cxl: Export AFU error buffer via sysfs
Export the "AFU Error Buffer" via sysfs attribute (afu_err_buf). AFU
error buffer is used by the AFU to report application specific
errors. The contents of this buffer are AFU specific and are intended to
be interpreted by the application interacting with the afu.
Suggested-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Vaibhav Jain <vaibhav@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
diff --git a/drivers/misc/cxl/cxl.h b/drivers/misc/cxl/cxl.h
index 9f280e3..cfee819 100644
--- a/drivers/misc/cxl/cxl.h
+++ b/drivers/misc/cxl/cxl.h
@@ -360,6 +360,10 @@
struct mutex spa_mutex;
spinlock_t afu_cntl_lock;
+ /* AFU error buffer fields and bin attribute for sysfs */
+ u64 eb_len, eb_offset;
+ struct bin_attribute attr_eb;
+
/*
* Only the first part of the SPA is used for the process element
* linked list. The only other part that software needs to worry about
@@ -561,6 +565,9 @@
u16 cxl_afu_cr_read16(struct cxl_afu *afu, int cr, u64 off);
u8 cxl_afu_cr_read8(struct cxl_afu *afu, int cr, u64 off);
+ssize_t cxl_afu_read_err_buffer(struct cxl_afu *afu, char *buf,
+ loff_t off, size_t count);
+
struct cxl_calls {
void (*cxl_slbia)(struct mm_struct *mm);