+ iowrite32(ioread32(src++),
dst++);
+ }
+ if (src_ops->unmap_local)
+ src_ops->unmap_local(src_iter,
&src_map);
+ if (dst_ops->unmap_local)
+ dst_ops->unmap_local(dst_iter,
&dst_map);
+ }
}
+EXPORT_SYMBOL(ttm_move_memcpy);
int ttm_bo_move_memcpy(struct ttm_buffer_object *bo,
struct ttm_operation_ctx *ctx,
- struct ttm_resource *new_mem)
+ struct ttm_resource *dst_mem)
{
struct ttm_device *bdev = bo->bdev;
- struct ttm_resource_manager *man =
ttm_manager_type(bdev, new_mem->mem_type);
+ struct ttm_resource_manager *dst_man =
+ ttm_manager_type(bo->bdev, dst_mem->mem_type);
struct ttm_tt *ttm = bo->ttm;
- struct ttm_resource *old_mem = &bo->mem;
- struct ttm_resource old_copy = *old_mem;
- void *old_iomap;
- void *new_iomap;
+ struct ttm_resource *src_mem = &bo->mem;
+ struct ttm_resource_manager *src_man =
+ ttm_manager_type(bdev, src_mem->mem_type);
+ struct ttm_resource src_copy = *src_mem;
+ union {
+ struct ttm_kmap_iter_tt tt;
+ struct ttm_kmap_iter_linear_io io;
+ } _dst_iter, _src_iter;
+ struct ttm_kmap_iter *dst_iter, *src_iter;
int ret;
- unsigned long i;
- ret = ttm_bo_wait_ctx(bo, ctx);
- if (ret)
- return ret;
-
- ret = ttm_resource_ioremap(bdev, old_mem, &old_iomap);
- if (ret)
- return ret;
- ret = ttm_resource_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_tt_is_populated(ttm) &&
- !(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) {
+ if (ttm && ((ttm->page_flags & TTM_PAGE_FLAG_SWAPPED)
||
+ dst_man->use_tt)) {
ret = ttm_tt_populate(bdev, ttm, ctx);
if (ret)
- goto out1;
+ return ret;
}
- for (i = 0; i < new_mem->num_pages; ++i) {
- if (old_iomap == NULL) {
- pgprot_t prot = ttm_io_prot(bo,
old_mem, PAGE_KERNEL);
- ret = ttm_copy_ttm_io_page(ttm,
new_iomap, i,
- prot);
- } else if (new_iomap == NULL) {
- pgprot_t prot = ttm_io_prot(bo,
new_mem, PAGE_KERNEL);
- ret = ttm_copy_io_ttm_page(ttm,
old_iomap, i,
- prot);
- } else {
- ret = ttm_copy_io_page(new_iomap,
old_iomap, i);
- }
- if (ret)
- goto out1;
+ dst_iter = ttm_kmap_iter_linear_io_init(&_dst_iter.io,
bdev, dst_mem);
+ if (PTR_ERR(dst_iter) == -EINVAL && dst_man->use_tt)
+ dst_iter = ttm_kmap_iter_tt_init(&_dst_iter.tt,
bo->ttm);
+ if (IS_ERR(dst_iter))
+ return PTR_ERR(dst_iter);
+
+ src_iter = ttm_kmap_iter_linear_io_init(&_src_iter.io,
bdev, src_mem);
+ if (PTR_ERR(src_iter) == -EINVAL && src_man->use_tt)
+ src_iter = ttm_kmap_iter_tt_init(&_src_iter.tt,
bo->ttm);
+ if (IS_ERR(src_iter)) {
+ ret = PTR_ERR(src_iter);
+ goto out_src_iter;
}
- mb();
-out2:
- old_copy = *old_mem;
- ttm_bo_assign_mem(bo, new_mem);
-
- if (!man->use_tt)
- ttm_bo_tt_destroy(bo);
+ ttm_move_memcpy(bo, dst_mem, dst_iter, src_iter);
+ src_copy = *src_mem;
+ ttm_bo_move_sync_cleanup(bo, dst_mem);
-out1:
- ttm_resource_iounmap(bdev, old_mem, new_iomap);
-out:
- ttm_resource_iounmap(bdev, &old_copy, old_iomap);
+ if (!src_iter->ops->maps_tt)
+ ttm_kmap_iter_linear_io_fini(&_src_iter.io,
bdev, &src_copy);
+out_src_iter:
+ if (!dst_iter->ops->maps_tt)
+ ttm_kmap_iter_linear_io_fini(&_dst_iter.io,
bdev, dst_mem);
- /*
- * On error, keep the mm node!
- */
- if (!ret)
- ttm_resource_free(bo, &old_copy);
return ret;
}
EXPORT_SYMBOL(ttm_bo_move_memcpy);
@@ -336,27 +272,7 @@ pgprot_t ttm_io_prot(struct
ttm_buffer_object *bo, struct ttm_resource *res,
man = ttm_manager_type(bo->bdev, res->mem_type);
caching = man->use_tt ? bo->ttm->caching : res-
bus.caching;
- /* Cached mappings need no adjustment */
- if (caching == ttm_cached)
- return tmp;
-
-#if defined(__i386__) || defined(__x86_64__)
- if (caching == ttm_write_combined)
- tmp = pgprot_writecombine(tmp);
- else if (boot_cpu_data.x86 > 3)
- tmp = pgprot_noncached(tmp);
-#endif
-#if defined(__ia64__) || defined(__arm__) ||
defined(__aarch64__) || \
- defined(__powerpc__) || defined(__mips__)
- if (caching == ttm_write_combined)
- tmp = pgprot_writecombine(tmp);
- else
- tmp = pgprot_noncached(tmp);
-#endif
-#if defined(__sparc__)
- tmp = pgprot_noncached(tmp);
-#endif
- return tmp;
+ return ttm_prot_from_caching(caching, tmp);
}
EXPORT_SYMBOL(ttm_io_prot);
diff --git a/drivers/gpu/drm/ttm/ttm_module.c
b/drivers/gpu/drm/ttm/ttm_module.c
index 56b0efdba1a9..997c458f68a9 100644
--- a/drivers/gpu/drm/ttm/ttm_module.c
+++ b/drivers/gpu/drm/ttm/ttm_module.c
@@ -31,12 +31,47 @@
*/
#include <linux/module.h>
#include <linux/device.h>
+#include <linux/pgtable.h>
#include <linux/sched.h>
#include <linux/debugfs.h>
#include <drm/drm_sysfs.h>
+#include <drm/ttm/ttm_caching.h>
#include "ttm_module.h"
+/**
+ * ttm_prot_from_caching - Modify the page protection
according to the
+ * ttm cacing mode
+ * @caching: The ttm caching mode
+ * @tmp: The original page protection
+ *
+ * Return: The modified page protection
+ */
+pgprot_t ttm_prot_from_caching(enum ttm_caching caching,
pgprot_t tmp)
+{
+ /* Cached mappings need no adjustment */
+ if (caching == ttm_cached)
+ return tmp;
+
+#if defined(__i386__) || defined(__x86_64__)
+ if (caching == ttm_write_combined)
+ tmp = pgprot_writecombine(tmp);
+ else if (boot_cpu_data.x86 > 3)
+ tmp = pgprot_noncached(tmp);
+#endif
+#if defined(__ia64__) || defined(__arm__) ||
defined(__aarch64__) || \
+ defined(__powerpc__) || defined(__mips__)
+ if (caching == ttm_write_combined)
+ tmp = pgprot_writecombine(tmp);
+ else
+ tmp = pgprot_noncached(tmp);
+#endif
+#if defined(__sparc__)
+ tmp = pgprot_noncached(tmp);
+#endif
+ return tmp;
+}
+
struct dentry *ttm_debugfs_root;
static int __init ttm_init(void)
diff --git a/drivers/gpu/drm/ttm/ttm_resource.c
b/drivers/gpu/drm/ttm/ttm_resource.c
index 59e2b7157e41..e05ae7e3d477 100644
--- a/drivers/gpu/drm/ttm/ttm_resource.c
+++ b/drivers/gpu/drm/ttm/ttm_resource.c
@@ -22,6 +22,10 @@
* Authors: Christian König
*/
+#include <linux/dma-buf-map.h>
+#include <linux/io-mapping.h>
+#include <linux/scatterlist.h>
+
#include <drm/ttm/ttm_resource.h>
#include <drm/ttm/ttm_bo_driver.h>
@@ -147,3 +151,165 @@ void ttm_resource_manager_debug(struct
ttm_resource_manager *man,
man->func->debug(man, p);
}
EXPORT_SYMBOL(ttm_resource_manager_debug);
+
+static void ttm_kmap_iter_iomap_map_local(struct ttm_kmap_iter
*iter,
+ struct dma_buf_map
*dmap,
+ pgoff_t i)
+{
+ struct ttm_kmap_iter_iomap *iter_io =
+ container_of(iter, typeof(*iter_io), base);
+ void __iomem *addr;
+
+retry:
+ while (i >= iter_io->cache.end) {
+ iter_io->cache.sg = iter_io->cache.sg ?
+ sg_next(iter_io->cache.sg) : iter_io-
st->sgl;
+ iter_io->cache.i = iter_io->cache.end;
+ iter_io->cache.end += sg_dma_len(iter_io-
cache.sg) >>
+ PAGE_SHIFT;
+ iter_io->cache.offs = sg_dma_address(iter_io-
cache.sg) -
+ iter_io->start;
+ }
+
+ if (i < iter_io->cache.i) {
+ iter_io->cache.end = 0;
+ iter_io->cache.sg = NULL;
+ goto retry;
+ }
+
+ addr = io_mapping_map_local_wc(iter_io->iomap, iter_io-
cache.offs +
+ (((resource_size_t)i -
iter_io->cache.i)
+ << PAGE_SHIFT));
+ dma_buf_map_set_vaddr_iomem(dmap, addr);
+}
+
+static void ttm_kmap_iter_iomap_unmap_local(struct
ttm_kmap_iter *iter,
+ struct dma_buf_map
*map)
+{
+ io_mapping_unmap_local(map->vaddr_iomem);
+}
+
+static const struct ttm_kmap_iter_ops ttm_kmap_iter_io_ops = {
+ .map_local = ttm_kmap_iter_iomap_map_local,
+ .unmap_local = ttm_kmap_iter_iomap_unmap_local,
+ .maps_tt = false,
+};
+
+/**
+ * ttm_kmap_iter_iomap_init - Initialize a struct
ttm_kmap_iter_iomap
+ * @iter_io: The struct ttm_kmap_iter_iomap to initialize.
+ * @iomap: The struct io_mapping representing the underlying
linear io_memory.
+ * @st: sg_table into @iomap, representing the memory of the
struct
+ * ttm_resource.
+ * @start: Offset that needs to be subtracted from @st to make
+ * sg_dma_address(st->sgl) - @start == 0 for @iomap start.
+ *
+ * Return: Pointer to the embedded struct ttm_kmap_iter.
+ */
+struct ttm_kmap_iter *
+ttm_kmap_iter_iomap_init(struct ttm_kmap_iter_iomap *iter_io,
+ struct io_mapping *iomap,
+ struct sg_table *st,
+ resource_size_t start)
+{
+ iter_io->base.ops = &ttm_kmap_iter_io_ops;
+ iter_io->iomap = iomap;
+ iter_io->st = st;
+ iter_io->start = start;
+ memset(&iter_io->cache, 0, sizeof(iter_io->cache));
+
+ return &iter_io->base;
+}
+EXPORT_SYMBOL(ttm_kmap_iter_iomap_init);
+
+/**
+ * DOC: Linear io iterator
+ *
+ * This code should die in the not too near future. Best would
be if we could
+ * make io-mapping use memremap for all io memory, and have
memremap
+ * implement a kmap_local functionality. We could then strip a
huge amount of
+ * code. These linear io iterators are implemented to mimic
old functionality,
+ * and they don't use kmap_local semantics at all internally.
Rather ioremap or
+ * friends, and at least on 32-bit they add global TLB flushes
and points
+ * of failure.
+ */
+
+static void ttm_kmap_iter_linear_io_map_local(struct
ttm_kmap_iter *iter,
+ struct
dma_buf_map *dmap,
+ pgoff_t i)
+{
+ struct ttm_kmap_iter_linear_io *iter_io =
+ container_of(iter, typeof(*iter_io), base);
+
+ *dmap = iter_io->dmap;
+ dma_buf_map_incr(dmap, i * PAGE_SIZE);
+}
+
+static const struct ttm_kmap_iter_ops
ttm_kmap_iter_linear_io_ops = {
+ .map_local = ttm_kmap_iter_linear_io_map_local,
+ .maps_tt = false,
+};
+
+struct ttm_kmap_iter *
+ttm_kmap_iter_linear_io_init(struct ttm_kmap_iter_linear_io
*iter_io,
+ struct ttm_device *bdev,
+ struct ttm_resource *mem)
+{
+ int ret;
+
+ ret = ttm_mem_io_reserve(bdev, mem);
+ if (ret)
+ goto out_err;
+ if (!mem->bus.is_iomem) {
+ ret = -EINVAL;
+ goto out_io_free;
+ }
+
+ if (mem->bus.addr) {
+ dma_buf_map_set_vaddr(&iter_io->dmap, mem-
bus.addr);
+ iter_io->needs_unmap = false;
+ } else {
+ size_t bus_size = (size_t)mem->num_pages <<
PAGE_SHIFT;
+
+ iter_io->needs_unmap = true;
+ if (mem->bus.caching == ttm_write_combined)
+ dma_buf_map_set_vaddr_iomem(&iter_io-
dmap,
+
ioremap_wc(mem->bus.offset,
+
bus_size));
+ else if (mem->bus.caching == ttm_cached)
+ dma_buf_map_set_vaddr(&iter_io->dmap,
+ memremap(mem-
bus.offset, bus_size,
+
MEMREMAP_WB));
