Merge branch '2023-10-10-blk-sandbox-support-binding-a-device-with-a-given-logical-block-size'

To quote the author:
At present on Sandbox when binding to a host backing file, the host
block device is created with a hard-coded 512 bytes block size.

Such assumption works for most cases, but for situation that with a raw
image file dump from a pre-formatted GPT partitioned disk image from a
4KiB block size device, when binding this file to a host device and mapping
this device to a blkmap, "blkmap" command like "blkmap part" won't work
correctly, due to block size mismatch during parsing the partition table.

This series updates Sandbox block driver, as well as the blkmap driver,
to get rid of the hard-coded 512 bytes block size assumption.

This series is available at u-boot-x86/blk for testing.

Test log (512 block size):

  => host bind 0 test.img
  => host info
  dev       blocks  blksz label           path
    0       262144    512 0               test.img
  => blkmap create 0
  Created "0"
  => blkmap map 0 0 40000 linear host 0 0
  Block 0x0+0x40000 mapped to block 0x0 of "host 0"
  => blkmap info
  Device 0: Vendor: U-Boot Rev: 1.0 Prod: blkmap
              Type: Hard Disk
              Capacity: 128.0 MB = 0.1 GB (262144 x 512)
  => blkmap part

  Partition Map for BLKMAP device 0  --   Partition Type: EFI

  Part    Start LBA       End LBA         Name
          Attributes
          Type GUID
          Partition GUID
    1     0x00000022      0x000000bd      "u-boot-spl"
          attrs:  0x0000000000000000
          type:   5b193300-fc78-40cd-8002-e86c45580b47
                  (5b193300-fc78-40cd-8002-e86c45580b47)
          guid:   0bb6bb6e-4aac-4c27-be03-016b01e7b941
    2     0x00000822      0x00000c84      "u-boot"
          attrs:  0x0000000000000000
          type:   2e54b353-1271-4842-806f-e436d6af6985
                  (2e54b353-1271-4842-806f-e436d6af6985)
          guid:   91d50814-8e31-4cc0-97dc-779e1dc59056
    3     0x00000c85      0x0000cc84      "rootfs"
          attrs:  0x0000000000000004
          type:   0fc63daf-8483-4772-8e79-3d69d8477de4
                  (linux)
          guid:   42799722-6e55-46e6-afa9-529e7af3f03b

Test log (4096 block size):

  => host bind 0 test.img 4096
  => host info
  dev       blocks  blksz label           path
    0        32768   4096 0               test.img
  => blkmap create 0
  Created "0"
  => blkmap map 0 0 8000 linear host 0 0
  Block 0x0+0x8000 mapped to block 0x0 of "host 0"
  => blkmap info
  Device 0: Vendor: U-Boot Rev: 1.0 Prod: blkmap
              Type: Hard Disk
              Capacity: 128.0 MB = 0.1 GB (32768 x 4096)
  => blkmap part

  Partition Map for BLKMAP device 0  --   Partition Type: EFI

  Part    Start LBA       End LBA         Name
          Attributes
          Type GUID
          Partition GUID
    1     0x00000100      0x00001fff      "primary"
          attrs:  0x0000000000000000
          type:   0fc63daf-8483-4772-8e79-3d69d8477de4
                  (linux)
          guid:   eba904d7-72c1-4dbd-bb4e-36be49cba5e3
    2     0x00002000      0x00007ffa      "primary"
          attrs:  0x0000000000000000
          type:   0fc63daf-8483-4772-8e79-3d69d8477de4
                  (linux)
          guid:   c48c360e-db47-46da-ab87-26416fad3cd3

1 files changed, 14 insertions, 26 deletions

diff --git a/include/blk.h b/include/blk.h
index 95e86e2d5d1..76bd5baf995 100644
--- a/include/blk.h
+++ b/include/blk.h
@@ -21,6 +21,8 @@ typedef ulong lbaint_t;
 #define LBAF "%" LBAFlength "x"
 #define LBAFU "%" LBAFlength "u"
 
+#define DEFAULT_BLKSZ		512
+
 struct udevice;
 
 static inline bool blk_enabled(void)
@@ -513,6 +515,18 @@ const char *blk_get_devtype(struct udevice *dev);
  */
 struct blk_desc *blk_get_by_device(struct udevice *dev);
 
+/**
+ * blk_get_desc() - Get the block device descriptor for the given device number
+ *
+ * @uclass_id:	Interface type
+ * @devnum:	Device number (0 = first)
+ * @descp:	Returns block device descriptor on success
+ * Return: 0 on success, -ENODEV if there is no such device and no device
+ * with a higher device number, -ENOENT if there is no such device but there
+ * is one with a higher number, or other -ve on other error.
+ */
+int blk_get_desc(enum uclass_id uclass_id, int devnum, struct blk_desc **descp);
+
 #else
 #include <errno.h>
 /*
@@ -716,32 +730,6 @@ int blk_print_device_num(enum uclass_id uclass_id, int devnum);
 int blk_print_part_devnum(enum uclass_id uclass_id, int devnum);
 
 /**
- * blk_read_devnum() - read blocks from a device
- *
- * @uclass_id:	Block device type
- * @devnum:	Device number
- * @start:	Start block number to read (0=first)
- * @blkcnt:	Number of blocks to read
- * @buffer:	Address to write data to
- * Return: number of blocks read, or -ve error number on error
- */
-ulong blk_read_devnum(enum uclass_id uclass_id, int devnum, lbaint_t start,
-		      lbaint_t blkcnt, void *buffer);
-
-/**
- * blk_write_devnum() - write blocks to a device
- *
- * @uclass_id:	Block device type
- * @devnum:	Device number
- * @start:	Start block number to write (0=first)
- * @blkcnt:	Number of blocks to write
- * @buffer:	Address to read data from
- * Return: number of blocks written, or -ve error number on error
- */
-ulong blk_write_devnum(enum uclass_id uclass_id, int devnum, lbaint_t start,
-		       lbaint_t blkcnt, const void *buffer);
-
-/**
  * blk_select_hwpart_devnum() - select a hardware partition
  *
  * This is similar to blk_dselect_hwpart() but it looks up the interface and