RDMA/cxgb3: Fix MR permission problems

Fix memory region permission problems:

- remove useless and redundant iwch_mem_perms enum.

- create ib_to_tpt_access_rights() for mapping ib access rights
  to T3 TPT permissions.

- create ib_to_mwbind_access_rights() for mapping ib access rights
  to T3 MWBIND WR permissions.

- fix up the mem reg code to utilize the new functions.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

3 files changed, 18 insertions, 41 deletions

diff --git a/drivers/infiniband/hw/cxgb3/iwch_provider.c b/drivers/infiniband/hw/cxgb3/iwch_provider.c
index 9fe7dfeb7c8..f2774ae906b 100644
--- a/drivers/infiniband/hw/cxgb3/iwch_provider.c
+++ b/drivers/infiniband/hw/cxgb3/iwch_provider.c
@@ -465,9 +465,6 @@ static struct ib_mr *iwch_register_phys_mem(struct ib_pd *pd,
         php = to_iwch_pd(pd);
         rhp = php->rhp;
 
-        acc = iwch_convert_access(acc);
-
-
         mhp = kzalloc(sizeof(*mhp), GFP_KERNEL);
         if (!mhp)
                 return ERR_PTR(-ENOMEM);
@@ -493,12 +490,7 @@ static struct ib_mr *iwch_register_phys_mem(struct ib_pd *pd,
         mhp->attr.pdid = php->pdid;
         mhp->attr.zbva = 0;
 
-        /* NOTE: TPT perms are backwards from BIND WR perms! */
-        mhp->attr.perms = (acc & 0x1) << 3;
-        mhp->attr.perms |= (acc & 0x2) << 1;
-        mhp->attr.perms |= (acc & 0x4) >> 1;
-        mhp->attr.perms |= (acc & 0x8) >> 3;
-
+        mhp->attr.perms = iwch_ib_to_tpt_access(acc);
         mhp->attr.va_fbo = *iova_start;
         mhp->attr.page_size = shift - 12;
 
@@ -527,7 +519,6 @@ static int iwch_reregister_phys_mem(struct ib_mr *mr,
         struct iwch_mr mh, *mhp;
         struct iwch_pd *php;
         struct iwch_dev *rhp;
-        int new_acc;
         __be64 *page_list = NULL;
         int shift = 0;
         u64 total_size;
@@ -548,14 +539,12 @@ static int iwch_reregister_phys_mem(struct ib_mr *mr,
         if (rhp != php->rhp)
                 return -EINVAL;
 
-        new_acc = mhp->attr.perms;
-
         memcpy(&mh, mhp, sizeof *mhp);
 
         if (mr_rereg_mask & IB_MR_REREG_PD)
                 php = to_iwch_pd(pd);
         if (mr_rereg_mask & IB_MR_REREG_ACCESS)
-                mh.attr.perms = iwch_convert_access(acc);
+                mh.attr.perms = iwch_ib_to_tpt_access(acc);
         if (mr_rereg_mask & IB_MR_REREG_TRANS)
                 ret = build_phys_page_list(buffer_list, num_phys_buf,
                                            iova_start,
@@ -570,7 +559,7 @@ static int iwch_reregister_phys_mem(struct ib_mr *mr,
         if (mr_rereg_mask & IB_MR_REREG_PD)
                 mhp->attr.pdid = php->pdid;
         if (mr_rereg_mask & IB_MR_REREG_ACCESS)
-                mhp->attr.perms = acc;
+                mhp->attr.perms = iwch_ib_to_tpt_access(acc);
         if (mr_rereg_mask & IB_MR_REREG_TRANS) {
                 mhp->attr.zbva = 0;
                 mhp->attr.va_fbo = *iova_start;
@@ -615,8 +604,6 @@ static struct ib_mr *iwch_reg_user_mr(struct ib_pd *pd, struct ib_umem *region,
                 goto err;
         }
 
-        acc = iwch_convert_access(acc);
-
         i = n = 0;
 
         list_for_each_entry(chunk, &region->chunk_list, list)
@@ -632,10 +619,7 @@ static struct ib_mr *iwch_reg_user_mr(struct ib_pd *pd, struct ib_umem *region,
         mhp->rhp = rhp;
         mhp->attr.pdid = php->pdid;
         mhp->attr.zbva = 0;
-        mhp->attr.perms = (acc & 0x1) << 3;
-        mhp->attr.perms |= (acc & 0x2) << 1;
-        mhp->attr.perms |= (acc & 0x4) >> 1;
-        mhp->attr.perms |= (acc & 0x8) >> 3;
+        mhp->attr.perms = iwch_ib_to_tpt_access(acc);
         mhp->attr.va_fbo = region->virt_base;
         mhp->attr.page_size = shift - 12;
         mhp->attr.len = (u32) region->length;
diff --git a/drivers/infiniband/hw/cxgb3/iwch_provider.h b/drivers/infiniband/hw/cxgb3/iwch_provider.h
index de0fe1b93a0..93bcc56756b 100644
--- a/drivers/infiniband/hw/cxgb3/iwch_provider.h
+++ b/drivers/infiniband/hw/cxgb3/iwch_provider.h
@@ -286,27 +286,20 @@ static inline int iwch_convert_state(enum ib_qp_state ib_state)
         }
 }
 
-enum iwch_mem_perms {
-        IWCH_MEM_ACCESS_LOCAL_READ = 1 << 0,
-        IWCH_MEM_ACCESS_LOCAL_WRITE = 1 << 1,
-        IWCH_MEM_ACCESS_REMOTE_READ = 1 << 2,
-        IWCH_MEM_ACCESS_REMOTE_WRITE = 1 << 3,
-        IWCH_MEM_ACCESS_ATOMICS = 1 << 4,
-        IWCH_MEM_ACCESS_BINDING = 1 << 5,
-        IWCH_MEM_ACCESS_LOCAL =
-            (IWCH_MEM_ACCESS_LOCAL_READ | IWCH_MEM_ACCESS_LOCAL_WRITE),
-        IWCH_MEM_ACCESS_REMOTE =
-            (IWCH_MEM_ACCESS_REMOTE_WRITE | IWCH_MEM_ACCESS_REMOTE_READ)
-            /* cannot go beyond 1 << 31 */
-} __attribute__ ((packed));
-
-static inline u32 iwch_convert_access(int acc)
+static inline u32 iwch_ib_to_tpt_access(int acc)
 {
-        return (acc & IB_ACCESS_REMOTE_WRITE ? IWCH_MEM_ACCESS_REMOTE_WRITE : 0)
-            | (acc & IB_ACCESS_REMOTE_READ ? IWCH_MEM_ACCESS_REMOTE_READ : 0) |
-            (acc & IB_ACCESS_LOCAL_WRITE ? IWCH_MEM_ACCESS_LOCAL_WRITE : 0) |
-            (acc & IB_ACCESS_MW_BIND ? IWCH_MEM_ACCESS_BINDING : 0) |
-            IWCH_MEM_ACCESS_LOCAL_READ;
+        return (acc & IB_ACCESS_REMOTE_WRITE ? TPT_REMOTE_WRITE : 0) |
+               (acc & IB_ACCESS_REMOTE_READ ? TPT_REMOTE_READ : 0) |
+               (acc & IB_ACCESS_LOCAL_WRITE ? TPT_LOCAL_WRITE : 0) |
+               TPT_LOCAL_READ;
+}
+
+static inline u32 iwch_ib_to_mwbind_access(int acc)
+{
+        return (acc & IB_ACCESS_REMOTE_WRITE ? T3_MEM_ACCESS_REM_WRITE : 0) |
+               (acc & IB_ACCESS_REMOTE_READ ? T3_MEM_ACCESS_REM_READ : 0) |
+               (acc & IB_ACCESS_LOCAL_WRITE ? T3_MEM_ACCESS_LOCAL_WRITE : 0) |
+               T3_MEM_ACCESS_LOCAL_READ;
 }
 
 enum iwch_mmid_state {
diff --git a/drivers/infiniband/hw/cxgb3/iwch_qp.c b/drivers/infiniband/hw/cxgb3/iwch_qp.c
index 9ea00cc4a5f..0a472c9b44d 100644
--- a/drivers/infiniband/hw/cxgb3/iwch_qp.c
+++ b/drivers/infiniband/hw/cxgb3/iwch_qp.c
@@ -439,7 +439,7 @@ int iwch_bind_mw(struct ib_qp *qp,
         wqe->bind.type = T3_VA_BASED_TO;
 
         /* TBD: check perms */
-        wqe->bind.perms = iwch_convert_access(mw_bind->mw_access_flags);
+        wqe->bind.perms = iwch_ib_to_mwbind_access(mw_bind->mw_access_flags);
         wqe->bind.mr_stag = cpu_to_be32(mw_bind->mr->lkey);
         wqe->bind.mw_stag = cpu_to_be32(mw->rkey);
         wqe->bind.mw_len = cpu_to_be32(mw_bind->length);