path: root/include/misc/cxl.h
diff options
authorFrederic Barrat <fbarrat@linux.vnet.ibm.com>2016-03-04 12:26:40 +0100
committerMichael Ellerman <mpe@ellerman.id.au>2016-03-09 23:40:00 +1100
commitd601ea918b878582e60b773f2f943d8d292b2abf (patch)
treed2bba34d1bc92b685d21c668c3abbde2c292a464 /include/misc/cxl.h
parentb40844aa55bb325de7509003c7529c75b0532412 (diff)
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/cxl.h')
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 */

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