diff options
| author | Jiadong.Zhu <Jiadong.Zhu@amd.com> | 2022-09-07 09:40:47 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2022-12-02 10:04:27 -0500 |
| commit | ded946f3f6399003ea0bdcc8911bc2fc3a7313c6 (patch) | |
| tree | 37544163adca01b8155e7cb92508a6257665a526 /drivers/gpu/drm/amd/amdgpu/amdgpu_ring_mux.h | |
| parent | 30ebe41582d1ea5a7de990319f9e593dad4886f7 (diff) | |
drm/amdgpu: Introduce gfx software ring (v9)
The software ring is created to support priority context while there is only
one hardware queue for gfx.
Every software ring has its fence driver and could be used as an ordinary ring
for the GPU scheduler.
Multiple software rings are bound to a real ring with the ring muxer. The
packages committed on the software ring are copied to the real ring.
v2: Use array to store software ring entry.
v3: Remove unnecessary prints.
v4: Remove amdgpu_ring_sw_init/fini functions,
using gtt for sw ring buffer for later dma copy
optimization.
v5: Allocate ring entry dynamically in the muxer.
v6: Update comments for the ring muxer.
v7: Modify for function naming.
v8: Combine software ring functions into amdgpu_ring_mux.c
v9: Use kernel-doc comment on the get_rptr function.
Cc: Christian Koenig <Christian.Koenig@amd.com>
Cc: Luben Tuikov <Luben.Tuikov@amd.com>
Cc: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com>
Cc: Michel Dänzer <michel@daenzer.net>
Signed-off-by: Jiadong.Zhu <Jiadong.Zhu@amd.com>
Acked-by: Huang Rui <ray.huang@amd.com>
Acked-by: Luben Tuikov <luben.tuikov@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_ring_mux.h')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_ring_mux.h | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring_mux.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring_mux.h new file mode 100644 index 000000000000..f58672a8e0ad --- /dev/null +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring_mux.h @@ -0,0 +1,76 @@ +/* + * Copyright 2022 Advanced Micro Devices, Inc. + * + * 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, sublicense, + * 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 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 NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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. + * + */ + +#ifndef __AMDGPU_RING_MUX__ +#define __AMDGPU_RING_MUX__ + +#include <linux/timer.h> +#include <linux/spinlock.h> +#include "amdgpu_ring.h" + +struct amdgpu_ring; +/** + * struct amdgpu_mux_entry - the entry recording software rings copying information. + * @ring: the pointer to the software ring. + * @start_ptr_in_hw_ring: last start location copied to in the hardware ring. + * @end_ptr_in_hw_ring: last end location copied to in the hardware ring. + * @sw_cptr: the position of the copy pointer in the sw ring. + * @sw_rptr: the read pointer in software ring. + * @sw_wptr: the write pointer in software ring. + */ +struct amdgpu_mux_entry { + struct amdgpu_ring *ring; + u64 start_ptr_in_hw_ring; + u64 end_ptr_in_hw_ring; + u64 sw_cptr; + u64 sw_rptr; + u64 sw_wptr; +}; + +struct amdgpu_ring_mux { + struct amdgpu_ring *real_ring; + + struct amdgpu_mux_entry *ring_entry; + unsigned int num_ring_entries; + unsigned int ring_entry_size; + /*the lock for copy data from different software rings*/ + spinlock_t lock; +}; + +int amdgpu_ring_mux_init(struct amdgpu_ring_mux *mux, struct amdgpu_ring *ring, + unsigned int entry_size); +void amdgpu_ring_mux_fini(struct amdgpu_ring_mux *mux); +int amdgpu_ring_mux_add_sw_ring(struct amdgpu_ring_mux *mux, struct amdgpu_ring *ring); +void amdgpu_ring_mux_set_wptr(struct amdgpu_ring_mux *mux, struct amdgpu_ring *ring, u64 wptr); +u64 amdgpu_ring_mux_get_wptr(struct amdgpu_ring_mux *mux, struct amdgpu_ring *ring); +u64 amdgpu_ring_mux_get_rptr(struct amdgpu_ring_mux *mux, struct amdgpu_ring *ring); + +u64 amdgpu_sw_ring_get_rptr_gfx(struct amdgpu_ring *ring); +u64 amdgpu_sw_ring_get_wptr_gfx(struct amdgpu_ring *ring); +void amdgpu_sw_ring_set_wptr_gfx(struct amdgpu_ring *ring); + +void amdgpu_sw_ring_insert_nop(struct amdgpu_ring *ring, uint32_t count); +void amdgpu_sw_ring_ib_begin(struct amdgpu_ring *ring); +void amdgpu_sw_ring_ib_end(struct amdgpu_ring *ring); + +#endif |