i40iw: Query device accounts for internal rsrc

Some resources are consumed internally and not available to the user.
After hw is initialized, figure out how many resources are consumed
and subtract those numbers from the initial max device capability in
i40iw_query_device().

Signed-off-by: Henry Orosco <henry.orosco@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

5 files changed, 26 insertions, 6 deletions

diff --git a/drivers/infiniband/hw/i40iw/i40iw.h b/drivers/infiniband/hw/i40iw/i40iw.h
index 4a0c12bd9caa..dac9a6bcc631 100644
--- a/drivers/infiniband/hw/i40iw/i40iw.h
+++ b/drivers/infiniband/hw/i40iw/i40iw.h
@@ -303,6 +303,10 @@ struct i40iw_device {
         u32 mr_stagmask;
         u32 mpa_version;
         bool dcb;
+        u32 used_pds;
+        u32 used_cqs;
+        u32 used_mrs;
+        u32 used_qps;
 };
 
 struct i40iw_ib_device {
diff --git a/drivers/infiniband/hw/i40iw/i40iw_hw.c b/drivers/infiniband/hw/i40iw/i40iw_hw.c
index b94727ffc862..5e2c16c725e3 100644
--- a/drivers/infiniband/hw/i40iw/i40iw_hw.c
+++ b/drivers/infiniband/hw/i40iw/i40iw_hw.c
@@ -62,7 +62,7 @@ u32 i40iw_initialize_hw_resources(struct i40iw_device *iwdev)
         max_mr = iwdev->sc_dev.hmc_info->hmc_obj[I40IW_HMC_IW_MR].cnt;
         arp_table_size = iwdev->sc_dev.hmc_info->hmc_obj[I40IW_HMC_IW_ARP].cnt;
         iwdev->max_cqe = 0xFFFFF;
-        num_pds = max_qp * 4;
+        num_pds = I40IW_MAX_PDS;
         resources_size = sizeof(struct i40iw_arp_entry) * arp_table_size;
         resources_size += sizeof(unsigned long) * BITS_TO_LONGS(max_qp);
         resources_size += sizeof(unsigned long) * BITS_TO_LONGS(max_mr);
diff --git a/drivers/infiniband/hw/i40iw/i40iw_main.c b/drivers/infiniband/hw/i40iw/i40iw_main.c
index db9fd31b5c72..9d3b9ee20ba7 100644
--- a/drivers/infiniband/hw/i40iw/i40iw_main.c
+++ b/drivers/infiniband/hw/i40iw/i40iw_main.c
@@ -1558,6 +1558,20 @@ exit:
 }
 
 /**
+ * i40iw_get_used_rsrc - determine resources used internally
+ * @iwdev: iwarp device
+ *
+ * Called after internal allocations
+ */
+static void i40iw_get_used_rsrc(struct i40iw_device *iwdev)
+{
+        iwdev->used_pds = find_next_zero_bit(iwdev->allocated_pds, iwdev->max_pd, 0);
+        iwdev->used_qps = find_next_zero_bit(iwdev->allocated_qps, iwdev->max_qp, 0);
+        iwdev->used_cqs = find_next_zero_bit(iwdev->allocated_cqs, iwdev->max_cq, 0);
+        iwdev->used_mrs = find_next_zero_bit(iwdev->allocated_mrs, iwdev->max_mr, 0);
+}
+
+/**
  * i40iw_open - client interface operation open for iwarp/uda device
  * @ldev: lan device information
  * @client: iwarp client information, provided during registration
@@ -1629,6 +1643,7 @@ static int i40iw_open(struct i40e_info *ldev, struct i40e_client *client)
                 status = i40iw_initialize_hw_resources(iwdev);
                 if (status)
                         break;
+                i40iw_get_used_rsrc(iwdev);
                 dev->ccq_ops->ccq_arm(dev->ccq);
                 status = i40iw_hmc_init_pble(&iwdev->sc_dev, iwdev->pble_rsrc);
                 if (status)
diff --git a/drivers/infiniband/hw/i40iw/i40iw_user.h b/drivers/infiniband/hw/i40iw/i40iw_user.h
index e65c2baa7db2..66263fced68f 100644
--- a/drivers/infiniband/hw/i40iw/i40iw_user.h
+++ b/drivers/infiniband/hw/i40iw/i40iw_user.h
@@ -76,7 +76,8 @@ enum i40iw_device_capabilities_const {
         I40IW_MAX_ORD_SIZE =                    127,
         I40IW_MAX_WQ_ENTRIES =                  2048,
         I40IW_Q2_BUFFER_SIZE =                  (248 + 100),
-        I40IW_QP_CTX_SIZE =                     248
+        I40IW_QP_CTX_SIZE =                     248,
+        I40IW_MAX_PDS =                         32768
 };
 
 #define i40iw_handle void *
diff --git a/drivers/infiniband/hw/i40iw/i40iw_verbs.c b/drivers/infiniband/hw/i40iw/i40iw_verbs.c
index 6b516d6156dc..d20ee118f366 100644
--- a/drivers/infiniband/hw/i40iw/i40iw_verbs.c
+++ b/drivers/infiniband/hw/i40iw/i40iw_verbs.c
@@ -67,13 +67,13 @@ static int i40iw_query_device(struct ib_device *ibdev,
         props->vendor_part_id = iwdev->ldev->pcidev->device;
         props->hw_ver = (u32)iwdev->sc_dev.hw_rev;
         props->max_mr_size = I40IW_MAX_OUTBOUND_MESSAGE_SIZE;
-        props->max_qp = iwdev->max_qp;
+        props->max_qp = iwdev->max_qp - iwdev->used_qps;
         props->max_qp_wr = (I40IW_MAX_WQ_ENTRIES >> 2) - 1;
         props->max_sge = I40IW_MAX_WQ_FRAGMENT_COUNT;
-        props->max_cq = iwdev->max_cq;
+        props->max_cq = iwdev->max_cq - iwdev->used_cqs;
         props->max_cqe = iwdev->max_cqe;
-        props->max_mr = iwdev->max_mr;
-        props->max_pd = iwdev->max_pd;
+        props->max_mr = iwdev->max_mr - iwdev->used_mrs;
+        props->max_pd = iwdev->max_pd - iwdev->used_pds;
         props->max_sge_rd = I40IW_MAX_SGE_RD;
         props->max_qp_rd_atom = I40IW_MAX_IRD_SIZE;
         props->max_qp_init_rd_atom = props->max_qp_rd_atom;