iser-target: Centralize completion elements to a context
A pre-step before going to a single CQ.
Also this makes the code a little more simple to
read.
Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
diff --git a/drivers/infiniband/ulp/isert/ib_isert.c b/drivers/infiniband/ulp/isert/ib_isert.c
index c4b9c6d..d4a2083 100644
--- a/drivers/infiniband/ulp/isert/ib_isert.c
+++ b/drivers/infiniband/ulp/isert/ib_isert.c
@@ -107,22 +107,25 @@
{
struct isert_device *device = isert_conn->conn_device;
struct ib_qp_init_attr attr;
- int ret, index, min_index = 0;
+ struct isert_comp *comp;
+ int ret, i, min = 0;
mutex_lock(&device_list_mutex);
- for (index = 0; index < device->cqs_used; index++)
- if (device->cq_active_qps[index] <
- device->cq_active_qps[min_index])
- min_index = index;
- device->cq_active_qps[min_index]++;
- pr_debug("isert_conn_setup_qp: Using min_index: %d\n", min_index);
+ for (i = 0; i < device->comps_used; i++)
+ if (device->comps[i].active_qps <
+ device->comps[min].active_qps)
+ min = i;
+ comp = &device->comps[min];
+ comp->active_qps++;
+ pr_info("conn %p, using comp %p min_index: %d\n",
+ isert_conn, comp, min);
mutex_unlock(&device_list_mutex);
memset(&attr, 0, sizeof(struct ib_qp_init_attr));
attr.event_handler = isert_qp_event_callback;
attr.qp_context = isert_conn;
- attr.send_cq = device->dev_tx_cq[min_index];
- attr.recv_cq = device->dev_rx_cq[min_index];
+ attr.send_cq = comp->tx_cq;
+ attr.recv_cq = comp->rx_cq;
attr.cap.max_send_wr = ISERT_QP_MAX_REQ_DTOS;
attr.cap.max_recv_wr = ISERT_QP_MAX_RECV_DTOS;
/*
@@ -157,7 +160,7 @@
return 0;
err:
mutex_lock(&device_list_mutex);
- device->cq_active_qps[min_index]--;
+ comp->active_qps--;
mutex_unlock(&device_list_mutex);
return ret;
@@ -243,9 +246,8 @@
isert_create_device_ib_res(struct isert_device *device)
{
struct ib_device *ib_dev = device->ib_device;
- struct isert_cq_desc *cq_desc;
struct ib_device_attr *dev_attr;
- int ret = 0, i, j;
+ int ret = 0, i;
int max_rx_cqe, max_tx_cqe;
dev_attr = &device->dev_attr;
@@ -272,55 +274,54 @@
device->pi_capable = dev_attr->device_cap_flags &
IB_DEVICE_SIGNATURE_HANDOVER ? true : false;
- device->cqs_used = min_t(int, num_online_cpus(),
- device->ib_device->num_comp_vectors);
- device->cqs_used = min(ISERT_MAX_CQ, device->cqs_used);
- pr_debug("Using %d CQs, device %s supports %d vectors support "
- "Fast registration %d pi_capable %d\n",
- device->cqs_used, device->ib_device->name,
- device->ib_device->num_comp_vectors, device->use_fastreg,
- device->pi_capable);
- device->cq_desc = kzalloc(sizeof(struct isert_cq_desc) *
- device->cqs_used, GFP_KERNEL);
- if (!device->cq_desc) {
- pr_err("Unable to allocate device->cq_desc\n");
+ device->comps_used = min(ISERT_MAX_CQ, min_t(int, num_online_cpus(),
+ device->ib_device->num_comp_vectors));
+ pr_info("Using %d CQs, %s supports %d vectors support "
+ "Fast registration %d pi_capable %d\n",
+ device->comps_used, device->ib_device->name,
+ device->ib_device->num_comp_vectors, device->use_fastreg,
+ device->pi_capable);
+
+ device->comps = kcalloc(device->comps_used, sizeof(struct isert_comp),
+ GFP_KERNEL);
+ if (!device->comps) {
+ pr_err("Unable to allocate completion contexts\n");
return -ENOMEM;
}
- cq_desc = device->cq_desc;
- for (i = 0; i < device->cqs_used; i++) {
- cq_desc[i].device = device;
- cq_desc[i].cq_index = i;
+ for (i = 0; i < device->comps_used; i++) {
+ struct isert_comp *comp = &device->comps[i];
- INIT_WORK(&cq_desc[i].cq_rx_work, isert_cq_rx_work);
- device->dev_rx_cq[i] = ib_create_cq(device->ib_device,
- isert_cq_rx_callback,
- isert_cq_event_callback,
- (void *)&cq_desc[i],
- max_rx_cqe, i);
- if (IS_ERR(device->dev_rx_cq[i])) {
- ret = PTR_ERR(device->dev_rx_cq[i]);
- device->dev_rx_cq[i] = NULL;
+ comp->device = device;
+ INIT_WORK(&comp->rx_work, isert_cq_rx_work);
+ comp->rx_cq = ib_create_cq(device->ib_device,
+ isert_cq_rx_callback,
+ isert_cq_event_callback,
+ (void *)comp,
+ max_rx_cqe, i);
+ if (IS_ERR(comp->rx_cq)) {
+ ret = PTR_ERR(comp->rx_cq);
+ comp->rx_cq = NULL;
goto out_cq;
}
- INIT_WORK(&cq_desc[i].cq_tx_work, isert_cq_tx_work);
- device->dev_tx_cq[i] = ib_create_cq(device->ib_device,
- isert_cq_tx_callback,
- isert_cq_event_callback,
- (void *)&cq_desc[i],
- max_tx_cqe, i);
- if (IS_ERR(device->dev_tx_cq[i])) {
- ret = PTR_ERR(device->dev_tx_cq[i]);
- device->dev_tx_cq[i] = NULL;
+ INIT_WORK(&comp->tx_work, isert_cq_tx_work);
+ comp->tx_cq = ib_create_cq(device->ib_device,
+ isert_cq_tx_callback,
+ isert_cq_event_callback,
+ (void *)comp,
+ max_tx_cqe, i);
+ if (IS_ERR(comp->tx_cq)) {
+ ret = PTR_ERR(comp->tx_cq);
+ comp->tx_cq = NULL;
goto out_cq;
}
- ret = ib_req_notify_cq(device->dev_rx_cq[i], IB_CQ_NEXT_COMP);
+ ret = ib_req_notify_cq(comp->rx_cq, IB_CQ_NEXT_COMP);
if (ret)
goto out_cq;
- ret = ib_req_notify_cq(device->dev_tx_cq[i], IB_CQ_NEXT_COMP);
+ ret = ib_req_notify_cq(comp->tx_cq, IB_CQ_NEXT_COMP);
if (ret)
goto out_cq;
}
@@ -328,19 +329,19 @@
return 0;
out_cq:
- for (j = 0; j < i; j++) {
- cq_desc = &device->cq_desc[j];
+ for (i = 0; i < device->comps_used; i++) {
+ struct isert_comp *comp = &device->comps[i];
- if (device->dev_rx_cq[j]) {
- cancel_work_sync(&cq_desc->cq_rx_work);
- ib_destroy_cq(device->dev_rx_cq[j]);
+ if (comp->rx_cq) {
+ cancel_work_sync(&comp->rx_work);
+ ib_destroy_cq(comp->rx_cq);
}
- if (device->dev_tx_cq[j]) {
- cancel_work_sync(&cq_desc->cq_tx_work);
- ib_destroy_cq(device->dev_tx_cq[j]);
+ if (comp->tx_cq) {
+ cancel_work_sync(&comp->tx_work);
+ ib_destroy_cq(comp->tx_cq);
}
}
- kfree(device->cq_desc);
+ kfree(device->comps);
return ret;
}
@@ -348,21 +349,21 @@
static void
isert_free_device_ib_res(struct isert_device *device)
{
- struct isert_cq_desc *cq_desc;
int i;
- for (i = 0; i < device->cqs_used; i++) {
- cq_desc = &device->cq_desc[i];
+ pr_info("device %p\n", device);
- cancel_work_sync(&cq_desc->cq_rx_work);
- cancel_work_sync(&cq_desc->cq_tx_work);
- ib_destroy_cq(device->dev_rx_cq[i]);
- ib_destroy_cq(device->dev_tx_cq[i]);
- device->dev_rx_cq[i] = NULL;
- device->dev_tx_cq[i] = NULL;
+ for (i = 0; i < device->comps_used; i++) {
+ struct isert_comp *comp = &device->comps[i];
+
+ cancel_work_sync(&comp->rx_work);
+ cancel_work_sync(&comp->tx_work);
+ ib_destroy_cq(comp->rx_cq);
+ ib_destroy_cq(comp->tx_cq);
+ comp->rx_cq = NULL;
+ comp->tx_cq = NULL;
}
-
- kfree(device->cq_desc);
+ kfree(device->comps);
}
static void
@@ -740,7 +741,6 @@
{
struct ib_device *ib_dev = isert_conn->conn_cm_id->device;
struct isert_device *device = isert_conn->conn_device;
- int cq_index;
pr_debug("Entering isert_connect_release(): >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
@@ -751,11 +751,11 @@
rdma_destroy_id(isert_conn->conn_cm_id);
if (isert_conn->conn_qp) {
- cq_index = ((struct isert_cq_desc *)
- isert_conn->conn_qp->recv_cq->cq_context)->cq_index;
- pr_debug("isert_connect_release: cq_index: %d\n", cq_index);
+ struct isert_comp *comp = isert_conn->conn_qp->recv_cq->cq_context;
+
+ pr_debug("dec completion context %p active_qps\n", comp);
mutex_lock(&device_list_mutex);
- isert_conn->conn_device->cq_active_qps[cq_index]--;
+ comp->active_qps--;
mutex_unlock(&device_list_mutex);
ib_destroy_qp(isert_conn->conn_qp);
@@ -1524,7 +1524,7 @@
static void
isert_rx_completion(struct iser_rx_desc *desc, struct isert_conn *isert_conn,
- unsigned long xfer_len)
+ u32 xfer_len)
{
struct ib_device *ib_dev = isert_conn->conn_cm_id->device;
struct iscsi_hdr *hdr;
@@ -2051,18 +2051,16 @@
static void
isert_cq_tx_work(struct work_struct *work)
{
- struct isert_cq_desc *cq_desc = container_of(work,
- struct isert_cq_desc, cq_tx_work);
- struct isert_device *device = cq_desc->device;
- int cq_index = cq_desc->cq_index;
- struct ib_cq *tx_cq = device->dev_tx_cq[cq_index];
+ struct isert_comp *comp = container_of(work, struct isert_comp,
+ tx_work);
+ struct ib_cq *cq = comp->tx_cq;
struct isert_conn *isert_conn;
struct iser_tx_desc *tx_desc;
struct ib_wc wc;
- while (ib_poll_cq(tx_cq, 1, &wc) == 1) {
- tx_desc = (struct iser_tx_desc *)(uintptr_t)wc.wr_id;
+ while (ib_poll_cq(cq, 1, &wc) == 1) {
isert_conn = wc.qp->qp_context;
+ tx_desc = (struct iser_tx_desc *)(uintptr_t)wc.wr_id;
if (wc.status == IB_WC_SUCCESS) {
isert_send_completion(tx_desc, isert_conn);
@@ -2076,36 +2074,34 @@
}
}
- ib_req_notify_cq(tx_cq, IB_CQ_NEXT_COMP);
+ ib_req_notify_cq(cq, IB_CQ_NEXT_COMP);
}
static void
isert_cq_tx_callback(struct ib_cq *cq, void *context)
{
- struct isert_cq_desc *cq_desc = (struct isert_cq_desc *)context;
+ struct isert_comp *comp = context;
- queue_work(isert_comp_wq, &cq_desc->cq_tx_work);
+ queue_work(isert_comp_wq, &comp->tx_work);
}
static void
isert_cq_rx_work(struct work_struct *work)
{
- struct isert_cq_desc *cq_desc = container_of(work,
- struct isert_cq_desc, cq_rx_work);
- struct isert_device *device = cq_desc->device;
- int cq_index = cq_desc->cq_index;
- struct ib_cq *rx_cq = device->dev_rx_cq[cq_index];
+ struct isert_comp *comp = container_of(work, struct isert_comp,
+ rx_work);
+ struct ib_cq *cq = comp->rx_cq;
struct isert_conn *isert_conn;
struct iser_rx_desc *rx_desc;
struct ib_wc wc;
- unsigned long xfer_len;
+ u32 xfer_len;
- while (ib_poll_cq(rx_cq, 1, &wc) == 1) {
- rx_desc = (struct iser_rx_desc *)(uintptr_t)wc.wr_id;
+ while (ib_poll_cq(cq, 1, &wc) == 1) {
isert_conn = wc.qp->qp_context;
+ rx_desc = (struct iser_rx_desc *)(uintptr_t)wc.wr_id;
if (wc.status == IB_WC_SUCCESS) {
- xfer_len = (unsigned long)wc.byte_len;
+ xfer_len = wc.byte_len;
isert_rx_completion(rx_desc, isert_conn, xfer_len);
} else {
pr_debug("RX wc.status != IB_WC_SUCCESS >>>>>>>>>>>>>>\n");
@@ -2118,15 +2114,15 @@
}
}
- ib_req_notify_cq(rx_cq, IB_CQ_NEXT_COMP);
+ ib_req_notify_cq(cq, IB_CQ_NEXT_COMP);
}
static void
isert_cq_rx_callback(struct ib_cq *cq, void *context)
{
- struct isert_cq_desc *cq_desc = (struct isert_cq_desc *)context;
+ struct isert_comp *comp = context;
- queue_work(isert_rx_wq, &cq_desc->cq_rx_work);
+ queue_work(isert_rx_wq, &comp->rx_work);
}
static int