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ahci: Fix SDB FIS Construction

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The SDB FIS creation was mangled;
We were writing the error byte to byte 0,
and omitting the SDB FIS magic byte.

Though the SDB packet layout states that:
byte 0: Must be 0xA1 to indicate SDB FIS.
byte 1: Port multiplier select & other flags
byte 2: status byte.
byte 3: error byte.

This patch adds an SDB FIS structure with
human-readable names, and ensures that we
are filling the structure appropriately.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Tested-by: Michael S. Tsirkin <mst@redhat.com>
Message-id: 1412204151-18117-7-git-send-email-jsnow@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
John Snow 2014-10-01 18:55:51 -04:00 committed by Stefan Hajnoczi
parent 659142ecf7
commit 54a7f8f38d
2 changed files with 17 additions and 9 deletions
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18
hw/ide/ahci.c
View file

@ -570,24 +570,24 @@ static void ahci_write_fis_sdb(AHCIState *s, int port, uint32_t finished)
AHCIDevice *ad = &s->dev[port];
AHCIPortRegs *pr = &ad->port_regs;
IDEState *ide_state;
uint8_t *sdb_fis;
SDBFIS *sdb_fis;
if (!s->dev[port].res_fis ||
!(pr->cmd & PORT_CMD_FIS_RX)) {
return;
}
sdb_fis = &ad->res_fis[RES_FIS_SDBFIS];
sdb_fis = (SDBFIS *)&ad->res_fis[RES_FIS_SDBFIS];
ide_state = &ad->port.ifs[0];
/* clear memory */
*(uint32_t*)sdb_fis = 0;
/* write values */
sdb_fis[0] = ide_state->error;
sdb_fis[2] = ide_state->status & 0x77;
sdb_fis->type = 0xA1;
/* Interrupt pending & Notification bit */
sdb_fis->flags = (ad->hba->control_regs.irqstatus ? (1 << 6) : 0);
sdb_fis->status = ide_state->status & 0x77;
sdb_fis->error = ide_state->error;
/* update SAct field in SDB_FIS */
s->dev[port].finished |= finished;
*(uint32_t*)(sdb_fis + 4) = cpu_to_le32(ad->finished);
sdb_fis->payload = cpu_to_le32(ad->finished);
/* Update shadow registers (except BSY 0x80 and DRQ 0x08) */
pr->tfdata = (ad->port.ifs[0].error << 8) |

8
hw/ide/ahci.h
View file

@ -327,6 +327,14 @@ typedef struct NCQFrame {
uint8_t reserved10;
} QEMU_PACKED NCQFrame;
typedef struct SDBFIS {
uint8_t type;
uint8_t flags;
uint8_t status;
uint8_t error;
uint32_t payload;
} QEMU_PACKED SDBFIS;
void ahci_init(AHCIState *s, DeviceState *qdev, AddressSpace *as, int ports);
void ahci_uninit(AHCIState *s);