1c8afe684SRob Clark /* 2c8afe684SRob Clark * Copyright (C) 2013 Red Hat 3c8afe684SRob Clark * Author: Rob Clark <robdclark@gmail.com> 4c8afe684SRob Clark * 5c8afe684SRob Clark * This program is free software; you can redistribute it and/or modify it 6c8afe684SRob Clark * under the terms of the GNU General Public License version 2 as published by 7c8afe684SRob Clark * the Free Software Foundation. 8c8afe684SRob Clark * 9c8afe684SRob Clark * This program is distributed in the hope that it will be useful, but WITHOUT 10c8afe684SRob Clark * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11c8afe684SRob Clark * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 12c8afe684SRob Clark * more details. 13c8afe684SRob Clark * 14c8afe684SRob Clark * You should have received a copy of the GNU General Public License along with 15c8afe684SRob Clark * this program. If not, see <http://www.gnu.org/licenses/>. 16c8afe684SRob Clark */ 17c8afe684SRob Clark 18c8afe684SRob Clark #include <linux/spinlock.h> 19c8afe684SRob Clark #include <linux/shmem_fs.h> 2005b84911SRob Clark #include <linux/dma-buf.h> 2101c8f1c4SDan Williams #include <linux/pfn_t.h> 22c8afe684SRob Clark 23c8afe684SRob Clark #include "msm_drv.h" 24fde5de6cSRob Clark #include "msm_fence.h" 25c8afe684SRob Clark #include "msm_gem.h" 267198e6b0SRob Clark #include "msm_gpu.h" 27871d812aSRob Clark #include "msm_mmu.h" 28c8afe684SRob Clark 290e08270aSSushmita Susheelendra static void msm_gem_vunmap_locked(struct drm_gem_object *obj); 300e08270aSSushmita Susheelendra 310e08270aSSushmita Susheelendra 32871d812aSRob Clark static dma_addr_t physaddr(struct drm_gem_object *obj) 33871d812aSRob Clark { 34871d812aSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 35871d812aSRob Clark struct msm_drm_private *priv = obj->dev->dev_private; 36871d812aSRob Clark return (((dma_addr_t)msm_obj->vram_node->start) << PAGE_SHIFT) + 37871d812aSRob Clark priv->vram.paddr; 38871d812aSRob Clark } 39871d812aSRob Clark 40072f1f91SRob Clark static bool use_pages(struct drm_gem_object *obj) 41072f1f91SRob Clark { 42072f1f91SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 43072f1f91SRob Clark return !msm_obj->vram_node; 44072f1f91SRob Clark } 45072f1f91SRob Clark 46871d812aSRob Clark /* allocate pages from VRAM carveout, used when no IOMMU: */ 470e08270aSSushmita Susheelendra static struct page **get_pages_vram(struct drm_gem_object *obj, int npages) 48871d812aSRob Clark { 49871d812aSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 50871d812aSRob Clark struct msm_drm_private *priv = obj->dev->dev_private; 51871d812aSRob Clark dma_addr_t paddr; 52871d812aSRob Clark struct page **p; 53871d812aSRob Clark int ret, i; 54871d812aSRob Clark 552098105eSMichal Hocko p = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL); 56871d812aSRob Clark if (!p) 57871d812aSRob Clark return ERR_PTR(-ENOMEM); 58871d812aSRob Clark 590e08270aSSushmita Susheelendra spin_lock(&priv->vram.lock); 604e64e553SChris Wilson ret = drm_mm_insert_node(&priv->vram.mm, msm_obj->vram_node, npages); 610e08270aSSushmita Susheelendra spin_unlock(&priv->vram.lock); 62871d812aSRob Clark if (ret) { 632098105eSMichal Hocko kvfree(p); 64871d812aSRob Clark return ERR_PTR(ret); 65871d812aSRob Clark } 66871d812aSRob Clark 67871d812aSRob Clark paddr = physaddr(obj); 68871d812aSRob Clark for (i = 0; i < npages; i++) { 69871d812aSRob Clark p[i] = phys_to_page(paddr); 70871d812aSRob Clark paddr += PAGE_SIZE; 71871d812aSRob Clark } 72871d812aSRob Clark 73871d812aSRob Clark return p; 74871d812aSRob Clark } 75c8afe684SRob Clark 76c8afe684SRob Clark static struct page **get_pages(struct drm_gem_object *obj) 77c8afe684SRob Clark { 78c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 79c8afe684SRob Clark 80c8afe684SRob Clark if (!msm_obj->pages) { 81c8afe684SRob Clark struct drm_device *dev = obj->dev; 82871d812aSRob Clark struct page **p; 83c8afe684SRob Clark int npages = obj->size >> PAGE_SHIFT; 84c8afe684SRob Clark 85072f1f91SRob Clark if (use_pages(obj)) 860cdbe8acSDavid Herrmann p = drm_gem_get_pages(obj); 87871d812aSRob Clark else 88871d812aSRob Clark p = get_pages_vram(obj, npages); 89871d812aSRob Clark 90c8afe684SRob Clark if (IS_ERR(p)) { 916a41da17SMamta Shukla DRM_DEV_ERROR(dev->dev, "could not get pages: %ld\n", 92c8afe684SRob Clark PTR_ERR(p)); 93c8afe684SRob Clark return p; 94c8afe684SRob Clark } 95c8afe684SRob Clark 9662e3a3e3SPrakash Kamliya msm_obj->pages = p; 9762e3a3e3SPrakash Kamliya 98c8afe684SRob Clark msm_obj->sgt = drm_prime_pages_to_sg(p, npages); 991f70e079SWei Yongjun if (IS_ERR(msm_obj->sgt)) { 10062e3a3e3SPrakash Kamliya void *ptr = ERR_CAST(msm_obj->sgt); 101c8afe684SRob Clark 1026a41da17SMamta Shukla DRM_DEV_ERROR(dev->dev, "failed to allocate sgt\n"); 10362e3a3e3SPrakash Kamliya msm_obj->sgt = NULL; 10462e3a3e3SPrakash Kamliya return ptr; 10562e3a3e3SPrakash Kamliya } 106c8afe684SRob Clark 107c8afe684SRob Clark /* For non-cached buffers, ensure the new pages are clean 108c8afe684SRob Clark * because display controller, GPU, etc. are not coherent: 109c8afe684SRob Clark */ 110c8afe684SRob Clark if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED)) 111c8afe684SRob Clark dma_map_sg(dev->dev, msm_obj->sgt->sgl, 112c8afe684SRob Clark msm_obj->sgt->nents, DMA_BIDIRECTIONAL); 113c8afe684SRob Clark } 114c8afe684SRob Clark 115c8afe684SRob Clark return msm_obj->pages; 116c8afe684SRob Clark } 117c8afe684SRob Clark 1180e08270aSSushmita Susheelendra static void put_pages_vram(struct drm_gem_object *obj) 1190e08270aSSushmita Susheelendra { 1200e08270aSSushmita Susheelendra struct msm_gem_object *msm_obj = to_msm_bo(obj); 1210e08270aSSushmita Susheelendra struct msm_drm_private *priv = obj->dev->dev_private; 1220e08270aSSushmita Susheelendra 1230e08270aSSushmita Susheelendra spin_lock(&priv->vram.lock); 1240e08270aSSushmita Susheelendra drm_mm_remove_node(msm_obj->vram_node); 1250e08270aSSushmita Susheelendra spin_unlock(&priv->vram.lock); 1260e08270aSSushmita Susheelendra 1270e08270aSSushmita Susheelendra kvfree(msm_obj->pages); 1280e08270aSSushmita Susheelendra } 1290e08270aSSushmita Susheelendra 130c8afe684SRob Clark static void put_pages(struct drm_gem_object *obj) 131c8afe684SRob Clark { 132c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 133c8afe684SRob Clark 134c8afe684SRob Clark if (msm_obj->pages) { 1353976626eSBen Hutchings if (msm_obj->sgt) { 1363976626eSBen Hutchings /* For non-cached buffers, ensure the new 1373976626eSBen Hutchings * pages are clean because display controller, 1383976626eSBen Hutchings * GPU, etc. are not coherent: 139c8afe684SRob Clark */ 140c8afe684SRob Clark if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED)) 141c8afe684SRob Clark dma_unmap_sg(obj->dev->dev, msm_obj->sgt->sgl, 1423976626eSBen Hutchings msm_obj->sgt->nents, 1433976626eSBen Hutchings DMA_BIDIRECTIONAL); 14462e3a3e3SPrakash Kamliya 145c8afe684SRob Clark sg_free_table(msm_obj->sgt); 146c8afe684SRob Clark kfree(msm_obj->sgt); 1473976626eSBen Hutchings } 148c8afe684SRob Clark 149072f1f91SRob Clark if (use_pages(obj)) 150c8afe684SRob Clark drm_gem_put_pages(obj, msm_obj->pages, true, false); 1510e08270aSSushmita Susheelendra else 1520e08270aSSushmita Susheelendra put_pages_vram(obj); 153871d812aSRob Clark 154c8afe684SRob Clark msm_obj->pages = NULL; 155c8afe684SRob Clark } 156c8afe684SRob Clark } 157c8afe684SRob Clark 15805b84911SRob Clark struct page **msm_gem_get_pages(struct drm_gem_object *obj) 15905b84911SRob Clark { 1600e08270aSSushmita Susheelendra struct msm_gem_object *msm_obj = to_msm_bo(obj); 16105b84911SRob Clark struct page **p; 1620e08270aSSushmita Susheelendra 1630e08270aSSushmita Susheelendra mutex_lock(&msm_obj->lock); 1640e08270aSSushmita Susheelendra 1650e08270aSSushmita Susheelendra if (WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) { 1660e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 1670e08270aSSushmita Susheelendra return ERR_PTR(-EBUSY); 1680e08270aSSushmita Susheelendra } 1690e08270aSSushmita Susheelendra 17005b84911SRob Clark p = get_pages(obj); 1710e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 17205b84911SRob Clark return p; 17305b84911SRob Clark } 17405b84911SRob Clark 17505b84911SRob Clark void msm_gem_put_pages(struct drm_gem_object *obj) 17605b84911SRob Clark { 17705b84911SRob Clark /* when we start tracking the pin count, then do something here */ 17805b84911SRob Clark } 17905b84911SRob Clark 180c8afe684SRob Clark int msm_gem_mmap_obj(struct drm_gem_object *obj, 181c8afe684SRob Clark struct vm_area_struct *vma) 182c8afe684SRob Clark { 183c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 184c8afe684SRob Clark 185c8afe684SRob Clark vma->vm_flags &= ~VM_PFNMAP; 186c8afe684SRob Clark vma->vm_flags |= VM_MIXEDMAP; 187c8afe684SRob Clark 188c8afe684SRob Clark if (msm_obj->flags & MSM_BO_WC) { 189c8afe684SRob Clark vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); 190c8afe684SRob Clark } else if (msm_obj->flags & MSM_BO_UNCACHED) { 191c8afe684SRob Clark vma->vm_page_prot = pgprot_noncached(vm_get_page_prot(vma->vm_flags)); 192c8afe684SRob Clark } else { 193c8afe684SRob Clark /* 194c8afe684SRob Clark * Shunt off cached objs to shmem file so they have their own 195c8afe684SRob Clark * address_space (so unmap_mapping_range does what we want, 196c8afe684SRob Clark * in particular in the case of mmap'd dmabufs) 197c8afe684SRob Clark */ 198c8afe684SRob Clark fput(vma->vm_file); 199c8afe684SRob Clark get_file(obj->filp); 200c8afe684SRob Clark vma->vm_pgoff = 0; 201c8afe684SRob Clark vma->vm_file = obj->filp; 202c8afe684SRob Clark 203c8afe684SRob Clark vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); 204c8afe684SRob Clark } 205c8afe684SRob Clark 206c8afe684SRob Clark return 0; 207c8afe684SRob Clark } 208c8afe684SRob Clark 209c8afe684SRob Clark int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma) 210c8afe684SRob Clark { 211c8afe684SRob Clark int ret; 212c8afe684SRob Clark 213c8afe684SRob Clark ret = drm_gem_mmap(filp, vma); 214c8afe684SRob Clark if (ret) { 215c8afe684SRob Clark DBG("mmap failed: %d", ret); 216c8afe684SRob Clark return ret; 217c8afe684SRob Clark } 218c8afe684SRob Clark 219c8afe684SRob Clark return msm_gem_mmap_obj(vma->vm_private_data, vma); 220c8afe684SRob Clark } 221c8afe684SRob Clark 222a5f74ec7SSouptick Joarder vm_fault_t msm_gem_fault(struct vm_fault *vmf) 223c8afe684SRob Clark { 22411bac800SDave Jiang struct vm_area_struct *vma = vmf->vma; 225c8afe684SRob Clark struct drm_gem_object *obj = vma->vm_private_data; 2260e08270aSSushmita Susheelendra struct msm_gem_object *msm_obj = to_msm_bo(obj); 227c8afe684SRob Clark struct page **pages; 228c8afe684SRob Clark unsigned long pfn; 229c8afe684SRob Clark pgoff_t pgoff; 230a5f74ec7SSouptick Joarder int err; 231a5f74ec7SSouptick Joarder vm_fault_t ret; 232c8afe684SRob Clark 2330e08270aSSushmita Susheelendra /* 2340e08270aSSushmita Susheelendra * vm_ops.open/drm_gem_mmap_obj and close get and put 2350e08270aSSushmita Susheelendra * a reference on obj. So, we dont need to hold one here. 236d78d383aSRob Clark */ 237a5f74ec7SSouptick Joarder err = mutex_lock_interruptible(&msm_obj->lock); 238a5f74ec7SSouptick Joarder if (err) { 239a5f74ec7SSouptick Joarder ret = VM_FAULT_NOPAGE; 240c8afe684SRob Clark goto out; 241a5f74ec7SSouptick Joarder } 242c8afe684SRob Clark 2430e08270aSSushmita Susheelendra if (WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) { 2440e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 2450e08270aSSushmita Susheelendra return VM_FAULT_SIGBUS; 2460e08270aSSushmita Susheelendra } 2470e08270aSSushmita Susheelendra 248c8afe684SRob Clark /* make sure we have pages attached now */ 249c8afe684SRob Clark pages = get_pages(obj); 250c8afe684SRob Clark if (IS_ERR(pages)) { 251a5f74ec7SSouptick Joarder ret = vmf_error(PTR_ERR(pages)); 252c8afe684SRob Clark goto out_unlock; 253c8afe684SRob Clark } 254c8afe684SRob Clark 255c8afe684SRob Clark /* We don't use vmf->pgoff since that has the fake offset: */ 2561a29d85eSJan Kara pgoff = (vmf->address - vma->vm_start) >> PAGE_SHIFT; 257c8afe684SRob Clark 258871d812aSRob Clark pfn = page_to_pfn(pages[pgoff]); 259c8afe684SRob Clark 2601a29d85eSJan Kara VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address, 261c8afe684SRob Clark pfn, pfn << PAGE_SHIFT); 262c8afe684SRob Clark 263a5f74ec7SSouptick Joarder ret = vmf_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV)); 264c8afe684SRob Clark out_unlock: 2650e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 266c8afe684SRob Clark out: 267a5f74ec7SSouptick Joarder return ret; 268c8afe684SRob Clark } 269c8afe684SRob Clark 270c8afe684SRob Clark /** get mmap offset */ 271c8afe684SRob Clark static uint64_t mmap_offset(struct drm_gem_object *obj) 272c8afe684SRob Clark { 273c8afe684SRob Clark struct drm_device *dev = obj->dev; 2740e08270aSSushmita Susheelendra struct msm_gem_object *msm_obj = to_msm_bo(obj); 275c8afe684SRob Clark int ret; 276c8afe684SRob Clark 2770e08270aSSushmita Susheelendra WARN_ON(!mutex_is_locked(&msm_obj->lock)); 278c8afe684SRob Clark 279c8afe684SRob Clark /* Make it mmapable */ 280c8afe684SRob Clark ret = drm_gem_create_mmap_offset(obj); 281c8afe684SRob Clark 282c8afe684SRob Clark if (ret) { 2836a41da17SMamta Shukla DRM_DEV_ERROR(dev->dev, "could not allocate mmap offset\n"); 284c8afe684SRob Clark return 0; 285c8afe684SRob Clark } 286c8afe684SRob Clark 287c8afe684SRob Clark return drm_vma_node_offset_addr(&obj->vma_node); 288c8afe684SRob Clark } 289c8afe684SRob Clark 290c8afe684SRob Clark uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj) 291c8afe684SRob Clark { 292c8afe684SRob Clark uint64_t offset; 2930e08270aSSushmita Susheelendra struct msm_gem_object *msm_obj = to_msm_bo(obj); 2940e08270aSSushmita Susheelendra 2950e08270aSSushmita Susheelendra mutex_lock(&msm_obj->lock); 296c8afe684SRob Clark offset = mmap_offset(obj); 2970e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 298c8afe684SRob Clark return offset; 299c8afe684SRob Clark } 300c8afe684SRob Clark 3014b85f7f5SRob Clark static struct msm_gem_vma *add_vma(struct drm_gem_object *obj, 3024b85f7f5SRob Clark struct msm_gem_address_space *aspace) 3034b85f7f5SRob Clark { 3044b85f7f5SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 3054b85f7f5SRob Clark struct msm_gem_vma *vma; 3064b85f7f5SRob Clark 3070e08270aSSushmita Susheelendra WARN_ON(!mutex_is_locked(&msm_obj->lock)); 3080e08270aSSushmita Susheelendra 3094b85f7f5SRob Clark vma = kzalloc(sizeof(*vma), GFP_KERNEL); 3104b85f7f5SRob Clark if (!vma) 3114b85f7f5SRob Clark return ERR_PTR(-ENOMEM); 3124b85f7f5SRob Clark 3134b85f7f5SRob Clark vma->aspace = aspace; 3144b85f7f5SRob Clark 3154b85f7f5SRob Clark list_add_tail(&vma->list, &msm_obj->vmas); 3164b85f7f5SRob Clark 3174b85f7f5SRob Clark return vma; 3184b85f7f5SRob Clark } 3194b85f7f5SRob Clark 3204b85f7f5SRob Clark static struct msm_gem_vma *lookup_vma(struct drm_gem_object *obj, 3214b85f7f5SRob Clark struct msm_gem_address_space *aspace) 3224b85f7f5SRob Clark { 3234b85f7f5SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 3244b85f7f5SRob Clark struct msm_gem_vma *vma; 3254b85f7f5SRob Clark 3260e08270aSSushmita Susheelendra WARN_ON(!mutex_is_locked(&msm_obj->lock)); 3274b85f7f5SRob Clark 3284b85f7f5SRob Clark list_for_each_entry(vma, &msm_obj->vmas, list) { 3294b85f7f5SRob Clark if (vma->aspace == aspace) 3304b85f7f5SRob Clark return vma; 3314b85f7f5SRob Clark } 3324b85f7f5SRob Clark 3334b85f7f5SRob Clark return NULL; 3344b85f7f5SRob Clark } 3354b85f7f5SRob Clark 3364b85f7f5SRob Clark static void del_vma(struct msm_gem_vma *vma) 3374b85f7f5SRob Clark { 3384b85f7f5SRob Clark if (!vma) 3394b85f7f5SRob Clark return; 3404b85f7f5SRob Clark 3414b85f7f5SRob Clark list_del(&vma->list); 3424b85f7f5SRob Clark kfree(vma); 3434b85f7f5SRob Clark } 3444b85f7f5SRob Clark 3450e08270aSSushmita Susheelendra /* Called with msm_obj->lock locked */ 3464fe5f65eSRob Clark static void 3474fe5f65eSRob Clark put_iova(struct drm_gem_object *obj) 3484fe5f65eSRob Clark { 3494fe5f65eSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 3504b85f7f5SRob Clark struct msm_gem_vma *vma, *tmp; 3514fe5f65eSRob Clark 3520e08270aSSushmita Susheelendra WARN_ON(!mutex_is_locked(&msm_obj->lock)); 3534fe5f65eSRob Clark 3544b85f7f5SRob Clark list_for_each_entry_safe(vma, tmp, &msm_obj->vmas, list) { 3554b85f7f5SRob Clark msm_gem_unmap_vma(vma->aspace, vma, msm_obj->sgt); 3564b85f7f5SRob Clark del_vma(vma); 3574fe5f65eSRob Clark } 3584fe5f65eSRob Clark } 3594fe5f65eSRob Clark 3600e08270aSSushmita Susheelendra /* get iova, taking a reference. Should have a matching put */ 3610e08270aSSushmita Susheelendra int msm_gem_get_iova(struct drm_gem_object *obj, 3628bdcd949SRob Clark struct msm_gem_address_space *aspace, uint64_t *iova) 363c8afe684SRob Clark { 364c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 3654b85f7f5SRob Clark struct msm_gem_vma *vma; 366c8afe684SRob Clark int ret = 0; 367c8afe684SRob Clark 3680e08270aSSushmita Susheelendra mutex_lock(&msm_obj->lock); 3690e08270aSSushmita Susheelendra 3700e08270aSSushmita Susheelendra if (WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) { 3710e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 3720e08270aSSushmita Susheelendra return -EBUSY; 3730e08270aSSushmita Susheelendra } 374cb1e3818SRob Clark 3754b85f7f5SRob Clark vma = lookup_vma(obj, aspace); 376871d812aSRob Clark 3774b85f7f5SRob Clark if (!vma) { 3784b85f7f5SRob Clark struct page **pages; 379871d812aSRob Clark 3804b85f7f5SRob Clark vma = add_vma(obj, aspace); 38171e3dfa1SDan Carpenter if (IS_ERR(vma)) { 38271e3dfa1SDan Carpenter ret = PTR_ERR(vma); 38371e3dfa1SDan Carpenter goto unlock; 38471e3dfa1SDan Carpenter } 3854b85f7f5SRob Clark 3864b85f7f5SRob Clark pages = get_pages(obj); 3874b85f7f5SRob Clark if (IS_ERR(pages)) { 3884b85f7f5SRob Clark ret = PTR_ERR(pages); 3894b85f7f5SRob Clark goto fail; 390c8afe684SRob Clark } 391c8afe684SRob Clark 3924b85f7f5SRob Clark ret = msm_gem_map_vma(aspace, vma, msm_obj->sgt, 3934b85f7f5SRob Clark obj->size >> PAGE_SHIFT); 3944b85f7f5SRob Clark if (ret) 3954b85f7f5SRob Clark goto fail; 3964b85f7f5SRob Clark } 3974b85f7f5SRob Clark 3984b85f7f5SRob Clark *iova = vma->iova; 3990e08270aSSushmita Susheelendra 4000e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 4014b85f7f5SRob Clark return 0; 4024b85f7f5SRob Clark 4034b85f7f5SRob Clark fail: 4044b85f7f5SRob Clark del_vma(vma); 40571e3dfa1SDan Carpenter unlock: 4060e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 407c8afe684SRob Clark return ret; 408c8afe684SRob Clark } 409c8afe684SRob Clark 4102638d90aSRob Clark /* get iova without taking a reference, used in places where you have 4112638d90aSRob Clark * already done a 'msm_gem_get_iova()'. 4122638d90aSRob Clark */ 4138bdcd949SRob Clark uint64_t msm_gem_iova(struct drm_gem_object *obj, 4148bdcd949SRob Clark struct msm_gem_address_space *aspace) 4152638d90aSRob Clark { 4160e08270aSSushmita Susheelendra struct msm_gem_object *msm_obj = to_msm_bo(obj); 4174b85f7f5SRob Clark struct msm_gem_vma *vma; 4184b85f7f5SRob Clark 4190e08270aSSushmita Susheelendra mutex_lock(&msm_obj->lock); 4204b85f7f5SRob Clark vma = lookup_vma(obj, aspace); 4210e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 4224b85f7f5SRob Clark WARN_ON(!vma); 4234b85f7f5SRob Clark 4244b85f7f5SRob Clark return vma ? vma->iova : 0; 4252638d90aSRob Clark } 4262638d90aSRob Clark 4278bdcd949SRob Clark void msm_gem_put_iova(struct drm_gem_object *obj, 4288bdcd949SRob Clark struct msm_gem_address_space *aspace) 429c8afe684SRob Clark { 430c8afe684SRob Clark // XXX TODO .. 431c8afe684SRob Clark // NOTE: probably don't need a _locked() version.. we wouldn't 432c8afe684SRob Clark // normally unmap here, but instead just mark that it could be 433c8afe684SRob Clark // unmapped (if the iova refcnt drops to zero), but then later 434c8afe684SRob Clark // if another _get_iova_locked() fails we can start unmapping 435c8afe684SRob Clark // things that are no longer needed.. 436c8afe684SRob Clark } 437c8afe684SRob Clark 438c8afe684SRob Clark int msm_gem_dumb_create(struct drm_file *file, struct drm_device *dev, 439c8afe684SRob Clark struct drm_mode_create_dumb *args) 440c8afe684SRob Clark { 441c8afe684SRob Clark args->pitch = align_pitch(args->width, args->bpp); 442c8afe684SRob Clark args->size = PAGE_ALIGN(args->pitch * args->height); 443c8afe684SRob Clark return msm_gem_new_handle(dev, file, args->size, 444c8afe684SRob Clark MSM_BO_SCANOUT | MSM_BO_WC, &args->handle); 445c8afe684SRob Clark } 446c8afe684SRob Clark 447c8afe684SRob Clark int msm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev, 448c8afe684SRob Clark uint32_t handle, uint64_t *offset) 449c8afe684SRob Clark { 450c8afe684SRob Clark struct drm_gem_object *obj; 451c8afe684SRob Clark int ret = 0; 452c8afe684SRob Clark 453c8afe684SRob Clark /* GEM does all our handle to object mapping */ 454a8ad0bd8SChris Wilson obj = drm_gem_object_lookup(file, handle); 455c8afe684SRob Clark if (obj == NULL) { 456c8afe684SRob Clark ret = -ENOENT; 457c8afe684SRob Clark goto fail; 458c8afe684SRob Clark } 459c8afe684SRob Clark 460c8afe684SRob Clark *offset = msm_gem_mmap_offset(obj); 461c8afe684SRob Clark 462dc9a9b32SSteve Kowalik drm_gem_object_put_unlocked(obj); 463c8afe684SRob Clark 464c8afe684SRob Clark fail: 465c8afe684SRob Clark return ret; 466c8afe684SRob Clark } 467c8afe684SRob Clark 468fad33f4bSRob Clark static void *get_vaddr(struct drm_gem_object *obj, unsigned madv) 469c8afe684SRob Clark { 4700e08270aSSushmita Susheelendra struct msm_gem_object *msm_obj = to_msm_bo(obj); 4710e08270aSSushmita Susheelendra int ret = 0; 4720e08270aSSushmita Susheelendra 4730e08270aSSushmita Susheelendra mutex_lock(&msm_obj->lock); 4740e08270aSSushmita Susheelendra 475fad33f4bSRob Clark if (WARN_ON(msm_obj->madv > madv)) { 4766a41da17SMamta Shukla DRM_DEV_ERROR(obj->dev->dev, "Invalid madv state: %u vs %u\n", 477fad33f4bSRob Clark msm_obj->madv, madv); 4780e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 4790e08270aSSushmita Susheelendra return ERR_PTR(-EBUSY); 480c8afe684SRob Clark } 481c8afe684SRob Clark 4820e08270aSSushmita Susheelendra /* increment vmap_count *before* vmap() call, so shrinker can 4830e08270aSSushmita Susheelendra * check vmap_count (is_vunmapable()) outside of msm_obj->lock. 4840e08270aSSushmita Susheelendra * This guarantees that we won't try to msm_gem_vunmap() this 4850e08270aSSushmita Susheelendra * same object from within the vmap() call (while we already 4860e08270aSSushmita Susheelendra * hold msm_obj->lock) 4870e08270aSSushmita Susheelendra */ 4880e08270aSSushmita Susheelendra msm_obj->vmap_count++; 4890e08270aSSushmita Susheelendra 4900e08270aSSushmita Susheelendra if (!msm_obj->vaddr) { 4910e08270aSSushmita Susheelendra struct page **pages = get_pages(obj); 4920e08270aSSushmita Susheelendra if (IS_ERR(pages)) { 4930e08270aSSushmita Susheelendra ret = PTR_ERR(pages); 4940e08270aSSushmita Susheelendra goto fail; 4950e08270aSSushmita Susheelendra } 4960e08270aSSushmita Susheelendra msm_obj->vaddr = vmap(pages, obj->size >> PAGE_SHIFT, 4970e08270aSSushmita Susheelendra VM_MAP, pgprot_writecombine(PAGE_KERNEL)); 4980e08270aSSushmita Susheelendra if (msm_obj->vaddr == NULL) { 4990e08270aSSushmita Susheelendra ret = -ENOMEM; 5000e08270aSSushmita Susheelendra goto fail; 5010e08270aSSushmita Susheelendra } 5020e08270aSSushmita Susheelendra } 5030e08270aSSushmita Susheelendra 5040e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 5050e08270aSSushmita Susheelendra return msm_obj->vaddr; 5060e08270aSSushmita Susheelendra 5070e08270aSSushmita Susheelendra fail: 508e1e9db2cSRob Clark msm_obj->vmap_count--; 5090e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 5100e08270aSSushmita Susheelendra return ERR_PTR(ret); 51118f23049SRob Clark } 51218f23049SRob Clark 513fad33f4bSRob Clark void *msm_gem_get_vaddr(struct drm_gem_object *obj) 514fad33f4bSRob Clark { 515fad33f4bSRob Clark return get_vaddr(obj, MSM_MADV_WILLNEED); 516fad33f4bSRob Clark } 517fad33f4bSRob Clark 518fad33f4bSRob Clark /* 519fad33f4bSRob Clark * Don't use this! It is for the very special case of dumping 520fad33f4bSRob Clark * submits from GPU hangs or faults, were the bo may already 521fad33f4bSRob Clark * be MSM_MADV_DONTNEED, but we know the buffer is still on the 522fad33f4bSRob Clark * active list. 523fad33f4bSRob Clark */ 524fad33f4bSRob Clark void *msm_gem_get_vaddr_active(struct drm_gem_object *obj) 525fad33f4bSRob Clark { 526fad33f4bSRob Clark return get_vaddr(obj, __MSM_MADV_PURGED); 527fad33f4bSRob Clark } 528fad33f4bSRob Clark 52918f23049SRob Clark void msm_gem_put_vaddr(struct drm_gem_object *obj) 53018f23049SRob Clark { 5310e08270aSSushmita Susheelendra struct msm_gem_object *msm_obj = to_msm_bo(obj); 5320e08270aSSushmita Susheelendra 5330e08270aSSushmita Susheelendra mutex_lock(&msm_obj->lock); 5340e08270aSSushmita Susheelendra WARN_ON(msm_obj->vmap_count < 1); 5350e08270aSSushmita Susheelendra msm_obj->vmap_count--; 5360e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 53718f23049SRob Clark } 53818f23049SRob Clark 5394cd33c48SRob Clark /* Update madvise status, returns true if not purged, else 5404cd33c48SRob Clark * false or -errno. 5414cd33c48SRob Clark */ 5424cd33c48SRob Clark int msm_gem_madvise(struct drm_gem_object *obj, unsigned madv) 5434cd33c48SRob Clark { 5444cd33c48SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 5454cd33c48SRob Clark 5460e08270aSSushmita Susheelendra mutex_lock(&msm_obj->lock); 5470e08270aSSushmita Susheelendra 5484cd33c48SRob Clark WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); 5494cd33c48SRob Clark 5504cd33c48SRob Clark if (msm_obj->madv != __MSM_MADV_PURGED) 5514cd33c48SRob Clark msm_obj->madv = madv; 5524cd33c48SRob Clark 5530e08270aSSushmita Susheelendra madv = msm_obj->madv; 5540e08270aSSushmita Susheelendra 5550e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 5560e08270aSSushmita Susheelendra 5570e08270aSSushmita Susheelendra return (madv != __MSM_MADV_PURGED); 5584cd33c48SRob Clark } 5594cd33c48SRob Clark 5600e08270aSSushmita Susheelendra void msm_gem_purge(struct drm_gem_object *obj, enum msm_gem_lock subclass) 56168209390SRob Clark { 56268209390SRob Clark struct drm_device *dev = obj->dev; 56368209390SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 56468209390SRob Clark 56568209390SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 56668209390SRob Clark WARN_ON(!is_purgeable(msm_obj)); 56768209390SRob Clark WARN_ON(obj->import_attach); 56868209390SRob Clark 5690e08270aSSushmita Susheelendra mutex_lock_nested(&msm_obj->lock, subclass); 5700e08270aSSushmita Susheelendra 57168209390SRob Clark put_iova(obj); 57268209390SRob Clark 5730e08270aSSushmita Susheelendra msm_gem_vunmap_locked(obj); 57468209390SRob Clark 57568209390SRob Clark put_pages(obj); 57668209390SRob Clark 57768209390SRob Clark msm_obj->madv = __MSM_MADV_PURGED; 57868209390SRob Clark 57968209390SRob Clark drm_vma_node_unmap(&obj->vma_node, dev->anon_inode->i_mapping); 58068209390SRob Clark drm_gem_free_mmap_offset(obj); 58168209390SRob Clark 58268209390SRob Clark /* Our goal here is to return as much of the memory as 58368209390SRob Clark * is possible back to the system as we are called from OOM. 58468209390SRob Clark * To do this we must instruct the shmfs to drop all of its 58568209390SRob Clark * backing pages, *now*. 58668209390SRob Clark */ 58768209390SRob Clark shmem_truncate_range(file_inode(obj->filp), 0, (loff_t)-1); 58868209390SRob Clark 58968209390SRob Clark invalidate_mapping_pages(file_inode(obj->filp)->i_mapping, 59068209390SRob Clark 0, (loff_t)-1); 5910e08270aSSushmita Susheelendra 5920e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 59368209390SRob Clark } 59468209390SRob Clark 5950e08270aSSushmita Susheelendra static void msm_gem_vunmap_locked(struct drm_gem_object *obj) 596e1e9db2cSRob Clark { 597e1e9db2cSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 598e1e9db2cSRob Clark 5990e08270aSSushmita Susheelendra WARN_ON(!mutex_is_locked(&msm_obj->lock)); 6000e08270aSSushmita Susheelendra 601e1e9db2cSRob Clark if (!msm_obj->vaddr || WARN_ON(!is_vunmapable(msm_obj))) 602e1e9db2cSRob Clark return; 603e1e9db2cSRob Clark 604e1e9db2cSRob Clark vunmap(msm_obj->vaddr); 605e1e9db2cSRob Clark msm_obj->vaddr = NULL; 606e1e9db2cSRob Clark } 607e1e9db2cSRob Clark 6080e08270aSSushmita Susheelendra void msm_gem_vunmap(struct drm_gem_object *obj, enum msm_gem_lock subclass) 6090e08270aSSushmita Susheelendra { 6100e08270aSSushmita Susheelendra struct msm_gem_object *msm_obj = to_msm_bo(obj); 6110e08270aSSushmita Susheelendra 6120e08270aSSushmita Susheelendra mutex_lock_nested(&msm_obj->lock, subclass); 6130e08270aSSushmita Susheelendra msm_gem_vunmap_locked(obj); 6140e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 6150e08270aSSushmita Susheelendra } 6160e08270aSSushmita Susheelendra 617b6295f9aSRob Clark /* must be called before _move_to_active().. */ 618b6295f9aSRob Clark int msm_gem_sync_object(struct drm_gem_object *obj, 619b6295f9aSRob Clark struct msm_fence_context *fctx, bool exclusive) 620b6295f9aSRob Clark { 621b6295f9aSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 622b6295f9aSRob Clark struct reservation_object_list *fobj; 623f54d1867SChris Wilson struct dma_fence *fence; 624b6295f9aSRob Clark int i, ret; 625b6295f9aSRob Clark 626b6295f9aSRob Clark fobj = reservation_object_get_list(msm_obj->resv); 627b6295f9aSRob Clark if (!fobj || (fobj->shared_count == 0)) { 628b6295f9aSRob Clark fence = reservation_object_get_excl(msm_obj->resv); 629b6295f9aSRob Clark /* don't need to wait on our own fences, since ring is fifo */ 630b6295f9aSRob Clark if (fence && (fence->context != fctx->context)) { 631f54d1867SChris Wilson ret = dma_fence_wait(fence, true); 632b6295f9aSRob Clark if (ret) 633b6295f9aSRob Clark return ret; 634b6295f9aSRob Clark } 635b6295f9aSRob Clark } 636b6295f9aSRob Clark 637b6295f9aSRob Clark if (!exclusive || !fobj) 638b6295f9aSRob Clark return 0; 639b6295f9aSRob Clark 640b6295f9aSRob Clark for (i = 0; i < fobj->shared_count; i++) { 641b6295f9aSRob Clark fence = rcu_dereference_protected(fobj->shared[i], 642b6295f9aSRob Clark reservation_object_held(msm_obj->resv)); 643b6295f9aSRob Clark if (fence->context != fctx->context) { 644f54d1867SChris Wilson ret = dma_fence_wait(fence, true); 645b6295f9aSRob Clark if (ret) 646b6295f9aSRob Clark return ret; 647b6295f9aSRob Clark } 648b6295f9aSRob Clark } 649b6295f9aSRob Clark 650b6295f9aSRob Clark return 0; 651b6295f9aSRob Clark } 652b6295f9aSRob Clark 6537198e6b0SRob Clark void msm_gem_move_to_active(struct drm_gem_object *obj, 654f54d1867SChris Wilson struct msm_gpu *gpu, bool exclusive, struct dma_fence *fence) 6557198e6b0SRob Clark { 6567198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 6574cd33c48SRob Clark WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED); 6587198e6b0SRob Clark msm_obj->gpu = gpu; 659b6295f9aSRob Clark if (exclusive) 660b6295f9aSRob Clark reservation_object_add_excl_fence(msm_obj->resv, fence); 661bf6811f3SRob Clark else 662b6295f9aSRob Clark reservation_object_add_shared_fence(msm_obj->resv, fence); 6637198e6b0SRob Clark list_del_init(&msm_obj->mm_list); 6647198e6b0SRob Clark list_add_tail(&msm_obj->mm_list, &gpu->active_list); 6657198e6b0SRob Clark } 6667198e6b0SRob Clark 6677198e6b0SRob Clark void msm_gem_move_to_inactive(struct drm_gem_object *obj) 6687198e6b0SRob Clark { 6697198e6b0SRob Clark struct drm_device *dev = obj->dev; 6707198e6b0SRob Clark struct msm_drm_private *priv = dev->dev_private; 6717198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 6727198e6b0SRob Clark 6737198e6b0SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 6747198e6b0SRob Clark 6757198e6b0SRob Clark msm_obj->gpu = NULL; 6767198e6b0SRob Clark list_del_init(&msm_obj->mm_list); 6777198e6b0SRob Clark list_add_tail(&msm_obj->mm_list, &priv->inactive_list); 6787198e6b0SRob Clark } 6797198e6b0SRob Clark 680ba00c3f2SRob Clark int msm_gem_cpu_prep(struct drm_gem_object *obj, uint32_t op, ktime_t *timeout) 681ba00c3f2SRob Clark { 682b6295f9aSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 683b6295f9aSRob Clark bool write = !!(op & MSM_PREP_WRITE); 684f755e227SChris Wilson unsigned long remain = 685f755e227SChris Wilson op & MSM_PREP_NOSYNC ? 0 : timeout_to_jiffies(timeout); 686f755e227SChris Wilson long ret; 687b6295f9aSRob Clark 688b6295f9aSRob Clark ret = reservation_object_wait_timeout_rcu(msm_obj->resv, write, 689f755e227SChris Wilson true, remain); 690f755e227SChris Wilson if (ret == 0) 691f755e227SChris Wilson return remain == 0 ? -EBUSY : -ETIMEDOUT; 692f755e227SChris Wilson else if (ret < 0) 693f755e227SChris Wilson return ret; 694ba00c3f2SRob Clark 6957198e6b0SRob Clark /* TODO cache maintenance */ 6967198e6b0SRob Clark 697b6295f9aSRob Clark return 0; 6987198e6b0SRob Clark } 6997198e6b0SRob Clark 7007198e6b0SRob Clark int msm_gem_cpu_fini(struct drm_gem_object *obj) 7017198e6b0SRob Clark { 7027198e6b0SRob Clark /* TODO cache maintenance */ 703c8afe684SRob Clark return 0; 704c8afe684SRob Clark } 705c8afe684SRob Clark 706c8afe684SRob Clark #ifdef CONFIG_DEBUG_FS 707f54d1867SChris Wilson static void describe_fence(struct dma_fence *fence, const char *type, 708b6295f9aSRob Clark struct seq_file *m) 709b6295f9aSRob Clark { 710f54d1867SChris Wilson if (!dma_fence_is_signaled(fence)) 711b6295f9aSRob Clark seq_printf(m, "\t%9s: %s %s seq %u\n", type, 712b6295f9aSRob Clark fence->ops->get_driver_name(fence), 713b6295f9aSRob Clark fence->ops->get_timeline_name(fence), 714b6295f9aSRob Clark fence->seqno); 715b6295f9aSRob Clark } 716b6295f9aSRob Clark 717c8afe684SRob Clark void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m) 718c8afe684SRob Clark { 719c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 720b6295f9aSRob Clark struct reservation_object *robj = msm_obj->resv; 721b6295f9aSRob Clark struct reservation_object_list *fobj; 722f54d1867SChris Wilson struct dma_fence *fence; 7234b85f7f5SRob Clark struct msm_gem_vma *vma; 724c8afe684SRob Clark uint64_t off = drm_vma_node_start(&obj->vma_node); 7254cd33c48SRob Clark const char *madv; 726c8afe684SRob Clark 7270e08270aSSushmita Susheelendra mutex_lock(&msm_obj->lock); 728b6295f9aSRob Clark 7294cd33c48SRob Clark switch (msm_obj->madv) { 7304cd33c48SRob Clark case __MSM_MADV_PURGED: 7314cd33c48SRob Clark madv = " purged"; 7324cd33c48SRob Clark break; 7334cd33c48SRob Clark case MSM_MADV_DONTNEED: 7344cd33c48SRob Clark madv = " purgeable"; 7354cd33c48SRob Clark break; 7364cd33c48SRob Clark case MSM_MADV_WILLNEED: 7374cd33c48SRob Clark default: 7384cd33c48SRob Clark madv = ""; 7394cd33c48SRob Clark break; 7404cd33c48SRob Clark } 7414cd33c48SRob Clark 742667ce33eSRob Clark seq_printf(m, "%08x: %c %2d (%2d) %08llx %p\t", 7437198e6b0SRob Clark msm_obj->flags, is_active(msm_obj) ? 'A' : 'I', 7442c935bc5SPeter Zijlstra obj->name, kref_read(&obj->refcount), 745667ce33eSRob Clark off, msm_obj->vaddr); 746667ce33eSRob Clark 7474b85f7f5SRob Clark /* FIXME: we need to print the address space here too */ 7484b85f7f5SRob Clark list_for_each_entry(vma, &msm_obj->vmas, list) 7494b85f7f5SRob Clark seq_printf(m, " %08llx", vma->iova); 750667ce33eSRob Clark 751667ce33eSRob Clark seq_printf(m, " %zu%s\n", obj->size, madv); 752b6295f9aSRob Clark 753b6295f9aSRob Clark rcu_read_lock(); 754b6295f9aSRob Clark fobj = rcu_dereference(robj->fence); 755b6295f9aSRob Clark if (fobj) { 756b6295f9aSRob Clark unsigned int i, shared_count = fobj->shared_count; 757b6295f9aSRob Clark 758b6295f9aSRob Clark for (i = 0; i < shared_count; i++) { 759b6295f9aSRob Clark fence = rcu_dereference(fobj->shared[i]); 760b6295f9aSRob Clark describe_fence(fence, "Shared", m); 761b6295f9aSRob Clark } 762b6295f9aSRob Clark } 763b6295f9aSRob Clark 764b6295f9aSRob Clark fence = rcu_dereference(robj->fence_excl); 765b6295f9aSRob Clark if (fence) 766b6295f9aSRob Clark describe_fence(fence, "Exclusive", m); 767b6295f9aSRob Clark rcu_read_unlock(); 7680e08270aSSushmita Susheelendra 7690e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 770c8afe684SRob Clark } 771c8afe684SRob Clark 772c8afe684SRob Clark void msm_gem_describe_objects(struct list_head *list, struct seq_file *m) 773c8afe684SRob Clark { 774c8afe684SRob Clark struct msm_gem_object *msm_obj; 775c8afe684SRob Clark int count = 0; 776c8afe684SRob Clark size_t size = 0; 777c8afe684SRob Clark 778c8afe684SRob Clark list_for_each_entry(msm_obj, list, mm_list) { 779c8afe684SRob Clark struct drm_gem_object *obj = &msm_obj->base; 780c8afe684SRob Clark seq_printf(m, " "); 781c8afe684SRob Clark msm_gem_describe(obj, m); 782c8afe684SRob Clark count++; 783c8afe684SRob Clark size += obj->size; 784c8afe684SRob Clark } 785c8afe684SRob Clark 786c8afe684SRob Clark seq_printf(m, "Total %d objects, %zu bytes\n", count, size); 787c8afe684SRob Clark } 788c8afe684SRob Clark #endif 789c8afe684SRob Clark 790d71b6bd8SRob Clark /* don't call directly! Use drm_gem_object_put() and friends */ 791c8afe684SRob Clark void msm_gem_free_object(struct drm_gem_object *obj) 792c8afe684SRob Clark { 793c8afe684SRob Clark struct drm_device *dev = obj->dev; 794c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 795c8afe684SRob Clark 796c8afe684SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 797c8afe684SRob Clark 7987198e6b0SRob Clark /* object should not be on active list: */ 7997198e6b0SRob Clark WARN_ON(is_active(msm_obj)); 8007198e6b0SRob Clark 801c8afe684SRob Clark list_del(&msm_obj->mm_list); 802c8afe684SRob Clark 8030e08270aSSushmita Susheelendra mutex_lock(&msm_obj->lock); 8040e08270aSSushmita Susheelendra 8054fe5f65eSRob Clark put_iova(obj); 806c8afe684SRob Clark 80705b84911SRob Clark if (obj->import_attach) { 80805b84911SRob Clark if (msm_obj->vaddr) 80905b84911SRob Clark dma_buf_vunmap(obj->import_attach->dmabuf, msm_obj->vaddr); 81005b84911SRob Clark 81105b84911SRob Clark /* Don't drop the pages for imported dmabuf, as they are not 81205b84911SRob Clark * ours, just free the array we allocated: 81305b84911SRob Clark */ 81405b84911SRob Clark if (msm_obj->pages) 8152098105eSMichal Hocko kvfree(msm_obj->pages); 81605b84911SRob Clark 817f28730c8Sjilai wang drm_prime_gem_destroy(obj, msm_obj->sgt); 81805b84911SRob Clark } else { 8190e08270aSSushmita Susheelendra msm_gem_vunmap_locked(obj); 820c8afe684SRob Clark put_pages(obj); 82105b84911SRob Clark } 822c8afe684SRob Clark 8237198e6b0SRob Clark if (msm_obj->resv == &msm_obj->_resv) 8247198e6b0SRob Clark reservation_object_fini(msm_obj->resv); 8257198e6b0SRob Clark 826c8afe684SRob Clark drm_gem_object_release(obj); 827c8afe684SRob Clark 8280e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 829c8afe684SRob Clark kfree(msm_obj); 830c8afe684SRob Clark } 831c8afe684SRob Clark 832c8afe684SRob Clark /* convenience method to construct a GEM buffer object, and userspace handle */ 833c8afe684SRob Clark int msm_gem_new_handle(struct drm_device *dev, struct drm_file *file, 834c8afe684SRob Clark uint32_t size, uint32_t flags, uint32_t *handle) 835c8afe684SRob Clark { 836c8afe684SRob Clark struct drm_gem_object *obj; 837c8afe684SRob Clark int ret; 838c8afe684SRob Clark 839c8afe684SRob Clark obj = msm_gem_new(dev, size, flags); 840c8afe684SRob Clark 841c8afe684SRob Clark if (IS_ERR(obj)) 842c8afe684SRob Clark return PTR_ERR(obj); 843c8afe684SRob Clark 844c8afe684SRob Clark ret = drm_gem_handle_create(file, obj, handle); 845c8afe684SRob Clark 846c8afe684SRob Clark /* drop reference from allocate - handle holds it now */ 847dc9a9b32SSteve Kowalik drm_gem_object_put_unlocked(obj); 848c8afe684SRob Clark 849c8afe684SRob Clark return ret; 850c8afe684SRob Clark } 851c8afe684SRob Clark 85205b84911SRob Clark static int msm_gem_new_impl(struct drm_device *dev, 85305b84911SRob Clark uint32_t size, uint32_t flags, 85479f0e202SRob Clark struct reservation_object *resv, 8550e08270aSSushmita Susheelendra struct drm_gem_object **obj, 8560e08270aSSushmita Susheelendra bool struct_mutex_locked) 857c8afe684SRob Clark { 858c8afe684SRob Clark struct msm_drm_private *priv = dev->dev_private; 859c8afe684SRob Clark struct msm_gem_object *msm_obj; 860c8afe684SRob Clark 861c8afe684SRob Clark switch (flags & MSM_BO_CACHE_MASK) { 862c8afe684SRob Clark case MSM_BO_UNCACHED: 863c8afe684SRob Clark case MSM_BO_CACHED: 864c8afe684SRob Clark case MSM_BO_WC: 865c8afe684SRob Clark break; 866c8afe684SRob Clark default: 8676a41da17SMamta Shukla DRM_DEV_ERROR(dev->dev, "invalid cache flag: %x\n", 868c8afe684SRob Clark (flags & MSM_BO_CACHE_MASK)); 86905b84911SRob Clark return -EINVAL; 870c8afe684SRob Clark } 871c8afe684SRob Clark 872667ce33eSRob Clark msm_obj = kzalloc(sizeof(*msm_obj), GFP_KERNEL); 87305b84911SRob Clark if (!msm_obj) 87405b84911SRob Clark return -ENOMEM; 875c8afe684SRob Clark 8760e08270aSSushmita Susheelendra mutex_init(&msm_obj->lock); 8770e08270aSSushmita Susheelendra 878c8afe684SRob Clark msm_obj->flags = flags; 8794cd33c48SRob Clark msm_obj->madv = MSM_MADV_WILLNEED; 880c8afe684SRob Clark 88179f0e202SRob Clark if (resv) { 88279f0e202SRob Clark msm_obj->resv = resv; 88379f0e202SRob Clark } else { 8847198e6b0SRob Clark msm_obj->resv = &msm_obj->_resv; 8857198e6b0SRob Clark reservation_object_init(msm_obj->resv); 88679f0e202SRob Clark } 887c8afe684SRob Clark 8887198e6b0SRob Clark INIT_LIST_HEAD(&msm_obj->submit_entry); 8894b85f7f5SRob Clark INIT_LIST_HEAD(&msm_obj->vmas); 8904b85f7f5SRob Clark 8910e08270aSSushmita Susheelendra if (struct_mutex_locked) { 8920e08270aSSushmita Susheelendra WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 893c8afe684SRob Clark list_add_tail(&msm_obj->mm_list, &priv->inactive_list); 8940e08270aSSushmita Susheelendra } else { 8950e08270aSSushmita Susheelendra mutex_lock(&dev->struct_mutex); 8960e08270aSSushmita Susheelendra list_add_tail(&msm_obj->mm_list, &priv->inactive_list); 8970e08270aSSushmita Susheelendra mutex_unlock(&dev->struct_mutex); 8980e08270aSSushmita Susheelendra } 899c8afe684SRob Clark 90005b84911SRob Clark *obj = &msm_obj->base; 90105b84911SRob Clark 90205b84911SRob Clark return 0; 90305b84911SRob Clark } 90405b84911SRob Clark 9050e08270aSSushmita Susheelendra static struct drm_gem_object *_msm_gem_new(struct drm_device *dev, 9060e08270aSSushmita Susheelendra uint32_t size, uint32_t flags, bool struct_mutex_locked) 90705b84911SRob Clark { 908f4839bd5SRob Clark struct msm_drm_private *priv = dev->dev_private; 909871d812aSRob Clark struct drm_gem_object *obj = NULL; 910f4839bd5SRob Clark bool use_vram = false; 91105b84911SRob Clark int ret; 91205b84911SRob Clark 91305b84911SRob Clark size = PAGE_ALIGN(size); 91405b84911SRob Clark 915f4839bd5SRob Clark if (!iommu_present(&platform_bus_type)) 916f4839bd5SRob Clark use_vram = true; 917f4839bd5SRob Clark else if ((flags & MSM_BO_STOLEN) && priv->vram.size) 918f4839bd5SRob Clark use_vram = true; 919f4839bd5SRob Clark 920f4839bd5SRob Clark if (WARN_ON(use_vram && !priv->vram.size)) 921f4839bd5SRob Clark return ERR_PTR(-EINVAL); 922f4839bd5SRob Clark 9231a5dff5dSJordan Crouse /* Disallow zero sized objects as they make the underlying 9241a5dff5dSJordan Crouse * infrastructure grumpy 9251a5dff5dSJordan Crouse */ 9261a5dff5dSJordan Crouse if (size == 0) 9271a5dff5dSJordan Crouse return ERR_PTR(-EINVAL); 9281a5dff5dSJordan Crouse 9290e08270aSSushmita Susheelendra ret = msm_gem_new_impl(dev, size, flags, NULL, &obj, struct_mutex_locked); 93005b84911SRob Clark if (ret) 93105b84911SRob Clark goto fail; 93205b84911SRob Clark 933f4839bd5SRob Clark if (use_vram) { 9344b85f7f5SRob Clark struct msm_gem_vma *vma; 935f4839bd5SRob Clark struct page **pages; 936b3949a9aSHans Verkuil struct msm_gem_object *msm_obj = to_msm_bo(obj); 937b3949a9aSHans Verkuil 938b3949a9aSHans Verkuil mutex_lock(&msm_obj->lock); 939f4839bd5SRob Clark 9404b85f7f5SRob Clark vma = add_vma(obj, NULL); 941b3949a9aSHans Verkuil mutex_unlock(&msm_obj->lock); 9424b85f7f5SRob Clark if (IS_ERR(vma)) { 9434b85f7f5SRob Clark ret = PTR_ERR(vma); 9444b85f7f5SRob Clark goto fail; 9454b85f7f5SRob Clark } 9464b85f7f5SRob Clark 9474b85f7f5SRob Clark to_msm_bo(obj)->vram_node = &vma->node; 9484b85f7f5SRob Clark 949f4839bd5SRob Clark drm_gem_private_object_init(dev, obj, size); 950f4839bd5SRob Clark 951f4839bd5SRob Clark pages = get_pages(obj); 952f4839bd5SRob Clark if (IS_ERR(pages)) { 953f4839bd5SRob Clark ret = PTR_ERR(pages); 954f4839bd5SRob Clark goto fail; 955f4839bd5SRob Clark } 9564b85f7f5SRob Clark 9574b85f7f5SRob Clark vma->iova = physaddr(obj); 958f4839bd5SRob Clark } else { 95905b84911SRob Clark ret = drm_gem_object_init(dev, obj, size); 96005b84911SRob Clark if (ret) 96105b84911SRob Clark goto fail; 962871d812aSRob Clark } 96305b84911SRob Clark 96405b84911SRob Clark return obj; 96505b84911SRob Clark 96605b84911SRob Clark fail: 967dc9a9b32SSteve Kowalik drm_gem_object_put_unlocked(obj); 96805b84911SRob Clark return ERR_PTR(ret); 96905b84911SRob Clark } 97005b84911SRob Clark 9710e08270aSSushmita Susheelendra struct drm_gem_object *msm_gem_new_locked(struct drm_device *dev, 9720e08270aSSushmita Susheelendra uint32_t size, uint32_t flags) 9730e08270aSSushmita Susheelendra { 9740e08270aSSushmita Susheelendra return _msm_gem_new(dev, size, flags, true); 9750e08270aSSushmita Susheelendra } 9760e08270aSSushmita Susheelendra 9770e08270aSSushmita Susheelendra struct drm_gem_object *msm_gem_new(struct drm_device *dev, 9780e08270aSSushmita Susheelendra uint32_t size, uint32_t flags) 9790e08270aSSushmita Susheelendra { 9800e08270aSSushmita Susheelendra return _msm_gem_new(dev, size, flags, false); 9810e08270aSSushmita Susheelendra } 9820e08270aSSushmita Susheelendra 98305b84911SRob Clark struct drm_gem_object *msm_gem_import(struct drm_device *dev, 98479f0e202SRob Clark struct dma_buf *dmabuf, struct sg_table *sgt) 98505b84911SRob Clark { 98605b84911SRob Clark struct msm_gem_object *msm_obj; 98705b84911SRob Clark struct drm_gem_object *obj; 98879f0e202SRob Clark uint32_t size; 98905b84911SRob Clark int ret, npages; 99005b84911SRob Clark 991871d812aSRob Clark /* if we don't have IOMMU, don't bother pretending we can import: */ 992871d812aSRob Clark if (!iommu_present(&platform_bus_type)) { 9936a41da17SMamta Shukla DRM_DEV_ERROR(dev->dev, "cannot import without IOMMU\n"); 994871d812aSRob Clark return ERR_PTR(-EINVAL); 995871d812aSRob Clark } 996871d812aSRob Clark 99779f0e202SRob Clark size = PAGE_ALIGN(dmabuf->size); 99805b84911SRob Clark 9990e08270aSSushmita Susheelendra ret = msm_gem_new_impl(dev, size, MSM_BO_WC, dmabuf->resv, &obj, false); 100005b84911SRob Clark if (ret) 100105b84911SRob Clark goto fail; 100205b84911SRob Clark 100305b84911SRob Clark drm_gem_private_object_init(dev, obj, size); 100405b84911SRob Clark 100505b84911SRob Clark npages = size / PAGE_SIZE; 100605b84911SRob Clark 100705b84911SRob Clark msm_obj = to_msm_bo(obj); 10080e08270aSSushmita Susheelendra mutex_lock(&msm_obj->lock); 100905b84911SRob Clark msm_obj->sgt = sgt; 10102098105eSMichal Hocko msm_obj->pages = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL); 101105b84911SRob Clark if (!msm_obj->pages) { 10120e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 101305b84911SRob Clark ret = -ENOMEM; 101405b84911SRob Clark goto fail; 101505b84911SRob Clark } 101605b84911SRob Clark 101705b84911SRob Clark ret = drm_prime_sg_to_page_addr_arrays(sgt, msm_obj->pages, NULL, npages); 10180e08270aSSushmita Susheelendra if (ret) { 10190e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 102005b84911SRob Clark goto fail; 10210e08270aSSushmita Susheelendra } 102205b84911SRob Clark 10230e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 1024c8afe684SRob Clark return obj; 1025c8afe684SRob Clark 1026c8afe684SRob Clark fail: 1027dc9a9b32SSteve Kowalik drm_gem_object_put_unlocked(obj); 1028c8afe684SRob Clark return ERR_PTR(ret); 1029c8afe684SRob Clark } 10308223286dSJordan Crouse 10318223286dSJordan Crouse static void *_msm_gem_kernel_new(struct drm_device *dev, uint32_t size, 10328223286dSJordan Crouse uint32_t flags, struct msm_gem_address_space *aspace, 10338223286dSJordan Crouse struct drm_gem_object **bo, uint64_t *iova, bool locked) 10348223286dSJordan Crouse { 10358223286dSJordan Crouse void *vaddr; 10368223286dSJordan Crouse struct drm_gem_object *obj = _msm_gem_new(dev, size, flags, locked); 10378223286dSJordan Crouse int ret; 10388223286dSJordan Crouse 10398223286dSJordan Crouse if (IS_ERR(obj)) 10408223286dSJordan Crouse return ERR_CAST(obj); 10418223286dSJordan Crouse 10428223286dSJordan Crouse if (iova) { 10438223286dSJordan Crouse ret = msm_gem_get_iova(obj, aspace, iova); 10448223286dSJordan Crouse if (ret) { 1045dc9a9b32SSteve Kowalik drm_gem_object_put(obj); 10468223286dSJordan Crouse return ERR_PTR(ret); 10478223286dSJordan Crouse } 10488223286dSJordan Crouse } 10498223286dSJordan Crouse 10508223286dSJordan Crouse vaddr = msm_gem_get_vaddr(obj); 1051c9811d0fSWei Yongjun if (IS_ERR(vaddr)) { 10528223286dSJordan Crouse msm_gem_put_iova(obj, aspace); 1053dc9a9b32SSteve Kowalik drm_gem_object_put(obj); 1054c9811d0fSWei Yongjun return ERR_CAST(vaddr); 10558223286dSJordan Crouse } 10568223286dSJordan Crouse 10578223286dSJordan Crouse if (bo) 10588223286dSJordan Crouse *bo = obj; 10598223286dSJordan Crouse 10608223286dSJordan Crouse return vaddr; 10618223286dSJordan Crouse } 10628223286dSJordan Crouse 10638223286dSJordan Crouse void *msm_gem_kernel_new(struct drm_device *dev, uint32_t size, 10648223286dSJordan Crouse uint32_t flags, struct msm_gem_address_space *aspace, 10658223286dSJordan Crouse struct drm_gem_object **bo, uint64_t *iova) 10668223286dSJordan Crouse { 10678223286dSJordan Crouse return _msm_gem_kernel_new(dev, size, flags, aspace, bo, iova, false); 10688223286dSJordan Crouse } 10698223286dSJordan Crouse 10708223286dSJordan Crouse void *msm_gem_kernel_new_locked(struct drm_device *dev, uint32_t size, 10718223286dSJordan Crouse uint32_t flags, struct msm_gem_address_space *aspace, 10728223286dSJordan Crouse struct drm_gem_object **bo, uint64_t *iova) 10738223286dSJordan Crouse { 10748223286dSJordan Crouse return _msm_gem_kernel_new(dev, size, flags, aspace, bo, iova, true); 10758223286dSJordan Crouse } 1076