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 */ 59*fc2f0756SRob Clark void msm_gem_vma_purge(struct msm_gem_vma *vma) 60667ce33eSRob Clark { 61*fc2f0756SRob Clark struct msm_gem_address_space *aspace = vma->aspace; 622ee4b5d2SRob Clark unsigned size = vma->node.size; 637ad0e8cfSJordan Crouse 647ad0e8cfSJordan Crouse /* Print a message if we try to purge a vma in use */ 65b4d329c4SRob 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 7170dc51b4SJordan Crouse aspace->mmu->funcs->unmap(aspace->mmu, vma->iova, size); 727ad0e8cfSJordan Crouse 737ad0e8cfSJordan Crouse vma->mapped = false; 74667ce33eSRob Clark } 75667ce33eSRob Clark 767ad0e8cfSJordan Crouse /* Remove reference counts for the mapping */ 77*fc2f0756SRob Clark void msm_gem_vma_unpin(struct msm_gem_vma *vma) 787ad0e8cfSJordan Crouse { 7995d1deb0SRob Clark if (GEM_WARN_ON(!vma->inuse)) 8095d1deb0SRob Clark return; 818e30fa32SRob Clark if (!GEM_WARN_ON(!vma->iova)) 827ad0e8cfSJordan Crouse vma->inuse--; 83667ce33eSRob Clark } 84667ce33eSRob Clark 8595d1deb0SRob Clark /* Replace pin reference with fence: */ 86*fc2f0756SRob Clark void msm_gem_vma_unpin_fenced(struct msm_gem_vma *vma, struct msm_fence_context *fctx) 8795d1deb0SRob Clark { 8895d1deb0SRob Clark vma->fctx[fctx->index] = fctx; 8995d1deb0SRob Clark vma->fence[fctx->index] = fctx->last_fence; 9095d1deb0SRob Clark vma->fence_mask |= BIT(fctx->index); 91*fc2f0756SRob Clark msm_gem_vma_unpin(vma); 9295d1deb0SRob Clark } 9395d1deb0SRob Clark 9495d1deb0SRob Clark /* Map and pin vma: */ 95667ce33eSRob Clark int 96*fc2f0756SRob Clark msm_gem_vma_map(struct msm_gem_vma *vma, int prot, 972ee4b5d2SRob Clark struct sg_table *sgt, int size) 98667ce33eSRob Clark { 99*fc2f0756SRob Clark struct msm_gem_address_space *aspace = vma->aspace; 100*fc2f0756SRob Clark int ret; 101667ce33eSRob Clark 1028e30fa32SRob Clark if (GEM_WARN_ON(!vma->iova)) 103c0ee9794SJordan Crouse return -EINVAL; 104c0ee9794SJordan Crouse 1057ad0e8cfSJordan Crouse /* Increase the usage counter */ 1067ad0e8cfSJordan Crouse vma->inuse++; 1077ad0e8cfSJordan Crouse 108c0ee9794SJordan Crouse if (vma->mapped) 109667ce33eSRob Clark return 0; 110c0ee9794SJordan Crouse 111c0ee9794SJordan Crouse vma->mapped = true; 112c0ee9794SJordan Crouse 113*fc2f0756SRob Clark if (!aspace) 114*fc2f0756SRob Clark return 0; 115*fc2f0756SRob Clark 116*fc2f0756SRob Clark ret = aspace->mmu->funcs->map(aspace->mmu, vma->iova, sgt, 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 */ 127*fc2f0756SRob Clark void msm_gem_vma_close(struct msm_gem_vma *vma) 1287ad0e8cfSJordan Crouse { 129*fc2f0756SRob Clark struct msm_gem_address_space *aspace = vma->aspace; 130*fc2f0756SRob Clark 131b4d329c4SRob Clark GEM_WARN_ON(msm_gem_vma_inuse(vma) || vma->mapped); 1327ad0e8cfSJordan Crouse 1337ad0e8cfSJordan Crouse spin_lock(&aspace->lock); 1347ad0e8cfSJordan Crouse if (vma->iova) 1357ad0e8cfSJordan Crouse drm_mm_remove_node(&vma->node); 1367ad0e8cfSJordan Crouse spin_unlock(&aspace->lock); 1377ad0e8cfSJordan Crouse 1387ad0e8cfSJordan Crouse vma->iova = 0; 1397ad0e8cfSJordan Crouse 1407ad0e8cfSJordan Crouse msm_gem_address_space_put(aspace); 1417ad0e8cfSJordan Crouse } 1427ad0e8cfSJordan Crouse 143*fc2f0756SRob Clark struct msm_gem_vma *msm_gem_vma_new(struct msm_gem_address_space *aspace) 144*fc2f0756SRob Clark { 145*fc2f0756SRob Clark struct msm_gem_vma *vma; 146*fc2f0756SRob Clark 147*fc2f0756SRob Clark vma = kzalloc(sizeof(*vma), GFP_KERNEL); 148*fc2f0756SRob Clark if (!vma) 149*fc2f0756SRob Clark return NULL; 150*fc2f0756SRob Clark 151*fc2f0756SRob Clark vma->aspace = aspace; 152*fc2f0756SRob Clark 153*fc2f0756SRob Clark return vma; 154*fc2f0756SRob Clark } 155*fc2f0756SRob Clark 156c0ee9794SJordan Crouse /* Initialize a new vma and allocate an iova for it */ 157*fc2f0756SRob Clark int msm_gem_vma_init(struct msm_gem_vma *vma, int size, 158d3b8877eSJonathan Marek u64 range_start, u64 range_end) 159c0ee9794SJordan Crouse { 160*fc2f0756SRob Clark struct msm_gem_address_space *aspace = vma->aspace; 161c0ee9794SJordan Crouse int ret; 162c0ee9794SJordan Crouse 163*fc2f0756SRob Clark if (GEM_WARN_ON(!aspace)) 164*fc2f0756SRob Clark return -EINVAL; 165*fc2f0756SRob Clark 1668e30fa32SRob Clark if (GEM_WARN_ON(vma->iova)) 167c0ee9794SJordan Crouse return -EBUSY; 168c0ee9794SJordan Crouse 169c0ee9794SJordan Crouse spin_lock(&aspace->lock); 1702ee4b5d2SRob Clark ret = drm_mm_insert_node_in_range(&aspace->mm, &vma->node, 1712ee4b5d2SRob Clark size, PAGE_SIZE, 0, 1722ee4b5d2SRob Clark range_start, range_end, 0); 1730e08270aSSushmita Susheelendra spin_unlock(&aspace->lock); 1740e08270aSSushmita Susheelendra 175667ce33eSRob Clark if (ret) 176667ce33eSRob Clark return ret; 177667ce33eSRob Clark 1782ee4b5d2SRob Clark vma->iova = vma->node.start; 179c0ee9794SJordan Crouse vma->mapped = false; 180667ce33eSRob Clark 181ee546cd3SJordan Crouse kref_get(&aspace->kref); 182667ce33eSRob Clark 183c0ee9794SJordan Crouse return 0; 184667ce33eSRob Clark } 185667ce33eSRob Clark 186667ce33eSRob Clark struct msm_gem_address_space * 187ccac7ce3SJordan Crouse msm_gem_address_space_create(struct msm_mmu *mmu, const char *name, 188ccac7ce3SJordan Crouse u64 va_start, u64 size) 189667ce33eSRob Clark { 190667ce33eSRob Clark struct msm_gem_address_space *aspace; 191ccac7ce3SJordan Crouse 192ccac7ce3SJordan Crouse if (IS_ERR(mmu)) 193ccac7ce3SJordan Crouse return ERR_CAST(mmu); 194667ce33eSRob Clark 195667ce33eSRob Clark aspace = kzalloc(sizeof(*aspace), GFP_KERNEL); 196667ce33eSRob Clark if (!aspace) 197667ce33eSRob Clark return ERR_PTR(-ENOMEM); 198667ce33eSRob Clark 1990e08270aSSushmita Susheelendra spin_lock_init(&aspace->lock); 200667ce33eSRob Clark aspace->name = name; 201ccac7ce3SJordan Crouse aspace->mmu = mmu; 202a636a0ffSRob Clark aspace->va_start = va_start; 203a636a0ffSRob Clark aspace->va_size = size; 204667ce33eSRob Clark 2052ee4b5d2SRob Clark drm_mm_init(&aspace->mm, va_start, size); 206c2052a4eSJonathan Marek 207c2052a4eSJonathan Marek kref_init(&aspace->kref); 208c2052a4eSJonathan Marek 209c2052a4eSJonathan Marek return aspace; 210c2052a4eSJonathan Marek } 211