diff options
Diffstat (limited to 'drivers/pci/pci.c')
| -rw-r--r-- | drivers/pci/pci.c | 126 |
1 files changed, 113 insertions, 13 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index e62de97304..c3585229c1 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -851,6 +851,66 @@ struct resource *pci_find_resource(struct pci_dev *dev, struct resource *res) EXPORT_SYMBOL(pci_find_resource); /** + * pci_resource_name - Return the name of the PCI resource + * @dev: PCI device to query + * @i: index of the resource + * + * Return the standard PCI resource (BAR) name according to their index. + */ +const char *pci_resource_name(struct pci_dev *dev, unsigned int i) +{ + static const char * const bar_name[] = { + "BAR 0", + "BAR 1", + "BAR 2", + "BAR 3", + "BAR 4", + "BAR 5", + "ROM", +#ifdef CONFIG_PCI_IOV + "VF BAR 0", + "VF BAR 1", + "VF BAR 2", + "VF BAR 3", + "VF BAR 4", + "VF BAR 5", +#endif + "bridge window", /* "io" included in %pR */ + "bridge window", /* "mem" included in %pR */ + "bridge window", /* "mem pref" included in %pR */ + }; + static const char * const cardbus_name[] = { + "BAR 1", + "unknown", + "unknown", + "unknown", + "unknown", + "unknown", +#ifdef CONFIG_PCI_IOV + "unknown", + "unknown", + "unknown", + "unknown", + "unknown", + "unknown", +#endif + "CardBus bridge window 0", /* I/O */ + "CardBus bridge window 1", /* I/O */ + "CardBus bridge window 0", /* mem */ + "CardBus bridge window 1", /* mem */ + }; + + if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS && + i < ARRAY_SIZE(cardbus_name)) + return cardbus_name[i]; + + if (i < ARRAY_SIZE(bar_name)) + return bar_name[i]; + + return "unknown"; +} + +/** * pci_wait_for_pending - wait for @mask bit(s) to clear in status word @pos * @dev: the PCI device to operate on * @pos: config space offset of status word @@ -1219,6 +1279,9 @@ static int pci_dev_wait(struct pci_dev *dev, char *reset_type, int timeout) if (delay > PCI_RESET_WAIT) pci_info(dev, "ready %dms after %s\n", delay - 1, reset_type); + else + pci_dbg(dev, "ready %dms after %s\n", delay - 1, + reset_type); return 0; } @@ -3329,6 +3392,7 @@ static struct resource *pci_ea_get_resource(struct pci_dev *dev, u8 bei, static int pci_ea_read(struct pci_dev *dev, int offset) { struct resource *res; + const char *res_name; int ent_size, ent_offset = offset; resource_size_t start, end; unsigned long flags; @@ -3358,6 +3422,7 @@ static int pci_ea_read(struct pci_dev *dev, int offset) goto out; res = pci_ea_get_resource(dev, bei, prop); + res_name = pci_resource_name(dev, bei); if (!res) { pci_err(dev, "Unsupported EA entry BEI: %u\n", bei); goto out; @@ -3431,16 +3496,16 @@ static int pci_ea_read(struct pci_dev *dev, int offset) res->flags = flags; if (bei <= PCI_EA_BEI_BAR5) - pci_info(dev, "BAR %d: %pR (from Enhanced Allocation, properties %#02x)\n", - bei, res, prop); + pci_info(dev, "%s %pR: from Enhanced Allocation, properties %#02x\n", + res_name, res, prop); else if (bei == PCI_EA_BEI_ROM) - pci_info(dev, "ROM: %pR (from Enhanced Allocation, properties %#02x)\n", - res, prop); + pci_info(dev, "%s %pR: from Enhanced Allocation, properties %#02x\n", + res_name, res, prop); else if (bei >= PCI_EA_BEI_VF_BAR0 && bei <= PCI_EA_BEI_VF_BAR5) - pci_info(dev, "VF BAR %d: %pR (from Enhanced Allocation, properties %#02x)\n", - bei - PCI_EA_BEI_VF_BAR0, res, prop); + pci_info(dev, "%s %pR: from Enhanced Allocation, properties %#02x\n", + res_name, res, prop); else - pci_info(dev, "BEI %d res: %pR (from Enhanced Allocation, properties %#02x)\n", + pci_info(dev, "BEI %d %pR: from Enhanced Allocation, properties %#02x\n", bei, res, prop); out: @@ -6263,6 +6328,41 @@ int pcie_set_mps(struct pci_dev *dev, int mps) } EXPORT_SYMBOL(pcie_set_mps); +static enum pci_bus_speed to_pcie_link_speed(u16 lnksta) +{ + return pcie_link_speed[FIELD_GET(PCI_EXP_LNKSTA_CLS, lnksta)]; +} + +int pcie_link_speed_mbps(struct pci_dev *pdev) +{ + u16 lnksta; + int err; + + err = pcie_capability_read_word(pdev, PCI_EXP_LNKSTA, &lnksta); + if (err) + return err; + + switch (to_pcie_link_speed(lnksta)) { + case PCIE_SPEED_2_5GT: + return 2500; + case PCIE_SPEED_5_0GT: + return 5000; + case PCIE_SPEED_8_0GT: + return 8000; + case PCIE_SPEED_16_0GT: + return 16000; + case PCIE_SPEED_32_0GT: + return 32000; + case PCIE_SPEED_64_0GT: + return 64000; + default: + break; + } + + return -EINVAL; +} +EXPORT_SYMBOL(pcie_link_speed_mbps); + /** * pcie_bandwidth_available - determine minimum link settings of a PCIe * device and its bandwidth limitation @@ -6296,8 +6396,7 @@ u32 pcie_bandwidth_available(struct pci_dev *dev, struct pci_dev **limiting_dev, while (dev) { pcie_capability_read_word(dev, PCI_EXP_LNKSTA, &lnksta); - next_speed = pcie_link_speed[FIELD_GET(PCI_EXP_LNKSTA_CLS, - lnksta)]; + next_speed = to_pcie_link_speed(lnksta); next_width = FIELD_GET(PCI_EXP_LNKSTA_NLW, lnksta); next_bw = next_width * PCIE_SPEED2MBS_ENC(next_speed); @@ -6728,14 +6827,15 @@ static void pci_request_resource_alignment(struct pci_dev *dev, int bar, resource_size_t align, bool resize) { struct resource *r = &dev->resource[bar]; + const char *r_name = pci_resource_name(dev, bar); resource_size_t size; if (!(r->flags & IORESOURCE_MEM)) return; if (r->flags & IORESOURCE_PCI_FIXED) { - pci_info(dev, "BAR%d %pR: ignoring requested alignment %#llx\n", - bar, r, (unsigned long long)align); + pci_info(dev, "%s %pR: ignoring requested alignment %#llx\n", + r_name, r, (unsigned long long)align); return; } @@ -6771,8 +6871,8 @@ static void pci_request_resource_alignment(struct pci_dev *dev, int bar, * devices and we use the second. */ - pci_info(dev, "BAR%d %pR: requesting alignment to %#llx\n", - bar, r, (unsigned long long)align); + pci_info(dev, "%s %pR: requesting alignment to %#llx\n", + r_name, r, (unsigned long long)align); if (resize) { r->start = 0; |