3 files changed, 31 insertions, 3 deletions

diff --git a/sys/dev/ahci/ahci.c b/sys/dev/ahci/ahci.c
index afa4b99c8120f..df4f66abf5167 100644
--- a/sys/dev/ahci/ahci.c
+++ b/sys/dev/ahci/ahci.c
@@ -291,6 +291,9 @@ static struct {
 #define RECOVERY_REQUEST_SENSE	2
 #define recovery_slot		spriv_field1
 
+static int force_ahci = 1;
+TUNABLE_INT("hw.ahci.force", &force_ahci);
+
 static int
 ahci_probe(device_t dev)
 {
@@ -308,7 +311,8 @@ ahci_probe(device_t dev)
 	for (i = 0; ahci_ids[i].id != 0; i++) {
 		if (ahci_ids[i].id == devid &&
 		    ahci_ids[i].rev <= revid &&
-		    (valid || !(ahci_ids[i].quirks & AHCI_Q_NOFORCE))) {
+		    (valid || (force_ahci == 1 &&
+		     !(ahci_ids[i].quirks & AHCI_Q_NOFORCE)))) {
 			/* Do not attach JMicrons with single PCI function. */
 			if (pci_get_vendor(dev) == 0x197b &&
 			    (pci_read_config(dev, 0xdf, 1) & 0x40) == 0)
diff --git a/sys/dev/ata/chipsets/ata-ati.c b/sys/dev/ata/chipsets/ata-ati.c
index 1dfd84b81f48d..ada70d7c6aa5f 100644
--- a/sys/dev/ata/chipsets/ata-ati.c
+++ b/sys/dev/ata/chipsets/ata-ati.c
@@ -53,6 +53,7 @@ __FBSDID("$FreeBSD$");
 
 /* local prototypes */
 static int ata_ati_chipinit(device_t dev);
+static int ata_ati_dumb_ch_attach(device_t dev);
 static int ata_ati_ixp700_ch_attach(device_t dev);
 static int ata_ati_setmode(device_t dev, int target, int mode);
 
@@ -63,6 +64,8 @@ static int ata_ati_setmode(device_t dev, int target, int mode);
 #define SII_MEMIO       1
 #define SII_BUG         0x04
 
+static int force_ahci = 1;
+TUNABLE_INT("hw.ahci.force", &force_ahci);
 
 /*
  * ATI chipset support functions
@@ -111,7 +114,10 @@ ata_ati_probe(device_t dev)
 	ctlr->chipinit = ata_sii_chipinit;
 	break;
     case ATI_AHCI:
-	ctlr->chipinit = ata_ahci_chipinit;
+	if (force_ahci == 1 || pci_get_subclass(dev) != PCIS_STORAGE_IDE)
+		ctlr->chipinit = ata_ahci_chipinit;
+	else
+		ctlr->chipinit = ata_ati_chipinit;
 	break;
     }
     return (BUS_PROBE_DEFAULT);
@@ -127,6 +133,11 @@ ata_ati_chipinit(device_t dev)
     if (ata_setup_interrupt(dev, ata_generic_intr))
 	return ENXIO;
 
+    if (ctlr->chip->cfg1 == ATI_AHCI) {
+	ctlr->ch_attach = ata_ati_dumb_ch_attach;
+	ctlr->setmode = ata_sata_setmode;
+	return (0);
+    }
     switch (ctlr->chip->chipid) {
     case ATA_ATI_IXP600:
 	/* IXP600 only has 1 PATA channel */
@@ -165,6 +176,17 @@ ata_ati_chipinit(device_t dev)
 }
 
 static int
+ata_ati_dumb_ch_attach(device_t dev)
+{
+	struct ata_channel *ch = device_get_softc(dev);
+
+	if (ata_pci_ch_attach(dev))
+		return ENXIO;
+	ch->flags |= ATA_SATA;
+	return (0);
+}
+
+static int
 ata_ati_ixp700_ch_attach(device_t dev)
 {
 	struct ata_pci_controller *ctlr = device_get_softc(device_get_parent(dev));
diff --git a/sys/dev/ata/chipsets/ata-nvidia.c b/sys/dev/ata/chipsets/ata-nvidia.c
index 2edc0f1471df1..580dfca7b9285 100644
--- a/sys/dev/ata/chipsets/ata-nvidia.c
+++ b/sys/dev/ata/chipsets/ata-nvidia.c
@@ -65,6 +65,8 @@ static int ata_nvidia_setmode(device_t dev, int target, int mode);
 #define NVAHCI          0x04
 #define NVNOFORCE       0x08
 
+static int force_ahci = 1;
+TUNABLE_INT("hw.ahci.force", &force_ahci);
 
 /*
  * nVidia chipset support functions
@@ -181,7 +183,7 @@ ata_nvidia_probe(device_t dev)
 
     ata_set_desc(dev);
     if ((ctlr->chip->cfg1 & NVAHCI) &&
-	((ctlr->chip->cfg1 & NVNOFORCE) == 0 ||
+	((force_ahci == 1 && (ctlr->chip->cfg1 & NVNOFORCE) == 0) ||
 	 pci_get_subclass(dev) != PCIS_STORAGE_IDE))
 	ctlr->chipinit = ata_ahci_chipinit;
     else