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authorHariprasad S <hariprasad@chelsio.com>2015-06-09 18:23:12 +0530
committerDoug Ledford <dledford@redhat.com>2015-06-11 12:22:32 -0400
commit74217d4c6a4fb0d80a7e2f217584ccdc692d5f57 (patch)
treef87f4635c81e69f824723c0fe9e5d064a645030b /drivers/infiniband/hw/cxgb4/device.c
parentcxgb4: Support for user mode bar2 mappings with T4 (diff)
downloadlinux-dev-74217d4c6a4fb0d80a7e2f217584ccdc692d5f57.tar.xz
linux-dev-74217d4c6a4fb0d80a7e2f217584ccdc692d5f57.zip
iw_cxgb4: support for bar2 qid densities exceeding the page size
Handle this configuration: Queues Per Page * SGE BAR2 Queue Register Area Size > Page Size Use cxgb4_bar2_sge_qregs() to obtain the proper location within the bar2 region for a given qid. Rework the DB and GTS write functions to make use of this bar2 info. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/infiniband/hw/cxgb4/device.c')
-rw-r--r--drivers/infiniband/hw/cxgb4/device.c16
1 files changed, 4 insertions, 12 deletions
diff --git a/drivers/infiniband/hw/cxgb4/device.c b/drivers/infiniband/hw/cxgb4/device.c
index 7e895d714b19..1a297391b54c 100644
--- a/drivers/infiniband/hw/cxgb4/device.c
+++ b/drivers/infiniband/hw/cxgb4/device.c
@@ -795,13 +795,7 @@ static int c4iw_rdev_open(struct c4iw_rdev *rdev)
goto err1;
}
- /*
- * qpshift is the number of bits to shift the qpid left in order
- * to get the correct address of the doorbell for that qp.
- */
- rdev->qpshift = PAGE_SHIFT - ilog2(rdev->lldi.udb_density);
rdev->qpmask = rdev->lldi.udb_density - 1;
- rdev->cqshift = PAGE_SHIFT - ilog2(rdev->lldi.ucq_density);
rdev->cqmask = rdev->lldi.ucq_density - 1;
PDBG("%s dev %s stag start 0x%0x size 0x%0x num stags %d "
"pbl start 0x%0x size 0x%0x rq start 0x%0x size 0x%0x "
@@ -815,14 +809,12 @@ static int c4iw_rdev_open(struct c4iw_rdev *rdev)
rdev->lldi.vr->qp.size,
rdev->lldi.vr->cq.start,
rdev->lldi.vr->cq.size);
- PDBG("udb len 0x%x udb base %p db_reg %p gts_reg %p qpshift %lu "
- "qpmask 0x%x cqshift %lu cqmask 0x%x\n",
+ PDBG("udb len 0x%x udb base %p db_reg %p gts_reg %p "
+ "qpmask 0x%x cqmask 0x%x\n",
(unsigned)pci_resource_len(rdev->lldi.pdev, 2),
(void *)pci_resource_start(rdev->lldi.pdev, 2),
- rdev->lldi.db_reg,
- rdev->lldi.gts_reg,
- rdev->qpshift, rdev->qpmask,
- rdev->cqshift, rdev->cqmask);
+ rdev->lldi.db_reg, rdev->lldi.gts_reg,
+ rdev->qpmask, rdev->cqmask);
if (c4iw_num_stags(rdev) == 0) {
err = -EINVAL;