lkml.org 
[lkml]   [2018]   [Apr]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] soc: qcom: cmd-db: Make endian-agnostic
On Thu, Apr 12 2018 at 16:41 -0600, Stephen Boyd wrote:
>This driver deals with memory that is stored in little-endian format.
>Update the structures with the proper little-endian types and then
>do the proper conversions when reading the fields. Note that we compare
>the ids with a memcmp() because we already pad out the string 'id' field
>to exactly 8 bytes with the strncpy() onto the stack.
>
>Cc: Mahesh Sivasubramanian <msivasub@codeaurora.org>
>Cc: Lina Iyer <ilina@codeaurora.org>
>Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
>Cc: Evan Green <evgreen@chromium.org>
>Signed-off-by: Stephen Boyd <swboyd@chromium.org>
>---
>
>Changes from inline patch:
> * Fixed magic
> * Made function for memcmp()
> *
>
> drivers/soc/qcom/cmd-db.c | 116 +++++++++++++++++++++-----------------
> 1 file changed, 65 insertions(+), 51 deletions(-)
>
>@@ -99,8 +90,34 @@ struct cmd_db_header {
> * h/w accelerator and request a resource state.
> */
>
>+static const char CMD_DB_MAGIC[] = { 0xdb, 0x30, 0x03, 0x0c };
>+
This works now.

>+static bool cmd_db_magic_matches(struct cmd_db_header *header)
>+{
>+ __le32 *magic = &header->magic_num;
>+
>+ return memcmp(magic, CMD_DB_MAGIC, sizeof(CMD_DB_MAGIC)) == 0;
>+}
>+
> static struct cmd_db_header *cmd_db_header;
Could you move this up, along with other declarations?
>
>+
>+static inline void *rsc_to_entry_header(struct rsc_hdr *hdr)
>+{
>+ u16 offset = le16_to_cpu(hdr->header_offset);
>+
>+ return cmd_db_header->data + offset;

I noticed that the data was incorrect, with the above and I did it to
read the correct data.

return ((void*)cmd_db_header + sizeof(*cmd_db_header) + offset);
>+}
>+
>+static inline void *
>+rsc_offset(struct rsc_hdr *hdr, struct entry_header *ent)
>+{
>+ u16 offset = le16_to_cpu(hdr->header_offset);
>+ u16 loffset = le16_to_cpu(ent->offset);
>+
>+ return cmd_db_header->data + offset + loffset;
As well here -
return ((void*)cmd_db_header + sizeof(*cmd_db_header) + offset +
loffset);
>+}
>+

Thanks,
Lina

\
 
 \ /
  Last update: 2018-04-17 19:23    [W:0.044 / U:1.152 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site