[PATCH 06/12] PCI: Use for_each_pci_dev_resource helper

From: Yinghai Lu
Date: Tue Mar 13 2012 - 03:28:17 EST

Replace those open code, and make code more readable.

Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>
---
arch/x86/pci/common.c | 3 +-
arch/x86/pci/i386.c | 75 +++++++++++++++--------------------
arch/x86/pci/mrst.c | 7 ++-
drivers/pci/hotplug/acpiphp_glue.c | 4 +-
drivers/pci/hotplug/pciehp_hpc.c | 5 +-
drivers/pci/iov.c | 31 +++++++--------
drivers/pci/pci-driver.c | 6 ++-
drivers/pci/pci.c | 21 +++++-----
drivers/pci/probe.c | 6 ++-
drivers/pci/remove.c | 5 +-
drivers/pci/setup-bus.c | 28 ++++++--------
drivers/pci/setup-res.c | 14 +++----
drivers/pci/xen-pcifront.c | 4 +-
13 files changed, 96 insertions(+), 113 deletions(-)

diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c
index 0ec860f..7ea09f8 100644
--- a/arch/x86/pci/common.c
+++ b/arch/x86/pci/common.c
@@ -136,8 +136,7 @@ static void __devinit pcibios_fixup_device_resources(struct pci_dev *dev)
* resource so the kernel doesn't attmept to assign
* it later on in pci_assign_unassigned_resources
*/
- for (bar = 0; bar <= PCI_STD_RESOURCE_END; bar++) {
- bar_r = &dev->resource[bar];
+ for_each_pci_dev_base_norom_resource(dev, bar_r, bar) {
if (bar_r->start == 0 && bar_r->end != 0) {
bar_r->flags = 0;
bar_r->end = 0;
diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c
index 3e1dd0e..29c3e19 100644
--- a/arch/x86/pci/i386.c
+++ b/arch/x86/pci/i386.c
@@ -196,7 +196,7 @@ static void pcibios_allocate_bridge_resources(struct pci_dev *dev)
int idx;
struct resource *r;

- for (idx = PCI_BRIDGE_RESOURCES; idx < PCI_NUM_RESOURCES; idx++) {
+ for_each_pci_dev_bridge_resource(dev, r, idx) {
r = &dev->resource[idx];
if (!r->flags)
continue;
@@ -231,56 +231,45 @@ struct pci_check_idx_range {

static void pcibios_allocate_dev_resources(struct pci_dev *dev, int pass)
{
- int idx, disabled, i;
+ int idx, disabled;
u16 command;
struct resource *r;

- struct pci_check_idx_range idx_range[] = {
- { PCI_STD_RESOURCES, PCI_STD_RESOURCE_END },
-#ifdef CONFIG_PCI_IOV
- { PCI_IOV_RESOURCES, PCI_IOV_RESOURCE_END },
-#endif
- };
-
pci_read_config_word(dev, PCI_COMMAND, &command);
- for (i = 0; i < ARRAY_SIZE(idx_range); i++)
- for (idx = idx_range[i].start; idx <= idx_range[i].end; idx++) {
- r = &dev->resource[idx];
- if (r->parent) /* Already allocated */
- continue;
- if (!r->start) /* Address not assigned at all */
- continue;
- if (r->flags & IORESOURCE_IO)
- disabled = !(command & PCI_COMMAND_IO);
- else
- disabled = !(command & PCI_COMMAND_MEMORY);
- if (pass == disabled) {
- dev_dbg(&dev->dev,
- "BAR %d: reserving %pr (d=%d, p=%d)\n",
- idx, r, disabled, pass);
- if (pci_claim_resource(dev, idx) < 0) {
- /* We'll assign a new address later */
- pcibios_save_fw_addr(dev,
- idx, r->start);
- r->end -= r->start;
- r->start = 0;
- }
+ for_each_pci_dev_base_norom_resource(dev, r, idx) {
+ if (r->parent) /* Already allocated */
+ continue;
+ if (!r->start) /* Address not assigned at all */
+ continue;
+ if (r->flags & IORESOURCE_IO)
+ disabled = !(command & PCI_COMMAND_IO);
+ else
+ disabled = !(command & PCI_COMMAND_MEMORY);
+ if (pass == disabled) {
+ dev_dbg(&dev->dev,
+ "BAR %d: reserving %pr (d=%d, p=%d)\n",
+ idx, r, disabled, pass);
+ if (pci_claim_resource(dev, idx) < 0) {
+ /* We'll assign a new address later */
+ pcibios_save_fw_addr(dev, idx, r->start);
+ r->end -= r->start;
+ r->start = 0;
}
}
- if (!pass) {
- r = &dev->resource[PCI_ROM_RESOURCE];
- if (r->flags & IORESOURCE_ROM_ENABLE) {
- /* Turn the ROM off, leave the resource region,
- * but keep it unregistered. */
- u32 reg;
- dev_dbg(&dev->dev, "disabling ROM %pR\n", r);
- r->flags &= ~IORESOURCE_ROM_ENABLE;
- pci_read_config_dword(dev,
- dev->rom_base_reg, &reg);
- pci_write_config_dword(dev, dev->rom_base_reg,
+ }
+ if (!pass) {
+ r = &dev->resource[PCI_ROM_RESOURCE];
+ if (r->flags & IORESOURCE_ROM_ENABLE) {
+ /* Turn the ROM off, leave the resource region,
+ * but keep it unregistered. */
+ u32 reg;
+ dev_dbg(&dev->dev, "disabling ROM %pR\n", r);
+ r->flags &= ~IORESOURCE_ROM_ENABLE;
+ pci_read_config_dword(dev, dev->rom_base_reg, &reg);
+ pci_write_config_dword(dev, dev->rom_base_reg,
reg & ~PCI_ROM_ADDRESS_ENABLE);
- }
}
+ }
}

void pcibios_allocate_resources(struct pci_bus *bus, int pass)
diff --git a/arch/x86/pci/mrst.c b/arch/x86/pci/mrst.c
index 140942f..55e20d8 100644
--- a/arch/x86/pci/mrst.c
+++ b/arch/x86/pci/mrst.c
@@ -280,6 +280,7 @@ static void __devinit pci_fixed_bar_fixup(struct pci_dev *dev)
unsigned long offset;
u32 size;
int i;
+ struct resource *res;

if (!pci_soc_mode)
return;
@@ -294,10 +295,10 @@ static void __devinit pci_fixed_bar_fixup(struct pci_dev *dev)
PCI_DEVFN(2, 2) == dev->devfn)
return;

- for (i = 0; i < PCI_ROM_RESOURCE; i++) {
+ for_each_pci_dev_std_resource(dev, res, i) {
pci_read_config_dword(dev, offset + 8 + (i * 4), &size);
- dev->resource[i].end = dev->resource[i].start + size - 1;
- dev->resource[i].flags |= IORESOURCE_PCI_FIXED;
+ res->end = res->start + size - 1;
+ res->flags |= IORESOURCE_PCI_FIXED;
}
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_ANY_ID, pci_fixed_bar_fixup);
diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c
index 9f1a195..329d4fc 100644
--- a/drivers/pci/hotplug/acpiphp_glue.c
+++ b/drivers/pci/hotplug/acpiphp_glue.c
@@ -1024,10 +1024,10 @@ static void acpiphp_sanitize_bus(struct pci_bus *bus)
struct pci_dev *dev;
int i;
unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM;
+ struct resource *res;

list_for_each_entry(dev, &bus->devices, bus_list) {
- for (i=0; i<PCI_BRIDGE_RESOURCES; i++) {
- struct resource *res = &dev->resource[i];
+ for_each_pci_dev_nobridge_resource(dev, res, i) {
if ((res->flags & type_mask) && !res->start &&
res->end) {
/* Could not assign a required resources
diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c
index a960fae..ef10429 100644
--- a/drivers/pci/hotplug/pciehp_hpc.c
+++ b/drivers/pci/hotplug/pciehp_hpc.c
@@ -899,6 +899,7 @@ static inline void dbg_ctrl(struct controller *ctrl)
int i;
u16 reg16;
struct pci_dev *pdev = ctrl->pcie->port;
+ struct resource *res;

if (!pciehp_debug)
return;
@@ -914,11 +915,11 @@ static inline void dbg_ctrl(struct controller *ctrl)
pdev->subsystem_vendor);
ctrl_info(ctrl, " PCIe Cap offset : 0x%02x\n",
pci_pcie_cap(pdev));
- for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
+ for_each_pci_dev_all_resource(pdev, res, i) {
if (!pci_resource_len(pdev, i))
continue;
ctrl_info(ctrl, " PCI resource [%d] : %pR\n",
- i, &pdev->resource[i]);
+ i, res);
}
ctrl_info(ctrl, "Slot Capabilities : 0x%08x\n", ctrl->slot_cap);
ctrl_info(ctrl, " Physical Slot Number : %d\n", PSN(ctrl));
diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
index 6554e1a..f015764 100644
--- a/drivers/pci/iov.c
+++ b/drivers/pci/iov.c
@@ -99,17 +99,20 @@ static int virtfn_add(struct pci_dev *dev, int id, int reset)
pci_setup_device(virtfn);
virtfn->dev.parent = dev->dev.parent;

- for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) {
- res = dev->resource + PCI_IOV_RESOURCES + i;
+ for_each_pci_dev_iov_resource(dev, res, i) {
+ struct resource *virtfn_res;
+
if (!res->parent)
continue;
- virtfn->resource[i].name = pci_name(virtfn);
- virtfn->resource[i].flags = res->flags;
+
+ virtfn_res = pci_dev_resource_n(virtfn, i - PCI_IOV_RESOURCES);
+ virtfn_res->name = pci_name(virtfn);
+ virtfn_res->flags = res->flags;
size = resource_size(res);
do_div(size, iov->total);
- virtfn->resource[i].start = res->start + size * id;
- virtfn->resource[i].end = virtfn->resource[i].start + size - 1;
- rc = request_resource(res, &virtfn->resource[i]);
+ virtfn_res->start = res->start + size * id;
+ virtfn_res->end = virtfn_res->start + size - 1;
+ rc = request_resource(res, virtfn_res);
BUG_ON(rc);
}

@@ -313,9 +316,8 @@ static int sriov_enable(struct pci_dev *dev, int nr_virtfn)
return -EIO;

nres = 0;
- for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) {
- bars |= (1 << (i + PCI_IOV_RESOURCES));
- res = dev->resource + PCI_IOV_RESOURCES + i;
+ for_each_pci_dev_iov_resource(dev, res, i) {
+ bars |= 1 << i;
if (res->parent)
nres++;
}
@@ -473,10 +475,9 @@ found:
pci_write_config_dword(dev, pos + PCI_SRIOV_SYS_PGSIZE, pgsz);

nres = 0;
- for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) {
- res = dev->resource + PCI_IOV_RESOURCES + i;
+ for_each_pci_dev_iov_resource(dev, res, i) {
i += __pci_read_base(dev, pci_bar_unknown, res,
- pos + PCI_SRIOV_BAR + i * 4);
+ pos + PCI_SRIOV_BAR + (i - PCI_IOV_RESOURCES) * 4);
if (!res->flags)
continue;
if (resource_size(res) & (PAGE_SIZE - 1)) {
@@ -519,10 +520,8 @@ found:
return 0;

failed:
- for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) {
- res = dev->resource + PCI_IOV_RESOURCES + i;
+ for_each_pci_dev_iov_resource(dev, res, i)
res->flags = 0;
- }

return rc;
}
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 5d19695..a82c66f 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -1201,9 +1201,11 @@ pci_dev_driver(const struct pci_dev *dev)
if (dev->driver)
return dev->driver;
else {
+ struct resource *res;
int i;
- for(i=0; i<=PCI_ROM_RESOURCE; i++)
- if (dev->resource[i].flags & IORESOURCE_BUSY)
+
+ for_each_pci_dev_base_resource((struct pci_dev *)dev, res, i)
+ if (res->flags & IORESOURCE_BUSY)
return &pci_compat_driver;
}
return NULL;
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index af84abf..4512db6 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -483,8 +483,9 @@ static void
pci_restore_bars(struct pci_dev *dev)
{
int i;
+ struct resource *res;

- for (i = 0; i < PCI_BRIDGE_RESOURCES; i++)
+ for_each_pci_dev_nobridge_resource(dev, res, i)
pci_update_resource(dev, i);
}

@@ -1138,6 +1139,7 @@ static int __pci_enable_device_flags(struct pci_dev *dev,
{
int err;
int i, bars = 0;
+ struct resource *res;

/*
* Power state could be unknown at this point, either due to a fresh
@@ -1155,12 +1157,11 @@ static int __pci_enable_device_flags(struct pci_dev *dev,
return 0; /* already enabled */

/* only skip sriov related */
- for (i = 0; i <= PCI_ROM_RESOURCE; i++)
- if (dev->resource[i].flags & flags)
- bars |= (1 << i);
- for (i = PCI_BRIDGE_RESOURCES; i < DEVICE_COUNT_RESOURCE; i++)
- if (dev->resource[i].flags & flags)
+ for_each_pci_dev_noiov_resource(dev, res, i) {
+ /* TODO: check i with bits of bars */
+ if (res->flags & flags)
bars |= (1 << i);
+ }

err = do_pci_enable_device(dev, bars);
if (err < 0)
@@ -2462,7 +2463,7 @@ static int __pci_request_region(struct pci_dev *pdev, int bar, const char *res_n

err_out:
dev_warn(&pdev->dev, "BAR %d: can't reserve %pR\n", bar,
- &pdev->resource[bar]);
+ pci_dev_resource_n(pdev, bar));
return -EBUSY;
}

@@ -3721,8 +3722,7 @@ void pci_reassigndev_resource_alignment(struct pci_dev *dev)
command &= ~PCI_COMMAND_MEMORY;
pci_write_config_word(dev, PCI_COMMAND, command);

- for (i = 0; i < PCI_BRIDGE_RESOURCES; i++) {
- r = &dev->resource[i];
+ for_each_pci_dev_nobridge_resource(dev, r, i) {
if (!(r->flags & IORESOURCE_MEM))
continue;
size = resource_size(r);
@@ -3741,8 +3741,7 @@ void pci_reassigndev_resource_alignment(struct pci_dev *dev)
*/
if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE &&
(dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) {
- for (i = PCI_BRIDGE_RESOURCES; i < PCI_NUM_RESOURCES; i++) {
- r = &dev->resource[i];
+ for_each_pci_dev_bridge_resource(dev, r, i) {
if (!(r->flags & IORESOURCE_MEM))
continue;
r->end = resource_size(r) - 1;
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index dac829f..3143964 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -360,9 +360,11 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
static void pci_read_bases(struct pci_dev *dev, unsigned int howmany, int rom)
{
unsigned int pos, reg;
+ struct resource *res;

- for (pos = 0; pos < howmany; pos++) {
- struct resource *res = &dev->resource[pos];
+ for_each_pci_dev_std_resource(dev, res, pos) {
+ if (pos >= howmany)
+ break;
reg = PCI_BASE_ADDRESS_0 + (pos << 2);
pos += __pci_read_base(dev, pci_bar_unknown, res, reg);
}
diff --git a/drivers/pci/remove.c b/drivers/pci/remove.c
index 9ffc071..28c9fb8 100644
--- a/drivers/pci/remove.c
+++ b/drivers/pci/remove.c
@@ -6,15 +6,14 @@
static void pci_free_resources(struct pci_dev *dev)
{
int i;
+ struct resource *res;

msi_remove_pci_irq_vectors(dev);

pci_cleanup_rom(dev);
- for (i = 0; i < PCI_NUM_RESOURCES; i++) {
- struct resource *res = dev->resource + i;
+ for_each_pci_dev_all_resource(dev, res, i)
if (res->parent)
release_resource(res);
- }
}

static void pci_stop_dev(struct pci_dev *dev)
diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index 33f0fcd..8540155 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -106,7 +106,7 @@ static resource_size_t get_res_add_size(struct list_head *head,

list_for_each_entry(dev_res, head, list) {
if (dev_res->res == res) {
- int idx = res - &dev_res->dev->resource[0];
+ int idx = pci_dev_resource_idx(dev_res->dev, res);

dev_printk(KERN_DEBUG, &dev_res->dev->dev,
"res[%d]=%pR get_res_add_size add_size %llx\n",
@@ -124,15 +124,13 @@ static resource_size_t get_res_add_size(struct list_head *head,
static void pdev_sort_resources(struct pci_dev *dev, struct list_head *head)
{
int i;
+ struct resource *r;

- for (i = 0; i < PCI_NUM_RESOURCES; i++) {
- struct resource *r;
+ for_each_pci_dev_all_resource(dev, r, i) {
struct pci_dev_resource *dev_res, *tmp;
resource_size_t r_align;
struct list_head *n;

- r = &dev->resource[i];
-
if (r->flags & IORESOURCE_PCI_FIXED)
continue;

@@ -237,7 +235,7 @@ static void reassign_resources_sorted(struct list_head *realloc_head,
if (!found_match)/* just skip */
continue;

- idx = res - &add_res->dev->resource[0];
+ idx = pci_dev_resource_idx(add_res->dev, res);
add_size = add_res->add_size;
if (!resource_size(res)) {
res->start = add_res->start;
@@ -280,7 +278,7 @@ static void assign_requested_resources_sorted(struct list_head *head,

list_for_each_entry(dev_res, head, list) {
res = dev_res->res;
- idx = res - &dev_res->dev->resource[0];
+ idx = pci_dev_resource_idx(dev_res->dev, res);
if (resource_size(res) &&
pci_assign_resource(dev_res->dev, idx)) {
if (fail_head && !pci_is_root_bus(dev_res->dev->bus)) {
@@ -716,9 +714,9 @@ static void pbus_size_io(struct pci_bus *bus, resource_size_t min_size,

list_for_each_entry(dev, &bus->devices, bus_list) {
int i;
+ struct resource *r;

- for (i = 0; i < PCI_NUM_RESOURCES; i++) {
- struct resource *r = &dev->resource[i];
+ for_each_pci_dev_all_resource(dev, r, i) {
unsigned long r_size;

if (r->parent || !(r->flags & IORESOURCE_IO))
@@ -798,9 +796,9 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask,

list_for_each_entry(dev, &bus->devices, bus_list) {
int i;
+ struct resource *r;

- for (i = 0; i < PCI_NUM_RESOURCES; i++) {
- struct resource *r = &dev->resource[i];
+ for_each_pci_dev_all_resource(dev, r, i) {
resource_size_t r_size;

if (r->parent || (r->flags & mask) != type)
@@ -1140,9 +1138,7 @@ static void pci_bridge_release_resources(struct pci_bus *bus,
IORESOURCE_PREFETCH;

dev = bus->self;
- for (idx = PCI_BRIDGE_RESOURCES; idx <= PCI_BRIDGE_RESOURCE_END;
- idx++) {
- r = &dev->resource[idx];
+ for_each_pci_dev_bridge_resource(dev, r, idx) {
if ((r->flags & type_mask) != type)
continue;
if (!r->parent)
@@ -1313,9 +1309,9 @@ static void __init pci_realloc_detect(void)

for_each_pci_dev(dev) {
int i;
+ struct resource *r;

- for (i = PCI_IOV_RESOURCES; i <= PCI_IOV_RESOURCE_END; i++) {
- struct resource *r = &dev->resource[i];
+ for_each_pci_dev_iov_resource(dev, r, i) {

/* Not assigned, or rejected by kernel ? */
if (r->flags && !r->start) {
diff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c
index 48251e3..4c6c924 100644
--- a/drivers/pci/setup-res.c
+++ b/drivers/pci/setup-res.c
@@ -104,7 +104,7 @@ void pci_update_resource(struct pci_dev *dev, int resno)

int pci_claim_resource(struct pci_dev *dev, int resource)
{
- struct resource *res = &dev->resource[resource];
+ struct resource *res = pci_dev_resource_n(dev, resource);
struct resource *root, *conflict;

root = pci_find_parent_resource(dev, res);
@@ -142,7 +142,7 @@ void pci_disable_bridge_window(struct pci_dev *dev)
static int __pci_assign_resource(struct pci_bus *bus, struct pci_dev *dev,
int resno, resource_size_t size, resource_size_t align)
{
- struct resource *res = dev->resource + resno;
+ struct resource *res = pci_dev_resource_n(dev, resno);
resource_size_t min;
int ret;

@@ -220,7 +220,7 @@ static int pci_revert_fw_address(struct resource *res, struct pci_dev *dev,

static int _pci_assign_resource(struct pci_dev *dev, int resno, int size, resource_size_t min_align)
{
- struct resource *res = dev->resource + resno;
+ struct resource *res = pci_dev_resource_n(dev, resno);
struct pci_bus *bus;
int ret;
char *type;
@@ -253,7 +253,7 @@ static int _pci_assign_resource(struct pci_dev *dev, int resno, int size, resour
int pci_reassign_resource(struct pci_dev *dev, int resno, resource_size_t addsize,
resource_size_t min_align)
{
- struct resource *res = dev->resource + resno;
+ struct resource *res = pci_dev_resource_n(dev, resno);
resource_size_t new_size;
int ret;

@@ -277,7 +277,7 @@ int pci_reassign_resource(struct pci_dev *dev, int resno, resource_size_t addsiz

int pci_assign_resource(struct pci_dev *dev, int resno)
{
- struct resource *res = dev->resource + resno;
+ struct resource *res = pci_dev_resource_n(dev, resno);
resource_size_t align, size;
struct pci_bus *bus;
int ret;
@@ -319,12 +319,10 @@ int pci_enable_resources(struct pci_dev *dev, int mask)
pci_read_config_word(dev, PCI_COMMAND, &cmd);
old_cmd = cmd;

- for (i = 0; i < PCI_NUM_RESOURCES; i++) {
+ for_each_pci_dev_all_resource(dev, r, i) {
if (!(mask & (1 << i)))
continue;

- r = &dev->resource[i];
-
if (!(r->flags & (IORESOURCE_IO | IORESOURCE_MEM)))
continue;
if ((i == PCI_ROM_RESOURCE) &&
diff --git a/drivers/pci/xen-pcifront.c b/drivers/pci/xen-pcifront.c
index 9c43ab4..9ae41ba 100644
--- a/drivers/pci/xen-pcifront.c
+++ b/drivers/pci/xen-pcifront.c
@@ -393,9 +393,7 @@ static int pcifront_claim_resource(struct pci_dev *dev, void *data)
int i;
struct resource *r;

- for (i = 0; i < PCI_NUM_RESOURCES; i++) {
- r = &dev->resource[i];
-
+ for_each_pci_dev_all_resource(dev, r, i) {
if (!r->parent && r->start && r->flags) {
dev_info(&pdev->xdev->dev, "claiming resource %s/%d\n",
pci_name(dev), i);
--
1.7.7

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