X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=lib%2Fefi_loader%2Fefi_device_path.c;h=98c36e798f5f40fcda0ddba63bd9f93dbbdc5e7c;hb=da206916a14fc8ab8962763c47673128a29b4b9c;hp=9d776a6d99fa33f0ad48021588df079400a2c44e;hpb=d1e15041abf3ccd38169ae7aa8736f78200f8ee3;p=platform%2Fkernel%2Fu-boot.git

diff --git a/lib/efi_loader/efi_device_path.c b/lib/efi_loader/efi_device_path.c
index 9d776a6..98c36e7 100644
--- a/lib/efi_loader/efi_device_path.c
+++ b/lib/efi_loader/efi_device_path.c
@@ -22,10 +22,6 @@ static const struct efi_device_path END = {
 	.length   = sizeof(END),
 };
 
-#define U_BOOT_GUID \
-	EFI_GUID(0xe61d73b9, 0xa384, 0x4acc, \
-		 0xae, 0xab, 0x82, 0xe8, 0x28, 0xf3, 0x62, 0x8b)
-
 /* template ROOT node: */
 static const struct efi_device_path_vendor ROOT = {
 	.dp = {
@@ -86,7 +82,7 @@ struct efi_device_path *efi_dp_next(const struct efi_device_path *dp)
 
 /*
  * Compare two device-paths, stopping when the shorter of the two hits
- * an End* node.  This is useful to, for example, compare a device-path
+ * an End* node. This is useful to, for example, compare a device-path
  * representing a device with one representing a file on the device, or
  * a device with a parent device.
  */
@@ -113,16 +109,17 @@ int efi_dp_match(const struct efi_device_path *a,
 }
 
 /*
- * See UEFI spec (section 3.1.2, about short-form device-paths..
- * tl;dr: we can have a device-path that starts with a USB WWID
- * or USB Class node, and a few other cases which don't encode
- * the full device path with bus hierarchy:
+ * We can have device paths that start with a USB WWID or a USB Class node,
+ * and a few other cases which don't encode the full device path with bus
+ * hierarchy:
  *
  *   - MESSAGING:USB_WWID
  *   - MESSAGING:USB_CLASS
  *   - MEDIA:FILE_PATH
  *   - MEDIA:HARD_DRIVE
  *   - MESSAGING:URI
+ *
+ * See UEFI spec (section 3.1.2, about short-form device-paths)
  */
 static struct efi_device_path *shorten_path(struct efi_device_path *dp)
 {
@@ -154,7 +151,7 @@ static struct efi_object *find_obj(struct efi_device_path *dp, bool short_path,
 		struct efi_device_path *obj_dp;
 		efi_status_t ret;
 
-		ret = efi_search_protocol(efiobj->handle,
+		ret = efi_search_protocol(efiobj,
 					  &efi_guid_device_path, &handler);
 		if (ret != EFI_SUCCESS)
 			continue;
@@ -386,7 +383,6 @@ struct efi_device_path *efi_dp_get_next_instance(struct efi_device_path **dp,
 		*size = 0;
 	if (!dp || !*dp)
 		return NULL;
-	p = *dp;
 	sz = efi_dp_instance_size(*dp);
 	p = dp_alloc(sz + sizeof(END));
 	if (!p)
@@ -649,7 +645,7 @@ static unsigned dp_part_size(struct blk_desc *desc, int part)
 /*
  * Create a device node for a block device partition.
  *
- * @buf		buffer to which the device path is wirtten
+ * @buf		buffer to which the device path is written
  * @desc	block device descriptor
  * @part	partition number, 0 identifies a block device
  */
@@ -714,7 +710,7 @@ static void *dp_part_node(void *buf, struct blk_desc *desc, int part)
 /*
  * Create a device path for a block device or one of its partitions.
  *
- * @buf		buffer to which the device path is wirtten
+ * @buf		buffer to which the device path is written
  * @desc	block device descriptor
  * @part	partition number, 0 identifies a block device
  */
@@ -733,7 +729,7 @@ static void *dp_part_fill(void *buf, struct blk_desc *desc, int part)
 	/*
 	 * We *could* make a more accurate path, by looking at if_type
 	 * and handling all the different cases like we do for non-
-	 * legacy (ie CONFIG_BLK=y) case.  But most important thing
+	 * legacy (i.e. CONFIG_BLK=y) case. But most important thing
 	 * is just to have a unique device-path for if_type+devnum.
 	 * So map things to a fictitious USB device.
 	 */
@@ -757,7 +753,7 @@ static void *dp_part_fill(void *buf, struct blk_desc *desc, int part)
 	return dp_part_node(buf, desc, part);
 }
 
-/* Construct a device-path from a partition on a blk device: */
+/* Construct a device-path from a partition on a block device: */
 struct efi_device_path *efi_dp_from_part(struct blk_desc *desc, int part)
 {
 	void *buf, *start;
@@ -776,7 +772,7 @@ struct efi_device_path *efi_dp_from_part(struct blk_desc *desc, int part)
 /*
  * Create a device node for a block device partition.
  *
- * @buf		buffer to which the device path is wirtten
+ * @buf		buffer to which the device path is written
  * @desc	block device descriptor
  * @part	partition number, 0 identifies a block device
  */
@@ -796,7 +792,7 @@ struct efi_device_path *efi_dp_part_node(struct blk_desc *desc, int part)
 	return buf;
 }
 
-/* convert path to an UEFI style path (ie. DOS style backslashes and utf16) */
+/* convert path to an UEFI style path (i.e. DOS style backslashes and UTF-16) */
 static void path_to_uefi(u16 *uefi, const char *path)
 {
 	while (*path) {
@@ -914,9 +910,17 @@ struct efi_device_path *efi_dp_from_mem(uint32_t memory_type,
 	return start;
 }
 
-/*
- * Helper to split a full device path (containing both device and file
- * parts) into it's constituent parts.
+/**
+ * efi_dp_split_file_path() - split of relative file path from device path
+ *
+ * Given a device path indicating a file on a device, separate the device
+ * path in two: the device path of the actual device and the file path
+ * relative to this device.
+ *
+ * @full_path:		device path including device and file path
+ * @device_path:	path of the device
+ * @file_path:		relative path of the file
+ * Return:		status code
  */
 efi_status_t efi_dp_split_file_path(struct efi_device_path *full_path,
 				    struct efi_device_path **device_path,
@@ -933,7 +937,7 @@ efi_status_t efi_dp_split_file_path(struct efi_device_path *full_path,
 	while (!EFI_DP_TYPE(p, MEDIA_DEVICE, FILE_PATH)) {
 		p = efi_dp_next(p);
 		if (!p)
-			return EFI_OUT_OF_RESOURCES;
+			return EFI_INVALID_PARAMETER;
 	}
 	fp = efi_dp_dup(p);
 	if (!fp)
@@ -946,3 +950,53 @@ efi_status_t efi_dp_split_file_path(struct efi_device_path *full_path,
 	*file_path = fp;
 	return EFI_SUCCESS;
 }
+
+efi_status_t efi_dp_from_name(const char *dev, const char *devnr,
+			      const char *path,
+			      struct efi_device_path **device,
+			      struct efi_device_path **file)
+{
+	int is_net;
+	struct blk_desc *desc = NULL;
+	disk_partition_t fs_partition;
+	int part = 0;
+	char filename[32] = { 0 }; /* dp->str is u16[32] long */
+	char *s;
+
+	if (path && !file)
+		return EFI_INVALID_PARAMETER;
+
+	is_net = !strcmp(dev, "Net");
+	if (!is_net) {
+		part = blk_get_device_part_str(dev, devnr, &desc, &fs_partition,
+					       1);
+		if (part < 0)
+			return EFI_INVALID_PARAMETER;
+
+		if (device)
+			*device = efi_dp_from_part(desc, part);
+	} else {
+#ifdef CONFIG_NET
+		if (device)
+			*device = efi_dp_from_eth();
+#endif
+	}
+
+	if (!path)
+		return EFI_SUCCESS;
+
+	if (!is_net) {
+		/* Add leading / to fs paths, because they're absolute */
+		snprintf(filename, sizeof(filename), "/%s", path);
+	} else {
+		snprintf(filename, sizeof(filename), "%s", path);
+	}
+	/* DOS style file path: */
+	s = filename;
+	while ((s = strchr(s, '/')))
+		*s++ = '\\';
+	*file = efi_dp_from_file(((!is_net && device) ? desc : NULL),
+				 part, filename);
+
+	return EFI_SUCCESS;
+}