X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=drivers%2Fata%2Fahci.c;h=48616c6fee9d6c30d36f206b60b98707020e0cc8;hb=a718728f9e40ec79c0879ec6509a54fee214f5b2;hp=bd241767caeaddc54de27a87a21b55aaf97624a1;hpb=82490c0937cb455e7e4150455ff52e89a9fc5ab8;p=powerpc.git

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index bd241767ca..48616c6fee 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -75,6 +75,7 @@ enum {
 	AHCI_CMD_CLR_BUSY	= (1 << 10),
 
 	RX_FIS_D2H_REG		= 0x40,	/* offset of D2H Register FIS data */
+	RX_FIS_SDB		= 0x58, /* offset of SDB FIS data */
 	RX_FIS_UNK		= 0x60, /* offset of Unknown FIS data */
 
 	board_ahci		= 0,
@@ -202,6 +203,10 @@ struct ahci_port_priv {
 	dma_addr_t		cmd_tbl_dma;
 	void			*rx_fis;
 	dma_addr_t		rx_fis_dma;
+	/* for NCQ spurious interrupt analysis */
+	int			ncq_saw_spurious_sdb_cnt;
+	unsigned int		ncq_saw_d2h:1;
+	unsigned int		ncq_saw_dmas:1;
 };
 
 static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg);
@@ -586,35 +591,18 @@ static void ahci_power_down(void __iomem *port_mmio, u32 cap)
 {
 	u32 cmd, scontrol;
 
-	cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
-
-	if (cap & HOST_CAP_SSC) {
-		/* enable transitions to slumber mode */
-		scontrol = readl(port_mmio + PORT_SCR_CTL);
-		if ((scontrol & 0x0f00) > 0x100) {
-			scontrol &= ~0xf00;
-			writel(scontrol, port_mmio + PORT_SCR_CTL);
-		}
-
-		/* put device into slumber mode */
-		writel(cmd | PORT_CMD_ICC_SLUMBER, port_mmio + PORT_CMD);
-
-		/* wait for the transition to complete */
-		ata_wait_register(port_mmio + PORT_CMD, PORT_CMD_ICC_SLUMBER,
-				  PORT_CMD_ICC_SLUMBER, 1, 50);
-	}
+	if (!(cap & HOST_CAP_SSS))
+		return;
 
-	/* put device into listen mode */
-	if (cap & HOST_CAP_SSS) {
-		/* first set PxSCTL.DET to 0 */
-		scontrol = readl(port_mmio + PORT_SCR_CTL);
-		scontrol &= ~0xf;
-		writel(scontrol, port_mmio + PORT_SCR_CTL);
+	/* put device into listen mode, first set PxSCTL.DET to 0 */
+	scontrol = readl(port_mmio + PORT_SCR_CTL);
+	scontrol &= ~0xf;
+	writel(scontrol, port_mmio + PORT_SCR_CTL);
 
-		/* then set PxCMD.SUD to 0 */
-		cmd &= ~PORT_CMD_SPIN_UP;
-		writel(cmd, port_mmio + PORT_CMD);
-	}
+	/* then set PxCMD.SUD to 0 */
+	cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
+	cmd &= ~PORT_CMD_SPIN_UP;
+	writel(cmd, port_mmio + PORT_CMD);
 }
 
 static void ahci_init_port(void __iomem *port_mmio, u32 cap,
@@ -915,7 +903,7 @@ static int ahci_hardreset(struct ata_port *ap, unsigned int *class)
 
 	/* clear D2H reception area to properly wait for D2H FIS */
 	ata_tf_init(ap->device, &tf);
-	tf.command = 0xff;
+	tf.command = 0x80;
 	ata_tf_to_fis(&tf, d2h_fis, 0);
 
 	rc = sata_std_hardreset(ap, class);
@@ -1126,8 +1114,9 @@ static void ahci_host_intr(struct ata_port *ap)
 	void __iomem *mmio = ap->host->mmio_base;
 	void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
 	struct ata_eh_info *ehi = &ap->eh_info;
+	struct ahci_port_priv *pp = ap->private_data;
 	u32 status, qc_active;
-	int rc;
+	int rc, known_irq = 0;
 
 	status = readl(port_mmio + PORT_IRQ_STAT);
 	writel(status, port_mmio + PORT_IRQ_STAT);
@@ -1154,17 +1143,53 @@ static void ahci_host_intr(struct ata_port *ap)
 
 	/* hmmm... a spurious interupt */
 
-	/* some devices send D2H reg with I bit set during NCQ command phase */
-	if (ap->sactive && (status & PORT_IRQ_D2H_REG_FIS))
+	/* if !NCQ, ignore.  No modern ATA device has broken HSM
+	 * implementation for non-NCQ commands.
+	 */
+	if (!ap->sactive)
 		return;
 
-	/* ignore interim PIO setup fis interrupts */
-	if (ata_tag_valid(ap->active_tag) && (status & PORT_IRQ_PIOS_FIS))
-		return;
+	if (status & PORT_IRQ_D2H_REG_FIS) {
+		if (!pp->ncq_saw_d2h)
+			ata_port_printk(ap, KERN_INFO,
+				"D2H reg with I during NCQ, "
+				"this message won't be printed again\n");
+		pp->ncq_saw_d2h = 1;
+		known_irq = 1;
+	}
+
+	if (status & PORT_IRQ_DMAS_FIS) {
+		if (!pp->ncq_saw_dmas)
+			ata_port_printk(ap, KERN_INFO,
+				"DMAS FIS during NCQ, "
+				"this message won't be printed again\n");
+		pp->ncq_saw_dmas = 1;
+		known_irq = 1;
+	}
+
+	if (status & PORT_IRQ_SDB_FIS &&
+		   pp->ncq_saw_spurious_sdb_cnt < 10) {
+		/* SDB FIS containing spurious completions might be
+		 * dangerous, we need to know more about them.  Print
+		 * more of it.
+		 */
+		const u32 *f = pp->rx_fis + RX_FIS_SDB;
+
+		ata_port_printk(ap, KERN_INFO, "Spurious SDB FIS during NCQ "
+				"issue=0x%x SAct=0x%x FIS=%08x:%08x%s\n",
+				readl(port_mmio + PORT_CMD_ISSUE),
+				readl(port_mmio + PORT_SCR_ACT),
+				le32_to_cpu(f[0]), le32_to_cpu(f[1]),
+				pp->ncq_saw_spurious_sdb_cnt < 10 ?
+				"" : ", shutting up");
+
+		pp->ncq_saw_spurious_sdb_cnt++;
+		known_irq = 1;
+	}
 
-	if (ata_ratelimit())
+	if (!known_irq)
 		ata_port_printk(ap, KERN_INFO, "spurious interrupt "
-				"(irq_stat 0x%x active_tag %d sactive 0x%x)\n",
+				"(irq_stat 0x%x active_tag 0x%x sactive 0x%x)\n",
 				status, ap->active_tag, ap->sactive);
 }
 
@@ -1257,7 +1282,7 @@ static void ahci_thaw(struct ata_port *ap)
 	/* clear IRQ */
 	tmp = readl(port_mmio + PORT_IRQ_STAT);
 	writel(tmp, port_mmio + PORT_IRQ_STAT);
-	writel(1 << ap->id, mmio + HOST_IRQ_STAT);
+	writel(1 << ap->port_no, mmio + HOST_IRQ_STAT);
 
 	/* turn IRQ back on */
 	writel(DEF_PORT_IRQ, port_mmio + PORT_IRQ_MASK);