From 59d345dad36a76b8074de0ea85b04739b72f663f Mon Sep 17 00:00:00 2001 From: Satha Rao Date: Fri, 5 Jul 2019 14:08:02 +0530 Subject: [PATCH] raw/octeontx2_dma: add enqueue operation Add enqueue operation. Signed-off-by: Satha Rao Signed-off-by: Vamsi Attunuru --- doc/guides/rawdevs/octeontx2_dma.rst | 6 + drivers/raw/octeontx2_dma/otx2_dpi_rawdev.c | 166 ++++++++++++++++++++ 2 files changed, 172 insertions(+) diff --git a/doc/guides/rawdevs/octeontx2_dma.rst b/doc/guides/rawdevs/octeontx2_dma.rst index 5e926d10df..748f4dbd49 100644 --- a/doc/guides/rawdevs/octeontx2_dma.rst +++ b/doc/guides/rawdevs/octeontx2_dma.rst @@ -82,3 +82,9 @@ The following code shows how the device is configured rte_mempool_populate_default(conf.chunk_pool); rte_rawdev_configure(dev_id, (rte_rawdev_obj_t)&rdev_info); + +Performing Data Transfer +------------------------ + +To perform data transfer using OCTEON TX2 DMA rawdev devices use standard +``rte_rawdev_enqueue_buffers()`` and ``rte_rawdev_dequeue_buffers()`` APIs. diff --git a/drivers/raw/octeontx2_dma/otx2_dpi_rawdev.c b/drivers/raw/octeontx2_dma/otx2_dpi_rawdev.c index f9c330d69c..a1d679f837 100644 --- a/drivers/raw/octeontx2_dma/otx2_dpi_rawdev.c +++ b/drivers/raw/octeontx2_dma/otx2_dpi_rawdev.c @@ -69,6 +69,171 @@ dma_queue_finish(struct dpi_vf_s *dpivf) return DPI_DMA_QUEUE_SUCCESS; } +/* Write an arbitrary number of command words to a command queue */ +static __rte_always_inline enum dpi_dma_queue_result_e +dma_queue_write(struct dpi_vf_s *dpi, uint16_t cmd_count, uint64_t *cmds) +{ + if ((cmd_count < 1) || (cmd_count > 64)) + return DPI_DMA_QUEUE_INVALID_PARAM; + + if (cmds == NULL) + return DPI_DMA_QUEUE_INVALID_PARAM; + + /* Room available in the current buffer for the command */ + if (dpi->index + cmd_count < dpi->pool_size_m1) { + uint64_t *ptr = dpi->base_ptr; + + ptr += dpi->index; + dpi->index += cmd_count; + while (cmd_count--) + *ptr++ = *cmds++; + } else { + void *new_buffer; + uint64_t *ptr; + int count; + + /* Allocate new command buffer, return if failed */ + if (rte_mempool_get(dpi->chunk_pool, &new_buffer) || + new_buffer == NULL) { + return DPI_DMA_QUEUE_NO_MEMORY; + } + ptr = dpi->base_ptr; + /* Figure out how many command words will fit in this buffer. + * One location will be needed for the next buffer pointer. + **/ + count = dpi->pool_size_m1 - dpi->index; + ptr += dpi->index; + cmd_count -= count; + while (count--) + *ptr++ = *cmds++; + /* Chunk next ptr is 2DWORDs, second DWORD is reserved. */ + *ptr++ = (uint64_t)new_buffer; + *ptr = 0; + /* The current buffer is full and has a link to the next buffer. + * Time to write the rest of the commands into the new buffer. + **/ + dpi->base_ptr = new_buffer; + dpi->index = cmd_count; + ptr = new_buffer; + while (cmd_count--) + *ptr++ = *cmds++; + /* queue index may greater than pool size */ + if (dpi->index >= dpi->pool_size_m1) { + if (rte_mempool_get(dpi->chunk_pool, &new_buffer) || + new_buffer == NULL) { + return DPI_DMA_QUEUE_NO_MEMORY; + } + /* Write next buffer address */ + *ptr = (uint64_t)new_buffer; + dpi->base_ptr = new_buffer; + dpi->index = 0; + } + } + return DPI_DMA_QUEUE_SUCCESS; +} + +/* Submit a DMA command to the DMA queues. */ +static __rte_always_inline int +dma_queue_submit(struct rte_rawdev *dev, uint16_t cmd_count, uint64_t *cmds) +{ + struct dpi_vf_s *dpivf = dev->dev_private; + enum dpi_dma_queue_result_e result; + + result = dma_queue_write(dpivf, cmd_count, cmds); + rte_wmb(); + if (likely(result == DPI_DMA_QUEUE_SUCCESS)) + otx2_write64((uint64_t)cmd_count, + dpivf->vf_bar0 + DPI_VDMA_DBELL); + + return result; +} + +/* Enqueue buffers to DMA queue + * returns number of buffers enqueued successfully + */ +static int +otx2_dpi_rawdev_enqueue_bufs(struct rte_rawdev *dev, + struct rte_rawdev_buf **buffers, + unsigned int count, rte_rawdev_obj_t context) +{ + struct dpi_dma_queue_ctx_s *ctx = (struct dpi_dma_queue_ctx_s *)context; + struct dpi_dma_buf_ptr_s *cmd; + uint32_t c = 0; + + for (c = 0; c < count; c++) { + uint64_t dpi_cmd[DPI_DMA_CMD_SIZE] = {0}; + union dpi_dma_instr_hdr_u *hdr; + uint16_t index = 0, i; + + hdr = (union dpi_dma_instr_hdr_u *)&dpi_cmd[0]; + cmd = (struct dpi_dma_buf_ptr_s *)buffers[c]->buf_addr; + + hdr->s.xtype = ctx->xtype & DPI_XTYPE_MASK; + hdr->s.pt = ctx->pt & DPI_HDR_PT_MASK; + /* Request initiated with byte write completion, but completion + * pointer not provided + */ + if ((hdr->s.pt == DPI_HDR_PT_ZBW_CA || + hdr->s.pt == DPI_HDR_PT_ZBW_NC) && cmd->comp_ptr == NULL) + return c; + + cmd->comp_ptr->cdata = DPI_REQ_CDATA; + hdr->s.ptr = (uint64_t)cmd->comp_ptr; + hdr->s.deallocv = ctx->deallocv; + hdr->s.tt = ctx->tt & DPI_W0_TT_MASK; + hdr->s.grp = ctx->grp & DPI_W0_GRP_MASK; + + /* If caller provides completion ring details, then only queue + * completion address for later polling. + */ + if (ctx->c_ring) { + ctx->c_ring->compl_data[ctx->c_ring->tail] = + cmd->comp_ptr; + STRM_INC(ctx->c_ring); + } + + if (hdr->s.deallocv) + hdr->s.pvfe = 1; + + if (hdr->s.pt == DPI_HDR_PT_WQP) + hdr->s.ptr = hdr->s.ptr | DPI_HDR_PT_WQP_STATUSNC; + + index += 4; + hdr->s.fport = 0; + hdr->s.lport = 0; + + /* For inbound case, src pointers are last pointers. + * For all other cases, src pointers are first pointers. + */ + if (ctx->xtype == DPI_XTYPE_INBOUND) { + hdr->s.nfst = cmd->wptr_cnt & DPI_MAX_POINTER; + hdr->s.nlst = cmd->rptr_cnt & DPI_MAX_POINTER; + for (i = 0; i < hdr->s.nfst; i++) { + dpi_cmd[index++] = cmd->wptr[i]->u[0]; + dpi_cmd[index++] = cmd->wptr[i]->u[1]; + } + for (i = 0; i < hdr->s.nlst; i++) { + dpi_cmd[index++] = cmd->rptr[i]->u[0]; + dpi_cmd[index++] = cmd->rptr[i]->u[1]; + } + } else { + hdr->s.nfst = cmd->rptr_cnt & DPI_MAX_POINTER; + hdr->s.nlst = cmd->wptr_cnt & DPI_MAX_POINTER; + for (i = 0; i < hdr->s.nfst; i++) { + dpi_cmd[index++] = cmd->rptr[i]->u[0]; + dpi_cmd[index++] = cmd->rptr[i]->u[1]; + } + for (i = 0; i < hdr->s.nlst; i++) { + dpi_cmd[index++] = cmd->wptr[i]->u[0]; + dpi_cmd[index++] = cmd->wptr[i]->u[1]; + } + } + if (dma_queue_submit(dev, index, dpi_cmd)) + return c; + } + return c; +} + static int otx2_dpi_rawdev_configure(const struct rte_rawdev *dev, rte_rawdev_obj_t config) { @@ -108,6 +273,7 @@ otx2_dpi_rawdev_configure(const struct rte_rawdev *dev, rte_rawdev_obj_t config) static const struct rte_rawdev_ops dpi_rawdev_ops = { .dev_configure = otx2_dpi_rawdev_configure, + .enqueue_bufs = otx2_dpi_rawdev_enqueue_bufs, }; static int -- 2.20.1