mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-24 03:50:53 +07:00
6904945420
Use dev_printk() when possible to include device and driver information in the conventional format. Add "#define dev_fmt" when needed to preserve DRV_NAME or KBUILD_MODNAME in messages. No functional change intended. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Link: https://lore.kernel.org/r/20200527174326.254329-2-helgaas@kernel.org Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
143 lines
3.1 KiB
C
143 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* PCI Backend - Handle special overlays for broken devices.
|
|
*
|
|
* Author: Ryan Wilson <hap9@epoch.ncsc.mil>
|
|
* Author: Chris Bookholt <hap10@epoch.ncsc.mil>
|
|
*/
|
|
|
|
#define dev_fmt(fmt) DRV_NAME ": " fmt
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/pci.h>
|
|
#include "pciback.h"
|
|
#include "conf_space.h"
|
|
#include "conf_space_quirks.h"
|
|
|
|
LIST_HEAD(xen_pcibk_quirks);
|
|
static inline const struct pci_device_id *
|
|
match_one_device(const struct pci_device_id *id, const struct pci_dev *dev)
|
|
{
|
|
if ((id->vendor == PCI_ANY_ID || id->vendor == dev->vendor) &&
|
|
(id->device == PCI_ANY_ID || id->device == dev->device) &&
|
|
(id->subvendor == PCI_ANY_ID ||
|
|
id->subvendor == dev->subsystem_vendor) &&
|
|
(id->subdevice == PCI_ANY_ID ||
|
|
id->subdevice == dev->subsystem_device) &&
|
|
!((id->class ^ dev->class) & id->class_mask))
|
|
return id;
|
|
return NULL;
|
|
}
|
|
|
|
static struct xen_pcibk_config_quirk *xen_pcibk_find_quirk(struct pci_dev *dev)
|
|
{
|
|
struct xen_pcibk_config_quirk *tmp_quirk;
|
|
|
|
list_for_each_entry(tmp_quirk, &xen_pcibk_quirks, quirks_list)
|
|
if (match_one_device(&tmp_quirk->devid, dev) != NULL)
|
|
goto out;
|
|
tmp_quirk = NULL;
|
|
dev_printk(KERN_DEBUG, &dev->dev,
|
|
"quirk didn't match any device known\n");
|
|
out:
|
|
return tmp_quirk;
|
|
}
|
|
|
|
static inline void register_quirk(struct xen_pcibk_config_quirk *quirk)
|
|
{
|
|
list_add_tail(&quirk->quirks_list, &xen_pcibk_quirks);
|
|
}
|
|
|
|
int xen_pcibk_field_is_dup(struct pci_dev *dev, unsigned int reg)
|
|
{
|
|
int ret = 0;
|
|
struct xen_pcibk_dev_data *dev_data = pci_get_drvdata(dev);
|
|
struct config_field_entry *cfg_entry;
|
|
|
|
list_for_each_entry(cfg_entry, &dev_data->config_fields, list) {
|
|
if (OFFSET(cfg_entry) == reg) {
|
|
ret = 1;
|
|
break;
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int xen_pcibk_config_quirks_add_field(struct pci_dev *dev, struct config_field
|
|
*field)
|
|
{
|
|
int err = 0;
|
|
|
|
switch (field->size) {
|
|
case 1:
|
|
field->u.b.read = xen_pcibk_read_config_byte;
|
|
field->u.b.write = xen_pcibk_write_config_byte;
|
|
break;
|
|
case 2:
|
|
field->u.w.read = xen_pcibk_read_config_word;
|
|
field->u.w.write = xen_pcibk_write_config_word;
|
|
break;
|
|
case 4:
|
|
field->u.dw.read = xen_pcibk_read_config_dword;
|
|
field->u.dw.write = xen_pcibk_write_config_dword;
|
|
break;
|
|
default:
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
xen_pcibk_config_add_field(dev, field);
|
|
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
int xen_pcibk_config_quirks_init(struct pci_dev *dev)
|
|
{
|
|
struct xen_pcibk_config_quirk *quirk;
|
|
int ret = 0;
|
|
|
|
quirk = kzalloc(sizeof(*quirk), GFP_KERNEL);
|
|
if (!quirk) {
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
quirk->devid.vendor = dev->vendor;
|
|
quirk->devid.device = dev->device;
|
|
quirk->devid.subvendor = dev->subsystem_vendor;
|
|
quirk->devid.subdevice = dev->subsystem_device;
|
|
quirk->devid.class = 0;
|
|
quirk->devid.class_mask = 0;
|
|
quirk->devid.driver_data = 0UL;
|
|
|
|
quirk->pdev = dev;
|
|
|
|
register_quirk(quirk);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
void xen_pcibk_config_field_free(struct config_field *field)
|
|
{
|
|
kfree(field);
|
|
}
|
|
|
|
int xen_pcibk_config_quirk_release(struct pci_dev *dev)
|
|
{
|
|
struct xen_pcibk_config_quirk *quirk;
|
|
int ret = 0;
|
|
|
|
quirk = xen_pcibk_find_quirk(dev);
|
|
if (!quirk) {
|
|
ret = -ENXIO;
|
|
goto out;
|
|
}
|
|
|
|
list_del(&quirk->quirks_list);
|
|
kfree(quirk);
|
|
|
|
out:
|
|
return ret;
|
|
}
|