scsi: cxlflash: Support image reload policy modification

On a PERST, the AFU image can be reloaded or left intact. Provide means to set
this image reload policy.

Signed-off-by: Uma Krishnan <ukrishn@linux.vnet.ibm.com>
Acked-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/cxlflash/ocxl_hw.c b/drivers/scsi/cxlflash/ocxl_hw.c
index 21915b72610696a034727aab8c72839634982d39..f26bbb793f4ea786e8ae1765db97f6dafaa3f95f 100644 (file)
--- a/drivers/scsi/cxlflash/ocxl_hw.c
+++ b/drivers/scsi/cxlflash/ocxl_hw.c
@@ -251,6 +251,18 @@ out:
        return rc;
 }
 
+/**
+ * ocxlflash_perst_reloads_same_image() - sets the image reload policy
+ * @afu_cookie:        Hardware AFU associated with the host.
+ * @image:     Whether to load the same image on PERST.
+ */
+static void ocxlflash_perst_reloads_same_image(void *afu_cookie, bool image)
+{
+       struct ocxl_hw_afu *afu = afu_cookie;
+
+       afu->perst_same_image = image;
+}
+
 /**
  * ocxlflash_destroy_afu() - destroy the AFU structure
  * @afu_cookie:        AFU to be freed.
@@ -501,6 +513,7 @@ const struct cxlflash_backend_ops cxlflash_ocxl_ops = {
        .get_context            = ocxlflash_get_context,
        .dev_context_init       = ocxlflash_dev_context_init,
        .release_context        = ocxlflash_release_context,
+       .perst_reloads_same_image = ocxlflash_perst_reloads_same_image,
        .create_afu             = ocxlflash_create_afu,
        .destroy_afu            = ocxlflash_destroy_afu,
        .get_fd                 = ocxlflash_get_fd,

diff --git a/drivers/scsi/cxlflash/ocxl_hw.h b/drivers/scsi/cxlflash/ocxl_hw.h
index 55db0052a53ccf3434a1dd6a15b3f4e6a38386ed..b9638711451537cf26a89cba9dae69d53cb0a639 100644 (file)
--- a/drivers/scsi/cxlflash/ocxl_hw.h
+++ b/drivers/scsi/cxlflash/ocxl_hw.h
@@ -17,6 +17,7 @@ struct ocxl_hw_afu {
        struct ocxlflash_context *ocxl_ctx; /* Host context */
        struct pci_dev *pdev;           /* PCI device */
        struct device *dev;             /* Generic device */
+       bool perst_same_image;          /* Same image loaded on perst */
 
        struct ocxl_fn_config fcfg;     /* DVSEC config of the function */
        struct ocxl_afu_config acfg;    /* AFU configuration data */