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authorDaniel Axtens <dja@axtens.net>2015-08-14 17:41:25 +1000
committerMichael Ellerman <mpe@ellerman.id.au>2015-08-14 21:32:07 +1000
commit13e68d8bd05c998cae452a4f3400af1e8edd852e (patch)
treed17ff97c9f46a663b5cb4916fc333703b2cdfea4 /drivers/misc/cxl/api.c
parent4e1efb403c1c016ae831bd9988a7d2e5e0af41a0 (diff)
downloadlinux-stericsson-13e68d8bd05c998cae452a4f3400af1e8edd852e.tar.gz
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 <dja@axtens.net> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'drivers/misc/cxl/api.c')
-rw-r--r--drivers/misc/cxl/api.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/misc/cxl/api.c b/drivers/misc/cxl/api.c
index 729e0851167d..6a768a9ad22f 100644
--- a/drivers/misc/cxl/api.c
+++ b/drivers/misc/cxl/api.c
@@ -327,3 +327,10 @@ int cxl_afu_reset(struct cxl_context *ctx)
return cxl_afu_check_and_enable(afu);
}
EXPORT_SYMBOL_GPL(cxl_afu_reset);
+
+void cxl_perst_reloads_same_image(struct cxl_afu *afu,
+ bool perst_reloads_same_image)
+{
+ afu->adapter->perst_same_image = perst_reloads_same_image;
+}
+EXPORT_SYMBOL_GPL(cxl_perst_reloads_same_image);