[git patches] libata updates

Jeff Garzik
2008-05-06T15:49:16Z

- sata_mv: continued fixing
- sata_inic: make it actually work
- new driver from Intel
- misc fixes from Tejun

Please pull from 'upstream-linus' branch of
master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev.git upstream-linus

to receive the following updates:

drivers/ata/Kconfig | 13 +-
drivers/ata/Makefile | 1 +
drivers/ata/ahci.c | 4 +-
drivers/ata/ata_generic.c | 6 +
drivers/ata/ata_piix.c | 25 ++
drivers/ata/libata-core.c | 1 +
drivers/ata/libata-eh.c | 2 +-
drivers/ata/libata-sff.c | 6 +-
drivers/ata/pata_acpi.c | 6 +
drivers/ata/pata_sch.c | 206 +++++++++++++
drivers/ata/sata_inic162x.c | 646 ++++++++++++++++++++++++++--------------
drivers/ata/sata_mv.c | 688 +++++++++++++++++++++++++++++++++----------
include/linux/libata.h | 16 +
13 files changed, 1222 insertions(+), 398 deletions(-)
create mode 100644 drivers/ata/pata_sch.c

Alan Cox (1):
pata_atiixp: Don't disable

Alek Du (1):
libata: Add Intel SCH PATA driver

Mark Lord (13):
sata_mv more cosmetic changes
sata_mv pci features
sata_mv wait for empty+idle
sata_mv new mv_qc_defer method
sata_mv errata workaround for sata25 part 1
sata_mv rearrange mv_config_fbs
sata_mv NCQ and SError fixes for mv_err_intr
sata_mv fix mv_host_intr bug for hc_irq_cause
sata_mv new mv_port_intr function
libata: export ata_eh_analyze_ncq_error
sata_mv delayed eh handling
sata_mv NCQ-EH for FIS-based switching
sata_mv use hweight16() for bit counting (V2)

Tejun Heo (12):
libata: improve post-reset device ready test
ata_piix: verify SIDPR access before enabling it
sata_inic162x: misc clean ups
sata_inic162x: add / update constants
sata_inic162x: update TF read handling
sata_inic162x: use IDMA for ATA_PROT_DMA
sata_inic162x: kill now unused bmdma related stuff
sata_inic162x: use IDMA for non DMA ATA commands
sata_inic162x: use IDMA for ATAPI commands
sata_inic162x: kill now unused SFF related stuff
sata_inic162x: add cardbus support
sata_inic162x: update intro comment, up the version and drop EXPERIMENTAL

diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index 1c11df9..9bf2986 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -205,8 +205,8 @@ config SATA_VITESSE
If unsure, say N.

config SATA_INIC162X
- tristate "Initio 162x SATA support (HIGHLY EXPERIMENTAL)"
- depends on PCI && EXPERIMENTAL
+ tristate "Initio 162x SATA support"
+ depends on PCI
help
This option enables support for Initio 162x Serial ATA.

@@ -697,6 +697,15 @@ config PATA_SCC

If unsure, say N.

+config PATA_SCH
+ tristate "Intel SCH PATA support"
+ depends on PCI
+ help
+ This option enables support for Intel SCH PATA on the Intel
+ SCH (US15W, US15L, UL11L) series host controllers.
+
+ If unsure, say N.
+
config PATA_BF54X
tristate "Blackfin 54x ATAPI support"
depends on BF542 || BF548 || BF549
diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile
index b693d82..674965f 100644
--- a/drivers/ata/Makefile
+++ b/drivers/ata/Makefile
@@ -67,6 +67,7 @@ obj-$(CONFIG_PATA_SIS) += pata_sis.o
obj-$(CONFIG_PATA_TRIFLEX) += pata_triflex.o
obj-$(CONFIG_PATA_IXP4XX_CF) += pata_ixp4xx_cf.o
obj-$(CONFIG_PATA_SCC) += pata_scc.o
+obj-$(CONFIG_PATA_SCH) += pata_sch.o
obj-$(CONFIG_PATA_BF54X) += pata_bf54x.o
obj-$(CONFIG_PATA_PLATFORM) += pata_platform.o
obj-$(CONFIG_PATA_OF_PLATFORM) += pata_of_platform.o
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 8cace9a..97f83fb 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -1267,9 +1267,7 @@ static int ahci_check_ready(struct ata_link *link)
void __iomem *port_mmio = ahci_port_base(link->ap);
u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF;

- if (!(status & ATA_BUSY))
- return 1;
- return 0;
+ return ata_check_ready(status);
}

static int ahci_softreset(struct ata_link *link, unsigned int *class,
diff --git a/drivers/ata/ata_generic.c b/drivers/ata/ata_generic.c
index 47aeccd..75a406f 100644
--- a/drivers/ata/ata_generic.c
+++ b/drivers/ata/ata_generic.c
@@ -152,6 +152,12 @@ static int ata_generic_init_one(struct pci_dev *dev, const struct pci_device_id
if (dev->vendor == PCI_VENDOR_ID_AL)
ata_pci_bmdma_clear_simplex(dev);

+ if (dev->vendor == PCI_VENDOR_ID_ATI) {
+ int rc = pcim_enable_device(dev);
+ if (rc < 0)
+ return rc;
+ pcim_pin_device(dev);
+ }
return ata_pci_sff_init_one(dev, ppi, &generic_sht, NULL);
}

diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index ea2c764..a9027b8 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -1348,6 +1348,8 @@ static void __devinit piix_init_sidpr(struct ata_host *host)
{
struct pci_dev *pdev = to_pci_dev(host->dev);
struct piix_host_priv *hpriv = host->private_data;
+ struct ata_device *dev0 = &host->ports[0]->link.device[0];
+ u32 scontrol;
int i;

/* check for availability */
@@ -1366,6 +1368,29 @@ static void __devinit piix_init_sidpr(struct ata_host *host)
return;

hpriv->sidpr = pcim_iomap_table(pdev)[PIIX_SIDPR_BAR];
+
+ /* SCR access via SIDPR doesn't work on some configurations.
+ * Give it a test drive by inhibiting power save modes which
+ * we'll do anyway.
+ */
+ scontrol = piix_sidpr_read(dev0, SCR_CONTROL);
+
+ /* if IPM is already 3, SCR access is probably working. Don't
+ * un-inhibit power save modes as BIOS might have inhibited
+ * them for a reason.
+ */
+ if ((scontrol & 0xf00) != 0x300) {
+ scontrol |= 0x300;
+ piix_sidpr_write(dev0, SCR_CONTROL, scontrol);
+ scontrol = piix_sidpr_read(dev0, SCR_CONTROL);
+
+ if ((scontrol & 0xf00) != 0x300) {
+ dev_printk(KERN_INFO, host->dev, "SCR access via "
+ "SIDPR is available but doesn't work\n");
+ return;
+ }
+ }
+
host->ports[0]->ops = &piix_sidpr_sata_ops;
host->ports[1]->ops = &piix_sidpr_sata_ops;
}
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 3bc4885..927b692 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -6292,6 +6292,7 @@ EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
EXPORT_SYMBOL_GPL(ata_eh_thaw_port);
EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
+EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error);
EXPORT_SYMBOL_GPL(ata_do_eh);
EXPORT_SYMBOL_GPL(ata_std_error_handler);

diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 61dcd00..62e0331 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1357,7 +1357,7 @@ static void ata_eh_analyze_serror(struct ata_link *link)
* LOCKING:
* Kernel thread context (may sleep).
*/
-static void ata_eh_analyze_ncq_error(struct ata_link *link)
+void ata_eh_analyze_ncq_error(struct ata_link *link)
{
struct ata_port *ap = link->ap;
struct ata_eh_context *ehc = &link->eh_context;
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index 2ec65a8..3c2d228 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -314,11 +314,7 @@ static int ata_sff_check_ready(struct ata_link *link)
{
u8 status = link->ap->ops->sff_check_status(link->ap);

- if (!(status & ATA_BUSY))
- return 1;
- if (status == 0xff)
- return -ENODEV;
- return 0;
+ return ata_check_ready(status);
}

/**
diff --git a/drivers/ata/pata_acpi.c b/drivers/ata/pata_acpi.c
index c5f91e6..fbe6057 100644
--- a/drivers/ata/pata_acpi.c
+++ b/drivers/ata/pata_acpi.c
@@ -259,6 +259,12 @@ static int pacpi_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
.port_ops = &pacpi_ops,
};
const struct ata_port_info *ppi[] = { &info, NULL };
+ if (pdev->vendor == PCI_VENDOR_ID_ATI) {
+ int rc = pcim_enable_device(pdev);
+ if (rc < 0)
+ return rc;
+ pcim_pin_device(pdev);
+ }
return ata_pci_sff_init_one(pdev, ppi, &pacpi_sht, NULL);
}

diff --git a/drivers/ata/pata_sch.c b/drivers/ata/pata_sch.c
new file mode 100644
index 0000000..c8cc027
--- /dev/null
+++ b/drivers/ata/pata_sch.c
@@ -0,0 +1,206 @@
+/*
+ * pata_sch.c - Intel SCH PATA controllers
+ *
+ * Copyright (c) 2008 Alek Du <alek.du@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License 2 as published
+ * by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING. If not, write to
+ * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+/*
+ * Supports:
+ * Intel SCH (AF82US15W, AF82US15L, AF82UL11L) chipsets -- see spec at:
+ * http://download.intel.com/design/chipsets/embedded/datashts/319537.pdf
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/blkdev.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <scsi/scsi_host.h>
+#include <linux/libata.h>
+#include <linux/dmi.h>
+
+#define DRV_NAME "pata_sch"
+#define DRV_VERSION "0.2"
+
+/* see SCH datasheet page 351 */
+enum {
+ D0TIM = 0x80, /* Device 0 Timing Register */
+ D1TIM = 0x84, /* Device 1 Timing Register */
+ PM = 0x07, /* PIO Mode Bit Mask */
+ MDM = (0x03 << 8), /* Multi-word DMA Mode Bit Mask */
+ UDM = (0x07 << 16), /* Ultra DMA Mode Bit Mask */
+ PPE = (1 << 30), /* Prefetch/Post Enable */
+ USD = (1 << 31), /* Use Synchronous DMA */
+};
+
+static int sch_init_one(struct pci_dev *pdev,
+ const struct pci_device_id *ent);
+static void sch_set_piomode(struct ata_port *ap, struct ata_device *adev);
+static void sch_set_dmamode(struct ata_port *ap, struct ata_device *adev);
+
+static const struct pci_device_id sch_pci_tbl[] = {
+ /* Intel SCH PATA Controller */
+ { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_SCH_IDE), 0 },
+ { } /* terminate list */
+};
+
+static struct pci_driver sch_pci_driver = {
+ .name = DRV_NAME,
+ .id_table = sch_pci_tbl,
+ .probe = sch_init_one,
+ .remove = ata_pci_remove_one,
+#ifdef CONFIG_PM
+ .suspend = ata_pci_device_suspend,
+ .resume = ata_pci_device_resume,
+#endif
+};
+
+static struct scsi_host_template sch_sht = {
+ ATA_BMDMA_SHT(DRV_NAME),
+};
+
+static struct ata_port_operations sch_pata_ops = {
+ .inherits = &ata_bmdma_port_ops,
+ .cable_detect = ata_cable_unknown,
+ .set_piomode = sch_set_piomode,
+ .set_dmamode = sch_set_dmamode,
+};
+
+static struct ata_port_info sch_port_info = {
+ .flags = 0,
+ .pio_mask = ATA_PIO4, /* pio0-4 */
+ .mwdma_mask = ATA_MWDMA2, /* mwdma0-2 */
+ .udma_mask = ATA_UDMA5, /* udma0-5 */
+ .port_ops = &sch_pata_ops,
+};
+
+MODULE_AUTHOR("Alek Du <alek.du@intel.com>");
+MODULE_DESCRIPTION("SCSI low-level driver for Intel SCH PATA controllers");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, sch_pci_tbl);
+MODULE_VERSION(DRV_VERSION);
+
+/**
+ * sch_set_piomode - Initialize host controller PATA PIO timings
+ * @ap: Port whose timings we are configuring
+ * @adev: ATA device
+ *
+ * Set PIO mode for device, in host controller PCI config space.
+ *
+ * LOCKING:
+ * None (inherited from caller).
+ */
+
+static void sch_set_piomode(struct ata_port *ap, struct ata_device *adev)
+{
+ unsigned int pio = adev->pio_mode - XFER_PIO_0;
+ struct pci_dev *dev = to_pci_dev(ap->host->dev);
+ unsigned int port = adev->devno ? D1TIM : D0TIM;
+ unsigned int data;
+
+ pci_read_config_dword(dev, port, &data);
+ /* see SCH datasheet page 351 */
+ /* set PIO mode */
+ data &= ~(PM | PPE);
+ data |= pio;
+ /* enable PPE for block device */
+ if (adev->class == ATA_DEV_ATA)
+ data |= PPE;
+ pci_write_config_dword(dev, port, data);
+}
+
+/**
+ * sch_set_dmamode - Initialize host controller PATA DMA timings
+ * @ap: Port whose timings we are configuring
+ * @adev: ATA device
+ *
+ * Set MW/UDMA mode for device, in host controller PCI config space.
+ *
+ * LOCKING:
+ * None (inherited from caller).
+ */
+
+static void sch_set_dmamode(struct ata_port *ap, struct ata_device *adev)
+{
+ unsigned int dma_mode = adev->dma_mode;
+ struct pci_dev *dev = to_pci_dev(ap->host->dev);
+ unsigned int port = adev->devno ? D1TIM : D0TIM;
+ unsigned int data;
+
+ pci_read_config_dword(dev, port, &data);
+ /* see SCH datasheet page 351 */
+ if (dma_mode >= XFER_UDMA_0) {
+ /* enable Synchronous DMA mode */
+ data |= USD;
+ data &= ~UDM;
+ data |= (dma_mode - XFER_UDMA_0) << 16;
+ } else { /* must be MWDMA mode, since we masked SWDMA already */
+ data &= ~(USD | MDM);
+ data |= (dma_mode - XFER_MW_DMA_0) << 8;
+ }
+ pci_write_config_dword(dev, port, data);
+}
+
+/**
+ * sch_init_one - Register SCH ATA PCI device with kernel services
+ * @pdev: PCI device to register
+ * @ent: Entry in sch_pci_tbl matching with @pdev
+ *
+ * LOCKING:
+ * Inherited from PCI layer (may sleep).
+ *
+ * RETURNS:
+ * Zero on success, or -ERRNO value.
+ */
+
+static int __devinit sch_init_one(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ static int printed_version;
+ const struct ata_port_info *ppi[] = { &sch_port_info, NULL };
+ struct ata_host *host;
+ int rc;
+
+ if (!printed_version++)
+ dev_printk(KERN_DEBUG, &pdev->dev,
+ "version " DRV_VERSION "\n");
+
+ /* enable device and prepare host */
+ rc = pcim_enable_device(pdev);
+ if (rc)
+ return rc;
+ rc = ata_pci_sff_prepare_host(pdev, ppi, &host);
+ if (rc)
+ return rc;
+ pci_set_master(pdev);
+ return ata_pci_sff_activate_host(host, ata_sff_interrupt, &sch_sht);
+}
+
+static int __init sch_init(void)
+{
+ return pci_register_driver(&sch_pci_driver);
+}
+
+static void __exit sch_exit(void)
+{
+ pci_unregister_driver(&sch_pci_driver);
+}
+
+module_init(sch_init);
+module_exit(sch_exit);
diff --git a/drivers/ata/sata_inic162x.c b/drivers/ata/sata_inic162x.c
index d27bb9a..3ead02f 100644
--- a/drivers/ata/sata_inic162x.c
+++ b/drivers/ata/sata_inic162x.c
@@ -10,13 +10,33 @@
* right. Documentation is available at initio's website but it only
* documents registers (not programming model).
*
- * - ATA disks work.
- * - Hotplug works.
- * - ATAPI read works but burning doesn't. This thing is really
- * peculiar about ATAPI and I couldn't figure out how ATAPI PIO and
- * ATAPI DMA WRITE should be programmed. If you've got a clue, be
- * my guest.
- * - Both STR and STD work.
+ * This driver has interesting history. The first version was written
+ * from the documentation and a 2.4 IDE driver posted on a Taiwan
+ * company, which didn't use any IDMA features and couldn't handle
+ * LBA48. The resulting driver couldn't handle LBA48 devices either
+ * making it pretty useless.
+ *
+ * After a while, initio picked the driver up, renamed it to
+ * sata_initio162x, updated it to use IDMA for ATA DMA commands and
+ * posted it on their website. It only used ATA_PROT_DMA for IDMA and
+ * attaching both devices and issuing IDMA and !IDMA commands
+ * simultaneously broke it due to PIRQ masking interaction but it did
+ * show how to use the IDMA (ADMA + some initio specific twists)
+ * engine.
+ *
+ * Then, I picked up their changes again and here's the usable driver
+ * which uses IDMA for everything. Everything works now including
+ * LBA48, CD/DVD burning, suspend/resume and hotplug. There are some
+ * issues tho. Result Tf is not resported properly, NCQ isn't
+ * supported yet and CD/DVD writing works with DMA assisted PIO
+ * protocol (which, for native SATA devices, shouldn't cause any
+ * noticeable difference).
+ *
+ * Anyways, so, here's finally a working driver for inic162x. Enjoy!
+ *
+ * initio: If you guys wanna improve the driver regarding result TF
+ * access and other stuff, please feel free to contact me. I'll be
+ * happy to assist.
*/

#include <linux/kernel.h>
@@ -28,13 +48,19 @@
#include <scsi/scsi_device.h>

#define DRV_NAME "sata_inic162x"
-#define DRV_VERSION "0.3"
+#define DRV_VERSION "0.4"

enum {
- MMIO_BAR = 5,
+ MMIO_BAR_PCI = 5,
+ MMIO_BAR_CARDBUS = 1,

NR_PORTS = 2,

+ IDMA_CPB_TBL_SIZE = 4 * 32,
+
+ INIC_DMA_BOUNDARY = 0xffffff,
+
+ HOST_ACTRL = 0x08,
HOST_CTL = 0x7c,
HOST_STAT = 0x7e,
HOST_IRQ_STAT = 0xbc,
@@ -43,22 +69,37 @@ enum {
PORT_SIZE = 0x40,

/* registers for ATA TF operation */
- PORT_TF = 0x00,
- PORT_ALT_STAT = 0x08,
+ PORT_TF_DATA = 0x00,
+ PORT_TF_FEATURE = 0x01,
+ PORT_TF_NSECT = 0x02,
+ PORT_TF_LBAL = 0x03,
+ PORT_TF_LBAM = 0x04,
+ PORT_TF_LBAH = 0x05,
+ PORT_TF_DEVICE = 0x06,
+ PORT_TF_COMMAND = 0x07,
+ PORT_TF_ALT_STAT = 0x08,
PORT_IRQ_STAT = 0x09,
PORT_IRQ_MASK = 0x0a,
PORT_PRD_CTL = 0x0b,
PORT_PRD_ADDR = 0x0c,
PORT_PRD_XFERLEN = 0x10,
+ PORT_CPB_CPBLAR = 0x18,
+ PORT_CPB_PTQFIFO = 0x1c,

/* IDMA register */
PORT_IDMA_CTL = 0x14,
+ PORT_IDMA_STAT = 0x16,
+
+ PORT_RPQ_FIFO = 0x1e,
+ PORT_RPQ_CNT = 0x1f,

PORT_SCR = 0x20,

/* HOST_CTL bits */
HCTL_IRQOFF = (1 << 8), /* global IRQ off */
- HCTL_PWRDWN = (1 << 13), /* power down PHYs */
+ HCTL_FTHD0 = (1 << 10), /* fifo threshold 0 */
+ HCTL_FTHD1 = (1 << 11), /* fifo threshold 1*/
+ HCTL_PWRDWN = (1 << 12), /* power down PHYs */
HCTL_SOFTRST = (1 << 13), /* global reset (no phy reset) */
HCTL_RPGSEL = (1 << 15), /* register page select */

@@ -81,9 +122,7 @@ enum {
PIRQ_PENDING = (1 << 7), /* port IRQ pending (STAT only) */

PIRQ_ERR = PIRQ_OFFLINE | PIRQ_ONLINE | PIRQ_FATAL,
-
- PIRQ_MASK_DMA_READ = PIRQ_REPLY | PIRQ_ATA,
- PIRQ_MASK_OTHER = PIRQ_REPLY | PIRQ_COMPLETE,
+ PIRQ_MASK_DEFAULT = PIRQ_REPLY | PIRQ_ATA,
PIRQ_MASK_FREEZE = 0xff,

/* PORT_PRD_CTL bits */
@@ -96,20 +135,104 @@ enum {
IDMA_CTL_RST_IDMA = (1 << 5), /* reset IDMA machinary */
IDMA_CTL_GO = (1 << 7), /* IDMA mode go */
IDMA_CTL_ATA_NIEN = (1 << 8), /* ATA IRQ disable */
+
+ /* PORT_IDMA_STAT bits */
+ IDMA_STAT_PERR = (1 << 0), /* PCI ERROR MODE */
+ IDMA_STAT_CPBERR = (1 << 1), /* ADMA CPB error */
+ IDMA_STAT_LGCY = (1 << 3), /* ADMA legacy */
+ IDMA_STAT_UIRQ = (1 << 4), /* ADMA unsolicited irq */
+ IDMA_STAT_STPD = (1 << 5), /* ADMA stopped */
+ IDMA_STAT_PSD = (1 << 6), /* ADMA pause */
+ IDMA_STAT_DONE = (1 << 7), /* ADMA done */
+
+ IDMA_STAT_ERR = IDMA_STAT_PERR | IDMA_STAT_CPBERR,
+
+ /* CPB Control Flags*/
+ CPB_CTL_VALID = (1 << 0), /* CPB valid */
+ CPB_CTL_QUEUED = (1 << 1), /* queued command */
+ CPB_CTL_DATA = (1 << 2), /* data, rsvd in datasheet */
+ CPB_CTL_IEN = (1 << 3), /* PCI interrupt enable */
+ CPB_CTL_DEVDIR = (1 << 4), /* device direction control */
+
+ /* CPB Response Flags */
+ CPB_RESP_DONE = (1 << 0), /* ATA command complete */
+ CPB_RESP_REL = (1 << 1), /* ATA release */
+ CPB_RESP_IGNORED = (1 << 2), /* CPB ignored */
+ CPB_RESP_ATA_ERR = (1 << 3), /* ATA command error */
+ CPB_RESP_SPURIOUS = (1 << 4), /* ATA spurious interrupt error */
+ CPB_RESP_UNDERFLOW = (1 << 5), /* APRD deficiency length error */
+ CPB_RESP_OVERFLOW = (1 << 6), /* APRD exccess length error */
+ CPB_RESP_CPB_ERR = (1 << 7), /* CPB error flag */
+
+ /* PRD Control Flags */
+ PRD_DRAIN = (1 << 1), /* ignore data excess */
+ PRD_CDB = (1 << 2), /* atapi packet command pointer */
+ PRD_DIRECT_INTR = (1 << 3), /* direct interrupt */
+ PRD_DMA = (1 << 4), /* data transfer method */
+ PRD_WRITE = (1 << 5), /* data dir, rsvd in datasheet */
+ PRD_IOM = (1 << 6), /* io/memory transfer */
+ PRD_END = (1 << 7), /* APRD chain end */
};

+/* Comman Parameter Block */
+struct inic_cpb {
+ u8 resp_flags; /* Response Flags */
+ u8 error; /* ATA Error */
+ u8 status; /* ATA Status */
+ u8 ctl_flags; /* Control Flags */
+ __le32 len; /* Total Transfer Length */
+ __le32 prd; /* First PRD pointer */
+ u8 rsvd[4];
+ /* 16 bytes */
+ u8 feature; /* ATA Feature */
+ u8 hob_feature; /* ATA Ex. Feature */
+ u8 device; /* ATA Device/Head */
+ u8 mirctl; /* Mirror Control */
+ u8 nsect; /* ATA Sector Count */
+ u8 hob_nsect; /* ATA Ex. Sector Count */
+ u8 lbal; /* ATA Sector Number */
+ u8 hob_lbal; /* ATA Ex. Sector Number */
+ u8 lbam; /* ATA Cylinder Low */
+ u8 hob_lbam; /* ATA Ex. Cylinder Low */
+ u8 lbah; /* ATA Cylinder High */
+ u8 hob_lbah; /* ATA Ex. Cylinder High */
+ u8 command; /* ATA Command */
+ u8 ctl; /* ATA Control */
+ u8 slave_error; /* Slave ATA Error */
+ u8 slave_status; /* Slave ATA Status */
+ /* 32 bytes */
+} __packed;
+
+/* Physical Region Descriptor */
+struct inic_prd {
+ __le32 mad; /* Physical Memory Address */
+ __le16 len; /* Transfer Length */
+ u8 rsvd;
+ u8 flags; /* Control Flags */
+} __packed;
+
+struct inic_pkt {
+ struct inic_cpb cpb;
+ struct inic_prd prd[LIBATA_MAX_PRD + 1]; /* + 1 for cdb */
+ u8 cdb[ATAPI_CDB_LEN];
+} __packed;
+
struct inic_host_priv {
- u16 cached_hctl;
+ void __iomem *mmio_base;
+ u16 cached_hctl;
};

struct inic_port_priv {
- u8 dfl_prdctl;
- u8 cached_prdctl;
- u8 cached_pirq_mask;
+ struct inic_pkt *pkt;
+ dma_addr_t pkt_dma;
+ u32 *cpb_tbl;
+ dma_addr_t cpb_tbl_dma;
};

static struct scsi_host_template inic_sht = {
- ATA_BMDMA_SHT(DRV_NAME),
+ ATA_BASE_SHT(DRV_NAME),
+ .sg_tablesize = LIBATA_MAX_PRD, /* maybe it can be larger? */
+ .dma_boundary = INIC_DMA_BOUNDARY,
};

static const int scr_map[] = {
@@ -120,54 +243,34 @@ static const int scr_map[] = {

static void __iomem *inic_port_base(struct ata_port *ap)
{
- return ap->host->iomap[MMIO_BAR] + ap->port_no * PORT_SIZE;
-}
-
-static void __inic_set_pirq_mask(struct ata_port *ap, u8 mask)
-{
- void __iomem *port_base = inic_port_base(ap);
- struct inic_port_priv *pp = ap->private_data;
+ struct inic_host_priv *hpriv = ap->host->private_data;

- writeb(mask, port_base + PORT_IRQ_MASK);
- pp->cached_pirq_mask = mask;
-}
-
-static void inic_set_pirq_mask(struct ata_port *ap, u8 mask)
-{
- struct inic_port_priv *pp = ap->private_data;
-
- if (pp->cached_pirq_mask != mask)
- __inic_set_pirq_mask(ap, mask);
+ return hpriv->mmio_base + ap->port_no * PORT_SIZE;
}

static void inic_reset_port(void __iomem *port_base)
{
void __iomem *idma_ctl = port_base + PORT_IDMA_CTL;
- u16 ctl;

- ctl = readw(idma_ctl);
- ctl &= ~(IDMA_CTL_RST_IDMA | IDMA_CTL_ATA_NIEN | IDMA_CTL_GO);
+ /* stop IDMA engine */
+ readw(idma_ctl); /* flush */
+ msleep(1);

/* mask IRQ and assert reset */
- writew(ctl | IDMA_CTL_RST_IDMA | IDMA_CTL_ATA_NIEN, idma_ctl);
+ writew(IDMA_CTL_RST_IDMA, idma_ctl);
readw(idma_ctl); /* flush */
-
- /* give it some time */
msleep(1);

/* release reset */
- writew(ctl | IDMA_CTL_ATA_NIEN, idma_ctl);
+ writew(0, idma_ctl);

/* clear irq */
writeb(0xff, port_base + PORT_IRQ_STAT);
-
- /* reenable ATA IRQ, turn off IDMA mode */
- writew(ctl, idma_ctl);
}

static int inic_scr_read(struct ata_port *ap, unsigned sc_reg, u32 *val)
{
- void __iomem *scr_addr = ap->ioaddr.scr_addr;
+ void __iomem *scr_addr = inic_port_base(ap) + PORT_SCR;
void __iomem *addr;

if (unlikely(sc_reg >= ARRAY_SIZE(scr_map)))
@@ -184,120 +287,126 @@ static int inic_scr_read(struct ata_port *ap, unsigned sc_reg, u32 *val)

static int inic_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val)
{
- void __iomem *scr_addr = ap->ioaddr.scr_addr;
- void __iomem *addr;
+ void __iomem *scr_addr = inic_port_base(ap) + PORT_SCR;

if (unlikely(sc_reg >= ARRAY_SIZE(scr_map)))
return -EINVAL;

- addr = scr_addr + scr_map[sc_reg] * 4;
writel(val, scr_addr + scr_map[sc_reg] * 4);
return 0;
}

-/*
- * In TF mode, inic162x is very similar to SFF device. TF registers
- * function the same. DMA engine behaves similary using the same PRD
- * format as BMDMA but different command register, interrupt and event
- * notification methods are used. The following inic_bmdma_*()
- * functions do the impedance matching.
- */
-static void inic_bmdma_setup(struct ata_queued_cmd *qc)
+static void inic_stop_idma(struct ata_port *ap)
{
- struct ata_port *ap = qc->ap;
- struct inic_port_priv *pp = ap->private_data;
void __iomem *port_base = inic_port_base(ap);
- int rw = qc->tf.flags & ATA_TFLAG_WRITE;
-
- /* make sure device sees PRD table writes */
- wmb();
-
- /* load transfer length */
- writel(qc->nbytes, port_base + PORT_PRD_XFERLEN);
-
- /* turn on DMA and specify data direction */
- pp->cached_prdctl = pp->dfl_prdctl | PRD_CTL_DMAEN;
- if (!rw)
- pp->cached_prdctl |= PRD_CTL_WR;
- writeb(pp->cached_prdctl, port_base + PORT_PRD_CTL);

- /* issue r/w command */
- ap->ops->sff_exec_command(ap, &qc->tf);
+ readb(port_base + PORT_RPQ_FIFO);
+ readb(port_base + PORT_RPQ_CNT);
+ writew(0, port_base + PORT_IDMA_CTL);
}

-static void inic_bmdma_start(struct ata_queued_cmd *qc)
+static void inic_host_err_intr(struct ata_port *ap, u8 irq_stat, u16 idma_stat)
{
- struct ata_port *ap = qc->ap;
+ struct ata_eh_info *ehi = &ap->link.eh_info;
struct inic_port_priv *pp = ap->private_data;
- void __iomem *port_base = inic_port_base(ap);
+ struct inic_cpb *cpb = &pp->pkt->cpb;
+ bool freeze = false;

- /* start host DMA transaction */
- pp->cached_prdctl |= PRD_CTL_START;
- writeb(pp->cached_prdctl, port_base + PORT_PRD_CTL);
-}
+ ata_ehi_clear_desc(ehi);
+ ata_ehi_push_desc(ehi, "irq_stat=0x%x idma_stat=0x%x",
+ irq_stat, idma_stat);

-static void inic_bmdma_stop(struct ata_queued_cmd *qc)
-{
- struct ata_port *ap = qc->ap;
- struct inic_port_priv *pp = ap->private_data;
- void __iomem *port_base = inic_port_base(ap);
+ inic_stop_idma(ap);

- /* stop DMA engine */
- writeb(pp->dfl_prdctl, port_base + PORT_PRD_CTL);
-}
+ if (irq_stat & (PIRQ_OFFLINE | PIRQ_ONLINE)) {
+ ata_ehi_push_desc(ehi, "hotplug");
+ ata_ehi_hotplugged(ehi);
+ freeze = true;
+ }

-static u8 inic_bmdma_status(struct ata_port *ap)
-{
- /* event is already verified by the interrupt handler */
- return ATA_DMA_INTR;
+ if (idma_stat & IDMA_STAT_PERR) {
+ ata_ehi_push_desc(ehi, "PCI error");
+ freeze = true;
+ }
+
+ if (idma_stat & IDMA_STAT_CPBERR) {
+ ata_ehi_push_desc(ehi, "CPB error");
+
+ if (cpb->resp_flags & CPB_RESP_IGNORED) {
+ __ata_ehi_push_desc(ehi, " ignored");
+ ehi->err_mask |= AC_ERR_INVALID;
+ freeze = true;
+ }
+
+ if (cpb->resp_flags & CPB_RESP_ATA_ERR)
+ ehi->err_mask |= AC_ERR_DEV;
+
+ if (cpb->resp_flags & CPB_RESP_SPURIOUS) {
+ __ata_ehi_push_desc(ehi, " spurious-intr");
+ ehi->err_mask |= AC_ERR_HSM;
+ freeze = true;
+ }
+
+ if (cpb->resp_flags &
+ (CPB_RESP_UNDERFLOW | CPB_RESP_OVERFLOW)) {
+ __ata_ehi_push_desc(ehi, " data-over/underflow");
+ ehi->err_mask |= AC_ERR_HSM;
+ freeze = true;
+ }
+ }
+
+ if (freeze)
+ ata_port_freeze(ap);
+ else
+ ata_port_abort(ap);
}

static void inic_host_intr(struct ata_port *ap)
{
void __iomem *port_base = inic_port_base(ap);
- struct ata_eh_info *ehi = &ap->link.eh_info;
+ struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->link.active_tag);
u8 irq_stat;
+ u16 idma_stat;

- /* fetch and clear irq */
+ /* read and clear IRQ status */
irq_stat = readb(port_base + PORT_IRQ_STAT);
writeb(irq_stat, port_base + PORT_IRQ_STAT);
+ idma_stat = readw(port_base + PORT_IDMA_STAT);

- if (likely(!(irq_stat & PIRQ_ERR))) {
- struct ata_queued_cmd *qc =
- ata_qc_from_tag(ap, ap->link.active_tag);
+ if (unlikely((irq_stat & PIRQ_ERR) || (idma_stat & IDMA_STAT_ERR)))
+ inic_host_err_intr(ap, irq_stat, idma_stat);

- if (unlikely(!qc || (qc->tf.flags & ATA_TFLAG_POLLING))) {
- ap->ops->sff_check_status(ap); /* clear ATA interrupt */
- return;
- }
+ if (unlikely(!qc))
+ goto spurious;

- if (likely(ata_sff_host_intr(ap, qc)))
- return;
+ if (likely(idma_stat & IDMA_STAT_DONE)) {
+ inic_stop_idma(ap);

- ap->ops->sff_check_status(ap); /* clear ATA interrupt */
- ata_port_printk(ap, KERN_WARNING, "unhandled "
- "interrupt, irq_stat=%x\n", irq_stat);
+ /* Depending on circumstances, device error
+ * isn't reported by IDMA, check it explicitly.
+ */
+ if (unlikely(readb(port_base + PORT_TF_COMMAND) &
+ (ATA_DF | ATA_ERR)))
+ qc->err_mask |= AC_ERR_DEV;
+
+ ata_qc_complete(qc);
return;
}

- /* error */
- ata_ehi_push_desc(ehi, "irq_stat=0x%x", irq_stat);
-
- if (irq_stat & (PIRQ_OFFLINE | PIRQ_ONLINE)) {
- ata_ehi_hotplugged(ehi);
- ata_port_freeze(ap);
- } else
- ata_port_abort(ap);
+ spurious:
+ ata_port_printk(ap, KERN_WARNING, "unhandled interrupt: "
+ "cmd=0x%x irq_stat=0x%x idma_stat=0x%x\n",
+ qc ? qc->tf.command : 0xff, irq_stat, idma_stat);
}

static irqreturn_t inic_interrupt(int irq, void *dev_instance)
{
struct ata_host *host = dev_instance;
- void __iomem *mmio_base = host->iomap[MMIO_BAR];
+ struct inic_host_priv *hpriv = host->private_data;
u16 host_irq_stat;
int i, handled = 0;;

- host_irq_stat = readw(mmio_base + HOST_IRQ_STAT);
+ host_irq_stat = readw(hpriv->mmio_base + HOST_IRQ_STAT);

if (unlikely(!(host_irq_stat & HIRQ_GLOBAL)))
goto out;
@@ -327,60 +436,173 @@ static irqreturn_t inic_interrupt(int irq, void *dev_instance)
return IRQ_RETVAL(handled);
}

+static int inic_check_atapi_dma(struct ata_queued_cmd *qc)
+{
+ /* For some reason ATAPI_PROT_DMA doesn't work for some
+ * commands including writes and other misc ops. Use PIO
+ * protocol instead, which BTW is driven by the DMA engine
+ * anyway, so it shouldn't make much difference for native
+ * SATA devices.
+ */
+ if (atapi_cmd_type(qc->cdb[0]) == READ)
+ return 0;
+ return 1;
+}
+
+static void inic_fill_sg(struct inic_prd *prd, struct ata_queued_cmd *qc)
+{
+ struct scatterlist *sg;
+ unsigned int si;
+ u8 flags = 0;
+
+ if (qc->tf.flags & ATA_TFLAG_WRITE)
+ flags |= PRD_WRITE;
+
+ if (ata_is_dma(qc->tf.protocol))
+ flags |= PRD_DMA;
+
+ for_each_sg(qc->sg, sg, qc->n_elem, si) {
+ prd->mad = cpu_to_le32(sg_dma_address(sg));
+ prd->len = cpu_to_le16(sg_dma_len(sg));
+ prd->flags = flags;
+ prd++;
+ }
+
+ WARN_ON(!si);
+ prd[-1].flags |= PRD_END;
+}
+
+static void inic_qc_prep(struct ata_queued_cmd *qc)
+{
+ struct inic_port_priv *pp = qc->ap->private_data;
+ struct inic_pkt *pkt = pp->pkt;
+ struct inic_cpb *cpb = &pkt->cpb;
+ struct inic_prd *prd = pkt->prd;
+ bool is_atapi = ata_is_atapi(qc->tf.protocol);
+ bool is_data = ata_is_data(qc->tf.protocol);
+ unsigned int cdb_len = 0;
+
+ VPRINTK("ENTER\n");
+
+ if (is_atapi)
+ cdb_len = qc->dev->cdb_len;
+
+ /* prepare packet, based on initio driver */
+ memset(pkt, 0, sizeof(struct inic_pkt));
+
+ cpb->ctl_flags = CPB_CTL_VALID | CPB_CTL_IEN;
+ if (is_atapi || is_data)
+ cpb->ctl_flags |= CPB_CTL_DATA;
+
+ cpb->len = cpu_to_le32(qc->nbytes + cdb_len);
+ cpb->prd = cpu_to_le32(pp->pkt_dma + offsetof(struct inic_pkt, prd));
+
+ cpb->device = qc->tf.device;
+ cpb->feature = qc->tf.feature;
+ cpb->nsect = qc->tf.nsect;
+ cpb->lbal = qc->tf.lbal;
+ cpb->lbam = qc->tf.lbam;
+ cpb->lbah = qc->tf.lbah;
+
+ if (qc->tf.flags & ATA_TFLAG_LBA48) {
+ cpb->hob_feature = qc->tf.hob_feature;
+ cpb->hob_nsect = qc->tf.hob_nsect;
+ cpb->hob_lbal = qc->tf.hob_lbal;
+ cpb->hob_lbam = qc->tf.hob_lbam;
+ cpb->hob_lbah = qc->tf.hob_lbah;
+ }
+
+ cpb->command = qc->tf.command;
+ /* don't load ctl - dunno why. it's like that in the initio driver */
+
+ /* setup PRD for CDB */
+ if (is_atapi) {
+ memcpy(pkt->cdb, qc->cdb, ATAPI_CDB_LEN);
+ prd->mad = cpu_to_le32(pp->pkt_dma +
+ offsetof(struct inic_pkt, cdb));
+ prd->len = cpu_to_le16(cdb_len);
+ prd->flags = PRD_CDB | PRD_WRITE;
+ if (!is_data)
+ prd->flags |= PRD_END;
+ prd++;
+ }
+
+ /* setup sg table */
+ if (is_data)
+ inic_fill_sg(prd, qc);
+
+ pp->cpb_tbl[0] = pp->pkt_dma;
+}
+
static unsigned int inic_qc_issue(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
+ void __iomem *port_base = inic_port_base(ap);

- /* ATA IRQ doesn't wait for DMA transfer completion and vice
- * versa. Mask IRQ selectively to detect command completion.
- * Without it, ATA DMA read command can cause data corruption.
- *
- * Something similar might be needed for ATAPI writes. I
- * tried a lot of combinations but couldn't find the solution.
- */
- if (qc->tf.protocol == ATA_PROT_DMA &&
- !(qc->tf.flags & ATA_TFLAG_WRITE))
- inic_set_pirq_mask(ap, PIRQ_MASK_DMA_READ);
- else
- inic_set_pirq_mask(ap, PIRQ_MASK_OTHER);
+ /* fire up the ADMA engine */
+ writew(HCTL_FTHD0, port_base + HOST_CTL);
+ writew(IDMA_CTL_GO, port_base + PORT_IDMA_CTL);
+ writeb(0, port_base + PORT_CPB_PTQFIFO);
+
+ return 0;
+}
+
+static void inic_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
+{
+ void __iomem *port_base = inic_port_base(ap);
+
+ tf->feature = readb(port_base + PORT_TF_FEATURE);
+ tf->nsect = readb(port_base + PORT_TF_NSECT);
+ tf->lbal = readb(port_base + PORT_TF_LBAL);
+ tf->lbam = readb(port_base + PORT_TF_LBAM);
+ tf->lbah = readb(port_base + PORT_TF_LBAH);
+ tf->device = readb(port_base + PORT_TF_DEVICE);
+ tf->command = readb(port_base + PORT_TF_COMMAND);
+}

- /* Issuing a command to yet uninitialized port locks up the
- * controller. Most of the time, this happens for the first
- * command after reset which are ATA and ATAPI IDENTIFYs.
- * Fast fail if stat is 0x7f or 0xff for those commands.
+static bool inic_qc_fill_rtf(struct ata_queued_cmd *qc)
+{
+ struct ata_taskfile *rtf = &qc->result_tf;
+ struct ata_taskfile tf;
+
+ /* FIXME: Except for status and error, result TF access
+ * doesn't work. I tried reading from BAR0/2, CPB and BAR5.
+ * None works regardless of which command interface is used.
+ * For now return true iff status indicates device error.
+ * This means that we're reporting bogus sector for RW
+ * failures. Eeekk....
*/
- if (unlikely(qc->tf.command == ATA_CMD_ID_ATA ||
- qc->tf.command == ATA_CMD_ID_ATAPI)) {
- u8 stat = ap->ops->sff_check_status(ap);
- if (stat == 0x7f || stat == 0xff)
- return AC_ERR_HSM;
- }
+ inic_tf_read(qc->ap, &tf);

- return ata_sff_qc_issue(qc);
+ if (!(tf.command & ATA_ERR))
+ return false;
+
+ rtf->command = tf.command;
+ rtf->feature = tf.feature;
+ return true;
}

static void inic_freeze(struct ata_port *ap)
{
void __iomem *port_base = inic_port_base(ap);

- __inic_set_pirq_mask(ap, PIRQ_MASK_FREEZE);
-
- ap->ops->sff_check_status(ap);
+ writeb(PIRQ_MASK_FREEZE, port_base + PORT_IRQ_MASK);
writeb(0xff, port_base + PORT_IRQ_STAT);
-
- readb(port_base + PORT_IRQ_STAT); /* flush */
}

static void inic_thaw(struct ata_port *ap)
{
void __iomem *port_base = inic_port_base(ap);

- ap->ops->sff_check_status(ap);
writeb(0xff, port_base + PORT_IRQ_STAT);
+ writeb(PIRQ_MASK_DEFAULT, port_base + PORT_IRQ_MASK);
+}

- __inic_set_pirq_mask(ap, PIRQ_MASK_OTHER);
+static int inic_check_ready(struct ata_link *link)
+{
+ void __iomem *port_base = inic_port_base(link->ap);

- readb(port_base + PORT_IRQ_STAT); /* flush */
+ return ata_check_ready(readb(port_base + PORT_TF_COMMAND));
}

/*
@@ -394,17 +616,15 @@ static int inic_hardreset(struct ata_link *link, unsigned int *class,
void __iomem *port_base = inic_port_base(ap);
void __iomem *idma_ctl = port_base + PORT_IDMA_CTL;
const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
- u16 val;
int rc;

/* hammer it into sane state */
inic_reset_port(port_base);

- val = readw(idma_ctl);
- writew(val | IDMA_CTL_RST_ATA, idma_ctl);
+ writew(IDMA_CTL_RST_ATA, idma_ctl);
readw(idma_ctl); /* flush */
msleep(1);
- writew(val & ~IDMA_CTL_RST_ATA, idma_ctl);
+ writew(0, idma_ctl);

rc = sata_link_resume(link, timing, deadline);
if (rc) {
@@ -418,7 +638,7 @@ static int inic_hardreset(struct ata_link *link, unsigned int *class,
struct ata_taskfile tf;

/* wait for link to become ready */
- rc = ata_sff_wait_after_reset(link, 1, deadline);
+ rc = ata_wait_after_reset(link, deadline, inic_check_ready);
/* link occupied, -ENODEV too is an error */
if (rc) {
ata_link_printk(link, KERN_WARNING, "device not ready "
@@ -426,7 +646,7 @@ static int inic_hardreset(struct ata_link *link, unsigned int *class,
return rc;
}

- ata_sff_tf_read(ap, &tf);
+ inic_tf_read(ap, &tf);
*class = ata_dev_classify(&tf);
}

@@ -436,18 +656,8 @@ static int inic_hardreset(struct ata_link *link, unsigned int *class,
static void inic_error_handler(struct ata_port *ap)
{
void __iomem *port_base = inic_port_base(ap);
- struct inic_port_priv *pp = ap->private_data;
- unsigned long flags;

- /* reset PIO HSM and stop DMA engine */
inic_reset_port(port_base);
-
- spin_lock_irqsave(ap->lock, flags);
- ap->hsm_task_state = HSM_ST_IDLE;
- writeb(pp->dfl_prdctl, port_base + PORT_PRD_CTL);
- spin_unlock_irqrestore(ap->lock, flags);
-
- /* PIO and DMA engines have been stopped, perform recovery */
ata_std_error_handler(ap);
}

@@ -458,26 +668,18 @@ static void inic_post_internal_cmd(struct ata_queued_cmd *qc)
inic_reset_port(inic_port_base(qc->ap));
}

-static void inic_dev_config(struct ata_device *dev)
-{
- /* inic can only handle upto LBA28 max sectors */
- if (dev->max_sectors > ATA_MAX_SECTORS)
- dev->max_sectors = ATA_MAX_SECTORS;
-
- if (dev->n_sectors >= 1 << 28) {
- ata_dev_printk(dev, KERN_ERR,
- "ERROR: This driver doesn't support LBA48 yet and may cause\n"
- " data corruption on such devices. Disabling.\n");
- ata_dev_disable(dev);
- }
-}
-
static void init_port(struct ata_port *ap)
{
void __iomem *port_base = inic_port_base(ap);
+ struct inic_port_priv *pp = ap->private_data;

- /* Setup PRD address */
+ /* clear packet and CPB table */
+ memset(pp->pkt, 0, sizeof(struct inic_pkt));
+ memset(pp->cpb_tbl, 0, IDMA_CPB_TBL_SIZE);
+
+ /* setup PRD and CPB lookup table addresses */
writel(ap->prd_dma, port_base + PORT_PRD_ADDR);
+ writel(pp->cpb_tbl_dma, port_base + PORT_CPB_CPBLAR);
}

static int inic_port_resume(struct ata_port *ap)
@@ -488,28 +690,30 @@ static int inic_port_resume(struct ata_port *ap)

static int inic_port_start(struct ata_port *ap)
{
- void __iomem *port_base = inic_port_base(ap);
+ struct device *dev = ap->host->dev;
struct inic_port_priv *pp;
- u8 tmp;
int rc;

/* alloc and initialize private data */
- pp = devm_kzalloc(ap->host->dev, sizeof(*pp), GFP_KERNEL);
+ pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
if (!pp)
return -ENOMEM;
ap->private_data = pp;

- /* default PRD_CTL value, DMAEN, WR and START off */
- tmp = readb(port_base + PORT_PRD_CTL);
- tmp &= ~(PRD_CTL_DMAEN | PRD_CTL_WR | PRD_CTL_START);
- pp->dfl_prdctl = tmp;
-
/* Alloc resources */
rc = ata_port_start(ap);
- if (rc) {
- kfree(pp);
+ if (rc)
return rc;
- }
+
+ pp->pkt = dmam_alloc_coherent(dev, sizeof(struct inic_pkt),
+ &pp->pkt_dma, GFP_KERNEL);
+ if (!pp->pkt)
+ return -ENOMEM;
+
+ pp->cpb_tbl = dmam_alloc_coherent(dev, IDMA_CPB_TBL_SIZE,
+ &pp->cpb_tbl_dma, GFP_KERNEL);
+ if (!pp->cpb_tbl)
+ return -ENOMEM;

init_port(ap);

@@ -517,21 +721,18 @@ static int inic_port_start(struct ata_port *ap)
}

static struct ata_port_operations inic_port_ops = {
- .inherits = &ata_sff_port_ops,
+ .inherits = &sata_port_ops,

- .bmdma_setup = inic_bmdma_setup,
- .bmdma_start = inic_bmdma_start,
- .bmdma_stop = inic_bmdma_stop,
- .bmdma_status = inic_bmdma_status,
+ .check_atapi_dma = inic_check_atapi_dma,
+ .qc_prep = inic_qc_prep,
.qc_issue = inic_qc_issue,
+ .qc_fill_rtf = inic_qc_fill_rtf,

.freeze = inic_freeze,
.thaw = inic_thaw,
- .softreset = ATA_OP_NULL, /* softreset is broken */
.hardreset = inic_hardreset,
.error_handler = inic_error_handler,
.post_internal_cmd = inic_post_internal_cmd,
- .dev_config = inic_dev_config,

.scr_read = inic_scr_read,
.scr_write = inic_scr_write,
@@ -541,12 +742,6 @@ static struct ata_port_operations inic_port_ops = {
};

static struct ata_port_info inic_port_info = {
- /* For some reason, ATAPI_PROT_PIO is broken on this
- * controller, and no, PIO_POLLING does't fix it. It somehow
- * manages to report the wrong ireason and ignoring ireason
- * results in machine lock up. Tell libata to always prefer
- * DMA.
- */
.flags = ATA_FLAG_SATA | ATA_FLAG_PIO_DMA,
.pio_mask = 0x1f, /* pio0-4 */
.mwdma_mask = 0x07, /* mwdma0-2 */
@@ -599,7 +794,6 @@ static int inic_pci_device_resume(struct pci_dev *pdev)
{
struct ata_host *host = dev_get_drvdata(&pdev->dev);
struct inic_host_priv *hpriv = host->private_data;
- void __iomem *mmio_base = host->iomap[MMIO_BAR];
int rc;

rc = ata_pci_device_do_resume(pdev);
@@ -607,7 +801,7 @@ static int inic_pci_device_resume(struct pci_dev *pdev)
return rc;

if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND) {
- rc = init_controller(mmio_base, hpriv->cached_hctl);
+ rc = init_controller(hpriv->mmio_base, hpriv->cached_hctl);
if (rc)
return rc;
}
@@ -625,6 +819,7 @@ static int inic_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
struct ata_host *host;
struct inic_host_priv *hpriv;
void __iomem * const *iomap;
+ int mmio_bar;
int i, rc;

if (!printed_version++)
@@ -638,38 +833,31 @@ static int inic_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)

host->private_data = hpriv;

- /* acquire resources and fill host */
+ /* Acquire resources and fill host. Note that PCI and cardbus
+ * use different BARs.
+ */
rc = pcim_enable_device(pdev);
if (rc)
return rc;

- rc = pcim_iomap_regions(pdev, 0x3f, DRV_NAME);
+ if (pci_resource_flags(pdev, MMIO_BAR_PCI) & IORESOURCE_MEM)
+ mmio_bar = MMIO_BAR_PCI;
+ else
+ mmio_bar = MMIO_BAR_CARDBUS;
+
+ rc = pcim_iomap_regions(pdev, 1 << mmio_bar, DRV_NAME);
if (rc)
return rc;
host->iomap = iomap = pcim_iomap_table(pdev);
+ hpriv->mmio_base = iomap[mmio_bar];
+ hpriv->cached_hctl = readw(hpriv->mmio_base + HOST_CTL);

for (i = 0; i < NR_PORTS; i++) {
struct ata_port *ap = host->ports[i];
- struct ata_ioports *port = &ap->ioaddr;
- unsigned int offset = i * PORT_SIZE;
-
- port->cmd_addr = iomap[2 * i];
- port->altstatus_addr =
- port->ctl_addr = (void __iomem *)
- ((unsigned long)iomap[2 * i + 1] | ATA_PCI_CTL_OFS);
- port->scr_addr = iomap[MMIO_BAR] + offset + PORT_SCR;
-
- ata_sff_std_ports(port);
-
- ata_port_pbar_desc(ap, MMIO_BAR, -1, "mmio");
- ata_port_pbar_desc(ap, MMIO_BAR, offset, "port");
- ata_port_desc(ap, "cmd 0x%llx ctl 0x%llx",
- (unsigned long long)pci_resource_start(pdev, 2 * i),
- (unsigned long long)pci_resource_start(pdev, (2 * i + 1)) |
- ATA_PCI_CTL_OFS);
- }

- hpriv->cached_hctl = readw(iomap[MMIO_BAR] + HOST_CTL);
+ ata_port_pbar_desc(ap, mmio_bar, -1, "mmio");
+ ata_port_pbar_desc(ap, mmio_bar, i * PORT_SIZE, "port");
+ }

/* Set dma_mask. This devices doesn't support 64bit addressing. */
rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
@@ -698,7 +886,7 @@ static int inic_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
return rc;
}

- rc = init_controller(iomap[MMIO_BAR], hpriv->cached_hctl);
+ rc = init_controller(hpriv->mmio_base, hpriv->cached_hctl);
if (rc) {
dev_printk(KERN_ERR, &pdev->dev,
"failed to initialize controller\n");
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index 842b1a1..bb73b22 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -65,6 +65,7 @@
#include <linux/platform_device.h>
#include <linux/ata_platform.h>
#include <linux/mbus.h>
+#include <linux/bitops.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
@@ -91,9 +92,9 @@ enum {
MV_IRQ_COAL_TIME_THRESHOLD = (MV_IRQ_COAL_REG_BASE + 0xd0),

MV_SATAHC0_REG_BASE = 0x20000,
- MV_FLASH_CTL = 0x1046c,
- MV_GPIO_PORT_CTL = 0x104f0,
- MV_RESET_CFG = 0x180d8,
+ MV_FLASH_CTL_OFS = 0x1046c,
+ MV_GPIO_PORT_CTL_OFS = 0x104f0,
+ MV_RESET_CFG_OFS = 0x180d8,

MV_PCI_REG_SZ = MV_MAJOR_REG_AREA_SZ,
MV_SATAHC_REG_SZ = MV_MAJOR_REG_AREA_SZ,
@@ -147,18 +148,21 @@ enum {
/* PCI interface registers */

PCI_COMMAND_OFS = 0xc00,
+ PCI_COMMAND_MRDTRIG = (1 << 7), /* PCI Master Read Trigger */

PCI_MAIN_CMD_STS_OFS = 0xd30,
STOP_PCI_MASTER = (1 << 2),
PCI_MASTER_EMPTY = (1 << 3),
GLOB_SFT_RST = (1 << 4),

- MV_PCI_MODE = 0xd00,
+ MV_PCI_MODE_OFS = 0xd00,
+ MV_PCI_MODE_MASK = 0x30,
+
MV_PCI_EXP_ROM_BAR_CTL = 0xd2c,
MV_PCI_DISC_TIMER = 0xd04,
MV_PCI_MSI_TRIGGER = 0xc38,
MV_PCI_SERR_MASK = 0xc28,
- MV_PCI_XBAR_TMOUT = 0x1d04,
+ MV_PCI_XBAR_TMOUT_OFS = 0x1d04,
MV_PCI_ERR_LOW_ADDRESS = 0x1d40,
MV_PCI_ERR_HIGH_ADDRESS = 0x1d44,
MV_PCI_ERR_ATTRIBUTE = 0x1d48,
@@ -225,16 +229,18 @@ enum {
PHY_MODE4 = 0x314,
PHY_MODE2 = 0x330,
SATA_IFCTL_OFS = 0x344,
+ SATA_TESTCTL_OFS = 0x348,
SATA_IFSTAT_OFS = 0x34c,
VENDOR_UNIQUE_FIS_OFS = 0x35c,

- FIS_CFG_OFS = 0x360,
- FIS_CFG_SINGLE_SYNC = (1 << 16), /* SYNC on DMA activation */
+ FISCFG_OFS = 0x360,
+ FISCFG_WAIT_DEV_ERR = (1 << 8), /* wait for host on DevErr */
+ FISCFG_SINGLE_SYNC = (1 << 16), /* SYNC on DMA activation */

MV5_PHY_MODE = 0x74,
- MV5_LT_MODE = 0x30,
- MV5_PHY_CTL = 0x0C,
- SATA_INTERFACE_CFG = 0x050,
+ MV5_LTMODE_OFS = 0x30,
+ MV5_PHY_CTL_OFS = 0x0C,
+ SATA_INTERFACE_CFG_OFS = 0x050,

MV_M2_PREAMP_MASK = 0x7e0,

@@ -332,10 +338,16 @@ enum {
EDMA_CMD_OFS = 0x28, /* EDMA command register */
EDMA_EN = (1 << 0), /* enable EDMA */
EDMA_DS = (1 << 1), /* disable EDMA; self-negated */
- ATA_RST = (1 << 2), /* reset trans/link/phy */
+ EDMA_RESET = (1 << 2), /* reset eng/trans/link/phy */
+
+ EDMA_STATUS_OFS = 0x30, /* EDMA engine status */
+ EDMA_STATUS_CACHE_EMPTY = (1 << 6), /* GenIIe command cache empty */
+ EDMA_STATUS_IDLE = (1 << 7), /* GenIIe EDMA enabled/idle */

- EDMA_IORDY_TMOUT = 0x34,
- EDMA_ARB_CFG = 0x38,
+ EDMA_IORDY_TMOUT_OFS = 0x34,
+ EDMA_ARB_CFG_OFS = 0x38,
+
+ EDMA_HALTCOND_OFS = 0x60, /* GenIIe halt conditions */

GEN_II_NCQ_MAX_SECTORS = 256, /* max sects/io on Gen2 w/NCQ */

@@ -350,15 +362,19 @@ enum {
MV_HP_GEN_II = (1 << 7), /* Generation II: 60xx */
MV_HP_GEN_IIE = (1 << 8), /* Generation IIE: 6042/7042 */
MV_HP_PCIE = (1 << 9), /* PCIe bus/regs: 7042 */
+ MV_HP_CUT_THROUGH = (1 << 10), /* can use EDMA cut-through */

/* Port private flags (pp_flags) */
MV_PP_FLAG_EDMA_EN = (1 << 0), /* is EDMA engine enabled? */
MV_PP_FLAG_NCQ_EN = (1 << 1), /* is EDMA set up for NCQ? */
+ MV_PP_FLAG_FBS_EN = (1 << 2), /* is EDMA set up for FBS? */
+ MV_PP_FLAG_DELAYED_EH = (1 << 3), /* delayed dev err handling */
};

#define IS_GEN_I(hpriv) ((hpriv)->hp_flags & MV_HP_GEN_I)
#define IS_GEN_II(hpriv) ((hpriv)->hp_flags & MV_HP_GEN_II)
#define IS_GEN_IIE(hpriv) ((hpriv)->hp_flags & MV_HP_GEN_IIE)
+#define IS_PCIE(hpriv) ((hpriv)->hp_flags & MV_HP_PCIE)
#define HAS_PCI(host) (!((host)->ports[0]->flags & MV_FLAG_SOC))

#define WINDOW_CTRL(i) (0x20030 + ((i) << 4))
@@ -433,6 +449,7 @@ struct mv_port_priv {
unsigned int resp_idx;

u32 pp_flags;
+ unsigned int delayed_eh_pmp_map;
};

struct mv_port_signal {
@@ -479,6 +496,7 @@ static int mv5_scr_read(struct ata_port *ap, unsigned int sc_reg_in, u32 *val);
static int mv5_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val);
static int mv_port_start(struct ata_port *ap);
static void mv_port_stop(struct ata_port *ap);
+static int mv_qc_defer(struct ata_queued_cmd *qc);
static void mv_qc_prep(struct ata_queued_cmd *qc);
static void mv_qc_prep_iie(struct ata_queued_cmd *qc);
static unsigned int mv_qc_issue(struct ata_queued_cmd *qc);
@@ -527,6 +545,9 @@ static int mv_pmp_hardreset(struct ata_link *link, unsigned int *class,
unsigned long deadline);
static int mv_softreset(struct ata_link *link, unsigned int *class,
unsigned long deadline);
+static void mv_pmp_error_handler(struct ata_port *ap);
+static void mv_process_crpb_entries(struct ata_port *ap,
+ struct mv_port_priv *pp);

/* .sg_tablesize is (MV_MAX_SG_CT / 2) in the structures below
* because we have to allow room for worst case splitting of
@@ -548,6 +569,7 @@ static struct scsi_host_template mv6_sht = {
static struct ata_port_operations mv5_ops = {
.inherits = &ata_sff_port_ops,

+ .qc_defer = mv_qc_defer,
.qc_prep = mv_qc_prep,
.qc_issue = mv_qc_issue,

@@ -566,7 +588,6 @@ static struct ata_port_operations mv5_ops = {

static struct ata_port_operations mv6_ops = {
.inherits = &mv5_ops,
- .qc_defer = sata_pmp_qc_defer_cmd_switch,
.dev_config = mv6_dev_config,
.scr_read = mv_scr_read,
.scr_write = mv_scr_write,
@@ -574,12 +595,11 @@ static struct ata_port_operations mv6_ops = {
.pmp_hardreset = mv_pmp_hardreset,
.pmp_softreset = mv_softreset,
.softreset = mv_softreset,
- .error_handler = sata_pmp_error_handler,
+ .error_handler = mv_pmp_error_handler,
};

static struct ata_port_operations mv_iie_ops = {
.inherits = &mv6_ops,
- .qc_defer = ata_std_qc_defer, /* FIS-based switching */
.dev_config = ATA_OP_NULL,
.qc_prep = mv_qc_prep_iie,
};
@@ -875,6 +895,29 @@ static void mv_start_dma(struct ata_port *ap, void __iomem *port_mmio,
}
}

+static void mv_wait_for_edma_empty_idle(struct ata_port *ap)
+{
+ void __iomem *port_mmio = mv_ap_base(ap);
+ const u32 empty_idle = (EDMA_STATUS_CACHE_EMPTY | EDMA_STATUS_IDLE);
+ const int per_loop = 5, timeout = (15 * 1000 / per_loop);
+ int i;
+
+ /*
+ * Wait for the EDMA engine to finish transactions in progress.
+ * No idea what a good "timeout" value might be, but measurements
+ * indicate that it often requires hundreds of microseconds
+ * with two drives in-use. So we use the 15msec value above
+ * as a rough guess at what even more drives might require.
+ */
+ for (i = 0; i < timeout; ++i) {
+ u32 edma_stat = readl(port_mmio + EDMA_STATUS_OFS);
+ if ((edma_stat & empty_idle) == empty_idle)
+ break;
+ udelay(per_loop);
+ }
+ /* ata_port_printk(ap, KERN_INFO, "%s: %u+ usecs\n", __func__, i); */
+}
+
/**
* mv_stop_edma_engine - Disable eDMA engine
* @port_mmio: io base address
@@ -907,6 +950,7 @@ static int mv_stop_edma(struct ata_port *ap)
if (!(pp->pp_flags & MV_PP_FLAG_EDMA_EN))
return 0;
pp->pp_flags &= ~MV_PP_FLAG_EDMA_EN;
+ mv_wait_for_edma_empty_idle(ap);
if (mv_stop_edma_engine(port_mmio)) {
ata_port_printk(ap, KERN_ERR, "Unable to stop eDMA\n");
return -EIO;
@@ -1057,26 +1101,95 @@ static void mv6_dev_config(struct ata_device *adev)
}
}

-static void mv_config_fbs(void __iomem *port_mmio, int enable_fbs)
+static int mv_qc_defer(struct ata_queued_cmd *qc)
{
- u32 old_fcfg, new_fcfg, old_ltmode, new_ltmode;
+ struct ata_link *link = qc->dev->link;
+ struct ata_port *ap = link->ap;
+ struct mv_port_priv *pp = ap->private_data;
+
+ /*
+ * Don't allow new commands if we're in a delayed EH state
+ * for NCQ and/or FIS-based switching.
+ */
+ if (pp->pp_flags & MV_PP_FLAG_DELAYED_EH)
+ return ATA_DEFER_PORT;
/*
- * Various bit settings required for operation
- * in FIS-based switching (fbs) mode on GenIIe:
+ * If the port is completely idle, then allow the new qc.
*/
- old_fcfg = readl(port_mmio + FIS_CFG_OFS);
- old_ltmode = readl(port_mmio + LTMODE_OFS);
- if (enable_fbs) {
- new_fcfg = old_fcfg | FIS_CFG_SINGLE_SYNC;
- new_ltmode = old_ltmode | LTMODE_BIT8;
- } else { /* disable fbs */
- new_fcfg = old_fcfg & ~FIS_CFG_SINGLE_SYNC;
- new_ltmode = old_ltmode & ~LTMODE_BIT8;
- }
- if (new_fcfg != old_fcfg)
- writelfl(new_fcfg, port_mmio + FIS_CFG_OFS);
+ if (ap->nr_active_links == 0)
+ return 0;
+
+ if (pp->pp_flags & MV_PP_FLAG_EDMA_EN) {
+ /*
+ * The port is operating in host queuing mode (EDMA).
+ * It can accomodate a new qc if the qc protocol
+ * is compatible with the current host queue mode.
+ */
+ if (pp->pp_flags & MV_PP_FLAG_NCQ_EN) {
+ /*
+ * The host queue (EDMA) is in NCQ mode.
+ * If the new qc is also an NCQ command,
+ * then allow the new qc.
+ */
+ if (qc->tf.protocol == ATA_PROT_NCQ)
+ return 0;
+ } else {
+ /*
+ * The host queue (EDMA) is in non-NCQ, DMA mode.
+ * If the new qc is also a non-NCQ, DMA command,
+ * then allow the new qc.
+ */
+ if (qc->tf.protocol == ATA_PROT_DMA)
+ return 0;
+ }
+ }
+ return ATA_DEFER_PORT;
+}
+
+static void mv_config_fbs(void __iomem *port_mmio, int want_ncq, int want_fbs)
+{
+ u32 new_fiscfg, old_fiscfg;
+ u32 new_ltmode, old_ltmode;
+ u32 new_haltcond, old_haltcond;
+
+ old_fiscfg = readl(port_mmio + FISCFG_OFS);
+ old_ltmode = readl(port_mmio + LTMODE_OFS);
+ old_haltcond = readl(port_mmio + EDMA_HALTCOND_OFS);
+
+ new_fiscfg = old_fiscfg & ~(FISCFG_SINGLE_SYNC | FISCFG_WAIT_DEV_ERR);
+ new_ltmode = old_ltmode & ~LTMODE_BIT8;
+ new_haltcond = old_haltcond | EDMA_ERR_DEV;
+
+ if (want_fbs) {
+ new_fiscfg = old_fiscfg | FISCFG_SINGLE_SYNC;
+ new_ltmode = old_ltmode | LTMODE_BIT8;
+ if (want_ncq)
+ new_haltcond &= ~EDMA_ERR_DEV;
+ else
+ new_fiscfg |= FISCFG_WAIT_DEV_ERR;
+ }
+
+ if (new_fiscfg != old_fiscfg)
+ writelfl(new_fiscfg, port_mmio + FISCFG_OFS);
if (new_ltmode != old_ltmode)
writelfl(new_ltmode, port_mmio + LTMODE_OFS);
+ if (new_haltcond != old_haltcond)
+ writelfl(new_haltcond, port_mmio + EDMA_HALTCOND_OFS);
+}
+
+static void mv_60x1_errata_sata25(struct ata_port *ap, int want_ncq)
+{
+ struct mv_host_priv *hpriv = ap->host->private_data;
+ u32 old, new;
+
+ /* workaround for 88SX60x1 FEr SATA#25 (part 1) */
+ old = readl(hpriv->base + MV_GPIO_PORT_CTL_OFS);
+ if (want_ncq)
+ new = old | (1 << 22);
+ else
+ new = old & ~(1 << 22);
+ if (new != old)
+ writel(new, hpriv->base + MV_GPIO_PORT_CTL_OFS);
}

static void mv_edma_cfg(struct ata_port *ap, int want_ncq)
@@ -1088,25 +1201,40 @@ static void mv_edma_cfg(struct ata_port *ap, int want_ncq)

/* set up non-NCQ EDMA configuration */
cfg = EDMA_CFG_Q_DEPTH; /* always 0x1f for *all* chips */
+ pp->pp_flags &= ~MV_PP_FLAG_FBS_EN;

if (IS_GEN_I(hpriv))
cfg |= (1 << 8); /* enab config burst size mask */

- else if (IS_GEN_II(hpriv))
+ else if (IS_GEN_II(hpriv)) {
cfg |= EDMA_CFG_RD_BRST_EXT | EDMA_CFG_WR_BUFF_LEN;
+ mv_60x1_errata_sata25(ap, want_ncq);

- else if (IS_GEN_IIE(hpriv)) {
- cfg |= (1 << 23); /* do not mask PM field in rx'd FIS */
- cfg |= (1 << 22); /* enab 4-entry host queue cache */
- cfg |= (1 << 18); /* enab early completion */
- cfg |= (1 << 17); /* enab cut-through (dis stor&forwrd) */
+ } else if (IS_GEN_IIE(hpriv)) {
+ int want_fbs = sata_pmp_attached(ap);
+ /*
+ * Possible future enhancement:
+ *
+ * The chip can use FBS with non-NCQ, if we allow it,
+ * But first we need to have the error handling in place
+ * for this mode (datasheet section 7.3.15.4.2.3).
+ * So disallow non-NCQ FBS for now.
+ */
+ want_fbs &= want_ncq;
+
+ mv_config_fbs(port_mmio, want_ncq, want_fbs);

- if (want_ncq && sata_pmp_attached(ap)) {
+ if (want_fbs) {
+ pp->pp_flags |= MV_PP_FLAG_FBS_EN;
cfg |= EDMA_CFG_EDMA_FBS; /* FIS-based switching */
- mv_config_fbs(port_mmio, 1);
- } else {
- mv_config_fbs(port_mmio, 0);
}
+
+ cfg |= (1 << 23); /* do not mask PM field in rx'd FIS */
+ cfg |= (1 << 22); /* enab 4-entry host queue cache */
+ if (HAS_PCI(ap->host))
+ cfg |= (1 << 18); /* enab early completion */
+ if (hpriv->hp_flags & MV_HP_CUT_THROUGH)
+ cfg |= (1 << 17); /* enab cut-thru (dis stor&forwrd) */
}

if (want_ncq) {
@@ -1483,25 +1611,186 @@ static struct ata_queued_cmd *mv_get_active_qc(struct ata_port *ap)
return qc;
}

-static void mv_unexpected_intr(struct ata_port *ap)
+static void mv_pmp_error_handler(struct ata_port *ap)
{
+ unsigned int pmp, pmp_map;
struct mv_port_priv *pp = ap->private_data;
- struct ata_eh_info *ehi = &ap->link.eh_info;
- char *when = "";

+ if (pp->pp_flags & MV_PP_FLAG_DELAYED_EH) {
+ /*
+ * Perform NCQ error analysis on failed PMPs
+ * before we freeze the port entirely.
+ *
+ * The failed PMPs are marked earlier by mv_pmp_eh_prep().
+ */
+ pmp_map = pp->delayed_eh_pmp_map;
+ pp->pp_flags &= ~MV_PP_FLAG_DELAYED_EH;
+ for (pmp = 0; pmp_map != 0; pmp++) {
+ unsigned int this_pmp = (1 << pmp);
+ if (pmp_map & this_pmp) {
+ struct ata_link *link = &ap->pmp_link[pmp];
+ pmp_map &= ~this_pmp;
+ ata_eh_analyze_ncq_error(link);
+ }
+ }
+ ata_port_freeze(ap);
+ }
+ sata_pmp_error_handler(ap);
+}
+
+static unsigned int mv_get_err_pmp_map(struct ata_port *ap)
+{
+ void __iomem *port_mmio = mv_ap_base(ap);
+
+ return readl(port_mmio + SATA_TESTCTL_OFS) >> 16;
+}
+
+static void mv_pmp_eh_prep(struct ata_port *ap, unsigned int pmp_map)
+{
+ struct ata_eh_info *ehi;
+ unsigned int pmp;
+
+ /*
+ * Initialize EH info for PMPs which saw device errors
+ */
+ ehi = &ap->link.eh_info;
+ for (pmp = 0; pmp_map != 0; pmp++) {
+ unsigned int this_pmp = (1 << pmp);
+ if (pmp_map & this_pmp) {
+ struct ata_link *link = &ap->pmp_link[pmp];
+
+ pmp_map &= ~this_pmp;
+ ehi = &link->eh_info;
+ ata_ehi_clear_desc(ehi);
+ ata_ehi_push_desc(ehi, "dev err");
+ ehi->err_mask |= AC_ERR_DEV;
+ ehi->action |= ATA_EH_RESET;
+ ata_link_abort(link);
+ }
+ }
+}
+
+static int mv_handle_fbs_ncq_dev_err(struct ata_port *ap)
+{
+ struct mv_port_priv *pp = ap->private_data;
+ int failed_links;
+ unsigned int old_map, new_map;
+
+ /*
+ * Device error during FBS+NCQ operation:
+ *
+ * Set a port flag to prevent further I/O being enqueued.
+ * Leave the EDMA running to drain outstanding commands from this port.
+ * Perform the post-mortem/EH only when all responses are complete.
+ * Follow recovery sequence from 6042/7042 datasheet (7.3.15.4.2.2).
+ */
+ if (!(pp->pp_flags & MV_PP_FLAG_DELAYED_EH)) {
+ pp->pp_flags |= MV_PP_FLAG_DELAYED_EH;
+ pp->delayed_eh_pmp_map = 0;
+ }
+ old_map = pp->delayed_eh_pmp_map;
+ new_map = old_map | mv_get_err_pmp_map(ap);
+
+ if (old_map != new_map) {
+ pp->delayed_eh_pmp_map = new_map;
+ mv_pmp_eh_prep(ap, new_map & ~old_map);
+ }
+ failed_links = hweight16(new_map);
+
+ ata_port_printk(ap, KERN_INFO, "%s: pmp_map=%04x qc_map=%04x "
+ "failed_links=%d nr_active_links=%d\n",
+ __func__, pp->delayed_eh_pmp_map,
+ ap->qc_active, failed_links,
+ ap->nr_active_links);
+
+ if (ap->nr_active_links <= failed_links) {
+ mv_process_crpb_entries(ap, pp);
+ mv_stop_edma(ap);
+ mv_eh_freeze(ap);
+ ata_port_printk(ap, KERN_INFO, "%s: done\n", __func__);
+ return 1; /* handled */
+ }
+ ata_port_printk(ap, KERN_INFO, "%s: waiting\n", __func__);
+ return 1; /* handled */
+}
+
+static int mv_handle_fbs_non_ncq_dev_err(struct ata_port *ap)
+{
/*
- * We got a device interrupt from something that
- * was supposed to be using EDMA or polling.
+ * Possible future enhancement:
+ *
+ * FBS+non-NCQ operation is not yet implemented.
+ * See related notes in mv_edma_cfg().
+ *
+ * Device error during FBS+non-NCQ operation:
+ *
+ * We need to snapshot the shadow registers for each failed command.
+ * Follow recovery sequence from 6042/7042 datasheet (7.3.15.4.2.3).
*/
+ return 0; /* not handled */
+}
+
+static int mv_handle_dev_err(struct ata_port *ap, u32 edma_err_cause)
+{
+ struct mv_port_priv *pp = ap->private_data;
+
+ if (!(pp->pp_flags & MV_PP_FLAG_EDMA_EN))
+ return 0; /* EDMA was not active: not handled */
+ if (!(pp->pp_flags & MV_PP_FLAG_FBS_EN))
+ return 0; /* FBS was not active: not handled */
+
+ if (!(edma_err_cause & EDMA_ERR_DEV))
+ return 0; /* non DEV error: not handled */
+ edma_err_cause &= ~EDMA_ERR_IRQ_TRANSIENT;
+ if (edma_err_cause & ~(EDMA_ERR_DEV | EDMA_ERR_SELF_DIS))
+ return 0; /* other problems: not handled */
+
+ if (pp->pp_flags & MV_PP_FLAG_NCQ_EN) {
+ /*
+ * EDMA should NOT have self-disabled for this case.
+ * If it did, then something is wrong elsewhere,
+ * and we cannot handle it here.
+ */
+ if (edma_err_cause & EDMA_ERR_SELF_DIS) {
+ ata_port_printk(ap, KERN_WARNING,
+ "%s: err_cause=0x%x pp_flags=0x%x\n",
+ __func__, edma_err_cause, pp->pp_flags);
+ return 0; /* not handled */
+ }
+ return mv_handle_fbs_ncq_dev_err(ap);
+ } else {
+ /*
+ * EDMA should have self-disabled for this case.
+ * If it did not, then something is wrong elsewhere,
+ * and we cannot handle it here.
+ */
+ if (!(edma_err_cause & EDMA_ERR_SELF_DIS)) {
+ ata_port_printk(ap, KERN_WARNING,
+ "%s: err_cause=0x%x pp_flags=0x%x\n",
+ __func__, edma_err_cause, pp->pp_flags);
+ return 0; /* not handled */
+ }
+ return mv_handle_fbs_non_ncq_dev_err(ap);
+ }
+ return 0; /* not handled */
+}
+
+static void mv_unexpected_intr(struct ata_port *ap, int edma_was_enabled)
+{
+ struct ata_eh_info *ehi = &ap->link.eh_info;
+ char *when = "idle";
+
ata_ehi_clear_desc(ehi);
- if (pp->pp_flags & MV_PP_FLAG_EDMA_EN) {
- when = " while EDMA enabled";
+ if (!ap || (ap->flags & ATA_FLAG_DISABLED)) {
+ when = "disabled";
+ } else if (edma_was_enabled) {
+ when = "EDMA enabled";
} else {
struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->link.active_tag);
if (qc && (qc->tf.flags & ATA_TFLAG_POLLING))
- when = " while polling";
+ when = "polling";
}
- ata_ehi_push_desc(ehi, "unexpected device interrupt%s", when);
+ ata_ehi_push_desc(ehi, "unexpected device interrupt while %s", when);
ehi->err_mask |= AC_ERR_OTHER;
ehi->action |= ATA_EH_RESET;
ata_port_freeze(ap);
@@ -1519,7 +1808,7 @@ static void mv_unexpected_intr(struct ata_port *ap)
* LOCKING:
* Inherited from caller.
*/
-static void mv_err_intr(struct ata_port *ap, struct ata_queued_cmd *qc)
+static void mv_err_intr(struct ata_port *ap)
{
void __iomem *port_mmio = mv_ap_base(ap);
u32 edma_err_cause, eh_freeze_mask, serr = 0;
@@ -1527,24 +1816,42 @@ static void mv_err_intr(struct ata_port *ap, struct ata_queued_cmd *qc)
struct mv_host_priv *hpriv = ap->host->private_data;
unsigned int action = 0, err_mask = 0;
struct ata_eh_info *ehi = &ap->link.eh_info;
-
- ata_ehi_clear_desc(ehi);
+ struct ata_queued_cmd *qc;
+ int abort = 0;

/*
- * Read and clear the err_cause bits. This won't actually
- * clear for some errors (eg. SError), but we will be doing
- * a hard reset in those cases regardless, which *will* clear it.
+ * Read and clear the SError and err_cause bits.
*/
+ sata_scr_read(&ap->link, SCR_ERROR, &serr);
+ sata_scr_write_flush(&ap->link, SCR_ERROR, serr);
+
edma_err_cause = readl(port_mmio + EDMA_ERR_IRQ_CAUSE_OFS);
writelfl(~edma_err_cause, port_mmio + EDMA_ERR_IRQ_CAUSE_OFS);

- ata_ehi_push_desc(ehi, "edma_err_cause=%08x", edma_err_cause);
+ ata_port_printk(ap, KERN_INFO, "%s: err_cause=%08x pp_flags=0x%x\n",
+ __func__, edma_err_cause, pp->pp_flags);
+
+ if (edma_err_cause & EDMA_ERR_DEV) {
+ /*
+ * Device errors during FIS-based switching operation
+ * require special handling.
+ */
+ if (mv_handle_dev_err(ap, edma_err_cause))
+ return;
+ }

+ qc = mv_get_active_qc(ap);
+ ata_ehi_clear_desc(ehi);
+ ata_ehi_push_desc(ehi, "edma_err_cause=%08x pp_flags=%08x",
+ edma_err_cause, pp->pp_flags);
/*
* All generations share these EDMA error cause bits:
*/
- if (edma_err_cause & EDMA_ERR_DEV)
+ if (edma_err_cause & EDMA_ERR_DEV) {
err_mask |= AC_ERR_DEV;
+ action |= ATA_EH_RESET;
+ ata_ehi_push_desc(ehi, "dev error");
+ }
if (edma_err_cause & (EDMA_ERR_D_PAR | EDMA_ERR_PRD_PAR |
EDMA_ERR_CRQB_PAR | EDMA_ERR_CRPB_PAR |
EDMA_ERR_INTRL_PAR)) {
@@ -1576,13 +1883,6 @@ static void mv_err_intr(struct ata_port *ap, struct ata_queued_cmd *qc)
ata_ehi_push_desc(ehi, "EDMA self-disable");
}
if (edma_err_cause & EDMA_ERR_SERR) {
- /*
- * Ensure that we read our own SCR, not a pmp link SCR:
- */
- ap->ops->scr_read(ap, SCR_ERROR, &serr);
- /*
- * Don't clear SError here; leave it for libata-eh:
- */
ata_ehi_push_desc(ehi, "SError=%08x", serr);
err_mask |= AC_ERR_ATA_BUS;
action |= ATA_EH_RESET;
@@ -1602,10 +1902,29 @@ static void mv_err_intr(struct ata_port *ap, struct ata_queued_cmd *qc)
else
ehi->err_mask |= err_mask;

- if (edma_err_cause & eh_freeze_mask)
+ if (err_mask == AC_ERR_DEV) {
+ /*
+ * Cannot do ata_port_freeze() here,
+ * because it would kill PIO access,
+ * which is needed for further diagnosis.
+ */
+ mv_eh_freeze(ap);
+ abort = 1;
+ } else if (edma_err_cause & eh_freeze_mask) {
+ /*
+ * Note to self: ata_port_freeze() calls ata_port_abort()
+ */
ata_port_freeze(ap);
- else
- ata_port_abort(ap);
+ } else {
+ abort = 1;
+ }
+
+ if (abort) {
+ if (qc)
+ ata_link_abort(qc->dev->link);
+ else
+ ata_port_abort(ap);
+ }
}

static void mv_process_crpb_response(struct ata_port *ap,
@@ -1632,8 +1951,9 @@ static void mv_process_crpb_response(struct ata_port *ap,
}
}
ata_status = edma_status >> CRPB_FLAG_STATUS_SHIFT;
- qc->err_mask |= ac_err_mask(ata_status);
- ata_qc_complete(qc);
+ if (!ac_err_mask(ata_status))
+ ata_qc_complete(qc);
+ /* else: leave it for mv_err_intr() */
} else {
ata_port_printk(ap, KERN_ERR, "%s: no qc for tag=%d\n",
__func__, tag);
@@ -1677,6 +1997,44 @@ static void mv_process_crpb_entries(struct ata_port *ap, struct mv_port_priv *pp
port_mmio + EDMA_RSP_Q_OUT_PTR_OFS);
}

+static void mv_port_intr(struct ata_port *ap, u32 port_cause)
+{
+ struct mv_port_priv *pp;
+ int edma_was_enabled;
+
+ if (!ap || (ap->flags & ATA_FLAG_DISABLED)) {
+ mv_unexpected_intr(ap, 0);
+ return;
+ }
+ /*
+ * Grab a snapshot of the EDMA_EN flag setting,
+ * so that we have a consistent view for this port,
+ * even if something we call of our routines changes it.
+ */
+ pp = ap->private_data;
+ edma_was_enabled = (pp->pp_flags & MV_PP_FLAG_EDMA_EN);
+ /*
+ * Process completed CRPB response(s) before other events.
+ */
+ if (edma_was_enabled && (port_cause & DONE_IRQ)) {
+ mv_process_crpb_entries(ap, pp);
+ if (pp->pp_flags & MV_PP_FLAG_DELAYED_EH)
+ mv_handle_fbs_ncq_dev_err(ap);
+ }
+ /*
+ * Handle chip-reported errors, or continue on to handle PIO.
+ */
+ if (unlikely(port_cause & ERR_IRQ)) {
+ mv_err_intr(ap);
+ } else if (!edma_was_enabled) {
+ struct ata_queued_cmd *qc = mv_get_active_qc(ap);
+ if (qc)
+ ata_sff_host_intr(ap, qc);
+ else
+ mv_unexpected_intr(ap, edma_was_enabled);
+ }
+}
+
/**
* mv_host_intr - Handle all interrupts on the given host controller
* @host: host specific structure
@@ -1688,66 +2046,58 @@ static void mv_process_crpb_entries(struct ata_port *ap, struct mv_port_priv *pp
static int mv_host_intr(struct ata_host *host, u32 main_irq_cause)
{
struct mv_host_priv *hpriv = host->private_data;
- void __iomem *mmio = hpriv->base, *hc_mmio = NULL;
- u32 hc_irq_cause = 0;
+ void __iomem *mmio = hpriv->base, *hc_mmio;
unsigned int handled = 0, port;

for (port = 0; port < hpriv->n_ports; port++) {
struct ata_port *ap = host->ports[port];
- struct mv_port_priv *pp;
- unsigned int shift, hardport, port_cause;
- /*
- * When we move to the second hc, flag our cached
- * copies of hc_mmio (and hc_irq_cause) as invalid again.
- */
- if (port == MV_PORTS_PER_HC)
- hc_mmio = NULL;
- /*
- * Do nothing if port is not interrupting or is disabled:
- */
+ unsigned int p, shift, hardport, port_cause;
+
MV_PORT_TO_SHIFT_AND_HARDPORT(port, shift, hardport);
- port_cause = (main_irq_cause >> shift) & (DONE_IRQ | ERR_IRQ);
- if (!port_cause || !ap || (ap->flags & ATA_FLAG_DISABLED))
- continue;
/*
- * Each hc within the host has its own hc_irq_cause register.
- * We defer reading it until we know we need it, right now:
- *
- * FIXME later: we don't really need to read this register
- * (some logic changes required below if we go that way),
- * because it doesn't tell us anything new. But we do need
- * to write to it, outside the top of this loop,
- * to reset the interrupt triggers for next time.
+ * Each hc within the host has its own hc_irq_cause register,
+ * where the interrupting ports bits get ack'd.
*/
- if (!hc_mmio) {
+ if (hardport == 0) { /* first port on this hc ? */
+ u32 hc_cause = (main_irq_cause >> shift) & HC0_IRQ_PEND;
+ u32 port_mask, ack_irqs;
+ /*
+ * Skip this entire hc if nothing pending for any ports
+ */
+ if (!hc_cause) {
+ port += MV_PORTS_PER_HC - 1;
+ continue;
+ }
+ /*
+ * We don't need/want to read the hc_irq_cause register,
+ * because doing so hurts performance, and
+ * main_irq_cause already gives us everything we need.
+ *
+ * But we do have to *write* to the hc_irq_cause to ack
+ * the ports that we are handling this time through.
+ *
+ * This requires that we create a bitmap for those
+ * ports which interrupted us, and use that bitmap
+ * to ack (only) those ports via hc_irq_cause.
+ */
+ ack_irqs = 0;
+ for (p = 0; p < MV_PORTS_PER_HC; ++p) {
+ if ((port + p) >= hpriv->n_ports)
+ break;
+ port_mask = (DONE_IRQ | ERR_IRQ) << (p * 2);
+ if (hc_cause & port_mask)
+ ack_irqs |= (DMA_IRQ | DEV_IRQ) << p;
+ }
hc_mmio = mv_hc_base_from_port(mmio, port);
- hc_irq_cause = readl(hc_mmio + HC_IRQ_CAUSE_OFS);
- writelfl(~hc_irq_cause, hc_mmio + HC_IRQ_CAUSE_OFS);
+ writelfl(~ack_irqs, hc_mmio + HC_IRQ_CAUSE_OFS);
handled = 1;
}
/*
- * Process completed CRPB response(s) before other events.
- */
- pp = ap->private_data;
- if (hc_irq_cause & (DMA_IRQ << hardport)) {
- if (pp->pp_flags & MV_PP_FLAG_EDMA_EN)
- mv_process_crpb_entries(ap, pp);
- }
- /*
- * Handle chip-reported errors, or continue on to handle PIO.
+ * Handle interrupts signalled for this port:
*/
- if (unlikely(port_cause & ERR_IRQ)) {
- mv_err_intr(ap, mv_get_active_qc(ap));
- } else if (hc_irq_cause & (DEV_IRQ << hardport)) {
- if (!(pp->pp_flags & MV_PP_FLAG_EDMA_EN)) {
- struct ata_queued_cmd *qc = mv_get_active_qc(ap);
- if (qc) {
- ata_sff_host_intr(ap, qc);
- continue;
- }
- }
- mv_unexpected_intr(ap);
- }
+ port_cause = (main_irq_cause >> shift) & (DONE_IRQ | ERR_IRQ);
+ if (port_cause)
+ mv_port_intr(ap, port_cause);
}
return handled;
}
@@ -1894,7 +2244,7 @@ static void mv5_reset_bus(struct ata_host *host, void __iomem *mmio)

static void mv5_reset_flash(struct mv_host_priv *hpriv, void __iomem *mmio)
{
- writel(0x0fcfffff, mmio + MV_FLASH_CTL);
+ writel(0x0fcfffff, mmio + MV_FLASH_CTL_OFS);
}

static void mv5_read_preamp(struct mv_host_priv *hpriv, int idx,
@@ -1913,7 +2263,7 @@ static void mv5_enable_leds(struct mv_host_priv *hpriv, void __iomem *mmio)
{
u32 tmp;

- writel(0, mmio + MV_GPIO_PORT_CTL);
+ writel(0, mmio + MV_GPIO_PORT_CTL_OFS);

/* FIXME: handle MV_HP_ERRATA_50XXB2 errata */

@@ -1931,14 +2281,14 @@ static void mv5_phy_errata(struct mv_host_priv *hpriv, void __iomem *mmio,
int fix_apm_sq = (hpriv->hp_flags & MV_HP_ERRATA_50XXB0);

if (fix_apm_sq) {
- tmp = readl(phy_mmio + MV5_LT_MODE);
+ tmp = readl(phy_mmio + MV5_LTMODE_OFS);
tmp |= (1 << 19);
- writel(tmp, phy_mmio + MV5_LT_MODE);
+ writel(tmp, phy_mmio + MV5_LTMODE_OFS);

- tmp = readl(phy_mmio + MV5_PHY_CTL);
+ tmp = readl(phy_mmio + MV5_PHY_CTL_OFS);
tmp &= ~0x3;
tmp |= 0x1;
- writel(tmp, phy_mmio + MV5_PHY_CTL);
+ writel(tmp, phy_mmio + MV5_PHY_CTL_OFS);
}

tmp = readl(phy_mmio + MV5_PHY_MODE);
@@ -1956,11 +2306,6 @@ static void mv5_reset_hc_port(struct mv_host_priv *hpriv, void __iomem *mmio,
{
void __iomem *port_mmio = mv_port_base(mmio, port);

- /*
- * The datasheet warns against setting ATA_RST when EDMA is active
- * (but doesn't say what the problem might be). So we first try
- * to disable the EDMA engine before doing the ATA_RST operation.
- */
mv_reset_channel(hpriv, mmio, port);

ZERO(0x028); /* command */
@@ -1975,7 +2320,7 @@ static void mv5_reset_hc_port(struct mv_host_priv *hpriv, void __iomem *mmio,
ZERO(0x024); /* respq outp */
ZERO(0x020); /* respq inp */
ZERO(0x02c); /* test control */
- writel(0xbc, port_mmio + EDMA_IORDY_TMOUT);
+ writel(0xbc, port_mmio + EDMA_IORDY_TMOUT_OFS);
}
#undef ZERO

@@ -2021,13 +2366,13 @@ static void mv_reset_pci_bus(struct ata_host *host, void __iomem *mmio)
struct mv_host_priv *hpriv = host->private_data;
u32 tmp;

- tmp = readl(mmio + MV_PCI_MODE);
+ tmp = readl(mmio + MV_PCI_MODE_OFS);
tmp &= 0xff00ffff;
- writel(tmp, mmio + MV_PCI_MODE);
+ writel(tmp, mmio + MV_PCI_MODE_OFS);

ZERO(MV_PCI_DISC_TIMER);
ZERO(MV_PCI_MSI_TRIGGER);
- writel(0x000100ff, mmio + MV_PCI_XBAR_TMOUT);
+ writel(0x000100ff, mmio + MV_PCI_XBAR_TMOUT_OFS);
ZERO(PCI_HC_MAIN_IRQ_MASK_OFS);
ZERO(MV_PCI_SERR_MASK);
ZERO(hpriv->irq_cause_ofs);
@@ -2045,10 +2390,10 @@ static void mv6_reset_flash(struct mv_host_priv *hpriv, void __iomem *mmio)

mv5_reset_flash(hpriv, mmio);

- tmp = readl(mmio + MV_GPIO_PORT_CTL);
+ tmp = readl(mmio + MV_GPIO_PORT_CTL_OFS);
tmp &= 0x3;
tmp |= (1 << 5) | (1 << 6);
- writel(tmp, mmio + MV_GPIO_PORT_CTL);
+ writel(tmp, mmio + MV_GPIO_PORT_CTL_OFS);
}

/**
@@ -2121,7 +2466,7 @@ static void mv6_read_preamp(struct mv_host_priv *hpriv, int idx,
void __iomem *port_mmio;
u32 tmp;

- tmp = readl(mmio + MV_RESET_CFG);
+ tmp = readl(mmio + MV_RESET_CFG_OFS);
if ((tmp & (1 << 0)) == 0) {
hpriv->signal[idx].amps = 0x7 << 8;
hpriv->signal[idx].pre = 0x1 << 5;
@@ -2137,7 +2482,7 @@ static void mv6_read_preamp(struct mv_host_priv *hpriv, int idx,

static void mv6_enable_leds(struct mv_host_priv *hpriv, void __iomem *mmio)
{
- writel(0x00000060, mmio + MV_GPIO_PORT_CTL);
+ writel(0x00000060, mmio + MV_GPIO_PORT_CTL_OFS);
}

static void mv6_phy_errata(struct mv_host_priv *hpriv, void __iomem *mmio,
@@ -2235,11 +2580,6 @@ static void mv_soc_reset_hc_port(struct mv_host_priv *hpriv,
{
void __iomem *port_mmio = mv_port_base(mmio, port);

- /*
- * The datasheet warns against setting ATA_RST when EDMA is active
- * (but doesn't say what the problem might be). So we first try
- * to disable the EDMA engine before doing the ATA_RST operation.
- */
mv_reset_channel(hpriv, mmio, port);

ZERO(0x028); /* command */
@@ -2254,7 +2594,7 @@ static void mv_soc_reset_hc_port(struct mv_host_priv *hpriv,
ZERO(0x024); /* respq outp */
ZERO(0x020); /* respq inp */
ZERO(0x02c); /* test control */
- writel(0xbc, port_mmio + EDMA_IORDY_TMOUT);
+ writel(0xbc, port_mmio + EDMA_IORDY_TMOUT_OFS);
}

#undef ZERO
@@ -2297,38 +2637,39 @@ static void mv_soc_reset_bus(struct ata_host *host, void __iomem *mmio)
return;
}

-static void mv_setup_ifctl(void __iomem *port_mmio, int want_gen2i)
+static void mv_setup_ifcfg(void __iomem *port_mmio, int want_gen2i)
{
- u32 ifctl = readl(port_mmio + SATA_INTERFACE_CFG);
+ u32 ifcfg = readl(port_mmio + SATA_INTERFACE_CFG_OFS);

- ifctl = (ifctl & 0xf7f) | 0x9b1000; /* from chip spec */
+ ifcfg = (ifcfg & 0xf7f) | 0x9b1000; /* from chip spec */
if (want_gen2i)
- ifctl |= (1 << 7); /* enable gen2i speed */
- writelfl(ifctl, port_mmio + SATA_INTERFACE_CFG);
+ ifcfg |= (1 << 7); /* enable gen2i speed */
+ writelfl(ifcfg, port_mmio + SATA_INTERFACE_CFG_OFS);
}

-/*
- * Caller must ensure that EDMA is not active,
- * by first doing mv_stop_edma() where needed.
- */
static void mv_reset_channel(struct mv_host_priv *hpriv, void __iomem *mmio,
unsigned int port_no)
{
void __iomem *port_mmio = mv_port_base(mmio, port_no);

+ /*
+ * The datasheet warns against setting EDMA_RESET when EDMA is active
+ * (but doesn't say what the problem might be). So we first try
+ * to disable the EDMA engine before doing the EDMA_RESET operation.
+ */
mv_stop_edma_engine(port_mmio);
- writelfl(ATA_RST, port_mmio + EDMA_CMD_OFS);
+ writelfl(EDMA_RESET, port_mmio + EDMA_CMD_OFS);

if (!IS_GEN_I(hpriv)) {
- /* Enable 3.0gb/s link speed */
- mv_setup_ifctl(port_mmio, 1);
+ /* Enable 3.0gb/s link speed: this survives EDMA_RESET */
+ mv_setup_ifcfg(port_mmio, 1);
}
/*
- * Strobing ATA_RST here causes a hard reset of the SATA transport,
+ * Strobing EDMA_RESET here causes a hard reset of the SATA transport,
* link, and physical layers. It resets all SATA interface registers
* (except for SATA_INTERFACE_CFG), and issues a COMRESET to the dev.
*/
- writelfl(ATA_RST, port_mmio + EDMA_CMD_OFS);
+ writelfl(EDMA_RESET, port_mmio + EDMA_CMD_OFS);
udelay(25); /* allow reset propagation */
writelfl(0, port_mmio + EDMA_CMD_OFS);

@@ -2392,7 +2733,7 @@ static int mv_hardreset(struct ata_link *link, unsigned int *class,
sata_scr_read(link, SCR_STATUS, &sstatus);
if (!IS_GEN_I(hpriv) && ++attempts >= 5 && sstatus == 0x121) {
/* Force 1.5gb/s link speed and try again */
- mv_setup_ifctl(mv_ap_base(ap), 0);
+ mv_setup_ifcfg(mv_ap_base(ap), 0);
if (time_after(jiffies + HZ, deadline))
extra = HZ; /* only extend it once, max */
}
@@ -2493,6 +2834,34 @@ static void mv_port_init(struct ata_ioports *port, void __iomem *port_mmio)
readl(port_mmio + EDMA_ERR_IRQ_MASK_OFS));
}

+static unsigned int mv_in_pcix_mode(struct ata_host *host)
+{
+ struct mv_host_priv *hpriv = host->private_data;
+ void __iomem *mmio = hpriv->base;
+ u32 reg;
+
+ if (!HAS_PCI(host) || !IS_PCIE(hpriv))
+ return 0; /* not PCI-X capable */
+ reg = readl(mmio + MV_PCI_MODE_OFS);
+ if ((reg & MV_PCI_MODE_MASK) == 0)
+ return 0; /* conventional PCI mode */
+ return 1; /* chip is in PCI-X mode */
+}
+
+static int mv_pci_cut_through_okay(struct ata_host *host)
+{
+ struct mv_host_priv *hpriv = host->private_data;
+ void __iomem *mmio = hpriv->base;
+ u32 reg;
+
+ if (!mv_in_pcix_mode(host)) {
+ reg = readl(mmio + PCI_COMMAND_OFS);
+ if (reg & PCI_COMMAND_MRDTRIG)
+ return 0; /* not okay */
+ }
+ return 1; /* okay */
+}
+
static int mv_chip_id(struct ata_host *host, unsigned int board_idx)
{
struct pci_dev *pdev = to_pci_dev(host->dev);
@@ -2560,7 +2929,7 @@ static int mv_chip_id(struct ata_host *host, unsigned int board_idx)
break;

case chip_7042:
- hp_flags |= MV_HP_PCIE;
+ hp_flags |= MV_HP_PCIE | MV_HP_CUT_THROUGH;
if (pdev->vendor == PCI_VENDOR_ID_TTI &&
(pdev->device == 0x2300 || pdev->device == 0x2310))
{
@@ -2590,9 +2959,12 @@ static int mv_chip_id(struct ata_host *host, unsigned int board_idx)
" and avoid the final two gigabytes on"
" all RocketRAID BIOS initialized drives.\n");
}
+ /* drop through */
case chip_6042:
hpriv->ops = &mv6xxx_ops;
hp_flags |= MV_HP_GEN_IIE;
+ if (board_idx == chip_6042 && mv_pci_cut_through_okay(host))
+ hp_flags |= MV_HP_CUT_THROUGH;

switch (pdev->revision) {
case 0x0:
diff --git a/include/linux/libata.h b/include/linux/libata.h
index d1dfe87..7e206da 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -1039,6 +1039,7 @@ extern void ata_eh_thaw_port(struct ata_port *ap);

extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
+extern void ata_eh_analyze_ncq_error(struct ata_link *link);

extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
@@ -1381,6 +1382,21 @@ static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
return *(struct ata_port **)&host->hostdata[0];
}

+static inline int ata_check_ready(u8 status)
+{
+ /* Some controllers report 0x77 or 0x7f during intermediate
+ * not-ready stages.
+ */
+ if (status == 0x77 || status == 0x7f)
+ return 0;
+
+ /* 0xff indicates either no device or device not ready */
+ if (status == 0xff)
+ return -ENODEV;
+
+ return !(status & ATA_BUSY);
+}
+

/**************************************************************************
* PMP - drivers/ata/libata-pmp.c