scsi: cxlflash: Support adapter context discovery

Provide means to obtain the process element of an adapter context as well as
locate an adapter context by file.

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 49af059..21915b7 100644 (file)
--- a/drivers/scsi/cxlflash/ocxl_hw.c
+++ b/drivers/scsi/cxlflash/ocxl_hw.c
@@ -150,6 +150,19 @@ err1:
        goto out;
 }
 
+/**
+ * ocxlflash_process_element() - get process element of the adapter context
+ * @ctx_cookie:        Adapter context associated with the process element.
+ *
+ * Return: process element of the adapter context
+ */
+static int ocxlflash_process_element(void *ctx_cookie)
+{
+       struct ocxlflash_context *ctx = ctx_cookie;
+
+       return ctx->pe;
+}
+
 /**
  * ocxlflash_set_master() - sets the context as master
  * @ctx_cookie:        Adapter context to set as master.
@@ -469,9 +482,21 @@ err1:
        goto out;
 }
 
+/**
+ * ocxlflash_fops_get_context() - get the context associated with the file
+ * @file:      File associated with the adapter context.
+ *
+ * Return: pointer to the context
+ */
+static void *ocxlflash_fops_get_context(struct file *file)
+{
+       return file->private_data;
+}
+
 /* Backend ops to ocxlflash services */
 const struct cxlflash_backend_ops cxlflash_ocxl_ops = {
        .module                 = THIS_MODULE,
+       .process_element        = ocxlflash_process_element,
        .set_master             = ocxlflash_set_master,
        .get_context            = ocxlflash_get_context,
        .dev_context_init       = ocxlflash_dev_context_init,
@@ -479,4 +504,5 @@ const struct cxlflash_backend_ops cxlflash_ocxl_ops = {
        .create_afu             = ocxlflash_create_afu,
        .destroy_afu            = ocxlflash_destroy_afu,
        .get_fd                 = ocxlflash_get_fd,
+       .fops_get_context       = ocxlflash_fops_get_context,
 };