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msc_device: add async IO support.

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Signed-off-by: HiFiPhile <admin@hifiphile.com>
This commit is contained in:
HiFiPhile
2025-01-29 15:16:02 +01:00
parent d1ee2bf18f
commit cc626f35d2
2 changed files with 146 additions and 52 deletions
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16
src/class/msc/msc_device.h
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@@ -48,6 +48,11 @@
#error CFG_TUD_MSC_EP_BUFSIZE must be defined, value of a block size should work well, the more the better
#endif
// Enable asynchronous read/write, once operation is finished tud_msc_async_io_done() must be called
#ifndef CFG_TUD_MSC_ASYNC_IO
#define CFG_TUD_MSC_ASYNC_IO 0
#endif
TU_VERIFY_STATIC(CFG_TUD_MSC_EP_BUFSIZE < UINT16_MAX, "Size is not correct");
//--------------------------------------------------------------------+
@@ -73,6 +78,9 @@ bool tud_msc_set_sense(uint8_t lun, uint8_t sense_key, uint8_t add_sense_code, u
//
// - read < 0 : Indicate application error e.g invalid address. This request will be STALLed
// and return failed status in command status wrapper phase.
//
// - In case of asynchronous IO enabled, application should passing reading parameters to background IO
// task and return immediately. Once reading is done, tud_msc_async_io_done() must be called.
int32_t tud_msc_read10_cb (uint8_t lun, uint32_t lba, uint32_t offset, void* buffer, uint32_t bufsize);
// Invoked when received SCSI WRITE10 command
@@ -88,6 +96,8 @@ int32_t tud_msc_read10_cb (uint8_t lun, uint32_t lba, uint32_t offset, void* buf
// - write < 0 : Indicate application error e.g invalid address. This request will be STALLed
// and return failed status in command status wrapper phase.
//
// - In case of asynchronous IO enabled, application should passing writing parameters to background IO
// task and return immediately. Once writing is done, tud_msc_async_io_done() must be called.
// TODO change buffer to const uint8_t*
int32_t tud_msc_write10_cb (uint8_t lun, uint32_t lba, uint32_t offset, uint8_t* buffer, uint32_t bufsize);
@@ -121,6 +131,12 @@ void tud_msc_capacity_cb(uint8_t lun, uint32_t* block_count, uint16_t* block_siz
*/
int32_t tud_msc_scsi_cb (uint8_t lun, uint8_t const scsi_cmd[16], void* buffer, uint16_t bufsize);
#if CFG_TUD_MSC_ASYNC_IO
// Called once asynchronous read/write operation is done
// bytes_processed has the same meaning of tud_msc_read10_cb() /
// tud_msc_write10_cb() return value
void tud_msc_async_io_done(int32_t bytes_processed);
#endif
/*------------- Optional callbacks -------------*/
// Invoked when received GET_MAX_LUN request, required for multiple LUNs implementation