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scsi_hd: some fixes and improvements.

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This commit is contained in:
Maxim Poliakovski 2022-10-27 14:19:58 +02:00
parent a58c9b1a62
commit 46a0e82258
1 changed files with 63 additions and 50 deletions
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113
devices/common/scsi/scsi_hd.cpp
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@ -30,6 +30,7 @@ along with this program. If not, see <https://www.gnu.org/licenses/>.
#include <fstream>
#include <limits>
#include <cstring>
#include <stdio.h>
#define sector_size 512
@ -66,47 +67,59 @@ void ScsiHardDisk::process_command() {
uint8_t* cmd = this->cmd_buf;
switch (cmd[0]) {
case ScsiCommand::TEST_UNIT_READY:
test_unit_ready();
case ScsiCommand::REWIND:
rewind();
case ScsiCommand::REQ_SENSE:
alloc_len = cmd[4];
req_sense(alloc_len);
case ScsiCommand::INQUIRY:
alloc_len = (cmd[3] << 8) + cmd[4];
inquiry(alloc_len);
case ScsiCommand::READ_6:
lba = ((cmd[1] & 0x1F) << 16) + (cmd[2] << 8) + cmd[3];
transfer_len = cmd[4];
read(lba, transfer_len, 6);
case ScsiCommand::READ_10:
lba = (cmd[2] << 24) + (cmd[3] << 16) + (cmd[4] << 8) + cmd[5];
transfer_len = (cmd[7] << 8) + cmd[8];
read(lba, transfer_len, 10);
case ScsiCommand::WRITE_6:
lba = ((cmd[1] & 0x1F) << 16) + (cmd[2] << 8) + cmd[3];
transfer_len = cmd[4];
write(lba, transfer_len, 6);
case ScsiCommand::WRITE_10:
lba = (cmd[2] << 24) + (cmd[3] << 16) + (cmd[4] << 8) + cmd[5];
transfer_len = (cmd[7] << 8) + cmd[8];
write(lba, transfer_len, 10);
case ScsiCommand::SEEK_6:
lba = ((cmd[1] & 0x1F) << 16) + (cmd[2] << 8) + cmd[3];
seek(lba);
case ScsiCommand::MODE_SELECT_6:
param_len = cmd[4];
mode_select_6(param_len);
case ScsiCommand::MODE_SENSE_6:
page_code = cmd[2] & 0x1F;
subpage_code = cmd[3];
alloc_len = cmd[4];
mode_sense_6(page_code, subpage_code, alloc_len);
case ScsiCommand::READ_CAPAC_10:
read_capacity_10();
default:
LOG_F(WARNING, "Unrecognized SCSI command: %x", cmd[0]);
case ScsiCommand::TEST_UNIT_READY:
test_unit_ready();
break;
case ScsiCommand::REWIND:
rewind();
break;
case ScsiCommand::REQ_SENSE:
alloc_len = cmd[4];
req_sense(alloc_len);
break;
case ScsiCommand::INQUIRY:
alloc_len = (cmd[3] << 8) + cmd[4];
inquiry(alloc_len);
break;
case ScsiCommand::READ_6:
lba = ((cmd[1] & 0x1F) << 16) + (cmd[2] << 8) + cmd[3];
transfer_len = cmd[4];
read(lba, transfer_len, 6);
break;
case ScsiCommand::READ_10:
lba = (cmd[2] << 24) + (cmd[3] << 16) + (cmd[4] << 8) + cmd[5];
transfer_len = (cmd[7] << 8) + cmd[8];
read(lba, transfer_len, 10);
break;
case ScsiCommand::WRITE_6:
lba = ((cmd[1] & 0x1F) << 16) + (cmd[2] << 8) + cmd[3];
transfer_len = cmd[4];
write(lba, transfer_len, 6);
break;
case ScsiCommand::WRITE_10:
lba = (cmd[2] << 24) + (cmd[3] << 16) + (cmd[4] << 8) + cmd[5];
transfer_len = (cmd[7] << 8) + cmd[8];
write(lba, transfer_len, 10);
break;
case ScsiCommand::SEEK_6:
lba = ((cmd[1] & 0x1F) << 16) + (cmd[2] << 8) + cmd[3];
seek(lba);
break;
case ScsiCommand::MODE_SELECT_6:
param_len = cmd[4];
mode_select_6(param_len);
break;
case ScsiCommand::MODE_SENSE_6:
page_code = cmd[2] & 0x1F;
subpage_code = cmd[3];
alloc_len = cmd[4];
mode_sense_6(page_code, subpage_code, alloc_len);
break;
case ScsiCommand::READ_CAPAC_10:
read_capacity_10();
break;
default:
LOG_F(WARNING, "SCSI_HD: unrecognized command: %x", cmd[0]);
}
}
@ -128,15 +141,15 @@ int ScsiHardDisk::req_sense(uint16_t alloc_len) {
void ScsiHardDisk::inquiry(uint16_t alloc_len) {
if (alloc_len >= 48) {
uint8_t empty_filler[1 << 17] = {0x0};
memcpy(img_buffer, empty_filler, (1 << 17));
std::memcpy(img_buffer, empty_filler, (1 << 17));
img_buffer[2] = 0x1;
img_buffer[3] = 0x2;
img_buffer[4] = 0x31;
img_buffer[7] = 0x1C;
memcpy(img_buffer + 8, vendor_info, 8);
memcpy(img_buffer + 16, prod_info, 16);
memcpy(img_buffer + 32, rev_info, 8);
memcpy(img_buffer + 40, serial_info, 8);
std::memcpy(img_buffer + 8, vendor_info, 8);
std::memcpy(img_buffer + 16, prod_info, 16);
std::memcpy(img_buffer + 32, rev_info, 8);
std::memcpy(img_buffer + 40, serial_info, 8);
}
else {
LOG_F(WARNING, "Inappropriate Allocation Length: %d", alloc_len);
@ -163,8 +176,8 @@ void ScsiHardDisk::mode_sense_6(uint8_t page_code, uint8_t subpage_code, uint8_t
void ScsiHardDisk::read_capacity_10() {
uint32_t sec_limit = (this->img_size >> 9);
uint8_t empty_filler[1 << 17] = {0x0};
memcpy(img_buffer, empty_filler, (1 << 17));
std::memset(img_buffer, 0, sizeof(img_buffer));
img_buffer[0] = (sec_limit >> 24) & 0xFF;
img_buffer[1] = (sec_limit >> 16) & 0xFF;
@ -179,10 +192,10 @@ void ScsiHardDisk::format() {
}
void ScsiHardDisk::read(uint32_t lba, uint16_t transfer_len, uint8_t cmd_len) {
uint8_t empty_filler[1 << 17] = {0x0};
memcpy(img_buffer, empty_filler, (1 << 17));
uint32_t transfer_size = transfer_len;
std::memset(img_buffer, 0, sizeof(img_buffer));
if (cmd_len == 6)
transfer_size = (transfer_len == 0) ? 256 : transfer_len;