/**
* i40iw_qp_post_wr - post wr to hrdware
* @qp: hw qp ptr
*/
void i40iw_qp_post_wr(struct i40iw_qp_uk *qp)
{
u64 temp;
u32 hw_sq_tail;
u32 sw_sq_head;
/* valid bit is written and loads completed before reading shadow
*
* Whatever is happening here does not match our common macros for
* producer/consumer DMA and may not be portable, however on x86-64
* the required barrier is MFENCE, get a 'portable' version via C11
* atomic.
*/
atomic_thread_fence(memory_order_seq_cst);
/* read the doorbell shadow area */
get_64bit_val(qp->shadow_area, I40IW_BYTE_0, &temp);
hw_sq_tail = (u32)RS_64(temp, I40IW_QP_DBSA_HW_SQ_TAIL);
sw_sq_head = I40IW_RING_GETCURRENT_HEAD(qp->sq_ring);
if (sw_sq_head != hw_sq_tail) {
if (sw_sq_head > qp->initial_ring.head) {
if ((hw_sq_tail >= qp->initial_ring.head) &&
(hw_sq_tail < sw_sq_head)) {
db_wr32(qp->qp_id, qp->wqe_alloc_reg);
}
} else if (sw_sq_head != qp->initial_ring.head) {
if ((hw_sq_tail >= qp->initial_ring.head) ||
(hw_sq_tail < sw_sq_head)) {
db_wr32(qp->qp_id, qp->wqe_alloc_reg);
}
}
}
qp->initial_ring.head = qp->sq_ring.head;
}
/**
* i40iw_puda_poll_info - poll cq for completion
* @cq: cq for poll
* @info: info return for successful completion
*/
static enum i40iw_status_code i40iw_puda_poll_info(struct i40iw_sc_cq *cq,
struct i40iw_puda_completion_info *info)
{
u64 qword0, qword2, qword3;
u64 *cqe;
u64 comp_ctx;
bool valid_bit;
u32 major_err, minor_err;
bool error;
cqe = (u64 *)I40IW_GET_CURRENT_CQ_ELEMENT(&cq->cq_uk);
get_64bit_val(cqe, 24, &qword3);
valid_bit = (bool)RS_64(qword3, I40IW_CQ_VALID);
if (valid_bit != cq->cq_uk.polarity)
return I40IW_ERR_QUEUE_EMPTY;
i40iw_debug_buf(cq->dev, I40IW_DEBUG_PUDA, "PUDA CQE", cqe, 32);
error = (bool)RS_64(qword3, I40IW_CQ_ERROR);
if (error) {
i40iw_debug(cq->dev, I40IW_DEBUG_PUDA, "%s receive error\n", __func__);
major_err = (u32)(RS_64(qword3, I40IW_CQ_MAJERR));
minor_err = (u32)(RS_64(qword3, I40IW_CQ_MINERR));
info->compl_error = major_err << 16 | minor_err;
return I40IW_ERR_CQ_COMPL_ERROR;
}
get_64bit_val(cqe, 0, &qword0);
get_64bit_val(cqe, 16, &qword2);
info->q_type = (u8)RS_64(qword3, I40IW_CQ_SQ);
info->qp_id = (u32)RS_64(qword2, I40IWCQ_QPID);
get_64bit_val(cqe, 8, &comp_ctx);
info->qp = (struct i40iw_qp_uk *)(unsigned long)comp_ctx;
info->wqe_idx = (u32)RS_64(qword3, I40IW_CQ_WQEIDX);
if (info->q_type == I40IW_CQE_QTYPE_RQ) {
info->vlan_valid = (bool)RS_64(qword3, I40IW_VLAN_TAG_VALID);
info->l4proto = (u8)RS_64(qword2, I40IW_UDA_L4PROTO);
info->l3proto = (u8)RS_64(qword2, I40IW_UDA_L3PROTO);
info->payload_len = (u16)RS_64(qword0, I40IW_UDA_PAYLOADLEN);
}
return 0;
}
