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1585 lines
39 KiB
1585 lines
39 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* (C) Copyright 2002-2004 Greg Kroah-Hartman <[email protected]> |
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* (C) Copyright 2002-2004 IBM Corp. |
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* (C) Copyright 2003 Matthew Wilcox |
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* (C) Copyright 2003 Hewlett-Packard |
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* (C) Copyright 2004 Jon Smirl <[email protected]> |
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* (C) Copyright 2004 Silicon Graphics, Inc. Jesse Barnes <[email protected]> |
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* |
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* File attributes for PCI devices |
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* |
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* Modeled after usb's driverfs.c |
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*/ |
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|
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|
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#include <linux/kernel.h> |
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#include <linux/sched.h> |
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#include <linux/pci.h> |
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#include <linux/stat.h> |
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#include <linux/export.h> |
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#include <linux/topology.h> |
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#include <linux/mm.h> |
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#include <linux/fs.h> |
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#include <linux/capability.h> |
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#include <linux/security.h> |
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#include <linux/slab.h> |
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#include <linux/vgaarb.h> |
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#include <linux/pm_runtime.h> |
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#include <linux/of.h> |
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#include "pci.h" |
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|
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static int sysfs_initialized; /* = 0 */ |
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|
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/* show configuration fields */ |
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#define pci_config_attr(field, format_string) \ |
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static ssize_t \ |
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field##_show(struct device *dev, struct device_attribute *attr, char *buf) \ |
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{ \ |
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struct pci_dev *pdev; \ |
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\ |
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pdev = to_pci_dev(dev); \ |
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return sprintf(buf, format_string, pdev->field); \ |
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} \ |
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static DEVICE_ATTR_RO(field) |
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|
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pci_config_attr(vendor, "0x%04x\n"); |
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pci_config_attr(device, "0x%04x\n"); |
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pci_config_attr(subsystem_vendor, "0x%04x\n"); |
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pci_config_attr(subsystem_device, "0x%04x\n"); |
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pci_config_attr(revision, "0x%02x\n"); |
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pci_config_attr(class, "0x%06x\n"); |
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pci_config_attr(irq, "%u\n"); |
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|
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static ssize_t broken_parity_status_show(struct device *dev, |
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struct device_attribute *attr, |
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char *buf) |
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{ |
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struct pci_dev *pdev = to_pci_dev(dev); |
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return sprintf(buf, "%u\n", pdev->broken_parity_status); |
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} |
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|
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static ssize_t broken_parity_status_store(struct device *dev, |
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struct device_attribute *attr, |
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const char *buf, size_t count) |
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{ |
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struct pci_dev *pdev = to_pci_dev(dev); |
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unsigned long val; |
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|
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if (kstrtoul(buf, 0, &val) < 0) |
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return -EINVAL; |
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pdev->broken_parity_status = !!val; |
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|
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return count; |
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} |
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static DEVICE_ATTR_RW(broken_parity_status); |
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|
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static ssize_t pci_dev_show_local_cpu(struct device *dev, bool list, |
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struct device_attribute *attr, char *buf) |
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{ |
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const struct cpumask *mask; |
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|
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#ifdef CONFIG_NUMA |
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mask = (dev_to_node(dev) == -1) ? cpu_online_mask : |
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cpumask_of_node(dev_to_node(dev)); |
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#else |
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mask = cpumask_of_pcibus(to_pci_dev(dev)->bus); |
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#endif |
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return cpumap_print_to_pagebuf(list, buf, mask); |
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} |
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|
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static ssize_t local_cpus_show(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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return pci_dev_show_local_cpu(dev, false, attr, buf); |
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} |
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static DEVICE_ATTR_RO(local_cpus); |
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|
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static ssize_t local_cpulist_show(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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return pci_dev_show_local_cpu(dev, true, attr, buf); |
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} |
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static DEVICE_ATTR_RO(local_cpulist); |
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|
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/* |
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* PCI Bus Class Devices |
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*/ |
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static ssize_t cpuaffinity_show(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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const struct cpumask *cpumask = cpumask_of_pcibus(to_pci_bus(dev)); |
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return cpumap_print_to_pagebuf(false, buf, cpumask); |
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} |
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static DEVICE_ATTR_RO(cpuaffinity); |
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|
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static ssize_t cpulistaffinity_show(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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const struct cpumask *cpumask = cpumask_of_pcibus(to_pci_bus(dev)); |
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|
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return cpumap_print_to_pagebuf(true, buf, cpumask); |
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} |
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static DEVICE_ATTR_RO(cpulistaffinity); |
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static ssize_t power_state_show(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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struct pci_dev *pdev = to_pci_dev(dev); |
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|
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return sprintf(buf, "%s\n", pci_power_name(pdev->current_state)); |
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} |
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static DEVICE_ATTR_RO(power_state); |
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|
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/* show resources */ |
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static ssize_t resource_show(struct device *dev, struct device_attribute *attr, |
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char *buf) |
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{ |
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struct pci_dev *pci_dev = to_pci_dev(dev); |
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char *str = buf; |
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int i; |
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int max; |
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resource_size_t start, end; |
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|
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if (pci_dev->subordinate) |
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max = DEVICE_COUNT_RESOURCE; |
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else |
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max = PCI_BRIDGE_RESOURCES; |
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|
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for (i = 0; i < max; i++) { |
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struct resource *res = &pci_dev->resource[i]; |
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pci_resource_to_user(pci_dev, i, res, &start, &end); |
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str += sprintf(str, "0x%016llx 0x%016llx 0x%016llx\n", |
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(unsigned long long)start, |
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(unsigned long long)end, |
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(unsigned long long)res->flags); |
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} |
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return (str - buf); |
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} |
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static DEVICE_ATTR_RO(resource); |
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|
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static ssize_t max_link_speed_show(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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struct pci_dev *pdev = to_pci_dev(dev); |
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return sprintf(buf, "%s\n", |
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pci_speed_string(pcie_get_speed_cap(pdev))); |
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} |
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static DEVICE_ATTR_RO(max_link_speed); |
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static ssize_t max_link_width_show(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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struct pci_dev *pdev = to_pci_dev(dev); |
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return sprintf(buf, "%u\n", pcie_get_width_cap(pdev)); |
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} |
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static DEVICE_ATTR_RO(max_link_width); |
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static ssize_t current_link_speed_show(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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struct pci_dev *pci_dev = to_pci_dev(dev); |
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u16 linkstat; |
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int err; |
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enum pci_bus_speed speed; |
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err = pcie_capability_read_word(pci_dev, PCI_EXP_LNKSTA, &linkstat); |
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if (err) |
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return -EINVAL; |
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speed = pcie_link_speed[linkstat & PCI_EXP_LNKSTA_CLS]; |
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return sprintf(buf, "%s\n", pci_speed_string(speed)); |
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} |
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static DEVICE_ATTR_RO(current_link_speed); |
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static ssize_t current_link_width_show(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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struct pci_dev *pci_dev = to_pci_dev(dev); |
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u16 linkstat; |
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int err; |
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err = pcie_capability_read_word(pci_dev, PCI_EXP_LNKSTA, &linkstat); |
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if (err) |
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return -EINVAL; |
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return sprintf(buf, "%u\n", |
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(linkstat & PCI_EXP_LNKSTA_NLW) >> PCI_EXP_LNKSTA_NLW_SHIFT); |
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} |
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static DEVICE_ATTR_RO(current_link_width); |
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static ssize_t secondary_bus_number_show(struct device *dev, |
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struct device_attribute *attr, |
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char *buf) |
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{ |
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struct pci_dev *pci_dev = to_pci_dev(dev); |
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u8 sec_bus; |
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int err; |
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err = pci_read_config_byte(pci_dev, PCI_SECONDARY_BUS, &sec_bus); |
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if (err) |
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return -EINVAL; |
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return sprintf(buf, "%u\n", sec_bus); |
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} |
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static DEVICE_ATTR_RO(secondary_bus_number); |
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static ssize_t subordinate_bus_number_show(struct device *dev, |
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struct device_attribute *attr, |
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char *buf) |
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{ |
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struct pci_dev *pci_dev = to_pci_dev(dev); |
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u8 sub_bus; |
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int err; |
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err = pci_read_config_byte(pci_dev, PCI_SUBORDINATE_BUS, &sub_bus); |
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if (err) |
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return -EINVAL; |
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return sprintf(buf, "%u\n", sub_bus); |
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} |
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static DEVICE_ATTR_RO(subordinate_bus_number); |
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static ssize_t ari_enabled_show(struct device *dev, |
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struct device_attribute *attr, |
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char *buf) |
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{ |
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struct pci_dev *pci_dev = to_pci_dev(dev); |
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return sprintf(buf, "%u\n", pci_ari_enabled(pci_dev->bus)); |
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} |
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static DEVICE_ATTR_RO(ari_enabled); |
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static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, |
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char *buf) |
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{ |
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struct pci_dev *pci_dev = to_pci_dev(dev); |
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return sprintf(buf, "pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02X\n", |
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pci_dev->vendor, pci_dev->device, |
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pci_dev->subsystem_vendor, pci_dev->subsystem_device, |
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(u8)(pci_dev->class >> 16), (u8)(pci_dev->class >> 8), |
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(u8)(pci_dev->class)); |
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} |
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static DEVICE_ATTR_RO(modalias); |
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static ssize_t enable_store(struct device *dev, struct device_attribute *attr, |
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const char *buf, size_t count) |
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{ |
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struct pci_dev *pdev = to_pci_dev(dev); |
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unsigned long val; |
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ssize_t result = kstrtoul(buf, 0, &val); |
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|
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if (result < 0) |
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return result; |
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|
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/* this can crash the machine when done on the "wrong" device */ |
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if (!capable(CAP_SYS_ADMIN)) |
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return -EPERM; |
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device_lock(dev); |
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if (dev->driver) |
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result = -EBUSY; |
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else if (val) |
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result = pci_enable_device(pdev); |
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else if (pci_is_enabled(pdev)) |
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pci_disable_device(pdev); |
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else |
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result = -EIO; |
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device_unlock(dev); |
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return result < 0 ? result : count; |
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} |
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static ssize_t enable_show(struct device *dev, struct device_attribute *attr, |
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char *buf) |
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{ |
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struct pci_dev *pdev; |
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pdev = to_pci_dev(dev); |
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return sprintf(buf, "%u\n", atomic_read(&pdev->enable_cnt)); |
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} |
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static DEVICE_ATTR_RW(enable); |
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#ifdef CONFIG_NUMA |
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static ssize_t numa_node_store(struct device *dev, |
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struct device_attribute *attr, const char *buf, |
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size_t count) |
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{ |
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struct pci_dev *pdev = to_pci_dev(dev); |
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int node, ret; |
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if (!capable(CAP_SYS_ADMIN)) |
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return -EPERM; |
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ret = kstrtoint(buf, 0, &node); |
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if (ret) |
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return ret; |
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if ((node < 0 && node != NUMA_NO_NODE) || node >= MAX_NUMNODES) |
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return -EINVAL; |
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if (node != NUMA_NO_NODE && !node_online(node)) |
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return -EINVAL; |
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add_taint(TAINT_FIRMWARE_WORKAROUND, LOCKDEP_STILL_OK); |
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pci_alert(pdev, FW_BUG "Overriding NUMA node to %d. Contact your vendor for updates.", |
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node); |
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dev->numa_node = node; |
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return count; |
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} |
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static ssize_t numa_node_show(struct device *dev, struct device_attribute *attr, |
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char *buf) |
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{ |
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return sprintf(buf, "%d\n", dev->numa_node); |
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} |
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static DEVICE_ATTR_RW(numa_node); |
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#endif |
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static ssize_t dma_mask_bits_show(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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struct pci_dev *pdev = to_pci_dev(dev); |
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return sprintf(buf, "%d\n", fls64(pdev->dma_mask)); |
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} |
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static DEVICE_ATTR_RO(dma_mask_bits); |
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static ssize_t consistent_dma_mask_bits_show(struct device *dev, |
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struct device_attribute *attr, |
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char *buf) |
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{ |
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return sprintf(buf, "%d\n", fls64(dev->coherent_dma_mask)); |
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} |
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static DEVICE_ATTR_RO(consistent_dma_mask_bits); |
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static ssize_t msi_bus_show(struct device *dev, struct device_attribute *attr, |
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char *buf) |
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{ |
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struct pci_dev *pdev = to_pci_dev(dev); |
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struct pci_bus *subordinate = pdev->subordinate; |
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return sprintf(buf, "%u\n", subordinate ? |
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!(subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI) |
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: !pdev->no_msi); |
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} |
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static ssize_t msi_bus_store(struct device *dev, struct device_attribute *attr, |
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const char *buf, size_t count) |
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{ |
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struct pci_dev *pdev = to_pci_dev(dev); |
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struct pci_bus *subordinate = pdev->subordinate; |
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unsigned long val; |
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if (kstrtoul(buf, 0, &val) < 0) |
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return -EINVAL; |
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|
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if (!capable(CAP_SYS_ADMIN)) |
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return -EPERM; |
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|
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/* |
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* "no_msi" and "bus_flags" only affect what happens when a driver |
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* requests MSI or MSI-X. They don't affect any drivers that have |
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* already requested MSI or MSI-X. |
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*/ |
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if (!subordinate) { |
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pdev->no_msi = !val; |
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pci_info(pdev, "MSI/MSI-X %s for future drivers\n", |
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val ? "allowed" : "disallowed"); |
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return count; |
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} |
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if (val) |
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subordinate->bus_flags &= ~PCI_BUS_FLAGS_NO_MSI; |
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else |
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subordinate->bus_flags |= PCI_BUS_FLAGS_NO_MSI; |
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|
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dev_info(&subordinate->dev, "MSI/MSI-X %s for future drivers of devices on this bus\n", |
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val ? "allowed" : "disallowed"); |
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return count; |
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} |
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static DEVICE_ATTR_RW(msi_bus); |
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static ssize_t rescan_store(struct bus_type *bus, const char *buf, size_t count) |
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{ |
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unsigned long val; |
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struct pci_bus *b = NULL; |
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|
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if (kstrtoul(buf, 0, &val) < 0) |
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return -EINVAL; |
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|
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if (val) { |
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pci_lock_rescan_remove(); |
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while ((b = pci_find_next_bus(b)) != NULL) |
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pci_rescan_bus(b); |
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pci_unlock_rescan_remove(); |
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} |
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return count; |
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} |
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static BUS_ATTR_WO(rescan); |
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|
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static struct attribute *pci_bus_attrs[] = { |
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&bus_attr_rescan.attr, |
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NULL, |
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}; |
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|
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static const struct attribute_group pci_bus_group = { |
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.attrs = pci_bus_attrs, |
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}; |
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|
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const struct attribute_group *pci_bus_groups[] = { |
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&pci_bus_group, |
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NULL, |
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}; |
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static ssize_t dev_rescan_store(struct device *dev, |
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struct device_attribute *attr, const char *buf, |
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size_t count) |
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{ |
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unsigned long val; |
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struct pci_dev *pdev = to_pci_dev(dev); |
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|
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if (kstrtoul(buf, 0, &val) < 0) |
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return -EINVAL; |
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|
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if (val) { |
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pci_lock_rescan_remove(); |
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pci_rescan_bus(pdev->bus); |
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pci_unlock_rescan_remove(); |
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} |
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return count; |
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} |
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static struct device_attribute dev_attr_dev_rescan = __ATTR(rescan, 0200, NULL, |
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dev_rescan_store); |
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|
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static ssize_t remove_store(struct device *dev, struct device_attribute *attr, |
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const char *buf, size_t count) |
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{ |
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unsigned long val; |
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|
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if (kstrtoul(buf, 0, &val) < 0) |
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return -EINVAL; |
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|
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if (val && device_remove_file_self(dev, attr)) |
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pci_stop_and_remove_bus_device_locked(to_pci_dev(dev)); |
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return count; |
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} |
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static DEVICE_ATTR_IGNORE_LOCKDEP(remove, 0220, NULL, |
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remove_store); |
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|
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static ssize_t bus_rescan_store(struct device *dev, |
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struct device_attribute *attr, |
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const char *buf, size_t count) |
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{ |
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unsigned long val; |
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struct pci_bus *bus = to_pci_bus(dev); |
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|
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if (kstrtoul(buf, 0, &val) < 0) |
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return -EINVAL; |
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|
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if (val) { |
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pci_lock_rescan_remove(); |
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if (!pci_is_root_bus(bus) && list_empty(&bus->devices)) |
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pci_rescan_bus_bridge_resize(bus->self); |
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else |
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pci_rescan_bus(bus); |
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pci_unlock_rescan_remove(); |
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} |
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return count; |
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} |
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static struct device_attribute dev_attr_bus_rescan = __ATTR(rescan, 0200, NULL, |
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bus_rescan_store); |
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|
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#if defined(CONFIG_PM) && defined(CONFIG_ACPI) |
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static ssize_t d3cold_allowed_store(struct device *dev, |
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struct device_attribute *attr, |
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const char *buf, size_t count) |
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{ |
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struct pci_dev *pdev = to_pci_dev(dev); |
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unsigned long val; |
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|
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if (kstrtoul(buf, 0, &val) < 0) |
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return -EINVAL; |
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|
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pdev->d3cold_allowed = !!val; |
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if (pdev->d3cold_allowed) |
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pci_d3cold_enable(pdev); |
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else |
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pci_d3cold_disable(pdev); |
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|
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pm_runtime_resume(dev); |
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|
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return count; |
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} |
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|
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static ssize_t d3cold_allowed_show(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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struct pci_dev *pdev = to_pci_dev(dev); |
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return sprintf(buf, "%u\n", pdev->d3cold_allowed); |
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} |
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static DEVICE_ATTR_RW(d3cold_allowed); |
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#endif |
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|
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#ifdef CONFIG_OF |
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static ssize_t devspec_show(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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struct pci_dev *pdev = to_pci_dev(dev); |
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struct device_node *np = pci_device_to_OF_node(pdev); |
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|
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if (np == NULL) |
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return 0; |
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return sprintf(buf, "%pOF", np); |
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} |
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static DEVICE_ATTR_RO(devspec); |
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#endif |
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|
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static ssize_t driver_override_store(struct device *dev, |
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struct device_attribute *attr, |
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const char *buf, size_t count) |
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{ |
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struct pci_dev *pdev = to_pci_dev(dev); |
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char *driver_override, *old, *cp; |
|
|
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/* We need to keep extra room for a newline */ |
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if (count >= (PAGE_SIZE - 1)) |
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return -EINVAL; |
|
|
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driver_override = kstrndup(buf, count, GFP_KERNEL); |
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if (!driver_override) |
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return -ENOMEM; |
|
|
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cp = strchr(driver_override, '\n'); |
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if (cp) |
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*cp = '\0'; |
|
|
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device_lock(dev); |
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old = pdev->driver_override; |
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if (strlen(driver_override)) { |
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pdev->driver_override = driver_override; |
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} else { |
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kfree(driver_override); |
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pdev->driver_override = NULL; |
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} |
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device_unlock(dev); |
|
|
|
kfree(old); |
|
|
|
return count; |
|
} |
|
|
|
static ssize_t driver_override_show(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct pci_dev *pdev = to_pci_dev(dev); |
|
ssize_t len; |
|
|
|
device_lock(dev); |
|
len = scnprintf(buf, PAGE_SIZE, "%s\n", pdev->driver_override); |
|
device_unlock(dev); |
|
return len; |
|
} |
|
static DEVICE_ATTR_RW(driver_override); |
|
|
|
static struct attribute *pci_dev_attrs[] = { |
|
&dev_attr_power_state.attr, |
|
&dev_attr_resource.attr, |
|
&dev_attr_vendor.attr, |
|
&dev_attr_device.attr, |
|
&dev_attr_subsystem_vendor.attr, |
|
&dev_attr_subsystem_device.attr, |
|
&dev_attr_revision.attr, |
|
&dev_attr_class.attr, |
|
&dev_attr_irq.attr, |
|
&dev_attr_local_cpus.attr, |
|
&dev_attr_local_cpulist.attr, |
|
&dev_attr_modalias.attr, |
|
#ifdef CONFIG_NUMA |
|
&dev_attr_numa_node.attr, |
|
#endif |
|
&dev_attr_dma_mask_bits.attr, |
|
&dev_attr_consistent_dma_mask_bits.attr, |
|
&dev_attr_enable.attr, |
|
&dev_attr_broken_parity_status.attr, |
|
&dev_attr_msi_bus.attr, |
|
#if defined(CONFIG_PM) && defined(CONFIG_ACPI) |
|
&dev_attr_d3cold_allowed.attr, |
|
#endif |
|
#ifdef CONFIG_OF |
|
&dev_attr_devspec.attr, |
|
#endif |
|
&dev_attr_driver_override.attr, |
|
&dev_attr_ari_enabled.attr, |
|
NULL, |
|
}; |
|
|
|
static struct attribute *pci_bridge_attrs[] = { |
|
&dev_attr_subordinate_bus_number.attr, |
|
&dev_attr_secondary_bus_number.attr, |
|
NULL, |
|
}; |
|
|
|
static struct attribute *pcie_dev_attrs[] = { |
|
&dev_attr_current_link_speed.attr, |
|
&dev_attr_current_link_width.attr, |
|
&dev_attr_max_link_width.attr, |
|
&dev_attr_max_link_speed.attr, |
|
NULL, |
|
}; |
|
|
|
static struct attribute *pcibus_attrs[] = { |
|
&dev_attr_bus_rescan.attr, |
|
&dev_attr_cpuaffinity.attr, |
|
&dev_attr_cpulistaffinity.attr, |
|
NULL, |
|
}; |
|
|
|
static const struct attribute_group pcibus_group = { |
|
.attrs = pcibus_attrs, |
|
}; |
|
|
|
const struct attribute_group *pcibus_groups[] = { |
|
&pcibus_group, |
|
NULL, |
|
}; |
|
|
|
static ssize_t boot_vga_show(struct device *dev, struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
struct pci_dev *pdev = to_pci_dev(dev); |
|
struct pci_dev *vga_dev = vga_default_device(); |
|
|
|
if (vga_dev) |
|
return sprintf(buf, "%u\n", (pdev == vga_dev)); |
|
|
|
return sprintf(buf, "%u\n", |
|
!!(pdev->resource[PCI_ROM_RESOURCE].flags & |
|
IORESOURCE_ROM_SHADOW)); |
|
} |
|
static DEVICE_ATTR_RO(boot_vga); |
|
|
|
static ssize_t pci_read_config(struct file *filp, struct kobject *kobj, |
|
struct bin_attribute *bin_attr, char *buf, |
|
loff_t off, size_t count) |
|
{ |
|
struct pci_dev *dev = to_pci_dev(kobj_to_dev(kobj)); |
|
unsigned int size = 64; |
|
loff_t init_off = off; |
|
u8 *data = (u8 *) buf; |
|
|
|
/* Several chips lock up trying to read undefined config space */ |
|
if (file_ns_capable(filp, &init_user_ns, CAP_SYS_ADMIN)) |
|
size = dev->cfg_size; |
|
else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) |
|
size = 128; |
|
|
|
if (off > size) |
|
return 0; |
|
if (off + count > size) { |
|
size -= off; |
|
count = size; |
|
} else { |
|
size = count; |
|
} |
|
|
|
pci_config_pm_runtime_get(dev); |
|
|
|
if ((off & 1) && size) { |
|
u8 val; |
|
pci_user_read_config_byte(dev, off, &val); |
|
data[off - init_off] = val; |
|
off++; |
|
size--; |
|
} |
|
|
|
if ((off & 3) && size > 2) { |
|
u16 val; |
|
pci_user_read_config_word(dev, off, &val); |
|
data[off - init_off] = val & 0xff; |
|
data[off - init_off + 1] = (val >> 8) & 0xff; |
|
off += 2; |
|
size -= 2; |
|
} |
|
|
|
while (size > 3) { |
|
u32 val; |
|
pci_user_read_config_dword(dev, off, &val); |
|
data[off - init_off] = val & 0xff; |
|
data[off - init_off + 1] = (val >> 8) & 0xff; |
|
data[off - init_off + 2] = (val >> 16) & 0xff; |
|
data[off - init_off + 3] = (val >> 24) & 0xff; |
|
off += 4; |
|
size -= 4; |
|
cond_resched(); |
|
} |
|
|
|
if (size >= 2) { |
|
u16 val; |
|
pci_user_read_config_word(dev, off, &val); |
|
data[off - init_off] = val & 0xff; |
|
data[off - init_off + 1] = (val >> 8) & 0xff; |
|
off += 2; |
|
size -= 2; |
|
} |
|
|
|
if (size > 0) { |
|
u8 val; |
|
pci_user_read_config_byte(dev, off, &val); |
|
data[off - init_off] = val; |
|
off++; |
|
--size; |
|
} |
|
|
|
pci_config_pm_runtime_put(dev); |
|
|
|
return count; |
|
} |
|
|
|
static ssize_t pci_write_config(struct file *filp, struct kobject *kobj, |
|
struct bin_attribute *bin_attr, char *buf, |
|
loff_t off, size_t count) |
|
{ |
|
struct pci_dev *dev = to_pci_dev(kobj_to_dev(kobj)); |
|
unsigned int size = count; |
|
loff_t init_off = off; |
|
u8 *data = (u8 *) buf; |
|
int ret; |
|
|
|
ret = security_locked_down(LOCKDOWN_PCI_ACCESS); |
|
if (ret) |
|
return ret; |
|
|
|
if (off > dev->cfg_size) |
|
return 0; |
|
if (off + count > dev->cfg_size) { |
|
size = dev->cfg_size - off; |
|
count = size; |
|
} |
|
|
|
pci_config_pm_runtime_get(dev); |
|
|
|
if ((off & 1) && size) { |
|
pci_user_write_config_byte(dev, off, data[off - init_off]); |
|
off++; |
|
size--; |
|
} |
|
|
|
if ((off & 3) && size > 2) { |
|
u16 val = data[off - init_off]; |
|
val |= (u16) data[off - init_off + 1] << 8; |
|
pci_user_write_config_word(dev, off, val); |
|
off += 2; |
|
size -= 2; |
|
} |
|
|
|
while (size > 3) { |
|
u32 val = data[off - init_off]; |
|
val |= (u32) data[off - init_off + 1] << 8; |
|
val |= (u32) data[off - init_off + 2] << 16; |
|
val |= (u32) data[off - init_off + 3] << 24; |
|
pci_user_write_config_dword(dev, off, val); |
|
off += 4; |
|
size -= 4; |
|
} |
|
|
|
if (size >= 2) { |
|
u16 val = data[off - init_off]; |
|
val |= (u16) data[off - init_off + 1] << 8; |
|
pci_user_write_config_word(dev, off, val); |
|
off += 2; |
|
size -= 2; |
|
} |
|
|
|
if (size) { |
|
pci_user_write_config_byte(dev, off, data[off - init_off]); |
|
off++; |
|
--size; |
|
} |
|
|
|
pci_config_pm_runtime_put(dev); |
|
|
|
return count; |
|
} |
|
|
|
#ifdef HAVE_PCI_LEGACY |
|
/** |
|
* pci_read_legacy_io - read byte(s) from legacy I/O port space |
|
* @filp: open sysfs file |
|
* @kobj: kobject corresponding to file to read from |
|
* @bin_attr: struct bin_attribute for this file |
|
* @buf: buffer to store results |
|
* @off: offset into legacy I/O port space |
|
* @count: number of bytes to read |
|
* |
|
* Reads 1, 2, or 4 bytes from legacy I/O port space using an arch specific |
|
* callback routine (pci_legacy_read). |
|
*/ |
|
static ssize_t pci_read_legacy_io(struct file *filp, struct kobject *kobj, |
|
struct bin_attribute *bin_attr, char *buf, |
|
loff_t off, size_t count) |
|
{ |
|
struct pci_bus *bus = to_pci_bus(kobj_to_dev(kobj)); |
|
|
|
/* Only support 1, 2 or 4 byte accesses */ |
|
if (count != 1 && count != 2 && count != 4) |
|
return -EINVAL; |
|
|
|
return pci_legacy_read(bus, off, (u32 *)buf, count); |
|
} |
|
|
|
/** |
|
* pci_write_legacy_io - write byte(s) to legacy I/O port space |
|
* @filp: open sysfs file |
|
* @kobj: kobject corresponding to file to read from |
|
* @bin_attr: struct bin_attribute for this file |
|
* @buf: buffer containing value to be written |
|
* @off: offset into legacy I/O port space |
|
* @count: number of bytes to write |
|
* |
|
* Writes 1, 2, or 4 bytes from legacy I/O port space using an arch specific |
|
* callback routine (pci_legacy_write). |
|
*/ |
|
static ssize_t pci_write_legacy_io(struct file *filp, struct kobject *kobj, |
|
struct bin_attribute *bin_attr, char *buf, |
|
loff_t off, size_t count) |
|
{ |
|
struct pci_bus *bus = to_pci_bus(kobj_to_dev(kobj)); |
|
|
|
/* Only support 1, 2 or 4 byte accesses */ |
|
if (count != 1 && count != 2 && count != 4) |
|
return -EINVAL; |
|
|
|
return pci_legacy_write(bus, off, *(u32 *)buf, count); |
|
} |
|
|
|
/** |
|
* pci_mmap_legacy_mem - map legacy PCI memory into user memory space |
|
* @filp: open sysfs file |
|
* @kobj: kobject corresponding to device to be mapped |
|
* @attr: struct bin_attribute for this file |
|
* @vma: struct vm_area_struct passed to mmap |
|
* |
|
* Uses an arch specific callback, pci_mmap_legacy_mem_page_range, to mmap |
|
* legacy memory space (first meg of bus space) into application virtual |
|
* memory space. |
|
*/ |
|
static int pci_mmap_legacy_mem(struct file *filp, struct kobject *kobj, |
|
struct bin_attribute *attr, |
|
struct vm_area_struct *vma) |
|
{ |
|
struct pci_bus *bus = to_pci_bus(kobj_to_dev(kobj)); |
|
|
|
return pci_mmap_legacy_page_range(bus, vma, pci_mmap_mem); |
|
} |
|
|
|
/** |
|
* pci_mmap_legacy_io - map legacy PCI IO into user memory space |
|
* @filp: open sysfs file |
|
* @kobj: kobject corresponding to device to be mapped |
|
* @attr: struct bin_attribute for this file |
|
* @vma: struct vm_area_struct passed to mmap |
|
* |
|
* Uses an arch specific callback, pci_mmap_legacy_io_page_range, to mmap |
|
* legacy IO space (first meg of bus space) into application virtual |
|
* memory space. Returns -ENOSYS if the operation isn't supported |
|
*/ |
|
static int pci_mmap_legacy_io(struct file *filp, struct kobject *kobj, |
|
struct bin_attribute *attr, |
|
struct vm_area_struct *vma) |
|
{ |
|
struct pci_bus *bus = to_pci_bus(kobj_to_dev(kobj)); |
|
|
|
return pci_mmap_legacy_page_range(bus, vma, pci_mmap_io); |
|
} |
|
|
|
/** |
|
* pci_adjust_legacy_attr - adjustment of legacy file attributes |
|
* @b: bus to create files under |
|
* @mmap_type: I/O port or memory |
|
* |
|
* Stub implementation. Can be overridden by arch if necessary. |
|
*/ |
|
void __weak pci_adjust_legacy_attr(struct pci_bus *b, |
|
enum pci_mmap_state mmap_type) |
|
{ |
|
} |
|
|
|
/** |
|
* pci_create_legacy_files - create legacy I/O port and memory files |
|
* @b: bus to create files under |
|
* |
|
* Some platforms allow access to legacy I/O port and ISA memory space on |
|
* a per-bus basis. This routine creates the files and ties them into |
|
* their associated read, write and mmap files from pci-sysfs.c |
|
* |
|
* On error unwind, but don't propagate the error to the caller |
|
* as it is ok to set up the PCI bus without these files. |
|
*/ |
|
void pci_create_legacy_files(struct pci_bus *b) |
|
{ |
|
int error; |
|
|
|
if (!sysfs_initialized) |
|
return; |
|
|
|
b->legacy_io = kcalloc(2, sizeof(struct bin_attribute), |
|
GFP_ATOMIC); |
|
if (!b->legacy_io) |
|
goto kzalloc_err; |
|
|
|
sysfs_bin_attr_init(b->legacy_io); |
|
b->legacy_io->attr.name = "legacy_io"; |
|
b->legacy_io->size = 0xffff; |
|
b->legacy_io->attr.mode = 0600; |
|
b->legacy_io->read = pci_read_legacy_io; |
|
b->legacy_io->write = pci_write_legacy_io; |
|
b->legacy_io->mmap = pci_mmap_legacy_io; |
|
b->legacy_io->mapping = iomem_get_mapping(); |
|
pci_adjust_legacy_attr(b, pci_mmap_io); |
|
error = device_create_bin_file(&b->dev, b->legacy_io); |
|
if (error) |
|
goto legacy_io_err; |
|
|
|
/* Allocated above after the legacy_io struct */ |
|
b->legacy_mem = b->legacy_io + 1; |
|
sysfs_bin_attr_init(b->legacy_mem); |
|
b->legacy_mem->attr.name = "legacy_mem"; |
|
b->legacy_mem->size = 1024*1024; |
|
b->legacy_mem->attr.mode = 0600; |
|
b->legacy_mem->mmap = pci_mmap_legacy_mem; |
|
b->legacy_io->mapping = iomem_get_mapping(); |
|
pci_adjust_legacy_attr(b, pci_mmap_mem); |
|
error = device_create_bin_file(&b->dev, b->legacy_mem); |
|
if (error) |
|
goto legacy_mem_err; |
|
|
|
return; |
|
|
|
legacy_mem_err: |
|
device_remove_bin_file(&b->dev, b->legacy_io); |
|
legacy_io_err: |
|
kfree(b->legacy_io); |
|
b->legacy_io = NULL; |
|
kzalloc_err: |
|
dev_warn(&b->dev, "could not create legacy I/O port and ISA memory resources in sysfs\n"); |
|
} |
|
|
|
void pci_remove_legacy_files(struct pci_bus *b) |
|
{ |
|
if (b->legacy_io) { |
|
device_remove_bin_file(&b->dev, b->legacy_io); |
|
device_remove_bin_file(&b->dev, b->legacy_mem); |
|
kfree(b->legacy_io); /* both are allocated here */ |
|
} |
|
} |
|
#endif /* HAVE_PCI_LEGACY */ |
|
|
|
#if defined(HAVE_PCI_MMAP) || defined(ARCH_GENERIC_PCI_MMAP_RESOURCE) |
|
|
|
int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vma, |
|
enum pci_mmap_api mmap_api) |
|
{ |
|
unsigned long nr, start, size; |
|
resource_size_t pci_start = 0, pci_end; |
|
|
|
if (pci_resource_len(pdev, resno) == 0) |
|
return 0; |
|
nr = vma_pages(vma); |
|
start = vma->vm_pgoff; |
|
size = ((pci_resource_len(pdev, resno) - 1) >> PAGE_SHIFT) + 1; |
|
if (mmap_api == PCI_MMAP_PROCFS) { |
|
pci_resource_to_user(pdev, resno, &pdev->resource[resno], |
|
&pci_start, &pci_end); |
|
pci_start >>= PAGE_SHIFT; |
|
} |
|
if (start >= pci_start && start < pci_start + size && |
|
start + nr <= pci_start + size) |
|
return 1; |
|
return 0; |
|
} |
|
|
|
/** |
|
* pci_mmap_resource - map a PCI resource into user memory space |
|
* @kobj: kobject for mapping |
|
* @attr: struct bin_attribute for the file being mapped |
|
* @vma: struct vm_area_struct passed into the mmap |
|
* @write_combine: 1 for write_combine mapping |
|
* |
|
* Use the regular PCI mapping routines to map a PCI resource into userspace. |
|
*/ |
|
static int pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr, |
|
struct vm_area_struct *vma, int write_combine) |
|
{ |
|
struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj)); |
|
int bar = (unsigned long)attr->private; |
|
enum pci_mmap_state mmap_type; |
|
struct resource *res = &pdev->resource[bar]; |
|
int ret; |
|
|
|
ret = security_locked_down(LOCKDOWN_PCI_ACCESS); |
|
if (ret) |
|
return ret; |
|
|
|
if (res->flags & IORESOURCE_MEM && iomem_is_exclusive(res->start)) |
|
return -EINVAL; |
|
|
|
if (!pci_mmap_fits(pdev, bar, vma, PCI_MMAP_SYSFS)) |
|
return -EINVAL; |
|
|
|
mmap_type = res->flags & IORESOURCE_MEM ? pci_mmap_mem : pci_mmap_io; |
|
|
|
return pci_mmap_resource_range(pdev, bar, vma, mmap_type, write_combine); |
|
} |
|
|
|
static int pci_mmap_resource_uc(struct file *filp, struct kobject *kobj, |
|
struct bin_attribute *attr, |
|
struct vm_area_struct *vma) |
|
{ |
|
return pci_mmap_resource(kobj, attr, vma, 0); |
|
} |
|
|
|
static int pci_mmap_resource_wc(struct file *filp, struct kobject *kobj, |
|
struct bin_attribute *attr, |
|
struct vm_area_struct *vma) |
|
{ |
|
return pci_mmap_resource(kobj, attr, vma, 1); |
|
} |
|
|
|
static ssize_t pci_resource_io(struct file *filp, struct kobject *kobj, |
|
struct bin_attribute *attr, char *buf, |
|
loff_t off, size_t count, bool write) |
|
{ |
|
struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj)); |
|
int bar = (unsigned long)attr->private; |
|
unsigned long port = off; |
|
|
|
port += pci_resource_start(pdev, bar); |
|
|
|
if (port > pci_resource_end(pdev, bar)) |
|
return 0; |
|
|
|
if (port + count - 1 > pci_resource_end(pdev, bar)) |
|
return -EINVAL; |
|
|
|
switch (count) { |
|
case 1: |
|
if (write) |
|
outb(*(u8 *)buf, port); |
|
else |
|
*(u8 *)buf = inb(port); |
|
return 1; |
|
case 2: |
|
if (write) |
|
outw(*(u16 *)buf, port); |
|
else |
|
*(u16 *)buf = inw(port); |
|
return 2; |
|
case 4: |
|
if (write) |
|
outl(*(u32 *)buf, port); |
|
else |
|
*(u32 *)buf = inl(port); |
|
return 4; |
|
} |
|
return -EINVAL; |
|
} |
|
|
|
static ssize_t pci_read_resource_io(struct file *filp, struct kobject *kobj, |
|
struct bin_attribute *attr, char *buf, |
|
loff_t off, size_t count) |
|
{ |
|
return pci_resource_io(filp, kobj, attr, buf, off, count, false); |
|
} |
|
|
|
static ssize_t pci_write_resource_io(struct file *filp, struct kobject *kobj, |
|
struct bin_attribute *attr, char *buf, |
|
loff_t off, size_t count) |
|
{ |
|
int ret; |
|
|
|
ret = security_locked_down(LOCKDOWN_PCI_ACCESS); |
|
if (ret) |
|
return ret; |
|
|
|
return pci_resource_io(filp, kobj, attr, buf, off, count, true); |
|
} |
|
|
|
/** |
|
* pci_remove_resource_files - cleanup resource files |
|
* @pdev: dev to cleanup |
|
* |
|
* If we created resource files for @pdev, remove them from sysfs and |
|
* free their resources. |
|
*/ |
|
static void pci_remove_resource_files(struct pci_dev *pdev) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < PCI_STD_NUM_BARS; i++) { |
|
struct bin_attribute *res_attr; |
|
|
|
res_attr = pdev->res_attr[i]; |
|
if (res_attr) { |
|
sysfs_remove_bin_file(&pdev->dev.kobj, res_attr); |
|
kfree(res_attr); |
|
} |
|
|
|
res_attr = pdev->res_attr_wc[i]; |
|
if (res_attr) { |
|
sysfs_remove_bin_file(&pdev->dev.kobj, res_attr); |
|
kfree(res_attr); |
|
} |
|
} |
|
} |
|
|
|
static int pci_create_attr(struct pci_dev *pdev, int num, int write_combine) |
|
{ |
|
/* allocate attribute structure, piggyback attribute name */ |
|
int name_len = write_combine ? 13 : 10; |
|
struct bin_attribute *res_attr; |
|
char *res_attr_name; |
|
int retval; |
|
|
|
res_attr = kzalloc(sizeof(*res_attr) + name_len, GFP_ATOMIC); |
|
if (!res_attr) |
|
return -ENOMEM; |
|
|
|
res_attr_name = (char *)(res_attr + 1); |
|
|
|
sysfs_bin_attr_init(res_attr); |
|
if (write_combine) { |
|
pdev->res_attr_wc[num] = res_attr; |
|
sprintf(res_attr_name, "resource%d_wc", num); |
|
res_attr->mmap = pci_mmap_resource_wc; |
|
} else { |
|
pdev->res_attr[num] = res_attr; |
|
sprintf(res_attr_name, "resource%d", num); |
|
if (pci_resource_flags(pdev, num) & IORESOURCE_IO) { |
|
res_attr->read = pci_read_resource_io; |
|
res_attr->write = pci_write_resource_io; |
|
if (arch_can_pci_mmap_io()) |
|
res_attr->mmap = pci_mmap_resource_uc; |
|
} else { |
|
res_attr->mmap = pci_mmap_resource_uc; |
|
} |
|
} |
|
if (res_attr->mmap) |
|
res_attr->mapping = iomem_get_mapping(); |
|
res_attr->attr.name = res_attr_name; |
|
res_attr->attr.mode = 0600; |
|
res_attr->size = pci_resource_len(pdev, num); |
|
res_attr->private = (void *)(unsigned long)num; |
|
retval = sysfs_create_bin_file(&pdev->dev.kobj, res_attr); |
|
if (retval) |
|
kfree(res_attr); |
|
|
|
return retval; |
|
} |
|
|
|
/** |
|
* pci_create_resource_files - create resource files in sysfs for @dev |
|
* @pdev: dev in question |
|
* |
|
* Walk the resources in @pdev creating files for each resource available. |
|
*/ |
|
static int pci_create_resource_files(struct pci_dev *pdev) |
|
{ |
|
int i; |
|
int retval; |
|
|
|
/* Expose the PCI resources from this device as files */ |
|
for (i = 0; i < PCI_STD_NUM_BARS; i++) { |
|
|
|
/* skip empty resources */ |
|
if (!pci_resource_len(pdev, i)) |
|
continue; |
|
|
|
retval = pci_create_attr(pdev, i, 0); |
|
/* for prefetchable resources, create a WC mappable file */ |
|
if (!retval && arch_can_pci_mmap_wc() && |
|
pdev->resource[i].flags & IORESOURCE_PREFETCH) |
|
retval = pci_create_attr(pdev, i, 1); |
|
if (retval) { |
|
pci_remove_resource_files(pdev); |
|
return retval; |
|
} |
|
} |
|
return 0; |
|
} |
|
#else /* !(defined(HAVE_PCI_MMAP) || defined(ARCH_GENERIC_PCI_MMAP_RESOURCE)) */ |
|
int __weak pci_create_resource_files(struct pci_dev *dev) { return 0; } |
|
void __weak pci_remove_resource_files(struct pci_dev *dev) { return; } |
|
#endif |
|
|
|
/** |
|
* pci_write_rom - used to enable access to the PCI ROM display |
|
* @filp: sysfs file |
|
* @kobj: kernel object handle |
|
* @bin_attr: struct bin_attribute for this file |
|
* @buf: user input |
|
* @off: file offset |
|
* @count: number of byte in input |
|
* |
|
* writing anything except 0 enables it |
|
*/ |
|
static ssize_t pci_write_rom(struct file *filp, struct kobject *kobj, |
|
struct bin_attribute *bin_attr, char *buf, |
|
loff_t off, size_t count) |
|
{ |
|
struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj)); |
|
|
|
if ((off == 0) && (*buf == '0') && (count == 2)) |
|
pdev->rom_attr_enabled = 0; |
|
else |
|
pdev->rom_attr_enabled = 1; |
|
|
|
return count; |
|
} |
|
|
|
/** |
|
* pci_read_rom - read a PCI ROM |
|
* @filp: sysfs file |
|
* @kobj: kernel object handle |
|
* @bin_attr: struct bin_attribute for this file |
|
* @buf: where to put the data we read from the ROM |
|
* @off: file offset |
|
* @count: number of bytes to read |
|
* |
|
* Put @count bytes starting at @off into @buf from the ROM in the PCI |
|
* device corresponding to @kobj. |
|
*/ |
|
static ssize_t pci_read_rom(struct file *filp, struct kobject *kobj, |
|
struct bin_attribute *bin_attr, char *buf, |
|
loff_t off, size_t count) |
|
{ |
|
struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj)); |
|
void __iomem *rom; |
|
size_t size; |
|
|
|
if (!pdev->rom_attr_enabled) |
|
return -EINVAL; |
|
|
|
rom = pci_map_rom(pdev, &size); /* size starts out as PCI window size */ |
|
if (!rom || !size) |
|
return -EIO; |
|
|
|
if (off >= size) |
|
count = 0; |
|
else { |
|
if (off + count > size) |
|
count = size - off; |
|
|
|
memcpy_fromio(buf, rom + off, count); |
|
} |
|
pci_unmap_rom(pdev, rom); |
|
|
|
return count; |
|
} |
|
|
|
static const struct bin_attribute pci_config_attr = { |
|
.attr = { |
|
.name = "config", |
|
.mode = 0644, |
|
}, |
|
.size = PCI_CFG_SPACE_SIZE, |
|
.read = pci_read_config, |
|
.write = pci_write_config, |
|
}; |
|
|
|
static const struct bin_attribute pcie_config_attr = { |
|
.attr = { |
|
.name = "config", |
|
.mode = 0644, |
|
}, |
|
.size = PCI_CFG_SPACE_EXP_SIZE, |
|
.read = pci_read_config, |
|
.write = pci_write_config, |
|
}; |
|
|
|
static ssize_t reset_store(struct device *dev, struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
struct pci_dev *pdev = to_pci_dev(dev); |
|
unsigned long val; |
|
ssize_t result = kstrtoul(buf, 0, &val); |
|
|
|
if (result < 0) |
|
return result; |
|
|
|
if (val != 1) |
|
return -EINVAL; |
|
|
|
pm_runtime_get_sync(dev); |
|
result = pci_reset_function(pdev); |
|
pm_runtime_put(dev); |
|
if (result < 0) |
|
return result; |
|
|
|
return count; |
|
} |
|
|
|
static DEVICE_ATTR(reset, 0200, NULL, reset_store); |
|
|
|
static int pci_create_capabilities_sysfs(struct pci_dev *dev) |
|
{ |
|
int retval; |
|
|
|
pcie_vpd_create_sysfs_dev_files(dev); |
|
|
|
if (dev->reset_fn) { |
|
retval = device_create_file(&dev->dev, &dev_attr_reset); |
|
if (retval) |
|
goto error; |
|
} |
|
return 0; |
|
|
|
error: |
|
pcie_vpd_remove_sysfs_dev_files(dev); |
|
return retval; |
|
} |
|
|
|
int __must_check pci_create_sysfs_dev_files(struct pci_dev *pdev) |
|
{ |
|
int retval; |
|
int rom_size; |
|
struct bin_attribute *attr; |
|
|
|
if (!sysfs_initialized) |
|
return -EACCES; |
|
|
|
if (pdev->cfg_size > PCI_CFG_SPACE_SIZE) |
|
retval = sysfs_create_bin_file(&pdev->dev.kobj, &pcie_config_attr); |
|
else |
|
retval = sysfs_create_bin_file(&pdev->dev.kobj, &pci_config_attr); |
|
if (retval) |
|
goto err; |
|
|
|
retval = pci_create_resource_files(pdev); |
|
if (retval) |
|
goto err_config_file; |
|
|
|
/* If the device has a ROM, try to expose it in sysfs. */ |
|
rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE); |
|
if (rom_size) { |
|
attr = kzalloc(sizeof(*attr), GFP_ATOMIC); |
|
if (!attr) { |
|
retval = -ENOMEM; |
|
goto err_resource_files; |
|
} |
|
sysfs_bin_attr_init(attr); |
|
attr->size = rom_size; |
|
attr->attr.name = "rom"; |
|
attr->attr.mode = 0600; |
|
attr->read = pci_read_rom; |
|
attr->write = pci_write_rom; |
|
retval = sysfs_create_bin_file(&pdev->dev.kobj, attr); |
|
if (retval) { |
|
kfree(attr); |
|
goto err_resource_files; |
|
} |
|
pdev->rom_attr = attr; |
|
} |
|
|
|
/* add sysfs entries for various capabilities */ |
|
retval = pci_create_capabilities_sysfs(pdev); |
|
if (retval) |
|
goto err_rom_file; |
|
|
|
pci_create_firmware_label_files(pdev); |
|
|
|
return 0; |
|
|
|
err_rom_file: |
|
if (pdev->rom_attr) { |
|
sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr); |
|
kfree(pdev->rom_attr); |
|
pdev->rom_attr = NULL; |
|
} |
|
err_resource_files: |
|
pci_remove_resource_files(pdev); |
|
err_config_file: |
|
if (pdev->cfg_size > PCI_CFG_SPACE_SIZE) |
|
sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr); |
|
else |
|
sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); |
|
err: |
|
return retval; |
|
} |
|
|
|
static void pci_remove_capabilities_sysfs(struct pci_dev *dev) |
|
{ |
|
pcie_vpd_remove_sysfs_dev_files(dev); |
|
if (dev->reset_fn) { |
|
device_remove_file(&dev->dev, &dev_attr_reset); |
|
dev->reset_fn = 0; |
|
} |
|
} |
|
|
|
/** |
|
* pci_remove_sysfs_dev_files - cleanup PCI specific sysfs files |
|
* @pdev: device whose entries we should free |
|
* |
|
* Cleanup when @pdev is removed from sysfs. |
|
*/ |
|
void pci_remove_sysfs_dev_files(struct pci_dev *pdev) |
|
{ |
|
if (!sysfs_initialized) |
|
return; |
|
|
|
pci_remove_capabilities_sysfs(pdev); |
|
|
|
if (pdev->cfg_size > PCI_CFG_SPACE_SIZE) |
|
sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr); |
|
else |
|
sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); |
|
|
|
pci_remove_resource_files(pdev); |
|
|
|
if (pdev->rom_attr) { |
|
sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr); |
|
kfree(pdev->rom_attr); |
|
pdev->rom_attr = NULL; |
|
} |
|
|
|
pci_remove_firmware_label_files(pdev); |
|
} |
|
|
|
static int __init pci_sysfs_init(void) |
|
{ |
|
struct pci_dev *pdev = NULL; |
|
struct pci_bus *pbus = NULL; |
|
int retval; |
|
|
|
sysfs_initialized = 1; |
|
for_each_pci_dev(pdev) { |
|
retval = pci_create_sysfs_dev_files(pdev); |
|
if (retval) { |
|
pci_dev_put(pdev); |
|
return retval; |
|
} |
|
} |
|
|
|
while ((pbus = pci_find_next_bus(pbus))) |
|
pci_create_legacy_files(pbus); |
|
|
|
return 0; |
|
} |
|
late_initcall(pci_sysfs_init); |
|
|
|
static struct attribute *pci_dev_dev_attrs[] = { |
|
&dev_attr_boot_vga.attr, |
|
NULL, |
|
}; |
|
|
|
static umode_t pci_dev_attrs_are_visible(struct kobject *kobj, |
|
struct attribute *a, int n) |
|
{ |
|
struct device *dev = kobj_to_dev(kobj); |
|
struct pci_dev *pdev = to_pci_dev(dev); |
|
|
|
if (a == &dev_attr_boot_vga.attr) |
|
if ((pdev->class >> 8) != PCI_CLASS_DISPLAY_VGA) |
|
return 0; |
|
|
|
return a->mode; |
|
} |
|
|
|
static struct attribute *pci_dev_hp_attrs[] = { |
|
&dev_attr_remove.attr, |
|
&dev_attr_dev_rescan.attr, |
|
NULL, |
|
}; |
|
|
|
static umode_t pci_dev_hp_attrs_are_visible(struct kobject *kobj, |
|
struct attribute *a, int n) |
|
{ |
|
struct device *dev = kobj_to_dev(kobj); |
|
struct pci_dev *pdev = to_pci_dev(dev); |
|
|
|
if (pdev->is_virtfn) |
|
return 0; |
|
|
|
return a->mode; |
|
} |
|
|
|
static umode_t pci_bridge_attrs_are_visible(struct kobject *kobj, |
|
struct attribute *a, int n) |
|
{ |
|
struct device *dev = kobj_to_dev(kobj); |
|
struct pci_dev *pdev = to_pci_dev(dev); |
|
|
|
if (pci_is_bridge(pdev)) |
|
return a->mode; |
|
|
|
return 0; |
|
} |
|
|
|
static umode_t pcie_dev_attrs_are_visible(struct kobject *kobj, |
|
struct attribute *a, int n) |
|
{ |
|
struct device *dev = kobj_to_dev(kobj); |
|
struct pci_dev *pdev = to_pci_dev(dev); |
|
|
|
if (pci_is_pcie(pdev)) |
|
return a->mode; |
|
|
|
return 0; |
|
} |
|
|
|
static const struct attribute_group pci_dev_group = { |
|
.attrs = pci_dev_attrs, |
|
}; |
|
|
|
const struct attribute_group *pci_dev_groups[] = { |
|
&pci_dev_group, |
|
NULL, |
|
}; |
|
|
|
static const struct attribute_group pci_dev_hp_attr_group = { |
|
.attrs = pci_dev_hp_attrs, |
|
.is_visible = pci_dev_hp_attrs_are_visible, |
|
}; |
|
|
|
static const struct attribute_group pci_dev_attr_group = { |
|
.attrs = pci_dev_dev_attrs, |
|
.is_visible = pci_dev_attrs_are_visible, |
|
}; |
|
|
|
static const struct attribute_group pci_bridge_attr_group = { |
|
.attrs = pci_bridge_attrs, |
|
.is_visible = pci_bridge_attrs_are_visible, |
|
}; |
|
|
|
static const struct attribute_group pcie_dev_attr_group = { |
|
.attrs = pcie_dev_attrs, |
|
.is_visible = pcie_dev_attrs_are_visible, |
|
}; |
|
|
|
static const struct attribute_group *pci_dev_attr_groups[] = { |
|
&pci_dev_attr_group, |
|
&pci_dev_hp_attr_group, |
|
#ifdef CONFIG_PCI_IOV |
|
&sriov_dev_attr_group, |
|
#endif |
|
&pci_bridge_attr_group, |
|
&pcie_dev_attr_group, |
|
#ifdef CONFIG_PCIEAER |
|
&aer_stats_attr_group, |
|
#endif |
|
#ifdef CONFIG_PCIEASPM |
|
&aspm_ctrl_attr_group, |
|
#endif |
|
NULL, |
|
}; |
|
|
|
const struct device_type pci_dev_type = { |
|
.groups = pci_dev_attr_groups, |
|
};
|
|
|