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| author | Vaibhav Jain <vaibhav@linux.vnet.ibm.com> | 2015-04-29 15:47:23 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2015-06-03 13:27:15 +1000 |
| commit | 27d4dc7116eed98775902627ba61b70e9045e321 (patch) | |
| tree | 1fd00dbdc54706726c892cb2fe22e699f2809ce3 /drivers/misc/cxl/cxl.h | |
| parent | 989898b707f74716ec27a4ae2b57e404ca54cbd2 (diff) | |
| download | kernel_replicant_linux-27d4dc7116eed98775902627ba61b70e9045e321.tar.gz kernel_replicant_linux-27d4dc7116eed98775902627ba61b70e9045e321.tar.bz2 kernel_replicant_linux-27d4dc7116eed98775902627ba61b70e9045e321.zip | |
cxl: Implement an ioctl to fetch afu card-id, offset-id and mode
Given a file descriptor on an afu device, libcxl currently uses the
major/minor number obtained from fstat on the fd to construct path to
the afu's sysfs directory. However it is possible that rather than using
one of the device in /dev/cxl, a kernel driver creates its own device
which export generic cxl interface to the userspace. This causes
problems with libcxl as it tries to use a wrong major/minor number to
construct the sysfs path and fail.
So this patch introduces a new ioctl called CXL_IOCTL_GET_AFU_ID on the
afu file descriptor to fetch the cxl_afu_id struct that holds the
card/offset-id and mode information. These info is then used by libcxl to
construct the correct path to the afu sysfs directory.
Testing:
- Build against pseries be/le configs
- Testing with corresponding libcxl changes to verify that it constructs
right sysfs path to the afu.
Signed-off-by: Vaibhav Jain <vaibhav@linux.vnet.ibm.com>
Acked-by: Ian Munsie <imunsie@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'drivers/misc/cxl/cxl.h')
| -rw-r--r-- | drivers/misc/cxl/cxl.h | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/drivers/misc/cxl/cxl.h b/drivers/misc/cxl/cxl.h index a1cee4767ec6..9f280e3e742e 100644 --- a/drivers/misc/cxl/cxl.h +++ b/drivers/misc/cxl/cxl.h @@ -315,8 +315,6 @@ static const cxl_p2n_reg_t CXL_PSL_WED_An = {0x0A0}; #define CXL_MAX_SLICES 4 #define MAX_AFU_MMIO_REGS 3 -#define CXL_MODE_DEDICATED 0x1 -#define CXL_MODE_DIRECTED 0x2 #define CXL_MODE_TIME_SLICED 0x4 #define CXL_SUPPORTED_MODES (CXL_MODE_DEDICATED | CXL_MODE_DIRECTED) |