From 25daeb550b69e89aff59bc6a84218a12b5203531 Mon Sep 17 00:00:00 2001 From: Dean Nelson Date: Tue, 9 Mar 2010 22:26:40 -0500 Subject: [PATCH 01/18] PCI: fix return value from pcix_get_max_mmrbc() For the PCI_X_STATUS register, pcix_get_max_mmrbc() is returning an incorrect value, which is based on: (stat & PCI_X_STATUS_MAX_READ) >> 12 Valid return values are 512, 1024, 2048, 4096, which correspond to a 'stat' (masked and right shifted by 21) of 0, 1, 2, 3, respectively. A right shift by 11 would generate the correct return value when 'stat' (masked and right shifted by 21) has a value of 1 or 2. But for a value of 0 or 3 it's not possible to generate the correct return value by only right shifting. Fix is based on pcix_get_mmrbc()'s similar dealings with the PCI_X_CMD register. Cc: stable@kernel.org Signed-off-by: Dean Nelson Signed-off-by: Jesse Barnes --- drivers/pci/pci.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index cb1dd5f4988c..ed9eb68fd940 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -2587,7 +2587,7 @@ int pcix_get_max_mmrbc(struct pci_dev *dev) if (err) return -EINVAL; - return (stat & PCI_X_STATUS_MAX_READ) >> 12; + return 512 << ((stat & PCI_X_STATUS_MAX_READ) >> 21); } EXPORT_SYMBOL(pcix_get_max_mmrbc); From ded1d8f29b4d315a2093cafc3ee17ac870a87972 Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Thu, 11 Mar 2010 14:08:33 -0800 Subject: [PATCH 02/18] PCI: kill off pci_register_set_vga_state() symbol export. When pci_register_set_vga_state() was made __init, the EXPORT_SYMBOL() was retained, which now leaves us with a section mismatch. Signed-off-by: Paul Mundt Cc: Mike Travis Signed-off-by: Andrew Morton Signed-off-by: Jesse Barnes --- drivers/pci/pci.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index ed9eb68fd940..9af986085d09 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -3023,7 +3023,6 @@ 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); From bdc2bda7c4dd253026cc1fce45fc939304749029 Mon Sep 17 00:00:00 2001 From: Dean Nelson Date: Tue, 9 Mar 2010 22:26:48 -0500 Subject: [PATCH 03/18] PCI: fix access of PCI_X_CMD by pcix get and set mmrbc functions An e1000 driver on a system with a PCI-X bus was always being returned a value of 135 from both pcix_get_mmrbc() and pcix_set_mmrbc(). This value reflects an error return of PCIBIOS_BAD_REGISTER_NUMBER from pci_bus_read_config_dword(,, cap + PCI_X_CMD,). This is because for a dword, the following portion of the PCI_OP_READ() macro: if (PCI_##size##_BAD) return PCIBIOS_BAD_REGISTER_NUMBER; expands to: if (pos & 3) return PCIBIOS_BAD_REGISTER_NUMBER; And is always true for 'cap + PCI_X_CMD', which is 0xe4 + 2 = 0xe6. ('cap' is the result of calling pci_find_capability(, PCI_CAP_ID_PCIX).) The same problem exists for pci_bus_write_config_dword(,, cap + PCI_X_CMD,). In both cases, instead of calling _dword(), _word() should be called. Cc: stable@kernel.org Signed-off-by: Dean Nelson Signed-off-by: Jesse Barnes --- drivers/pci/pci.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 9af986085d09..5c80b59c5931 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -2601,13 +2601,13 @@ EXPORT_SYMBOL(pcix_get_max_mmrbc); int pcix_get_mmrbc(struct pci_dev *dev) { int ret, cap; - u32 cmd; + u16 cmd; cap = pci_find_capability(dev, PCI_CAP_ID_PCIX); if (!cap) return -EINVAL; - ret = pci_read_config_dword(dev, cap + PCI_X_CMD, &cmd); + ret = pci_read_config_word(dev, cap + PCI_X_CMD, &cmd); if (!ret) ret = 512 << ((cmd & PCI_X_CMD_MAX_READ) >> 2); @@ -2627,7 +2627,8 @@ EXPORT_SYMBOL(pcix_get_mmrbc); int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc) { int cap, err = -EINVAL; - u32 stat, cmd, v, o; + u32 stat, v, o; + u16 cmd; if (mmrbc < 512 || mmrbc > 4096 || !is_power_of_2(mmrbc)) goto out; @@ -2645,7 +2646,7 @@ int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc) if (v > (stat & PCI_X_STATUS_MAX_READ) >> 21) return -E2BIG; - err = pci_read_config_dword(dev, cap + PCI_X_CMD, &cmd); + err = pci_read_config_word(dev, cap + PCI_X_CMD, &cmd); if (err) goto out; @@ -2657,7 +2658,7 @@ int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc) cmd &= ~PCI_X_CMD_MAX_READ; cmd |= v << 2; - err = pci_write_config_dword(dev, cap + PCI_X_CMD, cmd); + err = pci_write_config_word(dev, cap + PCI_X_CMD, cmd); } out: return err; From 7c9e2b1c4784c6e574f69dbd904b2822f2e04d6e Mon Sep 17 00:00:00 2001 From: Dean Nelson Date: Tue, 9 Mar 2010 22:26:55 -0500 Subject: [PATCH 04/18] PCI: cleanup error return for pcix get and set mmrbc functions pcix_get_mmrbc() returns the maximum memory read byte count (mmrbc), if successful, or an appropriate error value, if not. Distinguishing errors from correct values and understanding the meaning of an error can be somewhat confusing in that: correct values: 512, 1024, 2048, 4096 errors: -EINVAL -22 PCIBIOS_FUNC_NOT_SUPPORTED 0x81 PCIBIOS_BAD_VENDOR_ID 0x83 PCIBIOS_DEVICE_NOT_FOUND 0x86 PCIBIOS_BAD_REGISTER_NUMBER 0x87 PCIBIOS_SET_FAILED 0x88 PCIBIOS_BUFFER_TOO_SMALL 0x89 The PCIBIOS_ errors are returned from the PCI functions generated by the PCI_OP_READ() and PCI_OP_WRITE() macros. In a similar manner, pcix_set_mmrbc() also returns the PCIBIOS_ error values returned from pci_read_config_[word|dword]() and pci_write_config_word(). Following pcix_get_max_mmrbc()'s example, the following patch simply returns -EINVAL for all PCIBIOS_ errors encountered by pcix_get_mmrbc(), and -EINVAL or -EIO for those encountered by pcix_set_mmrbc(). This simplification was chosen in light of the fact that none of the current callers of these functions are interested in the specific type of error encountered. In the future, should this change, one could simply create a function that maps each PCIBIOS_ error to a corresponding unique errno value, which could be called by pcix_get_max_mmrbc(), pcix_get_mmrbc(), and pcix_set_mmrbc(). Additionally, this patch eliminates some unnecessary variables. Cc: stable@kernel.org Signed-off-by: Dean Nelson Signed-off-by: Jesse Barnes --- drivers/pci/pci.c | 36 ++++++++++++++++-------------------- 1 file changed, 16 insertions(+), 20 deletions(-) diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 5c80b59c5931..1531f3a49879 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -2576,15 +2576,14 @@ EXPORT_SYMBOL_GPL(pci_reset_function); */ int pcix_get_max_mmrbc(struct pci_dev *dev) { - int err, cap; + int cap; u32 stat; cap = pci_find_capability(dev, PCI_CAP_ID_PCIX); if (!cap) return -EINVAL; - err = pci_read_config_dword(dev, cap + PCI_X_STATUS, &stat); - if (err) + if (pci_read_config_dword(dev, cap + PCI_X_STATUS, &stat)) return -EINVAL; return 512 << ((stat & PCI_X_STATUS_MAX_READ) >> 21); @@ -2600,18 +2599,17 @@ EXPORT_SYMBOL(pcix_get_max_mmrbc); */ int pcix_get_mmrbc(struct pci_dev *dev) { - int ret, cap; + int cap; u16 cmd; cap = pci_find_capability(dev, PCI_CAP_ID_PCIX); if (!cap) return -EINVAL; - ret = pci_read_config_word(dev, cap + PCI_X_CMD, &cmd); - if (!ret) - ret = 512 << ((cmd & PCI_X_CMD_MAX_READ) >> 2); + if (pci_read_config_word(dev, cap + PCI_X_CMD, &cmd)) + return -EINVAL; - return ret; + return 512 << ((cmd & PCI_X_CMD_MAX_READ) >> 2); } EXPORT_SYMBOL(pcix_get_mmrbc); @@ -2626,29 +2624,27 @@ EXPORT_SYMBOL(pcix_get_mmrbc); */ int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc) { - int cap, err = -EINVAL; + int cap; u32 stat, v, o; u16 cmd; if (mmrbc < 512 || mmrbc > 4096 || !is_power_of_2(mmrbc)) - goto out; + return -EINVAL; v = ffs(mmrbc) - 10; cap = pci_find_capability(dev, PCI_CAP_ID_PCIX); if (!cap) - goto out; + return -EINVAL; - err = pci_read_config_dword(dev, cap + PCI_X_STATUS, &stat); - if (err) - goto out; + if (pci_read_config_dword(dev, cap + PCI_X_STATUS, &stat)) + return -EINVAL; if (v > (stat & PCI_X_STATUS_MAX_READ) >> 21) return -E2BIG; - err = pci_read_config_word(dev, cap + PCI_X_CMD, &cmd); - if (err) - goto out; + if (pci_read_config_word(dev, cap + PCI_X_CMD, &cmd)) + return -EINVAL; o = (cmd & PCI_X_CMD_MAX_READ) >> 2; if (o != v) { @@ -2658,10 +2654,10 @@ int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc) cmd &= ~PCI_X_CMD_MAX_READ; cmd |= v << 2; - err = pci_write_config_word(dev, cap + PCI_X_CMD, cmd); + if (pci_write_config_word(dev, cap + PCI_X_CMD, cmd)) + return -EIO; } -out: - return err; + return 0; } EXPORT_SYMBOL(pcix_set_mmrbc); From 66f1207bce10fd80ee8ce99b67d617644612f05e Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Thu, 11 Mar 2010 17:01:09 -0700 Subject: [PATCH 05/18] resources: add interfaces that return conflict information request_resource() and insert_resource() only return success or failure, which no information about what existing resource conflicted with the proposed new reservation. This patch adds request_resource_conflict() and insert_resource_conflict(), which return the conflicting resource. Callers may use this for better error messages or to adjust the new resource and retry the request. Signed-off-by: Bjorn Helgaas Signed-off-by: Jesse Barnes --- include/linux/ioport.h | 2 ++ kernel/resource.c | 44 +++++++++++++++++++++++++++++++++++------- 2 files changed, 39 insertions(+), 7 deletions(-) diff --git a/include/linux/ioport.h b/include/linux/ioport.h index 71ab79da7e7f..26fad187d661 100644 --- a/include/linux/ioport.h +++ b/include/linux/ioport.h @@ -112,12 +112,14 @@ struct resource_list { extern struct resource ioport_resource; extern struct resource iomem_resource; +extern struct resource *request_resource_conflict(struct resource *root, struct resource *new); extern int request_resource(struct resource *root, struct resource *new); extern int release_resource(struct resource *new); void release_child_resources(struct resource *new); extern void reserve_region_with_split(struct resource *root, resource_size_t start, resource_size_t end, const char *name); +extern struct resource *insert_resource_conflict(struct resource *parent, struct resource *new); extern int insert_resource(struct resource *parent, struct resource *new); extern void insert_resource_expand_to_fit(struct resource *root, struct resource *new); extern int allocate_resource(struct resource *root, struct resource *new, diff --git a/kernel/resource.c b/kernel/resource.c index 2d5be5d9bf5f..9c358e263534 100644 --- a/kernel/resource.c +++ b/kernel/resource.c @@ -218,6 +218,23 @@ void release_child_resources(struct resource *r) write_unlock(&resource_lock); } +/** + * request_resource_conflict - request and reserve an I/O or memory resource + * @root: root resource descriptor + * @new: resource descriptor desired by caller + * + * Returns 0 for success, conflict resource on error. + */ +struct resource *request_resource_conflict(struct resource *root, struct resource *new) +{ + struct resource *conflict; + + write_lock(&resource_lock); + conflict = __request_resource(root, new); + write_unlock(&resource_lock); + return conflict; +} + /** * request_resource - request and reserve an I/O or memory resource * @root: root resource descriptor @@ -229,9 +246,7 @@ int request_resource(struct resource *root, struct resource *new) { struct resource *conflict; - write_lock(&resource_lock); - conflict = __request_resource(root, new); - write_unlock(&resource_lock); + conflict = request_resource_conflict(root, new); return conflict ? -EBUSY : 0; } @@ -474,25 +489,40 @@ static struct resource * __insert_resource(struct resource *parent, struct resou } /** - * insert_resource - Inserts a resource in the resource tree + * insert_resource_conflict - Inserts resource in the resource tree * @parent: parent of the new resource * @new: new resource to insert * - * Returns 0 on success, -EBUSY if the resource can't be inserted. + * Returns 0 on success, conflict resource if the resource can't be inserted. * - * This function is equivalent to request_resource when no conflict + * This function is equivalent to request_resource_conflict when no conflict * happens. If a conflict happens, and the conflicting resources * entirely fit within the range of the new resource, then the new * resource is inserted and the conflicting resources become children of * the new resource. */ -int insert_resource(struct resource *parent, struct resource *new) +struct resource *insert_resource_conflict(struct resource *parent, struct resource *new) { struct resource *conflict; write_lock(&resource_lock); conflict = __insert_resource(parent, new); write_unlock(&resource_lock); + return conflict; +} + +/** + * insert_resource - Inserts a resource in the resource tree + * @parent: parent of the new resource + * @new: new resource to insert + * + * Returns 0 on success, -EBUSY if the resource can't be inserted. + */ +int insert_resource(struct resource *parent, struct resource *new) +{ + struct resource *conflict; + + conflict = insert_resource_conflict(parent, new); return conflict ? -EBUSY : 0; } From 966f3a7570447c5025d67a618d408e68a3ae3167 Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Thu, 11 Mar 2010 17:01:19 -0700 Subject: [PATCH 06/18] PCI: for address space collisions, show conflicting resource With request_resource_conflict(), we can learn what the actual conflict is, so print that info for debugging purposes. Signed-off-by: Bjorn Helgaas Signed-off-by: Jesse Barnes --- drivers/pci/setup-res.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c index 7d678bb15ffb..17bed18d24ad 100644 --- a/drivers/pci/setup-res.c +++ b/drivers/pci/setup-res.c @@ -93,8 +93,7 @@ void pci_update_resource(struct pci_dev *dev, int resno) int pci_claim_resource(struct pci_dev *dev, int resource) { struct resource *res = &dev->resource[resource]; - struct resource *root; - int err; + struct resource *root, *conflict; root = pci_find_parent_resource(dev, res); if (!root) { @@ -103,12 +102,15 @@ int pci_claim_resource(struct pci_dev *dev, int resource) return -EINVAL; } - err = request_resource(root, res); - if (err) + conflict = request_resource_conflict(root, res); + if (conflict) { dev_err(&dev->dev, - "address space collision: %pR already in use\n", res); + "address space collision: %pR conflicts with %s %pR\n", + res, conflict->name, conflict); + return -EBUSY; + } - return err; + return 0; } EXPORT_SYMBOL(pci_claim_resource); From 99ddd552fef7e6e3b7dc76ba8fee9ea5869d1e14 Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Tue, 16 Mar 2010 15:52:58 -0600 Subject: [PATCH 07/18] PCI: break out primary/secondary/subordinate for readability No functional change; just add names for the primary/secondary/subordinate bus numbers read from config space rather than repeatedly masking/shifting. Signed-off-by: Bjorn Helgaas Signed-off-by: Jesse Barnes --- drivers/pci/probe.c | 24 ++++++++++++++---------- 1 file changed, 14 insertions(+), 10 deletions(-) diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 2a943090a3b7..7feacf521e14 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -673,16 +673,20 @@ int __devinit pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max, int is_cardbus = (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS); u32 buses, i, j = 0; u16 bctl; + u8 primary, secondary, subordinate; int broken = 0; pci_read_config_dword(dev, PCI_PRIMARY_BUS, &buses); + primary = buses & 0xFF; + secondary = (buses >> 8) & 0xFF; + subordinate = (buses >> 16) & 0xFF; - dev_dbg(&dev->dev, "scanning behind bridge, config %06x, pass %d\n", - buses & 0xffffff, pass); + dev_dbg(&dev->dev, "scanning [bus %02x-%02x] behind bridge, pass %d\n", + secondary, subordinate, pass); /* Check if setup is sensible at all */ if (!pass && - ((buses & 0xff) != bus->number || ((buses >> 8) & 0xff) <= bus->number)) { + (primary != bus->number || secondary <= bus->number)) { dev_dbg(&dev->dev, "bus configuration invalid, reconfiguring\n"); broken = 1; } @@ -693,15 +697,15 @@ int __devinit pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max, pci_write_config_word(dev, PCI_BRIDGE_CONTROL, bctl & ~PCI_BRIDGE_CTL_MASTER_ABORT); - if ((buses & 0xffff00) && !pcibios_assign_all_busses() && !is_cardbus && !broken) { - unsigned int cmax, busnr; + if ((secondary || subordinate) && !pcibios_assign_all_busses() && + !is_cardbus && !broken) { + unsigned int cmax; /* * Bus already configured by firmware, process it in the first * pass and just note the configuration. */ if (pass) goto out; - busnr = (buses >> 8) & 0xFF; /* * If we already got to this bus through a different bridge, @@ -710,13 +714,13 @@ int __devinit pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max, * However, we continue to descend down the hierarchy and * scan remaining child buses. */ - child = pci_find_bus(pci_domain_nr(bus), busnr); + child = pci_find_bus(pci_domain_nr(bus), secondary); if (!child) { - child = pci_add_new_bus(bus, dev, busnr); + child = pci_add_new_bus(bus, dev, secondary); if (!child) goto out; - child->primary = buses & 0xFF; - child->subordinate = (buses >> 16) & 0xFF; + child->primary = primary; + child->subordinate = subordinate; child->bridge_ctl = bctl; } From 7b8ff6da028232aadae6bcc7c7406c8966d0b3c4 Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Tue, 16 Mar 2010 15:53:03 -0600 Subject: [PATCH 08/18] PCI: make disabled window printk style match the enabled ones No functional change; this just tweaks the changes from 349e1823a405 so the new printks for disabled PCI-to-PCI bridge windows match the ones for the enabled windows. Signed-off-by: Bjorn Helgaas CC: Yinghai Lu Signed-off-by: Jesse Barnes --- drivers/pci/probe.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 7feacf521e14..c82548afcd5c 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -312,7 +312,7 @@ static void __devinit pci_read_bridge_io(struct pci_bus *child) dev_printk(KERN_DEBUG, &dev->dev, " bridge window %pR\n", res); } else { dev_printk(KERN_DEBUG, &dev->dev, - " bridge window [io %04lx - %04lx] reg reading\n", + " bridge window [io %#06lx-%#06lx] (disabled)\n", base, limit); } } @@ -336,7 +336,7 @@ static void __devinit pci_read_bridge_mmio(struct pci_bus *child) dev_printk(KERN_DEBUG, &dev->dev, " bridge window %pR\n", res); } else { dev_printk(KERN_DEBUG, &dev->dev, - " bridge window [mem 0x%08lx - 0x%08lx] reg reading\n", + " bridge window [mem %#010lx-%#010lx] (disabled)\n", base, limit + 0xfffff); } } @@ -387,7 +387,7 @@ static void __devinit pci_read_bridge_mmio_pref(struct pci_bus *child) dev_printk(KERN_DEBUG, &dev->dev, " bridge window %pR\n", res); } else { dev_printk(KERN_DEBUG, &dev->dev, - " bridge window [mem 0x%08lx - %08lx pref] reg reading\n", + " bridge window [mem %#010lx-%#010lx pref] (disabled)\n", base, limit + 0xfffff); } } From e1944c6b0fba80a7837c1cbc47dfbf46e1274a4b Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Tue, 16 Mar 2010 15:53:08 -0600 Subject: [PATCH 09/18] PCI: print resources consistently with %pR No functional change; just print resources in the conventional style. Signed-off-by: Bjorn Helgaas Signed-off-by: Jesse Barnes --- drivers/pci/hotplug/pciehp_hpc.c | 5 ++--- drivers/pci/ioapic.c | 9 ++++----- drivers/pcmcia/rsrc_nonstatic.c | 12 ++++-------- 3 files changed, 10 insertions(+), 16 deletions(-) diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c index 40b48f569b1e..9665d6b17a2a 100644 --- a/drivers/pci/hotplug/pciehp_hpc.c +++ b/drivers/pci/hotplug/pciehp_hpc.c @@ -832,9 +832,8 @@ static inline void dbg_ctrl(struct controller *ctrl) for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { if (!pci_resource_len(pdev, i)) continue; - ctrl_info(ctrl, " PCI resource [%d] : 0x%llx@0x%llx\n", - i, (unsigned long long)pci_resource_len(pdev, i), - (unsigned long long)pci_resource_start(pdev, i)); + ctrl_info(ctrl, " PCI resource [%d] : %pR\n", + i, &pdev->resource[i]); } ctrl_info(ctrl, "Slot Capabilities : 0x%08x\n", ctrl->slot_cap); ctrl_info(ctrl, " Physical Slot Number : %d\n", PSN(ctrl)); diff --git a/drivers/pci/ioapic.c b/drivers/pci/ioapic.c index 3e0d7b5dd1b9..fb9fdf4a42bf 100644 --- a/drivers/pci/ioapic.c +++ b/drivers/pci/ioapic.c @@ -31,9 +31,9 @@ static int ioapic_probe(struct pci_dev *dev, const struct pci_device_id *ent) acpi_status status; unsigned long long gsb; struct ioapic *ioapic; - u64 addr; int ret; char *type; + struct resource *res; handle = DEVICE_ACPI_HANDLE(&dev->dev); if (!handle) @@ -69,13 +69,12 @@ static int ioapic_probe(struct pci_dev *dev, const struct pci_device_id *ent) if (pci_request_region(dev, 0, type)) goto exit_disable; - addr = pci_resource_start(dev, 0); - if (acpi_register_ioapic(ioapic->handle, addr, ioapic->gsi_base)) + res = &dev->resource[0]; + if (acpi_register_ioapic(ioapic->handle, res->start, ioapic->gsi_base)) goto exit_release; pci_set_drvdata(dev, ioapic); - dev_info(&dev->dev, "%s at %#llx, GSI %u\n", type, addr, - ioapic->gsi_base); + dev_info(&dev->dev, "%s at %pR, GSI %u\n", type, res, ioapic->gsi_base); return 0; exit_release: diff --git a/drivers/pcmcia/rsrc_nonstatic.c b/drivers/pcmcia/rsrc_nonstatic.c index 4663b3fa9f96..b4968ca5bc9d 100644 --- a/drivers/pcmcia/rsrc_nonstatic.c +++ b/drivers/pcmcia/rsrc_nonstatic.c @@ -867,10 +867,8 @@ static int nonstatic_autoadd_resources(struct pcmcia_socket *s) if (res == &ioport_resource) continue; dev_printk(KERN_INFO, &s->cb_dev->dev, - "pcmcia: parent PCI bridge I/O " - "window: 0x%llx - 0x%llx\n", - (unsigned long long)res->start, - (unsigned long long)res->end); + "pcmcia: parent PCI bridge window: %pR\n", + res); if (!adjust_io(s, ADD_MANAGED_RESOURCE, res->start, res->end)) done |= IORESOURCE_IO; @@ -880,10 +878,8 @@ static int nonstatic_autoadd_resources(struct pcmcia_socket *s) if (res == &iomem_resource) continue; dev_printk(KERN_INFO, &s->cb_dev->dev, - "pcmcia: parent PCI bridge Memory " - "window: 0x%llx - 0x%llx\n", - (unsigned long long)res->start, - (unsigned long long)res->end); + "pcmcia: parent PCI bridge window: %pR\n", + res); if (!adjust_memory(s, ADD_MANAGED_RESOURCE, res->start, res->end)) done |= IORESOURCE_MEM; } From c519a5a7dab2d8e9a114f003e2d369bcf8e913f3 Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Fri, 19 Mar 2010 14:56:27 -0600 Subject: [PATCH 10/18] PCI: complain about devices that seem to be broken If we can tell that a device isn't working correctly, we should tell the user to make debugging easier. Otherwise, it can take a lot of work to determine whether the problem is in the driver, PCMCIA, PCI, hardware, etc., as in http://bugzilla.kernel.org/show_bug.cgi?id=12006 Signed-off-by: Bjorn Helgaas Signed-off-by: Jesse Barnes --- drivers/pci/probe.c | 23 ++++++++++++++++------- 1 file changed, 16 insertions(+), 7 deletions(-) diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index c82548afcd5c..882bd8d29fe3 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -174,14 +174,19 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type, pci_read_config_dword(dev, pos, &sz); pci_write_config_dword(dev, pos, l); + if (!sz) + goto fail; /* BAR not implemented */ + /* * All bits set in sz means the device isn't working properly. - * If the BAR isn't implemented, all bits must be 0. If it's a - * memory BAR or a ROM, bit 0 must be clear; if it's an io BAR, bit - * 1 must be clear. + * If it's a memory BAR or a ROM, bit 0 must be clear; if it's + * an io BAR, bit 1 must be clear. */ - if (!sz || sz == 0xffffffff) + if (sz == 0xffffffff) { + dev_err(&dev->dev, "reg %x: invalid size %#x; broken device?\n", + pos, sz); goto fail; + } /* * I don't know how l can have all bits set. Copied from old code. @@ -244,13 +249,17 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type, pos, res); } } else { - sz = pci_size(l, sz, mask); + u32 size = pci_size(l, sz, mask); - if (!sz) + if (!size) { + dev_err(&dev->dev, "reg %x: invalid size " + "(l %#x sz %#x mask %#x); broken device?", + pos, l, sz, mask); goto fail; + } res->start = l; - res->end = l + sz; + res->end = l + size; dev_printk(KERN_DEBUG, &dev->dev, "reg %x: %pR\n", pos, res); } From ca8463926306580c25e62eb901a206530d480cae Mon Sep 17 00:00:00 2001 From: Tim Yamin Date: Fri, 19 Mar 2010 14:22:58 -0700 Subject: [PATCH 11/18] PCI quirk: only apply CX700 PCI bus parking quirk if external VT6212L is present Apply the CX700 quirk only when an external VT6212L is present (which is the case for the errant hardware the quirk was written for), don't touch the settings otherwise -- Hauppage PVR-500 tuners need PCI Bus Parking in order to work and when that's turned on everything seems to behave fine. I guess the underlying problem is a combination of an external VT6212L and the CX700 rather than the CX700's PCI being broken completely for all cases... Reported-by: Jeroen Roos Signed-off-by: Tim Yamin Signed-off-by: Jesse Barnes --- drivers/pci/quirks.c | 20 +++++++++++++++++--- 1 file changed, 17 insertions(+), 3 deletions(-) diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 81d19d5683ac..8284958fc530 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -1977,11 +1977,25 @@ static void __devinit quirk_via_cx700_pci_parking_caching(struct pci_dev *dev) /* * Disable PCI Bus Parking and PCI Master read caching on CX700 * which causes unspecified timing errors with a VT6212L on the PCI - * bus leading to USB2.0 packet loss. The defaults are that these - * features are turned off but some BIOSes turn them on. + * bus leading to USB2.0 packet loss. + * + * This quirk is only enabled if a second (on the external PCI bus) + * VT6212L is found -- the CX700 core itself also contains a USB + * host controller with the same PCI ID as the VT6212L. */ + /* Count VT6212L instances */ + struct pci_dev *p = pci_get_device(PCI_VENDOR_ID_VIA, + PCI_DEVICE_ID_VIA_8235_USB_2, NULL); uint8_t b; + + /* p should contain the first (internal) VT6212L -- see if we have + an external one by searching again */ + p = pci_get_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8235_USB_2, p); + if (!p) + return; + pci_dev_put(p); + if (pci_read_config_byte(dev, 0x76, &b) == 0) { if (b & 0x40) { /* Turn off PCI Bus Parking */ @@ -2008,7 +2022,7 @@ static void __devinit quirk_via_cx700_pci_parking_caching(struct pci_dev *dev) } } } -DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_VIA, 0x324e, quirk_via_cx700_pci_parking_caching); +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, 0x324e, quirk_via_cx700_pci_parking_caching); /* * For Broadcom 5706, 5708, 5709 rev. A nics, any read beyond the From a5ee4eb75413c145334c30e43f1af9875dad6fd7 Mon Sep 17 00:00:00 2001 From: Clemens Ladisch Date: Mon, 22 Mar 2010 09:52:16 +0100 Subject: [PATCH 12/18] PCI quirk: RS780/RS880: work around missing MSI initialization AMD says in section 2.5.4 (GFX MSI Enable) of #43291 (AMD 780G Family Register Programming Requirements): The SBIOS must enable internal graphics MSI capability in GCCFG by setting the following: NBCFG.NB_CNTL.STRAP_MSI_ENABLE='1' Quite a few BIOS writers misinterpret this sentence and think that enabling MSI is an optional feature. However, clearing that bit just prevents delivery of MSI messages but does not remove the MSI PCI capabilities registers, and so leaves these devices unusable for any driver that attempts to use MSI. Setting that bit is not possible after the BIOS has locked down the configuration registers, so we have to manually disable MSI for the affected devices. This fixes the codec communication errors in the HDA driver when accessing the HDMI audio device, and allows us to get rid of the overcautious quirk in radeon_irq_kms.c. Signed-off-by: Clemens Ladisch Tested-by: Alex Deucher Cc: Signed-off-by: Jesse Barnes --- drivers/gpu/drm/radeon/radeon_irq_kms.c | 8 +----- drivers/pci/quirks.c | 33 +++++++++++++++++++++++++ 2 files changed, 34 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/drm/radeon/radeon_irq_kms.c b/drivers/gpu/drm/radeon/radeon_irq_kms.c index 3cfd60fd0083..ea4c645ece11 100644 --- a/drivers/gpu/drm/radeon/radeon_irq_kms.c +++ b/drivers/gpu/drm/radeon/radeon_irq_kms.c @@ -116,13 +116,7 @@ int radeon_irq_kms_init(struct radeon_device *rdev) } /* enable msi */ rdev->msi_enabled = 0; - /* MSIs don't seem to work on my rs780; - * not sure about rs880 or other rs780s. - * Needs more investigation. - */ - if ((rdev->family >= CHIP_RV380) && - (rdev->family != CHIP_RS780) && - (rdev->family != CHIP_RS880)) { + if (rdev->family >= CHIP_RV380) { int ret = pci_enable_msi(rdev->pdev); if (!ret) { rdev->msi_enabled = 1; diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 8284958fc530..bb5b46abc996 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -2493,6 +2493,39 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x4374, DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x4375, quirk_msi_intx_disable_bug); +/* + * MSI does not work with the AMD RS780/RS880 internal graphics and HDMI audio + * devices unless the BIOS has initialized the nb_cntl.strap_msi_enable bit. + */ +static void __init rs780_int_gfx_disable_msi(struct pci_dev *int_gfx_bridge) +{ + u32 nb_cntl; + + if (!int_gfx_bridge->subordinate) + return; + + pci_bus_write_config_dword(int_gfx_bridge->bus, PCI_DEVFN(0, 0), + 0x60, 0); + pci_bus_read_config_dword(int_gfx_bridge->bus, PCI_DEVFN(0, 0), + 0x64, &nb_cntl); + + if (!(nb_cntl & BIT(10))) { + dev_warn(&int_gfx_bridge->dev, + FW_WARN "RS780: MSI for internal graphics disabled\n"); + int_gfx_bridge->subordinate->bus_flags |= PCI_BUS_FLAGS_NO_MSI; + } +} + +#define PCI_DEVICE_ID_AMD_RS780_P2P_INT_GFX 0x9602 + +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, + PCI_DEVICE_ID_AMD_RS780_P2P_INT_GFX, + rs780_int_gfx_disable_msi); +/* wrong vendor ID on M4A785TD motherboard: */ +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ASUSTEK, + PCI_DEVICE_ID_AMD_RS780_P2P_INT_GFX, + rs780_int_gfx_disable_msi); + #endif /* CONFIG_PCI_MSI */ #ifdef CONFIG_PCI_IOV From 134b345081534235dbf228b1005c14590e0570ba Mon Sep 17 00:00:00 2001 From: Matthew Wilcox Date: Wed, 24 Mar 2010 07:11:01 -0600 Subject: [PATCH 13/18] PCI quirk: Disable MSI on VIA K8T890 systems Bugzilla 15287 indicates that there's a problem with Message Signalled Interrupts on VIA K8T890 systems. Add a quirk to disable MSI on these systems. Signed-off-by: Matthew Wilcox Tested-by: Jan Kreuzer Tested-by: lh Signed-off-by: Jesse Barnes --- drivers/pci/quirks.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index bb5b46abc996..f6bbb9c89e3d 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -2122,6 +2122,7 @@ static void __devinit quirk_disable_msi(struct pci_dev *dev) } } DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8131_BRIDGE, quirk_disable_msi); +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, 0xa238, quirk_disable_msi); /* Go through the list of Hypertransport capabilities and * return 1 if a HT MSI capability is found and enabled */ From f967a44343e407811898ddac97abc69b293e9810 Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Mon, 22 Mar 2010 16:34:05 -0600 Subject: [PATCH 14/18] PCI: don't say we claimed a resource if we failed pci_claim_resource() can fail, so pay attention and only claim success when it actually succeeded. If pci_claim_resource() fails, it prints a useful diagnostic. Signed-off-by: Bjorn Helgaas Signed-off-by: Jesse Barnes --- drivers/pci/quirks.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index f6bbb9c89e3d..3ea0b29c0104 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -368,8 +368,9 @@ static void __devinit quirk_io_region(struct pci_dev *dev, unsigned region, bus_region.end = res->end; pcibios_bus_to_resource(dev, res, &bus_region); - pci_claim_resource(dev, nr); - dev_info(&dev->dev, "quirk: %pR claimed by %s\n", res, name); + if (pci_claim_resource(dev, nr) == 0) + dev_info(&dev->dev, "quirk: %pR claimed by %s\n", + res, name); } } From c9c9b564717e5b6b2ae8b770da1c73a348c84cce Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Mon, 22 Mar 2010 16:34:10 -0600 Subject: [PATCH 15/18] x86/PCI: remove redundant warnings pci_claim_resource() already prints more detailed error messages, so these are really redundant. Signed-off-by: Bjorn Helgaas Signed-off-by: Jesse Barnes --- arch/x86/pci/i386.c | 5 ----- 1 file changed, 5 deletions(-) diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c index dece3eb9c906..46fd43f79103 100644 --- a/arch/x86/pci/i386.c +++ b/arch/x86/pci/i386.c @@ -127,9 +127,6 @@ static void __init pcibios_allocate_bus_resources(struct list_head *bus_list) continue; if (!r->start || pci_claim_resource(dev, idx) < 0) { - dev_info(&dev->dev, - "can't reserve window %pR\n", - r); /* * Something is wrong with the region. * Invalidate the resource to prevent @@ -181,8 +178,6 @@ static void __init pcibios_allocate_resources(int pass) "BAR %d: reserving %pr (d=%d, p=%d)\n", idx, r, disabled, pass); if (pci_claim_resource(dev, idx) < 0) { - dev_info(&dev->dev, - "can't reserve %pR\n", r); /* We'll assign a new address later */ r->end -= r->start; r->start = 0; From 99f4692e13ba22b228bdd155473f24ae9bdec1dc Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Mon, 22 Mar 2010 16:34:15 -0600 Subject: [PATCH 16/18] frv/PCI: remove redundant warnings pci_claim_resource() already prints more detailed error messages, so these are really redundant. Signed-off-by: Bjorn Helgaas Signed-off-by: Jesse Barnes --- arch/frv/mb93090-mb00/pci-frv.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/arch/frv/mb93090-mb00/pci-frv.c b/arch/frv/mb93090-mb00/pci-frv.c index 1ed15d7fea20..16bc2cb5649a 100644 --- a/arch/frv/mb93090-mb00/pci-frv.c +++ b/arch/frv/mb93090-mb00/pci-frv.c @@ -94,8 +94,7 @@ static void __init pcibios_allocate_bus_resources(struct list_head *bus_list) r = &dev->resource[idx]; if (!r->start) continue; - if (pci_claim_resource(dev, idx) < 0) - printk(KERN_ERR "PCI: Cannot allocate resource region %d of bridge %s\n", idx, pci_name(dev)); + pci_claim_resource(dev, idx); } } pcibios_allocate_bus_resources(&bus->children); @@ -125,7 +124,6 @@ static void __init pcibios_allocate_resources(int pass) DBG("PCI: Resource %08lx-%08lx (f=%lx, d=%d, p=%d)\n", r->start, r->end, r->flags, disabled, pass); if (pci_claim_resource(dev, idx) < 0) { - printk(KERN_ERR "PCI: Cannot allocate resource region %d of device %s\n", idx, pci_name(dev)); /* We'll assign a new address later */ r->end -= r->start; r->start = 0; From eb9fc8ef7cb1362374e55d9503e3e7458f319991 Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Thu, 25 Mar 2010 09:28:24 -0600 Subject: [PATCH 17/18] x86/PCI: for host bridge address space collisions, show conflicting resource With insert_resource_conflict(), we can learn what the actual conflict is, so print that info for debugging purposes. Signed-off-by: Bjorn Helgaas Signed-off-by: Jesse Barnes --- arch/x86/pci/acpi.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c index 6e22454bfaa6..75ac3f856ea5 100644 --- a/arch/x86/pci/acpi.c +++ b/arch/x86/pci/acpi.c @@ -122,7 +122,7 @@ setup_resource(struct acpi_resource *acpi_res, void *data) struct acpi_resource_address64 addr; acpi_status status; unsigned long flags; - struct resource *root; + struct resource *root, *conflict; u64 start, end; status = resource_to_addr(acpi_res, &addr); @@ -157,9 +157,12 @@ setup_resource(struct acpi_resource *acpi_res, void *data) return AE_OK; } - if (insert_resource(root, res)) { + conflict = insert_resource_conflict(root, res); + if (conflict) { dev_err(&info->bridge->dev, - "can't allocate host bridge window %pR\n", res); + "address space collision: host bridge window %pR " + "conflicts with %s %pR\n", + res, conflict->name, conflict); } else { pci_bus_add_resource(info->bus, res, 0); info->res_num++; From d558b483d5a73f5718705b270cb2090f66ea48c8 Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Thu, 25 Mar 2010 09:28:30 -0600 Subject: [PATCH 18/18] x86/PCI: truncate _CRS windows with _LEN > _MAX - _MIN + 1 Yanko's GA-MA78GM-S2H (BIOS F11) reports the following resource in a PCI host bridge _CRS: [07] 32-Bit DWORD Address Space Resource Min Relocatability : MinFixed Max Relocatability : MaxFixed Address Minimum : CFF00000 (_MIN) Address Maximum : FEBFFFFF (_MAX) Address Length : 3EE10000 (_LEN) This is invalid per spec (ACPI 4.0, 6.4.3.5) because it's a fixed size, fixed location descriptor, but _LEN != _MAX - _MIN + 1. Based on https://bugzilla.kernel.org/show_bug.cgi?id=15480#c15, I think Windows handles this by truncating the window so it fits between _MIN and _MAX. I also verified this by modifying the SeaBIOS DSDT and booting Windows 2008 R2 with qemu. This patch makes Linux truncate the window, too, which fixes: http://bugzilla.kernel.org/show_bug.cgi?id=15480 Signed-off-by: Bjorn Helgaas Tested-by: Yanko Kaneti Signed-off-by: Jesse Barnes --- arch/x86/pci/acpi.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c index 75ac3f856ea5..e31160216efb 100644 --- a/arch/x86/pci/acpi.c +++ b/arch/x86/pci/acpi.c @@ -123,7 +123,7 @@ setup_resource(struct acpi_resource *acpi_res, void *data) acpi_status status; unsigned long flags; struct resource *root, *conflict; - u64 start, end; + u64 start, end, max_len; status = resource_to_addr(acpi_res, &addr); if (!ACPI_SUCCESS(status)) @@ -140,6 +140,17 @@ setup_resource(struct acpi_resource *acpi_res, void *data) } else return AE_OK; + max_len = addr.maximum - addr.minimum + 1; + if (addr.address_length > max_len) { + dev_printk(KERN_DEBUG, &info->bridge->dev, + "host bridge window length %#llx doesn't fit in " + "%#llx-%#llx, trimming\n", + (unsigned long long) addr.address_length, + (unsigned long long) addr.minimum, + (unsigned long long) addr.maximum); + addr.address_length = max_len; + } + start = addr.minimum + addr.translation_offset; end = start + addr.address_length - 1;