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-rw-r--r--drivers/gpu/drm/ttm/ttm_bo.c7
-rw-r--r--drivers/gpu/drm/ttm/ttm_bo_util.c124
-rw-r--r--drivers/gpu/drm/ttm/ttm_bo_vm.c41
-rw-r--r--include/drm/ttm/ttm_bo_api.h23
-rw-r--r--include/drm/ttm/ttm_bo_driver.h16
5 files changed, 126 insertions, 85 deletions
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index 40631e2866f8..b42e3fae1bd5 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -632,6 +632,7 @@ static int ttm_bo_evict(struct ttm_buffer_object *bo, bool interruptible,
evict_mem = bo->mem;
evict_mem.mm_node = NULL;
+ evict_mem.bus.io_reserved = false;
placement.fpfn = 0;
placement.lpfn = 0;
@@ -1005,6 +1006,7 @@ int ttm_bo_move_buffer(struct ttm_buffer_object *bo,
mem.num_pages = bo->num_pages;
mem.size = mem.num_pages << PAGE_SHIFT;
mem.page_alignment = bo->mem.page_alignment;
+ mem.bus.io_reserved = false;
/*
* Determine where to move the buffer.
*/
@@ -1160,6 +1162,7 @@ int ttm_bo_init(struct ttm_bo_device *bdev,
bo->mem.num_pages = bo->num_pages;
bo->mem.mm_node = NULL;
bo->mem.page_alignment = page_alignment;
+ bo->mem.bus.io_reserved = false;
bo->buffer_start = buffer_start & PAGE_MASK;
bo->priv_flags = 0;
bo->mem.placement = (TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED);
@@ -1574,7 +1577,7 @@ int ttm_bo_pci_offset(struct ttm_bo_device *bdev,
if (ttm_mem_reg_is_pci(bdev, mem)) {
*bus_offset = mem->mm_node->start << PAGE_SHIFT;
*bus_size = mem->num_pages << PAGE_SHIFT;
- *bus_base = man->io_offset;
+ *bus_base = man->io_offset + (uintptr_t)man->io_addr;
}
return 0;
@@ -1588,8 +1591,8 @@ void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo)
if (!bdev->dev_mapping)
return;
-
unmap_mapping_range(bdev->dev_mapping, offset, holelen, 1);
+ ttm_mem_io_free(bdev, &bo->mem);
}
EXPORT_SYMBOL(ttm_bo_unmap_virtual);
diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c b/drivers/gpu/drm/ttm/ttm_bo_util.c
index 865b2a826e13..d58eeb5ed22b 100644
--- a/drivers/gpu/drm/ttm/ttm_bo_util.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_util.c
@@ -81,30 +81,62 @@ int ttm_bo_move_ttm(struct ttm_buffer_object *bo,
}
EXPORT_SYMBOL(ttm_bo_move_ttm);
+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;
+
+ if (bdev->driver->io_mem_reserve) {
+ if (!mem->bus.io_reserved) {
+ mem->bus.io_reserved = true;
+ ret = bdev->driver->io_mem_reserve(bdev, mem);
+ if (unlikely(ret != 0))
+ return ret;
+ }
+ } else {
+ ret = ttm_bo_pci_offset(bdev, mem, &mem->bus.base, &mem->bus.offset, &mem->bus.size);
+ if (unlikely(ret != 0))
+ return ret;
+ mem->bus.addr = NULL;
+ if (!(man->flags & TTM_MEMTYPE_FLAG_NEEDS_IOREMAP))
+ mem->bus.addr = (void *)(((u8 *)man->io_addr) + mem->bus.offset);
+ mem->bus.is_iomem = (mem->bus.size > 0) ? 1 : 0;
+ }
+ return 0;
+}
+
+void ttm_mem_io_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
+{
+ if (bdev->driver->io_mem_reserve) {
+ if (mem->bus.io_reserved) {
+ mem->bus.io_reserved = false;
+ bdev->driver->io_mem_free(bdev, mem);
+ }
+ }
+}
+
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];
- unsigned long bus_offset;
- unsigned long bus_size;
- unsigned long bus_base;
int ret;
void *addr;
*virtual = NULL;
- ret = ttm_bo_pci_offset(bdev, mem, &bus_base, &bus_offset, &bus_size);
- if (ret || bus_size == 0)
+ ret = ttm_mem_io_reserve(bdev, mem);
+ if (ret)
return ret;
- if (!(man->flags & TTM_MEMTYPE_FLAG_NEEDS_IOREMAP))
- addr = (void *)(((u8 *) man->io_addr) + bus_offset);
- else {
+ if (mem->bus.addr) {
+ addr = mem->bus.addr;
+ } else {
if (mem->placement & TTM_PL_FLAG_WC)
- addr = ioremap_wc(bus_base + bus_offset, bus_size);
+ addr = ioremap_wc(mem->bus.base + mem->bus.offset, mem->bus.size);
else
- addr = ioremap_nocache(bus_base + bus_offset, bus_size);
- if (!addr)
+ addr = ioremap_nocache(mem->bus.base + mem->bus.offset, mem->bus.size);
+ if (!addr) {
+ ttm_mem_io_free(bdev, mem);
return -ENOMEM;
+ }
}
*virtual = addr;
return 0;
@@ -117,8 +149,9 @@ void ttm_mem_reg_iounmap(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem,
man = &bdev->man[mem->mem_type];
- if (virtual && (man->flags & TTM_MEMTYPE_FLAG_NEEDS_IOREMAP))
+ if (virtual && (man->flags & TTM_MEMTYPE_FLAG_NEEDS_IOREMAP || mem->bus.addr == NULL))
iounmap(virtual);
+ ttm_mem_io_free(bdev, mem);
}
static int ttm_copy_io_page(void *dst, void *src, unsigned long page)
@@ -370,26 +403,23 @@ pgprot_t ttm_io_prot(uint32_t caching_flags, pgprot_t tmp)
EXPORT_SYMBOL(ttm_io_prot);
static int ttm_bo_ioremap(struct ttm_buffer_object *bo,
- unsigned long bus_base,
- unsigned long bus_offset,
- unsigned long bus_size,
+ unsigned long offset,
+ unsigned long size,
struct ttm_bo_kmap_obj *map)
{
- struct ttm_bo_device *bdev = bo->bdev;
struct ttm_mem_reg *mem = &bo->mem;
- struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
- if (!(man->flags & TTM_MEMTYPE_FLAG_NEEDS_IOREMAP)) {
+ if (bo->mem.bus.addr) {
map->bo_kmap_type = ttm_bo_map_premapped;
- map->virtual = (void *)(((u8 *) man->io_addr) + bus_offset);
+ 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(bus_base + bus_offset,
- bus_size);
+ map->virtual = ioremap_wc(bo->mem.bus.base + bo->mem.bus.offset + offset,
+ size);
else
- map->virtual = ioremap_nocache(bus_base + bus_offset,
- bus_size);
+ map->virtual = ioremap_nocache(bo->mem.bus.base + bo->mem.bus.offset + offset,
+ size);
}
return (!map->virtual) ? -ENOMEM : 0;
}
@@ -442,13 +472,12 @@ int ttm_bo_kmap(struct ttm_buffer_object *bo,
unsigned long start_page, unsigned long num_pages,
struct ttm_bo_kmap_obj *map)
{
+ unsigned long offset, size;
int ret;
- unsigned long bus_base;
- unsigned long bus_offset;
- unsigned long bus_size;
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)
@@ -457,16 +486,15 @@ int ttm_bo_kmap(struct ttm_buffer_object *bo,
if (num_pages > 1 && !DRM_SUSER(DRM_CURPROC))
return -EPERM;
#endif
- ret = ttm_bo_pci_offset(bo->bdev, &bo->mem, &bus_base,
- &bus_offset, &bus_size);
+ ret = ttm_mem_io_reserve(bo->bdev, &bo->mem);
if (ret)
return ret;
- if (bus_size == 0) {
+ if (!bo->mem.bus.is_iomem) {
return ttm_bo_kmap_ttm(bo, start_page, num_pages, map);
} else {
- bus_offset += start_page << PAGE_SHIFT;
- bus_size = num_pages << PAGE_SHIFT;
- return ttm_bo_ioremap(bo, bus_base, bus_offset, bus_size, map);
+ offset = start_page << PAGE_SHIFT;
+ size = num_pages << PAGE_SHIFT;
+ return ttm_bo_ioremap(bo, offset, size, map);
}
}
EXPORT_SYMBOL(ttm_bo_kmap);
@@ -478,6 +506,7 @@ void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map)
switch (map->bo_kmap_type) {
case ttm_bo_map_iomap:
iounmap(map->virtual);
+ ttm_mem_io_free(map->bo->bdev, &map->bo->mem);
break;
case ttm_bo_map_vmap:
vunmap(map->virtual);
@@ -495,35 +524,6 @@ void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map)
}
EXPORT_SYMBOL(ttm_bo_kunmap);
-int ttm_bo_pfn_prot(struct ttm_buffer_object *bo,
- unsigned long dst_offset,
- unsigned long *pfn, pgprot_t *prot)
-{
- struct ttm_mem_reg *mem = &bo->mem;
- struct ttm_bo_device *bdev = bo->bdev;
- unsigned long bus_offset;
- unsigned long bus_size;
- unsigned long bus_base;
- int ret;
- ret = ttm_bo_pci_offset(bdev, mem, &bus_base, &bus_offset,
- &bus_size);
- if (ret)
- return -EINVAL;
- if (bus_size != 0)
- *pfn = (bus_base + bus_offset + dst_offset) >> PAGE_SHIFT;
- else
- if (!bo->ttm)
- return -EINVAL;
- else
- *pfn = page_to_pfn(ttm_tt_get_page(bo->ttm,
- dst_offset >>
- PAGE_SHIFT));
- *prot = (mem->placement & TTM_PL_FLAG_CACHED) ?
- PAGE_KERNEL : ttm_io_prot(mem->placement, PAGE_KERNEL);
-
- return 0;
-}
-
int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo,
void *sync_obj,
void *sync_obj_arg,
diff --git a/drivers/gpu/drm/ttm/ttm_bo_vm.c b/drivers/gpu/drm/ttm/ttm_bo_vm.c
index 668dbe8b8dd3..fe6cb77899f4 100644
--- a/drivers/gpu/drm/ttm/ttm_bo_vm.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c
@@ -74,9 +74,6 @@ static int ttm_bo_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
struct ttm_buffer_object *bo = (struct ttm_buffer_object *)
vma->vm_private_data;
struct ttm_bo_device *bdev = bo->bdev;
- unsigned long bus_base;
- unsigned long bus_offset;
- unsigned long bus_size;
unsigned long page_offset;
unsigned long page_last;
unsigned long pfn;
@@ -84,7 +81,6 @@ static int ttm_bo_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
struct page *page;
int ret;
int i;
- bool is_iomem;
unsigned long address = (unsigned long)vmf->virtual_address;
int retval = VM_FAULT_NOPAGE;
@@ -101,8 +97,21 @@ static int ttm_bo_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
return VM_FAULT_NOPAGE;
}
- if (bdev->driver->fault_reserve_notify)
- bdev->driver->fault_reserve_notify(bo);
+ if (bdev->driver->fault_reserve_notify) {
+ ret = bdev->driver->fault_reserve_notify(bo);
+ switch (ret) {
+ case 0:
+ break;
+ case -EBUSY:
+ set_need_resched();
+ case -ERESTARTSYS:
+ retval = VM_FAULT_NOPAGE;
+ goto out_unlock;
+ default:
+ retval = VM_FAULT_SIGBUS;
+ goto out_unlock;
+ }
+ }
/*
* Wait for buffer data in transit, due to a pipelined
@@ -122,15 +131,12 @@ static int ttm_bo_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
spin_unlock(&bo->lock);
- ret = ttm_bo_pci_offset(bdev, &bo->mem, &bus_base, &bus_offset,
- &bus_size);
- if (unlikely(ret != 0)) {
+ ret = ttm_mem_io_reserve(bdev, &bo->mem);
+ if (ret) {
retval = VM_FAULT_SIGBUS;
goto out_unlock;
}
- is_iomem = (bus_size != 0);
-
page_offset = ((address - vma->vm_start) >> PAGE_SHIFT) +
bo->vm_node->start - vma->vm_pgoff;
page_last = ((vma->vm_end - vma->vm_start) >> PAGE_SHIFT) +
@@ -154,8 +160,7 @@ static int ttm_bo_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
* vma->vm_page_prot when the object changes caching policy, with
* the correct locks held.
*/
-
- if (is_iomem) {
+ if (bo->mem.bus.is_iomem) {
vma->vm_page_prot = ttm_io_prot(bo->mem.placement,
vma->vm_page_prot);
} else {
@@ -171,10 +176,8 @@ static int ttm_bo_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
*/
for (i = 0; i < TTM_BO_VM_NUM_PREFAULT; ++i) {
-
- if (is_iomem)
- pfn = ((bus_base + bus_offset) >> PAGE_SHIFT) +
- page_offset;
+ if (bo->mem.bus.is_iomem)
+ pfn = ((bo->mem.bus.base + bo->mem.bus.offset) >> PAGE_SHIFT) + page_offset;
else {
page = ttm_tt_get_page(ttm, page_offset);
if (unlikely(!page && i == 0)) {
@@ -198,7 +201,6 @@ static int ttm_bo_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
retval =
(ret == -ENOMEM) ? VM_FAULT_OOM : VM_FAULT_SIGBUS;
goto out_unlock;
-
}
address += PAGE_SIZE;
@@ -221,8 +223,7 @@ static void ttm_bo_vm_open(struct vm_area_struct *vma)
static void ttm_bo_vm_close(struct vm_area_struct *vma)
{
- struct ttm_buffer_object *bo =
- (struct ttm_buffer_object *)vma->vm_private_data;
+ struct ttm_buffer_object *bo = (struct ttm_buffer_object *)vma->vm_private_data;
ttm_bo_unref(&bo);
vma->vm_private_data = NULL;
diff --git a/include/drm/ttm/ttm_bo_api.h b/include/drm/ttm/ttm_bo_api.h
index 8c8005ec4eaf..3e273e0b9417 100644
--- a/include/drm/ttm/ttm_bo_api.h
+++ b/include/drm/ttm/ttm_bo_api.h
@@ -66,6 +66,26 @@ struct ttm_placement {
const uint32_t *busy_placement;
};
+/**
+ * struct ttm_bus_placement
+ *
+ * @addr: mapped virtual address
+ * @base: bus base address
+ * @is_iomem: is this io memory ?
+ * @size: size in byte
+ * @offset: offset from the base address
+ *
+ * Structure indicating the bus placement of an object.
+ */
+struct ttm_bus_placement {
+ void *addr;
+ unsigned long base;
+ unsigned long size;
+ unsigned long offset;
+ bool is_iomem;
+ bool io_reserved;
+};
+
/**
* struct ttm_mem_reg
@@ -75,6 +95,7 @@ struct ttm_placement {
* @num_pages: Actual size of memory region in pages.
* @page_alignment: Page alignment.
* @placement: Placement flags.
+ * @bus: Placement on io bus accessible to the CPU
*
* Structure indicating the placement and space resources used by a
* buffer object.
@@ -87,6 +108,7 @@ struct ttm_mem_reg {
uint32_t page_alignment;
uint32_t mem_type;
uint32_t placement;
+ struct ttm_bus_placement bus;
};
/**
@@ -274,6 +296,7 @@ struct ttm_bo_kmap_obj {
ttm_bo_map_kmap = 3,
ttm_bo_map_premapped = 4 | TTM_BO_MAP_IOMEM_MASK,
} bo_kmap_type;
+ struct ttm_buffer_object *bo;
};
/**
diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h
index 69f70e418c2c..da39865d67d8 100644
--- a/include/drm/ttm/ttm_bo_driver.h
+++ b/include/drm/ttm/ttm_bo_driver.h
@@ -352,12 +352,21 @@ struct ttm_bo_driver {
struct ttm_mem_reg *new_mem);
/* notify the driver we are taking a fault on this BO
* and have reserved it */
- void (*fault_reserve_notify)(struct ttm_buffer_object *bo);
+ int (*fault_reserve_notify)(struct ttm_buffer_object *bo);
/**
* notify the driver that we're about to swap out this bo
*/
void (*swap_notify) (struct ttm_buffer_object *bo);
+
+ /**
+ * Driver callback on when mapping io memory (for bo_move_memcpy
+ * for instance). TTM will take care to call io_mem_free whenever
+ * the mapping is not use anymore. io_mem_reserve & io_mem_free
+ * are balanced.
+ */
+ int (*io_mem_reserve)(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem);
+ void (*io_mem_free)(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem);
};
/**
@@ -685,6 +694,11 @@ extern int ttm_bo_pci_offset(struct ttm_bo_device *bdev,
unsigned long *bus_offset,
unsigned long *bus_size);
+extern int ttm_mem_io_reserve(struct ttm_bo_device *bdev,
+ struct ttm_mem_reg *mem);
+extern void ttm_mem_io_free(struct ttm_bo_device *bdev,
+ struct ttm_mem_reg *mem);
+
extern void ttm_bo_global_release(struct ttm_global_reference *ref);
extern int ttm_bo_global_init(struct ttm_global_reference *ref);
generated by cgit v1.2.1 (git 2.18.0) at 2024-11-10 16:14:34 +0000