![Bjorn Helgaas](/assets/img/avatar_default.png)
* pci/jiang-iov-fixes: PCI: Hide remove and rescan sysfs interfaces for SR-IOV virtual functions PCI: Finish SR-IOV VF setup before adding the device
1532 lines
38 KiB
C
1532 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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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 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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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 = cpumask_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_cpulist_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 *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 = 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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/*
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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 inline ssize_t pci_bus_show_cpumaskaffinity(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 pci_bus_show_cpuaffinity(dev, 0, attr, buf);
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}
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static inline ssize_t pci_bus_show_cpulistaffinity(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 pci_bus_show_cpuaffinity(dev, 1, attr, buf);
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}
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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 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 ssize_t is_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 is_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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#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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#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 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 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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/* bad things may happen if the no_msi flag is changed
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* while some drivers are loaded */
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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/* Maybe pci devices without subordinate busses shouldn't even have this
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* attribute in the first place? */
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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 DEFINE_MUTEX(pci_remove_rescan_mutex);
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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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mutex_lock(&pci_remove_rescan_mutex);
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while ((b = pci_find_next_bus(b)) != NULL)
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pci_rescan_bus(b);
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mutex_unlock(&pci_remove_rescan_mutex);
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}
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return count;
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}
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struct bus_attribute pci_bus_attrs[] = {
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__ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, bus_rescan_store),
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__ATTR_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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mutex_lock(&pci_remove_rescan_mutex);
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pci_rescan_bus(pdev->bus);
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mutex_unlock(&pci_remove_rescan_mutex);
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}
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return count;
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}
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struct device_attribute dev_rescan_attr = __ATTR(rescan, (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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struct pci_dev *pdev = to_pci_dev(dev);
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mutex_lock(&pci_remove_rescan_mutex);
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pci_stop_and_remove_bus_device(pdev);
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mutex_unlock(&pci_remove_rescan_mutex);
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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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struct device_attribute dev_remove_attr = __ATTR(remove, (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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mutex_lock(&pci_remove_rescan_mutex);
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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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mutex_unlock(&pci_remove_rescan_mutex);
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}
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return count;
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}
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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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if (kstrtoul(buf, 0, &val) < 0)
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return -EINVAL;
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pdev->d3cold_allowed = !!val;
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pm_runtime_resume(dev);
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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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#endif
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#ifdef CONFIG_PCI_IOV
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static ssize_t sriov_totalvfs_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", pci_sriov_get_totalvfs(pdev));
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}
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static ssize_t sriov_numvfs_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->sriov->num_VFs);
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}
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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
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*
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* Note: SRIOV spec doesn't allow partial VF
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* disable, so it's all or none.
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*/
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static ssize_t sriov_numvfs_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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int ret;
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u16 num_vfs;
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ret = kstrtou16(buf, 0, &num_vfs);
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if (ret < 0)
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return ret;
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if (num_vfs > pci_sriov_get_totalvfs(pdev))
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return -ERANGE;
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if (num_vfs == pdev->sriov->num_VFs)
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return count; /* no change */
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/* is PF driver loaded w/callback */
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if (!pdev->driver || !pdev->driver->sriov_configure) {
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dev_info(&pdev->dev, "Driver doesn't support SRIOV configuration via sysfs\n");
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return -ENOSYS;
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}
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if (num_vfs == 0) {
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/* disable VFs */
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ret = pdev->driver->sriov_configure(pdev, 0);
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if (ret < 0)
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return ret;
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return count;
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}
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/* enable VFs */
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if (pdev->sriov->num_VFs) {
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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;
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}
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ret = pdev->driver->sriov_configure(pdev, num_vfs);
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if (ret < 0)
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return ret;
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if (ret != num_vfs)
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dev_warn(&pdev->dev, "%d VFs requested; only %d enabled\n",
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num_vfs, ret);
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return count;
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}
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static struct device_attribute sriov_totalvfs_attr = __ATTR_RO(sriov_totalvfs);
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static struct device_attribute sriov_numvfs_attr =
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__ATTR(sriov_numvfs, (S_IRUGO|S_IWUSR|S_IWGRP),
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sriov_numvfs_show, sriov_numvfs_store);
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#endif /* CONFIG_PCI_IOV */
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|
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struct device_attribute pci_dev_attrs[] = {
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__ATTR_RO(resource),
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__ATTR_RO(vendor),
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__ATTR_RO(device),
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__ATTR_RO(subsystem_vendor),
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__ATTR_RO(subsystem_device),
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__ATTR_RO(class),
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__ATTR_RO(irq),
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__ATTR_RO(local_cpus),
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__ATTR_RO(local_cpulist),
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__ATTR_RO(modalias),
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#ifdef CONFIG_NUMA
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__ATTR_RO(numa_node),
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#endif
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__ATTR_RO(dma_mask_bits),
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__ATTR_RO(consistent_dma_mask_bits),
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__ATTR(enable, 0600, is_enabled_show, is_enabled_store),
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__ATTR(broken_parity_status,(S_IRUGO|S_IWUSR),
|
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broken_parity_status_show,broken_parity_status_store),
|
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__ATTR(msi_bus, 0644, msi_bus_show, msi_bus_store),
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#if defined(CONFIG_PM_RUNTIME) && defined(CONFIG_ACPI)
|
|
__ATTR(d3cold_allowed, 0644, d3cold_allowed_show, d3cold_allowed_store),
|
|
#endif
|
|
__ATTR_NULL,
|
|
};
|
|
|
|
struct device_attribute pcibus_dev_attrs[] = {
|
|
__ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_bus_rescan_store),
|
|
__ATTR(cpuaffinity, S_IRUGO, pci_bus_show_cpumaskaffinity, NULL),
|
|
__ATTR(cpulistaffinity, S_IRUGO, pci_bus_show_cpulistaffinity, NULL),
|
|
__ATTR_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));
|
|
}
|
|
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,
|
|
};
|