Hi quanfan,
Thanks for the patch. I had something similar in mind.
On 11/5/21 1:46 AM, qianfangui...@qq.com wrote:
From: qianfan Zhao <qianfangui...@163.com>
CHUNK_TYPE_RAW buffer is not aligned, and flash sparse images by
fastboot will report "Misaligned operation" if DCACHE is enabled.
Flashing Sparse Image
CACHE: Misaligned operation at range [84000028, 84001028]
CACHE: Misaligned operation at range [84001034, 84002034]
CACHE: Misaligned operation at range [8401104c, 8401304c]
Fix it
Signed-off-by: qianfan Zhao <qianfangui...@163.com>
---
lib/image-sparse.c | 46 +++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 45 insertions(+), 1 deletion(-)
diff --git a/lib/image-sparse.c b/lib/image-sparse.c
index d80fdbbf58..1c621cd685 100644
--- a/lib/image-sparse.c
+++ b/lib/image-sparse.c
@@ -49,6 +49,48 @@
static void default_log(const char *ignored, char *response) {}
+static lbaint_t write_sparse_chunk_raw(struct sparse_storage *info,
+ lbaint_t blk, lbaint_t blkcnt,
+ void *data,
+ char *response)
+{
+#if !CONFIG_IS_ENABLED(SYS_DCACHE_OFF)
Please rewrite this like
if (CONFIG_IS_ENABLED(SYS_DCACHE_OFF)
return info->write(info, blk, blkcnt, data);
+ lbaint_t n, blks = 0, aligned_buf_blks = 100;
Can we try allocating info->blksz * blkcnt up front?
+ uint32_t *aligned_buf = NULL;
+
+ while (blkcnt > 0) {
+ aligned_buf = (uint32_t *)
+ memalign(ARCH_DMA_MINALIGN,
+ ROUNDUP(
+ info->blksz * aligned_buf_blks,
+ ARCH_DMA_MINALIGN));
I don't think we need this ROUNDUP. info->blksz is the block size of the
underlying storage, which is at least 512. And void pointers don't need
to be casted.
+ if (!aligned_buf) {
+ info->mssg("Malloc failed for: CHUNK_TYPE_RAW",
+ response);
+ return -1;
return -ENOMEM;
Yes, the rest of the function returns -1, but there is no reason to
perpetuate that.
+ }
+
+ n = min(aligned_buf_blks, blkcnt);
+ memcpy(aligned_buf, data, n * info->blksz);
+
+ if (info->write(info, blk + blks, n, aligned_buf) != n) {
+ free(aligned_buf);
Can we reuse the buffer instead of allocating/freeing it every loop?
+ return n + blks;
+ }
+
+ free(aligned_buf);
+
+ data += n * info->blksz;
+ blkcnt -= n;
+ blks += n;
+ }
+
+ return blks;
+#else
+ return info->write(info, blk, blkcnt, data);
+#endif
+}
+
int write_sparse_image(struct sparse_storage *info,
const char *part_name, void *data, char *response)
{
@@ -152,7 +194,9 @@ int write_sparse_image(struct sparse_storage *info,
return -1;
}
- blks = info->write(info, blk, blkcnt, data);
+ blks = write_sparse_chunk_raw(info, blk, blkcnt,
+ data, response);
+
/* blks might be > blkcnt (eg. NAND bad-blocks) */
if (blks < blkcnt) {
printf("%s: %s" LBAFU " [" LBAFU "]\n",
You also need to fix the error handling here. Otherwise you will get
tuings like "Write failed, block #4294967295" on out of memory.
