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/*
* Copyright 2014 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_IH_H__
#define __AMDGPU_IH_H__
/* Maximum number of IVs processed at once */
#define AMDGPU_IH_MAX_NUM_IVS 32
#define IH_RING_SIZE (256 * 1024)
#define IH_SW_RING_SIZE (16 * 1024) /* enough for 512 CAM entries */
struct amdgpu_device;
struct amdgpu_iv_entry;
struct amdgpu_ih_regs {
uint32_t ih_rb_base;
uint32_t ih_rb_base_hi;
uint32_t ih_rb_cntl;
uint32_t ih_rb_wptr;
uint32_t ih_rb_rptr;
uint32_t ih_doorbell_rptr;
uint32_t ih_rb_wptr_addr_lo;
uint32_t ih_rb_wptr_addr_hi;
uint32_t psp_reg_id;
};
/*
* R6xx+ IH ring
*/
struct amdgpu_ih_ring {
unsigned ring_size;
uint32_t ptr_mask;
u32 doorbell_index;
bool use_doorbell;
bool use_bus_addr;
struct amdgpu_bo *ring_obj;
volatile uint32_t *ring;
uint64_t gpu_addr;
uint64_t wptr_addr;
volatile uint32_t *wptr_cpu;
uint64_t rptr_addr;
volatile uint32_t *rptr_cpu;
bool enabled;
unsigned rptr;
struct amdgpu_ih_regs ih_regs;
/* For waiting on IH processing at checkpoint. */
wait_queue_head_t wait_process;
uint64_t processed_timestamp;
};
/* return true if time stamp t2 is after t1 with 48bit wrap around */
#define amdgpu_ih_ts_after(t1, t2) \
(((int64_t)((t2) << 16) - (int64_t)((t1) << 16)) > 0LL)
/* provided by the ih block */
struct amdgpu_ih_funcs {
/* ring read/write ptr handling, called from interrupt context */
u32 (*get_wptr)(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih);
void (*decode_iv)(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih,
struct amdgpu_iv_entry *entry);
uint64_t (*decode_iv_ts)(struct amdgpu_ih_ring *ih, u32 rptr,
signed int offset);
void (*set_rptr)(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih);
};
#define amdgpu_ih_get_wptr(adev, ih) (adev)->irq.ih_funcs->get_wptr((adev), (ih))
#define amdgpu_ih_decode_iv(adev, iv) \
(adev)->irq.ih_funcs->decode_iv((adev), (ih), (iv))
#define amdgpu_ih_decode_iv_ts(adev, ih, rptr, offset) \
(WARN_ON_ONCE(!(adev)->irq.ih_funcs->decode_iv_ts) ? 0 : \
(adev)->irq.ih_funcs->decode_iv_ts((ih), (rptr), (offset)))
#define amdgpu_ih_set_rptr(adev, ih) (adev)->irq.ih_funcs->set_rptr((adev), (ih))
int amdgpu_ih_ring_init(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih,
unsigned ring_size, bool use_bus_addr);
void amdgpu_ih_ring_fini(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih);
void amdgpu_ih_ring_write(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih,
const uint32_t *iv, unsigned int num_dw);
int amdgpu_ih_wait_on_checkpoint_process_ts(struct amdgpu_device *adev,
struct amdgpu_ih_ring *ih);
int amdgpu_ih_process(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih);
void amdgpu_ih_decode_iv_helper(struct amdgpu_device *adev,
struct amdgpu_ih_ring *ih,
struct amdgpu_iv_entry *entry);
uint64_t amdgpu_ih_decode_iv_ts_helper(struct amdgpu_ih_ring *ih, u32 rptr,
signed int offset);
#endif
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