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We should drain the command queue to make dma work when congestion occurs. Signed-off-by: Jun Yang --- drivers/dma/dpaa/dpaa_qdma.c | 157 +++++++++++++++++++---------------- 1 file changed, 85 insertions(+), 72 deletions(-) diff --git a/drivers/dma/dpaa/dpaa_qdma.c b/drivers/dma/dpaa/dpaa_qdma.c index de5ecc7d0b..eaa5f81f6d 100644 --- a/drivers/dma/dpaa/dpaa_qdma.c +++ b/drivers/dma/dpaa/dpaa_qdma.c @@ -535,73 +535,6 @@ fsl_qdma_reg_init(struct fsl_qdma_engine *fsl_qdma) return 0; } -static int -fsl_qdma_enqueue_desc_to_ring(struct fsl_qdma_queue *fsl_queue, - int is_burst) -{ - uint16_t i, num = fsl_queue->pending_num, idx, start; - int ret; - - num = is_burst ? fsl_queue->pending_num : 1; - - fsl_queue->desc_in_hw[fsl_queue->ci] = num; - ret = rte_ring_enqueue(fsl_queue->complete_burst, - &fsl_queue->desc_in_hw[fsl_queue->ci]); - if (ret) { - DPAA_QDMA_ERR("%s: Queue is full, try dequeue first", - __func__); - DPAA_QDMA_ERR("%s: submitted:%"PRIu64", completed:%"PRIu64"", - __func__, fsl_queue->stats.submitted, - fsl_queue->stats.completed); - return ret; - } - start = fsl_queue->pending_start; - for (i = 0; i < num; i++) { - idx = (start + i) & (fsl_queue->pending_max - 1); - ret = rte_ring_enqueue(fsl_queue->complete_desc, - &fsl_queue->pending_desc[idx]); - if (ret) { - DPAA_QDMA_ERR("Descriptors eq failed!\r\n"); - return ret; - } - } - - return 0; -} - -static int -fsl_qdma_enqueue_desc_single(struct fsl_qdma_queue *fsl_queue, - dma_addr_t dst, dma_addr_t src, size_t len) -{ - uint8_t *block = fsl_queue->block_vir; - struct fsl_qdma_comp_sg_desc *csgf_src, *csgf_dest; - struct fsl_qdma_cmpd_ft *ft; - int ret; - - ft = fsl_queue->ft[fsl_queue->ci]; - csgf_src = &ft->desc_sbuf; - csgf_dest = &ft->desc_dbuf; - qdma_desc_sge_addr_set64(csgf_src, src); - csgf_src->length = len; - csgf_src->extion = 0; - qdma_desc_sge_addr_set64(csgf_dest, dst); - csgf_dest->length = len; - csgf_dest->extion = 0; - /* This entry is the last entry. */ - csgf_dest->final = 1; - - ret = fsl_qdma_enqueue_desc_to_ring(fsl_queue, 0); - if (ret) - return ret; - fsl_queue->ci = (fsl_queue->ci + 1) & (fsl_queue->n_cq - 1); - - qdma_writel(fsl_queue->le_cqmr | FSL_QDMA_BCQMR_EI, - block + FSL_QDMA_BCQMR(fsl_queue->queue_id)); - fsl_queue->stats.submitted++; - - return 0; -} - static uint16_t dpaa_qdma_block_dequeue(struct fsl_qdma_engine *fsl_qdma, uint8_t block_id) @@ -633,7 +566,6 @@ dpaa_qdma_block_dequeue(struct fsl_qdma_engine *fsl_qdma, ret = qdma_ccdf_get_queue(&cq[start], &qid); if (ret == true) { cmd_queue = &fsl_qdma->cmd_queues[block_id][qid]; - cmd_queue->stats.completed++; ret = rte_ring_dequeue(cmd_queue->complete_burst, (void **)&dq_complete); @@ -677,6 +609,87 @@ dpaa_qdma_block_dequeue(struct fsl_qdma_engine *fsl_qdma, return count; } +static int +fsl_qdma_enqueue_desc_to_ring(struct fsl_qdma_queue *fsl_queue, + int is_burst) +{ + uint16_t i, num = fsl_queue->pending_num, idx, start, dq; + int ret, dq_cnt; + + num = is_burst ? fsl_queue->pending_num : 1; + + fsl_queue->desc_in_hw[fsl_queue->ci] = num; +eq_again: + ret = rte_ring_enqueue(fsl_queue->complete_burst, + &fsl_queue->desc_in_hw[fsl_queue->ci]); + if (ret) { + DPAA_QDMA_DP_DEBUG("%s: Queue is full, try dequeue first", + __func__); + DPAA_QDMA_DP_DEBUG("%s: submitted:%"PRIu64", completed:%"PRIu64"", + __func__, fsl_queue->stats.submitted, + fsl_queue->stats.completed); + dq_cnt = 0; +dq_again: + dq = dpaa_qdma_block_dequeue(fsl_queue->engine, + fsl_queue->block_id); + dq_cnt++; + if (dq > 0) { + goto eq_again; + } else { + if (dq_cnt < 100) + goto dq_again; + DPAA_QDMA_ERR("%s: Dq block%d failed!", + __func__, fsl_queue->block_id); + } + return ret; + } + start = fsl_queue->pending_start; + for (i = 0; i < num; i++) { + idx = (start + i) & (fsl_queue->pending_max - 1); + ret = rte_ring_enqueue(fsl_queue->complete_desc, + &fsl_queue->pending_desc[idx]); + if (ret) { + DPAA_QDMA_ERR("Descriptors eq failed!\r\n"); + return ret; + } + } + + return 0; +} + +static int +fsl_qdma_enqueue_desc_single(struct fsl_qdma_queue *fsl_queue, + dma_addr_t dst, dma_addr_t src, size_t len) +{ + uint8_t *block = fsl_queue->block_vir; + struct fsl_qdma_comp_sg_desc *csgf_src, *csgf_dest; + struct fsl_qdma_cmpd_ft *ft; + int ret; + + ft = fsl_queue->ft[fsl_queue->ci]; + csgf_src = &ft->desc_sbuf; + csgf_dest = &ft->desc_dbuf; + qdma_desc_sge_addr_set64(csgf_src, src); + csgf_src->length = len; + csgf_src->extion = 0; + qdma_desc_sge_addr_set64(csgf_dest, dst); + csgf_dest->length = len; + csgf_dest->extion = 0; + /* This entry is the last entry. */ + csgf_dest->final = 1; + + ret = fsl_qdma_enqueue_desc_to_ring(fsl_queue, 0); + if (ret) + return ret; + fsl_queue->ci = (fsl_queue->ci + 1) & (fsl_queue->n_cq - 1); + + qdma_writel(fsl_queue->le_cqmr | FSL_QDMA_BCQMR_EI, + block + FSL_QDMA_BCQMR(fsl_queue->queue_id)); + fsl_queue->stats.submitted++; + + return 0; +} + static int fsl_qdma_enqueue_overflow(struct fsl_qdma_queue *fsl_queue) { @@ -702,7 +715,7 @@ fsl_qdma_enqueue_overflow(struct fsl_qdma_queue *fsl_queue) if (likely(!overflow)) return 0; - DPAA_QDMA_ERR("TC%d/Q%d submitted(%"PRIu64")-completed(%"PRIu64") >= %d", + DPAA_QDMA_DP_DEBUG("TC%d/Q%d submitted(%"PRIu64")-completed(%"PRIu64") >= %d", fsl_queue->block_id, fsl_queue->queue_id, st->submitted, st->completed, QDMA_QUEUE_CR_WM); drain_num = 0; @@ -712,7 +725,7 @@ fsl_qdma_enqueue_overflow(struct fsl_qdma_queue *fsl_queue) fsl_queue->block_id); if (!blk_drain) { drain_num++; - if (drain_num > 100) { + if (drain_num > 1000) { DPAA_QDMA_ERR("TC%d failed drain, Q%d's %"PRIu64" bd in HW.", fsl_queue->block_id, fsl_queue->queue_id, st->submitted - st->completed); @@ -721,8 +734,8 @@ fsl_qdma_enqueue_overflow(struct fsl_qdma_queue *fsl_queue) goto drain_again; } check_num++; - if (check_num > 10) { - DPAA_QDMA_ERR("TC%d failed drain, Q%d's %"PRIu64" bd in HW.", + if (check_num > 1000) { + DPAA_QDMA_ERR("TC%d failed check, Q%d's %"PRIu64" bd in HW.", fsl_queue->block_id, fsl_queue->queue_id, st->submitted - st->completed); return -ENOSPC; -- 2.25.1