Is there any way to read PMP registers after hardreset/softreset?
SATA Controller is marvell 88SX7042 and driver is sata_mv.
I try to send 0xE4 and 0xE6 command to read/write PMP registers:
struct sg_io_hdr io_hdr;
unsigned char cdb[SG_ATA_16_LEN];
unsigned char sb[32];
unsigned char data[4096];
memset(&io_hdr, 0, sizeof(io_hdr));
memset(&cdb, 0, sizeof(cdb));
memset(&sb, 0, sizeof(sb));
memset(&data, 0, sizeof(data));
cdb[0] = SG_ATA_16;
cdb[1] = SG_ATA_PROTO_NON_DATA;
cdb[2] = SG_CDB2_CHECK_COND;
cdb[4] = (unsigned char)reg;
cdb[13] = 0xF;
cdb[14] = 0xe8;
io_hdr.interface_id = 'S';
io_hdr.mx_sb_len = sizeof(sb);
io_hdr.dxfer_direction = SG_DXFER_NONE;
io_hdr.dxfer_len = 0;
io_hdr.dxferp = NULL;
io_hdr.cmdp = cdb;
io_hdr.cmd_len = SG_ATA_16_LEN;
io_hdr.sbp = sb;
io_hdr.pack_id = 0;
io_hdr.timeout = 16000;
if (ioctl(fd, SG_IO, &io_hdr) == -1) {
perror("ioctl(fd, SG_IO)");
return -1;
}
But after 'ioctl', the SATA link fails to read SCR1 and start resetting:
ata1.00: failed to read SCR 1 (Emask=0x40)
ata1.01: failed to read SCR 1 (Emask=0x40)
ata1.02: failed to read SCR 1 (Emask=0x40)
ata1.03: failed to read SCR 1 (Emask=0x40)
ata1.00: exception Emask 0x100 SAct 0x0 SErr 0x0 action 0x6 frozen
ata1.01: exception Emask 0x100 SAct 0x0 SErr 0x0 action 0x6 frozen
ata1.01: cmd e8/00:00:00:00:00/00:00:00:00:00/0f tag 0
res 58/00:00:00:00:00/00:00:00:00:00/0f Emask 0x2 (HSM violation)
ata1.01: status: { DRDY DRQ }
ata1.02: exception Emask 0x100 SAct 0x0 SErr 0x0 action 0x6 frozen
ata1.03: exception Emask 0x100 SAct 0x0 SErr 0x0 action 0x6 frozen
ata1.15: hard resetting link
Is there any suggestion?
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