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linux-next/drivers/ata/pata_atp867x.c
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00

589 lines
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/*
* pata_atp867x.c - ARTOP 867X 64bit 4-channel UDMA133 ATA controller driver
*
* (C) 2009 Google Inc. John(Jung-Ik) Lee <jilee@google.com>
*
* Per Atp867 data sheet rev 1.2, Acard.
* Based in part on early ide code from
* 2003-2004 by Eric Uhrhane, Google, 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 Free Software Foundation; either version 2 of the License, 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; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*
* TODO:
* 1. RAID features [comparison, XOR, striping, mirroring, etc.]
*/
#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 <linux/gfp.h>
#include <scsi/scsi_host.h>
#include <linux/libata.h>
#define DRV_NAME "pata_atp867x"
#define DRV_VERSION "0.7.5"
/*
* IO Registers
* Note that all runtime hot priv ports are cached in ap private_data
*/
enum {
ATP867X_IO_CHANNEL_OFFSET = 0x10,
/*
* IO Register Bitfields
*/
ATP867X_IO_PIOSPD_ACTIVE_SHIFT = 4,
ATP867X_IO_PIOSPD_RECOVER_SHIFT = 0,
ATP867X_IO_DMAMODE_MSTR_SHIFT = 0,
ATP867X_IO_DMAMODE_MSTR_MASK = 0x07,
ATP867X_IO_DMAMODE_SLAVE_SHIFT = 4,
ATP867X_IO_DMAMODE_SLAVE_MASK = 0x70,
ATP867X_IO_DMAMODE_UDMA_6 = 0x07,
ATP867X_IO_DMAMODE_UDMA_5 = 0x06,
ATP867X_IO_DMAMODE_UDMA_4 = 0x05,
ATP867X_IO_DMAMODE_UDMA_3 = 0x04,
ATP867X_IO_DMAMODE_UDMA_2 = 0x03,
ATP867X_IO_DMAMODE_UDMA_1 = 0x02,
ATP867X_IO_DMAMODE_UDMA_0 = 0x01,
ATP867X_IO_DMAMODE_DISABLE = 0x00,
ATP867X_IO_SYS_INFO_66MHZ = 0x04,
ATP867X_IO_SYS_INFO_SLOW_UDMA5 = 0x02,
ATP867X_IO_SYS_MASK_RESERVED = (~0xf1),
ATP867X_IO_PORTSPD_VAL = 0x1143,
ATP867X_PREREAD_VAL = 0x0200,
ATP867X_NUM_PORTS = 4,
ATP867X_BAR_IOBASE = 0,
ATP867X_BAR_ROMBASE = 6,
};
#define ATP867X_IOBASE(ap) ((ap)->host->iomap[0])
#define ATP867X_SYS_INFO(ap) (0x3F + ATP867X_IOBASE(ap))
#define ATP867X_IO_PORTBASE(ap, port) (0x00 + ATP867X_IOBASE(ap) + \
(port) * ATP867X_IO_CHANNEL_OFFSET)
#define ATP867X_IO_DMABASE(ap, port) (0x40 + \
ATP867X_IO_PORTBASE((ap), (port)))
#define ATP867X_IO_STATUS(ap, port) (0x07 + \
ATP867X_IO_PORTBASE((ap), (port)))
#define ATP867X_IO_ALTSTATUS(ap, port) (0x0E + \
ATP867X_IO_PORTBASE((ap), (port)))
/*
* hot priv ports
*/
#define ATP867X_IO_MSTRPIOSPD(ap, port) (0x08 + \
ATP867X_IO_DMABASE((ap), (port)))
#define ATP867X_IO_SLAVPIOSPD(ap, port) (0x09 + \
ATP867X_IO_DMABASE((ap), (port)))
#define ATP867X_IO_8BPIOSPD(ap, port) (0x0A + \
ATP867X_IO_DMABASE((ap), (port)))
#define ATP867X_IO_DMAMODE(ap, port) (0x0B + \
ATP867X_IO_DMABASE((ap), (port)))
#define ATP867X_IO_PORTSPD(ap, port) (0x4A + \
ATP867X_IO_PORTBASE((ap), (port)))
#define ATP867X_IO_PREREAD(ap, port) (0x4C + \
ATP867X_IO_PORTBASE((ap), (port)))
struct atp867x_priv {
void __iomem *dma_mode;
void __iomem *mstr_piospd;
void __iomem *slave_piospd;
void __iomem *eightb_piospd;
int pci66mhz;
};
static void atp867x_set_dmamode(struct ata_port *ap, struct ata_device *adev)
{
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
struct atp867x_priv *dp = ap->private_data;
u8 speed = adev->dma_mode;
u8 b;
u8 mode = speed - XFER_UDMA_0 + 1;
/*
* Doc 6.6.9: decrease the udma mode value by 1 for safer UDMA speed
* on 66MHz bus
* rev-A: UDMA_1~4 (5, 6 no change)
* rev-B: all UDMA modes
* UDMA_0 stays not to disable UDMA
*/
if (dp->pci66mhz && mode > ATP867X_IO_DMAMODE_UDMA_0 &&
(pdev->device == PCI_DEVICE_ID_ARTOP_ATP867B ||
mode < ATP867X_IO_DMAMODE_UDMA_5))
mode--;
b = ioread8(dp->dma_mode);
if (adev->devno & 1) {
b = (b & ~ATP867X_IO_DMAMODE_SLAVE_MASK) |
(mode << ATP867X_IO_DMAMODE_SLAVE_SHIFT);
} else {
b = (b & ~ATP867X_IO_DMAMODE_MSTR_MASK) |
(mode << ATP867X_IO_DMAMODE_MSTR_SHIFT);
}
iowrite8(b, dp->dma_mode);
}
static int atp867x_get_active_clocks_shifted(struct ata_port *ap,
unsigned int clk)
{
struct atp867x_priv *dp = ap->private_data;
unsigned char clocks = clk;
/*
* Doc 6.6.9: increase the clock value by 1 for safer PIO speed
* on 66MHz bus
*/
if (dp->pci66mhz)
clocks++;
switch (clocks) {
case 0:
clocks = 1;
break;
case 1 ... 6:
break;
default:
printk(KERN_WARNING "ATP867X: active %dclk is invalid. "
"Using 12clk.\n", clk);
case 9 ... 12:
clocks = 7; /* 12 clk */
break;
case 7:
case 8: /* default 8 clk */
clocks = 0;
goto active_clock_shift_done;
}
active_clock_shift_done:
return clocks << ATP867X_IO_PIOSPD_ACTIVE_SHIFT;
}
static int atp867x_get_recover_clocks_shifted(unsigned int clk)
{
unsigned char clocks = clk;
switch (clocks) {
case 0:
clocks = 1;
break;
case 1 ... 11:
break;
case 13:
case 14:
--clocks; /* by the spec */
break;
case 15:
break;
default:
printk(KERN_WARNING "ATP867X: recover %dclk is invalid. "
"Using default 12clk.\n", clk);
case 12: /* default 12 clk */
clocks = 0;
break;
}
return clocks << ATP867X_IO_PIOSPD_RECOVER_SHIFT;
}
static void atp867x_set_piomode(struct ata_port *ap, struct ata_device *adev)
{
struct ata_device *peer = ata_dev_pair(adev);
struct atp867x_priv *dp = ap->private_data;
u8 speed = adev->pio_mode;
struct ata_timing t, p;
int T, UT;
u8 b;
T = 1000000000 / 33333;
UT = T / 4;
ata_timing_compute(adev, speed, &t, T, UT);
if (peer && peer->pio_mode) {
ata_timing_compute(peer, peer->pio_mode, &p, T, UT);
ata_timing_merge(&p, &t, &t, ATA_TIMING_8BIT);
}
b = ioread8(dp->dma_mode);
if (adev->devno & 1)
b = (b & ~ATP867X_IO_DMAMODE_SLAVE_MASK);
else
b = (b & ~ATP867X_IO_DMAMODE_MSTR_MASK);
iowrite8(b, dp->dma_mode);
b = atp867x_get_active_clocks_shifted(ap, t.active) |
atp867x_get_recover_clocks_shifted(t.recover);
if (adev->devno & 1)
iowrite8(b, dp->slave_piospd);
else
iowrite8(b, dp->mstr_piospd);
b = atp867x_get_active_clocks_shifted(ap, t.act8b) |
atp867x_get_recover_clocks_shifted(t.rec8b);
iowrite8(b, dp->eightb_piospd);
}
static int atp867x_cable_override(struct pci_dev *pdev)
{
if (pdev->subsystem_vendor == PCI_VENDOR_ID_ARTOP &&
(pdev->subsystem_device == PCI_DEVICE_ID_ARTOP_ATP867A ||
pdev->subsystem_device == PCI_DEVICE_ID_ARTOP_ATP867B)) {
return 1;
}
return 0;
}
static int atp867x_cable_detect(struct ata_port *ap)
{
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
if (atp867x_cable_override(pdev))
return ATA_CBL_PATA40_SHORT;
return ATA_CBL_PATA_UNK;
}
static struct scsi_host_template atp867x_sht = {
ATA_BMDMA_SHT(DRV_NAME),
};
static struct ata_port_operations atp867x_ops = {
.inherits = &ata_bmdma_port_ops,
.cable_detect = atp867x_cable_detect,
.set_piomode = atp867x_set_piomode,
.set_dmamode = atp867x_set_dmamode,
};
#ifdef ATP867X_DEBUG
static void atp867x_check_res(struct pci_dev *pdev)
{
int i;
unsigned long start, len;
/* Check the PCI resources for this channel are enabled */
for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
start = pci_resource_start(pdev, i);
len = pci_resource_len(pdev, i);
printk(KERN_DEBUG "ATP867X: resource start:len=%lx:%lx\n",
start, len);
}
}
static void atp867x_check_ports(struct ata_port *ap, int port)
{
struct ata_ioports *ioaddr = &ap->ioaddr;
struct atp867x_priv *dp = ap->private_data;
printk(KERN_DEBUG "ATP867X: port[%d] addresses\n"
" cmd_addr =0x%llx, 0x%llx\n"
" ctl_addr =0x%llx, 0x%llx\n"
" bmdma_addr =0x%llx, 0x%llx\n"
" data_addr =0x%llx\n"
" error_addr =0x%llx\n"
" feature_addr =0x%llx\n"
" nsect_addr =0x%llx\n"
" lbal_addr =0x%llx\n"
" lbam_addr =0x%llx\n"
" lbah_addr =0x%llx\n"
" device_addr =0x%llx\n"
" status_addr =0x%llx\n"
" command_addr =0x%llx\n"
" dp->dma_mode =0x%llx\n"
" dp->mstr_piospd =0x%llx\n"
" dp->slave_piospd =0x%llx\n"
" dp->eightb_piospd =0x%llx\n"
" dp->pci66mhz =0x%lx\n",
port,
(unsigned long long)ioaddr->cmd_addr,
(unsigned long long)ATP867X_IO_PORTBASE(ap, port),
(unsigned long long)ioaddr->ctl_addr,
(unsigned long long)ATP867X_IO_ALTSTATUS(ap, port),
(unsigned long long)ioaddr->bmdma_addr,
(unsigned long long)ATP867X_IO_DMABASE(ap, port),
(unsigned long long)ioaddr->data_addr,
(unsigned long long)ioaddr->error_addr,
(unsigned long long)ioaddr->feature_addr,
(unsigned long long)ioaddr->nsect_addr,
(unsigned long long)ioaddr->lbal_addr,
(unsigned long long)ioaddr->lbam_addr,
(unsigned long long)ioaddr->lbah_addr,
(unsigned long long)ioaddr->device_addr,
(unsigned long long)ioaddr->status_addr,
(unsigned long long)ioaddr->command_addr,
(unsigned long long)dp->dma_mode,
(unsigned long long)dp->mstr_piospd,
(unsigned long long)dp->slave_piospd,
(unsigned long long)dp->eightb_piospd,
(unsigned long)dp->pci66mhz);
}
#endif
static int atp867x_set_priv(struct ata_port *ap)
{
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
struct atp867x_priv *dp;
int port = ap->port_no;
dp = ap->private_data =
devm_kzalloc(&pdev->dev, sizeof(*dp), GFP_KERNEL);
if (dp == NULL)
return -ENOMEM;
dp->dma_mode = ATP867X_IO_DMAMODE(ap, port);
dp->mstr_piospd = ATP867X_IO_MSTRPIOSPD(ap, port);
dp->slave_piospd = ATP867X_IO_SLAVPIOSPD(ap, port);
dp->eightb_piospd = ATP867X_IO_8BPIOSPD(ap, port);
dp->pci66mhz =
ioread8(ATP867X_SYS_INFO(ap)) & ATP867X_IO_SYS_INFO_66MHZ;
return 0;
}
static void atp867x_fixup(struct ata_host *host)
{
struct pci_dev *pdev = to_pci_dev(host->dev);
struct ata_port *ap = host->ports[0];
int i;
u8 v;
/*
* Broken BIOS might not set latency high enough
*/
pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &v);
if (v < 0x80) {
v = 0x80;
pci_write_config_byte(pdev, PCI_LATENCY_TIMER, v);
printk(KERN_DEBUG "ATP867X: set latency timer of device %s"
" to %d\n", pci_name(pdev), v);
}
/*
* init 8bit io ports speed(0aaarrrr) to 43h and
* init udma modes of master/slave to 0/0(11h)
*/
for (i = 0; i < ATP867X_NUM_PORTS; i++)
iowrite16(ATP867X_IO_PORTSPD_VAL, ATP867X_IO_PORTSPD(ap, i));
/*
* init PreREAD counts
*/
for (i = 0; i < ATP867X_NUM_PORTS; i++)
iowrite16(ATP867X_PREREAD_VAL, ATP867X_IO_PREREAD(ap, i));
v = ioread8(ATP867X_IOBASE(ap) + 0x28);
v &= 0xcf; /* Enable INTA#: bit4=0 means enable */
v |= 0xc0; /* Enable PCI burst, MRM & not immediate interrupts */
iowrite8(v, ATP867X_IOBASE(ap) + 0x28);
/*
* Turn off the over clocked udma5 mode, only for Rev-B
*/
v = ioread8(ATP867X_SYS_INFO(ap));
v &= ATP867X_IO_SYS_MASK_RESERVED;
if (pdev->device == PCI_DEVICE_ID_ARTOP_ATP867B)
v |= ATP867X_IO_SYS_INFO_SLOW_UDMA5;
iowrite8(v, ATP867X_SYS_INFO(ap));
}
static int atp867x_ata_pci_sff_init_host(struct ata_host *host)
{
struct device *gdev = host->dev;
struct pci_dev *pdev = to_pci_dev(gdev);
unsigned int mask = 0;
int i, rc;
/*
* do not map rombase
*/
rc = pcim_iomap_regions(pdev, 1 << ATP867X_BAR_IOBASE, DRV_NAME);
if (rc == -EBUSY)
pcim_pin_device(pdev);
if (rc)
return rc;
host->iomap = pcim_iomap_table(pdev);
#ifdef ATP867X_DEBUG
atp867x_check_res(pdev);
for (i = 0; i < PCI_ROM_RESOURCE; i++)
printk(KERN_DEBUG "ATP867X: iomap[%d]=0x%llx\n", i,
(unsigned long long)(host->iomap[i]));
#endif
/*
* request, iomap BARs and init port addresses accordingly
*/
for (i = 0; i < host->n_ports; i++) {
struct ata_port *ap = host->ports[i];
struct ata_ioports *ioaddr = &ap->ioaddr;
ioaddr->cmd_addr = ATP867X_IO_PORTBASE(ap, i);
ioaddr->ctl_addr = ioaddr->altstatus_addr
= ATP867X_IO_ALTSTATUS(ap, i);
ioaddr->bmdma_addr = ATP867X_IO_DMABASE(ap, i);
ata_sff_std_ports(ioaddr);
rc = atp867x_set_priv(ap);
if (rc)
return rc;
#ifdef ATP867X_DEBUG
atp867x_check_ports(ap, i);
#endif
ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx",
(unsigned long)ioaddr->cmd_addr,
(unsigned long)ioaddr->ctl_addr);
ata_port_desc(ap, "bmdma 0x%lx",
(unsigned long)ioaddr->bmdma_addr);
mask |= 1 << i;
}
if (!mask) {
dev_printk(KERN_ERR, gdev, "no available native port\n");
return -ENODEV;
}
atp867x_fixup(host);
rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
if (rc)
return rc;
rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
return rc;
}
static int atp867x_init_one(struct pci_dev *pdev,
const struct pci_device_id *id)
{
static int printed_version;
static const struct ata_port_info info_867x = {
.flags = ATA_FLAG_SLAVE_POSS,
.pio_mask = ATA_PIO4,
.udma_mask = ATA_UDMA6,
.port_ops = &atp867x_ops,
};
struct ata_host *host;
const struct ata_port_info *ppi[] = { &info_867x, NULL };
int rc;
if (!printed_version++)
dev_printk(KERN_INFO, &pdev->dev, "version " DRV_VERSION "\n");
rc = pcim_enable_device(pdev);
if (rc)
return rc;
printk(KERN_INFO "ATP867X: ATP867 ATA UDMA133 controller (rev %02X)",
pdev->device);
host = ata_host_alloc_pinfo(&pdev->dev, ppi, ATP867X_NUM_PORTS);
if (!host) {
dev_printk(KERN_ERR, &pdev->dev,
"failed to allocate ATA host\n");
rc = -ENOMEM;
goto err_out;
}
rc = atp867x_ata_pci_sff_init_host(host);
if (rc) {
dev_printk(KERN_ERR, &pdev->dev, "failed to init host\n");
goto err_out;
}
pci_set_master(pdev);
rc = ata_host_activate(host, pdev->irq, ata_sff_interrupt,
IRQF_SHARED, &atp867x_sht);
if (rc)
dev_printk(KERN_ERR, &pdev->dev, "failed to activate host\n");
err_out:
return rc;
}
#ifdef CONFIG_PM
static int atp867x_reinit_one(struct pci_dev *pdev)
{
struct ata_host *host = dev_get_drvdata(&pdev->dev);
int rc;
rc = ata_pci_device_do_resume(pdev);
if (rc)
return rc;
atp867x_fixup(host);
ata_host_resume(host);
return 0;
}
#endif
static struct pci_device_id atp867x_pci_tbl[] = {
{ PCI_VDEVICE(ARTOP, PCI_DEVICE_ID_ARTOP_ATP867A), 0 },
{ PCI_VDEVICE(ARTOP, PCI_DEVICE_ID_ARTOP_ATP867B), 0 },
{ },
};
static struct pci_driver atp867x_driver = {
.name = DRV_NAME,
.id_table = atp867x_pci_tbl,
.probe = atp867x_init_one,
.remove = ata_pci_remove_one,
#ifdef CONFIG_PM
.suspend = ata_pci_device_suspend,
.resume = atp867x_reinit_one,
#endif
};
static int __init atp867x_init(void)
{
return pci_register_driver(&atp867x_driver);
}
static void __exit atp867x_exit(void)
{
pci_unregister_driver(&atp867x_driver);
}
MODULE_AUTHOR("John(Jung-Ik) Lee, Google Inc.");
MODULE_DESCRIPTION("low level driver for Artop/Acard 867x ATA controller");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, atp867x_pci_tbl);
MODULE_VERSION(DRV_VERSION);
module_init(atp867x_init);
module_exit(atp867x_exit);
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