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| author | Matthew Gerlach <matthew.gerlach@linux.intel.com> | 2022-05-05 06:06:17 -0400 |
|---|---|---|
| committer | Xu Yilun <yilun.xu@intel.com> | 2022-05-10 16:05:38 +0800 |
| commit | ae23f746d7442909a19bd43397b567145d6e5db3 (patch) | |
| tree | a9fd2fa3bcb41b23ee96dbbfe589c1804c6fd7b1 /drivers/fpga/dfl-pci.c | |
| parent | 2b28c9e0fe97fa2bae2ab52540a2970c0d3bdf8d (diff) | |
| download | linux-ae23f746d7442909a19bd43397b567145d6e5db3.tar.gz | |
fpga: dfl: Allow Port to be linked to FME's DFL
Currently we use PORTn_OFFSET to locate PORT DFLs, and PORT DFLs are not
connected FME DFL. But for some cases (e.g. Intel Open FPGA Stack device),
PORT DFLs are connected to FME DFL directly, so we don't need to search
PORT DFLs via PORTn_OFFSET again. If BAR value of PORTn_OFFSET is 0x7
(FME_PORT_OFST_BAR_SKIP) then driver will skip searching the DFL for that
port. If BAR value is invalid, return -EINVAL.
Signed-off-by: Matthew Gerlach <matthew.gerlach@linux.intel.com>
Signed-off-by: Tianfei Zhang <tianfei.zhang@intel.com>
Acked-by: Wu Hao <hao.wu@intel.com>
Link: https://lore.kernel.org/r/20220505100617.703672-1-tianfei.zhang@intel.com
Signed-off-by: Xu Yilun <yilun.xu@intel.com>
Diffstat (limited to 'drivers/fpga/dfl-pci.c')
| -rw-r--r-- | drivers/fpga/dfl-pci.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/fpga/dfl-pci.c b/drivers/fpga/dfl-pci.c index 717ac9715970..fd1fa55c9113 100644 --- a/drivers/fpga/dfl-pci.c +++ b/drivers/fpga/dfl-pci.c @@ -259,6 +259,15 @@ static int find_dfls_by_default(struct pci_dev *pcidev, */ bar = FIELD_GET(FME_PORT_OFST_BAR_ID, v); offset = FIELD_GET(FME_PORT_OFST_DFH_OFST, v); + if (bar == FME_PORT_OFST_BAR_SKIP) { + continue; + } else if (bar >= PCI_STD_NUM_BARS) { + dev_err(&pcidev->dev, "bad BAR %d for port %d\n", + bar, i); + ret = -EINVAL; + break; + } + start = pci_resource_start(pcidev, bar) + offset; len = pci_resource_len(pcidev, bar) - offset; |