git: b8ab635de4b5 - stable/14 - iavf(4): Get MSI-X BAR index at runtime instead of hardcoding it

The branch stable/14 has been updated by erj:

URL: https://cgit.FreeBSD.org/src/commit/?id=b8ab635de4b5cac9eb91dff57e9457d7d1f7f533

commit b8ab635de4b5cac9eb91dff57e9457d7d1f7f533
Author:     Eric Joyner <erj@FreeBSD.org>
AuthorDate: 2024-08-30 00:58:55 +0000
Commit:     Eric Joyner <erj@FreeBSD.org>
CommitDate: 2024-10-31 16:54:24 +0000

    iavf(4): Get MSI-X BAR index at runtime instead of hardcoding it
    
    This allows iavf to load on E830 devices since those devices place their MSI-X
    BAR at a different location than in previous 800 series products.
    
    Signed-off-by: Eric Joyner <erj@FreeBSD.org>
    
    Sponsored by:   Intel Corporation
    Differential Revision:  https://reviews.freebsd.org/D46952
    
    (cherry picked from commit e53a21abdf2953714e44e3c54b4bb78557cb096c)
---
 sys/dev/iavf/iavf_lib.c      | 7 ++++---
 sys/dev/iavf/if_iavf_iflib.c | 4 ++--
 2 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/sys/dev/iavf/iavf_lib.c b/sys/dev/iavf/iavf_lib.c
index f80e3765448f..3116ce0501c2 100644
--- a/sys/dev/iavf/iavf_lib.c
+++ b/sys/dev/iavf/iavf_lib.c
@@ -1,5 +1,5 @@
 /* SPDX-License-Identifier: BSD-3-Clause */
-/*  Copyright (c) 2021, Intel Corporation
+/*  Copyright (c) 2024, Intel Corporation
  *  All rights reserved.
  *
  *  Redistribution and use in source and binary forms, with or without
@@ -1479,10 +1479,11 @@ iavf_update_msix_devinfo(device_t dev)
 {
 	struct pci_devinfo *dinfo;
 	u32 msix_ctrl;
+	u8 msix_location;
 
 	dinfo = (struct pci_devinfo *)device_get_ivars(dev);
-	/* We can hardcode this offset since we know the device */
-	msix_ctrl = pci_read_config(dev, 0x70 + PCIR_MSIX_CTRL, 2);
+	msix_location = dinfo->cfg.msix.msix_location;
+	msix_ctrl = pci_read_config(dev, msix_location + PCIR_MSIX_CTRL, 2);
 	dinfo->cfg.msix.msix_ctrl = msix_ctrl;
 	dinfo->cfg.msix.msix_msgnum = (msix_ctrl & PCIM_MSIXCTRL_TABLE_SIZE) + 1;
 }
diff --git a/sys/dev/iavf/if_iavf_iflib.c b/sys/dev/iavf/if_iavf_iflib.c
index 714d34eeebe5..d460df6e0d25 100644
--- a/sys/dev/iavf/if_iavf_iflib.c
+++ b/sys/dev/iavf/if_iavf_iflib.c
@@ -1,5 +1,5 @@
 /* SPDX-License-Identifier: BSD-3-Clause */
-/*  Copyright (c) 2021, Intel Corporation
+/*  Copyright (c) 2024, Intel Corporation
  *  All rights reserved.
  *
  *  Redistribution and use in source and binary forms, with or without
@@ -370,7 +370,7 @@ iavf_if_attach_pre(if_ctx_t ctx)
 	}
 	scctx->isc_rxqsizes[0] = roundup2(scctx->isc_nrxd[0]
 	    * sizeof(union iavf_32byte_rx_desc), DBA_ALIGN);
-	scctx->isc_msix_bar = PCIR_BAR(IAVF_MSIX_BAR);
+	scctx->isc_msix_bar = pci_msix_table_bar(dev);
 	scctx->isc_tx_nsegments = IAVF_MAX_TX_SEGS;
 	scctx->isc_tx_tso_segments_max = IAVF_MAX_TSO_SEGS;
 	scctx->isc_tx_tso_size_max = IAVF_TSO_SIZE;