Messages in this thread Patch in this message | | | Date | Mon, 12 Aug 2002 17:08:24 -0700 | From | Matthew Dobson <> | Subject | [patch] PCI Cleanup |
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Linus, Alan, et al.
Here's a patch I'd like to see included in the 2.5 mainline. Some of the code in arch/i386/pci/direct.c is a bit ugly and definitely redundant. This patch cleans that up. I've tested in on PCI configuration 1 systems, but I haven't had a chance to test this on any systems that use PCI configuration 2. If anyone can do that, that would be awesome.
[mcd@arrakis src]$ diffstat pci_fix-2531.patch direct.c | 158 +++++++++++++++++++-------------------------------------------- 1 files changed, 48 insertions(+), 110 deletions(-)
The gist of the patch is that it move the indirection one layer down and saves about 60+ lines of code. Rather than having pci_conf{1|2}_{read|write}_config_{byte|word|dword}, this patch removes the 1/2 distinction by pushing that down a layer, and calling a generic pointer instead. That pointer is set at init time by the PCI init code. This pulls out 6 functions (pci_conf2_*) that were exact duplicates of the others (pci_conf1_*), but differed by 1 character each (s/conf1/conf2/).
Linus, please apply...
Cheers!
-Matt diff -Nur linux-2.5.30-vanilla/arch/i386/pci/direct.c linux-2.5.30-patched/arch/i386/pci/direct.c --- linux-2.5.30-vanilla/arch/i386/pci/direct.c Thu Aug 1 14:16:14 2002 +++ linux-2.5.30-patched/arch/i386/pci/direct.c Mon Aug 12 10:41:32 2002 @@ -69,76 +69,8 @@ return 0; } - #undef PCI_CONF1_ADDRESS -static int pci_conf1_read_config_byte(struct pci_dev *dev, int where, u8 *value) -{ - int result; - u32 data; - - if (!value) - return -EINVAL; - - result = pci_conf1_read(0, dev->bus->number, PCI_SLOT(dev->devfn), - PCI_FUNC(dev->devfn), where, 1, &data); - - *value = (u8)data; - - return result; -} - -static int pci_conf1_read_config_word(struct pci_dev *dev, int where, u16 *value) -{ - int result; - u32 data; - - if (!value) - return -EINVAL; - - result = pci_conf1_read(0, dev->bus->number, PCI_SLOT(dev->devfn), - PCI_FUNC(dev->devfn), where, 2, &data); - - *value = (u16)data; - - return result; -} - -static int pci_conf1_read_config_dword(struct pci_dev *dev, int where, u32 *value) -{ - if (!value) - return -EINVAL; - - return pci_conf1_read(0, dev->bus->number, PCI_SLOT(dev->devfn), - PCI_FUNC(dev->devfn), where, 4, value); -} - -static int pci_conf1_write_config_byte(struct pci_dev *dev, int where, u8 value) -{ - return pci_conf1_write(0, dev->bus->number, PCI_SLOT(dev->devfn), - PCI_FUNC(dev->devfn), where, 1, value); -} - -static int pci_conf1_write_config_word(struct pci_dev *dev, int where, u16 value) -{ - return pci_conf1_write(0, dev->bus->number, PCI_SLOT(dev->devfn), - PCI_FUNC(dev->devfn), where, 2, value); -} - -static int pci_conf1_write_config_dword(struct pci_dev *dev, int where, u32 value) -{ - return pci_conf1_write(0, dev->bus->number, PCI_SLOT(dev->devfn), - PCI_FUNC(dev->devfn), where, 4, value); -} - -static struct pci_ops pci_direct_conf1 = { - pci_conf1_read_config_byte, - pci_conf1_read_config_word, - pci_conf1_read_config_dword, - pci_conf1_write_config_byte, - pci_conf1_write_config_word, - pci_conf1_write_config_dword -}; /* @@ -217,57 +149,70 @@ #undef PCI_CONF2_ADDRESS -static int pci_conf2_read_config_byte(struct pci_dev *dev, int where, u8 *value) + + +static int pci_config_read_byte(struct pci_dev *dev, int where, u8 *value) { int result; u32 data; - result = pci_conf2_read(0, dev->bus->number, PCI_SLOT(dev->devfn), + + if (!value) + return -EINVAL; + + result = pci_config_read(0, dev->bus->number, PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn), where, 1, &data); *value = (u8)data; return result; } -static int pci_conf2_read_config_word(struct pci_dev *dev, int where, u16 *value) +static int pci_config_read_word(struct pci_dev *dev, int where, u16 *value) { int result; u32 data; - result = pci_conf2_read(0, dev->bus->number, PCI_SLOT(dev->devfn), + + if (!value) + return -EINVAL; + + result = pci_config_read(0, dev->bus->number, PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn), where, 2, &data); *value = (u16)data; return result; } -static int pci_conf2_read_config_dword(struct pci_dev *dev, int where, u32 *value) +static int pci_config_read_dword(struct pci_dev *dev, int where, u32 *value) { - return pci_conf2_read(0, dev->bus->number, PCI_SLOT(dev->devfn), + if (!value) + return -EINVAL; + + return pci_config_read(0, dev->bus->number, PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn), where, 4, value); } -static int pci_conf2_write_config_byte(struct pci_dev *dev, int where, u8 value) +static int pci_config_write_byte(struct pci_dev *dev, int where, u8 value) { - return pci_conf2_write(0, dev->bus->number, PCI_SLOT(dev->devfn), + return pci_config_write(0, dev->bus->number, PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn), where, 1, value); } -static int pci_conf2_write_config_word(struct pci_dev *dev, int where, u16 value) +static int pci_config_write_word(struct pci_dev *dev, int where, u16 value) { - return pci_conf2_write(0, dev->bus->number, PCI_SLOT(dev->devfn), + return pci_config_write(0, dev->bus->number, PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn), where, 2, value); } -static int pci_conf2_write_config_dword(struct pci_dev *dev, int where, u32 value) +static int pci_config_write_dword(struct pci_dev *dev, int where, u32 value) { - return pci_conf2_write(0, dev->bus->number, PCI_SLOT(dev->devfn), + return pci_config_write(0, dev->bus->number, PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn), where, 4, value); } -static struct pci_ops pci_direct_conf2 = { - pci_conf2_read_config_byte, - pci_conf2_read_config_word, - pci_conf2_read_config_dword, - pci_conf2_write_config_byte, - pci_conf2_write_config_word, - pci_conf2_write_config_dword +static struct pci_ops pci_direct = { + pci_config_read_byte, + pci_config_read_word, + pci_config_read_dword, + pci_config_write_byte, + pci_config_write_word, + pci_config_write_dword }; @@ -301,7 +246,7 @@ return 0; } -static struct pci_ops * __devinit pci_check_direct(void) +static int __init pci_direct_init(void) { unsigned int tmp; unsigned long flags; @@ -312,17 +257,21 @@ * Check if configuration type 1 works. */ if (pci_probe & PCI_PROBE_CONF1) { + pci_config_read = pci_conf1_read; + pci_config_write = pci_conf1_write; outb (0x01, 0xCFB); tmp = inl (0xCF8); outl (0x80000000, 0xCF8); if (inl (0xCF8) == 0x80000000 && - pci_sanity_check(&pci_direct_conf1)) { + pci_sanity_check(&pci_direct)) { outl (tmp, 0xCF8); local_irq_restore(flags); printk(KERN_INFO "PCI: Using configuration type 1\n"); if (!request_region(0xCF8, 8, "PCI conf1")) - return NULL; - return &pci_direct_conf1; + pci_root_ops = NULL; + else + pci_root_ops = &pci_direct; + return 0; } outl (tmp, 0xCF8); } @@ -331,36 +280,25 @@ * Check if configuration type 2 works. */ if (pci_probe & PCI_PROBE_CONF2) { + pci_config_read = pci_conf2_read; + pci_config_write = pci_conf2_write; outb (0x00, 0xCFB); outb (0x00, 0xCF8); outb (0x00, 0xCFA); if (inb (0xCF8) == 0x00 && inb (0xCFA) == 0x00 && - pci_sanity_check(&pci_direct_conf2)) { + pci_sanity_check(&pci_direct)) { local_irq_restore(flags); printk(KERN_INFO "PCI: Using configuration type 2\n"); if (!request_region(0xCF8, 4, "PCI conf2")) - return NULL; - return &pci_direct_conf2; + pci_root_ops = NULL; + else + pci_root_ops = &pci_direct; + return 0; } } local_irq_restore(flags); - return NULL; -} - -static int __init pci_direct_init(void) -{ - if ((pci_probe & (PCI_PROBE_CONF1 | PCI_PROBE_CONF2)) - && (pci_root_ops = pci_check_direct())) { - if (pci_root_ops == &pci_direct_conf1) { - pci_config_read = pci_conf1_read; - pci_config_write = pci_conf1_write; - } - else { - pci_config_read = pci_conf2_read; - pci_config_write = pci_conf2_write; - } - } + pci_root_ops = NULL; return 0; } | |