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)) { 91c8afe684SRob Clark dev_err(dev->dev, "could not get pages: %ld\n", 92c8afe684SRob Clark PTR_ERR(p)); 93c8afe684SRob Clark return p; 94c8afe684SRob Clark } 95c8afe684SRob Clark 96c8afe684SRob Clark msm_obj->sgt = drm_prime_pages_to_sg(p, npages); 971f70e079SWei Yongjun if (IS_ERR(msm_obj->sgt)) { 98c8afe684SRob Clark dev_err(dev->dev, "failed to allocate sgt\n"); 991f70e079SWei Yongjun return ERR_CAST(msm_obj->sgt); 100c8afe684SRob Clark } 101c8afe684SRob Clark 102c8afe684SRob Clark msm_obj->pages = p; 103c8afe684SRob Clark 104c8afe684SRob Clark /* For non-cached buffers, ensure the new pages are clean 105c8afe684SRob Clark * because display controller, GPU, etc. are not coherent: 106c8afe684SRob Clark */ 107c8afe684SRob Clark if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED)) 108c8afe684SRob Clark dma_map_sg(dev->dev, msm_obj->sgt->sgl, 109c8afe684SRob Clark msm_obj->sgt->nents, DMA_BIDIRECTIONAL); 110c8afe684SRob Clark } 111c8afe684SRob Clark 112c8afe684SRob Clark return msm_obj->pages; 113c8afe684SRob Clark } 114c8afe684SRob Clark 1150e08270aSSushmita Susheelendra static void put_pages_vram(struct drm_gem_object *obj) 1160e08270aSSushmita Susheelendra { 1170e08270aSSushmita Susheelendra struct msm_gem_object *msm_obj = to_msm_bo(obj); 1180e08270aSSushmita Susheelendra struct msm_drm_private *priv = obj->dev->dev_private; 1190e08270aSSushmita Susheelendra 1200e08270aSSushmita Susheelendra spin_lock(&priv->vram.lock); 1210e08270aSSushmita Susheelendra drm_mm_remove_node(msm_obj->vram_node); 1220e08270aSSushmita Susheelendra spin_unlock(&priv->vram.lock); 1230e08270aSSushmita Susheelendra 1240e08270aSSushmita Susheelendra kvfree(msm_obj->pages); 1250e08270aSSushmita Susheelendra } 1260e08270aSSushmita Susheelendra 127c8afe684SRob Clark static void put_pages(struct drm_gem_object *obj) 128c8afe684SRob Clark { 129c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 130c8afe684SRob Clark 131c8afe684SRob Clark if (msm_obj->pages) { 132c8afe684SRob Clark /* For non-cached buffers, ensure the new pages are clean 133c8afe684SRob Clark * because display controller, GPU, etc. are not coherent: 134c8afe684SRob Clark */ 135c8afe684SRob Clark if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED)) 136c8afe684SRob Clark dma_unmap_sg(obj->dev->dev, msm_obj->sgt->sgl, 137c8afe684SRob Clark msm_obj->sgt->nents, DMA_BIDIRECTIONAL); 138c8afe684SRob Clark sg_free_table(msm_obj->sgt); 139c8afe684SRob Clark kfree(msm_obj->sgt); 140c8afe684SRob Clark 141072f1f91SRob Clark if (use_pages(obj)) 142c8afe684SRob Clark drm_gem_put_pages(obj, msm_obj->pages, true, false); 1430e08270aSSushmita Susheelendra else 1440e08270aSSushmita Susheelendra put_pages_vram(obj); 145871d812aSRob Clark 146c8afe684SRob Clark msm_obj->pages = NULL; 147c8afe684SRob Clark } 148c8afe684SRob Clark } 149c8afe684SRob Clark 15005b84911SRob Clark struct page **msm_gem_get_pages(struct drm_gem_object *obj) 15105b84911SRob Clark { 1520e08270aSSushmita Susheelendra struct msm_gem_object *msm_obj = to_msm_bo(obj); 15305b84911SRob Clark struct page **p; 1540e08270aSSushmita Susheelendra 1550e08270aSSushmita Susheelendra mutex_lock(&msm_obj->lock); 1560e08270aSSushmita Susheelendra 1570e08270aSSushmita Susheelendra if (WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) { 1580e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 1590e08270aSSushmita Susheelendra return ERR_PTR(-EBUSY); 1600e08270aSSushmita Susheelendra } 1610e08270aSSushmita Susheelendra 16205b84911SRob Clark p = get_pages(obj); 1630e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 16405b84911SRob Clark return p; 16505b84911SRob Clark } 16605b84911SRob Clark 16705b84911SRob Clark void msm_gem_put_pages(struct drm_gem_object *obj) 16805b84911SRob Clark { 16905b84911SRob Clark /* when we start tracking the pin count, then do something here */ 17005b84911SRob Clark } 17105b84911SRob Clark 172c8afe684SRob Clark int msm_gem_mmap_obj(struct drm_gem_object *obj, 173c8afe684SRob Clark struct vm_area_struct *vma) 174c8afe684SRob Clark { 175c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 176c8afe684SRob Clark 177c8afe684SRob Clark vma->vm_flags &= ~VM_PFNMAP; 178c8afe684SRob Clark vma->vm_flags |= VM_MIXEDMAP; 179c8afe684SRob Clark 180c8afe684SRob Clark if (msm_obj->flags & MSM_BO_WC) { 181c8afe684SRob Clark vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); 182c8afe684SRob Clark } else if (msm_obj->flags & MSM_BO_UNCACHED) { 183c8afe684SRob Clark vma->vm_page_prot = pgprot_noncached(vm_get_page_prot(vma->vm_flags)); 184c8afe684SRob Clark } else { 185c8afe684SRob Clark /* 186c8afe684SRob Clark * Shunt off cached objs to shmem file so they have their own 187c8afe684SRob Clark * address_space (so unmap_mapping_range does what we want, 188c8afe684SRob Clark * in particular in the case of mmap'd dmabufs) 189c8afe684SRob Clark */ 190c8afe684SRob Clark fput(vma->vm_file); 191c8afe684SRob Clark get_file(obj->filp); 192c8afe684SRob Clark vma->vm_pgoff = 0; 193c8afe684SRob Clark vma->vm_file = obj->filp; 194c8afe684SRob Clark 195c8afe684SRob Clark vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); 196c8afe684SRob Clark } 197c8afe684SRob Clark 198c8afe684SRob Clark return 0; 199c8afe684SRob Clark } 200c8afe684SRob Clark 201c8afe684SRob Clark int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma) 202c8afe684SRob Clark { 203c8afe684SRob Clark int ret; 204c8afe684SRob Clark 205c8afe684SRob Clark ret = drm_gem_mmap(filp, vma); 206c8afe684SRob Clark if (ret) { 207c8afe684SRob Clark DBG("mmap failed: %d", ret); 208c8afe684SRob Clark return ret; 209c8afe684SRob Clark } 210c8afe684SRob Clark 211c8afe684SRob Clark return msm_gem_mmap_obj(vma->vm_private_data, vma); 212c8afe684SRob Clark } 213c8afe684SRob Clark 21411bac800SDave Jiang int msm_gem_fault(struct vm_fault *vmf) 215c8afe684SRob Clark { 21611bac800SDave Jiang struct vm_area_struct *vma = vmf->vma; 217c8afe684SRob Clark struct drm_gem_object *obj = vma->vm_private_data; 2180e08270aSSushmita Susheelendra struct msm_gem_object *msm_obj = to_msm_bo(obj); 219c8afe684SRob Clark struct page **pages; 220c8afe684SRob Clark unsigned long pfn; 221c8afe684SRob Clark pgoff_t pgoff; 222c8afe684SRob Clark int ret; 223c8afe684SRob Clark 2240e08270aSSushmita Susheelendra /* 2250e08270aSSushmita Susheelendra * vm_ops.open/drm_gem_mmap_obj and close get and put 2260e08270aSSushmita Susheelendra * a reference on obj. So, we dont need to hold one here. 227d78d383aSRob Clark */ 2280e08270aSSushmita Susheelendra ret = mutex_lock_interruptible(&msm_obj->lock); 229c8afe684SRob Clark if (ret) 230c8afe684SRob Clark goto out; 231c8afe684SRob Clark 2320e08270aSSushmita Susheelendra if (WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) { 2330e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 2340e08270aSSushmita Susheelendra return VM_FAULT_SIGBUS; 2350e08270aSSushmita Susheelendra } 2360e08270aSSushmita Susheelendra 237c8afe684SRob Clark /* make sure we have pages attached now */ 238c8afe684SRob Clark pages = get_pages(obj); 239c8afe684SRob Clark if (IS_ERR(pages)) { 240c8afe684SRob Clark ret = PTR_ERR(pages); 241c8afe684SRob Clark goto out_unlock; 242c8afe684SRob Clark } 243c8afe684SRob Clark 244c8afe684SRob Clark /* We don't use vmf->pgoff since that has the fake offset: */ 2451a29d85eSJan Kara pgoff = (vmf->address - vma->vm_start) >> PAGE_SHIFT; 246c8afe684SRob Clark 247871d812aSRob Clark pfn = page_to_pfn(pages[pgoff]); 248c8afe684SRob Clark 2491a29d85eSJan Kara VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address, 250c8afe684SRob Clark pfn, pfn << PAGE_SHIFT); 251c8afe684SRob Clark 2521a29d85eSJan Kara ret = vm_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV)); 253c8afe684SRob Clark 254c8afe684SRob Clark out_unlock: 2550e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 256c8afe684SRob Clark out: 257c8afe684SRob Clark switch (ret) { 258c8afe684SRob Clark case -EAGAIN: 259c8afe684SRob Clark case 0: 260c8afe684SRob Clark case -ERESTARTSYS: 261c8afe684SRob Clark case -EINTR: 262505886d5SRob Clark case -EBUSY: 263505886d5SRob Clark /* 264505886d5SRob Clark * EBUSY is ok: this just means that another thread 265505886d5SRob Clark * already did the job. 266505886d5SRob Clark */ 267c8afe684SRob Clark return VM_FAULT_NOPAGE; 268c8afe684SRob Clark case -ENOMEM: 269c8afe684SRob Clark return VM_FAULT_OOM; 270c8afe684SRob Clark default: 271c8afe684SRob Clark return VM_FAULT_SIGBUS; 272c8afe684SRob Clark } 273c8afe684SRob Clark } 274c8afe684SRob Clark 275c8afe684SRob Clark /** get mmap offset */ 276c8afe684SRob Clark static uint64_t mmap_offset(struct drm_gem_object *obj) 277c8afe684SRob Clark { 278c8afe684SRob Clark struct drm_device *dev = obj->dev; 2790e08270aSSushmita Susheelendra struct msm_gem_object *msm_obj = to_msm_bo(obj); 280c8afe684SRob Clark int ret; 281c8afe684SRob Clark 2820e08270aSSushmita Susheelendra WARN_ON(!mutex_is_locked(&msm_obj->lock)); 283c8afe684SRob Clark 284c8afe684SRob Clark /* Make it mmapable */ 285c8afe684SRob Clark ret = drm_gem_create_mmap_offset(obj); 286c8afe684SRob Clark 287c8afe684SRob Clark if (ret) { 288c8afe684SRob Clark dev_err(dev->dev, "could not allocate mmap offset\n"); 289c8afe684SRob Clark return 0; 290c8afe684SRob Clark } 291c8afe684SRob Clark 292c8afe684SRob Clark return drm_vma_node_offset_addr(&obj->vma_node); 293c8afe684SRob Clark } 294c8afe684SRob Clark 295c8afe684SRob Clark uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj) 296c8afe684SRob Clark { 297c8afe684SRob Clark uint64_t offset; 2980e08270aSSushmita Susheelendra struct msm_gem_object *msm_obj = to_msm_bo(obj); 2990e08270aSSushmita Susheelendra 3000e08270aSSushmita Susheelendra mutex_lock(&msm_obj->lock); 301c8afe684SRob Clark offset = mmap_offset(obj); 3020e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 303c8afe684SRob Clark return offset; 304c8afe684SRob Clark } 305c8afe684SRob Clark 3064b85f7f5SRob Clark static struct msm_gem_vma *add_vma(struct drm_gem_object *obj, 3074b85f7f5SRob Clark struct msm_gem_address_space *aspace) 3084b85f7f5SRob Clark { 3094b85f7f5SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 3104b85f7f5SRob Clark struct msm_gem_vma *vma; 3114b85f7f5SRob Clark 3120e08270aSSushmita Susheelendra WARN_ON(!mutex_is_locked(&msm_obj->lock)); 3130e08270aSSushmita Susheelendra 3144b85f7f5SRob Clark vma = kzalloc(sizeof(*vma), GFP_KERNEL); 3154b85f7f5SRob Clark if (!vma) 3164b85f7f5SRob Clark return ERR_PTR(-ENOMEM); 3174b85f7f5SRob Clark 3184b85f7f5SRob Clark vma->aspace = aspace; 3194b85f7f5SRob Clark 3204b85f7f5SRob Clark list_add_tail(&vma->list, &msm_obj->vmas); 3214b85f7f5SRob Clark 3224b85f7f5SRob Clark return vma; 3234b85f7f5SRob Clark } 3244b85f7f5SRob Clark 3254b85f7f5SRob Clark static struct msm_gem_vma *lookup_vma(struct drm_gem_object *obj, 3264b85f7f5SRob Clark struct msm_gem_address_space *aspace) 3274b85f7f5SRob Clark { 3284b85f7f5SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 3294b85f7f5SRob Clark struct msm_gem_vma *vma; 3304b85f7f5SRob Clark 3310e08270aSSushmita Susheelendra WARN_ON(!mutex_is_locked(&msm_obj->lock)); 3324b85f7f5SRob Clark 3334b85f7f5SRob Clark list_for_each_entry(vma, &msm_obj->vmas, list) { 3344b85f7f5SRob Clark if (vma->aspace == aspace) 3354b85f7f5SRob Clark return vma; 3364b85f7f5SRob Clark } 3374b85f7f5SRob Clark 3384b85f7f5SRob Clark return NULL; 3394b85f7f5SRob Clark } 3404b85f7f5SRob Clark 3414b85f7f5SRob Clark static void del_vma(struct msm_gem_vma *vma) 3424b85f7f5SRob Clark { 3434b85f7f5SRob Clark if (!vma) 3444b85f7f5SRob Clark return; 3454b85f7f5SRob Clark 3464b85f7f5SRob Clark list_del(&vma->list); 3474b85f7f5SRob Clark kfree(vma); 3484b85f7f5SRob Clark } 3494b85f7f5SRob Clark 3500e08270aSSushmita Susheelendra /* Called with msm_obj->lock locked */ 3514fe5f65eSRob Clark static void 3524fe5f65eSRob Clark put_iova(struct drm_gem_object *obj) 3534fe5f65eSRob Clark { 3544fe5f65eSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 3554b85f7f5SRob Clark struct msm_gem_vma *vma, *tmp; 3564fe5f65eSRob Clark 3570e08270aSSushmita Susheelendra WARN_ON(!mutex_is_locked(&msm_obj->lock)); 3584fe5f65eSRob Clark 3594b85f7f5SRob Clark list_for_each_entry_safe(vma, tmp, &msm_obj->vmas, list) { 3604b85f7f5SRob Clark msm_gem_unmap_vma(vma->aspace, vma, msm_obj->sgt); 3614b85f7f5SRob Clark del_vma(vma); 3624fe5f65eSRob Clark } 3634fe5f65eSRob Clark } 3644fe5f65eSRob Clark 3650e08270aSSushmita Susheelendra /* get iova, taking a reference. Should have a matching put */ 3660e08270aSSushmita Susheelendra int msm_gem_get_iova(struct drm_gem_object *obj, 3678bdcd949SRob Clark struct msm_gem_address_space *aspace, uint64_t *iova) 368c8afe684SRob Clark { 369c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 3704b85f7f5SRob Clark struct msm_gem_vma *vma; 371c8afe684SRob Clark int ret = 0; 372c8afe684SRob Clark 3730e08270aSSushmita Susheelendra mutex_lock(&msm_obj->lock); 3740e08270aSSushmita Susheelendra 3750e08270aSSushmita Susheelendra if (WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) { 3760e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 3770e08270aSSushmita Susheelendra return -EBUSY; 3780e08270aSSushmita Susheelendra } 379cb1e3818SRob Clark 3804b85f7f5SRob Clark vma = lookup_vma(obj, aspace); 381871d812aSRob Clark 3824b85f7f5SRob Clark if (!vma) { 3834b85f7f5SRob Clark struct page **pages; 384871d812aSRob Clark 3854b85f7f5SRob Clark vma = add_vma(obj, aspace); 3864b85f7f5SRob Clark if (IS_ERR(vma)) 3874b85f7f5SRob Clark return PTR_ERR(vma); 3884b85f7f5SRob Clark 3894b85f7f5SRob Clark pages = get_pages(obj); 3904b85f7f5SRob Clark if (IS_ERR(pages)) { 3914b85f7f5SRob Clark ret = PTR_ERR(pages); 3924b85f7f5SRob Clark goto fail; 393c8afe684SRob Clark } 394c8afe684SRob Clark 3954b85f7f5SRob Clark ret = msm_gem_map_vma(aspace, vma, msm_obj->sgt, 3964b85f7f5SRob Clark obj->size >> PAGE_SHIFT); 3974b85f7f5SRob Clark if (ret) 3984b85f7f5SRob Clark goto fail; 3994b85f7f5SRob Clark } 4004b85f7f5SRob Clark 4014b85f7f5SRob Clark *iova = vma->iova; 4020e08270aSSushmita Susheelendra 4030e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 4044b85f7f5SRob Clark return 0; 4054b85f7f5SRob Clark 4064b85f7f5SRob Clark fail: 4074b85f7f5SRob Clark del_vma(vma); 408c8afe684SRob Clark 4090e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 410c8afe684SRob Clark return ret; 411c8afe684SRob Clark } 412c8afe684SRob Clark 4132638d90aSRob Clark /* get iova without taking a reference, used in places where you have 4142638d90aSRob Clark * already done a 'msm_gem_get_iova()'. 4152638d90aSRob Clark */ 4168bdcd949SRob Clark uint64_t msm_gem_iova(struct drm_gem_object *obj, 4178bdcd949SRob Clark struct msm_gem_address_space *aspace) 4182638d90aSRob Clark { 4190e08270aSSushmita Susheelendra struct msm_gem_object *msm_obj = to_msm_bo(obj); 4204b85f7f5SRob Clark struct msm_gem_vma *vma; 4214b85f7f5SRob Clark 4220e08270aSSushmita Susheelendra mutex_lock(&msm_obj->lock); 4234b85f7f5SRob Clark vma = lookup_vma(obj, aspace); 4240e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 4254b85f7f5SRob Clark WARN_ON(!vma); 4264b85f7f5SRob Clark 4274b85f7f5SRob Clark return vma ? vma->iova : 0; 4282638d90aSRob Clark } 4292638d90aSRob Clark 4308bdcd949SRob Clark void msm_gem_put_iova(struct drm_gem_object *obj, 4318bdcd949SRob Clark struct msm_gem_address_space *aspace) 432c8afe684SRob Clark { 433c8afe684SRob Clark // XXX TODO .. 434c8afe684SRob Clark // NOTE: probably don't need a _locked() version.. we wouldn't 435c8afe684SRob Clark // normally unmap here, but instead just mark that it could be 436c8afe684SRob Clark // unmapped (if the iova refcnt drops to zero), but then later 437c8afe684SRob Clark // if another _get_iova_locked() fails we can start unmapping 438c8afe684SRob Clark // things that are no longer needed.. 439c8afe684SRob Clark } 440c8afe684SRob Clark 441c8afe684SRob Clark int msm_gem_dumb_create(struct drm_file *file, struct drm_device *dev, 442c8afe684SRob Clark struct drm_mode_create_dumb *args) 443c8afe684SRob Clark { 444c8afe684SRob Clark args->pitch = align_pitch(args->width, args->bpp); 445c8afe684SRob Clark args->size = PAGE_ALIGN(args->pitch * args->height); 446c8afe684SRob Clark return msm_gem_new_handle(dev, file, args->size, 447c8afe684SRob Clark MSM_BO_SCANOUT | MSM_BO_WC, &args->handle); 448c8afe684SRob Clark } 449c8afe684SRob Clark 450c8afe684SRob Clark int msm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev, 451c8afe684SRob Clark uint32_t handle, uint64_t *offset) 452c8afe684SRob Clark { 453c8afe684SRob Clark struct drm_gem_object *obj; 454c8afe684SRob Clark int ret = 0; 455c8afe684SRob Clark 456c8afe684SRob Clark /* GEM does all our handle to object mapping */ 457a8ad0bd8SChris Wilson obj = drm_gem_object_lookup(file, handle); 458c8afe684SRob Clark if (obj == NULL) { 459c8afe684SRob Clark ret = -ENOENT; 460c8afe684SRob Clark goto fail; 461c8afe684SRob Clark } 462c8afe684SRob Clark 463c8afe684SRob Clark *offset = msm_gem_mmap_offset(obj); 464c8afe684SRob Clark 465c8afe684SRob Clark drm_gem_object_unreference_unlocked(obj); 466c8afe684SRob Clark 467c8afe684SRob Clark fail: 468c8afe684SRob Clark return ret; 469c8afe684SRob Clark } 470c8afe684SRob Clark 47118f23049SRob Clark void *msm_gem_get_vaddr(struct drm_gem_object *obj) 472c8afe684SRob Clark { 4730e08270aSSushmita Susheelendra struct msm_gem_object *msm_obj = to_msm_bo(obj); 4740e08270aSSushmita Susheelendra int ret = 0; 4750e08270aSSushmita Susheelendra 4760e08270aSSushmita Susheelendra mutex_lock(&msm_obj->lock); 4770e08270aSSushmita Susheelendra 4780e08270aSSushmita Susheelendra if (WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) { 4790e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 4800e08270aSSushmita Susheelendra return ERR_PTR(-EBUSY); 481c8afe684SRob Clark } 482c8afe684SRob Clark 4830e08270aSSushmita Susheelendra /* increment vmap_count *before* vmap() call, so shrinker can 4840e08270aSSushmita Susheelendra * check vmap_count (is_vunmapable()) outside of msm_obj->lock. 4850e08270aSSushmita Susheelendra * This guarantees that we won't try to msm_gem_vunmap() this 4860e08270aSSushmita Susheelendra * same object from within the vmap() call (while we already 4870e08270aSSushmita Susheelendra * hold msm_obj->lock) 4880e08270aSSushmita Susheelendra */ 4890e08270aSSushmita Susheelendra msm_obj->vmap_count++; 4900e08270aSSushmita Susheelendra 4910e08270aSSushmita Susheelendra if (!msm_obj->vaddr) { 4920e08270aSSushmita Susheelendra struct page **pages = get_pages(obj); 4930e08270aSSushmita Susheelendra if (IS_ERR(pages)) { 4940e08270aSSushmita Susheelendra ret = PTR_ERR(pages); 4950e08270aSSushmita Susheelendra goto fail; 4960e08270aSSushmita Susheelendra } 4970e08270aSSushmita Susheelendra msm_obj->vaddr = vmap(pages, obj->size >> PAGE_SHIFT, 4980e08270aSSushmita Susheelendra VM_MAP, pgprot_writecombine(PAGE_KERNEL)); 4990e08270aSSushmita Susheelendra if (msm_obj->vaddr == NULL) { 5000e08270aSSushmita Susheelendra ret = -ENOMEM; 5010e08270aSSushmita Susheelendra goto fail; 5020e08270aSSushmita Susheelendra } 5030e08270aSSushmita Susheelendra } 5040e08270aSSushmita Susheelendra 5050e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 5060e08270aSSushmita Susheelendra return msm_obj->vaddr; 5070e08270aSSushmita Susheelendra 5080e08270aSSushmita Susheelendra fail: 509e1e9db2cSRob Clark msm_obj->vmap_count--; 5100e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 5110e08270aSSushmita Susheelendra return ERR_PTR(ret); 51218f23049SRob Clark } 51318f23049SRob Clark 51418f23049SRob Clark void msm_gem_put_vaddr(struct drm_gem_object *obj) 51518f23049SRob Clark { 5160e08270aSSushmita Susheelendra struct msm_gem_object *msm_obj = to_msm_bo(obj); 5170e08270aSSushmita Susheelendra 5180e08270aSSushmita Susheelendra mutex_lock(&msm_obj->lock); 5190e08270aSSushmita Susheelendra WARN_ON(msm_obj->vmap_count < 1); 5200e08270aSSushmita Susheelendra msm_obj->vmap_count--; 5210e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 52218f23049SRob Clark } 52318f23049SRob Clark 5244cd33c48SRob Clark /* Update madvise status, returns true if not purged, else 5254cd33c48SRob Clark * false or -errno. 5264cd33c48SRob Clark */ 5274cd33c48SRob Clark int msm_gem_madvise(struct drm_gem_object *obj, unsigned madv) 5284cd33c48SRob Clark { 5294cd33c48SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 5304cd33c48SRob Clark 5310e08270aSSushmita Susheelendra mutex_lock(&msm_obj->lock); 5320e08270aSSushmita Susheelendra 5334cd33c48SRob Clark WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); 5344cd33c48SRob Clark 5354cd33c48SRob Clark if (msm_obj->madv != __MSM_MADV_PURGED) 5364cd33c48SRob Clark msm_obj->madv = madv; 5374cd33c48SRob Clark 5380e08270aSSushmita Susheelendra madv = msm_obj->madv; 5390e08270aSSushmita Susheelendra 5400e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 5410e08270aSSushmita Susheelendra 5420e08270aSSushmita Susheelendra return (madv != __MSM_MADV_PURGED); 5434cd33c48SRob Clark } 5444cd33c48SRob Clark 5450e08270aSSushmita Susheelendra void msm_gem_purge(struct drm_gem_object *obj, enum msm_gem_lock subclass) 54668209390SRob Clark { 54768209390SRob Clark struct drm_device *dev = obj->dev; 54868209390SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 54968209390SRob Clark 55068209390SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 55168209390SRob Clark WARN_ON(!is_purgeable(msm_obj)); 55268209390SRob Clark WARN_ON(obj->import_attach); 55368209390SRob Clark 5540e08270aSSushmita Susheelendra mutex_lock_nested(&msm_obj->lock, subclass); 5550e08270aSSushmita Susheelendra 55668209390SRob Clark put_iova(obj); 55768209390SRob Clark 5580e08270aSSushmita Susheelendra msm_gem_vunmap_locked(obj); 55968209390SRob Clark 56068209390SRob Clark put_pages(obj); 56168209390SRob Clark 56268209390SRob Clark msm_obj->madv = __MSM_MADV_PURGED; 56368209390SRob Clark 56468209390SRob Clark drm_vma_node_unmap(&obj->vma_node, dev->anon_inode->i_mapping); 56568209390SRob Clark drm_gem_free_mmap_offset(obj); 56668209390SRob Clark 56768209390SRob Clark /* Our goal here is to return as much of the memory as 56868209390SRob Clark * is possible back to the system as we are called from OOM. 56968209390SRob Clark * To do this we must instruct the shmfs to drop all of its 57068209390SRob Clark * backing pages, *now*. 57168209390SRob Clark */ 57268209390SRob Clark shmem_truncate_range(file_inode(obj->filp), 0, (loff_t)-1); 57368209390SRob Clark 57468209390SRob Clark invalidate_mapping_pages(file_inode(obj->filp)->i_mapping, 57568209390SRob Clark 0, (loff_t)-1); 5760e08270aSSushmita Susheelendra 5770e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 57868209390SRob Clark } 57968209390SRob Clark 5800e08270aSSushmita Susheelendra static void msm_gem_vunmap_locked(struct drm_gem_object *obj) 581e1e9db2cSRob Clark { 582e1e9db2cSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 583e1e9db2cSRob Clark 5840e08270aSSushmita Susheelendra WARN_ON(!mutex_is_locked(&msm_obj->lock)); 5850e08270aSSushmita Susheelendra 586e1e9db2cSRob Clark if (!msm_obj->vaddr || WARN_ON(!is_vunmapable(msm_obj))) 587e1e9db2cSRob Clark return; 588e1e9db2cSRob Clark 589e1e9db2cSRob Clark vunmap(msm_obj->vaddr); 590e1e9db2cSRob Clark msm_obj->vaddr = NULL; 591e1e9db2cSRob Clark } 592e1e9db2cSRob Clark 5930e08270aSSushmita Susheelendra void msm_gem_vunmap(struct drm_gem_object *obj, enum msm_gem_lock subclass) 5940e08270aSSushmita Susheelendra { 5950e08270aSSushmita Susheelendra struct msm_gem_object *msm_obj = to_msm_bo(obj); 5960e08270aSSushmita Susheelendra 5970e08270aSSushmita Susheelendra mutex_lock_nested(&msm_obj->lock, subclass); 5980e08270aSSushmita Susheelendra msm_gem_vunmap_locked(obj); 5990e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 6000e08270aSSushmita Susheelendra } 6010e08270aSSushmita Susheelendra 602b6295f9aSRob Clark /* must be called before _move_to_active().. */ 603b6295f9aSRob Clark int msm_gem_sync_object(struct drm_gem_object *obj, 604b6295f9aSRob Clark struct msm_fence_context *fctx, bool exclusive) 605b6295f9aSRob Clark { 606b6295f9aSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 607b6295f9aSRob Clark struct reservation_object_list *fobj; 608f54d1867SChris Wilson struct dma_fence *fence; 609b6295f9aSRob Clark int i, ret; 610b6295f9aSRob Clark 611b6295f9aSRob Clark if (!exclusive) { 612b6295f9aSRob Clark /* NOTE: _reserve_shared() must happen before _add_shared_fence(), 613b6295f9aSRob Clark * which makes this a slightly strange place to call it. OTOH this 614b6295f9aSRob Clark * is a convenient can-fail point to hook it in. (And similar to 615b6295f9aSRob Clark * how etnaviv and nouveau handle this.) 616b6295f9aSRob Clark */ 617b6295f9aSRob Clark ret = reservation_object_reserve_shared(msm_obj->resv); 618b6295f9aSRob Clark if (ret) 619b6295f9aSRob Clark return ret; 620b6295f9aSRob Clark } 621b6295f9aSRob Clark 622b6295f9aSRob Clark fobj = reservation_object_get_list(msm_obj->resv); 623b6295f9aSRob Clark if (!fobj || (fobj->shared_count == 0)) { 624b6295f9aSRob Clark fence = reservation_object_get_excl(msm_obj->resv); 625b6295f9aSRob Clark /* don't need to wait on our own fences, since ring is fifo */ 626b6295f9aSRob Clark if (fence && (fence->context != fctx->context)) { 627f54d1867SChris Wilson ret = dma_fence_wait(fence, true); 628b6295f9aSRob Clark if (ret) 629b6295f9aSRob Clark return ret; 630b6295f9aSRob Clark } 631b6295f9aSRob Clark } 632b6295f9aSRob Clark 633b6295f9aSRob Clark if (!exclusive || !fobj) 634b6295f9aSRob Clark return 0; 635b6295f9aSRob Clark 636b6295f9aSRob Clark for (i = 0; i < fobj->shared_count; i++) { 637b6295f9aSRob Clark fence = rcu_dereference_protected(fobj->shared[i], 638b6295f9aSRob Clark reservation_object_held(msm_obj->resv)); 639b6295f9aSRob Clark if (fence->context != fctx->context) { 640f54d1867SChris Wilson ret = dma_fence_wait(fence, true); 641b6295f9aSRob Clark if (ret) 642b6295f9aSRob Clark return ret; 643b6295f9aSRob Clark } 644b6295f9aSRob Clark } 645b6295f9aSRob Clark 646b6295f9aSRob Clark return 0; 647b6295f9aSRob Clark } 648b6295f9aSRob Clark 6497198e6b0SRob Clark void msm_gem_move_to_active(struct drm_gem_object *obj, 650f54d1867SChris Wilson struct msm_gpu *gpu, bool exclusive, struct dma_fence *fence) 6517198e6b0SRob Clark { 6527198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 6534cd33c48SRob Clark WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED); 6547198e6b0SRob Clark msm_obj->gpu = gpu; 655b6295f9aSRob Clark if (exclusive) 656b6295f9aSRob Clark reservation_object_add_excl_fence(msm_obj->resv, fence); 657bf6811f3SRob Clark else 658b6295f9aSRob Clark reservation_object_add_shared_fence(msm_obj->resv, fence); 6597198e6b0SRob Clark list_del_init(&msm_obj->mm_list); 6607198e6b0SRob Clark list_add_tail(&msm_obj->mm_list, &gpu->active_list); 6617198e6b0SRob Clark } 6627198e6b0SRob Clark 6637198e6b0SRob Clark void msm_gem_move_to_inactive(struct drm_gem_object *obj) 6647198e6b0SRob Clark { 6657198e6b0SRob Clark struct drm_device *dev = obj->dev; 6667198e6b0SRob Clark struct msm_drm_private *priv = dev->dev_private; 6677198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 6687198e6b0SRob Clark 6697198e6b0SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 6707198e6b0SRob Clark 6717198e6b0SRob Clark msm_obj->gpu = NULL; 6727198e6b0SRob Clark list_del_init(&msm_obj->mm_list); 6737198e6b0SRob Clark list_add_tail(&msm_obj->mm_list, &priv->inactive_list); 6747198e6b0SRob Clark } 6757198e6b0SRob Clark 676ba00c3f2SRob Clark int msm_gem_cpu_prep(struct drm_gem_object *obj, uint32_t op, ktime_t *timeout) 677ba00c3f2SRob Clark { 678b6295f9aSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 679b6295f9aSRob Clark bool write = !!(op & MSM_PREP_WRITE); 680f755e227SChris Wilson unsigned long remain = 681f755e227SChris Wilson op & MSM_PREP_NOSYNC ? 0 : timeout_to_jiffies(timeout); 682f755e227SChris Wilson long ret; 683b6295f9aSRob Clark 684b6295f9aSRob Clark ret = reservation_object_wait_timeout_rcu(msm_obj->resv, write, 685f755e227SChris Wilson true, remain); 686f755e227SChris Wilson if (ret == 0) 687f755e227SChris Wilson return remain == 0 ? -EBUSY : -ETIMEDOUT; 688f755e227SChris Wilson else if (ret < 0) 689f755e227SChris Wilson return ret; 690ba00c3f2SRob Clark 6917198e6b0SRob Clark /* TODO cache maintenance */ 6927198e6b0SRob Clark 693b6295f9aSRob Clark return 0; 6947198e6b0SRob Clark } 6957198e6b0SRob Clark 6967198e6b0SRob Clark int msm_gem_cpu_fini(struct drm_gem_object *obj) 6977198e6b0SRob Clark { 6987198e6b0SRob Clark /* TODO cache maintenance */ 699c8afe684SRob Clark return 0; 700c8afe684SRob Clark } 701c8afe684SRob Clark 702c8afe684SRob Clark #ifdef CONFIG_DEBUG_FS 703f54d1867SChris Wilson static void describe_fence(struct dma_fence *fence, const char *type, 704b6295f9aSRob Clark struct seq_file *m) 705b6295f9aSRob Clark { 706f54d1867SChris Wilson if (!dma_fence_is_signaled(fence)) 707b6295f9aSRob Clark seq_printf(m, "\t%9s: %s %s seq %u\n", type, 708b6295f9aSRob Clark fence->ops->get_driver_name(fence), 709b6295f9aSRob Clark fence->ops->get_timeline_name(fence), 710b6295f9aSRob Clark fence->seqno); 711b6295f9aSRob Clark } 712b6295f9aSRob Clark 713c8afe684SRob Clark void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m) 714c8afe684SRob Clark { 715c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 716b6295f9aSRob Clark struct reservation_object *robj = msm_obj->resv; 717b6295f9aSRob Clark struct reservation_object_list *fobj; 718f54d1867SChris Wilson struct dma_fence *fence; 7194b85f7f5SRob Clark struct msm_gem_vma *vma; 720c8afe684SRob Clark uint64_t off = drm_vma_node_start(&obj->vma_node); 7214cd33c48SRob Clark const char *madv; 722c8afe684SRob Clark 7230e08270aSSushmita Susheelendra mutex_lock(&msm_obj->lock); 724b6295f9aSRob Clark 7254cd33c48SRob Clark switch (msm_obj->madv) { 7264cd33c48SRob Clark case __MSM_MADV_PURGED: 7274cd33c48SRob Clark madv = " purged"; 7284cd33c48SRob Clark break; 7294cd33c48SRob Clark case MSM_MADV_DONTNEED: 7304cd33c48SRob Clark madv = " purgeable"; 7314cd33c48SRob Clark break; 7324cd33c48SRob Clark case MSM_MADV_WILLNEED: 7334cd33c48SRob Clark default: 7344cd33c48SRob Clark madv = ""; 7354cd33c48SRob Clark break; 7364cd33c48SRob Clark } 7374cd33c48SRob Clark 738667ce33eSRob Clark seq_printf(m, "%08x: %c %2d (%2d) %08llx %p\t", 7397198e6b0SRob Clark msm_obj->flags, is_active(msm_obj) ? 'A' : 'I', 7402c935bc5SPeter Zijlstra obj->name, kref_read(&obj->refcount), 741667ce33eSRob Clark off, msm_obj->vaddr); 742667ce33eSRob Clark 7434b85f7f5SRob Clark /* FIXME: we need to print the address space here too */ 7444b85f7f5SRob Clark list_for_each_entry(vma, &msm_obj->vmas, list) 7454b85f7f5SRob Clark seq_printf(m, " %08llx", vma->iova); 746667ce33eSRob Clark 747667ce33eSRob Clark seq_printf(m, " %zu%s\n", obj->size, madv); 748b6295f9aSRob Clark 749b6295f9aSRob Clark rcu_read_lock(); 750b6295f9aSRob Clark fobj = rcu_dereference(robj->fence); 751b6295f9aSRob Clark if (fobj) { 752b6295f9aSRob Clark unsigned int i, shared_count = fobj->shared_count; 753b6295f9aSRob Clark 754b6295f9aSRob Clark for (i = 0; i < shared_count; i++) { 755b6295f9aSRob Clark fence = rcu_dereference(fobj->shared[i]); 756b6295f9aSRob Clark describe_fence(fence, "Shared", m); 757b6295f9aSRob Clark } 758b6295f9aSRob Clark } 759b6295f9aSRob Clark 760b6295f9aSRob Clark fence = rcu_dereference(robj->fence_excl); 761b6295f9aSRob Clark if (fence) 762b6295f9aSRob Clark describe_fence(fence, "Exclusive", m); 763b6295f9aSRob Clark rcu_read_unlock(); 7640e08270aSSushmita Susheelendra 7650e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 766c8afe684SRob Clark } 767c8afe684SRob Clark 768c8afe684SRob Clark void msm_gem_describe_objects(struct list_head *list, struct seq_file *m) 769c8afe684SRob Clark { 770c8afe684SRob Clark struct msm_gem_object *msm_obj; 771c8afe684SRob Clark int count = 0; 772c8afe684SRob Clark size_t size = 0; 773c8afe684SRob Clark 774c8afe684SRob Clark list_for_each_entry(msm_obj, list, mm_list) { 775c8afe684SRob Clark struct drm_gem_object *obj = &msm_obj->base; 776c8afe684SRob Clark seq_printf(m, " "); 777c8afe684SRob Clark msm_gem_describe(obj, m); 778c8afe684SRob Clark count++; 779c8afe684SRob Clark size += obj->size; 780c8afe684SRob Clark } 781c8afe684SRob Clark 782c8afe684SRob Clark seq_printf(m, "Total %d objects, %zu bytes\n", count, size); 783c8afe684SRob Clark } 784c8afe684SRob Clark #endif 785c8afe684SRob Clark 786c8afe684SRob Clark void msm_gem_free_object(struct drm_gem_object *obj) 787c8afe684SRob Clark { 788c8afe684SRob Clark struct drm_device *dev = obj->dev; 789c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 790c8afe684SRob Clark 791c8afe684SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 792c8afe684SRob Clark 7937198e6b0SRob Clark /* object should not be on active list: */ 7947198e6b0SRob Clark WARN_ON(is_active(msm_obj)); 7957198e6b0SRob Clark 796c8afe684SRob Clark list_del(&msm_obj->mm_list); 797c8afe684SRob Clark 7980e08270aSSushmita Susheelendra mutex_lock(&msm_obj->lock); 7990e08270aSSushmita Susheelendra 8004fe5f65eSRob Clark put_iova(obj); 801c8afe684SRob Clark 80205b84911SRob Clark if (obj->import_attach) { 80305b84911SRob Clark if (msm_obj->vaddr) 80405b84911SRob Clark dma_buf_vunmap(obj->import_attach->dmabuf, msm_obj->vaddr); 80505b84911SRob Clark 80605b84911SRob Clark /* Don't drop the pages for imported dmabuf, as they are not 80705b84911SRob Clark * ours, just free the array we allocated: 80805b84911SRob Clark */ 80905b84911SRob Clark if (msm_obj->pages) 8102098105eSMichal Hocko kvfree(msm_obj->pages); 81105b84911SRob Clark 812f28730c8Sjilai wang drm_prime_gem_destroy(obj, msm_obj->sgt); 81305b84911SRob Clark } else { 8140e08270aSSushmita Susheelendra msm_gem_vunmap_locked(obj); 815c8afe684SRob Clark put_pages(obj); 81605b84911SRob Clark } 817c8afe684SRob Clark 8187198e6b0SRob Clark if (msm_obj->resv == &msm_obj->_resv) 8197198e6b0SRob Clark reservation_object_fini(msm_obj->resv); 8207198e6b0SRob Clark 821c8afe684SRob Clark drm_gem_object_release(obj); 822c8afe684SRob Clark 8230e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 824c8afe684SRob Clark kfree(msm_obj); 825c8afe684SRob Clark } 826c8afe684SRob Clark 827c8afe684SRob Clark /* convenience method to construct a GEM buffer object, and userspace handle */ 828c8afe684SRob Clark int msm_gem_new_handle(struct drm_device *dev, struct drm_file *file, 829c8afe684SRob Clark uint32_t size, uint32_t flags, uint32_t *handle) 830c8afe684SRob Clark { 831c8afe684SRob Clark struct drm_gem_object *obj; 832c8afe684SRob Clark int ret; 833c8afe684SRob Clark 834c8afe684SRob Clark obj = msm_gem_new(dev, size, flags); 835c8afe684SRob Clark 836c8afe684SRob Clark if (IS_ERR(obj)) 837c8afe684SRob Clark return PTR_ERR(obj); 838c8afe684SRob Clark 839c8afe684SRob Clark ret = drm_gem_handle_create(file, obj, handle); 840c8afe684SRob Clark 841c8afe684SRob Clark /* drop reference from allocate - handle holds it now */ 842c8afe684SRob Clark drm_gem_object_unreference_unlocked(obj); 843c8afe684SRob Clark 844c8afe684SRob Clark return ret; 845c8afe684SRob Clark } 846c8afe684SRob Clark 84705b84911SRob Clark static int msm_gem_new_impl(struct drm_device *dev, 84805b84911SRob Clark uint32_t size, uint32_t flags, 84979f0e202SRob Clark struct reservation_object *resv, 8500e08270aSSushmita Susheelendra struct drm_gem_object **obj, 8510e08270aSSushmita Susheelendra bool struct_mutex_locked) 852c8afe684SRob Clark { 853c8afe684SRob Clark struct msm_drm_private *priv = dev->dev_private; 854c8afe684SRob Clark struct msm_gem_object *msm_obj; 855c8afe684SRob Clark 856c8afe684SRob Clark switch (flags & MSM_BO_CACHE_MASK) { 857c8afe684SRob Clark case MSM_BO_UNCACHED: 858c8afe684SRob Clark case MSM_BO_CACHED: 859c8afe684SRob Clark case MSM_BO_WC: 860c8afe684SRob Clark break; 861c8afe684SRob Clark default: 862c8afe684SRob Clark dev_err(dev->dev, "invalid cache flag: %x\n", 863c8afe684SRob Clark (flags & MSM_BO_CACHE_MASK)); 86405b84911SRob Clark return -EINVAL; 865c8afe684SRob Clark } 866c8afe684SRob Clark 867667ce33eSRob Clark msm_obj = kzalloc(sizeof(*msm_obj), GFP_KERNEL); 86805b84911SRob Clark if (!msm_obj) 86905b84911SRob Clark return -ENOMEM; 870c8afe684SRob Clark 8710e08270aSSushmita Susheelendra mutex_init(&msm_obj->lock); 8720e08270aSSushmita Susheelendra 873c8afe684SRob Clark msm_obj->flags = flags; 8744cd33c48SRob Clark msm_obj->madv = MSM_MADV_WILLNEED; 875c8afe684SRob Clark 87679f0e202SRob Clark if (resv) { 87779f0e202SRob Clark msm_obj->resv = resv; 87879f0e202SRob Clark } else { 8797198e6b0SRob Clark msm_obj->resv = &msm_obj->_resv; 8807198e6b0SRob Clark reservation_object_init(msm_obj->resv); 88179f0e202SRob Clark } 882c8afe684SRob Clark 8837198e6b0SRob Clark INIT_LIST_HEAD(&msm_obj->submit_entry); 8844b85f7f5SRob Clark INIT_LIST_HEAD(&msm_obj->vmas); 8854b85f7f5SRob Clark 8860e08270aSSushmita Susheelendra if (struct_mutex_locked) { 8870e08270aSSushmita Susheelendra WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 888c8afe684SRob Clark list_add_tail(&msm_obj->mm_list, &priv->inactive_list); 8890e08270aSSushmita Susheelendra } else { 8900e08270aSSushmita Susheelendra mutex_lock(&dev->struct_mutex); 8910e08270aSSushmita Susheelendra list_add_tail(&msm_obj->mm_list, &priv->inactive_list); 8920e08270aSSushmita Susheelendra mutex_unlock(&dev->struct_mutex); 8930e08270aSSushmita Susheelendra } 894c8afe684SRob Clark 89505b84911SRob Clark *obj = &msm_obj->base; 89605b84911SRob Clark 89705b84911SRob Clark return 0; 89805b84911SRob Clark } 89905b84911SRob Clark 9000e08270aSSushmita Susheelendra static struct drm_gem_object *_msm_gem_new(struct drm_device *dev, 9010e08270aSSushmita Susheelendra uint32_t size, uint32_t flags, bool struct_mutex_locked) 90205b84911SRob Clark { 903f4839bd5SRob Clark struct msm_drm_private *priv = dev->dev_private; 904871d812aSRob Clark struct drm_gem_object *obj = NULL; 905f4839bd5SRob Clark bool use_vram = false; 90605b84911SRob Clark int ret; 90705b84911SRob Clark 90805b84911SRob Clark size = PAGE_ALIGN(size); 90905b84911SRob Clark 910f4839bd5SRob Clark if (!iommu_present(&platform_bus_type)) 911f4839bd5SRob Clark use_vram = true; 912f4839bd5SRob Clark else if ((flags & MSM_BO_STOLEN) && priv->vram.size) 913f4839bd5SRob Clark use_vram = true; 914f4839bd5SRob Clark 915f4839bd5SRob Clark if (WARN_ON(use_vram && !priv->vram.size)) 916f4839bd5SRob Clark return ERR_PTR(-EINVAL); 917f4839bd5SRob Clark 9181a5dff5dSJordan Crouse /* Disallow zero sized objects as they make the underlying 9191a5dff5dSJordan Crouse * infrastructure grumpy 9201a5dff5dSJordan Crouse */ 9211a5dff5dSJordan Crouse if (size == 0) 9221a5dff5dSJordan Crouse return ERR_PTR(-EINVAL); 9231a5dff5dSJordan Crouse 9240e08270aSSushmita Susheelendra ret = msm_gem_new_impl(dev, size, flags, NULL, &obj, struct_mutex_locked); 92505b84911SRob Clark if (ret) 92605b84911SRob Clark goto fail; 92705b84911SRob Clark 928f4839bd5SRob Clark if (use_vram) { 9294b85f7f5SRob Clark struct msm_gem_vma *vma; 930f4839bd5SRob Clark struct page **pages; 931f4839bd5SRob Clark 9324b85f7f5SRob Clark vma = add_vma(obj, NULL); 9334b85f7f5SRob Clark if (IS_ERR(vma)) { 9344b85f7f5SRob Clark ret = PTR_ERR(vma); 9354b85f7f5SRob Clark goto fail; 9364b85f7f5SRob Clark } 9374b85f7f5SRob Clark 9384b85f7f5SRob Clark to_msm_bo(obj)->vram_node = &vma->node; 9394b85f7f5SRob Clark 940f4839bd5SRob Clark drm_gem_private_object_init(dev, obj, size); 941f4839bd5SRob Clark 942f4839bd5SRob Clark pages = get_pages(obj); 943f4839bd5SRob Clark if (IS_ERR(pages)) { 944f4839bd5SRob Clark ret = PTR_ERR(pages); 945f4839bd5SRob Clark goto fail; 946f4839bd5SRob Clark } 9474b85f7f5SRob Clark 9484b85f7f5SRob Clark vma->iova = physaddr(obj); 949f4839bd5SRob Clark } else { 95005b84911SRob Clark ret = drm_gem_object_init(dev, obj, size); 95105b84911SRob Clark if (ret) 95205b84911SRob Clark goto fail; 953871d812aSRob Clark } 95405b84911SRob Clark 95505b84911SRob Clark return obj; 95605b84911SRob Clark 95705b84911SRob Clark fail: 9580e08270aSSushmita Susheelendra drm_gem_object_unreference_unlocked(obj); 95905b84911SRob Clark return ERR_PTR(ret); 96005b84911SRob Clark } 96105b84911SRob Clark 9620e08270aSSushmita Susheelendra struct drm_gem_object *msm_gem_new_locked(struct drm_device *dev, 9630e08270aSSushmita Susheelendra uint32_t size, uint32_t flags) 9640e08270aSSushmita Susheelendra { 9650e08270aSSushmita Susheelendra return _msm_gem_new(dev, size, flags, true); 9660e08270aSSushmita Susheelendra } 9670e08270aSSushmita Susheelendra 9680e08270aSSushmita Susheelendra struct drm_gem_object *msm_gem_new(struct drm_device *dev, 9690e08270aSSushmita Susheelendra uint32_t size, uint32_t flags) 9700e08270aSSushmita Susheelendra { 9710e08270aSSushmita Susheelendra return _msm_gem_new(dev, size, flags, false); 9720e08270aSSushmita Susheelendra } 9730e08270aSSushmita Susheelendra 97405b84911SRob Clark struct drm_gem_object *msm_gem_import(struct drm_device *dev, 97579f0e202SRob Clark struct dma_buf *dmabuf, struct sg_table *sgt) 97605b84911SRob Clark { 97705b84911SRob Clark struct msm_gem_object *msm_obj; 97805b84911SRob Clark struct drm_gem_object *obj; 97979f0e202SRob Clark uint32_t size; 98005b84911SRob Clark int ret, npages; 98105b84911SRob Clark 982871d812aSRob Clark /* if we don't have IOMMU, don't bother pretending we can import: */ 983871d812aSRob Clark if (!iommu_present(&platform_bus_type)) { 984871d812aSRob Clark dev_err(dev->dev, "cannot import without IOMMU\n"); 985871d812aSRob Clark return ERR_PTR(-EINVAL); 986871d812aSRob Clark } 987871d812aSRob Clark 98879f0e202SRob Clark size = PAGE_ALIGN(dmabuf->size); 98905b84911SRob Clark 9900e08270aSSushmita Susheelendra ret = msm_gem_new_impl(dev, size, MSM_BO_WC, dmabuf->resv, &obj, false); 99105b84911SRob Clark if (ret) 99205b84911SRob Clark goto fail; 99305b84911SRob Clark 99405b84911SRob Clark drm_gem_private_object_init(dev, obj, size); 99505b84911SRob Clark 99605b84911SRob Clark npages = size / PAGE_SIZE; 99705b84911SRob Clark 99805b84911SRob Clark msm_obj = to_msm_bo(obj); 9990e08270aSSushmita Susheelendra mutex_lock(&msm_obj->lock); 100005b84911SRob Clark msm_obj->sgt = sgt; 10012098105eSMichal Hocko msm_obj->pages = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL); 100205b84911SRob Clark if (!msm_obj->pages) { 10030e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 100405b84911SRob Clark ret = -ENOMEM; 100505b84911SRob Clark goto fail; 100605b84911SRob Clark } 100705b84911SRob Clark 100805b84911SRob Clark ret = drm_prime_sg_to_page_addr_arrays(sgt, msm_obj->pages, NULL, npages); 10090e08270aSSushmita Susheelendra if (ret) { 10100e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 101105b84911SRob Clark goto fail; 10120e08270aSSushmita Susheelendra } 101305b84911SRob Clark 10140e08270aSSushmita Susheelendra mutex_unlock(&msm_obj->lock); 1015c8afe684SRob Clark return obj; 1016c8afe684SRob Clark 1017c8afe684SRob Clark fail: 1018c8afe684SRob Clark drm_gem_object_unreference_unlocked(obj); 1019c8afe684SRob Clark return ERR_PTR(ret); 1020c8afe684SRob Clark } 1021