Date: Sun, 6 Dec 2009 21:09:32 GMT From: Alexander Motin <mav@FreeBSD.org> To: Perforce Change Reviews <perforce@freebsd.org> Subject: PERFORCE change 171465 for review Message-ID: <200912062109.nB6L9WmV081909@repoman.freebsd.org>
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http://p4web.freebsd.org/chv.cgi?CH=171465 Change 171465 by mav@mav_mavtest on 2009/12/06 21:09:28 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. Affected files ... .. //depot/projects/scottl-camlock/src/sys/dev/ahci/ahci.c#89 edit Differences ... ==== //depot/projects/scottl-camlock/src/sys/dev/ahci/ahci.c#89 (text+ko) ==== @@ -1129,7 +1129,8 @@ 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 @@ /* 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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