linux/drivers/edac/i3000_edac.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

553 lines
13 KiB
C

/*
* Intel 3000/3010 Memory Controller kernel module
* Copyright (C) 2007 Akamai Technologies, Inc.
* Shamelessly copied from:
* Intel D82875P Memory Controller kernel module
* (C) 2003 Linux Networx (http://lnxi.com)
*
* This file may be distributed under the terms of the
* GNU General Public License.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/pci_ids.h>
#include <linux/edac.h>
#include "edac_core.h"
#define I3000_REVISION "1.1"
#define EDAC_MOD_STR "i3000_edac"
#define I3000_RANKS 8
#define I3000_RANKS_PER_CHANNEL 4
#define I3000_CHANNELS 2
/* Intel 3000 register addresses - device 0 function 0 - DRAM Controller */
#define I3000_MCHBAR 0x44 /* MCH Memory Mapped Register BAR */
#define I3000_MCHBAR_MASK 0xffffc000
#define I3000_MMR_WINDOW_SIZE 16384
#define I3000_EDEAP 0x70 /* Extended DRAM Error Address Pointer (8b)
*
* 7:1 reserved
* 0 bit 32 of address
*/
#define I3000_DEAP 0x58 /* DRAM Error Address Pointer (32b)
*
* 31:7 address
* 6:1 reserved
* 0 Error channel 0/1
*/
#define I3000_DEAP_GRAIN (1 << 7)
/*
* Helper functions to decode the DEAP/EDEAP hardware registers.
*
* The type promotion here is deliberate; we're deriving an
* unsigned long pfn and offset from hardware regs which are u8/u32.
*/
static inline unsigned long deap_pfn(u8 edeap, u32 deap)
{
deap >>= PAGE_SHIFT;
deap |= (edeap & 1) << (32 - PAGE_SHIFT);
return deap;
}
static inline unsigned long deap_offset(u32 deap)
{
return deap & ~(I3000_DEAP_GRAIN - 1) & ~PAGE_MASK;
}
static inline int deap_channel(u32 deap)
{
return deap & 1;
}
#define I3000_DERRSYN 0x5c /* DRAM Error Syndrome (8b)
*
* 7:0 DRAM ECC Syndrome
*/
#define I3000_ERRSTS 0xc8 /* Error Status Register (16b)
*
* 15:12 reserved
* 11 MCH Thermal Sensor Event
* for SMI/SCI/SERR
* 10 reserved
* 9 LOCK to non-DRAM Memory Flag (LCKF)
* 8 Received Refresh Timeout Flag (RRTOF)
* 7:2 reserved
* 1 Multi-bit DRAM ECC Error Flag (DMERR)
* 0 Single-bit DRAM ECC Error Flag (DSERR)
*/
#define I3000_ERRSTS_BITS 0x0b03 /* bits which indicate errors */
#define I3000_ERRSTS_UE 0x0002
#define I3000_ERRSTS_CE 0x0001
#define I3000_ERRCMD 0xca /* Error Command (16b)
*
* 15:12 reserved
* 11 SERR on MCH Thermal Sensor Event
* (TSESERR)
* 10 reserved
* 9 SERR on LOCK to non-DRAM Memory
* (LCKERR)
* 8 SERR on DRAM Refresh Timeout
* (DRTOERR)
* 7:2 reserved
* 1 SERR Multi-Bit DRAM ECC Error
* (DMERR)
* 0 SERR on Single-Bit ECC Error
* (DSERR)
*/
/* Intel MMIO register space - device 0 function 0 - MMR space */
#define I3000_DRB_SHIFT 25 /* 32MiB grain */
#define I3000_C0DRB 0x100 /* Channel 0 DRAM Rank Boundary (8b x 4)
*
* 7:0 Channel 0 DRAM Rank Boundary Address
*/
#define I3000_C1DRB 0x180 /* Channel 1 DRAM Rank Boundary (8b x 4)
*
* 7:0 Channel 1 DRAM Rank Boundary Address
*/
#define I3000_C0DRA 0x108 /* Channel 0 DRAM Rank Attribute (8b x 2)
*
* 7 reserved
* 6:4 DRAM odd Rank Attribute
* 3 reserved
* 2:0 DRAM even Rank Attribute
*
* Each attribute defines the page
* size of the corresponding rank:
* 000: unpopulated
* 001: reserved
* 010: 4 KB
* 011: 8 KB
* 100: 16 KB
* Others: reserved
*/
#define I3000_C1DRA 0x188 /* Channel 1 DRAM Rank Attribute (8b x 2) */
static inline unsigned char odd_rank_attrib(unsigned char dra)
{
return (dra & 0x70) >> 4;
}
static inline unsigned char even_rank_attrib(unsigned char dra)
{
return dra & 0x07;
}
#define I3000_C0DRC0 0x120 /* DRAM Controller Mode 0 (32b)
*
* 31:30 reserved
* 29 Initialization Complete (IC)
* 28:11 reserved
* 10:8 Refresh Mode Select (RMS)
* 7 reserved
* 6:4 Mode Select (SMS)
* 3:2 reserved
* 1:0 DRAM Type (DT)
*/
#define I3000_C0DRC1 0x124 /* DRAM Controller Mode 1 (32b)
*
* 31 Enhanced Addressing Enable (ENHADE)
* 30:0 reserved
*/
enum i3000p_chips {
I3000 = 0,
};
struct i3000_dev_info {
const char *ctl_name;
};
struct i3000_error_info {
u16 errsts;
u8 derrsyn;
u8 edeap;
u32 deap;
u16 errsts2;
};
static const struct i3000_dev_info i3000_devs[] = {
[I3000] = {
.ctl_name = "i3000"},
};
static struct pci_dev *mci_pdev;
static int i3000_registered = 1;
static struct edac_pci_ctl_info *i3000_pci;
static void i3000_get_error_info(struct mem_ctl_info *mci,
struct i3000_error_info *info)
{
struct pci_dev *pdev;
pdev = to_pci_dev(mci->dev);
/*
* This is a mess because there is no atomic way to read all the
* registers at once and the registers can transition from CE being
* overwritten by UE.
*/
pci_read_config_word(pdev, I3000_ERRSTS, &info->errsts);
if (!(info->errsts & I3000_ERRSTS_BITS))
return;
pci_read_config_byte(pdev, I3000_EDEAP, &info->edeap);
pci_read_config_dword(pdev, I3000_DEAP, &info->deap);
pci_read_config_byte(pdev, I3000_DERRSYN, &info->derrsyn);
pci_read_config_word(pdev, I3000_ERRSTS, &info->errsts2);
/*
* If the error is the same for both reads then the first set
* of reads is valid. If there is a change then there is a CE
* with no info and the second set of reads is valid and
* should be UE info.
*/
if ((info->errsts ^ info->errsts2) & I3000_ERRSTS_BITS) {
pci_read_config_byte(pdev, I3000_EDEAP, &info->edeap);
pci_read_config_dword(pdev, I3000_DEAP, &info->deap);
pci_read_config_byte(pdev, I3000_DERRSYN, &info->derrsyn);
}
/*
* Clear any error bits.
* (Yes, we really clear bits by writing 1 to them.)
*/
pci_write_bits16(pdev, I3000_ERRSTS, I3000_ERRSTS_BITS,
I3000_ERRSTS_BITS);
}
static int i3000_process_error_info(struct mem_ctl_info *mci,
struct i3000_error_info *info,
int handle_errors)
{
int row, multi_chan, channel;
unsigned long pfn, offset;
multi_chan = mci->csrows[0].nr_channels - 1;
if (!(info->errsts & I3000_ERRSTS_BITS))
return 0;
if (!handle_errors)
return 1;
if ((info->errsts ^ info->errsts2) & I3000_ERRSTS_BITS) {
edac_mc_handle_ce_no_info(mci, "UE overwrote CE");
info->errsts = info->errsts2;
}
pfn = deap_pfn(info->edeap, info->deap);
offset = deap_offset(info->deap);
channel = deap_channel(info->deap);
row = edac_mc_find_csrow_by_page(mci, pfn);
if (info->errsts & I3000_ERRSTS_UE)
edac_mc_handle_ue(mci, pfn, offset, row, "i3000 UE");
else
edac_mc_handle_ce(mci, pfn, offset, info->derrsyn, row,
multi_chan ? channel : 0, "i3000 CE");
return 1;
}
static void i3000_check(struct mem_ctl_info *mci)
{
struct i3000_error_info info;
debugf1("MC%d: %s()\n", mci->mc_idx, __func__);
i3000_get_error_info(mci, &info);
i3000_process_error_info(mci, &info, 1);
}
static int i3000_is_interleaved(const unsigned char *c0dra,
const unsigned char *c1dra,
const unsigned char *c0drb,
const unsigned char *c1drb)
{
int i;
/*
* If the channels aren't populated identically then
* we're not interleaved.
*/
for (i = 0; i < I3000_RANKS_PER_CHANNEL / 2; i++)
if (odd_rank_attrib(c0dra[i]) != odd_rank_attrib(c1dra[i]) ||
even_rank_attrib(c0dra[i]) !=
even_rank_attrib(c1dra[i]))
return 0;
/*
* If the rank boundaries for the two channels are different
* then we're not interleaved.
*/
for (i = 0; i < I3000_RANKS_PER_CHANNEL; i++)
if (c0drb[i] != c1drb[i])
return 0;
return 1;
}
static int i3000_probe1(struct pci_dev *pdev, int dev_idx)
{
int rc;
int i;
struct mem_ctl_info *mci = NULL;
unsigned long last_cumul_size;
int interleaved, nr_channels;
unsigned char dra[I3000_RANKS / 2], drb[I3000_RANKS];
unsigned char *c0dra = dra, *c1dra = &dra[I3000_RANKS_PER_CHANNEL / 2];
unsigned char *c0drb = drb, *c1drb = &drb[I3000_RANKS_PER_CHANNEL];
unsigned long mchbar;
void __iomem *window;
debugf0("MC: %s()\n", __func__);
pci_read_config_dword(pdev, I3000_MCHBAR, (u32 *) & mchbar);
mchbar &= I3000_MCHBAR_MASK;
window = ioremap_nocache(mchbar, I3000_MMR_WINDOW_SIZE);
if (!window) {
printk(KERN_ERR "i3000: cannot map mmio space at 0x%lx\n",
mchbar);
return -ENODEV;
}
c0dra[0] = readb(window + I3000_C0DRA + 0); /* ranks 0,1 */
c0dra[1] = readb(window + I3000_C0DRA + 1); /* ranks 2,3 */
c1dra[0] = readb(window + I3000_C1DRA + 0); /* ranks 0,1 */
c1dra[1] = readb(window + I3000_C1DRA + 1); /* ranks 2,3 */
for (i = 0; i < I3000_RANKS_PER_CHANNEL; i++) {
c0drb[i] = readb(window + I3000_C0DRB + i);
c1drb[i] = readb(window + I3000_C1DRB + i);
}
iounmap(window);
/*
* Figure out how many channels we have.
*
* If we have what the datasheet calls "asymmetric channels"
* (essentially the same as what was called "virtual single
* channel mode" in the i82875) then it's a single channel as
* far as EDAC is concerned.
*/
interleaved = i3000_is_interleaved(c0dra, c1dra, c0drb, c1drb);
nr_channels = interleaved ? 2 : 1;
mci = edac_mc_alloc(0, I3000_RANKS / nr_channels, nr_channels, 0);
if (!mci)
return -ENOMEM;
debugf3("MC: %s(): init mci\n", __func__);
mci->dev = &pdev->dev;
mci->mtype_cap = MEM_FLAG_DDR2;
mci->edac_ctl_cap = EDAC_FLAG_SECDED;
mci->edac_cap = EDAC_FLAG_SECDED;
mci->mod_name = EDAC_MOD_STR;
mci->mod_ver = I3000_REVISION;
mci->ctl_name = i3000_devs[dev_idx].ctl_name;
mci->dev_name = pci_name(pdev);
mci->edac_check = i3000_check;
mci->ctl_page_to_phys = NULL;
/*
* The dram rank boundary (DRB) reg values are boundary addresses
* for each DRAM rank with a granularity of 32MB. DRB regs are
* cumulative; the last one will contain the total memory
* contained in all ranks.
*
* If we're in interleaved mode then we're only walking through
* the ranks of controller 0, so we double all the values we see.
*/
for (last_cumul_size = i = 0; i < mci->nr_csrows; i++) {
u8 value;
u32 cumul_size;
struct csrow_info *csrow = &mci->csrows[i];
value = drb[i];
cumul_size = value << (I3000_DRB_SHIFT - PAGE_SHIFT);
if (interleaved)
cumul_size <<= 1;
debugf3("MC: %s(): (%d) cumul_size 0x%x\n",
__func__, i, cumul_size);
if (cumul_size == last_cumul_size) {
csrow->mtype = MEM_EMPTY;
continue;
}
csrow->first_page = last_cumul_size;
csrow->last_page = cumul_size - 1;
csrow->nr_pages = cumul_size - last_cumul_size;
last_cumul_size = cumul_size;
csrow->grain = I3000_DEAP_GRAIN;
csrow->mtype = MEM_DDR2;
csrow->dtype = DEV_UNKNOWN;
csrow->edac_mode = EDAC_UNKNOWN;
}
/*
* Clear any error bits.
* (Yes, we really clear bits by writing 1 to them.)
*/
pci_write_bits16(pdev, I3000_ERRSTS, I3000_ERRSTS_BITS,
I3000_ERRSTS_BITS);
rc = -ENODEV;
if (edac_mc_add_mc(mci)) {
debugf3("MC: %s(): failed edac_mc_add_mc()\n", __func__);
goto fail;
}
/* allocating generic PCI control info */
i3000_pci = edac_pci_create_generic_ctl(&pdev->dev, EDAC_MOD_STR);
if (!i3000_pci) {
printk(KERN_WARNING
"%s(): Unable to create PCI control\n",
__func__);
printk(KERN_WARNING
"%s(): PCI error report via EDAC not setup\n",
__func__);
}
/* get this far and it's successful */
debugf3("MC: %s(): success\n", __func__);
return 0;
fail:
if (mci)
edac_mc_free(mci);
return rc;
}
/* returns count (>= 0), or negative on error */
static int __devinit i3000_init_one(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
int rc;
debugf0("MC: %s()\n", __func__);
if (pci_enable_device(pdev) < 0)
return -EIO;
rc = i3000_probe1(pdev, ent->driver_data);
if (!mci_pdev)
mci_pdev = pci_dev_get(pdev);
return rc;
}
static void __devexit i3000_remove_one(struct pci_dev *pdev)
{
struct mem_ctl_info *mci;
debugf0("%s()\n", __func__);
if (i3000_pci)
edac_pci_release_generic_ctl(i3000_pci);
mci = edac_mc_del_mc(&pdev->dev);
if (!mci)
return;
edac_mc_free(mci);
}
static const struct pci_device_id i3000_pci_tbl[] __devinitdata = {
{
PCI_VEND_DEV(INTEL, 3000_HB), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
I3000},
{
0,
} /* 0 terminated list. */
};
MODULE_DEVICE_TABLE(pci, i3000_pci_tbl);
static struct pci_driver i3000_driver = {
.name = EDAC_MOD_STR,
.probe = i3000_init_one,
.remove = __devexit_p(i3000_remove_one),
.id_table = i3000_pci_tbl,
};
static int __init i3000_init(void)
{
int pci_rc;
debugf3("MC: %s()\n", __func__);
/* Ensure that the OPSTATE is set correctly for POLL or NMI */
opstate_init();
pci_rc = pci_register_driver(&i3000_driver);
if (pci_rc < 0)
goto fail0;
if (!mci_pdev) {
i3000_registered = 0;
mci_pdev = pci_get_device(PCI_VENDOR_ID_INTEL,
PCI_DEVICE_ID_INTEL_3000_HB, NULL);
if (!mci_pdev) {
debugf0("i3000 pci_get_device fail\n");
pci_rc = -ENODEV;
goto fail1;
}
pci_rc = i3000_init_one(mci_pdev, i3000_pci_tbl);
if (pci_rc < 0) {
debugf0("i3000 init fail\n");
pci_rc = -ENODEV;
goto fail1;
}
}
return 0;
fail1:
pci_unregister_driver(&i3000_driver);
fail0:
if (mci_pdev)
pci_dev_put(mci_pdev);
return pci_rc;
}
static void __exit i3000_exit(void)
{
debugf3("MC: %s()\n", __func__);
pci_unregister_driver(&i3000_driver);
if (!i3000_registered) {
i3000_remove_one(mci_pdev);
pci_dev_put(mci_pdev);
}
}
module_init(i3000_init);
module_exit(i3000_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Akamai Technologies Arthur Ulfeldt/Jason Uhlenkott");
MODULE_DESCRIPTION("MC support for Intel 3000 memory hub controllers");
module_param(edac_op_state, int, 0444);
MODULE_PARM_DESC(edac_op_state, "EDAC Error Reporting state: 0=Poll,1=NMI");