- 19 Jun, 2009 1 commit
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Matthew Wilcox authored
The previous MSI-X fix (8d181018) had three bugs. First, it didn't move the write that disabled the vector. This led to writing garbage to the MSI-X vector (spotted by Michael Ellerman). It didn't fix the PCI resume case, and it had a race window where the device could generate an interrupt before the MSI-X registers were programmed (leading to a DMA to random addresses). Fortunately, the MSI-X capability has a bit to mask all the vectors. By setting this bit instead of clearing the enable bit, we can ensure the device will not generate spurious interrupts. Since the capability is now enabled, the NIU device will not have a problem with the reads and writes to the MSI-X registers being in the original order in the code. Signed-off-by:
Matthew Wilcox <willy@linux.intel.com> Reviewed-by:
Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Signed-off-by:
Jesse Barnes <jbarnes@virtuousgeek.org>
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- 18 Jun, 2009 16 commits
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Kenji Kaneshige authored
By having a pointer to the root port link, we can remove loops in get_root_port_link() to search the root port link. Acked-by:
Shaohua Li <shaohua.li@intel.com> Signed-off-by:
Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by:
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Kenji Kaneshige authored
Minor cleanup for pcie_aspm_sanity_check(). Acked-by:
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Kenji Kaneshige authored
We don't need the 'has_switch' field in the struct pcie_link_state. Acked-by:
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Kenji Kaneshige authored
Cleanup for calc_L0S_latency() and calc_L1_latency(). - Separate exit latency and acceptable latency calculation. - Some minor cleanups. Acked-by:
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Kenji Kaneshige authored
Minor cleanup for pcie_aspm_get_cap_device(). Acked-by:
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Kenji Kaneshige authored
In the current ASPM implementation, callers of pcie_set_clock_pm() check Clock PM capability of the link or current Clock PM state of the link. This check should be done in pcie_set_clock_pm() itself. This patch moves those checks into pcie_set_clock_pm(). It also introduces pcie_set_clkpm_nocheck() that is equivalent to old pcie_set_clock_pm(), for the caller who wants to change Clocl PM state regardless of the Clock PM capability or current Clock PM state. In addition, this patch changes the function name from pcie_set_clock_pm() to pcie_set_clkpm() for consistency. Acked-by:
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Kenji Kaneshige authored
Clean up and simplify __pcie_aspm_check_state_one(). Acked-by:
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Kenji Kaneshige authored
Clean up ASPM initialization by refactoring some functionality, renaming functions, and moving things around. Acked-by:
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Kenji Kaneshige authored
In the current ASPM implementation, there are many functions that take a pointer to struct pci_dev corresponding to the upstream component of the link as a parameter. But, since those functions handle PCI express link state, a pointer to struct pcie_link_state is more suitable than a pointer to struct pci_dev. Changing a parameter to a pointer to struct pcie_link_state makes ASPM code much simpler and easier to read. This patch also contains some minor cleanups. This patch doesn't have any functional change. Acked-by:
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Kenji Kaneshige authored
Cleanup for some fields in pcie_link_state. - Add comments. - make "downstream_has_switch" field 1-bit. Acked-by:
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Kenji Kaneshige authored
The "clk_pm_capable", "clk_pm_enable" and "bios_clk_state" fields in the struct pcie_link_state only take 1-bit value. So those fields don't need to be defined as unsigned int. This patch makes those fields 1-bit, and cleans up some related code. Acked-by:
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Kenji Kaneshige authored
Clean up latency related data structures for ASPM. - Introduce struct acpi_latency for exit latency and acceptable latency management. With this change, struct endpoint_state is no longer needed. - We don't need to hold both upstream latency and downstream latency in the current implementation. Acked-by:
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Kenji Kaneshige authored
The "support_state", "enabled_state" and "bios_aspm_state" fields in the struct pcie_link_state take 2-bit value. So those fields don't need to be defined as unsigned int. This patch makes those fields 2-bit, and cleans up some related code. Acked-by:
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Kenji Kaneshige authored
Fix a typo in struct pcie_link_state. The "sibiling" field in the struct pcie_link_state should be "sibling". Acked-by:
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Alex Chiang authored
There is no way to interact with a physical PCI slot without sysfs, so encode the dependency and prevent this build error: drivers/pci/slot.c: In function 'pci_hp_create_module_link': drivers/pci/slot.c:327: error: 'module_kset' undeclared This patch _should_ make pci-sysfs.o depend on CONFIG_SYSFS too, but we cannot (yet) because the PCI core merrily assumes the existence of sysfs: drivers/built-in.o: In function `pci_bus_add_device': drivers/pci/bus.c:89: undefined reference to `pci_create_sysfs_dev_files' drivers/built-in.o: In function `pci_stop_dev': drivers/pci/remove.c:24: undefined reference to `pci_remove_sysfs_dev_files' So do the minimal bit for now and figure out how to untangle it later. Reported-by:
Randy Dunlap <randy.dunlap@oracle.com> Acked-by:
Stephen Rothwell <sfr@canb.auug.org.au> Fix-suggested-by:
Matthew Wilcox <matthew@wil.cx> Signed-off-by:
Alex Chiang <achiang@hp.com> Signed-off-by:
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Matthew Wilcox authored
We have the 'pos' of the MSI capability at all locations which call msi_set_enable(), so pass it to msi_set_enable() instead of making it find the capability every time. Reviewed-by:
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- 16 Jun, 2009 23 commits
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Frans Pop authored
Other functions use type bool, so use that for pci_enable_wake as well. Signed-off-by:
Frans Pop <elendil@planet.nl> Signed-off-by:
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Gary Hade authored
Issue a warning if _CRS returns too many resource descriptors to be accommodated by the fixed size resource array instances. If there is no transparent bridge on the root bus "too many" is the PCI_BUS_NUM_RESOURCES size of the resource array. Otherwise, the last 3 slots of the resource array must be excluded making the maximum (PCI_BUS_NUM_RESOURCES - 3). The current code: - is silent when _CRS returns too many resource descriptors and - incorrectly allows use of the last 3 slots of the resource array for a root bus with a transparent bridge Signed-off-by:
Gary Hade <garyhade@us.ibm.com> Signed-off-by:
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Kenji Kaneshige authored
Remove invalid comment of msi_mask_irq(). Reviewed-by:
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Rafael J. Wysocki authored
If a PCI device is not power-manageable either by the platform, or with the help of the native PCI PM interface, pci_target_state() will return either PCI_D3hot, or PCI_POWER_ERROR for it, depending on whether or not the device is configured to wake up the system. Alas, none of these return values is correct, because each of them causes pci_prepare_to_sleep() to return error code, although it should complete successfully in such a case. Fix this problem by making pci_target_state() always return PCI_D0 for devices that cannot be power managed. Cc: stable@kernel.org Signed-off-by:
Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by:
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Yu Zhao authored
PCI-to-PCI Bridge 1.2 specifies that the Secondary Bus Reset bit can force the assertion of RST# on the secondary interface, which can be used to reset all devices including subordinates under this bus. This can be used to reset a function if this function is the only device under this bus. Reviewed-by:
Yu Zhao <yu.zhao@intel.com> Signed-off-by:
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Yu Zhao authored
PCI PM 1.2 specifies that the device will perform an internal reset upon transitioning from D3hot to D0 when the NO_SOFT_RESET bit is clear. This method can be used to reset a function if neither PCIe FLR nor PCI AF FLR are supported. Reviewed-by:
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Yu Zhao authored
This patch enhances the FLR functions: 1) remove disable_irq() so the shared IRQ won't be disabled. 2) replace the 1s wait with 100, 200 and 400ms wait intervals for the Pending Transaction. 3) replace mdelay() with msleep(). 4) add might_sleep(). 5) lock the device to prevent PM suspend from accessing the CSRs during the reset. 6) coding style fixes. Reviewed-by: -
Huang Ying authored
Debugging PCIE AER code can be very difficult because it is hard to trigger various real hardware errors. This patch provide a software based error injection tool, which can fake various PCIE errors with a user space helper tool named "aer-inject". Which can be gotten from: http://www.kernel.org/pub/linux/kernel/people/yhuang/ The patch fakes AER error by faking some PCIE AER related registers and an AER interrupt for specified the PCIE device. Signed-off-by:
Huang Ying <ying.huang@intel.com> Signed-off-by:
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Zhang, Yanmin authored
When a root port receives the same errors more than once before the kernel process them, the Multiple Error Messages Received flags are set by hardware. Because the root port could only save one kind of correctable error source id and another uncorrectable error source id at the same time, the second message sender id is lost if the 2 messages are sent from 2 different devices. This patch makes the kernel search all devices under the root port when multiple messages are received. Reviewed-by:
Andrew Patterson <andrew.patterson@hp.com> Signed-off-by:
Zhang Yanmin <yanmin_zhang@linux.intel.com> Signed-off-by:
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Zhang, Yanmin authored
When the bus id part of error source id is equal to 0 or nosourceid=1, make the kernel probe the AER status registers of all devices under the root port to find the initial error reporter. Reviewed-by:
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Zhang, Yanmin authored
Based on PCI Express AER specs, a root port might receive multiple TLP errors while it could only save a correctable error source id and an uncorrectable error source id at the same time. In addition, some root port hardware might be unable to provide a correct source id, i.e., the source id, or the bus id part of the source id provided by root port might be equal to 0. The patchset implements the support in kernel by searching the device tree under the root port. Patch 1 changes parameter cb of function pci_walk_bus to return a value. When cb return non-zero, pci_walk_bus stops more searching on the device tree. Reviewed-by:
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Kenji Kaneshige authored
The "owner" field in struct hotplug_slot_ops is initialized by PCI hotplug core. So each hotplug controller driver doesn't need to initialize it. Signed-off-by:
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Kenji Kaneshige authored
Create symbolic link to hotplug driver module in the PCI slot directory (/sys/bus/pci/slots/<SLOT#>). In the past, we need to load hotplug drivers one by one to identify the hotplug driver that handles the slot, and it was very inconvenient especially for trouble shooting. With this change, we can easily identify the hotplug driver. Signed-off-by:
Taku Izumi <izumi.taku@jp.fujitsu.com> Signed-off-by:
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Kenji Kaneshige authored
Current has_foo() functions in pci_hotplug_core.c returns 0 if the "foo" property is true. It would cause misunderstanding. In addition, the error code of those functions is never checked, so this patch changes those functions' error code to 'bool' and return true if the property "foo" is true. Signed-off-by:
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Kenji Kaneshige authored
The EMI support in pciehp is obviously broken. It is implemented using struct hotplug_slot_attribute, but sysfs_ops for pci_slot_ktype is NOT for struct hotplug_slot_attribute, but for struct pci_slot_attribute. This bug had been there for a long time, maybe it was introduced when PCI slot framework was introduced. The reason why this bug didn't cause any problem is maybe the EMI support is not tested at all because of lack of test environment. As described above, the EMI support in pciehp seems not to be tested at all. So this patch removes EMI support from pciehp, instead of fixing the bug. Signed-off-by:
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Andreas Herrmann authored
Describe check_enable_amd_mmconf. Signed-off-by:
Andreas Herrmann <andreas.herrmann3@amd.com> Signed-off-by:
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Huang Ying authored
This patch adds a minimal HOWTO for PCIE AER software error injection in Documentation/PCI/pcieaer-howto.txt. Signed-off-by:
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Huang Ying authored
This is used by PCIE AER error injection to fake an PCI AER interrupt. Signed-off-by:
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Huang Ying authored
pci_bus_set_ops changes pci_ops associated with a pci_bus. This can be used by debug tools such as PCIE AER error injection to fake some PCI configuration registers. Acked-by:
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Kenji Kaneshige authored
Use pci_is_root_bus() in pci_common_swizzle() for checking if the pci bus is root, for code consistency. Reviewed-by:
Grant Grundler <grundler@parisc-linux.org> Signed-off-by:
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Kenji Kaneshige authored
Use pci_is_root_bus() in pci_get_interrupt_pin() for checking if the pci bus is root, for code consistency. Reviewed-by:
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Kenji Kaneshige authored
Use pci_is_root_bus() in pci_read_bridge_bases() to check if the pci bus is root, for code consistency. Reviewed-by:
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Kenji Kaneshige authored
Use pci_is_root_bus() in pci_find_upstream_pcie_bridge() to check if the pci bus is root, for code consistency. Reviewed-by:
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