diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdkfd/kfd_topology.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdkfd/kfd_topology.c | 1235 |
1 files changed, 1235 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_topology.c b/drivers/gpu/drm/amd/amdkfd/kfd_topology.c new file mode 100644 index 000000000000..5733e2859e8a --- /dev/null +++ b/drivers/gpu/drm/amd/amdkfd/kfd_topology.c @@ -0,0 +1,1235 @@ +/* + * Copyright 2014 Advanced Micro Devices, Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + */ + +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/pci.h> +#include <linux/errno.h> +#include <linux/acpi.h> +#include <linux/hash.h> +#include <linux/cpufreq.h> + +#include "kfd_priv.h" +#include "kfd_crat.h" +#include "kfd_topology.h" + +static struct list_head topology_device_list; +static int topology_crat_parsed; +static struct kfd_system_properties sys_props; + +static DECLARE_RWSEM(topology_lock); + +struct kfd_dev *kfd_device_by_id(uint32_t gpu_id) +{ + struct kfd_topology_device *top_dev; + struct kfd_dev *device = NULL; + + down_read(&topology_lock); + + list_for_each_entry(top_dev, &topology_device_list, list) + if (top_dev->gpu_id == gpu_id) { + device = top_dev->gpu; + break; + } + + up_read(&topology_lock); + + return device; +} + +struct kfd_dev *kfd_device_by_pci_dev(const struct pci_dev *pdev) +{ + struct kfd_topology_device *top_dev; + struct kfd_dev *device = NULL; + + down_read(&topology_lock); + + list_for_each_entry(top_dev, &topology_device_list, list) + if (top_dev->gpu->pdev == pdev) { + device = top_dev->gpu; + break; + } + + up_read(&topology_lock); + + return device; +} + +static int kfd_topology_get_crat_acpi(void *crat_image, size_t *size) +{ + struct acpi_table_header *crat_table; + acpi_status status; + + if (!size) + return -EINVAL; + + /* + * Fetch the CRAT table from ACPI + */ + status = acpi_get_table(CRAT_SIGNATURE, 0, &crat_table); + if (status == AE_NOT_FOUND) { + pr_warn("CRAT table not found\n"); + return -ENODATA; + } else if (ACPI_FAILURE(status)) { + const char *err = acpi_format_exception(status); + + pr_err("CRAT table error: %s\n", err); + return -EINVAL; + } + + if (*size >= crat_table->length && crat_image != NULL) + memcpy(crat_image, crat_table, crat_table->length); + + *size = crat_table->length; + + return 0; +} + +static void kfd_populated_cu_info_cpu(struct kfd_topology_device *dev, + struct crat_subtype_computeunit *cu) +{ + BUG_ON(!dev); + BUG_ON(!cu); + + dev->node_props.cpu_cores_count = cu->num_cpu_cores; + dev->node_props.cpu_core_id_base = cu->processor_id_low; + if (cu->hsa_capability & CRAT_CU_FLAGS_IOMMU_PRESENT) + dev->node_props.capability |= HSA_CAP_ATS_PRESENT; + + pr_info("CU CPU: cores=%d id_base=%d\n", cu->num_cpu_cores, + cu->processor_id_low); +} + +static void kfd_populated_cu_info_gpu(struct kfd_topology_device *dev, + struct crat_subtype_computeunit *cu) +{ + BUG_ON(!dev); + BUG_ON(!cu); + + dev->node_props.simd_id_base = cu->processor_id_low; + dev->node_props.simd_count = cu->num_simd_cores; + dev->node_props.lds_size_in_kb = cu->lds_size_in_kb; + dev->node_props.max_waves_per_simd = cu->max_waves_simd; + dev->node_props.wave_front_size = cu->wave_front_size; + dev->node_props.mem_banks_count = cu->num_banks; + dev->node_props.array_count = cu->num_arrays; + dev->node_props.cu_per_simd_array = cu->num_cu_per_array; + dev->node_props.simd_per_cu = cu->num_simd_per_cu; + dev->node_props.max_slots_scratch_cu = cu->max_slots_scatch_cu; + if (cu->hsa_capability & CRAT_CU_FLAGS_HOT_PLUGGABLE) + dev->node_props.capability |= HSA_CAP_HOT_PLUGGABLE; + pr_info("CU GPU: simds=%d id_base=%d\n", cu->num_simd_cores, + cu->processor_id_low); +} + +/* kfd_parse_subtype_cu is called when the topology mutex is already acquired */ +static int kfd_parse_subtype_cu(struct crat_subtype_computeunit *cu) +{ + struct kfd_topology_device *dev; + int i = 0; + + BUG_ON(!cu); + + pr_info("Found CU entry in CRAT table with proximity_domain=%d caps=%x\n", + cu->proximity_domain, cu->hsa_capability); + list_for_each_entry(dev, &topology_device_list, list) { + if (cu->proximity_domain == i) { + if (cu->flags & CRAT_CU_FLAGS_CPU_PRESENT) + kfd_populated_cu_info_cpu(dev, cu); + + if (cu->flags & CRAT_CU_FLAGS_GPU_PRESENT) + kfd_populated_cu_info_gpu(dev, cu); + break; + } + i++; + } + + return 0; +} + +/* + * kfd_parse_subtype_mem is called when the topology mutex is + * already acquired + */ +static int kfd_parse_subtype_mem(struct crat_subtype_memory *mem) +{ + struct kfd_mem_properties *props; + struct kfd_topology_device *dev; + int i = 0; + + BUG_ON(!mem); + + pr_info("Found memory entry in CRAT table with proximity_domain=%d\n", + mem->promixity_domain); + list_for_each_entry(dev, &topology_device_list, list) { + if (mem->promixity_domain == i) { + props = kfd_alloc_struct(props); + if (props == NULL) + return -ENOMEM; + + if (dev->node_props.cpu_cores_count == 0) + props->heap_type = HSA_MEM_HEAP_TYPE_FB_PRIVATE; + else + props->heap_type = HSA_MEM_HEAP_TYPE_SYSTEM; + + if (mem->flags & CRAT_MEM_FLAGS_HOT_PLUGGABLE) + props->flags |= HSA_MEM_FLAGS_HOT_PLUGGABLE; + if (mem->flags & CRAT_MEM_FLAGS_NON_VOLATILE) + props->flags |= HSA_MEM_FLAGS_NON_VOLATILE; + + props->size_in_bytes = + ((uint64_t)mem->length_high << 32) + + mem->length_low; + props->width = mem->width; + + dev->mem_bank_count++; + list_add_tail(&props->list, &dev->mem_props); + + break; + } + i++; + } + + return 0; +} + +/* + * kfd_parse_subtype_cache is called when the topology mutex + * is already acquired + */ +static int kfd_parse_subtype_cache(struct crat_subtype_cache *cache) +{ + struct kfd_cache_properties *props; + struct kfd_topology_device *dev; + uint32_t id; + + BUG_ON(!cache); + + id = cache->processor_id_low; + + pr_info("Found cache entry in CRAT table with processor_id=%d\n", id); + list_for_each_entry(dev, &topology_device_list, list) + if (id == dev->node_props.cpu_core_id_base || + id == dev->node_props.simd_id_base) { + props = kfd_alloc_struct(props); + if (props == NULL) + return -ENOMEM; + + props->processor_id_low = id; + props->cache_level = cache->cache_level; + props->cache_size = cache->cache_size; + props->cacheline_size = cache->cache_line_size; + props->cachelines_per_tag = cache->lines_per_tag; + props->cache_assoc = cache->associativity; + props->cache_latency = cache->cache_latency; + + if (cache->flags & CRAT_CACHE_FLAGS_DATA_CACHE) + props->cache_type |= HSA_CACHE_TYPE_DATA; + if (cache->flags & CRAT_CACHE_FLAGS_INST_CACHE) + props->cache_type |= HSA_CACHE_TYPE_INSTRUCTION; + if (cache->flags & CRAT_CACHE_FLAGS_CPU_CACHE) + props->cache_type |= HSA_CACHE_TYPE_CPU; + if (cache->flags & CRAT_CACHE_FLAGS_SIMD_CACHE) + props->cache_type |= HSA_CACHE_TYPE_HSACU; + + dev->cache_count++; + dev->node_props.caches_count++; + list_add_tail(&props->list, &dev->cache_props); + + break; + } + + return 0; +} + +/* + * kfd_parse_subtype_iolink is called when the topology mutex + * is already acquired + */ +static int kfd_parse_subtype_iolink(struct crat_subtype_iolink *iolink) +{ + struct kfd_iolink_properties *props; + struct kfd_topology_device *dev; + uint32_t i = 0; + uint32_t id_from; + uint32_t id_to; + + BUG_ON(!iolink); + + id_from = iolink->proximity_domain_from; + id_to = iolink->proximity_domain_to; + + pr_info("Found IO link entry in CRAT table with id_from=%d\n", id_from); + list_for_each_entry(dev, &topology_device_list, list) { + if (id_from == i) { + props = kfd_alloc_struct(props); + if (props == NULL) + return -ENOMEM; + + props->node_from = id_from; + props->node_to = id_to; + props->ver_maj = iolink->version_major; + props->ver_min = iolink->version_minor; + + /* + * weight factor (derived from CDIR), currently always 1 + */ + props->weight = 1; + + props->min_latency = iolink->minimum_latency; + props->max_latency = iolink->maximum_latency; + props->min_bandwidth = iolink->minimum_bandwidth_mbs; + props->max_bandwidth = iolink->maximum_bandwidth_mbs; + props->rec_transfer_size = + iolink->recommended_transfer_size; + + dev->io_link_count++; + dev->node_props.io_links_count++; + list_add_tail(&props->list, &dev->io_link_props); + + break; + } + i++; + } + + return 0; +} + +static int kfd_parse_subtype(struct crat_subtype_generic *sub_type_hdr) +{ + struct crat_subtype_computeunit *cu; + struct crat_subtype_memory *mem; + struct crat_subtype_cache *cache; + struct crat_subtype_iolink *iolink; + int ret = 0; + + BUG_ON(!sub_type_hdr); + + switch (sub_type_hdr->type) { + case CRAT_SUBTYPE_COMPUTEUNIT_AFFINITY: + cu = (struct crat_subtype_computeunit *)sub_type_hdr; + ret = kfd_parse_subtype_cu(cu); + break; + case CRAT_SUBTYPE_MEMORY_AFFINITY: + mem = (struct crat_subtype_memory *)sub_type_hdr; + ret = kfd_parse_subtype_mem(mem); + break; + case CRAT_SUBTYPE_CACHE_AFFINITY: + cache = (struct crat_subtype_cache *)sub_type_hdr; + ret = kfd_parse_subtype_cache(cache); + break; + case CRAT_SUBTYPE_TLB_AFFINITY: + /* + * For now, nothing to do here + */ + pr_info("Found TLB entry in CRAT table (not processing)\n"); + break; + case CRAT_SUBTYPE_CCOMPUTE_AFFINITY: + /* + * For now, nothing to do here + */ + pr_info("Found CCOMPUTE entry in CRAT table (not processing)\n"); + break; + case CRAT_SUBTYPE_IOLINK_AFFINITY: + iolink = (struct crat_subtype_iolink *)sub_type_hdr; + ret = kfd_parse_subtype_iolink(iolink); + break; + default: + pr_warn("Unknown subtype (%d) in CRAT\n", + sub_type_hdr->type); + } + + return ret; +} + +static void kfd_release_topology_device(struct kfd_topology_device *dev) +{ + struct kfd_mem_properties *mem; + struct kfd_cache_properties *cache; + struct kfd_iolink_properties *iolink; + + BUG_ON(!dev); + + list_del(&dev->list); + + while (dev->mem_props.next != &dev->mem_props) { + mem = container_of(dev->mem_props.next, + struct kfd_mem_properties, list); + list_del(&mem->list); + kfree(mem); + } + + while (dev->cache_props.next != &dev->cache_props) { + cache = container_of(dev->cache_props.next, + struct kfd_cache_properties, list); + list_del(&cache->list); + kfree(cache); + } + + while (dev->io_link_props.next != &dev->io_link_props) { + iolink = container_of(dev->io_link_props.next, + struct kfd_iolink_properties, list); + list_del(&iolink->list); + kfree(iolink); + } + + kfree(dev); + + sys_props.num_devices--; +} + +static void kfd_release_live_view(void) +{ + struct kfd_topology_device *dev; + + while (topology_device_list.next != &topology_device_list) { + dev = container_of(topology_device_list.next, + struct kfd_topology_device, list); + kfd_release_topology_device(dev); +} + + memset(&sys_props, 0, sizeof(sys_props)); +} + +static struct kfd_topology_device *kfd_create_topology_device(void) +{ + struct kfd_topology_device *dev; + + dev = kfd_alloc_struct(dev); + if (dev == NULL) { + pr_err("No memory to allocate a topology device"); + return NULL; + } + + INIT_LIST_HEAD(&dev->mem_props); + INIT_LIST_HEAD(&dev->cache_props); + INIT_LIST_HEAD(&dev->io_link_props); + + list_add_tail(&dev->list, &topology_device_list); + sys_props.num_devices++; + + return dev; +} + +static int kfd_parse_crat_table(void *crat_image) +{ + struct kfd_topology_device *top_dev; + struct crat_subtype_generic *sub_type_hdr; + uint16_t node_id; + int ret; + struct crat_header *crat_table = (struct crat_header *)crat_image; + uint16_t num_nodes; + uint32_t image_len; + + if (!crat_image) + return -EINVAL; + + num_nodes = crat_table->num_domains; + image_len = crat_table->length; + + pr_info("Parsing CRAT table with %d nodes\n", num_nodes); + + for (node_id = 0; node_id < num_nodes; node_id++) { + top_dev = kfd_create_topology_device(); + if (!top_dev) { + kfd_release_live_view(); + return -ENOMEM; + } + } + + sys_props.platform_id = + (*((uint64_t *)crat_table->oem_id)) & CRAT_OEMID_64BIT_MASK; + sys_props.platform_oem = *((uint64_t *)crat_table->oem_table_id); + sys_props.platform_rev = crat_table->revision; + + sub_type_hdr = (struct crat_subtype_generic *)(crat_table+1); + while ((char *)sub_type_hdr + sizeof(struct crat_subtype_generic) < + ((char *)crat_image) + image_len) { + if (sub_type_hdr->flags & CRAT_SUBTYPE_FLAGS_ENABLED) { + ret = kfd_parse_subtype(sub_type_hdr); + if (ret != 0) { + kfd_release_live_view(); + return ret; + } + } + + sub_type_hdr = (typeof(sub_type_hdr))((char *)sub_type_hdr + + sub_type_hdr->length); + } + + sys_props.generation_count++; + topology_crat_parsed = 1; + + return 0; +} + + +#define sysfs_show_gen_prop(buffer, fmt, ...) \ + snprintf(buffer, PAGE_SIZE, "%s"fmt, buffer, __VA_ARGS__) +#define sysfs_show_32bit_prop(buffer, name, value) \ + sysfs_show_gen_prop(buffer, "%s %u\n", name, value) +#define sysfs_show_64bit_prop(buffer, name, value) \ + sysfs_show_gen_prop(buffer, "%s %llu\n", name, value) +#define sysfs_show_32bit_val(buffer, value) \ + sysfs_show_gen_prop(buffer, "%u\n", value) +#define sysfs_show_str_val(buffer, value) \ + sysfs_show_gen_prop(buffer, "%s\n", value) + +static ssize_t sysprops_show(struct kobject *kobj, struct attribute *attr, + char *buffer) +{ + ssize_t ret; + + /* Making sure that the buffer is an empty string */ + buffer[0] = 0; + + if (attr == &sys_props.attr_genid) { + ret = sysfs_show_32bit_val(buffer, sys_props.generation_count); + } else if (attr == &sys_props.attr_props) { + sysfs_show_64bit_prop(buffer, "platform_oem", + sys_props.platform_oem); + sysfs_show_64bit_prop(buffer, "platform_id", + sys_props.platform_id); + ret = sysfs_show_64bit_prop(buffer, "platform_rev", + sys_props.platform_rev); + } else { + ret = -EINVAL; + } + + return ret; +} + +static const struct sysfs_ops sysprops_ops = { + .show = sysprops_show, +}; + +static struct kobj_type sysprops_type = { + .sysfs_ops = &sysprops_ops, +}; + +static ssize_t iolink_show(struct kobject *kobj, struct attribute *attr, + char *buffer) +{ + ssize_t ret; + struct kfd_iolink_properties *iolink; + + /* Making sure that the buffer is an empty string */ + buffer[0] = 0; + + iolink = container_of(attr, struct kfd_iolink_properties, attr); + sysfs_show_32bit_prop(buffer, "type", iolink->iolink_type); + sysfs_show_32bit_prop(buffer, "version_major", iolink->ver_maj); + sysfs_show_32bit_prop(buffer, "version_minor", iolink->ver_min); + sysfs_show_32bit_prop(buffer, "node_from", iolink->node_from); + sysfs_show_32bit_prop(buffer, "node_to", iolink->node_to); + sysfs_show_32bit_prop(buffer, "weight", iolink->weight); + sysfs_show_32bit_prop(buffer, "min_latency", iolink->min_latency); + sysfs_show_32bit_prop(buffer, "max_latency", iolink->max_latency); + sysfs_show_32bit_prop(buffer, "min_bandwidth", iolink->min_bandwidth); + sysfs_show_32bit_prop(buffer, "max_bandwidth", iolink->max_bandwidth); + sysfs_show_32bit_prop(buffer, "recommended_transfer_size", + iolink->rec_transfer_size); + ret = sysfs_show_32bit_prop(buffer, "flags", iolink->flags); + + return ret; +} + +static const struct sysfs_ops iolink_ops = { + .show = iolink_show, +}; + +static struct kobj_type iolink_type = { + .sysfs_ops = &iolink_ops, +}; + +static ssize_t mem_show(struct kobject *kobj, struct attribute *attr, + char *buffer) +{ + ssize_t ret; + struct kfd_mem_properties *mem; + + /* Making sure that the buffer is an empty string */ + buffer[0] = 0; + + mem = container_of(attr, struct kfd_mem_properties, attr); + sysfs_show_32bit_prop(buffer, "heap_type", mem->heap_type); + sysfs_show_64bit_prop(buffer, "size_in_bytes", mem->size_in_bytes); + sysfs_show_32bit_prop(buffer, "flags", mem->flags); + sysfs_show_32bit_prop(buffer, "width", mem->width); + ret = sysfs_show_32bit_prop(buffer, "mem_clk_max", mem->mem_clk_max); + + return ret; +} + +static const struct sysfs_ops mem_ops = { + .show = mem_show, +}; + +static struct kobj_type mem_type = { + .sysfs_ops = &mem_ops, +}; + +static ssize_t kfd_cache_show(struct kobject *kobj, struct attribute *attr, + char *buffer) +{ + ssize_t ret; + uint32_t i; + struct kfd_cache_properties *cache; + + /* Making sure that the buffer is an empty string */ + buffer[0] = 0; + + cache = container_of(attr, struct kfd_cache_properties, attr); + sysfs_show_32bit_prop(buffer, "processor_id_low", + cache->processor_id_low); + sysfs_show_32bit_prop(buffer, "level", cache->cache_level); + sysfs_show_32bit_prop(buffer, "size", cache->cache_size); + sysfs_show_32bit_prop(buffer, "cache_line_size", cache->cacheline_size); + sysfs_show_32bit_prop(buffer, "cache_lines_per_tag", + cache->cachelines_per_tag); + sysfs_show_32bit_prop(buffer, "association", cache->cache_assoc); + sysfs_show_32bit_prop(buffer, "latency", cache->cache_latency); + sysfs_show_32bit_prop(buffer, "type", cache->cache_type); + snprintf(buffer, PAGE_SIZE, "%ssibling_map ", buffer); + for (i = 0; i < KFD_TOPOLOGY_CPU_SIBLINGS; i++) + ret = snprintf(buffer, PAGE_SIZE, "%s%d%s", + buffer, cache->sibling_map[i], + (i == KFD_TOPOLOGY_CPU_SIBLINGS-1) ? + "\n" : ","); + + return ret; +} + +static const struct sysfs_ops cache_ops = { + .show = kfd_cache_show, +}; + +static struct kobj_type cache_type = { + .sysfs_ops = &cache_ops, +}; + +static ssize_t node_show(struct kobject *kobj, struct attribute *attr, + char *buffer) +{ + ssize_t ret; + struct kfd_topology_device *dev; + char public_name[KFD_TOPOLOGY_PUBLIC_NAME_SIZE]; + uint32_t i; + + /* Making sure that the buffer is an empty string */ + buffer[0] = 0; + + if (strcmp(attr->name, "gpu_id") == 0) { + dev = container_of(attr, struct kfd_topology_device, + attr_gpuid); + ret = sysfs_show_32bit_val(buffer, dev->gpu_id); + } else if (strcmp(attr->name, "name") == 0) { + dev = container_of(attr, struct kfd_topology_device, + attr_name); + for (i = 0; i < KFD_TOPOLOGY_PUBLIC_NAME_SIZE; i++) { + public_name[i] = + (char)dev->node_props.marketing_name[i]; + if (dev->node_props.marketing_name[i] == 0) + break; + } + public_name[KFD_TOPOLOGY_PUBLIC_NAME_SIZE-1] = 0x0; + ret = sysfs_show_str_val(buffer, public_name); + } else { + dev = container_of(attr, struct kfd_topology_device, + attr_props); + sysfs_show_32bit_prop(buffer, "cpu_cores_count", + dev->node_props.cpu_cores_count); + sysfs_show_32bit_prop(buffer, "simd_count", + dev->node_props.simd_count); + + if (dev->mem_bank_count < dev->node_props.mem_banks_count) { + pr_warn("kfd: mem_banks_count truncated from %d to %d\n", + dev->node_props.mem_banks_count, + dev->mem_bank_count); + sysfs_show_32bit_prop(buffer, "mem_banks_count", + dev->mem_bank_count); + } else { + sysfs_show_32bit_prop(buffer, "mem_banks_count", + dev->node_props.mem_banks_count); + } + + sysfs_show_32bit_prop(buffer, "caches_count", + dev->node_props.caches_count); + sysfs_show_32bit_prop(buffer, "io_links_count", + dev->node_props.io_links_count); + sysfs_show_32bit_prop(buffer, "cpu_core_id_base", + dev->node_props.cpu_core_id_base); + sysfs_show_32bit_prop(buffer, "simd_id_base", + dev->node_props.simd_id_base); + sysfs_show_32bit_prop(buffer, "capability", + dev->node_props.capability); + sysfs_show_32bit_prop(buffer, "max_waves_per_simd", + dev->node_props.max_waves_per_simd); + sysfs_show_32bit_prop(buffer, "lds_size_in_kb", + dev->node_props.lds_size_in_kb); + sysfs_show_32bit_prop(buffer, "gds_size_in_kb", + dev->node_props.gds_size_in_kb); + sysfs_show_32bit_prop(buffer, "wave_front_size", + dev->node_props.wave_front_size); + sysfs_show_32bit_prop(buffer, "array_count", + dev->node_props.array_count); + sysfs_show_32bit_prop(buffer, "simd_arrays_per_engine", + dev->node_props.simd_arrays_per_engine); + sysfs_show_32bit_prop(buffer, "cu_per_simd_array", + dev->node_props.cu_per_simd_array); + sysfs_show_32bit_prop(buffer, "simd_per_cu", + dev->node_props.simd_per_cu); + sysfs_show_32bit_prop(buffer, "max_slots_scratch_cu", + dev->node_props.max_slots_scratch_cu); + sysfs_show_32bit_prop(buffer, "engine_id", + dev->node_props.engine_id); + sysfs_show_32bit_prop(buffer, "vendor_id", + dev->node_props.vendor_id); + sysfs_show_32bit_prop(buffer, "device_id", + dev->node_props.device_id); + sysfs_show_32bit_prop(buffer, "location_id", + dev->node_props.location_id); + + if (dev->gpu) { + sysfs_show_32bit_prop(buffer, "max_engine_clk_fcompute", + kfd2kgd->get_max_engine_clock_in_mhz( + dev->gpu->kgd)); + sysfs_show_64bit_prop(buffer, "local_mem_size", + kfd2kgd->get_vmem_size(dev->gpu->kgd)); + } + + ret = sysfs_show_32bit_prop(buffer, "max_engine_clk_ccompute", + cpufreq_quick_get_max(0)/1000); + } + + return ret; +} + +static const struct sysfs_ops node_ops = { + .show = node_show, +}; + +static struct kobj_type node_type = { + .sysfs_ops = &node_ops, +}; + +static void kfd_remove_sysfs_file(struct kobject *kobj, struct attribute *attr) +{ + sysfs_remove_file(kobj, attr); + kobject_del(kobj); + kobject_put(kobj); +} + +static void kfd_remove_sysfs_node_entry(struct kfd_topology_device *dev) +{ + struct kfd_iolink_properties *iolink; + struct kfd_cache_properties *cache; + struct kfd_mem_properties *mem; + + BUG_ON(!dev); + + if (dev->kobj_iolink) { + list_for_each_entry(iolink, &dev->io_link_props, list) + if (iolink->kobj) { + kfd_remove_sysfs_file(iolink->kobj, + &iolink->attr); + iolink->kobj = NULL; + } + kobject_del(dev->kobj_iolink); + kobject_put(dev->kobj_iolink); + dev->kobj_iolink = NULL; + } + + if (dev->kobj_cache) { + list_for_each_entry(cache, &dev->cache_props, list) + if (cache->kobj) { + kfd_remove_sysfs_file(cache->kobj, + &cache->attr); + cache->kobj = NULL; + } + kobject_del(dev->kobj_cache); + kobject_put(dev->kobj_cache); + dev->kobj_cache = NULL; + } + + if (dev->kobj_mem) { + list_for_each_entry(mem, &dev->mem_props, list) + if (mem->kobj) { + kfd_remove_sysfs_file(mem->kobj, &mem->attr); + mem->kobj = NULL; + } + kobject_del(dev->kobj_mem); + kobject_put(dev->kobj_mem); + dev->kobj_mem = NULL; + } + + if (dev->kobj_node) { + sysfs_remove_file(dev->kobj_node, &dev->attr_gpuid); + sysfs_remove_file(dev->kobj_node, &dev->attr_name); + sysfs_remove_file(dev->kobj_node, &dev->attr_props); + kobject_del(dev->kobj_node); + kobject_put(dev->kobj_node); + dev->kobj_node = NULL; + } +} + +static int kfd_build_sysfs_node_entry(struct kfd_topology_device *dev, + uint32_t id) +{ + struct kfd_iolink_properties *iolink; + struct kfd_cache_properties *cache; + struct kfd_mem_properties *mem; + int ret; + uint32_t i; + + BUG_ON(!dev); + + /* + * Creating the sysfs folders + */ + BUG_ON(dev->kobj_node); + dev->kobj_node = kfd_alloc_struct(dev->kobj_node); + if (!dev->kobj_node) + return -ENOMEM; + + ret = kobject_init_and_add(dev->kobj_node, &node_type, + sys_props.kobj_nodes, "%d", id); + if (ret < 0) + return ret; + + dev->kobj_mem = kobject_create_and_add("mem_banks", dev->kobj_node); + if (!dev->kobj_mem) + return -ENOMEM; + + dev->kobj_cache = kobject_create_and_add("caches", dev->kobj_node); + if (!dev->kobj_cache) + return -ENOMEM; + + dev->kobj_iolink = kobject_create_and_add("io_links", dev->kobj_node); + if (!dev->kobj_iolink) + return -ENOMEM; + + /* + * Creating sysfs files for node properties + */ + dev->attr_gpuid.name = "gpu_id"; + dev->attr_gpuid.mode = KFD_SYSFS_FILE_MODE; + sysfs_attr_init(&dev->attr_gpuid); + dev->attr_name.name = "name"; + dev->attr_name.mode = KFD_SYSFS_FILE_MODE; + sysfs_attr_init(&dev->attr_name); + dev->attr_props.name = "properties"; + dev->attr_props.mode = KFD_SYSFS_FILE_MODE; + sysfs_attr_init(&dev->attr_props); + ret = sysfs_create_file(dev->kobj_node, &dev->attr_gpuid); + if (ret < 0) + return ret; + ret = sysfs_create_file(dev->kobj_node, &dev->attr_name); + if (ret < 0) + return ret; + ret = sysfs_create_file(dev->kobj_node, &dev->attr_props); + if (ret < 0) + return ret; + + i = 0; + list_for_each_entry(mem, &dev->mem_props, list) { + mem->kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL); + if (!mem->kobj) + return -ENOMEM; + ret = kobject_init_and_add(mem->kobj, &mem_type, + dev->kobj_mem, "%d", i); + if (ret < 0) + return ret; + + mem->attr.name = "properties"; + mem->attr.mode = KFD_SYSFS_FILE_MODE; + sysfs_attr_init(&mem->attr); + ret = sysfs_create_file(mem->kobj, &mem->attr); + if (ret < 0) + return ret; + i++; + } + + i = 0; + list_for_each_entry(cache, &dev->cache_props, list) { + cache->kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL); + if (!cache->kobj) + return -ENOMEM; + ret = kobject_init_and_add(cache->kobj, &cache_type, + dev->kobj_cache, "%d", i); + if (ret < 0) + return ret; + + cache->attr.name = "properties"; + cache->attr.mode = KFD_SYSFS_FILE_MODE; + sysfs_attr_init(&cache->attr); + ret = sysfs_create_file(cache->kobj, &cache->attr); + if (ret < 0) + return ret; + i++; + } + + i = 0; + list_for_each_entry(iolink, &dev->io_link_props, list) { + iolink->kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL); + if (!iolink->kobj) + return -ENOMEM; + ret = kobject_init_and_add(iolink->kobj, &iolink_type, + dev->kobj_iolink, "%d", i); + if (ret < 0) + return ret; + + iolink->attr.name = "properties"; + iolink->attr.mode = KFD_SYSFS_FILE_MODE; + sysfs_attr_init(&iolink->attr); + ret = sysfs_create_file(iolink->kobj, &iolink->attr); + if (ret < 0) + return ret; + i++; +} + + return 0; +} + +static int kfd_build_sysfs_node_tree(void) +{ + struct kfd_topology_device *dev; + int ret; + uint32_t i = 0; + + list_for_each_entry(dev, &topology_device_list, list) { + ret = kfd_build_sysfs_node_entry(dev, 0); + if (ret < 0) + return ret; + i++; + } + + return 0; +} + +static void kfd_remove_sysfs_node_tree(void) +{ + struct kfd_topology_device *dev; + + list_for_each_entry(dev, &topology_device_list, list) + kfd_remove_sysfs_node_entry(dev); +} + +static int kfd_topology_update_sysfs(void) +{ + int ret; + + pr_info("Creating topology SYSFS entries\n"); + if (sys_props.kobj_topology == NULL) { + sys_props.kobj_topology = + kfd_alloc_struct(sys_props.kobj_topology); + if (!sys_props.kobj_topology) + return -ENOMEM; + + ret = kobject_init_and_add(sys_props.kobj_topology, + &sysprops_type, &kfd_device->kobj, + "topology"); + if (ret < 0) + return ret; + + sys_props.kobj_nodes = kobject_create_and_add("nodes", + sys_props.kobj_topology); + if (!sys_props.kobj_nodes) + return -ENOMEM; + + sys_props.attr_genid.name = "generation_id"; + sys_props.attr_genid.mode = KFD_SYSFS_FILE_MODE; + sysfs_attr_init(&sys_props.attr_genid); + ret = sysfs_create_file(sys_props.kobj_topology, + &sys_props.attr_genid); + if (ret < 0) + return ret; + + sys_props.attr_props.name = "system_properties"; + sys_props.attr_props.mode = KFD_SYSFS_FILE_MODE; + sysfs_attr_init(&sys_props.attr_props); + ret = sysfs_create_file(sys_props.kobj_topology, + &sys_props.attr_props); + if (ret < 0) + return ret; + } + + kfd_remove_sysfs_node_tree(); + + return kfd_build_sysfs_node_tree(); +} + +static void kfd_topology_release_sysfs(void) +{ + kfd_remove_sysfs_node_tree(); + if (sys_props.kobj_topology) { + sysfs_remove_file(sys_props.kobj_topology, + &sys_props.attr_genid); + sysfs_remove_file(sys_props.kobj_topology, + &sys_props.attr_props); + if (sys_props.kobj_nodes) { + kobject_del(sys_props.kobj_nodes); + kobject_put(sys_props.kobj_nodes); + sys_props.kobj_nodes = NULL; + } + kobject_del(sys_props.kobj_topology); + kobject_put(sys_props.kobj_topology); + sys_props.kobj_topology = NULL; + } +} + +int kfd_topology_init(void) +{ + void *crat_image = NULL; + size_t image_size = 0; + int ret; + + /* + * Initialize the head for the topology device list + */ + INIT_LIST_HEAD(&topology_device_list); + init_rwsem(&topology_lock); + topology_crat_parsed = 0; + + memset(&sys_props, 0, sizeof(sys_props)); + + /* + * Get the CRAT image from the ACPI + */ + ret = kfd_topology_get_crat_acpi(crat_image, &image_size); + if (ret == 0 && image_size > 0) { + pr_info("Found CRAT image with size=%zd\n", image_size); + crat_image = kmalloc(image_size, GFP_KERNEL); + if (!crat_image) { + ret = -ENOMEM; + pr_err("No memory for allocating CRAT image\n"); + goto err; + } + ret = kfd_topology_get_crat_acpi(crat_image, &image_size); + + if (ret == 0) { + down_write(&topology_lock); + ret = kfd_parse_crat_table(crat_image); + if (ret == 0) + ret = kfd_topology_update_sysfs(); + up_write(&topology_lock); + } else { + pr_err("Couldn't get CRAT table size from ACPI\n"); + } + kfree(crat_image); + } else if (ret == -ENODATA) { + ret = 0; + } else { + pr_err("Couldn't get CRAT table size from ACPI\n"); + } + +err: + pr_info("Finished initializing topology ret=%d\n", ret); + return ret; +} + +void kfd_topology_shutdown(void) +{ + kfd_topology_release_sysfs(); + kfd_release_live_view(); +} + +static void kfd_debug_print_topology(void) +{ + struct kfd_topology_device *dev; + uint32_t i = 0; + + pr_info("DEBUG PRINT OF TOPOLOGY:"); + list_for_each_entry(dev, &topology_device_list, list) { + pr_info("Node: %d\n", i); + pr_info("\tGPU assigned: %s\n", (dev->gpu ? "yes" : "no")); + pr_info("\tCPU count: %d\n", dev->node_props.cpu_cores_count); + pr_info("\tSIMD count: %d", dev->node_props.simd_count); + i++; + } +} + +static uint32_t kfd_generate_gpu_id(struct kfd_dev *gpu) +{ + uint32_t hashout; + uint32_t buf[7]; + int i; + + if (!gpu) + return 0; + + buf[0] = gpu->pdev->devfn; + buf[1] = gpu->pdev->subsystem_vendor; + buf[2] = gpu->pdev->subsystem_device; + buf[3] = gpu->pdev->device; + buf[4] = gpu->pdev->bus->number; + buf[5] = (uint32_t)(kfd2kgd->get_vmem_size(gpu->kgd) & 0xffffffff); + buf[6] = (uint32_t)(kfd2kgd->get_vmem_size(gpu->kgd) >> 32); + + for (i = 0, hashout = 0; i < 7; i++) + hashout ^= hash_32(buf[i], KFD_GPU_ID_HASH_WIDTH); + + return hashout; +} + +static struct kfd_topology_device *kfd_assign_gpu(struct kfd_dev *gpu) +{ + struct kfd_topology_device *dev; + struct kfd_topology_device *out_dev = NULL; + + BUG_ON(!gpu); + + list_for_each_entry(dev, &topology_device_list, list) + if (dev->gpu == NULL && dev->node_props.simd_count > 0) { + dev->gpu = gpu; + out_dev = dev; + break; + } + + return out_dev; +} + +static void kfd_notify_gpu_change(uint32_t gpu_id, int arrival) +{ + /* + * TODO: Generate an event for thunk about the arrival/removal + * of the GPU + */ +} + +int kfd_topology_add_device(struct kfd_dev *gpu) +{ + uint32_t gpu_id; + struct kfd_topology_device *dev; + int res; + + BUG_ON(!gpu); + + gpu_id = kfd_generate_gpu_id(gpu); + + pr_debug("kfd: Adding new GPU (ID: 0x%x) to topology\n", gpu_id); + + down_write(&topology_lock); + /* + * Try to assign the GPU to existing topology device (generated from + * CRAT table + */ + dev = kfd_assign_gpu(gpu); + if (!dev) { + pr_info("GPU was not found in the current topology. Extending.\n"); + kfd_debug_print_topology(); + dev = kfd_create_topology_device(); + if (!dev) { + res = -ENOMEM; + goto err; + } + dev->gpu = gpu; + + /* + * TODO: Make a call to retrieve topology information from the + * GPU vBIOS + */ + + /* + * Update the SYSFS tree, since we added another topology device + */ + if (kfd_topology_update_sysfs() < 0) + kfd_topology_release_sysfs(); + + } + + dev->gpu_id = gpu_id; + gpu->id = gpu_id; + dev->node_props.vendor_id = gpu->pdev->vendor; + dev->node_props.device_id = gpu->pdev->device; + dev->node_props.location_id = (gpu->pdev->bus->number << 24) + + (gpu->pdev->devfn & 0xffffff); + /* + * TODO: Retrieve max engine clock values from KGD + */ + + res = 0; + +err: + up_write(&topology_lock); + + if (res == 0) + kfd_notify_gpu_change(gpu_id, 1); + + return res; +} + +int kfd_topology_remove_device(struct kfd_dev *gpu) +{ + struct kfd_topology_device *dev; + uint32_t gpu_id; + int res = -ENODEV; + + BUG_ON(!gpu); + + down_write(&topology_lock); + + list_for_each_entry(dev, &topology_device_list, list) + if (dev->gpu == gpu) { + gpu_id = dev->gpu_id; + kfd_remove_sysfs_node_entry(dev); + kfd_release_topology_device(dev); + res = 0; + if (kfd_topology_update_sysfs() < 0) + kfd_topology_release_sysfs(); + break; + } + + up_write(&topology_lock); + + if (res == 0) + kfd_notify_gpu_change(gpu_id, 0); + + return res; +} + +/* + * When idx is out of bounds, the function will return NULL + */ +struct kfd_dev *kfd_topology_enum_kfd_devices(uint8_t idx) +{ + + struct kfd_topology_device *top_dev; + struct kfd_dev *device = NULL; + uint8_t device_idx = 0; + + down_read(&topology_lock); + + list_for_each_entry(top_dev, &topology_device_list, list) { + if (device_idx == idx) { + device = top_dev->gpu; + break; + } + + device_idx++; + } + + up_read(&topology_lock); + + return device; + +} |
