#define ISERT_MAX_CONN 8
#define ISER_MAX_RX_CQ_LEN (ISERT_QP_MAX_RECV_DTOS * ISERT_MAX_CONN)
-#define ISER_MAX_TX_CQ_LEN (ISERT_QP_MAX_REQ_DTOS * ISERT_MAX_CONN)
+#define ISER_MAX_TX_CQ_LEN \
+ ((ISERT_QP_MAX_REQ_DTOS + ISCSI_DEF_XMIT_CMDS_MAX) * ISERT_MAX_CONN)
#define ISER_MAX_CQ_LEN (ISER_MAX_RX_CQ_LEN + ISER_MAX_TX_CQ_LEN + \
ISERT_MAX_CONN)
static struct workqueue_struct *isert_comp_wq;
static struct workqueue_struct *isert_release_wq;
-static void
-isert_unmap_cmd(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn);
-static int
-isert_map_rdma(struct isert_cmd *isert_cmd, struct iscsi_conn *conn);
-static void
-isert_unreg_rdma(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn);
-static int
-isert_reg_rdma(struct isert_cmd *isert_cmd, struct iscsi_conn *conn);
static int
isert_put_response(struct iscsi_conn *conn, struct iscsi_cmd *cmd);
static int
attr.recv_cq = comp->cq;
attr.cap.max_send_wr = ISERT_QP_MAX_REQ_DTOS + 1;
attr.cap.max_recv_wr = ISERT_QP_MAX_RECV_DTOS + 1;
+ attr.cap.max_rdma_ctxs = ISCSI_DEF_XMIT_CMDS_MAX;
attr.cap.max_send_sge = device->ib_device->attrs.max_sge;
isert_conn->max_sge = min(device->ib_device->attrs.max_sge,
device->ib_device->attrs.max_sge_rd);
device->ib_device->num_comp_vectors));
isert_info("Using %d CQs, %s supports %d vectors support "
- "Fast registration %d pi_capable %d\n",
+ "pi_capable %d\n",
device->comps_used, device->ib_device->name,
- device->ib_device->num_comp_vectors, device->use_fastreg,
+ device->ib_device->num_comp_vectors,
device->pi_capable);
device->comps = kcalloc(device->comps_used, sizeof(struct isert_comp),
isert_dbg("devattr->max_sge: %d\n", ib_dev->attrs.max_sge);
isert_dbg("devattr->max_sge_rd: %d\n", ib_dev->attrs.max_sge_rd);
- /* asign function handlers */
- if (ib_dev->attrs.device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS &&
- ib_dev->attrs.device_cap_flags & IB_DEVICE_SIGNATURE_HANDOVER) {
- device->use_fastreg = 1;
- device->reg_rdma_mem = isert_reg_rdma;
- device->unreg_rdma_mem = isert_unreg_rdma;
- } else {
- device->use_fastreg = 0;
- device->reg_rdma_mem = isert_map_rdma;
- device->unreg_rdma_mem = isert_unmap_cmd;
- }
-
ret = isert_alloc_comps(device);
if (ret)
goto out;
return device;
}
-static void
-isert_conn_free_fastreg_pool(struct isert_conn *isert_conn)
-{
- struct fast_reg_descriptor *fr_desc, *tmp;
- int i = 0;
-
- if (list_empty(&isert_conn->fr_pool))
- return;
-
- isert_info("Freeing conn %p fastreg pool", isert_conn);
-
- list_for_each_entry_safe(fr_desc, tmp,
- &isert_conn->fr_pool, list) {
- list_del(&fr_desc->list);
- ib_dereg_mr(fr_desc->data_mr);
- if (fr_desc->pi_ctx) {
- ib_dereg_mr(fr_desc->pi_ctx->prot_mr);
- ib_dereg_mr(fr_desc->pi_ctx->sig_mr);
- kfree(fr_desc->pi_ctx);
- }
- kfree(fr_desc);
- ++i;
- }
-
- if (i < isert_conn->fr_pool_size)
- isert_warn("Pool still has %d regions registered\n",
- isert_conn->fr_pool_size - i);
-}
-
-static int
-isert_create_pi_ctx(struct fast_reg_descriptor *desc,
- struct ib_device *device,
- struct ib_pd *pd)
-{
- struct pi_context *pi_ctx;
- int ret;
-
- pi_ctx = kzalloc(sizeof(*desc->pi_ctx), GFP_KERNEL);
- if (!pi_ctx) {
- isert_err("Failed to allocate pi context\n");
- return -ENOMEM;
- }
-
- pi_ctx->prot_mr = ib_alloc_mr(pd, IB_MR_TYPE_MEM_REG,
- ISCSI_ISER_SG_TABLESIZE);
- if (IS_ERR(pi_ctx->prot_mr)) {
- isert_err("Failed to allocate prot frmr err=%ld\n",
- PTR_ERR(pi_ctx->prot_mr));
- ret = PTR_ERR(pi_ctx->prot_mr);
- goto err_pi_ctx;
- }
- desc->ind |= ISERT_PROT_KEY_VALID;
-
- pi_ctx->sig_mr = ib_alloc_mr(pd, IB_MR_TYPE_SIGNATURE, 2);
- if (IS_ERR(pi_ctx->sig_mr)) {
- isert_err("Failed to allocate signature enabled mr err=%ld\n",
- PTR_ERR(pi_ctx->sig_mr));
- ret = PTR_ERR(pi_ctx->sig_mr);
- goto err_prot_mr;
- }
-
- desc->pi_ctx = pi_ctx;
- desc->ind |= ISERT_SIG_KEY_VALID;
- desc->ind &= ~ISERT_PROTECTED;
-
- return 0;
-
-err_prot_mr:
- ib_dereg_mr(pi_ctx->prot_mr);
-err_pi_ctx:
- kfree(pi_ctx);
-
- return ret;
-}
-
-static int
-isert_create_fr_desc(struct ib_device *ib_device, struct ib_pd *pd,
- struct fast_reg_descriptor *fr_desc)
-{
- fr_desc->data_mr = ib_alloc_mr(pd, IB_MR_TYPE_MEM_REG,
- ISCSI_ISER_SG_TABLESIZE);
- if (IS_ERR(fr_desc->data_mr)) {
- isert_err("Failed to allocate data frmr err=%ld\n",
- PTR_ERR(fr_desc->data_mr));
- return PTR_ERR(fr_desc->data_mr);
- }
- fr_desc->ind |= ISERT_DATA_KEY_VALID;
-
- isert_dbg("Created fr_desc %p\n", fr_desc);
-
- return 0;
-}
-
-static int
-isert_conn_create_fastreg_pool(struct isert_conn *isert_conn)
-{
- struct fast_reg_descriptor *fr_desc;
- struct isert_device *device = isert_conn->device;
- struct se_session *se_sess = isert_conn->conn->sess->se_sess;
- struct se_node_acl *se_nacl = se_sess->se_node_acl;
- int i, ret, tag_num;
- /*
- * Setup the number of FRMRs based upon the number of tags
- * available to session in iscsi_target_locate_portal().
- */
- tag_num = max_t(u32, ISCSIT_MIN_TAGS, se_nacl->queue_depth);
- tag_num = (tag_num * 2) + ISCSIT_EXTRA_TAGS;
-
- isert_conn->fr_pool_size = 0;
- for (i = 0; i < tag_num; i++) {
- fr_desc = kzalloc(sizeof(*fr_desc), GFP_KERNEL);
- if (!fr_desc) {
- isert_err("Failed to allocate fast_reg descriptor\n");
- ret = -ENOMEM;
- goto err;
- }
-
- ret = isert_create_fr_desc(device->ib_device,
- device->pd, fr_desc);
- if (ret) {
- isert_err("Failed to create fastreg descriptor err=%d\n",
- ret);
- kfree(fr_desc);
- goto err;
- }
-
- list_add_tail(&fr_desc->list, &isert_conn->fr_pool);
- isert_conn->fr_pool_size++;
- }
-
- isert_dbg("Creating conn %p fastreg pool size=%d",
- isert_conn, isert_conn->fr_pool_size);
-
- return 0;
-
-err:
- isert_conn_free_fastreg_pool(isert_conn);
- return ret;
-}
-
static void
isert_init_conn(struct isert_conn *isert_conn)
{
init_completion(&isert_conn->login_req_comp);
kref_init(&isert_conn->kref);
mutex_init(&isert_conn->mutex);
- spin_lock_init(&isert_conn->pool_lock);
- INIT_LIST_HEAD(&isert_conn->fr_pool);
INIT_WORK(&isert_conn->release_work, isert_release_work);
}
BUG_ON(!device);
- if (device->use_fastreg)
- isert_conn_free_fastreg_pool(isert_conn);
-
isert_free_rx_descriptors(isert_conn);
if (isert_conn->cm_id)
rdma_destroy_id(isert_conn->cm_id);
{
struct iser_tx_desc *tx_desc = &isert_cmd->tx_desc;
- isert_cmd->iser_ib_op = ISER_IB_SEND;
tx_desc->tx_cqe.done = isert_send_done;
send_wr->wr_cqe = &tx_desc->tx_cqe;
}
if (!login->login_failed) {
if (login->login_complete) {
- if (!conn->sess->sess_ops->SessionType &&
- isert_conn->device->use_fastreg) {
- ret = isert_conn_create_fastreg_pool(isert_conn);
- if (ret) {
- isert_err("Conn: %p failed to create"
- " fastreg pool\n", isert_conn);
- return ret;
- }
- }
-
ret = isert_alloc_rx_descriptors(isert_conn);
if (ret)
return ret;
ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE);
}
-static int
-isert_map_data_buf(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd,
- struct scatterlist *sg, u32 nents, u32 length, u32 offset,
- enum iser_ib_op_code op, struct isert_data_buf *data)
-{
- struct ib_device *ib_dev = isert_conn->cm_id->device;
-
- data->dma_dir = op == ISER_IB_RDMA_WRITE ?
- DMA_TO_DEVICE : DMA_FROM_DEVICE;
-
- data->len = length - offset;
- data->offset = offset;
- data->sg_off = data->offset / PAGE_SIZE;
-
- data->sg = &sg[data->sg_off];
- data->nents = min_t(unsigned int, nents - data->sg_off,
- ISCSI_ISER_SG_TABLESIZE);
- data->len = min_t(unsigned int, data->len, ISCSI_ISER_SG_TABLESIZE *
- PAGE_SIZE);
-
- data->dma_nents = ib_dma_map_sg(ib_dev, data->sg, data->nents,
- data->dma_dir);
- if (unlikely(!data->dma_nents)) {
- isert_err("Cmd: unable to dma map SGs %p\n", sg);
- return -EINVAL;
- }
-
- isert_dbg("Mapped cmd: %p count: %u sg: %p sg_nents: %u rdma_len %d\n",
- isert_cmd, data->dma_nents, data->sg, data->nents, data->len);
-
- return 0;
-}
-
static void
-isert_unmap_data_buf(struct isert_conn *isert_conn, struct isert_data_buf *data)
+isert_rdma_rw_ctx_destroy(struct isert_cmd *cmd, struct isert_conn *conn)
{
- struct ib_device *ib_dev = isert_conn->cm_id->device;
-
- ib_dma_unmap_sg(ib_dev, data->sg, data->nents, data->dma_dir);
- memset(data, 0, sizeof(*data));
-}
-
-
-
-static void
-isert_unmap_cmd(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn)
-{
- isert_dbg("Cmd %p\n", isert_cmd);
+ struct se_cmd *se_cmd = &cmd->iscsi_cmd->se_cmd;
+ enum dma_data_direction dir = target_reverse_dma_direction(se_cmd);
- if (isert_cmd->data.sg) {
- isert_dbg("Cmd %p unmap_sg op\n", isert_cmd);
- isert_unmap_data_buf(isert_conn, &isert_cmd->data);
- }
-
- if (isert_cmd->rdma_wr) {
- isert_dbg("Cmd %p free send_wr\n", isert_cmd);
- kfree(isert_cmd->rdma_wr);
- isert_cmd->rdma_wr = NULL;
- }
-
- if (isert_cmd->ib_sge) {
- isert_dbg("Cmd %p free ib_sge\n", isert_cmd);
- kfree(isert_cmd->ib_sge);
- isert_cmd->ib_sge = NULL;
- }
-}
-
-static void
-isert_unreg_rdma(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn)
-{
- isert_dbg("Cmd %p\n", isert_cmd);
-
- if (isert_cmd->fr_desc) {
- isert_dbg("Cmd %p free fr_desc %p\n", isert_cmd, isert_cmd->fr_desc);
- if (isert_cmd->fr_desc->ind & ISERT_PROTECTED) {
- isert_unmap_data_buf(isert_conn, &isert_cmd->prot);
- isert_cmd->fr_desc->ind &= ~ISERT_PROTECTED;
- }
- spin_lock_bh(&isert_conn->pool_lock);
- list_add_tail(&isert_cmd->fr_desc->list, &isert_conn->fr_pool);
- spin_unlock_bh(&isert_conn->pool_lock);
- isert_cmd->fr_desc = NULL;
- }
+ if (!cmd->rw.nr_ops)
+ return;
- if (isert_cmd->data.sg) {
- isert_dbg("Cmd %p unmap_sg op\n", isert_cmd);
- isert_unmap_data_buf(isert_conn, &isert_cmd->data);
+ if (isert_prot_cmd(conn, se_cmd)) {
+ rdma_rw_ctx_destroy_signature(&cmd->rw, conn->qp,
+ conn->cm_id->port_num, se_cmd->t_data_sg,
+ se_cmd->t_data_nents, se_cmd->t_prot_sg,
+ se_cmd->t_prot_nents, dir);
+ } else {
+ rdma_rw_ctx_destroy(&cmd->rw, conn->qp, conn->cm_id->port_num,
+ se_cmd->t_data_sg, se_cmd->t_data_nents, dir);
}
- isert_cmd->ib_sge = NULL;
- isert_cmd->rdma_wr = NULL;
+ cmd->rw.nr_ops = 0;
}
static void
struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd;
struct isert_conn *isert_conn = isert_cmd->conn;
struct iscsi_conn *conn = isert_conn->conn;
- struct isert_device *device = isert_conn->device;
struct iscsi_text_rsp *hdr;
isert_dbg("Cmd %p\n", isert_cmd);
}
}
- device->unreg_rdma_mem(isert_cmd, isert_conn);
+ isert_rdma_rw_ctx_destroy(isert_cmd, isert_conn);
transport_generic_free_cmd(&cmd->se_cmd, 0);
break;
case ISCSI_OP_SCSI_TMFUNC:
isert_dbg("Cmd %p\n", isert_cmd);
- if (isert_cmd->fr_desc && isert_cmd->fr_desc->ind & ISERT_PROTECTED) {
- ret = isert_check_pi_status(cmd,
- isert_cmd->fr_desc->pi_ctx->sig_mr);
- isert_cmd->fr_desc->ind &= ~ISERT_PROTECTED;
- }
+ ret = isert_check_pi_status(cmd, isert_cmd->rw.sig->sig_mr);
+ isert_rdma_rw_ctx_destroy(isert_cmd, isert_conn);
- device->unreg_rdma_mem(isert_cmd, isert_conn);
- isert_cmd->rdma_wr_num = 0;
if (ret)
transport_send_check_condition_and_sense(cmd, cmd->pi_err, 0);
else
isert_dbg("Cmd %p\n", isert_cmd);
- if (isert_cmd->fr_desc && isert_cmd->fr_desc->ind & ISERT_PROTECTED) {
- ret = isert_check_pi_status(se_cmd,
- isert_cmd->fr_desc->pi_ctx->sig_mr);
- isert_cmd->fr_desc->ind &= ~ISERT_PROTECTED;
- }
-
iscsit_stop_dataout_timer(cmd);
- device->unreg_rdma_mem(isert_cmd, isert_conn);
- cmd->write_data_done = isert_cmd->data.len;
- isert_cmd->rdma_wr_num = 0;
+
+ if (isert_prot_cmd(isert_conn, se_cmd))
+ ret = isert_check_pi_status(se_cmd, isert_cmd->rw.sig->sig_mr);
+ isert_rdma_rw_ctx_destroy(isert_cmd, isert_conn);
+ cmd->write_data_done = 0;
isert_dbg("Cmd: %p RDMA_READ comp calling execute_cmd\n", isert_cmd);
spin_lock_bh(&cmd->istate_lock);
{
struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd);
struct isert_conn *isert_conn = conn->context;
- struct isert_device *device = isert_conn->device;
spin_lock_bh(&conn->cmd_lock);
if (!list_empty(&cmd->i_conn_node))
if (cmd->data_direction == DMA_TO_DEVICE)
iscsit_stop_dataout_timer(cmd);
-
- device->unreg_rdma_mem(isert_cmd, isert_conn);
+ isert_rdma_rw_ctx_destroy(isert_cmd, isert_conn);
}
static enum target_prot_op
return isert_post_response(isert_conn, isert_cmd);
}
-static int
-isert_build_rdma_wr(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd,
- struct ib_sge *ib_sge, struct ib_rdma_wr *rdma_wr,
- u32 data_left, u32 offset)
-{
- struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd;
- struct scatterlist *sg_start, *tmp_sg;
- struct isert_device *device = isert_conn->device;
- struct ib_device *ib_dev = device->ib_device;
- u32 sg_off, page_off;
- int i = 0, sg_nents;
-
- sg_off = offset / PAGE_SIZE;
- sg_start = &cmd->se_cmd.t_data_sg[sg_off];
- sg_nents = min(cmd->se_cmd.t_data_nents - sg_off, isert_conn->max_sge);
- page_off = offset % PAGE_SIZE;
-
- rdma_wr->wr.sg_list = ib_sge;
- rdma_wr->wr.wr_cqe = &isert_cmd->tx_desc.tx_cqe;
-
- /*
- * Perform mapping of TCM scatterlist memory ib_sge dma_addr.
- */
- for_each_sg(sg_start, tmp_sg, sg_nents, i) {
- isert_dbg("RDMA from SGL dma_addr: 0x%llx dma_len: %u, "
- "page_off: %u\n",
- (unsigned long long)tmp_sg->dma_address,
- tmp_sg->length, page_off);
-
- ib_sge->addr = ib_sg_dma_address(ib_dev, tmp_sg) + page_off;
- ib_sge->length = min_t(u32, data_left,
- ib_sg_dma_len(ib_dev, tmp_sg) - page_off);
- ib_sge->lkey = device->pd->local_dma_lkey;
-
- isert_dbg("RDMA ib_sge: addr: 0x%llx length: %u lkey: %x\n",
- ib_sge->addr, ib_sge->length, ib_sge->lkey);
- page_off = 0;
- data_left -= ib_sge->length;
- if (!data_left)
- break;
- ib_sge++;
- isert_dbg("Incrementing ib_sge pointer to %p\n", ib_sge);
- }
-
- rdma_wr->wr.num_sge = ++i;
- isert_dbg("Set outgoing sg_list: %p num_sg: %u from TCM SGLs\n",
- rdma_wr->wr.sg_list, rdma_wr->wr.num_sge);
-
- return rdma_wr->wr.num_sge;
-}
-
-static int
-isert_map_rdma(struct isert_cmd *isert_cmd, struct iscsi_conn *conn)
-{
- struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd;
- struct se_cmd *se_cmd = &cmd->se_cmd;
- struct isert_conn *isert_conn = conn->context;
- struct isert_data_buf *data = &isert_cmd->data;
- struct ib_rdma_wr *rdma_wr;
- struct ib_sge *ib_sge;
- u32 offset, data_len, data_left, rdma_write_max, va_offset = 0;
- int ret = 0, i, ib_sge_cnt;
-
- offset = isert_cmd->iser_ib_op == ISER_IB_RDMA_READ ?
- cmd->write_data_done : 0;
- ret = isert_map_data_buf(isert_conn, isert_cmd, se_cmd->t_data_sg,
- se_cmd->t_data_nents, se_cmd->data_length,
- offset, isert_cmd->iser_ib_op,
- &isert_cmd->data);
- if (ret)
- return ret;
-
- data_left = data->len;
- offset = data->offset;
-
- ib_sge = kzalloc(sizeof(struct ib_sge) * data->nents, GFP_KERNEL);
- if (!ib_sge) {
- isert_warn("Unable to allocate ib_sge\n");
- ret = -ENOMEM;
- goto unmap_cmd;
- }
- isert_cmd->ib_sge = ib_sge;
-
- isert_cmd->rdma_wr_num = DIV_ROUND_UP(data->nents, isert_conn->max_sge);
- isert_cmd->rdma_wr = kzalloc(sizeof(struct ib_rdma_wr) *
- isert_cmd->rdma_wr_num, GFP_KERNEL);
- if (!isert_cmd->rdma_wr) {
- isert_dbg("Unable to allocate isert_cmd->rdma_wr\n");
- ret = -ENOMEM;
- goto unmap_cmd;
- }
-
- rdma_write_max = isert_conn->max_sge * PAGE_SIZE;
-
- for (i = 0; i < isert_cmd->rdma_wr_num; i++) {
- rdma_wr = &isert_cmd->rdma_wr[i];
- data_len = min(data_left, rdma_write_max);
-
- rdma_wr->wr.send_flags = 0;
- if (isert_cmd->iser_ib_op == ISER_IB_RDMA_WRITE) {
- isert_cmd->tx_desc.tx_cqe.done = isert_rdma_write_done;
-
- rdma_wr->wr.opcode = IB_WR_RDMA_WRITE;
- rdma_wr->remote_addr = isert_cmd->read_va + offset;
- rdma_wr->rkey = isert_cmd->read_stag;
- if (i + 1 == isert_cmd->rdma_wr_num)
- rdma_wr->wr.next = &isert_cmd->tx_desc.send_wr;
- else
- rdma_wr->wr.next = &isert_cmd->rdma_wr[i + 1].wr;
- } else {
- isert_cmd->tx_desc.tx_cqe.done = isert_rdma_read_done;
-
- rdma_wr->wr.opcode = IB_WR_RDMA_READ;
- rdma_wr->remote_addr = isert_cmd->write_va + va_offset;
- rdma_wr->rkey = isert_cmd->write_stag;
- if (i + 1 == isert_cmd->rdma_wr_num)
- rdma_wr->wr.send_flags = IB_SEND_SIGNALED;
- else
- rdma_wr->wr.next = &isert_cmd->rdma_wr[i + 1].wr;
- }
-
- ib_sge_cnt = isert_build_rdma_wr(isert_conn, isert_cmd, ib_sge,
- rdma_wr, data_len, offset);
- ib_sge += ib_sge_cnt;
-
- offset += data_len;
- va_offset += data_len;
- data_left -= data_len;
- }
-
- return 0;
-unmap_cmd:
- isert_unmap_data_buf(isert_conn, data);
-
- return ret;
-}
-
-static inline void
-isert_inv_rkey(struct ib_send_wr *inv_wr, struct ib_mr *mr)
-{
- u32 rkey;
-
- memset(inv_wr, 0, sizeof(*inv_wr));
- inv_wr->wr_cqe = NULL;
- inv_wr->opcode = IB_WR_LOCAL_INV;
- inv_wr->ex.invalidate_rkey = mr->rkey;
-
- /* Bump the key */
- rkey = ib_inc_rkey(mr->rkey);
- ib_update_fast_reg_key(mr, rkey);
-}
-
-static int
-isert_fast_reg_mr(struct isert_conn *isert_conn,
- struct fast_reg_descriptor *fr_desc,
- struct isert_data_buf *mem,
- enum isert_indicator ind,
- struct ib_sge *sge)
-{
- struct isert_device *device = isert_conn->device;
- struct ib_device *ib_dev = device->ib_device;
- struct ib_mr *mr;
- struct ib_reg_wr reg_wr;
- struct ib_send_wr inv_wr, *bad_wr, *wr = NULL;
- int ret, n;
-
- if (mem->dma_nents == 1) {
- sge->lkey = device->pd->local_dma_lkey;
- sge->addr = ib_sg_dma_address(ib_dev, &mem->sg[0]);
- sge->length = ib_sg_dma_len(ib_dev, &mem->sg[0]);
- isert_dbg("sge: addr: 0x%llx length: %u lkey: %x\n",
- sge->addr, sge->length, sge->lkey);
- return 0;
- }
-
- if (ind == ISERT_DATA_KEY_VALID)
- /* Registering data buffer */
- mr = fr_desc->data_mr;
- else
- /* Registering protection buffer */
- mr = fr_desc->pi_ctx->prot_mr;
-
- if (!(fr_desc->ind & ind)) {
- isert_inv_rkey(&inv_wr, mr);
- wr = &inv_wr;
- }
-
- n = ib_map_mr_sg(mr, mem->sg, mem->nents, PAGE_SIZE);
- if (unlikely(n != mem->nents)) {
- isert_err("failed to map mr sg (%d/%d)\n",
- n, mem->nents);
- return n < 0 ? n : -EINVAL;
- }
-
- isert_dbg("Use fr_desc %p sg_nents %d offset %u\n",
- fr_desc, mem->nents, mem->offset);
-
- reg_wr.wr.next = NULL;
- reg_wr.wr.opcode = IB_WR_REG_MR;
- reg_wr.wr.wr_cqe = NULL;
- reg_wr.wr.send_flags = 0;
- reg_wr.wr.num_sge = 0;
- reg_wr.mr = mr;
- reg_wr.key = mr->lkey;
- reg_wr.access = IB_ACCESS_LOCAL_WRITE;
-
- if (!wr)
- wr = ®_wr.wr;
- else
- wr->next = ®_wr.wr;
-
- ret = ib_post_send(isert_conn->qp, wr, &bad_wr);
- if (ret) {
- isert_err("fast registration failed, ret:%d\n", ret);
- return ret;
- }
- fr_desc->ind &= ~ind;
-
- sge->lkey = mr->lkey;
- sge->addr = mr->iova;
- sge->length = mr->length;
-
- isert_dbg("sge: addr: 0x%llx length: %u lkey: %x\n",
- sge->addr, sge->length, sge->lkey);
-
- return ret;
-}
-
static inline void
isert_set_dif_domain(struct se_cmd *se_cmd, struct ib_sig_attrs *sig_attrs,
struct ib_sig_domain *domain)
static int
isert_set_sig_attrs(struct se_cmd *se_cmd, struct ib_sig_attrs *sig_attrs)
{
+ memset(sig_attrs, 0, sizeof(*sig_attrs));
+
switch (se_cmd->prot_op) {
case TARGET_PROT_DIN_INSERT:
case TARGET_PROT_DOUT_STRIP:
return -EINVAL;
}
+ sig_attrs->check_mask =
+ (se_cmd->prot_checks & TARGET_DIF_CHECK_GUARD ? 0xc0 : 0) |
+ (se_cmd->prot_checks & TARGET_DIF_CHECK_REFTAG ? 0x30 : 0) |
+ (se_cmd->prot_checks & TARGET_DIF_CHECK_REFTAG ? 0x0f : 0);
return 0;
}
-static inline u8
-isert_set_prot_checks(u8 prot_checks)
-{
- return (prot_checks & TARGET_DIF_CHECK_GUARD ? 0xc0 : 0) |
- (prot_checks & TARGET_DIF_CHECK_REFTAG ? 0x30 : 0) |
- (prot_checks & TARGET_DIF_CHECK_REFTAG ? 0x0f : 0);
-}
-
-static int
-isert_reg_sig_mr(struct isert_conn *isert_conn,
- struct isert_cmd *isert_cmd,
- struct fast_reg_descriptor *fr_desc)
-{
- struct se_cmd *se_cmd = &isert_cmd->iscsi_cmd->se_cmd;
- struct ib_sig_handover_wr sig_wr;
- struct ib_send_wr inv_wr, *bad_wr, *wr = NULL;
- struct pi_context *pi_ctx = fr_desc->pi_ctx;
- struct ib_sig_attrs sig_attrs;
- int ret;
-
- memset(&sig_attrs, 0, sizeof(sig_attrs));
- ret = isert_set_sig_attrs(se_cmd, &sig_attrs);
- if (ret)
- goto err;
-
- sig_attrs.check_mask = isert_set_prot_checks(se_cmd->prot_checks);
-
- if (!(fr_desc->ind & ISERT_SIG_KEY_VALID)) {
- isert_inv_rkey(&inv_wr, pi_ctx->sig_mr);
- wr = &inv_wr;
- }
-
- memset(&sig_wr, 0, sizeof(sig_wr));
- sig_wr.wr.opcode = IB_WR_REG_SIG_MR;
- sig_wr.wr.wr_cqe = NULL;
- sig_wr.wr.sg_list = &isert_cmd->ib_sg[DATA];
- sig_wr.wr.num_sge = 1;
- sig_wr.access_flags = IB_ACCESS_LOCAL_WRITE;
- sig_wr.sig_attrs = &sig_attrs;
- sig_wr.sig_mr = pi_ctx->sig_mr;
- if (se_cmd->t_prot_sg)
- sig_wr.prot = &isert_cmd->ib_sg[PROT];
-
- if (!wr)
- wr = &sig_wr.wr;
- else
- wr->next = &sig_wr.wr;
-
- ret = ib_post_send(isert_conn->qp, wr, &bad_wr);
- if (ret) {
- isert_err("fast registration failed, ret:%d\n", ret);
- goto err;
- }
- fr_desc->ind &= ~ISERT_SIG_KEY_VALID;
-
- isert_cmd->ib_sg[SIG].lkey = pi_ctx->sig_mr->lkey;
- isert_cmd->ib_sg[SIG].addr = 0;
- isert_cmd->ib_sg[SIG].length = se_cmd->data_length;
- if (se_cmd->prot_op != TARGET_PROT_DIN_STRIP &&
- se_cmd->prot_op != TARGET_PROT_DOUT_INSERT)
- /*
- * We have protection guards on the wire
- * so we need to set a larget transfer
- */
- isert_cmd->ib_sg[SIG].length += se_cmd->prot_length;
-
- isert_dbg("sig_sge: addr: 0x%llx length: %u lkey: %x\n",
- isert_cmd->ib_sg[SIG].addr, isert_cmd->ib_sg[SIG].length,
- isert_cmd->ib_sg[SIG].lkey);
-err:
- return ret;
-}
-
static int
-isert_handle_prot_cmd(struct isert_conn *isert_conn,
- struct isert_cmd *isert_cmd)
-{
- struct isert_device *device = isert_conn->device;
- struct se_cmd *se_cmd = &isert_cmd->iscsi_cmd->se_cmd;
+isert_rdma_rw_ctx_post(struct isert_cmd *cmd, struct isert_conn *conn,
+ struct ib_cqe *cqe, struct ib_send_wr *chain_wr)
+{
+ struct se_cmd *se_cmd = &cmd->iscsi_cmd->se_cmd;
+ enum dma_data_direction dir = target_reverse_dma_direction(se_cmd);
+ u8 port_num = conn->cm_id->port_num;
+ u64 addr;
+ u32 rkey, offset;
int ret;
- if (!isert_cmd->fr_desc->pi_ctx) {
- ret = isert_create_pi_ctx(isert_cmd->fr_desc,
- device->ib_device,
- device->pd);
- if (ret) {
- isert_err("conn %p failed to allocate pi_ctx\n",
- isert_conn);
- return ret;
- }
- }
-
- if (se_cmd->t_prot_sg) {
- ret = isert_map_data_buf(isert_conn, isert_cmd,
- se_cmd->t_prot_sg,
- se_cmd->t_prot_nents,
- se_cmd->prot_length,
- 0,
- isert_cmd->iser_ib_op,
- &isert_cmd->prot);
- if (ret) {
- isert_err("conn %p failed to map protection buffer\n",
- isert_conn);
- return ret;
- }
-
- memset(&isert_cmd->ib_sg[PROT], 0, sizeof(isert_cmd->ib_sg[PROT]));
- ret = isert_fast_reg_mr(isert_conn, isert_cmd->fr_desc,
- &isert_cmd->prot,
- ISERT_PROT_KEY_VALID,
- &isert_cmd->ib_sg[PROT]);
- if (ret) {
- isert_err("conn %p failed to fast reg mr\n",
- isert_conn);
- goto unmap_prot_cmd;
- }
- }
-
- ret = isert_reg_sig_mr(isert_conn, isert_cmd, isert_cmd->fr_desc);
- if (ret) {
- isert_err("conn %p failed to fast reg mr\n",
- isert_conn);
- goto unmap_prot_cmd;
- }
- isert_cmd->fr_desc->ind |= ISERT_PROTECTED;
-
- return 0;
-
-unmap_prot_cmd:
- if (se_cmd->t_prot_sg)
- isert_unmap_data_buf(isert_conn, &isert_cmd->prot);
-
- return ret;
-}
-
-static int
-isert_reg_rdma(struct isert_cmd *isert_cmd, struct iscsi_conn *conn)
-{
- struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd;
- struct se_cmd *se_cmd = &cmd->se_cmd;
- struct isert_conn *isert_conn = conn->context;
- struct fast_reg_descriptor *fr_desc = NULL;
- struct ib_rdma_wr *rdma_wr;
- struct ib_sge *ib_sg;
- u32 offset;
- int ret = 0;
- unsigned long flags;
-
- offset = isert_cmd->iser_ib_op == ISER_IB_RDMA_READ ?
- cmd->write_data_done : 0;
- ret = isert_map_data_buf(isert_conn, isert_cmd, se_cmd->t_data_sg,
- se_cmd->t_data_nents, se_cmd->data_length,
- offset, isert_cmd->iser_ib_op,
- &isert_cmd->data);
- if (ret)
- return ret;
-
- if (isert_cmd->data.dma_nents != 1 ||
- isert_prot_cmd(isert_conn, se_cmd)) {
- spin_lock_irqsave(&isert_conn->pool_lock, flags);
- fr_desc = list_first_entry(&isert_conn->fr_pool,
- struct fast_reg_descriptor, list);
- list_del(&fr_desc->list);
- spin_unlock_irqrestore(&isert_conn->pool_lock, flags);
- isert_cmd->fr_desc = fr_desc;
- }
-
- ret = isert_fast_reg_mr(isert_conn, fr_desc, &isert_cmd->data,
- ISERT_DATA_KEY_VALID, &isert_cmd->ib_sg[DATA]);
- if (ret)
- goto unmap_cmd;
-
- if (isert_prot_cmd(isert_conn, se_cmd)) {
- ret = isert_handle_prot_cmd(isert_conn, isert_cmd);
- if (ret)
- goto unmap_cmd;
-
- ib_sg = &isert_cmd->ib_sg[SIG];
+ if (dir == DMA_FROM_DEVICE) {
+ addr = cmd->write_va;
+ rkey = cmd->write_stag;
+ offset = cmd->iscsi_cmd->write_data_done;
} else {
- ib_sg = &isert_cmd->ib_sg[DATA];
+ addr = cmd->read_va;
+ rkey = cmd->read_stag;
+ offset = 0;
}
- memcpy(&isert_cmd->s_ib_sge, ib_sg, sizeof(*ib_sg));
- isert_cmd->ib_sge = &isert_cmd->s_ib_sge;
- isert_cmd->rdma_wr_num = 1;
- memset(&isert_cmd->s_rdma_wr, 0, sizeof(isert_cmd->s_rdma_wr));
- isert_cmd->rdma_wr = &isert_cmd->s_rdma_wr;
+ if (isert_prot_cmd(conn, se_cmd)) {
+ struct ib_sig_attrs sig_attrs;
- rdma_wr = &isert_cmd->s_rdma_wr;
- rdma_wr->wr.sg_list = &isert_cmd->s_ib_sge;
- rdma_wr->wr.num_sge = 1;
- rdma_wr->wr.wr_cqe = &isert_cmd->tx_desc.tx_cqe;
- if (isert_cmd->iser_ib_op == ISER_IB_RDMA_WRITE) {
- isert_cmd->tx_desc.tx_cqe.done = isert_rdma_write_done;
+ ret = isert_set_sig_attrs(se_cmd, &sig_attrs);
+ if (ret)
+ return ret;
- rdma_wr->wr.opcode = IB_WR_RDMA_WRITE;
- rdma_wr->remote_addr = isert_cmd->read_va;
- rdma_wr->rkey = isert_cmd->read_stag;
- rdma_wr->wr.send_flags = !isert_prot_cmd(isert_conn, se_cmd) ?
- 0 : IB_SEND_SIGNALED;
+ WARN_ON_ONCE(offset);
+ ret = rdma_rw_ctx_signature_init(&cmd->rw, conn->qp, port_num,
+ se_cmd->t_data_sg, se_cmd->t_data_nents,
+ se_cmd->t_prot_sg, se_cmd->t_prot_nents,
+ &sig_attrs, addr, rkey, dir);
} else {
- isert_cmd->tx_desc.tx_cqe.done = isert_rdma_read_done;
-
- rdma_wr->wr.opcode = IB_WR_RDMA_READ;
- rdma_wr->remote_addr = isert_cmd->write_va;
- rdma_wr->rkey = isert_cmd->write_stag;
- rdma_wr->wr.send_flags = IB_SEND_SIGNALED;
+ ret = rdma_rw_ctx_init(&cmd->rw, conn->qp, port_num,
+ se_cmd->t_data_sg, se_cmd->t_data_nents,
+ offset, addr, rkey, dir);
}
-
- return 0;
-
-unmap_cmd:
- if (fr_desc) {
- spin_lock_irqsave(&isert_conn->pool_lock, flags);
- list_add_tail(&fr_desc->list, &isert_conn->fr_pool);
- spin_unlock_irqrestore(&isert_conn->pool_lock, flags);
+ if (ret < 0) {
+ isert_err("Cmd: %p failed to prepare RDMA res\n", cmd);
+ return ret;
}
- isert_unmap_data_buf(isert_conn, &isert_cmd->data);
+ ret = rdma_rw_ctx_post(&cmd->rw, conn->qp, port_num, cqe, chain_wr);
+ if (ret < 0)
+ isert_err("Cmd: %p failed to post RDMA res\n", cmd);
return ret;
}
struct se_cmd *se_cmd = &cmd->se_cmd;
struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd);
struct isert_conn *isert_conn = conn->context;
- struct isert_device *device = isert_conn->device;
- struct ib_send_wr *wr_failed;
+ struct ib_cqe *cqe = NULL;
+ struct ib_send_wr *chain_wr = NULL;
int rc;
isert_dbg("Cmd: %p RDMA_WRITE data_length: %u\n",
isert_cmd, se_cmd->data_length);
- isert_cmd->iser_ib_op = ISER_IB_RDMA_WRITE;
- rc = device->reg_rdma_mem(isert_cmd, conn);
- if (rc) {
- isert_err("Cmd: %p failed to prepare RDMA res\n", isert_cmd);
- return rc;
- }
-
- if (!isert_prot_cmd(isert_conn, se_cmd)) {
+ if (isert_prot_cmd(isert_conn, se_cmd)) {
+ isert_cmd->tx_desc.tx_cqe.done = isert_rdma_write_done;
+ cqe = &isert_cmd->tx_desc.tx_cqe;
+ } else {
/*
* Build isert_conn->tx_desc for iSCSI response PDU and attach
*/
isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc);
isert_init_send_wr(isert_conn, isert_cmd,
&isert_cmd->tx_desc.send_wr);
- isert_cmd->s_rdma_wr.wr.next = &isert_cmd->tx_desc.send_wr;
- isert_cmd->rdma_wr_num += 1;
rc = isert_post_recv(isert_conn, isert_cmd->rx_desc);
if (rc) {
isert_err("ib_post_recv failed with %d\n", rc);
return rc;
}
- }
- rc = ib_post_send(isert_conn->qp, &isert_cmd->rdma_wr->wr, &wr_failed);
- if (rc)
- isert_warn("ib_post_send() failed for IB_WR_RDMA_WRITE\n");
-
- if (!isert_prot_cmd(isert_conn, se_cmd))
- isert_dbg("Cmd: %p posted RDMA_WRITE + Response for iSER Data "
- "READ\n", isert_cmd);
- else
- isert_dbg("Cmd: %p posted RDMA_WRITE for iSER Data READ\n",
- isert_cmd);
+ chain_wr = &isert_cmd->tx_desc.send_wr;
+ }
+ isert_rdma_rw_ctx_post(isert_cmd, isert_conn, cqe, chain_wr);
+ isert_dbg("Cmd: %p posted RDMA_WRITE for iSER Data READ\n", isert_cmd);
return 1;
}
static int
isert_get_dataout(struct iscsi_conn *conn, struct iscsi_cmd *cmd, bool recovery)
{
- struct se_cmd *se_cmd = &cmd->se_cmd;
struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd);
- struct isert_conn *isert_conn = conn->context;
- struct isert_device *device = isert_conn->device;
- struct ib_send_wr *wr_failed;
- int rc;
isert_dbg("Cmd: %p RDMA_READ data_length: %u write_data_done: %u\n",
- isert_cmd, se_cmd->data_length, cmd->write_data_done);
- isert_cmd->iser_ib_op = ISER_IB_RDMA_READ;
- rc = device->reg_rdma_mem(isert_cmd, conn);
- if (rc) {
- isert_err("Cmd: %p failed to prepare RDMA res\n", isert_cmd);
- return rc;
- }
+ isert_cmd, cmd->se_cmd.data_length, cmd->write_data_done);
- rc = ib_post_send(isert_conn->qp, &isert_cmd->rdma_wr->wr, &wr_failed);
- if (rc)
- isert_warn("ib_post_send() failed for IB_WR_RDMA_READ\n");
+ isert_cmd->tx_desc.tx_cqe.done = isert_rdma_read_done;
+ isert_rdma_rw_ctx_post(isert_cmd, conn->context,
+ &isert_cmd->tx_desc.tx_cqe, NULL);
isert_dbg("Cmd: %p posted RDMA_READ memory for ISER Data WRITE\n",
isert_cmd);
-
return 0;
}
projects / cascardo / linux.git / blobdiff