IB/mthca: FMR ioremap fix

Addresses for ioremap must be calculated off of pci_resource_start;
we can't directly use the bus address as seen by the HCA.  Fix the
code that remaps device memory for FMR access.

Based on patch by Klaus Smolin.

Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

diff --git a/drivers/infiniband/hw/mthca/mthca_mr.c b/drivers/infiniband/hw/mthca/mthca_mr.c
index 25e1c1db9a405cca1b5c2fc457944e82dc6778d9..a486dec1707e27a648b1c6276c0bddb8fe48da99 100644 (file)
--- a/drivers/infiniband/hw/mthca/mthca_mr.c
+++ b/drivers/infiniband/hw/mthca/mthca_mr.c
@@ -761,6 +761,7 @@ void mthca_arbel_fmr_unmap(struct mthca_dev *dev, struct mthca_fmr *fmr)
 
 int __devinit mthca_init_mr_table(struct mthca_dev *dev)
 {
+       unsigned long addr;
        int err, i;
 
        err = mthca_alloc_init(&dev->mr_table.mpt_alloc,
@@ -796,9 +797,12 @@ int __devinit mthca_init_mr_table(struct mthca_dev *dev)
                        goto err_fmr_mpt;
                }
 
+               addr = pci_resource_start(dev->pdev, 4) +
+                       ((pci_resource_len(dev->pdev, 4) - 1) &
+                        dev->mr_table.mpt_base);
+
                dev->mr_table.tavor_fmr.mpt_base =
-                       ioremap(dev->mr_table.mpt_base,
-                               (1 << i) * sizeof (struct mthca_mpt_entry));
+                       ioremap(addr, (1 << i) * sizeof(struct mthca_mpt_entry));
 
                if (!dev->mr_table.tavor_fmr.mpt_base) {
                        mthca_warn(dev, "MPT ioremap for FMR failed.\n");
@@ -806,9 +810,12 @@ int __devinit mthca_init_mr_table(struct mthca_dev *dev)
                        goto err_fmr_mpt;
                }
 
+               addr = pci_resource_start(dev->pdev, 4) +
+                       ((pci_resource_len(dev->pdev, 4) - 1) &
+                        dev->mr_table.mtt_base);
+
                dev->mr_table.tavor_fmr.mtt_base =
-                       ioremap(dev->mr_table.mtt_base,
-                               (1 << i) * MTHCA_MTT_SEG_SIZE);
+                       ioremap(addr, (1 << i) * MTHCA_MTT_SEG_SIZE);
                if (!dev->mr_table.tavor_fmr.mtt_base) {
                        mthca_warn(dev, "MTT ioremap for FMR failed.\n");
                        err = -ENOMEM;