From: Tejun Heo <htejun@gmail.com>
Date: Mon, 15 May 2006 11:58:27 +0000 (+0900)
Subject: [PATCH] sata_sil: convert to new EH
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=f6aae27ed002ba9c0a98aff811dbde32ce749d28;p=openwrt%2Fstaging%2Fblogic.git

[PATCH] sata_sil: convert to new EH

Convert sata_sil to new EH.  As these controllers have hardware
interrupt mask and are known to have screaming interrupts issues, use
hardware IRQ masking for freezing.  sil_freeze() masks interrupts for
the port and sil_thaw() unmasks them.  As ports are automatically
frozen before probing reset, there is no need to initialize interrupt
masks sil_init_onde().  Remove related code.

Other than freezing, sata_sil uses stock BMDMA EH routines.

Signed-off-by: Tejun Heo <htejun@gmail.com>
---

diff --git a/drivers/scsi/sata_sil.c b/drivers/scsi/sata_sil.c
index bfcece18a7cb..aa63044eed2e 100644
--- a/drivers/scsi/sata_sil.c
+++ b/drivers/scsi/sata_sil.c
@@ -96,6 +96,8 @@ static void sil_dev_config(struct ata_port *ap, struct ata_device *dev);
 static u32 sil_scr_read (struct ata_port *ap, unsigned int sc_reg);
 static void sil_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
 static void sil_post_set_mode (struct ata_port *ap);
+static void sil_freeze(struct ata_port *ap);
+static void sil_thaw(struct ata_port *ap);
 
 
 static const struct pci_device_id sil_pci_tbl[] = {
@@ -174,7 +176,10 @@ static const struct ata_port_operations sil_ops = {
 	.bmdma_status		= ata_bmdma_status,
 	.qc_prep		= ata_qc_prep,
 	.qc_issue		= ata_qc_issue_prot,
-	.eng_timeout		= ata_eng_timeout,
+	.freeze			= sil_freeze,
+	.thaw			= sil_thaw,
+	.error_handler		= ata_bmdma_error_handler,
+	.post_internal_cmd	= ata_bmdma_post_internal_cmd,
 	.irq_handler		= ata_interrupt,
 	.irq_clear		= ata_bmdma_irq_clear,
 	.scr_read		= sil_scr_read,
@@ -314,6 +319,33 @@ static void sil_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
 		writel(val, mmio);
 }
 
+static void sil_freeze(struct ata_port *ap)
+{
+	void __iomem *mmio_base = ap->host_set->mmio_base;
+	u32 tmp;
+
+	/* plug IRQ */
+	tmp = readl(mmio_base + SIL_SYSCFG);
+	tmp |= SIL_MASK_IDE0_INT << ap->port_no;
+	writel(tmp, mmio_base + SIL_SYSCFG);
+	readl(mmio_base + SIL_SYSCFG);	/* flush */
+}
+
+static void sil_thaw(struct ata_port *ap)
+{
+	void __iomem *mmio_base = ap->host_set->mmio_base;
+	u32 tmp;
+
+	/* clear IRQ */
+	ata_chk_status(ap);
+	ata_bmdma_irq_clear(ap);
+
+	/* turn on IRQ */
+	tmp = readl(mmio_base + SIL_SYSCFG);
+	tmp &= ~(SIL_MASK_IDE0_INT << ap->port_no);
+	writel(tmp, mmio_base + SIL_SYSCFG);
+}
+
 /**
  *	sil_dev_config - Apply device/host-specific errata fixups
  *	@ap: Port containing device to be examined
@@ -384,7 +416,7 @@ static int sil_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
 	int rc;
 	unsigned int i;
 	int pci_dev_busy = 0;
-	u32 tmp, irq_mask;
+	u32 tmp;
 	u8 cls;
 
 	if (!printed_version++)
@@ -474,24 +506,11 @@ static int sil_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
 	}
 
 	if (ent->driver_data == sil_3114) {
-		irq_mask = SIL_MASK_4PORT;
-
 		/* flip the magic "make 4 ports work" bit */
 		tmp = readl(mmio_base + sil_port[2].bmdma);
 		if ((tmp & SIL_INTR_STEERING) == 0)
 			writel(tmp | SIL_INTR_STEERING,
 			       mmio_base + sil_port[2].bmdma);
-
-	} else {
-		irq_mask = SIL_MASK_2PORT;
-	}
-
-	/* make sure IDE0/1/2/3 interrupts are not masked */
-	tmp = readl(mmio_base + SIL_SYSCFG);
-	if (tmp & irq_mask) {
-		tmp &= ~irq_mask;
-		writel(tmp, mmio_base + SIL_SYSCFG);
-		readl(mmio_base + SIL_SYSCFG);	/* flush */
 	}
 
 	/* mask all SATA phy-related interrupts */