#include <device/device.h>
#include <device/path.h>
#include <device/pci.h>
+#include <device/resource.h>
#include <string.h>
-
/**
- * See if a device structure already exists and if not allocate it
+ * @brief See if a device structure exists for path
+ *
* @param bus The bus to find the device on
* @param path The relative path from the bus to the appropriate device
- * @return pointer a device structure for the device on bus at path
+ * @return pointer to a device structure for the device on bus at path
+ * or 0/NULL if no device is found
*/
-device_t alloc_find_dev(struct bus *parent, struct device_path *path)
+device_t find_dev_path(struct bus *parent, struct device_path *path)
{
device_t child;
for(child = parent->children; child; child = child->sibling) {
if (path_eq(path, &child->path)) {
- return child;
+ break;
}
}
- return alloc_dev(parent, path);
+ return child;
+}
+
+/**
+ * @brief See if a device structure already exists and if not allocate it
+ *
+ * @param bus The bus to find the device on
+ * @param path The relative path from the bus to the appropriate device
+ * @return pointer to a device structure for the device on bus at path
+ */
+device_t alloc_find_dev(struct bus *parent, struct device_path *path)
+{
+ device_t child;
+ child = find_dev_path(parent, path);
+ if (!child) {
+ child = alloc_dev(parent, path);
+ }
+ return child;
}
/**
*/
struct device *dev_find_slot(unsigned int bus, unsigned int devfn)
{
- struct device *dev;
+ struct device *dev, *result;
+ result = 0;
for (dev = all_devices; dev; dev = dev->next) {
- if ((dev->bus->secondary == bus) &&
+ if ((dev->path.type == DEVICE_PATH_PCI) &&
+ (dev->bus->secondary == bus) &&
(dev->path.u.pci.devfn == devfn)) {
+ result = dev;
break;
}
}
- return dev;
+ return result;
}
/** Find a device of a given vendor and type
from = all_devices;
else
from = from->next;
- while (from && (from->vendor != vendor || from->device != device))
+ while (from && (from->vendor != vendor || from->device != device)) {
from = from->next;
+ }
return from;
}
from = all_devices;
else
from = from->next;
- while (from && from->class != class)
+ while (from && (from->class & 0xffffff00) != class)
from = from->next;
return from;
}
}
else {
switch(dev->path.type) {
+ case DEVICE_PATH_ROOT:
+ memcpy(buffer, "Root Device", 12);
+ break;
case DEVICE_PATH_PCI:
sprintf(buffer, "PCI: %02x:%02x.%01x",
dev->bus->secondary,
sprintf(buffer, "I2C: %02x",
dev->path.u.i2c.device);
break;
+ case DEVICE_PATH_APIC:
+ sprintf(buffer, "APIC: %02x",
+ dev->path.u.apic.apic_id);
+ break;
+ case DEVICE_PATH_PCI_DOMAIN:
+ sprintf(buffer, "PCI_DOMAIN: %04x",
+ dev->path.u.pci_domain.domain);
+ break;
+ case DEVICE_PATH_APIC_CLUSTER:
+ sprintf(buffer, "APIC_CLUSTER: %01x",
+ dev->path.u.apic_cluster.cluster);
+ break;
+ case DEVICE_PATH_CPU:
+ sprintf(buffer, "CPU: %02x", dev->path.u.cpu.id);
+ break;
+ case DEVICE_PATH_CPU_BUS:
+ sprintf(buffer, "CPU_BUS: %02x", dev->path.u.cpu_bus.id);
+ break;
default:
printk_err("Unknown device path type: %d\n", dev->path.type);
break;
switch(path1->type) {
case DEVICE_PATH_NONE:
break;
+ case DEVICE_PATH_ROOT:
+ equal = 1;
+ break;
case DEVICE_PATH_PCI:
- equal = path1->u.pci.devfn == path2->u.pci.devfn;
+ equal = (path1->u.pci.devfn == path2->u.pci.devfn);
break;
case DEVICE_PATH_PNP:
equal = (path1->u.pnp.port == path2->u.pnp.port) &&
case DEVICE_PATH_I2C:
equal = (path1->u.i2c.device == path2->u.i2c.device);
break;
+ case DEVICE_PATH_APIC:
+ equal = (path1->u.apic.apic_id == path2->u.apic.apic_id);
+ break;
+ case DEVICE_PATH_PCI_DOMAIN:
+ equal = (path1->u.pci_domain.domain == path2->u.pci_domain.domain);
+ break;
+ case DEVICE_PATH_APIC_CLUSTER:
+ equal = (path1->u.apic_cluster.cluster == path2->u.apic_cluster.cluster);
+ break;
+ case DEVICE_PATH_CPU:
+ equal = (path1->u.cpu.id == path2->u.cpu.id);
+ break;
+ case DEVICE_PATH_CPU_BUS:
+ equal = (path1->u.cpu_bus.id == path2->u.cpu_bus.id);
+ break;
default:
printk_err("Uknown device type: %d\n", path1->type);
break;
}
return equal;
}
+
+/**
+ * See if we have unused but allocated resource structures.
+ * If so remove the allocation.
+ * @param dev The device to find the resource on
+ */
+void compact_resources(device_t dev)
+{
+ struct resource *resource;
+ int i;
+ /* Move all of the free resources to the end */
+ for(i = 0; i < dev->resources;) {
+ resource = &dev->resource[i];
+ if (!resource->flags) {
+ memmove(resource, resource + 1, dev->resources - i);
+ dev->resources -= 1;
+ memset(&dev->resource[dev->resources], 0, sizeof(*resource));
+ } else {
+ i++;
+ }
+ }
+}
+
+
+/**
+ * See if a resource structure already exists for a given index
+ * @param dev The device to find the resource on
+ * @param index The index of the resource on the device.
+ * @return the resource if it already exists
+ */
+struct resource *probe_resource(device_t dev, unsigned index)
+{
+ struct resource *resource;
+ int i;
+ /* See if there is a resource with the appropriate index */
+ resource = 0;
+ for(i = 0; i < dev->resources; i++) {
+ if (dev->resource[i].index == index) {
+ resource = &dev->resource[i];
+ break;
+ }
+ }
+ return resource;
+}
+
+/**
+ * See if a resource structure already exists for a given index and if
+ * not allocate one. Then initialize the initialize the resource
+ * to default values.
+ * @param dev The device to find the resource on
+ * @param index The index of the resource on the device.
+ */
+struct resource *new_resource(device_t dev, unsigned index)
+{
+ struct resource *resource;
+
+ /* First move all of the free resources to the end */
+ compact_resources(dev);
+
+ /* See if there is a resource with the appropriate index */
+ resource = probe_resource(dev, index);
+ if (!resource) {
+ if (dev->resources == MAX_RESOURCES) {
+ die("MAX_RESOURCES exceeded.");
+ }
+ resource = &dev->resource[dev->resources];
+ memset(resource, 0, sizeof(*resource));
+ dev->resources++;
+ }
+ /* Initialize the resource values */
+ if (!(resource->flags & IORESOURCE_FIXED)) {
+ resource->flags = 0;
+ resource->base = 0;
+ }
+ resource->size = 0;
+ resource->limit = 0;
+ resource->index = index;
+ resource->align = 0;
+ resource->gran = 0;
+
+ return resource;
+}
+
+/**
+ * Return an existing resource structure for a given index.
+ * @param dev The device to find the resource on
+ * @param index The index of the resource on the device.
+ */
+struct resource *find_resource(device_t dev, unsigned index)
+{
+ struct resource *resource;
+
+ /* See if there is a resource with the appropriate index */
+ resource = probe_resource(dev, index);
+ if (!resource) {
+ printk_emerg("%s missing resource: %02x\n",
+ dev_path(dev), index);
+ die("");
+ }
+ return resource;
+}
+
+
+/**
+ * @brief round a number up to the next multiple of gran
+ * @param val the starting value
+ * @param gran granularity we are aligning the number to.
+ * @returns aligned value
+ */
+static resource_t align_up(resource_t val, unsigned long gran)
+{
+ resource_t mask;
+ mask = (1ULL << gran) - 1ULL;
+ val += mask;
+ val &= ~mask;
+ return val;
+}
+
+/**
+ * @brief round a number up to the previous multiple of gran
+ * @param val the starting value
+ * @param gran granularity we are aligning the number to.
+ * @returns aligned value
+ */
+static resource_t align_down(resource_t val, unsigned long gran)
+{
+ resource_t mask;
+ mask = (1ULL << gran) - 1ULL;
+ val &= ~mask;
+ return val;
+}
+
+/**
+ * @brief Compute the maximum address that is part of a resource
+ * @param resource the resource whose limit is desired
+ * @returns the end
+ */
+resource_t resource_end(struct resource *resource)
+{
+ resource_t base, end;
+ /* get the base address */
+ base = resource->base;
+
+ /* For a non bridge resource granularity and alignment are the same.
+ * For a bridge resource align is the largest needed alignment below
+ * the bridge. While the granularity is simply how many low bits of the
+ * address cannot be set.
+ */
+
+ /* Get the end (rounded up) */
+ end = base + align_up(resource->size, resource->gran) - 1;
+
+ return end;
+}
+
+/**
+ * @brief Compute the maximum legal value for resource->base
+ * @param resource the resource whose maximum is desired
+ * @returns the maximum
+ */
+resource_t resource_max(struct resource *resource)
+{
+ resource_t max;
+
+ max = align_down(resource->limit - resource->size + 1, resource->align);
+
+ return max;
+}
+
+/**
+ * @brief print the resource that was just stored.
+ * @param dev the device the stored resorce lives on
+ * @param resource the resource that was just stored.
+ */
+void report_resource_stored(device_t dev, struct resource *resource, const char *comment)
+{
+ if (resource->flags & IORESOURCE_STORED) {
+ unsigned char buf[10];
+ unsigned long long base, end;
+ base = resource->base;
+ end = resource_end(resource);
+ buf[0] = '\0';
+ if (resource->flags & IORESOURCE_PCI_BRIDGE) {
+ sprintf(buf, "bus %d ", dev->link[0].secondary);
+ }
+ printk_debug(
+ "%s %02x <- [0x%010Lx - 0x%010Lx] %s%s%s%s\n",
+ dev_path(dev),
+ resource->index,
+ base, end,
+ buf,
+ (resource->flags & IORESOURCE_PREFETCH) ? "pref" : "",
+ (resource->flags & IORESOURCE_IO)? "io":
+ (resource->flags & IORESOURCE_DRQ)? "drq":
+ (resource->flags & IORESOURCE_IRQ)? "irq":
+ (resource->flags & IORESOURCE_MEM)? "mem":
+ "????",
+ comment);
+ }
+}
+
+void search_bus_resources(struct bus *bus,
+ unsigned long type_mask, unsigned long type,
+ resource_search_t search, void *gp)
+{
+ struct device *curdev;
+ for(curdev = bus->children; curdev; curdev = curdev->sibling) {
+ int i;
+ /* Ignore disabled devices */
+ if (!curdev->have_resources) continue;
+ for(i = 0; i < curdev->resources; i++) {
+ struct resource *resource = &curdev->resource[i];
+ /* If it isn't the right kind of resource ignore it */
+ if ((resource->flags & type_mask) != type) {
+ continue;
+ }
+ /* If it is a subtractive resource recurse */
+ if (resource->flags & IORESOURCE_SUBTRACTIVE) {
+ struct bus * subbus;
+ subbus = &curdev->link[IOINDEX_SUBTRACTIVE_LINK(resource->index)];
+ search_bus_resources(subbus, type_mask, type, search, gp);
+ continue;
+ }
+ search(gp, curdev, resource);
+ }
+ }
+}
+
+void search_global_resources(
+ unsigned long type_mask, unsigned long type,
+ resource_search_t search, void *gp)
+{
+ struct device *curdev;
+ for(curdev = all_devices; curdev; curdev = curdev->next) {
+ int i;
+ /* Ignore disabled devices */
+ if (!curdev->have_resources) continue;
+ for(i = 0; i < curdev->resources; i++) {
+ struct resource *resource = &curdev->resource[i];
+ /* If it isn't the right kind of resource ignore it */
+ if ((resource->flags & type_mask) != type) {
+ continue;
+ }
+ /* If it is a subtractive resource ignore it */
+ if (resource->flags & IORESOURCE_SUBTRACTIVE) {
+ continue;
+ }
+ search(gp, curdev, resource);
+ }
+ }
+}
projects / coreboot.git / blobdiff