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Merge branch 'pci/misc'

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- Constify pcibus_class (Heiner Kallweit)

- Annotate pci_cache_line_size variables as __ro_after_init (Heiner
  Kallweit)

- Clean up formatting of PCI accessor macros (Ilpo Järvinen)

- Remove some OLPC dead code (Kunwu Chan)

- Make pcie_bandwidth_capable() static (Ilpo Järvinen)

* pci/misc:
  PCI: Make pcie_bandwidth_capable() static
  x86/pci: Remove OLPC dead code
  PCI: Clean up accessor macro formatting
  PCI/ERR: Cleanup misleading indentation inside if conditions
  PCI: Annotate pci_cache_line_size variables as __ro_after_init
  PCI: Constify pcibus_class
This commit is contained in:
Bjorn Helgaas 2024-05-16 18:14:14 -05:00
commit 7ecf13fd35
6 changed files with 36 additions and 32 deletions
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3
arch/x86/pci/olpc.c
View File

@ -154,9 +154,6 @@ static const uint32_t ehci_hdr[] = { /* dev f function 4 - devfn = 7d */
0x0, 0x40, 0x0, 0x40a, /* CapPtr INT-D, IRQA */
0xc8020001, 0x0, 0x0, 0x0, /* Capabilities - 40 is R/O, 44 is
mask 8103 (power control) */
#if 0
0x1, 0x40080000, 0x0, 0x0, /* EECP - see EHCI spec section 2.1.7 */
#endif
0x01000001, 0x0, 0x0, 0x0, /* EECP - see EHCI spec section 2.1.7 */
0x2020, 0x0, 0x0, 0x0, /* (EHCI page 8) 60 SBRN (R/O),
61 FLADJ (R/W), PORTWAKECAP */

40
drivers/pci/access.c
View File

@ -36,10 +36,13 @@ DEFINE_RAW_SPINLOCK(pci_lock);
int noinline pci_bus_read_config_##size \
(struct pci_bus *bus, unsigned int devfn, int pos, type *value) \
{ \
int res; \
unsigned long flags; \
u32 data = 0; \
if (PCI_##size##_BAD) return PCIBIOS_BAD_REGISTER_NUMBER; \
int res; \
\
if (PCI_##size##_BAD) \
return PCIBIOS_BAD_REGISTER_NUMBER; \
\
pci_lock_config(flags); \
res = bus->ops->read(bus, devfn, pos, len, &data); \
if (res) \
@ -47,6 +50,7 @@ int noinline pci_bus_read_config_##size \
else \
*value = (type)data; \
pci_unlock_config(flags); \
\
return res; \
}
@ -54,12 +58,16 @@ int noinline pci_bus_read_config_##size \
int noinline pci_bus_write_config_##size \
(struct pci_bus *bus, unsigned int devfn, int pos, type value) \
{ \
int res; \
unsigned long flags; \
if (PCI_##size##_BAD) return PCIBIOS_BAD_REGISTER_NUMBER; \
int res; \
\
if (PCI_##size##_BAD) \
return PCIBIOS_BAD_REGISTER_NUMBER; \
\
pci_lock_config(flags); \
res = bus->ops->write(bus, devfn, pos, len, value); \
pci_unlock_config(flags); \
\
return res; \
}
@ -216,24 +224,27 @@ static noinline void pci_wait_cfg(struct pci_dev *dev)
}
/* Returns 0 on success, negative values indicate error. */
#define PCI_USER_READ_CONFIG(size, type) \
#define PCI_USER_READ_CONFIG(size, type) \
int pci_user_read_config_##size \
(struct pci_dev *dev, int pos, type *val) \
{ \
int ret = PCIBIOS_SUCCESSFUL; \
u32 data = -1; \
int ret; \
\
if (PCI_##size##_BAD) \
return -EINVAL; \
raw_spin_lock_irq(&pci_lock); \
\
raw_spin_lock_irq(&pci_lock); \
if (unlikely(dev->block_cfg_access)) \
pci_wait_cfg(dev); \
ret = dev->bus->ops->read(dev->bus, dev->devfn, \
pos, sizeof(type), &data); \
raw_spin_unlock_irq(&pci_lock); \
pos, sizeof(type), &data); \
raw_spin_unlock_irq(&pci_lock); \
if (ret) \
PCI_SET_ERROR_RESPONSE(val); \
else \
*val = (type)data; \
\
return pcibios_err_to_errno(ret); \
} \
EXPORT_SYMBOL_GPL(pci_user_read_config_##size);
@ -243,15 +254,18 @@ EXPORT_SYMBOL_GPL(pci_user_read_config_##size);
int pci_user_write_config_##size \
(struct pci_dev *dev, int pos, type val) \
{ \
int ret = PCIBIOS_SUCCESSFUL; \
int ret; \
\
if (PCI_##size##_BAD) \
return -EINVAL; \
raw_spin_lock_irq(&pci_lock); \
\
raw_spin_lock_irq(&pci_lock); \
if (unlikely(dev->block_cfg_access)) \
pci_wait_cfg(dev); \
ret = dev->bus->ops->write(dev->bus, dev->devfn, \
pos, sizeof(type), val); \
raw_spin_unlock_irq(&pci_lock); \
pos, sizeof(type), val); \
raw_spin_unlock_irq(&pci_lock); \
\
return pcibios_err_to_errno(ret); \
} \
EXPORT_SYMBOL_GPL(pci_user_write_config_##size);

9
drivers/pci/pci.c
View File

@ -142,8 +142,8 @@ enum pcie_bus_config_types pcie_bus_config = PCIE_BUS_DEFAULT;
* the dfl or actual value as it sees fit. Don't forget this is
* measured in 32-bit words, not bytes.
*/
u8 pci_dfl_cache_line_size = L1_CACHE_BYTES >> 2;
u8 pci_cache_line_size;
u8 pci_dfl_cache_line_size __ro_after_init = L1_CACHE_BYTES >> 2;
u8 pci_cache_line_size __ro_after_init ;
/*
* If we set up a device for bus mastering, we need to check the latency
@ -6163,8 +6163,9 @@ EXPORT_SYMBOL(pcie_get_width_cap);
* and width, multiplying them, and applying encoding overhead. The result
* is in Mb/s, i.e., megabits/second of raw bandwidth.
*/
u32 pcie_bandwidth_capable(struct pci_dev *dev, enum pci_bus_speed *speed,
enum pcie_link_width *width)
static u32 pcie_bandwidth_capable(struct pci_dev *dev,
enum pci_bus_speed *speed,
enum pcie_link_width *width)
{
*speed = pcie_get_speed_cap(dev);
*width = pcie_get_width_cap(dev);

2
drivers/pci/pci.h
View File

@ -293,8 +293,6 @@ void pci_bus_put(struct pci_bus *bus);
const char *pci_speed_string(enum pci_bus_speed speed);
enum pci_bus_speed pcie_get_speed_cap(struct pci_dev *dev);
enum pcie_link_width pcie_get_width_cap(struct pci_dev *dev);
u32 pcie_bandwidth_capable(struct pci_dev *dev, enum pci_bus_speed *speed,
enum pcie_link_width *width);
void __pcie_print_link_status(struct pci_dev *dev, bool verbose);
void pcie_report_downtraining(struct pci_dev *dev);
void pcie_update_link_speed(struct pci_bus *bus, u16 link_status);

12
drivers/pci/pcie/err.c
View File

@ -116,9 +116,7 @@ static int report_mmio_enabled(struct pci_dev *dev, void *data)
device_lock(&dev->dev);
pdrv = dev->driver;
if (!pdrv ||
!pdrv->err_handler ||
!pdrv->err_handler->mmio_enabled)
if (!pdrv || !pdrv->err_handler || !pdrv->err_handler->mmio_enabled)
goto out;
err_handler = pdrv->err_handler;
@ -137,9 +135,7 @@ static int report_slot_reset(struct pci_dev *dev, void *data)
device_lock(&dev->dev);
pdrv = dev->driver;
if (!pdrv ||
!pdrv->err_handler ||
!pdrv->err_handler->slot_reset)
if (!pdrv || !pdrv->err_handler || !pdrv->err_handler->slot_reset)
goto out;
err_handler = pdrv->err_handler;
@ -158,9 +154,7 @@ static int report_resume(struct pci_dev *dev, void *data)
device_lock(&dev->dev);
pdrv = dev->driver;
if (!pci_dev_set_io_state(dev, pci_channel_io_normal) ||
!pdrv ||
!pdrv->err_handler ||
!pdrv->err_handler->resume)
!pdrv || !pdrv->err_handler || !pdrv->err_handler->resume)
goto out;
err_handler = pdrv->err_handler;

2
drivers/pci/probe.c
View File

@ -95,7 +95,7 @@ static void release_pcibus_dev(struct device *dev)
kfree(pci_bus);
}
static struct class pcibus_class = {
static const struct class pcibus_class = {
.name = "pci_bus",
.dev_release = &release_pcibus_dev,
.dev_groups = pcibus_groups,