diff options
| author | Bjorn Helgaas <bhelgaas@google.com> | 2012-06-13 17:04:54 -0600 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2012-06-13 17:04:54 -0600 |
| commit | cc2fa3fa320d5f40a12713c104bbe5d3da4636e4 (patch) | |
| tree | 342445a784c566116505ab8c9e7a24803a6e70c4 /include/linux/pci.h | |
| parent | 10c480933d0ad2ea27630cbaa723a5d33dbece00 (diff) | |
| parent | a0dee2ed0cdc666b5622f1fc74979355a6b36850 (diff) | |
Merge branch 'topic/alex-vfio-prep' into next
* topic/alex-vfio-prep:
PCI: misc pci_reg additions
PCI: create common pcibios_err_to_errno
PCI: export pci_user functions for use by other drivers
PCI: add ACS validation utility
PCI: add PCI DMA source ID quirk
Diffstat (limited to 'include/linux/pci.h')
| -rw-r--r-- | include/linux/pci.h | 52 |
1 files changed, 51 insertions, 1 deletions
diff --git a/include/linux/pci.h b/include/linux/pci.h index 27da5ce4628..35884f279bb 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -475,6 +475,32 @@ static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev) { return false; #define PCIBIOS_SET_FAILED 0x88 #define PCIBIOS_BUFFER_TOO_SMALL 0x89 +/* + * Translate above to generic errno for passing back through non-pci. + */ +static inline int pcibios_err_to_errno(int err) +{ + if (err <= PCIBIOS_SUCCESSFUL) + return err; /* Assume already errno */ + + switch (err) { + case PCIBIOS_FUNC_NOT_SUPPORTED: + return -ENOENT; + case PCIBIOS_BAD_VENDOR_ID: + return -EINVAL; + case PCIBIOS_DEVICE_NOT_FOUND: + return -ENODEV; + case PCIBIOS_BAD_REGISTER_NUMBER: + return -EFAULT; + case PCIBIOS_SET_FAILED: + return -EIO; + case PCIBIOS_BUFFER_TOO_SMALL: + return -ENOSPC; + } + + return -ENOTTY; +} + /* Low-level architecture-dependent routines */ struct pci_ops { @@ -779,6 +805,14 @@ static inline int pci_write_config_dword(const struct pci_dev *dev, int where, return pci_bus_write_config_dword(dev->bus, dev->devfn, where, val); } +/* user-space driven config access */ +int pci_user_read_config_byte(struct pci_dev *dev, int where, u8 *val); +int pci_user_read_config_word(struct pci_dev *dev, int where, u16 *val); +int pci_user_read_config_dword(struct pci_dev *dev, int where, u32 *val); +int pci_user_write_config_byte(struct pci_dev *dev, int where, u8 val); +int pci_user_write_config_word(struct pci_dev *dev, int where, u16 val); +int pci_user_write_config_dword(struct pci_dev *dev, int where, u32 val); + int __must_check pci_enable_device(struct pci_dev *dev); int __must_check pci_enable_device_io(struct pci_dev *dev); int __must_check pci_enable_device_mem(struct pci_dev *dev); @@ -1334,6 +1368,9 @@ static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus, static inline int pci_domain_nr(struct pci_bus *bus) { return 0; } +static inline struct pci_dev *pci_dev_get(struct pci_dev *dev) +{ return NULL; } + #define dev_is_pci(d) (false) #define dev_is_pf(d) (false) #define dev_num_vf(d) (0) @@ -1488,9 +1525,20 @@ enum pci_fixup_pass { #ifdef CONFIG_PCI_QUIRKS void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev); +struct pci_dev *pci_get_dma_source(struct pci_dev *dev); +int pci_dev_specific_acs_enabled(struct pci_dev *dev, u16 acs_flags); #else static inline void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev) {} +static inline struct pci_dev *pci_get_dma_source(struct pci_dev *dev) +{ + return pci_dev_get(dev); +} +static inline int pci_dev_specific_acs_enabled(struct pci_dev *dev, + u16 acs_flags) +{ + return -ENOTTY; +} #endif void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen); @@ -1593,7 +1641,9 @@ static inline bool pci_is_pcie(struct pci_dev *dev) } void pci_request_acs(void); - +bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags); +bool pci_acs_path_enabled(struct pci_dev *start, + struct pci_dev *end, u16 acs_flags); #define PCI_VPD_LRDT 0x80 /* Large Resource Data Type */ #define PCI_VPD_LRDT_ID(x) (x | PCI_VPD_LRDT) |