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IB: Add CQ comp_vector support

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Add a num_comp_vectors member to struct ib_device and extend
ib_create_cq() to pass in a comp_vector parameter -- this parallels
the userspace libibverbs API.  Update all hardware drivers to set
num_comp_vectors to 1 and have all ULPs pass 0 for the comp_vector
value.  Pass the value of num_comp_vectors to userspace rather than
hard-coding a value of 1.

We want multiple CQ event vector support (via MSI-X or similar for
adapters that can generate multiple interrupts), but it's not clear
how many vectors we want, or how we want to deal with policy issues
such as how to decide which vector to use or how to set up interrupt
affinity.  This patch is useful for experimenting, since no core
changes will be necessary when updating a driver to support multiple
vectors, and we know that we want to make at least these changes
anyway.

Signed-off-by: Michael S. Tsirkin <mst@dev.mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Michael S. Tsirkin
2007-05-03 13:48:47 +03:00
committed by Roland Dreier
parent 154257f362
commit f4fd0b224d
18 changed files with 28 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/infiniband/ulp/ipoib/ipoib_cm.c
View File

@@ -793,7 +793,7 @@ static int ipoib_cm_tx_init(struct ipoib_cm_tx *p, u32 qpn,
}
p->cq = ib_create_cq(priv->ca, ipoib_cm_tx_completion, NULL, p,
ipoib_sendq_size + 1);
ipoib_sendq_size + 1, 0);
if (IS_ERR(p->cq)) {
ret = PTR_ERR(p->cq);
ipoib_warn(priv, "failed to allocate tx cq: %d\n", ret);

2
drivers/infiniband/ulp/ipoib/ipoib_verbs.c
View File

@@ -187,7 +187,7 @@ int ipoib_transport_dev_init(struct net_device *dev, struct ib_device *ca)
if (!ret)
size += ipoib_recvq_size;
priv->cq = ib_create_cq(priv->ca, ipoib_ib_completion, NULL, dev, size);
priv->cq = ib_create_cq(priv->ca, ipoib_ib_completion, NULL, dev, size, 0);
if (IS_ERR(priv->cq)) {
printk(KERN_WARNING "%s: failed to create CQ\n", ca->name);
goto out_free_mr;

2
drivers/infiniband/ulp/iser/iser_verbs.c
View File

@@ -76,7 +76,7 @@ static int iser_create_device_ib_res(struct iser_device *device)
iser_cq_callback,
iser_cq_event_callback,
(void *)device,
ISER_MAX_CQ_LEN);
ISER_MAX_CQ_LEN, 0);
if (IS_ERR(device->cq))
goto cq_err;

2
drivers/infiniband/ulp/srp/ib_srp.c
View File

@@ -197,7 +197,7 @@ static int srp_create_target_ib(struct srp_target_port *target)
return -ENOMEM;
target->cq = ib_create_cq(target->srp_host->dev->dev, srp_completion,
NULL, target, SRP_CQ_SIZE);
NULL, target, SRP_CQ_SIZE, 0);
if (IS_ERR(target->cq)) {
ret = PTR_ERR(target->cq);
goto out;