diff options
| author | Steve Wise <swise@opengridcomputing.com> | 2010-09-13 18:23:57 +0200 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2010-09-28 19:46:35 +0200 |
| commit | c6d7b26791a2aefdf97f2af1e93161ed05acd631 (patch) | |
| tree | 61b9b3af001fe5983aa84034d20e44eb43c039a8 /drivers/infiniband/hw/cxgb4/device.c | |
| parent | RDMA/cxgb4: Centralize the wait logic (diff) | |
| download | linux-c6d7b26791a2aefdf97f2af1e93161ed05acd631.tar.xz linux-c6d7b26791a2aefdf97f2af1e93161ed05acd631.zip | |
RDMA/cxgb4: Support on-chip SQs
T4 support on-chip SQs to reduce latency. This patch adds support for
this in iw_cxgb4:
- Manage ocqp memory like other adapter mem resources.
- Allocate user mode SQs from ocqp mem if available.
- Map ocqp mem to user process using write combining.
- Map PCIE_MA_SYNC reg to user process.
Bump uverbs ABI.
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/hw/cxgb4/device.c')
| -rw-r--r-- | drivers/infiniband/hw/cxgb4/device.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/cxgb4/device.c b/drivers/infiniband/hw/cxgb4/device.c index 2851bf831fb2..986cfd76502c 100644 --- a/drivers/infiniband/hw/cxgb4/device.c +++ b/drivers/infiniband/hw/cxgb4/device.c @@ -364,7 +364,14 @@ static int c4iw_rdev_open(struct c4iw_rdev *rdev) printk(KERN_ERR MOD "error %d initializing rqt pool\n", err); goto err3; } + err = c4iw_ocqp_pool_create(rdev); + if (err) { + printk(KERN_ERR MOD "error %d initializing ocqp pool\n", err); + goto err4; + } return 0; +err4: + c4iw_rqtpool_destroy(rdev); err3: c4iw_pblpool_destroy(rdev); err2: @@ -391,6 +398,7 @@ static void c4iw_remove(struct c4iw_dev *dev) idr_destroy(&dev->cqidr); idr_destroy(&dev->qpidr); idr_destroy(&dev->mmidr); + iounmap(dev->rdev.oc_mw_kva); ib_dealloc_device(&dev->ibdev); } @@ -406,6 +414,17 @@ static struct c4iw_dev *c4iw_alloc(const struct cxgb4_lld_info *infop) } devp->rdev.lldi = *infop; + devp->rdev.oc_mw_pa = pci_resource_start(devp->rdev.lldi.pdev, 2) + + (pci_resource_len(devp->rdev.lldi.pdev, 2) - + roundup_pow_of_two(devp->rdev.lldi.vr->ocq.size)); + devp->rdev.oc_mw_kva = ioremap_wc(devp->rdev.oc_mw_pa, + devp->rdev.lldi.vr->ocq.size); + + printk(KERN_INFO MOD "ocq memory: " + "hw_start 0x%x size %u mw_pa 0x%lx mw_kva %p\n", + devp->rdev.lldi.vr->ocq.start, devp->rdev.lldi.vr->ocq.size, + devp->rdev.oc_mw_pa, devp->rdev.oc_mw_kva); + mutex_lock(&dev_mutex); ret = c4iw_rdev_open(&devp->rdev); |