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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c')
-rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c | 604 |
1 files changed, 604 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c new file mode 100644 index 0000000000..ff1ea99292 --- /dev/null +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c @@ -0,0 +1,604 @@ +/* + * Copyright 2017 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 "amdgpu_ids.h" + +#include <linux/idr.h> +#include <linux/dma-fence-array.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_pasid_ida); + +/* Helper to free pasid from a fence callback */ +struct amdgpu_pasid_cb { + struct dma_fence_cb cb; + u32 pasid; +}; + +/** + * amdgpu_pasid_alloc - 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_pasid_alloc(unsigned int bits) +{ + int pasid = -EINVAL; + + for (bits = min(bits, 31U); bits > 0; bits--) { + pasid = ida_simple_get(&amdgpu_pasid_ida, + 1U << (bits - 1), 1U << bits, + GFP_KERNEL); + if (pasid != -ENOSPC) + break; + } + + if (pasid >= 0) + trace_amdgpu_pasid_allocated(pasid); + + return pasid; +} + +/** + * amdgpu_pasid_free - Free a PASID + * @pasid: PASID to free + */ +void amdgpu_pasid_free(u32 pasid) +{ + trace_amdgpu_pasid_freed(pasid); + ida_simple_remove(&amdgpu_pasid_ida, pasid); +} + +static void amdgpu_pasid_free_cb(struct dma_fence *fence, + struct dma_fence_cb *_cb) +{ + struct amdgpu_pasid_cb *cb = + container_of(_cb, struct amdgpu_pasid_cb, cb); + + amdgpu_pasid_free(cb->pasid); + dma_fence_put(fence); + kfree(cb); +} + +/** + * amdgpu_pasid_free_delayed - free pasid when fences signal + * + * @resv: reservation object with the fences to wait for + * @pasid: pasid to free + * + * Free the pasid only after all the fences in resv are signaled. + */ +void amdgpu_pasid_free_delayed(struct dma_resv *resv, + u32 pasid) +{ + struct amdgpu_pasid_cb *cb; + struct dma_fence *fence; + int r; + + r = dma_resv_get_singleton(resv, DMA_RESV_USAGE_BOOKKEEP, &fence); + if (r) + goto fallback; + + if (!fence) { + amdgpu_pasid_free(pasid); + return; + } + + cb = kmalloc(sizeof(*cb), GFP_KERNEL); + if (!cb) { + /* Last resort when we are OOM */ + dma_fence_wait(fence, false); + dma_fence_put(fence); + amdgpu_pasid_free(pasid); + } else { + cb->pasid = pasid; + if (dma_fence_add_callback(fence, &cb->cb, + amdgpu_pasid_free_cb)) + amdgpu_pasid_free_cb(fence, &cb->cb); + } + + return; + +fallback: + /* Not enough memory for the delayed delete, as last resort + * block for all the fences to complete. + */ + dma_resv_wait_timeout(resv, DMA_RESV_USAGE_BOOKKEEP, + false, MAX_SCHEDULE_TIMEOUT); + amdgpu_pasid_free(pasid); +} + +/* + * VMID manager + * + * VMIDs are a per VMHUB identifier for page tables handling. + */ + +/** + * amdgpu_vmid_had_gpu_reset - check if reset occured since last use + * + * @adev: amdgpu_device pointer + * @id: VMID structure + * + * Check if GPU reset occured since last use of the VMID. + */ +bool amdgpu_vmid_had_gpu_reset(struct amdgpu_device *adev, + struct amdgpu_vmid *id) +{ + return id->current_gpu_reset_count != + atomic_read(&adev->gpu_reset_counter); +} + +/* Check if we need to switch to another set of resources */ +static bool amdgpu_vmid_gds_switch_needed(struct amdgpu_vmid *id, + struct amdgpu_job *job) +{ + return id->gds_base != job->gds_base || + id->gds_size != job->gds_size || + id->gws_base != job->gws_base || + id->gws_size != job->gws_size || + id->oa_base != job->oa_base || + id->oa_size != job->oa_size; +} + +/* Check if the id is compatible with the job */ +static bool amdgpu_vmid_compatible(struct amdgpu_vmid *id, + struct amdgpu_job *job) +{ + return id->pd_gpu_addr == job->vm_pd_addr && + !amdgpu_vmid_gds_switch_needed(id, job); +} + +/** + * amdgpu_vmid_grab_idle - grab idle VMID + * + * @vm: vm to allocate id for + * @ring: ring we want to submit job to + * @idle: resulting idle VMID + * @fence: fence to wait for if no id could be grabbed + * + * Try to find an idle VMID, if none is idle add a fence to wait to the sync + * object. Returns -ENOMEM when we are out of memory. + */ +static int amdgpu_vmid_grab_idle(struct amdgpu_vm *vm, + struct amdgpu_ring *ring, + struct amdgpu_vmid **idle, + struct dma_fence **fence) +{ + struct amdgpu_device *adev = ring->adev; + unsigned vmhub = ring->vm_hub; + struct amdgpu_vmid_mgr *id_mgr = &adev->vm_manager.id_mgr[vmhub]; + struct dma_fence **fences; + unsigned i; + + if (!dma_fence_is_signaled(ring->vmid_wait)) { + *fence = dma_fence_get(ring->vmid_wait); + return 0; + } + + fences = kmalloc_array(id_mgr->num_ids, sizeof(void *), GFP_KERNEL); + if (!fences) + return -ENOMEM; + + /* Check if we have an idle VMID */ + i = 0; + list_for_each_entry((*idle), &id_mgr->ids_lru, list) { + /* Don't use per engine and per process VMID at the same time */ + struct amdgpu_ring *r = adev->vm_manager.concurrent_flush ? + NULL : ring; + + fences[i] = amdgpu_sync_peek_fence(&(*idle)->active, r); + if (!fences[i]) + break; + ++i; + } + + /* If we can't find a idle VMID to use, wait till one becomes available */ + if (&(*idle)->list == &id_mgr->ids_lru) { + u64 fence_context = adev->vm_manager.fence_context + ring->idx; + unsigned seqno = ++adev->vm_manager.seqno[ring->idx]; + struct dma_fence_array *array; + unsigned j; + + *idle = NULL; + for (j = 0; j < i; ++j) + dma_fence_get(fences[j]); + + array = dma_fence_array_create(i, fences, fence_context, + seqno, true); + if (!array) { + for (j = 0; j < i; ++j) + dma_fence_put(fences[j]); + kfree(fences); + return -ENOMEM; + } + + *fence = dma_fence_get(&array->base); + dma_fence_put(ring->vmid_wait); + ring->vmid_wait = &array->base; + return 0; + } + kfree(fences); + + return 0; +} + +/** + * amdgpu_vmid_grab_reserved - try to assign reserved VMID + * + * @vm: vm to allocate id for + * @ring: ring we want to submit job to + * @job: job who wants to use the VMID + * @id: resulting VMID + * @fence: fence to wait for if no id could be grabbed + * + * Try to assign a reserved VMID. + */ +static int amdgpu_vmid_grab_reserved(struct amdgpu_vm *vm, + struct amdgpu_ring *ring, + struct amdgpu_job *job, + struct amdgpu_vmid **id, + struct dma_fence **fence) +{ + struct amdgpu_device *adev = ring->adev; + unsigned vmhub = ring->vm_hub; + struct amdgpu_vmid_mgr *id_mgr = &adev->vm_manager.id_mgr[vmhub]; + uint64_t fence_context = adev->fence_context + ring->idx; + bool needs_flush = vm->use_cpu_for_update; + uint64_t updates = amdgpu_vm_tlb_seq(vm); + int r; + + *id = id_mgr->reserved; + if ((*id)->owner != vm->immediate.fence_context || + !amdgpu_vmid_compatible(*id, job) || + (*id)->flushed_updates < updates || + !(*id)->last_flush || + ((*id)->last_flush->context != fence_context && + !dma_fence_is_signaled((*id)->last_flush))) { + struct dma_fence *tmp; + + /* Don't use per engine and per process VMID at the same time */ + if (adev->vm_manager.concurrent_flush) + ring = NULL; + + /* to prevent one context starved by another context */ + (*id)->pd_gpu_addr = 0; + tmp = amdgpu_sync_peek_fence(&(*id)->active, ring); + if (tmp) { + *id = NULL; + *fence = dma_fence_get(tmp); + return 0; + } + needs_flush = true; + } + + /* Good we can use this VMID. Remember this submission as + * user of the VMID. + */ + r = amdgpu_sync_fence(&(*id)->active, &job->base.s_fence->finished); + if (r) + return r; + + job->vm_needs_flush = needs_flush; + job->spm_update_needed = true; + return 0; +} + +/** + * amdgpu_vmid_grab_used - try to reuse a VMID + * + * @vm: vm to allocate id for + * @ring: ring we want to submit job to + * @job: job who wants to use the VMID + * @id: resulting VMID + * @fence: fence to wait for if no id could be grabbed + * + * Try to reuse a VMID for this submission. + */ +static int amdgpu_vmid_grab_used(struct amdgpu_vm *vm, + struct amdgpu_ring *ring, + struct amdgpu_job *job, + struct amdgpu_vmid **id, + struct dma_fence **fence) +{ + struct amdgpu_device *adev = ring->adev; + unsigned vmhub = ring->vm_hub; + struct amdgpu_vmid_mgr *id_mgr = &adev->vm_manager.id_mgr[vmhub]; + uint64_t fence_context = adev->fence_context + ring->idx; + uint64_t updates = amdgpu_vm_tlb_seq(vm); + int r; + + job->vm_needs_flush = vm->use_cpu_for_update; + + /* Check if we can use a VMID already assigned to this VM */ + list_for_each_entry_reverse((*id), &id_mgr->ids_lru, list) { + bool needs_flush = vm->use_cpu_for_update; + + /* Check all the prerequisites to using this VMID */ + if ((*id)->owner != vm->immediate.fence_context) + continue; + + if (!amdgpu_vmid_compatible(*id, job)) + continue; + + if (!(*id)->last_flush || + ((*id)->last_flush->context != fence_context && + !dma_fence_is_signaled((*id)->last_flush))) + needs_flush = true; + + if ((*id)->flushed_updates < updates) + needs_flush = true; + + if (needs_flush && !adev->vm_manager.concurrent_flush) + continue; + + /* Good, we can use this VMID. Remember this submission as + * user of the VMID. + */ + r = amdgpu_sync_fence(&(*id)->active, + &job->base.s_fence->finished); + if (r) + return r; + + job->vm_needs_flush |= needs_flush; + return 0; + } + + *id = NULL; + return 0; +} + +/** + * amdgpu_vmid_grab - allocate the next free VMID + * + * @vm: vm to allocate id for + * @ring: ring we want to submit job to + * @job: job who wants to use the VMID + * @fence: fence to wait for if no id could be grabbed + * + * Allocate an id for the vm, adding fences to the sync obj as necessary. + */ +int amdgpu_vmid_grab(struct amdgpu_vm *vm, struct amdgpu_ring *ring, + struct amdgpu_job *job, struct dma_fence **fence) +{ + struct amdgpu_device *adev = ring->adev; + unsigned vmhub = ring->vm_hub; + struct amdgpu_vmid_mgr *id_mgr = &adev->vm_manager.id_mgr[vmhub]; + struct amdgpu_vmid *idle = NULL; + struct amdgpu_vmid *id = NULL; + int r = 0; + + mutex_lock(&id_mgr->lock); + r = amdgpu_vmid_grab_idle(vm, ring, &idle, fence); + if (r || !idle) + goto error; + + if (vm->reserved_vmid[vmhub] || (enforce_isolation && (vmhub == AMDGPU_GFXHUB(0)))) { + r = amdgpu_vmid_grab_reserved(vm, ring, job, &id, fence); + if (r || !id) + goto error; + } else { + r = amdgpu_vmid_grab_used(vm, ring, job, &id, fence); + if (r) + goto error; + + if (!id) { + /* Still no ID to use? Then use the idle one found earlier */ + id = idle; + + /* Remember this submission as user of the VMID */ + r = amdgpu_sync_fence(&id->active, + &job->base.s_fence->finished); + if (r) + goto error; + + job->vm_needs_flush = true; + } + + list_move_tail(&id->list, &id_mgr->ids_lru); + } + + job->gds_switch_needed = amdgpu_vmid_gds_switch_needed(id, job); + if (job->vm_needs_flush) { + id->flushed_updates = amdgpu_vm_tlb_seq(vm); + dma_fence_put(id->last_flush); + id->last_flush = NULL; + } + job->vmid = id - id_mgr->ids; + job->pasid = vm->pasid; + + id->gds_base = job->gds_base; + id->gds_size = job->gds_size; + id->gws_base = job->gws_base; + id->gws_size = job->gws_size; + id->oa_base = job->oa_base; + id->oa_size = job->oa_size; + id->pd_gpu_addr = job->vm_pd_addr; + id->owner = vm->immediate.fence_context; + + trace_amdgpu_vm_grab_id(vm, ring, job); + +error: + mutex_unlock(&id_mgr->lock); + return r; +} + +int amdgpu_vmid_alloc_reserved(struct amdgpu_device *adev, + unsigned vmhub) +{ + struct amdgpu_vmid_mgr *id_mgr = &adev->vm_manager.id_mgr[vmhub]; + + mutex_lock(&id_mgr->lock); + + ++id_mgr->reserved_use_count; + if (!id_mgr->reserved) { + struct amdgpu_vmid *id; + + id = list_first_entry(&id_mgr->ids_lru, struct amdgpu_vmid, + list); + /* Remove from normal round robin handling */ + list_del_init(&id->list); + id_mgr->reserved = id; + } + + mutex_unlock(&id_mgr->lock); + return 0; +} + +void amdgpu_vmid_free_reserved(struct amdgpu_device *adev, + unsigned vmhub) +{ + struct amdgpu_vmid_mgr *id_mgr = &adev->vm_manager.id_mgr[vmhub]; + + mutex_lock(&id_mgr->lock); + if (!--id_mgr->reserved_use_count) { + /* give the reserved ID back to normal round robin */ + list_add(&id_mgr->reserved->list, &id_mgr->ids_lru); + id_mgr->reserved = NULL; + } + + mutex_unlock(&id_mgr->lock); +} + +/** + * amdgpu_vmid_reset - reset VMID to zero + * + * @adev: amdgpu device structure + * @vmhub: vmhub type + * @vmid: vmid number to use + * + * Reset saved GDW, GWS and OA to force switch on next flush. + */ +void amdgpu_vmid_reset(struct amdgpu_device *adev, unsigned vmhub, + unsigned vmid) +{ + struct amdgpu_vmid_mgr *id_mgr = &adev->vm_manager.id_mgr[vmhub]; + struct amdgpu_vmid *id = &id_mgr->ids[vmid]; + + mutex_lock(&id_mgr->lock); + id->owner = 0; + id->gds_base = 0; + id->gds_size = 0; + id->gws_base = 0; + id->gws_size = 0; + id->oa_base = 0; + id->oa_size = 0; + mutex_unlock(&id_mgr->lock); +} + +/** + * amdgpu_vmid_reset_all - reset VMID to zero + * + * @adev: amdgpu device structure + * + * Reset VMID to force flush on next use + */ +void amdgpu_vmid_reset_all(struct amdgpu_device *adev) +{ + unsigned i, j; + + for (i = 0; i < AMDGPU_MAX_VMHUBS; ++i) { + struct amdgpu_vmid_mgr *id_mgr = + &adev->vm_manager.id_mgr[i]; + + for (j = 1; j < id_mgr->num_ids; ++j) + amdgpu_vmid_reset(adev, i, j); + } +} + +/** + * amdgpu_vmid_mgr_init - init the VMID manager + * + * @adev: amdgpu_device pointer + * + * Initialize the VM manager structures + */ +void amdgpu_vmid_mgr_init(struct amdgpu_device *adev) +{ + unsigned i, j; + + for (i = 0; i < AMDGPU_MAX_VMHUBS; ++i) { + struct amdgpu_vmid_mgr *id_mgr = + &adev->vm_manager.id_mgr[i]; + + mutex_init(&id_mgr->lock); + INIT_LIST_HEAD(&id_mgr->ids_lru); + id_mgr->reserved_use_count = 0; + + /* manage only VMIDs not used by KFD */ + id_mgr->num_ids = adev->vm_manager.first_kfd_vmid; + + /* skip over VMID 0, since it is the system VM */ + for (j = 1; j < id_mgr->num_ids; ++j) { + amdgpu_vmid_reset(adev, i, j); + amdgpu_sync_create(&id_mgr->ids[j].active); + list_add_tail(&id_mgr->ids[j].list, &id_mgr->ids_lru); + } + } + /* alloc a default reserved vmid to enforce isolation */ + if (enforce_isolation) + amdgpu_vmid_alloc_reserved(adev, AMDGPU_GFXHUB(0)); + +} + +/** + * amdgpu_vmid_mgr_fini - cleanup VM manager + * + * @adev: amdgpu_device pointer + * + * Cleanup the VM manager and free resources. + */ +void amdgpu_vmid_mgr_fini(struct amdgpu_device *adev) +{ + unsigned i, j; + + for (i = 0; i < AMDGPU_MAX_VMHUBS; ++i) { + struct amdgpu_vmid_mgr *id_mgr = + &adev->vm_manager.id_mgr[i]; + + mutex_destroy(&id_mgr->lock); + for (j = 0; j < AMDGPU_NUM_VMID; ++j) { + struct amdgpu_vmid *id = &id_mgr->ids[j]; + + amdgpu_sync_free(&id->active); + dma_fence_put(id->last_flush); + dma_fence_put(id->pasid_mapping); + } + } +} |