diff options
Diffstat (limited to 'drivers/pci/hotplug/pciehprm_acpi.c')
| -rw-r--r-- | drivers/pci/hotplug/pciehprm_acpi.c | 1727 |
1 files changed, 122 insertions, 1605 deletions
diff --git a/drivers/pci/hotplug/pciehprm_acpi.c b/drivers/pci/hotplug/pciehprm_acpi.c index 1406db35b08..ae244e21862 100644 --- a/drivers/pci/hotplug/pciehprm_acpi.c +++ b/drivers/pci/hotplug/pciehprm_acpi.c @@ -24,100 +24,20 @@ * */ -#include <linux/config.h> #include <linux/module.h> #include <linux/kernel.h> #include <linux/types.h> #include <linux/pci.h> -#include <linux/init.h> #include <linux/acpi.h> -#include <linux/efi.h> #include <linux/pci-acpi.h> -#include <asm/uaccess.h> -#include <asm/system.h> -#ifdef CONFIG_IA64 -#include <asm/iosapic.h> -#endif -#include <acpi/acpi.h> #include <acpi/acpi_bus.h> #include <acpi/actypes.h> #include "pciehp.h" -#include "pciehprm.h" - -#define PCI_MAX_BUS 0x100 -#define ACPI_STA_DEVICE_PRESENT 0x01 #define METHOD_NAME__SUN "_SUN" #define METHOD_NAME__HPP "_HPP" #define METHOD_NAME_OSHP "OSHP" -/* Status code for running acpi method to gain native control */ -#define NC_NOT_RUN 0 -#define OSC_NOT_EXIST 1 -#define OSC_RUN_FAILED 2 -#define OSHP_NOT_EXIST 3 -#define OSHP_RUN_FAILED 4 -#define NC_RUN_SUCCESS 5 - -#define PHP_RES_BUS 0xA0 -#define PHP_RES_IO 0xA1 -#define PHP_RES_MEM 0xA2 -#define PHP_RES_PMEM 0xA3 - -#define BRIDGE_TYPE_P2P 0x00 -#define BRIDGE_TYPE_HOST 0x01 - -/* this should go to drivers/acpi/include/ */ -struct acpi__hpp { - u8 cache_line_size; - u8 latency_timer; - u8 enable_serr; - u8 enable_perr; -}; - -struct acpi_php_slot { - struct acpi_php_slot *next; - struct acpi_bridge *bridge; - acpi_handle handle; - int seg; - int bus; - int dev; - int fun; - u32 sun; - struct pci_resource *mem_head; - struct pci_resource *p_mem_head; - struct pci_resource *io_head; - struct pci_resource *bus_head; - void *slot_ops; /* _STA, _EJx, etc */ - struct slot *slot; -}; /* per func */ - -struct acpi_bridge { - struct acpi_bridge *parent; - struct acpi_bridge *next; - struct acpi_bridge *child; - acpi_handle handle; - int seg; - int pbus; /* pdev->bus->number */ - int pdevice; /* PCI_SLOT(pdev->devfn) */ - int pfunction; /* PCI_DEVFN(pdev->devfn) */ - int bus; /* pdev->subordinate->number */ - struct acpi__hpp *_hpp; - struct acpi_php_slot *slots; - struct pci_resource *tmem_head; /* total from crs */ - struct pci_resource *tp_mem_head; /* total from crs */ - struct pci_resource *tio_head; /* total from crs */ - struct pci_resource *tbus_head; /* total from crs */ - struct pci_resource *mem_head; /* available */ - struct pci_resource *p_mem_head; /* available */ - struct pci_resource *io_head; /* available */ - struct pci_resource *bus_head; /* available */ - int scanned; - int type; -}; - -static struct acpi_bridge *acpi_bridges_head; - static u8 * acpi_path_name( acpi_handle handle) { acpi_status status; @@ -133,85 +53,43 @@ static u8 * acpi_path_name( acpi_handle handle) return path_name; } -static void acpi_get__hpp ( struct acpi_bridge *ab); -static int acpi_run_oshp ( struct acpi_bridge *ab); -static int osc_run_status = NC_NOT_RUN; -static int oshp_run_status = NC_NOT_RUN; - -static int acpi_add_slot_to_php_slots( - struct acpi_bridge *ab, - int bus_num, - acpi_handle handle, - u32 adr, - u32 sun - ) -{ - struct acpi_php_slot *aps; - static long samesun = -1; - - aps = (struct acpi_php_slot *) kmalloc (sizeof(struct acpi_php_slot), GFP_KERNEL); - if (!aps) { - err ("acpi_pciehprm: alloc for aps fail\n"); - return -1; - } - memset(aps, 0, sizeof(struct acpi_php_slot)); - - aps->handle = handle; - aps->bus = bus_num; - aps->dev = (adr >> 16) & 0xffff; - aps->fun = adr & 0xffff; - aps->sun = sun; - - aps->next = ab->slots; /* cling to the bridge */ - aps->bridge = ab; - ab->slots = aps; - - ab->scanned += 1; - if (!ab->_hpp) - acpi_get__hpp(ab); - - if (osc_run_status == OSC_NOT_EXIST) - oshp_run_status = acpi_run_oshp(ab); - - if (sun != samesun) { - info("acpi_pciehprm: Slot sun(%x) at s:b:d:f=0x%02x:%02x:%02x:%02x\n", - aps->sun, ab->seg, aps->bus, aps->dev, aps->fun); - samesun = sun; - } - return 0; -} - -static void acpi_get__hpp ( struct acpi_bridge *ab) +static acpi_status +acpi_run_hpp(acpi_handle handle, struct hotplug_params *hpp) { acpi_status status; u8 nui[4]; struct acpi_buffer ret_buf = { 0, NULL}; union acpi_object *ext_obj, *package; - u8 *path_name = acpi_path_name(ab->handle); + u8 *path_name = acpi_path_name(handle); int i, len = 0; /* get _hpp */ - status = acpi_evaluate_object(ab->handle, METHOD_NAME__HPP, NULL, &ret_buf); + status = acpi_evaluate_object(handle, METHOD_NAME__HPP, NULL, &ret_buf); switch (status) { case AE_BUFFER_OVERFLOW: ret_buf.pointer = kmalloc (ret_buf.length, GFP_KERNEL); if (!ret_buf.pointer) { - err ("acpi_pciehprm:%s alloc for _HPP fail\n", path_name); - return; + err ("%s:%s alloc for _HPP fail\n", __FUNCTION__, + path_name); + return AE_NO_MEMORY; } - status = acpi_evaluate_object(ab->handle, METHOD_NAME__HPP, NULL, &ret_buf); + status = acpi_evaluate_object(handle, METHOD_NAME__HPP, + NULL, &ret_buf); if (ACPI_SUCCESS(status)) break; default: if (ACPI_FAILURE(status)) { - err("acpi_pciehprm:%s _HPP fail=0x%x\n", path_name, status); - return; + dbg("%s:%s _HPP fail=0x%x\n", __FUNCTION__, + path_name, status); + return status; } } ext_obj = (union acpi_object *) ret_buf.pointer; if (ext_obj->type != ACPI_TYPE_PACKAGE) { - err ("acpi_pciehprm:%s _HPP obj not a package\n", path_name); + err ("%s:%s _HPP obj not a package\n", __FUNCTION__, + path_name); + status = AE_ERROR; goto free_and_return; } @@ -224,1514 +102,153 @@ static void acpi_get__hpp ( struct acpi_bridge *ab) nui[i] = (u8)ext_obj->integer.value; break; default: - err ("acpi_pciehprm:%s _HPP obj type incorrect\n", path_name); + err ("%s:%s _HPP obj type incorrect\n", __FUNCTION__, + path_name); + status = AE_ERROR; goto free_and_return; } } - ab->_hpp = kmalloc (sizeof (struct acpi__hpp), GFP_KERNEL); - if (!ab->_hpp) { - err ("acpi_pciehprm:%s alloc for _HPP failed\n", path_name); - goto free_and_return; - } - memset(ab->_hpp, 0, sizeof(struct acpi__hpp)); + hpp->cache_line_size = nui[0]; + hpp->latency_timer = nui[1]; + hpp->enable_serr = nui[2]; + hpp->enable_perr = nui[3]; - ab->_hpp->cache_line_size = nui[0]; - ab->_hpp->latency_timer = nui[1]; - ab->_hpp->enable_serr = nui[2]; - ab->_hpp->enable_perr = nui[3]; - - dbg(" _HPP: cache_line_size=0x%x\n", ab->_hpp->cache_line_size); - dbg(" _HPP: latency timer =0x%x\n", ab->_hpp->latency_timer); - dbg(" _HPP: enable SERR =0x%x\n", ab->_hpp->enable_serr); - dbg(" _HPP: enable PERR =0x%x\n", ab->_hpp->enable_perr); + dbg(" _HPP: cache_line_size=0x%x\n", hpp->cache_line_size); + dbg(" _HPP: latency timer =0x%x\n", hpp->latency_timer); + dbg(" _HPP: enable SERR =0x%x\n", hpp->enable_serr); + dbg(" _HPP: enable PERR =0x%x\n", hpp->enable_perr); free_and_return: kfree(ret_buf.pointer); + return status; } -static int acpi_run_oshp ( struct acpi_bridge *ab) +static acpi_status acpi_run_oshp(acpi_handle handle) { acpi_status status; - u8 *path_name = acpi_path_name(ab->handle); + u8 *path_name = acpi_path_name(handle); /* run OSHP */ - status = acpi_evaluate_object(ab->handle, METHOD_NAME_OSHP, NULL, NULL); + status = acpi_evaluate_object(handle, METHOD_NAME_OSHP, NULL, NULL); if (ACPI_FAILURE(status)) { - err("acpi_pciehprm:%s OSHP fails=0x%x\n", path_name, status); - oshp_run_status = (status == AE_NOT_FOUND) ? OSHP_NOT_EXIST : OSHP_RUN_FAILED; + dbg("%s:%s OSHP fails=0x%x\n", __FUNCTION__, path_name, + status); } else { - oshp_run_status = NC_RUN_SUCCESS; - dbg("acpi_pciehprm:%s OSHP passes =0x%x\n", path_name, status); - dbg("acpi_pciehprm:%s oshp_run_status =0x%x\n", path_name, oshp_run_status); - } - return oshp_run_status; -} - -static acpi_status acpi_evaluate_crs( - acpi_handle handle, - struct acpi_resource **retbuf - ) -{ - acpi_status status; - struct acpi_buffer crsbuf; - u8 *path_name = acpi_path_name(handle); - - crsbuf.length = 0; - crsbuf.pointer = NULL; - - status = acpi_get_current_resources (handle, &crsbuf); - - switch (status) { - case AE_BUFFER_OVERFLOW: - break; /* found */ - case AE_NOT_FOUND: - dbg("acpi_pciehprm:%s _CRS not found\n", path_name); - return status; - default: - err ("acpi_pciehprm:%s _CRS fail=0x%x\n", path_name, status); - return status; + dbg("%s:%s OSHP passes\n", __FUNCTION__, path_name); } - - crsbuf.pointer = kmalloc (crsbuf.length, GFP_KERNEL); - if (!crsbuf.pointer) { - err ("acpi_pciehprm: alloc %ld bytes for %s _CRS fail\n", (ulong)crsbuf.length, path_name); - return AE_NO_MEMORY; - } - - status = acpi_get_current_resources (handle, &crsbuf); - if (ACPI_FAILURE(status)) { - err("acpi_pciehprm: %s _CRS fail=0x%x.\n", path_name, status); - kfree(crsbuf.pointer); - return status; - } - - *retbuf = crsbuf.pointer; - return status; } -static void free_pci_resource ( struct pci_resource *aprh) +static int is_root_bridge(acpi_handle handle) { - struct pci_resource *res, *next; + acpi_status status; + struct acpi_device_info *info; + struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; + int i; - for (res = aprh; res; res = next) { - next = res->next; - kfree(res); - } -} - -static void print_pci_resource ( struct pci_resource *aprh) -{ - struct pci_resource *res; - - for (res = aprh; res; res = res->next) - dbg(" base= 0x%x length= 0x%x\n", res->base, res->length); -} - -static void print_slot_resources( struct acpi_php_slot *aps) -{ - if (aps->bus_head) { - dbg(" BUS Resources:\n"); - print_pci_resource (aps->bus_head); - } - - if (aps->io_head) { - dbg(" IO Resources:\n"); - print_pci_resource (aps->io_head); - } - - if (aps->mem_head) { - dbg(" MEM Resources:\n"); - print_pci_resource (aps->mem_head); - } - - if (aps->p_mem_head) { - dbg(" PMEM Resources:\n"); - print_pci_resource (aps->p_mem_head); - } -} - -static void print_pci_resources( struct acpi_bridge *ab) -{ - if (ab->tbus_head) { - dbg(" Total BUS Resources:\n"); - print_pci_resource (ab->tbus_head); - } - if (ab->bus_head) { - dbg(" BUS Resources:\n"); - print_pci_resource (ab->bus_head); - } - - if (ab->tio_head) { - dbg(" Total IO Resources:\n"); - print_pci_resource (ab->tio_head); - } - if (ab->io_head) { - dbg(" IO Resources:\n"); - print_pci_resource (ab->io_head); - } - - if (ab->tmem_head) { - dbg(" Total MEM Resources:\n"); - print_pci_resource (ab->tmem_head); - } - if (ab->mem_head) { - dbg(" MEM Resources:\n"); - print_pci_resource (ab->mem_head); - } - - if (ab->tp_mem_head) { - dbg(" Total PMEM Resources:\n"); - print_pci_resource (ab->tp_mem_head); - } - if (ab->p_mem_head) { - dbg(" PMEM Resources:\n"); - print_pci_resource (ab->p_mem_head); - } - if (ab->_hpp) { - dbg(" _HPP: cache_line_size=0x%x\n", ab->_hpp->cache_line_size); - dbg(" _HPP: latency timer =0x%x\n", ab->_hpp->latency_timer); - dbg(" _HPP: enable SERR =0x%x\n", ab->_hpp->enable_serr); - dbg(" _HPP: enable PERR =0x%x\n", ab->_hpp->enable_perr); - } -} - -static int pciehprm_delete_resource( - struct pci_resource **aprh, - ulong base, - ulong size) -{ - struct pci_resource *res; - struct pci_resource *prevnode; - struct pci_resource *split_node; - ulong tbase; - - pciehp_resource_sort_and_combine(aprh); - - for (res = *aprh; res; res = res->next) { - if (res->base > base) - continue; - - if ((res->base + res->length) < (base + size)) - continue; - - if (res->base < base) { - tbase = base; - - if ((res->length - (tbase - res->base)) < size) - continue; - - split_node = (struct pci_resource *) kmalloc(sizeof(struct pci_resource), GFP_KERNEL); - if (!split_node) - return -ENOMEM; - - split_node->base = res->base; - split_node->length = tbase - res->base; - res->base = tbase; - res->length -= split_node->length; - - split_node->next = res->next; - res->next = split_node; - } - - if (res->length >= size) { - split_node = (struct pci_resource*) kmalloc(sizeof(struct pci_resource), GFP_KERNEL); - if (!split_node) - return -ENOMEM; - - split_node->base = res->base + size; - split_node->length = res->length - size; - res->length = size; - - split_node->next = res->next; - res->next = split_node; - } - - if (*aprh == res) { - *aprh = res->next; - } else { - prevnode = *aprh; - while (prevnode->next != res) - prevnode = prevnode->next; - - prevnode->next = res->next; - } - res->next = NULL; - kfree(res); - break; - } - - return 0; -} - -static int pciehprm_delete_resources( - struct pci_resource **aprh, - struct pci_resource *this - ) -{ - struct pci_resource *res; - - for (res = this; res; res = res->next) - pciehprm_delete_resource(aprh, res->base, res->length); - - return 0; -} - -static int pciehprm_add_resource( - struct pci_resource **aprh, - ulong base, - ulong size) -{ - struct pci_resource *res; - - for (res = *aprh; res; res = res->next) { - if ((res->base + res->length) == base) { - res->length += size; - size = 0L; - break; + status = acpi_get_object_info(handle, &buffer); + if (ACPI_SUCCESS(status)) { + info = buffer.pointer; + if ((info->valid & ACPI_VALID_HID) && + !strcmp(PCI_ROOT_HID_STRING, + info->hardware_id.value)) { + acpi_os_free(buffer.pointer); + return 1; + } + if (info->valid & ACPI_VALID_CID) { + for (i=0; i < info->compatibility_id.count; i++) { + if (!strcmp(PCI_ROOT_HID_STRING, + info->compatibility_id.id[i].value)) { + acpi_os_free(buffer.pointer); + return 1; + } + } } - if (res->next == *aprh) - break; } - - if (size) { - res = kmalloc(sizeof(struct pci_resource), GFP_KERNEL); - if (!res) { - err ("acpi_pciehprm: alloc for res fail\n"); - return -ENOMEM; - } - memset(res, 0, sizeof (struct pci_resource)); - - res->base = base; - res->length = size; - res->next = *aprh; - *aprh = res; - } - return 0; } -static int pciehprm_add_resources( - struct pci_resource **aprh, - struct pci_resource *this - ) -{ - struct pci_resource *res; - int rc = 0; - - for (res = this; res && !rc; res = res->next) - rc = pciehprm_add_resource(aprh, res->base, res->length); - - return rc; -} - -static void acpi_parse_io ( - struct acpi_bridge *ab, - union acpi_resource_data *data - ) +int pciehp_get_hp_hw_control_from_firmware(struct pci_dev *dev) { - struct acpi_resource_io *dataio; - dataio = (struct acpi_resource_io *) data; - - dbg("Io Resource\n"); - dbg(" %d bit decode\n", ACPI_DECODE_16 == dataio->io_decode ? 16:10); - dbg(" Range minimum base: %08X\n", dataio->min_base_address); - dbg(" Range maximum base: %08X\n", dataio->max_base_address); - dbg(" Alignment: %08X\n", dataio->alignment); - dbg(" Range Length: %08X\n", dataio->range_length); -} - -static void acpi_parse_fixed_io ( - struct acpi_bridge *ab, - union acpi_resource_data *data - ) -{ - struct acpi_resource_fixed_io *datafio; - datafio = (struct acpi_resource_fixed_io *) data; - - dbg("Fixed Io Resource\n"); - dbg(" Range base address: %08X", datafio->base_address); - dbg(" Range length: %08X", datafio->range_length); -} - -static void acpi_parse_address16_32 ( - struct acpi_bridge *ab, - union acpi_resource_data *data, - acpi_resource_type id - ) -{ - /* - * acpi_resource_address16 == acpi_resource_address32 - * acpi_resource_address16 *data16 = (acpi_resource_address16 *) data; + acpi_status status; + acpi_handle chandle, handle = DEVICE_ACPI_HANDLE(&(dev->dev)); + struct pci_dev *pdev = dev; + u8 *path_name; + /* + * Per PCI firmware specification, we should run the ACPI _OSC + * method to get control of hotplug hardware before using it. + * If an _OSC is missing, we look for an OSHP to do the same thing. + * To handle different BIOS behavior, we look for _OSC and OSHP + * within the scope of the hotplug controller and its parents, upto + * the host bridge under which this controller exists. */ - struct acpi_resource_address32 *data32 = (struct acpi_resource_address32 *) data; - struct pci_resource **aprh, **tprh; - - if (id == ACPI_RSTYPE_ADDRESS16) - dbg("acpi_pciehprm:16-Bit Address Space Resource\n"); - else - dbg("acpi_pciehprm:32-Bit Address Space Resource\n"); - - switch (data32->resource_type) { - case ACPI_MEMORY_RANGE: - dbg(" Resource Type: Memory Range\n"); - aprh = &ab->mem_head; - tprh = &ab->tmem_head; - - switch (data32->attribute.memory.cache_attribute) { - case ACPI_NON_CACHEABLE_MEMORY: - dbg(" Type Specific: Noncacheable memory\n"); - break; - case ACPI_CACHABLE_MEMORY: - dbg(" Type Specific: Cacheable memory\n"); - break; - case ACPI_WRITE_COMBINING_MEMORY: - dbg(" Type Specific: Write-combining memory\n"); - break; - case ACPI_PREFETCHABLE_MEMORY: - aprh = &ab->p_mem_head; - dbg(" Type Specific: Prefetchable memory\n"); - break; - default: - dbg(" Type Specific: Invalid cache attribute\n"); + while (!handle) { + /* + * This hotplug controller was not listed in the ACPI name + * space at all. Try to get acpi handle of parent pci bus. + */ + if (!pdev || !pdev->bus->parent) break; - } - - dbg(" Type Specific: Read%s\n", ACPI_READ_WRITE_MEMORY == data32->attribute.memory.read_write_attribute ? "/Write":" Only"); - break; - - case ACPI_IO_RANGE: - dbg(" Resource Type: I/O Range\n"); - aprh = &ab->io_head; - tprh = &ab->tio_head; - - switch (data32->attribute.io.range_attribute) { - case ACPI_NON_ISA_ONLY_RANGES: - dbg(" Type Specific: Non-ISA Io Addresses\n"); - break; - case ACPI_ISA_ONLY_RANGES: - dbg(" Type Specific: ISA Io Addresses\n"); - break; - case ACPI_ENTIRE_RANGE: - dbg(" Type Specific: ISA and non-ISA Io Addresses\n"); - break; - default: - dbg(" Type Specific: Invalid range attribute\n"); + dbg("Could not find %s in acpi namespace, trying parent\n", + pci_name(pdev)); + if (!pdev->bus->parent->self) + /* Parent must be a host bridge */ + handle = acpi_get_pci_rootbridge_handle( + pci_domain_nr(pdev->bus->parent), + pdev->bus->parent->number); + else + handle = DEVICE_ACPI_HANDLE( + &(pdev->bus->parent->self->dev)); + pdev = pdev->bus->parent->self; + } + + while (handle) { + path_name = acpi_path_name(handle); + dbg("Trying to get hotplug control for %s \n", path_name); + status = pci_osc_control_set(handle, + OSC_PCI_EXPRESS_NATIVE_HP_CONTROL); + if (status == AE_NOT_FOUND) + status = acpi_run_oshp(handle); + if (ACPI_SUCCESS(status)) { + dbg("Gained control for hotplug HW for pci %s (%s)\n", + pci_name(dev), path_name); + return 0; + } + if (is_root_bridge(handle)) break; - } - break; - - case ACPI_BUS_NUMBER_RANGE: - dbg(" Resource Type: Bus Number Range(fixed)\n"); - /* fixup to be compatible with the rest of php driver */ - data32->min_address_range++; - data32->address_length--; - aprh = &ab->bus_head; - tprh = &ab->tbus_head; - break; - default: - dbg(" Resource Type: Invalid resource type. Exiting.\n"); - return; - } - - dbg(" Resource %s\n", ACPI_CONSUMER == data32->producer_consumer ? "Consumer":"Producer"); - dbg(" %s decode\n", ACPI_SUB_DECODE == data32->decode ? "Subtractive":"Positive"); - dbg(" Min address is %s fixed\n", ACPI_ADDRESS_FIXED == data32->min_address_fixed ? "":"not"); - dbg(" Max address is %s fixed\n", ACPI_ADDRESS_FIXED == data32->max_address_fixed ? "":"not"); - dbg(" Granularity: %08X\n", data32->granularity); - dbg(" Address range min: %08X\n", data32->min_address_range); - dbg(" Address range max: %08X\n", data32->max_address_range); - dbg(" Address translation offset: %08X\n", data32->address_translation_offset); - dbg(" Address Length: %08X\n", data32->address_length); - - if (0xFF != data32->resource_source.index) { - dbg(" Resource Source Index: %X\n", data32->resource_source.index); - /* dbg(" Resource Source: %s\n", data32->resource_source.string_ptr); */ - } - - pciehprm_add_resource(aprh, data32->min_address_range, data32->address_length); -} - -static acpi_status acpi_parse_crs( - struct acpi_bridge *ab, - struct acpi_resource *crsbuf - ) -{ - acpi_status status = AE_OK; - struct acpi_resource *resource = crsbuf; - u8 count = 0; - u8 done = 0; - - while (!done) { - dbg("acpi_pciehprm: PCI bus 0x%x Resource structure %x.\n", ab->bus, count++); - switch (resource->id) { - case ACPI_RSTYPE_IRQ: - dbg("Irq -------- Resource\n"); - break; - case ACPI_RSTYPE_DMA: - dbg("DMA -------- Resource\n"); - break; - case ACPI_RSTYPE_START_DPF: - dbg("Start DPF -------- Resource\n"); - break; - case ACPI_RSTYPE_END_DPF: - dbg("End DPF -------- Resource\n"); - break; - case ACPI_RSTYPE_IO: - acpi_parse_io (ab, &resource->data); - break; - case ACPI_RSTYPE_FIXED_IO: - acpi_parse_fixed_io (ab, &resource->data); - break; - case ACPI_RSTYPE_VENDOR: - dbg("Vendor -------- Resource\n"); - break; - case ACPI_RSTYPE_END_TAG: - dbg("End_tag -------- Resource\n"); - done = 1; - break; - case ACPI_RSTYPE_MEM24: - dbg("Mem24 -------- Resource\n"); - break; - case ACPI_RSTYPE_MEM32: - dbg("Mem32 -------- Resource\n"); - break; - case ACPI_RSTYPE_FIXED_MEM32: - dbg("Fixed Mem32 -------- Resource\n"); - break; - case ACPI_RSTYPE_ADDRESS16: - acpi_parse_address16_32(ab, &resource->data, ACPI_RSTYPE_ADDRESS16); - break; - case ACPI_RSTYPE_ADDRESS32: - acpi_parse_address16_32(ab, &resource->data, ACPI_RSTYPE_ADDRESS32); - break; - case ACPI_RSTYPE_ADDRESS64: - info("Address64 -------- Resource unparsed\n"); - break; - case ACPI_RSTYPE_EXT_IRQ: - dbg("Ext Irq -------- Resource\n"); - break; - default: - dbg("Invalid -------- resource type 0x%x\n", resource->id); - break; - } - - resource = (struct acpi_resource *) ((char *)resource + resource->length); - } - - return status; -} - -static acpi_status acpi_get_crs( struct acpi_bridge *ab) -{ - acpi_status status; - struct acpi_resource *crsbuf; - - status = acpi_evaluate_crs(ab->handle, &crsbuf); - if (ACPI_SUCCESS(status)) { - status = acpi_parse_crs(ab, crsbuf); - kfree(crsbuf); - - pciehp_resource_sort_and_combine(&ab->bus_head); - pciehp_resource_sort_and_combine(&ab->io_head); - pciehp_resource_sort_and_combine(&ab->mem_head); - pciehp_resource_sort_and_combine(&ab->p_mem_head); - - pciehprm_add_resources (&ab->tbus_head, ab->bus_head); - pciehprm_add_resources (&ab->tio_head, ab->io_head); - pciehprm_add_resources (&ab->tmem_head, ab->mem_head); - pciehprm_add_resources (&ab->tp_mem_head, ab->p_mem_head); - } - - return status; -} - -/* find acpi_bridge downword from ab. */ -static struct acpi_bridge * -find_acpi_bridge_by_bus( - struct acpi_bridge *ab, - int seg, - int bus /* pdev->subordinate->number */ - ) -{ - struct acpi_bridge *lab = NULL; - - if (!ab) - return NULL; - - if ((ab->bus == bus) && (ab->seg == seg)) - return ab; - - if (ab->child) - lab = find_acpi_bridge_by_bus(ab->child, seg, bus); - - if (!lab) - if (ab->next) - lab = find_acpi_bridge_by_bus(ab->next, seg, bus); - - return lab; -} - -/* - * Build a device tree of ACPI PCI Bridges - */ -static void pciehprm_acpi_register_a_bridge ( - struct acpi_bridge **head, - struct acpi_bridge *pab, /* parent bridge to which child bridge is added */ - struct acpi_bridge *cab /* child bridge to add */ - ) -{ - struct acpi_bridge *lpab; - struct acpi_bridge *lcab; - - lpab = find_acpi_bridge_by_bus(*head, pab->seg, pab->bus); - if (!lpab) { - if (!(pab->type & BRIDGE_TYPE_HOST)) - warn("PCI parent bridge s:b(%x:%x) not in list.\n", pab->seg, pab->bus); - pab->next = *head; - *head = pab; - lpab = pab; - } - - if ((cab->type & BRIDGE_TYPE_HOST) && (pab == cab)) - return; - - lcab = find_acpi_bridge_by_bus(*head, cab->seg, cab->bus); - if (lcab) { - if ((pab->bus != lcab->parent->bus) || (lcab->bus != cab->bus)) - err("PCI child bridge s:b(%x:%x) in list with diff parent.\n", cab->seg, cab->bus); - return; - } else - lcab = cab; - - lcab->parent = lpab; - lcab->next = lpab->child; - lpab->child = lcab; -} - -static acpi_status pciehprm_acpi_build_php_slots_callback( - acpi_handle handle, - u32 Level, - void *context, - void **retval - ) -{ - ulong bus_num; - ulong seg_num; - ulong sun, adr; - ulong padr = 0; - acpi_handle phandle = NULL; - struct acpi_bridge *pab = (struct acpi_bridge *)context; - struct acpi_bridge *lab; - acpi_status status; - u8 *path_name = acpi_path_name(handle); - - /* get _SUN */ - status = acpi_evaluate_integer(handle, METHOD_NAME__SUN, NULL, &sun); - switch(status) { - case AE_NOT_FOUND: - return AE_OK; - default: - if (ACPI_FAILURE(status)) { - err("acpi_pciehprm:%s _SUN fail=0x%x\n", path_name, status); - return status; - } - } - - /* get _ADR. _ADR must exist if _SUN exists */ - status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, &adr); - if (ACPI_FAILURE(status)) { - err("acpi_pciehprm:%s _ADR fail=0x%x\n", path_name, status); - return status; - } - - dbg("acpi_pciehprm:%s sun=0x%08x adr=0x%08x\n", path_name, (u32)sun, (u32)adr); - - status = acpi_get_parent(handle, &phandle); - if (ACPI_FAILURE(status)) { - err("acpi_pciehprm:%s get_parent fail=0x%x\n", path_name, status); - return (status); - } - - bus_num = pab->bus; - seg_num = pab->seg; - - if (pab->bus == bus_num) { - lab = pab; - } else { - dbg("WARN: pab is not parent\n"); - lab = find_acpi_bridge_by_bus(pab, seg_num, bus_num); - if (!lab) { - dbg("acpi_pciehprm: alloc new P2P bridge(%x) for sun(%08x)\n", (u32)bus_num, (u32)sun); - lab = (struct acpi_bridge *)kmalloc(sizeof(struct acpi_bridge), GFP_KERNEL); - if (!lab) { - err("acpi_pciehprm: alloc for ab fail\n"); - return AE_NO_MEMORY; - } - memset(lab, 0, sizeof(struct acpi_bridge)); - - lab->handle = phandle; - lab->pbus = pab->bus; - lab->pdevice = (int)(padr >> 16) & 0xffff; - lab->pfunction = (int)(padr & 0xffff); - lab->bus = (int)bus_num; - lab->scanned = 0; - lab->type = BRIDGE_TYPE_P2P; - - pciehprm_acpi_register_a_bridge (&acpi_bridges_head, pab, lab); - } else - dbg("acpi_pciehprm: found P2P bridge(%x) for sun(%08x)\n", (u32)bus_num, (u32)sun); - } - - acpi_add_slot_to_php_slots(lab, (int)bus_num, handle, (u32)adr, (u32)sun); - - return (status); -} - -static int pciehprm_acpi_build_php_slots( - struct acpi_bridge *ab, - u32 depth - ) -{ - acpi_status status; - u8 *path_name = acpi_path_name(ab->handle); - - /* Walk down this pci bridge to get _SUNs if any behind P2P */ - status = acpi_walk_namespace ( ACPI_TYPE_DEVICE, - ab->handle, - depth, - pciehprm_acpi_build_php_slots_callback, - ab, - NULL ); - if (ACPI_FAILURE(status)) { - dbg("acpi_pciehprm:%s walk for _SUN on pci bridge seg:bus(%x:%x) fail=0x%x\n", path_name, ab->seg, ab->bus, status); - return -1; - } - - return 0; -} - -static void build_a_bridge( - struct acpi_bridge *pab, - struct acpi_bridge *ab - ) -{ - u8 *path_name = acpi_path_name(ab->handle); - - pciehprm_acpi_register_a_bridge (&acpi_bridges_head, pab, ab); - - switch (ab->type) { - case BRIDGE_TYPE_HOST: - dbg("acpi_pciehprm: Registered PCI HOST Bridge(%02x) on s:b:d:f(%02x:%02x:%02x:%02x) [%s]\n", - ab->bus, ab->seg, ab->pbus, ab->pdevice, ab->pfunction, path_name); - break; - case BRIDGE_TYPE_P2P: - dbg("acpi_pciehprm: Registered PCI P2P Bridge(%02x-%02x) on s:b:d:f(%02x:%02x:%02x:%02x) [%s]\n", - ab->pbus, ab->bus, ab->seg, ab->pbus, ab->pdevice, ab->pfunction, path_name); - break; - }; - - /* build any immediate PHP slots under this pci bridge */ - pciehprm_acpi_build_php_slots(ab, 1); -} - -static struct acpi_bridge * add_p2p_bridge( - acpi_handle handle, - struct acpi_bridge *pab, /* parent */ - ulong adr - ) -{ - struct acpi_bridge *ab; - struct pci_dev *pdev; - ulong devnum, funcnum; - u8 *path_name = acpi_path_name(handle); - - ab = (struct acpi_bridge *) kmalloc (sizeof(struct acpi_bridge), GFP_KERNEL); - if (!ab) { - err("acpi_pciehprm: alloc for ab fail\n"); - return NULL; - } - memset(ab, 0, sizeof(struct acpi_bridge)); - - devnum = (adr >> 16) & 0xffff; - funcnum = adr & 0xffff; - - pdev = pci_find_slot(pab->bus, PCI_DEVFN(devnum, funcnum)); - if (!pdev || !pdev->subordinate) { - err("acpi_pciehprm:%s is not a P2P Bridge\n", path_name); - kfree(ab); - return NULL; - } - - ab->handle = handle; - ab->seg = pab->seg; - ab->pbus = pab->bus; /* or pdev->bus->number */ - ab->pdevice = devnum; /* or PCI_SLOT(pdev->devfn) */ - ab->pfunction = funcnum; /* or PCI_FUNC(pdev->devfn) */ - ab->bus = pdev->subordinate->number; - ab->scanned = 0; - ab->type = BRIDGE_TYPE_P2P; - - dbg("acpi_pciehprm: P2P(%x-%x) on pci=b:d:f(%x:%x:%x) acpi=b:d:f(%x:%x:%x) [%s]\n", - pab->bus, ab->bus, pdev->bus->number, PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), - pab->bus, (u32)devnum, (u32)funcnum, path_name); - - build_a_bridge(pab, ab); - - return ab; -} - -static acpi_status scan_p2p_bridge( - acpi_handle handle, - u32 Level, - void *context, - void **retval - ) -{ - struct acpi_bridge *pab = (struct acpi_bridge *)context; - struct acpi_bridge *ab; - acpi_status status; - ulong adr = 0; - u8 *path_name = acpi_path_name(handle); - ulong devnum, funcnum; - struct pci_dev *pdev; - - /* get device, function */ - status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, &adr); - if (ACPI_FAILURE(status)) { - if (status != AE_NOT_FOUND) - err("acpi_pciehprm:%s _ADR fail=0x%x\n", path_name, status); - return AE_OK; - } - - devnum = (adr >> 16) & 0xffff; - funcnum = adr & 0xffff; - - pdev = pci_find_slot(pab->bus, PCI_DEVFN(devnum, funcnum)); - if (!pdev) - return AE_OK; - if (!pdev->subordinate) - return AE_OK; - - ab = add_p2p_bridge(handle, pab, adr); - if (ab) { - status = acpi_walk_namespace ( ACPI_TYPE_DEVICE, - handle, - (u32)1, - scan_p2p_bridge, - ab, - NULL); + chandle = handle; + status = acpi_get_parent(chandle, &handle); if (ACPI_FAILURE(status)) - dbg("acpi_pciehprm:%s find_p2p fail=0x%x\n", path_name, status); - } - - return AE_OK; -} - -static struct acpi_bridge * add_host_bridge( - acpi_handle handle, - ulong segnum, - ulong busnum - ) -{ - ulong adr = 0; - acpi_status status; - struct acpi_bridge *ab; - u8 *path_name = acpi_path_name(handle); - - /* get device, function: host br adr is always 0000 though. */ - status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, &adr); - if (ACPI_FAILURE(status)) { - err("acpi_pciehprm:%s _ADR fail=0x%x\n", path_name, status); - return NULL; - } - dbg("acpi_pciehprm: ROOT PCI seg(0x%x)bus(0x%x)dev(0x%x)func(0x%x) [%s]\n", (u32)segnum, - (u32)busnum, (u32)(adr >> 16) & 0xffff, (u32)adr & 0xffff, path_name); - - ab = (struct acpi_bridge *) kmalloc (sizeof(struct acpi_bridge), GFP_KERNEL); - if (!ab) { - err("acpi_pciehprm: alloc for ab fail\n"); - return NULL; - } - memset(ab, 0, sizeof(struct acpi_bridge)); - - ab->handle = handle; - ab->seg = (int)segnum; - ab->bus = ab->pbus = (int)busnum; - ab->pdevice = (int)(adr >> 16) & 0xffff; - ab->pfunction = (int)(adr & 0xffff); - ab->scanned = 0; - ab->type = BRIDGE_TYPE_HOST; - - /* get root pci bridge's current resources */ - status = acpi_get_crs(ab); - if (ACPI_FAILURE(status)) { - err("acpi_pciehprm:%s evaluate _CRS fail=0x%x\n", path_name, status); - kfree(ab); - return NULL; - } - - status = pci_osc_control_set (OSC_PCI_EXPRESS_NATIVE_HP_CONTROL); - if (ACPI_FAILURE(status)) { - err("%s: status %x\n", __FUNCTION__, status); - osc_run_status = (status == AE_NOT_FOUND) ? OSC_NOT_EXIST : OSC_RUN_FAILED; - } else { - osc_run_status = NC_RUN_SUCCESS; - } - dbg("%s: osc_run_status %x\n", __FUNCTION__, osc_run_status); - - build_a_bridge(ab, ab); - - return ab; -} - -static acpi_status acpi_scan_from_root_pci_callback ( - acpi_handle handle, - u32 Level, - void *context, - void **retval - ) -{ - ulong segnum = 0; - ulong busnum = 0; - acpi_status status; - struct acpi_bridge *ab; - u8 *path_name = acpi_path_name(handle); - - /* get bus number of this pci root bridge */ - status = acpi_evaluate_integer(handle, METHOD_NAME__SEG, NULL, &segnum); - if (ACPI_FAILURE(status)) { - if (status != AE_NOT_FOUND) { - err("acpi_pciehprm:%s evaluate _SEG fail=0x%x\n", path_name, status); - return status; - } - segnum = 0; - } - - /* get bus number of this pci root bridge */ - status = acpi_evaluate_integer(handle, METHOD_NAME__BBN, NULL, &busnum); - if (ACPI_FAILURE(status)) { - err("acpi_pciehprm:%s evaluate _BBN fail=0x%x\n", path_name, status); - return (status); - } - - ab = add_host_bridge(handle, segnum, busnum); - if (ab) { - status = acpi_walk_namespace ( ACPI_TYPE_DEVICE, - handle, - 1, - scan_p2p_bridge, - ab, - NULL); - if (ACPI_FAILURE(status)) - dbg("acpi_pciehprm:%s find_p2p fail=0x%x\n", path_name, status); + break; } - return AE_OK; + err("Cannot get control of hotplug hardware for pci %s\n", + pci_name(dev)); + return -1; } -static int pciehprm_acpi_scan_pci (void) +void pciehp_get_hp_params_from_firmware(struct pci_dev *dev, + struct hotplug_params *hpp) { - acpi_status status; + acpi_status status = AE_NOT_FOUND; + struct pci_dev *pdev = dev; /* - * TBD: traverse LDM device tree with the help of - * unified ACPI augmented for php device population. + * _HPP settings apply to all child buses, until another _HPP is + * encountered. If we don't find an _HPP for the input pci dev, + * look for it in the parent device scope since that would apply to + * this pci dev. If we don't find any _HPP, use hardcoded defaults */ - status = acpi_get_devices ( PCI_ROOT_HID_STRING, - acpi_scan_from_root_pci_callback, - NULL, - NULL ); - if (ACPI_FAILURE(status)) { - err("acpi_pciehprm:get_device PCI ROOT HID fail=0x%x\n", status); - return -1; - } - - return 0; -} - -int pciehprm_init(enum php_ctlr_type ctlr_type) -{ - int rc; - - if (ctlr_type != PCI) - return -ENODEV; - - dbg("pciehprm ACPI init <enter>\n"); - acpi_bridges_head = NULL; - - /* construct PCI bus:device tree of acpi_handles */ - rc = pciehprm_acpi_scan_pci(); - if (rc) - return rc; - - if ((oshp_run_status != NC_RUN_SUCCESS) && (osc_run_status != NC_RUN_SUCCESS)) { - err("Fails to gain control of native hot-plug\n"); - rc = -ENODEV; - } - - dbg("pciehprm ACPI init %s\n", (rc)?"fail":"success"); - return rc; -} - -static void free_a_slot(struct acpi_php_slot *aps) -{ - dbg(" free a php func of slot(0x%02x) on PCI b:d:f=0x%02x:%02x:%02x\n", aps->sun, aps->bus, aps->dev, aps->fun); - - free_pci_resource (aps->io_head); - free_pci_resource (aps->bus_head); - free_pci_resource (aps->mem_head); - free_pci_resource (aps->p_mem_head); - - kfree(aps); -} - -static void free_a_bridge( struct acpi_bridge *ab) -{ - struct acpi_php_slot *aps, *next; - - switch (ab->type) { - case BRIDGE_TYPE_HOST: - dbg("Free ACPI PCI HOST Bridge(%x) [%s] on s:b:d:f(%x:%x:%x:%x)\n", - ab->bus, acpi_path_name(ab->handle), ab->seg, ab->pbus, ab->pdevice, ab->pfunction); - break; - case BRIDGE_TYPE_P2P: - dbg("Free ACPI PCI P2P Bridge(%x-%x) [%s] on s:b:d:f(%x:%x:%x:%x)\n", - ab->pbus, ab->bus, acpi_path_name(ab->handle), ab->seg, ab->pbus, ab->pdevice, ab->pfunction); - break; - }; - - /* free slots first */ - for (aps = ab->slots; aps; aps = next) { - next = aps->next; - free_a_slot(aps); - } - - free_pci_resource (ab->io_head); - free_pci_resource (ab->tio_head); - free_pci_resource (ab->bus_head); - free_pci_resource (ab->tbus_head); - free_pci_resource (ab->mem_head); - free_pci_resource (ab->tmem_head); - free_pci_resource (ab->p_mem_head); - free_pci_resource (ab->tp_mem_head); - - kfree(ab); -} - -static void pciehprm_free_bridges ( struct acpi_bridge *ab) -{ - if (!ab) - return; - - if (ab->child) - pciehprm_free_bridges (ab->child); - - if (ab->next) - pciehprm_free_bridges (ab->next); - - free_a_bridge(ab); -} - -void pciehprm_cleanup(void) -{ - pciehprm_free_bridges (acpi_bridges_head); -} - -static int get_number_of_slots ( - struct acpi_bridge *ab, - int selfonly - ) -{ - struct acpi_php_slot *aps; - int prev_slot = -1; - int slot_num = 0; - - for ( aps = ab->slots; aps; aps = aps->next) - if (aps->dev != prev_slot) { - prev_slot = aps->dev; - slot_num++; - } - - if (ab->child) - slot_num += get_number_of_slots (ab->child, 0); - - if (selfonly) - return slot_num; - - if (ab->next) - slot_num += get_number_of_slots (ab->next, 0); - - return slot_num; -} - -static int print_acpi_resources (struct acpi_bridge *ab) -{ - struct acpi_php_slot *aps; - int i; - - switch (ab->type) { - case BRIDGE_TYPE_HOST: - dbg("PCI HOST Bridge (%x) [%s]\n", ab->bus, acpi_path_name(ab->handle)); - break; - case BRIDGE_TYPE_P2P: - dbg("PCI P2P Bridge (%x-%x) [%s]\n", ab->pbus, ab->bus, acpi_path_name(ab->handle)); - break; - }; - - print_pci_resources (ab); - - for ( i = -1, aps = ab->slots; aps; aps = aps->next) { - if (aps->dev == i) - continue; - dbg(" Slot sun(%x) s:b:d:f(%02x:%02x:%02x:%02x)\n", aps->sun, aps->seg, aps->bus, aps->dev, aps->fun); - print_slot_resources(aps); - i = aps->dev; - } - - if (ab->child) - print_acpi_resources (ab->child); - - if (ab->next) - print_acpi_resources (ab->next); - - return 0; -} - -int pciehprm_print_pirt(void) -{ - dbg("PCIEHPRM ACPI Slots\n"); - if (acpi_bridges_head) - print_acpi_resources (acpi_bridges_head); - - return 0; -} - -static struct acpi_php_slot * get_acpi_slot ( - struct acpi_bridge *ab, - u32 sun - ) -{ - struct acpi_php_slot *aps = NULL; - - for ( aps = ab->slots; aps; aps = aps->next) - if (aps->sun == sun) - return aps; - - if (!aps && ab->child) { - aps = (struct acpi_php_slot *)get_acpi_slot (ab->child, sun); - if (aps) - return aps; - } - - if (!aps && ab->next) { - aps = (struct acpi_php_slot *)get_acpi_slot (ab->next, sun); - if (aps) - return aps; - } - - return aps; - -} - -#if 0 -void * pciehprm_get_slot(struct slot *slot) -{ - struct acpi_bridge *ab = acpi_bridges_head; - struct acpi_php_slot *aps = get_acpi_slot (ab, slot->number); - - aps->slot = slot; - - dbg("Got acpi slot sun(%x): s:b:d:f(%x:%x:%x:%x)\n", aps->sun, aps->seg, aps->bus, aps->dev, aps->fun); - - return (void *)aps; -} -#endif - -static void pciehprm_dump_func_res( struct pci_func *fun) -{ - struct pci_func *func = fun; - - if (func->bus_head) { - dbg(": BUS Resources:\n"); - print_pci_resource (func->bus_head); - } - if (func->io_head) { - dbg(": IO Resources:\n"); - print_pci_resource (func->io_head); - } - if (func->mem_head) { - dbg(": MEM Resources:\n"); - print_pci_resource (func->mem_head); - } - if (func->p_mem_head) { - dbg(": PMEM Resources:\n"); - print_pci_resource (func->p_mem_head); - } -} - -static void pciehprm_dump_ctrl_res( struct controller *ctlr) -{ - struct controller *ctrl = ctlr; - - if (ctrl->bus_head) { - dbg(": BUS Resources:\n"); - print_pci_resource (ctrl->bus_head); - } - if (ctrl->io_head) { - dbg(": IO Resources:\n"); - print_pci_resource (ctrl->io_head); - } - if (ctrl->mem_head) { - dbg(": MEM Resources:\n"); - print_pci_resource (ctrl->mem_head); - } - if (ctrl->p_mem_head) { - dbg(": PMEM Resources:\n"); - print_pci_resource (ctrl->p_mem_head); - } -} - -static int pciehprm_get_used_resources ( - struct controller *ctrl, - struct pci_func *func - ) -{ - return pciehp_save_used_resources (ctrl, func, !DISABLE_CARD); -} - -static int configure_existing_function( - struct controller *ctrl, - struct pci_func *func - ) -{ - int rc; - - /* see how much resources the func has used. */ - rc = pciehprm_get_used_resources (ctrl, func); - - if (!rc) { - /* subtract the resources used by the func from ctrl resources */ - rc = pciehprm_delete_resources (&ctrl->bus_head, func->bus_head); - rc |= pciehprm_delete_resources (&ctrl->io_head, func->io_head); - rc |= pciehprm_delete_resources (&ctrl->mem_head, func->mem_head); - rc |= pciehprm_delete_resources (&ctrl->p_mem_head, func->p_mem_head); - if (rc) - warn("aCEF: cannot del used resources\n"); - } else - err("aCEF: cannot get used resources\n"); - - return rc; -} - -static int bind_pci_resources_to_slots ( struct controller *ctrl) -{ - struct pci_func *func, new_func; - int busn = ctrl->slot_bus; - int devn, funn; - u32 vid; - - for (devn = 0; devn < 32; devn++) { - for (funn = 0; funn < 8; funn++) { - /* - if (devn == ctrl->device && funn == ctrl->function) - continue; - */ - /* find out if this entry is for an occupied slot */ - vid = 0xFFFFFFFF; - pci_bus_read_config_dword(ctrl->pci_dev->subordinate, PCI_DEVFN(devn, funn), PCI_VENDOR_ID, &vid); - - if (vid != 0xFFFFFFFF) { - dbg("%s: vid = %x\n", __FUNCTION__, vid); - func = pciehp_slot_find(busn, devn, funn); - if (!func) { - memset(&new_func, 0, sizeof(struct pci_func)); - new_func.bus = busn; - new_func.device = devn; - new_func.function = funn; - new_func.is_a_board = 1; - configure_existing_function(ctrl, &new_func); - pciehprm_dump_func_res(&new_func); - } else { - configure_existing_function(ctrl, func); - pciehprm_dump_func_res(func); - } - dbg("aCCF:existing PCI 0x%x Func ResourceDump\n", ctrl->bus); - } - } - } - - return 0; -} - -static int bind_pci_resources( - struct controller *ctrl, - struct acpi_bridge *ab - ) -{ - int status = 0; - - if (ab->bus_head) { - dbg("bapr: BUS Resources add on PCI 0x%x\n", ab->bus); - status = pciehprm_add_resources (&ctrl->bus_head, ab->bus_head); - if (pciehprm_delete_resources (&ab->bus_head, ctrl->bus_head)) - warn("bapr: cannot sub BUS Resource on PCI 0x%x\n", ab->bus); - if (status) { - err("bapr: BUS Resource add on PCI 0x%x: fail=0x%x\n", ab->bus, status); - return status; - } - } else - info("bapr: No BUS Resource on PCI 0x%x.\n", ab->bus); - - if (ab->io_head) { - dbg("bapr: IO Resources add on PCI 0x%x\n", ab->bus); - status = pciehprm_add_resources (&ctrl->io_head, ab->io_head); - if (pciehprm_delete_resources (&ab->io_head, ctrl->io_head)) - warn("bapr: cannot sub IO Resource on PCI 0x%x\n", ab->bus); - if (status) { - err("bapr: IO Resource add on PCI 0x%x: fail=0x%x\n", ab->bus, status); - return status; - } - } else - info("bapr: No IO Resource on PCI 0x%x.\n", ab->bus); - - if (ab->mem_head) { - dbg("bapr: MEM Resources add on PCI 0x%x\n", ab->bus); - status = pciehprm_add_resources (&ctrl->mem_head, ab->mem_head); - if (pciehprm_delete_resources (&ab->mem_head, ctrl->mem_head)) - warn("bapr: cannot sub MEM Resource on PCI 0x%x\n", ab->bus); - if (status) { - err("bapr: MEM Resource add on PCI 0x%x: fail=0x%x\n", ab->bus, status); - return status; - } - } else - info("bapr: No MEM Resource on PCI 0x%x.\n", ab->bus); - - if (ab->p_mem_head) { - dbg("bapr: PMEM Resources add on PCI 0x%x\n", ab->bus); - status = pciehprm_add_resources (&ctrl->p_mem_head, ab->p_mem_head); - if (pciehprm_delete_resources (&ab->p_mem_head, ctrl->p_mem_head)) - warn("bapr: cannot sub PMEM Resource on PCI 0x%x\n", ab->bus); - if (status) { - err("bapr: PMEM Resource add on PCI 0x%x: fail=0x%x\n", ab->bus, status); - return status; - } - } else - info("bapr: No PMEM Resource on PCI 0x%x.\n", ab->bus); - - return status; -} - -static int no_pci_resources( struct acpi_bridge *ab) -{ - return !(ab->p_mem_head || ab->mem_head || ab->io_head || ab->bus_head); -} - -static int find_pci_bridge_resources ( - struct controller *ctrl, - struct acpi_bridge *ab - ) -{ - int rc = 0; - struct pci_func func; - - memset(&func, 0, sizeof(struct pci_func)); - - func.bus = ab->pbus; - func.device = ab->pdevice; - func.function = ab->pfunction; - func.is_a_board = 1; - - /* Get used resources for this PCI bridge */ - rc = pciehp_save_used_resources (ctrl, &func, !DISABLE_CARD); - - ab->io_head = func.io_head; - ab->mem_head = func.mem_head; - ab->p_mem_head = func.p_mem_head; - ab->bus_head = func.bus_head; - if (ab->bus_head) - pciehprm_delete_resource(&ab->bus_head, ctrl->pci_dev->subordinate->number, 1); - - return rc; -} - -static int get_pci_resources_from_bridge( - struct controller *ctrl, - struct acpi_bridge *ab - ) -{ - int rc = 0; - - dbg("grfb: Get Resources for PCI 0x%x from actual PCI bridge 0x%x.\n", ctrl->bus, ab->bus); - - rc = find_pci_bridge_resources (ctrl, ab); - - pciehp_resource_sort_and_combine(&ab->bus_head); - pciehp_resource_sort_and_combine(&ab->io_head); - pciehp_resource_sort_and_combine(&ab->mem_head); - pciehp_resource_sort_and_combine(&ab->p_mem_head); - - pciehprm_add_resources (&ab->tbus_head, ab->bus_head); - pciehprm_add_resources (&ab->tio_head, ab->io_head); - pciehprm_add_resources (&ab->tmem_head, ab->mem_head); - pciehprm_add_resources (&ab->tp_mem_head, ab->p_mem_head); - - return rc; -} - -static int get_pci_resources( - struct controller *ctrl, - struct acpi_bridge *ab - ) -{ - int rc = 0; - - if (no_pci_resources(ab)) { - dbg("spbr:PCI 0x%x has no resources. Get parent resources.\n", ab->bus); - rc = get_pci_resources_from_bridge(ctrl, ab); - } - - return rc; -} - -/* - * Get resources for this ctrl. - * 1. get total resources from ACPI _CRS or bridge (this ctrl) - * 2. find used resources of existing adapters - * 3. subtract used resources from total resources - */ -int pciehprm_find_available_resources( struct controller *ctrl) -{ - int rc = 0; - struct acpi_bridge *ab; - - ab = find_acpi_bridge_by_bus(acpi_bridges_head, ctrl->seg, ctrl->pci_dev->subordinate->number); - if (!ab) { - err("pfar:cannot locate acpi bridge of PCI 0x%x.\n", ctrl->pci_dev->subordinate->number); - return -1; - } - if (no_pci_resources(ab)) { - rc = get_pci_resources(ctrl, ab); - if (rc) { - err("pfar:cannot get pci resources of PCI 0x%x.\n", ctrl->pci_dev->subordinate->number); - return -1; - } - } - - rc = bind_pci_resources(ctrl, ab); - dbg("pfar:pre-Bind PCI 0x%x Ctrl Resource Dump\n", ctrl->pci_dev->subordinate->number); - pciehprm_dump_ctrl_res(ctrl); - - bind_pci_resources_to_slots (ctrl); - - dbg("pfar:post-Bind PCI 0x%x Ctrl Resource Dump\n", ctrl->pci_dev->subordinate->number); - pciehprm_dump_ctrl_res(ctrl); - - return rc; -} - -int pciehprm_set_hpp( - struct controller *ctrl, - struct pci_func *func, - u8 card_type - ) -{ - struct acpi_bridge *ab; - struct pci_bus lpci_bus, *pci_bus; - int rc = 0; - unsigned int devfn; - u8 cls= 0x08; /* default cache line size */ - u8 lt = 0x40; /* default latency timer */ - u8 ep = 0; - u8 es = 0; - - memcpy(&lpci_bus, ctrl->pci_bus, sizeof(lpci_bus)); - pci_bus = &lpci_bus; - pci_bus->number = func->bus; - devfn = PCI_DEVFN(func->device, func->function); - - ab = find_acpi_bridge_by_bus(acpi_bridges_head, ctrl->seg, ctrl->bus); - - if (ab) { - if (ab->_hpp) { - lt = (u8)ab->_hpp->latency_timer; - cls = (u8)ab->_hpp->cache_line_size; - ep = (u8)ab->_hpp->enable_perr; - es = (u8)ab->_hpp->enable_serr; - } else - dbg("_hpp: no _hpp for B/D/F=%#x/%#x/%#x. use default value\n", func->bus, func->device, func->function); - } else - dbg("_hpp: no acpi bridge for B/D/F = %#x/%#x/%#x. use default value\n", func->bus, func->device, func->function); - - - if (card_type == PCI_HEADER_TYPE_BRIDGE) { - /* set subordinate Latency Timer */ - rc |= pci_bus_write_config_byte(pci_bus, devfn, PCI_SEC_LATENCY_TIMER, lt); + while (pdev && (ACPI_FAILURE(status))) { + acpi_handle handle = DEVICE_ACPI_HANDLE(&(pdev->dev)); + if (!handle) + break; + status = acpi_run_hpp(handle, hpp); + if (!(pdev->bus->parent)) + break; + /* Check if a parent object supports _HPP */ + pdev = pdev->bus->parent->self; } - - /* set base Latency Timer */ - rc |= pci_bus_write_config_byte(pci_bus, devfn, PCI_LATENCY_TIMER, lt); - dbg(" set latency timer =0x%02x: %x\n", lt, rc); - - rc |= pci_bus_write_config_byte(pci_bus, devfn, PCI_CACHE_LINE_SIZE, cls); - dbg(" set cache_line_size=0x%02x: %x\n", cls, rc); - - return rc; } -void pciehprm_enable_card( - struct controller *ctrl, - struct pci_func *func, - u8 card_type) -{ - u16 command, cmd, bcommand, bcmd; - struct pci_bus lpci_bus, *pci_bus; - struct acpi_bridge *ab; - unsigned int devfn; - int rc; - - memcpy(&lpci_bus, ctrl->pci_bus, sizeof(lpci_bus)); - pci_bus = &lpci_bus; - pci_bus->number = func->bus; - devfn = PCI_DEVFN(func->device, func->function); - - rc = pci_bus_read_config_word(pci_bus, devfn, PCI_COMMAND, &cmd); - - if (card_type == PCI_HEADER_TYPE_BRIDGE) { - rc = pci_bus_read_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, &bcmd); - } - - command = cmd | PCI_COMMAND_MASTER | PCI_COMMAND_INVALIDATE - | PCI_COMMAND_IO | PCI_COMMAND_MEMORY; - bcommand = bcmd | PCI_BRIDGE_CTL_NO_ISA; - - ab = find_acpi_bridge_by_bus(acpi_bridges_head, ctrl->seg, ctrl->bus); - if (ab) { - if (ab->_hpp) { - if (ab->_hpp->enable_perr) { - command |= PCI_COMMAND_PARITY; - bcommand |= PCI_BRIDGE_CTL_PARITY; - } else { - command &= ~PCI_COMMAND_PARITY; - bcommand &= ~PCI_BRIDGE_CTL_PARITY; - } - if (ab->_hpp->enable_serr) { - command |= PCI_COMMAND_SERR; - bcommand |= PCI_BRIDGE_CTL_SERR; - } else { - command &= ~PCI_COMMAND_SERR; - bcommand &= ~PCI_BRIDGE_CTL_SERR; - } - } else - dbg("no _hpp for B/D/F = %#x/%#x/%#x.\n", func->bus, func->device, func->function); - } else - dbg("no acpi bridge for B/D/F = %#x/%#x/%#x.\n", func->bus, func->device, func->function); - - if (command != cmd) { - rc = pci_bus_write_config_word(pci_bus, devfn, PCI_COMMAND, command); - } - if ((card_type == PCI_HEADER_TYPE_BRIDGE) && (bcommand != bcmd)) { - rc = pci_bus_write_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, bcommand); - } -} |