RBUF_INFO(PHYS_TO_DMAP(buf_addr));
bus_dmamap_unload(rbdr->rbdr_buff_dmat, rinfo->dmap);
mbuf = rinfo->mbuf;
/* This will destroy everything including rinfo! */
m_freem(mbuf);
/* Destroy DMA maps */
for (idx = 0; idx < qs->rbdr_len; idx++) {
if (rbdr->rbdr_buff_dmaps[idx] == NULL)
continue;
err = bus_dmamap_destroy(rbdr->rbdr_buff_dmat,
rbdr->rbdr_buff_dmaps[idx]);
KASSERT(err == 0,
("%s: Could not destroy DMA map for RB, desc: %d",
__func__, idx));
rbdr->rbdr_buff_dmaps[idx] = NULL;
}
/* Now destroy the tag */
err = bus_dma_tag_destroy(rbdr->rbdr_buff_dmat);
KASSERT(err == 0,
("%s: Trying to destroy BUSY DMA tag", __func__));
rbdr->head = 0;
rbdr->tail = 0;
}
/* Free RBDR ring */
nicvf_free_q_desc_mem(nic, &rbdr->dmem);
}
/*
* Refill receive buffer descriptors with new buffers.
*/
static int
nicvf_refill_rbdr(struct rbdr *rbdr, int mflags)
{
struct nicvf *nic;
struct queue_set *qs;
int rbdr_idx;
int tail, qcount;
int refill_rb_cnt;
struct rbdr_entry_t *desc;
bus_dmamap_t dmap;
bus_addr_t rbuf;
boolean_t rb_alloc_fail;
int new_rb;
rb_alloc_fail = TRUE;
new_rb = 0;
nic = rbdr->nic;
qs = nic->qs;
rbdr_idx = rbdr->idx;
/* Check if it's enabled */
if (!rbdr->enable)
return (0);
/* Get no of desc's to be refilled */
qcount = nicvf_queue_reg_read(nic, NIC_QSET_RBDR_0_1_STATUS0, rbdr_idx);
qcount &= 0x7FFFF;
/* Doorbell can be ringed with a max of ring size minus 1 */
if (qcount >= (qs->rbdr_len - 1)) {
rb_alloc_fail = FALSE;
goto out;
} else
refill_rb_cnt = qs->rbdr_len - qcount - 1;
/* Start filling descs from tail */
tail = nicvf_queue_reg_read(nic, NIC_QSET_RBDR_0_1_TAIL, rbdr_idx) >> 3;
while (refill_rb_cnt) {
tail++;
tail &= (rbdr->dmem.q_len - 1);
dmap = rbdr->rbdr_buff_dmaps[tail];
if (nicvf_alloc_rcv_buffer(nic, rbdr, dmap, mflags,
DMA_BUFFER_LEN, &rbuf)) {
/* Something went wrong. Resign */
break;
}
desc = GET_RBDR_DESC(rbdr, tail);
desc->buf_addr = (rbuf >> NICVF_RCV_BUF_ALIGN);
refill_rb_cnt--;
new_rb++;
}
/* make sure all memory stores are done before ringing doorbell */
wmb();
/* Check if buffer allocation failed */
if (refill_rb_cnt == 0)
rb_alloc_fail = FALSE;
/* Notify HW */
nicvf_queue_reg_write(nic, NIC_QSET_RBDR_0_1_DOOR,
rbdr_idx, new_rb);
out:
if (!rb_alloc_fail) {
/*
* Re-enable RBDR interrupts only
* if buffer allocation is success.
*/
nicvf_enable_intr(nic, NICVF_INTR_RBDR, rbdr_idx);
return (0);
}
return (ENOMEM);
}
/* Refill RBs even if sleep is needed to reclaim memory */
static void
nicvf_rbdr_task(void *arg, int pending)
{
struct rbdr *rbdr;
int err;
rbdr = (struct rbdr *)arg;
err = nicvf_refill_rbdr(rbdr, M_WAITOK);
if (__predict_false(err != 0)) {
panic("%s: Failed to refill RBs even when sleep enabled",
__func__);
}
}
/* Refill RBs as soon as possible without waiting */
static void
nicvf_rbdr_task_nowait(void *arg, int pending)
{
struct rbdr *rbdr;
int err;
rbdr = (struct rbdr *)arg;
err = nicvf_refill_rbdr(rbdr, M_NOWAIT);
if (err != 0) {
/*
* Schedule another, sleepable kernel thread
* that will for sure refill the buffers.
*/
taskqueue_enqueue(taskqueue_thread, &rbdr->rbdr_task);
}
}
static int
nicvf_rcv_pkt_handler(struct nicvf *nic, struct cmp_queue *cq,
struct cqe_rx_t *cqe_rx, int cqe_type)
{
struct mbuf *mbuf;
struct rcv_queue *rq;
int rq_idx;
int err = 0;
rq_idx = cqe_rx->rq_idx;
rq = &nic->qs->rq[rq_idx];
/* Check for errors */
err = nicvf_check_cqe_rx_errs(nic, cq, cqe_rx);
if (err && !cqe_rx->rb_cnt)
return (0);
mbuf = nicvf_get_rcv_mbuf(nic, cqe_rx);
if (mbuf == NULL) {
dprintf(nic->dev, "Packet not received\n");
return (0);
}
/* If error packet */
if (err != 0) {
m_freem(mbuf);
return (0);
}
if (rq->lro_enabled &&
((cqe_rx->l3_type == L3TYPE_IPV4) && (cqe_rx->l4_type == L4TYPE_TCP)) &&
(mbuf->m_pkthdr.csum_flags & (CSUM_DATA_VALID | CSUM_PSEUDO_HDR)) ==
(CSUM_DATA_VALID | CSUM_PSEUDO_HDR)) {
/*
* At this point it is known that there are no errors in the
* packet. Attempt to LRO enqueue. Send to stack if no resources
* or enqueue error.
*/
if ((rq->lro.lro_cnt != 0) &&
(tcp_lro_rx(&rq->lro, mbuf, 0) == 0))
return (0);
}
/*
* Push this packet to the stack later to avoid
* unlocking completion task in the middle of work.
*/
err = buf_ring_enqueue(cq->rx_br, mbuf);
if (err != 0) {
/*
* Failed to enqueue this mbuf.
* We don't drop it, just schedule another task.
*/
return (err);
}
return (0);
}
static void
nicvf_snd_pkt_handler(struct nicvf *nic, struct cmp_queue *cq,
struct cqe_send_t *cqe_tx, int cqe_type)
{
bus_dmamap_t dmap;
struct mbuf *mbuf;
struct snd_queue *sq;
struct sq_hdr_subdesc *hdr;
mbuf = NULL;
sq = &nic->qs->sq[cqe_tx->sq_idx];
hdr = (struct sq_hdr_subdesc *)GET_SQ_DESC(sq, cqe_tx->sqe_ptr);
if (hdr->subdesc_type != SQ_DESC_TYPE_HEADER)
return;
dprintf(nic->dev,
"%s Qset #%d SQ #%d SQ ptr #%d subdesc count %d\n",
__func__, cqe_tx->sq_qs, cqe_tx->sq_idx,
cqe_tx->sqe_ptr, hdr->subdesc_cnt);
dmap = (bus_dmamap_t)sq->snd_buff[cqe_tx->sqe_ptr].dmap;
bus_dmamap_unload(sq->snd_buff_dmat, dmap);
mbuf = (struct mbuf *)sq->snd_buff[cqe_tx->sqe_ptr].mbuf;
if (mbuf != NULL) {
m_freem(mbuf);
sq->snd_buff[cqe_tx->sqe_ptr].mbuf = NULL;
nicvf_put_sq_desc(sq, hdr->subdesc_cnt + 1);
}
nicvf_check_cqe_tx_errs(nic, cq, cqe_tx);
}
static int
nicvf_cq_intr_handler(struct nicvf *nic, uint8_t cq_idx)
{
struct mbuf *mbuf;
struct ifnet *ifp;
int processed_cqe, work_done = 0, tx_done = 0;
int cqe_count, cqe_head;
struct queue_set *qs = nic->qs;
struct cmp_queue *cq = &qs->cq[cq_idx];
struct snd_queue *sq = &qs->sq[cq_idx];
struct rcv_queue *rq;
struct cqe_rx_t *cq_desc;
struct lro_ctrl *lro;
int rq_idx;
int cmp_err;
NICVF_CMP_LOCK(cq);
cmp_err = 0;
processed_cqe = 0;
/* Get no of valid CQ entries to process */
cqe_count = nicvf_queue_reg_read(nic, NIC_QSET_CQ_0_7_STATUS, cq_idx);
cqe_count &= CQ_CQE_COUNT;
if (cqe_count == 0)
goto out;
/* Get head of the valid CQ entries */
cqe_head = nicvf_queue_reg_read(nic, NIC_QSET_CQ_0_7_HEAD, cq_idx) >> 9;
cqe_head &= 0xFFFF;
dprintf(nic->dev, "%s CQ%d cqe_count %d cqe_head %d\n",
__func__, cq_idx, cqe_count, cqe_head);
while (processed_cqe < cqe_count) {
/* Get the CQ descriptor */
cq_desc = (struct cqe_rx_t *)GET_CQ_DESC(cq, cqe_head);
cqe_head++;
cqe_head &= (cq->dmem.q_len - 1);
/* Prefetch next CQ descriptor */
__builtin_prefetch((struct cqe_rx_t *)GET_CQ_DESC(cq, cqe_head));
dprintf(nic->dev, "CQ%d cq_desc->cqe_type %d\n", cq_idx,
cq_desc->cqe_type);
switch (cq_desc->cqe_type) {
case CQE_TYPE_RX:
cmp_err = nicvf_rcv_pkt_handler(nic, cq, cq_desc,
CQE_TYPE_RX);
if (__predict_false(cmp_err != 0)) {
/*
* Ups. Cannot finish now.
* Let's try again later.
*/
goto done;
}
work_done++;
break;
case CQE_TYPE_SEND:
nicvf_snd_pkt_handler(nic, cq, (void *)cq_desc,
CQE_TYPE_SEND);
tx_done++;
break;
case CQE_TYPE_INVALID:
case CQE_TYPE_RX_SPLIT:
case CQE_TYPE_RX_TCP:
case CQE_TYPE_SEND_PTP:
/* Ignore for now */
break;
}
processed_cqe++;
}
done:
dprintf(nic->dev,
"%s CQ%d processed_cqe %d work_done %d\n",
__func__, cq_idx, processed_cqe, work_done);
/* Ring doorbell to inform H/W to reuse processed CQEs */
nicvf_queue_reg_write(nic, NIC_QSET_CQ_0_7_DOOR, cq_idx, processed_cqe);
if ((tx_done > 0) &&
((if_getdrvflags(nic->ifp) & IFF_DRV_RUNNING) != 0)) {
/* Reenable TXQ if its stopped earlier due to SQ full */
if_setdrvflagbits(nic->ifp, IFF_DRV_RUNNING, IFF_DRV_OACTIVE);
taskqueue_enqueue(sq->snd_taskq, &sq->snd_task);
}
out:
/*
* Flush any outstanding LRO work
*/
rq_idx = cq_idx;
rq = &nic->qs->rq[rq_idx];
lro = &rq->lro;
tcp_lro_flush_all(lro);
NICVF_CMP_UNLOCK(cq);
ifp = nic->ifp;
/* Push received MBUFs to the stack */
while (!buf_ring_empty(cq->rx_br)) {
mbuf = buf_ring_dequeue_mc(cq->rx_br);
if (__predict_true(mbuf != NULL))
(*ifp->if_input)(ifp, mbuf);
}
return (cmp_err);
}
/*
* Qset error interrupt handler
*
* As of now only CQ errors are handled
*/
static void
nicvf_qs_err_task(void *arg, int pending)
{
struct nicvf *nic;
struct queue_set *qs;
int qidx;
uint64_t status;
boolean_t enable = TRUE;
nic = (struct nicvf *)arg;
qs = nic->qs;
/* Deactivate network interface */
if_setdrvflagbits(nic->ifp, IFF_DRV_OACTIVE, IFF_DRV_RUNNING);
/* Check if it is CQ err */
for (qidx = 0; qidx < qs->cq_cnt; qidx++) {
status = nicvf_queue_reg_read(nic, NIC_QSET_CQ_0_7_STATUS,
qidx);
if ((status & CQ_ERR_MASK) == 0)
continue;
/* Process already queued CQEs and reconfig CQ */
nicvf_disable_intr(nic, NICVF_INTR_CQ, qidx);
nicvf_sq_disable(nic, qidx);
(void)nicvf_cq_intr_handler(nic, qidx);
nicvf_cmp_queue_config(nic, qs, qidx, enable);
nicvf_sq_free_used_descs(nic, &qs->sq[qidx], qidx);
nicvf_sq_enable(nic, &qs->sq[qidx], qidx);
nicvf_enable_intr(nic, NICVF_INTR_CQ, qidx);
}
if_setdrvflagbits(nic->ifp, IFF_DRV_RUNNING, IFF_DRV_OACTIVE);
/* Re-enable Qset error interrupt */
nicvf_enable_intr(nic, NICVF_INTR_QS_ERR, 0);
}
static void
nicvf_cmp_task(void *arg, int pending)
{
struct cmp_queue *cq;
struct nicvf *nic;
int cmp_err;
cq = (struct cmp_queue *)arg;
nic = cq->nic;
/* Handle CQ descriptors */
cmp_err = nicvf_cq_intr_handler(nic, cq->idx);
if (__predict_false(cmp_err != 0)) {
/*
* Schedule another thread here since we did not
* process the entire CQ due to Tx or Rx CQ parse error.
*/
taskqueue_enqueue(cq->cmp_taskq, &cq->cmp_task);
}
nicvf_clear_intr(nic, NICVF_INTR_CQ, cq->idx);
/* Reenable interrupt (previously disabled in nicvf_intr_handler() */
nicvf_enable_intr(nic, NICVF_INTR_CQ, cq->idx);
}
/* Initialize completion queue */
static int
nicvf_init_cmp_queue(struct nicvf *nic, struct cmp_queue *cq, int q_len,
int qidx)
{
int err;
/* Initizalize lock */
snprintf(cq->mtx_name, sizeof(cq->mtx_name), "%s: CQ(%d) lock",
device_get_nameunit(nic->dev), qidx);
mtx_init(&cq->mtx, cq->mtx_name, NULL, MTX_DEF);
err = nicvf_alloc_q_desc_mem(nic, &cq->dmem, q_len, CMP_QUEUE_DESC_SIZE,
NICVF_CQ_BASE_ALIGN_BYTES);
if (err != 0) {
device_printf(nic->dev,
"Could not allocate DMA memory for CQ\n");
return (err);
}
cq->desc = cq->dmem.base;
cq->thresh = pass1_silicon(nic->dev) ? 0 : CMP_QUEUE_CQE_THRESH;
cq->nic = nic;
cq->idx = qidx;
nic->cq_coalesce_usecs = (CMP_QUEUE_TIMER_THRESH * 0.05) - 1;
cq->rx_br = buf_ring_alloc(CMP_QUEUE_LEN * 8, M_DEVBUF, M_WAITOK,
&cq->mtx);
/* Allocate taskqueue */
TASK_INIT(&cq->cmp_task, 0, nicvf_cmp_task, cq);
cq->cmp_taskq = taskqueue_create_fast("nicvf_cmp_taskq", M_WAITOK,
taskqueue_thread_enqueue, &cq->cmp_taskq);
taskqueue_start_threads(&cq->cmp_taskq, 1, PI_NET, "%s: cmp_taskq(%d)",
device_get_nameunit(nic->dev), qidx);
return (0);
}
static void
nicvf_free_cmp_queue(struct nicvf *nic, struct cmp_queue *cq)
{
if (cq == NULL)
return;
/*
* The completion queue itself should be disabled by now
* (ref. nicvf_snd_queue_config()).
* Ensure that it is safe to disable it or panic.
*/
if (cq->enable)
panic("%s: Trying to free working CQ(%d)", __func__, cq->idx);
if (cq->cmp_taskq != NULL) {
/* Remove task */
while (taskqueue_cancel(cq->cmp_taskq, &cq->cmp_task, NULL) != 0)
taskqueue_drain(cq->cmp_taskq, &cq->cmp_task);
taskqueue_free(cq->cmp_taskq);
cq->cmp_taskq = NULL;
}
/*
* Completion interrupt will possibly enable interrupts again
* so disable interrupting now after we finished processing
* completion task. It is safe to do so since the corresponding CQ
* was already disabled.
*/
nicvf_disable_intr(nic, NICVF_INTR_CQ, cq->idx);
nicvf_clear_intr(nic, NICVF_INTR_CQ, cq->idx);
NICVF_CMP_LOCK(cq);
nicvf_free_q_desc_mem(nic, &cq->dmem);
drbr_free(cq->rx_br, M_DEVBUF);
NICVF_CMP_UNLOCK(cq);
mtx_destroy(&cq->mtx);
memset(cq->mtx_name, 0, sizeof(cq->mtx_name));
}
int
nicvf_xmit_locked(struct snd_queue *sq)
{
struct nicvf *nic;
struct ifnet *ifp;
struct mbuf *next;
int err;
NICVF_TX_LOCK_ASSERT(sq);
nic = sq->nic;
ifp = nic->ifp;
err = 0;
while ((next = drbr_peek(ifp, sq->br)) != NULL) {
err = nicvf_tx_mbuf_locked(sq, &next);
if (err != 0) {
if (next == NULL)
drbr_advance(ifp, sq->br);
else
drbr_putback(ifp, sq->br, next);
break;
}
drbr_advance(ifp, sq->br);
/* Send a copy of the frame to the BPF listener */
ETHER_BPF_MTAP(ifp, next);
}
return (err);
}
static void
nicvf_snd_task(void *arg, int pending)
{
struct snd_queue *sq = (struct snd_queue *)arg;
struct nicvf *nic;
struct ifnet *ifp;
int err;
nic = sq->nic;
ifp = nic->ifp;
/*
* Skip sending anything if the driver is not running,
* SQ full or link is down.
*/
if (((if_getdrvflags(ifp) & (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) !=
IFF_DRV_RUNNING) || !nic->link_up)
return;
NICVF_TX_LOCK(sq);
err = nicvf_xmit_locked(sq);
NICVF_TX_UNLOCK(sq);
/* Try again */
if (err != 0)
taskqueue_enqueue(sq->snd_taskq, &sq->snd_task);
}
/* Initialize transmit queue */
static int
nicvf_init_snd_queue(struct nicvf *nic, struct snd_queue *sq, int q_len,
int qidx)
{
size_t i;
int err;
/* Initizalize TX lock for this queue */
snprintf(sq->mtx_name, sizeof(sq->mtx_name), "%s: SQ(%d) lock",
device_get_nameunit(nic->dev), qidx);
mtx_init(&sq->mtx, sq->mtx_name, NULL, MTX_DEF);
NICVF_TX_LOCK(sq);
/* Allocate buffer ring */
sq->br = buf_ring_alloc(q_len / MIN_SQ_DESC_PER_PKT_XMIT, M_DEVBUF,
M_NOWAIT, &sq->mtx);
if (sq->br == NULL) {
device_printf(nic->dev,
"ERROR: Could not set up buf ring for SQ(%d)\n", qidx);
err = ENOMEM;
goto error;
}
/* Allocate DMA memory for Tx descriptors */
err = nicvf_alloc_q_desc_mem(nic, &sq->dmem, q_len, SND_QUEUE_DESC_SIZE,
NICVF_SQ_BASE_ALIGN_BYTES);
if (err != 0) {
device_printf(nic->dev,
"Could not allocate DMA memory for SQ\n");
goto error;
}
sq->desc = sq->dmem.base;
sq->head = sq->tail = 0;
atomic_store_rel_int(&sq->free_cnt, q_len - 1);
sq->thresh = SND_QUEUE_THRESH;
sq->idx = qidx;
sq->nic = nic;
/*
* Allocate DMA maps for Tx buffers
*/
/* Create DMA tag first */
err = bus_dma_tag_create(
bus_get_dma_tag(nic->dev), /* parent tag */
1, /* alignment */
0, /* boundary */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filtfunc, filtfuncarg */
NICVF_TSO_MAXSIZE, /* maxsize */
NICVF_TSO_NSEGS, /* nsegments */
MCLBYTES, /* maxsegsize */
0, /* flags */
NULL, NULL, /* lockfunc, lockfuncarg */
&sq->snd_buff_dmat); /* dmat */
if (err != 0) {
device_printf(nic->dev,
"Failed to create busdma tag for Tx buffers\n");
goto error;
}
/* Allocate send buffers array */
sq->snd_buff = malloc(sizeof(*sq->snd_buff) * q_len, M_NICVF,
(M_NOWAIT | M_ZERO));
if (sq->snd_buff == NULL) {
device_printf(nic->dev,
"Could not allocate memory for Tx buffers array\n");
err = ENOMEM;
goto error;
}
/* Now populate maps */
for (i = 0; i < q_len; i++) {
err = bus_dmamap_create(sq->snd_buff_dmat, 0,
&sq->snd_buff[i].dmap);
if (err != 0) {
device_printf(nic->dev,
"Failed to create DMA maps for Tx buffers\n");
goto error;
}
}
NICVF_TX_UNLOCK(sq);
/* Allocate taskqueue */
TASK_INIT(&sq->snd_task, 0, nicvf_snd_task, sq);
sq->snd_taskq = taskqueue_create_fast("nicvf_snd_taskq", M_WAITOK,
taskqueue_thread_enqueue, &sq->snd_taskq);
taskqueue_start_threads(&sq->snd_taskq, 1, PI_NET, "%s: snd_taskq(%d)",
device_get_nameunit(nic->dev), qidx);
return (0);
error:
NICVF_TX_UNLOCK(sq);
return (err);
}
static void
nicvf_free_snd_queue(struct nicvf *nic, struct snd_queue *sq)
{
struct queue_set *qs = nic->qs;
size_t i;
int err;
if (sq == NULL)
return;
if (sq->snd_taskq != NULL) {
/* Remove task */
while (taskqueue_cancel(sq->snd_taskq, &sq->snd_task, NULL) != 0)
taskqueue_drain(sq->snd_taskq, &sq->snd_task);
taskqueue_free(sq->snd_taskq);
sq->snd_taskq = NULL;
}
NICVF_TX_LOCK(sq);
if (sq->snd_buff_dmat != NULL) {
if (sq->snd_buff != NULL) {
for (i = 0; i < qs->sq_len; i++) {
m_freem(sq->snd_buff[i].mbuf);
sq->snd_buff[i].mbuf = NULL;
bus_dmamap_unload(sq->snd_buff_dmat,
sq->snd_buff[i].dmap);
err = bus_dmamap_destroy(sq->snd_buff_dmat,
sq->snd_buff[i].dmap);
/*
* If bus_dmamap_destroy fails it can cause
* random panic later if the tag is also
* destroyed in the process.
*/
KASSERT(err == 0,
("%s: Could not destroy DMA map for SQ",
__func__));
}
}
free(sq->snd_buff, M_NICVF);
err = bus_dma_tag_destroy(sq->snd_buff_dmat);
KASSERT(err == 0,
("%s: Trying to destroy BUSY DMA tag", __func__));
}
/* Free private driver ring for this send queue */
if (sq->br != NULL)
drbr_free(sq->br, M_DEVBUF);
if (sq->dmem.base != NULL)
nicvf_free_q_desc_mem(nic, &sq->dmem);
NICVF_TX_UNLOCK(sq);
/* Destroy Tx lock */
mtx_destroy(&sq->mtx);
memset(sq->mtx_name, 0, sizeof(sq->mtx_name));
}
static void
nicvf_reclaim_snd_queue(struct nicvf *nic, struct queue_set *qs, int qidx)
{
/* Disable send queue */
nicvf_queue_reg_write(nic, NIC_QSET_SQ_0_7_CFG, qidx, 0);
/* Check if SQ is stopped */
if (nicvf_poll_reg(nic, qidx, NIC_QSET_SQ_0_7_STATUS, 21, 1, 0x01))
return;
/* Reset send queue */
nicvf_queue_reg_write(nic, NIC_QSET_SQ_0_7_CFG, qidx, NICVF_SQ_RESET);
}
static void
nicvf_reclaim_rcv_queue(struct nicvf *nic, struct queue_set *qs, int qidx)
{
union nic_mbx mbx = {};
/* Make sure all packets in the pipeline are written back into mem */
mbx.msg.msg = NIC_MBOX_MSG_RQ_SW_SYNC;
nicvf_send_msg_to_pf(nic, &mbx);
}
static void
nicvf_reclaim_cmp_queue(struct nicvf *nic, struct queue_set *qs, int qidx)
{
/* Disable timer threshold (doesn't get reset upon CQ reset */
nicvf_queue_reg_write(nic, NIC_QSET_CQ_0_7_CFG2, qidx, 0);
/* Disable completion queue */
nicvf_queue_reg_write(nic, NIC_QSET_CQ_0_7_CFG, qidx, 0);
/* Reset completion queue */
nicvf_queue_reg_write(nic, NIC_QSET_CQ_0_7_CFG, qidx, NICVF_CQ_RESET);
}
static void
nicvf_reclaim_rbdr(struct nicvf *nic, struct rbdr *rbdr, int qidx)
{
uint64_t tmp, fifo_state;
int timeout = 10;
/* Save head and tail pointers for feeing up buffers */
rbdr->head =
nicvf_queue_reg_read(nic, NIC_QSET_RBDR_0_1_HEAD, qidx) >> 3;
rbdr->tail =
nicvf_queue_reg_read(nic, NIC_QSET_RBDR_0_1_TAIL, qidx) >> 3;
/*
* If RBDR FIFO is in 'FAIL' state then do a reset first
* before relaiming.
*/
fifo_state = nicvf_queue_reg_read(nic, NIC_QSET_RBDR_0_1_STATUS0, qidx);
if (((fifo_state >> 62) & 0x03) == 0x3) {
nicvf_queue_reg_write(nic, NIC_QSET_RBDR_0_1_CFG,
qidx, NICVF_RBDR_RESET);
}
/* Disable RBDR */
nicvf_queue_reg_write(nic, NIC_QSET_RBDR_0_1_CFG, qidx, 0);
if (nicvf_poll_reg(nic, qidx, NIC_QSET_RBDR_0_1_STATUS0, 62, 2, 0x00))
return;
while (1) {
tmp = nicvf_queue_reg_read(nic,
NIC_QSET_RBDR_0_1_PREFETCH_STATUS, qidx);
if ((tmp & 0xFFFFFFFF) == ((tmp >> 32) & 0xFFFFFFFF))
break;
DELAY(1000);
timeout--;
if (!timeout) {
device_printf(nic->dev,
"Failed polling on prefetch status\n");
return;
}
}
nicvf_queue_reg_write(nic, NIC_QSET_RBDR_0_1_CFG, qidx,
NICVF_RBDR_RESET);
if (nicvf_poll_reg(nic, qidx, NIC_QSET_RBDR_0_1_STATUS0, 62, 2, 0x02))
return;
nicvf_queue_reg_write(nic, NIC_QSET_RBDR_0_1_CFG, qidx, 0x00);
if (nicvf_poll_reg(nic, qidx, NIC_QSET_RBDR_0_1_STATUS0, 62, 2, 0x00))
return;
}
/* Configures receive queue */
static void
nicvf_rcv_queue_config(struct nicvf *nic, struct queue_set *qs,
int qidx, bool enable)
{
union nic_mbx mbx = {};
struct rcv_queue *rq;
struct rq_cfg rq_cfg;
struct ifnet *ifp;
struct lro_ctrl *lro;
ifp = nic->ifp;
rq = &qs->rq[qidx];
rq->enable = enable;
lro = &rq->lro;
/* Disable receive queue */
nicvf_queue_reg_write(nic, NIC_QSET_RQ_0_7_CFG, qidx, 0);
if (!rq->enable) {
nicvf_reclaim_rcv_queue(nic, qs, qidx);
/* Free LRO memory */
tcp_lro_free(lro);
rq->lro_enabled = FALSE;
return;
}
/* Configure LRO if enabled */
rq->lro_enabled = FALSE;
if ((if_getcapenable(ifp) & IFCAP_LRO) != 0) {
if (tcp_lro_init(lro) != 0) {
device_printf(nic->dev,
"Failed to initialize LRO for RXQ%d\n", qidx);
} else {
rq->lro_enabled = TRUE;
lro->ifp = nic->ifp;
}
}
rq->cq_qs = qs->vnic_id;
rq->cq_idx = qidx;
rq->start_rbdr_qs = qs->vnic_id;
rq->start_qs_rbdr_idx = qs->rbdr_cnt - 1;
rq->cont_rbdr_qs = qs->vnic_id;
rq->cont_qs_rbdr_idx = qs->rbdr_cnt - 1;
/* all writes of RBDR data to be loaded into L2 Cache as well*/
rq->caching = 1;
/* Send a mailbox msg to PF to config RQ */
mbx.rq.msg = NIC_MBOX_MSG_RQ_CFG;
mbx.rq.qs_num = qs->vnic_id;
mbx.rq.rq_num = qidx;
mbx.rq.cfg = (rq->caching << 26) | (rq->cq_qs << 19) |
(rq->cq_idx << 16) | (rq->cont_rbdr_qs << 9) |
(rq->cont_qs_rbdr_idx << 8) | (rq->start_rbdr_qs << 1) |
(rq->start_qs_rbdr_idx);
nicvf_send_msg_to_pf(nic, &mbx);
mbx.rq.msg = NIC_MBOX_MSG_RQ_BP_CFG;
mbx.rq.cfg = (1UL << 63) | (1UL << 62) | (qs->vnic_id << 0);
nicvf_send_msg_to_pf(nic, &mbx);
/*
* RQ drop config
* Enable CQ drop to reserve sufficient CQEs for all tx packets
*/
mbx.rq.msg = NIC_MBOX_MSG_RQ_DROP_CFG;
mbx.rq.cfg = (1UL << 62) | (RQ_CQ_DROP << 8);
nicvf_send_msg_to_pf(nic, &mbx);
nicvf_queue_reg_write(nic, NIC_QSET_RQ_GEN_CFG, 0, 0x00);
/* Enable Receive queue */
rq_cfg.ena = 1;
rq_cfg.tcp_ena = 0;
nicvf_queue_reg_write(nic, NIC_QSET_RQ_0_7_CFG, qidx,
*(uint64_t *)&rq_cfg);
}
/* Configures completion queue */
static void
nicvf_cmp_queue_config(struct nicvf *nic, struct queue_set *qs,
int qidx, boolean_t enable)
{
struct cmp_queue *cq;
struct cq_cfg cq_cfg;
cq = &qs->cq[qidx];
cq->enable = enable;
if (!cq->enable) {
nicvf_reclaim_cmp_queue(nic, qs, qidx);
return;
}
/* Reset completion queue */
nicvf_queue_reg_write(nic, NIC_QSET_CQ_0_7_CFG, qidx, NICVF_CQ_RESET);
/* Set completion queue base address */
nicvf_queue_reg_write(nic, NIC_QSET_CQ_0_7_BASE, qidx,
(uint64_t)(cq->dmem.phys_base));
/* Enable Completion queue */
cq_cfg.ena = 1;
cq_cfg.reset = 0;
cq_cfg.caching = 0;
cq_cfg.qsize = CMP_QSIZE;
cq_cfg.avg_con = 0;
nicvf_queue_reg_write(nic, NIC_QSET_CQ_0_7_CFG, qidx, *(uint64_t *)&cq_cfg);
/* Set threshold value for interrupt generation */
nicvf_queue_reg_write(nic, NIC_QSET_CQ_0_7_THRESH, qidx, cq->thresh);
nicvf_queue_reg_write(nic, NIC_QSET_CQ_0_7_CFG2, qidx,
nic->cq_coalesce_usecs);
}
/* Configures transmit queue */
static void
nicvf_snd_queue_config(struct nicvf *nic, struct queue_set *qs, int qidx,
boolean_t enable)
{
union nic_mbx mbx = {};
struct snd_queue *sq;
struct sq_cfg sq_cfg;
sq = &qs->sq[qidx];
sq->enable = enable;
if (!sq->enable) {
nicvf_reclaim_snd_queue(nic, qs, qidx);
return;
}
/* Reset send queue */
nicvf_queue_reg_write(nic, NIC_QSET_SQ_0_7_CFG, qidx, NICVF_SQ_RESET);
sq->cq_qs = qs->vnic_id;
sq->cq_idx = qidx;
/* Send a mailbox msg to PF to config SQ */
mbx.sq.msg = NIC_MBOX_MSG_SQ_CFG;
mbx.sq.qs_num = qs->vnic_id;
mbx.sq.sq_num = qidx;
mbx.sq.sqs_mode = nic->sqs_mode;
mbx.sq.cfg = (sq->cq_qs << 3) | sq->cq_idx;
nicvf_send_msg_to_pf(nic, &mbx);
/* Set queue base address */
nicvf_queue_reg_write(nic, NIC_QSET_SQ_0_7_BASE, qidx,
(uint64_t)(sq->dmem.phys_base));
/* Enable send queue & set queue size */
sq_cfg.ena = 1;
sq_cfg.reset = 0;
sq_cfg.ldwb = 0;
sq_cfg.qsize = SND_QSIZE;
sq_cfg.tstmp_bgx_intf = 0;
nicvf_queue_reg_write(nic, NIC_QSET_SQ_0_7_CFG, qidx, *(uint64_t *)&sq_cfg);
/* Set threshold value for interrupt generation */
nicvf_queue_reg_write(nic, NIC_QSET_SQ_0_7_THRESH, qidx, sq->thresh);
}
/* Configures receive buffer descriptor ring */
static void
nicvf_rbdr_config(struct nicvf *nic, struct queue_set *qs, int qidx,
boolean_t enable)
{
struct rbdr *rbdr;
struct rbdr_cfg rbdr_cfg;
rbdr = &qs->rbdr[qidx];
nicvf_reclaim_rbdr(nic, rbdr, qidx);
if (!enable)
return;
/* Set descriptor base address */
nicvf_queue_reg_write(nic, NIC_QSET_RBDR_0_1_BASE, qidx,
(uint64_t)(rbdr->dmem.phys_base));
/* Enable RBDR & set queue size */
/* Buffer size should be in multiples of 128 bytes */
rbdr_cfg.ena = 1;
rbdr_cfg.reset = 0;
rbdr_cfg.ldwb = 0;
rbdr_cfg.qsize = RBDR_SIZE;
rbdr_cfg.avg_con = 0;
rbdr_cfg.lines = rbdr->dma_size / 128;
nicvf_queue_reg_write(nic, NIC_QSET_RBDR_0_1_CFG, qidx,
*(uint64_t *)&rbdr_cfg);
/* Notify HW */
nicvf_queue_reg_write(nic, NIC_QSET_RBDR_0_1_DOOR, qidx,
qs->rbdr_len - 1);
/* Set threshold value for interrupt generation */
nicvf_queue_reg_write(nic, NIC_QSET_RBDR_0_1_THRESH, qidx,
rbdr->thresh - 1);
}
/* Requests PF to assign and enable Qset */
void
nicvf_qset_config(struct nicvf *nic, boolean_t enable)
{
union nic_mbx mbx = {};
struct queue_set *qs;
struct qs_cfg *qs_cfg;
qs = nic->qs;
if (qs == NULL) {
device_printf(nic->dev,
"Qset is still not allocated, don't init queues\n");
return;
}
qs->enable = enable;
qs->vnic_id = nic->vf_id;
/* Send a mailbox msg to PF to config Qset */
mbx.qs.msg = NIC_MBOX_MSG_QS_CFG;
mbx.qs.num = qs->vnic_id;
mbx.qs.cfg = 0;
qs_cfg = (struct qs_cfg *)&mbx.qs.cfg;
if (qs->enable) {
qs_cfg->ena = 1;
qs_cfg->vnic = qs->vnic_id;
}
nicvf_send_msg_to_pf(nic, &mbx);
}
static void
nicvf_free_resources(struct nicvf *nic)
{
int qidx;
struct queue_set *qs;
qs = nic->qs;
/*
* Remove QS error task first since it has to be dead
* to safely free completion queue tasks.
*/
if (qs->qs_err_taskq != NULL) {
/* Shut down QS error tasks */
while (taskqueue_cancel(qs->qs_err_taskq,
&qs->qs_err_task, NULL) != 0) {
taskqueue_drain(qs->qs_err_taskq, &qs->qs_err_task);
}
taskqueue_free(qs->qs_err_taskq);
qs->qs_err_taskq = NULL;
}
/* Free receive buffer descriptor ring */
for (qidx = 0; qidx < qs->rbdr_cnt; qidx++)
nicvf_free_rbdr(nic, &qs->rbdr[qidx]);
/* Free completion queue */
for (qidx = 0; qidx < qs->cq_cnt; qidx++)
nicvf_free_cmp_queue(nic, &qs->cq[qidx]);
/* Free send queue */
for (qidx = 0; qidx < qs->sq_cnt; qidx++)
nicvf_free_snd_queue(nic, &qs->sq[qidx]);
}
static int
nicvf_alloc_resources(struct nicvf *nic)
{
struct queue_set *qs = nic->qs;
int qidx;
/* Alloc receive buffer descriptor ring */
for (qidx = 0; qidx < qs->rbdr_cnt; qidx++) {
if (nicvf_init_rbdr(nic, &qs->rbdr[qidx], qs->rbdr_len,
DMA_BUFFER_LEN, qidx))
goto alloc_fail;
}
/* Alloc send queue */
for (qidx = 0; qidx < qs->sq_cnt; qidx++) {
if (nicvf_init_snd_queue(nic, &qs->sq[qidx], qs->sq_len, qidx))
goto alloc_fail;
}
/* Alloc completion queue */
for (qidx = 0; qidx < qs->cq_cnt; qidx++) {
if (nicvf_init_cmp_queue(nic, &qs->cq[qidx], qs->cq_len, qidx))
goto alloc_fail;
}
/* Allocate QS error taskqueue */
TASK_INIT(&qs->qs_err_task, 0, nicvf_qs_err_task, nic);
qs->qs_err_taskq = taskqueue_create_fast("nicvf_qs_err_taskq", M_WAITOK,
taskqueue_thread_enqueue, &qs->qs_err_taskq);
taskqueue_start_threads(&qs->qs_err_taskq, 1, PI_NET, "%s: qs_taskq",
device_get_nameunit(nic->dev));
return (0);
alloc_fail:
nicvf_free_resources(nic);
return (ENOMEM);
}
int
nicvf_set_qset_resources(struct nicvf *nic)
{
struct queue_set *qs;
qs = malloc(sizeof(*qs), M_NICVF, (M_ZERO | M_WAITOK));
nic->qs = qs;
/* Set count of each queue */
qs->rbdr_cnt = RBDR_CNT;
qs->rq_cnt = RCV_QUEUE_CNT;
qs->sq_cnt = SND_QUEUE_CNT;
qs->cq_cnt = CMP_QUEUE_CNT;
/* Set queue lengths */
qs->rbdr_len = RCV_BUF_COUNT;
qs->sq_len = SND_QUEUE_LEN;
qs->cq_len = CMP_QUEUE_LEN;
nic->rx_queues = qs->rq_cnt;
nic->tx_queues = qs->sq_cnt;
return (0);
}
int
nicvf_config_data_transfer(struct nicvf *nic, boolean_t enable)
{
boolean_t disable = FALSE;
struct queue_set *qs;
int qidx;
qs = nic->qs;
if (qs == NULL)
return (0);
if (enable) {
if (nicvf_alloc_resources(nic) != 0)
return (ENOMEM);
for (qidx = 0; qidx < qs->sq_cnt; qidx++)
nicvf_snd_queue_config(nic, qs, qidx, enable);
for (qidx = 0; qidx < qs->cq_cnt; qidx++)
nicvf_cmp_queue_config(nic, qs, qidx, enable);
for (qidx = 0; qidx < qs->rbdr_cnt; qidx++)
nicvf_rbdr_config(nic, qs, qidx, enable);
for (qidx = 0; qidx < qs->rq_cnt; qidx++)
nicvf_rcv_queue_config(nic, qs, qidx, enable);
} else {
for (qidx = 0; qidx < qs->rq_cnt; qidx++)
nicvf_rcv_queue_config(nic, qs, qidx, disable);
for (qidx = 0; qidx < qs->rbdr_cnt; qidx++)
nicvf_rbdr_config(nic, qs, qidx, disable);
for (qidx = 0; qidx < qs->sq_cnt; qidx++)
nicvf_snd_queue_config(nic, qs, qidx, disable);
for (qidx = 0; qidx < qs->cq_cnt; qidx++)
nicvf_cmp_queue_config(nic, qs, qidx, disable);
nicvf_free_resources(nic);
}
return (0);
}
/*
* Get a free desc from SQ
* returns descriptor ponter & descriptor number
*/
static __inline int
nicvf_get_sq_desc(struct snd_queue *sq, int desc_cnt)
{
int qentry;
qentry = sq->tail;
atomic_subtract_int(&sq->free_cnt, desc_cnt);
sq->tail += desc_cnt;
sq->tail &= (sq->dmem.q_len - 1);
return (qentry);
}
/* Free descriptor back to SQ for future use */
static void
nicvf_put_sq_desc(struct snd_queue *sq, int desc_cnt)
{
atomic_add_int(&sq->free_cnt, desc_cnt);
sq->head += desc_cnt;
sq->head &= (sq->dmem.q_len - 1);
}
static __inline int
nicvf_get_nxt_sqentry(struct snd_queue *sq, int qentry)
{
qentry++;
qentry &= (sq->dmem.q_len - 1);
return (qentry);
}
static void
nicvf_sq_enable(struct nicvf *nic, struct snd_queue *sq, int qidx)
{
uint64_t sq_cfg;
sq_cfg = nicvf_queue_reg_read(nic, NIC_QSET_SQ_0_7_CFG, qidx);
sq_cfg |= NICVF_SQ_EN;
nicvf_queue_reg_write(nic, NIC_QSET_SQ_0_7_CFG, qidx, sq_cfg);
/* Ring doorbell so that H/W restarts processing SQEs */
nicvf_queue_reg_write(nic, NIC_QSET_SQ_0_7_DOOR, qidx, 0);
}
static void
nicvf_sq_disable(struct nicvf *nic, int qidx)
{
uint64_t sq_cfg;
sq_cfg = nicvf_queue_reg_read(nic, NIC_QSET_SQ_0_7_CFG, qidx);
sq_cfg &= ~NICVF_SQ_EN;
nicvf_queue_reg_write(nic, NIC_QSET_SQ_0_7_CFG, qidx, sq_cfg);
}
static void
nicvf_sq_free_used_descs(struct nicvf *nic, struct snd_queue *sq, int qidx)
{
uint64_t head, tail;
struct snd_buff *snd_buff;
struct sq_hdr_subdesc *hdr;
NICVF_TX_LOCK(sq);
head = nicvf_queue_reg_read(nic, NIC_QSET_SQ_0_7_HEAD, qidx) >> 4;
tail = nicvf_queue_reg_read(nic, NIC_QSET_SQ_0_7_TAIL, qidx) >> 4;
while (sq->head != head) {
hdr = (struct sq_hdr_subdesc *)GET_SQ_DESC(sq, sq->head);
if (hdr->subdesc_type != SQ_DESC_TYPE_HEADER) {
nicvf_put_sq_desc(sq, 1);
continue;
}
snd_buff = &sq->snd_buff[sq->head];
if (snd_buff->mbuf != NULL) {
bus_dmamap_unload(sq->snd_buff_dmat, snd_buff->dmap);
m_freem(snd_buff->mbuf);
sq->snd_buff[sq->head].mbuf = NULL;
}
nicvf_put_sq_desc(sq, hdr->subdesc_cnt + 1);
}
NICVF_TX_UNLOCK(sq);
}
/*
* Add SQ HEADER subdescriptor.
* First subdescriptor for every send descriptor.
*/
static __inline int
nicvf_sq_add_hdr_subdesc(struct snd_queue *sq, int qentry,
int subdesc_cnt, struct mbuf *mbuf, int len)
{
struct nicvf *nic;
struct sq_hdr_subdesc *hdr;
struct ether_vlan_header *eh;
#ifdef INET
struct ip *ip;
struct tcphdr *th;
#endif
uint16_t etype;
int ehdrlen, iphlen, poff;
nic = sq->nic;
hdr = (struct sq_hdr_subdesc *)GET_SQ_DESC(sq, qentry);
sq->snd_buff[qentry].mbuf = mbuf;
memset(hdr, 0, SND_QUEUE_DESC_SIZE);
hdr->subdesc_type = SQ_DESC_TYPE_HEADER;
/* Enable notification via CQE after processing SQE */
hdr->post_cqe = 1;
/* No of subdescriptors following this */
hdr->subdesc_cnt = subdesc_cnt;
hdr->tot_len = len;
eh = mtod(mbuf, struct ether_vlan_header *);
if (eh->evl_encap_proto == htons(ETHERTYPE_VLAN)) {
ehdrlen = ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN;
etype = ntohs(eh->evl_proto);
} else {
ehdrlen = ETHER_HDR_LEN;
etype = ntohs(eh->evl_encap_proto);
}
switch (etype) {
#ifdef INET6
case ETHERTYPE_IPV6:
/* ARM64TODO: Add support for IPv6 */
hdr->csum_l3 = 0;
sq->snd_buff[qentry].mbuf = NULL;
return (ENXIO);
#endif
#ifdef INET
case ETHERTYPE_IP:
if (mbuf->m_len < ehdrlen + sizeof(struct ip)) {
mbuf = m_pullup(mbuf, ehdrlen + sizeof(struct ip));
sq->snd_buff[qentry].mbuf = mbuf;
if (mbuf == NULL)
return (ENOBUFS);
}
ip = (struct ip *)(mbuf->m_data + ehdrlen);
iphlen = ip->ip_hl << 2;
poff = ehdrlen + iphlen;
if (mbuf->m_pkthdr.csum_flags != 0) {
hdr->csum_l3 = 1; /* Enable IP csum calculation */
switch (ip->ip_p) {
case IPPROTO_TCP:
if ((mbuf->m_pkthdr.csum_flags & CSUM_TCP) == 0)
break;
if (mbuf->m_len < (poff + sizeof(struct tcphdr))) {
mbuf = m_pullup(mbuf, poff + sizeof(struct tcphdr));
sq->snd_buff[qentry].mbuf = mbuf;
if (mbuf == NULL)
return (ENOBUFS);
}
hdr->csum_l4 = SEND_L4_CSUM_TCP;
break;
case IPPROTO_UDP:
if ((mbuf->m_pkthdr.csum_flags & CSUM_UDP) == 0)
break;
if (mbuf->m_len < (poff + sizeof(struct udphdr))) {
mbuf = m_pullup(mbuf, poff + sizeof(struct udphdr));
sq->snd_buff[qentry].mbuf = mbuf;
if (mbuf == NULL)
return (ENOBUFS);
}
hdr->csum_l4 = SEND_L4_CSUM_UDP;
break;
case IPPROTO_SCTP:
if ((mbuf->m_pkthdr.csum_flags & CSUM_SCTP) == 0)
break;
if (mbuf->m_len < (poff + sizeof(struct sctphdr))) {
mbuf = m_pullup(mbuf, poff + sizeof(struct sctphdr));
sq->snd_buff[qentry].mbuf = mbuf;
if (mbuf == NULL)
return (ENOBUFS);
}
hdr->csum_l4 = SEND_L4_CSUM_SCTP;
break;
default:
break;
}
hdr->l3_offset = ehdrlen;
hdr->l4_offset = ehdrlen + iphlen;
}
if ((mbuf->m_pkthdr.tso_segsz != 0) && nic->hw_tso) {
/*
* Extract ip again as m_data could have been modified.
*/
ip = (struct ip *)(mbuf->m_data + ehdrlen);
th = (struct tcphdr *)((caddr_t)ip + iphlen);
hdr->tso = 1;
hdr->tso_start = ehdrlen + iphlen + (th->th_off * 4);
hdr->tso_max_paysize = mbuf->m_pkthdr.tso_segsz;
hdr->inner_l3_offset = ehdrlen - 2;
nic->drv_stats.tx_tso++;
}
break;
#endif
default:
hdr->csum_l3 = 0;
}
return (0);
}
/*
* SQ GATHER subdescriptor
* Must follow HDR descriptor
*/
static inline void nicvf_sq_add_gather_subdesc(struct snd_queue *sq, int qentry,
int size, uint64_t data)
{
struct sq_gather_subdesc *gather;
qentry &= (sq->dmem.q_len - 1);
gather = (struct sq_gather_subdesc *)GET_SQ_DESC(sq, qentry);
memset(gather, 0, SND_QUEUE_DESC_SIZE);
gather->subdesc_type = SQ_DESC_TYPE_GATHER;
gather->ld_type = NIC_SEND_LD_TYPE_E_LDD;
gather->size = size;
gather->addr = data;
}
/* Put an mbuf to a SQ for packet transfer. */
static int
nicvf_tx_mbuf_locked(struct snd_queue *sq, struct mbuf **mbufp)
{
bus_dma_segment_t segs[256];
struct snd_buff *snd_buff;
size_t seg;
int nsegs, qentry;
int subdesc_cnt;
int err;
NICVF_TX_LOCK_ASSERT(sq);
if (sq->free_cnt == 0)
return (ENOBUFS);
snd_buff = &sq->snd_buff[sq->tail];
err = bus_dmamap_load_mbuf_sg(sq->snd_buff_dmat, snd_buff->dmap,
*mbufp, segs, &nsegs, BUS_DMA_NOWAIT);
if (__predict_false(err != 0)) {
/* ARM64TODO: Add mbuf defragmenting if we lack maps */
m_freem(*mbufp);
*mbufp = NULL;
return (err);
}
/* Set how many subdescriptors is required */
subdesc_cnt = MIN_SQ_DESC_PER_PKT_XMIT + nsegs - 1;
if (subdesc_cnt > sq->free_cnt) {
/* ARM64TODO: Add mbuf defragmentation if we lack descriptors */
bus_dmamap_unload(sq->snd_buff_dmat, snd_buff->dmap);
return (ENOBUFS);
}
qentry = nicvf_get_sq_desc(sq, subdesc_cnt);
/* Add SQ header subdesc */
err = nicvf_sq_add_hdr_subdesc(sq, qentry, subdesc_cnt - 1, *mbufp,
(*mbufp)->m_pkthdr.len);
if (err != 0) {
nicvf_put_sq_desc(sq, subdesc_cnt);
bus_dmamap_unload(sq->snd_buff_dmat, snd_buff->dmap);
if (err == ENOBUFS) {
m_freem(*mbufp);
*mbufp = NULL;
}
return (err);
}
/* Add SQ gather subdescs */
for (seg = 0; seg < nsegs; seg++) {
qentry = nicvf_get_nxt_sqentry(sq, qentry);
nicvf_sq_add_gather_subdesc(sq, qentry, segs[seg].ds_len,
segs[seg].ds_addr);
}
/* make sure all memory stores are done before ringing doorbell */
bus_dmamap_sync(sq->dmem.dmat, sq->dmem.dmap, BUS_DMASYNC_PREWRITE);
dprintf(sq->nic->dev, "%s: sq->idx: %d, subdesc_cnt: %d\n",
__func__, sq->idx, subdesc_cnt);
/* Inform HW to xmit new packet */
nicvf_queue_reg_write(sq->nic, NIC_QSET_SQ_0_7_DOOR,
sq->idx, subdesc_cnt);
return (0);
}
static __inline u_int
frag_num(u_int i)
{
#if BYTE_ORDER == BIG_ENDIAN
return ((i & ~3) + 3 - (i & 3));
#else
return (i);
#endif
}
/* Returns MBUF for a received packet */
struct mbuf *
nicvf_get_rcv_mbuf(struct nicvf *nic, struct cqe_rx_t *cqe_rx)
{
int frag;
int payload_len = 0;
struct mbuf *mbuf;
struct mbuf *mbuf_frag;
uint16_t *rb_lens = NULL;
uint64_t *rb_ptrs = NULL;
mbuf = NULL;
rb_lens = (uint16_t *)((uint8_t *)cqe_rx + (3 * sizeof(uint64_t)));
rb_ptrs = (uint64_t *)((uint8_t *)cqe_rx + (6 * sizeof(uint64_t)));
dprintf(nic->dev, "%s rb_cnt %d rb0_ptr %lx rb0_sz %d\n",
__func__, cqe_rx->rb_cnt, cqe_rx->rb0_ptr, cqe_rx->rb0_sz);
for (frag = 0; frag < cqe_rx->rb_cnt; frag++) {
payload_len = rb_lens[frag_num(frag)];
if (frag == 0) {
/* First fragment */
mbuf = nicvf_rb_ptr_to_mbuf(nic,
(*rb_ptrs - cqe_rx->align_pad));
mbuf->m_len = payload_len;
mbuf->m_data += cqe_rx->align_pad;
if_setrcvif(mbuf, nic->ifp);
} else {
/* Add fragments */
mbuf_frag = nicvf_rb_ptr_to_mbuf(nic, *rb_ptrs);
m_append(mbuf, payload_len, mbuf_frag->m_data);
m_freem(mbuf_frag);
}
/* Next buffer pointer */
rb_ptrs++;
}
if (__predict_true(mbuf != NULL)) {
m_fixhdr(mbuf);
mbuf->m_pkthdr.flowid = cqe_rx->rq_idx;
M_HASHTYPE_SET(mbuf, M_HASHTYPE_OPAQUE);
if (__predict_true((if_getcapenable(nic->ifp) & IFCAP_RXCSUM) != 0)) {
/*
* HW by default verifies IP & TCP/UDP/SCTP checksums
*/
if (__predict_true(cqe_rx->l3_type == L3TYPE_IPV4)) {
mbuf->m_pkthdr.csum_flags =
(CSUM_IP_CHECKED | CSUM_IP_VALID);
}
switch (cqe_rx->l4_type) {
case L4TYPE_UDP:
case L4TYPE_TCP: /* fall through */
mbuf->m_pkthdr.csum_flags |=
(CSUM_DATA_VALID | CSUM_PSEUDO_HDR);
mbuf->m_pkthdr.csum_data = 0xffff;
break;
case L4TYPE_SCTP:
mbuf->m_pkthdr.csum_flags |= CSUM_SCTP_VALID;
break;
default:
break;
}
}
}
return (mbuf);
}
/* Enable interrupt */
void
nicvf_enable_intr(struct nicvf *nic, int int_type, int q_idx)
{
uint64_t reg_val;
reg_val = nicvf_reg_read(nic, NIC_VF_ENA_W1S);
switch (int_type) {
case NICVF_INTR_CQ:
reg_val |= ((1UL << q_idx) << NICVF_INTR_CQ_SHIFT);
break;
case NICVF_INTR_SQ:
reg_val |= ((1UL << q_idx) << NICVF_INTR_SQ_SHIFT);
break;
case NICVF_INTR_RBDR:
reg_val |= ((1UL << q_idx) << NICVF_INTR_RBDR_SHIFT);
break;
case NICVF_INTR_PKT_DROP:
reg_val |= (1UL << NICVF_INTR_PKT_DROP_SHIFT);
break;
case NICVF_INTR_TCP_TIMER:
reg_val |= (1UL << NICVF_INTR_TCP_TIMER_SHIFT);
break;
case NICVF_INTR_MBOX:
reg_val |= (1UL << NICVF_INTR_MBOX_SHIFT);
break;
case NICVF_INTR_QS_ERR:
reg_val |= (1UL << NICVF_INTR_QS_ERR_SHIFT);
break;
default:
device_printf(nic->dev,
"Failed to enable interrupt: unknown type\n");
break;
}
nicvf_reg_write(nic, NIC_VF_ENA_W1S, reg_val);
}
/* Disable interrupt */
void
nicvf_disable_intr(struct nicvf *nic, int int_type, int q_idx)
{
uint64_t reg_val = 0;
switch (int_type) {
case NICVF_INTR_CQ:
reg_val |= ((1UL << q_idx) << NICVF_INTR_CQ_SHIFT);
break;
case NICVF_INTR_SQ:
reg_val |= ((1UL << q_idx) << NICVF_INTR_SQ_SHIFT);
break;
case NICVF_INTR_RBDR:
reg_val |= ((1UL << q_idx) << NICVF_INTR_RBDR_SHIFT);
break;
case NICVF_INTR_PKT_DROP:
reg_val |= (1UL << NICVF_INTR_PKT_DROP_SHIFT);
break;
case NICVF_INTR_TCP_TIMER:
reg_val |= (1UL << NICVF_INTR_TCP_TIMER_SHIFT);
break;
case NICVF_INTR_MBOX:
reg_val |= (1UL << NICVF_INTR_MBOX_SHIFT);
break;
case NICVF_INTR_QS_ERR:
reg_val |= (1UL << NICVF_INTR_QS_ERR_SHIFT);
break;
default:
device_printf(nic->dev,
"Failed to disable interrupt: unknown type\n");
break;
}
nicvf_reg_write(nic, NIC_VF_ENA_W1C, reg_val);
}
/* Clear interrupt */
void
nicvf_clear_intr(struct nicvf *nic, int int_type, int q_idx)
{
uint64_t reg_val = 0;
switch (int_type) {
case NICVF_INTR_CQ:
reg_val = ((1UL << q_idx) << NICVF_INTR_CQ_SHIFT);
break;
case NICVF_INTR_SQ:
reg_val = ((1UL << q_idx) << NICVF_INTR_SQ_SHIFT);
break;
case NICVF_INTR_RBDR:
reg_val = ((1UL << q_idx) << NICVF_INTR_RBDR_SHIFT);
break;
case NICVF_INTR_PKT_DROP:
reg_val = (1UL << NICVF_INTR_PKT_DROP_SHIFT);
break;
case NICVF_INTR_TCP_TIMER:
reg_val = (1UL << NICVF_INTR_TCP_TIMER_SHIFT);
break;
case NICVF_INTR_MBOX:
reg_val = (1UL << NICVF_INTR_MBOX_SHIFT);
break;
case NICVF_INTR_QS_ERR:
reg_val |= (1UL << NICVF_INTR_QS_ERR_SHIFT);
break;
default:
device_printf(nic->dev,
"Failed to clear interrupt: unknown type\n");
break;
}
nicvf_reg_write(nic, NIC_VF_INT, reg_val);
}
/* Check if interrupt is enabled */
int
nicvf_is_intr_enabled(struct nicvf *nic, int int_type, int q_idx)
{
uint64_t reg_val;
uint64_t mask = 0xff;
reg_val = nicvf_reg_read(nic, NIC_VF_ENA_W1S);
switch (int_type) {
case NICVF_INTR_CQ:
mask = ((1UL << q_idx) << NICVF_INTR_CQ_SHIFT);
break;
case NICVF_INTR_SQ:
mask = ((1UL << q_idx) << NICVF_INTR_SQ_SHIFT);
break;
case NICVF_INTR_RBDR:
mask = ((1UL << q_idx) << NICVF_INTR_RBDR_SHIFT);
break;
case NICVF_INTR_PKT_DROP:
mask = NICVF_INTR_PKT_DROP_MASK;
break;
case NICVF_INTR_TCP_TIMER:
mask = NICVF_INTR_TCP_TIMER_MASK;
break;
case NICVF_INTR_MBOX:
mask = NICVF_INTR_MBOX_MASK;
break;
case NICVF_INTR_QS_ERR:
mask = NICVF_INTR_QS_ERR_MASK;
break;
default:
device_printf(nic->dev,
"Failed to check interrupt enable: unknown type\n");
break;
}
return (reg_val & mask);
}
void
nicvf_update_rq_stats(struct nicvf *nic, int rq_idx)
{
struct rcv_queue *rq;
#define GET_RQ_STATS(reg) \
nicvf_reg_read(nic, NIC_QSET_RQ_0_7_STAT_0_1 |\
(rq_idx << NIC_Q_NUM_SHIFT) | (reg << 3))
rq = &nic->qs->rq[rq_idx];
rq->stats.bytes = GET_RQ_STATS(RQ_SQ_STATS_OCTS);
rq->stats.pkts = GET_RQ_STATS(RQ_SQ_STATS_PKTS);
}
void
nicvf_update_sq_stats(struct nicvf *nic, int sq_idx)
{
struct snd_queue *sq;
#define GET_SQ_STATS(reg) \
nicvf_reg_read(nic, NIC_QSET_SQ_0_7_STAT_0_1 |\
(sq_idx << NIC_Q_NUM_SHIFT) | (reg << 3))
sq = &nic->qs->sq[sq_idx];
sq->stats.bytes = GET_SQ_STATS(RQ_SQ_STATS_OCTS);
sq->stats.pkts = GET_SQ_STATS(RQ_SQ_STATS_PKTS);
}
/* Check for errors in the receive cmp.queue entry */
int
nicvf_check_cqe_rx_errs(struct nicvf *nic, struct cmp_queue *cq,
struct cqe_rx_t *cqe_rx)
{
struct nicvf_hw_stats *stats = &nic->hw_stats;
struct nicvf_drv_stats *drv_stats = &nic->drv_stats;
if (!cqe_rx->err_level && !cqe_rx->err_opcode) {
drv_stats->rx_frames_ok++;
return (0);
}
switch (cqe_rx->err_opcode) {
case CQ_RX_ERROP_RE_PARTIAL:
stats->rx_bgx_truncated_pkts++;
break;
case CQ_RX_ERROP_RE_JABBER:
stats->rx_jabber_errs++;
break;
case CQ_RX_ERROP_RE_FCS:
stats->rx_fcs_errs++;
break;
case CQ_RX_ERROP_RE_RX_CTL:
stats->rx_bgx_errs++;
break;
case CQ_RX_ERROP_PREL2_ERR:
stats->rx_prel2_errs++;
break;
case CQ_RX_ERROP_L2_MAL:
stats->rx_l2_hdr_malformed++;
break;
case CQ_RX_ERROP_L2_OVERSIZE:
stats->rx_oversize++;
break;
case CQ_RX_ERROP_L2_UNDERSIZE:
stats->rx_undersize++;
break;
case CQ_RX_ERROP_L2_LENMISM:
stats->rx_l2_len_mismatch++;
break;
case CQ_RX_ERROP_L2_PCLP:
stats->rx_l2_pclp++;
break;
case CQ_RX_ERROP_IP_NOT:
stats->rx_ip_ver_errs++;
break;
case CQ_RX_ERROP_IP_CSUM_ERR:
stats->rx_ip_csum_errs++;
break;
case CQ_RX_ERROP_IP_MAL:
stats->rx_ip_hdr_malformed++;
break;
case CQ_RX_ERROP_IP_MALD:
stats->rx_ip_payload_malformed++;
break;
case CQ_RX_ERROP_IP_HOP:
stats->rx_ip_ttl_errs++;
break;
case CQ_RX_ERROP_L3_PCLP:
stats->rx_l3_pclp++;
break;
case CQ_RX_ERROP_L4_MAL:
stats->rx_l4_malformed++;
break;
case CQ_RX_ERROP_L4_CHK:
stats->rx_l4_csum_errs++;
break;
case CQ_RX_ERROP_UDP_LEN:
stats->rx_udp_len_errs++;
break;
case CQ_RX_ERROP_L4_PORT:
stats->rx_l4_port_errs++;
break;
case CQ_RX_ERROP_TCP_FLAG:
stats->rx_tcp_flag_errs++;
break;
case CQ_RX_ERROP_TCP_OFFSET:
stats->rx_tcp_offset_errs++;
break;
case CQ_RX_ERROP_L4_PCLP:
stats->rx_l4_pclp++;
break;
case CQ_RX_ERROP_RBDR_TRUNC:
stats->rx_truncated_pkts++;
break;
}
return (1);
}
/* Check for errors in the send cmp.queue entry */
int
nicvf_check_cqe_tx_errs(struct nicvf *nic, struct cmp_queue *cq,
struct cqe_send_t *cqe_tx)
{
struct cmp_queue_stats *stats = &cq->stats;
switch (cqe_tx->send_status) {
case CQ_TX_ERROP_GOOD:
stats->tx.good++;
return (0);
case CQ_TX_ERROP_DESC_FAULT:
stats->tx.desc_fault++;
break;
case CQ_TX_ERROP_HDR_CONS_ERR:
stats->tx.hdr_cons_err++;
break;
case CQ_TX_ERROP_SUBDC_ERR:
stats->tx.subdesc_err++;
break;
case CQ_TX_ERROP_IMM_SIZE_OFLOW:
stats->tx.imm_size_oflow++;
break;
case CQ_TX_ERROP_DATA_SEQUENCE_ERR:
stats->tx.data_seq_err++;
break;
case CQ_TX_ERROP_MEM_SEQUENCE_ERR:
stats->tx.mem_seq_err++;
break;
case CQ_TX_ERROP_LOCK_VIOL:
stats->tx.lock_viol++;
break;
case CQ_TX_ERROP_DATA_FAULT:
stats->tx.data_fault++;
break;
case CQ_TX_ERROP_TSTMP_CONFLICT:
stats->tx.tstmp_conflict++;
break;
case CQ_TX_ERROP_TSTMP_TIMEOUT:
stats->tx.tstmp_timeout++;
break;
case CQ_TX_ERROP_MEM_FAULT:
stats->tx.mem_fault++;
break;
case CQ_TX_ERROP_CK_OVERLAP:
stats->tx.csum_overlap++;
break;
case CQ_TX_ERROP_CK_OFLOW:
stats->tx.csum_overflow++;
break;
}
return (1);
}
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