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RDMA/cxgb4: Support on-chip SQs

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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>
This commit is contained in:
Steve Wise
2010-09-13 11:23:57 -05:00
committed by Roland Dreier
parent aadc4df308
commit c6d7b26791
7 changed files with 226 additions and 29 deletions
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19
drivers/infiniband/hw/cxgb4/device.c
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@@ -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);