1/*
  2 * Copyright 2014 Advanced Micro Devices, Inc.
  3 *
  4 * Permission is hereby granted, free of charge, to any person obtaining a
  5 * copy of this software and associated documentation files (the "Software"),
  6 * to deal in the Software without restriction, including without limitation
  7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  8 * and/or sell copies of the Software, and to permit persons to whom the
  9 * Software is furnished to do so, subject to the following conditions:
 10 *
 11 * The above copyright notice and this permission notice shall be included in
 12 * all copies or substantial portions of the Software.
 13 *
 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 20 * OTHER DEALINGS IN THE SOFTWARE.
 21 *
 22 */
 23
 24#ifndef __AMDGPU_IRQ_H__
 25#define __AMDGPU_IRQ_H__
 26
 27#include <linux/irqdomain.h>
 28#include "soc15_ih_clientid.h"
 29#include "amdgpu_ih.h"
 30
 31#define AMDGPU_MAX_IRQ_SRC_ID		0x100
 32#define AMDGPU_MAX_IRQ_CLIENT_ID	0x100
 33
 34#define AMDGPU_IRQ_CLIENTID_LEGACY	0
 35#define AMDGPU_IRQ_CLIENTID_MAX		SOC15_IH_CLIENTID_MAX
 36
 37#define AMDGPU_IRQ_SRC_DATA_MAX_SIZE_DW	4
 38
 39struct amdgpu_device;
 40
 41enum amdgpu_interrupt_state {
 42	AMDGPU_IRQ_STATE_DISABLE,
 43	AMDGPU_IRQ_STATE_ENABLE,
 44};
 45
 46struct amdgpu_iv_entry {
 47	unsigned client_id;
 48	unsigned src_id;
 49	unsigned ring_id;
 50	unsigned vmid;
 51	unsigned vmid_src;
 52	uint64_t timestamp;
 53	unsigned timestamp_src;
 54	unsigned pasid;
 55	unsigned pasid_src;
 56	unsigned src_data[AMDGPU_IRQ_SRC_DATA_MAX_SIZE_DW];
 57	const uint32_t *iv_entry;
 58};
 59
 60struct amdgpu_irq_src {
 61	unsigned				num_types;
 62	atomic_t				*enabled_types;
 63	const struct amdgpu_irq_src_funcs	*funcs;
 64	void *data;
 65};
 66
 67struct amdgpu_irq_client {
 68	struct amdgpu_irq_src **sources;
 69};
 70
 71/* provided by interrupt generating IP blocks */
 72struct amdgpu_irq_src_funcs {
 73	int (*set)(struct amdgpu_device *adev, struct amdgpu_irq_src *source,
 74		   unsigned type, enum amdgpu_interrupt_state state);
 75
 76	int (*process)(struct amdgpu_device *adev,
 77		       struct amdgpu_irq_src *source,
 78		       struct amdgpu_iv_entry *entry);
 79};
 80
 81struct amdgpu_irq {
 82	bool				installed;
 83	spinlock_t			lock;
 84	/* interrupt sources */
 85	struct amdgpu_irq_client	client[AMDGPU_IRQ_CLIENTID_MAX];
 86
 87	/* status, etc. */
 88	bool				msi_enabled; /* msi enabled */
 89
 90	/* interrupt rings */
 91	struct amdgpu_ih_ring		ih, ih1, ih2;
 92	const struct amdgpu_ih_funcs    *ih_funcs;
 93	struct work_struct		ih1_work, ih2_work;
 94	struct amdgpu_irq_src		self_irq;
 95
 96	/* gen irq stuff */
 97	struct irq_domain		*domain; /* GPU irq controller domain */
 98	unsigned			virq[AMDGPU_MAX_IRQ_SRC_ID];
 99	uint32_t                        srbm_soft_reset;
100};
101
102void amdgpu_irq_disable_all(struct amdgpu_device *adev);
103irqreturn_t amdgpu_irq_handler(int irq, void *arg);
104
105int amdgpu_irq_init(struct amdgpu_device *adev);
106void amdgpu_irq_fini(struct amdgpu_device *adev);
107int amdgpu_irq_add_id(struct amdgpu_device *adev,
108		      unsigned client_id, unsigned src_id,
109		      struct amdgpu_irq_src *source);
110void amdgpu_irq_dispatch(struct amdgpu_device *adev,
111			 struct amdgpu_ih_ring *ih);
112int amdgpu_irq_update(struct amdgpu_device *adev, struct amdgpu_irq_src *src,
113		      unsigned type);
114int amdgpu_irq_get(struct amdgpu_device *adev, struct amdgpu_irq_src *src,
115		   unsigned type);
116int amdgpu_irq_put(struct amdgpu_device *adev, struct amdgpu_irq_src *src,
117		   unsigned type);
118bool amdgpu_irq_enabled(struct amdgpu_device *adev, struct amdgpu_irq_src *src,
119			unsigned type);
120void amdgpu_irq_gpu_reset_resume_helper(struct amdgpu_device *adev);
121
122int amdgpu_irq_add_domain(struct amdgpu_device *adev);
123void amdgpu_irq_remove_domain(struct amdgpu_device *adev);
124unsigned amdgpu_irq_create_mapping(struct amdgpu_device *adev, unsigned src_id);
125
126#endif