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| author | Matthew Gerlach <matthew.gerlach@linux.intel.com> | 2023-01-15 07:14:46 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-01-19 16:07:40 +0100 |
| commit | 4747ab89b4a652f835494fcf8342aaa0efb9b0fd (patch) | |
| tree | 3b2fc824ad508cbcb087c385f86a5661ad37e730 /drivers/fpga/dfl.h | |
| parent | 0926d8d52d42799806148ce6d57992849e57816c (diff) | |
| download | linux-4747ab89b4a652f835494fcf8342aaa0efb9b0fd.tar.gz linux-4747ab89b4a652f835494fcf8342aaa0efb9b0fd.tar.bz2 linux-4747ab89b4a652f835494fcf8342aaa0efb9b0fd.zip | |
fpga: dfl: add basic support for DFHv1
Version 1 of the Device Feature Header (DFH) definition adds
functionality to the Device Feature List (DFL) bus.
A DFHv1 header may have one or more parameter blocks that
further describes the HW to SW. Add support to the DFL bus
to parse the MSI-X parameter.
The location of a feature's register set is explicitly
described in DFHv1 and can be relative to the base of the DFHv1
or an absolute address. Parse the location and pass the information
to DFL driver.
Signed-off-by: Matthew Gerlach <matthew.gerlach@linux.intel.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20230115151447.1353428-4-matthew.gerlach@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/fpga/dfl.h')
| -rw-r--r-- | drivers/fpga/dfl.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/fpga/dfl.h b/drivers/fpga/dfl.h index fc59f33367ee..20eaddce6988 100644 --- a/drivers/fpga/dfl.h +++ b/drivers/fpga/dfl.h @@ -111,6 +111,10 @@ #define DFHv1_PARAM_HDR_NEXT_EOP BIT_ULL(32) #define DFHv1_PARAM_DATA 0x08 /* Offset of Param data from Param header */ +#define DFHv1_PARAM_ID_MSI_X 0x1 +#define DFHv1_PARAM_MSI_X_NUMV GENMASK_ULL(63, 32) +#define DFHv1_PARAM_MSI_X_STARTV GENMASK_ULL(31, 0) + /* Next AFU Register Bitfield */ #define NEXT_AFU_NEXT_DFH_OFST GENMASK_ULL(23, 0) /* Offset to next AFU */ @@ -263,6 +267,7 @@ struct dfl_feature_irq_ctx { * * @dev: ptr to pdev of the feature device which has the sub feature. * @id: sub feature id. + * @revision: revisition of the instance of a feature. * @resource_index: each sub feature has one mmio resource for its registers. * this index is used to find its mmio resource from the * feature dev (platform device)'s resources. @@ -272,6 +277,9 @@ struct dfl_feature_irq_ctx { * @ops: ops of this sub feature. * @ddev: ptr to the dfl device of this sub feature. * @priv: priv data of this feature. + * @dfh_version: version of the DFH + * @param_size: size of dfh parameters + * @params: point to memory copy of dfh parameters */ struct dfl_feature { struct platform_device *dev; @@ -284,6 +292,9 @@ struct dfl_feature { const struct dfl_feature_ops *ops; struct dfl_device *ddev; void *priv; + u8 dfh_version; + unsigned int param_size; + void *params; }; #define FEATURE_DEV_ID_UNUSED (-1) |