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Message-ID: <EDA0A4495861324DA2618B4C45DCB3EE612913@blrx3m08.blr.amer.dell.com>
Date: Sat, 5 Jun 2010 02:01:35 +0530
From: <Narendra_K@...l.com>
To: <Narendra_K@...l.com>, <greg@...ah.com>
Cc: <netdev@...r.kernel.org>, <linux-hotplug@...r.kernel.org>,
<linux-pci@...r.kernel.org>, <Matt_Domsch@...l.com>
Subject: RE: [PATCH V2 1/2] Export firmware assigned labels of network devices to sysfs
With regards,
Narendra K
> -----Original Message-----
> From: netdev-owner@...r.kernel.org [mailto:netdev-
> owner@...r.kernel.org] On Behalf Of Narendra K
> Sent: Friday, June 04, 2010 2:37 AM
> To: greg@...ah.com
> Cc: netdev@...r.kernel.org; linux-hotplug@...r.kernel.org; linux-
> pci@...r.kernel.org; Domsch, Matt
> Subject: Re: [PATCH V2 1/2] Export firmware assigned labels of network
> devices to sysfs
>
> > -----Original Message-----
> > From: Greg KH [mailto:greg@...ah.com]
> > Sent: Friday, May 28, 2010 9:11 PM
> > To: K, Narendra
> > Cc: netdev@...r.kernel.org; linux-hotplug@...r.kernel.org;
> > linux-pci@...r.kernel.org; Domsch, Matt; Hargrave, Jordan; Rose,
> > Charles; Nijhawan, Vijay
> > Subject: Re: [PATCH 1/2] Export firmware assigned labels of network
> > devices to sysfs
> >
> Thanks for the comments.
>
> > On Fri, May 28, 2010 at 06:55:21AM -0500, K, Narendra wrote:
> > > Please refer to the PCI-SIG Draft ECN
> > > "PCIe Device Labeling under Operating Systems Draft ECN" at this
> link
> > -
> > > http://www.pcisig.com/specifications/pciexpress/review_zone/.
> > >
> > > It would be great to know your views on this ECN. Please let us
> know
> > if you have
> > > have any suggestions or changes.
> >
> > Note that only members of the PCI-SIG can do this, which pretty much
> > rules out any "normal" Linux kernel developer :(
> >
> > Care to post a public version of this for us to review?
> > > --- /dev/null
> > > +++ b/drivers/pci/pci-label.c
> > > @@ -0,0 +1,242 @@
> > > +/*
> > > + * File: drivers/pci/pci-label.c
> >
> > This line is not needed, we know the file name :)
> >
> > > + * Purpose: Export the firmware label associated with a pci
> > network interface
> > > + * device to sysfs
> > > + * Copyright (C) 2010 Dell Inc.
> > > + * by Narendra K <Narendra_K@...l.com>, Jordan Hargrave
> > <Jordan_Hargrave@...l.com>
> > > + *
> > > + * This code checks if the pci network device has a related ACPI
> > _DSM. If
> > > + * available, the code calls the _DSM to retrieve the index and
> > string and
> > > + * exports them to sysfs. If the ACPI _DSM is not available, it
> falls
> > back on
> > > + * SMBIOS. SMBIOS defines type 41 for onboard pci devices. This
> code
> > retrieves
> > > + * strings associated with the type 41 and exports it to sysfs.
> > > + *
> > > + * Please see
> http://linux.dell.com/wiki/index.php/Oss/libnetdevname
> > for more
> > > + * information.
> > > + */
> > > +
> > > +#include <linux/pci-label.h>
> >
> > Why is this file in include/linux/ ? Who needs it there? Can't it
> just
> > be in in the drivers/pci/ directory? Actually all you need is 2
> > functions in there, so it could go into the internal pci.h file in
> that
> > directory without a problem, right?
> >
>
> This file is removed and functions are moved to the internal pci.h
>
> > > +
> > > +static ssize_t
> > > +smbiosname_string_exists(struct device *dev, char *buf)
> > > +{
> > > + struct pci_dev *pdev = to_pci_dev(dev);
> > > + const struct dmi_device *dmi;
> > > + struct dmi_devslot *dslot;
> > > + int bus;
> > > + int devfn;
> > > +
> > > + bus = pdev->bus->number;
> > > + devfn = pdev->devfn;
> > > +
> > > + dmi = NULL;
> > > + while ((dmi = dmi_find_device(DMI_DEV_TYPE_DEVSLOT, NULL,
> > dmi)) != NULL) {
> > > + dslot = dmi->device_data;
> > > + if (dslot && dslot->bus == bus && dslot->devfn ==
> > devfn) {
> > > + if (buf)
> > > + return scnprintf(buf, PAGE_SIZE,
> > "%s\n", dmi->name);
> > > + return strlen(dmi->name);
> > > + }
> > > + }
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static ssize_t
> > > +smbiosname_show(struct device *dev, struct device_attribute *attr,
> > char *buf)
> > > +{
> > > + return smbiosname_string_exists(dev, buf);
> > > +}
> > > +
> > > +struct smbios_attribute smbios_attr_label = {
> > > + .attr = {.name = __stringify(label), .mode = 0444, .owner =
> > THIS_MODULE},
> >
> > Can't you just put "label" as the name?
> >
>
> This is fixed.
>
> > > + .show = smbiosname_show,
> > > + .test = smbiosname_string_exists,
> > > +};
> > > +
> > > +static int
> > > +pci_create_smbiosname_file(struct pci_dev *pdev)
> > > +{
> > > + if (smbios_attr_label.test &&
> > smbios_attr_label.test(&pdev->dev, NULL)) {
> > > + sysfs_create_file(&pdev->dev.kobj,
> > &smbios_attr_label.attr);
> > > + return 0;
> > > + }
> > > + return -1;
> > > +}
> > > +
> > > +static int
> > > +pci_remove_smbiosname_file(struct pci_dev *pdev)
> > > +{
> > > + if (smbios_attr_label.test &&
> > smbios_attr_label.test(&pdev->dev, NULL)) {
> > > + sysfs_remove_file(&pdev->dev.kobj,
> > &smbios_attr_label.attr);
> > > + return 0;
> > > + }
> > > + return -1;
> > > +}
> > > +
> > > +static const char dell_dsm_uuid[] = {
> >
> > Um, a dell specific uuid in a generic file? What happens when we
> need
> > to support another manufacturer?
> >
>
> My understanding of uuid was incorrect. I have renamed it to a more
> generic
> device_label_dsm_uuid and ACPI_DSM_FUNCTION to DEVICE_LABEL_DSM
>
> > > + 0xD0, 0x37, 0xC9, 0xE5, 0x53, 0x35, 0x7A, 0x4D,
> > > + 0x91, 0x17, 0xEA, 0x4D, 0x19, 0xC3, 0x43, 0x4D
> > > +};
> > > +
> > > +
> > > +static int
> > > +dsm_get_label(acpi_handle handle, int func,
> > > + struct acpi_buffer *output,
> > > + char *buf, char *attribute)
> > > +{
> > > + struct acpi_object_list input;
> > > + union acpi_object params[4];
> > > + union acpi_object *obj;
> > > + int len = 0;
> > > +
> > > + int err;
> > > +
> > > + input.count = 4;
> > > + input.pointer = params;
> > > + params[0].type = ACPI_TYPE_BUFFER;
> > > + params[0].buffer.length = sizeof(dell_dsm_uuid);
> > > + params[0].buffer.pointer = (char *)dell_dsm_uuid;
> > > + params[1].type = ACPI_TYPE_INTEGER;
> > > + params[1].integer.value = 0x02;
> > > + params[2].type = ACPI_TYPE_INTEGER;
> > > + params[2].integer.value = func;
> > > + params[3].type = ACPI_TYPE_PACKAGE;
> > > + params[3].package.count = 0;
> > > + params[3].package.elements = NULL;
> > > +
> > > + err = acpi_evaluate_object(handle, "_DSM", &input, output);
> > > + if (err) {
> > > + printk(KERN_INFO "failed to evaulate _DSM\n");
> > > + return -1;
> > > + }
> > > +
> > > + obj = (union acpi_object *)output->pointer;
> > > +
> > > + switch (obj->type) {
> > > + case ACPI_TYPE_PACKAGE:
> > > + if (obj->package.count == 2) {
> > > + len = obj-
> >package.elements[0].integer.value;
> > > + if (buf) {
> > > + if (!strncmp(attribute, "index",
> > strlen(attribute)))
> > > + scnprintf(buf, PAGE_SIZE,
> > "%lu\n",
> > > +
> > obj->package.elements[0].integer.value);
> > > + else
> > > + scnprintf(buf, PAGE_SIZE,
> > "%s\n",
> > > +
> > obj->package.elements[1].string.pointer);
> > > + kfree(output->pointer);
> > > + return strlen(buf);
> > > + }
> > > + }
> > > + kfree(output->pointer);
> > > + return len;
> > > + break;
> > > + default:
> > > + return -1;
> > > + }
> > > +}
> > > +
> > > +static ssize_t
> > > +acpi_index_string_exist(struct device *dev, char *buf, char
> > *attribute)
> > > +{
> > > + struct pci_dev *pdev = to_pci_dev(dev);
> > > +
> > > + struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL};
> > > + acpi_handle handle;
> > > + int length;
> > > + int is_addin_card = 0;
> > > +
> > > + if ((pdev->class >> 16) != PCI_BASE_CLASS_NETWORK)
> > > + return -1;
> > > +
> > > + handle = DEVICE_ACPI_HANDLE(dev);
> > > +
> > > + if (!handle) {
> > > + /*
> > > + * The device is an add-in network controller and
> does
> > have
> > > + * a valid handle. Try until we get the handle for
> the
> > parent
> > > + * bridge
> > > + */
> > > + struct pci_bus *pbus;
> > > + for (pbus = pdev->bus; pbus; pbus = pbus->parent) {
> > > + handle =
> > DEVICE_ACPI_HANDLE(&(pbus->self->dev));
> > > + if (handle)
> > > + break;
> > > +
> > > + }
> > > + }
> > > +
> > > + if ((length = dsm_get_label(handle, DELL_DSM_NETWORK,
> > > + &output, buf, attribute)) < 0)
> > > + return -1;
> > > +
> > > + return length;
> > > +}
> > > +
> > > +static ssize_t
> > > +acpilabel_show(struct device *dev, struct device_attribute *attr,
> > char *buf)
> > > +{
> > > + return acpi_index_string_exist(dev, buf, "label");
> > > +}
> > > +
> > > +static ssize_t
> > > +acpiindex_show(struct device *dev, struct device_attribute *attr,
> > char *buf)
> > > +{
> > > + return acpi_index_string_exist(dev, buf, "index");
> > > +}
> > > +
> > > +struct acpi_attribute acpi_attr_label = {
> > > + .attr = {.name = __stringify(label), .mode = 0444, .owner =
> > THIS_MODULE},
> > > + .show = acpilabel_show,
> > > + .test = acpi_index_string_exist,
> > > +};
> > > +
> > > +struct acpi_attribute acpi_attr_index = {
> > > + .attr = {.name = __stringify(index), .mode = 0444, .owner =
> > THIS_MODULE},
> > > + .show = acpiindex_show,
> > > + .test = acpi_index_string_exist,
> > > +};
> > > +
> > > +static int
> > > +pci_create_acpi_index_label_files(struct pci_dev *pdev)
> > > +{
> > > + if (acpi_attr_label.test && acpi_attr_label.test(&pdev-
> >dev,
> > NULL) > 0) {
> > > + sysfs_create_file(&pdev->dev.kobj,
> > &acpi_attr_label.attr);
> > > + sysfs_create_file(&pdev->dev.kobj,
> > &acpi_attr_index.attr);
> > > + return 0;
> > > + }
> > > + return -1;
> > > +}
> > > +
> > > +static int
> > > +pci_remove_acpi_index_label_files(struct pci_dev *pdev)
> > > +{
> > > + if (acpi_attr_label.test && acpi_attr_label.test(&pdev-
> >dev,
> > NULL) > 0) {
> > > + sysfs_remove_file(&pdev->dev.kobj,
> > &acpi_attr_label.attr);
> > > + sysfs_remove_file(&pdev->dev.kobj,
> > &acpi_attr_index.attr);
> > > + return 0;
> > > + }
> > > + return -1;
> > > +}
> > > +
> > > +int pci_create_acpi_attr_files(struct pci_dev *pdev)
> > > +{
> > > + if (!pci_create_acpi_index_label_files(pdev))
> > > + return 0;
> > > + if (!pci_create_smbiosname_file(pdev))
> > > + return 0;
> > > + return -ENODEV;
> > > +}
> > > +EXPORT_SYMBOL(pci_create_acpi_attr_files);
> >
> > EXPORT_SYMBOL_GPL?
> >
> > Wait, why does this need to be exported at all? What module is ever
> > going to call this function?
> >
> > > +int pci_remove_acpi_attr_files(struct pci_dev *pdev)
> > > +{
> > > + if (!pci_remove_acpi_index_label_files(pdev))
> > > + return 0;
> > > + if (!pci_remove_smbiosname_file(pdev))
> > > + return 0;
> > > + return -ENODEV;
> > > +
> > > +}
> > > +EXPORT_SYMBOL(pci_remove_acpi_attr_files);
> >
> > Same here, what module will call this?
> >
>
> These functions need not be exported as they are not called by any
> module.
>
> > > +++ b/include/linux/pci-label.h
> >
> > As discussed above, this whole file does not need to exist.
> >
> > > +extern int pci_create_acpi_attr_files(struct pci_dev *pdev);
> > > +extern int pci_remove_acpi_attr_files(struct pci_dev *pdev);
> >
> > Just put these two functions in the drivers/pci/pci.h file.
> >
> Fixed.
>
> In addition to these changes there are a coulple of changes i have done
> -
>
> 1.Removed the check for network devices and evaulate _DSM for any pci
> device
> that has _DSM defined in adherence to the spec.
>
> 2.Renamed the functions pci_create,remove-acpi_attr_files to
> pci_create,remove_firmware_label_files.
>
> 3.Added checks for conditional compilation of if CONFIG_ACPI ||
> CONFIG_DMI
>
> Note: While testing the patch with CONFIG_ACPI set to no, the
> compilation
> would fail with the below message.
>
> CC drivers/pci/pci-label.o
> In file included from drivers/pci/pci-label.c:24:
> include/linux/pci-acpi.h:39: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or
> ‘__attribute__’
> before ‘acpi_find_root_bridge_handle’
>
> I had to add make this change to proceed with the compilation. It would
> be
> great to know if i am missing something in the way conditional
> compilation
> is implemented or is it a issue.
>
> ---
> include/linux/pci-acpi.h | 4 ++--
> 1 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/include/linux/pci-acpi.h b/include/linux/pci-acpi.h
> index c8b6473..bc40827 100644
> --- a/include/linux/pci-acpi.h
> +++ b/include/linux/pci-acpi.h
> @@ -36,8 +36,8 @@ static inline acpi_handle
> acpi_pci_get_bridge_handle(struct pci_bus *pbus)
> pbus->number);
> }
> #else
> -static inline acpi_handle acpi_find_root_bridge_handle(struct pci_dev
> *pdev)
> -{ return NULL; }
> +static inline void acpi_find_root_bridge_handle(struct pci_dev *pdev)
> +{ }
> #endif
>
> #endif /* _PCI_ACPI_H_ */
>
>
> Please find the patch with above suggestions and changes -
>
>
> From: Narendra K <narendra_k@...l.com>
> Subject: [PATCH V2 1/2] Export firmware assigned labels of pci devices
> to sysfs
>
> This patch exports the firmware assigned labels of pci devices to
> sysfs which could be used by user space.
>
> Signed-off-by: Jordan Hargrave <jordan_hargrave@...l.com>
> Signed-off-by: Narendra K <narendra_k@...l.com>
> ---
> drivers/firmware/dmi_scan.c | 24 ++++
> drivers/pci/Makefile | 2 +-
> drivers/pci/pci-label.c | 273
> +++++++++++++++++++++++++++++++++++++++++++
> drivers/pci/pci-sysfs.c | 5 +
> drivers/pci/pci.h | 2 +
> include/linux/dmi.h | 9 ++
> 6 files changed, 314 insertions(+), 1 deletions(-)
> create mode 100644 drivers/pci/pci-label.c
>
> diff --git a/drivers/firmware/dmi_scan.c b/drivers/firmware/dmi_scan.c
> index d464672..7d8439b 100644
> --- a/drivers/firmware/dmi_scan.c
> +++ b/drivers/firmware/dmi_scan.c
> @@ -277,6 +277,28 @@ static void __init dmi_save_ipmi_device(const
> struct dmi_header *dm)
> list_add_tail(&dev->list, &dmi_devices);
> }
>
> +static void __init dmi_save_devslot(int id, int seg, int bus, int
> devfn, const char *name)
> +{
> + struct dmi_devslot *slot;
> +
> + slot = dmi_alloc(sizeof(*slot) + strlen(name) + 1);
> + if (!slot) {
> + printk(KERN_ERR "dmi_save_devslot: out of memory.\n");
> + return;
> + }
> + slot->id = id;
> + slot->seg = seg;
> + slot->bus = bus;
> + slot->devfn = devfn;
> +
> + strcpy((char *)&slot[1], name);
> + slot->dev.type = DMI_DEV_TYPE_DEVSLOT;
> + slot->dev.name = (char *)&slot[1];
> + slot->dev.device_data = slot;
> +
> + list_add(&slot->dev.list, &dmi_devices);
> +}
> +
> static void __init dmi_save_extended_devices(const struct dmi_header
> *dm)
> {
> const u8 *d = (u8*) dm + 5;
> @@ -285,6 +307,7 @@ static void __init dmi_save_extended_devices(const
> struct dmi_header *dm)
> if ((*d & 0x80) == 0)
> return;
>
> + dmi_save_devslot(-1, *(u16 *)(d+2), *(d+4), *(d+5),
> dmi_string_nosave(dm, *(d-1)));
> dmi_save_one_device(*d & 0x7f, dmi_string_nosave(dm, *(d - 1)));
> }
>
> @@ -333,6 +356,7 @@ static void __init dmi_decode(const struct
> dmi_header *dm, void *dummy)
> break;
> case 41: /* Onboard Devices Extended Information */
> dmi_save_extended_devices(dm);
> + break;
> }
> }
>
> diff --git a/drivers/pci/Makefile b/drivers/pci/Makefile
> index 0b51857..69c503a 100644
> --- a/drivers/pci/Makefile
> +++ b/drivers/pci/Makefile
> @@ -4,7 +4,7 @@
>
> obj-y += access.o bus.o probe.o remove.o pci.o \
> pci-driver.o search.o pci-sysfs.o rom.o setup-res.o \
> - irq.o vpd.o
> + irq.o vpd.o pci-label.o
> obj-$(CONFIG_PROC_FS) += proc.o
> obj-$(CONFIG_SYSFS) += slot.o
>
> diff --git a/drivers/pci/pci-label.c b/drivers/pci/pci-label.c
> new file mode 100644
> index 0000000..b35d48c
> --- /dev/null
> +++ b/drivers/pci/pci-label.c
> @@ -0,0 +1,273 @@
> +/*
> + * Purpose: Export the firmware label associated with a pci network
> interface
> + * device to sysfs
> + * Copyright (C) 2010 Dell Inc.
> + * by Narendra K <Narendra_K@...l.com>, Jordan Hargrave
> <Jordan_Hargrave@...l.com>
> + *
> + * This code checks if the pci network device has a related ACPI _DSM.
> If
> + * available, the code calls the _DSM to retrieve the index and string
> and
> + * exports them to sysfs. If the ACPI _DSM is not available, it falls
> back on
> + * SMBIOS. SMBIOS defines type 41 for onboard pci devices. This code
> retrieves
> + * strings associated with the type 41 and exports it to sysfs.
> + *
> + * Please see http://linux.dell.com/wiki/index.php/Oss/libnetdevname
> for more
> + * information.
> + */
> +
> +#include <linux/dmi.h>
> +#include <linux/sysfs.h>
> +#include <linux/pci.h>
> +#include <linux/pci_ids.h>
> +#include <linux/module.h>
> +#include <linux/acpi.h>
> +#include <linux/pci-acpi.h>
> +#include <acpi/acpi_drivers.h>
> +#include <acpi/acpi_bus.h>
> +#include "pci.h"
> +
> +#define DEVICE_LABEL_DSM 0x07
> +
> +#if defined CONFIG_DMI
> +
> +struct smbios_attribute {
> + struct attribute attr;
> + ssize_t (*show) (struct device *dev, char *buf);
> + ssize_t (*test) (struct device *dev, char *buf);
> +};
> +
> +static ssize_t
> +smbiosname_string_exists(struct device *dev, char *buf)
> +{
> + struct pci_dev *pdev = to_pci_dev(dev);
> + const struct dmi_device *dmi;
> + struct dmi_devslot *dslot;
> + int bus;
> + int devfn;
> +
> + bus = pdev->bus->number;
> + devfn = pdev->devfn;
> +
> + dmi = NULL;
> + while ((dmi = dmi_find_device(DMI_DEV_TYPE_DEVSLOT, NULL, dmi))
> != NULL) {
> + dslot = dmi->device_data;
> + if (dslot && dslot->bus == bus && dslot->devfn == devfn) {
> + if (buf)
> + return scnprintf(buf, PAGE_SIZE, "%s\n",
> dmi->name);
> + return strlen(dmi->name);
> + }
> + }
> +
> + return 0;
> +}
> +
> +static ssize_t
> +smbiosname_show(struct device *dev, struct device_attribute *attr,
> char *buf)
> +{
> + return smbiosname_string_exists(dev, buf);
> +}
> +
> +struct smbios_attribute smbios_attr_label = {
> + .attr = {.name = "label", .mode = 0444, .owner = THIS_MODULE},
> + .show = smbiosname_show,
> + .test = smbiosname_string_exists,
> +};
> +
> +static int
> +pci_create_smbiosname_file(struct pci_dev *pdev)
> +{
> + if (smbios_attr_label.test && smbios_attr_label.test(&pdev->dev,
> NULL)) {
> + sysfs_create_file(&pdev->dev.kobj,
> &smbios_attr_label.attr);
> + return 0;
> + }
> + return -1;
> +}
> +
> +static int
> +pci_remove_smbiosname_file(struct pci_dev *pdev)
> +{
> + if (smbios_attr_label.test && smbios_attr_label.test(&pdev->dev,
> NULL)) {
> + sysfs_remove_file(&pdev->dev.kobj,
> &smbios_attr_label.attr);
> + return 0;
> + }
> + return -1;
> +}
> +#else
> +static inline int
> +pci_create_smbiosname_file(struct pci_dev *pdev)
> +{
> + return -1;
> +}
> +
> +static inline int
> +pci_remove_smbiosname_file(struct pci_dev *pdev)
> +{
> + return -1;
> +}
> +#endif
> +
> +#if defined CONFIG_ACPI
> +
> +static const char device_label_dsm_uuid[] = {
> + 0xD0, 0x37, 0xC9, 0xE5, 0x53, 0x35, 0x7A, 0x4D,
> + 0x91, 0x17, 0xEA, 0x4D, 0x19, 0xC3, 0x43, 0x4D
> +};
> +
> +struct acpi_attribute {
> + struct attribute attr;
> + ssize_t (*show) (struct device *dev, char *buf);
> + ssize_t (*test) (struct device *dev, char *buf);
> +};
> +
> +static int
> +dsm_get_label(acpi_handle handle, int func,
> + struct acpi_buffer *output,
> + char *buf, char *attribute)
> +{
> + struct acpi_object_list input;
> + union acpi_object params[4];
> + union acpi_object *obj;
> + int len = 0;
> +
> + int err;
> +
> + input.count = 4;
> + input.pointer = params;
> + params[0].type = ACPI_TYPE_BUFFER;
> + params[0].buffer.length = sizeof(device_label_dsm_uuid);
> + params[0].buffer.pointer = (char *)device_label_dsm_uuid;
> + params[1].type = ACPI_TYPE_INTEGER;
> + params[1].integer.value = 0x02;
> + params[2].type = ACPI_TYPE_INTEGER;
> + params[2].integer.value = func;
> + params[3].type = ACPI_TYPE_PACKAGE;
> + params[3].package.count = 0;
> + params[3].package.elements = NULL;
> +
> + err = acpi_evaluate_object(handle, "_DSM", &input, output);
> + if (err)
> + return -1;
> +
> +
> + obj = (union acpi_object *)output->pointer;
> +
> + switch (obj->type) {
> + case ACPI_TYPE_PACKAGE:
> + if (obj->package.count != 2)
> + break;
> + len = obj->package.elements[0].integer.value;
> + if (buf) {
> + if (!strncmp(attribute, "index", strlen(attribute)))
> + scnprintf(buf, PAGE_SIZE, "%lu\n",
> + obj->package.elements[0].integer.value);
> + else
> + scnprintf(buf, PAGE_SIZE, "%s\n",
> + obj->package.elements[1].string.pointer);
> + kfree(output->pointer);
> + return strlen(buf);
> + }
> + kfree(output->pointer);
> + return len;
> + break;
> + default:
> + kfree(output->pointer);
> + return -1;
> + }
> +}
> +
> +static ssize_t
> +acpi_index_string_exist(struct device *dev, char *buf, char
> *attribute)
> +{
> + struct pci_dev *pdev = to_pci_dev(dev);
> +
> + struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL};
> + acpi_handle handle;
> + int length;
> +
> + handle = DEVICE_ACPI_HANDLE(dev);
> +
> + if (!handle)
> + return -1;
> +
> + if ((length = dsm_get_label(handle, DEVICE_LABEL_DSM,
> + &output, buf, attribute)) < 0)
> + return -1;
> +
> + return length;
> +}
> +
> +static ssize_t
> +acpilabel_show(struct device *dev, struct device_attribute *attr, char
> *buf)
> +{
> + return acpi_index_string_exist(dev, buf, "label");
> +}
> +
> +static ssize_t
> +acpiindex_show(struct device *dev, struct device_attribute *attr, char
> *buf)
> +{
> + return acpi_index_string_exist(dev, buf, "index");
> +}
> +
> +struct acpi_attribute acpi_attr_label = {
> + .attr = {.name = "label", .mode = 0444, .owner = THIS_MODULE},
> + .show = acpilabel_show,
> + .test = acpi_index_string_exist,
> +};
> +
> +struct acpi_attribute acpi_attr_index = {
> + .attr = {.name = "index", .mode = 0444, .owner = THIS_MODULE},
> + .show = acpiindex_show,
> + .test = acpi_index_string_exist,
> +};
> +
> +static int
> +pci_create_acpi_index_label_files(struct pci_dev *pdev)
> +{
> + if (acpi_attr_label.test && acpi_attr_label.test(&pdev->dev,
> NULL) > 0) {
> + sysfs_create_file(&pdev->dev.kobj, &acpi_attr_label.attr);
> + sysfs_create_file(&pdev->dev.kobj, &acpi_attr_index.attr);
> + return 0;
> + }
> + return -1;
> +}
> +
> +static int
> +pci_remove_acpi_index_label_files(struct pci_dev *pdev)
> +{
> + if (acpi_attr_label.test && acpi_attr_label.test(&pdev->dev,
> NULL) > 0) {
> + sysfs_remove_file(&pdev->dev.kobj, &acpi_attr_label.attr);
> + sysfs_remove_file(&pdev->dev.kobj, &acpi_attr_index.attr);
> + return 0;
> + }
> + return -1;
> +}
> +#else
> +static inline int
> +pci_create_acpi_index_label_files(struct pci_dev *pdev)
> +{
> + return -1;
> +}
> +
> +static inline int
> +pci_remove_acpi_index_label_files(struct pci_dev *pdev)
> +{
> + return -1;
> +}
> +#endif
> +
> +int pci_create_firmware_label_files(struct pci_dev *pdev)
> +{
> + if (!pci_create_acpi_index_label_files(pdev))
> + return 0;
> + if (!pci_create_smbiosname_file(pdev))
> + return 0;
> + return -ENODEV;
> +}
> +
> +int pci_remove_firmware_label_files(struct pci_dev *pdev)
> +{
> + if (!pci_remove_acpi_index_label_files(pdev))
> + return 0;
> + if (!pci_remove_smbiosname_file(pdev))
> + return 0;
> + return -ENODEV;
> +}
> diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
> index fad9398..4ed517f 100644
> --- a/drivers/pci/pci-sysfs.c
> +++ b/drivers/pci/pci-sysfs.c
> @@ -1073,6 +1073,8 @@ int __must_check pci_create_sysfs_dev_files
> (struct pci_dev *pdev)
> if (retval)
> goto err_vga_file;
>
> + pci_create_firmware_label_files(pdev);
> +
> return 0;
>
> err_vga_file:
> @@ -1140,6 +1142,9 @@ void pci_remove_sysfs_dev_files(struct pci_dev
> *pdev)
> 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)
> diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
> index 4eb10f4..f223283 100644
> --- a/drivers/pci/pci.h
> +++ b/drivers/pci/pci.h
> @@ -11,6 +11,8 @@
> extern int pci_uevent(struct device *dev, struct kobj_uevent_env
> *env);
> extern int pci_create_sysfs_dev_files(struct pci_dev *pdev);
> extern void pci_remove_sysfs_dev_files(struct pci_dev *pdev);
> +extern int pci_create_firmware_label_files(struct pci_dev *pdev);
> +extern int pci_remove_firmware_label_files(struct pci_dev *pdev);
> extern void pci_cleanup_rom(struct pci_dev *dev);
> #ifdef HAVE_PCI_MMAP
> extern int pci_mmap_fits(struct pci_dev *pdev, int resno,
> diff --git a/include/linux/dmi.h b/include/linux/dmi.h
> index a8a3e1a..cc57c3a 100644
> --- a/include/linux/dmi.h
> +++ b/include/linux/dmi.h
> @@ -20,6 +20,7 @@ enum dmi_device_type {
> DMI_DEV_TYPE_SAS,
> DMI_DEV_TYPE_IPMI = -1,
> DMI_DEV_TYPE_OEM_STRING = -2,
> + DMI_DEV_TYPE_DEVSLOT = -3,
> };
>
> struct dmi_header {
> @@ -37,6 +38,14 @@ struct dmi_device {
>
> #ifdef CONFIG_DMI
>
> +struct dmi_devslot {
> + struct dmi_device dev;
> + int id;
> + int seg;
> + int bus;
> + int devfn;
> +};
> +
> extern int dmi_check_system(const struct dmi_system_id *list);
> const struct dmi_system_id *dmi_first_match(const struct dmi_system_id
> *list);
> extern const char * dmi_get_system_info(int field);
> --
> 1.6.5.2
>
> With regards,
> Narendra K
> --
> To unsubscribe from this list: send the line "unsubscribe netdev" in
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