*/
unsigned char pci_bus_max_busnr(struct pci_bus* bus)
{
- struct list_head *tmp;
+ struct pci_bus *tmp;
unsigned char max, n;
max = bus->busn_res.end;
- list_for_each(tmp, &bus->children) {
- n = pci_bus_max_busnr(pci_bus_b(tmp));
+ list_for_each_entry(tmp, &bus->children, node) {
+ n = pci_bus_max_busnr(tmp);
if(n > max)
max = n;
}
* @res: child resource record for which parent is sought
*
* For given resource region of given device, return the resource
- * region of parent bus the given region is contained in or where
- * it should be allocated from.
+ * region of parent bus the given region is contained in.
*/
struct resource *
pci_find_parent_resource(const struct pci_dev *dev, struct resource *res)
{
const struct pci_bus *bus = dev->bus;
+ struct resource *r;
int i;
- struct resource *best = NULL, *r;
pci_bus_for_each_resource(bus, r, i) {
if (!r)
continue;
- if (res->start && !(res->start >= r->start && res->end <= r->end))
- continue; /* Not contained */
- if ((res->flags ^ r->flags) & (IORESOURCE_IO | IORESOURCE_MEM))
- continue; /* Wrong type */
- if (!((res->flags ^ r->flags) & IORESOURCE_PREFETCH))
- return r; /* Exact match */
- /* We can't insert a non-prefetch resource inside a prefetchable parent .. */
- if (r->flags & IORESOURCE_PREFETCH)
- continue;
- /* .. but we can put a prefetchable resource inside a non-prefetchable one */
- if (!best)
- best = r;
+ if (res->start && resource_contains(r, res)) {
+
+ /*
+ * If the window is prefetchable but the BAR is
+ * not, the allocator made a mistake.
+ */
+ if (r->flags & IORESOURCE_PREFETCH &&
+ !(res->flags & IORESOURCE_PREFETCH))
+ return NULL;
+
+ /*
+ * If we're below a transparent bridge, there may
+ * be both a positively-decoded aperture and a
+ * subtractively-decoded region that contain the BAR.
+ * We want the positively-decoded one, so this depends
+ * on pci_bus_for_each_resource() giving us those
+ * first.
+ */
+ return r;
+ }
}
- return best;
+ return NULL;
}
/**
}
EXPORT_SYMBOL_GPL(pci_load_and_free_saved_state);
+int __weak pcibios_enable_device(struct pci_dev *dev, int bars)
+{
+ return pci_enable_resources(dev, bars);
+}
+
static int do_pci_enable_device(struct pci_dev *dev, int bars)
{
int err;
struct pci_pme_device *pme_dev, *n;
mutex_lock(&pci_pme_list_mutex);
- if (!list_empty(&pci_pme_list)) {
- list_for_each_entry_safe(pme_dev, n, &pci_pme_list, list) {
- if (pme_dev->dev->pme_poll) {
- struct pci_dev *bridge;
-
- bridge = pme_dev->dev->bus->self;
- /*
- * If bridge is in low power state, the
- * configuration space of subordinate devices
- * may be not accessible
- */
- if (bridge && bridge->current_state != PCI_D0)
- continue;
- pci_pme_wakeup(pme_dev->dev, NULL);
- } else {
- list_del(&pme_dev->list);
- kfree(pme_dev);
- }
+ list_for_each_entry_safe(pme_dev, n, &pci_pme_list, list) {
+ if (pme_dev->dev->pme_poll) {
+ struct pci_dev *bridge;
+
+ bridge = pme_dev->dev->bus->self;
+ /*
+ * If bridge is in low power state, the
+ * configuration space of subordinate devices
+ * may be not accessible
+ */
+ if (bridge && bridge->current_state != PCI_D0)
+ continue;
+ pci_pme_wakeup(pme_dev->dev, NULL);
+ } else {
+ list_del(&pme_dev->list);
+ kfree(pme_dev);
}
- if (!list_empty(&pci_pme_list))
- schedule_delayed_work(&pci_pme_work,
- msecs_to_jiffies(PME_TIMEOUT));
}
+ if (!list_empty(&pci_pme_list))
+ schedule_delayed_work(&pci_pme_work,
+ msecs_to_jiffies(PME_TIMEOUT));
mutex_unlock(&pci_pme_list_mutex);
}
}
/**
- * pci_enable_acs - enable ACS if hardware support it
+ * pci_std_enable_acs - enable ACS on devices using standard ACS capabilites
* @dev: the PCI device
*/
-void pci_enable_acs(struct pci_dev *dev)
+static int pci_std_enable_acs(struct pci_dev *dev)
{
int pos;
u16 cap;
u16 ctrl;
- if (!pci_acs_enable)
- return;
-
pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ACS);
if (!pos)
- return;
+ return -ENODEV;
pci_read_config_word(dev, pos + PCI_ACS_CAP, &cap);
pci_read_config_word(dev, pos + PCI_ACS_CTRL, &ctrl);
ctrl |= (cap & PCI_ACS_UF);
pci_write_config_word(dev, pos + PCI_ACS_CTRL, ctrl);
+
+ return 0;
+}
+
+/**
+ * pci_enable_acs - enable ACS if hardware support it
+ * @dev: the PCI device
+ */
+void pci_enable_acs(struct pci_dev *dev)
+{
+ if (!pci_acs_enable)
+ return;
+
+ if (!pci_std_enable_acs(dev))
+ return;
+
+ pci_dev_specific_enable_acs(dev);
}
static bool pci_acs_flags_enabled(struct pci_dev *pdev, u16 acs_flags)
"Rounding up size of resource #%d to %#llx.\n",
i, (unsigned long long)size);
}
+ r->flags |= IORESOURCE_UNSET;
r->end = size - 1;
r->start = 0;
}
r = &dev->resource[i];
if (!(r->flags & IORESOURCE_MEM))
continue;
+ r->flags |= IORESOURCE_UNSET;
r->end = resource_size(r) - 1;
r->start = 0;
}
projects / firefly-linux-kernel-4.4.55.git / blobdiff