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M7350/kernel/drivers/infiniband/hw/nes/nes_mgt.c
T f9cc65cfda M7350v1_en_gpl
2024-09-09 08:52:07 +00:00

1163 lines
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/*
* Copyright (c) 2006 - 2011 Intel-NE, Inc. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - 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.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#include <linux/skbuff.h>
#include <linux/etherdevice.h>
#include <linux/kthread.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <net/tcp.h>
#include "nes.h"
#include "nes_mgt.h"
atomic_t pau_qps_created;
atomic_t pau_qps_destroyed;
static void nes_replenish_mgt_rq(struct nes_vnic_mgt *mgtvnic)
{
unsigned long flags;
dma_addr_t bus_address;
struct sk_buff *skb;
struct nes_hw_nic_rq_wqe *nic_rqe;
struct nes_hw_mgt *nesmgt;
struct nes_device *nesdev;
struct nes_rskb_cb *cb;
u32 rx_wqes_posted = 0;
nesmgt = &mgtvnic->mgt;
nesdev = mgtvnic->nesvnic->nesdev;
spin_lock_irqsave(&nesmgt->rq_lock, flags);
if (nesmgt->replenishing_rq != 0) {
if (((nesmgt->rq_size - 1) == atomic_read(&mgtvnic->rx_skbs_needed)) &&
(atomic_read(&mgtvnic->rx_skb_timer_running) == 0)) {
atomic_set(&mgtvnic->rx_skb_timer_running, 1);
spin_unlock_irqrestore(&nesmgt->rq_lock, flags);
mgtvnic->rq_wqes_timer.expires = jiffies + (HZ / 2); /* 1/2 second */
add_timer(&mgtvnic->rq_wqes_timer);
} else {
spin_unlock_irqrestore(&nesmgt->rq_lock, flags);
}
return;
}
nesmgt->replenishing_rq = 1;
spin_unlock_irqrestore(&nesmgt->rq_lock, flags);
do {
skb = dev_alloc_skb(mgtvnic->nesvnic->max_frame_size);
if (skb) {
skb->dev = mgtvnic->nesvnic->netdev;
bus_address = pci_map_single(nesdev->pcidev,
skb->data, mgtvnic->nesvnic->max_frame_size, PCI_DMA_FROMDEVICE);
cb = (struct nes_rskb_cb *)&skb->cb[0];
cb->busaddr = bus_address;
cb->maplen = mgtvnic->nesvnic->max_frame_size;
nic_rqe = &nesmgt->rq_vbase[mgtvnic->mgt.rq_head];
nic_rqe->wqe_words[NES_NIC_RQ_WQE_LENGTH_1_0_IDX] =
cpu_to_le32(mgtvnic->nesvnic->max_frame_size);
nic_rqe->wqe_words[NES_NIC_RQ_WQE_LENGTH_3_2_IDX] = 0;
nic_rqe->wqe_words[NES_NIC_RQ_WQE_FRAG0_LOW_IDX] =
cpu_to_le32((u32)bus_address);
nic_rqe->wqe_words[NES_NIC_RQ_WQE_FRAG0_HIGH_IDX] =
cpu_to_le32((u32)((u64)bus_address >> 32));
nesmgt->rx_skb[nesmgt->rq_head] = skb;
nesmgt->rq_head++;
nesmgt->rq_head &= nesmgt->rq_size - 1;
atomic_dec(&mgtvnic->rx_skbs_needed);
barrier();
if (++rx_wqes_posted == 255) {
nes_write32(nesdev->regs + NES_WQE_ALLOC, (rx_wqes_posted << 24) | nesmgt->qp_id);
rx_wqes_posted = 0;
}
} else {
spin_lock_irqsave(&nesmgt->rq_lock, flags);
if (((nesmgt->rq_size - 1) == atomic_read(&mgtvnic->rx_skbs_needed)) &&
(atomic_read(&mgtvnic->rx_skb_timer_running) == 0)) {
atomic_set(&mgtvnic->rx_skb_timer_running, 1);
spin_unlock_irqrestore(&nesmgt->rq_lock, flags);
mgtvnic->rq_wqes_timer.expires = jiffies + (HZ / 2); /* 1/2 second */
add_timer(&mgtvnic->rq_wqes_timer);
} else {
spin_unlock_irqrestore(&nesmgt->rq_lock, flags);
}
break;
}
} while (atomic_read(&mgtvnic->rx_skbs_needed));
barrier();
if (rx_wqes_posted)
nes_write32(nesdev->regs + NES_WQE_ALLOC, (rx_wqes_posted << 24) | nesmgt->qp_id);
nesmgt->replenishing_rq = 0;
}
/**
* nes_mgt_rq_wqes_timeout
*/
static void nes_mgt_rq_wqes_timeout(unsigned long parm)
{
struct nes_vnic_mgt *mgtvnic = (struct nes_vnic_mgt *)parm;
atomic_set(&mgtvnic->rx_skb_timer_running, 0);
if (atomic_read(&mgtvnic->rx_skbs_needed))
nes_replenish_mgt_rq(mgtvnic);
}
/**
* nes_mgt_free_skb - unmap and free skb
*/
static void nes_mgt_free_skb(struct nes_device *nesdev, struct sk_buff *skb, u32 dir)
{
struct nes_rskb_cb *cb;
cb = (struct nes_rskb_cb *)&skb->cb[0];
pci_unmap_single(nesdev->pcidev, cb->busaddr, cb->maplen, dir);
cb->busaddr = 0;
dev_kfree_skb_any(skb);
}
/**
* nes_download_callback - handle download completions
*/
static void nes_download_callback(struct nes_device *nesdev, struct nes_cqp_request *cqp_request)
{
struct pau_fpdu_info *fpdu_info = cqp_request->cqp_callback_pointer;
struct nes_qp *nesqp = fpdu_info->nesqp;
struct sk_buff *skb;
int i;
for (i = 0; i < fpdu_info->frag_cnt; i++) {
skb = fpdu_info->frags[i].skb;
if (fpdu_info->frags[i].cmplt) {
nes_mgt_free_skb(nesdev, skb, PCI_DMA_TODEVICE);
nes_rem_ref_cm_node(nesqp->cm_node);
}
}
if (fpdu_info->hdr_vbase)
pci_free_consistent(nesdev->pcidev, fpdu_info->hdr_len,
fpdu_info->hdr_vbase, fpdu_info->hdr_pbase);
kfree(fpdu_info);
}
/**
* nes_get_seq - Get the seq, ack_seq and window from the packet
*/
static u32 nes_get_seq(struct sk_buff *skb, u32 *ack, u16 *wnd, u32 *fin_rcvd, u32 *rst_rcvd)
{
struct nes_rskb_cb *cb = (struct nes_rskb_cb *)&skb->cb[0];
struct iphdr *iph = (struct iphdr *)(cb->data_start + ETH_HLEN);
struct tcphdr *tcph = (struct tcphdr *)(((char *)iph) + (4 * iph->ihl));
*ack = be32_to_cpu(tcph->ack_seq);
*wnd = be16_to_cpu(tcph->window);
*fin_rcvd = tcph->fin;
*rst_rcvd = tcph->rst;
return be32_to_cpu(tcph->seq);
}
/**
* nes_get_next_skb - Get the next skb based on where current skb is in the queue
*/
static struct sk_buff *nes_get_next_skb(struct nes_device *nesdev, struct nes_qp *nesqp,
struct sk_buff *skb, u32 nextseq, u32 *ack,
u16 *wnd, u32 *fin_rcvd, u32 *rst_rcvd)
{
u32 seq;
bool processacks;
struct sk_buff *old_skb;
if (skb) {
/* Continue processing fpdu */
if (skb->next == (struct sk_buff *)&nesqp->pau_list)
goto out;
skb = skb->next;
processacks = false;
} else {
/* Starting a new one */
if (skb_queue_empty(&nesqp->pau_list))
goto out;
skb = skb_peek(&nesqp->pau_list);
processacks = true;
}
while (1) {
seq = nes_get_seq(skb, ack, wnd, fin_rcvd, rst_rcvd);
if (seq == nextseq) {
if (skb->len || processacks)
break;
} else if (after(seq, nextseq)) {
goto out;
}
if (skb->next == (struct sk_buff *)&nesqp->pau_list)
goto out;
old_skb = skb;
skb = skb->next;
skb_unlink(old_skb, &nesqp->pau_list);
nes_mgt_free_skb(nesdev, old_skb, PCI_DMA_TODEVICE);
nes_rem_ref_cm_node(nesqp->cm_node);
}
return skb;
out:
return NULL;
}
/**
* get_fpdu_info - Find the next complete fpdu and return its fragments.
*/
static int get_fpdu_info(struct nes_device *nesdev, struct nes_qp *nesqp,
struct pau_fpdu_info **pau_fpdu_info)
{
struct sk_buff *skb;
struct iphdr *iph;
struct tcphdr *tcph;
struct nes_rskb_cb *cb;
struct pau_fpdu_info *fpdu_info = NULL;
struct pau_fpdu_frag frags[MAX_FPDU_FRAGS];
unsigned long flags;
u32 fpdu_len = 0;
u32 tmp_len;
int frag_cnt = 0;
u32 tot_len;
u32 frag_tot;
u32 ack;
u32 fin_rcvd;
u32 rst_rcvd;
u16 wnd;
int i;
int rc = 0;
*pau_fpdu_info = NULL;
spin_lock_irqsave(&nesqp->pau_lock, flags);
skb = nes_get_next_skb(nesdev, nesqp, NULL, nesqp->pau_rcv_nxt, &ack, &wnd, &fin_rcvd, &rst_rcvd);
if (!skb) {
spin_unlock_irqrestore(&nesqp->pau_lock, flags);
goto out;
}
cb = (struct nes_rskb_cb *)&skb->cb[0];
if (skb->len) {
fpdu_len = be16_to_cpu(*(__be16 *) skb->data) + MPA_FRAMING;
fpdu_len = (fpdu_len + 3) & 0xfffffffc;
tmp_len = fpdu_len;
/* See if we have all of the fpdu */
frag_tot = 0;
memset(&frags, 0, sizeof frags);
for (i = 0; i < MAX_FPDU_FRAGS; i++) {
frags[i].physaddr = cb->busaddr;
frags[i].physaddr += skb->data - cb->data_start;
frags[i].frag_len = min(tmp_len, skb->len);
frags[i].skb = skb;
frags[i].cmplt = (skb->len == frags[i].frag_len);
frag_tot += frags[i].frag_len;
frag_cnt++;
tmp_len -= frags[i].frag_len;
if (tmp_len == 0)
break;
skb = nes_get_next_skb(nesdev, nesqp, skb,
nesqp->pau_rcv_nxt + frag_tot, &ack, &wnd, &fin_rcvd, &rst_rcvd);
if (!skb) {
spin_unlock_irqrestore(&nesqp->pau_lock, flags);
goto out;
} else if (rst_rcvd) {
/* rst received in the middle of fpdu */
for (; i >= 0; i--) {
skb_unlink(frags[i].skb, &nesqp->pau_list);
nes_mgt_free_skb(nesdev, frags[i].skb, PCI_DMA_TODEVICE);
}
cb = (struct nes_rskb_cb *)&skb->cb[0];
frags[0].physaddr = cb->busaddr;
frags[0].physaddr += skb->data - cb->data_start;
frags[0].frag_len = skb->len;
frags[0].skb = skb;
frags[0].cmplt = true;
frag_cnt = 1;
break;
}
cb = (struct nes_rskb_cb *)&skb->cb[0];
}
} else {
/* no data */
frags[0].physaddr = cb->busaddr;
frags[0].frag_len = 0;
frags[0].skb = skb;
frags[0].cmplt = true;
frag_cnt = 1;
}
spin_unlock_irqrestore(&nesqp->pau_lock, flags);
/* Found one */
fpdu_info = kzalloc(sizeof(*fpdu_info), GFP_ATOMIC);
if (fpdu_info == NULL) {
nes_debug(NES_DBG_PAU, "Failed to alloc a fpdu_info.\n");
rc = -ENOMEM;
goto out;
}
fpdu_info->cqp_request = nes_get_cqp_request(nesdev);
if (fpdu_info->cqp_request == NULL) {
nes_debug(NES_DBG_PAU, "Failed to get a cqp_request.\n");
rc = -ENOMEM;
goto out;
}
cb = (struct nes_rskb_cb *)&frags[0].skb->cb[0];
iph = (struct iphdr *)(cb->data_start + ETH_HLEN);
tcph = (struct tcphdr *)(((char *)iph) + (4 * iph->ihl));
fpdu_info->hdr_len = (((unsigned char *)tcph) + 4 * (tcph->doff)) - cb->data_start;
fpdu_info->data_len = fpdu_len;
tot_len = fpdu_info->hdr_len + fpdu_len - ETH_HLEN;
if (frags[0].cmplt) {
fpdu_info->hdr_pbase = cb->busaddr;
fpdu_info->hdr_vbase = NULL;
} else {
fpdu_info->hdr_vbase = pci_alloc_consistent(nesdev->pcidev,
fpdu_info->hdr_len, &fpdu_info->hdr_pbase);
if (!fpdu_info->hdr_vbase) {
nes_debug(NES_DBG_PAU, "Unable to allocate memory for pau first frag\n");
rc = -ENOMEM;
goto out;
}
/* Copy hdrs, adjusting len and seqnum */
memcpy(fpdu_info->hdr_vbase, cb->data_start, fpdu_info->hdr_len);
iph = (struct iphdr *)(fpdu_info->hdr_vbase + ETH_HLEN);
tcph = (struct tcphdr *)(((char *)iph) + (4 * iph->ihl));
}
iph->tot_len = cpu_to_be16(tot_len);
iph->saddr = cpu_to_be32(0x7f000001);
tcph->seq = cpu_to_be32(nesqp->pau_rcv_nxt);
tcph->ack_seq = cpu_to_be32(ack);
tcph->window = cpu_to_be16(wnd);
nesqp->pau_rcv_nxt += fpdu_len + fin_rcvd;
memcpy(fpdu_info->frags, frags, sizeof(fpdu_info->frags));
fpdu_info->frag_cnt = frag_cnt;
fpdu_info->nesqp = nesqp;
*pau_fpdu_info = fpdu_info;
/* Update skb's for next pass */
for (i = 0; i < frag_cnt; i++) {
cb = (struct nes_rskb_cb *)&frags[i].skb->cb[0];
skb_pull(frags[i].skb, frags[i].frag_len);
if (frags[i].skb->len == 0) {
/* Pull skb off the list - it will be freed in the callback */
spin_lock_irqsave(&nesqp->pau_lock, flags);
skb_unlink(frags[i].skb, &nesqp->pau_list);
spin_unlock_irqrestore(&nesqp->pau_lock, flags);
} else {
/* Last skb still has data so update the seq */
iph = (struct iphdr *)(cb->data_start + ETH_HLEN);
tcph = (struct tcphdr *)(((char *)iph) + (4 * iph->ihl));
tcph->seq = cpu_to_be32(nesqp->pau_rcv_nxt);
}
}
out:
if (rc) {
if (fpdu_info) {
if (fpdu_info->cqp_request)
nes_put_cqp_request(nesdev, fpdu_info->cqp_request);
kfree(fpdu_info);
}
}
return rc;
}
/**
* forward_fpdu - send complete fpdus, one at a time
*/
static int forward_fpdus(struct nes_vnic *nesvnic, struct nes_qp *nesqp)
{
struct nes_device *nesdev = nesvnic->nesdev;
struct pau_fpdu_info *fpdu_info;
struct nes_hw_cqp_wqe *cqp_wqe;
struct nes_cqp_request *cqp_request;
u64 u64tmp;
u32 u32tmp;
int rc;
while (1) {
rc = get_fpdu_info(nesdev, nesqp, &fpdu_info);
if (fpdu_info == NULL)
return rc;
cqp_request = fpdu_info->cqp_request;
cqp_wqe = &cqp_request->cqp_wqe;
nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_DL_OPCODE_IDX,
NES_CQP_DOWNLOAD_SEGMENT |
(((u32)nesvnic->logical_port) << NES_CQP_OP_LOGICAL_PORT_SHIFT));
u32tmp = fpdu_info->hdr_len << 16;
u32tmp |= fpdu_info->hdr_len + (u32)fpdu_info->data_len;
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_DL_LENGTH_0_TOTAL_IDX,
u32tmp);
u32tmp = (fpdu_info->frags[1].frag_len << 16) | fpdu_info->frags[0].frag_len;
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_NIC_SQ_WQE_LENGTH_2_1_IDX,
u32tmp);
u32tmp = (fpdu_info->frags[3].frag_len << 16) | fpdu_info->frags[2].frag_len;
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_NIC_SQ_WQE_LENGTH_4_3_IDX,
u32tmp);
u64tmp = (u64)fpdu_info->hdr_pbase;
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_NIC_SQ_WQE_FRAG0_LOW_IDX,
lower_32_bits(u64tmp));
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_NIC_SQ_WQE_FRAG0_HIGH_IDX,
upper_32_bits(u64tmp >> 32));
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_NIC_SQ_WQE_FRAG1_LOW_IDX,
lower_32_bits(fpdu_info->frags[0].physaddr));
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_NIC_SQ_WQE_FRAG1_HIGH_IDX,
upper_32_bits(fpdu_info->frags[0].physaddr));
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_NIC_SQ_WQE_FRAG2_LOW_IDX,
lower_32_bits(fpdu_info->frags[1].physaddr));
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_NIC_SQ_WQE_FRAG2_HIGH_IDX,
upper_32_bits(fpdu_info->frags[1].physaddr));
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_NIC_SQ_WQE_FRAG3_LOW_IDX,
lower_32_bits(fpdu_info->frags[2].physaddr));
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_NIC_SQ_WQE_FRAG3_HIGH_IDX,
upper_32_bits(fpdu_info->frags[2].physaddr));
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_NIC_SQ_WQE_FRAG4_LOW_IDX,
lower_32_bits(fpdu_info->frags[3].physaddr));
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_NIC_SQ_WQE_FRAG4_HIGH_IDX,
upper_32_bits(fpdu_info->frags[3].physaddr));
cqp_request->cqp_callback_pointer = fpdu_info;
cqp_request->callback = 1;
cqp_request->cqp_callback = nes_download_callback;
atomic_set(&cqp_request->refcount, 1);
nes_post_cqp_request(nesdev, cqp_request);
}
return 0;
}
static void process_fpdus(struct nes_vnic *nesvnic, struct nes_qp *nesqp)
{
int again = 1;
unsigned long flags;
do {
/* Ignore rc - if it failed, tcp retries will cause it to try again */
forward_fpdus(nesvnic, nesqp);
spin_lock_irqsave(&nesqp->pau_lock, flags);
if (nesqp->pau_pending) {
nesqp->pau_pending = 0;
} else {
nesqp->pau_busy = 0;
again = 0;
}
spin_unlock_irqrestore(&nesqp->pau_lock, flags);
} while (again);
}
/**
* queue_fpdus - Handle fpdu's that hw passed up to sw
*/
static void queue_fpdus(struct sk_buff *skb, struct nes_vnic *nesvnic, struct nes_qp *nesqp)
{
struct sk_buff *tmpskb;
struct nes_rskb_cb *cb;
struct iphdr *iph;
struct tcphdr *tcph;
unsigned char *tcph_end;
u32 rcv_nxt;
u32 rcv_wnd;
u32 seqnum;
u32 len;
bool process_it = false;
unsigned long flags;
/* Move data ptr to after tcp header */
iph = (struct iphdr *)skb->data;
tcph = (struct tcphdr *)(((char *)iph) + (4 * iph->ihl));
seqnum = be32_to_cpu(tcph->seq);
tcph_end = (((char *)tcph) + (4 * tcph->doff));
len = be16_to_cpu(iph->tot_len);
if (skb->len > len)
skb_trim(skb, len);
skb_pull(skb, tcph_end - skb->data);
/* Initialize tracking values */
cb = (struct nes_rskb_cb *)&skb->cb[0];
cb->seqnum = seqnum;
/* Make sure data is in the receive window */
rcv_nxt = nesqp->pau_rcv_nxt;
rcv_wnd = le32_to_cpu(nesqp->nesqp_context->rcv_wnd);
if (!between(seqnum, rcv_nxt, (rcv_nxt + rcv_wnd))) {
nes_mgt_free_skb(nesvnic->nesdev, skb, PCI_DMA_TODEVICE);
nes_rem_ref_cm_node(nesqp->cm_node);
return;
}
spin_lock_irqsave(&nesqp->pau_lock, flags);
if (nesqp->pau_busy)
nesqp->pau_pending = 1;
else
nesqp->pau_busy = 1;
/* Queue skb by sequence number */
if (skb_queue_len(&nesqp->pau_list) == 0) {
skb_queue_head(&nesqp->pau_list, skb);
} else {
tmpskb = nesqp->pau_list.next;
while (tmpskb != (struct sk_buff *)&nesqp->pau_list) {
cb = (struct nes_rskb_cb *)&tmpskb->cb[0];
if (before(seqnum, cb->seqnum))
break;
tmpskb = tmpskb->next;
}
skb_insert(tmpskb, skb, &nesqp->pau_list);
}
if (nesqp->pau_state == PAU_READY)
process_it = true;
spin_unlock_irqrestore(&nesqp->pau_lock, flags);
if (process_it)
process_fpdus(nesvnic, nesqp);
return;
}
/**
* mgt_thread - Handle mgt skbs in a safe context
*/
static int mgt_thread(void *context)
{
struct nes_vnic *nesvnic = context;
struct sk_buff *skb;
struct nes_rskb_cb *cb;
while (!kthread_should_stop()) {
wait_event_interruptible(nesvnic->mgt_wait_queue,
skb_queue_len(&nesvnic->mgt_skb_list) || kthread_should_stop());
while ((skb_queue_len(&nesvnic->mgt_skb_list)) && !kthread_should_stop()) {
skb = skb_dequeue(&nesvnic->mgt_skb_list);
cb = (struct nes_rskb_cb *)&skb->cb[0];
cb->data_start = skb->data - ETH_HLEN;
cb->busaddr = pci_map_single(nesvnic->nesdev->pcidev, cb->data_start,
nesvnic->max_frame_size, PCI_DMA_TODEVICE);
queue_fpdus(skb, nesvnic, cb->nesqp);
}
}
/* Closing down so delete any entries on the queue */
while (skb_queue_len(&nesvnic->mgt_skb_list)) {
skb = skb_dequeue(&nesvnic->mgt_skb_list);
cb = (struct nes_rskb_cb *)&skb->cb[0];
nes_rem_ref_cm_node(cb->nesqp->cm_node);
dev_kfree_skb_any(skb);
}
return 0;
}
/**
* nes_queue_skbs - Queue skb so it can be handled in a thread context
*/
void nes_queue_mgt_skbs(struct sk_buff *skb, struct nes_vnic *nesvnic, struct nes_qp *nesqp)
{
struct nes_rskb_cb *cb;
cb = (struct nes_rskb_cb *)&skb->cb[0];
cb->nesqp = nesqp;
skb_queue_tail(&nesvnic->mgt_skb_list, skb);
wake_up_interruptible(&nesvnic->mgt_wait_queue);
}
void nes_destroy_pau_qp(struct nes_device *nesdev, struct nes_qp *nesqp)
{
struct sk_buff *skb;
unsigned long flags;
atomic_inc(&pau_qps_destroyed);
/* Free packets that have not yet been forwarded */
/* Lock is acquired by skb_dequeue when removing the skb */
spin_lock_irqsave(&nesqp->pau_lock, flags);
while (skb_queue_len(&nesqp->pau_list)) {
skb = skb_dequeue(&nesqp->pau_list);
nes_mgt_free_skb(nesdev, skb, PCI_DMA_TODEVICE);
nes_rem_ref_cm_node(nesqp->cm_node);
}
spin_unlock_irqrestore(&nesqp->pau_lock, flags);
}
static void nes_chg_qh_handler(struct nes_device *nesdev, struct nes_cqp_request *cqp_request)
{
struct pau_qh_chg *qh_chg = cqp_request->cqp_callback_pointer;
struct nes_cqp_request *new_request;
struct nes_hw_cqp_wqe *cqp_wqe;
struct nes_adapter *nesadapter;
struct nes_qp *nesqp;
struct nes_v4_quad nes_quad;
u32 crc_value;
u64 u64temp;
nesadapter = nesdev->nesadapter;
nesqp = qh_chg->nesqp;
/* Should we handle the bad completion */
if (cqp_request->major_code) {
printk(KERN_ERR PFX "Invalid cqp_request major_code=0x%x\n",
cqp_request->major_code);
WARN_ON(1);
}
switch (nesqp->pau_state) {
case PAU_DEL_QH:
/* Old hash code deleted, now set the new one */
nesqp->pau_state = PAU_ADD_LB_QH;
new_request = nes_get_cqp_request(nesdev);
if (new_request == NULL) {
nes_debug(NES_DBG_PAU, "Failed to get a new_request.\n");
WARN_ON(1);
return;
}
memset(&nes_quad, 0, sizeof(nes_quad));
nes_quad.DstIpAdrIndex =
cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
nes_quad.SrcIpadr = cpu_to_be32(0x7f000001);
nes_quad.TcpPorts[0] = swab16(nesqp->nesqp_context->tcpPorts[1]);
nes_quad.TcpPorts[1] = swab16(nesqp->nesqp_context->tcpPorts[0]);
/* Produce hash key */
crc_value = get_crc_value(&nes_quad);
nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
nes_debug(NES_DBG_PAU, "new HTE Index = 0x%08X, CRC = 0x%08X\n",
nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
nesqp->hte_index &= nesadapter->hte_index_mask;
nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
nesqp->nesqp_context->ip0 = cpu_to_le32(0x7f000001);
nesqp->nesqp_context->rcv_nxt = cpu_to_le32(nesqp->pau_rcv_nxt);
cqp_wqe = &new_request->cqp_wqe;
nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
set_wqe_32bit_value(cqp_wqe->wqe_words,
NES_CQP_WQE_OPCODE_IDX, NES_CQP_MANAGE_QUAD_HASH |
NES_CQP_QP_TYPE_IWARP | NES_CQP_QP_CONTEXT_VALID | NES_CQP_QP_IWARP_STATE_RTS);
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX, nesqp->hwqp.qp_id);
u64temp = (u64)nesqp->nesqp_context_pbase;
set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, u64temp);
nes_debug(NES_DBG_PAU, "Waiting for CQP completion for adding the quad hash.\n");
new_request->cqp_callback_pointer = qh_chg;
new_request->callback = 1;
new_request->cqp_callback = nes_chg_qh_handler;
atomic_set(&new_request->refcount, 1);
nes_post_cqp_request(nesdev, new_request);
break;
case PAU_ADD_LB_QH:
/* Start processing the queued fpdu's */
nesqp->pau_state = PAU_READY;
process_fpdus(qh_chg->nesvnic, qh_chg->nesqp);
kfree(qh_chg);
break;
}
}
/**
* nes_change_quad_hash
*/
static int nes_change_quad_hash(struct nes_device *nesdev,
struct nes_vnic *nesvnic, struct nes_qp *nesqp)
{
struct nes_cqp_request *cqp_request = NULL;
struct pau_qh_chg *qh_chg = NULL;
u64 u64temp;
struct nes_hw_cqp_wqe *cqp_wqe;
int ret = 0;
cqp_request = nes_get_cqp_request(nesdev);
if (cqp_request == NULL) {
nes_debug(NES_DBG_PAU, "Failed to get a cqp_request.\n");
ret = -ENOMEM;
goto chg_qh_err;
}
qh_chg = kmalloc(sizeof *qh_chg, GFP_ATOMIC);
if (qh_chg == NULL) {
nes_debug(NES_DBG_PAU, "Failed to get a cqp_request.\n");
ret = -ENOMEM;
goto chg_qh_err;
}
qh_chg->nesdev = nesdev;
qh_chg->nesvnic = nesvnic;
qh_chg->nesqp = nesqp;
nesqp->pau_state = PAU_DEL_QH;
cqp_wqe = &cqp_request->cqp_wqe;
nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
set_wqe_32bit_value(cqp_wqe->wqe_words,
NES_CQP_WQE_OPCODE_IDX, NES_CQP_MANAGE_QUAD_HASH | NES_CQP_QP_DEL_HTE |
NES_CQP_QP_TYPE_IWARP | NES_CQP_QP_CONTEXT_VALID | NES_CQP_QP_IWARP_STATE_RTS);
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX, nesqp->hwqp.qp_id);
u64temp = (u64)nesqp->nesqp_context_pbase;
set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, u64temp);
nes_debug(NES_DBG_PAU, "Waiting for CQP completion for deleting the quad hash.\n");
cqp_request->cqp_callback_pointer = qh_chg;
cqp_request->callback = 1;
cqp_request->cqp_callback = nes_chg_qh_handler;
atomic_set(&cqp_request->refcount, 1);
nes_post_cqp_request(nesdev, cqp_request);
return ret;
chg_qh_err:
kfree(qh_chg);
if (cqp_request)
nes_put_cqp_request(nesdev, cqp_request);
return ret;
}
/**
* nes_mgt_ce_handler
* This management code deals with any packed and unaligned (pau) fpdu's
* that the hardware cannot handle.
*/
static void nes_mgt_ce_handler(struct nes_device *nesdev, struct nes_hw_nic_cq *cq)
{
struct nes_vnic_mgt *mgtvnic = container_of(cq, struct nes_vnic_mgt, mgt_cq);
struct nes_adapter *nesadapter = nesdev->nesadapter;
u32 head;
u32 cq_size;
u32 cqe_count = 0;
u32 cqe_misc;
u32 qp_id = 0;
u32 skbs_needed;
unsigned long context;
struct nes_qp *nesqp;
struct sk_buff *rx_skb;
struct nes_rskb_cb *cb;
head = cq->cq_head;
cq_size = cq->cq_size;
while (1) {
cqe_misc = le32_to_cpu(cq->cq_vbase[head].cqe_words[NES_NIC_CQE_MISC_IDX]);
if (!(cqe_misc & NES_NIC_CQE_VALID))
break;
nesqp = NULL;
if (cqe_misc & NES_NIC_CQE_ACCQP_VALID) {
qp_id = le32_to_cpu(cq->cq_vbase[head].cqe_words[NES_NIC_CQE_ACCQP_ID_IDX]);
qp_id &= 0x001fffff;
if (qp_id < nesadapter->max_qp) {
context = (unsigned long)nesadapter->qp_table[qp_id - NES_FIRST_QPN];
nesqp = (struct nes_qp *)context;
}
}
if (nesqp) {
if (nesqp->pau_mode == false) {
nesqp->pau_mode = true; /* First time for this qp */
nesqp->pau_rcv_nxt = le32_to_cpu(
cq->cq_vbase[head].cqe_words[NES_NIC_CQE_HASH_RCVNXT]);
skb_queue_head_init(&nesqp->pau_list);
spin_lock_init(&nesqp->pau_lock);
atomic_inc(&pau_qps_created);
nes_change_quad_hash(nesdev, mgtvnic->nesvnic, nesqp);
}
rx_skb = mgtvnic->mgt.rx_skb[mgtvnic->mgt.rq_tail];
rx_skb->len = 0;
skb_put(rx_skb, cqe_misc & 0x0000ffff);
rx_skb->protocol = eth_type_trans(rx_skb, mgtvnic->nesvnic->netdev);
cb = (struct nes_rskb_cb *)&rx_skb->cb[0];
pci_unmap_single(nesdev->pcidev, cb->busaddr, cb->maplen, PCI_DMA_FROMDEVICE);
cb->busaddr = 0;
mgtvnic->mgt.rq_tail++;
mgtvnic->mgt.rq_tail &= mgtvnic->mgt.rq_size - 1;
nes_add_ref_cm_node(nesqp->cm_node);
nes_queue_mgt_skbs(rx_skb, mgtvnic->nesvnic, nesqp);
} else {
printk(KERN_ERR PFX "Invalid QP %d for packed/unaligned handling\n", qp_id);
}
cq->cq_vbase[head].cqe_words[NES_NIC_CQE_MISC_IDX] = 0;
cqe_count++;
if (++head >= cq_size)
head = 0;
if (cqe_count == 255) {
/* Replenish mgt CQ */
nes_write32(nesdev->regs + NES_CQE_ALLOC, cq->cq_number | (cqe_count << 16));
nesdev->currcq_count += cqe_count;
cqe_count = 0;
}
skbs_needed = atomic_inc_return(&mgtvnic->rx_skbs_needed);
if (skbs_needed > (mgtvnic->mgt.rq_size >> 1))
nes_replenish_mgt_rq(mgtvnic);
}
cq->cq_head = head;
nes_write32(nesdev->regs + NES_CQE_ALLOC, NES_CQE_ALLOC_NOTIFY_NEXT |
cq->cq_number | (cqe_count << 16));
nes_read32(nesdev->regs + NES_CQE_ALLOC);
nesdev->currcq_count += cqe_count;
}
/**
* nes_init_mgt_qp
*/
int nes_init_mgt_qp(struct nes_device *nesdev, struct net_device *netdev, struct nes_vnic *nesvnic)
{
struct nes_vnic_mgt *mgtvnic;
u32 counter;
void *vmem;
dma_addr_t pmem;
struct nes_hw_cqp_wqe *cqp_wqe;
u32 cqp_head;
unsigned long flags;
struct nes_hw_nic_qp_context *mgt_context;
u64 u64temp;
struct nes_hw_nic_rq_wqe *mgt_rqe;
struct sk_buff *skb;
u32 wqe_count;
struct nes_rskb_cb *cb;
u32 mgt_mem_size;
void *mgt_vbase;
dma_addr_t mgt_pbase;
int i;
int ret;
/* Allocate space the all mgt QPs once */
mgtvnic = kzalloc(NES_MGT_QP_COUNT * sizeof(struct nes_vnic_mgt), GFP_KERNEL);
if (mgtvnic == NULL) {
nes_debug(NES_DBG_INIT, "Unable to allocate memory for mgt structure\n");
return -ENOMEM;
}
/* Allocate fragment, RQ, and CQ; Reuse CEQ based on the PCI function */
/* We are not sending from this NIC so sq is not allocated */
mgt_mem_size = 256 +
(NES_MGT_WQ_COUNT * sizeof(struct nes_hw_nic_rq_wqe)) +
(NES_MGT_WQ_COUNT * sizeof(struct nes_hw_nic_cqe)) +
sizeof(struct nes_hw_nic_qp_context);
mgt_mem_size = (mgt_mem_size + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1);
mgt_vbase = pci_alloc_consistent(nesdev->pcidev, NES_MGT_QP_COUNT * mgt_mem_size, &mgt_pbase);
if (!mgt_vbase) {
kfree(mgtvnic);
nes_debug(NES_DBG_INIT, "Unable to allocate memory for mgt host descriptor rings\n");
return -ENOMEM;
}
nesvnic->mgt_mem_size = NES_MGT_QP_COUNT * mgt_mem_size;
nesvnic->mgt_vbase = mgt_vbase;
nesvnic->mgt_pbase = mgt_pbase;
skb_queue_head_init(&nesvnic->mgt_skb_list);
init_waitqueue_head(&nesvnic->mgt_wait_queue);
nesvnic->mgt_thread = kthread_run(mgt_thread, nesvnic, "nes_mgt_thread");
for (i = 0; i < NES_MGT_QP_COUNT; i++) {
mgtvnic->nesvnic = nesvnic;
mgtvnic->mgt.qp_id = nesdev->mac_index + NES_MGT_QP_OFFSET + i;
memset(mgt_vbase, 0, mgt_mem_size);
nes_debug(NES_DBG_INIT, "Allocated mgt QP structures at %p (phys = %016lX), size = %u.\n",
mgt_vbase, (unsigned long)mgt_pbase, mgt_mem_size);
vmem = (void *)(((unsigned long)mgt_vbase + (256 - 1)) &
~(unsigned long)(256 - 1));
pmem = (dma_addr_t)(((unsigned long long)mgt_pbase + (256 - 1)) &
~(unsigned long long)(256 - 1));
spin_lock_init(&mgtvnic->mgt.rq_lock);
/* setup the RQ */
mgtvnic->mgt.rq_vbase = vmem;
mgtvnic->mgt.rq_pbase = pmem;
mgtvnic->mgt.rq_head = 0;
mgtvnic->mgt.rq_tail = 0;
mgtvnic->mgt.rq_size = NES_MGT_WQ_COUNT;
/* setup the CQ */
vmem += (NES_MGT_WQ_COUNT * sizeof(struct nes_hw_nic_rq_wqe));
pmem += (NES_MGT_WQ_COUNT * sizeof(struct nes_hw_nic_rq_wqe));
mgtvnic->mgt_cq.cq_number = mgtvnic->mgt.qp_id;
mgtvnic->mgt_cq.cq_vbase = vmem;
mgtvnic->mgt_cq.cq_pbase = pmem;
mgtvnic->mgt_cq.cq_head = 0;
mgtvnic->mgt_cq.cq_size = NES_MGT_WQ_COUNT;
mgtvnic->mgt_cq.ce_handler = nes_mgt_ce_handler;
/* Send CreateCQ request to CQP */
spin_lock_irqsave(&nesdev->cqp.lock, flags);
cqp_head = nesdev->cqp.sq_head;
cqp_wqe = &nesdev->cqp.sq_vbase[cqp_head];
nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX] = cpu_to_le32(
NES_CQP_CREATE_CQ | NES_CQP_CQ_CEQ_VALID |
((u32)mgtvnic->mgt_cq.cq_size << 16));
cqp_wqe->wqe_words[NES_CQP_WQE_ID_IDX] = cpu_to_le32(
mgtvnic->mgt_cq.cq_number | ((u32)nesdev->ceq_index << 16));
u64temp = (u64)mgtvnic->mgt_cq.cq_pbase;
set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_CQ_WQE_PBL_LOW_IDX, u64temp);
cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_HIGH_IDX] = 0;
u64temp = (unsigned long)&mgtvnic->mgt_cq;
cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_LOW_IDX] = cpu_to_le32((u32)(u64temp >> 1));
cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_HIGH_IDX] =
cpu_to_le32(((u32)((u64temp) >> 33)) & 0x7FFFFFFF);
cqp_wqe->wqe_words[NES_CQP_CQ_WQE_DOORBELL_INDEX_HIGH_IDX] = 0;
if (++cqp_head >= nesdev->cqp.sq_size)
cqp_head = 0;
cqp_wqe = &nesdev->cqp.sq_vbase[cqp_head];
nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
/* Send CreateQP request to CQP */
mgt_context = (void *)(&mgtvnic->mgt_cq.cq_vbase[mgtvnic->mgt_cq.cq_size]);
mgt_context->context_words[NES_NIC_CTX_MISC_IDX] =
cpu_to_le32((u32)NES_MGT_CTX_SIZE |
((u32)PCI_FUNC(nesdev->pcidev->devfn) << 12));
nes_debug(NES_DBG_INIT, "RX_WINDOW_BUFFER_PAGE_TABLE_SIZE = 0x%08X, RX_WINDOW_BUFFER_SIZE = 0x%08X\n",
nes_read_indexed(nesdev, NES_IDX_RX_WINDOW_BUFFER_PAGE_TABLE_SIZE),
nes_read_indexed(nesdev, NES_IDX_RX_WINDOW_BUFFER_SIZE));
if (nes_read_indexed(nesdev, NES_IDX_RX_WINDOW_BUFFER_SIZE) != 0)
mgt_context->context_words[NES_NIC_CTX_MISC_IDX] |= cpu_to_le32(NES_NIC_BACK_STORE);
u64temp = (u64)mgtvnic->mgt.rq_pbase;
mgt_context->context_words[NES_NIC_CTX_SQ_LOW_IDX] = cpu_to_le32((u32)u64temp);
mgt_context->context_words[NES_NIC_CTX_SQ_HIGH_IDX] = cpu_to_le32((u32)(u64temp >> 32));
u64temp = (u64)mgtvnic->mgt.rq_pbase;
mgt_context->context_words[NES_NIC_CTX_RQ_LOW_IDX] = cpu_to_le32((u32)u64temp);
mgt_context->context_words[NES_NIC_CTX_RQ_HIGH_IDX] = cpu_to_le32((u32)(u64temp >> 32));
cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX] = cpu_to_le32(NES_CQP_CREATE_QP |
NES_CQP_QP_TYPE_NIC);
cqp_wqe->wqe_words[NES_CQP_WQE_ID_IDX] = cpu_to_le32(mgtvnic->mgt.qp_id);
u64temp = (u64)mgtvnic->mgt_cq.cq_pbase +
(mgtvnic->mgt_cq.cq_size * sizeof(struct nes_hw_nic_cqe));
set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, u64temp);
if (++cqp_head >= nesdev->cqp.sq_size)
cqp_head = 0;
nesdev->cqp.sq_head = cqp_head;
barrier();
/* Ring doorbell (2 WQEs) */
nes_write32(nesdev->regs + NES_WQE_ALLOC, 0x02800000 | nesdev->cqp.qp_id);
spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
nes_debug(NES_DBG_INIT, "Waiting for create MGT QP%u to complete.\n",
mgtvnic->mgt.qp_id);
ret = wait_event_timeout(nesdev->cqp.waitq, (nesdev->cqp.sq_tail == cqp_head),
NES_EVENT_TIMEOUT);
nes_debug(NES_DBG_INIT, "Create MGT QP%u completed, wait_event_timeout ret = %u.\n",
mgtvnic->mgt.qp_id, ret);
if (!ret) {
nes_debug(NES_DBG_INIT, "MGT QP%u create timeout expired\n", mgtvnic->mgt.qp_id);
if (i == 0) {
pci_free_consistent(nesdev->pcidev, nesvnic->mgt_mem_size, nesvnic->mgt_vbase,
nesvnic->mgt_pbase);
kfree(mgtvnic);
} else {
nes_destroy_mgt(nesvnic);
}
return -EIO;
}
/* Populate the RQ */
for (counter = 0; counter < (NES_MGT_WQ_COUNT - 1); counter++) {
skb = dev_alloc_skb(nesvnic->max_frame_size);
if (!skb) {
nes_debug(NES_DBG_INIT, "%s: out of memory for receive skb\n", netdev->name);
return -ENOMEM;
}
skb->dev = netdev;
pmem = pci_map_single(nesdev->pcidev, skb->data,
nesvnic->max_frame_size, PCI_DMA_FROMDEVICE);
cb = (struct nes_rskb_cb *)&skb->cb[0];
cb->busaddr = pmem;
cb->maplen = nesvnic->max_frame_size;
mgt_rqe = &mgtvnic->mgt.rq_vbase[counter];
mgt_rqe->wqe_words[NES_NIC_RQ_WQE_LENGTH_1_0_IDX] = cpu_to_le32((u32)nesvnic->max_frame_size);
mgt_rqe->wqe_words[NES_NIC_RQ_WQE_LENGTH_3_2_IDX] = 0;
mgt_rqe->wqe_words[NES_NIC_RQ_WQE_FRAG0_LOW_IDX] = cpu_to_le32((u32)pmem);
mgt_rqe->wqe_words[NES_NIC_RQ_WQE_FRAG0_HIGH_IDX] = cpu_to_le32((u32)((u64)pmem >> 32));
mgtvnic->mgt.rx_skb[counter] = skb;
}
init_timer(&mgtvnic->rq_wqes_timer);
mgtvnic->rq_wqes_timer.function = nes_mgt_rq_wqes_timeout;
mgtvnic->rq_wqes_timer.data = (unsigned long)mgtvnic;
wqe_count = NES_MGT_WQ_COUNT - 1;
mgtvnic->mgt.rq_head = wqe_count;
barrier();
do {
counter = min(wqe_count, ((u32)255));
wqe_count -= counter;
nes_write32(nesdev->regs + NES_WQE_ALLOC, (counter << 24) | mgtvnic->mgt.qp_id);
} while (wqe_count);
nes_write32(nesdev->regs + NES_CQE_ALLOC, NES_CQE_ALLOC_NOTIFY_NEXT |
mgtvnic->mgt_cq.cq_number);
nes_read32(nesdev->regs + NES_CQE_ALLOC);
mgt_vbase += mgt_mem_size;
mgt_pbase += mgt_mem_size;
nesvnic->mgtvnic[i] = mgtvnic++;
}
return 0;
}
void nes_destroy_mgt(struct nes_vnic *nesvnic)
{
struct nes_device *nesdev = nesvnic->nesdev;
struct nes_vnic_mgt *mgtvnic;
struct nes_vnic_mgt *first_mgtvnic;
unsigned long flags;
struct nes_hw_cqp_wqe *cqp_wqe;
u32 cqp_head;
struct sk_buff *rx_skb;
int i;
int ret;
kthread_stop(nesvnic->mgt_thread);
/* Free remaining NIC receive buffers */
first_mgtvnic = nesvnic->mgtvnic[0];
for (i = 0; i < NES_MGT_QP_COUNT; i++) {
mgtvnic = nesvnic->mgtvnic[i];
if (mgtvnic == NULL)
continue;
while (mgtvnic->mgt.rq_head != mgtvnic->mgt.rq_tail) {
rx_skb = mgtvnic->mgt.rx_skb[mgtvnic->mgt.rq_tail];
nes_mgt_free_skb(nesdev, rx_skb, PCI_DMA_FROMDEVICE);
mgtvnic->mgt.rq_tail++;
mgtvnic->mgt.rq_tail &= (mgtvnic->mgt.rq_size - 1);
}
spin_lock_irqsave(&nesdev->cqp.lock, flags);
/* Destroy NIC QP */
cqp_head = nesdev->cqp.sq_head;
cqp_wqe = &nesdev->cqp.sq_vbase[cqp_head];
nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX,
(NES_CQP_DESTROY_QP | NES_CQP_QP_TYPE_NIC));
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX,
mgtvnic->mgt.qp_id);
if (++cqp_head >= nesdev->cqp.sq_size)
cqp_head = 0;
cqp_wqe = &nesdev->cqp.sq_vbase[cqp_head];
/* Destroy NIC CQ */
nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX,
(NES_CQP_DESTROY_CQ | ((u32)mgtvnic->mgt_cq.cq_size << 16)));
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX,
(mgtvnic->mgt_cq.cq_number | ((u32)nesdev->ceq_index << 16)));
if (++cqp_head >= nesdev->cqp.sq_size)
cqp_head = 0;
nesdev->cqp.sq_head = cqp_head;
barrier();
/* Ring doorbell (2 WQEs) */
nes_write32(nesdev->regs + NES_WQE_ALLOC, 0x02800000 | nesdev->cqp.qp_id);
spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
nes_debug(NES_DBG_SHUTDOWN, "Waiting for CQP, cqp_head=%u, cqp.sq_head=%u,"
" cqp.sq_tail=%u, cqp.sq_size=%u\n",
cqp_head, nesdev->cqp.sq_head,
nesdev->cqp.sq_tail, nesdev->cqp.sq_size);
ret = wait_event_timeout(nesdev->cqp.waitq, (nesdev->cqp.sq_tail == cqp_head),
NES_EVENT_TIMEOUT);
nes_debug(NES_DBG_SHUTDOWN, "Destroy MGT QP returned, wait_event_timeout ret = %u, cqp_head=%u,"
" cqp.sq_head=%u, cqp.sq_tail=%u\n",
ret, cqp_head, nesdev->cqp.sq_head, nesdev->cqp.sq_tail);
if (!ret)
nes_debug(NES_DBG_SHUTDOWN, "MGT QP%u destroy timeout expired\n",
mgtvnic->mgt.qp_id);
nesvnic->mgtvnic[i] = NULL;
}
if (nesvnic->mgt_vbase) {
pci_free_consistent(nesdev->pcidev, nesvnic->mgt_mem_size, nesvnic->mgt_vbase,
nesvnic->mgt_pbase);
nesvnic->mgt_vbase = NULL;
nesvnic->mgt_pbase = 0;
}
kfree(first_mgtvnic);
}
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