![Rob Clark](/assets/img/avatar_default.png)
This should be using drm_gem_object_put(). Also since this is done only in driver unload path, we don't need to synchronize setting tx_gem_obj to NULL, so juse use the _unlocked() variant. Signed-off-by: Rob Clark <robdclark@gmail.com>
1087 lines
25 KiB
C
1087 lines
25 KiB
C
/*
|
|
* Copyright (C) 2013 Red Hat
|
|
* Author: Rob Clark <robdclark@gmail.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 as published by
|
|
* the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along with
|
|
* this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <linux/spinlock.h>
|
|
#include <linux/shmem_fs.h>
|
|
#include <linux/dma-buf.h>
|
|
#include <linux/pfn_t.h>
|
|
|
|
#include "msm_drv.h"
|
|
#include "msm_fence.h"
|
|
#include "msm_gem.h"
|
|
#include "msm_gpu.h"
|
|
#include "msm_mmu.h"
|
|
|
|
static void msm_gem_vunmap_locked(struct drm_gem_object *obj);
|
|
|
|
|
|
static dma_addr_t physaddr(struct drm_gem_object *obj)
|
|
{
|
|
struct msm_gem_object *msm_obj = to_msm_bo(obj);
|
|
struct msm_drm_private *priv = obj->dev->dev_private;
|
|
return (((dma_addr_t)msm_obj->vram_node->start) << PAGE_SHIFT) +
|
|
priv->vram.paddr;
|
|
}
|
|
|
|
static bool use_pages(struct drm_gem_object *obj)
|
|
{
|
|
struct msm_gem_object *msm_obj = to_msm_bo(obj);
|
|
return !msm_obj->vram_node;
|
|
}
|
|
|
|
/* allocate pages from VRAM carveout, used when no IOMMU: */
|
|
static struct page **get_pages_vram(struct drm_gem_object *obj, int npages)
|
|
{
|
|
struct msm_gem_object *msm_obj = to_msm_bo(obj);
|
|
struct msm_drm_private *priv = obj->dev->dev_private;
|
|
dma_addr_t paddr;
|
|
struct page **p;
|
|
int ret, i;
|
|
|
|
p = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
|
|
if (!p)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
spin_lock(&priv->vram.lock);
|
|
ret = drm_mm_insert_node(&priv->vram.mm, msm_obj->vram_node, npages);
|
|
spin_unlock(&priv->vram.lock);
|
|
if (ret) {
|
|
kvfree(p);
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
paddr = physaddr(obj);
|
|
for (i = 0; i < npages; i++) {
|
|
p[i] = phys_to_page(paddr);
|
|
paddr += PAGE_SIZE;
|
|
}
|
|
|
|
return p;
|
|
}
|
|
|
|
static struct page **get_pages(struct drm_gem_object *obj)
|
|
{
|
|
struct msm_gem_object *msm_obj = to_msm_bo(obj);
|
|
|
|
if (!msm_obj->pages) {
|
|
struct drm_device *dev = obj->dev;
|
|
struct page **p;
|
|
int npages = obj->size >> PAGE_SHIFT;
|
|
|
|
if (use_pages(obj))
|
|
p = drm_gem_get_pages(obj);
|
|
else
|
|
p = get_pages_vram(obj, npages);
|
|
|
|
if (IS_ERR(p)) {
|
|
dev_err(dev->dev, "could not get pages: %ld\n",
|
|
PTR_ERR(p));
|
|
return p;
|
|
}
|
|
|
|
msm_obj->pages = p;
|
|
|
|
msm_obj->sgt = drm_prime_pages_to_sg(p, npages);
|
|
if (IS_ERR(msm_obj->sgt)) {
|
|
void *ptr = ERR_CAST(msm_obj->sgt);
|
|
|
|
dev_err(dev->dev, "failed to allocate sgt\n");
|
|
msm_obj->sgt = NULL;
|
|
return ptr;
|
|
}
|
|
|
|
/* For non-cached buffers, ensure the new pages are clean
|
|
* because display controller, GPU, etc. are not coherent:
|
|
*/
|
|
if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED))
|
|
dma_map_sg(dev->dev, msm_obj->sgt->sgl,
|
|
msm_obj->sgt->nents, DMA_BIDIRECTIONAL);
|
|
}
|
|
|
|
return msm_obj->pages;
|
|
}
|
|
|
|
static void put_pages_vram(struct drm_gem_object *obj)
|
|
{
|
|
struct msm_gem_object *msm_obj = to_msm_bo(obj);
|
|
struct msm_drm_private *priv = obj->dev->dev_private;
|
|
|
|
spin_lock(&priv->vram.lock);
|
|
drm_mm_remove_node(msm_obj->vram_node);
|
|
spin_unlock(&priv->vram.lock);
|
|
|
|
kvfree(msm_obj->pages);
|
|
}
|
|
|
|
static void put_pages(struct drm_gem_object *obj)
|
|
{
|
|
struct msm_gem_object *msm_obj = to_msm_bo(obj);
|
|
|
|
if (msm_obj->pages) {
|
|
/* For non-cached buffers, ensure the new pages are clean
|
|
* because display controller, GPU, etc. are not coherent:
|
|
*/
|
|
if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED))
|
|
dma_unmap_sg(obj->dev->dev, msm_obj->sgt->sgl,
|
|
msm_obj->sgt->nents, DMA_BIDIRECTIONAL);
|
|
|
|
if (msm_obj->sgt)
|
|
sg_free_table(msm_obj->sgt);
|
|
|
|
kfree(msm_obj->sgt);
|
|
|
|
if (use_pages(obj))
|
|
drm_gem_put_pages(obj, msm_obj->pages, true, false);
|
|
else
|
|
put_pages_vram(obj);
|
|
|
|
msm_obj->pages = NULL;
|
|
}
|
|
}
|
|
|
|
struct page **msm_gem_get_pages(struct drm_gem_object *obj)
|
|
{
|
|
struct msm_gem_object *msm_obj = to_msm_bo(obj);
|
|
struct page **p;
|
|
|
|
mutex_lock(&msm_obj->lock);
|
|
|
|
if (WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) {
|
|
mutex_unlock(&msm_obj->lock);
|
|
return ERR_PTR(-EBUSY);
|
|
}
|
|
|
|
p = get_pages(obj);
|
|
mutex_unlock(&msm_obj->lock);
|
|
return p;
|
|
}
|
|
|
|
void msm_gem_put_pages(struct drm_gem_object *obj)
|
|
{
|
|
/* when we start tracking the pin count, then do something here */
|
|
}
|
|
|
|
int msm_gem_mmap_obj(struct drm_gem_object *obj,
|
|
struct vm_area_struct *vma)
|
|
{
|
|
struct msm_gem_object *msm_obj = to_msm_bo(obj);
|
|
|
|
vma->vm_flags &= ~VM_PFNMAP;
|
|
vma->vm_flags |= VM_MIXEDMAP;
|
|
|
|
if (msm_obj->flags & MSM_BO_WC) {
|
|
vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags));
|
|
} else if (msm_obj->flags & MSM_BO_UNCACHED) {
|
|
vma->vm_page_prot = pgprot_noncached(vm_get_page_prot(vma->vm_flags));
|
|
} else {
|
|
/*
|
|
* Shunt off cached objs to shmem file so they have their own
|
|
* address_space (so unmap_mapping_range does what we want,
|
|
* in particular in the case of mmap'd dmabufs)
|
|
*/
|
|
fput(vma->vm_file);
|
|
get_file(obj->filp);
|
|
vma->vm_pgoff = 0;
|
|
vma->vm_file = obj->filp;
|
|
|
|
vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
|
|
{
|
|
int ret;
|
|
|
|
ret = drm_gem_mmap(filp, vma);
|
|
if (ret) {
|
|
DBG("mmap failed: %d", ret);
|
|
return ret;
|
|
}
|
|
|
|
return msm_gem_mmap_obj(vma->vm_private_data, vma);
|
|
}
|
|
|
|
int msm_gem_fault(struct vm_fault *vmf)
|
|
{
|
|
struct vm_area_struct *vma = vmf->vma;
|
|
struct drm_gem_object *obj = vma->vm_private_data;
|
|
struct msm_gem_object *msm_obj = to_msm_bo(obj);
|
|
struct page **pages;
|
|
unsigned long pfn;
|
|
pgoff_t pgoff;
|
|
int ret;
|
|
|
|
/*
|
|
* vm_ops.open/drm_gem_mmap_obj and close get and put
|
|
* a reference on obj. So, we dont need to hold one here.
|
|
*/
|
|
ret = mutex_lock_interruptible(&msm_obj->lock);
|
|
if (ret)
|
|
goto out;
|
|
|
|
if (WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) {
|
|
mutex_unlock(&msm_obj->lock);
|
|
return VM_FAULT_SIGBUS;
|
|
}
|
|
|
|
/* make sure we have pages attached now */
|
|
pages = get_pages(obj);
|
|
if (IS_ERR(pages)) {
|
|
ret = PTR_ERR(pages);
|
|
goto out_unlock;
|
|
}
|
|
|
|
/* We don't use vmf->pgoff since that has the fake offset: */
|
|
pgoff = (vmf->address - vma->vm_start) >> PAGE_SHIFT;
|
|
|
|
pfn = page_to_pfn(pages[pgoff]);
|
|
|
|
VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address,
|
|
pfn, pfn << PAGE_SHIFT);
|
|
|
|
ret = vm_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV));
|
|
|
|
out_unlock:
|
|
mutex_unlock(&msm_obj->lock);
|
|
out:
|
|
switch (ret) {
|
|
case -EAGAIN:
|
|
case 0:
|
|
case -ERESTARTSYS:
|
|
case -EINTR:
|
|
case -EBUSY:
|
|
/*
|
|
* EBUSY is ok: this just means that another thread
|
|
* already did the job.
|
|
*/
|
|
return VM_FAULT_NOPAGE;
|
|
case -ENOMEM:
|
|
return VM_FAULT_OOM;
|
|
default:
|
|
return VM_FAULT_SIGBUS;
|
|
}
|
|
}
|
|
|
|
/** get mmap offset */
|
|
static uint64_t mmap_offset(struct drm_gem_object *obj)
|
|
{
|
|
struct drm_device *dev = obj->dev;
|
|
struct msm_gem_object *msm_obj = to_msm_bo(obj);
|
|
int ret;
|
|
|
|
WARN_ON(!mutex_is_locked(&msm_obj->lock));
|
|
|
|
/* Make it mmapable */
|
|
ret = drm_gem_create_mmap_offset(obj);
|
|
|
|
if (ret) {
|
|
dev_err(dev->dev, "could not allocate mmap offset\n");
|
|
return 0;
|
|
}
|
|
|
|
return drm_vma_node_offset_addr(&obj->vma_node);
|
|
}
|
|
|
|
uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj)
|
|
{
|
|
uint64_t offset;
|
|
struct msm_gem_object *msm_obj = to_msm_bo(obj);
|
|
|
|
mutex_lock(&msm_obj->lock);
|
|
offset = mmap_offset(obj);
|
|
mutex_unlock(&msm_obj->lock);
|
|
return offset;
|
|
}
|
|
|
|
static struct msm_gem_vma *add_vma(struct drm_gem_object *obj,
|
|
struct msm_gem_address_space *aspace)
|
|
{
|
|
struct msm_gem_object *msm_obj = to_msm_bo(obj);
|
|
struct msm_gem_vma *vma;
|
|
|
|
WARN_ON(!mutex_is_locked(&msm_obj->lock));
|
|
|
|
vma = kzalloc(sizeof(*vma), GFP_KERNEL);
|
|
if (!vma)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
vma->aspace = aspace;
|
|
|
|
list_add_tail(&vma->list, &msm_obj->vmas);
|
|
|
|
return vma;
|
|
}
|
|
|
|
static struct msm_gem_vma *lookup_vma(struct drm_gem_object *obj,
|
|
struct msm_gem_address_space *aspace)
|
|
{
|
|
struct msm_gem_object *msm_obj = to_msm_bo(obj);
|
|
struct msm_gem_vma *vma;
|
|
|
|
WARN_ON(!mutex_is_locked(&msm_obj->lock));
|
|
|
|
list_for_each_entry(vma, &msm_obj->vmas, list) {
|
|
if (vma->aspace == aspace)
|
|
return vma;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static void del_vma(struct msm_gem_vma *vma)
|
|
{
|
|
if (!vma)
|
|
return;
|
|
|
|
list_del(&vma->list);
|
|
kfree(vma);
|
|
}
|
|
|
|
/* Called with msm_obj->lock locked */
|
|
static void
|
|
put_iova(struct drm_gem_object *obj)
|
|
{
|
|
struct msm_gem_object *msm_obj = to_msm_bo(obj);
|
|
struct msm_gem_vma *vma, *tmp;
|
|
|
|
WARN_ON(!mutex_is_locked(&msm_obj->lock));
|
|
|
|
list_for_each_entry_safe(vma, tmp, &msm_obj->vmas, list) {
|
|
msm_gem_unmap_vma(vma->aspace, vma, msm_obj->sgt);
|
|
del_vma(vma);
|
|
}
|
|
}
|
|
|
|
/* get iova, taking a reference. Should have a matching put */
|
|
int msm_gem_get_iova(struct drm_gem_object *obj,
|
|
struct msm_gem_address_space *aspace, uint64_t *iova)
|
|
{
|
|
struct msm_gem_object *msm_obj = to_msm_bo(obj);
|
|
struct msm_gem_vma *vma;
|
|
int ret = 0;
|
|
|
|
mutex_lock(&msm_obj->lock);
|
|
|
|
if (WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) {
|
|
mutex_unlock(&msm_obj->lock);
|
|
return -EBUSY;
|
|
}
|
|
|
|
vma = lookup_vma(obj, aspace);
|
|
|
|
if (!vma) {
|
|
struct page **pages;
|
|
|
|
vma = add_vma(obj, aspace);
|
|
if (IS_ERR(vma)) {
|
|
ret = PTR_ERR(vma);
|
|
goto unlock;
|
|
}
|
|
|
|
pages = get_pages(obj);
|
|
if (IS_ERR(pages)) {
|
|
ret = PTR_ERR(pages);
|
|
goto fail;
|
|
}
|
|
|
|
ret = msm_gem_map_vma(aspace, vma, msm_obj->sgt,
|
|
obj->size >> PAGE_SHIFT);
|
|
if (ret)
|
|
goto fail;
|
|
}
|
|
|
|
*iova = vma->iova;
|
|
|
|
mutex_unlock(&msm_obj->lock);
|
|
return 0;
|
|
|
|
fail:
|
|
del_vma(vma);
|
|
unlock:
|
|
mutex_unlock(&msm_obj->lock);
|
|
return ret;
|
|
}
|
|
|
|
/* get iova without taking a reference, used in places where you have
|
|
* already done a 'msm_gem_get_iova()'.
|
|
*/
|
|
uint64_t msm_gem_iova(struct drm_gem_object *obj,
|
|
struct msm_gem_address_space *aspace)
|
|
{
|
|
struct msm_gem_object *msm_obj = to_msm_bo(obj);
|
|
struct msm_gem_vma *vma;
|
|
|
|
mutex_lock(&msm_obj->lock);
|
|
vma = lookup_vma(obj, aspace);
|
|
mutex_unlock(&msm_obj->lock);
|
|
WARN_ON(!vma);
|
|
|
|
return vma ? vma->iova : 0;
|
|
}
|
|
|
|
void msm_gem_put_iova(struct drm_gem_object *obj,
|
|
struct msm_gem_address_space *aspace)
|
|
{
|
|
// XXX TODO ..
|
|
// NOTE: probably don't need a _locked() version.. we wouldn't
|
|
// normally unmap here, but instead just mark that it could be
|
|
// unmapped (if the iova refcnt drops to zero), but then later
|
|
// if another _get_iova_locked() fails we can start unmapping
|
|
// things that are no longer needed..
|
|
}
|
|
|
|
int msm_gem_dumb_create(struct drm_file *file, struct drm_device *dev,
|
|
struct drm_mode_create_dumb *args)
|
|
{
|
|
args->pitch = align_pitch(args->width, args->bpp);
|
|
args->size = PAGE_ALIGN(args->pitch * args->height);
|
|
return msm_gem_new_handle(dev, file, args->size,
|
|
MSM_BO_SCANOUT | MSM_BO_WC, &args->handle);
|
|
}
|
|
|
|
int msm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev,
|
|
uint32_t handle, uint64_t *offset)
|
|
{
|
|
struct drm_gem_object *obj;
|
|
int ret = 0;
|
|
|
|
/* GEM does all our handle to object mapping */
|
|
obj = drm_gem_object_lookup(file, handle);
|
|
if (obj == NULL) {
|
|
ret = -ENOENT;
|
|
goto fail;
|
|
}
|
|
|
|
*offset = msm_gem_mmap_offset(obj);
|
|
|
|
drm_gem_object_put_unlocked(obj);
|
|
|
|
fail:
|
|
return ret;
|
|
}
|
|
|
|
static void *get_vaddr(struct drm_gem_object *obj, unsigned madv)
|
|
{
|
|
struct msm_gem_object *msm_obj = to_msm_bo(obj);
|
|
int ret = 0;
|
|
|
|
mutex_lock(&msm_obj->lock);
|
|
|
|
if (WARN_ON(msm_obj->madv > madv)) {
|
|
dev_err(obj->dev->dev, "Invalid madv state: %u vs %u\n",
|
|
msm_obj->madv, madv);
|
|
mutex_unlock(&msm_obj->lock);
|
|
return ERR_PTR(-EBUSY);
|
|
}
|
|
|
|
/* increment vmap_count *before* vmap() call, so shrinker can
|
|
* check vmap_count (is_vunmapable()) outside of msm_obj->lock.
|
|
* This guarantees that we won't try to msm_gem_vunmap() this
|
|
* same object from within the vmap() call (while we already
|
|
* hold msm_obj->lock)
|
|
*/
|
|
msm_obj->vmap_count++;
|
|
|
|
if (!msm_obj->vaddr) {
|
|
struct page **pages = get_pages(obj);
|
|
if (IS_ERR(pages)) {
|
|
ret = PTR_ERR(pages);
|
|
goto fail;
|
|
}
|
|
msm_obj->vaddr = vmap(pages, obj->size >> PAGE_SHIFT,
|
|
VM_MAP, pgprot_writecombine(PAGE_KERNEL));
|
|
if (msm_obj->vaddr == NULL) {
|
|
ret = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
mutex_unlock(&msm_obj->lock);
|
|
return msm_obj->vaddr;
|
|
|
|
fail:
|
|
msm_obj->vmap_count--;
|
|
mutex_unlock(&msm_obj->lock);
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
void *msm_gem_get_vaddr(struct drm_gem_object *obj)
|
|
{
|
|
return get_vaddr(obj, MSM_MADV_WILLNEED);
|
|
}
|
|
|
|
/*
|
|
* Don't use this! It is for the very special case of dumping
|
|
* submits from GPU hangs or faults, were the bo may already
|
|
* be MSM_MADV_DONTNEED, but we know the buffer is still on the
|
|
* active list.
|
|
*/
|
|
void *msm_gem_get_vaddr_active(struct drm_gem_object *obj)
|
|
{
|
|
return get_vaddr(obj, __MSM_MADV_PURGED);
|
|
}
|
|
|
|
void msm_gem_put_vaddr(struct drm_gem_object *obj)
|
|
{
|
|
struct msm_gem_object *msm_obj = to_msm_bo(obj);
|
|
|
|
mutex_lock(&msm_obj->lock);
|
|
WARN_ON(msm_obj->vmap_count < 1);
|
|
msm_obj->vmap_count--;
|
|
mutex_unlock(&msm_obj->lock);
|
|
}
|
|
|
|
/* Update madvise status, returns true if not purged, else
|
|
* false or -errno.
|
|
*/
|
|
int msm_gem_madvise(struct drm_gem_object *obj, unsigned madv)
|
|
{
|
|
struct msm_gem_object *msm_obj = to_msm_bo(obj);
|
|
|
|
mutex_lock(&msm_obj->lock);
|
|
|
|
WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex));
|
|
|
|
if (msm_obj->madv != __MSM_MADV_PURGED)
|
|
msm_obj->madv = madv;
|
|
|
|
madv = msm_obj->madv;
|
|
|
|
mutex_unlock(&msm_obj->lock);
|
|
|
|
return (madv != __MSM_MADV_PURGED);
|
|
}
|
|
|
|
void msm_gem_purge(struct drm_gem_object *obj, enum msm_gem_lock subclass)
|
|
{
|
|
struct drm_device *dev = obj->dev;
|
|
struct msm_gem_object *msm_obj = to_msm_bo(obj);
|
|
|
|
WARN_ON(!mutex_is_locked(&dev->struct_mutex));
|
|
WARN_ON(!is_purgeable(msm_obj));
|
|
WARN_ON(obj->import_attach);
|
|
|
|
mutex_lock_nested(&msm_obj->lock, subclass);
|
|
|
|
put_iova(obj);
|
|
|
|
msm_gem_vunmap_locked(obj);
|
|
|
|
put_pages(obj);
|
|
|
|
msm_obj->madv = __MSM_MADV_PURGED;
|
|
|
|
drm_vma_node_unmap(&obj->vma_node, dev->anon_inode->i_mapping);
|
|
drm_gem_free_mmap_offset(obj);
|
|
|
|
/* Our goal here is to return as much of the memory as
|
|
* is possible back to the system as we are called from OOM.
|
|
* To do this we must instruct the shmfs to drop all of its
|
|
* backing pages, *now*.
|
|
*/
|
|
shmem_truncate_range(file_inode(obj->filp), 0, (loff_t)-1);
|
|
|
|
invalidate_mapping_pages(file_inode(obj->filp)->i_mapping,
|
|
0, (loff_t)-1);
|
|
|
|
mutex_unlock(&msm_obj->lock);
|
|
}
|
|
|
|
static void msm_gem_vunmap_locked(struct drm_gem_object *obj)
|
|
{
|
|
struct msm_gem_object *msm_obj = to_msm_bo(obj);
|
|
|
|
WARN_ON(!mutex_is_locked(&msm_obj->lock));
|
|
|
|
if (!msm_obj->vaddr || WARN_ON(!is_vunmapable(msm_obj)))
|
|
return;
|
|
|
|
vunmap(msm_obj->vaddr);
|
|
msm_obj->vaddr = NULL;
|
|
}
|
|
|
|
void msm_gem_vunmap(struct drm_gem_object *obj, enum msm_gem_lock subclass)
|
|
{
|
|
struct msm_gem_object *msm_obj = to_msm_bo(obj);
|
|
|
|
mutex_lock_nested(&msm_obj->lock, subclass);
|
|
msm_gem_vunmap_locked(obj);
|
|
mutex_unlock(&msm_obj->lock);
|
|
}
|
|
|
|
/* must be called before _move_to_active().. */
|
|
int msm_gem_sync_object(struct drm_gem_object *obj,
|
|
struct msm_fence_context *fctx, bool exclusive)
|
|
{
|
|
struct msm_gem_object *msm_obj = to_msm_bo(obj);
|
|
struct reservation_object_list *fobj;
|
|
struct dma_fence *fence;
|
|
int i, ret;
|
|
|
|
fobj = reservation_object_get_list(msm_obj->resv);
|
|
if (!fobj || (fobj->shared_count == 0)) {
|
|
fence = reservation_object_get_excl(msm_obj->resv);
|
|
/* don't need to wait on our own fences, since ring is fifo */
|
|
if (fence && (fence->context != fctx->context)) {
|
|
ret = dma_fence_wait(fence, true);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
if (!exclusive || !fobj)
|
|
return 0;
|
|
|
|
for (i = 0; i < fobj->shared_count; i++) {
|
|
fence = rcu_dereference_protected(fobj->shared[i],
|
|
reservation_object_held(msm_obj->resv));
|
|
if (fence->context != fctx->context) {
|
|
ret = dma_fence_wait(fence, true);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void msm_gem_move_to_active(struct drm_gem_object *obj,
|
|
struct msm_gpu *gpu, bool exclusive, struct dma_fence *fence)
|
|
{
|
|
struct msm_gem_object *msm_obj = to_msm_bo(obj);
|
|
WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED);
|
|
msm_obj->gpu = gpu;
|
|
if (exclusive)
|
|
reservation_object_add_excl_fence(msm_obj->resv, fence);
|
|
else
|
|
reservation_object_add_shared_fence(msm_obj->resv, fence);
|
|
list_del_init(&msm_obj->mm_list);
|
|
list_add_tail(&msm_obj->mm_list, &gpu->active_list);
|
|
}
|
|
|
|
void msm_gem_move_to_inactive(struct drm_gem_object *obj)
|
|
{
|
|
struct drm_device *dev = obj->dev;
|
|
struct msm_drm_private *priv = dev->dev_private;
|
|
struct msm_gem_object *msm_obj = to_msm_bo(obj);
|
|
|
|
WARN_ON(!mutex_is_locked(&dev->struct_mutex));
|
|
|
|
msm_obj->gpu = NULL;
|
|
list_del_init(&msm_obj->mm_list);
|
|
list_add_tail(&msm_obj->mm_list, &priv->inactive_list);
|
|
}
|
|
|
|
int msm_gem_cpu_prep(struct drm_gem_object *obj, uint32_t op, ktime_t *timeout)
|
|
{
|
|
struct msm_gem_object *msm_obj = to_msm_bo(obj);
|
|
bool write = !!(op & MSM_PREP_WRITE);
|
|
unsigned long remain =
|
|
op & MSM_PREP_NOSYNC ? 0 : timeout_to_jiffies(timeout);
|
|
long ret;
|
|
|
|
ret = reservation_object_wait_timeout_rcu(msm_obj->resv, write,
|
|
true, remain);
|
|
if (ret == 0)
|
|
return remain == 0 ? -EBUSY : -ETIMEDOUT;
|
|
else if (ret < 0)
|
|
return ret;
|
|
|
|
/* TODO cache maintenance */
|
|
|
|
return 0;
|
|
}
|
|
|
|
int msm_gem_cpu_fini(struct drm_gem_object *obj)
|
|
{
|
|
/* TODO cache maintenance */
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
static void describe_fence(struct dma_fence *fence, const char *type,
|
|
struct seq_file *m)
|
|
{
|
|
if (!dma_fence_is_signaled(fence))
|
|
seq_printf(m, "\t%9s: %s %s seq %u\n", type,
|
|
fence->ops->get_driver_name(fence),
|
|
fence->ops->get_timeline_name(fence),
|
|
fence->seqno);
|
|
}
|
|
|
|
void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m)
|
|
{
|
|
struct msm_gem_object *msm_obj = to_msm_bo(obj);
|
|
struct reservation_object *robj = msm_obj->resv;
|
|
struct reservation_object_list *fobj;
|
|
struct dma_fence *fence;
|
|
struct msm_gem_vma *vma;
|
|
uint64_t off = drm_vma_node_start(&obj->vma_node);
|
|
const char *madv;
|
|
|
|
mutex_lock(&msm_obj->lock);
|
|
|
|
switch (msm_obj->madv) {
|
|
case __MSM_MADV_PURGED:
|
|
madv = " purged";
|
|
break;
|
|
case MSM_MADV_DONTNEED:
|
|
madv = " purgeable";
|
|
break;
|
|
case MSM_MADV_WILLNEED:
|
|
default:
|
|
madv = "";
|
|
break;
|
|
}
|
|
|
|
seq_printf(m, "%08x: %c %2d (%2d) %08llx %p\t",
|
|
msm_obj->flags, is_active(msm_obj) ? 'A' : 'I',
|
|
obj->name, kref_read(&obj->refcount),
|
|
off, msm_obj->vaddr);
|
|
|
|
/* FIXME: we need to print the address space here too */
|
|
list_for_each_entry(vma, &msm_obj->vmas, list)
|
|
seq_printf(m, " %08llx", vma->iova);
|
|
|
|
seq_printf(m, " %zu%s\n", obj->size, madv);
|
|
|
|
rcu_read_lock();
|
|
fobj = rcu_dereference(robj->fence);
|
|
if (fobj) {
|
|
unsigned int i, shared_count = fobj->shared_count;
|
|
|
|
for (i = 0; i < shared_count; i++) {
|
|
fence = rcu_dereference(fobj->shared[i]);
|
|
describe_fence(fence, "Shared", m);
|
|
}
|
|
}
|
|
|
|
fence = rcu_dereference(robj->fence_excl);
|
|
if (fence)
|
|
describe_fence(fence, "Exclusive", m);
|
|
rcu_read_unlock();
|
|
|
|
mutex_unlock(&msm_obj->lock);
|
|
}
|
|
|
|
void msm_gem_describe_objects(struct list_head *list, struct seq_file *m)
|
|
{
|
|
struct msm_gem_object *msm_obj;
|
|
int count = 0;
|
|
size_t size = 0;
|
|
|
|
list_for_each_entry(msm_obj, list, mm_list) {
|
|
struct drm_gem_object *obj = &msm_obj->base;
|
|
seq_printf(m, " ");
|
|
msm_gem_describe(obj, m);
|
|
count++;
|
|
size += obj->size;
|
|
}
|
|
|
|
seq_printf(m, "Total %d objects, %zu bytes\n", count, size);
|
|
}
|
|
#endif
|
|
|
|
/* don't call directly! Use drm_gem_object_put() and friends */
|
|
void msm_gem_free_object(struct drm_gem_object *obj)
|
|
{
|
|
struct drm_device *dev = obj->dev;
|
|
struct msm_gem_object *msm_obj = to_msm_bo(obj);
|
|
|
|
WARN_ON(!mutex_is_locked(&dev->struct_mutex));
|
|
|
|
/* object should not be on active list: */
|
|
WARN_ON(is_active(msm_obj));
|
|
|
|
list_del(&msm_obj->mm_list);
|
|
|
|
mutex_lock(&msm_obj->lock);
|
|
|
|
put_iova(obj);
|
|
|
|
if (obj->import_attach) {
|
|
if (msm_obj->vaddr)
|
|
dma_buf_vunmap(obj->import_attach->dmabuf, msm_obj->vaddr);
|
|
|
|
/* Don't drop the pages for imported dmabuf, as they are not
|
|
* ours, just free the array we allocated:
|
|
*/
|
|
if (msm_obj->pages)
|
|
kvfree(msm_obj->pages);
|
|
|
|
drm_prime_gem_destroy(obj, msm_obj->sgt);
|
|
} else {
|
|
msm_gem_vunmap_locked(obj);
|
|
put_pages(obj);
|
|
}
|
|
|
|
if (msm_obj->resv == &msm_obj->_resv)
|
|
reservation_object_fini(msm_obj->resv);
|
|
|
|
drm_gem_object_release(obj);
|
|
|
|
mutex_unlock(&msm_obj->lock);
|
|
kfree(msm_obj);
|
|
}
|
|
|
|
/* convenience method to construct a GEM buffer object, and userspace handle */
|
|
int msm_gem_new_handle(struct drm_device *dev, struct drm_file *file,
|
|
uint32_t size, uint32_t flags, uint32_t *handle)
|
|
{
|
|
struct drm_gem_object *obj;
|
|
int ret;
|
|
|
|
obj = msm_gem_new(dev, size, flags);
|
|
|
|
if (IS_ERR(obj))
|
|
return PTR_ERR(obj);
|
|
|
|
ret = drm_gem_handle_create(file, obj, handle);
|
|
|
|
/* drop reference from allocate - handle holds it now */
|
|
drm_gem_object_put_unlocked(obj);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int msm_gem_new_impl(struct drm_device *dev,
|
|
uint32_t size, uint32_t flags,
|
|
struct reservation_object *resv,
|
|
struct drm_gem_object **obj,
|
|
bool struct_mutex_locked)
|
|
{
|
|
struct msm_drm_private *priv = dev->dev_private;
|
|
struct msm_gem_object *msm_obj;
|
|
|
|
switch (flags & MSM_BO_CACHE_MASK) {
|
|
case MSM_BO_UNCACHED:
|
|
case MSM_BO_CACHED:
|
|
case MSM_BO_WC:
|
|
break;
|
|
default:
|
|
dev_err(dev->dev, "invalid cache flag: %x\n",
|
|
(flags & MSM_BO_CACHE_MASK));
|
|
return -EINVAL;
|
|
}
|
|
|
|
msm_obj = kzalloc(sizeof(*msm_obj), GFP_KERNEL);
|
|
if (!msm_obj)
|
|
return -ENOMEM;
|
|
|
|
mutex_init(&msm_obj->lock);
|
|
|
|
msm_obj->flags = flags;
|
|
msm_obj->madv = MSM_MADV_WILLNEED;
|
|
|
|
if (resv) {
|
|
msm_obj->resv = resv;
|
|
} else {
|
|
msm_obj->resv = &msm_obj->_resv;
|
|
reservation_object_init(msm_obj->resv);
|
|
}
|
|
|
|
INIT_LIST_HEAD(&msm_obj->submit_entry);
|
|
INIT_LIST_HEAD(&msm_obj->vmas);
|
|
|
|
if (struct_mutex_locked) {
|
|
WARN_ON(!mutex_is_locked(&dev->struct_mutex));
|
|
list_add_tail(&msm_obj->mm_list, &priv->inactive_list);
|
|
} else {
|
|
mutex_lock(&dev->struct_mutex);
|
|
list_add_tail(&msm_obj->mm_list, &priv->inactive_list);
|
|
mutex_unlock(&dev->struct_mutex);
|
|
}
|
|
|
|
*obj = &msm_obj->base;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct drm_gem_object *_msm_gem_new(struct drm_device *dev,
|
|
uint32_t size, uint32_t flags, bool struct_mutex_locked)
|
|
{
|
|
struct msm_drm_private *priv = dev->dev_private;
|
|
struct drm_gem_object *obj = NULL;
|
|
bool use_vram = false;
|
|
int ret;
|
|
|
|
size = PAGE_ALIGN(size);
|
|
|
|
if (!iommu_present(&platform_bus_type))
|
|
use_vram = true;
|
|
else if ((flags & MSM_BO_STOLEN) && priv->vram.size)
|
|
use_vram = true;
|
|
|
|
if (WARN_ON(use_vram && !priv->vram.size))
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
/* Disallow zero sized objects as they make the underlying
|
|
* infrastructure grumpy
|
|
*/
|
|
if (size == 0)
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
ret = msm_gem_new_impl(dev, size, flags, NULL, &obj, struct_mutex_locked);
|
|
if (ret)
|
|
goto fail;
|
|
|
|
if (use_vram) {
|
|
struct msm_gem_vma *vma;
|
|
struct page **pages;
|
|
struct msm_gem_object *msm_obj = to_msm_bo(obj);
|
|
|
|
mutex_lock(&msm_obj->lock);
|
|
|
|
vma = add_vma(obj, NULL);
|
|
mutex_unlock(&msm_obj->lock);
|
|
if (IS_ERR(vma)) {
|
|
ret = PTR_ERR(vma);
|
|
goto fail;
|
|
}
|
|
|
|
to_msm_bo(obj)->vram_node = &vma->node;
|
|
|
|
drm_gem_private_object_init(dev, obj, size);
|
|
|
|
pages = get_pages(obj);
|
|
if (IS_ERR(pages)) {
|
|
ret = PTR_ERR(pages);
|
|
goto fail;
|
|
}
|
|
|
|
vma->iova = physaddr(obj);
|
|
} else {
|
|
ret = drm_gem_object_init(dev, obj, size);
|
|
if (ret)
|
|
goto fail;
|
|
}
|
|
|
|
return obj;
|
|
|
|
fail:
|
|
drm_gem_object_put_unlocked(obj);
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
struct drm_gem_object *msm_gem_new_locked(struct drm_device *dev,
|
|
uint32_t size, uint32_t flags)
|
|
{
|
|
return _msm_gem_new(dev, size, flags, true);
|
|
}
|
|
|
|
struct drm_gem_object *msm_gem_new(struct drm_device *dev,
|
|
uint32_t size, uint32_t flags)
|
|
{
|
|
return _msm_gem_new(dev, size, flags, false);
|
|
}
|
|
|
|
struct drm_gem_object *msm_gem_import(struct drm_device *dev,
|
|
struct dma_buf *dmabuf, struct sg_table *sgt)
|
|
{
|
|
struct msm_gem_object *msm_obj;
|
|
struct drm_gem_object *obj;
|
|
uint32_t size;
|
|
int ret, npages;
|
|
|
|
/* if we don't have IOMMU, don't bother pretending we can import: */
|
|
if (!iommu_present(&platform_bus_type)) {
|
|
dev_err(dev->dev, "cannot import without IOMMU\n");
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
|
|
size = PAGE_ALIGN(dmabuf->size);
|
|
|
|
ret = msm_gem_new_impl(dev, size, MSM_BO_WC, dmabuf->resv, &obj, false);
|
|
if (ret)
|
|
goto fail;
|
|
|
|
drm_gem_private_object_init(dev, obj, size);
|
|
|
|
npages = size / PAGE_SIZE;
|
|
|
|
msm_obj = to_msm_bo(obj);
|
|
mutex_lock(&msm_obj->lock);
|
|
msm_obj->sgt = sgt;
|
|
msm_obj->pages = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
|
|
if (!msm_obj->pages) {
|
|
mutex_unlock(&msm_obj->lock);
|
|
ret = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
ret = drm_prime_sg_to_page_addr_arrays(sgt, msm_obj->pages, NULL, npages);
|
|
if (ret) {
|
|
mutex_unlock(&msm_obj->lock);
|
|
goto fail;
|
|
}
|
|
|
|
mutex_unlock(&msm_obj->lock);
|
|
return obj;
|
|
|
|
fail:
|
|
drm_gem_object_put_unlocked(obj);
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
static void *_msm_gem_kernel_new(struct drm_device *dev, uint32_t size,
|
|
uint32_t flags, struct msm_gem_address_space *aspace,
|
|
struct drm_gem_object **bo, uint64_t *iova, bool locked)
|
|
{
|
|
void *vaddr;
|
|
struct drm_gem_object *obj = _msm_gem_new(dev, size, flags, locked);
|
|
int ret;
|
|
|
|
if (IS_ERR(obj))
|
|
return ERR_CAST(obj);
|
|
|
|
if (iova) {
|
|
ret = msm_gem_get_iova(obj, aspace, iova);
|
|
if (ret) {
|
|
drm_gem_object_put(obj);
|
|
return ERR_PTR(ret);
|
|
}
|
|
}
|
|
|
|
vaddr = msm_gem_get_vaddr(obj);
|
|
if (IS_ERR(vaddr)) {
|
|
msm_gem_put_iova(obj, aspace);
|
|
drm_gem_object_put(obj);
|
|
return ERR_CAST(vaddr);
|
|
}
|
|
|
|
if (bo)
|
|
*bo = obj;
|
|
|
|
return vaddr;
|
|
}
|
|
|
|
void *msm_gem_kernel_new(struct drm_device *dev, uint32_t size,
|
|
uint32_t flags, struct msm_gem_address_space *aspace,
|
|
struct drm_gem_object **bo, uint64_t *iova)
|
|
{
|
|
return _msm_gem_kernel_new(dev, size, flags, aspace, bo, iova, false);
|
|
}
|
|
|
|
void *msm_gem_kernel_new_locked(struct drm_device *dev, uint32_t size,
|
|
uint32_t flags, struct msm_gem_address_space *aspace,
|
|
struct drm_gem_object **bo, uint64_t *iova)
|
|
{
|
|
return _msm_gem_kernel_new(dev, size, flags, aspace, bo, iova, true);
|
|
}
|