/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (C) 2015 Broadcom
 */
#ifndef _VC4_DRV_H_
#define _VC4_DRV_H_

#include <linux/debugfs.h>
#include <linux/delay.h>
#include <linux/of.h>
#include <linux/refcount.h>
#include <linux/uaccess.h>

#include <drm/drm_atomic.h>
#include <drm/drm_debugfs.h>
#include <drm/drm_device.h>
#include <drm/drm_encoder.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_gem_dma_helper.h>
#include <drm/drm_managed.h>
#include <drm/drm_mm.h>
#include <drm/drm_modeset_lock.h>

#include <kunit/test-bug.h>

#include "uapi/drm/vc4_drm.h"

struct drm_device;
struct drm_gem_object;

extern const struct drm_driver vc4_drm_driver;
extern const struct drm_driver vc5_drm_driver;

/* Don't forget to update vc4_bo.c: bo_type_names[] when adding to
 * this.
 */
enum vc4_kernel_bo_type {
        /* Any kernel allocation (gem_create_object hook) before it
         * gets another type set.
         */
        VC4_BO_TYPE_KERNEL,
        VC4_BO_TYPE_V3D,
        VC4_BO_TYPE_V3D_SHADER,
        VC4_BO_TYPE_DUMB,
        VC4_BO_TYPE_BIN,
        VC4_BO_TYPE_RCL,
        VC4_BO_TYPE_BCL,
        VC4_BO_TYPE_KERNEL_CACHE,
        VC4_BO_TYPE_COUNT
};

/* Performance monitor object. The perform lifetime is controlled by userspace
 * using perfmon related ioctls. A perfmon can be attached to a submit_cl
 * request, and when this is the case, HW perf counters will be activated just
 * before the submit_cl is submitted to the GPU and disabled when the job is
 * done. This way, only events related to a specific job will be counted.
 */
struct vc4_perfmon {
        struct vc4_dev *dev;

        /* Tracks the number of users of the perfmon, when this counter reaches
         * zero the perfmon is destroyed.
         */
        refcount_t refcnt;

        /* Number of counters activated in this perfmon instance
         * (should be less than DRM_VC4_MAX_PERF_COUNTERS).
         */
        u8 ncounters;

        /* Events counted by the HW perf counters. */
        u8 events[DRM_VC4_MAX_PERF_COUNTERS];

        /* Storage for counter values. Counters are incremented by the HW
         * perf counter values every time the perfmon is attached to a GPU job.
         * This way, perfmon users don't have to retrieve the results after
         * each job if they want to track events covering several submissions.
         * Note that counter values can't be reset, but you can fake a reset by
         * destroying the perfmon and creating a new one.
         */
        u64 counters[] __counted_by(ncounters);
};

enum vc4_gen {
        VC4_GEN_4,
        VC4_GEN_5,
        VC4_GEN_6_C,
        VC4_GEN_6_D,
};

struct vc4_dev {
        struct drm_device base;
        struct device *dev;

        enum vc4_gen gen;

        unsigned int irq;

        struct vc4_hvs *hvs;
        struct vc4_v3d *v3d;

        struct vc4_hang_state *hang_state;

        /* The kernel-space BO cache.  Tracks buffers that have been
         * unreferenced by all other users (refcounts of 0!) but not
         * yet freed, so we can do cheap allocations.
         */
        struct vc4_bo_cache {
                /* Array of list heads for entries in the BO cache,
                 * based on number of pages, so we can do O(1) lookups
                 * in the cache when allocating.
                 */
                struct list_head *size_list;
                uint32_t size_list_size;

                /* List of all BOs in the cache, ordered by age, so we
                 * can do O(1) lookups when trying to free old
                 * buffers.
                 */
                struct list_head time_list;
                struct work_struct time_work;
                struct timer_list time_timer;
        } bo_cache;

        u32 num_labels;
        struct vc4_label {
                const char *name;
                u32 num_allocated;
                u32 size_allocated;
        } *bo_labels;

        /* Protects bo_cache and bo_labels. */
        struct mutex bo_lock;

        /* Purgeable BO pool. All BOs in this pool can have their memory
         * reclaimed if the driver is unable to allocate new BOs. We also
         * keep stats related to the purge mechanism here.
         */
        struct {
                struct list_head list;
                unsigned int num;
                size_t size;
                unsigned int purged_num;
                size_t purged_size;
                struct mutex lock;
        } purgeable;

        uint64_t dma_fence_context;

        /* Sequence number for the last job queued in bin_job_list.
         * Starts at 0 (no jobs emitted).
         */
        uint64_t emit_seqno;

        /* Sequence number for the last completed job on the GPU.
         * Starts at 0 (no jobs completed).
         */
        uint64_t finished_seqno;

        /* List of all struct vc4_exec_info for jobs to be executed in
         * the binner.  The first job in the list is the one currently
         * programmed into ct0ca for execution.
         */
        struct list_head bin_job_list;

        /* List of all struct vc4_exec_info for jobs that have
         * completed binning and are ready for rendering.  The first
         * job in the list is the one currently programmed into ct1ca
         * for execution.
         */
        struct list_head render_job_list;

        /* List of the finished vc4_exec_infos waiting to be freed by
         * job_done_work.
         */
        struct list_head job_done_list;
        /* Spinlock used to synchronize the job_list and seqno
         * accesses between the IRQ handler and GEM ioctls.
         */
        spinlock_t job_lock;
        wait_queue_head_t job_wait_queue;
        struct work_struct job_done_work;

        /* Used to track the active perfmon if any. Access to this field is
         * protected by job_lock.
         */
        struct vc4_perfmon *active_perfmon;

        /* The memory used for storing binner tile alloc, tile state,
         * and overflow memory allocations.  This is freed when V3D
         * powers down.
         */
        struct vc4_bo *bin_bo;

        /* Size of blocks allocated within bin_bo. */
        uint32_t bin_alloc_size;

        /* Bitmask of the bin_alloc_size chunks in bin_bo that are
         * used.
         */
        uint32_t bin_alloc_used;

        /* Bitmask of the current bin_alloc used for overflow memory. */
        uint32_t bin_alloc_overflow;

        /* Incremented when an underrun error happened after an atomic commit.
         * This is particularly useful to detect when a specific modeset is too
         * demanding in term of memory or HVS bandwidth which is hard to guess
         * at atomic check time.
         */
        atomic_t underrun;

        struct work_struct overflow_mem_work;

        int power_refcount;

        /* Set to true when the load tracker is active. */
        bool load_tracker_enabled;

        /* Mutex controlling the power refcount. */
        struct mutex power_lock;

        struct {
                struct timer_list timer;
                struct work_struct reset_work;
        } hangcheck;

        struct drm_modeset_lock ctm_state_lock;
        struct drm_private_obj ctm_manager;
        struct drm_private_obj hvs_channels;
        struct drm_private_obj load_tracker;

        /* Mutex for binner bo allocation. */
        struct mutex bin_bo_lock;
        /* Reference count for our binner bo. */
        struct kref bin_bo_kref;
};

#define to_vc4_dev(_dev)                        \
        container_of_const(_dev, struct vc4_dev, base)

struct vc4_bo {
        struct drm_gem_dma_object base;

        bool t_format;

        /* List entry for the BO's position in either
         * vc4_exec_info->unref_list or vc4_dev->bo_cache.time_list
         */
        struct list_head unref_head;

        /* Time in jiffies when the BO was put in vc4->bo_cache. */
        unsigned long free_time;

        /* List entry for the BO's position in vc4_dev->bo_cache.size_list */
        struct list_head size_head;

        /* Struct for shader validation state, if created by
         * DRM_IOCTL_VC4_CREATE_SHADER_BO.
         */
        struct vc4_validated_shader_info *validated_shader;

        /* One of enum vc4_kernel_bo_type, or VC4_BO_TYPE_COUNT + i
         * for user-allocated labels.
         */
        int label;

        /* Count the number of active users. This is needed to determine
         * whether we can move the BO to the purgeable list or not (when the BO
         * is used by the GPU or the display engine we can't purge it).
         */
        refcount_t usecnt;

        /* Store purgeable/purged state here */
        u32 madv;
        struct mutex madv_lock;
};

#define to_vc4_bo(_bo)                                                  \
        container_of_const(to_drm_gem_dma_obj(_bo), struct vc4_bo, base)

struct vc4_fence {
        struct dma_fence base;
        struct drm_device *dev;
        /* vc4 seqno for signaled() test */
        uint64_t seqno;
};

#define to_vc4_fence(_fence)                                    \
        container_of_const(_fence, struct vc4_fence, base)

struct vc4_v3d {
        struct vc4_dev *vc4;
        struct platform_device *pdev;
        void __iomem *regs;
        struct clk *clk;
        struct debugfs_regset32 regset;
};

#define VC4_NUM_UPM_HANDLES 32
struct vc4_upm_refcounts {
        refcount_t refcount;

        /* Allocation size */
        size_t size;
        /* Our allocation in UPM for prefetching. */
        struct drm_mm_node upm;

        /* Pointer back to the HVS structure */
        struct vc4_hvs *hvs;
};

#define HVS_NUM_CHANNELS 3

struct vc4_hvs {
        struct vc4_dev *vc4;
        struct platform_device *pdev;
        void __iomem *regs;
        u32 __iomem *dlist;
        unsigned int dlist_mem_size;

        struct clk *core_clk;
        struct clk *disp_clk;

        unsigned long max_core_rate;

        /* Memory manager for CRTCs to allocate space in the display
         * list.  Units are dwords.
         */
        struct drm_mm dlist_mm;

        /* Memory manager for the LBM memory used by HVS scaling. */
        struct drm_mm lbm_mm;

        /* Memory manager for the UPM memory used for prefetching. */
        struct drm_mm upm_mm;
        struct ida upm_handles;
        struct vc4_upm_refcounts upm_refcounts[VC4_NUM_UPM_HANDLES + 1];

        spinlock_t mm_lock;

        struct drm_mm_node mitchell_netravali_filter;

        struct debugfs_regset32 regset;

        /*
         * Even if HDMI0 on the RPi4 can output modes requiring a pixel
         * rate higher than 297MHz, it needs some adjustments in the
         * config.txt file to be able to do so and thus won't always be
         * available.
         */
        bool vc5_hdmi_enable_hdmi_20;

        /*
         * 4096x2160@60 requires a core overclock to work, so register
         * whether that is sufficient.
         */
        bool vc5_hdmi_enable_4096by2160;
};

#define HVS_NUM_CHANNELS 3
#define HVS_UBM_WORD_SIZE 256

struct vc4_hvs_state {
        struct drm_private_state base;
        unsigned long core_clock_rate;

        struct {
                unsigned in_use: 1;
                unsigned long fifo_load;
                struct drm_crtc_commit *pending_commit;
        } fifo_state[HVS_NUM_CHANNELS];
};

#define to_vc4_hvs_state(_state)                                \
        container_of_const(_state, struct vc4_hvs_state, base)

struct vc4_hvs_state *vc4_hvs_get_global_state(struct drm_atomic_state *state);
struct vc4_hvs_state *vc4_hvs_get_old_global_state(const struct drm_atomic_state *state);
struct vc4_hvs_state *vc4_hvs_get_new_global_state(const struct drm_atomic_state *state);

struct vc4_plane {
        struct drm_plane base;
};

#define to_vc4_plane(_plane)                                    \
        container_of_const(_plane, struct vc4_plane, base)

enum vc4_scaling_mode {
        VC4_SCALING_NONE,
        VC4_SCALING_TPZ,
        VC4_SCALING_PPF,
};

struct vc4_plane_state {
        struct drm_plane_state base;
        /* System memory copy of the display list for this element, computed
         * at atomic_check time.
         */
        u32 *dlist;
        u32 dlist_size; /* Number of dwords allocated for the display list */
        u32 dlist_count; /* Number of used dwords in the display list. */

        /* Offset in the dlist to various words, for pageflip or
         * cursor updates.
         */
        u32 pos0_offset;
        u32 pos2_offset;
        u32 ptr0_offset[DRM_FORMAT_MAX_PLANES];
        u32 lbm_offset;

        /* Offset where the plane's dlist was last stored in the
         * hardware at vc4_crtc_atomic_flush() time.
         */
        u32 __iomem *hw_dlist;

        /* Clipped coordinates of the plane on the display. */
        int crtc_x, crtc_y, crtc_w, crtc_h;
        /* Clipped area being scanned from in the FB in u16.16 format */
        u32 src_x, src_y;

        u32 src_w[2], src_h[2];

        /* Scaling selection for the RGB/Y plane and the Cb/Cr planes. */
        enum vc4_scaling_mode x_scaling[2], y_scaling[2];
        bool is_unity;
        bool is_yuv;

        /* Our allocation in LBM for temporary storage during scaling. */
        struct drm_mm_node lbm;

        /* The Unified Pre-Fetcher Handle */
        unsigned int upm_handle[DRM_FORMAT_MAX_PLANES];

        /* Number of lines to pre-fetch */
        unsigned int upm_buffer_lines;

        /* Set when the plane has per-pixel alpha content or does not cover
         * the entire screen. This is a hint to the CRTC that it might need
         * to enable background color fill.
         */
        bool needs_bg_fill;

        /* Mark the dlist as initialized. Useful to avoid initializing it twice
         * when async update is not possible.
         */
        bool dlist_initialized;

        /* Load of this plane on the HVS block. The load is expressed in HVS
         * cycles/sec.
         */
        u64 hvs_load;

        /* Memory bandwidth needed for this plane. This is expressed in
         * bytes/sec.
         */
        u64 membus_load;
};

#define to_vc4_plane_state(_state)                              \
        container_of_const(_state, struct vc4_plane_state, base)

enum vc4_encoder_type {
        VC4_ENCODER_TYPE_NONE,
        VC4_ENCODER_TYPE_HDMI0,
        VC4_ENCODER_TYPE_HDMI1,
        VC4_ENCODER_TYPE_VEC,
        VC4_ENCODER_TYPE_DSI0,
        VC4_ENCODER_TYPE_DSI1,
        VC4_ENCODER_TYPE_SMI,
        VC4_ENCODER_TYPE_DPI,
        VC4_ENCODER_TYPE_TXP0,
        VC4_ENCODER_TYPE_TXP1,
};

struct vc4_encoder {
        struct drm_encoder base;
        enum vc4_encoder_type type;
        u32 clock_select;

        void (*pre_crtc_configure)(struct drm_encoder *encoder, struct drm_atomic_state *state);
        void (*pre_crtc_enable)(struct drm_encoder *encoder, struct drm_atomic_state *state);
        void (*post_crtc_enable)(struct drm_encoder *encoder, struct drm_atomic_state *state);

        void (*post_crtc_disable)(struct drm_encoder *encoder, struct drm_atomic_state *state);
        void (*post_crtc_powerdown)(struct drm_encoder *encoder, struct drm_atomic_state *state);
};

#define to_vc4_encoder(_encoder)                                \
        container_of_const(_encoder, struct vc4_encoder, base)

static inline
struct drm_encoder *vc4_find_encoder_by_type(struct drm_device *drm,
                                             enum vc4_encoder_type type)
{
        struct drm_encoder *encoder;

        drm_for_each_encoder(encoder, drm) {
                struct vc4_encoder *vc4_encoder = to_vc4_encoder(encoder);

                if (vc4_encoder->type == type)
                        return encoder;
        }

        return NULL;
}

struct vc4_crtc_data {
        const char *name;

        const char *debugfs_name;

        /* Bitmask of channels (FIFOs) of the HVS that the output can source from */
        unsigned int hvs_available_channels;

        /* Which output of the HVS this pixelvalve sources from. */
        int hvs_output;
};

struct vc4_txp_data {
        struct vc4_crtc_data    base;
        enum vc4_encoder_type encoder_type;
        unsigned int high_addr_ptr_reg;
        unsigned int has_byte_enable:1;
        unsigned int size_minus_one:1;
        unsigned int supports_40bit_addresses:1;
};

extern const struct vc4_txp_data bcm2835_txp_data;

struct vc4_pv_data {
        struct vc4_crtc_data    base;

        /* Depth of the PixelValve FIFO in bytes */
        unsigned int fifo_depth;

        /* Number of pixels output per clock period */
        u8 pixels_per_clock;

        enum vc4_encoder_type encoder_types[4];
};

extern const struct vc4_pv_data bcm2835_pv0_data;
extern const struct vc4_pv_data bcm2835_pv1_data;
extern const struct vc4_pv_data bcm2835_pv2_data;
extern const struct vc4_pv_data bcm2711_pv0_data;
extern const struct vc4_pv_data bcm2711_pv1_data;
extern const struct vc4_pv_data bcm2711_pv2_data;
extern const struct vc4_pv_data bcm2711_pv3_data;
extern const struct vc4_pv_data bcm2711_pv4_data;
extern const struct vc4_pv_data bcm2712_pv0_data;
extern const struct vc4_pv_data bcm2712_pv1_data;

struct vc4_crtc {
        struct drm_crtc base;
        struct platform_device *pdev;
        const struct vc4_crtc_data *data;
        void __iomem *regs;

        /* Timestamp at start of vblank irq - unaffected by lock delays. */
        ktime_t t_vblank;

        u8 lut_r[256];
        u8 lut_g[256];
        u8 lut_b[256];

        struct drm_pending_vblank_event *event;

        struct debugfs_regset32 regset;

        /**
         * @feeds_txp: True if the CRTC feeds our writeback controller.
         */
        bool feeds_txp;

        /**
         * @irq_lock: Spinlock protecting the resources shared between
         * the atomic code and our vblank handler.
         */
        spinlock_t irq_lock;

        /**
         * @current_dlist: Start offset of the display list currently
         * set in the HVS for that CRTC. Protected by @irq_lock, and
         * copied in vc4_hvs_update_dlist() for the CRTC interrupt
         * handler to have access to that value.
         */
        unsigned int current_dlist;

        /**
         * @current_hvs_channel: HVS channel currently assigned to the
         * CRTC. Protected by @irq_lock, and copied in
         * vc4_hvs_atomic_begin() for the CRTC interrupt handler to have
         * access to that value.
         */
        unsigned int current_hvs_channel;
};

#define to_vc4_crtc(_crtc)                                      \
        container_of_const(_crtc, struct vc4_crtc, base)

static inline const struct vc4_crtc_data *
vc4_crtc_to_vc4_crtc_data(const struct vc4_crtc *crtc)
{
        return crtc->data;
}

static inline const struct vc4_pv_data *
vc4_crtc_to_vc4_pv_data(const struct vc4_crtc *crtc)
{
        const struct vc4_crtc_data *data = vc4_crtc_to_vc4_crtc_data(crtc);

        return container_of_const(data, struct vc4_pv_data, base);
}

struct drm_encoder *vc4_get_crtc_encoder(struct drm_crtc *crtc,
                                         struct drm_crtc_state *state);

struct vc4_crtc_state {
        struct drm_crtc_state base;
        /* Dlist area for this CRTC configuration. */
        struct drm_mm_node mm;
        bool txp_armed;
        unsigned int assigned_channel;

        struct drm_connector_tv_margins margins;

        unsigned long hvs_load;

        /* Transitional state below, only valid during atomic commits */
        bool update_muxing;
};

#define VC4_HVS_CHANNEL_DISABLED ((unsigned int)-1)

#define to_vc4_crtc_state(_state)                               \
        container_of_const(_state, struct vc4_crtc_state, base)

#define V3D_READ(offset)                                                                \
        ({                                                                              \
                kunit_fail_current_test("Accessing a register in a unit test!\n");      \
                readl(vc4->v3d->regs + (offset));                                               \
        })

#define V3D_WRITE(offset, val)                                                          \
        do {                                                                            \
                kunit_fail_current_test("Accessing a register in a unit test!\n");      \
                writel(val, vc4->v3d->regs + (offset));                                 \
        } while (0)

#define HVS_READ(offset)                                                                \
        ({                                                                              \
                kunit_fail_current_test("Accessing a register in a unit test!\n");      \
                readl(hvs->regs + (offset));                                            \
        })

#define HVS_WRITE(offset, val)                                                          \
        do {                                                                            \
                kunit_fail_current_test("Accessing a register in a unit test!\n");      \
                writel(val, hvs->regs + (offset));                                      \
        } while (0)

#define HVS_READ6(offset) \
        HVS_READ(hvs->vc4->gen == VC4_GEN_6_C ? SCALER6_ ## offset : SCALER6D_ ## offset)

#define HVS_WRITE6(offset, val) \
        HVS_WRITE(hvs->vc4->gen == VC4_GEN_6_C ? SCALER6_ ## offset : SCALER6D_ ## offset, val)

#define VC4_REG32(reg) { .name = #reg, .offset = reg }

struct vc4_exec_info {
        struct vc4_dev *dev;

        /* Sequence number for this bin/render job. */
        uint64_t seqno;

        struct dma_fence *fence;

        /* Last current addresses the hardware was processing when the
         * hangcheck timer checked on us.
         */
        uint32_t last_ct0ca, last_ct1ca;

        /* Kernel-space copy of the ioctl arguments */
        struct drm_vc4_submit_cl *args;

        /* This is the array of BOs that were looked up at the start of exec.
         * Command validation will use indices into this array.
         */
        struct drm_gem_object **bo;
        uint32_t bo_count;

        /* List of BOs that are being written by the RCL.  Other than
         * the binner temporary storage, this is all the BOs written
         * by the job.
         */
        struct drm_gem_dma_object *rcl_write_bo[4];
        uint32_t rcl_write_bo_count;

        /* Pointers for our position in vc4->job_list */
        struct list_head head;

        /* List of other BOs used in the job that need to be released
         * once the job is complete.
         */
        struct list_head unref_list;

        /* Current unvalidated indices into @bo loaded by the non-hardware
         * VC4_PACKET_GEM_HANDLES.
         */
        uint32_t bo_index[2];

        /* This is the BO where we store the validated command lists, shader
         * records, and uniforms.
         */
        struct drm_gem_dma_object *exec_bo;

        /**
         * This tracks the per-shader-record state (packet 64) that
         * determines the length of the shader record and the offset
         * it's expected to be found at.  It gets read in from the
         * command lists.
         */
        struct vc4_shader_state {
                uint32_t addr;
                /* Maximum vertex index referenced by any primitive using this
                 * shader state.
                 */
                uint32_t max_index;
        } *shader_state;

        /** How many shader states the user declared they were using. */
        uint32_t shader_state_size;
        /** How many shader state records the validator has seen. */
        uint32_t shader_state_count;

        bool found_tile_binning_mode_config_packet;
        bool found_start_tile_binning_packet;
        bool found_increment_semaphore_packet;
        bool found_flush;
        uint8_t bin_tiles_x, bin_tiles_y;
        /* Physical address of the start of the tile alloc array
         * (where each tile's binned CL will start)
         */
        uint32_t tile_alloc_offset;
        /* Bitmask of which binner slots are freed when this job completes. */
        uint32_t bin_slots;

        /**
         * Computed addresses pointing into exec_bo where we start the
         * bin thread (ct0) and render thread (ct1).
         */
        uint32_t ct0ca, ct0ea;
        uint32_t ct1ca, ct1ea;

        /* Pointer to the unvalidated bin CL (if present). */
        void *bin_u;

        /* Pointers to the shader recs.  These paddr gets incremented as CL
         * packets are relocated in validate_gl_shader_state, and the vaddrs
         * (u and v) get incremented and size decremented as the shader recs
         * themselves are validated.
         */
        void *shader_rec_u;
        void *shader_rec_v;
        uint32_t shader_rec_p;
        uint32_t shader_rec_size;

        /* Pointers to the uniform data.  These pointers are incremented, and
         * size decremented, as each batch of uniforms is uploaded.
         */
        void *uniforms_u;
        void *uniforms_v;
        uint32_t uniforms_p;
        uint32_t uniforms_size;

        /* Pointer to a performance monitor object if the user requested it,
         * NULL otherwise.
         */
        struct vc4_perfmon *perfmon;

        /* Whether the exec has taken a reference to the binner BO, which should
         * happen with a VC4_PACKET_TILE_BINNING_MODE_CONFIG packet.
         */
        bool bin_bo_used;
};

/* Per-open file private data. Any driver-specific resource that has to be
 * released when the DRM file is closed should be placed here.
 */
struct vc4_file {
        struct vc4_dev *dev;

        struct {
                struct idr idr;
                struct mutex lock;
        } perfmon;

        bool bin_bo_used;
};

static inline struct vc4_exec_info *
vc4_first_bin_job(struct vc4_dev *vc4)
{
        return list_first_entry_or_null(&vc4->bin_job_list,
                                        struct vc4_exec_info, head);
}

static inline struct vc4_exec_info *
vc4_first_render_job(struct vc4_dev *vc4)
{
        return list_first_entry_or_null(&vc4->render_job_list,
                                        struct vc4_exec_info, head);
}

static inline struct vc4_exec_info *
vc4_last_render_job(struct vc4_dev *vc4)
{
        if (list_empty(&vc4->render_job_list))
                return NULL;
        return list_last_entry(&vc4->render_job_list,
                               struct vc4_exec_info, head);
}

/**
 * struct vc4_texture_sample_info - saves the offsets into the UBO for texture
 * setup parameters.
 *
 * This will be used at draw time to relocate the reference to the texture
 * contents in p0, and validate that the offset combined with
 * width/height/stride/etc. from p1 and p2/p3 doesn't sample outside the BO.
 * Note that the hardware treats unprovided config parameters as 0, so not all
 * of them need to be set up for every texure sample, and we'll store ~0 as
 * the offset to mark the unused ones.
 *
 * See the VC4 3D architecture guide page 41 ("Texture and Memory Lookup Unit
 * Setup") for definitions of the texture parameters.
 */
struct vc4_texture_sample_info {
        bool is_direct;
        uint32_t p_offset[4];
};

/**
 * struct vc4_validated_shader_info - information about validated shaders that
 * needs to be used from command list validation.
 *
 * For a given shader, each time a shader state record references it, we need
 * to verify that the shader doesn't read more uniforms than the shader state
 * record's uniform BO pointer can provide, and we need to apply relocations
 * and validate the shader state record's uniforms that define the texture
 * samples.
 */
struct vc4_validated_shader_info {
        uint32_t uniforms_size;
        uint32_t uniforms_src_size;
        uint32_t num_texture_samples;
        struct vc4_texture_sample_info *texture_samples;

        uint32_t num_uniform_addr_offsets;
        uint32_t *uniform_addr_offsets;

        bool is_threaded;
};

/**
 * __wait_for - magic wait macro
 *
 * Macro to help avoid open coding check/wait/timeout patterns. Note that it's
 * important that we check the condition again after having timed out, since the
 * timeout could be due to preemption or similar and we've never had a chance to
 * check the condition before the timeout.
 */
#define __wait_for(OP, COND, US, Wmin, Wmax) ({ \
        const ktime_t end__ = ktime_add_ns(ktime_get_raw(), 1000ll * (US)); \
        long wait__ = (Wmin); /* recommended min for usleep is 10 us */ \
        int ret__;                                                      \
        might_sleep();                                                  \
        for (;;) {                                                      \
                const bool expired__ = ktime_after(ktime_get_raw(), end__); \
                OP;                                                     \
                /* Guarantee COND check prior to timeout */             \
                barrier();                                              \
                if (COND) {                                             \
                        ret__ = 0;                                      \
                        break;                                          \
                }                                                       \
                if (expired__) {                                        \
                        ret__ = -ETIMEDOUT;                             \
                        break;                                          \
                }                                                       \
                usleep_range(wait__, wait__ * 2);                       \
                if (wait__ < (Wmax))                                    \
                        wait__ <<= 1;                                   \
        }                                                               \
        ret__;                                                          \
})

#define _wait_for(COND, US, Wmin, Wmax) __wait_for(, (COND), (US), (Wmin), \
                                                   (Wmax))
#define wait_for(COND, MS)              _wait_for((COND), (MS) * 1000, 10, 1000)

/* vc4_bo.c */
struct drm_gem_object *vc4_create_object(struct drm_device *dev, size_t size);
struct vc4_bo *vc4_bo_create(struct drm_device *dev, size_t size,
                             bool from_cache, enum vc4_kernel_bo_type type);
int vc4_bo_dumb_create(struct drm_file *file_priv,
                       struct drm_device *dev,
                       struct drm_mode_create_dumb *args);
int vc4_create_bo_ioctl(struct drm_device *dev, void *data,
                        struct drm_file *file_priv);
int vc4_create_shader_bo_ioctl(struct drm_device *dev, void *data,
                               struct drm_file *file_priv);
int vc4_mmap_bo_ioctl(struct drm_device *dev, void *data,
                      struct drm_file *file_priv);
int vc4_set_tiling_ioctl(struct drm_device *dev, void *data,
                         struct drm_file *file_priv);
int vc4_get_tiling_ioctl(struct drm_device *dev, void *data,
                         struct drm_file *file_priv);
int vc4_get_hang_state_ioctl(struct drm_device *dev, void *data,
                             struct drm_file *file_priv);
int vc4_label_bo_ioctl(struct drm_device *dev, void *data,
                       struct drm_file *file_priv);
int vc4_bo_cache_init(struct drm_device *dev);
int vc4_bo_inc_usecnt(struct vc4_bo *bo);
void vc4_bo_dec_usecnt(struct vc4_bo *bo);
void vc4_bo_add_to_purgeable_pool(struct vc4_bo *bo);
void vc4_bo_remove_from_purgeable_pool(struct vc4_bo *bo);
int vc4_bo_debugfs_init(struct drm_minor *minor);

/* vc4_crtc.c */
extern struct platform_driver vc4_crtc_driver;
int vc4_crtc_disable_at_boot(struct drm_crtc *crtc);
int __vc4_crtc_init(struct drm_device *drm, struct platform_device *pdev,
                    struct vc4_crtc *vc4_crtc, const struct vc4_crtc_data *data,
                    struct drm_plane *primary_plane,
                    const struct drm_crtc_funcs *crtc_funcs,
                    const struct drm_crtc_helper_funcs *crtc_helper_funcs,
                    bool feeds_txp);
int vc4_crtc_init(struct drm_device *drm, struct platform_device *pdev,
                  struct vc4_crtc *vc4_crtc, const struct vc4_crtc_data *data,
                  const struct drm_crtc_funcs *crtc_funcs,
                  const struct drm_crtc_helper_funcs *crtc_helper_funcs,
                  bool feeds_txp);
int vc4_page_flip(struct drm_crtc *crtc,
                  struct drm_framebuffer *fb,
                  struct drm_pending_vblank_event *event,
                  uint32_t flags,
                  struct drm_modeset_acquire_ctx *ctx);
int vc4_crtc_atomic_check(struct drm_crtc *crtc,
                          struct drm_atomic_state *state);
struct drm_crtc_state *vc4_crtc_duplicate_state(struct drm_crtc *crtc);
void vc4_crtc_destroy_state(struct drm_crtc *crtc,
                            struct drm_crtc_state *state);
void vc4_crtc_reset(struct drm_crtc *crtc);
void vc4_crtc_handle_vblank(struct vc4_crtc *crtc);
void vc4_crtc_send_vblank(struct drm_crtc *crtc);
int vc4_crtc_late_register(struct drm_crtc *crtc);
void vc4_crtc_get_margins(struct drm_crtc_state *state,
                          unsigned int *left, unsigned int *right,
                          unsigned int *top, unsigned int *bottom);

/* vc4_debugfs.c */
void vc4_debugfs_init(struct drm_minor *minor);
#ifdef CONFIG_DEBUG_FS
void vc4_debugfs_add_regset32(struct drm_device *drm,
                              const char *filename,
                              struct debugfs_regset32 *regset);
#else

static inline void vc4_debugfs_add_regset32(struct drm_device *drm,
                                            const char *filename,
                                            struct debugfs_regset32 *regset)
{}
#endif

/* vc4_drv.c */
void __iomem *vc4_ioremap_regs(struct platform_device *dev, int index);
int vc4_dumb_fixup_args(struct drm_mode_create_dumb *args);

/* vc4_dpi.c */
extern struct platform_driver vc4_dpi_driver;

/* vc4_dsi.c */
extern struct platform_driver vc4_dsi_driver;

/* vc4_fence.c */
extern const struct dma_fence_ops vc4_fence_ops;

/* vc4_gem.c */
int vc4_gem_init(struct drm_device *dev);
int vc4_submit_cl_ioctl(struct drm_device *dev, void *data,
                        struct drm_file *file_priv);
int vc4_wait_seqno_ioctl(struct drm_device *dev, void *data,
                         struct drm_file *file_priv);
int vc4_wait_bo_ioctl(struct drm_device *dev, void *data,
                      struct drm_file *file_priv);
void vc4_submit_next_bin_job(struct drm_device *dev);
void vc4_submit_next_render_job(struct drm_device *dev);
void vc4_move_job_to_render(struct drm_device *dev, struct vc4_exec_info *exec);
int vc4_wait_for_seqno(struct drm_device *dev, uint64_t seqno,
                       uint64_t timeout_ns, bool interruptible);
void vc4_job_handle_completed(struct vc4_dev *vc4);
int vc4_gem_madvise_ioctl(struct drm_device *dev, void *data,
                          struct drm_file *file_priv);

/* vc4_hdmi.c */
extern struct platform_driver vc4_hdmi_driver;

/* vc4_vec.c */
extern struct platform_driver vc4_vec_driver;

/* vc4_txp.c */
extern struct platform_driver vc4_txp_driver;

/* vc4_irq.c */
void vc4_irq_enable(struct drm_device *dev);
void vc4_irq_disable(struct drm_device *dev);
int vc4_irq_install(struct drm_device *dev, int irq);
void vc4_irq_uninstall(struct drm_device *dev);
void vc4_irq_reset(struct drm_device *dev);

/* vc4_hvs.c */
extern struct platform_driver vc4_hvs_driver;
struct vc4_hvs *__vc4_hvs_alloc(struct vc4_dev *vc4,
                                void __iomem *regs,
                                struct platform_device *pdev);
void vc4_hvs_stop_channel(struct vc4_hvs *hvs, unsigned int output);
int vc4_hvs_get_fifo_from_output(struct vc4_hvs *hvs, unsigned int output);
u8 vc4_hvs_get_fifo_frame_count(struct vc4_hvs *hvs, unsigned int fifo);
int vc4_hvs_atomic_check(struct drm_crtc *crtc, struct drm_atomic_state *state);
void vc4_hvs_atomic_begin(struct drm_crtc *crtc, struct drm_atomic_state *state);
void vc4_hvs_atomic_enable(struct drm_crtc *crtc, struct drm_atomic_state *state);
void vc4_hvs_atomic_disable(struct drm_crtc *crtc, struct drm_atomic_state *state);
void vc4_hvs_atomic_flush(struct drm_crtc *crtc, struct drm_atomic_state *state);
void vc4_hvs_dump_state(struct vc4_hvs *hvs);
void vc4_hvs_unmask_underrun(struct vc4_hvs *hvs, int channel);
void vc4_hvs_mask_underrun(struct vc4_hvs *hvs, int channel);
int vc4_hvs_debugfs_init(struct drm_minor *minor);

/* vc4_kms.c */
int vc4_kms_load(struct drm_device *dev);

/* vc4_plane.c */
struct drm_plane *vc4_plane_init(struct drm_device *dev,
                                 enum drm_plane_type type,
                                 uint32_t possible_crtcs);
int vc4_plane_create_additional_planes(struct drm_device *dev);
u32 vc4_plane_write_dlist(struct drm_plane *plane, u32 __iomem *dlist);
u32 vc4_plane_dlist_size(const struct drm_plane_state *state);
void vc4_plane_async_set_fb(struct drm_plane *plane,
                            struct drm_framebuffer *fb);

/* vc4_v3d.c */
extern struct platform_driver vc4_v3d_driver;
extern const struct of_device_id vc4_v3d_dt_match[];
int vc4_v3d_get_bin_slot(struct vc4_dev *vc4);
int vc4_v3d_bin_bo_get(struct vc4_dev *vc4, bool *used);
void vc4_v3d_bin_bo_put(struct vc4_dev *vc4);
int vc4_v3d_pm_get(struct vc4_dev *vc4);
void vc4_v3d_pm_put(struct vc4_dev *vc4);
int vc4_v3d_debugfs_init(struct drm_minor *minor);

/* vc4_validate.c */
int
vc4_validate_bin_cl(struct drm_device *dev,
                    void *validated,
                    void *unvalidated,
                    struct vc4_exec_info *exec);

int
vc4_validate_shader_recs(struct drm_device *dev, struct vc4_exec_info *exec);

struct drm_gem_dma_object *vc4_use_bo(struct vc4_exec_info *exec,
                                      uint32_t hindex);

int vc4_get_rcl(struct drm_device *dev, struct vc4_exec_info *exec);

bool vc4_check_tex_size(struct vc4_exec_info *exec,
                        struct drm_gem_dma_object *fbo,
                        uint32_t offset, uint8_t tiling_format,
                        uint32_t width, uint32_t height, uint8_t cpp);

/* vc4_validate_shader.c */
struct vc4_validated_shader_info *
vc4_validate_shader(struct drm_gem_dma_object *shader_obj);

/* vc4_perfmon.c */
void vc4_perfmon_get(struct vc4_perfmon *perfmon);
void vc4_perfmon_put(struct vc4_perfmon *perfmon);
void vc4_perfmon_start(struct vc4_dev *vc4, struct vc4_perfmon *perfmon);
void vc4_perfmon_stop(struct vc4_dev *vc4, struct vc4_perfmon *perfmon,
                      bool capture);
struct vc4_perfmon *vc4_perfmon_find(struct vc4_file *vc4file, int id);
void vc4_perfmon_open_file(struct vc4_file *vc4file);
void vc4_perfmon_close_file(struct vc4_file *vc4file);
int vc4_perfmon_create_ioctl(struct drm_device *dev, void *data,
                             struct drm_file *file_priv);
int vc4_perfmon_destroy_ioctl(struct drm_device *dev, void *data,
                              struct drm_file *file_priv);
int vc4_perfmon_get_values_ioctl(struct drm_device *dev, void *data,
                                 struct drm_file *file_priv);

#endif /* _VC4_DRV_H_ */