mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 16:29:59 +00:00
![Rafael J. Wysocki](/assets/img/avatar_default.png)
There are multiple PCI device addition and removal code paths that may be run concurrently with the generic PCI bus rescan and device removal that can be triggered via sysfs. If that happens, it may lead to multiple different, potentially dangerous race conditions. The most straightforward way to address those problems is to run the code in question under the same lock that is used by the generic rescan/remove code in pci-sysfs.c. To prepare for those changes, move the definition of the global PCI remove/rescan lock to probe.c and provide global wrappers, pci_lock_rescan_remove() and pci_unlock_rescan_remove(), allowing drivers to manipulate that lock. Also provide pci_stop_and_remove_bus_device_locked() for the callers of pci_stop_and_remove_bus_device() who only need to hold the rescan/remove lock around it. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
1570 lines
38 KiB
C
1570 lines
38 KiB
C
/*
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* drivers/pci/pci-sysfs.c
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*
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* (C) Copyright 2002-2004 Greg Kroah-Hartman <greg@kroah.com>
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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 <jonsmirl@yahoo.com>
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* (C) Copyright 2004 Silicon Graphics, Inc. Jesse Barnes <jbarnes@sgi.com>
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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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#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/pci-aspm.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 "pci.h"
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static int sysfs_initialized; /* = 0 */
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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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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(class, "0x%06x\n");
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pci_config_attr(irq, "%u\n");
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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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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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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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return count;
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}
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static DEVICE_ATTR_RW(broken_parity_status);
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static ssize_t pci_dev_show_local_cpu(struct device *dev,
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int type,
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struct device_attribute *attr,
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char *buf)
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{
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const struct cpumask *mask;
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int len;
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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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len = type ?
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cpumask_scnprintf(buf, PAGE_SIZE-2, mask) :
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cpulist_scnprintf(buf, PAGE_SIZE-2, mask);
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buf[len++] = '\n';
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buf[len] = '\0';
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return len;
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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, 1, attr, buf);
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}
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static DEVICE_ATTR_RO(local_cpus);
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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, 0, attr, buf);
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}
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static DEVICE_ATTR_RO(local_cpulist);
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/*
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* PCI Bus Class Devices
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*/
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static ssize_t pci_bus_show_cpuaffinity(struct device *dev,
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int type,
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struct device_attribute *attr,
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char *buf)
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{
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int ret;
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const struct cpumask *cpumask;
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cpumask = cpumask_of_pcibus(to_pci_bus(dev));
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ret = type ?
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cpulist_scnprintf(buf, PAGE_SIZE-2, cpumask) :
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cpumask_scnprintf(buf, PAGE_SIZE-2, cpumask);
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buf[ret++] = '\n';
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buf[ret] = '\0';
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return ret;
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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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return pci_bus_show_cpuaffinity(dev, 0, attr, buf);
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}
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static DEVICE_ATTR_RO(cpuaffinity);
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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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return pci_bus_show_cpuaffinity(dev, 1, attr, buf);
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}
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static DEVICE_ATTR_RO(cpulistaffinity);
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/* show resources */
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static ssize_t
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resource_show(struct device * dev, 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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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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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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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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static ssize_t modalias_show(struct device *dev, 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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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 enabled_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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unsigned long val;
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ssize_t result = kstrtoul(buf, 0, &val);
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if (result < 0)
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return result;
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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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if (!val) {
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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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} else
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result = pci_enable_device(pdev);
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return result < 0 ? result : count;
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}
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static ssize_t enabled_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;
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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(enabled);
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#ifdef CONFIG_NUMA
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static ssize_t
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numa_node_show(struct device *dev, struct device_attribute *attr, 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_RO(numa_node);
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#endif
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static ssize_t
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dma_mask_bits_show(struct device *dev, 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
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consistent_dma_mask_bits_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", 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
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msi_bus_show(struct device *dev, 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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if (!pdev->subordinate)
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return 0;
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return sprintf (buf, "%u\n",
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!(pdev->subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI));
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}
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static ssize_t
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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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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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* Bad things may happen if the no_msi flag is changed
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* while drivers are loaded.
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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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* Maybe devices without subordinate buses shouldn't have this
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* attribute in the first place?
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*/
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if (!pdev->subordinate)
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return count;
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/* Is the flag going to change, or keep the value it already had? */
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if (!(pdev->subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI) ^
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!!val) {
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pdev->subordinate->bus_flags ^= PCI_BUS_FLAGS_NO_MSI;
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dev_warn(&pdev->dev, "forced subordinate bus to%s support MSI,"
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" bad things could happen\n", val ? "" : " not");
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}
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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 bus_rescan_store(struct bus_type *bus, 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_bus *b = NULL;
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if (kstrtoul(buf, 0, &val) < 0)
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return -EINVAL;
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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(rescan, (S_IWUSR|S_IWGRP), NULL, bus_rescan_store);
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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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static const struct attribute_group pci_bus_group = {
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.attrs = pci_bus_attrs,
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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
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dev_rescan_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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struct pci_dev *pdev = to_pci_dev(dev);
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if (kstrtoul(buf, 0, &val) < 0)
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return -EINVAL;
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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_rescan_attr = __ATTR(rescan,
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(S_IWUSR|S_IWGRP),
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NULL, dev_rescan_store);
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static void remove_callback(struct device *dev)
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{
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pci_stop_and_remove_bus_device_locked(to_pci_dev(dev));
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}
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static ssize_t
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remove_store(struct device *dev, struct device_attribute *dummy,
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const char *buf, size_t count)
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{
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int ret = 0;
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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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/* An attribute cannot be unregistered by one of its own methods,
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* so we have to use this roundabout approach.
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*/
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if (val)
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ret = device_schedule_callback(dev, remove_callback);
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if (ret)
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count = ret;
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return count;
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}
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static struct device_attribute dev_remove_attr = __ATTR(remove,
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(S_IWUSR|S_IWGRP),
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NULL, remove_store);
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static ssize_t
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dev_bus_rescan_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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struct pci_bus *bus = to_pci_bus(dev);
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if (kstrtoul(buf, 0, &val) < 0)
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return -EINVAL;
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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 DEVICE_ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_bus_rescan_store);
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#if defined(CONFIG_PM_RUNTIME) && 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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pm_runtime_resume(dev);
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|
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return count;
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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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|
|
#ifdef CONFIG_PCI_IOV
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static ssize_t sriov_totalvfs_show(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
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struct pci_dev *pdev = to_pci_dev(dev);
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|
|
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return sprintf(buf, "%u\n", pci_sriov_get_totalvfs(pdev));
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}
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|
|
|
|
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static ssize_t sriov_numvfs_show(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
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struct pci_dev *pdev = to_pci_dev(dev);
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|
|
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return sprintf(buf, "%u\n", pdev->sriov->num_VFs);
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|
}
|
|
|
|
/*
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|
* num_vfs > 0; number of VFs to enable
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|
* num_vfs = 0; disable all VFs
|
|
*
|
|
* Note: SRIOV spec doesn't allow partial VF
|
|
* disable, so it's all or none.
|
|
*/
|
|
static ssize_t sriov_numvfs_store(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
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|
struct pci_dev *pdev = to_pci_dev(dev);
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|
int ret;
|
|
u16 num_vfs;
|
|
|
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ret = kstrtou16(buf, 0, &num_vfs);
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|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (num_vfs > pci_sriov_get_totalvfs(pdev))
|
|
return -ERANGE;
|
|
|
|
if (num_vfs == pdev->sriov->num_VFs)
|
|
return count; /* no change */
|
|
|
|
/* is PF driver loaded w/callback */
|
|
if (!pdev->driver || !pdev->driver->sriov_configure) {
|
|
dev_info(&pdev->dev, "Driver doesn't support SRIOV configuration via sysfs\n");
|
|
return -ENOSYS;
|
|
}
|
|
|
|
if (num_vfs == 0) {
|
|
/* disable VFs */
|
|
ret = pdev->driver->sriov_configure(pdev, 0);
|
|
if (ret < 0)
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|
return ret;
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|
return count;
|
|
}
|
|
|
|
/* enable VFs */
|
|
if (pdev->sriov->num_VFs) {
|
|
dev_warn(&pdev->dev, "%d VFs already enabled. Disable before enabling %d VFs\n",
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pdev->sriov->num_VFs, num_vfs);
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return -EBUSY;
|
|
}
|
|
|
|
ret = pdev->driver->sriov_configure(pdev, num_vfs);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (ret != num_vfs)
|
|
dev_warn(&pdev->dev, "%d VFs requested; only %d enabled\n",
|
|
num_vfs, ret);
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|
|
|
return count;
|
|
}
|
|
|
|
static struct device_attribute sriov_totalvfs_attr = __ATTR_RO(sriov_totalvfs);
|
|
static struct device_attribute sriov_numvfs_attr =
|
|
__ATTR(sriov_numvfs, (S_IRUGO|S_IWUSR|S_IWGRP),
|
|
sriov_numvfs_show, sriov_numvfs_store);
|
|
#endif /* CONFIG_PCI_IOV */
|
|
|
|
static struct attribute *pci_dev_attrs[] = {
|
|
&dev_attr_resource.attr,
|
|
&dev_attr_vendor.attr,
|
|
&dev_attr_device.attr,
|
|
&dev_attr_subsystem_vendor.attr,
|
|
&dev_attr_subsystem_device.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_enabled.attr,
|
|
&dev_attr_broken_parity_status.attr,
|
|
&dev_attr_msi_bus.attr,
|
|
#if defined(CONFIG_PM_RUNTIME) && defined(CONFIG_ACPI)
|
|
&dev_attr_d3cold_allowed.attr,
|
|
#endif
|
|
NULL,
|
|
};
|
|
|
|
static const struct attribute_group pci_dev_group = {
|
|
.attrs = pci_dev_attrs,
|
|
};
|
|
|
|
const struct attribute_group *pci_dev_groups[] = {
|
|
&pci_dev_group,
|
|
NULL,
|
|
};
|
|
|
|
static struct attribute *pcibus_attrs[] = {
|
|
&dev_attr_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 struct device_attribute vga_attr = __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(container_of(kobj,struct device,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 (security_capable(filp->f_cred, &init_user_ns, CAP_SYS_ADMIN) == 0) {
|
|
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;
|
|
}
|
|
|
|
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(container_of(kobj,struct device,kobj));
|
|
unsigned int size = count;
|
|
loff_t init_off = off;
|
|
u8 *data = (u8*) buf;
|
|
|
|
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;
|
|
}
|
|
|
|
static ssize_t
|
|
read_vpd_attr(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(container_of(kobj, struct device, kobj));
|
|
|
|
if (off > bin_attr->size)
|
|
count = 0;
|
|
else if (count > bin_attr->size - off)
|
|
count = bin_attr->size - off;
|
|
|
|
return pci_read_vpd(dev, off, count, buf);
|
|
}
|
|
|
|
static ssize_t
|
|
write_vpd_attr(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(container_of(kobj, struct device, kobj));
|
|
|
|
if (off > bin_attr->size)
|
|
count = 0;
|
|
else if (count > bin_attr->size - off)
|
|
count = bin_attr->size - off;
|
|
|
|
return pci_write_vpd(dev, off, count, buf);
|
|
}
|
|
|
|
#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(container_of(kobj,
|
|
struct device,
|
|
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(container_of(kobj,
|
|
struct device,
|
|
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(container_of(kobj,
|
|
struct device,
|
|
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(container_of(kobj,
|
|
struct device,
|
|
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)
|
|
{
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
|
|
b->legacy_io = kzalloc(sizeof(struct bin_attribute) * 2,
|
|
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 = S_IRUSR | S_IWUSR;
|
|
b->legacy_io->read = pci_read_legacy_io;
|
|
b->legacy_io->write = pci_write_legacy_io;
|
|
b->legacy_io->mmap = pci_mmap_legacy_io;
|
|
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 = S_IRUSR | S_IWUSR;
|
|
b->legacy_mem->mmap = pci_mmap_legacy_mem;
|
|
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:
|
|
printk(KERN_WARNING "pci: warning: could not create legacy I/O port "
|
|
"and ISA memory resources to sysfs\n");
|
|
return;
|
|
}
|
|
|
|
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 */
|
|
|
|
#ifdef HAVE_PCI_MMAP
|
|
|
|
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, pci_start;
|
|
|
|
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;
|
|
pci_start = (mmap_api == PCI_MMAP_PROCFS) ?
|
|
pci_resource_start(pdev, resno) >> PAGE_SHIFT : 0;
|
|
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(container_of(kobj,
|
|
struct device, kobj));
|
|
struct resource *res = attr->private;
|
|
enum pci_mmap_state mmap_type;
|
|
resource_size_t start, end;
|
|
int i;
|
|
|
|
for (i = 0; i < PCI_ROM_RESOURCE; i++)
|
|
if (res == &pdev->resource[i])
|
|
break;
|
|
if (i >= PCI_ROM_RESOURCE)
|
|
return -ENODEV;
|
|
|
|
if (!pci_mmap_fits(pdev, i, vma, PCI_MMAP_SYSFS)) {
|
|
WARN(1, "process \"%s\" tried to map 0x%08lx bytes "
|
|
"at page 0x%08lx on %s BAR %d (start 0x%16Lx, size 0x%16Lx)\n",
|
|
current->comm, vma->vm_end-vma->vm_start, vma->vm_pgoff,
|
|
pci_name(pdev), i,
|
|
(u64)pci_resource_start(pdev, i),
|
|
(u64)pci_resource_len(pdev, i));
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* pci_mmap_page_range() expects the same kind of entry as coming
|
|
* from /proc/bus/pci/ which is a "user visible" value. If this is
|
|
* different from the resource itself, arch will do necessary fixup.
|
|
*/
|
|
pci_resource_to_user(pdev, i, res, &start, &end);
|
|
vma->vm_pgoff += start >> PAGE_SHIFT;
|
|
mmap_type = res->flags & IORESOURCE_MEM ? pci_mmap_mem : pci_mmap_io;
|
|
|
|
if (res->flags & IORESOURCE_MEM && iomem_is_exclusive(start))
|
|
return -EINVAL;
|
|
|
|
return pci_mmap_page_range(pdev, 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(container_of(kobj,
|
|
struct device, kobj));
|
|
struct resource *res = attr->private;
|
|
unsigned long port = off;
|
|
int i;
|
|
|
|
for (i = 0; i < PCI_ROM_RESOURCE; i++)
|
|
if (res == &pdev->resource[i])
|
|
break;
|
|
if (i >= PCI_ROM_RESOURCE)
|
|
return -ENODEV;
|
|
|
|
port += pci_resource_start(pdev, i);
|
|
|
|
if (port > pci_resource_end(pdev, i))
|
|
return 0;
|
|
|
|
if (port + count - 1 > pci_resource_end(pdev, i))
|
|
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)
|
|
{
|
|
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_ROM_RESOURCE; 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;
|
|
int retval;
|
|
|
|
res_attr = kzalloc(sizeof(*res_attr) + name_len, GFP_ATOMIC);
|
|
if (res_attr) {
|
|
char *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);
|
|
res_attr->mmap = pci_mmap_resource_uc;
|
|
}
|
|
if (pci_resource_flags(pdev, num) & IORESOURCE_IO) {
|
|
res_attr->read = pci_read_resource_io;
|
|
res_attr->write = pci_write_resource_io;
|
|
}
|
|
res_attr->attr.name = res_attr_name;
|
|
res_attr->attr.mode = S_IRUSR | S_IWUSR;
|
|
res_attr->size = pci_resource_len(pdev, num);
|
|
res_attr->private = &pdev->resource[num];
|
|
retval = sysfs_create_bin_file(&pdev->dev.kobj, res_attr);
|
|
} else
|
|
retval = -ENOMEM;
|
|
|
|
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_ROM_RESOURCE; 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 && 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 /* !HAVE_PCI_MMAP */
|
|
int __weak pci_create_resource_files(struct pci_dev *dev) { return 0; }
|
|
void __weak pci_remove_resource_files(struct pci_dev *dev) { return; }
|
|
#endif /* HAVE_PCI_MMAP */
|
|
|
|
/**
|
|
* 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(container_of(kobj, struct device, 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(container_of(kobj, struct device, 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 struct bin_attribute pci_config_attr = {
|
|
.attr = {
|
|
.name = "config",
|
|
.mode = S_IRUGO | S_IWUSR,
|
|
},
|
|
.size = PCI_CFG_SPACE_SIZE,
|
|
.read = pci_read_config,
|
|
.write = pci_write_config,
|
|
};
|
|
|
|
static struct bin_attribute pcie_config_attr = {
|
|
.attr = {
|
|
.name = "config",
|
|
.mode = S_IRUGO | S_IWUSR,
|
|
},
|
|
.size = PCI_CFG_SPACE_EXP_SIZE,
|
|
.read = pci_read_config,
|
|
.write = pci_write_config,
|
|
};
|
|
|
|
int __weak pcibios_add_platform_entries(struct pci_dev *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
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;
|
|
|
|
result = pci_reset_function(pdev);
|
|
if (result < 0)
|
|
return result;
|
|
|
|
return count;
|
|
}
|
|
|
|
static struct device_attribute reset_attr = __ATTR(reset, 0200, NULL, reset_store);
|
|
|
|
static int pci_create_capabilities_sysfs(struct pci_dev *dev)
|
|
{
|
|
int retval;
|
|
struct bin_attribute *attr;
|
|
|
|
/* If the device has VPD, try to expose it in sysfs. */
|
|
if (dev->vpd) {
|
|
attr = kzalloc(sizeof(*attr), GFP_ATOMIC);
|
|
if (!attr)
|
|
return -ENOMEM;
|
|
|
|
sysfs_bin_attr_init(attr);
|
|
attr->size = dev->vpd->len;
|
|
attr->attr.name = "vpd";
|
|
attr->attr.mode = S_IRUSR | S_IWUSR;
|
|
attr->read = read_vpd_attr;
|
|
attr->write = write_vpd_attr;
|
|
retval = sysfs_create_bin_file(&dev->dev.kobj, attr);
|
|
if (retval) {
|
|
kfree(attr);
|
|
return retval;
|
|
}
|
|
dev->vpd->attr = attr;
|
|
}
|
|
|
|
/* Active State Power Management */
|
|
pcie_aspm_create_sysfs_dev_files(dev);
|
|
|
|
if (!pci_probe_reset_function(dev)) {
|
|
retval = device_create_file(&dev->dev, &reset_attr);
|
|
if (retval)
|
|
goto error;
|
|
dev->reset_fn = 1;
|
|
}
|
|
return 0;
|
|
|
|
error:
|
|
pcie_aspm_remove_sysfs_dev_files(dev);
|
|
if (dev->vpd && dev->vpd->attr) {
|
|
sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr);
|
|
kfree(dev->vpd->attr);
|
|
}
|
|
|
|
return retval;
|
|
}
|
|
|
|
int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev)
|
|
{
|
|
int retval;
|
|
int rom_size = 0;
|
|
struct bin_attribute *attr;
|
|
|
|
if (!sysfs_initialized)
|
|
return -EACCES;
|
|
|
|
if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE)
|
|
retval = sysfs_create_bin_file(&pdev->dev.kobj, &pci_config_attr);
|
|
else
|
|
retval = sysfs_create_bin_file(&pdev->dev.kobj, &pcie_config_attr);
|
|
if (retval)
|
|
goto err;
|
|
|
|
retval = pci_create_resource_files(pdev);
|
|
if (retval)
|
|
goto err_config_file;
|
|
|
|
if (pci_resource_len(pdev, PCI_ROM_RESOURCE))
|
|
rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE);
|
|
else if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW)
|
|
rom_size = 0x20000;
|
|
|
|
/* If the device has a ROM, try to expose it in sysfs. */
|
|
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 = S_IRUSR | S_IWUSR;
|
|
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 platform-specific attributes */
|
|
retval = pcibios_add_platform_entries(pdev);
|
|
if (retval)
|
|
goto err_rom_file;
|
|
|
|
/* 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 (rom_size) {
|
|
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_EXP_SIZE)
|
|
sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr);
|
|
else
|
|
sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr);
|
|
err:
|
|
return retval;
|
|
}
|
|
|
|
static void pci_remove_capabilities_sysfs(struct pci_dev *dev)
|
|
{
|
|
if (dev->vpd && dev->vpd->attr) {
|
|
sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr);
|
|
kfree(dev->vpd->attr);
|
|
}
|
|
|
|
pcie_aspm_remove_sysfs_dev_files(dev);
|
|
if (dev->reset_fn) {
|
|
device_remove_file(&dev->dev, &reset_attr);
|
|
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)
|
|
{
|
|
int rom_size = 0;
|
|
|
|
if (!sysfs_initialized)
|
|
return;
|
|
|
|
pci_remove_capabilities_sysfs(pdev);
|
|
|
|
if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE)
|
|
sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr);
|
|
else
|
|
sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr);
|
|
|
|
pci_remove_resource_files(pdev);
|
|
|
|
if (pci_resource_len(pdev, PCI_ROM_RESOURCE))
|
|
rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE);
|
|
else if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW)
|
|
rom_size = 0x20000;
|
|
|
|
if (rom_size && pdev->rom_attr) {
|
|
sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr);
|
|
kfree(pdev->rom_attr);
|
|
}
|
|
|
|
pci_remove_firmware_label_files(pdev);
|
|
|
|
}
|
|
|
|
static int __init pci_sysfs_init(void)
|
|
{
|
|
struct pci_dev *pdev = 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;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
late_initcall(pci_sysfs_init);
|
|
|
|
static struct attribute *pci_dev_dev_attrs[] = {
|
|
&vga_attr.attr,
|
|
NULL,
|
|
};
|
|
|
|
static umode_t pci_dev_attrs_are_visible(struct kobject *kobj,
|
|
struct attribute *a, int n)
|
|
{
|
|
struct device *dev = container_of(kobj, struct device, kobj);
|
|
struct pci_dev *pdev = to_pci_dev(dev);
|
|
|
|
if (a == &vga_attr.attr)
|
|
if ((pdev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
|
|
return 0;
|
|
|
|
return a->mode;
|
|
}
|
|
|
|
static struct attribute *pci_dev_hp_attrs[] = {
|
|
&dev_remove_attr.attr,
|
|
&dev_rescan_attr.attr,
|
|
NULL,
|
|
};
|
|
|
|
static umode_t pci_dev_hp_attrs_are_visible(struct kobject *kobj,
|
|
struct attribute *a, int n)
|
|
{
|
|
struct device *dev = container_of(kobj, struct device, kobj);
|
|
struct pci_dev *pdev = to_pci_dev(dev);
|
|
|
|
if (pdev->is_virtfn)
|
|
return 0;
|
|
|
|
return a->mode;
|
|
}
|
|
|
|
static struct attribute_group pci_dev_hp_attr_group = {
|
|
.attrs = pci_dev_hp_attrs,
|
|
.is_visible = pci_dev_hp_attrs_are_visible,
|
|
};
|
|
|
|
#ifdef CONFIG_PCI_IOV
|
|
static struct attribute *sriov_dev_attrs[] = {
|
|
&sriov_totalvfs_attr.attr,
|
|
&sriov_numvfs_attr.attr,
|
|
NULL,
|
|
};
|
|
|
|
static umode_t sriov_attrs_are_visible(struct kobject *kobj,
|
|
struct attribute *a, int n)
|
|
{
|
|
struct device *dev = container_of(kobj, struct device, kobj);
|
|
|
|
if (!dev_is_pf(dev))
|
|
return 0;
|
|
|
|
return a->mode;
|
|
}
|
|
|
|
static struct attribute_group sriov_dev_attr_group = {
|
|
.attrs = sriov_dev_attrs,
|
|
.is_visible = sriov_attrs_are_visible,
|
|
};
|
|
#endif /* CONFIG_PCI_IOV */
|
|
|
|
static 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_dev_attr_groups[] = {
|
|
&pci_dev_attr_group,
|
|
&pci_dev_hp_attr_group,
|
|
#ifdef CONFIG_PCI_IOV
|
|
&sriov_dev_attr_group,
|
|
#endif
|
|
NULL,
|
|
};
|
|
|
|
struct device_type pci_dev_type = {
|
|
.groups = pci_dev_attr_groups,
|
|
};
|