fastboot: sparse: implement reserve()
In order to process the CHUNK_TYPE_DONT_CARE properly, there is
a requirement to be able to 'reserve' a specified number of blocks
in the storage media. Because of the special handling of "bad blocks"
in NAND devices, this is implemented in a storage abstraction function.
Signed-off-by: Steve Rae <srae@broadcom.com>
Reviewed-by: Maxime Ripard <maxime.ripard@free-electrons.com>
diff --git a/common/fb_nand.c b/common/fb_nand.c
index 77ca55d..c8c79e9 100644
--- a/common/fb_nand.c
+++ b/common/fb_nand.c
@@ -126,6 +126,25 @@
return written / info->blksz;
}
+static lbaint_t fb_nand_sparse_reserve(struct sparse_storage *info,
+ lbaint_t blk, lbaint_t blkcnt)
+{
+ int bad_blocks = 0;
+
+/*
+ * TODO - implement a function to determine the total number
+ * of blocks which must be used in order to reserve the specified
+ * number ("blkcnt") of "good-blocks", starting at "blk"...
+ * ( possibly something like the "check_skip_len()" function )
+ */
+
+ /*
+ * the return value must be 'blkcnt' ("good-blocks") plus the
+ * number of "bad-blocks" encountered within this space...
+ */
+ return blkcnt + bad_blocks;
+}
+
void fb_nand_flash_write(const char *cmd, void *download_buffer,
unsigned int download_bytes)
{
@@ -155,6 +174,7 @@
sparse.start = part->offset / sparse.blksz;
sparse.size = part->size / sparse.blksz;
sparse.write = fb_nand_sparse_write;
+ sparse.reserve = fb_nand_sparse_reserve;
printf("Flashing sparse image at offset " LBAFU "\n",
sparse.start);