diff options
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v7.c | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v8.c | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 75 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h | 14 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/include/kgd_kfd_interface.h | 6 |
6 files changed, 97 insertions, 4 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v7.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v7.c index b9dbbf9cb8b0..dc7e25cce741 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v7.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v7.c @@ -169,6 +169,8 @@ static const struct kfd2kgd_calls kfd2kgd = { .get_vmem_size = get_vmem_size, .get_gpu_clock_counter = get_gpu_clock_counter, .get_max_engine_clock_in_mhz = get_max_engine_clock_in_mhz, + .alloc_pasid = amdgpu_vm_alloc_pasid, + .free_pasid = amdgpu_vm_free_pasid, .program_sh_mem_settings = kgd_program_sh_mem_settings, .set_pasid_vmid_mapping = kgd_set_pasid_vmid_mapping, .init_pipeline = kgd_init_pipeline, diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v8.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v8.c index 309f2419c6d8..c678c69936a0 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v8.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v8.c @@ -128,6 +128,8 @@ static const struct kfd2kgd_calls kfd2kgd = { .get_vmem_size = get_vmem_size, .get_gpu_clock_counter = get_gpu_clock_counter, .get_max_engine_clock_in_mhz = get_max_engine_clock_in_mhz, + .alloc_pasid = amdgpu_vm_alloc_pasid, + .free_pasid = amdgpu_vm_free_pasid, .program_sh_mem_settings = kgd_program_sh_mem_settings, .set_pasid_vmid_mapping = kgd_set_pasid_vmid_mapping, .init_pipeline = kgd_init_pipeline, diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c index e16229000a98..79d9ab43d42c 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c @@ -825,7 +825,7 @@ int amdgpu_driver_open_kms(struct drm_device *dev, struct drm_file *file_priv) } r = amdgpu_vm_init(adev, &fpriv->vm, - AMDGPU_VM_CONTEXT_GFX); + AMDGPU_VM_CONTEXT_GFX, 0); if (r) { kfree(fpriv); goto out_suspend; diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c index 2196bca7331c..9b795915cab1 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c @@ -27,12 +27,59 @@ */ #include <linux/dma-fence-array.h> #include <linux/interval_tree_generic.h> +#include <linux/idr.h> #include <drm/drmP.h> #include <drm/amdgpu_drm.h> #include "amdgpu.h" #include "amdgpu_trace.h" /* + * PASID manager + * + * PASIDs are global address space identifiers that can be shared + * between the GPU, an IOMMU and the driver. VMs on different devices + * may use the same PASID if they share the same address + * space. Therefore PASIDs are allocated using a global IDA. VMs are + * looked up from the PASID per amdgpu_device. + */ +static DEFINE_IDA(amdgpu_vm_pasid_ida); + +/** + * amdgpu_vm_alloc_pasid - Allocate a PASID + * @bits: Maximum width of the PASID in bits, must be at least 1 + * + * Allocates a PASID of the given width while keeping smaller PASIDs + * available if possible. + * + * Returns a positive integer on success. Returns %-EINVAL if bits==0. + * Returns %-ENOSPC if no PASID was available. Returns %-ENOMEM on + * memory allocation failure. + */ +int amdgpu_vm_alloc_pasid(unsigned int bits) +{ + int pasid = -EINVAL; + + for (bits = min(bits, 31U); bits > 0; bits--) { + pasid = ida_simple_get(&amdgpu_vm_pasid_ida, + 1U << (bits - 1), 1U << bits, + GFP_KERNEL); + if (pasid != -ENOSPC) + break; + } + + return pasid; +} + +/** + * amdgpu_vm_free_pasid - Free a PASID + * @pasid: PASID to free + */ +void amdgpu_vm_free_pasid(unsigned int pasid) +{ + ida_simple_remove(&amdgpu_vm_pasid_ida, pasid); +} + +/* * GPUVM * GPUVM is similar to the legacy gart on older asics, however * rather than there being a single global gart table @@ -2539,7 +2586,7 @@ void amdgpu_vm_adjust_size(struct amdgpu_device *adev, uint64_t vm_size, uint32_ * Init @vm fields. */ int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm, - int vm_context) + int vm_context, unsigned int pasid) { const unsigned align = min(AMDGPU_VM_PTB_ALIGN_SIZE, AMDGPU_VM_PTE_COUNT(adev) * 8); @@ -2620,6 +2667,19 @@ int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm, goto error_free_root; } + if (pasid) { + unsigned long flags; + + spin_lock_irqsave(&adev->vm_manager.pasid_lock, flags); + r = idr_alloc(&adev->vm_manager.pasid_idr, vm, pasid, pasid + 1, + GFP_ATOMIC); + spin_unlock_irqrestore(&adev->vm_manager.pasid_lock, flags); + if (r < 0) + goto error_free_root; + + vm->pasid = pasid; + } + return 0; error_free_root: @@ -2673,6 +2733,14 @@ void amdgpu_vm_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm) bool prt_fini_needed = !!adev->gart.gart_funcs->set_prt; int i; + if (vm->pasid) { + unsigned long flags; + + spin_lock_irqsave(&adev->vm_manager.pasid_lock, flags); + idr_remove(&adev->vm_manager.pasid_idr, vm->pasid); + spin_unlock_irqrestore(&adev->vm_manager.pasid_lock, flags); + } + amd_sched_entity_fini(vm->entity.sched, &vm->entity); if (!RB_EMPTY_ROOT(&vm->va)) { @@ -2752,6 +2820,8 @@ void amdgpu_vm_manager_init(struct amdgpu_device *adev) adev->vm_manager.vm_update_mode = 0; #endif + idr_init(&adev->vm_manager.pasid_idr); + spin_lock_init(&adev->vm_manager.pasid_lock); } /** @@ -2765,6 +2835,9 @@ void amdgpu_vm_manager_fini(struct amdgpu_device *adev) { unsigned i, j; + WARN_ON(!idr_is_empty(&adev->vm_manager.pasid_idr)); + idr_destroy(&adev->vm_manager.pasid_idr); + for (i = 0; i < AMDGPU_MAX_VMHUBS; ++i) { struct amdgpu_vm_id_manager *id_mgr = &adev->vm_manager.id_mgr[i]; diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h index 48c58ae4bb3a..7873dfa8c0f9 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h @@ -25,6 +25,7 @@ #define __AMDGPU_VM_H__ #include <linux/rbtree.h> +#include <linux/idr.h> #include "gpu_scheduler.h" #include "amdgpu_sync.h" @@ -148,8 +149,9 @@ struct amdgpu_vm { /* Scheduler entity for page table updates */ struct amd_sched_entity entity; - /* client id */ + /* client id and PASID (TODO: replace client_id with PASID) */ u64 client_id; + unsigned int pasid; /* dedicated to vm */ struct amdgpu_vm_id *reserved_vmid[AMDGPU_MAX_VMHUBS]; @@ -220,12 +222,20 @@ struct amdgpu_vm_manager { * BIT1[= 0] Compute updated by SDMA [= 1] by CPU */ int vm_update_mode; + + /* PASID to VM mapping, will be used in interrupt context to + * look up VM of a page fault + */ + struct idr pasid_idr; + spinlock_t pasid_lock; }; +int amdgpu_vm_alloc_pasid(unsigned int bits); +void amdgpu_vm_free_pasid(unsigned int pasid); void amdgpu_vm_manager_init(struct amdgpu_device *adev); void amdgpu_vm_manager_fini(struct amdgpu_device *adev); int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm, - int vm_context); + int vm_context, unsigned int pasid); void amdgpu_vm_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm); void amdgpu_vm_get_pd_bo(struct amdgpu_vm *vm, struct list_head *validated, diff --git a/drivers/gpu/drm/amd/include/kgd_kfd_interface.h b/drivers/gpu/drm/amd/include/kgd_kfd_interface.h index 94277cb734d2..f516fd10e6ba 100644 --- a/drivers/gpu/drm/amd/include/kgd_kfd_interface.h +++ b/drivers/gpu/drm/amd/include/kgd_kfd_interface.h @@ -112,6 +112,9 @@ struct tile_config { * * @get_max_engine_clock_in_mhz: Retrieves maximum GPU clock in MHz * + * @alloc_pasid: Allocate a PASID + * @free_pasid: Free a PASID + * * @program_sh_mem_settings: A function that should initiate the memory * properties such as main aperture memory type (cache / non cached) and * secondary aperture base address, size and memory type. @@ -160,6 +163,9 @@ struct kfd2kgd_calls { uint32_t (*get_max_engine_clock_in_mhz)(struct kgd_dev *kgd); + int (*alloc_pasid)(unsigned int bits); + void (*free_pasid)(unsigned int pasid); + /* Register access functions */ void (*program_sh_mem_settings)(struct kgd_dev *kgd, uint32_t vmid, uint32_t sh_mem_config, uint32_t sh_mem_ape1_base, |