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| author | Frederic Barrat <fbarrat@linux.vnet.ibm.com> | 2016-03-04 12:26:40 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2016-03-09 23:40:00 +1100 |
| commit | d601ea918b878582e60b773f2f943d8d292b2abf (patch) | |
| tree | d2bba34d1bc92b685d21c668c3abbde2c292a464 /include/misc | |
| parent | b40844aa55bb325de7509003c7529c75b0532412 (diff) | |
| download | linux-d601ea918b878582e60b773f2f943d8d292b2abf.tar.bz2 | |
cxl: Support the cxl kernel API from a guest
Like on bare-metal, the cxl driver creates a virtual PHB and a pci
device for the AFU. The configuration space of the device is mapped to
the configuration record of the AFU.
Reuse the code defined in afu_cr_read8|16|32() when reading the
configuration space of the AFU device.
Even though the (virtual) AFU device is a pci device, the adapter is
not. So a driver using the cxl kernel API cannot read the VPD of the
adapter through the usual PCI interface. Therefore, we add a call to
the cxl kernel API:
ssize_t cxl_read_adapter_vpd(struct pci_dev *dev, void *buf, size_t count);
Co-authored-by: Christophe Lombard <clombard@linux.vnet.ibm.com>
Signed-off-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Signed-off-by: Christophe Lombard <clombard@linux.vnet.ibm.com>
Reviewed-by: Manoj Kumar <manoj@linux.vnet.ibm.com>
Acked-by: Ian Munsie <imunsie@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'include/misc')
| -rw-r--r-- | include/misc/cxl.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/misc/cxl.h b/include/misc/cxl.h index f2ffe5bd720d..5bcf11a29f2a 100644 --- a/include/misc/cxl.h +++ b/include/misc/cxl.h @@ -210,4 +210,9 @@ ssize_t cxl_fd_read(struct file *file, char __user *buf, size_t count, void cxl_perst_reloads_same_image(struct cxl_afu *afu, bool perst_reloads_same_image); +/* + * Read the VPD for the card where the AFU resides + */ +ssize_t cxl_read_adapter_vpd(struct pci_dev *dev, void *buf, size_t count); + #endif /* _MISC_CXL_H */ |