|author||Daniel Axtens <firstname.lastname@example.org>||2015-08-14 17:41:25 +1000|
|committer||Michael Ellerman <email@example.com>||2015-08-14 21:32:07 +1000|
|parent||cxl: Don't remove AFUs/vPHBs in cxl_reset (diff)|
cxl: Allow the kernel to trust that an image won't change on PERST.
Provide a kernel API and a sysfs entry which allow a user to specify that when a card is PERSTed, it's image will stay the same, allowing it to participate in EEH. cxl_reset is used to reflash the card. In that case, we cannot safely assert that the image will not change. Therefore, disallow cxl_reset if the flag is set. Signed-off-by: Daniel Axtens <firstname.lastname@example.org> Signed-off-by: Michael Ellerman <email@example.com>
Diffstat (limited to 'include/misc')
1 files changed, 10 insertions, 0 deletions
diff --git a/include/misc/cxl.h b/include/misc/cxl.h
index 7a6c1d6cc173..f2ffe5bd720d 100644
@@ -200,4 +200,14 @@ unsigned int cxl_fd_poll(struct file *file, struct poll_table_struct *poll);
ssize_t cxl_fd_read(struct file *file, char __user *buf, size_t count,
+ * For EEH, a driver may want to assert a PERST will reload the same image
+ * from flash into the FPGA.
+ * This is a property of the entire adapter, not a single AFU, so drivers
+ * should set this property with care!
+void cxl_perst_reloads_same_image(struct cxl_afu *afu,
+ bool perst_reloads_same_image);
#endif /* _MISC_CXL_H */