svn commit: r200196 - head/sys/dev/ahci
Alexander Motin
mav at FreeBSD.org
Sun Dec 6 23:56:54 UTC 2009
Author: mav
Date: Sun Dec 6 23:56:54 2009
New Revision: 200196
URL: http://svn.freebsd.org/changeset/base/200196
Log:
Add Asynchronous Notification support for controllers without SNTF
capability by snooping SDB FIS receive area. It should be even faster
then regular way, but less reliable.
Modified:
head/sys/dev/ahci/ahci.c
Modified: head/sys/dev/ahci/ahci.c
==============================================================================
--- head/sys/dev/ahci/ahci.c Sun Dec 6 23:51:27 2009 (r200195)
+++ head/sys/dev/ahci/ahci.c Sun Dec 6 23:56:54 2009 (r200196)
@@ -1129,7 +1129,8 @@ ahci_notify_events(device_t dev, u_int32
struct cam_path *dpath;
int i;
- ATA_OUTL(ch->r_mem, AHCI_P_SNTF, status);
+ if (ch->caps & AHCI_CAP_SSNTF)
+ ATA_OUTL(ch->r_mem, AHCI_P_SNTF, status);
if (bootverbose)
device_printf(dev, "SNTF 0x%04x\n", status);
for (i = 0; i < 16; i++) {
@@ -1188,8 +1189,16 @@ ahci_ch_intr(void *data)
/* Read command statuses. */
sstatus = ATA_INL(ch->r_mem, AHCI_P_SACT);
cstatus = ATA_INL(ch->r_mem, AHCI_P_CI);
- if ((istatus & AHCI_P_IX_SDB) && (ch->caps & AHCI_CAP_SSNTF))
- sntf = ATA_INL(ch->r_mem, AHCI_P_SNTF);
+ if (istatus & AHCI_P_IX_SDB) {
+ if (ch->caps & AHCI_CAP_SSNTF)
+ sntf = ATA_INL(ch->r_mem, AHCI_P_SNTF);
+ else {
+ u_int8_t *fis = ch->dma.rfis + 0x58;
+
+ if (fis[1] & 0x80)
+ sntf = (1 << (fis[1] & 0x0f));
+ }
+ }
/* Process PHY events */
if (istatus & (AHCI_P_IX_PC | AHCI_P_IX_PRC | AHCI_P_IX_OF |
AHCI_P_IX_IF | AHCI_P_IX_HBD | AHCI_P_IX_HBF | AHCI_P_IX_TFE)) {
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