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authorLinus Torvalds <torvalds@linux-foundation.org>2019-07-15 19:04:27 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2019-07-15 19:04:27 -0700
commitbe8454afc50f43016ca8b6130d9673bdd0bd56ec (patch)
tree897e49c1ccadeed9b083a3ffc13f0dd2d6d7d874 /include/linux/dma-buf.h
parentfec88ab0af9706b2201e5daf377c5031c62d11f7 (diff)
parent3729fe2bc2a01f4cc1aa88be8f64af06084c87d6 (diff)
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Merge tag 'drm-next-2019-07-16' of git://anongit.freedesktop.org/drm/drm
Pull drm updates from Dave Airlie: "The biggest thing in this is the AMD Navi GPU support, this again contains a bunch of header files that are large. These are the new AMD RX5700 GPUs that just recently became available. New drivers: - ST-Ericsson MCDE driver - Ingenic JZ47xx SoC UAPI change: - HDR source metadata property Core: - HDR inforframes and EDID parsing - drm hdmi infoframe unpacking - remove prime sg_table caching into dma-buf - New gem vram helpers to reduce driver code - Lots of drmP.h removal - reservation fencing fix - documentation updates - drm_fb_helper_connector removed - mode name command handler rewrite fbcon: - Remove the fbcon notifiers ttm: - forward progress fixes dma-buf: - make mmap call optional - debugfs refcount fixes - dma-fence free with pending signals fix - each dma-buf gets an inode Panels: - Lots of additional panel bindings amdgpu: - initial navi10 support - avoid hw reset - HDR metadata support - new thermal sensors for vega asics - RAS fixes - use HMM rather than MMU notifier - xgmi topology via kfd - SR-IOV fixes - driver reload fixes - DC use a core bpc attribute - Aux fixes for DC - Bandwidth calc updates for DC - Clock handling refactor - kfd VEGAM support vmwgfx: - Coherent memory support changes i915: - HDR Support - HDMI i2c link - Icelake multi-segmented gamma support - GuC firmware update - Mule Creek Canyon PCH support for EHL - EHL platform updtes - move i915.alpha_support to i915.force_probe - runtime PM refactoring - VBT parsing refactoring - DSI fixes - struct mutex dependency reduction - GEM code reorg mali-dp: - Komeda driver features msm: - dsi vs EPROBE_DEFER fixes - msm8998 snapdragon 835 support - a540 gpu support - mdp5 and dpu interconnect support exynos: - drmP.h removal tegra: - misc fixes tda998x: - audio support improvements - pixel repeated mode support - quantisation range handling corrections - HDMI vendor info fix armada: - interlace support fix - overlay/video plane register handling refactor - add gamma support rockchip: - RX3328 support panfrost: - expose perf counters via hidden ioctls vkms: - enumerate CRC sources list ast: - rework BO handling mgag200: - rework BO handling dw-hdmi: - suspend/resume support rcar-du: - R8A774A1 Soc Support - LVDS dual-link mode support - Additional formats - Misc fixes omapdrm: - DSI command mode display support stm - fb modifier support - runtime PM support sun4i: - use vmap ops vc4: - binner bo binding rework v3d: - compute shader support - resync/sync fixes - job management refactoring lima: - NULL pointer in irq handler fix - scheduler default timeout virtio: - fence seqno support - trace events bochs: - misc fixes tc458767: - IRQ/HDP handling sii902x: - HDMI audio support atmel-hlcdc: - misc fixes meson: - zpos support" * tag 'drm-next-2019-07-16' of git://anongit.freedesktop.org/drm/drm: (1815 commits) Revert "Merge branch 'vmwgfx-next' of git://people.freedesktop.org/~thomash/linux into drm-next" Revert "mm: adjust apply_to_pfn_range interface for dropped token." mm: adjust apply_to_pfn_range interface for dropped token. drm/amdgpu/navi10: add uclk activity sensor drm/amdgpu: properly guard the generic discovery code drm/amdgpu: add missing documentation on new module parameters drm/amdgpu: don't invalidate caches in RELEASE_MEM, only do the writeback drm/amd/display: avoid 64-bit division drm/amdgpu/psp11: simplify the ucode register logic drm/amdgpu: properly guard DC support in navi code drm/amd/powerplay: vega20: fix uninitialized variable use drm/amd/display: dcn20: include linux/delay.h amdgpu: make pmu support optional drm/amd/powerplay: Zero initialize current_rpm in vega20_get_fan_speed_percent drm/amd/powerplay: Zero initialize freq in smu_v11_0_get_current_clk_freq drm/amd/powerplay: Use memset to initialize metrics structs drm/amdgpu/mes10.1: Fix header guard drm/amd/powerplay: add temperature sensor support for navi10 drm/amdgpu: fix scheduler timeout calc drm/amdgpu: Prepare for hmm_range_register API change (v2) ...
Diffstat (limited to 'include/linux/dma-buf.h')
-rw-r--r--include/linux/dma-buf.h52
1 files changed, 42 insertions, 10 deletions
diff --git a/include/linux/dma-buf.h b/include/linux/dma-buf.h
index 9b84114f74ce..bae060fae862 100644
--- a/include/linux/dma-buf.h
+++ b/include/linux/dma-buf.h
@@ -28,19 +28,21 @@ struct dma_buf_attachment;
/**
* struct dma_buf_ops - operations possible on struct dma_buf
- * @map_atomic: [optional] maps a page from the buffer into kernel address
- * space, users may not block until the subsequent unmap call.
- * This callback must not sleep.
- * @unmap_atomic: [optional] unmaps a atomically mapped page from the buffer.
- * This Callback must not sleep.
- * @map: [optional] maps a page from the buffer into kernel address space.
- * @unmap: [optional] unmaps a page from the buffer.
* @vmap: [optional] creates a virtual mapping for the buffer into kernel
* address space. Same restrictions as for vmap and friends apply.
* @vunmap: [optional] unmaps a vmap from the buffer
*/
struct dma_buf_ops {
/**
+ * @cache_sgt_mapping:
+ *
+ * If true the framework will cache the first mapping made for each
+ * attachment. This avoids creating mappings for attachments multiple
+ * times.
+ */
+ bool cache_sgt_mapping;
+
+ /**
* @attach:
*
* This is called from dma_buf_attach() to make sure that a given
@@ -194,8 +196,6 @@ struct dma_buf_ops {
* to be restarted.
*/
int (*end_cpu_access)(struct dma_buf *, enum dma_data_direction);
- void *(*map)(struct dma_buf *, unsigned long);
- void (*unmap)(struct dma_buf *, unsigned long, void *);
/**
* @mmap:
@@ -234,6 +234,31 @@ struct dma_buf_ops {
*/
int (*mmap)(struct dma_buf *, struct vm_area_struct *vma);
+ /**
+ * @map:
+ *
+ * Maps a page from the buffer into kernel address space. The page is
+ * specified by offset into the buffer in PAGE_SIZE units.
+ *
+ * This callback is optional.
+ *
+ * Returns:
+ *
+ * Virtual address pointer where requested page can be accessed. NULL
+ * on error or when this function is unimplemented by the exporter.
+ */
+ void *(*map)(struct dma_buf *, unsigned long);
+
+ /**
+ * @unmap:
+ *
+ * Unmaps a page from the buffer. Page offset and address pointer should
+ * be the same as the one passed to and returned by matching call to map.
+ *
+ * This callback is optional.
+ */
+ void (*unmap)(struct dma_buf *, unsigned long, void *);
+
void *(*vmap)(struct dma_buf *);
void (*vunmap)(struct dma_buf *, void *vaddr);
};
@@ -244,10 +269,12 @@ struct dma_buf_ops {
* @file: file pointer used for sharing buffers across, and for refcounting.
* @attachments: list of dma_buf_attachment that denotes all devices attached.
* @ops: dma_buf_ops associated with this buffer object.
- * @lock: used internally to serialize list manipulation, attach/detach and vmap/unmap
+ * @lock: used internally to serialize list manipulation, attach/detach and
+ * vmap/unmap, and accesses to name
* @vmapping_counter: used internally to refcnt the vmaps
* @vmap_ptr: the current vmap ptr if vmapping_counter > 0
* @exp_name: name of the exporter; useful for debugging.
+ * @name: userspace-provided name; useful for accounting and debugging.
* @owner: pointer to exporter module; used for refcounting when exporter is a
* kernel module.
* @list_node: node for dma_buf accounting and debugging.
@@ -275,6 +302,7 @@ struct dma_buf {
unsigned vmapping_counter;
void *vmap_ptr;
const char *exp_name;
+ const char *name;
struct module *owner;
struct list_head list_node;
void *priv;
@@ -296,6 +324,8 @@ struct dma_buf {
* @dmabuf: buffer for this attachment.
* @dev: device attached to the buffer.
* @node: list of dma_buf_attachment.
+ * @sgt: cached mapping.
+ * @dir: direction of cached mapping.
* @priv: exporter specific attachment data.
*
* This structure holds the attachment information between the dma_buf buffer
@@ -311,6 +341,8 @@ struct dma_buf_attachment {
struct dma_buf *dmabuf;
struct device *dev;
struct list_head node;
+ struct sg_table *sgt;
+ enum dma_data_direction dir;
void *priv;
};