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update msc to be more robuse

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add more log, pass more complaint test
This commit is contained in:
hathach 2021-08-29 00:29:20 +07:00
parent 54013737d5
commit be98cd56c7
1 changed files with 65 additions and 22 deletions
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87
src/class/msc/msc_device.c
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@ -62,7 +62,7 @@ typedef struct
// Bulk Only Transfer (BOT) Protocol
uint8_t stage;
uint32_t total_len;
uint32_t total_len; // byte to be transferred, can be smaller than total_bytes in cbw
uint32_t xferred_len; // numbered of bytes transferred so far in the Data Stage
// Sense Response Data
@ -83,8 +83,16 @@ static void proc_read10_cmd(uint8_t rhport, mscd_interface_t* p_msc);
static void proc_write10_cmd(uint8_t rhport, mscd_interface_t* p_msc);
static void proc_write10_new_data(uint8_t rhport, mscd_interface_t* p_msc, uint32_t xferred_bytes);
TU_ATTR_ALWAYS_INLINE static inline bool is_data_in(uint8_t dir)
{
return tu_bit_test(dir, 7);
}
static inline bool send_csw(uint8_t rhport, mscd_interface_t* p_msc)
{
// Data residue is always = host expect - actual transferred
p_msc->csw.data_residue = p_msc->cbw.total_bytes - p_msc->xferred_len;
p_msc->stage = MSC_STAGE_STATUS_SENT;
return usbd_edpt_xfer(rhport, p_msc->ep_in , (uint8_t*) &p_msc->csw, sizeof(msc_csw_t));
}
@ -100,10 +108,9 @@ static void fail_scsi_op(uint8_t rhport, mscd_interface_t* p_msc, uint8_t status
msc_cbw_t const * p_cbw = &p_msc->cbw;
msc_csw_t * p_csw = &p_msc->csw;
p_csw->status = status;
p_csw->data_residue = p_cbw->total_bytes - p_msc->xferred_len;
p_msc->stage = MSC_STAGE_STATUS;
// data_residue will be calculated before sending out csw
p_csw->status = status;
p_msc->stage = MSC_STAGE_STATUS;
// failed but sense key is not set: default to Illegal Request
if ( p_msc->sense_key == 0 ) tud_msc_set_sense(p_cbw->lun, SCSI_SENSE_ILLEGAL_REQUEST, 0x20, 0x00);
@ -111,7 +118,7 @@ static void fail_scsi_op(uint8_t rhport, mscd_interface_t* p_msc, uint8_t status
// If there is data stage, stall it
if ( p_cbw->total_bytes )
{
if ( tu_bit_test(p_cbw->dir, 7) )
if ( is_data_in(p_cbw->dir) )
{
usbd_edpt_stall(rhport, p_msc->ep_in);
}else
@ -335,6 +342,8 @@ bool mscd_xfer_cb(uint8_t rhport, uint8_t ep_addr, xfer_result_t event, uint32_t
if ( !(xferred_bytes == sizeof(msc_cbw_t) && p_cbw->signature == MSC_CBW_SIGNATURE) )
{
TU_LOG(MSC_DEBUG, " SCSI CBW is not valid\r\n");
// BOT 6.6.1 If CBW is not valid stall both endpoints until reset recovery
p_msc->stage = MSC_STAGE_NEED_RESET;
@ -351,6 +360,7 @@ bool mscd_xfer_cb(uint8_t rhport, uint8_t ep_addr, xfer_result_t event, uint32_t
p_csw->signature = MSC_CSW_SIGNATURE;
p_csw->tag = p_cbw->tag;
p_csw->data_residue = 0;
p_csw->status = MSC_CSW_STATUS_PASSED;
/*------------- Parse command and prepare DATA -------------*/
p_msc->stage = MSC_STAGE_DATA;
@ -360,9 +370,10 @@ bool mscd_xfer_cb(uint8_t rhport, uint8_t ep_addr, xfer_result_t event, uint32_t
if ( SCSI_CMD_READ_10 == p_cbw->command[0] )
{
// Invalid CBW length == 0 or Direction bit is incorrect
// 6.7 The 13 Cases: case 2, case 3, case 10 -> phase error
if ( rdwr10_get_blocksize(p_cbw) == 0 || !tu_bit_test(p_cbw->dir, 7) )
// 6.7 The 13 Cases: case 2 (Hn < Di), case 3 (Hn < Do), case 10 (Ho <> Di) -> phase error
if ( rdwr10_get_blocksize(p_cbw) == 0 || !is_data_in(p_cbw->dir) )
{
TU_LOG(MSC_DEBUG, " SCSI ase 2 (Hn < Di), case 3 (Hn < Do), case 10 (Ho <> Di)\r\n");
fail_scsi_op(rhport, p_msc, MSC_CSW_STATUS_PHASE_ERROR);
}else
{
@ -372,9 +383,10 @@ bool mscd_xfer_cb(uint8_t rhport, uint8_t ep_addr, xfer_result_t event, uint32_t
else if (SCSI_CMD_WRITE_10 == p_cbw->command[0])
{
// Invalid CBW length == 0 or Direction bit is incorrect
// 6.7 The 13 Cases: case 2, case 3, case 8 -> phase error
if ( rdwr10_get_blocksize(p_cbw) == 0 || tu_bit_test(p_cbw->dir, 7) )
// 6.7 The 13 Cases: case 2 (Hn < Do), case 3 (Hn < Do), case 8 (Hi <> Do) -> phase error
if ( rdwr10_get_blocksize(p_cbw) == 0 || is_data_in(p_cbw->dir) )
{
TU_LOG(MSC_DEBUG, " SCSI ase 2 (Hn < Di), case 3 (Hn < Do), case 8 (Hi <> Do)\r\n");
fail_scsi_op(rhport, p_msc, MSC_CSW_STATUS_PHASE_ERROR);
}else
{
@ -386,9 +398,12 @@ bool mscd_xfer_cb(uint8_t rhport, uint8_t ep_addr, xfer_result_t event, uint32_t
// For other SCSI commands
// 1. OUT : queue transfer (invoke app callback after done)
// 2. IN & Zero: Process if is built-in, else Invoke app callback. Skip DATA if zero length
if ( (p_cbw->total_bytes > 0 ) && !tu_bit_test(p_cbw->dir, 7) )
if ( (p_cbw->total_bytes > 0 ) && !is_data_in(p_cbw->dir) )
{
// queue transfer
// Didn't check for case 9 (Ho > Dn), which requires examining scsi command first
// but it is OK to just receive data then responded with failed status
// Prepare for Data stage
TU_ASSERT( usbd_edpt_xfer(rhport, p_msc->ep_out, _mscd_buf, p_msc->total_len) );
}else
{
@ -404,20 +419,34 @@ bool mscd_xfer_cb(uint8_t rhport, uint8_t ep_addr, xfer_result_t event, uint32_t
if ( resplen < 0 )
{
// unsupported command
TU_LOG(MSC_DEBUG, " SCSI unsupported command\r\n");
fail_scsi_op(rhport, p_msc, MSC_CSW_STATUS_FAILED);
}
else if (resplen == 0)
{
if (p_cbw->total_bytes)
{
// 6.7 The 13 Cases: case 4 (Hi > Dn)
TU_LOG(MSC_DEBUG, " SCSI case 4 (Hi > Dn): %lu\r\n", p_cbw->total_bytes);
fail_scsi_op(rhport, p_msc, MSC_CSW_STATUS_FAILED);
}else
{
// case 1 Hn = Dn: all good
p_msc->stage = MSC_STAGE_STATUS;
}
}
else
{
p_msc->total_len = (uint32_t) resplen;
p_csw->status = MSC_CSW_STATUS_PASSED;
if (p_msc->total_len)
if ( p_cbw->total_bytes == 0 )
{
TU_ASSERT( p_cbw->total_bytes >= p_msc->total_len ); // cannot return more than host expect
TU_ASSERT( usbd_edpt_xfer(rhport, p_msc->ep_in, _mscd_buf, p_msc->total_len) );
// 6.7 The 13 Cases: case 2 (Hn < Di)
TU_LOG(MSC_DEBUG, " SCSI case 2 (Hn < Di): %lu\r\n", p_cbw->total_bytes);
fail_scsi_op(rhport, p_msc, MSC_CSW_STATUS_FAILED);
}else
{
p_msc->stage = MSC_STAGE_STATUS;
// cannot return more than host expect
p_msc->total_len = tu_min32((uint32_t) resplen, p_cbw->total_bytes);
TU_ASSERT( usbd_edpt_xfer(rhport, p_msc->ep_in, _mscd_buf, p_msc->total_len) );
}
}
}
@ -448,7 +477,7 @@ bool mscd_xfer_cb(uint8_t rhport, uint8_t ep_addr, xfer_result_t event, uint32_t
else
{
// OUT transfer, invoke callback if needed
if ( !tu_bit_test(p_cbw->dir, 7) )
if ( !is_data_in(p_cbw->dir) )
{
int32_t cb_result = tud_msc_scsi_cb(p_cbw->lun, p_cbw->command, _mscd_buf, p_msc->total_len);
@ -485,7 +514,7 @@ bool mscd_xfer_cb(uint8_t rhport, uint8_t ep_addr, xfer_result_t event, uint32_t
// Wait for the Status phase to complete
if( (ep_addr == p_msc->ep_in) && (xferred_bytes == sizeof(msc_csw_t)) )
{
TU_LOG(MSC_DEBUG, " SCSI Status: %u\r\n", p_csw->status);
TU_LOG(MSC_DEBUG, " SCSI Status = %u\r\n", p_csw->status);
// TU_LOG_MEM(MSC_DEBUG, p_csw, xferred_bytes, 2);
// Invoke complete callback if defined
@ -507,6 +536,10 @@ bool mscd_xfer_cb(uint8_t rhport, uint8_t ep_addr, xfer_result_t event, uint32_t
}
TU_ASSERT( prepare_cbw(rhport, p_msc) );
}else
{
// Any xfer ended here is consider unknown error, ignore it
TU_LOG1(" Warning expect SCSI Status but received unknown data\r\n");
}
break;
@ -518,7 +551,15 @@ bool mscd_xfer_cb(uint8_t rhport, uint8_t ep_addr, xfer_result_t event, uint32_t
// skip status if epin is currently stalled, will do it when received Clear Stall request
if ( !usbd_edpt_stalled(rhport, p_msc->ep_in) )
{
TU_ASSERT( send_csw(rhport, p_msc) );
if ( (p_cbw->total_bytes > p_msc->xferred_len) && is_data_in(p_cbw->dir) )
{
// 6.7 The 13 Cases: case 5 (Hi > Di): STALL before status
TU_LOG(MSC_DEBUG, " SCSI case 5 (Hi > Di): %lu > %lu\r\n", p_cbw->total_bytes, p_msc->xferred_len);
usbd_edpt_stall(rhport, p_msc->ep_in);
}else
{
TU_ASSERT( send_csw(rhport, p_msc) );
}
}
}
@ -725,6 +766,7 @@ static void proc_read10_cmd(uint8_t rhport, mscd_interface_t* p_msc)
if ( nbytes < 0 )
{
// negative means error -> endpoint is stalled & status in CSW set to failed
TU_LOG(MSC_DEBUG, " tud_msc_read10_cb() return -1\r\n");
// Sense = Flash not ready for access
tud_msc_set_sense(p_cbw->lun, SCSI_SENSE_MEDIUM_ERROR, 0x33, 0x00);
@ -785,6 +827,7 @@ static void proc_write10_new_data(uint8_t rhport, mscd_interface_t* p_msc, uint3
if ( nbytes < 0 )
{
// negative means error -> failed this scsi op
TU_LOG(MSC_DEBUG, " tud_msc_write10_cb() return -1\r\n");
// Sense = Flash not ready for access
tud_msc_set_sense(p_cbw->lun, SCSI_SENSE_MEDIUM_ERROR, 0x33, 0x00);