1caab277bSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 2667ce33eSRob Clark /* 3667ce33eSRob Clark * Copyright (C) 2016 Red Hat 4667ce33eSRob Clark * Author: Rob Clark <robdclark@gmail.com> 5667ce33eSRob Clark */ 6667ce33eSRob Clark 7667ce33eSRob Clark #include "msm_drv.h" 895d1deb0SRob Clark #include "msm_fence.h" 9667ce33eSRob Clark #include "msm_gem.h" 10667ce33eSRob Clark #include "msm_mmu.h" 11667ce33eSRob Clark 12ee546cd3SJordan Crouse static void 13ee546cd3SJordan Crouse msm_gem_address_space_destroy(struct kref *kref) 14ee546cd3SJordan Crouse { 15ee546cd3SJordan Crouse struct msm_gem_address_space *aspace = container_of(kref, 16ee546cd3SJordan Crouse struct msm_gem_address_space, kref); 17ee546cd3SJordan Crouse 18ee546cd3SJordan Crouse drm_mm_takedown(&aspace->mm); 19ee546cd3SJordan Crouse if (aspace->mmu) 20ee546cd3SJordan Crouse aspace->mmu->funcs->destroy(aspace->mmu); 2125faf2f2SRob Clark put_pid(aspace->pid); 22ee546cd3SJordan Crouse kfree(aspace); 23ee546cd3SJordan Crouse } 24ee546cd3SJordan Crouse 25ee546cd3SJordan Crouse 26ee546cd3SJordan Crouse void msm_gem_address_space_put(struct msm_gem_address_space *aspace) 27ee546cd3SJordan Crouse { 28ee546cd3SJordan Crouse if (aspace) 29ee546cd3SJordan Crouse kref_put(&aspace->kref, msm_gem_address_space_destroy); 30ee546cd3SJordan Crouse } 31ee546cd3SJordan Crouse 32933415e2SJordan Crouse struct msm_gem_address_space * 33933415e2SJordan Crouse msm_gem_address_space_get(struct msm_gem_address_space *aspace) 34933415e2SJordan Crouse { 35933415e2SJordan Crouse if (!IS_ERR_OR_NULL(aspace)) 36933415e2SJordan Crouse kref_get(&aspace->kref); 37933415e2SJordan Crouse 38933415e2SJordan Crouse return aspace; 39933415e2SJordan Crouse } 40933415e2SJordan Crouse 41ca35ab2aSRob Clark bool msm_gem_vma_inuse(struct msm_gem_vma *vma) 42ca35ab2aSRob Clark { 4395d1deb0SRob Clark if (vma->inuse > 0) 4495d1deb0SRob Clark return true; 4595d1deb0SRob Clark 4695d1deb0SRob Clark while (vma->fence_mask) { 4795d1deb0SRob Clark unsigned idx = ffs(vma->fence_mask) - 1; 4895d1deb0SRob Clark 4995d1deb0SRob Clark if (!msm_fence_completed(vma->fctx[idx], vma->fence[idx])) 5095d1deb0SRob Clark return true; 5195d1deb0SRob Clark 5295d1deb0SRob Clark vma->fence_mask &= ~BIT(idx); 5395d1deb0SRob Clark } 5495d1deb0SRob Clark 5595d1deb0SRob Clark return false; 56ca35ab2aSRob Clark } 57ca35ab2aSRob Clark 587ad0e8cfSJordan Crouse /* Actually unmap memory for the vma */ 597ad0e8cfSJordan Crouse void msm_gem_purge_vma(struct msm_gem_address_space *aspace, 6070dc51b4SJordan Crouse struct msm_gem_vma *vma) 61667ce33eSRob Clark { 622ee4b5d2SRob Clark unsigned size = vma->node.size; 637ad0e8cfSJordan Crouse 647ad0e8cfSJordan Crouse /* Print a message if we try to purge a vma in use */ 65*b4d329c4SRob Clark GEM_WARN_ON(msm_gem_vma_inuse(vma)); 66667ce33eSRob Clark 677ad0e8cfSJordan Crouse /* Don't do anything if the memory isn't mapped */ 687ad0e8cfSJordan Crouse if (!vma->mapped) 697ad0e8cfSJordan Crouse return; 707ad0e8cfSJordan Crouse 717ad0e8cfSJordan Crouse if (aspace->mmu) 7270dc51b4SJordan Crouse aspace->mmu->funcs->unmap(aspace->mmu, vma->iova, size); 737ad0e8cfSJordan Crouse 747ad0e8cfSJordan Crouse vma->mapped = false; 75667ce33eSRob Clark } 76667ce33eSRob Clark 777ad0e8cfSJordan Crouse /* Remove reference counts for the mapping */ 7895d1deb0SRob Clark void msm_gem_unpin_vma(struct msm_gem_vma *vma) 797ad0e8cfSJordan Crouse { 8095d1deb0SRob Clark if (GEM_WARN_ON(!vma->inuse)) 8195d1deb0SRob Clark return; 828e30fa32SRob Clark if (!GEM_WARN_ON(!vma->iova)) 837ad0e8cfSJordan Crouse vma->inuse--; 84667ce33eSRob Clark } 85667ce33eSRob Clark 8695d1deb0SRob Clark /* Replace pin reference with fence: */ 8795d1deb0SRob Clark void msm_gem_unpin_vma_fenced(struct msm_gem_vma *vma, struct msm_fence_context *fctx) 8895d1deb0SRob Clark { 8995d1deb0SRob Clark vma->fctx[fctx->index] = fctx; 9095d1deb0SRob Clark vma->fence[fctx->index] = fctx->last_fence; 9195d1deb0SRob Clark vma->fence_mask |= BIT(fctx->index); 9295d1deb0SRob Clark msm_gem_unpin_vma(vma); 9395d1deb0SRob Clark } 9495d1deb0SRob Clark 9595d1deb0SRob Clark /* Map and pin vma: */ 96667ce33eSRob Clark int 97667ce33eSRob Clark msm_gem_map_vma(struct msm_gem_address_space *aspace, 98bbc2cd07SRob Clark struct msm_gem_vma *vma, int prot, 992ee4b5d2SRob Clark struct sg_table *sgt, int size) 100667ce33eSRob Clark { 101c0ee9794SJordan Crouse int ret = 0; 102667ce33eSRob Clark 1038e30fa32SRob Clark if (GEM_WARN_ON(!vma->iova)) 104c0ee9794SJordan Crouse return -EINVAL; 105c0ee9794SJordan Crouse 1067ad0e8cfSJordan Crouse /* Increase the usage counter */ 1077ad0e8cfSJordan Crouse vma->inuse++; 1087ad0e8cfSJordan Crouse 109c0ee9794SJordan Crouse if (vma->mapped) 110667ce33eSRob Clark return 0; 111c0ee9794SJordan Crouse 112c0ee9794SJordan Crouse vma->mapped = true; 113c0ee9794SJordan Crouse 1147603df38SLuca Weiss if (aspace && aspace->mmu) 115c0ee9794SJordan Crouse ret = aspace->mmu->funcs->map(aspace->mmu, vma->iova, sgt, 116bbc2cd07SRob Clark size, prot); 117c0ee9794SJordan Crouse 11863ca94adSAkhil P Oommen if (ret) { 119c0ee9794SJordan Crouse vma->mapped = false; 12063ca94adSAkhil P Oommen vma->inuse--; 12163ca94adSAkhil P Oommen } 122c0ee9794SJordan Crouse 123c0ee9794SJordan Crouse return ret; 1240e08270aSSushmita Susheelendra } 125667ce33eSRob Clark 1267ad0e8cfSJordan Crouse /* Close an iova. Warn if it is still in use */ 1277ad0e8cfSJordan Crouse void msm_gem_close_vma(struct msm_gem_address_space *aspace, 1287ad0e8cfSJordan Crouse struct msm_gem_vma *vma) 1297ad0e8cfSJordan Crouse { 130*b4d329c4SRob Clark GEM_WARN_ON(msm_gem_vma_inuse(vma) || vma->mapped); 1317ad0e8cfSJordan Crouse 1327ad0e8cfSJordan Crouse spin_lock(&aspace->lock); 1337ad0e8cfSJordan Crouse if (vma->iova) 1347ad0e8cfSJordan Crouse drm_mm_remove_node(&vma->node); 1357ad0e8cfSJordan Crouse spin_unlock(&aspace->lock); 1367ad0e8cfSJordan Crouse 1377ad0e8cfSJordan Crouse vma->iova = 0; 1387ad0e8cfSJordan Crouse 1397ad0e8cfSJordan Crouse msm_gem_address_space_put(aspace); 1407ad0e8cfSJordan Crouse } 1417ad0e8cfSJordan Crouse 142c0ee9794SJordan Crouse /* Initialize a new vma and allocate an iova for it */ 143c0ee9794SJordan Crouse int msm_gem_init_vma(struct msm_gem_address_space *aspace, 1442ee4b5d2SRob Clark struct msm_gem_vma *vma, int size, 145d3b8877eSJonathan Marek u64 range_start, u64 range_end) 146c0ee9794SJordan Crouse { 147c0ee9794SJordan Crouse int ret; 148c0ee9794SJordan Crouse 1498e30fa32SRob Clark if (GEM_WARN_ON(vma->iova)) 150c0ee9794SJordan Crouse return -EBUSY; 151c0ee9794SJordan Crouse 152c0ee9794SJordan Crouse spin_lock(&aspace->lock); 1532ee4b5d2SRob Clark ret = drm_mm_insert_node_in_range(&aspace->mm, &vma->node, 1542ee4b5d2SRob Clark size, PAGE_SIZE, 0, 1552ee4b5d2SRob Clark range_start, range_end, 0); 1560e08270aSSushmita Susheelendra spin_unlock(&aspace->lock); 1570e08270aSSushmita Susheelendra 158667ce33eSRob Clark if (ret) 159667ce33eSRob Clark return ret; 160667ce33eSRob Clark 1612ee4b5d2SRob Clark vma->iova = vma->node.start; 162c0ee9794SJordan Crouse vma->mapped = false; 163667ce33eSRob Clark 164ee546cd3SJordan Crouse kref_get(&aspace->kref); 165667ce33eSRob Clark 166c0ee9794SJordan Crouse return 0; 167667ce33eSRob Clark } 168667ce33eSRob Clark 169667ce33eSRob Clark struct msm_gem_address_space * 170ccac7ce3SJordan Crouse msm_gem_address_space_create(struct msm_mmu *mmu, const char *name, 171ccac7ce3SJordan Crouse u64 va_start, u64 size) 172667ce33eSRob Clark { 173667ce33eSRob Clark struct msm_gem_address_space *aspace; 174ccac7ce3SJordan Crouse 175ccac7ce3SJordan Crouse if (IS_ERR(mmu)) 176ccac7ce3SJordan Crouse return ERR_CAST(mmu); 177667ce33eSRob Clark 178667ce33eSRob Clark aspace = kzalloc(sizeof(*aspace), GFP_KERNEL); 179667ce33eSRob Clark if (!aspace) 180667ce33eSRob Clark return ERR_PTR(-ENOMEM); 181667ce33eSRob Clark 1820e08270aSSushmita Susheelendra spin_lock_init(&aspace->lock); 183667ce33eSRob Clark aspace->name = name; 184ccac7ce3SJordan Crouse aspace->mmu = mmu; 185a636a0ffSRob Clark aspace->va_start = va_start; 186a636a0ffSRob Clark aspace->va_size = size; 187667ce33eSRob Clark 1882ee4b5d2SRob Clark drm_mm_init(&aspace->mm, va_start, size); 189c2052a4eSJonathan Marek 190c2052a4eSJonathan Marek kref_init(&aspace->kref); 191c2052a4eSJonathan Marek 192c2052a4eSJonathan Marek return aspace; 193c2052a4eSJonathan Marek } 194