d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
d913278fc1
freebsd-skq/sys/contrib/ena-com/ena_eth_com.c
mw 42c24319a9 Update ena-com HAL to v1.1.4.3 and update driver accordingly 
The newest ena-com HAL supports LLQv2 and introduces
API changes. In order not to break the driver compilation
it was updated/fixed in a following way:

* Change version of the driver to 0.8.0
* Provide reset cause when triggering reset of the device
* Reset device after attach fails
* In the reset task free management irq after calling ena_down. Admin
  queue can still be used before ena_down is called, or when it is
  being handled
* Do not reset device if ena_reset_task fails
* Move call of the ena_com_dev_reset to the ena_down() routine - it
  should be called only if interface was up
* Use different function for checking empty space on the sq ring
  (ena-com API change)
* Fix typo on ENA_TX_CLEANUP_THRESHOLD
* Change checking for EPERM with EOPNOTSUPP - change in the ena-com API
* Minor style fixes

Submitted by: Michal Krawczyk <mk@semihalf.com>
Obtained from: Amazon.com, Inc.
               Semihalf
Sponsored by: Amazon.com, Inc.
Differential Revision: https://reviews.freebsd.org/D12143
2017-10-31 12:41:07 +00:00

625 lines
18 KiB
C
Raw Blame History

/*-
* BSD LICENSE
*
* Copyright (c) 2015-2017 Amazon.com, Inc. or its affiliates.
* All rights reserved.
*
* 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.
* * Neither the name of copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "ena_eth_com.h"
static inline struct ena_eth_io_rx_cdesc_base *ena_com_get_next_rx_cdesc(
struct ena_com_io_cq *io_cq)
{
struct ena_eth_io_rx_cdesc_base *cdesc;
u16 expected_phase, head_masked;
u16 desc_phase;
head_masked = io_cq->head & (io_cq->q_depth - 1);
expected_phase = io_cq->phase;
cdesc = (struct ena_eth_io_rx_cdesc_base *)(io_cq->cdesc_addr.virt_addr
+ (head_masked * io_cq->cdesc_entry_size_in_bytes));
desc_phase = (READ_ONCE(cdesc->status) & ENA_ETH_IO_RX_CDESC_BASE_PHASE_MASK) >>
ENA_ETH_IO_RX_CDESC_BASE_PHASE_SHIFT;
if (desc_phase != expected_phase)
return NULL;
return cdesc;
}
static inline void ena_com_cq_inc_head(struct ena_com_io_cq *io_cq)
{
io_cq->head++;
/* Switch phase bit in case of wrap around */
if (unlikely((io_cq->head & (io_cq->q_depth - 1)) == 0))
io_cq->phase ^= 1;
}
static inline void *get_sq_desc_regular_queue(struct ena_com_io_sq *io_sq)
{
u16 tail_masked;
u32 offset;
tail_masked = io_sq->tail & (io_sq->q_depth - 1);
offset = tail_masked * io_sq->desc_entry_size;
return (void *)((uintptr_t)io_sq->desc_addr.virt_addr + offset);
}
static inline void ena_com_write_bounce_buffer_to_dev(struct ena_com_io_sq *io_sq,
u8 *bounce_buffer)
{
struct ena_com_llq_info *llq_info = &io_sq->llq_info;
u16 dst_tail_mask;
u32 dst_offset;
dst_tail_mask = io_sq->tail & (io_sq->q_depth - 1);
dst_offset = dst_tail_mask * llq_info->desc_list_entry_size;
/* Make sure everything was written into the bounce buffer before
* writing the bounce buffer to the device
*/
wmb();
/* The line is completed. Copy it to dev */
ENA_MEMCPY_TO_DEVICE_64(io_sq->desc_addr.pbuf_dev_addr + dst_offset,
bounce_buffer,
llq_info->desc_list_entry_size);
io_sq->tail++;
/* Switch phase bit in case of wrap around */
if (unlikely((io_sq->tail & (io_sq->q_depth - 1)) == 0))
io_sq->phase ^= 1;
}
static inline int ena_com_write_header_to_bounce(struct ena_com_io_sq *io_sq,
u8 *header_src,
u16 header_len)
{
struct ena_com_llq_pkt_ctrl *pkt_ctrl = &io_sq->llq_buf_ctrl;
struct ena_com_llq_info *llq_info = &io_sq->llq_info;
u8 *bounce_buffer = pkt_ctrl->curr_bounce_buf;
u16 header_offset;
if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST)
return 0;
header_offset =
llq_info->descs_num_before_header * io_sq->desc_entry_size;
if (unlikely((header_offset + header_len) > llq_info->desc_list_entry_size)) {
ena_trc_err("trying to write header larger than llq entry can accommodate\n");
return ENA_COM_FAULT;
}
if (unlikely(!bounce_buffer)) {
ena_trc_err("bounce buffer is NULL\n");
return ENA_COM_FAULT;
}
memcpy(bounce_buffer + header_offset, header_src, header_len);
return 0;
}
static inline void *get_sq_desc_llq(struct ena_com_io_sq *io_sq)
{
struct ena_com_llq_pkt_ctrl *pkt_ctrl = &io_sq->llq_buf_ctrl;
u8 *bounce_buffer;
void *sq_desc;
bounce_buffer = pkt_ctrl->curr_bounce_buf;
if (unlikely(!bounce_buffer)) {
ena_trc_err("bounce buffer is NULL\n");
return NULL;
}
sq_desc = bounce_buffer + pkt_ctrl->idx * io_sq->desc_entry_size;
pkt_ctrl->idx++;
pkt_ctrl->descs_left_in_line--;
return sq_desc;
}
static inline void ena_com_close_bounce_buffer(struct ena_com_io_sq *io_sq)
{
struct ena_com_llq_pkt_ctrl *pkt_ctrl = &io_sq->llq_buf_ctrl;
struct ena_com_llq_info *llq_info = &io_sq->llq_info;
if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST)
return;
/* bounce buffer was used, so write it and get a new one */
if (pkt_ctrl->idx) {
ena_com_write_bounce_buffer_to_dev(io_sq,
pkt_ctrl->curr_bounce_buf);
pkt_ctrl->curr_bounce_buf =
ena_com_get_next_bounce_buffer(&io_sq->bounce_buf_ctrl);
memset(io_sq->llq_buf_ctrl.curr_bounce_buf,
0x0, llq_info->desc_list_entry_size);
}
pkt_ctrl->idx = 0;
pkt_ctrl->descs_left_in_line = llq_info->descs_num_before_header;
}
static inline void *get_sq_desc(struct ena_com_io_sq *io_sq)
{
if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV)
return get_sq_desc_llq(io_sq);
return get_sq_desc_regular_queue(io_sq);
}
static inline void ena_com_sq_update_llq_tail(struct ena_com_io_sq *io_sq)
{
struct ena_com_llq_pkt_ctrl *pkt_ctrl = &io_sq->llq_buf_ctrl;
struct ena_com_llq_info *llq_info = &io_sq->llq_info;
if (!pkt_ctrl->descs_left_in_line) {
ena_com_write_bounce_buffer_to_dev(io_sq,
pkt_ctrl->curr_bounce_buf);
pkt_ctrl->curr_bounce_buf =
ena_com_get_next_bounce_buffer(&io_sq->bounce_buf_ctrl);
memset(io_sq->llq_buf_ctrl.curr_bounce_buf,
0x0, llq_info->desc_list_entry_size);
pkt_ctrl->idx = 0;
if (llq_info->desc_stride_ctrl == ENA_ADMIN_SINGLE_DESC_PER_ENTRY)
pkt_ctrl->descs_left_in_line = 1;
else
pkt_ctrl->descs_left_in_line =
llq_info->desc_list_entry_size / io_sq->desc_entry_size;
}
}
static inline void ena_com_sq_update_tail(struct ena_com_io_sq *io_sq)
{
if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
ena_com_sq_update_llq_tail(io_sq);
return;
}
io_sq->tail++;
/* Switch phase bit in case of wrap around */
if (unlikely((io_sq->tail & (io_sq->q_depth - 1)) == 0))
io_sq->phase ^= 1;
}
static inline struct ena_eth_io_rx_cdesc_base *
ena_com_rx_cdesc_idx_to_ptr(struct ena_com_io_cq *io_cq, u16 idx)
{
idx &= (io_cq->q_depth - 1);
return (struct ena_eth_io_rx_cdesc_base *)
((uintptr_t)io_cq->cdesc_addr.virt_addr +
idx * io_cq->cdesc_entry_size_in_bytes);
}
static inline u16 ena_com_cdesc_rx_pkt_get(struct ena_com_io_cq *io_cq,
u16 *first_cdesc_idx)
{
struct ena_eth_io_rx_cdesc_base *cdesc;
u16 count = 0, head_masked;
u32 last = 0;
do {
cdesc = ena_com_get_next_rx_cdesc(io_cq);
if (!cdesc)
break;
ena_com_cq_inc_head(io_cq);
count++;
last = (READ_ONCE(cdesc->status) & ENA_ETH_IO_RX_CDESC_BASE_LAST_MASK) >>
ENA_ETH_IO_RX_CDESC_BASE_LAST_SHIFT;
} while (!last);
if (last) {
*first_cdesc_idx = io_cq->cur_rx_pkt_cdesc_start_idx;
count += io_cq->cur_rx_pkt_cdesc_count;
head_masked = io_cq->head & (io_cq->q_depth - 1);
io_cq->cur_rx_pkt_cdesc_count = 0;
io_cq->cur_rx_pkt_cdesc_start_idx = head_masked;
ena_trc_dbg("ena q_id: %d packets were completed. first desc idx %u descs# %d\n",
io_cq->qid, *first_cdesc_idx, count);
} else {
io_cq->cur_rx_pkt_cdesc_count += count;
count = 0;
}
return count;
}
static inline bool ena_com_meta_desc_changed(struct ena_com_io_sq *io_sq,
struct ena_com_tx_ctx *ena_tx_ctx)
{
int rc;
if (ena_tx_ctx->meta_valid) {
rc = memcmp(&io_sq->cached_tx_meta,
&ena_tx_ctx->ena_meta,
sizeof(struct ena_com_tx_meta));
if (unlikely(rc != 0))
return true;
}
return false;
}
static inline void ena_com_create_and_store_tx_meta_desc(struct ena_com_io_sq *io_sq,
struct ena_com_tx_ctx *ena_tx_ctx)
{
struct ena_eth_io_tx_meta_desc *meta_desc = NULL;
struct ena_com_tx_meta *ena_meta = &ena_tx_ctx->ena_meta;
meta_desc = get_sq_desc(io_sq);
memset(meta_desc, 0x0, sizeof(struct ena_eth_io_tx_meta_desc));
meta_desc->len_ctrl |= ENA_ETH_IO_TX_META_DESC_META_DESC_MASK;
meta_desc->len_ctrl |= ENA_ETH_IO_TX_META_DESC_EXT_VALID_MASK;
/* bits 0-9 of the mss */
meta_desc->word2 |= (ena_meta->mss <<
ENA_ETH_IO_TX_META_DESC_MSS_LO_SHIFT) &
ENA_ETH_IO_TX_META_DESC_MSS_LO_MASK;
/* bits 10-13 of the mss */
meta_desc->len_ctrl |= ((ena_meta->mss >> 10) <<
ENA_ETH_IO_TX_META_DESC_MSS_HI_SHIFT) &
ENA_ETH_IO_TX_META_DESC_MSS_HI_MASK;
/* Extended meta desc */
meta_desc->len_ctrl |= ENA_ETH_IO_TX_META_DESC_ETH_META_TYPE_MASK;
meta_desc->len_ctrl |= ENA_ETH_IO_TX_META_DESC_META_STORE_MASK;
meta_desc->len_ctrl |= (io_sq->phase <<
ENA_ETH_IO_TX_META_DESC_PHASE_SHIFT) &
ENA_ETH_IO_TX_META_DESC_PHASE_MASK;
meta_desc->len_ctrl |= ENA_ETH_IO_TX_META_DESC_FIRST_MASK;
meta_desc->word2 |= ena_meta->l3_hdr_len &
ENA_ETH_IO_TX_META_DESC_L3_HDR_LEN_MASK;
meta_desc->word2 |= (ena_meta->l3_hdr_offset <<
ENA_ETH_IO_TX_META_DESC_L3_HDR_OFF_SHIFT) &
ENA_ETH_IO_TX_META_DESC_L3_HDR_OFF_MASK;
meta_desc->word2 |= (ena_meta->l4_hdr_len <<
ENA_ETH_IO_TX_META_DESC_L4_HDR_LEN_IN_WORDS_SHIFT) &
ENA_ETH_IO_TX_META_DESC_L4_HDR_LEN_IN_WORDS_MASK;
meta_desc->len_ctrl |= ENA_ETH_IO_TX_META_DESC_META_STORE_MASK;
/* Cached the meta desc */
memcpy(&io_sq->cached_tx_meta, ena_meta,
sizeof(struct ena_com_tx_meta));
ena_com_sq_update_tail(io_sq);
}
static inline void ena_com_rx_set_flags(struct ena_com_rx_ctx *ena_rx_ctx,
struct ena_eth_io_rx_cdesc_base *cdesc)
{
ena_rx_ctx->l3_proto = cdesc->status &
ENA_ETH_IO_RX_CDESC_BASE_L3_PROTO_IDX_MASK;
ena_rx_ctx->l4_proto =
(cdesc->status & ENA_ETH_IO_RX_CDESC_BASE_L4_PROTO_IDX_MASK) >>
ENA_ETH_IO_RX_CDESC_BASE_L4_PROTO_IDX_SHIFT;
ena_rx_ctx->l3_csum_err =
(cdesc->status & ENA_ETH_IO_RX_CDESC_BASE_L3_CSUM_ERR_MASK) >>
ENA_ETH_IO_RX_CDESC_BASE_L3_CSUM_ERR_SHIFT;
ena_rx_ctx->l4_csum_err =
(cdesc->status & ENA_ETH_IO_RX_CDESC_BASE_L4_CSUM_ERR_MASK) >>
ENA_ETH_IO_RX_CDESC_BASE_L4_CSUM_ERR_SHIFT;
ena_rx_ctx->hash = cdesc->hash;
ena_rx_ctx->frag =
(cdesc->status & ENA_ETH_IO_RX_CDESC_BASE_IPV4_FRAG_MASK) >>
ENA_ETH_IO_RX_CDESC_BASE_IPV4_FRAG_SHIFT;
ena_trc_dbg("ena_rx_ctx->l3_proto %d ena_rx_ctx->l4_proto %d\nena_rx_ctx->l3_csum_err %d ena_rx_ctx->l4_csum_err %d\nhash frag %d frag: %d cdesc_status: %x\n",
ena_rx_ctx->l3_proto,
ena_rx_ctx->l4_proto,
ena_rx_ctx->l3_csum_err,
ena_rx_ctx->l4_csum_err,
ena_rx_ctx->hash,
ena_rx_ctx->frag,
cdesc->status);
}
/*****************************************************************************/
/***************************** API **********************************/
/*****************************************************************************/
int ena_com_prepare_tx(struct ena_com_io_sq *io_sq,
struct ena_com_tx_ctx *ena_tx_ctx,
int *nb_hw_desc)
{
struct ena_eth_io_tx_desc *desc = NULL;
struct ena_com_buf *ena_bufs = ena_tx_ctx->ena_bufs;
void *buffer_to_push = ena_tx_ctx->push_header;
u16 header_len = ena_tx_ctx->header_len;
u16 num_bufs = ena_tx_ctx->num_bufs;
u16 start_tail = io_sq->tail;
int i, rc;
bool have_meta;
u64 addr_hi;
ENA_WARN(io_sq->direction != ENA_COM_IO_QUEUE_DIRECTION_TX,
"wrong Q type");
/* num_bufs +1 for potential meta desc */
if (!ena_com_sq_have_enough_space(io_sq, num_bufs + 1)) {
ena_trc_err("Not enough space in the tx queue\n");
return ENA_COM_NO_MEM;
}
if (unlikely(header_len > io_sq->tx_max_header_size)) {
ena_trc_err("header size is too large %d max header: %d\n",
header_len, io_sq->tx_max_header_size);
return ENA_COM_INVAL;
}
if (unlikely((io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) && !buffer_to_push))
return ENA_COM_INVAL;
rc = ena_com_write_header_to_bounce(io_sq, buffer_to_push, header_len);
if (unlikely(rc))
return rc;
have_meta = ena_tx_ctx->meta_valid && ena_com_meta_desc_changed(io_sq,
ena_tx_ctx);
if (have_meta)
ena_com_create_and_store_tx_meta_desc(io_sq, ena_tx_ctx);
/* If the caller doesn't want send packets */
if (unlikely(!num_bufs && !header_len)) {
ena_com_close_bounce_buffer(io_sq);
*nb_hw_desc = io_sq->tail - start_tail;
return 0;
}
desc = get_sq_desc(io_sq);
if (unlikely(!desc))
return ENA_COM_FAULT;
memset(desc, 0x0, sizeof(struct ena_eth_io_tx_desc));
/* Set first desc when we don't have meta descriptor */
if (!have_meta)
desc->len_ctrl |= ENA_ETH_IO_TX_DESC_FIRST_MASK;
desc->buff_addr_hi_hdr_sz |= (header_len <<
ENA_ETH_IO_TX_DESC_HEADER_LENGTH_SHIFT) &
ENA_ETH_IO_TX_DESC_HEADER_LENGTH_MASK;
desc->len_ctrl |= (io_sq->phase << ENA_ETH_IO_TX_DESC_PHASE_SHIFT) &
ENA_ETH_IO_TX_DESC_PHASE_MASK;
desc->len_ctrl |= ENA_ETH_IO_TX_DESC_COMP_REQ_MASK;
/* Bits 0-9 */
desc->meta_ctrl |= (ena_tx_ctx->req_id <<
ENA_ETH_IO_TX_DESC_REQ_ID_LO_SHIFT) &
ENA_ETH_IO_TX_DESC_REQ_ID_LO_MASK;
desc->meta_ctrl |= (ena_tx_ctx->df <<
ENA_ETH_IO_TX_DESC_DF_SHIFT) &
ENA_ETH_IO_TX_DESC_DF_MASK;
/* Bits 10-15 */
desc->len_ctrl |= ((ena_tx_ctx->req_id >> 10) <<
ENA_ETH_IO_TX_DESC_REQ_ID_HI_SHIFT) &
ENA_ETH_IO_TX_DESC_REQ_ID_HI_MASK;
if (ena_tx_ctx->meta_valid) {
desc->meta_ctrl |= (ena_tx_ctx->tso_enable <<
ENA_ETH_IO_TX_DESC_TSO_EN_SHIFT) &
ENA_ETH_IO_TX_DESC_TSO_EN_MASK;
desc->meta_ctrl |= ena_tx_ctx->l3_proto &
ENA_ETH_IO_TX_DESC_L3_PROTO_IDX_MASK;
desc->meta_ctrl |= (ena_tx_ctx->l4_proto <<
ENA_ETH_IO_TX_DESC_L4_PROTO_IDX_SHIFT) &
ENA_ETH_IO_TX_DESC_L4_PROTO_IDX_MASK;
desc->meta_ctrl |= (ena_tx_ctx->l3_csum_enable <<
ENA_ETH_IO_TX_DESC_L3_CSUM_EN_SHIFT) &
ENA_ETH_IO_TX_DESC_L3_CSUM_EN_MASK;
desc->meta_ctrl |= (ena_tx_ctx->l4_csum_enable <<
ENA_ETH_IO_TX_DESC_L4_CSUM_EN_SHIFT) &
ENA_ETH_IO_TX_DESC_L4_CSUM_EN_MASK;
desc->meta_ctrl |= (ena_tx_ctx->l4_csum_partial <<
ENA_ETH_IO_TX_DESC_L4_CSUM_PARTIAL_SHIFT) &
ENA_ETH_IO_TX_DESC_L4_CSUM_PARTIAL_MASK;
}
for (i = 0; i < num_bufs; i++) {
/* The first desc share the same desc as the header */
if (likely(i != 0)) {
ena_com_sq_update_tail(io_sq);
desc = get_sq_desc(io_sq);
if (unlikely(!desc))
return ENA_COM_FAULT;
memset(desc, 0x0, sizeof(struct ena_eth_io_tx_desc));
desc->len_ctrl |= (io_sq->phase <<
ENA_ETH_IO_TX_DESC_PHASE_SHIFT) &
ENA_ETH_IO_TX_DESC_PHASE_MASK;
}
desc->len_ctrl |= ena_bufs->len &
ENA_ETH_IO_TX_DESC_LENGTH_MASK;
addr_hi = ((ena_bufs->paddr &
GENMASK_ULL(io_sq->dma_addr_bits - 1, 32)) >> 32);
desc->buff_addr_lo = (u32)ena_bufs->paddr;
desc->buff_addr_hi_hdr_sz |= addr_hi &
ENA_ETH_IO_TX_DESC_ADDR_HI_MASK;
ena_bufs++;
}
/* set the last desc indicator */
desc->len_ctrl |= ENA_ETH_IO_TX_DESC_LAST_MASK;
ena_com_sq_update_tail(io_sq);
ena_com_close_bounce_buffer(io_sq);
*nb_hw_desc = io_sq->tail - start_tail;
return 0;
}
int ena_com_rx_pkt(struct ena_com_io_cq *io_cq,
struct ena_com_io_sq *io_sq,
struct ena_com_rx_ctx *ena_rx_ctx)
{
struct ena_com_rx_buf_info *ena_buf = &ena_rx_ctx->ena_bufs[0];
struct ena_eth_io_rx_cdesc_base *cdesc = NULL;
u16 cdesc_idx = 0;
u16 nb_hw_desc;
u16 i;
ENA_WARN(io_cq->direction != ENA_COM_IO_QUEUE_DIRECTION_RX,
"wrong Q type");
nb_hw_desc = ena_com_cdesc_rx_pkt_get(io_cq, &cdesc_idx);
if (nb_hw_desc == 0) {
ena_rx_ctx->descs = nb_hw_desc;
return 0;
}
ena_trc_dbg("fetch rx packet: queue %d completed desc: %d\n",
io_cq->qid, nb_hw_desc);
if (unlikely(nb_hw_desc > ena_rx_ctx->max_bufs)) {
ena_trc_err("Too many RX cdescs (%d) > MAX(%d)\n",
nb_hw_desc, ena_rx_ctx->max_bufs);
return ENA_COM_NO_SPACE;
}
for (i = 0; i < nb_hw_desc; i++) {
cdesc = ena_com_rx_cdesc_idx_to_ptr(io_cq, cdesc_idx + i);
ena_buf->len = cdesc->length;
ena_buf->req_id = cdesc->req_id;
ena_buf++;
}
/* Update SQ head ptr */
io_sq->next_to_comp += nb_hw_desc;
ena_trc_dbg("[%s][QID#%d] Updating SQ head to: %d\n", __func__,
io_sq->qid, io_sq->next_to_comp);
/* Get rx flags from the last pkt */
ena_com_rx_set_flags(ena_rx_ctx, cdesc);
ena_rx_ctx->descs = nb_hw_desc;
return 0;
}
int ena_com_add_single_rx_desc(struct ena_com_io_sq *io_sq,
struct ena_com_buf *ena_buf,
u16 req_id)
{
struct ena_eth_io_rx_desc *desc;
ENA_WARN(io_sq->direction != ENA_COM_IO_QUEUE_DIRECTION_RX,
"wrong Q type");
if (unlikely(!ena_com_sq_have_enough_space(io_sq, 1)))
return ENA_COM_NO_SPACE;
desc = get_sq_desc(io_sq);
if (unlikely(!desc))
return ENA_COM_FAULT;
memset(desc, 0x0, sizeof(struct ena_eth_io_rx_desc));
desc->length = ena_buf->len;
desc->ctrl |= ENA_ETH_IO_RX_DESC_FIRST_MASK;
desc->ctrl |= ENA_ETH_IO_RX_DESC_LAST_MASK;
desc->ctrl |= io_sq->phase & ENA_ETH_IO_RX_DESC_PHASE_MASK;
desc->ctrl |= ENA_ETH_IO_RX_DESC_COMP_REQ_MASK;
desc->req_id = req_id;
desc->buff_addr_lo = (u32)ena_buf->paddr;
desc->buff_addr_hi =
((ena_buf->paddr & GENMASK_ULL(io_sq->dma_addr_bits - 1, 32)) >> 32);
ena_com_sq_update_tail(io_sq);
return 0;
}
int ena_com_tx_comp_req_id_get(struct ena_com_io_cq *io_cq, u16 *req_id)
{
u8 expected_phase, cdesc_phase;
struct ena_eth_io_tx_cdesc *cdesc;
u16 masked_head;
masked_head = io_cq->head & (io_cq->q_depth - 1);
expected_phase = io_cq->phase;
cdesc = (struct ena_eth_io_tx_cdesc *)
((uintptr_t)io_cq->cdesc_addr.virt_addr +
(masked_head * io_cq->cdesc_entry_size_in_bytes));
/* When the current completion descriptor phase isn't the same as the
* expected, it mean that the device still didn't update
* this completion.
*/
cdesc_phase = READ_ONCE(cdesc->flags) & ENA_ETH_IO_TX_CDESC_PHASE_MASK;
if (cdesc_phase != expected_phase)
return ENA_COM_TRY_AGAIN;
if (unlikely(cdesc->req_id >= io_cq->q_depth)) {
ena_trc_err("Invalid req id %d\n", cdesc->req_id);
return ENA_COM_INVAL;
}
ena_com_cq_inc_head(io_cq);
*req_id = READ_ONCE(cdesc->req_id);
return 0;
}
Reference in New Issue View Git Blame Copy Permalink