From 9eff02e2042f96fb2aedd02e032eca1c5333d767 Mon Sep 17 00:00:00 2001 From: Jesse Barnes Date: Fri, 24 Oct 2008 10:32:33 -0700 Subject: PCI: check mmap range of /proc/bus/pci files too /proc/bus/pci allows you to mmap resource ranges too, so we should probably be checking to make sure the mapping is somewhat valid. Uses the same code as the recent sysfs mmap range checking patch from Linus. Acked-by: David Miller Signed-off-by: Jesse Barnes --- drivers/pci/proc.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) (limited to 'drivers/pci/proc.c') diff --git a/drivers/pci/proc.c b/drivers/pci/proc.c index e1098c302c4..7fb086d3961 100644 --- a/drivers/pci/proc.c +++ b/drivers/pci/proc.c @@ -252,11 +252,20 @@ static int proc_bus_pci_mmap(struct file *file, struct vm_area_struct *vma) const struct proc_dir_entry *dp = PDE(inode); struct pci_dev *dev = dp->data; struct pci_filp_private *fpriv = file->private_data; - int ret; + int i, ret; if (!capable(CAP_SYS_RAWIO)) return -EPERM; + /* Make sure the caller is mapping a real resource for this device */ + for (i = 0; i < PCI_ROM_RESOURCE; i++) { + if (pci_mmap_fits(dev, i, vma)) + break; + } + + if (i >= PCI_ROM_RESOURCE) + return -ENODEV; + ret = pci_mmap_page_range(dev, vma, fpriv->mmap_state, fpriv->write_combine); -- cgit v1.2.3-70-g09d2 From fde09c6d8f92de0c9f75698a75f0989f2234c517 Mon Sep 17 00:00:00 2001 From: Yu Zhao Date: Sat, 22 Nov 2008 02:39:32 +0800 Subject: PCI: define PCI resource names in an 'enum' This patch moves all definitions of the PCI resource names to an 'enum', and also replaces some hard-coded resource variables with symbol names. This change eases introduction of device specific resources. Reviewed-by: Bjorn Helgaas Signed-off-by: Yu Zhao Signed-off-by: Jesse Barnes --- drivers/pci/pci-sysfs.c | 4 +++- drivers/pci/probe.c | 2 +- drivers/pci/proc.c | 7 ++++--- include/linux/pci.h | 37 ++++++++++++++++++++++++------------- 4 files changed, 32 insertions(+), 18 deletions(-) (limited to 'drivers/pci/proc.c') diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index d2f1354fd18..ea54cedcdfc 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -102,11 +102,13 @@ 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 = 7; + 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]; diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 5dcf2b65e3f..e1cf5d50ed4 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -423,7 +423,7 @@ static struct pci_bus *pci_alloc_child_bus(struct pci_bus *parent, child->subordinate = 0xff; /* Set up default resource pointers and names.. */ - for (i = 0; i < 4; i++) { + for (i = 0; i < PCI_BRIDGE_RESOURCE_NUM; i++) { child->resource[i] = &bridge->resource[PCI_BRIDGE_RESOURCES+i]; child->resource[i]->name = child->name; } diff --git a/drivers/pci/proc.c b/drivers/pci/proc.c index 7fb086d3961..593bb844b8d 100644 --- a/drivers/pci/proc.c +++ b/drivers/pci/proc.c @@ -361,15 +361,16 @@ static int show_device(struct seq_file *m, void *v) dev->vendor, dev->device, dev->irq); - /* Here should be 7 and not PCI_NUM_RESOURCES as we need to preserve compatibility */ - for (i=0; i<7; i++) { + + /* only print standard and ROM resources to preserve compatibility */ + for (i = 0; i <= PCI_ROM_RESOURCE; i++) { resource_size_t start, end; pci_resource_to_user(dev, i, &dev->resource[i], &start, &end); seq_printf(m, "\t%16llx", (unsigned long long)(start | (dev->resource[i].flags & PCI_REGION_FLAG_MASK))); } - for (i=0; i<7; i++) { + for (i = 0; i <= PCI_ROM_RESOURCE; i++) { resource_size_t start, end; pci_resource_to_user(dev, i, &dev->resource[i], &start, &end); seq_printf(m, "\t%16llx", diff --git a/include/linux/pci.h b/include/linux/pci.h index c5e02f324e1..da1c22bab40 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -82,7 +82,30 @@ enum pci_mmap_state { #define PCI_DMA_FROMDEVICE 2 #define PCI_DMA_NONE 3 -#define DEVICE_COUNT_RESOURCE 12 +/* + * For PCI devices, the region numbers are assigned this way: + */ +enum { + /* #0-5: standard PCI resources */ + PCI_STD_RESOURCES, + PCI_STD_RESOURCE_END = 5, + + /* #6: expansion ROM resource */ + PCI_ROM_RESOURCE, + + /* resources assigned to buses behind the bridge */ +#define PCI_BRIDGE_RESOURCE_NUM 4 + + PCI_BRIDGE_RESOURCES, + PCI_BRIDGE_RESOURCE_END = PCI_BRIDGE_RESOURCES + + PCI_BRIDGE_RESOURCE_NUM - 1, + + /* total resources associated with a PCI device */ + PCI_NUM_RESOURCES, + + /* preserve this for compatibility */ + DEVICE_COUNT_RESOURCE +}; typedef int __bitwise pci_power_t; @@ -274,18 +297,6 @@ static inline void pci_add_saved_cap(struct pci_dev *pci_dev, hlist_add_head(&new_cap->next, &pci_dev->saved_cap_space); } -/* - * For PCI devices, the region numbers are assigned this way: - * - * 0-5 standard PCI regions - * 6 expansion ROM - * 7-10 bridges: address space assigned to buses behind the bridge - */ - -#define PCI_ROM_RESOURCE 6 -#define PCI_BRIDGE_RESOURCES 7 -#define PCI_NUM_RESOURCES 11 - #ifndef PCI_BUS_NUM_RESOURCES #define PCI_BUS_NUM_RESOURCES 16 #endif -- cgit v1.2.3-70-g09d2