[PATCH v2 14/38] cxlflash: Support adapter context discovery

Uma Krishnan
2018-02-26T22:22:06Z

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>
---
drivers/scsi/cxlflash/ocxl_hw.c | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)

diff --git a/drivers/scsi/cxlflash/ocxl_hw.c b/drivers/scsi/cxlflash/ocxl_hw.c
index 59e9003..cdb1385 100644
--- a/drivers/scsi/cxlflash/ocxl_hw.c
+++ b/drivers/scsi/cxlflash/ocxl_hw.c
@@ -151,6 +151,19 @@ static struct file *ocxlflash_getfile(struct device *dev, const char *name,
}

/**
+ * 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.
*/
@@ -461,9 +474,21 @@ static struct file *ocxlflash_get_fd(void *ctx_cookie,
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,
@@ -471,4 +496,5 @@ 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,
};
--
2.1.0