[Accel-config] [PATCH v3 01/14] accel-config: Add mdev path to device context

[ramesh.thomas at intel.com]

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From: Ramesh Thomas <ramesh.thomas(a)intel.com>

/sys/class/mdev_bus/<bdf> is used often to access mdevs associated
with the device. Generate and store in device so it need not be
constructed everytime.

Signed-off-by: Ramesh Thomas <ramesh.thomas(a)intel.com>
---
 accfg/lib/libaccfg.c | 17 +++++++++++++++++
 accfg/lib/private.h  |  1 +
 2 files changed, 18 insertions(+)

diff --git a/accfg/lib/libaccfg.c b/accfg/lib/libaccfg.c
index 3b53be3..8b35602 100644
--- a/accfg/lib/libaccfg.c
+++ b/accfg/lib/libaccfg.c
@@ -194,6 +194,7 @@ static void free_device(struct accfg_device *device, struct list_head *head)
 		list_del_from(head, &device->list);
 	free(device->device_path);
 	free(device->device_buf);
+	free(device->mdev_path);
 	free(device);
 }
 
@@ -413,6 +414,7 @@ static void *add_device(void *parent, int id, const char *ctl_base, char *dev_pr
 	char *path;
 	int dfd;
 	int rc;
+	char *p;
 
 	path = calloc(1, strlen(ctl_base) + MAX_PARAM_LEN);
 	if (!path) {
@@ -470,6 +472,20 @@ static void *add_device(void *parent, int id, const char *ctl_base, char *dev_pr
 		goto err_dev_path;
 	}
 
+	device->mdev_path = strdup(device->device_path);
+	if (!device->mdev_path) {
+		err(ctx, "strdup of device_path failed\n");
+		goto err_dev_path;
+	}
+
+	if (asprintf(&p, "%s/%s", MDEV_BUS,
+			basename(dirname(device->mdev_path))) < 0) {
+		err(ctx, "device mdev_path allocation failed\n");
+		goto err_dev_path;
+	}
+	free(device->mdev_path);
+	device->mdev_path = p;
+
 	device->device_buf = calloc(1, strlen(device->device_path) +
 			MAX_PARAM_LEN);
 	if (!device->device_buf) {
@@ -490,6 +506,7 @@ static void *add_device(void *parent, int id, const char *ctl_base, char *dev_pr
 err_dev_path:
 err_read:
 	free(device->device_buf);
+	free(device->mdev_path);
 	free(device);
 err_device:
 	free(path);
diff --git a/accfg/lib/private.h b/accfg/lib/private.h
index f38ff23..365d484 100644
--- a/accfg/lib/private.h
+++ b/accfg/lib/private.h
@@ -30,6 +30,7 @@ struct accfg_device {
         struct list_node list;
 	int group_init;
         char *device_path;
+	char *mdev_path;
         char *device_buf;
 	char *device_type_str;
 	enum accfg_device_type type;
-- 
2.26.2