diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index d07bf0366d99ee06cc3d4b3df62d617e5ef7cc15..79a1e9dd56d98abfc68155d46df733acbb3ee8e0 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -103,8 +103,6 @@ static struct ata_port_operations ahci_p5wdh_ops = {
.hardreset = ahci_p5wdh_hardreset,
};
-#define AHCI_HFLAGS(flags) .private_data = (void *)(flags)
-
static const struct ata_port_info ahci_port_info[] = {
/* by features */
[board_ahci] =
@@ -261,6 +259,14 @@ static const struct pci_device_id ahci_pci_tbl[] = {
{ PCI_VDEVICE(INTEL, 0x1e06), board_ahci }, /* Panther Point RAID */
{ PCI_VDEVICE(INTEL, 0x1e07), board_ahci }, /* Panther Point RAID */
{ PCI_VDEVICE(INTEL, 0x1e0e), board_ahci }, /* Panther Point RAID */
+ { PCI_VDEVICE(INTEL, 0x8c02), board_ahci }, /* Lynx Point AHCI */
+ { PCI_VDEVICE(INTEL, 0x8c03), board_ahci }, /* Lynx Point AHCI */
+ { PCI_VDEVICE(INTEL, 0x8c04), board_ahci }, /* Lynx Point RAID */
+ { PCI_VDEVICE(INTEL, 0x8c05), board_ahci }, /* Lynx Point RAID */
+ { PCI_VDEVICE(INTEL, 0x8c06), board_ahci }, /* Lynx Point RAID */
+ { PCI_VDEVICE(INTEL, 0x8c07), board_ahci }, /* Lynx Point RAID */
+ { PCI_VDEVICE(INTEL, 0x8c0e), board_ahci }, /* Lynx Point RAID */
+ { PCI_VDEVICE(INTEL, 0x8c0f), board_ahci }, /* Lynx Point RAID */
/* JMicron 360/1/3/5/6, match class to avoid IDE function */
{ PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
diff --git a/drivers/ata/ahci.h b/drivers/ata/ahci.h
index b1750007c8dc5603b23259c12d0b1b5639d07d48..c2594ddf25b00f54d22b51c66f23db5d54d47222 100644
--- a/drivers/ata/ahci.h
+++ b/drivers/ata/ahci.h
@@ -195,6 +195,9 @@ enum {
PORT_FBS_EN = (1 << 0), /* Enable FBS */
/* hpriv->flags bits */
+
+#define AHCI_HFLAGS(flags) .private_data = (void *)(flags)
+
AHCI_HFLAG_NO_NCQ = (1 << 0),
AHCI_HFLAG_IGN_IRQ_IF_ERR = (1 << 1), /* ignore IRQ_IF_ERR */
AHCI_HFLAG_IGN_SERR_INTERNAL = (1 << 2), /* ignore SERR_INTERNAL */
@@ -210,6 +213,9 @@ enum {
AHCI_HFLAG_NO_SNTF = (1 << 12), /* no sntf */
AHCI_HFLAG_NO_FPDMA_AA = (1 << 13), /* no FPDMA AA */
AHCI_HFLAG_YES_FBS = (1 << 14), /* force FBS cap on */
+ AHCI_HFLAG_DELAY_ENGINE = (1 << 15), /* do not start engine on
+ port start (wait until
+ error-handling stage) */
/* ap->flags bits */
diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
index 48be4e189163d034d3de2d0dae366db7e252bea7..0c86c77764bc7dec9f4bb6a2605aebac70abd18d 100644
--- a/drivers/ata/ahci_platform.c
+++ b/drivers/ata/ahci_platform.c
@@ -26,6 +26,7 @@
enum ahci_type {
AHCI, /* standard platform ahci */
IMX53_AHCI, /* ahci on i.mx53 */
+ STRICT_AHCI, /* delayed DMA engine start */
};
static struct platform_device_id ahci_devtype[] = {
@@ -35,6 +36,9 @@ static struct platform_device_id ahci_devtype[] = {
}, {
.name = "imx53-ahci",
.driver_data = IMX53_AHCI,
+ }, {
+ .name = "strict-ahci",
+ .driver_data = STRICT_AHCI,
}, {
/* sentinel */
}
@@ -56,6 +60,13 @@ static const struct ata_port_info ahci_port_info[] = {
.udma_mask = ATA_UDMA6,
.port_ops = &ahci_pmp_retry_srst_ops,
},
+ [STRICT_AHCI] = {
+ AHCI_HFLAGS (AHCI_HFLAG_DELAY_ENGINE),
+ .flags = AHCI_FLAG_COMMON,
+ .pio_mask = ATA_PIO4,
+ .udma_mask = ATA_UDMA6,
+ .port_ops = &ahci_ops,
+ },
};
static struct scsi_host_template ahci_platform_sht = {
diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index fdf27b9fce43a882b706bf5148cd51a6a67f4f83..68013f96729ffc624aad80342ec92af6768b89fa 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -321,6 +321,14 @@ static const struct pci_device_id piix_pci_tbl[] = {
{ 0x8086, 0x1e08, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
/* SATA Controller IDE (Panther Point) */
{ 0x8086, 0x1e09, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
+ /* SATA Controller IDE (Lynx Point) */
+ { 0x8086, 0x8c00, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
+ /* SATA Controller IDE (Lynx Point) */
+ { 0x8086, 0x8c01, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
+ /* SATA Controller IDE (Lynx Point) */
+ { 0x8086, 0x8c08, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
+ /* SATA Controller IDE (Lynx Point) */
+ { 0x8086, 0x8c09, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
{ } /* terminate list */
};
diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c
index a72bfd0ecfeebd801143cb0f9767cb9c496b252b..f9eaa82311a9a191dd56fe06881dd318d5c518eb 100644
--- a/drivers/ata/libahci.c
+++ b/drivers/ata/libahci.c
@@ -737,6 +737,7 @@ static void ahci_power_down(struct ata_port *ap)
static void ahci_start_port(struct ata_port *ap)
{
+ struct ahci_host_priv *hpriv = ap->host->private_data;
struct ahci_port_priv *pp = ap->private_data;
struct ata_link *link;
struct ahci_em_priv *emp;
@@ -746,6 +747,10 @@ static void ahci_start_port(struct ata_port *ap)
/* enable FIS reception */
ahci_start_fis_rx(ap);
+ /* enable DMA */
+ if (!(hpriv->flags & AHCI_HFLAG_DELAY_ENGINE))
+ ahci_start_engine(ap);
+
/* turn on LEDs */
if (ap->flags & ATA_FLAG_EM) {
ata_for_each_link(link, ap, EDGE) {
diff --git a/drivers/ata/pata_arasan_cf.c b/drivers/ata/pata_arasan_cf.c
index 048589fad2ca203ef529e7897a2d9d0e2bc858d5..fc2db2a89a6bb27b5d58722814a8e6f3f41957d8 100644
--- a/drivers/ata/pata_arasan_cf.c
+++ b/drivers/ata/pata_arasan_cf.c
@@ -925,11 +925,10 @@ static int arasan_cf_suspend(struct device *dev)
struct ata_host *host = dev_get_drvdata(dev);
struct arasan_cf_dev *acdev = host->ports[0]->private_data;
- if (acdev->dma_chan) {
+ if (acdev->dma_chan)
acdev->dma_chan->device->device_control(acdev->dma_chan,
DMA_TERMINATE_ALL, 0);
- dma_release_channel(acdev->dma_chan);
- }
+
cf_exit(acdev);
return ata_host_suspend(host, PMSG_SUSPEND);
}
@@ -945,10 +944,7 @@ static int arasan_cf_resume(struct device *dev)
return 0;
}
-static const struct dev_pm_ops arasan_cf_pm_ops = {
- .suspend = arasan_cf_suspend,
- .resume = arasan_cf_resume,
-};
+static SIMPLE_DEV_PM_OPS(arasan_cf_pm_ops, arasan_cf_suspend, arasan_cf_resume);
#endif
static struct platform_driver arasan_cf_driver = {
@@ -958,7 +954,7 @@ static struct platform_driver arasan_cf_driver = {
.name = DRIVER_NAME,
.owner = THIS_MODULE,
#ifdef CONFIG_PM
- .pm = &arasan_cf_pm_ops,
+ .pm = &arasan_cf_pm_ops,
#endif
},
};
diff --git a/drivers/ata/pata_cmd64x.c b/drivers/ata/pata_cmd64x.c
index e1fb39a74ce15d35379a7f8066674deeb0fd23cb..1c17cd1e8b2dc55a6e8aa9e3f22e1bb8bb0a6d41 100644
--- a/drivers/ata/pata_cmd64x.c
+++ b/drivers/ata/pata_cmd64x.c
@@ -3,6 +3,7 @@
* (C) 2005 Red Hat Inc
* Alan Cox <alan@lxorguk.ukuu.org.uk>
* (C) 2009-2010 Bartlomiej Zolnierkiewicz
+ * (C) 2012 MontaVista Software, LLC <source@mvista.com>
*
* Based upon
* linux/drivers/ide/pci/cmd64x.c Version 1.30 Sept 10, 2002
@@ -32,7 +33,7 @@
#include <linux/libata.h>
#define DRV_NAME "pata_cmd64x"
-#define DRV_VERSION "0.2.5"
+#define DRV_VERSION "0.2.18"
/*
* CMD64x specific registers definition.
@@ -229,28 +230,85 @@ static void cmd64x_set_dmamode(struct ata_port *ap, struct ata_device *adev)
}
/**
- * cmd648_dma_stop - DMA stop callback
- * @qc: Command in progress
+ * cmd64x_sff_irq_check - check IDE interrupt
+ * @ap: ATA interface
*
- * DMA has completed.
+ * Check IDE interrupt in CFR/ARTTIM23 registers.
*/
-static void cmd648_bmdma_stop(struct ata_queued_cmd *qc)
+static bool cmd64x_sff_irq_check(struct ata_port *ap)
{
- struct ata_port *ap = qc->ap;
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
- u8 dma_intr;
- int dma_mask = ap->port_no ? ARTTIM23_INTR_CH1 : CFR_INTR_CH0;
- int dma_reg = ap->port_no ? ARTTIM23 : CFR;
+ int irq_mask = ap->port_no ? ARTTIM23_INTR_CH1 : CFR_INTR_CH0;
+ int irq_reg = ap->port_no ? ARTTIM23 : CFR;
+ u8 irq_stat;
- ata_bmdma_stop(qc);
+ /* NOTE: reading the register should clear the interrupt */
+ pci_read_config_byte(pdev, irq_reg, &irq_stat);
+
+ return irq_stat & irq_mask;
+}
+
+/**
+ * cmd64x_sff_irq_clear - clear IDE interrupt
+ * @ap: ATA interface
+ *
+ * Clear IDE interrupt in CFR/ARTTIM23 and DMA status registers.
+ */
+
+static void cmd64x_sff_irq_clear(struct ata_port *ap)
+{
+ struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+ int irq_reg = ap->port_no ? ARTTIM23 : CFR;
+ u8 irq_stat;
+
+ ata_bmdma_irq_clear(ap);
- pci_read_config_byte(pdev, dma_reg, &dma_intr);
- pci_write_config_byte(pdev, dma_reg, dma_intr | dma_mask);
+ /* Reading the register should be enough to clear the interrupt */
+ pci_read_config_byte(pdev, irq_reg, &irq_stat);
}
/**
- * cmd646r1_dma_stop - DMA stop callback
+ * cmd648_sff_irq_check - check IDE interrupt
+ * @ap: ATA interface
+ *
+ * Check IDE interrupt in MRDMODE register.
+ */
+
+static bool cmd648_sff_irq_check(struct ata_port *ap)
+{
+ struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+ unsigned long base = pci_resource_start(pdev, 4);
+ int irq_mask = ap->port_no ? MRDMODE_INTR_CH1 : MRDMODE_INTR_CH0;
+ u8 mrdmode = inb(base + 1);
+
+ return mrdmode & irq_mask;
+}
+
+/**
+ * cmd648_sff_irq_clear - clear IDE interrupt
+ * @ap: ATA interface
+ *
+ * Clear IDE interrupt in MRDMODE and DMA status registers.
+ */
+
+static void cmd648_sff_irq_clear(struct ata_port *ap)
+{
+ struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+ unsigned long base = pci_resource_start(pdev, 4);
+ int irq_mask = ap->port_no ? MRDMODE_INTR_CH1 : MRDMODE_INTR_CH0;
+ u8 mrdmode;
+
+ ata_bmdma_irq_clear(ap);
+
+ /* Clear this port's interrupt bit (leaving the other port alone) */
+ mrdmode = inb(base + 1);
+ mrdmode &= ~(MRDMODE_INTR_CH0 | MRDMODE_INTR_CH1);
+ outb(mrdmode | irq_mask, base + 1);
+}
+
+/**
+ * cmd646r1_bmdma_stop - DMA stop callback
* @qc: Command in progress
*
* Stub for now while investigating the r1 quirk in the old driver.
@@ -273,18 +331,30 @@ static const struct ata_port_operations cmd64x_base_ops = {
static struct ata_port_operations cmd64x_port_ops = {
.inherits = &cmd64x_base_ops,
+ .sff_irq_check = cmd64x_sff_irq_check,
+ .sff_irq_clear = cmd64x_sff_irq_clear,
.cable_detect = ata_cable_40wire,
};
static struct ata_port_operations cmd646r1_port_ops = {
.inherits = &cmd64x_base_ops,
+ .sff_irq_check = cmd64x_sff_irq_check,
+ .sff_irq_clear = cmd64x_sff_irq_clear,
.bmdma_stop = cmd646r1_bmdma_stop,
.cable_detect = ata_cable_40wire,
};
+static struct ata_port_operations cmd646r3_port_ops = {
+ .inherits = &cmd64x_base_ops,
+ .sff_irq_check = cmd648_sff_irq_check,
+ .sff_irq_clear = cmd648_sff_irq_clear,
+ .cable_detect = ata_cable_40wire,
+};
+
static struct ata_port_operations cmd648_port_ops = {
.inherits = &cmd64x_base_ops,
- .bmdma_stop = cmd648_bmdma_stop,
+ .sff_irq_check = cmd648_sff_irq_check,
+ .sff_irq_clear = cmd648_sff_irq_clear,
.cable_detect = cmd648_cable_detect,
};
@@ -306,7 +376,7 @@ static void cmd64x_fixup(struct pci_dev *pdev)
static int cmd64x_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
{
- static const struct ata_port_info cmd_info[6] = {
+ static const struct ata_port_info cmd_info[7] = {
{ /* CMD 643 - no UDMA */
.flags = ATA_FLAG_SLAVE_POSS,
.pio_mask = ATA_PIO4,
@@ -319,12 +389,18 @@ static int cmd64x_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
.mwdma_mask = ATA_MWDMA2,
.port_ops = &cmd64x_port_ops
},
- { /* CMD 646 with working UDMA */
+ { /* CMD 646U with broken UDMA */
+ .flags = ATA_FLAG_SLAVE_POSS,
+ .pio_mask = ATA_PIO4,
+ .mwdma_mask = ATA_MWDMA2,
+ .port_ops = &cmd646r3_port_ops
+ },
+ { /* CMD 646U2 with working UDMA */
.flags = ATA_FLAG_SLAVE_POSS,
.pio_mask = ATA_PIO4,
.mwdma_mask = ATA_MWDMA2,
.udma_mask = ATA_UDMA2,
- .port_ops = &cmd64x_port_ops
+ .port_ops = &cmd646r3_port_ops
},
{ /* CMD 646 rev 1 */
.flags = ATA_FLAG_SLAVE_POSS,
@@ -368,21 +444,30 @@ static int cmd64x_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
if (id->driver_data == 0) /* 643 */
ata_pci_bmdma_clear_simplex(pdev);
- if (pdev->device == PCI_DEVICE_ID_CMD_646) {
- /* Does UDMA work ? */
- if (pdev->revision > 4) {
- ppi[0] = &cmd_info[2];
- ppi[1] = &cmd_info[2];
- }
- /* Early rev with other problems ? */
- else if (pdev->revision == 1) {
+ if (pdev->device == PCI_DEVICE_ID_CMD_646)
+ switch (pdev->revision) {
+ /* UDMA works since rev 5 */
+ default:
ppi[0] = &cmd_info[3];
ppi[1] = &cmd_info[3];
- }
- /* revs 1,2 have no CNTRL_CH0 */
- if (pdev->revision < 3)
+ break;
+ /* Interrupts in MRDMODE since rev 3 */
+ case 3:
+ case 4:
+ ppi[0] = &cmd_info[2];
+ ppi[1] = &cmd_info[2];
+ break;
+ /* Rev 1 with other problems? */
+ case 1:
+ ppi[0] = &cmd_info[4];
+ ppi[1] = &cmd_info[4];
+ /* FALL THRU */
+ /* Early revs have no CNTRL_CH0 */
+ case 2:
+ case 0:
cntrl_ch0_ok = 0;
- }
+ break;
+ }
cmd64x_fixup(pdev);
@@ -423,8 +508,8 @@ static int cmd64x_reinit_one(struct pci_dev *pdev)
static const struct pci_device_id cmd64x[] = {
{ PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_643), 0 },
{ PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_646), 1 },
- { PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_648), 4 },
- { PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_649), 5 },
+ { PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_648), 5 },
+ { PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_649), 6 },
{ },
};
diff --git a/drivers/ata/pata_legacy.c b/drivers/ata/pata_legacy.c
index 35aca7d1a3eb13e6d39bb3eb3c8c7a56d2173395..4fe9d2138d48f58f5d094b88ffea6c35416cc935 100644
--- a/drivers/ata/pata_legacy.c
+++ b/drivers/ata/pata_legacy.c
@@ -401,8 +401,7 @@ static void ht6560b_set_piomode(struct ata_port *ap, struct ata_device *adev)
ata_timing_compute(adev, adev->pio_mode, &t, 20000, 1000);
active = clamp_val(t.active, 2, 15);
- recover = clamp_val(t.recover, 2, 16);
- recover &= 0x15;
+ recover = clamp_val(t.recover, 2, 16) & 0x0F;
inb(0x3E6);
inb(0x3E6);
diff --git a/drivers/ata/pata_mpc52xx.c b/drivers/ata/pata_mpc52xx.c
index 00748ae1a016ec9eaf55f93b36a1142fcb73c028..d2c102fd433062618e4206a3eff778a62a4587a2 100644
--- a/drivers/ata/pata_mpc52xx.c
+++ b/drivers/ata/pata_mpc52xx.c
@@ -687,11 +687,11 @@ mpc52xx_ata_probe(struct platform_device *op)
int ata_irq = 0;
struct mpc52xx_ata __iomem *ata_regs;
struct mpc52xx_ata_priv *priv = NULL;
- int rv, ret, task_irq = 0;
+ int rv, task_irq;
int mwdma_mask = 0, udma_mask = 0;
const __be32 *prop;
int proplen;
- struct bcom_task *dmatsk = NULL;
+ struct bcom_task *dmatsk;
/* Get ipb frequency */
ipb_freq = mpc5xxx_get_bus_frequency(op->dev.of_node);
@@ -717,8 +717,7 @@ mpc52xx_ata_probe(struct platform_device *op)
ata_regs = devm_ioremap(&op->dev, res_mem.start, sizeof(*ata_regs));
if (!ata_regs) {
dev_err(&op->dev, "error mapping device registers\n");
- rv = -ENOMEM;
- goto err;
+ return -ENOMEM;
}
/*
@@ -753,7 +752,7 @@ mpc52xx_ata_probe(struct platform_device *op)
if (!priv) {
dev_err(&op->dev, "error allocating private structure\n");
rv = -ENOMEM;
- goto err;
+ goto err1;
}
priv->ipb_period = 1000000000 / (ipb_freq / 1000);
@@ -776,15 +775,15 @@ mpc52xx_ata_probe(struct platform_device *op)
if (!dmatsk) {
dev_err(&op->dev, "bestcomm initialization failed\n");
rv = -ENOMEM;
- goto err;
+ goto err1;
}
task_irq = bcom_get_task_irq(dmatsk);
- ret = request_irq(task_irq, &mpc52xx_ata_task_irq, 0,
+ rv = devm_request_irq(&op->dev, task_irq, &mpc52xx_ata_task_irq, 0,
"ATA task", priv);
- if (ret) {
+ if (rv) {
dev_err(&op->dev, "error requesting DMA IRQ\n");
- goto err;
+ goto err2;
}
priv->dmatsk = dmatsk;
@@ -792,7 +791,7 @@ mpc52xx_ata_probe(struct platform_device *op)
rv = mpc52xx_ata_hw_init(priv);
if (rv) {
dev_err(&op->dev, "error initializing hardware\n");
- goto err;
+ goto err2;
}
/* Register ourselves to libata */
@@ -800,23 +799,16 @@ mpc52xx_ata_probe(struct platform_device *op)
mwdma_mask, udma_mask);
if (rv) {
dev_err(&op->dev, "error registering with ATA layer\n");
- goto err;
+ goto err2;
}
return 0;
- err:
- devm_release_mem_region(&op->dev, res_mem.start, sizeof(*ata_regs));
- if (ata_irq)
- irq_dispose_mapping(ata_irq);
- if (task_irq)
- irq_dispose_mapping(task_irq);
- if (dmatsk)
- bcom_ata_release(dmatsk);
- if (ata_regs)
- devm_iounmap(&op->dev, ata_regs);
- if (priv)
- devm_kfree(&op->dev, priv);
+ err2:
+ irq_dispose_mapping(task_irq);
+ bcom_ata_release(dmatsk);
+ err1:
+ irq_dispose_mapping(ata_irq);
return rv;
}
@@ -835,12 +827,6 @@ mpc52xx_ata_remove(struct platform_device *op)
bcom_ata_release(priv->dmatsk);
irq_dispose_mapping(priv->ata_irq);
- /* Clear up IO allocations */
- devm_iounmap(&op->dev, priv->ata_regs);
- devm_release_mem_region(&op->dev, priv->ata_regs_pa,
- sizeof(*priv->ata_regs));
- devm_kfree(&op->dev, priv);
-
return 0;
}
diff --git a/drivers/ata/sata_fsl.c b/drivers/ata/sata_fsl.c
index 0120b0d1e9a5aa838cee9a7347992377012d6c8c..d6577b93bee3735a8eebf47a38f64dcc72aac182 100644
--- a/drivers/ata/sata_fsl.c
+++ b/drivers/ata/sata_fsl.c
@@ -6,7 +6,7 @@
* Author: Ashish Kalra <ashish.kalra@freescale.com>
* Li Yang <leoli@freescale.com>
*
- * Copyright (c) 2006-2007, 2011 Freescale Semiconductor, Inc.
+ * Copyright (c) 2006-2007, 2011-2012 Freescale Semiconductor, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
@@ -26,6 +26,15 @@
#include <asm/io.h>
#include <linux/of_platform.h>
+static unsigned int intr_coalescing_count;
+module_param(intr_coalescing_count, int, S_IRUGO);
+MODULE_PARM_DESC(intr_coalescing_count,
+ "INT coalescing count threshold (1..31)");
+
+static unsigned int intr_coalescing_ticks;
+module_param(intr_coalescing_ticks, int, S_IRUGO);
+MODULE_PARM_DESC(intr_coalescing_ticks,
+ "INT coalescing timer threshold in AHB ticks");
/* Controller information */
enum {
SATA_FSL_QUEUE_DEPTH = 16,
@@ -82,6 +91,16 @@ enum {
SATA_FSL_IRQ_FLAG = IRQF_SHARED,
};
+/*
+ * Interrupt Coalescing Control Register bitdefs */
+enum {
+ ICC_MIN_INT_COUNT_THRESHOLD = 1,
+ ICC_MAX_INT_COUNT_THRESHOLD = ((1 << 5) - 1),
+ ICC_MIN_INT_TICKS_THRESHOLD = 0,
+ ICC_MAX_INT_TICKS_THRESHOLD = ((1 << 19) - 1),
+ ICC_SAFE_INT_TICKS = 1,
+};
+
/*
* Host Controller command register set - per port
*/
@@ -263,8 +282,65 @@ struct sata_fsl_host_priv {
void __iomem *csr_base;
int irq;
int data_snoop;
+ struct device_attribute intr_coalescing;
};
+static void fsl_sata_set_irq_coalescing(struct ata_host *host,
+ unsigned int count, unsigned int ticks)
+{
+ struct sata_fsl_host_priv *host_priv = host->private_data;
+ void __iomem *hcr_base = host_priv->hcr_base;
+
+ if (count > ICC_MAX_INT_COUNT_THRESHOLD)
+ count = ICC_MAX_INT_COUNT_THRESHOLD;
+ else if (count < ICC_MIN_INT_COUNT_THRESHOLD)
+ count = ICC_MIN_INT_COUNT_THRESHOLD;
+
+ if (ticks > ICC_MAX_INT_TICKS_THRESHOLD)
+ ticks = ICC_MAX_INT_TICKS_THRESHOLD;
+ else if ((ICC_MIN_INT_TICKS_THRESHOLD == ticks) &&
+ (count > ICC_MIN_INT_COUNT_THRESHOLD))
+ ticks = ICC_SAFE_INT_TICKS;
+
+ spin_lock(&host->lock);
+ iowrite32((count << 24 | ticks), hcr_base + ICC);
+
+ intr_coalescing_count = count;
+ intr_coalescing_ticks = ticks;
+ spin_unlock(&host->lock);
+
+ DPRINTK("intrrupt coalescing, count = 0x%x, ticks = %x\n",
+ intr_coalescing_count, intr_coalescing_ticks);
+ DPRINTK("ICC register status: (hcr base: 0x%x) = 0x%x\n",
+ hcr_base, ioread32(hcr_base + ICC));
+}
+
+static ssize_t fsl_sata_intr_coalescing_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return sprintf(buf, "%d %d\n",
+ intr_coalescing_count, intr_coalescing_ticks);
+}
+
+static ssize_t fsl_sata_intr_coalescing_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ unsigned int coalescing_count, coalescing_ticks;
+
+ if (sscanf(buf, "%d%d",
+ &coalescing_count,
+ &coalescing_ticks) != 2) {
+ printk(KERN_ERR "fsl-sata: wrong parameter format.\n");
+ return -EINVAL;
+ }
+
+ fsl_sata_set_irq_coalescing(dev_get_drvdata(dev),
+ coalescing_count, coalescing_ticks);
+
+ return strlen(buf);
+}
+
static inline unsigned int sata_fsl_tag(unsigned int tag,
void __iomem *hcr_base)
{
@@ -346,10 +422,10 @@ static unsigned int sata_fsl_fill_sg(struct ata_queued_cmd *qc, void *cmd_desc,
(unsigned long long)sg_addr, sg_len);
/* warn if each s/g element is not dword aligned */
- if (sg_addr & 0x03)
+ if (unlikely(sg_addr & 0x03))
ata_port_err(qc->ap, "s/g addr unaligned : 0x%llx\n",
(unsigned long long)sg_addr);
- if (sg_len & 0x03)
+ if (unlikely(sg_len & 0x03))
ata_port_err(qc->ap, "s/g len unaligned : 0x%x\n",
sg_len);
@@ -1245,6 +1321,13 @@ static int sata_fsl_init_controller(struct ata_host *host)
iowrite32(0x00000FFFF, hcr_base + CE);
iowrite32(0x00000FFFF, hcr_base + DE);
+ /*
+ * reset the number of command complete bits which will cause the
+ * interrupt to be signaled
+ */
+ fsl_sata_set_irq_coalescing(host, intr_coalescing_count,
+ intr_coalescing_ticks);
+
/*
* host controller will be brought on-line, during xx_port_start()
* callback, that should also initiate the OOB, COMINIT sequence
@@ -1309,7 +1392,7 @@ static int sata_fsl_probe(struct platform_device *ofdev)
void __iomem *csr_base = NULL;
struct sata_fsl_host_priv *host_priv = NULL;
int irq;
- struct ata_host *host;
+ struct ata_host *host = NULL;
u32 temp;
struct ata_port_info pi = sata_fsl_port_info[0];
@@ -1356,6 +1439,10 @@ static int sata_fsl_probe(struct platform_device *ofdev)
/* allocate host structure */
host = ata_host_alloc_pinfo(&ofdev->dev, ppi, SATA_FSL_MAX_PORTS);
+ if (!host) {
+ retval = -ENOMEM;
+ goto error_exit_with_cleanup;
+ }
/* host->iomap is not used currently */
host->private_data = host_priv;
@@ -1373,10 +1460,24 @@ static int sata_fsl_probe(struct platform_device *ofdev)
dev_set_drvdata(&ofdev->dev, host);
+ host_priv->intr_coalescing.show = fsl_sata_intr_coalescing_show;
+ host_priv->intr_coalescing.store = fsl_sata_intr_coalescing_store;
+ sysfs_attr_init(&host_priv->intr_coalescing.attr);
+ host_priv->intr_coalescing.attr.name = "intr_coalescing";
+ host_priv->intr_coalescing.attr.mode = S_IRUGO | S_IWUSR;
+ retval = device_create_file(host->dev, &host_priv->intr_coalescing);
+ if (retval)
+ goto error_exit_with_cleanup;
+
return 0;
error_exit_with_cleanup:
+ if (host) {
+ dev_set_drvdata(&ofdev->dev, NULL);
+ ata_host_detach(host);
+ }
+
if (hcr_base)
iounmap(hcr_base);
if (host_priv)
@@ -1390,6 +1491,8 @@ static int sata_fsl_remove(struct platform_device *ofdev)
struct ata_host *host = dev_get_drvdata(&ofdev->dev);
struct sata_fsl_host_priv *host_priv = host->private_data;
+ device_remove_file(&ofdev->dev, &host_priv->intr_coalescing);
+
ata_host_detach(host);
dev_set_drvdata(&ofdev->dev, NULL);