linux_dsm_epyc7002/drivers/gpu/drm/ttm/ttm_bo_util.c

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/**************************************************************************
*
* Copyright (c) 2007-2009 VMware, Inc., Palo Alto, CA., USA
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
* USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
/*
* Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
*/
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_placement.h>
#include <drm/drm_vma_manager.h>
#include <linux/io.h>
#include <linux/highmem.h>
#include <linux/wait.h>
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 15:04:11 +07:00
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/module.h>
void ttm_bo_free_old_node(struct ttm_buffer_object *bo)
{
ttm_bo_mem_put(bo, &bo->mem);
}
int ttm_bo_move_ttm(struct ttm_buffer_object *bo,
bool evict,
bool no_wait_gpu, struct ttm_mem_reg *new_mem)
{
struct ttm_tt *ttm = bo->ttm;
struct ttm_mem_reg *old_mem = &bo->mem;
int ret;
if (old_mem->mem_type != TTM_PL_SYSTEM) {
ttm_tt_unbind(ttm);
ttm_bo_free_old_node(bo);
ttm_flag_masked(&old_mem->placement, TTM_PL_FLAG_SYSTEM,
TTM_PL_MASK_MEM);
old_mem->mem_type = TTM_PL_SYSTEM;
}
ret = ttm_tt_set_placement_caching(ttm, new_mem->placement);
if (unlikely(ret != 0))
return ret;
if (new_mem->mem_type != TTM_PL_SYSTEM) {
ret = ttm_tt_bind(ttm, new_mem);
if (unlikely(ret != 0))
return ret;
}
*old_mem = *new_mem;
new_mem->mm_node = NULL;
return 0;
}
EXPORT_SYMBOL(ttm_bo_move_ttm);
int ttm_mem_io_lock(struct ttm_mem_type_manager *man, bool interruptible)
{
if (likely(man->io_reserve_fastpath))
return 0;
if (interruptible)
return mutex_lock_interruptible(&man->io_reserve_mutex);
mutex_lock(&man->io_reserve_mutex);
return 0;
}
EXPORT_SYMBOL(ttm_mem_io_lock);
void ttm_mem_io_unlock(struct ttm_mem_type_manager *man)
{
if (likely(man->io_reserve_fastpath))
return;
mutex_unlock(&man->io_reserve_mutex);
}
EXPORT_SYMBOL(ttm_mem_io_unlock);
static int ttm_mem_io_evict(struct ttm_mem_type_manager *man)
{
struct ttm_buffer_object *bo;
if (!man->use_io_reserve_lru || list_empty(&man->io_reserve_lru))
return -EAGAIN;
bo = list_first_entry(&man->io_reserve_lru,
struct ttm_buffer_object,
io_reserve_lru);
list_del_init(&bo->io_reserve_lru);
ttm_bo_unmap_virtual_locked(bo);
return 0;
}
int ttm_mem_io_reserve(struct ttm_bo_device *bdev,
struct ttm_mem_reg *mem)
{
struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
int ret = 0;
if (!bdev->driver->io_mem_reserve)
return 0;
if (likely(man->io_reserve_fastpath))
return bdev->driver->io_mem_reserve(bdev, mem);
if (bdev->driver->io_mem_reserve &&
mem->bus.io_reserved_count++ == 0) {
retry:
ret = bdev->driver->io_mem_reserve(bdev, mem);
if (ret == -EAGAIN) {
ret = ttm_mem_io_evict(man);
if (ret == 0)
goto retry;
}
}
return ret;
}
EXPORT_SYMBOL(ttm_mem_io_reserve);
void ttm_mem_io_free(struct ttm_bo_device *bdev,
struct ttm_mem_reg *mem)
{
struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
if (likely(man->io_reserve_fastpath))
return;
if (bdev->driver->io_mem_reserve &&
--mem->bus.io_reserved_count == 0 &&
bdev->driver->io_mem_free)
bdev->driver->io_mem_free(bdev, mem);
}
EXPORT_SYMBOL(ttm_mem_io_free);
int ttm_mem_io_reserve_vm(struct ttm_buffer_object *bo)
{
struct ttm_mem_reg *mem = &bo->mem;
int ret;
if (!mem->bus.io_reserved_vm) {
struct ttm_mem_type_manager *man =
&bo->bdev->man[mem->mem_type];
ret = ttm_mem_io_reserve(bo->bdev, mem);
if (unlikely(ret != 0))
return ret;
mem->bus.io_reserved_vm = true;
if (man->use_io_reserve_lru)
list_add_tail(&bo->io_reserve_lru,
&man->io_reserve_lru);
}
return 0;
}
void ttm_mem_io_free_vm(struct ttm_buffer_object *bo)
{
struct ttm_mem_reg *mem = &bo->mem;
if (mem->bus.io_reserved_vm) {
mem->bus.io_reserved_vm = false;
list_del_init(&bo->io_reserve_lru);
ttm_mem_io_free(bo->bdev, mem);
}
}
static int ttm_mem_reg_ioremap(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem,
void **virtual)
{
struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
int ret;
void *addr;
*virtual = NULL;
(void) ttm_mem_io_lock(man, false);
ret = ttm_mem_io_reserve(bdev, mem);
ttm_mem_io_unlock(man);
if (ret || !mem->bus.is_iomem)
return ret;
if (mem->bus.addr) {
addr = mem->bus.addr;
} else {
if (mem->placement & TTM_PL_FLAG_WC)
addr = ioremap_wc(mem->bus.base + mem->bus.offset, mem->bus.size);
else
addr = ioremap_nocache(mem->bus.base + mem->bus.offset, mem->bus.size);
if (!addr) {
(void) ttm_mem_io_lock(man, false);
ttm_mem_io_free(bdev, mem);
ttm_mem_io_unlock(man);
return -ENOMEM;
}
}
*virtual = addr;
return 0;
}
static void ttm_mem_reg_iounmap(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem,
void *virtual)
{
struct ttm_mem_type_manager *man;
man = &bdev->man[mem->mem_type];
if (virtual && mem->bus.addr == NULL)
iounmap(virtual);
(void) ttm_mem_io_lock(man, false);
ttm_mem_io_free(bdev, mem);
ttm_mem_io_unlock(man);
}
static int ttm_copy_io_page(void *dst, void *src, unsigned long page)
{
uint32_t *dstP =
(uint32_t *) ((unsigned long)dst + (page << PAGE_SHIFT));
uint32_t *srcP =
(uint32_t *) ((unsigned long)src + (page << PAGE_SHIFT));
int i;
for (i = 0; i < PAGE_SIZE / sizeof(uint32_t); ++i)
iowrite32(ioread32(srcP++), dstP++);
return 0;
}
static int ttm_copy_io_ttm_page(struct ttm_tt *ttm, void *src,
unsigned long page,
pgprot_t prot)
{
struct page *d = ttm->pages[page];
void *dst;
if (!d)
return -ENOMEM;
src = (void *)((unsigned long)src + (page << PAGE_SHIFT));
#ifdef CONFIG_X86
mm: stack based kmap_atomic() Keep the current interface but ignore the KM_type and use a stack based approach. The advantage is that we get rid of crappy code like: #define __KM_PTE \ (in_nmi() ? KM_NMI_PTE : \ in_irq() ? KM_IRQ_PTE : \ KM_PTE0) and in general can stop worrying about what context we're in and what kmap slots might be appropriate for that. The downside is that FRV kmap_atomic() gets more expensive. For now we use a CPP trick suggested by Andrew: #define kmap_atomic(page, args...) __kmap_atomic(page) to avoid having to touch all kmap_atomic() users in a single patch. [ not compiled on: - mn10300: the arch doesn't actually build with highmem to begin with ] [akpm@linux-foundation.org: coding-style fixes] [akpm@linux-foundation.org: fix up drivers/gpu/drm/i915/intel_overlay.c] Acked-by: Rik van Riel <riel@redhat.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Chris Metcalf <cmetcalf@tilera.com> Cc: David Howells <dhowells@redhat.com> Cc: Hugh Dickins <hughd@google.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: David Miller <davem@davemloft.net> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Dave Airlie <airlied@linux.ie> Cc: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-27 04:21:51 +07:00
dst = kmap_atomic_prot(d, prot);
#else
if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL))
dst = vmap(&d, 1, 0, prot);
else
dst = kmap(d);
#endif
if (!dst)
return -ENOMEM;
memcpy_fromio(dst, src, PAGE_SIZE);
#ifdef CONFIG_X86
mm: stack based kmap_atomic() Keep the current interface but ignore the KM_type and use a stack based approach. The advantage is that we get rid of crappy code like: #define __KM_PTE \ (in_nmi() ? KM_NMI_PTE : \ in_irq() ? KM_IRQ_PTE : \ KM_PTE0) and in general can stop worrying about what context we're in and what kmap slots might be appropriate for that. The downside is that FRV kmap_atomic() gets more expensive. For now we use a CPP trick suggested by Andrew: #define kmap_atomic(page, args...) __kmap_atomic(page) to avoid having to touch all kmap_atomic() users in a single patch. [ not compiled on: - mn10300: the arch doesn't actually build with highmem to begin with ] [akpm@linux-foundation.org: coding-style fixes] [akpm@linux-foundation.org: fix up drivers/gpu/drm/i915/intel_overlay.c] Acked-by: Rik van Riel <riel@redhat.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Chris Metcalf <cmetcalf@tilera.com> Cc: David Howells <dhowells@redhat.com> Cc: Hugh Dickins <hughd@google.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: David Miller <davem@davemloft.net> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Dave Airlie <airlied@linux.ie> Cc: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-27 04:21:51 +07:00
kunmap_atomic(dst);
#else
if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL))
vunmap(dst);
else
kunmap(d);
#endif
return 0;
}
static int ttm_copy_ttm_io_page(struct ttm_tt *ttm, void *dst,
unsigned long page,
pgprot_t prot)
{
struct page *s = ttm->pages[page];
void *src;
if (!s)
return -ENOMEM;
dst = (void *)((unsigned long)dst + (page << PAGE_SHIFT));
#ifdef CONFIG_X86
mm: stack based kmap_atomic() Keep the current interface but ignore the KM_type and use a stack based approach. The advantage is that we get rid of crappy code like: #define __KM_PTE \ (in_nmi() ? KM_NMI_PTE : \ in_irq() ? KM_IRQ_PTE : \ KM_PTE0) and in general can stop worrying about what context we're in and what kmap slots might be appropriate for that. The downside is that FRV kmap_atomic() gets more expensive. For now we use a CPP trick suggested by Andrew: #define kmap_atomic(page, args...) __kmap_atomic(page) to avoid having to touch all kmap_atomic() users in a single patch. [ not compiled on: - mn10300: the arch doesn't actually build with highmem to begin with ] [akpm@linux-foundation.org: coding-style fixes] [akpm@linux-foundation.org: fix up drivers/gpu/drm/i915/intel_overlay.c] Acked-by: Rik van Riel <riel@redhat.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Chris Metcalf <cmetcalf@tilera.com> Cc: David Howells <dhowells@redhat.com> Cc: Hugh Dickins <hughd@google.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: David Miller <davem@davemloft.net> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Dave Airlie <airlied@linux.ie> Cc: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-27 04:21:51 +07:00
src = kmap_atomic_prot(s, prot);
#else
if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL))
src = vmap(&s, 1, 0, prot);
else
src = kmap(s);
#endif
if (!src)
return -ENOMEM;
memcpy_toio(dst, src, PAGE_SIZE);
#ifdef CONFIG_X86
mm: stack based kmap_atomic() Keep the current interface but ignore the KM_type and use a stack based approach. The advantage is that we get rid of crappy code like: #define __KM_PTE \ (in_nmi() ? KM_NMI_PTE : \ in_irq() ? KM_IRQ_PTE : \ KM_PTE0) and in general can stop worrying about what context we're in and what kmap slots might be appropriate for that. The downside is that FRV kmap_atomic() gets more expensive. For now we use a CPP trick suggested by Andrew: #define kmap_atomic(page, args...) __kmap_atomic(page) to avoid having to touch all kmap_atomic() users in a single patch. [ not compiled on: - mn10300: the arch doesn't actually build with highmem to begin with ] [akpm@linux-foundation.org: coding-style fixes] [akpm@linux-foundation.org: fix up drivers/gpu/drm/i915/intel_overlay.c] Acked-by: Rik van Riel <riel@redhat.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Chris Metcalf <cmetcalf@tilera.com> Cc: David Howells <dhowells@redhat.com> Cc: Hugh Dickins <hughd@google.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: David Miller <davem@davemloft.net> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Dave Airlie <airlied@linux.ie> Cc: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-27 04:21:51 +07:00
kunmap_atomic(src);
#else
if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL))
vunmap(src);
else
kunmap(s);
#endif
return 0;
}
int ttm_bo_move_memcpy(struct ttm_buffer_object *bo,
bool evict, bool no_wait_gpu,
struct ttm_mem_reg *new_mem)
{
struct ttm_bo_device *bdev = bo->bdev;
struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type];
struct ttm_tt *ttm = bo->ttm;
struct ttm_mem_reg *old_mem = &bo->mem;
struct ttm_mem_reg old_copy = *old_mem;
void *old_iomap;
void *new_iomap;
int ret;
unsigned long i;
unsigned long page;
unsigned long add = 0;
int dir;
ret = ttm_mem_reg_ioremap(bdev, old_mem, &old_iomap);
if (ret)
return ret;
ret = ttm_mem_reg_ioremap(bdev, new_mem, &new_iomap);
if (ret)
goto out;
/*
* Single TTM move. NOP.
*/
if (old_iomap == NULL && new_iomap == NULL)
goto out2;
/*
* Don't move nonexistent data. Clear destination instead.
*/
if (old_iomap == NULL &&
(ttm == NULL || (ttm->state == tt_unpopulated &&
!(ttm->page_flags & TTM_PAGE_FLAG_SWAPPED)))) {
memset_io(new_iomap, 0, new_mem->num_pages*PAGE_SIZE);
goto out2;
}
/*
* TTM might be null for moves within the same region.
*/
if (ttm && ttm->state == tt_unpopulated) {
ret = ttm->bdev->driver->ttm_tt_populate(ttm);
if (ret)
goto out1;
}
add = 0;
dir = 1;
if ((old_mem->mem_type == new_mem->mem_type) &&
(new_mem->start < old_mem->start + old_mem->size)) {
dir = -1;
add = new_mem->num_pages - 1;
}
for (i = 0; i < new_mem->num_pages; ++i) {
page = i * dir + add;
if (old_iomap == NULL) {
pgprot_t prot = ttm_io_prot(old_mem->placement,
PAGE_KERNEL);
ret = ttm_copy_ttm_io_page(ttm, new_iomap, page,
prot);
} else if (new_iomap == NULL) {
pgprot_t prot = ttm_io_prot(new_mem->placement,
PAGE_KERNEL);
ret = ttm_copy_io_ttm_page(ttm, old_iomap, page,
prot);
} else
ret = ttm_copy_io_page(new_iomap, old_iomap, page);
if (ret)
goto out1;
}
mb();
out2:
old_copy = *old_mem;
*old_mem = *new_mem;
new_mem->mm_node = NULL;
if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && (ttm != NULL)) {
ttm_tt_unbind(ttm);
ttm_tt_destroy(ttm);
bo->ttm = NULL;
}
out1:
ttm_mem_reg_iounmap(bdev, old_mem, new_iomap);
out:
ttm_mem_reg_iounmap(bdev, &old_copy, old_iomap);
/*
* On error, keep the mm node!
*/
if (!ret)
ttm_bo_mem_put(bo, &old_copy);
return ret;
}
EXPORT_SYMBOL(ttm_bo_move_memcpy);
static void ttm_transfered_destroy(struct ttm_buffer_object *bo)
{
kfree(bo);
}
/**
* ttm_buffer_object_transfer
*
* @bo: A pointer to a struct ttm_buffer_object.
* @new_obj: A pointer to a pointer to a newly created ttm_buffer_object,
* holding the data of @bo with the old placement.
*
* This is a utility function that may be called after an accelerated move
* has been scheduled. A new buffer object is created as a placeholder for
* the old data while it's being copied. When that buffer object is idle,
* it can be destroyed, releasing the space of the old placement.
* Returns:
* !0: Failure.
*/
static int ttm_buffer_object_transfer(struct ttm_buffer_object *bo,
struct ttm_buffer_object **new_obj)
{
struct ttm_buffer_object *fbo;
struct ttm_bo_device *bdev = bo->bdev;
struct ttm_bo_driver *driver = bdev->driver;
int ret;
fbo = kmalloc(sizeof(*fbo), GFP_KERNEL);
if (!fbo)
return -ENOMEM;
*fbo = *bo;
/**
* Fix up members that we shouldn't copy directly:
* TODO: Explicit member copy would probably be better here.
*/
INIT_LIST_HEAD(&fbo->ddestroy);
INIT_LIST_HEAD(&fbo->lru);
INIT_LIST_HEAD(&fbo->swap);
INIT_LIST_HEAD(&fbo->io_reserve_lru);
drm_vma_node_reset(&fbo->vma_node);
atomic_set(&fbo->cpu_writers, 0);
spin_lock(&bdev->fence_lock);
if (bo->sync_obj)
fbo->sync_obj = driver->sync_obj_ref(bo->sync_obj);
else
fbo->sync_obj = NULL;
spin_unlock(&bdev->fence_lock);
kref_init(&fbo->list_kref);
kref_init(&fbo->kref);
fbo->destroy = &ttm_transfered_destroy;
fbo->acc_size = 0;
fbo->resv = &fbo->ttm_resv;
reservation_object_init(fbo->resv);
ret = ww_mutex_trylock(&fbo->resv->lock);
WARN_ON(!ret);
*new_obj = fbo;
return 0;
}
pgprot_t ttm_io_prot(uint32_t caching_flags, pgprot_t tmp)
{
#if defined(__i386__) || defined(__x86_64__)
if (caching_flags & TTM_PL_FLAG_WC)
tmp = pgprot_writecombine(tmp);
else if (boot_cpu_data.x86 > 3)
tmp = pgprot_noncached(tmp);
#elif defined(__powerpc__)
if (!(caching_flags & TTM_PL_FLAG_CACHED)) {
pgprot_val(tmp) |= _PAGE_NO_CACHE;
if (caching_flags & TTM_PL_FLAG_UNCACHED)
pgprot_val(tmp) |= _PAGE_GUARDED;
}
#endif
#if defined(__ia64__)
if (caching_flags & TTM_PL_FLAG_WC)
tmp = pgprot_writecombine(tmp);
else
tmp = pgprot_noncached(tmp);
#endif
#if defined(__sparc__) || defined(__mips__)
if (!(caching_flags & TTM_PL_FLAG_CACHED))
tmp = pgprot_noncached(tmp);
#endif
return tmp;
}
EXPORT_SYMBOL(ttm_io_prot);
static int ttm_bo_ioremap(struct ttm_buffer_object *bo,
unsigned long offset,
unsigned long size,
struct ttm_bo_kmap_obj *map)
{
struct ttm_mem_reg *mem = &bo->mem;
if (bo->mem.bus.addr) {
map->bo_kmap_type = ttm_bo_map_premapped;
map->virtual = (void *)(((u8 *)bo->mem.bus.addr) + offset);
} else {
map->bo_kmap_type = ttm_bo_map_iomap;
if (mem->placement & TTM_PL_FLAG_WC)
map->virtual = ioremap_wc(bo->mem.bus.base + bo->mem.bus.offset + offset,
size);
else
map->virtual = ioremap_nocache(bo->mem.bus.base + bo->mem.bus.offset + offset,
size);
}
return (!map->virtual) ? -ENOMEM : 0;
}
static int ttm_bo_kmap_ttm(struct ttm_buffer_object *bo,
unsigned long start_page,
unsigned long num_pages,
struct ttm_bo_kmap_obj *map)
{
struct ttm_mem_reg *mem = &bo->mem; pgprot_t prot;
struct ttm_tt *ttm = bo->ttm;
int ret;
BUG_ON(!ttm);
if (ttm->state == tt_unpopulated) {
ret = ttm->bdev->driver->ttm_tt_populate(ttm);
if (ret)
return ret;
}
if (num_pages == 1 && (mem->placement & TTM_PL_FLAG_CACHED)) {
/*
* We're mapping a single page, and the desired
* page protection is consistent with the bo.
*/
map->bo_kmap_type = ttm_bo_map_kmap;
map->page = ttm->pages[start_page];
map->virtual = kmap(map->page);
} else {
/*
* We need to use vmap to get the desired page protection
* or to make the buffer object look contiguous.
*/
prot = (mem->placement & TTM_PL_FLAG_CACHED) ?
PAGE_KERNEL :
ttm_io_prot(mem->placement, PAGE_KERNEL);
map->bo_kmap_type = ttm_bo_map_vmap;
map->virtual = vmap(ttm->pages + start_page, num_pages,
0, prot);
}
return (!map->virtual) ? -ENOMEM : 0;
}
int ttm_bo_kmap(struct ttm_buffer_object *bo,
unsigned long start_page, unsigned long num_pages,
struct ttm_bo_kmap_obj *map)
{
struct ttm_mem_type_manager *man =
&bo->bdev->man[bo->mem.mem_type];
unsigned long offset, size;
int ret;
BUG_ON(!list_empty(&bo->swap));
map->virtual = NULL;
map->bo = bo;
if (num_pages > bo->num_pages)
return -EINVAL;
if (start_page > bo->num_pages)
return -EINVAL;
#if 0
if (num_pages > 1 && !capable(CAP_SYS_ADMIN))
return -EPERM;
#endif
(void) ttm_mem_io_lock(man, false);
ret = ttm_mem_io_reserve(bo->bdev, &bo->mem);
ttm_mem_io_unlock(man);
if (ret)
return ret;
if (!bo->mem.bus.is_iomem) {
return ttm_bo_kmap_ttm(bo, start_page, num_pages, map);
} else {
offset = start_page << PAGE_SHIFT;
size = num_pages << PAGE_SHIFT;
return ttm_bo_ioremap(bo, offset, size, map);
}
}
EXPORT_SYMBOL(ttm_bo_kmap);
void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map)
{
struct ttm_buffer_object *bo = map->bo;
struct ttm_mem_type_manager *man =
&bo->bdev->man[bo->mem.mem_type];
if (!map->virtual)
return;
switch (map->bo_kmap_type) {
case ttm_bo_map_iomap:
iounmap(map->virtual);
break;
case ttm_bo_map_vmap:
vunmap(map->virtual);
break;
case ttm_bo_map_kmap:
kunmap(map->page);
break;
case ttm_bo_map_premapped:
break;
default:
BUG();
}
(void) ttm_mem_io_lock(man, false);
ttm_mem_io_free(map->bo->bdev, &map->bo->mem);
ttm_mem_io_unlock(man);
map->virtual = NULL;
map->page = NULL;
}
EXPORT_SYMBOL(ttm_bo_kunmap);
int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo,
void *sync_obj,
bool evict,
bool no_wait_gpu,
struct ttm_mem_reg *new_mem)
{
struct ttm_bo_device *bdev = bo->bdev;
struct ttm_bo_driver *driver = bdev->driver;
struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type];
struct ttm_mem_reg *old_mem = &bo->mem;
int ret;
struct ttm_buffer_object *ghost_obj;
void *tmp_obj = NULL;
spin_lock(&bdev->fence_lock);
if (bo->sync_obj) {
tmp_obj = bo->sync_obj;
bo->sync_obj = NULL;
}
bo->sync_obj = driver->sync_obj_ref(sync_obj);
if (evict) {
ret = ttm_bo_wait(bo, false, false, false);
spin_unlock(&bdev->fence_lock);
if (tmp_obj)
driver->sync_obj_unref(&tmp_obj);
if (ret)
return ret;
if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) &&
(bo->ttm != NULL)) {
ttm_tt_unbind(bo->ttm);
ttm_tt_destroy(bo->ttm);
bo->ttm = NULL;
}
ttm_bo_free_old_node(bo);
} else {
/**
* This should help pipeline ordinary buffer moves.
*
* Hang old buffer memory on a new buffer object,
* and leave it to be released when the GPU
* operation has completed.
*/
set_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags);
spin_unlock(&bdev->fence_lock);
if (tmp_obj)
driver->sync_obj_unref(&tmp_obj);
ret = ttm_buffer_object_transfer(bo, &ghost_obj);
if (ret)
return ret;
/**
* If we're not moving to fixed memory, the TTM object
* needs to stay alive. Otherwhise hang it on the ghost
* bo to be unbound and destroyed.
*/
if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED))
ghost_obj->ttm = NULL;
else
bo->ttm = NULL;
ttm_bo_unreserve(ghost_obj);
ttm_bo_unref(&ghost_obj);
}
*old_mem = *new_mem;
new_mem->mm_node = NULL;
return 0;
}
EXPORT_SYMBOL(ttm_bo_move_accel_cleanup);