diff options
author | Max Gurtovoy <mgurtovoy@nvidia.com> | 2022-03-08 17:55:45 +0300 |
---|---|---|
committer | Jason Gunthorpe <jgg@nvidia.com> | 2022-03-18 20:37:49 +0300 |
commit | 80303ee244907e720544da83e10fd0552875a6f0 (patch) | |
tree | 3fbeebbbc4e0a0c7acf834db13b100b326c65f29 | |
parent | ee4efeaea8837bb7018d188a9eb8837c7ff79561 (diff) | |
download | linux-80303ee244907e720544da83e10fd0552875a6f0.tar.xz |
IB/iser: Generalize map/unmap dma tasks
Avoid code duplication and add the mapping/unmapping of the protection
buffers to the iser_dma_map_task_data/iser_dma_unmap_task_data functions.
Link: https://lore.kernel.org/r/20220308145546.8372-4-mgurtovoy@nvidia.com
Reviewed-by: Sergey Gorenko <sergeygo@nvidia.com>
Signed-off-by: Max Gurtovoy <mgurtovoy@nvidia.com>
Acked-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
-rw-r--r-- | drivers/infiniband/ulp/iser/iscsi_iser.h | 5 | ||||
-rw-r--r-- | drivers/infiniband/ulp/iser/iser_initiator.c | 40 | ||||
-rw-r--r-- | drivers/infiniband/ulp/iser/iser_memory.c | 31 |
3 files changed, 31 insertions, 45 deletions
diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.h b/drivers/infiniband/ulp/iser/iscsi_iser.h index 23b922233006..7e4faf9c5e9e 100644 --- a/drivers/infiniband/ulp/iser/iscsi_iser.h +++ b/drivers/infiniband/ulp/iser/iscsi_iser.h @@ -531,13 +531,12 @@ int iser_post_recvm(struct iser_conn *iser_conn, int iser_post_send(struct ib_conn *ib_conn, struct iser_tx_desc *tx_desc); int iser_dma_map_task_data(struct iscsi_iser_task *iser_task, - struct iser_data_buf *data, enum iser_data_dir iser_dir, enum dma_data_direction dma_dir); void iser_dma_unmap_task_data(struct iscsi_iser_task *iser_task, - struct iser_data_buf *data, - enum dma_data_direction dir); + enum iser_data_dir iser_dir, + enum dma_data_direction dma_dir); int iser_initialize_task_headers(struct iscsi_task *task, struct iser_tx_desc *tx_desc); diff --git a/drivers/infiniband/ulp/iser/iser_initiator.c b/drivers/infiniband/ulp/iser/iser_initiator.c index 012decf6905a..dbc2c268bc0e 100644 --- a/drivers/infiniband/ulp/iser/iser_initiator.c +++ b/drivers/infiniband/ulp/iser/iser_initiator.c @@ -52,26 +52,13 @@ static int iser_prepare_read_cmd(struct iscsi_task *task) struct iser_mem_reg *mem_reg; int err; struct iser_ctrl *hdr = &iser_task->desc.iser_header; - struct iser_data_buf *buf_in = &iser_task->data[ISER_DIR_IN]; err = iser_dma_map_task_data(iser_task, - buf_in, ISER_DIR_IN, DMA_FROM_DEVICE); if (err) return err; - if (scsi_prot_sg_count(iser_task->sc)) { - struct iser_data_buf *pbuf_in = &iser_task->prot[ISER_DIR_IN]; - - err = iser_dma_map_task_data(iser_task, - pbuf_in, - ISER_DIR_IN, - DMA_FROM_DEVICE); - if (err) - return err; - } - err = iser_reg_mem_fastreg(iser_task, ISER_DIR_IN, false); if (err) { iser_err("Failed to set up Data-IN RDMA\n"); @@ -106,23 +93,11 @@ static int iser_prepare_write_cmd(struct iscsi_task *task, unsigned int imm_sz, struct ib_sge *tx_dsg = &iser_task->desc.tx_sg[1]; err = iser_dma_map_task_data(iser_task, - buf_out, ISER_DIR_OUT, DMA_TO_DEVICE); if (err) return err; - if (scsi_prot_sg_count(iser_task->sc)) { - struct iser_data_buf *pbuf_out = &iser_task->prot[ISER_DIR_OUT]; - - err = iser_dma_map_task_data(iser_task, - pbuf_out, - ISER_DIR_OUT, - DMA_TO_DEVICE); - if (err) - return err; - } - err = iser_reg_mem_fastreg(iser_task, ISER_DIR_OUT, buf_out->data_len == imm_sz); if (err != 0) { @@ -740,27 +715,16 @@ void iser_task_rdma_init(struct iscsi_iser_task *iser_task) void iser_task_rdma_finalize(struct iscsi_iser_task *iser_task) { - int prot_count = scsi_prot_sg_count(iser_task->sc); if (iser_task->dir[ISER_DIR_IN]) { iser_unreg_mem_fastreg(iser_task, ISER_DIR_IN); - iser_dma_unmap_task_data(iser_task, - &iser_task->data[ISER_DIR_IN], + iser_dma_unmap_task_data(iser_task, ISER_DIR_IN, DMA_FROM_DEVICE); - if (prot_count) - iser_dma_unmap_task_data(iser_task, - &iser_task->prot[ISER_DIR_IN], - DMA_FROM_DEVICE); } if (iser_task->dir[ISER_DIR_OUT]) { iser_unreg_mem_fastreg(iser_task, ISER_DIR_OUT); - iser_dma_unmap_task_data(iser_task, - &iser_task->data[ISER_DIR_OUT], + iser_dma_unmap_task_data(iser_task, ISER_DIR_OUT, DMA_TO_DEVICE); - if (prot_count) - iser_dma_unmap_task_data(iser_task, - &iser_task->prot[ISER_DIR_OUT], - DMA_TO_DEVICE); } } diff --git a/drivers/infiniband/ulp/iser/iser_memory.c b/drivers/infiniband/ulp/iser/iser_memory.c index 7ec63f4a4663..29ae2c6a250a 100644 --- a/drivers/infiniband/ulp/iser/iser_memory.c +++ b/drivers/infiniband/ulp/iser/iser_memory.c @@ -70,10 +70,10 @@ static void iser_reg_desc_put_fr(struct ib_conn *ib_conn, } int iser_dma_map_task_data(struct iscsi_iser_task *iser_task, - struct iser_data_buf *data, enum iser_data_dir iser_dir, enum dma_data_direction dma_dir) { + struct iser_data_buf *data = &iser_task->data[iser_dir]; struct ib_device *dev; iser_task->dir[iser_dir] = 1; @@ -84,17 +84,40 @@ int iser_dma_map_task_data(struct iscsi_iser_task *iser_task, iser_err("dma_map_sg failed!!!\n"); return -EINVAL; } + + if (scsi_prot_sg_count(iser_task->sc)) { + struct iser_data_buf *pdata = &iser_task->prot[iser_dir]; + + pdata->dma_nents = ib_dma_map_sg(dev, pdata->sg, pdata->size, dma_dir); + if (unlikely(pdata->dma_nents == 0)) { + iser_err("protection dma_map_sg failed!!!\n"); + goto out_unmap; + } + } + return 0; + +out_unmap: + ib_dma_unmap_sg(dev, data->sg, data->size, dma_dir); + return -EINVAL; } + void iser_dma_unmap_task_data(struct iscsi_iser_task *iser_task, - struct iser_data_buf *data, - enum dma_data_direction dir) + enum iser_data_dir iser_dir, + enum dma_data_direction dma_dir) { + struct iser_data_buf *data = &iser_task->data[iser_dir]; struct ib_device *dev; dev = iser_task->iser_conn->ib_conn.device->ib_device; - ib_dma_unmap_sg(dev, data->sg, data->size, dir); + ib_dma_unmap_sg(dev, data->sg, data->size, dma_dir); + + if (scsi_prot_sg_count(iser_task->sc)) { + struct iser_data_buf *pdata = &iser_task->prot[iser_dir]; + + ib_dma_unmap_sg(dev, pdata->sg, pdata->size, dma_dir); + } } static int iser_reg_dma(struct iser_device *device, struct iser_data_buf *mem, |