diff options
| -rw-r--r-- | drivers/infiniband/ulp/srp/ib_srp.c | 62 | ||||
| -rw-r--r-- | drivers/infiniband/ulp/srp/ib_srp.h | 6 |
2 files changed, 13 insertions, 55 deletions
diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c index b7feb7424097..acda65936588 100644 --- a/drivers/infiniband/ulp/srp/ib_srp.c +++ b/drivers/infiniband/ulp/srp/ib_srp.c @@ -1364,15 +1364,6 @@ static int srp_finish_mapping(struct srp_map_state *state, return ret; } -static void srp_map_update_start(struct srp_map_state *state, - struct scatterlist *sg, int sg_index, - dma_addr_t dma_addr) -{ - state->unmapped_sg = sg; - state->unmapped_index = sg_index; - state->unmapped_addr = dma_addr; -} - static int srp_map_sg_entry(struct srp_map_state *state, struct srp_rdma_ch *ch, struct scatterlist *sg, int sg_index, @@ -1399,23 +1390,12 @@ static int srp_map_sg_entry(struct srp_map_state *state, return 0; } - /* - * If this is the first sg that will be mapped via FMR or via FR, save - * our position. We need to know the first unmapped entry, its index, - * and the first unmapped address within that entry to be able to - * restart mapping after an error. - */ - if (!state->unmapped_sg) - srp_map_update_start(state, sg, sg_index, dma_addr); - while (dma_len) { unsigned offset = dma_addr & ~dev->mr_page_mask; if (state->npages == dev->max_pages_per_mr || offset != 0) { ret = srp_finish_mapping(state, ch); if (ret) return ret; - - srp_map_update_start(state, sg, sg_index, dma_addr); } len = min_t(unsigned int, dma_len, dev->mr_page_size - offset); @@ -1434,11 +1414,8 @@ static int srp_map_sg_entry(struct srp_map_state *state, * boundries. */ ret = 0; - if (len != dev->mr_page_size) { + if (len != dev->mr_page_size) ret = srp_finish_mapping(state, ch); - if (!ret) - srp_map_update_start(state, NULL, 0, 0); - } return ret; } @@ -1448,9 +1425,8 @@ static int srp_map_sg(struct srp_map_state *state, struct srp_rdma_ch *ch, { struct srp_target_port *target = ch->target; struct srp_device *dev = target->srp_host->srp_dev; - struct ib_device *ibdev = dev->dev; struct scatterlist *sg; - int i; + int i, ret; bool use_mr; state->desc = req->indirect_desc; @@ -1466,34 +1442,22 @@ static int srp_map_sg(struct srp_map_state *state, struct srp_rdma_ch *ch, } for_each_sg(scat, sg, count, i) { - if (srp_map_sg_entry(state, ch, sg, i, use_mr)) { - /* - * Memory registration failed, so backtrack to the - * first unmapped entry and continue on without using - * memory registration. - */ - dma_addr_t dma_addr; - unsigned int dma_len; - -backtrack: - sg = state->unmapped_sg; - i = state->unmapped_index; - - dma_addr = ib_sg_dma_address(ibdev, sg); - dma_len = ib_sg_dma_len(ibdev, sg); - dma_len -= (state->unmapped_addr - dma_addr); - dma_addr = state->unmapped_addr; - use_mr = false; - srp_map_desc(state, dma_addr, dma_len, target->rkey); - } + ret = srp_map_sg_entry(state, ch, sg, i, use_mr); + if (ret) + goto out; } - if (use_mr && srp_finish_mapping(state, ch)) - goto backtrack; + if (use_mr) { + ret = srp_finish_mapping(state, ch); + if (ret) + goto out; + } req->nmdesc = state->nmdesc; + ret = 0; - return 0; +out: + return ret; } static int srp_map_data(struct scsi_cmnd *scmnd, struct srp_rdma_ch *ch, diff --git a/drivers/infiniband/ulp/srp/ib_srp.h b/drivers/infiniband/ulp/srp/ib_srp.h index 2ab73bc76da1..1e424181fdf8 100644 --- a/drivers/infiniband/ulp/srp/ib_srp.h +++ b/drivers/infiniband/ulp/srp/ib_srp.h @@ -276,9 +276,6 @@ struct srp_fr_pool { * @npages: Number of page addresses in the pages[] array. * @nmdesc: Number of FMR or FR memory descriptors used for mapping. * @ndesc: Number of SRP buffer descriptors that have been filled in. - * @unmapped_sg: First element of the sg-list that is mapped via FMR or FR. - * @unmapped_index: Index of the first element mapped via FMR or FR. - * @unmapped_addr: DMA address of the first element mapped via FMR or FR. */ struct srp_map_state { union { @@ -299,9 +296,6 @@ struct srp_map_state { unsigned int npages; unsigned int nmdesc; unsigned int ndesc; - struct scatterlist *unmapped_sg; - int unmapped_index; - dma_addr_t unmapped_addr; }; #endif /* IB_SRP_H */ |