lkml.org 
[lkml]   [2008]   [Nov]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    Date
    From
    Subject[PATCH 3/13 v7] 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.

    Signed-off-by: Yu Zhao <yu.zhao@intel.com>

    ---
    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(-)

    diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
    index 5d72866..0d74851 100644
    --- a/drivers/pci/pci-sysfs.c
    +++ b/drivers/pci/pci-sysfs.c
    @@ -101,11 +101,13 @@ 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 003a9b3..4c5429f 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 e1098c3..f6f2a59 100644
    --- a/drivers/pci/proc.c
    +++ b/drivers/pci/proc.c
    @@ -352,15 +352,16 @@ 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 7e7ff03..d455ec8 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;

    @@ -268,18 +291,6 @@ 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
    --
    1.5.6.4


    \
     
     \ /
      Last update: 2008-11-21 20:39    [W:0.025 / U:149.168 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site