1484 lines
39 KiB
C
1484 lines
39 KiB
C
/*
|
|
* drivers/staging/omapdrm/omap_gem.c
|
|
*
|
|
* Copyright (C) 2011 Texas Instruments
|
|
* Author: Rob Clark <rob.clark@linaro.org>
|
|
*
|
|
* 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 "omap_drv.h"
|
|
#include "omap_dmm_tiler.h"
|
|
|
|
/* remove these once drm core helpers are merged */
|
|
struct page **_drm_gem_get_pages(struct drm_gem_object *obj, gfp_t gfpmask);
|
|
void _drm_gem_put_pages(struct drm_gem_object *obj, struct page **pages,
|
|
bool dirty, bool accessed);
|
|
int _drm_gem_create_mmap_offset_size(struct drm_gem_object *obj, size_t size);
|
|
|
|
/*
|
|
* GEM buffer object implementation.
|
|
*/
|
|
|
|
#define to_omap_bo(x) container_of(x, struct omap_gem_object, base)
|
|
|
|
/* note: we use upper 8 bits of flags for driver-internal flags: */
|
|
#define OMAP_BO_DMA 0x01000000 /* actually is physically contiguous */
|
|
#define OMAP_BO_EXT_SYNC 0x02000000 /* externally allocated sync object */
|
|
#define OMAP_BO_EXT_MEM 0x04000000 /* externally allocated memory */
|
|
|
|
|
|
struct omap_gem_object {
|
|
struct drm_gem_object base;
|
|
|
|
struct list_head mm_list;
|
|
|
|
uint32_t flags;
|
|
|
|
/** width/height for tiled formats (rounded up to slot boundaries) */
|
|
uint16_t width, height;
|
|
|
|
/** roll applied when mapping to DMM */
|
|
uint32_t roll;
|
|
|
|
/**
|
|
* If buffer is allocated physically contiguous, the OMAP_BO_DMA flag
|
|
* is set and the paddr is valid. Also if the buffer is remapped in
|
|
* TILER and paddr_cnt > 0, then paddr is valid. But if you are using
|
|
* the physical address and OMAP_BO_DMA is not set, then you should
|
|
* be going thru omap_gem_{get,put}_paddr() to ensure the mapping is
|
|
* not removed from under your feet.
|
|
*
|
|
* Note that OMAP_BO_SCANOUT is a hint from userspace that DMA capable
|
|
* buffer is requested, but doesn't mean that it is. Use the
|
|
* OMAP_BO_DMA flag to determine if the buffer has a DMA capable
|
|
* physical address.
|
|
*/
|
|
dma_addr_t paddr;
|
|
|
|
/**
|
|
* # of users of paddr
|
|
*/
|
|
uint32_t paddr_cnt;
|
|
|
|
/**
|
|
* tiler block used when buffer is remapped in DMM/TILER.
|
|
*/
|
|
struct tiler_block *block;
|
|
|
|
/**
|
|
* Array of backing pages, if allocated. Note that pages are never
|
|
* allocated for buffers originally allocated from contiguous memory
|
|
*/
|
|
struct page **pages;
|
|
|
|
/** addresses corresponding to pages in above array */
|
|
dma_addr_t *addrs;
|
|
|
|
/**
|
|
* Virtual address, if mapped.
|
|
*/
|
|
void *vaddr;
|
|
|
|
/**
|
|
* sync-object allocated on demand (if needed)
|
|
*
|
|
* Per-buffer sync-object for tracking pending and completed hw/dma
|
|
* read and write operations. The layout in memory is dictated by
|
|
* the SGX firmware, which uses this information to stall the command
|
|
* stream if a surface is not ready yet.
|
|
*
|
|
* Note that when buffer is used by SGX, the sync-object needs to be
|
|
* allocated from a special heap of sync-objects. This way many sync
|
|
* objects can be packed in a page, and not waste GPU virtual address
|
|
* space. Because of this we have to have a omap_gem_set_sync_object()
|
|
* API to allow replacement of the syncobj after it has (potentially)
|
|
* already been allocated. A bit ugly but I haven't thought of a
|
|
* better alternative.
|
|
*/
|
|
struct {
|
|
uint32_t write_pending;
|
|
uint32_t write_complete;
|
|
uint32_t read_pending;
|
|
uint32_t read_complete;
|
|
} *sync;
|
|
};
|
|
|
|
static int get_pages(struct drm_gem_object *obj, struct page ***pages);
|
|
static uint64_t mmap_offset(struct drm_gem_object *obj);
|
|
|
|
/* To deal with userspace mmap'ings of 2d tiled buffers, which (a) are
|
|
* not necessarily pinned in TILER all the time, and (b) when they are
|
|
* they are not necessarily page aligned, we reserve one or more small
|
|
* regions in each of the 2d containers to use as a user-GART where we
|
|
* can create a second page-aligned mapping of parts of the buffer
|
|
* being accessed from userspace.
|
|
*
|
|
* Note that we could optimize slightly when we know that multiple
|
|
* tiler containers are backed by the same PAT.. but I'll leave that
|
|
* for later..
|
|
*/
|
|
#define NUM_USERGART_ENTRIES 2
|
|
struct usergart_entry {
|
|
struct tiler_block *block; /* the reserved tiler block */
|
|
dma_addr_t paddr;
|
|
struct drm_gem_object *obj; /* the current pinned obj */
|
|
pgoff_t obj_pgoff; /* page offset of obj currently
|
|
mapped in */
|
|
};
|
|
static struct {
|
|
struct usergart_entry entry[NUM_USERGART_ENTRIES];
|
|
int height; /* height in rows */
|
|
int height_shift; /* ilog2(height in rows) */
|
|
int slot_shift; /* ilog2(width per slot) */
|
|
int stride_pfn; /* stride in pages */
|
|
int last; /* index of last used entry */
|
|
} *usergart;
|
|
|
|
static void evict_entry(struct drm_gem_object *obj,
|
|
enum tiler_fmt fmt, struct usergart_entry *entry)
|
|
{
|
|
if (obj->dev->dev_mapping) {
|
|
struct omap_gem_object *omap_obj = to_omap_bo(obj);
|
|
int n = usergart[fmt].height;
|
|
size_t size = PAGE_SIZE * n;
|
|
loff_t off = mmap_offset(obj) +
|
|
(entry->obj_pgoff << PAGE_SHIFT);
|
|
const int m = 1 + ((omap_obj->width << fmt) / PAGE_SIZE);
|
|
if (m > 1) {
|
|
int i;
|
|
/* if stride > than PAGE_SIZE then sparse mapping: */
|
|
for (i = n; i > 0; i--) {
|
|
unmap_mapping_range(obj->dev->dev_mapping,
|
|
off, PAGE_SIZE, 1);
|
|
off += PAGE_SIZE * m;
|
|
}
|
|
} else {
|
|
unmap_mapping_range(obj->dev->dev_mapping, off, size, 1);
|
|
}
|
|
}
|
|
|
|
entry->obj = NULL;
|
|
}
|
|
|
|
/* Evict a buffer from usergart, if it is mapped there */
|
|
static void evict(struct drm_gem_object *obj)
|
|
{
|
|
struct omap_gem_object *omap_obj = to_omap_bo(obj);
|
|
|
|
if (omap_obj->flags & OMAP_BO_TILED) {
|
|
enum tiler_fmt fmt = gem2fmt(omap_obj->flags);
|
|
int i;
|
|
|
|
if (!usergart)
|
|
return;
|
|
|
|
for (i = 0; i < NUM_USERGART_ENTRIES; i++) {
|
|
struct usergart_entry *entry = &usergart[fmt].entry[i];
|
|
if (entry->obj == obj)
|
|
evict_entry(obj, fmt, entry);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* GEM objects can either be allocated from contiguous memory (in which
|
|
* case obj->filp==NULL), or w/ shmem backing (obj->filp!=NULL). But non
|
|
* contiguous buffers can be remapped in TILER/DMM if they need to be
|
|
* contiguous... but we don't do this all the time to reduce pressure
|
|
* on TILER/DMM space when we know at allocation time that the buffer
|
|
* will need to be scanned out.
|
|
*/
|
|
static inline bool is_shmem(struct drm_gem_object *obj)
|
|
{
|
|
return obj->filp != NULL;
|
|
}
|
|
|
|
/**
|
|
* shmem buffers that are mapped cached can simulate coherency via using
|
|
* page faulting to keep track of dirty pages
|
|
*/
|
|
static inline bool is_cached_coherent(struct drm_gem_object *obj)
|
|
{
|
|
struct omap_gem_object *omap_obj = to_omap_bo(obj);
|
|
return is_shmem(obj) &&
|
|
((omap_obj->flags & OMAP_BO_CACHE_MASK) == OMAP_BO_CACHED);
|
|
}
|
|
|
|
static DEFINE_SPINLOCK(sync_lock);
|
|
|
|
/** ensure backing pages are allocated */
|
|
static int omap_gem_attach_pages(struct drm_gem_object *obj)
|
|
{
|
|
struct drm_device *dev = obj->dev;
|
|
struct omap_gem_object *omap_obj = to_omap_bo(obj);
|
|
struct page **pages;
|
|
int npages = obj->size >> PAGE_SHIFT;
|
|
int i, ret;
|
|
dma_addr_t *addrs;
|
|
|
|
WARN_ON(omap_obj->pages);
|
|
|
|
/* TODO: __GFP_DMA32 .. but somehow GFP_HIGHMEM is coming from the
|
|
* mapping_gfp_mask(mapping) which conflicts w/ GFP_DMA32.. probably
|
|
* we actually want CMA memory for it all anyways..
|
|
*/
|
|
pages = _drm_gem_get_pages(obj, GFP_KERNEL);
|
|
if (IS_ERR(pages)) {
|
|
dev_err(obj->dev->dev, "could not get pages: %ld\n", PTR_ERR(pages));
|
|
return PTR_ERR(pages);
|
|
}
|
|
|
|
/* for non-cached buffers, ensure the new pages are clean because
|
|
* DSS, GPU, etc. are not cache coherent:
|
|
*/
|
|
if (omap_obj->flags & (OMAP_BO_WC|OMAP_BO_UNCACHED)) {
|
|
addrs = kmalloc(npages * sizeof(*addrs), GFP_KERNEL);
|
|
if (!addrs) {
|
|
ret = -ENOMEM;
|
|
goto free_pages;
|
|
}
|
|
|
|
for (i = 0; i < npages; i++) {
|
|
addrs[i] = dma_map_page(dev->dev, pages[i],
|
|
0, PAGE_SIZE, DMA_BIDIRECTIONAL);
|
|
}
|
|
} else {
|
|
addrs = kzalloc(npages * sizeof(*addrs), GFP_KERNEL);
|
|
if (!addrs) {
|
|
ret = -ENOMEM;
|
|
goto free_pages;
|
|
}
|
|
}
|
|
|
|
omap_obj->addrs = addrs;
|
|
omap_obj->pages = pages;
|
|
|
|
return 0;
|
|
|
|
free_pages:
|
|
_drm_gem_put_pages(obj, pages, true, false);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/** release backing pages */
|
|
static void omap_gem_detach_pages(struct drm_gem_object *obj)
|
|
{
|
|
struct omap_gem_object *omap_obj = to_omap_bo(obj);
|
|
|
|
/* for non-cached buffers, ensure the new pages are clean because
|
|
* DSS, GPU, etc. are not cache coherent:
|
|
*/
|
|
if (omap_obj->flags & (OMAP_BO_WC|OMAP_BO_UNCACHED)) {
|
|
int i, npages = obj->size >> PAGE_SHIFT;
|
|
for (i = 0; i < npages; i++) {
|
|
dma_unmap_page(obj->dev->dev, omap_obj->addrs[i],
|
|
PAGE_SIZE, DMA_BIDIRECTIONAL);
|
|
}
|
|
}
|
|
|
|
kfree(omap_obj->addrs);
|
|
omap_obj->addrs = NULL;
|
|
|
|
_drm_gem_put_pages(obj, omap_obj->pages, true, false);
|
|
omap_obj->pages = NULL;
|
|
}
|
|
|
|
/* get buffer flags */
|
|
uint32_t omap_gem_flags(struct drm_gem_object *obj)
|
|
{
|
|
return to_omap_bo(obj)->flags;
|
|
}
|
|
|
|
/** get mmap offset */
|
|
static uint64_t mmap_offset(struct drm_gem_object *obj)
|
|
{
|
|
struct drm_device *dev = obj->dev;
|
|
|
|
WARN_ON(!mutex_is_locked(&dev->struct_mutex));
|
|
|
|
if (!obj->map_list.map) {
|
|
/* Make it mmapable */
|
|
size_t size = omap_gem_mmap_size(obj);
|
|
int ret = _drm_gem_create_mmap_offset_size(obj, size);
|
|
|
|
if (ret) {
|
|
dev_err(dev->dev, "could not allocate mmap offset\n");
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return (uint64_t)obj->map_list.hash.key << PAGE_SHIFT;
|
|
}
|
|
|
|
uint64_t omap_gem_mmap_offset(struct drm_gem_object *obj)
|
|
{
|
|
uint64_t offset;
|
|
mutex_lock(&obj->dev->struct_mutex);
|
|
offset = mmap_offset(obj);
|
|
mutex_unlock(&obj->dev->struct_mutex);
|
|
return offset;
|
|
}
|
|
|
|
/** get mmap size */
|
|
size_t omap_gem_mmap_size(struct drm_gem_object *obj)
|
|
{
|
|
struct omap_gem_object *omap_obj = to_omap_bo(obj);
|
|
size_t size = obj->size;
|
|
|
|
if (omap_obj->flags & OMAP_BO_TILED) {
|
|
/* for tiled buffers, the virtual size has stride rounded up
|
|
* to 4kb.. (to hide the fact that row n+1 might start 16kb or
|
|
* 32kb later!). But we don't back the entire buffer with
|
|
* pages, only the valid picture part.. so need to adjust for
|
|
* this in the size used to mmap and generate mmap offset
|
|
*/
|
|
size = tiler_vsize(gem2fmt(omap_obj->flags),
|
|
omap_obj->width, omap_obj->height);
|
|
}
|
|
|
|
return size;
|
|
}
|
|
|
|
/* get tiled size, returns -EINVAL if not tiled buffer */
|
|
int omap_gem_tiled_size(struct drm_gem_object *obj, uint16_t *w, uint16_t *h)
|
|
{
|
|
struct omap_gem_object *omap_obj = to_omap_bo(obj);
|
|
if (omap_obj->flags & OMAP_BO_TILED) {
|
|
*w = omap_obj->width;
|
|
*h = omap_obj->height;
|
|
return 0;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Normal handling for the case of faulting in non-tiled buffers */
|
|
static int fault_1d(struct drm_gem_object *obj,
|
|
struct vm_area_struct *vma, struct vm_fault *vmf)
|
|
{
|
|
struct omap_gem_object *omap_obj = to_omap_bo(obj);
|
|
unsigned long pfn;
|
|
pgoff_t pgoff;
|
|
|
|
/* We don't use vmf->pgoff since that has the fake offset: */
|
|
pgoff = ((unsigned long)vmf->virtual_address -
|
|
vma->vm_start) >> PAGE_SHIFT;
|
|
|
|
if (omap_obj->pages) {
|
|
omap_gem_cpu_sync(obj, pgoff);
|
|
pfn = page_to_pfn(omap_obj->pages[pgoff]);
|
|
} else {
|
|
BUG_ON(!(omap_obj->flags & OMAP_BO_DMA));
|
|
pfn = (omap_obj->paddr >> PAGE_SHIFT) + pgoff;
|
|
}
|
|
|
|
VERB("Inserting %p pfn %lx, pa %lx", vmf->virtual_address,
|
|
pfn, pfn << PAGE_SHIFT);
|
|
|
|
return vm_insert_mixed(vma, (unsigned long)vmf->virtual_address, pfn);
|
|
}
|
|
|
|
/* Special handling for the case of faulting in 2d tiled buffers */
|
|
static int fault_2d(struct drm_gem_object *obj,
|
|
struct vm_area_struct *vma, struct vm_fault *vmf)
|
|
{
|
|
struct omap_gem_object *omap_obj = to_omap_bo(obj);
|
|
struct usergart_entry *entry;
|
|
enum tiler_fmt fmt = gem2fmt(omap_obj->flags);
|
|
struct page *pages[64]; /* XXX is this too much to have on stack? */
|
|
unsigned long pfn;
|
|
pgoff_t pgoff, base_pgoff;
|
|
void __user *vaddr;
|
|
int i, ret, slots;
|
|
|
|
/*
|
|
* Note the height of the slot is also equal to the number of pages
|
|
* that need to be mapped in to fill 4kb wide CPU page. If the slot
|
|
* height is 64, then 64 pages fill a 4kb wide by 64 row region.
|
|
*/
|
|
const int n = usergart[fmt].height;
|
|
const int n_shift = usergart[fmt].height_shift;
|
|
|
|
/*
|
|
* If buffer width in bytes > PAGE_SIZE then the virtual stride is
|
|
* rounded up to next multiple of PAGE_SIZE.. this need to be taken
|
|
* into account in some of the math, so figure out virtual stride
|
|
* in pages
|
|
*/
|
|
const int m = 1 + ((omap_obj->width << fmt) / PAGE_SIZE);
|
|
|
|
/* We don't use vmf->pgoff since that has the fake offset: */
|
|
pgoff = ((unsigned long)vmf->virtual_address -
|
|
vma->vm_start) >> PAGE_SHIFT;
|
|
|
|
/*
|
|
* Actual address we start mapping at is rounded down to previous slot
|
|
* boundary in the y direction:
|
|
*/
|
|
base_pgoff = round_down(pgoff, m << n_shift);
|
|
|
|
/* figure out buffer width in slots */
|
|
slots = omap_obj->width >> usergart[fmt].slot_shift;
|
|
|
|
vaddr = vmf->virtual_address - ((pgoff - base_pgoff) << PAGE_SHIFT);
|
|
|
|
entry = &usergart[fmt].entry[usergart[fmt].last];
|
|
|
|
/* evict previous buffer using this usergart entry, if any: */
|
|
if (entry->obj)
|
|
evict_entry(entry->obj, fmt, entry);
|
|
|
|
entry->obj = obj;
|
|
entry->obj_pgoff = base_pgoff;
|
|
|
|
/* now convert base_pgoff to phys offset from virt offset: */
|
|
base_pgoff = (base_pgoff >> n_shift) * slots;
|
|
|
|
/* for wider-than 4k.. figure out which part of the slot-row we want: */
|
|
if (m > 1) {
|
|
int off = pgoff % m;
|
|
entry->obj_pgoff += off;
|
|
base_pgoff /= m;
|
|
slots = min(slots - (off << n_shift), n);
|
|
base_pgoff += off << n_shift;
|
|
vaddr += off << PAGE_SHIFT;
|
|
}
|
|
|
|
/*
|
|
* Map in pages. Beyond the valid pixel part of the buffer, we set
|
|
* pages[i] to NULL to get a dummy page mapped in.. if someone
|
|
* reads/writes it they will get random/undefined content, but at
|
|
* least it won't be corrupting whatever other random page used to
|
|
* be mapped in, or other undefined behavior.
|
|
*/
|
|
memcpy(pages, &omap_obj->pages[base_pgoff],
|
|
sizeof(struct page *) * slots);
|
|
memset(pages + slots, 0,
|
|
sizeof(struct page *) * (n - slots));
|
|
|
|
ret = tiler_pin(entry->block, pages, ARRAY_SIZE(pages), 0, true);
|
|
if (ret) {
|
|
dev_err(obj->dev->dev, "failed to pin: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
pfn = entry->paddr >> PAGE_SHIFT;
|
|
|
|
VERB("Inserting %p pfn %lx, pa %lx", vmf->virtual_address,
|
|
pfn, pfn << PAGE_SHIFT);
|
|
|
|
for (i = n; i > 0; i--) {
|
|
vm_insert_mixed(vma, (unsigned long)vaddr, pfn);
|
|
pfn += usergart[fmt].stride_pfn;
|
|
vaddr += PAGE_SIZE * m;
|
|
}
|
|
|
|
/* simple round-robin: */
|
|
usergart[fmt].last = (usergart[fmt].last + 1) % NUM_USERGART_ENTRIES;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* omap_gem_fault - pagefault handler for GEM objects
|
|
* @vma: the VMA of the GEM object
|
|
* @vmf: fault detail
|
|
*
|
|
* Invoked when a fault occurs on an mmap of a GEM managed area. GEM
|
|
* does most of the work for us including the actual map/unmap calls
|
|
* but we need to do the actual page work.
|
|
*
|
|
* The VMA was set up by GEM. In doing so it also ensured that the
|
|
* vma->vm_private_data points to the GEM object that is backing this
|
|
* mapping.
|
|
*/
|
|
int omap_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
|
|
{
|
|
struct drm_gem_object *obj = vma->vm_private_data;
|
|
struct omap_gem_object *omap_obj = to_omap_bo(obj);
|
|
struct drm_device *dev = obj->dev;
|
|
struct page **pages;
|
|
int ret;
|
|
|
|
/* Make sure we don't parallel update on a fault, nor move or remove
|
|
* something from beneath our feet
|
|
*/
|
|
mutex_lock(&dev->struct_mutex);
|
|
|
|
/* if a shmem backed object, make sure we have pages attached now */
|
|
ret = get_pages(obj, &pages);
|
|
if (ret)
|
|
goto fail;
|
|
|
|
/* where should we do corresponding put_pages().. we are mapping
|
|
* the original page, rather than thru a GART, so we can't rely
|
|
* on eviction to trigger this. But munmap() or all mappings should
|
|
* probably trigger put_pages()?
|
|
*/
|
|
|
|
if (omap_obj->flags & OMAP_BO_TILED)
|
|
ret = fault_2d(obj, vma, vmf);
|
|
else
|
|
ret = fault_1d(obj, vma, vmf);
|
|
|
|
|
|
fail:
|
|
mutex_unlock(&dev->struct_mutex);
|
|
switch (ret) {
|
|
case 0:
|
|
case -ERESTARTSYS:
|
|
case -EINTR:
|
|
return VM_FAULT_NOPAGE;
|
|
case -ENOMEM:
|
|
return VM_FAULT_OOM;
|
|
default:
|
|
return VM_FAULT_SIGBUS;
|
|
}
|
|
}
|
|
|
|
/** We override mainly to fix up some of the vm mapping flags.. */
|
|
int omap_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 omap_gem_mmap_obj(vma->vm_private_data, vma);
|
|
}
|
|
|
|
int omap_gem_mmap_obj(struct drm_gem_object *obj,
|
|
struct vm_area_struct *vma)
|
|
{
|
|
struct omap_gem_object *omap_obj = to_omap_bo(obj);
|
|
|
|
vma->vm_flags &= ~VM_PFNMAP;
|
|
vma->vm_flags |= VM_MIXEDMAP;
|
|
|
|
if (omap_obj->flags & OMAP_BO_WC) {
|
|
vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags));
|
|
} else if (omap_obj->flags & OMAP_BO_UNCACHED) {
|
|
vma->vm_page_prot = pgprot_noncached(vm_get_page_prot(vma->vm_flags));
|
|
} else {
|
|
/*
|
|
* We do have some private objects, at least for scanout buffers
|
|
* on hardware without DMM/TILER. But these are allocated write-
|
|
* combine
|
|
*/
|
|
if (WARN_ON(!obj->filp))
|
|
return -EINVAL;
|
|
|
|
/*
|
|
* 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);
|
|
vma->vm_pgoff = 0;
|
|
vma->vm_file = get_file(obj->filp);
|
|
|
|
vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* omap_gem_dumb_create - create a dumb buffer
|
|
* @drm_file: our client file
|
|
* @dev: our device
|
|
* @args: the requested arguments copied from userspace
|
|
*
|
|
* Allocate a buffer suitable for use for a frame buffer of the
|
|
* form described by user space. Give userspace a handle by which
|
|
* to reference it.
|
|
*/
|
|
int omap_gem_dumb_create(struct drm_file *file, struct drm_device *dev,
|
|
struct drm_mode_create_dumb *args)
|
|
{
|
|
union omap_gem_size gsize;
|
|
|
|
/* in case someone tries to feed us a completely bogus stride: */
|
|
args->pitch = align_pitch(args->pitch, args->width, args->bpp);
|
|
args->size = PAGE_ALIGN(args->pitch * args->height);
|
|
|
|
gsize = (union omap_gem_size){
|
|
.bytes = args->size,
|
|
};
|
|
|
|
return omap_gem_new_handle(dev, file, gsize,
|
|
OMAP_BO_SCANOUT | OMAP_BO_WC, &args->handle);
|
|
}
|
|
|
|
/**
|
|
* omap_gem_dumb_destroy - destroy a dumb buffer
|
|
* @file: client file
|
|
* @dev: our DRM device
|
|
* @handle: the object handle
|
|
*
|
|
* Destroy a handle that was created via omap_gem_dumb_create.
|
|
*/
|
|
int omap_gem_dumb_destroy(struct drm_file *file, struct drm_device *dev,
|
|
uint32_t handle)
|
|
{
|
|
/* No special work needed, drop the reference and see what falls out */
|
|
return drm_gem_handle_delete(file, handle);
|
|
}
|
|
|
|
/**
|
|
* omap_gem_dumb_map - buffer mapping for dumb interface
|
|
* @file: our drm client file
|
|
* @dev: drm device
|
|
* @handle: GEM handle to the object (from dumb_create)
|
|
*
|
|
* Do the necessary setup to allow the mapping of the frame buffer
|
|
* into user memory. We don't have to do much here at the moment.
|
|
*/
|
|
int omap_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(dev, file, handle);
|
|
if (obj == NULL) {
|
|
ret = -ENOENT;
|
|
goto fail;
|
|
}
|
|
|
|
*offset = omap_gem_mmap_offset(obj);
|
|
|
|
drm_gem_object_unreference_unlocked(obj);
|
|
|
|
fail:
|
|
return ret;
|
|
}
|
|
|
|
/* Set scrolling position. This allows us to implement fast scrolling
|
|
* for console.
|
|
*
|
|
* Call only from non-atomic contexts.
|
|
*/
|
|
int omap_gem_roll(struct drm_gem_object *obj, uint32_t roll)
|
|
{
|
|
struct omap_gem_object *omap_obj = to_omap_bo(obj);
|
|
uint32_t npages = obj->size >> PAGE_SHIFT;
|
|
int ret = 0;
|
|
|
|
if (roll > npages) {
|
|
dev_err(obj->dev->dev, "invalid roll: %d\n", roll);
|
|
return -EINVAL;
|
|
}
|
|
|
|
omap_obj->roll = roll;
|
|
|
|
mutex_lock(&obj->dev->struct_mutex);
|
|
|
|
/* if we aren't mapped yet, we don't need to do anything */
|
|
if (omap_obj->block) {
|
|
struct page **pages;
|
|
ret = get_pages(obj, &pages);
|
|
if (ret)
|
|
goto fail;
|
|
ret = tiler_pin(omap_obj->block, pages, npages, roll, true);
|
|
if (ret)
|
|
dev_err(obj->dev->dev, "could not repin: %d\n", ret);
|
|
}
|
|
|
|
fail:
|
|
mutex_unlock(&obj->dev->struct_mutex);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Sync the buffer for CPU access.. note pages should already be
|
|
* attached, ie. omap_gem_get_pages()
|
|
*/
|
|
void omap_gem_cpu_sync(struct drm_gem_object *obj, int pgoff)
|
|
{
|
|
struct drm_device *dev = obj->dev;
|
|
struct omap_gem_object *omap_obj = to_omap_bo(obj);
|
|
|
|
if (is_cached_coherent(obj) && omap_obj->addrs[pgoff]) {
|
|
dma_unmap_page(dev->dev, omap_obj->addrs[pgoff],
|
|
PAGE_SIZE, DMA_BIDIRECTIONAL);
|
|
omap_obj->addrs[pgoff] = 0;
|
|
}
|
|
}
|
|
|
|
/* sync the buffer for DMA access */
|
|
void omap_gem_dma_sync(struct drm_gem_object *obj,
|
|
enum dma_data_direction dir)
|
|
{
|
|
struct drm_device *dev = obj->dev;
|
|
struct omap_gem_object *omap_obj = to_omap_bo(obj);
|
|
|
|
if (is_cached_coherent(obj)) {
|
|
int i, npages = obj->size >> PAGE_SHIFT;
|
|
struct page **pages = omap_obj->pages;
|
|
bool dirty = false;
|
|
|
|
for (i = 0; i < npages; i++) {
|
|
if (!omap_obj->addrs[i]) {
|
|
omap_obj->addrs[i] = dma_map_page(dev->dev, pages[i], 0,
|
|
PAGE_SIZE, DMA_BIDIRECTIONAL);
|
|
dirty = true;
|
|
}
|
|
}
|
|
|
|
if (dirty) {
|
|
unmap_mapping_range(obj->filp->f_mapping, 0,
|
|
omap_gem_mmap_size(obj), 1);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Get physical address for DMA.. if 'remap' is true, and the buffer is not
|
|
* already contiguous, remap it to pin in physically contiguous memory.. (ie.
|
|
* map in TILER)
|
|
*/
|
|
int omap_gem_get_paddr(struct drm_gem_object *obj,
|
|
dma_addr_t *paddr, bool remap)
|
|
{
|
|
struct omap_drm_private *priv = obj->dev->dev_private;
|
|
struct omap_gem_object *omap_obj = to_omap_bo(obj);
|
|
int ret = 0;
|
|
|
|
mutex_lock(&obj->dev->struct_mutex);
|
|
|
|
if (remap && is_shmem(obj) && priv->has_dmm) {
|
|
if (omap_obj->paddr_cnt == 0) {
|
|
struct page **pages;
|
|
uint32_t npages = obj->size >> PAGE_SHIFT;
|
|
enum tiler_fmt fmt = gem2fmt(omap_obj->flags);
|
|
struct tiler_block *block;
|
|
|
|
BUG_ON(omap_obj->block);
|
|
|
|
ret = get_pages(obj, &pages);
|
|
if (ret)
|
|
goto fail;
|
|
|
|
if (omap_obj->flags & OMAP_BO_TILED) {
|
|
block = tiler_reserve_2d(fmt,
|
|
omap_obj->width,
|
|
omap_obj->height, 0);
|
|
} else {
|
|
block = tiler_reserve_1d(obj->size);
|
|
}
|
|
|
|
if (IS_ERR(block)) {
|
|
ret = PTR_ERR(block);
|
|
dev_err(obj->dev->dev,
|
|
"could not remap: %d (%d)\n", ret, fmt);
|
|
goto fail;
|
|
}
|
|
|
|
/* TODO: enable async refill.. */
|
|
ret = tiler_pin(block, pages, npages,
|
|
omap_obj->roll, true);
|
|
if (ret) {
|
|
tiler_release(block);
|
|
dev_err(obj->dev->dev,
|
|
"could not pin: %d\n", ret);
|
|
goto fail;
|
|
}
|
|
|
|
omap_obj->paddr = tiler_ssptr(block);
|
|
omap_obj->block = block;
|
|
|
|
DBG("got paddr: %08x", omap_obj->paddr);
|
|
}
|
|
|
|
omap_obj->paddr_cnt++;
|
|
|
|
*paddr = omap_obj->paddr;
|
|
} else if (omap_obj->flags & OMAP_BO_DMA) {
|
|
*paddr = omap_obj->paddr;
|
|
} else {
|
|
ret = -EINVAL;
|
|
goto fail;
|
|
}
|
|
|
|
fail:
|
|
mutex_unlock(&obj->dev->struct_mutex);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Release physical address, when DMA is no longer being performed.. this
|
|
* could potentially unpin and unmap buffers from TILER
|
|
*/
|
|
int omap_gem_put_paddr(struct drm_gem_object *obj)
|
|
{
|
|
struct omap_gem_object *omap_obj = to_omap_bo(obj);
|
|
int ret = 0;
|
|
|
|
mutex_lock(&obj->dev->struct_mutex);
|
|
if (omap_obj->paddr_cnt > 0) {
|
|
omap_obj->paddr_cnt--;
|
|
if (omap_obj->paddr_cnt == 0) {
|
|
ret = tiler_unpin(omap_obj->block);
|
|
if (ret) {
|
|
dev_err(obj->dev->dev,
|
|
"could not unpin pages: %d\n", ret);
|
|
goto fail;
|
|
}
|
|
ret = tiler_release(omap_obj->block);
|
|
if (ret) {
|
|
dev_err(obj->dev->dev,
|
|
"could not release unmap: %d\n", ret);
|
|
}
|
|
omap_obj->block = NULL;
|
|
}
|
|
}
|
|
fail:
|
|
mutex_unlock(&obj->dev->struct_mutex);
|
|
return ret;
|
|
}
|
|
|
|
/* Get rotated scanout address (only valid if already pinned), at the
|
|
* specified orientation and x,y offset from top-left corner of buffer
|
|
* (only valid for tiled 2d buffers)
|
|
*/
|
|
int omap_gem_rotated_paddr(struct drm_gem_object *obj, uint32_t orient,
|
|
int x, int y, dma_addr_t *paddr)
|
|
{
|
|
struct omap_gem_object *omap_obj = to_omap_bo(obj);
|
|
int ret = -EINVAL;
|
|
|
|
mutex_lock(&obj->dev->struct_mutex);
|
|
if ((omap_obj->paddr_cnt > 0) && omap_obj->block &&
|
|
(omap_obj->flags & OMAP_BO_TILED)) {
|
|
*paddr = tiler_tsptr(omap_obj->block, orient, x, y);
|
|
ret = 0;
|
|
}
|
|
mutex_unlock(&obj->dev->struct_mutex);
|
|
return ret;
|
|
}
|
|
|
|
/* Get tiler stride for the buffer (only valid for 2d tiled buffers) */
|
|
int omap_gem_tiled_stride(struct drm_gem_object *obj, uint32_t orient)
|
|
{
|
|
struct omap_gem_object *omap_obj = to_omap_bo(obj);
|
|
int ret = -EINVAL;
|
|
if (omap_obj->flags & OMAP_BO_TILED)
|
|
ret = tiler_stride(gem2fmt(omap_obj->flags), orient);
|
|
return ret;
|
|
}
|
|
|
|
/* acquire pages when needed (for example, for DMA where physically
|
|
* contiguous buffer is not required
|
|
*/
|
|
static int get_pages(struct drm_gem_object *obj, struct page ***pages)
|
|
{
|
|
struct omap_gem_object *omap_obj = to_omap_bo(obj);
|
|
int ret = 0;
|
|
|
|
if (is_shmem(obj) && !omap_obj->pages) {
|
|
ret = omap_gem_attach_pages(obj);
|
|
if (ret) {
|
|
dev_err(obj->dev->dev, "could not attach pages\n");
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
/* TODO: even phys-contig.. we should have a list of pages? */
|
|
*pages = omap_obj->pages;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* if !remap, and we don't have pages backing, then fail, rather than
|
|
* increasing the pin count (which we don't really do yet anyways,
|
|
* because we don't support swapping pages back out). And 'remap'
|
|
* might not be quite the right name, but I wanted to keep it working
|
|
* similarly to omap_gem_get_paddr(). Note though that mutex is not
|
|
* aquired if !remap (because this can be called in atomic ctxt),
|
|
* but probably omap_gem_get_paddr() should be changed to work in the
|
|
* same way. If !remap, a matching omap_gem_put_pages() call is not
|
|
* required (and should not be made).
|
|
*/
|
|
int omap_gem_get_pages(struct drm_gem_object *obj, struct page ***pages,
|
|
bool remap)
|
|
{
|
|
int ret;
|
|
if (!remap) {
|
|
struct omap_gem_object *omap_obj = to_omap_bo(obj);
|
|
if (!omap_obj->pages)
|
|
return -ENOMEM;
|
|
*pages = omap_obj->pages;
|
|
return 0;
|
|
}
|
|
mutex_lock(&obj->dev->struct_mutex);
|
|
ret = get_pages(obj, pages);
|
|
mutex_unlock(&obj->dev->struct_mutex);
|
|
return ret;
|
|
}
|
|
|
|
/* release pages when DMA no longer being performed */
|
|
int omap_gem_put_pages(struct drm_gem_object *obj)
|
|
{
|
|
/* do something here if we dynamically attach/detach pages.. at
|
|
* least they would no longer need to be pinned if everyone has
|
|
* released the pages..
|
|
*/
|
|
return 0;
|
|
}
|
|
|
|
/* Get kernel virtual address for CPU access.. this more or less only
|
|
* exists for omap_fbdev. This should be called with struct_mutex
|
|
* held.
|
|
*/
|
|
void *omap_gem_vaddr(struct drm_gem_object *obj)
|
|
{
|
|
struct omap_gem_object *omap_obj = to_omap_bo(obj);
|
|
WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex));
|
|
if (!omap_obj->vaddr) {
|
|
struct page **pages;
|
|
int ret = get_pages(obj, &pages);
|
|
if (ret)
|
|
return ERR_PTR(ret);
|
|
omap_obj->vaddr = vmap(pages, obj->size >> PAGE_SHIFT,
|
|
VM_MAP, pgprot_writecombine(PAGE_KERNEL));
|
|
}
|
|
return omap_obj->vaddr;
|
|
}
|
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
void omap_gem_describe(struct drm_gem_object *obj, struct seq_file *m)
|
|
{
|
|
struct drm_device *dev = obj->dev;
|
|
struct omap_gem_object *omap_obj = to_omap_bo(obj);
|
|
uint64_t off = 0;
|
|
|
|
WARN_ON(!mutex_is_locked(&dev->struct_mutex));
|
|
|
|
if (obj->map_list.map)
|
|
off = (uint64_t)obj->map_list.hash.key;
|
|
|
|
seq_printf(m, "%08x: %2d (%2d) %08llx %08Zx (%2d) %p %4d",
|
|
omap_obj->flags, obj->name, obj->refcount.refcount.counter,
|
|
off, omap_obj->paddr, omap_obj->paddr_cnt,
|
|
omap_obj->vaddr, omap_obj->roll);
|
|
|
|
if (omap_obj->flags & OMAP_BO_TILED) {
|
|
seq_printf(m, " %dx%d", omap_obj->width, omap_obj->height);
|
|
if (omap_obj->block) {
|
|
struct tcm_area *area = &omap_obj->block->area;
|
|
seq_printf(m, " (%dx%d, %dx%d)",
|
|
area->p0.x, area->p0.y,
|
|
area->p1.x, area->p1.y);
|
|
}
|
|
} else {
|
|
seq_printf(m, " %d", obj->size);
|
|
}
|
|
|
|
seq_printf(m, "\n");
|
|
}
|
|
|
|
void omap_gem_describe_objects(struct list_head *list, struct seq_file *m)
|
|
{
|
|
struct omap_gem_object *omap_obj;
|
|
int count = 0;
|
|
size_t size = 0;
|
|
|
|
list_for_each_entry(omap_obj, list, mm_list) {
|
|
struct drm_gem_object *obj = &omap_obj->base;
|
|
seq_printf(m, " ");
|
|
omap_gem_describe(obj, m);
|
|
count++;
|
|
size += obj->size;
|
|
}
|
|
|
|
seq_printf(m, "Total %d objects, %zu bytes\n", count, size);
|
|
}
|
|
#endif
|
|
|
|
/* Buffer Synchronization:
|
|
*/
|
|
|
|
struct omap_gem_sync_waiter {
|
|
struct list_head list;
|
|
struct omap_gem_object *omap_obj;
|
|
enum omap_gem_op op;
|
|
uint32_t read_target, write_target;
|
|
/* notify called w/ sync_lock held */
|
|
void (*notify)(void *arg);
|
|
void *arg;
|
|
};
|
|
|
|
/* list of omap_gem_sync_waiter.. the notify fxn gets called back when
|
|
* the read and/or write target count is achieved which can call a user
|
|
* callback (ex. to kick 3d and/or 2d), wakeup blocked task (prep for
|
|
* cpu access), etc.
|
|
*/
|
|
static LIST_HEAD(waiters);
|
|
|
|
static inline bool is_waiting(struct omap_gem_sync_waiter *waiter)
|
|
{
|
|
struct omap_gem_object *omap_obj = waiter->omap_obj;
|
|
if ((waiter->op & OMAP_GEM_READ) &&
|
|
(omap_obj->sync->read_complete < waiter->read_target))
|
|
return true;
|
|
if ((waiter->op & OMAP_GEM_WRITE) &&
|
|
(omap_obj->sync->write_complete < waiter->write_target))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
/* macro for sync debug.. */
|
|
#define SYNCDBG 0
|
|
#define SYNC(fmt, ...) do { if (SYNCDBG) \
|
|
printk(KERN_ERR "%s:%d: "fmt"\n", \
|
|
__func__, __LINE__, ##__VA_ARGS__); \
|
|
} while (0)
|
|
|
|
|
|
static void sync_op_update(void)
|
|
{
|
|
struct omap_gem_sync_waiter *waiter, *n;
|
|
list_for_each_entry_safe(waiter, n, &waiters, list) {
|
|
if (!is_waiting(waiter)) {
|
|
list_del(&waiter->list);
|
|
SYNC("notify: %p", waiter);
|
|
waiter->notify(waiter->arg);
|
|
kfree(waiter);
|
|
}
|
|
}
|
|
}
|
|
|
|
static inline int sync_op(struct drm_gem_object *obj,
|
|
enum omap_gem_op op, bool start)
|
|
{
|
|
struct omap_gem_object *omap_obj = to_omap_bo(obj);
|
|
int ret = 0;
|
|
|
|
spin_lock(&sync_lock);
|
|
|
|
if (!omap_obj->sync) {
|
|
omap_obj->sync = kzalloc(sizeof(*omap_obj->sync), GFP_ATOMIC);
|
|
if (!omap_obj->sync) {
|
|
ret = -ENOMEM;
|
|
goto unlock;
|
|
}
|
|
}
|
|
|
|
if (start) {
|
|
if (op & OMAP_GEM_READ)
|
|
omap_obj->sync->read_pending++;
|
|
if (op & OMAP_GEM_WRITE)
|
|
omap_obj->sync->write_pending++;
|
|
} else {
|
|
if (op & OMAP_GEM_READ)
|
|
omap_obj->sync->read_complete++;
|
|
if (op & OMAP_GEM_WRITE)
|
|
omap_obj->sync->write_complete++;
|
|
sync_op_update();
|
|
}
|
|
|
|
unlock:
|
|
spin_unlock(&sync_lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* it is a bit lame to handle updates in this sort of polling way, but
|
|
* in case of PVR, the GPU can directly update read/write complete
|
|
* values, and not really tell us which ones it updated.. this also
|
|
* means that sync_lock is not quite sufficient. So we'll need to
|
|
* do something a bit better when it comes time to add support for
|
|
* separate 2d hw..
|
|
*/
|
|
void omap_gem_op_update(void)
|
|
{
|
|
spin_lock(&sync_lock);
|
|
sync_op_update();
|
|
spin_unlock(&sync_lock);
|
|
}
|
|
|
|
/* mark the start of read and/or write operation */
|
|
int omap_gem_op_start(struct drm_gem_object *obj, enum omap_gem_op op)
|
|
{
|
|
return sync_op(obj, op, true);
|
|
}
|
|
|
|
int omap_gem_op_finish(struct drm_gem_object *obj, enum omap_gem_op op)
|
|
{
|
|
return sync_op(obj, op, false);
|
|
}
|
|
|
|
static DECLARE_WAIT_QUEUE_HEAD(sync_event);
|
|
|
|
static void sync_notify(void *arg)
|
|
{
|
|
struct task_struct **waiter_task = arg;
|
|
*waiter_task = NULL;
|
|
wake_up_all(&sync_event);
|
|
}
|
|
|
|
int omap_gem_op_sync(struct drm_gem_object *obj, enum omap_gem_op op)
|
|
{
|
|
struct omap_gem_object *omap_obj = to_omap_bo(obj);
|
|
int ret = 0;
|
|
if (omap_obj->sync) {
|
|
struct task_struct *waiter_task = current;
|
|
struct omap_gem_sync_waiter *waiter =
|
|
kzalloc(sizeof(*waiter), GFP_KERNEL);
|
|
|
|
if (!waiter)
|
|
return -ENOMEM;
|
|
|
|
waiter->omap_obj = omap_obj;
|
|
waiter->op = op;
|
|
waiter->read_target = omap_obj->sync->read_pending;
|
|
waiter->write_target = omap_obj->sync->write_pending;
|
|
waiter->notify = sync_notify;
|
|
waiter->arg = &waiter_task;
|
|
|
|
spin_lock(&sync_lock);
|
|
if (is_waiting(waiter)) {
|
|
SYNC("waited: %p", waiter);
|
|
list_add_tail(&waiter->list, &waiters);
|
|
spin_unlock(&sync_lock);
|
|
ret = wait_event_interruptible(sync_event,
|
|
(waiter_task == NULL));
|
|
spin_lock(&sync_lock);
|
|
if (waiter_task) {
|
|
SYNC("interrupted: %p", waiter);
|
|
/* we were interrupted */
|
|
list_del(&waiter->list);
|
|
waiter_task = NULL;
|
|
} else {
|
|
/* freed in sync_op_update() */
|
|
waiter = NULL;
|
|
}
|
|
}
|
|
spin_unlock(&sync_lock);
|
|
|
|
if (waiter)
|
|
kfree(waiter);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/* call fxn(arg), either synchronously or asynchronously if the op
|
|
* is currently blocked.. fxn() can be called from any context
|
|
*
|
|
* (TODO for now fxn is called back from whichever context calls
|
|
* omap_gem_op_update().. but this could be better defined later
|
|
* if needed)
|
|
*
|
|
* TODO more code in common w/ _sync()..
|
|
*/
|
|
int omap_gem_op_async(struct drm_gem_object *obj, enum omap_gem_op op,
|
|
void (*fxn)(void *arg), void *arg)
|
|
{
|
|
struct omap_gem_object *omap_obj = to_omap_bo(obj);
|
|
if (omap_obj->sync) {
|
|
struct omap_gem_sync_waiter *waiter =
|
|
kzalloc(sizeof(*waiter), GFP_ATOMIC);
|
|
|
|
if (!waiter)
|
|
return -ENOMEM;
|
|
|
|
waiter->omap_obj = omap_obj;
|
|
waiter->op = op;
|
|
waiter->read_target = omap_obj->sync->read_pending;
|
|
waiter->write_target = omap_obj->sync->write_pending;
|
|
waiter->notify = fxn;
|
|
waiter->arg = arg;
|
|
|
|
spin_lock(&sync_lock);
|
|
if (is_waiting(waiter)) {
|
|
SYNC("waited: %p", waiter);
|
|
list_add_tail(&waiter->list, &waiters);
|
|
spin_unlock(&sync_lock);
|
|
return 0;
|
|
}
|
|
|
|
spin_unlock(&sync_lock);
|
|
}
|
|
|
|
/* no waiting.. */
|
|
fxn(arg);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* special API so PVR can update the buffer to use a sync-object allocated
|
|
* from it's sync-obj heap. Only used for a newly allocated (from PVR's
|
|
* perspective) sync-object, so we overwrite the new syncobj w/ values
|
|
* from the already allocated syncobj (if there is one)
|
|
*/
|
|
int omap_gem_set_sync_object(struct drm_gem_object *obj, void *syncobj)
|
|
{
|
|
struct omap_gem_object *omap_obj = to_omap_bo(obj);
|
|
int ret = 0;
|
|
|
|
spin_lock(&sync_lock);
|
|
|
|
if ((omap_obj->flags & OMAP_BO_EXT_SYNC) && !syncobj) {
|
|
/* clearing a previously set syncobj */
|
|
syncobj = kzalloc(sizeof(*omap_obj->sync), GFP_ATOMIC);
|
|
if (!syncobj) {
|
|
ret = -ENOMEM;
|
|
goto unlock;
|
|
}
|
|
memcpy(syncobj, omap_obj->sync, sizeof(*omap_obj->sync));
|
|
omap_obj->flags &= ~OMAP_BO_EXT_SYNC;
|
|
omap_obj->sync = syncobj;
|
|
} else if (syncobj && !(omap_obj->flags & OMAP_BO_EXT_SYNC)) {
|
|
/* replacing an existing syncobj */
|
|
if (omap_obj->sync) {
|
|
memcpy(syncobj, omap_obj->sync, sizeof(*omap_obj->sync));
|
|
kfree(omap_obj->sync);
|
|
}
|
|
omap_obj->flags |= OMAP_BO_EXT_SYNC;
|
|
omap_obj->sync = syncobj;
|
|
}
|
|
|
|
unlock:
|
|
spin_unlock(&sync_lock);
|
|
return ret;
|
|
}
|
|
|
|
int omap_gem_init_object(struct drm_gem_object *obj)
|
|
{
|
|
return -EINVAL; /* unused */
|
|
}
|
|
|
|
/* don't call directly.. called from GEM core when it is time to actually
|
|
* free the object..
|
|
*/
|
|
void omap_gem_free_object(struct drm_gem_object *obj)
|
|
{
|
|
struct drm_device *dev = obj->dev;
|
|
struct omap_gem_object *omap_obj = to_omap_bo(obj);
|
|
|
|
evict(obj);
|
|
|
|
WARN_ON(!mutex_is_locked(&dev->struct_mutex));
|
|
|
|
list_del(&omap_obj->mm_list);
|
|
|
|
if (obj->map_list.map)
|
|
drm_gem_free_mmap_offset(obj);
|
|
|
|
/* this means the object is still pinned.. which really should
|
|
* not happen. I think..
|
|
*/
|
|
WARN_ON(omap_obj->paddr_cnt > 0);
|
|
|
|
/* don't free externally allocated backing memory */
|
|
if (!(omap_obj->flags & OMAP_BO_EXT_MEM)) {
|
|
if (omap_obj->pages)
|
|
omap_gem_detach_pages(obj);
|
|
|
|
if (!is_shmem(obj)) {
|
|
dma_free_writecombine(dev->dev, obj->size,
|
|
omap_obj->vaddr, omap_obj->paddr);
|
|
} else if (omap_obj->vaddr) {
|
|
vunmap(omap_obj->vaddr);
|
|
}
|
|
}
|
|
|
|
/* don't free externally allocated syncobj */
|
|
if (!(omap_obj->flags & OMAP_BO_EXT_SYNC))
|
|
kfree(omap_obj->sync);
|
|
|
|
drm_gem_object_release(obj);
|
|
|
|
kfree(obj);
|
|
}
|
|
|
|
/* convenience method to construct a GEM buffer object, and userspace handle */
|
|
int omap_gem_new_handle(struct drm_device *dev, struct drm_file *file,
|
|
union omap_gem_size gsize, uint32_t flags, uint32_t *handle)
|
|
{
|
|
struct drm_gem_object *obj;
|
|
int ret;
|
|
|
|
obj = omap_gem_new(dev, gsize, flags);
|
|
if (!obj)
|
|
return -ENOMEM;
|
|
|
|
ret = drm_gem_handle_create(file, obj, handle);
|
|
if (ret) {
|
|
drm_gem_object_release(obj);
|
|
kfree(obj); /* TODO isn't there a dtor to call? just copying i915 */
|
|
return ret;
|
|
}
|
|
|
|
/* drop reference from allocate - handle holds it now */
|
|
drm_gem_object_unreference_unlocked(obj);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* GEM buffer object constructor */
|
|
struct drm_gem_object *omap_gem_new(struct drm_device *dev,
|
|
union omap_gem_size gsize, uint32_t flags)
|
|
{
|
|
struct omap_drm_private *priv = dev->dev_private;
|
|
struct omap_gem_object *omap_obj;
|
|
struct drm_gem_object *obj = NULL;
|
|
size_t size;
|
|
int ret;
|
|
|
|
if (flags & OMAP_BO_TILED) {
|
|
if (!usergart) {
|
|
dev_err(dev->dev, "Tiled buffers require DMM\n");
|
|
goto fail;
|
|
}
|
|
|
|
/* tiled buffers are always shmem paged backed.. when they are
|
|
* scanned out, they are remapped into DMM/TILER
|
|
*/
|
|
flags &= ~OMAP_BO_SCANOUT;
|
|
|
|
/* currently don't allow cached buffers.. there is some caching
|
|
* stuff that needs to be handled better
|
|
*/
|
|
flags &= ~(OMAP_BO_CACHED|OMAP_BO_UNCACHED);
|
|
flags |= OMAP_BO_WC;
|
|
|
|
/* align dimensions to slot boundaries... */
|
|
tiler_align(gem2fmt(flags),
|
|
&gsize.tiled.width, &gsize.tiled.height);
|
|
|
|
/* ...and calculate size based on aligned dimensions */
|
|
size = tiler_size(gem2fmt(flags),
|
|
gsize.tiled.width, gsize.tiled.height);
|
|
} else {
|
|
size = PAGE_ALIGN(gsize.bytes);
|
|
}
|
|
|
|
omap_obj = kzalloc(sizeof(*omap_obj), GFP_KERNEL);
|
|
if (!omap_obj) {
|
|
dev_err(dev->dev, "could not allocate GEM object\n");
|
|
goto fail;
|
|
}
|
|
|
|
list_add(&omap_obj->mm_list, &priv->obj_list);
|
|
|
|
obj = &omap_obj->base;
|
|
|
|
if ((flags & OMAP_BO_SCANOUT) && !priv->has_dmm) {
|
|
/* attempt to allocate contiguous memory if we don't
|
|
* have DMM for remappign discontiguous buffers
|
|
*/
|
|
omap_obj->vaddr = dma_alloc_writecombine(dev->dev, size,
|
|
&omap_obj->paddr, GFP_KERNEL);
|
|
if (omap_obj->vaddr)
|
|
flags |= OMAP_BO_DMA;
|
|
|
|
}
|
|
|
|
omap_obj->flags = flags;
|
|
|
|
if (flags & OMAP_BO_TILED) {
|
|
omap_obj->width = gsize.tiled.width;
|
|
omap_obj->height = gsize.tiled.height;
|
|
}
|
|
|
|
if (flags & (OMAP_BO_DMA|OMAP_BO_EXT_MEM))
|
|
ret = drm_gem_private_object_init(dev, obj, size);
|
|
else
|
|
ret = drm_gem_object_init(dev, obj, size);
|
|
|
|
if (ret)
|
|
goto fail;
|
|
|
|
return obj;
|
|
|
|
fail:
|
|
if (obj)
|
|
omap_gem_free_object(obj);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* init/cleanup.. if DMM is used, we need to set some stuff up.. */
|
|
void omap_gem_init(struct drm_device *dev)
|
|
{
|
|
struct omap_drm_private *priv = dev->dev_private;
|
|
const enum tiler_fmt fmts[] = {
|
|
TILFMT_8BIT, TILFMT_16BIT, TILFMT_32BIT
|
|
};
|
|
int i, j;
|
|
|
|
if (!dmm_is_available()) {
|
|
/* DMM only supported on OMAP4 and later, so this isn't fatal */
|
|
dev_warn(dev->dev, "DMM not available, disable DMM support\n");
|
|
return;
|
|
}
|
|
|
|
usergart = kzalloc(3 * sizeof(*usergart), GFP_KERNEL);
|
|
if (!usergart) {
|
|
dev_warn(dev->dev, "could not allocate usergart\n");
|
|
return;
|
|
}
|
|
|
|
/* reserve 4k aligned/wide regions for userspace mappings: */
|
|
for (i = 0; i < ARRAY_SIZE(fmts); i++) {
|
|
uint16_t h = 1, w = PAGE_SIZE >> i;
|
|
tiler_align(fmts[i], &w, &h);
|
|
/* note: since each region is 1 4kb page wide, and minimum
|
|
* number of rows, the height ends up being the same as the
|
|
* # of pages in the region
|
|
*/
|
|
usergart[i].height = h;
|
|
usergart[i].height_shift = ilog2(h);
|
|
usergart[i].stride_pfn = tiler_stride(fmts[i], 0) >> PAGE_SHIFT;
|
|
usergart[i].slot_shift = ilog2((PAGE_SIZE / h) >> i);
|
|
for (j = 0; j < NUM_USERGART_ENTRIES; j++) {
|
|
struct usergart_entry *entry = &usergart[i].entry[j];
|
|
struct tiler_block *block =
|
|
tiler_reserve_2d(fmts[i], w, h,
|
|
PAGE_SIZE);
|
|
if (IS_ERR(block)) {
|
|
dev_err(dev->dev,
|
|
"reserve failed: %d, %d, %ld\n",
|
|
i, j, PTR_ERR(block));
|
|
return;
|
|
}
|
|
entry->paddr = tiler_ssptr(block);
|
|
entry->block = block;
|
|
|
|
DBG("%d:%d: %dx%d: paddr=%08x stride=%d", i, j, w, h,
|
|
entry->paddr,
|
|
usergart[i].stride_pfn << PAGE_SHIFT);
|
|
}
|
|
}
|
|
|
|
priv->has_dmm = true;
|
|
}
|
|
|
|
void omap_gem_deinit(struct drm_device *dev)
|
|
{
|
|
/* I believe we can rely on there being no more outstanding GEM
|
|
* objects which could depend on usergart/dmm at this point.
|
|
*/
|
|
kfree(usergart);
|
|
}
|