/*
 * SPDX-License-Identifier: MIT
 *
 * Copyright © 2008-2018 Intel Corporation
 */

#ifndef _I915_GPU_ERROR_H_
#define _I915_GPU_ERROR_H_

#include <linux/atomic.h>
#include <linux/kref.h>
#include <linux/ktime.h>
#include <linux/sched.h>

#include <drm/drm_mm.h>

#include "gt/intel_engine.h"
#include "gt/intel_gt_types.h"
#include "gt/uc/intel_uc_fw.h"

#include "intel_device_info.h"

#include "i915_gem.h"
#include "i915_gem_gtt.h"
#include "i915_params.h"
#include "i915_scheduler.h"

struct drm_i915_private;
struct i915_vma_compress;
struct intel_engine_capture_vma;
struct intel_overlay_error_state;

struct i915_vma_coredump {
        struct i915_vma_coredump *next;

        char name[20];

        u64 gtt_offset;
        u64 gtt_size;
        u32 gtt_page_sizes;

        int num_pages;
        int page_count;
        int unused;
        u32 *pages[];
};

struct i915_request_coredump {
        unsigned long flags;
        pid_t pid;
        u32 context;
        u32 seqno;
        u32 head;
        u32 tail;
        struct i915_sched_attr sched_attr;
};

struct intel_engine_coredump {
        const struct intel_engine_cs *engine;

        bool hung;
        bool simulated;
        u32 reset_count;

        /* position of active request inside the ring */
        u32 rq_head, rq_post, rq_tail;

        /* Register state */
        u32 ccid;
        u32 start;
        u32 tail;
        u32 head;
        u32 ctl;
        u32 mode;
        u32 hws;
        u32 ipeir;
        u32 ipehr;
        u32 esr;
        u32 bbstate;
        u32 instpm;
        u32 instps;
        u64 bbaddr;
        u64 acthd;
        u32 fault_reg;
        u64 faddr;
        u32 rc_psmi; /* sleep state */
        struct intel_instdone instdone;

        struct i915_gem_context_coredump {
                char comm[TASK_COMM_LEN];

                u64 total_runtime;
                u32 avg_runtime;

                pid_t pid;
                int active;
                int guilty;
                struct i915_sched_attr sched_attr;
        } context;

        struct i915_vma_coredump *vma;

        struct i915_request_coredump execlist[EXECLIST_MAX_PORTS];
        unsigned int num_ports;

        struct {
                u32 gfx_mode;
                union {
                        u64 pdp[4];
                        u32 pp_dir_base;
                };
        } vm_info;

        struct intel_engine_coredump *next;
};

struct intel_gt_coredump {
        const struct intel_gt *_gt;
        bool awake;
        bool simulated;

        struct intel_gt_info info;

        /* Generic register state */
        u32 eir;
        u32 pgtbl_er;
        u32 ier;
        u32 gtier[6], ngtier;
        u32 derrmr;
        u32 forcewake;
        u32 error; /* gen6+ */
        u32 err_int; /* gen7 */
        u32 fault_data0; /* gen8, gen9 */
        u32 fault_data1; /* gen8, gen9 */
        u32 done_reg;
        u32 gac_eco;
        u32 gam_ecochk;
        u32 gab_ctl;
        u32 gfx_mode;
        u32 gtt_cache;
        u32 aux_err; /* gen12 */
        u32 sfc_done[GEN12_SFC_DONE_MAX]; /* gen12 */
        u32 gam_done; /* gen12 */

        u32 nfence;
        u64 fence[I915_MAX_NUM_FENCES];

        struct intel_engine_coredump *engine;

        struct intel_uc_coredump {
                struct intel_uc_fw guc_fw;
                struct intel_uc_fw huc_fw;
                struct i915_vma_coredump *guc_log;
        } *uc;

        struct intel_gt_coredump *next;
};

struct i915_gpu_coredump {
        struct kref ref;
        ktime_t time;
        ktime_t boottime;
        ktime_t uptime;
        unsigned long capture;

        struct drm_i915_private *i915;

        struct intel_gt_coredump *gt;

        char error_msg[128];
        bool simulated;
        bool wakelock;
        bool suspended;
        int iommu;
        u32 reset_count;
        u32 suspend_count;

        struct intel_device_info device_info;
        struct intel_runtime_info runtime_info;
        struct intel_driver_caps driver_caps;
        struct i915_params params;

        struct intel_overlay_error_state *overlay;

        struct scatterlist *sgl, *fit;
};

struct i915_gpu_error {
        /* For reset and error_state handling. */
        spinlock_t lock;
        /* Protected by the above dev->gpu_error.lock. */
        struct i915_gpu_coredump *first_error;

        atomic_t pending_fb_pin;

        /** Number of times the device has been reset (global) */
        atomic_t reset_count;

        /** Number of times an engine has been reset */
        atomic_t reset_engine_count[I915_NUM_ENGINES];
};

struct drm_i915_error_state_buf {
        struct drm_i915_private *i915;
        struct scatterlist *sgl, *cur, *end;

        char *buf;
        size_t bytes;
        size_t size;
        loff_t iter;

        int err;
};

#if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)

__printf(2, 3)
void i915_error_printf(struct drm_i915_error_state_buf *e, const char *f, ...);

struct i915_gpu_coredump *i915_gpu_coredump(struct intel_gt *gt,
                                            intel_engine_mask_t engine_mask);
void i915_capture_error_state(struct intel_gt *gt,
                              intel_engine_mask_t engine_mask);

struct i915_gpu_coredump *
i915_gpu_coredump_alloc(struct drm_i915_private *i915, gfp_t gfp);

struct intel_gt_coredump *
intel_gt_coredump_alloc(struct intel_gt *gt, gfp_t gfp);

struct intel_engine_coredump *
intel_engine_coredump_alloc(struct intel_engine_cs *engine, gfp_t gfp);

struct intel_engine_capture_vma *
intel_engine_coredump_add_request(struct intel_engine_coredump *ee,
                                  struct i915_request *rq,
                                  gfp_t gfp);

void intel_engine_coredump_add_vma(struct intel_engine_coredump *ee,
                                   struct intel_engine_capture_vma *capture,
                                   struct i915_vma_compress *compress);

struct i915_vma_compress *
i915_vma_capture_prepare(struct intel_gt_coredump *gt);

void i915_vma_capture_finish(struct intel_gt_coredump *gt,
                             struct i915_vma_compress *compress);

void i915_error_state_store(struct i915_gpu_coredump *error);

static inline struct i915_gpu_coredump *
i915_gpu_coredump_get(struct i915_gpu_coredump *gpu)
{
        kref_get(&gpu->ref);
        return gpu;
}

ssize_t
i915_gpu_coredump_copy_to_buffer(struct i915_gpu_coredump *error,
                                 char *buf, loff_t offset, size_t count);

void __i915_gpu_coredump_free(struct kref *kref);
static inline void i915_gpu_coredump_put(struct i915_gpu_coredump *gpu)
{
        if (gpu)
                kref_put(&gpu->ref, __i915_gpu_coredump_free);
}

struct i915_gpu_coredump *i915_first_error_state(struct drm_i915_private *i915);
void i915_reset_error_state(struct drm_i915_private *i915);
void i915_disable_error_state(struct drm_i915_private *i915, int err);

#else

static inline void
i915_capture_error_state(struct intel_gt *gt, intel_engine_mask_t engine_mask)
{
}

static inline struct i915_gpu_coredump *
i915_gpu_coredump_alloc(struct drm_i915_private *i915, gfp_t gfp)
{
        return NULL;
}

static inline struct intel_gt_coredump *
intel_gt_coredump_alloc(struct intel_gt *gt, gfp_t gfp)
{
        return NULL;
}

static inline struct intel_engine_coredump *
intel_engine_coredump_alloc(struct intel_engine_cs *engine, gfp_t gfp)
{
        return NULL;
}

static inline struct intel_engine_capture_vma *
intel_engine_coredump_add_request(struct intel_engine_coredump *ee,
                                  struct i915_request *rq,
                                  gfp_t gfp)
{
        return NULL;
}

static inline void
intel_engine_coredump_add_vma(struct intel_engine_coredump *ee,
                              struct intel_engine_capture_vma *capture,
                              struct i915_vma_compress *compress)
{
}

static inline struct i915_vma_compress *
i915_vma_capture_prepare(struct intel_gt_coredump *gt)
{
        return NULL;
}

static inline void
i915_vma_capture_finish(struct intel_gt_coredump *gt,
                        struct i915_vma_compress *compress)
{
}

static inline void
i915_error_state_store(struct i915_gpu_coredump *error)
{
}

static inline void i915_gpu_coredump_put(struct i915_gpu_coredump *gpu)
{
}

static inline struct i915_gpu_coredump *
i915_first_error_state(struct drm_i915_private *i915)
{
        return ERR_PTR(-ENODEV);
}

static inline void i915_reset_error_state(struct drm_i915_private *i915)
{
}

static inline void i915_disable_error_state(struct drm_i915_private *i915,
                                            int err)
{
}

#endif /* IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR) */

#endif /* _I915_GPU_ERROR_H_ */