diff options
| author | Simon Glass | 2022-09-21 16:21:45 +0200 |
|---|---|---|
| committer | Simon Glass | 2022-09-25 13:59:38 -0600 |
| commit | 02cea1145a5ad49e400bd100b907ad763db16863 (patch) | |
| tree | c4c0bec672b962e0c0bd787b0dc38011066aa77b /include/scsi_emul.h | |
| parent | 5eff9d9c36e9e2b2437743d989f25376b981700a (diff) | |
sandbox: scsi: Move request-handling code to scsi_emul
Move this code into the emulator file so it can be used by multiple
drivers.
Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'include/scsi_emul.h')
| -rw-r--r-- | include/scsi_emul.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/include/scsi_emul.h b/include/scsi_emul.h index 3c52398e3ff..13c3f860b40 100644 --- a/include/scsi_emul.h +++ b/include/scsi_emul.h @@ -19,6 +19,7 @@ * @product: Product name * @block_size: Block size of device in bytes (normally 512) * @file_size: Size of the backing file for this emulator, in bytes + * @seek_block: Seek position for file (block number) * * @phase: Current SCSI phase * @buff_used: Number of bytes ready to transfer back to host @@ -34,13 +35,36 @@ struct scsi_emul_info { const char *product; int block_size; loff_t file_size; + int seek_block; /* state maintained by the emulator: */ enum scsi_cmd_phase phase; int buff_used; int read_len; + uint seek_pos; int alloc_len; uint transfer_len; }; +/* Indicates that a read is being started */ +#define SCSI_EMUL_DO_READ 1 + +/** + * sb_scsi_emul_command() - Process a SCSI command + * + * This sets up the response in info->buff and updates various other values + * in info. + * + * If SCSI_EMUL_DO_READ is returned then the caller should set up so that the + * backing file can be read, or return an error status if there is no file. + * + * @info: Emulation information + * @req: Request to process + * @len: Length of request in bytes + * @return SCSI_EMUL_DO_READ if a read has started, 0 if some other operation + * has started, -ve if there was an error + */ +int sb_scsi_emul_command(struct scsi_emul_info *info, + const struct scsi_cmd *req, int len); + #endif |