diff mbox

[v8,2/3] PCI: Make sure the driver could get correct BAR size from pci_resource_len()

Message ID 1484898113-24939-3-git-send-email-xyjxie@linux.vnet.ibm.com (mailing list archive)
State Superseded
Headers show

Commit Message

Yongji Xie Jan. 20, 2017, 7:41 a.m. UTC 
When using resource_alignment kernel parameter, the current implement
reassigns the alignment by expanding resources' size. So there exists two
kinds of *size* for one PCI BAR. One is the hardware size, the other is
the allocated size. Currently pci_resource_len() used by drivers return
the allocated size rather than the hardware size. This may potentially
break some drivers when they use the size to locate some registers whose
length is related to the hardware size. Some examples as below:

- misc\Hpilo.c:
off = pci_resource_len(pdev, bar) - 0x2000;

- net\ethernet\chelsio\cxgb4\cxgb4_uld.h:
(pci_resource_len((pdev), 2) - roundup_pow_of_two((vres)->ocq.size))

- infiniband\hw\nes\Nes_hw.c:
num_pds = pci_resource_len(nesdev->pcidev, BAR_1) >> PAGE_SHIFT;

This modifies pci_resource_len() to be aware of the increased size.
So it could return the hardware size instead. And if we need the allocated
size, resource_size()(or we can introuce a new helper function) can be used
to get it.

Signed-off-by: Yongji Xie <xyjxie@linux.vnet.ibm.com>
---
 drivers/pci/pci.c   |    1 +
 include/linux/pci.h |    6 +++++-
 2 files changed, 6 insertions(+), 1 deletion(-)

Comments

kernel test robot Jan. 20, 2017, 7:53 p.m. UTC | #1 
Hi Yongji,

[auto build test WARNING on pci/next]
[also build test WARNING on v4.10-rc4 next-20170120]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Yongji-Xie/PCI-Ignore-requested-alignment-for-IOV-BARs/20170121-031322
base:   https://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git next
config: i386-defconfig (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All warnings (new ones prefixed by >>):

   In file included from drivers/ata/ata_piix.c:88:0:
   drivers/ata/ata_piix.c: In function 'piix_init_sidpr':
>> include/linux/pci.h:1648:44: warning: comparison between 'enum <anonymous>' and 'enum <anonymous>' [-Wenum-compare]
    #define pci_resource_end(dev, bar) (((bar) > PCI_ROM_RESOURCE) ? \
                                               ^
>> include/linux/pci.h:1655:4: note: in expansion of macro 'pci_resource_end'
       pci_resource_end((dev), (bar)) ==  \
       ^~~~~~~~~~~~~~~~
>> drivers/ata/ata_piix.c:1471:6: note: in expansion of macro 'pci_resource_len'
         pci_resource_len(pdev, PIIX_SIDPR_BAR) != PIIX_SIDPR_LEN)
         ^~~~~~~~~~~~~~~~
>> include/linux/pci.h:1648:44: warning: comparison between 'enum <anonymous>' and 'enum <anonymous>' [-Wenum-compare]
    #define pci_resource_end(dev, bar) (((bar) > PCI_ROM_RESOURCE) ? \
                                               ^
   include/linux/pci.h:1658:4: note: in expansion of macro 'pci_resource_end'
      (pci_resource_end((dev), (bar)) -  \
       ^~~~~~~~~~~~~~~~
>> drivers/ata/ata_piix.c:1471:6: note: in expansion of macro 'pci_resource_len'
         pci_resource_len(pdev, PIIX_SIDPR_BAR) != PIIX_SIDPR_LEN)
         ^~~~~~~~~~~~~~~~

vim +1648 include/linux/pci.h

  1642	#define pci_root_bus_fwnode(bus)	NULL
  1643	#endif
  1644	
  1645	/* these helpers provide future and backwards compatibility
  1646	 * for accessing popular PCI BAR info */
  1647	#define pci_resource_start(dev, bar)	((dev)->resource[(bar)].start)
> 1648	#define pci_resource_end(dev, bar)	(((bar) > PCI_ROM_RESOURCE) ?	\
  1649						(dev)->resource[(bar)].end :	\
  1650						((dev)->resource[(bar)].end -	\
  1651						(dev)->res_addsize[(bar)]))
  1652	#define pci_resource_flags(dev, bar)	((dev)->resource[(bar)].flags)
  1653	#define pci_resource_len(dev,bar) \
  1654		((pci_resource_start((dev), (bar)) == 0 &&	\
> 1655		  pci_resource_end((dev), (bar)) ==		\
  1656		  pci_resource_start((dev), (bar))) ? 0 :	\
  1657								\
  1658		 (pci_resource_end((dev), (bar)) -		\

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
kernel test robot Jan. 20, 2017, 8:41 p.m. UTC | #2 
Hi Yongji,

[auto build test WARNING on pci/next]
[also build test WARNING on v4.10-rc4 next-20170120]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Yongji-Xie/PCI-Ignore-requested-alignment-for-IOV-BARs/20170121-031322
base:   https://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git next
config: x86_64-kexec (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All warnings (new ones prefixed by >>):

   In file included from drivers/ata/sata_sis.c:35:0:
   drivers/ata/sata_sis.c: In function 'sis_init_one':
   include/linux/pci.h:1648:44: warning: comparison between 'enum <anonymous>' and 'enum <anonymous>' [-Wenum-compare]
    #define pci_resource_end(dev, bar) (((bar) > PCI_ROM_RESOURCE) ? \
                                               ^
   include/linux/pci.h:1655:4: note: in expansion of macro 'pci_resource_end'
       pci_resource_end((dev), (bar)) ==  \
       ^~~~~~~~~~~~~~~~
>> drivers/ata/sata_sis.c:223:8: note: in expansion of macro 'pci_resource_len'
          (pci_resource_len(pdev, SIS_SCR_PCI_BAR) < 128))) {
           ^~~~~~~~~~~~~~~~
   include/linux/pci.h:1648:44: warning: comparison between 'enum <anonymous>' and 'enum <anonymous>' [-Wenum-compare]
    #define pci_resource_end(dev, bar) (((bar) > PCI_ROM_RESOURCE) ? \
                                               ^
   include/linux/pci.h:1658:4: note: in expansion of macro 'pci_resource_end'
      (pci_resource_end((dev), (bar)) -  \
       ^~~~~~~~~~~~~~~~
>> drivers/ata/sata_sis.c:223:8: note: in expansion of macro 'pci_resource_len'
          (pci_resource_len(pdev, SIS_SCR_PCI_BAR) < 128))) {
           ^~~~~~~~~~~~~~~~

vim +/pci_resource_len +223 drivers/ata/sata_sis.c

af36d7f0 drivers/scsi/sata_sis.c Jeff Garzik               2005-08-28   29   *  Hardware documentation available under NDA.
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   30   *
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   31   */
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   32  
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   33  #include <linux/kernel.h>
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   34  #include <linux/module.h>
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  @35  #include <linux/pci.h>
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   36  #include <linux/blkdev.h>
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   37  #include <linux/delay.h>
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   38  #include <linux/interrupt.h>
a9524a76 drivers/scsi/sata_sis.c Jeff Garzik               2005-10-30   39  #include <linux/device.h>
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   40  #include <scsi/scsi_host.h>
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   41  #include <linux/libata.h>
4bb64fb9 drivers/ata/sata_sis.c  Alan Cox                  2007-02-16   42  #include "sis.h"
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   43  
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   44  #define DRV_NAME	"sata_sis"
2a3103ce drivers/ata/sata_sis.c  Jeff Garzik               2007-08-31   45  #define DRV_VERSION	"1.0"
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   46  
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   47  enum {
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   48  	sis_180			= 0,
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   49  	SIS_SCR_PCI_BAR		= 5,
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   50  
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   51  	/* PCI configuration registers */
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   52  	SIS_GENCTL		= 0x54, /* IDE General Control register */
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   53  	SIS_SCR_BASE		= 0xc0, /* sata0 phy SCR registers */
f2c853bc drivers/scsi/sata_sis.c Arnaud Patard             2005-09-07   54  	SIS180_SATA1_OFS	= 0x10, /* offset from sata0->sata1 phy regs */
f2c853bc drivers/scsi/sata_sis.c Arnaud Patard             2005-09-07   55  	SIS182_SATA1_OFS	= 0x20, /* offset from sata0->sata1 phy regs */
f2c853bc drivers/scsi/sata_sis.c Arnaud Patard             2005-09-07   56  	SIS_PMR			= 0x90, /* port mapping register */
f2c853bc drivers/scsi/sata_sis.c Arnaud Patard             2005-09-07   57  	SIS_PMR_COMBINED	= 0x30,
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   58  
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   59  	/* random bits */
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   60  	SIS_FLAG_CFGSCR		= (1 << 30), /* host flag: SCRs via PCI cfg */
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   61  
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   62  	GENCTL_IOMAPPED_SCR	= (1 << 26), /* if set, SCRs are in IO space */
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   63  };
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   64  
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   65  static int sis_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
82ef04fb drivers/ata/sata_sis.c  Tejun Heo                 2008-07-31   66  static int sis_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val);
82ef04fb drivers/ata/sata_sis.c  Tejun Heo                 2008-07-31   67  static int sis_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val);
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   68  
3b7d697d drivers/scsi/sata_sis.c Jeff Garzik               2005-11-10   69  static const struct pci_device_id sis_pci_tbl[] = {
3f3e7313 drivers/ata/sata_sis.c  Uwe Koziolek              2006-12-04   70  	{ PCI_VDEVICE(SI, 0x0180), sis_180 },	/* SiS 964/180 */
3f3e7313 drivers/ata/sata_sis.c  Uwe Koziolek              2006-12-04   71  	{ PCI_VDEVICE(SI, 0x0181), sis_180 },	/* SiS 964/180 */
3f3e7313 drivers/ata/sata_sis.c  Uwe Koziolek              2006-12-04   72  	{ PCI_VDEVICE(SI, 0x0182), sis_180 },	/* SiS 965/965L */
3f3e7313 drivers/ata/sata_sis.c  Uwe Koziolek              2006-12-04   73  	{ PCI_VDEVICE(SI, 0x0183), sis_180 },	/* SiS 965/965L */
a3cabb27 drivers/ata/sata_sis.c  Uwe Koziolek              2007-06-14   74  	{ PCI_VDEVICE(SI, 0x1182), sis_180 },	/* SiS 966/680 */
a3cabb27 drivers/ata/sata_sis.c  Uwe Koziolek              2007-06-14   75  	{ PCI_VDEVICE(SI, 0x1183), sis_180 },	/* SiS 966/966L/968/680 */
2d2744fc drivers/ata/sata_sis.c  Jeff Garzik               2006-09-28   76  
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   77  	{ }	/* terminate list */
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   78  };
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   79  
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   80  static struct pci_driver sis_pci_driver = {
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   81  	.name			= DRV_NAME,
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   82  	.id_table		= sis_pci_tbl,
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   83  	.probe			= sis_init_one,
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   84  	.remove			= ata_pci_remove_one,
58eb8cd5 drivers/ata/sata_sis.c  Bartlomiej Zolnierkiewicz 2014-05-07   85  #ifdef CONFIG_PM_SLEEP
55c82a6c drivers/ata/sata_sis.c  Alan                      2014-01-01   86  	.suspend		= ata_pci_device_suspend,
55c82a6c drivers/ata/sata_sis.c  Alan                      2014-01-01   87  	.resume			= ata_pci_device_resume,
55c82a6c drivers/ata/sata_sis.c  Alan                      2014-01-01   88  #endif
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   89  };
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   90  
193515d5 drivers/scsi/sata_sis.c Jeff Garzik               2005-11-07   91  static struct scsi_host_template sis_sht = {
68d1d07b drivers/ata/sata_sis.c  Tejun Heo                 2008-03-25   92  	ATA_BMDMA_SHT(DRV_NAME),
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   93  };
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   94  
029cfd6b drivers/ata/sata_sis.c  Tejun Heo                 2008-03-25   95  static struct ata_port_operations sis_ops = {
029cfd6b drivers/ata/sata_sis.c  Tejun Heo                 2008-03-25   96  	.inherits		= &ata_bmdma_port_ops,
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   97  	.scr_read		= sis_scr_read,
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   98  	.scr_write		= sis_scr_write,
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16   99  };
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  100  
1626aeb8 drivers/ata/sata_sis.c  Tejun Heo                 2007-05-04  101  static const struct ata_port_info sis_port_info = {
9cbe056f drivers/ata/sata_sis.c  Sergei Shtylyov           2011-02-04  102  	.flags		= ATA_FLAG_SATA,
14bdef98 drivers/ata/sata_sis.c  Erik Inge Bolsø           2009-03-14  103  	.pio_mask	= ATA_PIO4,
14bdef98 drivers/ata/sata_sis.c  Erik Inge Bolsø           2009-03-14  104  	.mwdma_mask	= ATA_MWDMA2,
bf6263a8 drivers/ata/sata_sis.c  Jeff Garzik               2007-07-09  105  	.udma_mask	= ATA_UDMA6,
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  106  	.port_ops	= &sis_ops,
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  107  };
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  108  
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  109  MODULE_AUTHOR("Uwe Koziolek");
142924cf drivers/ata/sata_sis.c  Chris Dunlop              2011-10-24  110  MODULE_DESCRIPTION("low-level driver for Silicon Integrated Systems SATA controller");
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  111  MODULE_LICENSE("GPL");
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  112  MODULE_DEVICE_TABLE(pci, sis_pci_tbl);
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  113  MODULE_VERSION(DRV_VERSION);
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  114  
72fee382 drivers/ata/sata_sis.c  Tejun Heo                 2009-09-01  115  static unsigned int get_scr_cfg_addr(struct ata_link *link, unsigned int sc_reg)
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  116  {
72fee382 drivers/ata/sata_sis.c  Tejun Heo                 2009-09-01  117  	struct ata_port *ap = link->ap;
9b14dec5 drivers/ata/sata_sis.c  Alan Cox                  2007-01-08  118  	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  119  	unsigned int addr = SIS_SCR_BASE + (4 * sc_reg);
9b14dec5 drivers/ata/sata_sis.c  Alan Cox                  2007-01-08  120  	u8 pmr;
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  121  
9b14dec5 drivers/ata/sata_sis.c  Alan Cox                  2007-01-08  122  	if (ap->port_no)  {
3f3e7313 drivers/ata/sata_sis.c  Uwe Koziolek              2006-12-04  123  		switch (pdev->device) {
3f3e7313 drivers/ata/sata_sis.c  Uwe Koziolek              2006-12-04  124  		case 0x0180:
3f3e7313 drivers/ata/sata_sis.c  Uwe Koziolek              2006-12-04  125  		case 0x0181:
9b14dec5 drivers/ata/sata_sis.c  Alan Cox                  2007-01-08  126  			pci_read_config_byte(pdev, SIS_PMR, &pmr);
9b14dec5 drivers/ata/sata_sis.c  Alan Cox                  2007-01-08  127  			if ((pmr & SIS_PMR_COMBINED) == 0)
f2c853bc drivers/scsi/sata_sis.c Arnaud Patard             2005-09-07  128  				addr += SIS180_SATA1_OFS;
3f3e7313 drivers/ata/sata_sis.c  Uwe Koziolek              2006-12-04  129  			break;
8add7885 drivers/scsi/sata_sis.c Jeff Garzik               2005-09-08  130  
3f3e7313 drivers/ata/sata_sis.c  Uwe Koziolek              2006-12-04  131  		case 0x0182:
3f3e7313 drivers/ata/sata_sis.c  Uwe Koziolek              2006-12-04  132  		case 0x0183:
3f3e7313 drivers/ata/sata_sis.c  Uwe Koziolek              2006-12-04  133  		case 0x1182:
3f3e7313 drivers/ata/sata_sis.c  Uwe Koziolek              2006-12-04  134  			addr += SIS182_SATA1_OFS;
3f3e7313 drivers/ata/sata_sis.c  Uwe Koziolek              2006-12-04  135  			break;
3f3e7313 drivers/ata/sata_sis.c  Uwe Koziolek              2006-12-04  136  		}
3f3e7313 drivers/ata/sata_sis.c  Uwe Koziolek              2006-12-04  137  	}
72fee382 drivers/ata/sata_sis.c  Tejun Heo                 2009-09-01  138  	if (link->pmp)
72fee382 drivers/ata/sata_sis.c  Tejun Heo                 2009-09-01  139  		addr += 0x10;
72fee382 drivers/ata/sata_sis.c  Tejun Heo                 2009-09-01  140  
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  141  	return addr;
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  142  }
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  143  
82ef04fb drivers/ata/sata_sis.c  Tejun Heo                 2008-07-31  144  static u32 sis_scr_cfg_read(struct ata_link *link,
82ef04fb drivers/ata/sata_sis.c  Tejun Heo                 2008-07-31  145  			    unsigned int sc_reg, u32 *val)
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  146  {
82ef04fb drivers/ata/sata_sis.c  Tejun Heo                 2008-07-31  147  	struct pci_dev *pdev = to_pci_dev(link->ap->host->dev);
72fee382 drivers/ata/sata_sis.c  Tejun Heo                 2009-09-01  148  	unsigned int cfg_addr = get_scr_cfg_addr(link, sc_reg);
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  149  
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  150  	if (sc_reg == SCR_ERROR) /* doesn't exist in PCI cfg space */
8e5443a0 drivers/ata/sata_sis.c  Tejun Heo                 2008-04-24  151  		return -EINVAL;
f2c853bc drivers/scsi/sata_sis.c Arnaud Patard             2005-09-07  152  
aaa092a1 drivers/ata/sata_sis.c  Tejun Heo                 2007-10-18  153  	pci_read_config_dword(pdev, cfg_addr, val);
aaa092a1 drivers/ata/sata_sis.c  Tejun Heo                 2007-10-18  154  	return 0;
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  155  }
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  156  
82ef04fb drivers/ata/sata_sis.c  Tejun Heo                 2008-07-31  157  static int sis_scr_cfg_write(struct ata_link *link,
82ef04fb drivers/ata/sata_sis.c  Tejun Heo                 2008-07-31  158  			     unsigned int sc_reg, u32 val)
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  159  {
82ef04fb drivers/ata/sata_sis.c  Tejun Heo                 2008-07-31  160  	struct pci_dev *pdev = to_pci_dev(link->ap->host->dev);
72fee382 drivers/ata/sata_sis.c  Tejun Heo                 2009-09-01  161  	unsigned int cfg_addr = get_scr_cfg_addr(link, sc_reg);
f2c853bc drivers/scsi/sata_sis.c Arnaud Patard             2005-09-07  162  
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  163  	pci_write_config_dword(pdev, cfg_addr, val);
8e5443a0 drivers/ata/sata_sis.c  Tejun Heo                 2008-04-24  164  	return 0;
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  165  }
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  166  
82ef04fb drivers/ata/sata_sis.c  Tejun Heo                 2008-07-31  167  static int sis_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val)
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  168  {
82ef04fb drivers/ata/sata_sis.c  Tejun Heo                 2008-07-31  169  	struct ata_port *ap = link->ap;
72fee382 drivers/ata/sata_sis.c  Tejun Heo                 2009-09-01  170  	void __iomem *base = ap->ioaddr.scr_addr + link->pmp * 0x10;
f2c853bc drivers/scsi/sata_sis.c Arnaud Patard             2005-09-07  171  
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  172  	if (sc_reg > SCR_CONTROL)
da3dbb17 drivers/ata/sata_sis.c  Tejun Heo                 2007-07-16  173  		return -EINVAL;
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  174  
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  175  	if (ap->flags & SIS_FLAG_CFGSCR)
82ef04fb drivers/ata/sata_sis.c  Tejun Heo                 2008-07-31  176  		return sis_scr_cfg_read(link, sc_reg, val);
f2c853bc drivers/scsi/sata_sis.c Arnaud Patard             2005-09-07  177  
72fee382 drivers/ata/sata_sis.c  Tejun Heo                 2009-09-01  178  	*val = ioread32(base + sc_reg * 4);
da3dbb17 drivers/ata/sata_sis.c  Tejun Heo                 2007-07-16  179  	return 0;
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  180  }
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  181  
82ef04fb drivers/ata/sata_sis.c  Tejun Heo                 2008-07-31  182  static int sis_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val)
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  183  {
82ef04fb drivers/ata/sata_sis.c  Tejun Heo                 2008-07-31  184  	struct ata_port *ap = link->ap;
72fee382 drivers/ata/sata_sis.c  Tejun Heo                 2009-09-01  185  	void __iomem *base = ap->ioaddr.scr_addr + link->pmp * 0x10;
f2c853bc drivers/scsi/sata_sis.c Arnaud Patard             2005-09-07  186  
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  187  	if (sc_reg > SCR_CONTROL)
da3dbb17 drivers/ata/sata_sis.c  Tejun Heo                 2007-07-16  188  		return -EINVAL;
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  189  
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  190  	if (ap->flags & SIS_FLAG_CFGSCR)
82ef04fb drivers/ata/sata_sis.c  Tejun Heo                 2008-07-31  191  		return sis_scr_cfg_write(link, sc_reg, val);
72fee382 drivers/ata/sata_sis.c  Tejun Heo                 2009-09-01  192  
72fee382 drivers/ata/sata_sis.c  Tejun Heo                 2009-09-01  193  	iowrite32(val, base + (sc_reg * 4));
da3dbb17 drivers/ata/sata_sis.c  Tejun Heo                 2007-07-16  194  	return 0;
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  195  }
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  196  
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  197  static int sis_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  198  {
9a829ccf drivers/ata/sata_sis.c  Tejun Heo                 2007-04-17  199  	struct ata_port_info pi = sis_port_info;
ddfc87a0 drivers/ata/sata_sis.c  Uwe Koziolek              2007-05-25  200  	const struct ata_port_info *ppi[] = { &pi, &pi };
9a829ccf drivers/ata/sata_sis.c  Tejun Heo                 2007-04-17  201  	struct ata_host *host;
4adccf6f drivers/ata/sata_sis.c  Uwe Koziolek              2006-11-08  202  	u32 genctl, val;
f2c853bc drivers/scsi/sata_sis.c Arnaud Patard             2005-09-07  203  	u8 pmr;
3f3e7313 drivers/ata/sata_sis.c  Uwe Koziolek              2006-12-04  204  	u8 port2_start = 0x20;
72fee382 drivers/ata/sata_sis.c  Tejun Heo                 2009-09-01  205  	int i, rc;
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  206  
06296a1e drivers/ata/sata_sis.c  Joe Perches               2011-04-15  207  	ata_print_version_once(&pdev->dev, DRV_VERSION);
a9524a76 drivers/scsi/sata_sis.c Jeff Garzik               2005-10-30  208  
24dc5f33 drivers/ata/sata_sis.c  Tejun Heo                 2007-01-20  209  	rc = pcim_enable_device(pdev);
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  210  	if (rc)
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  211  		return rc;
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  212  
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  213  	/* check and see if the SCRs are in IO space or PCI cfg space */
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  214  	pci_read_config_dword(pdev, SIS_GENCTL, &genctl);
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  215  	if ((genctl & GENCTL_IOMAPPED_SCR) == 0)
cf0e812f drivers/ata/sata_sis.c  Tejun Heo                 2006-10-27  216  		pi.flags |= SIS_FLAG_CFGSCR;
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  217  
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  218  	/* if hardware thinks SCRs are in IO space, but there are
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  219  	 * no IO resources assigned, change to PCI cfg space.
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  220  	 */
cf0e812f drivers/ata/sata_sis.c  Tejun Heo                 2006-10-27  221  	if ((!(pi.flags & SIS_FLAG_CFGSCR)) &&
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  222  	    ((pci_resource_start(pdev, SIS_SCR_PCI_BAR) == 0) ||
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16 @223  	     (pci_resource_len(pdev, SIS_SCR_PCI_BAR) < 128))) {
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  224  		genctl &= ~GENCTL_IOMAPPED_SCR;
^1da177e drivers/scsi/sata_sis.c Linus Torvalds            2005-04-16  225  		pci_write_config_dword(pdev, SIS_GENCTL, genctl);
cf0e812f drivers/ata/sata_sis.c  Tejun Heo                 2006-10-27  226  		pi.flags |= SIS_FLAG_CFGSCR;

:::::: The code at line 223 was first introduced by commit
:::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2

:::::: TO: Linus Torvalds <torvalds@ppc970.osdl.org>
:::::: CC: Linus Torvalds <torvalds@ppc970.osdl.org>

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
diff mbox

Patch

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 220c31e..04f2100 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -5096,6 +5096,7 @@  void pci_reassigndev_resource_alignment(struct pci_dev *dev)
 
 		size = resource_size(r);
 		if (size < align) {
+			dev->res_addsize[i] = align - size;
 			size = align;
 			dev_info(&dev->dev,
 				"Rounding up size of resource #%d to %#llx.\n",
diff --git a/include/linux/pci.h b/include/linux/pci.h
index e2d1a12..e4099fb 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -334,6 +334,7 @@  struct pci_dev {
 	 */
 	unsigned int	irq;
 	struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */
+	resource_size_t res_addsize[PCI_ROM_RESOURCE + 1];
 
 	bool match_driver;		/* Skip attaching driver */
 	/* These fields are used by common fixups */
@@ -1644,7 +1645,10 @@  static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
 /* these helpers provide future and backwards compatibility
  * for accessing popular PCI BAR info */
 #define pci_resource_start(dev, bar)	((dev)->resource[(bar)].start)
-#define pci_resource_end(dev, bar)	((dev)->resource[(bar)].end)
+#define pci_resource_end(dev, bar)	(((bar) > PCI_ROM_RESOURCE) ?	\
+					(dev)->resource[(bar)].end :	\
+					((dev)->resource[(bar)].end -	\
+					(dev)->res_addsize[(bar)]))
 #define pci_resource_flags(dev, bar)	((dev)->resource[(bar)].flags)
 #define pci_resource_len(dev,bar) \
 	((pci_resource_start((dev), (bar)) == 0 &&	\