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s390/pci: s390 specific PCI sysfs attributes

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Add some s390 specific sysfs attributes to the PCI device directory.
The following attributes are introduced:
- function_id (PCI function ID)
- function_handle (PCI function handle)
- pchid (PCI channel ID)
- pfgid (PCI function group ID aka PCI root complex)

Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Jan Glauber 2012-11-29 14:36:55 +01:00 committed by Martin Schwidefsky
parent 7441b0627e
commit 1e8da9566b
4 changed files with 97 additions and 1 deletions
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4
arch/s390/include/asm/pci.h
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@ -141,6 +141,10 @@ struct zpci_dev *get_zdev(struct pci_dev *);
struct zpci_dev *get_zdev_by_fid(u32);
bool zpci_fid_present(u32);
/* sysfs */
int zpci_sysfs_add_device(struct device *);
void zpci_sysfs_remove_device(struct device *);
/* DMA */
int zpci_dma_init(void);
void zpci_dma_exit(void);

2
arch/s390/pci/Makefile
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@ -3,4 +3,4 @@
#
obj-$(CONFIG_PCI) += pci.o pci_dma.o pci_clp.o pci_msi.o \
pci_event.o
pci_sysfs.o pci_event.o

6
arch/s390/pci/pci.c
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@ -628,6 +628,7 @@ static void zpci_remove_device(struct pci_dev *pdev)
dev_info(&pdev->dev, "Removing device %u\n", zdev->domain);
zdev->state = ZPCI_FN_STATE_CONFIGURED;
zpci_dma_exit_device(zdev);
zpci_sysfs_remove_device(&pdev->dev);
zpci_unmap_resources(pdev);
list_del(&zdev->entry); /* can be called from init */
zdev->pdev = NULL;
@ -676,6 +677,11 @@ void pcibios_disable_device(struct pci_dev *pdev)
pdev->sysdata = NULL;
}
int pcibios_add_platform_entries(struct pci_dev *pdev)
{
return zpci_sysfs_add_device(&pdev->dev);
}
int zpci_request_irq(unsigned int irq, irq_handler_t handler, void *data)
{
int msi_nr = irq_to_msi_nr(irq);

86
arch/s390/pci/pci_sysfs.c Normal file
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@ -0,0 +1,86 @@
/*
* Copyright IBM Corp. 2012
*
* Author(s):
* Jan Glauber <jang@linux.vnet.ibm.com>
*/
#define COMPONENT "zPCI"
#define pr_fmt(fmt) COMPONENT ": " fmt
#include <linux/kernel.h>
#include <linux/stat.h>
#include <linux/pci.h>
static ssize_t show_fid(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct zpci_dev *zdev = get_zdev(container_of(dev, struct pci_dev, dev));
sprintf(buf, "0x%08x\n", zdev->fid);
return strlen(buf);
}
static DEVICE_ATTR(function_id, S_IRUGO, show_fid, NULL);
static ssize_t show_fh(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct zpci_dev *zdev = get_zdev(container_of(dev, struct pci_dev, dev));
sprintf(buf, "0x%08x\n", zdev->fh);
return strlen(buf);
}
static DEVICE_ATTR(function_handle, S_IRUGO, show_fh, NULL);
static ssize_t show_pchid(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct zpci_dev *zdev = get_zdev(container_of(dev, struct pci_dev, dev));
sprintf(buf, "0x%04x\n", zdev->pchid);
return strlen(buf);
}
static DEVICE_ATTR(pchid, S_IRUGO, show_pchid, NULL);
static ssize_t show_pfgid(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct zpci_dev *zdev = get_zdev(container_of(dev, struct pci_dev, dev));
sprintf(buf, "0x%02x\n", zdev->pfgid);
return strlen(buf);
}
static DEVICE_ATTR(pfgid, S_IRUGO, show_pfgid, NULL);
static struct device_attribute *zpci_dev_attrs[] = {
&dev_attr_function_id,
&dev_attr_function_handle,
&dev_attr_pchid,
&dev_attr_pfgid,
NULL,
};
int zpci_sysfs_add_device(struct device *dev)
{
int i, rc = 0;
for (i = 0; zpci_dev_attrs[i]; i++) {
rc = device_create_file(dev, zpci_dev_attrs[i]);
if (rc)
goto error;
}
return 0;
error:
while (--i >= 0)
device_remove_file(dev, zpci_dev_attrs[i]);
return rc;
}
void zpci_sysfs_remove_device(struct device *dev)
{
int i;
for (i = 0; zpci_dev_attrs[i]; i++)
device_remove_file(dev, zpci_dev_attrs[i]);
}