[PATCH 10/46] sata_mv: replace DPRINTK with 'pci_dump' module parameter

[Hannes Reinecke <hare@suse.de>]

From: Hannes Reinecke <hare@suse.com>

Implement module parameter 'pci_dump' and move the DPRINTK calls
over to dev_printk().

Signed-off-by: Hannes Reinecke <hare@suse.de>
---
 drivers/ata/sata_mv.c | 71 +++++++++++++++++++++++++++------------------------
 1 file changed, 38 insertions(+), 33 deletions(-)

diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index d7228f8e9297..9e570d455acc 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -83,6 +83,10 @@ module_param(irq_coalescing_usecs, int, S_IRUGO);
 MODULE_PARM_DESC(irq_coalescing_usecs,
 		 "IRQ coalescing time threshold in usecs");
 
+static int pci_dump;
+module_param(pci_dump, int, S_IRUGO);
+MODULE_PARM_DESC(pci_dump, "Enable dumping of PCI registers on error");
+
 enum {
 	/* BAR's are enumerated in terms of pci_resource_start() terms */
 	MV_PRIMARY_BAR		= 0,	/* offset 0x10: memory space */
@@ -1245,47 +1249,49 @@ static int mv_stop_edma(struct ata_port *ap)
 	return err;
 }
 
-#ifdef ATA_DEBUG
-static void mv_dump_mem(void __iomem *start, unsigned bytes)
+static void mv_dump_mem(struct device *dev, void __iomem *start, unsigned bytes)
 {
-	int b, w;
+	int b, w, o;
+	unsigned char linebuf[38];
+
 	for (b = 0; b < bytes; ) {
-		DPRINTK("%p: ", start + b);
-		for (w = 0; b < bytes && w < 4; w++) {
-			printk("%08x ", readl(start + b));
+		for (w = 0, o = 0; b < bytes && w < 4; w++) {
+			o += snprintf(linebuf + o, 38 - o,
+				      "%08x ", readl(start + b));
 			b += sizeof(u32);
 		}
-		printk("\n");
+		dev_printk(KERN_DEBUG, dev, "%p: %s\n", start + b, linebuf);
 	}
 }
-#endif
-#if defined(ATA_DEBUG) || defined(CONFIG_PCI)
+#if defined(CONFIG_PCI)
 static void mv_dump_pci_cfg(struct pci_dev *pdev, unsigned bytes)
 {
-#ifdef ATA_DEBUG
-	int b, w;
+	int b, w, o;
 	u32 dw;
+	unsigned char linebuf[38];
+
 	for (b = 0; b < bytes; ) {
-		DPRINTK("%02x: ", b);
-		for (w = 0; b < bytes && w < 4; w++) {
+		for (w = 0, o = 0; b < bytes && w < 4; w++) {
 			(void) pci_read_config_dword(pdev, b, &dw);
-			printk("%08x ", dw);
+			o += snprintf(linebuf + o, 38 - o,
+				      "%08x ", dw);
 			b += sizeof(u32);
 		}
-		printk("\n");
+		dev_printk(KERN_DEBUG, &pdev->dev, "%02x: %s\n", b, linebuf);
 	}
-#endif
 }
 #endif
 static void mv_dump_all_regs(void __iomem *mmio_base, int port,
 			     struct pci_dev *pdev)
 {
-#ifdef ATA_DEBUG
 	void __iomem *hc_base = mv_hc_base(mmio_base,
 					   port >> MV_PORT_HC_SHIFT);
 	void __iomem *port_base;
 	int start_port, num_ports, p, start_hc, num_hcs, hc;
 
+	if (!pci_dump)
+		return;
+	dev_printk(KERN_DEBUG, &pdev->dev, "All regs @ PCI error\n");
 	if (0 > port) {
 		start_hc = start_port = 0;
 		num_ports = 8;		/* shld be benign for 4 port devs */
@@ -1295,31 +1301,31 @@ static void mv_dump_all_regs(void __iomem *mmio_base, int port,
 		start_port = port;
 		num_ports = num_hcs = 1;
 	}
-	DPRINTK("All registers for port(s) %u-%u:\n", start_port,
-		num_ports > 1 ? num_ports - 1 : start_port);
+	dev_printk(KERN_DEBUG, &pdev->dev,
+		   "All registers for port(s) %u-%u:\n", start_port,
+		   num_ports > 1 ? num_ports - 1 : start_port);
 
 	if (NULL != pdev) {
-		DPRINTK("PCI config space regs:\n");
+		dev_printk(KERN_DEBUG, &pdev->dev, "PCI config space regs:\n");
 		mv_dump_pci_cfg(pdev, 0x68);
 	}
-	DPRINTK("PCI regs:\n");
-	mv_dump_mem(mmio_base+0xc00, 0x3c);
-	mv_dump_mem(mmio_base+0xd00, 0x34);
-	mv_dump_mem(mmio_base+0xf00, 0x4);
-	mv_dump_mem(mmio_base+0x1d00, 0x6c);
+	dev_printk(KERN_DEBUG, &pdev->dev, "PCI regs:\n");
+	mv_dump_mem(&pdev->dev, mmio_base+0xc00, 0x3c);
+	mv_dump_mem(&pdev->dev, mmio_base+0xd00, 0x34);
+	mv_dump_mem(&pdev->dev, mmio_base+0xf00, 0x4);
+	mv_dump_mem(&pdev->dev, mmio_base+0x1d00, 0x6c);
 	for (hc = start_hc; hc < start_hc + num_hcs; hc++) {
 		hc_base = mv_hc_base(mmio_base, hc);
-		DPRINTK("HC regs (HC %i):\n", hc);
-		mv_dump_mem(hc_base, 0x1c);
+		dev_printk(KERN_DEBUG, &pdev->dev, "HC regs (HC %i):\n", hc);
+		mv_dump_mem(&pdev->dev, hc_base, 0x1c);
 	}
 	for (p = start_port; p < start_port + num_ports; p++) {
 		port_base = mv_port_base(mmio_base, p);
-		DPRINTK("EDMA regs (port %i):\n", p);
-		mv_dump_mem(port_base, 0x54);
-		DPRINTK("SATA regs (port %i):\n", p);
-		mv_dump_mem(port_base+0x300, 0x60);
+		dev_printk(KERN_DEBUG, &pdev->dev, "EDMA regs (port %i):\n", p);
+		mv_dump_mem(&pdev->dev, port_base, 0x54);
+		dev_printk(KERN_DEBUG, &pdev->dev, "SATA regs (port %i):\n", p);
+		mv_dump_mem(&pdev->dev, port_base+0x300, 0x60);
 	}
-#endif
 }
 
 static unsigned int mv_scr_offset(unsigned int sc_reg_in)
@@ -2958,7 +2964,6 @@ static int mv_pci_error(struct ata_host *host, void __iomem *mmio)
 
 	dev_err(host->dev, "PCI ERROR; PCI IRQ cause=0x%08x\n", err_cause);
 
-	DPRINTK("All regs @ PCI error\n");
 	mv_dump_all_regs(mmio, -1, to_pci_dev(host->dev));
 
 	writelfl(0, mmio + hpriv->irq_cause_offset);
-- 
2.16.4