Release 4.14 drivers/pci/pci-sysfs.c

Directory: drivers/pci
// SPDX-License-Identifier: GPL-2.0
/*
 * drivers/pci/pci-sysfs.c
 *
 * (C) Copyright 2002-2004 Greg Kroah-Hartman <greg@kroah.com>
 * (C) Copyright 2002-2004 IBM Corp.
 * (C) Copyright 2003 Matthew Wilcox
 * (C) Copyright 2003 Hewlett-Packard
 * (C) Copyright 2004 Jon Smirl <jonsmirl@yahoo.com>
 * (C) Copyright 2004 Silicon Graphics, Inc. Jesse Barnes <jbarnes@sgi.com>
 *
 * File attributes for PCI devices
 *
 * Modeled after usb's driverfs.c
 *
 */


#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/pci.h>
#include <linux/stat.h>
#include <linux/export.h>
#include <linux/topology.h>
#include <linux/mm.h>
#include <linux/fs.h>
#include <linux/capability.h>
#include <linux/security.h>
#include <linux/pci-aspm.h>
#include <linux/slab.h>
#include <linux/vgaarb.h>
#include <linux/pm_runtime.h>
#include <linux/of.h>
#include "pci.h"


static int sysfs_initialized;	
/* = 0 */

/* show configuration fields */

#define pci_config_attr(field, format_string)				\
static ssize_t                                                          \
field##_show(struct device *dev, struct device_attribute *attr, char *buf)                              \
{                                                                       \
        struct pci_dev *pdev;                                           \
                                                                        \
        pdev = to_pci_dev(dev);                                         \
        return sprintf(buf, format_string, pdev->field);                \
}                                                                       \
static DEVICE_ATTR_RO(field)

pci_config_attr(vendor, "0x%04x\n");
pci_config_attr(device, "0x%04x\n");
pci_config_attr(subsystem_vendor, "0x%04x\n");
pci_config_attr(subsystem_device, "0x%04x\n");
pci_config_attr(revision, "0x%02x\n");
pci_config_attr(class, "0x%06x\n");
pci_config_attr(irq, "%u\n");



static ssize_t broken_parity_status_show(struct device *dev,
					 struct device_attribute *attr,
					 char *buf)
{
	struct pci_dev *pdev = to_pci_dev(dev);
	return sprintf(buf, "%u\n", pdev->broken_parity_status);
}

Contributors
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Doug Thompson 42 100.00% 1 100.00%
Total 42 100.00% 1 100.00%



static ssize_t broken_parity_status_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;

	if (kstrtoul(buf, 0, &val) < 0)
		return -EINVAL;

	pdev->broken_parity_status = !!val;

	return count;
}
Contributors
Person Tokens Prop Commits CommitProp
Doug Thompson 46 68.66% 1 33.33%
Trent Piepho 20 29.85% 1 33.33%
Jingoo Han 1 1.49% 1 33.33%
Total 67 100.00% 3 100.00%

static DEVICE_ATTR_RW(broken_parity_status);



static ssize_t pci_dev_show_local_cpu(struct device *dev, bool list,
				      struct device_attribute *attr, char *buf)
{
	const struct cpumask *mask;

#ifdef CONFIG_NUMA
	mask = (dev_to_node(dev) == -1) ? cpu_online_mask :
					  cpumask_of_node(dev_to_node(dev));
#else
	mask = cpumask_of_pcibus(to_pci_dev(dev)->bus);
#endif
	return cpumap_print_to_pagebuf(list, buf, mask);
}

Contributors
Person Tokens Prop Commits CommitProp
Andi Kleen 20 25.00% 1 10.00%
Andreas Herrmann 17 21.25% 1 10.00%
David John 12 15.00% 1 10.00%
Mike Travis 7 8.75% 2 20.00%
Yijing Wang 6 7.50% 1 10.00%
Sudeep Holla 5 6.25% 1 10.00%
Yani Ioannou 5 6.25% 1 10.00%
Alan Cox 4 5.00% 1 10.00%
Greg Kroah-Hartman 4 5.00% 1 10.00%
Total 80 100.00% 10 100.00%



static ssize_t local_cpus_show(struct device *dev,
			       struct device_attribute *attr, char *buf)
{
	return pci_dev_show_local_cpu(dev, false, attr, buf);
}
Contributors
Person Tokens Prop Commits CommitProp
Mike Travis 18 56.25% 1 20.00%
Yijing Wang 10 31.25% 1 20.00%
David John 2 6.25% 1 20.00%
Andreas Herrmann 1 3.12% 1 20.00%
Sudeep Holla 1 3.12% 1 20.00%
Total 32 100.00% 5 100.00%

static DEVICE_ATTR_RO(local_cpus);



static ssize_t local_cpulist_show(struct device *dev,
				  struct device_attribute *attr, char *buf)
{
	return pci_dev_show_local_cpu(dev, true, attr, buf);
}
Contributors
Person Tokens Prop Commits CommitProp
Mike Travis 23 71.88% 1 25.00%
Yijing Wang 5 15.62% 1 25.00%
Andi Kleen 3 9.38% 1 25.00%
Sudeep Holla 1 3.12% 1 25.00%
Total 32 100.00% 4 100.00%

static DEVICE_ATTR_RO(local_cpulist);

/*
 * PCI Bus Class Devices
 */


static ssize_t cpuaffinity_show(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	const struct cpumask *cpumask = cpumask_of_pcibus(to_pci_bus(dev));

	return cpumap_print_to_pagebuf(false, buf, cpumask);
}
Contributors
Person Tokens Prop Commits CommitProp
Yinghai Lu 38 86.36% 1 50.00%
Sudeep Holla 6 13.64% 1 50.00%
Total 44 100.00% 2 100.00%

static DEVICE_ATTR_RO(cpuaffinity);



static ssize_t cpulistaffinity_show(struct device *dev,
				    struct device_attribute *attr, char *buf)
{
	const struct cpumask *cpumask = cpumask_of_pcibus(to_pci_bus(dev));

	return cpumap_print_to_pagebuf(true, buf, cpumask);
}
Contributors
Person Tokens Prop Commits CommitProp
Yinghai Lu 25 56.82% 1 33.33%
Sudeep Holla 18 40.91% 1 33.33%
Greg Kroah-Hartman 1 2.27% 1 33.33%
Total 44 100.00% 3 100.00%

static DEVICE_ATTR_RO(cpulistaffinity);

/* show resources */


static ssize_t resource_show(struct device *dev, struct device_attribute *attr,
			     char *buf)
{
	struct pci_dev *pci_dev = to_pci_dev(dev);
	char *str = buf;
	int i;
	int max;
	resource_size_t start, end;

	if (pci_dev->subordinate)
		max = DEVICE_COUNT_RESOURCE;
	else
		max = PCI_BRIDGE_RESOURCES;

	for (i = 0; i < max; i++) {
		struct resource *res =  &pci_dev->resource[i];
		pci_resource_to_user(pci_dev, i, res, &start, &end);
		str += sprintf(str, "0x%016llx 0x%016llx 0x%016llx\n",
			       (unsigned long long)start,
			       (unsigned long long)end,
			       (unsigned long long)res->flags);
	}
	return (str - buf);
}
Contributors
Person Tokens Prop Commits CommitProp
Daniel Stekloff 58 40.28% 1 14.29%
Michael Ellerman 53 36.81% 1 14.29%
Matthew Wilcox 21 14.58% 1 14.29%
Yu Zhao 5 3.47% 1 14.29%
Yani Ioannou 5 3.47% 1 14.29%
Greg Kroah-Hartman 2 1.39% 2 28.57%
Total 144 100.00% 7 100.00%

static DEVICE_ATTR_RO(resource);



static ssize_t max_link_speed_show(struct device *dev,
				   struct device_attribute *attr, char *buf)
{
	struct pci_dev *pci_dev = to_pci_dev(dev);
	u32 linkcap;
	int err;
	const char *speed;

	err = pcie_capability_read_dword(pci_dev, PCI_EXP_LNKCAP, &linkcap);
	if (err)
		return -EINVAL;

	switch (linkcap & PCI_EXP_LNKCAP_SLS) {
	case PCI_EXP_LNKCAP_SLS_8_0GB:
		speed = "8 GT/s";
		break;
	case PCI_EXP_LNKCAP_SLS_5_0GB:
		speed = "5 GT/s";
		break;
	case PCI_EXP_LNKCAP_SLS_2_5GB:
		speed = "2.5 GT/s";
		break;
	default:
		speed = "Unknown speed";
	}

	return sprintf(buf, "%s\n", speed);
}
Contributors
Person Tokens Prop Commits CommitProp
Wong Vee Khee 108 100.00% 1 100.00%
Total 108 100.00% 1 100.00%

static DEVICE_ATTR_RO(max_link_speed);



static ssize_t max_link_width_show(struct device *dev,
				   struct device_attribute *attr, char *buf)
{
	struct pci_dev *pci_dev = to_pci_dev(dev);
	u32 linkcap;
	int err;

	err = pcie_capability_read_dword(pci_dev, PCI_EXP_LNKCAP, &linkcap);
	if (err)
		return -EINVAL;

	return sprintf(buf, "%u\n", (linkcap & PCI_EXP_LNKCAP_MLW) >> 4);
}
Contributors
Person Tokens Prop Commits CommitProp
Wong Vee Khee 72 100.00% 1 100.00%
Total 72 100.00% 1 100.00%

static DEVICE_ATTR_RO(max_link_width);



static ssize_t current_link_speed_show(struct device *dev,
				       struct device_attribute *attr, char *buf)
{
	struct pci_dev *pci_dev = to_pci_dev(dev);
	u16 linkstat;
	int err;
	const char *speed;

	err = pcie_capability_read_word(pci_dev, PCI_EXP_LNKSTA, &linkstat);
	if (err)
		return -EINVAL;

	switch (linkstat & PCI_EXP_LNKSTA_CLS) {
	case PCI_EXP_LNKSTA_CLS_8_0GB:
		speed = "8 GT/s";
		break;
	case PCI_EXP_LNKSTA_CLS_5_0GB:
		speed = "5 GT/s";
		break;
	case PCI_EXP_LNKSTA_CLS_2_5GB:
		speed = "2.5 GT/s";
		break;
	default:
		speed = "Unknown speed";
	}

	return sprintf(buf, "%s\n", speed);
}
Contributors
Person Tokens Prop Commits CommitProp
Wong Vee Khee 108 100.00% 1 100.00%
Total 108 100.00% 1 100.00%

static DEVICE_ATTR_RO(current_link_speed);



static ssize_t current_link_width_show(struct device *dev,
				       struct device_attribute *attr, char *buf)
{
	struct pci_dev *pci_dev = to_pci_dev(dev);
	u16 linkstat;
	int err;

	err = pcie_capability_read_word(pci_dev, PCI_EXP_LNKSTA, &linkstat);
	if (err)
		return -EINVAL;

	return sprintf(buf, "%u\n",
		(linkstat & PCI_EXP_LNKSTA_NLW) >> PCI_EXP_LNKSTA_NLW_SHIFT);
}
Contributors
Person Tokens Prop Commits CommitProp
Wong Vee Khee 72 100.00% 1 100.00%
Total 72 100.00% 1 100.00%

static DEVICE_ATTR_RO(current_link_width);



static ssize_t secondary_bus_number_show(struct device *dev,
					 struct device_attribute *attr,
					 char *buf)
{
	struct pci_dev *pci_dev = to_pci_dev(dev);
	u8 sec_bus;
	int err;

	err = pci_read_config_byte(pci_dev, PCI_SECONDARY_BUS, &sec_bus);
	if (err)
		return -EINVAL;

	return sprintf(buf, "%u\n", sec_bus);
}
Contributors
Person Tokens Prop Commits CommitProp
Wong Vee Khee 66 100.00% 1 100.00%
Total 66 100.00% 1 100.00%

static DEVICE_ATTR_RO(secondary_bus_number);



static ssize_t subordinate_bus_number_show(struct device *dev,
					   struct device_attribute *attr,
					   char *buf)
{
	struct pci_dev *pci_dev = to_pci_dev(dev);
	u8 sub_bus;
	int err;

	err = pci_read_config_byte(pci_dev, PCI_SUBORDINATE_BUS, &sub_bus);
	if (err)
		return -EINVAL;

	return sprintf(buf, "%u\n", sub_bus);
}
Contributors
Person Tokens Prop Commits CommitProp
Wong Vee Khee 66 100.00% 1 100.00%
Total 66 100.00% 1 100.00%

static DEVICE_ATTR_RO(subordinate_bus_number);



static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
			     char *buf)
{
	struct pci_dev *pci_dev = to_pci_dev(dev);

	return sprintf(buf, "pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02X\n",
		       pci_dev->vendor, pci_dev->device,
		       pci_dev->subsystem_vendor, pci_dev->subsystem_device,
		       (u8)(pci_dev->class >> 16), (u8)(pci_dev->class >> 8),
		       (u8)(pci_dev->class));
}
Contributors
Person Tokens Prop Commits CommitProp
Greg Kroah-Hartman 84 98.82% 2 66.67%
Ricardo Ribalda Delgado 1 1.18% 1 33.33%
Total 85 100.00% 3 100.00%

static DEVICE_ATTR_RO(modalias);



static ssize_t enable_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;

	/* this can crash the machine when done on the "wrong" device */
	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;

	if (!val) {
		if (pci_is_enabled(pdev))
			pci_disable_device(pdev);
		else
			result = -EIO;
	} else
		result = pci_enable_device(pdev);

	return result < 0 ? result : count;
}

Contributors
Person Tokens Prop Commits CommitProp
Arjan van de Ven 56 48.70% 1 14.29%
Trent Piepho 30 26.09% 1 14.29%
Iñaky Pérez-González 23 20.00% 1 14.29%
Greg Kroah-Hartman 4 3.48% 2 28.57%
Jingoo Han 1 0.87% 1 14.29%
Yuji Shimada 1 0.87% 1 14.29%
Total 115 100.00% 7 100.00%



static ssize_t enable_show(struct device *dev, struct device_attribute *attr,
			    char *buf)
{
	struct pci_dev *pdev;

	pdev = to_pci_dev(dev);
	return sprintf(buf, "%u\n", atomic_read(&pdev->enable_cnt));
}
Contributors
Person Tokens Prop Commits CommitProp
Iñaky Pérez-González 44 91.67% 1 33.33%
Arjan van de Ven 3 6.25% 1 33.33%
Greg Kroah-Hartman 1 2.08% 1 33.33%
Total 48 100.00% 3 100.00%

static DEVICE_ATTR_RW(enable);

#ifdef CONFIG_NUMA


static ssize_t numa_node_store(struct device *dev,
			       struct device_attribute *attr, const char *buf,
			       size_t count)
{
	struct pci_dev *pdev = to_pci_dev(dev);
	int node, ret;

	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;

	ret = kstrtoint(buf, 0, &node);
	if (ret)
		return ret;

	if ((node < 0 && node != NUMA_NO_NODE) || node >= MAX_NUMNODES)
		return -EINVAL;

	if (node != NUMA_NO_NODE && !node_online(node))
		return -EINVAL;

	add_taint(TAINT_FIRMWARE_WORKAROUND, LOCKDEP_STILL_OK);
	dev_alert(&pdev->dev, FW_BUG "Overriding NUMA node to %d.  Contact your vendor for updates.",
		  node);

	dev->numa_node = node;
	return count;
}

Contributors
Person Tokens Prop Commits CommitProp
Prarit Bhargava 111 82.22% 1 33.33%
Mathias Krause 21 15.56% 1 33.33%
Sasha Levin 3 2.22% 1 33.33%
Total 135 100.00% 3 100.00%



static ssize_t numa_node_show(struct device *dev, struct device_attribute *attr,
			      char *buf)
{
	return sprintf(buf, "%d\n", dev->numa_node);
}
Contributors
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Brice Goglin 32 100.00% 1 100.00%
Total 32 100.00% 1 100.00%

static DEVICE_ATTR_RW(numa_node);
#endif



static ssize_t dma_mask_bits_show(struct device *dev,
				  struct device_attribute *attr, char *buf)
{
	struct pci_dev *pdev = to_pci_dev(dev);

	return sprintf(buf, "%d\n", fls64(pdev->dma_mask));
}
Contributors
Person Tokens Prop Commits CommitProp
Yinghai Lu 43 95.56% 1 50.00%
Brice Goglin 2 4.44% 1 50.00%
Total 45 100.00% 2 100.00%

static DEVICE_ATTR_RO(dma_mask_bits);



static ssize_t consistent_dma_mask_bits_show(struct device *dev,
					     struct device_attribute *attr,
					     char *buf)
{
	return sprintf(buf, "%d\n", fls64(dev->coherent_dma_mask));
}
Contributors
Person Tokens Prop Commits CommitProp
Yinghai Lu 35 100.00% 1 100.00%
Total 35 100.00% 1 100.00%

static DEVICE_ATTR_RO(consistent_dma_mask_bits);



static ssize_t msi_bus_show(struct device *dev, struct device_attribute *attr,
			    char *buf)
{
	struct pci_dev *pdev = to_pci_dev(dev);
	struct pci_bus *subordinate = pdev->subordinate;

	return sprintf(buf, "%u\n", subordinate ?
		       !(subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI)
			   : !pdev->no_msi);
}

Contributors
Person Tokens Prop Commits CommitProp
Brice Goglin 48 76.19% 1 33.33%
Yijing Wang 13 20.63% 1 33.33%
Yinghai Lu 2 3.17% 1 33.33%
Total 63 100.00% 3 100.00%



static ssize_t msi_bus_store(struct device *dev, struct device_attribute *attr,
			     const char *buf, size_t count)
{
	struct pci_dev *pdev = to_pci_dev(dev);
	struct pci_bus *subordinate = pdev->subordinate;
	unsigned long val;

	if (kstrtoul(buf, 0, &val) < 0)
		return -EINVAL;

	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;

	/*
         * "no_msi" and "bus_flags" only affect what happens when a driver
         * requests MSI or MSI-X.  They don't affect any drivers that have
         * already requested MSI or MSI-X.
         */
	if (!subordinate) {
		pdev->no_msi = !val;
		dev_info(&pdev->dev, "MSI/MSI-X %s for future drivers\n",
			 val ? "allowed" : "disallowed");
		return count;
	}

	if (val)
		subordinate->bus_flags &= ~PCI_BUS_FLAGS_NO_MSI;
	else
		subordinate->bus_flags |= PCI_BUS_FLAGS_NO_MSI;

	dev_info(&subordinate->dev, "MSI/MSI-X %s for future drivers of devices on this bus\n",
		 val ? "allowed" : "disallowed");
	return count;
}
Contributors
Person Tokens Prop Commits CommitProp
Brice Goglin 72 48.65% 1 25.00%
Yijing Wang 47 31.76% 1 25.00%
Trent Piepho 28 18.92% 1 25.00%
Jingoo Han 1 0.68% 1 25.00%
Total 148 100.00% 4 100.00%

static DEVICE_ATTR_RW(msi_bus);



static ssize_t bus_rescan_store(struct bus_type *bus, const char *buf,
				size_t count)
{
	unsigned long val;
	struct pci_bus *b = NULL;

	if (kstrtoul(buf, 0, &val) < 0)
		return -EINVAL;

	if (val) {
		pci_lock_rescan_remove();
		while ((b = pci_find_next_bus(b)) != NULL)
			pci_rescan_bus(b);
		pci_unlock_rescan_remove();
	}
	return count;
}
Contributors
Person Tokens Prop Commits CommitProp
Alexander Chiang 76 93.83% 1 33.33%
Rafael J. Wysocki 4 4.94% 1 33.33%
Jingoo Han 1 1.23% 1 33.33%
Total 81 100.00% 3 100.00%

static BUS_ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, bus_rescan_store);


static struct attribute *pci_bus_attrs[] = {
	&bus_attr_rescan.attr,
	NULL,
};


static const struct attribute_group pci_bus_group = {
	.attrs = pci_bus_attrs,
};


const struct attribute_group *pci_bus_groups[] = {
	&pci_bus_group,
	NULL,
};



static ssize_t dev_rescan_store(struct device *dev,
				struct device_attribute *attr, const char *buf,
				size_t count)
{
	unsigned long val;
	struct pci_dev *pdev = to_pci_dev(dev);

	if (kstrtoul(buf, 0, &val) < 0)
		return -EINVAL;

	if (val) {
		pci_lock_rescan_remove();
		pci_rescan_bus(pdev->bus);
		pci_unlock_rescan_remove();
	}
	return count;
}
Contributors
Person Tokens Prop Commits CommitProp
Alexander Chiang 73 93.59% 1 33.33%
Rafael J. Wysocki 4 5.13% 1 33.33%
Jingoo Han 1 1.28% 1 33.33%
Total 78 100.00% 3 100.00%


static struct device_attribute dev_rescan_attr = __ATTR(rescan,
							(S_IWUSR|S_IWGRP),
							NULL, dev_rescan_store);



static ssize_t remove_store(struct device *dev, struct device_attribute *attr,
			    const char *buf, size_t count)
{
	unsigned long val;

	if (kstrtoul(buf, 0, &val) < 0)
		return -EINVAL;

	if (val && device_remove_file_self(dev, attr))
		pci_stop_and_remove_bus_device_locked(to_pci_dev(dev));
	return count;
}
Contributors
Person Tokens Prop Commits CommitProp
Alexander Chiang 56 82.35% 1 33.33%
Tejun Heo 11 16.18% 1 33.33%
Jingoo Han 1 1.47% 1 33.33%
Total 68 100.00% 3 100.00%


static struct device_attribute dev_remove_attr = __ATTR(remove,
							(S_IWUSR|S_IWGRP),
							NULL, remove_store);



static ssize_t dev_bus_rescan_store(struct device *dev,
				    struct device_attribute *attr,
				    const char *buf, size_t count)
{
	unsigned long val;
	struct pci_bus *bus = to_pci_bus(dev);

	if (kstrtoul(buf, 0, &val) < 0)
		return -EINVAL;

	if (val) {
		pci_lock_rescan_remove();
		if (!pci_is_root_bus(bus) && list_empty(&bus->devices))
			pci_rescan_bus_bridge_resize(bus->self);
		else
			pci_rescan_bus(bus);
		pci_unlock_rescan_remove();
	}
	return count;
}
Contributors
Person Tokens Prop Commits CommitProp
Yinghai Lu 95 95.00% 2 50.00%
Rafael J. Wysocki 4 4.00% 1 25.00%
Jingoo Han 1 1.00% 1 25.00%
Total 100 100.00% 4 100.00%

static DEVICE_ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_bus_rescan_store);

#if defined(CONFIG_PM) && defined(CONFIG_ACPI)


static ssize_t d3cold_allowed_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;

	if (kstrtoul(buf, 0, &val) < 0)
		return -EINVAL;

	pdev->d3cold_allowed = !!val;
	if (pdev->d3cold_allowed)
		pci_d3cold_enable(pdev);
	else
		pci_d3cold_disable(pdev);

	pm_runtime_resume(dev);

	return count;
}

Contributors
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Huang Ying 71 79.78% 1 33.33%
Mika Westerberg 17 19.10% 1 33.33%
Jingoo Han 1 1.12% 1 33.33%
Total 89 100.00% 3 100.00%



static ssize_t d3cold_allowed_show(struct device *dev,
				   struct device_attribute *attr, char *buf)
{
	struct pci_dev *pdev = to_pci_dev(dev);
	return sprintf(buf, "%u\n", pdev->d3cold_allowed);
}
Contributors
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Huang Ying 42 100.00% 1 100.00%
Total 42 100.00% 1 100.00%

static DEVICE_ATTR_RW(d3cold_allowed);
#endif

#ifdef CONFIG_OF


static ssize_t devspec_show(struct device *dev,
			    struct device_attribute *attr, char *buf)
{
	struct pci_dev *pdev = to_pci_dev(dev);
	struct device_node *np = pci_device_to_OF_node(pdev);

	if (np == NULL)
		return 0;
	return sprintf(buf, "%pOF", np);
}
Contributors
Person Tokens Prop Commits CommitProp
Sebastian Ott 58 98.31% 1 50.00%
Rob Herring 1 1.69% 1 50.00%
Total 59 100.00% 2 100.00%

static DEVICE_ATTR_RO(devspec);
#endif

#ifdef CONFIG_PCI_IOV


static ssize_t sriov_totalvfs_show(struct device *dev,
				   struct device_attribute *attr,
				   char *buf)
{
	struct pci_dev *pdev = to_pci_dev(dev);

	return sprintf(buf, "%u\n", pci_sriov_get_totalvfs(pdev));
}


Contributors
Person Tokens Prop Commits CommitProp
Donald Dutile 43 100.00% 2 100.00%
Total 43 100.00% 2 100.00%



static ssize_t sriov_numvfs_show(struct device *dev,
				 struct device_attribute *attr,
				 char *buf)
{
	struct pci_dev *pdev = to_pci_dev(dev);

	return sprintf(buf, "%u\n", pdev->sriov->num_VFs);
}

Contributors
Person Tokens Prop Commits CommitProp
Donald Dutile 43 97.73% 1 50.00%
Björn Helgaas 1 2.27% 1 50.00%
Total 44 100.00% 2 100.00%

/*
 * num_vfs > 0; number of VFs to enable
 * 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)
{
	struct pci_dev *pdev = to_pci_dev(dev);
	int ret;
	u16 num_vfs;

	ret = kstrtou16(buf, 0, &num_vfs);
	if (ret < 0)
		return ret;

	if (num_vfs > pci_sriov_get_totalvfs(pdev))
		return -ERANGE;

	device_lock(&pdev->dev);

	if (num_vfs == pdev->sriov->num_VFs)
		goto exit;

	/* 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");
		ret = -ENOENT;
		goto exit;
	}

	if (num_vfs == 0) {
		/* disable VFs */
		ret = pdev->driver->sriov_configure(pdev, 0);
		goto exit;
	}

	/* enable VFs */
	if (pdev->sriov->num_VFs) {
		dev_warn(&pdev->dev, "%d VFs already enabled. Disable before enabling %d VFs\n",
			 pdev->sriov->num_VFs, num_vfs);
		ret = -EBUSY;
		goto exit;
	}

	ret = pdev->driver->sriov_configure(pdev, num_vfs);
	if (ret < 0)
		goto exit;

	if (ret != num_vfs)
		dev_warn(&pdev->dev, "%d VFs requested; only %d enabled\n",
			 num_vfs, ret);

exit:
	device_unlock(&pdev->dev);

	if (ret < 0)
		return ret;

	return count;
}

Contributors
Person Tokens Prop Commits CommitProp
Donald Dutile 153 59.77% 1 20.00%
Björn Helgaas 54 21.09% 2 40.00%
Emil Tantilov 45 17.58% 1 20.00%
Jakub Kiciński 4 1.56% 1 20.00%
Total 256 100.00% 5 100.00%



static ssize_t sriov_drivers_autoprobe_show(struct device *dev,
					    struct device_attribute *attr,
					    char *buf)
{
	struct pci_dev *pdev = to_pci_dev(dev);

	return sprintf(buf, "%u\n", pdev->sriov->drivers_autoprobe);
}

Contributors
Person Tokens Prop Commits CommitProp
Bodong Wang 44 100.00% 1 100.00%
Total 44 100.00% 1 100.00%



static ssize_t sriov_drivers_autoprobe_store(struct device *dev,
					     struct device_attribute *attr,
					     const char *buf, size_t count)
{
	struct pci_dev *pdev = to_pci_dev(dev);
	bool drivers_autoprobe;

	if (kstrtobool(buf, &drivers_autoprobe) < 0)
		return -EINVAL;

	pdev->sriov->drivers_autoprobe = drivers_autoprobe;

	return count;
}

Contributors
Person Tokens Prop Commits CommitProp
Bodong Wang 64 100.00% 1 100.00%
Total 64 100.00% 1 100.00%


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);

static struct device_attribute sriov_drivers_autoprobe_attr =
		__ATTR(sriov_drivers_autoprobe, (S_IRUGO|S_IWUSR|S_IWGRP),
		       sriov_drivers_autoprobe_show, sriov_drivers_autoprobe_store);
#endif /* CONFIG_PCI_IOV */



static ssize_t driver_override_store(struct device *dev,
				     struct device_attribute *attr,
				     const char *buf, size_t count)
{
	struct pci_dev *pdev = to_pci_dev(dev);
	char *driver_override, *old, *cp;

	/* We need to keep extra room for a newline */
	if (count >= (PAGE_SIZE - 1))
		return -EINVAL;

	driver_override = kstrndup(buf, count, GFP_KERNEL);
	if (!driver_override)
		return -ENOMEM;

	cp = strchr(driver_override, '\n');
	if (cp)
		*cp = '\0';

	device_lock(dev);
	old = pdev->driver_override;
	if (strlen(driver_override)) {
		pdev->driver_override = driver_override;
	} else {
		kfree(driver_override);
		pdev->driver_override = NULL;
	}
	device_unlock(dev);

	kfree(old);

	return count;
}

Contributors
Person Tokens Prop Commits CommitProp
Alex Williamson 127 84.67% 1 33.33%
Nicolai Stange 16 10.67% 1 33.33%
Sasha Levin 7 4.67% 1 33.33%
Total 150 100.00% 3 100.00%



static ssize_t driver_override_show(struct device *dev,
				    struct device_attribute *attr, char *buf)
{
	struct pci_dev *pdev = to_pci_dev(dev);
	ssize_t len;

	device_lock(dev);
	len = snprintf(buf, PAGE_SIZE, "%s\n", pdev->driver_override);
	device_unlock(dev);
	return len;
}
Contributors
Person Tokens Prop Commits CommitProp
Alex Williamson 40 65.57% 1 33.33%
Nicolai Stange 18 29.51% 1 33.33%
Sasha Levin 3 4.92% 1 33.33%
Total 61 100.00% 3 100.00%

static DEVICE_ATTR_RW(driver_override);


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_revision.attr,
	&dev_attr_class.attr,
	&dev_attr_irq.attr,
	&dev_attr_local_cpus.attr,
	&dev_attr_local_cpulist.attr,
	&dev_attr_modalias.attr,
#ifdef CONFIG_NUMA
	&dev_attr_numa_node.attr,
#endif
	&dev_attr_dma_mask_bits.attr,
	&dev_attr_consistent_dma_mask_bits.attr,
	&dev_attr_enable.attr,
	&dev_attr_broken_parity_status.attr,
	&dev_attr_msi_bus.attr,
#if defined(CONFIG_PM) && defined(CONFIG_ACPI)
	&dev_attr_d3cold_allowed.attr,
#endif
#ifdef CONFIG_OF
	&dev_attr_devspec.attr,
#endif
	&dev_attr_driver_override.attr,
	NULL,
};


static struct attribute *pci_bridge_attrs[] = {
	&dev_attr_subordinate_bus_number.attr,
	&dev_attr_secondary_bus_number.attr,
	NULL,
};


static struct attribute *pcie_dev_attrs[] = {
	&dev_attr_current_link_speed.attr,
	&dev_attr_current_link_width.attr,
	&dev_attr_max_link_width.attr,
	&dev_attr_max_link_speed.attr,
	NULL,
};


static struct attribute *pcibus_attrs[] = {
	&dev_attr_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));
}
Contributors
Person Tokens Prop Commits CommitProp
Dave Airlie 51 64.56% 1 33.33%
Matthew Garrett 26 32.91% 1 33.33%
Matthew Wilcox 2 2.53% 1 33.33%
Total 79 100.00% 3 100.00%


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(kobj_to_dev(kobj));
	unsigned int size = 64;
	loff_t init_off = off;
	u8 *data = (u8 *) buf;

	/* Several chips lock up trying to read undefined config space */
	if (file_ns_capable(filp, &init_user_ns, CAP_SYS_ADMIN))
		size = dev->cfg_size;
	else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
		size = 128;

	if (off > size)
		return 0;
	if (off + count > size) {
		size -= off;
		count = size;
	} else {
		size = count;
	}

	pci_config_pm_runtime_get(dev);

	if ((off & 1) && size) {
		u8 val;
		pci_user_read_config_byte(dev, off, &val);
		data[off - init_off] = val;
		off++;
		size--;
	}

	if ((off & 3) && size > 2) {
		u16 val;
		pci_user_read_config_word(dev, off, &val);
		data[off - init_off] = val & 0xff;
		data[off - init_off + 1] = (val >> 8) & 0xff;
		off += 2;
		size -= 2;
	}

	while (size > 3) {
		u32 val;
		pci_user_read_config_dword(dev, off, &val);
		data[off - init_off] = val & 0xff;
		data[off - init_off + 1] = (val >> 8) & 0xff;
		data[off - init_off + 2] = (val >> 16) & 0xff;
		data[off - init_off + 3] = (val >> 24) & 0xff;
		off += 4;
		size -= 4;
	}

	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;
}

Contributors
Person Tokens Prop Commits CommitProp
Matthew Wilcox 234 54.29% 1 7.69%
ssant@in.ibm.com 143 33.18% 1 7.69%
Andrew Morton 17 3.94% 1 7.69%
Huang Ying 10 2.32% 1 7.69%
Chris Wright 7 1.62% 2 15.38%
Rui Zhang 5 1.16% 1 7.69%
Brian King 5 1.16% 1 7.69%
Eric Paris 3 0.70% 1 7.69%
Greg Kroah-Hartman 3 0.70% 1 7.69%
Dave Airlie 2 0.46% 1 7.69%
Geliang Tang 1 0.23% 1 7.69%
Linus Torvalds 1 0.23% 1 7.69%
Total 431 100.00% 13 100.00%



static ssize_t pci_write_config(struct file *filp, struct kobject *kobj,
				struct bin_attribute *bin_attr, char *buf,
				loff_t off, size_t count)
{
	struct pci_dev *dev = to_pci_dev(kobj_to_dev(kobj));
	unsigned int size = count;
	loff_t init_off = off;
	u8 *data = (u8 *) buf;

	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;
}

Contributors
Person Tokens Prop Commits CommitProp
Matthew Wilcox 178 49.17% 1 11.11%
ssant@in.ibm.com 132 36.46% 1 11.11%
Andrew Morton 17 4.70% 1 11.11%
Huang Ying 10 2.76% 1 11.11%
Greg Kroah-Hartman 9 2.49% 1 11.11%
Chris Wright 5 1.38% 1 11.11%
Brian King 5 1.38% 1 11.11%
Rui Zhang 5 1.38% 1 11.11%
Geliang Tang 1 0.28% 1 11.11%
Total 362 100.00% 9 100.00%



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(kobj_to_dev(kobj));

	if (bin_attr->size > 0) {
		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);
}

Contributors
Person Tokens Prop Commits CommitProp
Ben Hutchings 77 79.38% 1 20.00%
Hannes Reinecke 10 10.31% 1 20.00%
Chris Wright 5 5.15% 1 20.00%
Stephen Hemminger 4 4.12% 1 20.00%
Geliang Tang 1 1.03% 1 20.00%
Total 97 100.00% 5 100.00%



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(kobj_to_dev(kobj));

	if (bin_attr->size > 0) {
		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);
}

Contributors
Person Tokens Prop Commits CommitProp
Ben Hutchings 77 79.38% 1 20.00%
Hannes Reinecke 10 10.31% 1 20.00%
Chris Wright 5 5.15% 1 20.00%
Stephen Hemminger 4 4.12% 1 20.00%
Geliang Tang 1 1.03% 1 20.00%
Total 97 100.00% 5 100.00%

#ifdef HAVE_PCI_LEGACY
/**
 * pci_read_legacy_io - read byte(s) from legacy I/O port space
 * @filp: open sysfs file
 * @kobj: kobject corresponding to file to read from
 * @bin_attr: struct bin_attribute for this file
 * @buf: buffer to store results
 * @off: offset into legacy I/O port space
 * @count: number of bytes to read
 *
 * Reads 1, 2, or 4 bytes from legacy I/O port space using an arch specific
 * callback routine (pci_legacy_read).
 */


static ssize_t pci_read_legacy_io(struct file *filp, struct kobject *kobj,
				  struct bin_attribute *bin_attr, char *buf,
				  loff_t off, size_t count)
{
	struct pci_bus *bus = to_pci_bus(kobj_to_dev(kobj));

	/* Only support 1, 2 or 4 byte accesses */
	if (count != 1 && count != 2 && count != 4)
		return -EINVAL;

	return pci_legacy_read(bus, off, (u32 *)buf, count);
}

Contributors
Person Tokens Prop Commits CommitProp
Jesse Barnes 67 84.81% 1 20.00%
Rui Zhang 5 6.33% 1 20.00%
Chris Wright 5 6.33% 1 20.00%
Geliang Tang 1 1.27% 1 20.00%
Benjamin Herrenschmidt 1 1.27% 1 20.00%
Total 79 100.00% 5 100.00%

/**
 * pci_write_legacy_io - write byte(s) to legacy I/O port space
 * @filp: open sysfs file
 * @kobj: kobject corresponding to file to read from
 * @bin_attr: struct bin_attribute for this file
 * @buf: buffer containing value to be written
 * @off: offset into legacy I/O port space
 * @count: number of bytes to write
 *
 * Writes 1, 2, or 4 bytes from legacy I/O port space using an arch specific
 * callback routine (pci_legacy_write).
 */


static ssize_t pci_write_legacy_io(struct file *filp, struct kobject *kobj,
				   struct bin_attribute *bin_attr, char *buf,
				   loff_t off, size_t count)
{
	struct pci_bus *bus = to_pci_bus(kobj_to_dev(kobj));

	/* Only support 1, 2 or 4 byte accesses */
	if (count != 1 && count != 2 && count != 4)
		return -EINVAL;

	return pci_legacy_write(bus, off, *(u32 *)buf, count);
}

Contributors
Person Tokens Prop Commits CommitProp
Jesse Barnes 68 85.00% 1 20.00%
Chris Wright 5 6.25% 1 20.00%
Rui Zhang 5 6.25% 1 20.00%
Geliang Tang 1 1.25% 1 20.00%
Benjamin Herrenschmidt 1 1.25% 1 20.00%
Total 80 100.00% 5 100.00%

/**
 * pci_mmap_legacy_mem - map legacy PCI memory into user memory space
 * @filp: open sysfs file
 * @kobj: kobject corresponding to device to be mapped
 * @attr: struct bin_attribute for this file
 * @vma: struct vm_area_struct passed to mmap
 *
 * Uses an arch specific callback, pci_mmap_legacy_mem_page_range, to mmap
 * legacy memory space (first meg of bus space) into application virtual
 * memory space.
 */


static int pci_mmap_legacy_mem(struct file *filp, struct kobject *kobj,
			       struct bin_attribute *attr,
			       struct vm_area_struct *vma)
{
	struct pci_bus *bus = to_pci_bus(kobj_to_dev(kobj));

	return pci_mmap_legacy_page_range(bus, vma, pci_mmap_mem);
}

Contributors
Person Tokens Prop Commits CommitProp
Jesse Barnes 37 75.51% 1 25.00%
Benjamin Herrenschmidt 6 12.24% 1 25.00%
Chris Wright 5 10.20% 1 25.00%
Geliang Tang 1 2.04% 1 25.00%
Total 49 100.00% 4 100.00%

/**
 * pci_mmap_legacy_io - map legacy PCI IO into user memory space
 * @filp: open sysfs file
 * @kobj: kobject corresponding to device to be mapped
 * @attr: struct bin_attribute for this file
 * @vma: struct vm_area_struct passed to mmap
 *
 * Uses an arch specific callback, pci_mmap_legacy_io_page_range, to mmap
 * legacy IO space (first meg of bus space) into application virtual
 * memory space. Returns -ENOSYS if the operation isn't supported
 */


static int pci_mmap_legacy_io(struct file *filp, struct kobject *kobj,
			      struct bin_attribute *attr,
			      struct vm_area_struct *vma)
{
	struct pci_bus *bus = to_pci_bus(kobj_to_dev(kobj));

	return pci_mmap_legacy_page_range(bus, vma, pci_mmap_io);
}

Contributors
Person Tokens Prop Commits CommitProp
Benjamin Herrenschmidt 40 81.63% 1 25.00%
Chris Wright 5 10.20% 1 25.00%
Jesse Barnes 3 6.12% 1 25.00%
Geliang Tang 1 2.04% 1 25.00%
Total 49 100.00% 4 100.00%

/**
 * 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)
{
}

Contributors
Person Tokens Prop Commits CommitProp
Ivan Kokshaysky 13 92.86% 1 50.00%
Ryan Desfosses 1 7.14% 1 50.00%
Total 14 100.00% 2 100.00%

/**
 * 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;
}

Contributors
Person Tokens Prop Commits CommitProp
Benjamin Herrenschmidt 225 88.58% 1 20.00%
Ivan Kokshaysky 14 5.51% 1 20.00%
Mel Gorman 7 2.76% 1 20.00%
Eric W. Biedermann 7 2.76% 1 20.00%
Ryan Desfosses 1 0.39% 1 20.00%
Total 254 100.00% 5 100.00%



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 */
	}
}
Contributors
Person Tokens Prop Commits CommitProp
Benjamin Herrenschmidt 50 100.00% 1 100.00%
Total 50 100.00% 1 100.00%

#endif /* HAVE_PCI_LEGACY */

#if defined(HAVE_PCI_MMAP) || defined(ARCH_GENERIC_PCI_MMAP_RESOURCE)



int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vma,
		  enum pci_mmap_api mmap_api)
{
	unsigned long nr, start, size;
	resource_size_t pci_start = 0, pci_end;

	if (pci_resource_len(pdev, resno) == 0)
		return 0;
	nr = vma_pages(vma);
	start = vma->vm_pgoff;
	size = ((pci_resource_len(pdev, resno) - 1) >> PAGE_SHIFT) + 1;
	if (mmap_api == PCI_MMAP_PROCFS) {
		pci_resource_to_user(pdev, resno, &pdev->resource[resno],
				     &pci_start, &pci_end);
		pci_start >>= PAGE_SHIFT;
	}
	if (start >= pci_start && start < pci_start + size &&
			start + nr <= pci_start + size)
		return 1;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds 62 43.66% 1 16.67%
Martin Wilck 39 27.46% 1 16.67%
David Woodhouse 29 20.42% 1 16.67%
Ed Swierk 8 5.63% 1 16.67%
Li Bin 3 2.11% 1 16.67%
Darrick J. Wong 1 0.70% 1 16.67%
Total 142 100.00% 6 100.00%

/**
 * pci_mmap_resource - map a PCI resource into user memory space
 * @kobj: kobject for mapping
 * @attr: struct bin_attribute for the file being mapped
 * @vma: struct vm_area_struct passed into the mmap
 * @write_combine: 1 for write_combine mapping
 *
 * Use the regular PCI mapping routines to map a PCI resource into userspace.
 */


static int pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr,
			     struct vm_area_struct *vma, int write_combine)
{
	struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj));
	int bar = (unsigned long)attr->private;
	enum pci_mmap_state mmap_type;
	struct resource *res = &pdev->resource[bar];

	if (res->flags & IORESOURCE_MEM && iomem_is_exclusive(res->start))
		return -EINVAL;

	if (!pci_mmap_fits(pdev, bar, 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), bar,
			(u64)pci_resource_start(pdev, bar),
			(u64)pci_resource_len(pdev, bar));
		return -EINVAL;
	}
	mmap_type = res->flags & IORESOURCE_MEM ? pci_mmap_mem : pci_mmap_io;

	return pci_mmap_resource_range(pdev, bar, vma, mmap_type, write_combine);
}

Contributors
Person Tokens Prop Commits CommitProp
Jesse Barnes 61 33.89% 1 8.33%
Martin Wilck 44 24.44% 1 8.33%
Björn Helgaas 19 10.56% 1 8.33%
David Woodhouse 19 10.56% 3 25.00%
Linus Torvalds 15 8.33% 1 8.33%
Michael Ellerman 7 3.89% 1 8.33%
Venkatesh Pallipadi 7 3.89% 1 8.33%
Randy Dunlap 6 3.33% 1 8.33%
Geliang Tang 1 0.56% 1 8.33%
Ryan Desfosses 1 0.56% 1 8.33%
Total 180 100.00% 12 100.00%



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);
}

Contributors
Person Tokens Prop Commits CommitProp
Venkatesh Pallipadi 29 76.32% 1 33.33%
Chris Wright 5 13.16% 1 33.33%
Jesse Barnes 4 10.53% 1 33.33%
Total 38 100.00% 3 100.00%



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);
}

Contributors
Person Tokens Prop Commits CommitProp
Venkatesh Pallipadi 33 86.84% 1 50.00%
Chris Wright 5 13.16% 1 50.00%
Total 38 100.00% 2 100.00%



static ssize_t pci_resource_io(struct file *filp, struct kobject *kobj,
			       struct bin_attribute *attr, char *buf,
			       loff_t off, size_t count, bool write)
{
	struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj));
	int bar = (unsigned long)attr->private;
	unsigned long port = off;

	port += pci_resource_start(pdev, bar);

	if (port > pci_resource_end(pdev, bar))
		return 0;

	if (port + count - 1 > pci_resource_end(pdev, bar))
		return -EINVAL;

	switch (count) {
	case 1:
		if (write)
			outb(*(u8 *)buf, port);
		else
			*(u8 *)buf = inb(port);
		return 1;
	case 2:
		if (write)
			outw(*(u16 *)buf, port);
		else
			*(u16 *)buf = inw(port);
		return 2;
	case 4:
		if (write)
			outl(*(u32 *)buf, port);
		else
			*(u32 *)buf = inl(port);
		return 4;
	}
	return -EINVAL;
}

Contributors
Person Tokens Prop Commits CommitProp
Alex Williamson 211 95.48% 1 33.33%
David Woodhouse 9 4.07% 1 33.33%
Geliang Tang 1 0.45% 1 33.33%
Total 221 100.00% 3 100.00%



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);
}

Contributors
Person Tokens Prop Commits CommitProp
Alex Williamson 49 100.00% 1 100.00%
Total 49 100.00% 1 100.00%



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);
}

Contributors
Person Tokens Prop Commits CommitProp
Alex Williamson 49 100.00% 1 100.00%
Total 49 100.00% 1 100.00%

/**
 * 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);
		}
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Greg Kroah-Hartman 64 65.31% 1 33.33%
Venkatesh Pallipadi 32 32.65% 1 33.33%
Jesse Barnes 2 2.04% 1 33.33%
Total 98 100.00% 3 100.00%



static int pci_create_attr(struct pci_dev *pdev, int num, int write_combine)
{
	/* allocate attribute structure, piggyback attribute name */
	int name_len = write_combine ? 13 : 10;
	struct bin_attribute *res_attr;
	char *res_attr_name;
	int retval;

	res_attr = kzalloc(sizeof(*res_attr) + name_len, GFP_ATOMIC);
	if (!res_attr)
		return -ENOMEM;

	res_attr_name = (char *)(res_attr + 1);

	sysfs_bin_attr_init(res_attr);
	if (write_combine) {
		pdev->res_attr_wc[num] = res_attr;
		sprintf(res_attr_name, "resource%d_wc", num);
		res_attr->mmap = pci_mmap_resource_wc;
	} else {
		pdev->res_attr[num] = res_attr;
		sprintf(res_attr_name, "resource%d", num);
		if (pci_resource_flags(pdev, num) & IORESOURCE_IO) {
			res_attr->read = pci_read_resource_io;
			res_attr->write = pci_write_resource_io;
			if (arch_can_pci_mmap_io())
				res_attr->mmap = pci_mmap_resource_uc;
		} else {
			res_attr->mmap = pci_mmap_resource_uc;
		}
	}
	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 = (void *)(unsigned long)num;
	retval = sysfs_create_bin_file(&pdev->dev.kobj, res_attr);
	if (retval)
		kfree(res_attr);

	return retval;
}

Contributors
Person Tokens Prop Commits CommitProp
Jesse Barnes 77 31.43% 2 16.67%
Venkatesh Pallipadi 63 25.71% 1 8.33%
David Woodhouse 29 11.84% 2 16.67%
Alex Williamson 25 10.20% 1 8.33%
Dmitry Torokhov 22 8.98% 1 8.33%
Björn Helgaas 18 7.35% 2 16.67%
Eric W. Biedermann 5 2.04% 1 8.33%
Greg Kroah-Hartman 5 2.04% 1 8.33%
Pekka J Enberg 1 0.41% 1 8.33%
Total 245 100.00% 12 100.00%

/**
 * 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 && arch_can_pci_mmap_wc() &&
		    pdev->resource[i].flags & IORESOURCE_PREFETCH)
			retval = pci_create_attr(pdev, i, 1);
		if (retval) {
			pci_remove_resource_files(pdev);
			return retval;
		}
	}
	return 0;
}
Contributors
Person Tokens Prop Commits CommitProp
Venkatesh Pallipadi 82 78.85% 1 25.00%
Jesse Barnes 11 10.58% 1 25.00%
Greg Kroah-Hartman 8 7.69% 1 25.00%
David Woodhouse 3 2.88% 1 25.00%
Total 104 100.00% 4 100.00%

#else /* !HAVE_PCI_MMAP */


int __weak pci_create_resource_files(struct pci_dev *dev) { return 0; }
Contributors
Person Tokens Prop Commits CommitProp
Jesse Barnes 9 64.29% 1 33.33%
Greg Kroah-Hartman 4 28.57% 1 33.33%
Ivan Kokshaysky 1 7.14% 1 33.33%
Total 14 100.00% 3 100.00%



void __weak pci_remove_resource_files(struct pci_dev *dev) { return; }
Contributors
Person Tokens Prop Commits CommitProp
Jesse Barnes 11 91.67% 1 50.00%
Ivan Kokshaysky 1 8.33% 1 50.00%
Total 12 100.00% 2 100.00%

#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(kobj_to_dev(kobj));

	if ((off ==  0) && (*buf == '0') && (count == 2))
		pdev->rom_attr_enabled = 0;
	else
		pdev->rom_attr_enabled = 1;

	return count;
}

Contributors
Person Tokens Prop Commits CommitProp
Jon Smirl 70 86.42% 1 25.00%
Rui Zhang 5 6.17% 1 25.00%
Chris Wright 5 6.17% 1 25.00%
Geliang Tang 1 1.23% 1 25.00%
Total 81 100.00% 4 100.00%

/**
 * pci_read_rom - read a PCI ROM
 * @filp: sysfs file
 * @kobj: kernel object handle
 * @bin_attr: struct bin_attribute for this file
 * @buf: where to put the data we read from the ROM
 * @off: file offset
 * @count: number of bytes to read
 *
 * Put @count bytes starting at @off into @buf from the ROM in the PCI
 * device corresponding to @kobj.
 */


static ssize_t pci_read_rom(struct file *filp, struct kobject *kobj,
			    struct bin_attribute *bin_attr, char *buf,
			    loff_t off, size_t count)
{
	struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj));
	void __iomem *rom;
	size_t size;

	if (!pdev->rom_attr_enabled)
		return -EINVAL;

	rom = pci_map_rom(pdev, &size);	/* size starts out as PCI window size */
	if (!rom || !size)
		return -EIO;

	if (off >= size)
		count = 0;
	else {
		if (off + count > size)
			count = size - off;

		memcpy_fromio(buf, rom + off, count);
	}
	pci_unmap_rom(pdev, rom);

	return count;
}

Contributors
Person Tokens Prop Commits CommitProp
Jon Smirl 118 88.06% 1 20.00%
Chris Wright 5 3.73% 1 20.00%
Rui Zhang 5 3.73% 1 20.00%
Timothy S. Nelson 5 3.73% 1 20.00%
Geliang Tang 1 0.75% 1 20.00%
Total 134 100.00% 5 100.00%


static const 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 const 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,
};



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;
}

Contributors
Person Tokens Prop Commits CommitProp
Michael S. Tsirkin 74 83.15% 1 33.33%
Michal Schmidt 14 15.73% 1 33.33%
Jingoo Han 1 1.12% 1 33.33%
Total 89 100.00% 3 100.00%


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 = 0;
		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;
}

Contributors
Person Tokens Prop Commits CommitProp
Michael S. Tsirkin 85 38.46% 1 10.00%
Ben Hutchings 78 35.29% 2 20.00%
Yu Zhao 39 17.65% 1 10.00%
Daniel Stekloff 6 2.71% 1 10.00%
Eric W. Biedermann 5 2.26% 1 10.00%
Greg Kroah-Hartman 4 1.81% 1 10.00%
Stephen Hemminger 2 0.90% 1 10.00%
Jon Smirl 1 0.45% 1 10.00%
Hannes Reinecke 1 0.45% 1 10.00%
Total 221 100.00% 10 100.00%



int __must_check pci_create_sysfs_dev_files(struct pci_dev *pdev)
{
	int retval;
	int rom_size;
	struct bin_attribute *attr;

	if (!sysfs_initialized)
		return -EACCES;

	if (pdev->cfg_size > PCI_CFG_SPACE_SIZE)
		retval = sysfs_create_bin_file(&pdev->dev.kobj, &pcie_config_attr);
	else
		retval = sysfs_create_bin_file(&pdev->dev.kobj, &pci_config_attr);
	if (retval)
		goto err;

	retval = pci_create_resource_files(pdev);
	if (retval)
		goto err_config_file;

	/* If the device has a ROM, try to expose it in sysfs. */
	rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE);
	if (rom_size) {
		attr = kzalloc(sizeof(*attr), GFP_ATOMIC);
		if (!attr) {
			retval = -ENOMEM;
			goto err_resource_files;
		}
		sysfs_bin_attr_init(attr);
		attr->size = rom_size;
		attr->attr.name = "rom";
		attr->attr.mode = 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 sysfs entries for various capabilities */
	retval = pci_create_capabilities_sysfs(pdev);
	if (retval)
		goto err_rom_file;

	pci_create_firmware_label_files(pdev);

	return 0;

err_rom_file:
	if (pdev->rom_attr) {
		sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr);
		kfree(pdev->rom_attr);
		pdev->rom_attr = NULL;
	}
err_resource_files:
	pci_remove_resource_files(pdev);
err_config_file:
	if (pdev->cfg_size > PCI_CFG_SPACE_SIZE)
		sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr);
	else
		sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr);
err:
	return retval;
}

Contributors
Person Tokens Prop Commits CommitProp
Yu Zhao 117 36.68% 1 5.56%
Jon Smirl 61 19.12% 1 5.56%
Greg Kroah-Hartman 60 18.81% 1 5.56%
Ben Hutchings 25 7.84% 1 5.56%
Michael Ellerman 19 5.96% 2 11.11%
Jason S. McMullan 8 2.51% 1 5.56%
Eric W. Biedermann 5 1.57% 1 5.56%
Jesse Barnes 5 1.57% 1 5.56%
Narendra K 5 1.57% 1 5.56%
Björn Helgaas 4 1.25% 2 11.11%
David Shaohua Li 4 1.25% 1 5.56%
Alex Williamson 2 0.63% 1 5.56%
Eric Sesterhenn / Snakebyte 1 0.31% 1 5.56%
Daniel Stekloff 1 0.31% 1 5.56%
Dave Airlie 1 0.31% 1 5.56%
Yinghai Lu 1 0.31% 1 5.56%
Total 319 100.00% 18 100.00%



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;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Ben Hutchings 26 32.50% 1 25.00%
Michael S. Tsirkin 25 31.25% 1 25.00%
Yu Zhao 19 23.75% 1 25.00%
Jon Smirl 10 12.50% 1 25.00%
Total 80 100.00% 4 100.00%

/**
 * pci_remove_sysfs_dev_files - cleanup PCI specific sysfs files
 * @pdev: device whose entries we should free
 *
 * Cleanup when @pdev is removed from sysfs.
 */


void pci_remove_sysfs_dev_files(struct pci_dev *pdev)
{
	if (!sysfs_initialized)
		return;

	pci_remove_capabilities_sysfs(pdev);

	if (pdev->cfg_size > PCI_CFG_SPACE_SIZE)
		sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr);
	else
		sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr);

	pci_remove_resource_files(pdev);

	if (pdev->rom_attr) {
		sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr);
		kfree(pdev->rom_attr);
		pdev->rom_attr = NULL;
	}

	pci_remove_firmware_label_files(pdev);
}

Contributors
Person Tokens Prop Commits CommitProp
Jon Smirl 59 58.42% 1 14.29%
Yu Zhao 20 19.80% 1 14.29%
Björn Helgaas 6 5.94% 1 14.29%
Jesse Barnes 5 4.95% 1 14.29%
Narendra K 5 4.95% 1 14.29%
Jason S. McMullan 4 3.96% 1 14.29%
David S. Miller 2 1.98% 1 14.29%
Total 101 100.00% 7 100.00%



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;
}
Contributors
Person Tokens Prop Commits CommitProp
Jon Smirl 30 56.60% 1 25.00%
Greg Kroah-Hartman 14 26.42% 1 25.00%
Julia Lawall 7 13.21% 1 25.00%
Rolf Eike Beer 2 3.77% 1 25.00%
Total 53 100.00% 4 100.00%


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 = kobj_to_dev(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;
}

Contributors
Person Tokens Prop Commits CommitProp
Yinghai Lu 67 98.53% 2 66.67%
Geliang Tang 1 1.47% 1 33.33%
Total 68 100.00% 3 100.00%


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 = kobj_to_dev(kobj);
	struct pci_dev *pdev = to_pci_dev(dev);

	if (pdev->is_virtfn)
		return 0;

	return a->mode;
}

Contributors
Person Tokens Prop Commits CommitProp
Jiang Liu 52 98.11% 1 50.00%
Geliang Tang 1 1.89% 1 50.00%
Total 53 100.00% 2 100.00%



static umode_t pci_bridge_attrs_are_visible(struct kobject *kobj,
					    struct attribute *a, int n)
{
	struct device *dev = kobj_to_dev(kobj);
	struct pci_dev *pdev = to_pci_dev(dev);

	if (pci_is_bridge(pdev))
		return a->mode;

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Wong Vee Khee 54 100.00% 1 100.00%
Total 54 100.00% 1 100.00%



static umode_t pcie_dev_attrs_are_visible(struct kobject *kobj,
					  struct attribute *a, int n)
{
	struct device *dev = kobj_to_dev(kobj);
	struct pci_dev *pdev = to_pci_dev(dev);

	if (pci_is_pcie(pdev))
		return a->mode;

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Wong Vee Khee 54 100.00% 1 100.00%
Total 54 100.00% 1 100.00%


static const struct attribute_group pci_dev_group = {
	.attrs = pci_dev_attrs,
};


const struct attribute_group *pci_dev_groups[] = {
	&pci_dev_group,
	NULL,
};


static const struct attribute_group pci_bridge_group = {
	.attrs = pci_bridge_attrs,
};


const struct attribute_group *pci_bridge_groups[] = {
	&pci_bridge_group,
	NULL,
};


static const struct attribute_group pcie_dev_group = {
	.attrs = pcie_dev_attrs,
};


const struct attribute_group *pcie_dev_groups[] = {
	&pcie_dev_group,
	NULL,
};


static const struct attribute_group pci_dev_hp_attr_group = {
	.attrs = pci_dev_hp_attrs,
	.is_visible = pci_dev_hp_attrs_are_visible,
};

#ifdef CONFIG_PCI_IOV

static struct attribute *sriov_dev_attrs[] = {
	&sriov_totalvfs_attr.attr,
	&sriov_numvfs_attr.attr,
	&sriov_drivers_autoprobe_attr.attr,
	NULL,
};



static umode_t sriov_attrs_are_visible(struct kobject *kobj,
				       struct attribute *a, int n)
{
	struct device *dev = kobj_to_dev(kobj);

	if (!dev_is_pf(dev))
		return 0;

	return a->mode;
}

Contributors
Person Tokens Prop Commits CommitProp
Donald Dutile 44 97.78% 1 50.00%
Geliang Tang 1 2.22% 1 50.00%
Total 45 100.00% 2 100.00%


static const struct attribute_group sriov_dev_attr_group = {
	.attrs = sriov_dev_attrs,
	.is_visible = sriov_attrs_are_visible,
};
#endif /* CONFIG_PCI_IOV */


static const struct attribute_group pci_dev_attr_group = {
	.attrs = pci_dev_dev_attrs,
	.is_visible = pci_dev_attrs_are_visible,
};


static const struct attribute_group pci_bridge_attr_group = {
	.attrs = pci_bridge_attrs,
	.is_visible = pci_bridge_attrs_are_visible,
};


static const struct attribute_group pcie_dev_attr_group = {
	.attrs = pcie_dev_attrs,
	.is_visible = pcie_dev_attrs_are_visible,
};


static const struct attribute_group *pci_dev_attr_groups[] = {
	&pci_dev_attr_group,
	&pci_dev_hp_attr_group,
#ifdef CONFIG_PCI_IOV
	&sriov_dev_attr_group,
#endif
	&pci_bridge_attr_group,
	&pcie_dev_attr_group,
	NULL,
};


struct device_type pci_dev_type = {
	.groups = pci_dev_attr_groups,
};
Overall Contributors
Person Tokens Prop Commits CommitProp
Wong Vee Khee 792 9.71% 1 0.69%
Greg Kroah-Hartman 593 7.27% 13 8.97%
Alex Williamson 514 6.30% 3 2.07%
Matthew Wilcox 478 5.86% 2 1.38%
Yinghai Lu 378 4.64% 6 4.14%
Jesse Barnes 378 4.64% 5 3.45%
Donald Dutile 373 4.57% 2 1.38%
Jon Smirl 358 4.39% 1 0.69%
Benjamin Herrenschmidt 323 3.96% 1 0.69%
Ben Hutchings 283 3.47% 2 1.38%
ssant@in.ibm.com 275 3.37% 1 0.69%
Venkatesh Pallipadi 246 3.02% 1 0.69%
Alexander Chiang 221 2.71% 3 2.07%
Yu Zhao 203 2.49% 3 2.07%
Michael S. Tsirkin 200 2.45% 1 0.69%
Brice Goglin 166 2.04% 2 1.38%
Huang Ying 161 1.97% 2 1.38%
Bodong Wang 135 1.66% 1 0.69%
Jiang Liu 131 1.61% 1 0.69%
Daniel Stekloff 116 1.42% 1 0.69%
Prarit Bhargava 112 1.37% 1 0.69%
Björn Helgaas 104 1.28% 8 5.52%
David Woodhouse 99 1.21% 6 4.14%
Doug Thompson 89 1.09% 1 0.69%
Martin Wilck 83 1.02% 1 0.69%
Sebastian Ott 82 1.01% 1 0.69%
Linus Torvalds 81 0.99% 2 1.38%
Yijing Wang 81 0.99% 2 1.38%
Michael Ellerman 79 0.97% 3 2.07%
Trent Piepho 78 0.96% 1 0.69%
Chris Wright 74 0.91% 3 2.07%
Iñaky Pérez-González 67 0.82% 1 0.69%
Dave Airlie 63 0.77% 1 0.69%
Arjan van de Ven 60 0.74% 1 0.69%
Mike Travis 49 0.60% 2 1.38%
Emil Tantilov 45 0.55% 1 0.69%
Andrew Morton 34 0.42% 1 0.69%
Nicolai Stange 34 0.42% 1 0.69%
Sudeep Holla 31 0.38% 1 0.69%
Rui Zhang 30 0.37% 1 0.69%
Ivan Kokshaysky 30 0.37% 1 0.69%
Matthew Garrett 29 0.36% 1 0.69%
Andi Kleen 27 0.33% 1 0.69%
Dmitry Torokhov 22 0.27% 1 0.69%
Eric W. Biedermann 22 0.27% 1 0.69%
Hannes Reinecke 21 0.26% 2 1.38%
Mathias Krause 21 0.26% 1 0.69%
Andreas Herrmann 18 0.22% 1 0.69%
Mika Westerberg 17 0.21% 1 0.69%
Geliang Tang 15 0.18% 1 0.69%
Michal Schmidt 14 0.17% 1 0.69%
Rafael J. Wysocki 14 0.17% 2 1.38%
Tejun Heo 14 0.17% 2 1.38%
David John 14 0.17% 1 0.69%
Sasha Levin 13 0.16% 2 1.38%
Jason S. McMullan 12 0.15% 1 0.69%
Emil Velikov 12 0.15% 1 0.69%
Brian King 10 0.12% 1 0.69%
Stephen Hemminger 10 0.12% 1 0.69%
Narendra K 10 0.12% 1 0.69%
Yani Ioannou 10 0.12% 1 0.69%
Jingoo Han 9 0.11% 1 0.69%
Randy Dunlap 8 0.10% 2 1.38%
Ed Swierk 8 0.10% 1 0.69%
David Shaohua Li 7 0.09% 1 0.69%
Mel Gorman 7 0.09% 1 0.69%
Julia Lawall 7 0.09% 1 0.69%
Timothy S. Nelson 5 0.06% 1 0.69%
Arvind Yadav 5 0.06% 1 0.69%
Sachin Kamat 5 0.06% 1 0.69%
Alan Cox 4 0.05% 1 0.69%
Jakub Kiciński 4 0.05% 1 0.69%
Ryan Desfosses 4 0.05% 2 1.38%
Alexey Dobriyan 3 0.04% 1 0.69%
Paul Gortmaker 3 0.04% 1 0.69%
Eric Paris 3 0.04% 1 0.69%
Li Bin 3 0.04% 1 0.69%
Anton Blanchard 3 0.04% 1 0.69%
Bhumika Goyal 2 0.02% 1 0.69%
Rolf Eike Beer 2 0.02% 1 0.69%
David S. Miller 2 0.02% 1 0.69%
Rob Herring 1 0.01% 1 0.69%
Ricardo Ribalda Delgado 1 0.01% 1 0.69%
Darrick J. Wong 1 0.01% 1 0.69%
Pekka J Enberg 1 0.01% 1 0.69%
Lucas De Marchi 1 0.01% 1 0.69%
Eric Sesterhenn / Snakebyte 1 0.01% 1 0.69%
Yuji Shimada 1 0.01% 1 0.69%
Total 8155 100.00% 145 100.00%
Directory: drivers/pci

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.
Person	Tokens	Prop	Commits	CommitProp
Doug Thompson	42	100.00%	1	100.00%
Total	42	100.00%	1	100.00%
cregit-Linux how code gets into the kernel

Release 4.14 drivers/pci/pci-sysfs.c

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