RDMA/qedr: notify user application if DPM is supported

Direct Packet Mode support may be disabled, e.g, due to limited
resources. Notifying the user application prevents wasting cycles
on attempting to send these kind of packets.

Signed-off-by: Ram Amrani <Ram.Amrani@cavium.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

diff --git a/drivers/infiniband/hw/qedr/main.c b/drivers/infiniband/hw/qedr/main.c
index 0ae30f5c8cbc8b666e3f9640da066a503ab930de..199b6edbef92c15a4539e02a98299ff7d5920d16 100644 (file)
--- a/drivers/infiniband/hw/qedr/main.c
+++ b/drivers/infiniband/hw/qedr/main.c
@@ -777,6 +777,7 @@ static struct qedr_dev *qedr_add(struct qed_dev *cdev, struct pci_dev *pdev,
        if (rc)
                goto init_err;
 
+       dev->user_dpm_enabled = dev_info.user_dpm_enabled;
        dev->num_hwfns = dev_info.common.num_hwfns;
        dev->rdma_ctx = dev->ops->rdma_get_rdma_ctx(cdev);
 

diff --git a/drivers/infiniband/hw/qedr/qedr.h b/drivers/infiniband/hw/qedr/qedr.h
index 392e76e268406b36000e0e5f165e6a81938d1e74..b2bb42e2805ddfb220b7033620d988e0877f3d6a 100644 (file)
--- a/drivers/infiniband/hw/qedr/qedr.h
+++ b/drivers/infiniband/hw/qedr/qedr.h
@@ -162,6 +162,8 @@ struct qedr_dev {
        struct qedr_qp          *gsi_qp;
 
        unsigned long enet_state;
+
+       u8 user_dpm_enabled;
 };
 
 #define QEDR_MAX_SQ_PBL                        (0x8000)

diff --git a/drivers/infiniband/hw/qedr/verbs.c b/drivers/infiniband/hw/qedr/verbs.c
index 2ae71b8f1ba8a49f1c2aae0e6c59908ed4063093..4322ee00498efc9b73af8f8a1db8d2856afc512e 100644 (file)
--- a/drivers/infiniband/hw/qedr/verbs.c
+++ b/drivers/infiniband/hw/qedr/verbs.c
@@ -376,6 +376,7 @@ struct ib_ucontext *qedr_alloc_ucontext(struct ib_device *ibdev,
 
        memset(&uresp, 0, sizeof(uresp));
 
+       uresp.dpm_enabled = dev->user_dpm_enabled;
        uresp.db_pa = ctx->dpi_phys_addr;
        uresp.db_size = ctx->dpi_size;
        uresp.max_send_wr = dev->attr.max_sqe;

diff --git a/include/uapi/rdma/qedr-abi.h b/include/uapi/rdma/qedr-abi.h
index 75c270d839c8d5097757baf8644a0426db4fb16f..2684004ec4fd5ae2b413b0bfdba31994131b00bd 100644 (file)
--- a/include/uapi/rdma/qedr-abi.h
+++ b/include/uapi/rdma/qedr-abi.h
@@ -49,6 +49,7 @@ struct qedr_alloc_ucontext_resp {
        __u32 sges_per_recv_wr;
        __u32 sges_per_srq_wr;
        __u32 max_cqes;
+       __u8 dpm_enabled;
 };
 
 struct qedr_alloc_pd_ureq {