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authorRafał Miłecki <rafal@milecki.pl>2021-03-08 10:03:18 +0100
committerThomas Bogendoerfer <tsbogend@alpha.franken.de>2021-03-12 15:53:07 +0100
commit298923cf999cecd2ef06df126f85a3d68da8c4d8 (patch)
treef4b45783597c1366375614f62daf8fb7b88a9a91 /drivers/firmware/broadcom
parent0a24b51a3264a3f942a75025ea5ff6133c8989b0 (diff)
firmware: bcm47xx_nvram: extract code copying NVRAM
This simplifies function finding NVRAM. It doesn't directly deal with NVRAM structure anymore and is a bit smaller. Signed-off-by: Rafał Miłecki <rafal@milecki.pl> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Diffstat (limited to 'drivers/firmware/broadcom')
-rw-r--r--drivers/firmware/broadcom/bcm47xx_nvram.c43
1 files changed, 25 insertions, 18 deletions
diff --git a/drivers/firmware/broadcom/bcm47xx_nvram.c b/drivers/firmware/broadcom/bcm47xx_nvram.c
index 99f3ec180be6..09f51b95849e 100644
--- a/drivers/firmware/broadcom/bcm47xx_nvram.c
+++ b/drivers/firmware/broadcom/bcm47xx_nvram.c
@@ -55,11 +55,34 @@ static u32 find_nvram_size(void __iomem *end)
}
/**
+ * bcm47xx_nvram_copy - copy NVRAM to internal buffer
+ */
+static void bcm47xx_nvram_copy(void __iomem *nvram_start, size_t res_size)
+{
+ struct nvram_header __iomem *header = nvram_start;
+ size_t copy_size;
+
+ copy_size = header->len;
+ if (copy_size > res_size) {
+ pr_err("The nvram size according to the header seems to be bigger than the partition on flash\n");
+ copy_size = res_size;
+ }
+ if (copy_size >= NVRAM_SPACE) {
+ pr_err("nvram on flash (%zu bytes) is bigger than the reserved space in memory, will just copy the first %i bytes\n",
+ copy_size, NVRAM_SPACE - 1);
+ copy_size = NVRAM_SPACE - 1;
+ }
+
+ __ioread32_copy(nvram_buf, nvram_start, DIV_ROUND_UP(copy_size, 4));
+ nvram_buf[NVRAM_SPACE - 1] = '\0';
+ nvram_len = copy_size;
+}
+
+/**
* bcm47xx_nvram_find_and_copy - find NVRAM on flash mapping & copy it
*/
static int bcm47xx_nvram_find_and_copy(void __iomem *flash_start, size_t res_size)
{
- struct nvram_header __iomem *header;
size_t flash_size;
size_t offset;
u32 size;
@@ -95,23 +118,7 @@ static int bcm47xx_nvram_find_and_copy(void __iomem *flash_start, size_t res_siz
return -ENXIO;
found:
- header = (struct nvram_header *)(flash_start + offset);
- __ioread32_copy(nvram_buf, header, sizeof(*header) / 4);
- nvram_len = ((struct nvram_header *)(nvram_buf))->len;
- size = res_size - offset;
- if (nvram_len > size) {
- pr_err("The nvram size according to the header seems to be bigger than the partition on flash\n");
- nvram_len = size;
- }
- if (nvram_len >= NVRAM_SPACE) {
- pr_err("nvram on flash (%zu bytes) is bigger than the reserved space in memory, will just copy the first %i bytes\n",
- nvram_len, NVRAM_SPACE - 1);
- nvram_len = NVRAM_SPACE - 1;
- }
- /* proceed reading data after header */
- __ioread32_copy(nvram_buf + sizeof(*header), header + 1,
- DIV_ROUND_UP(nvram_len, 4));
- nvram_buf[NVRAM_SPACE - 1] = '\0';
+ bcm47xx_nvram_copy(flash_start + offset, res_size - offset);
return 0;
}