From 6127896f4a272578a62d1b439e86e64721296d65 Mon Sep 17 00:00:00 2001 From: Huang Rui Date: Tue, 18 Aug 2020 14:54:23 +0800 Subject: [PATCH] drm/amdkfd: implement the dGPU fallback path for apu (v6) We still have a few iommu issues which need to address, so force raven as "dgpu" path for the moment. This is to add the fallback path to bypass IOMMU if IOMMU v2 is disabled or ACPI CRAT table not correct. v2: Use ignore_crat parameter to decide whether it will go with IOMMUv2. v3: Align with existed thunk, don't change the way of raven, only renoir will use "dgpu" path by default. v4: don't update global ignore_crat in the driver, and revise fallback function if CRAT is broken. v5: refine acpi crat good but no iommu support case, and rename the title. v6: fix the issue of dGPU initialized firstly, just modify the report value in the node_show(). Signed-off-by: Huang Rui Reviewed-by: Felix Kuehling Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 5 +++- drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 2 +- drivers/gpu/drm/amd/amdkfd/kfd_crat.c | 18 +++++++++++++- drivers/gpu/drm/amd/amdkfd/kfd_device.c | 5 +++- .../drm/amd/amdkfd/kfd_device_queue_manager_v9.c | 2 +- drivers/gpu/drm/amd/amdkfd/kfd_flat_memory.c | 4 +-- drivers/gpu/drm/amd/amdkfd/kfd_iommu.c | 10 ++++---- drivers/gpu/drm/amd/amdkfd/kfd_priv.h | 4 +++ drivers/gpu/drm/amd/amdkfd/kfd_topology.c | 29 +++++++++++++++++++--- 9 files changed, 64 insertions(+), 15 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c index ed29f0ce007c..dfc1a9721867 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c @@ -680,11 +680,14 @@ MODULE_PARM_DESC(debug_largebar, * Ignore CRAT table during KFD initialization. By default, KFD uses the ACPI CRAT * table to get information about AMD APUs. This option can serve as a workaround on * systems with a broken CRAT table. + * + * Default is auto (according to asic type, iommu_v2, and crat table, to decide + * whehter use CRAT) */ int ignore_crat; module_param(ignore_crat, int, 0444); MODULE_PARM_DESC(ignore_crat, - "Ignore CRAT table during KFD initialization (0 = use CRAT (default), 1 = ignore CRAT)"); + "Ignore CRAT table during KFD initialization (0 = auto (default), 1 = ignore CRAT)"); /** * DOC: halt_if_hws_hang (int) diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c index e9b96ad3d9a5..b7b16adb0615 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c @@ -1254,7 +1254,7 @@ bool kfd_dev_is_large_bar(struct kfd_dev *dev) return true; } - if (dev->device_info->needs_iommu_device) + if (dev->use_iommu_v2) return false; amdgpu_amdkfd_get_local_mem_info(dev->kgd, &mem_info); diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c index 6a250f8fcfb8..3fac06b281ce 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c @@ -742,6 +742,22 @@ static int kfd_fill_gpu_cache_info(struct kfd_dev *kdev, return 0; } +static bool kfd_ignore_crat(void) +{ + bool ret; + + if (ignore_crat) + return true; + +#ifndef KFD_SUPPORT_IOMMU_V2 + ret = true; +#else + ret = false; +#endif + + return ret; +} + /* * kfd_create_crat_image_acpi - Allocates memory for CRAT image and * copies CRAT from ACPI (if available). @@ -776,7 +792,7 @@ int kfd_create_crat_image_acpi(void **crat_image, size_t *size) return -EINVAL; } - if (ignore_crat) { + if (kfd_ignore_crat()) { pr_info("CRAT table disabled by module option\n"); return -ENODATA; } diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device.c b/drivers/gpu/drm/amd/amdkfd/kfd_device.c index d5e790f046b4..b15b620e731b 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_device.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_device.c @@ -116,6 +116,7 @@ static const struct kfd_device_info carrizo_device_info = { .num_xgmi_sdma_engines = 0, .num_sdma_queues_per_engine = 2, }; +#endif static const struct kfd_device_info raven_device_info = { .asic_family = CHIP_RAVEN, @@ -134,7 +135,6 @@ static const struct kfd_device_info raven_device_info = { .num_xgmi_sdma_engines = 0, .num_sdma_queues_per_engine = 2, }; -#endif static const struct kfd_device_info hawaii_device_info = { .asic_family = CHIP_HAWAII, @@ -738,6 +738,9 @@ bool kgd2kfd_device_init(struct kfd_dev *kfd, goto gws_error; } + /* If CRAT is broken, won't set iommu enabled */ + kfd_double_confirm_iommu_support(kfd); + if (kfd_iommu_device_init(kfd)) { dev_err(kfd_device, "Error initializing iommuv2\n"); goto device_iommu_error; diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager_v9.c b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager_v9.c index 95a82ac455f2..309f63a0b34a 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager_v9.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager_v9.c @@ -62,7 +62,7 @@ static int update_qpd_v9(struct device_queue_manager *dqm, SH_MEM_ALIGNMENT_MODE_UNALIGNED << SH_MEM_CONFIG__ALIGNMENT_MODE__SHIFT; if (amdgpu_noretry && - !dqm->dev->device_info->needs_iommu_device) + !dqm->dev->use_iommu_v2) qpd->sh_mem_config |= 1 << SH_MEM_CONFIG__RETRY_DISABLE__SHIFT; diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_flat_memory.c b/drivers/gpu/drm/amd/amdkfd/kfd_flat_memory.c index c1166c40ac15..3c22909470f2 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_flat_memory.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_flat_memory.c @@ -321,7 +321,7 @@ static void kfd_init_apertures_vi(struct kfd_process_device *pdd, uint8_t id) pdd->lds_base = MAKE_LDS_APP_BASE_VI(); pdd->lds_limit = MAKE_LDS_APP_LIMIT(pdd->lds_base); - if (!pdd->dev->device_info->needs_iommu_device) { + if (!pdd->dev->use_iommu_v2) { /* dGPUs: SVM aperture starting at 0 * with small reserved space for kernel. * Set them to CANONICAL addresses. @@ -425,7 +425,7 @@ int kfd_init_apertures(struct kfd_process *process) return -EINVAL; } - if (!dev->device_info->needs_iommu_device) { + if (!dev->use_iommu_v2) { /* dGPUs: the reserved space for kernel * before SVM */ diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_iommu.c b/drivers/gpu/drm/amd/amdkfd/kfd_iommu.c index 7c8786b9eb0a..5a64915abaf7 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_iommu.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_iommu.c @@ -41,7 +41,7 @@ int kfd_iommu_check_device(struct kfd_dev *kfd) struct amd_iommu_device_info iommu_info; int err; - if (!kfd->device_info->needs_iommu_device) + if (!kfd->use_iommu_v2) return -ENODEV; iommu_info.flags = 0; @@ -63,7 +63,7 @@ int kfd_iommu_device_init(struct kfd_dev *kfd) unsigned int pasid_limit; int err; - if (!kfd->device_info->needs_iommu_device) + if (!kfd->use_iommu_v2) return 0; iommu_info.flags = 0; @@ -109,7 +109,7 @@ int kfd_iommu_bind_process_to_device(struct kfd_process_device *pdd) struct kfd_process *p = pdd->process; int err; - if (!dev->device_info->needs_iommu_device || pdd->bound == PDD_BOUND) + if (!dev->use_iommu_v2 || pdd->bound == PDD_BOUND) return 0; if (unlikely(pdd->bound == PDD_BOUND_SUSPENDED)) { @@ -284,7 +284,7 @@ static void kfd_unbind_processes_from_device(struct kfd_dev *kfd) */ void kfd_iommu_suspend(struct kfd_dev *kfd) { - if (!kfd->device_info->needs_iommu_device) + if (!kfd->use_iommu_v2) return; kfd_unbind_processes_from_device(kfd); @@ -304,7 +304,7 @@ int kfd_iommu_resume(struct kfd_dev *kfd) unsigned int pasid_limit; int err; - if (!kfd->device_info->needs_iommu_device) + if (!kfd->use_iommu_v2) return 0; pasid_limit = kfd_get_pasid_limit(); diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h index 6727e9de5b8b..f14beb93acb4 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h +++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h @@ -297,6 +297,9 @@ struct kfd_dev { bool pci_atomic_requested; + /* Use IOMMU v2 flag */ + bool use_iommu_v2; + /* SRAM ECC flag */ atomic_t sram_ecc_flag; @@ -892,6 +895,7 @@ struct kfd_dev *kfd_device_by_pci_dev(const struct pci_dev *pdev); struct kfd_dev *kfd_device_by_kgd(const struct kgd_dev *kgd); int kfd_topology_enum_kfd_devices(uint8_t idx, struct kfd_dev **kdev); int kfd_numa_node_to_apic_id(int numa_node_id); +void kfd_double_confirm_iommu_support(struct kfd_dev *gpu); /* Interrupts */ int kfd_interrupt_init(struct kfd_dev *dev); diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_topology.c b/drivers/gpu/drm/amd/amdkfd/kfd_topology.c index f185f6cbc05c..5e8eb783d2d5 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_topology.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_topology.c @@ -446,7 +446,7 @@ static ssize_t node_show(struct kobject *kobj, struct attribute *attr, sysfs_show_32bit_prop(buffer, offs, "cpu_cores_count", dev->node_props.cpu_cores_count); sysfs_show_32bit_prop(buffer, offs, "simd_count", - dev->node_props.simd_count); + dev->gpu ? dev->node_props.simd_count : 0); sysfs_show_32bit_prop(buffer, offs, "mem_banks_count", dev->node_props.mem_banks_count); sysfs_show_32bit_prop(buffer, offs, "caches_count", @@ -1139,7 +1139,7 @@ static struct kfd_topology_device *kfd_assign_gpu(struct kfd_dev *gpu) /* Discrete GPUs need their own topology device list * entries. Don't assign them to CPU/APU nodes. */ - if (!gpu->device_info->needs_iommu_device && + if (!gpu->use_iommu_v2 && dev->node_props.cpu_cores_count) continue; @@ -1388,7 +1388,7 @@ int kfd_topology_add_device(struct kfd_dev *gpu) * Overwrite ATS capability according to needs_iommu_device to fix * potential missing corresponding bit in CRAT of BIOS. */ - if (dev->gpu->device_info->needs_iommu_device) + if (dev->gpu->use_iommu_v2) dev->node_props.capability |= HSA_CAP_ATS_PRESENT; else dev->node_props.capability &= ~HSA_CAP_ATS_PRESENT; @@ -1515,6 +1515,29 @@ int kfd_numa_node_to_apic_id(int numa_node_id) return kfd_cpumask_to_apic_id(cpumask_of_node(numa_node_id)); } +void kfd_double_confirm_iommu_support(struct kfd_dev *gpu) +{ + struct kfd_topology_device *dev; + + gpu->use_iommu_v2 = false; + + if (!gpu->device_info->needs_iommu_device) + return; + + down_read(&topology_lock); + + /* Only use IOMMUv2 if there is an APU topology node with no GPU + * assigned yet. This GPU will be assigned to it. + */ + list_for_each_entry(dev, &topology_device_list, list) + if (dev->node_props.cpu_cores_count && + dev->node_props.simd_count && + !dev->gpu) + gpu->use_iommu_v2 = true; + + up_read(&topology_lock); +} + #if defined(CONFIG_DEBUG_FS) int kfd_debugfs_hqds_by_device(struct seq_file *m, void *data) -- 2.11.0