| #include <console/console.h> |
| #include <device/device.h> |
| #include <device/path.h> |
| #include <device/pci.h> |
| #include <device/resource.h> |
| #include <string.h> |
| |
| /** |
| * @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 to a device structure for the device on bus at path |
| * or 0/NULL if no device is found |
| */ |
| 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)) { |
| break; |
| } |
| } |
| 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; |
| } |
| |
| /** |
| * @brief Given a PCI bus and a devfn number, find the device structure |
| * |
| * @param bus The bus number |
| * @param devfn a device/function number |
| * @return pointer to the device structure |
| */ |
| struct device *dev_find_slot(unsigned int bus, unsigned int devfn) |
| { |
| struct device *dev, *result; |
| |
| result = 0; |
| for (dev = all_devices; dev; dev = dev->next) { |
| if ((dev->path.type == DEVICE_PATH_PCI) && |
| (dev->bus->secondary == bus) && |
| (dev->path.u.pci.devfn == devfn)) { |
| result = dev; |
| break; |
| } |
| } |
| return result; |
| } |
| |
| /** |
| * @brief Given a smbus bus and a device number, find the device structure |
| * |
| * @param bus The bus number |
| * @param addr a device number |
| * @return pointer to the device structure |
| */ |
| struct device *dev_find_slot_on_smbus(unsigned int bus, unsigned int addr) |
| { |
| struct device *dev, *result; |
| |
| result = 0; |
| for (dev = all_devices; dev; dev = dev->next) { |
| if ((dev->path.type == DEVICE_PATH_I2C) && |
| (dev->bus->secondary == bus) && |
| (dev->path.u.i2c.device == addr)) { |
| result = dev; |
| break; |
| } |
| } |
| return result; |
| } |
| |
| /** Find a device of a given vendor and type |
| * @param vendor Vendor ID (e.g. 0x8086 for Intel) |
| * @param device Device ID |
| * @param from Pointer to the device structure, used as a starting point |
| * in the linked list of all_devices, which can be 0 to start at the |
| * head of the list (i.e. all_devices) |
| * @return Pointer to the device struct |
| */ |
| struct device *dev_find_device(unsigned int vendor, unsigned int device, struct device *from) |
| { |
| if (!from) |
| from = all_devices; |
| else |
| from = from->next; |
| while (from && (from->vendor != vendor || from->device != device)) { |
| from = from->next; |
| } |
| return from; |
| } |
| |
| /** Find a device of a given class |
| * @param class Class of the device |
| * @param from Pointer to the device structure, used as a starting point |
| * in the linked list of all_devices, which can be 0 to start at the |
| * head of the list (i.e. all_devices) |
| * @return Pointer to the device struct |
| */ |
| struct device *dev_find_class(unsigned int class, struct device *from) |
| { |
| if (!from) |
| from = all_devices; |
| else |
| from = from->next; |
| while (from && (from->class & 0xffffff00) != class) |
| from = from->next; |
| return from; |
| } |
| |
| |
| const char *dev_path(device_t dev) |
| { |
| static char buffer[DEVICE_PATH_MAX]; |
| buffer[0] = '\0'; |
| if (!dev) { |
| memcpy(buffer, "<null>", 7); |
| } |
| 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, |
| PCI_SLOT(dev->path.u.pci.devfn), PCI_FUNC(dev->path.u.pci.devfn)); |
| break; |
| case DEVICE_PATH_PNP: |
| sprintf(buffer, "PNP: %04x.%01x", |
| dev->path.u.pnp.port, dev->path.u.pnp.device); |
| break; |
| case DEVICE_PATH_I2C: |
| sprintf(buffer, "I2C: %02x:%02x", |
| dev->bus->secondary, |
| 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; |
| } |
| } |
| return buffer; |
| } |
| |
| const char *bus_path(struct bus *bus) |
| { |
| static char buffer[BUS_PATH_MAX]; |
| sprintf(buffer, "%s,%d", |
| dev_path(bus->dev), bus->link); |
| return buffer; |
| } |
| |
| int path_eq(struct device_path *path1, struct device_path *path2) |
| { |
| int equal = 0; |
| if (path1->type == path2->type) { |
| 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); |
| break; |
| case DEVICE_PATH_PNP: |
| equal = (path1->u.pnp.port == path2->u.pnp.port) && |
| (path1->u.pnp.device == path2->u.pnp.device); |
| break; |
| 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 return the resource type of a resource |
| * @param resource the resource type to decode. |
| */ |
| const char *resource_type(struct resource *resource) |
| { |
| static char buffer[RESOURCE_TYPE_MAX]; |
| sprintf(buffer, "%s%s%s%s", |
| ((resource->flags & IORESOURCE_READONLY)? "ro": ""), |
| ((resource->flags & IORESOURCE_PREFETCH)? "pref":""), |
| ((resource->flags == 0)? "unused": |
| (resource->flags & IORESOURCE_IO)? "io": |
| (resource->flags & IORESOURCE_DRQ)? "drq": |
| (resource->flags & IORESOURCE_IRQ)? "irq": |
| (resource->flags & IORESOURCE_MEM)? "mem":"??????"), |
| ((resource->flags & IORESOURCE_PCI64)?"64":"")); |
| return buffer; |
| } |
| |
| /** |
| * @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\n", |
| dev_path(dev), |
| resource->index, |
| base, end, |
| buf, |
| resource_type(resource), |
| 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); |
| } |
| } |
| } |
| |
| void dev_set_enabled(device_t dev, int enable) |
| { |
| if (dev->enabled == enable) { |
| return; |
| } |
| dev->enabled = enable; |
| if (dev->ops && dev->ops->enable) { |
| dev->ops->enable(dev); |
| } |
| else if (dev->chip_ops && dev->chip_ops->enable_dev) { |
| dev->chip_ops->enable_dev(dev); |
| } |
| } |
| |
| void disable_children(struct bus *bus) |
| { |
| device_t child; |
| for(child = bus->children; child; child = child->sibling) { |
| int link; |
| for(link = 0; link < child->links; link++) { |
| disable_children(&child->link[link]); |
| } |
| dev_set_enabled(child, 0); |
| } |
| } |