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path: root/drivers/infiniband/ulp/iser/iser_verbs.c
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Diffstat (limited to 'drivers/infiniband/ulp/iser/iser_verbs.c')
-rw-r--r--drivers/infiniband/ulp/iser/iser_verbs.c281
1 files changed, 147 insertions, 134 deletions
diff --git a/drivers/infiniband/ulp/iser/iser_verbs.c b/drivers/infiniband/ulp/iser/iser_verbs.c
index 8579f32ce38..308d17bb514 100644
--- a/drivers/infiniband/ulp/iser/iser_verbs.c
+++ b/drivers/infiniband/ulp/iser/iser_verbs.c
@@ -37,9 +37,8 @@
#include "iscsi_iser.h"
#define ISCSI_ISER_MAX_CONN 8
-#define ISER_MAX_CQ_LEN ((ISER_QP_MAX_RECV_DTOS + \
- ISER_QP_MAX_REQ_DTOS) * \
- ISCSI_ISER_MAX_CONN)
+#define ISER_MAX_RX_CQ_LEN (ISER_QP_MAX_RECV_DTOS * ISCSI_ISER_MAX_CONN)
+#define ISER_MAX_TX_CQ_LEN (ISER_QP_MAX_REQ_DTOS * ISCSI_ISER_MAX_CONN)
static void iser_cq_tasklet_fn(unsigned long data);
static void iser_cq_callback(struct ib_cq *cq, void *cq_context);
@@ -67,15 +66,23 @@ static int iser_create_device_ib_res(struct iser_device *device)
if (IS_ERR(device->pd))
goto pd_err;
- device->cq = ib_create_cq(device->ib_device,
+ device->rx_cq = ib_create_cq(device->ib_device,
iser_cq_callback,
iser_cq_event_callback,
(void *)device,
- ISER_MAX_CQ_LEN, 0);
- if (IS_ERR(device->cq))
- goto cq_err;
+ ISER_MAX_RX_CQ_LEN, 0);
+ if (IS_ERR(device->rx_cq))
+ goto rx_cq_err;
- if (ib_req_notify_cq(device->cq, IB_CQ_NEXT_COMP))
+ device->tx_cq = ib_create_cq(device->ib_device,
+ NULL, iser_cq_event_callback,
+ (void *)device,
+ ISER_MAX_TX_CQ_LEN, 0);
+
+ if (IS_ERR(device->tx_cq))
+ goto tx_cq_err;
+
+ if (ib_req_notify_cq(device->rx_cq, IB_CQ_NEXT_COMP))
goto cq_arm_err;
tasklet_init(&device->cq_tasklet,
@@ -93,8 +100,10 @@ static int iser_create_device_ib_res(struct iser_device *device)
dma_mr_err:
tasklet_kill(&device->cq_tasklet);
cq_arm_err:
- ib_destroy_cq(device->cq);
-cq_err:
+ ib_destroy_cq(device->tx_cq);
+tx_cq_err:
+ ib_destroy_cq(device->rx_cq);
+rx_cq_err:
ib_dealloc_pd(device->pd);
pd_err:
iser_err("failed to allocate an IB resource\n");
@@ -112,11 +121,13 @@ static void iser_free_device_ib_res(struct iser_device *device)
tasklet_kill(&device->cq_tasklet);
(void)ib_dereg_mr(device->mr);
- (void)ib_destroy_cq(device->cq);
+ (void)ib_destroy_cq(device->tx_cq);
+ (void)ib_destroy_cq(device->rx_cq);
(void)ib_dealloc_pd(device->pd);
device->mr = NULL;
- device->cq = NULL;
+ device->tx_cq = NULL;
+ device->rx_cq = NULL;
device->pd = NULL;
}
@@ -129,13 +140,23 @@ static int iser_create_ib_conn_res(struct iser_conn *ib_conn)
{
struct iser_device *device;
struct ib_qp_init_attr init_attr;
- int ret;
+ int ret = -ENOMEM;
struct ib_fmr_pool_param params;
BUG_ON(ib_conn->device == NULL);
device = ib_conn->device;
+ ib_conn->login_buf = kmalloc(ISER_RX_LOGIN_SIZE, GFP_KERNEL);
+ if (!ib_conn->login_buf) {
+ goto alloc_err;
+ ret = -ENOMEM;
+ }
+
+ ib_conn->login_dma = ib_dma_map_single(ib_conn->device->ib_device,
+ (void *)ib_conn->login_buf, ISER_RX_LOGIN_SIZE,
+ DMA_FROM_DEVICE);
+
ib_conn->page_vec = kmalloc(sizeof(struct iser_page_vec) +
(sizeof(u64) * (ISCSI_ISER_SG_TABLESIZE +1)),
GFP_KERNEL);
@@ -169,12 +190,12 @@ static int iser_create_ib_conn_res(struct iser_conn *ib_conn)
init_attr.event_handler = iser_qp_event_callback;
init_attr.qp_context = (void *)ib_conn;
- init_attr.send_cq = device->cq;
- init_attr.recv_cq = device->cq;
+ init_attr.send_cq = device->tx_cq;
+ init_attr.recv_cq = device->rx_cq;
init_attr.cap.max_send_wr = ISER_QP_MAX_REQ_DTOS;
init_attr.cap.max_recv_wr = ISER_QP_MAX_RECV_DTOS;
- init_attr.cap.max_send_sge = MAX_REGD_BUF_VECTOR_LEN;
- init_attr.cap.max_recv_sge = 2;
+ init_attr.cap.max_send_sge = 2;
+ init_attr.cap.max_recv_sge = 1;
init_attr.sq_sig_type = IB_SIGNAL_REQ_WR;
init_attr.qp_type = IB_QPT_RC;
@@ -192,6 +213,7 @@ qp_err:
(void)ib_destroy_fmr_pool(ib_conn->fmr_pool);
fmr_pool_err:
kfree(ib_conn->page_vec);
+ kfree(ib_conn->login_buf);
alloc_err:
iser_err("unable to alloc mem or create resource, err %d\n", ret);
return ret;
@@ -278,17 +300,6 @@ static void iser_device_try_release(struct iser_device *device)
mutex_unlock(&ig.device_list_mutex);
}
-int iser_conn_state_comp(struct iser_conn *ib_conn,
- enum iser_ib_conn_state comp)
-{
- int ret;
-
- spin_lock_bh(&ib_conn->lock);
- ret = (ib_conn->state == comp);
- spin_unlock_bh(&ib_conn->lock);
- return ret;
-}
-
static int iser_conn_state_comp_exch(struct iser_conn *ib_conn,
enum iser_ib_conn_state comp,
enum iser_ib_conn_state exch)
@@ -314,7 +325,7 @@ static void iser_conn_release(struct iser_conn *ib_conn)
mutex_lock(&ig.connlist_mutex);
list_del(&ib_conn->conn_list);
mutex_unlock(&ig.connlist_mutex);
-
+ iser_free_rx_descriptors(ib_conn);
iser_free_ib_conn_res(ib_conn);
ib_conn->device = NULL;
/* on EVENT_ADDR_ERROR there's no device yet for this conn */
@@ -442,7 +453,7 @@ static void iser_disconnected_handler(struct rdma_cm_id *cma_id)
ISCSI_ERR_CONN_FAILED);
/* Complete the termination process if no posts are pending */
- if ((atomic_read(&ib_conn->post_recv_buf_count) == 0) &&
+ if (ib_conn->post_recv_buf_count == 0 &&
(atomic_read(&ib_conn->post_send_buf_count) == 0)) {
ib_conn->state = ISER_CONN_DOWN;
wake_up_interruptible(&ib_conn->wait);
@@ -489,9 +500,8 @@ void iser_conn_init(struct iser_conn *ib_conn)
{
ib_conn->state = ISER_CONN_INIT;
init_waitqueue_head(&ib_conn->wait);
- atomic_set(&ib_conn->post_recv_buf_count, 0);
+ ib_conn->post_recv_buf_count = 0;
atomic_set(&ib_conn->post_send_buf_count, 0);
- atomic_set(&ib_conn->unexpected_pdu_count, 0);
atomic_set(&ib_conn->refcount, 1);
INIT_LIST_HEAD(&ib_conn->conn_list);
spin_lock_init(&ib_conn->lock);
@@ -626,136 +636,97 @@ void iser_unreg_mem(struct iser_mem_reg *reg)
reg->mem_h = NULL;
}
-/**
- * iser_dto_to_iov - builds IOV from a dto descriptor
- */
-static void iser_dto_to_iov(struct iser_dto *dto, struct ib_sge *iov, int iov_len)
+int iser_post_recvl(struct iser_conn *ib_conn)
{
- int i;
- struct ib_sge *sge;
- struct iser_regd_buf *regd_buf;
-
- if (dto->regd_vector_len > iov_len) {
- iser_err("iov size %d too small for posting dto of len %d\n",
- iov_len, dto->regd_vector_len);
- BUG();
- }
+ struct ib_recv_wr rx_wr, *rx_wr_failed;
+ struct ib_sge sge;
+ int ib_ret;
- for (i = 0; i < dto->regd_vector_len; i++) {
- sge = &iov[i];
- regd_buf = dto->regd[i];
-
- sge->addr = regd_buf->reg.va;
- sge->length = regd_buf->reg.len;
- sge->lkey = regd_buf->reg.lkey;
-
- if (dto->used_sz[i] > 0) /* Adjust size */
- sge->length = dto->used_sz[i];
-
- /* offset and length should not exceed the regd buf length */
- if (sge->length + dto->offset[i] > regd_buf->reg.len) {
- iser_err("Used len:%ld + offset:%d, exceed reg.buf.len:"
- "%ld in dto:0x%p [%d], va:0x%08lX\n",
- (unsigned long)sge->length, dto->offset[i],
- (unsigned long)regd_buf->reg.len, dto, i,
- (unsigned long)sge->addr);
- BUG();
- }
+ sge.addr = ib_conn->login_dma;
+ sge.length = ISER_RX_LOGIN_SIZE;
+ sge.lkey = ib_conn->device->mr->lkey;
- sge->addr += dto->offset[i]; /* Adjust offset */
+ rx_wr.wr_id = (unsigned long)ib_conn->login_buf;
+ rx_wr.sg_list = &sge;
+ rx_wr.num_sge = 1;
+ rx_wr.next = NULL;
+
+ ib_conn->post_recv_buf_count++;
+ ib_ret = ib_post_recv(ib_conn->qp, &rx_wr, &rx_wr_failed);
+ if (ib_ret) {
+ iser_err("ib_post_recv failed ret=%d\n", ib_ret);
+ ib_conn->post_recv_buf_count--;
}
+ return ib_ret;
}
-/**
- * iser_post_recv - Posts a receive buffer.
- *
- * returns 0 on success, -1 on failure
- */
-int iser_post_recv(struct iser_desc *rx_desc)
+int iser_post_recvm(struct iser_conn *ib_conn, int count)
{
- int ib_ret, ret_val = 0;
- struct ib_recv_wr recv_wr, *recv_wr_failed;
- struct ib_sge iov[2];
- struct iser_conn *ib_conn;
- struct iser_dto *recv_dto = &rx_desc->dto;
-
- /* Retrieve conn */
- ib_conn = recv_dto->ib_conn;
-
- iser_dto_to_iov(recv_dto, iov, 2);
+ struct ib_recv_wr *rx_wr, *rx_wr_failed;
+ int i, ib_ret;
+ unsigned int my_rx_head = ib_conn->rx_desc_head;
+ struct iser_rx_desc *rx_desc;
+
+ for (rx_wr = ib_conn->rx_wr, i = 0; i < count; i++, rx_wr++) {
+ rx_desc = &ib_conn->rx_descs[my_rx_head];
+ rx_wr->wr_id = (unsigned long)rx_desc;
+ rx_wr->sg_list = &rx_desc->rx_sg;
+ rx_wr->num_sge = 1;
+ rx_wr->next = rx_wr + 1;
+ my_rx_head = (my_rx_head + 1) & (ISER_QP_MAX_RECV_DTOS - 1);
+ }
- recv_wr.next = NULL;
- recv_wr.sg_list = iov;
- recv_wr.num_sge = recv_dto->regd_vector_len;
- recv_wr.wr_id = (unsigned long)rx_desc;
+ rx_wr--;
+ rx_wr->next = NULL; /* mark end of work requests list */
- atomic_inc(&ib_conn->post_recv_buf_count);
- ib_ret = ib_post_recv(ib_conn->qp, &recv_wr, &recv_wr_failed);
+ ib_conn->post_recv_buf_count += count;
+ ib_ret = ib_post_recv(ib_conn->qp, ib_conn->rx_wr, &rx_wr_failed);
if (ib_ret) {
iser_err("ib_post_recv failed ret=%d\n", ib_ret);
- atomic_dec(&ib_conn->post_recv_buf_count);
- ret_val = -1;
- }
-
- return ret_val;
+ ib_conn->post_recv_buf_count -= count;
+ } else
+ ib_conn->rx_desc_head = my_rx_head;
+ return ib_ret;
}
+
/**
* iser_start_send - Initiate a Send DTO operation
*
* returns 0 on success, -1 on failure
*/
-int iser_post_send(struct iser_desc *tx_desc)
+int iser_post_send(struct iser_conn *ib_conn, struct iser_tx_desc *tx_desc)
{
- int ib_ret, ret_val = 0;
+ int ib_ret;
struct ib_send_wr send_wr, *send_wr_failed;
- struct ib_sge iov[MAX_REGD_BUF_VECTOR_LEN];
- struct iser_conn *ib_conn;
- struct iser_dto *dto = &tx_desc->dto;
- ib_conn = dto->ib_conn;
-
- iser_dto_to_iov(dto, iov, MAX_REGD_BUF_VECTOR_LEN);
+ 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 = (unsigned long)tx_desc;
- send_wr.sg_list = iov;
- send_wr.num_sge = dto->regd_vector_len;
+ 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 = dto->notify_enable ? IB_SEND_SIGNALED : 0;
+ send_wr.send_flags = IB_SEND_SIGNALED;
atomic_inc(&ib_conn->post_send_buf_count);
ib_ret = ib_post_send(ib_conn->qp, &send_wr, &send_wr_failed);
if (ib_ret) {
- iser_err("Failed to start SEND DTO, dto: 0x%p, IOV len: %d\n",
- dto, dto->regd_vector_len);
iser_err("ib_post_send failed, ret:%d\n", ib_ret);
atomic_dec(&ib_conn->post_send_buf_count);
- ret_val = -1;
}
-
- return ret_val;
+ return ib_ret;
}
-static void iser_handle_comp_error(struct iser_desc *desc)
+static void iser_handle_comp_error(struct iser_tx_desc *desc,
+ struct iser_conn *ib_conn)
{
- struct iser_dto *dto = &desc->dto;
- struct iser_conn *ib_conn = dto->ib_conn;
-
- iser_dto_buffs_release(dto);
-
- if (desc->type == ISCSI_RX) {
- kfree(desc->data);
+ if (desc && desc->type == ISCSI_TX_DATAOUT)
kmem_cache_free(ig.desc_cache, desc);
- atomic_dec(&ib_conn->post_recv_buf_count);
- } else { /* type is TX control/command/dataout */
- if (desc->type == ISCSI_TX_DATAOUT)
- kmem_cache_free(ig.desc_cache, desc);
- atomic_dec(&ib_conn->post_send_buf_count);
- }
- if (atomic_read(&ib_conn->post_recv_buf_count) == 0 &&
+ if (ib_conn->post_recv_buf_count == 0 &&
atomic_read(&ib_conn->post_send_buf_count) == 0) {
/* getting here when the state is UP means that the conn is *
* being terminated asynchronously from the iSCSI layer's *
@@ -774,32 +745,74 @@ static void iser_handle_comp_error(struct iser_desc *desc)
}
}
+static int iser_drain_tx_cq(struct iser_device *device)
+{
+ struct ib_cq *cq = device->tx_cq;
+ struct ib_wc wc;
+ struct iser_tx_desc *tx_desc;
+ struct iser_conn *ib_conn;
+ int completed_tx = 0;
+
+ while (ib_poll_cq(cq, 1, &wc) == 1) {
+ tx_desc = (struct iser_tx_desc *) (unsigned long) wc.wr_id;
+ ib_conn = wc.qp->qp_context;
+ if (wc.status == IB_WC_SUCCESS) {
+ if (wc.opcode == IB_WC_SEND)
+ iser_snd_completion(tx_desc, ib_conn);
+ else
+ iser_err("expected opcode %d got %d\n",
+ IB_WC_SEND, wc.opcode);
+ } else {
+ iser_err("tx id %llx status %d vend_err %x\n",
+ wc.wr_id, wc.status, wc.vendor_err);
+ atomic_dec(&ib_conn->post_send_buf_count);
+ iser_handle_comp_error(tx_desc, ib_conn);
+ }
+ completed_tx++;
+ }
+ return completed_tx;
+}
+
+
static void iser_cq_tasklet_fn(unsigned long data)
{
struct iser_device *device = (struct iser_device *)data;
- struct ib_cq *cq = device->cq;
+ struct ib_cq *cq = device->rx_cq;
struct ib_wc wc;
- struct iser_desc *desc;
+ struct iser_rx_desc *desc;
unsigned long xfer_len;
+ struct iser_conn *ib_conn;
+ int completed_tx, completed_rx;
+ completed_tx = completed_rx = 0;
while (ib_poll_cq(cq, 1, &wc) == 1) {
- desc = (struct iser_desc *) (unsigned long) wc.wr_id;
+ desc = (struct iser_rx_desc *) (unsigned long) wc.wr_id;
BUG_ON(desc == NULL);
-
+ ib_conn = wc.qp->qp_context;
if (wc.status == IB_WC_SUCCESS) {
- if (desc->type == ISCSI_RX) {
+ if (wc.opcode == IB_WC_RECV) {
xfer_len = (unsigned long)wc.byte_len;
- iser_rcv_completion(desc, xfer_len);
- } else /* type == ISCSI_TX_CONTROL/SCSI_CMD/DOUT */
- iser_snd_completion(desc);
+ iser_rcv_completion(desc, xfer_len, ib_conn);
+ } else
+ iser_err("expected opcode %d got %d\n",
+ IB_WC_RECV, wc.opcode);
} else {
- iser_err("comp w. error op %d status %d\n",desc->type,wc.status);
- iser_handle_comp_error(desc);
+ if (wc.status != IB_WC_WR_FLUSH_ERR)
+ iser_err("rx id %llx status %d vend_err %x\n",
+ wc.wr_id, wc.status, wc.vendor_err);
+ ib_conn->post_recv_buf_count--;
+ iser_handle_comp_error(NULL, ib_conn);
}
+ completed_rx++;
+ if (!(completed_rx & 63))
+ completed_tx += iser_drain_tx_cq(device);
}
/* #warning "it is assumed here that arming CQ only once its empty" *
* " would not cause interrupts to be missed" */
ib_req_notify_cq(cq, IB_CQ_NEXT_COMP);
+
+ completed_tx += iser_drain_tx_cq(device);
+ iser_dbg("got %d rx %d tx completions\n", completed_rx, completed_tx);
}
static void iser_cq_callback(struct ib_cq *cq, void *cq_context)