diff options
| author | Mike Travis <travis@sgi.com> | 2010-02-02 14:38:13 -0800 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2010-02-05 14:05:41 -0800 |
| commit | 95a8b6efc5d07103583f706c8a5889437d537939 (patch) | |
| tree | a8e9161eea03b0eb21e838826c547771158ecdce /drivers/pci/pci.c | |
| parent | 499a2673713c85734a54c37dd90b4b729de399c4 (diff) | |
pci: Update pci_set_vga_state() to call arch functions
Update pci_set_vga_state to call arch dependent functions to enable Legacy
VGA I/O transactions to be redirected to correct target.
[akpm@linux-foundation.org: make pci_register_set_vga_state() __init]
Signed-off-by: Mike Travis <travis@sgi.com>
LKML-Reference: <201002022238.o12McE1J018723@imap1.linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Robin Holt <holt@sgi.com>
Cc: Jack Steiner <steiner@sgi.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: David Airlie <airlied@linux.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'drivers/pci/pci.c')
| -rw-r--r-- | drivers/pci/pci.c | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 315fea47e78..ac2a576133f 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -2615,6 +2615,23 @@ int pci_resource_bar(struct pci_dev *dev, int resno, enum pci_bar_type *type) return 0; } +/* Some architectures require additional programming to enable VGA */ +static arch_set_vga_state_t arch_set_vga_state; + +void __init pci_register_set_vga_state(arch_set_vga_state_t func) +{ + arch_set_vga_state = func; /* NULL disables */ +} + +static int pci_set_vga_state_arch(struct pci_dev *dev, bool decode, + unsigned int command_bits, bool change_bridge) +{ + if (arch_set_vga_state) + return arch_set_vga_state(dev, decode, command_bits, + change_bridge); + return 0; +} + /** * pci_set_vga_state - set VGA decode state on device and parents if requested * @dev: the PCI device @@ -2628,9 +2645,15 @@ int pci_set_vga_state(struct pci_dev *dev, bool decode, struct pci_bus *bus; struct pci_dev *bridge; u16 cmd; + int rc; WARN_ON(command_bits & ~(PCI_COMMAND_IO|PCI_COMMAND_MEMORY)); + /* ARCH specific VGA enables */ + rc = pci_set_vga_state_arch(dev, decode, command_bits, change_bridge); + if (rc) + return rc; + pci_read_config_word(dev, PCI_COMMAND, &cmd); if (decode == true) cmd |= command_bits; @@ -2845,6 +2868,7 @@ EXPORT_SYMBOL(pcim_pin_device); EXPORT_SYMBOL(pci_disable_device); EXPORT_SYMBOL(pci_find_capability); EXPORT_SYMBOL(pci_bus_find_capability); +EXPORT_SYMBOL(pci_register_set_vga_state); EXPORT_SYMBOL(pci_release_regions); EXPORT_SYMBOL(pci_request_regions); EXPORT_SYMBOL(pci_request_regions_exclusive); @@ -2877,4 +2901,3 @@ EXPORT_SYMBOL(pci_target_state); EXPORT_SYMBOL(pci_prepare_to_sleep); EXPORT_SYMBOL(pci_back_from_sleep); EXPORT_SYMBOL_GPL(pci_set_pcie_reset_state); - |