diff options
| author | Zhen Kong <zkong@codeaurora.org> | 2015-12-02 23:40:16 -0800 |
|---|---|---|
| committer | David Keitel <dkeitel@codeaurora.org> | 2016-03-23 21:13:51 -0700 |
| commit | deb62ed21a20b42e2b98daa14850ef95428bef1f (patch) | |
| tree | 838c6a45b7beeb36db5e005ad8d24768528eb993 /include/uapi | |
| parent | 894269ca16bc63052973b17198dde1bf4fc58373 (diff) | |
qseecom: make change to support sg list entry number larger than 512
qseecom_send_modfd_cmd_64 converts non-contiguous ION memory fd to
scatter-gather physical address list, and supports up to 512 SG list
entries. Now, 512 is not enough if client wants to send large data
in a fragmented system. In this change, if SG list entry number is
larger than 512, we will allocate a new contiguous kernel buffer,
then save all SG entries into this new buffer.
Change-Id: Id90eefb98b63bf16db755dae8e1482e448090f47
Signed-off-by: Zhen Kong <zkong@codeaurora.org>
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/linux/qseecom.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/uapi/linux/qseecom.h b/include/uapi/linux/qseecom.h index 4bdd7035bbf0..5c5761d690dd 100644 --- a/include/uapi/linux/qseecom.h +++ b/include/uapi/linux/qseecom.h @@ -233,6 +233,24 @@ struct qseecom_sg_entry_64bit { uint32_t len; } __attribute__ ((packed)); +/* + * sg list buf format version + * 1: Legacy format to support only 512 SG list entries + * 2: new format to support > 512 entries + */ +#define QSEECOM_SG_LIST_BUF_FORMAT_VERSION_1 1 +#define QSEECOM_SG_LIST_BUF_FORMAT_VERSION_2 2 + +struct qseecom_sg_list_buf_hdr_64bit { + struct qseecom_sg_entry_64bit blank_entry; /* must be all 0 */ + uint32_t version; /* sg list buf format version */ + uint64_t new_buf_phys_addr; /* PA of new buffer */ + uint32_t nents_total; /* Total number of SG entries */ +} __attribute__ ((packed)); + +#define QSEECOM_SG_LIST_BUF_HDR_SZ_64BIT \ + sizeof(struct qseecom_sg_list_buf_hdr_64bit) + #define MAX_CE_PIPE_PAIR_PER_UNIT 3 #define INVALID_CE_INFO_UNIT_NUM 0xffffffff |