[GFS2] Fix up merge of Linus' kernel into GFS2

This fixes up a couple of conflicts when merging up with
Linus' latest kernel. This will hopefully allow GFS2 to
be more easily merged into forthcoming -mm and FC kernels
due to the "one line per header" format now used for the
kernel headers.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

Conflicts:

	include/linux/Kbuild
	include/linux/kernel.h

1 files changed, 502 insertions, 0 deletions

diff --git a/drivers/ata/sata_via.c b/drivers/ata/sata_via.c
new file mode 100644
index 000000000000..7f087aef99de
--- /dev/null
+++ b/drivers/ata/sata_via.c
@@ -0,0 +1,502 @@
+/*
+ *  sata_via.c - VIA Serial ATA controllers
+ *
+ *  Maintained by:  Jeff Garzik <jgarzik@pobox.com>
+ * 		   Please ALWAYS copy linux-ide@vger.kernel.org
+ 		   on emails.
+ *
+ *  Copyright 2003-2004 Red Hat, Inc.  All rights reserved.
+ *  Copyright 2003-2004 Jeff Garzik
+ *
+ *
+ *  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 Free Software Foundation; either version 2, or (at your option)
+ *  any later version.
+ *
+ *  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.
+ *
+ *
+ *  libata documentation is available via 'make {ps|pdf}docs',
+ *  as Documentation/DocBook/libata.*
+ *
+ *  Hardware documentation available under NDA.
+ *
+ *
+ *  To-do list:
+ *  - VT6421 PATA support
+ *
+ */
+
+#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 <asm/io.h>
+
+#define DRV_NAME	"sata_via"
+#define DRV_VERSION	"2.0"
+
+enum board_ids_enum {
+	vt6420,
+	vt6421,
+};
+
+enum {
+	SATA_CHAN_ENAB		= 0x40, /* SATA channel enable */
+	SATA_INT_GATE		= 0x41, /* SATA interrupt gating */
+	SATA_NATIVE_MODE	= 0x42, /* Native mode enable */
+	SATA_PATA_SHARING	= 0x49, /* PATA/SATA sharing func ctrl */
+
+	PORT0			= (1 << 1),
+	PORT1			= (1 << 0),
+	ALL_PORTS		= PORT0 | PORT1,
+	N_PORTS			= 2,
+
+	NATIVE_MODE_ALL		= (1 << 7) | (1 << 6) | (1 << 5) | (1 << 4),
+
+	SATA_EXT_PHY		= (1 << 6), /* 0==use PATA, 1==ext phy */
+	SATA_2DEV		= (1 << 5), /* SATA is master/slave */
+};
+
+static int svia_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
+static u32 svia_scr_read (struct ata_port *ap, unsigned int sc_reg);
+static void svia_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
+static void vt6420_error_handler(struct ata_port *ap);
+
+static const struct pci_device_id svia_pci_tbl[] = {
+	{ 0x1106, 0x0591, PCI_ANY_ID, PCI_ANY_ID, 0, 0, vt6420 },
+	{ 0x1106, 0x3149, PCI_ANY_ID, PCI_ANY_ID, 0, 0, vt6420 },
+	{ 0x1106, 0x3249, PCI_ANY_ID, PCI_ANY_ID, 0, 0, vt6421 },
+
+	{ }	/* terminate list */
+};
+
+static struct pci_driver svia_pci_driver = {
+	.name			= DRV_NAME,
+	.id_table		= svia_pci_tbl,
+	.probe			= svia_init_one,
+	.remove			= ata_pci_remove_one,
+};
+
+static struct scsi_host_template svia_sht = {
+	.module			= THIS_MODULE,
+	.name			= DRV_NAME,
+	.ioctl			= ata_scsi_ioctl,
+	.queuecommand		= ata_scsi_queuecmd,
+	.can_queue		= ATA_DEF_QUEUE,
+	.this_id		= ATA_SHT_THIS_ID,
+	.sg_tablesize		= LIBATA_MAX_PRD,
+	.cmd_per_lun		= ATA_SHT_CMD_PER_LUN,
+	.emulated		= ATA_SHT_EMULATED,
+	.use_clustering		= ATA_SHT_USE_CLUSTERING,
+	.proc_name		= DRV_NAME,
+	.dma_boundary		= ATA_DMA_BOUNDARY,
+	.slave_configure	= ata_scsi_slave_config,
+	.slave_destroy		= ata_scsi_slave_destroy,
+	.bios_param		= ata_std_bios_param,
+};
+
+static const struct ata_port_operations vt6420_sata_ops = {
+	.port_disable		= ata_port_disable,
+
+	.tf_load		= ata_tf_load,
+	.tf_read		= ata_tf_read,
+	.check_status		= ata_check_status,
+	.exec_command		= ata_exec_command,
+	.dev_select		= ata_std_dev_select,
+
+	.bmdma_setup            = ata_bmdma_setup,
+	.bmdma_start            = ata_bmdma_start,
+	.bmdma_stop		= ata_bmdma_stop,
+	.bmdma_status		= ata_bmdma_status,
+
+	.qc_prep		= ata_qc_prep,
+	.qc_issue		= ata_qc_issue_prot,
+	.data_xfer		= ata_pio_data_xfer,
+
+	.freeze			= ata_bmdma_freeze,
+	.thaw			= ata_bmdma_thaw,
+	.error_handler		= vt6420_error_handler,
+	.post_internal_cmd	= ata_bmdma_post_internal_cmd,
+
+	.irq_handler		= ata_interrupt,
+	.irq_clear		= ata_bmdma_irq_clear,
+
+	.port_start		= ata_port_start,
+	.port_stop		= ata_port_stop,
+	.host_stop		= ata_host_stop,
+};
+
+static const struct ata_port_operations vt6421_sata_ops = {
+	.port_disable		= ata_port_disable,
+
+	.tf_load		= ata_tf_load,
+	.tf_read		= ata_tf_read,
+	.check_status		= ata_check_status,
+	.exec_command		= ata_exec_command,
+	.dev_select		= ata_std_dev_select,
+
+	.bmdma_setup            = ata_bmdma_setup,
+	.bmdma_start            = ata_bmdma_start,
+	.bmdma_stop		= ata_bmdma_stop,
+	.bmdma_status		= ata_bmdma_status,
+
+	.qc_prep		= ata_qc_prep,
+	.qc_issue		= ata_qc_issue_prot,
+	.data_xfer		= ata_pio_data_xfer,
+
+	.freeze			= ata_bmdma_freeze,
+	.thaw			= ata_bmdma_thaw,
+	.error_handler		= ata_bmdma_error_handler,
+	.post_internal_cmd	= ata_bmdma_post_internal_cmd,
+
+	.irq_handler		= ata_interrupt,
+	.irq_clear		= ata_bmdma_irq_clear,
+
+	.scr_read		= svia_scr_read,
+	.scr_write		= svia_scr_write,
+
+	.port_start		= ata_port_start,
+	.port_stop		= ata_port_stop,
+	.host_stop		= ata_host_stop,
+};
+
+static struct ata_port_info vt6420_port_info = {
+	.sht		= &svia_sht,
+	.flags		= ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY,
+	.pio_mask	= 0x1f,
+	.mwdma_mask	= 0x07,
+	.udma_mask	= 0x7f,
+	.port_ops	= &vt6420_sata_ops,
+};
+
+MODULE_AUTHOR("Jeff Garzik");
+MODULE_DESCRIPTION("SCSI low-level driver for VIA SATA controllers");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, svia_pci_tbl);
+MODULE_VERSION(DRV_VERSION);
+
+static u32 svia_scr_read (struct ata_port *ap, unsigned int sc_reg)
+{
+	if (sc_reg > SCR_CONTROL)
+		return 0xffffffffU;
+	return inl(ap->ioaddr.scr_addr + (4 * sc_reg));
+}
+
+static void svia_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
+{
+	if (sc_reg > SCR_CONTROL)
+		return;
+	outl(val, ap->ioaddr.scr_addr + (4 * sc_reg));
+}
+
+/**
+ *	vt6420_prereset - prereset for vt6420
+ *	@ap: target ATA port
+ *
+ *	SCR registers on vt6420 are pieces of shit and may hang the
+ *	whole machine completely if accessed with the wrong timing.
+ *	To avoid such catastrophe, vt6420 doesn't provide generic SCR
+ *	access operations, but uses SStatus and SControl only during
+ *	boot probing in controlled way.
+ *
+ *	As the old (pre EH update) probing code is proven to work, we
+ *	strictly follow the access pattern.
+ *
+ *	LOCKING:
+ *	Kernel thread context (may sleep)
+ *
+ *	RETURNS:
+ *	0 on success, -errno otherwise.
+ */
+static int vt6420_prereset(struct ata_port *ap)
+{
+	struct ata_eh_context *ehc = &ap->eh_context;
+	unsigned long timeout = jiffies + (HZ * 5);
+	u32 sstatus, scontrol;
+	int online;
+
+	/* don't do any SCR stuff if we're not loading */
+	if (!ATA_PFLAG_LOADING)
+		goto skip_scr;
+
+	/* Resume phy.  This is the old resume sequence from
+	 * __sata_phy_reset().
+	 */
+	svia_scr_write(ap, SCR_CONTROL, 0x300);
+	svia_scr_read(ap, SCR_CONTROL); /* flush */
+
+	/* wait for phy to become ready, if necessary */
+	do {
+		msleep(200);
+		if ((svia_scr_read(ap, SCR_STATUS) & 0xf) != 1)
+			break;
+	} while (time_before(jiffies, timeout));
+
+	/* open code sata_print_link_status() */
+	sstatus = svia_scr_read(ap, SCR_STATUS);
+	scontrol = svia_scr_read(ap, SCR_CONTROL);
+
+	online = (sstatus & 0xf) == 0x3;
+
+	ata_port_printk(ap, KERN_INFO,
+			"SATA link %s 1.5 Gbps (SStatus %X SControl %X)\n",
+			online ? "up" : "down", sstatus, scontrol);
+
+	/* SStatus is read one more time */
+	svia_scr_read(ap, SCR_STATUS);
+
+	if (!online) {
+		/* tell EH to bail */
+		ehc->i.action &= ~ATA_EH_RESET_MASK;
+		return 0;
+	}
+
+ skip_scr:
+	/* wait for !BSY */
+	ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
+
+	return 0;
+}
+
+static void vt6420_error_handler(struct ata_port *ap)
+{
+	return ata_bmdma_drive_eh(ap, vt6420_prereset, ata_std_softreset,
+				  NULL, ata_std_postreset);
+}
+
+static const unsigned int svia_bar_sizes[] = {
+	8, 4, 8, 4, 16, 256
+};
+
+static const unsigned int vt6421_bar_sizes[] = {
+	16, 16, 16, 16, 32, 128
+};
+
+static unsigned long svia_scr_addr(unsigned long addr, unsigned int port)
+{
+	return addr + (port * 128);
+}
+
+static unsigned long vt6421_scr_addr(unsigned long addr, unsigned int port)
+{
+	return addr + (port * 64);
+}
+
+static void vt6421_init_addrs(struct ata_probe_ent *probe_ent,
+			      struct pci_dev *pdev,
+			      unsigned int port)
+{
+	unsigned long reg_addr = pci_resource_start(pdev, port);
+	unsigned long bmdma_addr = pci_resource_start(pdev, 4) + (port * 8);
+	unsigned long scr_addr;
+
+	probe_ent->port[port].cmd_addr = reg_addr;
+	probe_ent->port[port].altstatus_addr =
+	probe_ent->port[port].ctl_addr = (reg_addr + 8) | ATA_PCI_CTL_OFS;
+	probe_ent->port[port].bmdma_addr = bmdma_addr;
+
+	scr_addr = vt6421_scr_addr(pci_resource_start(pdev, 5), port);
+	probe_ent->port[port].scr_addr = scr_addr;
+
+	ata_std_ports(&probe_ent->port[port]);
+}
+
+static struct ata_probe_ent *vt6420_init_probe_ent(struct pci_dev *pdev)
+{
+	struct ata_probe_ent *probe_ent;
+	struct ata_port_info *ppi = &vt6420_port_info;
+
+	probe_ent = ata_pci_init_native_mode(pdev, &ppi, ATA_PORT_PRIMARY | ATA_PORT_SECONDARY);
+	if (!probe_ent)
+		return NULL;
+
+	probe_ent->port[0].scr_addr =
+		svia_scr_addr(pci_resource_start(pdev, 5), 0);
+	probe_ent->port[1].scr_addr =
+		svia_scr_addr(pci_resource_start(pdev, 5), 1);
+
+	return probe_ent;
+}
+
+static struct ata_probe_ent *vt6421_init_probe_ent(struct pci_dev *pdev)
+{
+	struct ata_probe_ent *probe_ent;
+	unsigned int i;
+
+	probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
+	if (!probe_ent)
+		return NULL;
+
+	memset(probe_ent, 0, sizeof(*probe_ent));
+	probe_ent->dev = pci_dev_to_dev(pdev);
+	INIT_LIST_HEAD(&probe_ent->node);
+
+	probe_ent->sht		= &svia_sht;
+	probe_ent->port_flags	= ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY;
+	probe_ent->port_ops	= &vt6421_sata_ops;
+	probe_ent->n_ports	= N_PORTS;
+	probe_ent->irq		= pdev->irq;
+	probe_ent->irq_flags	= IRQF_SHARED;
+	probe_ent->pio_mask	= 0x1f;
+	probe_ent->mwdma_mask	= 0x07;
+	probe_ent->udma_mask	= 0x7f;
+
+	for (i = 0; i < N_PORTS; i++)
+		vt6421_init_addrs(probe_ent, pdev, i);
+
+	return probe_ent;
+}
+
+static void svia_configure(struct pci_dev *pdev)
+{
+	u8 tmp8;
+
+	pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &tmp8);
+	dev_printk(KERN_INFO, &pdev->dev, "routed to hard irq line %d\n",
+	       (int) (tmp8 & 0xf0) == 0xf0 ? 0 : tmp8 & 0x0f);
+
+	/* make sure SATA channels are enabled */
+	pci_read_config_byte(pdev, SATA_CHAN_ENAB, &tmp8);
+	if ((tmp8 & ALL_PORTS) != ALL_PORTS) {
+		dev_printk(KERN_DEBUG, &pdev->dev,
+			   "enabling SATA channels (0x%x)\n",
+		           (int) tmp8);
+		tmp8 |= ALL_PORTS;
+		pci_write_config_byte(pdev, SATA_CHAN_ENAB, tmp8);
+	}
+
+	/* make sure interrupts for each channel sent to us */
+	pci_read_config_byte(pdev, SATA_INT_GATE, &tmp8);
+	if ((tmp8 & ALL_PORTS) != ALL_PORTS) {
+		dev_printk(KERN_DEBUG, &pdev->dev,
+			   "enabling SATA channel interrupts (0x%x)\n",
+		           (int) tmp8);
+		tmp8 |= ALL_PORTS;
+		pci_write_config_byte(pdev, SATA_INT_GATE, tmp8);
+	}
+
+	/* make sure native mode is enabled */
+	pci_read_config_byte(pdev, SATA_NATIVE_MODE, &tmp8);
+	if ((tmp8 & NATIVE_MODE_ALL) != NATIVE_MODE_ALL) {
+		dev_printk(KERN_DEBUG, &pdev->dev,
+			   "enabling SATA channel native mode (0x%x)\n",
+		           (int) tmp8);
+		tmp8 |= NATIVE_MODE_ALL;
+		pci_write_config_byte(pdev, SATA_NATIVE_MODE, tmp8);
+	}
+}
+
+static int svia_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+	static int printed_version;
+	unsigned int i;
+	int rc;
+	struct ata_probe_ent *probe_ent;
+	int board_id = (int) ent->driver_data;
+	const int *bar_sizes;
+	int pci_dev_busy = 0;
+	u8 tmp8;
+
+	if (!printed_version++)
+		dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
+
+	rc = pci_enable_device(pdev);
+	if (rc)
+		return rc;
+
+	rc = pci_request_regions(pdev, DRV_NAME);
+	if (rc) {
+		pci_dev_busy = 1;
+		goto err_out;
+	}
+
+	if (board_id == vt6420) {
+		pci_read_config_byte(pdev, SATA_PATA_SHARING, &tmp8);
+		if (tmp8 & SATA_2DEV) {
+			dev_printk(KERN_ERR, &pdev->dev,
+				   "SATA master/slave not supported (0x%x)\n",
+		       		   (int) tmp8);
+			rc = -EIO;
+			goto err_out_regions;
+		}
+
+		bar_sizes = &svia_bar_sizes[0];
+	} else {
+		bar_sizes = &vt6421_bar_sizes[0];
+	}
+
+	for (i = 0; i < ARRAY_SIZE(svia_bar_sizes); i++)
+		if ((pci_resource_start(pdev, i) == 0) ||
+		    (pci_resource_len(pdev, i) < bar_sizes[i])) {
+			dev_printk(KERN_ERR, &pdev->dev,
+				"invalid PCI BAR %u (sz 0x%llx, val 0x%llx)\n",
+				i,
+			        (unsigned long long)pci_resource_start(pdev, i),
+			        (unsigned long long)pci_resource_len(pdev, i));
+			rc = -ENODEV;
+			goto err_out_regions;
+		}
+
+	rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
+	if (rc)
+		goto err_out_regions;
+	rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
+	if (rc)
+		goto err_out_regions;
+
+	if (board_id == vt6420)
+		probe_ent = vt6420_init_probe_ent(pdev);
+	else
+		probe_ent = vt6421_init_probe_ent(pdev);
+
+	if (!probe_ent) {
+		dev_printk(KERN_ERR, &pdev->dev, "out of memory\n");
+		rc = -ENOMEM;
+		goto err_out_regions;
+	}
+
+	svia_configure(pdev);
+
+	pci_set_master(pdev);
+
+	/* FIXME: check ata_device_add return value */
+	ata_device_add(probe_ent);
+	kfree(probe_ent);
+
+	return 0;
+
+err_out_regions:
+	pci_release_regions(pdev);
+err_out:
+	if (!pci_dev_busy)
+		pci_disable_device(pdev);
+	return rc;
+}
+
+static int __init svia_init(void)
+{
+	return pci_register_driver(&svia_pci_driver);
+}
+
+static void __exit svia_exit(void)
+{
+	pci_unregister_driver(&svia_pci_driver);
+}
+
+module_init(svia_init);
+module_exit(svia_exit);
+