Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Paul Mundt | 574 | 91.55% | 7 | 58.33% |
Kees Cook | 36 | 5.74% | 2 | 16.67% |
Ilpo Järvinen | 13 | 2.07% | 1 | 8.33% |
Geert Uytterhoeven | 3 | 0.48% | 1 | 8.33% |
Greg Kroah-Hartman | 1 | 0.16% | 1 | 8.33% |
Total | 627 | 12 |
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// SPDX-License-Identifier: GPL-2.0 #include <linux/pci.h> #include <linux/interrupt.h> #include <linux/timer.h> #include <linux/kernel.h> /* * These functions are used early on before PCI scanning is done * and all of the pci_dev and pci_bus structures have been created. */ static struct pci_dev *fake_pci_dev(struct pci_channel *hose, int top_bus, int busnr, int devfn) { static struct pci_dev dev; static struct pci_bus bus; dev.bus = &bus; dev.sysdata = hose; dev.devfn = devfn; bus.number = busnr; bus.sysdata = hose; bus.ops = hose->pci_ops; if(busnr != top_bus) /* Fake a parent bus structure. */ bus.parent = &bus; else bus.parent = NULL; return &dev; } #define EARLY_PCI_OP(rw, size, type) \ int __init early_##rw##_config_##size(struct pci_channel *hose, \ int top_bus, int bus, int devfn, int offset, type value) \ { \ return pci_##rw##_config_##size( \ fake_pci_dev(hose, top_bus, bus, devfn), \ offset, value); \ } EARLY_PCI_OP(read, byte, u8 *) EARLY_PCI_OP(read, word, u16 *) EARLY_PCI_OP(read, dword, u32 *) EARLY_PCI_OP(write, byte, u8) EARLY_PCI_OP(write, word, u16) EARLY_PCI_OP(write, dword, u32) int __init pci_is_66mhz_capable(struct pci_channel *hose, int top_bus, int current_bus) { u32 pci_devfn; u16 vid; int cap66 = -1; u16 stat; int ret; pr_info("PCI: Checking 66MHz capabilities...\n"); for (pci_devfn = 0; pci_devfn < 0xff; pci_devfn++) { if (PCI_FUNC(pci_devfn)) continue; ret = early_read_config_word(hose, top_bus, current_bus, pci_devfn, PCI_VENDOR_ID, &vid); if (ret != PCIBIOS_SUCCESSFUL) continue; if (PCI_POSSIBLE_ERROR(vid)) continue; /* check 66MHz capability */ if (cap66 < 0) cap66 = 1; if (cap66) { early_read_config_word(hose, top_bus, current_bus, pci_devfn, PCI_STATUS, &stat); if (!(stat & PCI_STATUS_66MHZ)) { printk(KERN_DEBUG "PCI: %02x:%02x not 66MHz capable.\n", current_bus, pci_devfn); cap66 = 0; break; } } } return cap66 > 0; } static void pcibios_enable_err(struct timer_list *t) { struct pci_channel *hose = from_timer(hose, t, err_timer); del_timer(&hose->err_timer); printk(KERN_DEBUG "PCI: re-enabling error IRQ.\n"); enable_irq(hose->err_irq); } static void pcibios_enable_serr(struct timer_list *t) { struct pci_channel *hose = from_timer(hose, t, serr_timer); del_timer(&hose->serr_timer); printk(KERN_DEBUG "PCI: re-enabling system error IRQ.\n"); enable_irq(hose->serr_irq); } void pcibios_enable_timers(struct pci_channel *hose) { if (hose->err_irq) { timer_setup(&hose->err_timer, pcibios_enable_err, 0); } if (hose->serr_irq) { timer_setup(&hose->serr_timer, pcibios_enable_serr, 0); } } /* * A simple handler for the regular PCI status errors, called from IRQ * context. */ unsigned int pcibios_handle_status_errors(unsigned long addr, unsigned int status, struct pci_channel *hose) { unsigned int cmd = 0; if (status & PCI_STATUS_REC_MASTER_ABORT) { printk(KERN_DEBUG "PCI: master abort, pc=0x%08lx\n", addr); cmd |= PCI_STATUS_REC_MASTER_ABORT; } if (status & PCI_STATUS_REC_TARGET_ABORT) { printk(KERN_DEBUG "PCI: target abort: "); pcibios_report_status(PCI_STATUS_REC_TARGET_ABORT | PCI_STATUS_SIG_TARGET_ABORT | PCI_STATUS_REC_MASTER_ABORT, 1); pr_cont("\n"); cmd |= PCI_STATUS_REC_TARGET_ABORT; } if (status & (PCI_STATUS_PARITY | PCI_STATUS_DETECTED_PARITY)) { printk(KERN_DEBUG "PCI: parity error detected: "); pcibios_report_status(PCI_STATUS_PARITY | PCI_STATUS_DETECTED_PARITY, 1); pr_cont("\n"); cmd |= PCI_STATUS_PARITY | PCI_STATUS_DETECTED_PARITY; /* Now back off of the IRQ for awhile */ if (hose->err_irq) { disable_irq_nosync(hose->err_irq); hose->err_timer.expires = jiffies + HZ; add_timer(&hose->err_timer); } } return cmd; }
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