common/sfc_efx/base: add efsys API to find a memory BAR

Function control window lookup needs memory BARs handles to
search Xilinx capabilities tables.

Define an API to get a memory BAR handle by a PCIe device handle and
BAR index.

Signed-off-by: Igor Romanov <igor.romanov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>

diff --git a/drivers/common/sfc_efx/base/rhead_pci.c b/drivers/common/sfc_efx/base/rhead_pci.c
index f8e372b..47e89cf 100644 (file)
--- a/drivers/common/sfc_efx/base/rhead_pci.c
+++ b/drivers/common/sfc_efx/base/rhead_pci.c
@@ -20,6 +20,7 @@ rhead_pci_nic_membar_lookup(
        size_t pci_capa_offset = 0;
        boolean_t bar_found = B_FALSE;
        efx_rc_t rc = ENOENT;
+       efsys_bar_t xil_eb;
 
        /*
         * SF-119689-TC Riverhead Host Interface section 4.2.2. describes
@@ -50,13 +51,19 @@ rhead_pci_nic_membar_lookup(
                }
 
                xilinx_tbl_found = B_TRUE;
+
+               EFSYS_PCI_FIND_MEM_BAR(espcp, xilinx_tbl_bar, &xil_eb, &rc);
+               if (rc != 0)
+                       goto fail2;
        }
 
        if (bar_found == B_FALSE)
-               goto fail2;
+               goto fail3;
 
        return (0);
 
+fail3:
+       EFSYS_PROBE(fail3);
 fail2:
        EFSYS_PROBE(fail2);
 fail1: