return ret;
}
- /* Assign function handles - based on FMR support */
- if (device->ib_device->alloc_fmr && device->ib_device->dealloc_fmr &&
- device->ib_device->map_phys_fmr && device->ib_device->unmap_fmr) {
- iser_info("FMR supported, using FMR for registration\n");
- device->iser_alloc_rdma_reg_res = iser_create_fmr_pool;
- device->iser_free_rdma_reg_res = iser_free_fmr_pool;
- device->iser_reg_rdma_mem = iser_reg_rdma_mem_fmr;
- device->iser_unreg_rdma_mem = iser_unreg_mem_fmr;
- } else
- if (dev_attr->device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS) {
- iser_info("FastReg supported, using FastReg for registration\n");
- device->iser_alloc_rdma_reg_res = iser_create_fastreg_pool;
- device->iser_free_rdma_reg_res = iser_free_fastreg_pool;
- device->iser_reg_rdma_mem = iser_reg_rdma_mem_fastreg;
- device->iser_unreg_rdma_mem = iser_unreg_mem_fastreg;
- } else {
- iser_err("IB device does not support FMRs nor FastRegs, can't register memory\n");
- return -1;
- }
+ ret = iser_assign_reg_ops(device);
+ if (ret)
+ return ret;
device->comps_used = min_t(int, num_online_cpus(),
device->ib_device->num_comp_vectors);
}
/**
- * iser_create_fmr_pool - Creates FMR pool and page_vector
+ * iser_alloc_fmr_pool - Creates FMR pool and page_vector
*
* returns 0 on success, or errno code on failure
*/
-int iser_create_fmr_pool(struct ib_conn *ib_conn, unsigned cmds_max)
+int iser_alloc_fmr_pool(struct ib_conn *ib_conn,
+ unsigned cmds_max,
+ unsigned int size)
{
struct iser_device *device = ib_conn->device;
+ struct iser_fr_pool *fr_pool = &ib_conn->fr_pool;
+ struct iser_page_vec *page_vec;
+ struct iser_fr_desc *desc;
+ struct ib_fmr_pool *fmr_pool;
struct ib_fmr_pool_param params;
- int ret = -ENOMEM;
+ int ret;
- ib_conn->fmr.page_vec = kmalloc(sizeof(*ib_conn->fmr.page_vec) +
- (sizeof(u64)*(ISCSI_ISER_SG_TABLESIZE + 1)),
- GFP_KERNEL);
- if (!ib_conn->fmr.page_vec)
- return ret;
+ INIT_LIST_HEAD(&fr_pool->list);
+ spin_lock_init(&fr_pool->lock);
+
+ desc = kzalloc(sizeof(*desc), GFP_KERNEL);
+ if (!desc)
+ return -ENOMEM;
+
+ page_vec = kmalloc(sizeof(*page_vec) + (sizeof(u64) * size),
+ GFP_KERNEL);
+ if (!page_vec) {
+ ret = -ENOMEM;
+ goto err_frpl;
+ }
- ib_conn->fmr.page_vec->pages = (u64 *)(ib_conn->fmr.page_vec + 1);
+ page_vec->pages = (u64 *)(page_vec + 1);
params.page_shift = SHIFT_4K;
- /* when the first/last SG element are not start/end *
- * page aligned, the map whould be of N+1 pages */
- params.max_pages_per_fmr = ISCSI_ISER_SG_TABLESIZE + 1;
+ params.max_pages_per_fmr = size;
/* make the pool size twice the max number of SCSI commands *
* the ML is expected to queue, watermark for unmap at 50% */
params.pool_size = cmds_max * 2;
IB_ACCESS_REMOTE_WRITE |
IB_ACCESS_REMOTE_READ);
- ib_conn->fmr.pool = ib_create_fmr_pool(device->pd, ¶ms);
- if (!IS_ERR(ib_conn->fmr.pool))
- return 0;
-
- /* no FMR => no need for page_vec */
- kfree(ib_conn->fmr.page_vec);
- ib_conn->fmr.page_vec = NULL;
-
- ret = PTR_ERR(ib_conn->fmr.pool);
- ib_conn->fmr.pool = NULL;
- if (ret != -ENOSYS) {
+ fmr_pool = ib_create_fmr_pool(device->pd, ¶ms);
+ if (IS_ERR(fmr_pool)) {
+ ret = PTR_ERR(fmr_pool);
iser_err("FMR allocation failed, err %d\n", ret);
- return ret;
- } else {
- iser_warn("FMRs are not supported, using unaligned mode\n");
- return 0;
+ goto err_fmr;
}
+
+ desc->rsc.page_vec = page_vec;
+ desc->rsc.fmr_pool = fmr_pool;
+ list_add(&desc->list, &fr_pool->list);
+
+ return 0;
+
+err_fmr:
+ kfree(page_vec);
+err_frpl:
+ kfree(desc);
+
+ return ret;
}
/**
*/
void iser_free_fmr_pool(struct ib_conn *ib_conn)
{
+ struct iser_fr_pool *fr_pool = &ib_conn->fr_pool;
+ struct iser_fr_desc *desc;
+
+ desc = list_first_entry(&fr_pool->list,
+ struct iser_fr_desc, list);
+ list_del(&desc->list);
+
iser_info("freeing conn %p fmr pool %p\n",
- ib_conn, ib_conn->fmr.pool);
+ ib_conn, desc->rsc.fmr_pool);
+
+ ib_destroy_fmr_pool(desc->rsc.fmr_pool);
+ kfree(desc->rsc.page_vec);
+ kfree(desc);
+}
+
+static int
+iser_alloc_reg_res(struct ib_device *ib_device,
+ struct ib_pd *pd,
+ struct iser_reg_resources *res,
+ unsigned int size)
+{
+ int ret;
+
+ res->frpl = ib_alloc_fast_reg_page_list(ib_device, size);
+ if (IS_ERR(res->frpl)) {
+ ret = PTR_ERR(res->frpl);
+ iser_err("Failed to allocate ib_fast_reg_page_list err=%d\n",
+ ret);
+ return PTR_ERR(res->frpl);
+ }
- if (ib_conn->fmr.pool != NULL)
- ib_destroy_fmr_pool(ib_conn->fmr.pool);
+ res->mr = ib_alloc_mr(pd, IB_MR_TYPE_MEM_REG, size);
+ if (IS_ERR(res->mr)) {
+ ret = PTR_ERR(res->mr);
+ iser_err("Failed to allocate ib_fast_reg_mr err=%d\n", ret);
+ goto fast_reg_mr_failure;
+ }
+ res->mr_valid = 1;
- ib_conn->fmr.pool = NULL;
+ return 0;
- kfree(ib_conn->fmr.page_vec);
- ib_conn->fmr.page_vec = NULL;
+fast_reg_mr_failure:
+ ib_free_fast_reg_page_list(res->frpl);
+
+ return ret;
+}
+
+static void
+iser_free_reg_res(struct iser_reg_resources *rsc)
+{
+ ib_dereg_mr(rsc->mr);
+ ib_free_fast_reg_page_list(rsc->frpl);
}
static int
-iser_alloc_pi_ctx(struct ib_device *ib_device, struct ib_pd *pd,
- struct fast_reg_descriptor *desc)
+iser_alloc_pi_ctx(struct ib_device *ib_device,
+ struct ib_pd *pd,
+ struct iser_fr_desc *desc,
+ unsigned int size)
{
struct iser_pi_context *pi_ctx = NULL;
- struct ib_mr_init_attr mr_init_attr = {.max_reg_descriptors = 2,
- .flags = IB_MR_SIGNATURE_EN};
- int ret = 0;
+ int ret;
desc->pi_ctx = kzalloc(sizeof(*desc->pi_ctx), GFP_KERNEL);
if (!desc->pi_ctx)
pi_ctx = desc->pi_ctx;
- pi_ctx->prot_frpl = ib_alloc_fast_reg_page_list(ib_device,
- ISCSI_ISER_SG_TABLESIZE);
- if (IS_ERR(pi_ctx->prot_frpl)) {
- ret = PTR_ERR(pi_ctx->prot_frpl);
- goto prot_frpl_failure;
- }
-
- pi_ctx->prot_mr = ib_alloc_fast_reg_mr(pd,
- ISCSI_ISER_SG_TABLESIZE + 1);
- if (IS_ERR(pi_ctx->prot_mr)) {
- ret = PTR_ERR(pi_ctx->prot_mr);
- goto prot_mr_failure;
+ ret = iser_alloc_reg_res(ib_device, pd, &pi_ctx->rsc, size);
+ if (ret) {
+ iser_err("failed to allocate reg_resources\n");
+ goto alloc_reg_res_err;
}
- desc->reg_indicators |= ISER_PROT_KEY_VALID;
- pi_ctx->sig_mr = ib_create_mr(pd, &mr_init_attr);
+ pi_ctx->sig_mr = ib_alloc_mr(pd, IB_MR_TYPE_SIGNATURE, 2);
if (IS_ERR(pi_ctx->sig_mr)) {
ret = PTR_ERR(pi_ctx->sig_mr);
goto sig_mr_failure;
}
- desc->reg_indicators |= ISER_SIG_KEY_VALID;
- desc->reg_indicators &= ~ISER_FASTREG_PROTECTED;
+ pi_ctx->sig_mr_valid = 1;
+ desc->pi_ctx->sig_protected = 0;
return 0;
sig_mr_failure:
- ib_dereg_mr(desc->pi_ctx->prot_mr);
-prot_mr_failure:
- ib_free_fast_reg_page_list(desc->pi_ctx->prot_frpl);
-prot_frpl_failure:
+ iser_free_reg_res(&pi_ctx->rsc);
+alloc_reg_res_err:
kfree(desc->pi_ctx);
return ret;
static void
iser_free_pi_ctx(struct iser_pi_context *pi_ctx)
{
- ib_free_fast_reg_page_list(pi_ctx->prot_frpl);
- ib_dereg_mr(pi_ctx->prot_mr);
- ib_destroy_mr(pi_ctx->sig_mr);
+ iser_free_reg_res(&pi_ctx->rsc);
+ ib_dereg_mr(pi_ctx->sig_mr);
kfree(pi_ctx);
}
-static int
-iser_create_fastreg_desc(struct ib_device *ib_device, struct ib_pd *pd,
- bool pi_enable, struct fast_reg_descriptor *desc)
+static struct iser_fr_desc *
+iser_create_fastreg_desc(struct ib_device *ib_device,
+ struct ib_pd *pd,
+ bool pi_enable,
+ unsigned int size)
{
+ struct iser_fr_desc *desc;
int ret;
- desc->data_frpl = ib_alloc_fast_reg_page_list(ib_device,
- ISCSI_ISER_SG_TABLESIZE + 1);
- if (IS_ERR(desc->data_frpl)) {
- ret = PTR_ERR(desc->data_frpl);
- iser_err("Failed to allocate ib_fast_reg_page_list err=%d\n",
- ret);
- return PTR_ERR(desc->data_frpl);
- }
+ desc = kzalloc(sizeof(*desc), GFP_KERNEL);
+ if (!desc)
+ return ERR_PTR(-ENOMEM);
- desc->data_mr = ib_alloc_fast_reg_mr(pd, ISCSI_ISER_SG_TABLESIZE + 1);
- if (IS_ERR(desc->data_mr)) {
- ret = PTR_ERR(desc->data_mr);
- iser_err("Failed to allocate ib_fast_reg_mr err=%d\n", ret);
- goto fast_reg_mr_failure;
- }
- desc->reg_indicators |= ISER_DATA_KEY_VALID;
+ ret = iser_alloc_reg_res(ib_device, pd, &desc->rsc, size);
+ if (ret)
+ goto reg_res_alloc_failure;
if (pi_enable) {
- ret = iser_alloc_pi_ctx(ib_device, pd, desc);
+ ret = iser_alloc_pi_ctx(ib_device, pd, desc, size);
if (ret)
goto pi_ctx_alloc_failure;
}
- return 0;
+ return desc;
+
pi_ctx_alloc_failure:
- ib_dereg_mr(desc->data_mr);
-fast_reg_mr_failure:
- ib_free_fast_reg_page_list(desc->data_frpl);
+ iser_free_reg_res(&desc->rsc);
+reg_res_alloc_failure:
+ kfree(desc);
- return ret;
+ return ERR_PTR(ret);
}
/**
- * iser_create_fastreg_pool - Creates pool of fast_reg descriptors
+ * iser_alloc_fastreg_pool - Creates pool of fast_reg descriptors
* for fast registration work requests.
* returns 0 on success, or errno code on failure
*/
-int iser_create_fastreg_pool(struct ib_conn *ib_conn, unsigned cmds_max)
+int iser_alloc_fastreg_pool(struct ib_conn *ib_conn,
+ unsigned cmds_max,
+ unsigned int size)
{
struct iser_device *device = ib_conn->device;
- struct fast_reg_descriptor *desc;
+ struct iser_fr_pool *fr_pool = &ib_conn->fr_pool;
+ struct iser_fr_desc *desc;
int i, ret;
- INIT_LIST_HEAD(&ib_conn->fastreg.pool);
- ib_conn->fastreg.pool_size = 0;
+ INIT_LIST_HEAD(&fr_pool->list);
+ spin_lock_init(&fr_pool->lock);
+ fr_pool->size = 0;
for (i = 0; i < cmds_max; i++) {
- desc = kzalloc(sizeof(*desc), GFP_KERNEL);
- if (!desc) {
- iser_err("Failed to allocate a new fast_reg descriptor\n");
- ret = -ENOMEM;
- goto err;
- }
-
- ret = iser_create_fastreg_desc(device->ib_device, device->pd,
- ib_conn->pi_support, desc);
- if (ret) {
- iser_err("Failed to create fastreg descriptor err=%d\n",
- ret);
- kfree(desc);
+ desc = iser_create_fastreg_desc(device->ib_device, device->pd,
+ ib_conn->pi_support, size);
+ if (IS_ERR(desc)) {
+ ret = PTR_ERR(desc);
goto err;
}
- list_add_tail(&desc->list, &ib_conn->fastreg.pool);
- ib_conn->fastreg.pool_size++;
+ list_add_tail(&desc->list, &fr_pool->list);
+ fr_pool->size++;
}
return 0;
*/
void iser_free_fastreg_pool(struct ib_conn *ib_conn)
{
- struct fast_reg_descriptor *desc, *tmp;
+ struct iser_fr_pool *fr_pool = &ib_conn->fr_pool;
+ struct iser_fr_desc *desc, *tmp;
int i = 0;
- if (list_empty(&ib_conn->fastreg.pool))
+ if (list_empty(&fr_pool->list))
return;
iser_info("freeing conn %p fr pool\n", ib_conn);
- list_for_each_entry_safe(desc, tmp, &ib_conn->fastreg.pool, list) {
+ list_for_each_entry_safe(desc, tmp, &fr_pool->list, list) {
list_del(&desc->list);
- ib_free_fast_reg_page_list(desc->data_frpl);
- ib_dereg_mr(desc->data_mr);
+ iser_free_reg_res(&desc->rsc);
if (desc->pi_ctx)
iser_free_pi_ctx(desc->pi_ctx);
kfree(desc);
++i;
}
- if (i < ib_conn->fastreg.pool_size)
+ if (i < fr_pool->size)
iser_warn("pool still has %d regions registered\n",
- ib_conn->fastreg.pool_size - i);
+ fr_pool->size - i);
}
/**
iser_conn->state = ISER_CONN_TERMINATING;
}
+static void
+iser_calc_scsi_params(struct iser_conn *iser_conn,
+ unsigned int max_sectors)
+{
+ struct iser_device *device = iser_conn->ib_conn.device;
+ unsigned short sg_tablesize, sup_sg_tablesize;
+
+ sg_tablesize = DIV_ROUND_UP(max_sectors * 512, SIZE_4K);
+ sup_sg_tablesize = min_t(unsigned, ISCSI_ISER_MAX_SG_TABLESIZE,
+ device->dev_attr.max_fast_reg_page_list_len);
+
+ if (sg_tablesize > sup_sg_tablesize) {
+ sg_tablesize = sup_sg_tablesize;
+ iser_conn->scsi_max_sectors = sg_tablesize * SIZE_4K / 512;
+ } else {
+ iser_conn->scsi_max_sectors = max_sectors;
+ }
+
+ iser_conn->scsi_sg_tablesize = sg_tablesize;
+
+ iser_dbg("iser_conn %p, sg_tablesize %u, max_sectors %u\n",
+ iser_conn, iser_conn->scsi_sg_tablesize,
+ iser_conn->scsi_max_sectors);
+}
+
/**
* Called with state mutex held
**/
}
}
+ iser_calc_scsi_params(iser_conn, iser_max_sectors);
+
ret = rdma_resolve_route(cma_id, 1000);
if (ret) {
iser_err("resolve route failed: %d\n", ret);
init_completion(&iser_conn->ib_completion);
init_completion(&iser_conn->up_completion);
INIT_LIST_HEAD(&iser_conn->conn_list);
- spin_lock_init(&iser_conn->ib_conn.lock);
mutex_init(&iser_conn->state_mutex);
}
sge.addr = iser_conn->login_resp_dma;
sge.length = ISER_RX_LOGIN_SIZE;
- sge.lkey = ib_conn->device->mr->lkey;
+ sge.lkey = ib_conn->device->pd->local_dma_lkey;
rx_wr.wr_id = (uintptr_t)iser_conn->login_resp_buf;
rx_wr.sg_list = &sge;
int iser_post_send(struct ib_conn *ib_conn, struct iser_tx_desc *tx_desc,
bool signal)
{
- int ib_ret;
- struct ib_send_wr send_wr, *send_wr_failed;
+ struct ib_send_wr *bad_wr, *wr = iser_tx_next_wr(tx_desc);
+ int ib_ret;
ib_dma_sync_single_for_device(ib_conn->device->ib_device,
tx_desc->dma_addr, ISER_HEADERS_LEN,
DMA_TO_DEVICE);
- send_wr.next = NULL;
- send_wr.wr_id = (uintptr_t)tx_desc;
- send_wr.sg_list = tx_desc->tx_sg;
- send_wr.num_sge = tx_desc->num_sge;
- send_wr.opcode = IB_WR_SEND;
- send_wr.send_flags = signal ? IB_SEND_SIGNALED : 0;
+ wr->next = NULL;
+ wr->wr_id = (uintptr_t)tx_desc;
+ wr->sg_list = tx_desc->tx_sg;
+ wr->num_sge = tx_desc->num_sge;
+ wr->opcode = IB_WR_SEND;
+ wr->send_flags = signal ? IB_SEND_SIGNALED : 0;
- ib_ret = ib_post_send(ib_conn->qp, &send_wr, &send_wr_failed);
+ ib_ret = ib_post_send(ib_conn->qp, &tx_desc->wrs[0], &bad_wr);
if (ib_ret)
- iser_err("ib_post_send failed, ret:%d\n", ib_ret);
+ iser_err("ib_post_send failed, ret:%d opcode:%d\n",
+ ib_ret, bad_wr->opcode);
return ib_ret;
}
enum iser_data_dir cmd_dir, sector_t *sector)
{
struct iser_mem_reg *reg = &iser_task->rdma_reg[cmd_dir];
- struct fast_reg_descriptor *desc = reg->mem_h;
+ struct iser_fr_desc *desc = reg->mem_h;
unsigned long sector_size = iser_task->sc->device->sector_size;
struct ib_mr_status mr_status;
int ret;
- if (desc && desc->reg_indicators & ISER_FASTREG_PROTECTED) {
- desc->reg_indicators &= ~ISER_FASTREG_PROTECTED;
+ if (desc && desc->pi_ctx->sig_protected) {
+ desc->pi_ctx->sig_protected = 0;
ret = ib_check_mr_status(desc->pi_ctx->sig_mr,
IB_MR_CHECK_SIG_STATUS, &mr_status);
if (ret) {
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