diff options
Diffstat (limited to 'Documentation/PCI')
| -rw-r--r-- | Documentation/PCI/00-INDEX | 26 | ||||
| -rw-r--r-- | Documentation/PCI/endpoint/pci-test-howto.txt | 19 | ||||
| -rw-r--r-- | Documentation/PCI/pci-error-recovery.txt | 35 |
3 files changed, 21 insertions, 59 deletions
diff --git a/Documentation/PCI/00-INDEX b/Documentation/PCI/00-INDEX deleted file mode 100644 index 206b1d5c1e71..000000000000 --- a/Documentation/PCI/00-INDEX +++ /dev/null @@ -1,26 +0,0 @@ -00-INDEX - - this file -acpi-info.txt - - info on how PCI host bridges are represented in ACPI -MSI-HOWTO.txt - - the Message Signaled Interrupts (MSI) Driver Guide HOWTO and FAQ. -PCIEBUS-HOWTO.txt - - a guide describing the PCI Express Port Bus driver -pci-error-recovery.txt - - info on PCI error recovery -pci-iov-howto.txt - - the PCI Express I/O Virtualization HOWTO -pci.txt - - info on the PCI subsystem for device driver authors -pcieaer-howto.txt - - the PCI Express Advanced Error Reporting Driver Guide HOWTO -endpoint/pci-endpoint.txt - - guide to add endpoint controller driver and endpoint function driver. -endpoint/pci-endpoint-cfs.txt - - guide to use configfs to configure the PCI endpoint function. -endpoint/pci-test-function.txt - - specification of *PCI test* function device. -endpoint/pci-test-howto.txt - - userguide for PCI endpoint test function. -endpoint/function/binding/ - - binding documentation for PCI endpoint function diff --git a/Documentation/PCI/endpoint/pci-test-howto.txt b/Documentation/PCI/endpoint/pci-test-howto.txt index e40cf0fb58d7..040479f437a5 100644 --- a/Documentation/PCI/endpoint/pci-test-howto.txt +++ b/Documentation/PCI/endpoint/pci-test-howto.txt @@ -99,17 +99,20 @@ Note that the devices listed here correspond to the value populated in 1.4 above 2.2 Using Endpoint Test function Device pcitest.sh added in tools/pci/ can be used to run all the default PCI endpoint -tests. Before pcitest.sh can be used pcitest.c should be compiled using the -following commands. +tests. To compile this tool the following commands should be used: - cd <kernel-dir> - make headers_install ARCH=arm - arm-linux-gnueabihf-gcc -Iusr/include tools/pci/pcitest.c -o pcitest - cp pcitest <rootfs>/usr/sbin/ - cp tools/pci/pcitest.sh <rootfs> + # cd <kernel-dir> + # make -C tools/pci + +or if you desire to compile and install in your system: + + # cd <kernel-dir> + # make -C tools/pci install + +The tool and script will be located in <rootfs>/usr/bin/ 2.2.1 pcitest.sh Output - # ./pcitest.sh + # pcitest.sh BAR tests BAR0: OKAY diff --git a/Documentation/PCI/pci-error-recovery.txt b/Documentation/PCI/pci-error-recovery.txt index 688b69121e82..0b6bb3ef449e 100644 --- a/Documentation/PCI/pci-error-recovery.txt +++ b/Documentation/PCI/pci-error-recovery.txt @@ -110,7 +110,7 @@ The actual steps taken by a platform to recover from a PCI error event will be platform-dependent, but will follow the general sequence described below. -STEP 0: Error Event: ERR_NONFATAL +STEP 0: Error Event ------------------- A PCI bus error is detected by the PCI hardware. On powerpc, the slot is isolated, in that all I/O is blocked: all reads return 0xffffffff, @@ -228,7 +228,13 @@ proceeds to either STEP3 (Link Reset) or to STEP 5 (Resume Operations). If any driver returned PCI_ERS_RESULT_NEED_RESET, then the platform proceeds to STEP 4 (Slot Reset) -STEP 3: Slot Reset +STEP 3: Link Reset +------------------ +The platform resets the link. This is a PCI-Express specific step +and is done whenever a fatal error has been detected that can be +"solved" by resetting the link. + +STEP 4: Slot Reset ------------------ In response to a return value of PCI_ERS_RESULT_NEED_RESET, the @@ -314,7 +320,7 @@ Failure). >>> However, it probably should. -STEP 4: Resume Operations +STEP 5: Resume Operations ------------------------- The platform will call the resume() callback on all affected device drivers if all drivers on the segment have returned @@ -326,7 +332,7 @@ a result code. At this point, if a new error happens, the platform will restart a new error recovery sequence. -STEP 5: Permanent Failure +STEP 6: Permanent Failure ------------------------- A "permanent failure" has occurred, and the platform cannot recover the device. The platform will call error_detected() with a @@ -349,27 +355,6 @@ errors. See the discussion in powerpc/eeh-pci-error-recovery.txt for additional detail on real-life experience of the causes of software errors. -STEP 0: Error Event: ERR_FATAL -------------------- -PCI bus error is detected by the PCI hardware. On powerpc, the slot is -isolated, in that all I/O is blocked: all reads return 0xffffffff, all -writes are ignored. - -STEP 1: Remove devices --------------------- -Platform removes the devices depending on the error agent, it could be -this port for all subordinates or upstream component (likely downstream -port) - -STEP 2: Reset link --------------------- -The platform resets the link. This is a PCI-Express specific step and is -done whenever a fatal error has been detected that can be "solved" by -resetting the link. - -STEP 3: Re-enumerate the devices --------------------- -Initiates the re-enumeration. Conclusion; General Remarks --------------------------- |