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linuxdebug/drivers/infiniband/hw/irdma/puda.c

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null pointer error
2024-07-16 15:50:57 +02:00
// SPDX-License-Identifier: GPL-2.0 or Linux-OpenIB
/* Copyright (c) 2015 - 2021 Intel Corporation */
#include "osdep.h"
#include "hmc.h"
#include "defs.h"
#include "type.h"
#include "protos.h"
#include "puda.h"
#include "ws.h"
static void irdma_ieq_receive(struct irdma_sc_vsi *vsi,
struct irdma_puda_buf *buf);
static void irdma_ieq_tx_compl(struct irdma_sc_vsi *vsi, void *sqwrid);
static void irdma_ilq_putback_rcvbuf(struct irdma_sc_qp *qp,
struct irdma_puda_buf *buf, u32 wqe_idx);
/**
* irdma_puda_get_listbuf - get buffer from puda list
* @list: list to use for buffers (ILQ or IEQ)
*/
static struct irdma_puda_buf *irdma_puda_get_listbuf(struct list_head *list)
{
struct irdma_puda_buf *buf = NULL;
if (!list_empty(list)) {
buf = (struct irdma_puda_buf *)list->next;
list_del((struct list_head *)&buf->list);
}
return buf;
}
/**
* irdma_puda_get_bufpool - return buffer from resource
* @rsrc: resource to use for buffer
*/
struct irdma_puda_buf *irdma_puda_get_bufpool(struct irdma_puda_rsrc *rsrc)
{
struct irdma_puda_buf *buf = NULL;
struct list_head *list = &rsrc->bufpool;
unsigned long flags;
spin_lock_irqsave(&rsrc->bufpool_lock, flags);
buf = irdma_puda_get_listbuf(list);
if (buf) {
rsrc->avail_buf_count--;
buf->vsi = rsrc->vsi;
} else {
rsrc->stats_buf_alloc_fail++;
}
spin_unlock_irqrestore(&rsrc->bufpool_lock, flags);
return buf;
}
/**
* irdma_puda_ret_bufpool - return buffer to rsrc list
* @rsrc: resource to use for buffer
* @buf: buffer to return to resource
*/
void irdma_puda_ret_bufpool(struct irdma_puda_rsrc *rsrc,
struct irdma_puda_buf *buf)
{
unsigned long flags;
buf->do_lpb = false;
spin_lock_irqsave(&rsrc->bufpool_lock, flags);
list_add(&buf->list, &rsrc->bufpool);
spin_unlock_irqrestore(&rsrc->bufpool_lock, flags);
rsrc->avail_buf_count++;
}
/**
* irdma_puda_post_recvbuf - set wqe for rcv buffer
* @rsrc: resource ptr
* @wqe_idx: wqe index to use
* @buf: puda buffer for rcv q
* @initial: flag if during init time
*/
static void irdma_puda_post_recvbuf(struct irdma_puda_rsrc *rsrc, u32 wqe_idx,
struct irdma_puda_buf *buf, bool initial)
{
__le64 *wqe;
struct irdma_sc_qp *qp = &rsrc->qp;
u64 offset24 = 0;
/* Synch buffer for use by device */
dma_sync_single_for_device(rsrc->dev->hw->device, buf->mem.pa,
buf->mem.size, DMA_BIDIRECTIONAL);
qp->qp_uk.rq_wrid_array[wqe_idx] = (uintptr_t)buf;
wqe = qp->qp_uk.rq_base[wqe_idx].elem;
if (!initial)
get_64bit_val(wqe, 24, &offset24);
offset24 = (offset24) ? 0 : FIELD_PREP(IRDMAQPSQ_VALID, 1);
set_64bit_val(wqe, 16, 0);
set_64bit_val(wqe, 0, buf->mem.pa);
if (qp->qp_uk.uk_attrs->hw_rev == IRDMA_GEN_1) {
set_64bit_val(wqe, 8,
FIELD_PREP(IRDMAQPSQ_GEN1_FRAG_LEN, buf->mem.size));
} else {
set_64bit_val(wqe, 8,
FIELD_PREP(IRDMAQPSQ_FRAG_LEN, buf->mem.size) |
offset24);
}
dma_wmb(); /* make sure WQE is written before valid bit is set */
set_64bit_val(wqe, 24, offset24);
}
/**
* irdma_puda_replenish_rq - post rcv buffers
* @rsrc: resource to use for buffer
* @initial: flag if during init time
*/
static int irdma_puda_replenish_rq(struct irdma_puda_rsrc *rsrc, bool initial)
{
u32 i;
u32 invalid_cnt = rsrc->rxq_invalid_cnt;
struct irdma_puda_buf *buf = NULL;
for (i = 0; i < invalid_cnt; i++) {
buf = irdma_puda_get_bufpool(rsrc);
if (!buf)
return -ENOBUFS;
irdma_puda_post_recvbuf(rsrc, rsrc->rx_wqe_idx, buf, initial);
rsrc->rx_wqe_idx = ((rsrc->rx_wqe_idx + 1) % rsrc->rq_size);
rsrc->rxq_invalid_cnt--;
}
return 0;
}
/**
* irdma_puda_alloc_buf - allocate mem for buffer
* @dev: iwarp device
* @len: length of buffer
*/
static struct irdma_puda_buf *irdma_puda_alloc_buf(struct irdma_sc_dev *dev,
u32 len)
{
struct irdma_puda_buf *buf;
struct irdma_virt_mem buf_mem;
buf_mem.size = sizeof(struct irdma_puda_buf);
buf_mem.va = kzalloc(buf_mem.size, GFP_KERNEL);
if (!buf_mem.va)
return NULL;
buf = buf_mem.va;
buf->mem.size = len;
buf->mem.va = kzalloc(buf->mem.size, GFP_KERNEL);
if (!buf->mem.va)
goto free_virt;
buf->mem.pa = dma_map_single(dev->hw->device, buf->mem.va,
buf->mem.size, DMA_BIDIRECTIONAL);
if (dma_mapping_error(dev->hw->device, buf->mem.pa)) {
kfree(buf->mem.va);
goto free_virt;
}
buf->buf_mem.va = buf_mem.va;
buf->buf_mem.size = buf_mem.size;
return buf;
free_virt:
kfree(buf_mem.va);
return NULL;
}
/**
* irdma_puda_dele_buf - delete buffer back to system
* @dev: iwarp device
* @buf: buffer to free
*/
static void irdma_puda_dele_buf(struct irdma_sc_dev *dev,
struct irdma_puda_buf *buf)
{
dma_unmap_single(dev->hw->device, buf->mem.pa, buf->mem.size,
DMA_BIDIRECTIONAL);
kfree(buf->mem.va);
kfree(buf->buf_mem.va);
}
/**
* irdma_puda_get_next_send_wqe - return next wqe for processing
* @qp: puda qp for wqe
* @wqe_idx: wqe index for caller
*/
static __le64 *irdma_puda_get_next_send_wqe(struct irdma_qp_uk *qp,
u32 *wqe_idx)
{
int ret_code = 0;
*wqe_idx = IRDMA_RING_CURRENT_HEAD(qp->sq_ring);
if (!*wqe_idx)
qp->swqe_polarity = !qp->swqe_polarity;
IRDMA_RING_MOVE_HEAD(qp->sq_ring, ret_code);
if (ret_code)
return NULL;
return qp->sq_base[*wqe_idx].elem;
}
/**
* irdma_puda_poll_info - poll cq for completion
* @cq: cq for poll
* @info: info return for successful completion
*/
static int irdma_puda_poll_info(struct irdma_sc_cq *cq,
struct irdma_puda_cmpl_info *info)
{
struct irdma_cq_uk *cq_uk = &cq->cq_uk;
u64 qword0, qword2, qword3, qword6;
__le64 *cqe;
__le64 *ext_cqe = NULL;
u64 qword7 = 0;
u64 comp_ctx;
bool valid_bit;
bool ext_valid = 0;
u32 major_err, minor_err;
u32 peek_head;
bool error;
u8 polarity;
cqe = IRDMA_GET_CURRENT_CQ_ELEM(&cq->cq_uk);
get_64bit_val(cqe, 24, &qword3);
valid_bit = (bool)FIELD_GET(IRDMA_CQ_VALID, qword3);
if (valid_bit != cq_uk->polarity)
return -ENOENT;
/* Ensure CQE contents are read after valid bit is checked */
dma_rmb();
if (cq->dev->hw_attrs.uk_attrs.hw_rev >= IRDMA_GEN_2)
ext_valid = (bool)FIELD_GET(IRDMA_CQ_EXTCQE, qword3);
if (ext_valid) {
peek_head = (cq_uk->cq_ring.head + 1) % cq_uk->cq_ring.size;
ext_cqe = cq_uk->cq_base[peek_head].buf;
get_64bit_val(ext_cqe, 24, &qword7);
polarity = (u8)FIELD_GET(IRDMA_CQ_VALID, qword7);
if (!peek_head)
polarity ^= 1;
if (polarity != cq_uk->polarity)
return -ENOENT;
/* Ensure ext CQE contents are read after ext valid bit is checked */
dma_rmb();
IRDMA_RING_MOVE_HEAD_NOCHECK(cq_uk->cq_ring);
if (!IRDMA_RING_CURRENT_HEAD(cq_uk->cq_ring))
cq_uk->polarity = !cq_uk->polarity;
/* update cq tail in cq shadow memory also */
IRDMA_RING_MOVE_TAIL(cq_uk->cq_ring);
}
print_hex_dump_debug("PUDA: PUDA CQE", DUMP_PREFIX_OFFSET, 16, 8, cqe,
32, false);
if (ext_valid)
print_hex_dump_debug("PUDA: PUDA EXT-CQE", DUMP_PREFIX_OFFSET,
16, 8, ext_cqe, 32, false);
error = (bool)FIELD_GET(IRDMA_CQ_ERROR, qword3);
if (error) {
ibdev_dbg(to_ibdev(cq->dev), "PUDA: receive error\n");
major_err = (u32)(FIELD_GET(IRDMA_CQ_MAJERR, qword3));
minor_err = (u32)(FIELD_GET(IRDMA_CQ_MINERR, qword3));
info->compl_error = major_err << 16 | minor_err;
return -EIO;
}
get_64bit_val(cqe, 0, &qword0);
get_64bit_val(cqe, 16, &qword2);
info->q_type = (u8)FIELD_GET(IRDMA_CQ_SQ, qword3);
info->qp_id = (u32)FIELD_GET(IRDMACQ_QPID, qword2);
if (cq->dev->hw_attrs.uk_attrs.hw_rev >= IRDMA_GEN_2)
info->ipv4 = (bool)FIELD_GET(IRDMACQ_IPV4, qword3);
get_64bit_val(cqe, 8, &comp_ctx);
info->qp = (struct irdma_qp_uk *)(unsigned long)comp_ctx;
info->wqe_idx = (u32)FIELD_GET(IRDMA_CQ_WQEIDX, qword3);
if (info->q_type == IRDMA_CQE_QTYPE_RQ) {
if (ext_valid) {
info->vlan_valid = (bool)FIELD_GET(IRDMA_CQ_UDVLANVALID, qword7);
if (info->vlan_valid) {
get_64bit_val(ext_cqe, 16, &qword6);
info->vlan = (u16)FIELD_GET(IRDMA_CQ_UDVLAN, qword6);
}
info->smac_valid = (bool)FIELD_GET(IRDMA_CQ_UDSMACVALID, qword7);
if (info->smac_valid) {
get_64bit_val(ext_cqe, 16, &qword6);
info->smac[0] = (u8)((qword6 >> 40) & 0xFF);
info->smac[1] = (u8)((qword6 >> 32) & 0xFF);
info->smac[2] = (u8)((qword6 >> 24) & 0xFF);
info->smac[3] = (u8)((qword6 >> 16) & 0xFF);
info->smac[4] = (u8)((qword6 >> 8) & 0xFF);
info->smac[5] = (u8)(qword6 & 0xFF);
}
}
if (cq->dev->hw_attrs.uk_attrs.hw_rev == IRDMA_GEN_1) {
info->vlan_valid = (bool)FIELD_GET(IRDMA_VLAN_TAG_VALID, qword3);
info->l4proto = (u8)FIELD_GET(IRDMA_UDA_L4PROTO, qword2);
info->l3proto = (u8)FIELD_GET(IRDMA_UDA_L3PROTO, qword2);
}
info->payload_len = (u32)FIELD_GET(IRDMACQ_PAYLDLEN, qword0);
}
return 0;
}
/**
* irdma_puda_poll_cmpl - processes completion for cq
* @dev: iwarp device
* @cq: cq getting interrupt
* @compl_err: return any completion err
*/
int irdma_puda_poll_cmpl(struct irdma_sc_dev *dev, struct irdma_sc_cq *cq,
u32 *compl_err)
{
struct irdma_qp_uk *qp;
struct irdma_cq_uk *cq_uk = &cq->cq_uk;
struct irdma_puda_cmpl_info info = {};
int ret = 0;
struct irdma_puda_buf *buf;
struct irdma_puda_rsrc *rsrc;
u8 cq_type = cq->cq_type;
unsigned long flags;
if (cq_type == IRDMA_CQ_TYPE_ILQ || cq_type == IRDMA_CQ_TYPE_IEQ) {
rsrc = (cq_type == IRDMA_CQ_TYPE_ILQ) ? cq->vsi->ilq :
cq->vsi->ieq;
} else {
ibdev_dbg(to_ibdev(dev), "PUDA: qp_type error\n");
return -EINVAL;
}
ret = irdma_puda_poll_info(cq, &info);
*compl_err = info.compl_error;
if (ret == -ENOENT)
return ret;
if (ret)
goto done;
qp = info.qp;
if (!qp || !rsrc) {
ret = -EFAULT;
goto done;
}
if (qp->qp_id != rsrc->qp_id) {
ret = -EFAULT;
goto done;
}
if (info.q_type == IRDMA_CQE_QTYPE_RQ) {
buf = (struct irdma_puda_buf *)(uintptr_t)
qp->rq_wrid_array[info.wqe_idx];
/* reusing so synch the buffer for CPU use */
dma_sync_single_for_cpu(dev->hw->device, buf->mem.pa,
buf->mem.size, DMA_BIDIRECTIONAL);
/* Get all the tcpip information in the buf header */
ret = irdma_puda_get_tcpip_info(&info, buf);
if (ret) {
rsrc->stats_rcvd_pkt_err++;
if (cq_type == IRDMA_CQ_TYPE_ILQ) {
irdma_ilq_putback_rcvbuf(&rsrc->qp, buf,
info.wqe_idx);
} else {
irdma_puda_ret_bufpool(rsrc, buf);
irdma_puda_replenish_rq(rsrc, false);
}
goto done;
}
rsrc->stats_pkt_rcvd++;
rsrc->compl_rxwqe_idx = info.wqe_idx;
ibdev_dbg(to_ibdev(dev), "PUDA: RQ completion\n");
rsrc->receive(rsrc->vsi, buf);
if (cq_type == IRDMA_CQ_TYPE_ILQ)
irdma_ilq_putback_rcvbuf(&rsrc->qp, buf, info.wqe_idx);
else
irdma_puda_replenish_rq(rsrc, false);
} else {
ibdev_dbg(to_ibdev(dev), "PUDA: SQ completion\n");
buf = (struct irdma_puda_buf *)(uintptr_t)
qp->sq_wrtrk_array[info.wqe_idx].wrid;
/* reusing so synch the buffer for CPU use */
dma_sync_single_for_cpu(dev->hw->device, buf->mem.pa,
buf->mem.size, DMA_BIDIRECTIONAL);
IRDMA_RING_SET_TAIL(qp->sq_ring, info.wqe_idx);
rsrc->xmit_complete(rsrc->vsi, buf);
spin_lock_irqsave(&rsrc->bufpool_lock, flags);
rsrc->tx_wqe_avail_cnt++;
spin_unlock_irqrestore(&rsrc->bufpool_lock, flags);
if (!list_empty(&rsrc->txpend))
irdma_puda_send_buf(rsrc, NULL);
}
done:
IRDMA_RING_MOVE_HEAD_NOCHECK(cq_uk->cq_ring);
if (!IRDMA_RING_CURRENT_HEAD(cq_uk->cq_ring))
cq_uk->polarity = !cq_uk->polarity;
/* update cq tail in cq shadow memory also */
IRDMA_RING_MOVE_TAIL(cq_uk->cq_ring);
set_64bit_val(cq_uk->shadow_area, 0,
IRDMA_RING_CURRENT_HEAD(cq_uk->cq_ring));
return ret;
}
/**
* irdma_puda_send - complete send wqe for transmit
* @qp: puda qp for send
* @info: buffer information for transmit
*/
int irdma_puda_send(struct irdma_sc_qp *qp, struct irdma_puda_send_info *info)
{
__le64 *wqe;
u32 iplen, l4len;
u64 hdr[2];
u32 wqe_idx;
u8 iipt;
/* number of 32 bits DWORDS in header */
l4len = info->tcplen >> 2;
if (info->ipv4) {
iipt = 3;
iplen = 5;
} else {
iipt = 1;
iplen = 10;
}
wqe = irdma_puda_get_next_send_wqe(&qp->qp_uk, &wqe_idx);
if (!wqe)
return -ENOMEM;
qp->qp_uk.sq_wrtrk_array[wqe_idx].wrid = (uintptr_t)info->scratch;
/* Third line of WQE descriptor */
/* maclen is in words */
if (qp->dev->hw_attrs.uk_attrs.hw_rev >= IRDMA_GEN_2) {
hdr[0] = 0; /* Dest_QPN and Dest_QKey only for UD */
hdr[1] = FIELD_PREP(IRDMA_UDA_QPSQ_OPCODE, IRDMA_OP_TYPE_SEND) |
FIELD_PREP(IRDMA_UDA_QPSQ_L4LEN, l4len) |
FIELD_PREP(IRDMAQPSQ_AHID, info->ah_id) |
FIELD_PREP(IRDMA_UDA_QPSQ_SIGCOMPL, 1) |
FIELD_PREP(IRDMA_UDA_QPSQ_VALID,
qp->qp_uk.swqe_polarity);
/* Forth line of WQE descriptor */
set_64bit_val(wqe, 0, info->paddr);
set_64bit_val(wqe, 8,
FIELD_PREP(IRDMAQPSQ_FRAG_LEN, info->len) |
FIELD_PREP(IRDMA_UDA_QPSQ_VALID, qp->qp_uk.swqe_polarity));
} else {
hdr[0] = FIELD_PREP(IRDMA_UDA_QPSQ_MACLEN, info->maclen >> 1) |
FIELD_PREP(IRDMA_UDA_QPSQ_IPLEN, iplen) |
FIELD_PREP(IRDMA_UDA_QPSQ_L4T, 1) |
FIELD_PREP(IRDMA_UDA_QPSQ_IIPT, iipt) |
FIELD_PREP(IRDMA_GEN1_UDA_QPSQ_L4LEN, l4len);
hdr[1] = FIELD_PREP(IRDMA_UDA_QPSQ_OPCODE, IRDMA_OP_TYPE_SEND) |
FIELD_PREP(IRDMA_UDA_QPSQ_SIGCOMPL, 1) |
FIELD_PREP(IRDMA_UDA_QPSQ_DOLOOPBACK, info->do_lpb) |
FIELD_PREP(IRDMA_UDA_QPSQ_VALID, qp->qp_uk.swqe_polarity);
/* Forth line of WQE descriptor */
set_64bit_val(wqe, 0, info->paddr);
set_64bit_val(wqe, 8,
FIELD_PREP(IRDMAQPSQ_GEN1_FRAG_LEN, info->len));
}
set_64bit_val(wqe, 16, hdr[0]);
dma_wmb(); /* make sure WQE is written before valid bit is set */
set_64bit_val(wqe, 24, hdr[1]);
print_hex_dump_debug("PUDA: PUDA SEND WQE", DUMP_PREFIX_OFFSET, 16, 8,
wqe, 32, false);
irdma_uk_qp_post_wr(&qp->qp_uk);
return 0;
}
/**
* irdma_puda_send_buf - transmit puda buffer
* @rsrc: resource to use for buffer
* @buf: puda buffer to transmit
*/
void irdma_puda_send_buf(struct irdma_puda_rsrc *rsrc,
struct irdma_puda_buf *buf)
{
struct irdma_puda_send_info info;
int ret = 0;
unsigned long flags;
spin_lock_irqsave(&rsrc->bufpool_lock, flags);
/* if no wqe available or not from a completion and we have
* pending buffers, we must queue new buffer
*/
if (!rsrc->tx_wqe_avail_cnt || (buf && !list_empty(&rsrc->txpend))) {
list_add_tail(&buf->list, &rsrc->txpend);
spin_unlock_irqrestore(&rsrc->bufpool_lock, flags);
rsrc->stats_sent_pkt_q++;
if (rsrc->type == IRDMA_PUDA_RSRC_TYPE_ILQ)
ibdev_dbg(to_ibdev(rsrc->dev),
"PUDA: adding to txpend\n");
return;
}
rsrc->tx_wqe_avail_cnt--;
/* if we are coming from a completion and have pending buffers
* then Get one from pending list
*/
if (!buf) {
buf = irdma_puda_get_listbuf(&rsrc->txpend);
if (!buf)
goto done;
}
info.scratch = buf;
info.paddr = buf->mem.pa;
info.len = buf->totallen;
info.tcplen = buf->tcphlen;
info.ipv4 = buf->ipv4;
if (rsrc->dev->hw_attrs.uk_attrs.hw_rev >= IRDMA_GEN_2) {
info.ah_id = buf->ah_id;
} else {
info.maclen = buf->maclen;
info.do_lpb = buf->do_lpb;
}
/* Synch buffer for use by device */
dma_sync_single_for_cpu(rsrc->dev->hw->device, buf->mem.pa,
buf->mem.size, DMA_BIDIRECTIONAL);
ret = irdma_puda_send(&rsrc->qp, &info);
if (ret) {
rsrc->tx_wqe_avail_cnt++;
rsrc->stats_sent_pkt_q++;
list_add(&buf->list, &rsrc->txpend);
if (rsrc->type == IRDMA_PUDA_RSRC_TYPE_ILQ)
ibdev_dbg(to_ibdev(rsrc->dev),
"PUDA: adding to puda_send\n");
} else {
rsrc->stats_pkt_sent++;
}
done:
spin_unlock_irqrestore(&rsrc->bufpool_lock, flags);
}
/**
* irdma_puda_qp_setctx - during init, set qp's context
* @rsrc: qp's resource
*/
static void irdma_puda_qp_setctx(struct irdma_puda_rsrc *rsrc)
{
struct irdma_sc_qp *qp = &rsrc->qp;
__le64 *qp_ctx = qp->hw_host_ctx;
set_64bit_val(qp_ctx, 8, qp->sq_pa);
set_64bit_val(qp_ctx, 16, qp->rq_pa);
set_64bit_val(qp_ctx, 24,
FIELD_PREP(IRDMAQPC_RQSIZE, qp->hw_rq_size) |
FIELD_PREP(IRDMAQPC_SQSIZE, qp->hw_sq_size));
set_64bit_val(qp_ctx, 48,
FIELD_PREP(IRDMAQPC_SNDMSS, rsrc->buf_size));
set_64bit_val(qp_ctx, 56, 0);
if (qp->dev->hw_attrs.uk_attrs.hw_rev == IRDMA_GEN_1)
set_64bit_val(qp_ctx, 64, 1);
set_64bit_val(qp_ctx, 136,
FIELD_PREP(IRDMAQPC_TXCQNUM, rsrc->cq_id) |
FIELD_PREP(IRDMAQPC_RXCQNUM, rsrc->cq_id));
set_64bit_val(qp_ctx, 144,
FIELD_PREP(IRDMAQPC_STAT_INDEX, rsrc->stats_idx));
set_64bit_val(qp_ctx, 160,
FIELD_PREP(IRDMAQPC_PRIVEN, 1) |
FIELD_PREP(IRDMAQPC_USESTATSINSTANCE, rsrc->stats_idx_valid));
set_64bit_val(qp_ctx, 168,
FIELD_PREP(IRDMAQPC_QPCOMPCTX, (uintptr_t)qp));
set_64bit_val(qp_ctx, 176,
FIELD_PREP(IRDMAQPC_SQTPHVAL, qp->sq_tph_val) |
FIELD_PREP(IRDMAQPC_RQTPHVAL, qp->rq_tph_val) |
FIELD_PREP(IRDMAQPC_QSHANDLE, qp->qs_handle));
print_hex_dump_debug("PUDA: PUDA QP CONTEXT", DUMP_PREFIX_OFFSET, 16,
8, qp_ctx, IRDMA_QP_CTX_SIZE, false);
}
/**
* irdma_puda_qp_wqe - setup wqe for qp create
* @dev: Device
* @qp: Resource qp
*/
static int irdma_puda_qp_wqe(struct irdma_sc_dev *dev, struct irdma_sc_qp *qp)
{
struct irdma_sc_cqp *cqp;
__le64 *wqe;
u64 hdr;
struct irdma_ccq_cqe_info compl_info;
int status = 0;
cqp = dev->cqp;
wqe = irdma_sc_cqp_get_next_send_wqe(cqp, 0);
if (!wqe)
return -ENOMEM;
set_64bit_val(wqe, 16, qp->hw_host_ctx_pa);
set_64bit_val(wqe, 40, qp->shadow_area_pa);
hdr = qp->qp_uk.qp_id |
FIELD_PREP(IRDMA_CQPSQ_OPCODE, IRDMA_CQP_OP_CREATE_QP) |
FIELD_PREP(IRDMA_CQPSQ_QP_QPTYPE, IRDMA_QP_TYPE_UDA) |
FIELD_PREP(IRDMA_CQPSQ_QP_CQNUMVALID, 1) |
FIELD_PREP(IRDMA_CQPSQ_QP_NEXTIWSTATE, 2) |
FIELD_PREP(IRDMA_CQPSQ_WQEVALID, cqp->polarity);
dma_wmb(); /* make sure WQE is written before valid bit is set */
set_64bit_val(wqe, 24, hdr);
print_hex_dump_debug("PUDA: PUDA QP CREATE", DUMP_PREFIX_OFFSET, 16,
8, wqe, 40, false);
irdma_sc_cqp_post_sq(cqp);
status = irdma_sc_poll_for_cqp_op_done(dev->cqp, IRDMA_CQP_OP_CREATE_QP,
&compl_info);
return status;
}
/**
* irdma_puda_qp_create - create qp for resource
* @rsrc: resource to use for buffer
*/
static int irdma_puda_qp_create(struct irdma_puda_rsrc *rsrc)
{
struct irdma_sc_qp *qp = &rsrc->qp;
struct irdma_qp_uk *ukqp = &qp->qp_uk;
int ret = 0;
u32 sq_size, rq_size;
struct irdma_dma_mem *mem;
sq_size = rsrc->sq_size * IRDMA_QP_WQE_MIN_SIZE;
rq_size = rsrc->rq_size * IRDMA_QP_WQE_MIN_SIZE;
rsrc->qpmem.size = ALIGN((sq_size + rq_size + (IRDMA_SHADOW_AREA_SIZE << 3) + IRDMA_QP_CTX_SIZE),
IRDMA_HW_PAGE_SIZE);
rsrc->qpmem.va = dma_alloc_coherent(rsrc->dev->hw->device,
rsrc->qpmem.size, &rsrc->qpmem.pa,
GFP_KERNEL);
if (!rsrc->qpmem.va)
return -ENOMEM;
mem = &rsrc->qpmem;
memset(mem->va, 0, rsrc->qpmem.size);
qp->hw_sq_size = irdma_get_encoded_wqe_size(rsrc->sq_size, IRDMA_QUEUE_TYPE_SQ_RQ);
qp->hw_rq_size = irdma_get_encoded_wqe_size(rsrc->rq_size, IRDMA_QUEUE_TYPE_SQ_RQ);
qp->pd = &rsrc->sc_pd;
qp->qp_uk.qp_type = IRDMA_QP_TYPE_UDA;
qp->dev = rsrc->dev;
qp->qp_uk.back_qp = rsrc;
qp->sq_pa = mem->pa;
qp->rq_pa = qp->sq_pa + sq_size;
qp->vsi = rsrc->vsi;
ukqp->sq_base = mem->va;
ukqp->rq_base = &ukqp->sq_base[rsrc->sq_size];
ukqp->shadow_area = ukqp->rq_base[rsrc->rq_size].elem;
ukqp->uk_attrs = &qp->dev->hw_attrs.uk_attrs;
qp->shadow_area_pa = qp->rq_pa + rq_size;
qp->hw_host_ctx = ukqp->shadow_area + IRDMA_SHADOW_AREA_SIZE;
qp->hw_host_ctx_pa = qp->shadow_area_pa + (IRDMA_SHADOW_AREA_SIZE << 3);
qp->push_idx = IRDMA_INVALID_PUSH_PAGE_INDEX;
ukqp->qp_id = rsrc->qp_id;
ukqp->sq_wrtrk_array = rsrc->sq_wrtrk_array;
ukqp->rq_wrid_array = rsrc->rq_wrid_array;
ukqp->sq_size = rsrc->sq_size;
ukqp->rq_size = rsrc->rq_size;
IRDMA_RING_INIT(ukqp->sq_ring, ukqp->sq_size);
IRDMA_RING_INIT(ukqp->initial_ring, ukqp->sq_size);
IRDMA_RING_INIT(ukqp->rq_ring, ukqp->rq_size);
ukqp->wqe_alloc_db = qp->pd->dev->wqe_alloc_db;
ret = rsrc->dev->ws_add(qp->vsi, qp->user_pri);
if (ret) {
dma_free_coherent(rsrc->dev->hw->device, rsrc->qpmem.size,
rsrc->qpmem.va, rsrc->qpmem.pa);
rsrc->qpmem.va = NULL;
return ret;
}
irdma_qp_add_qos(qp);
irdma_puda_qp_setctx(rsrc);
if (rsrc->dev->ceq_valid)
ret = irdma_cqp_qp_create_cmd(rsrc->dev, qp);
else
ret = irdma_puda_qp_wqe(rsrc->dev, qp);
if (ret) {
irdma_qp_rem_qos(qp);
rsrc->dev->ws_remove(qp->vsi, qp->user_pri);
dma_free_coherent(rsrc->dev->hw->device, rsrc->qpmem.size,
rsrc->qpmem.va, rsrc->qpmem.pa);
rsrc->qpmem.va = NULL;
}
return ret;
}
/**
* irdma_puda_cq_wqe - setup wqe for CQ create
* @dev: Device
* @cq: resource for cq
*/
static int irdma_puda_cq_wqe(struct irdma_sc_dev *dev, struct irdma_sc_cq *cq)
{
__le64 *wqe;
struct irdma_sc_cqp *cqp;
u64 hdr;
struct irdma_ccq_cqe_info compl_info;
int status = 0;
cqp = dev->cqp;
wqe = irdma_sc_cqp_get_next_send_wqe(cqp, 0);
if (!wqe)
return -ENOMEM;
set_64bit_val(wqe, 0, cq->cq_uk.cq_size);
set_64bit_val(wqe, 8, (uintptr_t)cq >> 1);
set_64bit_val(wqe, 16,
FIELD_PREP(IRDMA_CQPSQ_CQ_SHADOW_READ_THRESHOLD, cq->shadow_read_threshold));
set_64bit_val(wqe, 32, cq->cq_pa);
set_64bit_val(wqe, 40, cq->shadow_area_pa);
set_64bit_val(wqe, 56,
FIELD_PREP(IRDMA_CQPSQ_TPHVAL, cq->tph_val) |
FIELD_PREP(IRDMA_CQPSQ_VSIIDX, cq->vsi->vsi_idx));
hdr = cq->cq_uk.cq_id |
FIELD_PREP(IRDMA_CQPSQ_OPCODE, IRDMA_CQP_OP_CREATE_CQ) |
FIELD_PREP(IRDMA_CQPSQ_CQ_CHKOVERFLOW, 1) |
FIELD_PREP(IRDMA_CQPSQ_CQ_ENCEQEMASK, 1) |
FIELD_PREP(IRDMA_CQPSQ_CQ_CEQIDVALID, 1) |
FIELD_PREP(IRDMA_CQPSQ_WQEVALID, cqp->polarity);
dma_wmb(); /* make sure WQE is written before valid bit is set */
set_64bit_val(wqe, 24, hdr);
print_hex_dump_debug("PUDA: PUDA CREATE CQ", DUMP_PREFIX_OFFSET, 16,
8, wqe, IRDMA_CQP_WQE_SIZE * 8, false);
irdma_sc_cqp_post_sq(dev->cqp);
status = irdma_sc_poll_for_cqp_op_done(dev->cqp, IRDMA_CQP_OP_CREATE_CQ,
&compl_info);
if (!status) {
struct irdma_sc_ceq *ceq = dev->ceq[0];
if (ceq && ceq->reg_cq)
status = irdma_sc_add_cq_ctx(ceq, cq);
}
return status;
}
/**
* irdma_puda_cq_create - create cq for resource
* @rsrc: resource for which cq to create
*/
static int irdma_puda_cq_create(struct irdma_puda_rsrc *rsrc)
{
struct irdma_sc_dev *dev = rsrc->dev;
struct irdma_sc_cq *cq = &rsrc->cq;
int ret = 0;
u32 cqsize;
struct irdma_dma_mem *mem;
struct irdma_cq_init_info info = {};
struct irdma_cq_uk_init_info *init_info = &info.cq_uk_init_info;
cq->vsi = rsrc->vsi;
cqsize = rsrc->cq_size * (sizeof(struct irdma_cqe));
rsrc->cqmem.size = ALIGN(cqsize + sizeof(struct irdma_cq_shadow_area),
IRDMA_CQ0_ALIGNMENT);
rsrc->cqmem.va = dma_alloc_coherent(dev->hw->device, rsrc->cqmem.size,
&rsrc->cqmem.pa, GFP_KERNEL);
if (!rsrc->cqmem.va)
return -ENOMEM;
mem = &rsrc->cqmem;
info.dev = dev;
info.type = (rsrc->type == IRDMA_PUDA_RSRC_TYPE_ILQ) ?
IRDMA_CQ_TYPE_ILQ : IRDMA_CQ_TYPE_IEQ;
info.shadow_read_threshold = rsrc->cq_size >> 2;
info.cq_base_pa = mem->pa;
info.shadow_area_pa = mem->pa + cqsize;
init_info->cq_base = mem->va;
init_info->shadow_area = (__le64 *)((u8 *)mem->va + cqsize);
init_info->cq_size = rsrc->cq_size;
init_info->cq_id = rsrc->cq_id;
info.ceqe_mask = true;
info.ceq_id_valid = true;
info.vsi = rsrc->vsi;
ret = irdma_sc_cq_init(cq, &info);
if (ret)
goto error;
if (rsrc->dev->ceq_valid)
ret = irdma_cqp_cq_create_cmd(dev, cq);
else
ret = irdma_puda_cq_wqe(dev, cq);
error:
if (ret) {
dma_free_coherent(dev->hw->device, rsrc->cqmem.size,
rsrc->cqmem.va, rsrc->cqmem.pa);
rsrc->cqmem.va = NULL;
}
return ret;
}
/**
* irdma_puda_free_qp - free qp for resource
* @rsrc: resource for which qp to free
*/
static void irdma_puda_free_qp(struct irdma_puda_rsrc *rsrc)
{
int ret;
struct irdma_ccq_cqe_info compl_info;
struct irdma_sc_dev *dev = rsrc->dev;
if (rsrc->dev->ceq_valid) {
irdma_cqp_qp_destroy_cmd(dev, &rsrc->qp);
rsrc->dev->ws_remove(rsrc->qp.vsi, rsrc->qp.user_pri);
return;
}
ret = irdma_sc_qp_destroy(&rsrc->qp, 0, false, true, true);
if (ret)
ibdev_dbg(to_ibdev(dev),
"PUDA: error puda qp destroy wqe, status = %d\n",
ret);
if (!ret) {
ret = irdma_sc_poll_for_cqp_op_done(dev->cqp, IRDMA_CQP_OP_DESTROY_QP,
&compl_info);
if (ret)
ibdev_dbg(to_ibdev(dev),
"PUDA: error puda qp destroy failed, status = %d\n",
ret);
}
rsrc->dev->ws_remove(rsrc->qp.vsi, rsrc->qp.user_pri);
}
/**
* irdma_puda_free_cq - free cq for resource
* @rsrc: resource for which cq to free
*/
static void irdma_puda_free_cq(struct irdma_puda_rsrc *rsrc)
{
int ret;
struct irdma_ccq_cqe_info compl_info;
struct irdma_sc_dev *dev = rsrc->dev;
if (rsrc->dev->ceq_valid) {
irdma_cqp_cq_destroy_cmd(dev, &rsrc->cq);
return;
}
ret = irdma_sc_cq_destroy(&rsrc->cq, 0, true);
if (ret)
ibdev_dbg(to_ibdev(dev), "PUDA: error ieq cq destroy\n");
if (!ret) {
ret = irdma_sc_poll_for_cqp_op_done(dev->cqp, IRDMA_CQP_OP_DESTROY_CQ,
&compl_info);
if (ret)
ibdev_dbg(to_ibdev(dev),
"PUDA: error ieq qp destroy done\n");
}
}
/**
* irdma_puda_dele_rsrc - delete all resources during close
* @vsi: VSI structure of device
* @type: type of resource to dele
* @reset: true if reset chip
*/
void irdma_puda_dele_rsrc(struct irdma_sc_vsi *vsi, enum puda_rsrc_type type,
bool reset)
{
struct irdma_sc_dev *dev = vsi->dev;
struct irdma_puda_rsrc *rsrc;
struct irdma_puda_buf *buf = NULL;
struct irdma_puda_buf *nextbuf = NULL;
struct irdma_virt_mem *vmem;
struct irdma_sc_ceq *ceq;
ceq = vsi->dev->ceq[0];
switch (type) {
case IRDMA_PUDA_RSRC_TYPE_ILQ:
rsrc = vsi->ilq;
vmem = &vsi->ilq_mem;
vsi->ilq = NULL;
if (ceq && ceq->reg_cq)
irdma_sc_remove_cq_ctx(ceq, &rsrc->cq);
break;
case IRDMA_PUDA_RSRC_TYPE_IEQ:
rsrc = vsi->ieq;
vmem = &vsi->ieq_mem;
vsi->ieq = NULL;
if (ceq && ceq->reg_cq)
irdma_sc_remove_cq_ctx(ceq, &rsrc->cq);
break;
default:
ibdev_dbg(to_ibdev(dev), "PUDA: error resource type = 0x%x\n",
type);
return;
}
switch (rsrc->cmpl) {
case PUDA_HASH_CRC_COMPLETE:
irdma_free_hash_desc(rsrc->hash_desc);
fallthrough;
case PUDA_QP_CREATED:
irdma_qp_rem_qos(&rsrc->qp);
if (!reset)
irdma_puda_free_qp(rsrc);
dma_free_coherent(dev->hw->device, rsrc->qpmem.size,
rsrc->qpmem.va, rsrc->qpmem.pa);
rsrc->qpmem.va = NULL;
fallthrough;
case PUDA_CQ_CREATED:
if (!reset)
irdma_puda_free_cq(rsrc);
dma_free_coherent(dev->hw->device, rsrc->cqmem.size,
rsrc->cqmem.va, rsrc->cqmem.pa);
rsrc->cqmem.va = NULL;
break;
default:
ibdev_dbg(to_ibdev(rsrc->dev), "PUDA: error no resources\n");
break;
}
/* Free all allocated puda buffers for both tx and rx */
buf = rsrc->alloclist;
while (buf) {
nextbuf = buf->next;
irdma_puda_dele_buf(dev, buf);
buf = nextbuf;
rsrc->alloc_buf_count--;
}
kfree(vmem->va);
}
/**
* irdma_puda_allocbufs - allocate buffers for resource
* @rsrc: resource for buffer allocation
* @count: number of buffers to create
*/
static int irdma_puda_allocbufs(struct irdma_puda_rsrc *rsrc, u32 count)
{
u32 i;
struct irdma_puda_buf *buf;
struct irdma_puda_buf *nextbuf;
for (i = 0; i < count; i++) {
buf = irdma_puda_alloc_buf(rsrc->dev, rsrc->buf_size);
if (!buf) {
rsrc->stats_buf_alloc_fail++;
return -ENOMEM;
}
irdma_puda_ret_bufpool(rsrc, buf);
rsrc->alloc_buf_count++;
if (!rsrc->alloclist) {
rsrc->alloclist = buf;
} else {
nextbuf = rsrc->alloclist;
rsrc->alloclist = buf;
buf->next = nextbuf;
}
}
rsrc->avail_buf_count = rsrc->alloc_buf_count;
return 0;
}
/**
* irdma_puda_create_rsrc - create resource (ilq or ieq)
* @vsi: sc VSI struct
* @info: resource information
*/
int irdma_puda_create_rsrc(struct irdma_sc_vsi *vsi,
struct irdma_puda_rsrc_info *info)
{
struct irdma_sc_dev *dev = vsi->dev;
int ret = 0;
struct irdma_puda_rsrc *rsrc;
u32 pudasize;
u32 sqwridsize, rqwridsize;
struct irdma_virt_mem *vmem;
info->count = 1;
pudasize = sizeof(struct irdma_puda_rsrc);
sqwridsize = info->sq_size * sizeof(struct irdma_sq_uk_wr_trk_info);
rqwridsize = info->rq_size * 8;
switch (info->type) {
case IRDMA_PUDA_RSRC_TYPE_ILQ:
vmem = &vsi->ilq_mem;
break;
case IRDMA_PUDA_RSRC_TYPE_IEQ:
vmem = &vsi->ieq_mem;
break;
default:
return -EOPNOTSUPP;
}
vmem->size = pudasize + sqwridsize + rqwridsize;
vmem->va = kzalloc(vmem->size, GFP_KERNEL);
if (!vmem->va)
return -ENOMEM;
rsrc = vmem->va;
spin_lock_init(&rsrc->bufpool_lock);
switch (info->type) {
case IRDMA_PUDA_RSRC_TYPE_ILQ:
vsi->ilq = vmem->va;
vsi->ilq_count = info->count;
rsrc->receive = info->receive;
rsrc->xmit_complete = info->xmit_complete;
break;
case IRDMA_PUDA_RSRC_TYPE_IEQ:
vsi->ieq_count = info->count;
vsi->ieq = vmem->va;
rsrc->receive = irdma_ieq_receive;
rsrc->xmit_complete = irdma_ieq_tx_compl;
break;
default:
return -EOPNOTSUPP;
}
rsrc->type = info->type;
rsrc->sq_wrtrk_array = (struct irdma_sq_uk_wr_trk_info *)
((u8 *)vmem->va + pudasize);
rsrc->rq_wrid_array = (u64 *)((u8 *)vmem->va + pudasize + sqwridsize);
/* Initialize all ieq lists */
INIT_LIST_HEAD(&rsrc->bufpool);
INIT_LIST_HEAD(&rsrc->txpend);
rsrc->tx_wqe_avail_cnt = info->sq_size - 1;
irdma_sc_pd_init(dev, &rsrc->sc_pd, info->pd_id, info->abi_ver);
rsrc->qp_id = info->qp_id;
rsrc->cq_id = info->cq_id;
rsrc->sq_size = info->sq_size;
rsrc->rq_size = info->rq_size;
rsrc->cq_size = info->rq_size + info->sq_size;
if (dev->hw_attrs.uk_attrs.hw_rev >= IRDMA_GEN_2) {
if (rsrc->type == IRDMA_PUDA_RSRC_TYPE_ILQ)
rsrc->cq_size += info->rq_size;
}
rsrc->buf_size = info->buf_size;
rsrc->dev = dev;
rsrc->vsi = vsi;
rsrc->stats_idx = info->stats_idx;
rsrc->stats_idx_valid = info->stats_idx_valid;
ret = irdma_puda_cq_create(rsrc);
if (!ret) {
rsrc->cmpl = PUDA_CQ_CREATED;
ret = irdma_puda_qp_create(rsrc);
}
if (ret) {
ibdev_dbg(to_ibdev(dev),
"PUDA: error qp_create type=%d, status=%d\n",
rsrc->type, ret);
goto error;
}
rsrc->cmpl = PUDA_QP_CREATED;
ret = irdma_puda_allocbufs(rsrc, info->tx_buf_cnt + info->rq_size);
if (ret) {
ibdev_dbg(to_ibdev(dev), "PUDA: error alloc_buf\n");
goto error;
}
rsrc->rxq_invalid_cnt = info->rq_size;
ret = irdma_puda_replenish_rq(rsrc, true);
if (ret)
goto error;
if (info->type == IRDMA_PUDA_RSRC_TYPE_IEQ) {
if (!irdma_init_hash_desc(&rsrc->hash_desc)) {
rsrc->check_crc = true;
rsrc->cmpl = PUDA_HASH_CRC_COMPLETE;
ret = 0;
}
}
irdma_sc_ccq_arm(&rsrc->cq);
return ret;
error:
irdma_puda_dele_rsrc(vsi, info->type, false);
return ret;
}
/**
* irdma_ilq_putback_rcvbuf - ilq buffer to put back on rq
* @qp: ilq's qp resource
* @buf: puda buffer for rcv q
* @wqe_idx: wqe index of completed rcvbuf
*/
static void irdma_ilq_putback_rcvbuf(struct irdma_sc_qp *qp,
struct irdma_puda_buf *buf, u32 wqe_idx)
{
__le64 *wqe;
u64 offset8, offset24;
/* Synch buffer for use by device */
dma_sync_single_for_device(qp->dev->hw->device, buf->mem.pa,
buf->mem.size, DMA_BIDIRECTIONAL);
wqe = qp->qp_uk.rq_base[wqe_idx].elem;
get_64bit_val(wqe, 24, &offset24);
if (qp->dev->hw_attrs.uk_attrs.hw_rev >= IRDMA_GEN_2) {
get_64bit_val(wqe, 8, &offset8);
if (offset24)
offset8 &= ~FIELD_PREP(IRDMAQPSQ_VALID, 1);
else
offset8 |= FIELD_PREP(IRDMAQPSQ_VALID, 1);
set_64bit_val(wqe, 8, offset8);
dma_wmb(); /* make sure WQE is written before valid bit is set */
}
if (offset24)
offset24 = 0;
else
offset24 = FIELD_PREP(IRDMAQPSQ_VALID, 1);
set_64bit_val(wqe, 24, offset24);
}
/**
* irdma_ieq_get_fpdu_len - get length of fpdu with or without marker
* @pfpdu: pointer to fpdu
* @datap: pointer to data in the buffer
* @rcv_seq: seqnum of the data buffer
*/
static u16 irdma_ieq_get_fpdu_len(struct irdma_pfpdu *pfpdu, u8 *datap,
u32 rcv_seq)
{
u32 marker_seq, end_seq, blk_start;
u8 marker_len = pfpdu->marker_len;
u16 total_len = 0;
u16 fpdu_len;
blk_start = (pfpdu->rcv_start_seq - rcv_seq) & (IRDMA_MRK_BLK_SZ - 1);
if (!blk_start) {
total_len = marker_len;
marker_seq = rcv_seq + IRDMA_MRK_BLK_SZ;
if (marker_len && *(u32 *)datap)
return 0;
} else {
marker_seq = rcv_seq + blk_start;
}
datap += total_len;
fpdu_len = ntohs(*(__be16 *)datap);
fpdu_len += IRDMA_IEQ_MPA_FRAMING;
fpdu_len = (fpdu_len + 3) & 0xfffc;
if (fpdu_len > pfpdu->max_fpdu_data)
return 0;
total_len += fpdu_len;
end_seq = rcv_seq + total_len;
while ((int)(marker_seq - end_seq) < 0) {
total_len += marker_len;
end_seq += marker_len;
marker_seq += IRDMA_MRK_BLK_SZ;
}
return total_len;
}
/**
* irdma_ieq_copy_to_txbuf - copydata from rcv buf to tx buf
* @buf: rcv buffer with partial
* @txbuf: tx buffer for sending back
* @buf_offset: rcv buffer offset to copy from
* @txbuf_offset: at offset in tx buf to copy
* @len: length of data to copy
*/
static void irdma_ieq_copy_to_txbuf(struct irdma_puda_buf *buf,
struct irdma_puda_buf *txbuf,
u16 buf_offset, u32 txbuf_offset, u32 len)
{
void *mem1 = (u8 *)buf->mem.va + buf_offset;
void *mem2 = (u8 *)txbuf->mem.va + txbuf_offset;
memcpy(mem2, mem1, len);
}
/**
* irdma_ieq_setup_tx_buf - setup tx buffer for partial handling
* @buf: reeive buffer with partial
* @txbuf: buffer to prepare
*/
static void irdma_ieq_setup_tx_buf(struct irdma_puda_buf *buf,
struct irdma_puda_buf *txbuf)
{
txbuf->tcphlen = buf->tcphlen;
txbuf->ipv4 = buf->ipv4;
if (buf->vsi->dev->hw_attrs.uk_attrs.hw_rev >= IRDMA_GEN_2) {
txbuf->hdrlen = txbuf->tcphlen;
irdma_ieq_copy_to_txbuf(buf, txbuf, IRDMA_TCP_OFFSET, 0,
txbuf->hdrlen);
} else {
txbuf->maclen = buf->maclen;
txbuf->hdrlen = buf->hdrlen;
irdma_ieq_copy_to_txbuf(buf, txbuf, 0, 0, buf->hdrlen);
}
}
/**
* irdma_ieq_check_first_buf - check if rcv buffer's seq is in range
* @buf: receive exception buffer
* @fps: first partial sequence number
*/
static void irdma_ieq_check_first_buf(struct irdma_puda_buf *buf, u32 fps)
{
u32 offset;
if (buf->seqnum < fps) {
offset = fps - buf->seqnum;
if (offset > buf->datalen)
return;
buf->data += offset;
buf->datalen -= (u16)offset;
buf->seqnum = fps;
}
}
/**
* irdma_ieq_compl_pfpdu - write txbuf with full fpdu
* @ieq: ieq resource
* @rxlist: ieq's received buffer list
* @pbufl: temporary list for buffers for fpddu
* @txbuf: tx buffer for fpdu
* @fpdu_len: total length of fpdu
*/
static void irdma_ieq_compl_pfpdu(struct irdma_puda_rsrc *ieq,
struct list_head *rxlist,
struct list_head *pbufl,
struct irdma_puda_buf *txbuf, u16 fpdu_len)
{
struct irdma_puda_buf *buf;
u32 nextseqnum;
u16 txoffset, bufoffset;
buf = irdma_puda_get_listbuf(pbufl);
if (!buf)
return;
nextseqnum = buf->seqnum + fpdu_len;
irdma_ieq_setup_tx_buf(buf, txbuf);
if (buf->vsi->dev->hw_attrs.uk_attrs.hw_rev >= IRDMA_GEN_2) {
txoffset = txbuf->hdrlen;
txbuf->totallen = txbuf->hdrlen + fpdu_len;
txbuf->data = (u8 *)txbuf->mem.va + txoffset;
} else {
txoffset = buf->hdrlen;
txbuf->totallen = buf->hdrlen + fpdu_len;
txbuf->data = (u8 *)txbuf->mem.va + buf->hdrlen;
}
bufoffset = (u16)(buf->data - (u8 *)buf->mem.va);
do {
if (buf->datalen >= fpdu_len) {
/* copied full fpdu */
irdma_ieq_copy_to_txbuf(buf, txbuf, bufoffset, txoffset,
fpdu_len);
buf->datalen -= fpdu_len;
buf->data += fpdu_len;
buf->seqnum = nextseqnum;
break;
}
/* copy partial fpdu */
irdma_ieq_copy_to_txbuf(buf, txbuf, bufoffset, txoffset,
buf->datalen);
txoffset += buf->datalen;
fpdu_len -= buf->datalen;
irdma_puda_ret_bufpool(ieq, buf);
buf = irdma_puda_get_listbuf(pbufl);
if (!buf)
return;
bufoffset = (u16)(buf->data - (u8 *)buf->mem.va);
} while (1);
/* last buffer on the list*/
if (buf->datalen)
list_add(&buf->list, rxlist);
else
irdma_puda_ret_bufpool(ieq, buf);
}
/**
* irdma_ieq_create_pbufl - create buffer list for single fpdu
* @pfpdu: pointer to fpdu
* @rxlist: resource list for receive ieq buffes
* @pbufl: temp. list for buffers for fpddu
* @buf: first receive buffer
* @fpdu_len: total length of fpdu
*/
static int irdma_ieq_create_pbufl(struct irdma_pfpdu *pfpdu,
struct list_head *rxlist,
struct list_head *pbufl,
struct irdma_puda_buf *buf, u16 fpdu_len)
{
int status = 0;
struct irdma_puda_buf *nextbuf;
u32 nextseqnum;
u16 plen = fpdu_len - buf->datalen;
bool done = false;
nextseqnum = buf->seqnum + buf->datalen;
do {
nextbuf = irdma_puda_get_listbuf(rxlist);
if (!nextbuf) {
status = -ENOBUFS;
break;
}
list_add_tail(&nextbuf->list, pbufl);
if (nextbuf->seqnum != nextseqnum) {
pfpdu->bad_seq_num++;
status = -ERANGE;
break;
}
if (nextbuf->datalen >= plen) {
done = true;
} else {
plen -= nextbuf->datalen;
nextseqnum = nextbuf->seqnum + nextbuf->datalen;
}
} while (!done);
return status;
}
/**
* irdma_ieq_handle_partial - process partial fpdu buffer
* @ieq: ieq resource
* @pfpdu: partial management per user qp
* @buf: receive buffer
* @fpdu_len: fpdu len in the buffer
*/
static int irdma_ieq_handle_partial(struct irdma_puda_rsrc *ieq,
struct irdma_pfpdu *pfpdu,
struct irdma_puda_buf *buf, u16 fpdu_len)
{
int status = 0;
u8 *crcptr;
u32 mpacrc;
u32 seqnum = buf->seqnum;
struct list_head pbufl; /* partial buffer list */
struct irdma_puda_buf *txbuf = NULL;
struct list_head *rxlist = &pfpdu->rxlist;
ieq->partials_handled++;
INIT_LIST_HEAD(&pbufl);
list_add(&buf->list, &pbufl);
status = irdma_ieq_create_pbufl(pfpdu, rxlist, &pbufl, buf, fpdu_len);
if (status)
goto error;
txbuf = irdma_puda_get_bufpool(ieq);
if (!txbuf) {
pfpdu->no_tx_bufs++;
status = -ENOBUFS;
goto error;
}
irdma_ieq_compl_pfpdu(ieq, rxlist, &pbufl, txbuf, fpdu_len);
irdma_ieq_update_tcpip_info(txbuf, fpdu_len, seqnum);
crcptr = txbuf->data + fpdu_len - 4;
mpacrc = *(u32 *)crcptr;
if (ieq->check_crc) {
status = irdma_ieq_check_mpacrc(ieq->hash_desc, txbuf->data,
(fpdu_len - 4), mpacrc);
if (status) {
ibdev_dbg(to_ibdev(ieq->dev), "IEQ: error bad crc\n");
goto error;
}
}
print_hex_dump_debug("IEQ: IEQ TX BUFFER", DUMP_PREFIX_OFFSET, 16, 8,
txbuf->mem.va, txbuf->totallen, false);
if (ieq->dev->hw_attrs.uk_attrs.hw_rev >= IRDMA_GEN_2)
txbuf->ah_id = pfpdu->ah->ah_info.ah_idx;
txbuf->do_lpb = true;
irdma_puda_send_buf(ieq, txbuf);
pfpdu->rcv_nxt = seqnum + fpdu_len;
return status;
error:
while (!list_empty(&pbufl)) {
buf = list_last_entry(&pbufl, struct irdma_puda_buf, list);
list_move(&buf->list, rxlist);
}
if (txbuf)
irdma_puda_ret_bufpool(ieq, txbuf);
return status;
}
/**
* irdma_ieq_process_buf - process buffer rcvd for ieq
* @ieq: ieq resource
* @pfpdu: partial management per user qp
* @buf: receive buffer
*/
static int irdma_ieq_process_buf(struct irdma_puda_rsrc *ieq,
struct irdma_pfpdu *pfpdu,
struct irdma_puda_buf *buf)
{
u16 fpdu_len = 0;
u16 datalen = buf->datalen;
u8 *datap = buf->data;
u8 *crcptr;
u16 ioffset = 0;
u32 mpacrc;
u32 seqnum = buf->seqnum;
u16 len = 0;
u16 full = 0;
bool partial = false;
struct irdma_puda_buf *txbuf;
struct list_head *rxlist = &pfpdu->rxlist;
int ret = 0;
ioffset = (u16)(buf->data - (u8 *)buf->mem.va);
while (datalen) {
fpdu_len = irdma_ieq_get_fpdu_len(pfpdu, datap, buf->seqnum);
if (!fpdu_len) {
ibdev_dbg(to_ibdev(ieq->dev),
"IEQ: error bad fpdu len\n");
list_add(&buf->list, rxlist);
return -EINVAL;
}
if (datalen < fpdu_len) {
partial = true;
break;
}
crcptr = datap + fpdu_len - 4;
mpacrc = *(u32 *)crcptr;
if (ieq->check_crc)
ret = irdma_ieq_check_mpacrc(ieq->hash_desc, datap,
fpdu_len - 4, mpacrc);
if (ret) {
list_add(&buf->list, rxlist);
ibdev_dbg(to_ibdev(ieq->dev),
"ERR: IRDMA_ERR_MPA_CRC\n");
return -EINVAL;
}
full++;
pfpdu->fpdu_processed++;
ieq->fpdu_processed++;
datap += fpdu_len;
len += fpdu_len;
datalen -= fpdu_len;
}
if (full) {
/* copy full pdu's in the txbuf and send them out */
txbuf = irdma_puda_get_bufpool(ieq);
if (!txbuf) {
pfpdu->no_tx_bufs++;
list_add(&buf->list, rxlist);
return -ENOBUFS;
}
/* modify txbuf's buffer header */
irdma_ieq_setup_tx_buf(buf, txbuf);
/* copy full fpdu's to new buffer */
if (ieq->dev->hw_attrs.uk_attrs.hw_rev >= IRDMA_GEN_2) {
irdma_ieq_copy_to_txbuf(buf, txbuf, ioffset,
txbuf->hdrlen, len);
txbuf->totallen = txbuf->hdrlen + len;
txbuf->ah_id = pfpdu->ah->ah_info.ah_idx;
} else {
irdma_ieq_copy_to_txbuf(buf, txbuf, ioffset,
buf->hdrlen, len);
txbuf->totallen = buf->hdrlen + len;
}
irdma_ieq_update_tcpip_info(txbuf, len, buf->seqnum);
print_hex_dump_debug("IEQ: IEQ TX BUFFER", DUMP_PREFIX_OFFSET,
16, 8, txbuf->mem.va, txbuf->totallen,
false);
txbuf->do_lpb = true;
irdma_puda_send_buf(ieq, txbuf);
if (!datalen) {
pfpdu->rcv_nxt = buf->seqnum + len;
irdma_puda_ret_bufpool(ieq, buf);
return 0;
}
buf->data = datap;
buf->seqnum = seqnum + len;
buf->datalen = datalen;
pfpdu->rcv_nxt = buf->seqnum;
}
if (partial)
return irdma_ieq_handle_partial(ieq, pfpdu, buf, fpdu_len);
return 0;
}
/**
* irdma_ieq_process_fpdus - process fpdu's buffers on its list
* @qp: qp for which partial fpdus
* @ieq: ieq resource
*/
void irdma_ieq_process_fpdus(struct irdma_sc_qp *qp,
struct irdma_puda_rsrc *ieq)
{
struct irdma_pfpdu *pfpdu = &qp->pfpdu;
struct list_head *rxlist = &pfpdu->rxlist;
struct irdma_puda_buf *buf;
int status;
do {
if (list_empty(rxlist))
break;
buf = irdma_puda_get_listbuf(rxlist);
if (!buf) {
ibdev_dbg(to_ibdev(ieq->dev), "IEQ: error no buf\n");
break;
}
if (buf->seqnum != pfpdu->rcv_nxt) {
/* This could be out of order or missing packet */
pfpdu->out_of_order++;
list_add(&buf->list, rxlist);
break;
}
/* keep processing buffers from the head of the list */
status = irdma_ieq_process_buf(ieq, pfpdu, buf);
if (status == -EINVAL) {
pfpdu->mpa_crc_err = true;
while (!list_empty(rxlist)) {
buf = irdma_puda_get_listbuf(rxlist);
irdma_puda_ret_bufpool(ieq, buf);
pfpdu->crc_err++;
ieq->crc_err++;
}
/* create CQP for AE */
irdma_ieq_mpa_crc_ae(ieq->dev, qp);
}
} while (!status);
}
/**
* irdma_ieq_create_ah - create an address handle for IEQ
* @qp: qp pointer
* @buf: buf received on IEQ used to create AH
*/
static int irdma_ieq_create_ah(struct irdma_sc_qp *qp, struct irdma_puda_buf *buf)
{
struct irdma_ah_info ah_info = {};
qp->pfpdu.ah_buf = buf;
irdma_puda_ieq_get_ah_info(qp, &ah_info);
return irdma_puda_create_ah(qp->vsi->dev, &ah_info, false,
IRDMA_PUDA_RSRC_TYPE_IEQ, qp,
&qp->pfpdu.ah);
}
/**
* irdma_ieq_handle_exception - handle qp's exception
* @ieq: ieq resource
* @qp: qp receiving excpetion
* @buf: receive buffer
*/
static void irdma_ieq_handle_exception(struct irdma_puda_rsrc *ieq,
struct irdma_sc_qp *qp,
struct irdma_puda_buf *buf)
{
struct irdma_pfpdu *pfpdu = &qp->pfpdu;
u32 *hw_host_ctx = (u32 *)qp->hw_host_ctx;
u32 rcv_wnd = hw_host_ctx[23];
/* first partial seq # in q2 */
u32 fps = *(u32 *)(qp->q2_buf + Q2_FPSN_OFFSET);
struct list_head *rxlist = &pfpdu->rxlist;
unsigned long flags = 0;
u8 hw_rev = qp->dev->hw_attrs.uk_attrs.hw_rev;
print_hex_dump_debug("IEQ: IEQ RX BUFFER", DUMP_PREFIX_OFFSET, 16, 8,
buf->mem.va, buf->totallen, false);
spin_lock_irqsave(&pfpdu->lock, flags);
pfpdu->total_ieq_bufs++;
if (pfpdu->mpa_crc_err) {
pfpdu->crc_err++;
goto error;
}
if (pfpdu->mode && fps != pfpdu->fps) {
/* clean up qp as it is new partial sequence */
irdma_ieq_cleanup_qp(ieq, qp);
ibdev_dbg(to_ibdev(ieq->dev), "IEQ: restarting new partial\n");
pfpdu->mode = false;
}
if (!pfpdu->mode) {
print_hex_dump_debug("IEQ: Q2 BUFFER", DUMP_PREFIX_OFFSET, 16,
8, (u64 *)qp->q2_buf, 128, false);
/* First_Partial_Sequence_Number check */
pfpdu->rcv_nxt = fps;
pfpdu->fps = fps;
pfpdu->mode = true;
pfpdu->max_fpdu_data = (buf->ipv4) ?
(ieq->vsi->mtu - IRDMA_MTU_TO_MSS_IPV4) :
(ieq->vsi->mtu - IRDMA_MTU_TO_MSS_IPV6);
pfpdu->pmode_count++;
ieq->pmode_count++;
INIT_LIST_HEAD(rxlist);
irdma_ieq_check_first_buf(buf, fps);
}
if (!(rcv_wnd >= (buf->seqnum - pfpdu->rcv_nxt))) {
pfpdu->bad_seq_num++;
ieq->bad_seq_num++;
goto error;
}
if (!list_empty(rxlist)) {
if (buf->seqnum != pfpdu->nextseqnum) {
irdma_send_ieq_ack(qp);
/* throw away out-of-order, duplicates*/
goto error;
}
}
/* Insert buf before head */
list_add_tail(&buf->list, rxlist);
pfpdu->nextseqnum = buf->seqnum + buf->datalen;
pfpdu->lastrcv_buf = buf;
if (hw_rev >= IRDMA_GEN_2 && !pfpdu->ah) {
irdma_ieq_create_ah(qp, buf);
if (!pfpdu->ah)
goto error;
goto exit;
}
if (hw_rev == IRDMA_GEN_1)
irdma_ieq_process_fpdus(qp, ieq);
else if (pfpdu->ah && pfpdu->ah->ah_info.ah_valid)
irdma_ieq_process_fpdus(qp, ieq);
exit:
spin_unlock_irqrestore(&pfpdu->lock, flags);
return;
error:
irdma_puda_ret_bufpool(ieq, buf);
spin_unlock_irqrestore(&pfpdu->lock, flags);
}
/**
* irdma_ieq_receive - received exception buffer
* @vsi: VSI of device
* @buf: exception buffer received
*/
static void irdma_ieq_receive(struct irdma_sc_vsi *vsi,
struct irdma_puda_buf *buf)
{
struct irdma_puda_rsrc *ieq = vsi->ieq;
struct irdma_sc_qp *qp = NULL;
u32 wqe_idx = ieq->compl_rxwqe_idx;
qp = irdma_ieq_get_qp(vsi->dev, buf);
if (!qp) {
ieq->stats_bad_qp_id++;
irdma_puda_ret_bufpool(ieq, buf);
} else {
irdma_ieq_handle_exception(ieq, qp, buf);
}
/*
* ieq->rx_wqe_idx is used by irdma_puda_replenish_rq()
* on which wqe_idx to start replenish rq
*/
if (!ieq->rxq_invalid_cnt)
ieq->rx_wqe_idx = wqe_idx;
ieq->rxq_invalid_cnt++;
}
/**
* irdma_ieq_tx_compl - put back after sending completed exception buffer
* @vsi: sc VSI struct
* @sqwrid: pointer to puda buffer
*/
static void irdma_ieq_tx_compl(struct irdma_sc_vsi *vsi, void *sqwrid)
{
struct irdma_puda_rsrc *ieq = vsi->ieq;
struct irdma_puda_buf *buf = sqwrid;
irdma_puda_ret_bufpool(ieq, buf);
}
/**
* irdma_ieq_cleanup_qp - qp is being destroyed
* @ieq: ieq resource
* @qp: all pending fpdu buffers
*/
void irdma_ieq_cleanup_qp(struct irdma_puda_rsrc *ieq, struct irdma_sc_qp *qp)
{
struct irdma_puda_buf *buf;
struct irdma_pfpdu *pfpdu = &qp->pfpdu;
struct list_head *rxlist = &pfpdu->rxlist;
if (qp->pfpdu.ah) {
irdma_puda_free_ah(ieq->dev, qp->pfpdu.ah);
qp->pfpdu.ah = NULL;
qp->pfpdu.ah_buf = NULL;
}
if (!pfpdu->mode)
return;
while (!list_empty(rxlist)) {
buf = irdma_puda_get_listbuf(rxlist);
irdma_puda_ret_bufpool(ieq, buf);
}
}