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RDMA/bnxt_re: Fail probe early when not enough MSI-x vectors are reserved

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L2 driver allocates and populates the MSI-x vector details for RoCE
in the en_dev structure. RoCE driver requires minimum 2 MSIx vectors.
Hence during probe, driver has to check and bail out if there are not
enough MSI-x vectors reserved for it before proceeding further
initialization.

Reviewed-by: Andy Gospodarek <andrew.gospodarek@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
Reviewed-by: Hongguang Gao <hongguang.gao@broadcom.com>
Reviewed-by: Bhargava Chenna Marreddy <bhargava.marreddy@broadcom.com>
Reviewed-by: Kashyap Desai <kashyap.desai@broadcom.com>
Reviewed-by: Chandramohan Akula <chandramohan.akula@broadcom.com>
Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Link: https://patch.msgid.link/1731577748-1804-2-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
This commit is contained in:
Kalesh AP 2024-11-14 01:49:05 -08:00 committed by Leon Romanovsky
parent faa62440a5
commit 65ecee1327
2 changed files with 14 additions and 10 deletions
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2
drivers/infiniband/hw/bnxt_re/bnxt_re.h
View File

@ -154,6 +154,8 @@ struct bnxt_re_pacing {
#define BNXT_RE_GRC_FIFO_REG_BASE 0x2000
#define BNXT_RE_MIN_MSIX 2
#define MAX_CQ_HASH_BITS (16)
#define MAX_SRQ_HASH_BITS (16)

22
drivers/infiniband/hw/bnxt_re/main.c
View File

@ -1936,6 +1936,18 @@ static int bnxt_re_dev_init(struct bnxt_re_dev *rdev, u8 op_type)
}
set_bit(BNXT_RE_FLAG_NETDEV_REGISTERED, &rdev->flags);
if (rdev->en_dev->ulp_tbl->msix_requested < BNXT_RE_MIN_MSIX) {
ibdev_err(&rdev->ibdev,
"RoCE requires minimum 2 MSI-X vectors, but only %d reserved\n",
rdev->en_dev->ulp_tbl->msix_requested);
bnxt_unregister_dev(rdev->en_dev);
clear_bit(BNXT_RE_FLAG_NETDEV_REGISTERED, &rdev->flags);
return -EINVAL;
}
ibdev_dbg(&rdev->ibdev, "Got %d MSI-X vectors\n",
rdev->en_dev->ulp_tbl->msix_requested);
rdev->num_msix = rdev->en_dev->ulp_tbl->msix_requested;
rc = bnxt_re_setup_chip_ctx(rdev);
if (rc) {
bnxt_unregister_dev(rdev->en_dev);
@ -1947,16 +1959,6 @@ static int bnxt_re_dev_init(struct bnxt_re_dev *rdev, u8 op_type)
/* Check whether VF or PF */
bnxt_re_get_sriov_func_type(rdev);
if (!rdev->en_dev->ulp_tbl->msix_requested) {
ibdev_err(&rdev->ibdev,
"Failed to get MSI-X vectors: %#x\n", rc);
rc = -EINVAL;
goto fail;
}
ibdev_dbg(&rdev->ibdev, "Got %d MSI-X vectors\n",
rdev->en_dev->ulp_tbl->msix_requested);
rdev->num_msix = rdev->en_dev->ulp_tbl->msix_requested;
bnxt_re_query_hwrm_intf_version(rdev);
/* Establish RCFW Communication Channel to initialize the context