/*
 * Copyright (c) 2016-2018, The Linux Foundation. All rights reserved.
 * Copyright (C) 2013 Red Hat
 * Author: Rob Clark <robdclark@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef __MSM_DRV_H__
#define __MSM_DRV_H__

#include <linux/kernel.h>
#include <linux/clk.h>
#include <linux/cpufreq.h>
#include <linux/module.h>
#include <linux/component.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <linux/list.h>
#include <linux/iommu.h>
#include <linux/types.h>
#include <linux/of_graph.h>
#include <linux/of_device.h>
#include <asm/sizes.h>
#include <linux/kthread.h>

#include <drm/drmP.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_plane_helper.h>
#include <drm/drm_fb_helper.h>
#include <drm/msm_drm.h>
#include <drm/drm_gem.h>

struct msm_kms;
struct msm_gpu;
struct msm_mmu;
struct msm_mdss;
struct msm_rd_state;
struct msm_perf_state;
struct msm_gem_submit;
struct msm_fence_context;
struct msm_gem_address_space;
struct msm_gem_vma;

#define MAX_CRTCS      8
#define MAX_PLANES     20
#define MAX_ENCODERS   8
#define MAX_BRIDGES    8
#define MAX_CONNECTORS 8

#define FRAC_16_16(mult, div)    (((mult) << 16) / (div))

struct msm_file_private {
	rwlock_t queuelock;
	struct list_head submitqueues;
	int queueid;
};

enum msm_mdp_plane_property {
	PLANE_PROP_ZPOS,
	PLANE_PROP_ALPHA,
	PLANE_PROP_PREMULTIPLIED,
	PLANE_PROP_MAX_NUM
};

struct msm_vblank_ctrl {
	struct kthread_work work;
	struct list_head event_list;
	spinlock_t lock;
};

#define MSM_GPU_MAX_RINGS 4
#define MAX_H_TILES_PER_DISPLAY 2

/**
 * enum msm_display_caps - features/capabilities supported by displays
 * @MSM_DISPLAY_CAP_VID_MODE:           Video or "active" mode supported
 * @MSM_DISPLAY_CAP_CMD_MODE:           Command mode supported
 * @MSM_DISPLAY_CAP_HOT_PLUG:           Hot plug detection supported
 * @MSM_DISPLAY_CAP_EDID:               EDID supported
 */
enum msm_display_caps {
	MSM_DISPLAY_CAP_VID_MODE	= BIT(0),
	MSM_DISPLAY_CAP_CMD_MODE	= BIT(1),
	MSM_DISPLAY_CAP_HOT_PLUG	= BIT(2),
	MSM_DISPLAY_CAP_EDID		= BIT(3),
};

/**
 * enum msm_event_wait - type of HW events to wait for
 * @MSM_ENC_COMMIT_DONE - wait for the driver to flush the registers to HW
 * @MSM_ENC_TX_COMPLETE - wait for the HW to transfer the frame to panel
 * @MSM_ENC_VBLANK - wait for the HW VBLANK event (for driver-internal waiters)
 */
enum msm_event_wait {
	MSM_ENC_COMMIT_DONE = 0,
	MSM_ENC_TX_COMPLETE,
	MSM_ENC_VBLANK,
};

/**
 * struct msm_display_topology - defines a display topology pipeline
 * @num_lm:       number of layer mixers used
 * @num_enc:      number of compression encoder blocks used
 * @num_intf:     number of interfaces the panel is mounted on
 */
struct msm_display_topology {
	u32 num_lm;
	u32 num_enc;
	u32 num_intf;
};

/**
 * struct msm_display_info - defines display properties
 * @intf_type:          DRM_MODE_CONNECTOR_ display type
 * @capabilities:       Bitmask of display flags
 * @num_of_h_tiles:     Number of horizontal tiles in case of split interface
 * @h_tile_instance:    Controller instance used per tile. Number of elements is
 *                      based on num_of_h_tiles
 * @is_te_using_watchdog_timer:  Boolean to indicate watchdog TE is
 *				 used instead of panel TE in cmd mode panels
 */
struct msm_display_info {
	int intf_type;
	uint32_t capabilities;
	uint32_t num_of_h_tiles;
	uint32_t h_tile_instance[MAX_H_TILES_PER_DISPLAY];
	bool is_te_using_watchdog_timer;
};

/* Commit/Event thread specific structure */
struct msm_drm_thread {
	struct drm_device *dev;
	struct task_struct *thread;
	unsigned int crtc_id;
	struct kthread_worker worker;
};

struct msm_drm_private {

	struct drm_device *dev;

	struct msm_kms *kms;

	/* subordinate devices, if present: */
	struct platform_device *gpu_pdev;

	/* top level MDSS wrapper device (for MDP5/DPU only) */
	struct msm_mdss *mdss;

	/* possibly this should be in the kms component, but it is
	 * shared by both mdp4 and mdp5..
	 */
	struct hdmi *hdmi;

	/* eDP is for mdp5 only, but kms has not been created
	 * when edp_bind() and edp_init() are called. Here is the only
	 * place to keep the edp instance.
	 */
	struct msm_edp *edp;

	/* DSI is shared by mdp4 and mdp5 */
	struct msm_dsi *dsi[2];

	/* when we have more than one 'msm_gpu' these need to be an array: */
	struct msm_gpu *gpu;
	struct msm_file_private *lastctx;
	/* gpu is only set on open(), but we need this info earlier */
	bool is_a2xx;

	struct drm_fb_helper *fbdev;

	struct msm_rd_state *rd;       /* debugfs to dump all submits */
	struct msm_rd_state *hangrd;   /* debugfs to dump hanging submits */
	struct msm_perf_state *perf;

	/* list of GEM objects: */
	struct list_head inactive_list;

	struct workqueue_struct *wq;

	unsigned int num_planes;
	struct drm_plane *planes[MAX_PLANES];

	unsigned int num_crtcs;
	struct drm_crtc *crtcs[MAX_CRTCS];

	struct msm_drm_thread disp_thread[MAX_CRTCS];
	struct msm_drm_thread event_thread[MAX_CRTCS];

	unsigned int num_encoders;
	struct drm_encoder *encoders[MAX_ENCODERS];

	unsigned int num_bridges;
	struct drm_bridge *bridges[MAX_BRIDGES];

	unsigned int num_connectors;
	struct drm_connector *connectors[MAX_CONNECTORS];

	/* Properties */
	struct drm_property *plane_property[PLANE_PROP_MAX_NUM];

	/* VRAM carveout, used when no IOMMU: */
	struct {
		unsigned long size;
		dma_addr_t paddr;
		/* NOTE: mm managed at the page level, size is in # of pages
		 * and position mm_node->start is in # of pages:
		 */
		struct drm_mm mm;
		spinlock_t lock; /* Protects drm_mm node allocation/removal */
	} vram;

	struct notifier_block vmap_notifier;
	struct shrinker shrinker;

	struct msm_vblank_ctrl vblank_ctrl;
	struct drm_atomic_state *pm_state;
};

struct msm_format {
	uint32_t pixel_format;
};

int msm_atomic_prepare_fb(struct drm_plane *plane,
			  struct drm_plane_state *new_state);
void msm_atomic_commit_tail(struct drm_atomic_state *state);
struct drm_atomic_state *msm_atomic_state_alloc(struct drm_device *dev);
void msm_atomic_state_clear(struct drm_atomic_state *state);
void msm_atomic_state_free(struct drm_atomic_state *state);

int msm_gem_init_vma(struct msm_gem_address_space *aspace,
		struct msm_gem_vma *vma, int npages);
void msm_gem_purge_vma(struct msm_gem_address_space *aspace,
		struct msm_gem_vma *vma);
void msm_gem_unmap_vma(struct msm_gem_address_space *aspace,
		struct msm_gem_vma *vma);
int msm_gem_map_vma(struct msm_gem_address_space *aspace,
		struct msm_gem_vma *vma, int prot,
		struct sg_table *sgt, int npages);
void msm_gem_close_vma(struct msm_gem_address_space *aspace,
		struct msm_gem_vma *vma);

void msm_gem_address_space_put(struct msm_gem_address_space *aspace);

struct msm_gem_address_space *
msm_gem_address_space_create(struct device *dev, struct iommu_domain *domain,
		const char *name);

struct msm_gem_address_space *
msm_gem_address_space_create_a2xx(struct device *dev, struct msm_gpu *gpu,
		const char *name, uint64_t va_start, uint64_t va_end);

int msm_register_mmu(struct drm_device *dev, struct msm_mmu *mmu);
void msm_unregister_mmu(struct drm_device *dev, struct msm_mmu *mmu);

bool msm_use_mmu(struct drm_device *dev);

void msm_gem_submit_free(struct msm_gem_submit *submit);
int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
		struct drm_file *file);

void msm_gem_shrinker_init(struct drm_device *dev);
void msm_gem_shrinker_cleanup(struct drm_device *dev);

int msm_gem_mmap_obj(struct drm_gem_object *obj,
			struct vm_area_struct *vma);
int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
vm_fault_t msm_gem_fault(struct vm_fault *vmf);
uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj);
int msm_gem_get_iova(struct drm_gem_object *obj,
		struct msm_gem_address_space *aspace, uint64_t *iova);
int msm_gem_get_and_pin_iova(struct drm_gem_object *obj,
		struct msm_gem_address_space *aspace, uint64_t *iova);
uint64_t msm_gem_iova(struct drm_gem_object *obj,
		struct msm_gem_address_space *aspace);
void msm_gem_unpin_iova(struct drm_gem_object *obj,
		struct msm_gem_address_space *aspace);
struct page **msm_gem_get_pages(struct drm_gem_object *obj);
void msm_gem_put_pages(struct drm_gem_object *obj);
int msm_gem_dumb_create(struct drm_file *file, struct drm_device *dev,
		struct drm_mode_create_dumb *args);
int msm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev,
		uint32_t handle, uint64_t *offset);
struct sg_table *msm_gem_prime_get_sg_table(struct drm_gem_object *obj);
void *msm_gem_prime_vmap(struct drm_gem_object *obj);
void msm_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
int msm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma);
struct reservation_object *msm_gem_prime_res_obj(struct drm_gem_object *obj);
struct drm_gem_object *msm_gem_prime_import_sg_table(struct drm_device *dev,
		struct dma_buf_attachment *attach, struct sg_table *sg);
int msm_gem_prime_pin(struct drm_gem_object *obj);
void msm_gem_prime_unpin(struct drm_gem_object *obj);
void *msm_gem_get_vaddr(struct drm_gem_object *obj);
void *msm_gem_get_vaddr_active(struct drm_gem_object *obj);
void msm_gem_put_vaddr(struct drm_gem_object *obj);
int msm_gem_madvise(struct drm_gem_object *obj, unsigned madv);
int msm_gem_sync_object(struct drm_gem_object *obj,
		struct msm_fence_context *fctx, bool exclusive);
void msm_gem_move_to_active(struct drm_gem_object *obj,
		struct msm_gpu *gpu, bool exclusive, struct dma_fence *fence);
void msm_gem_move_to_inactive(struct drm_gem_object *obj);
int msm_gem_cpu_prep(struct drm_gem_object *obj, uint32_t op, ktime_t *timeout);
int msm_gem_cpu_fini(struct drm_gem_object *obj);
void msm_gem_free_object(struct drm_gem_object *obj);
int msm_gem_new_handle(struct drm_device *dev, struct drm_file *file,
		uint32_t size, uint32_t flags, uint32_t *handle, char *name);
struct drm_gem_object *msm_gem_new(struct drm_device *dev,
		uint32_t size, uint32_t flags);
struct drm_gem_object *msm_gem_new_locked(struct drm_device *dev,
		uint32_t size, uint32_t flags);
void *msm_gem_kernel_new(struct drm_device *dev, uint32_t size,
		uint32_t flags, struct msm_gem_address_space *aspace,
		struct drm_gem_object **bo, uint64_t *iova);
void *msm_gem_kernel_new_locked(struct drm_device *dev, uint32_t size,
		uint32_t flags, struct msm_gem_address_space *aspace,
		struct drm_gem_object **bo, uint64_t *iova);
void msm_gem_kernel_put(struct drm_gem_object *bo,
		struct msm_gem_address_space *aspace, bool locked);
struct drm_gem_object *msm_gem_import(struct drm_device *dev,
		struct dma_buf *dmabuf, struct sg_table *sgt);

__printf(2, 3)
void msm_gem_object_set_name(struct drm_gem_object *bo, const char *fmt, ...);

int msm_framebuffer_prepare(struct drm_framebuffer *fb,
		struct msm_gem_address_space *aspace);
void msm_framebuffer_cleanup(struct drm_framebuffer *fb,
		struct msm_gem_address_space *aspace);
uint32_t msm_framebuffer_iova(struct drm_framebuffer *fb,
		struct msm_gem_address_space *aspace, int plane);
struct drm_gem_object *msm_framebuffer_bo(struct drm_framebuffer *fb, int plane);
const struct msm_format *msm_framebuffer_format(struct drm_framebuffer *fb);
struct drm_framebuffer *msm_framebuffer_create(struct drm_device *dev,
		struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd);
struct drm_framebuffer * msm_alloc_stolen_fb(struct drm_device *dev,
		int w, int h, int p, uint32_t format);

struct drm_fb_helper *msm_fbdev_init(struct drm_device *dev);
void msm_fbdev_free(struct drm_device *dev);

struct hdmi;
int msm_hdmi_modeset_init(struct hdmi *hdmi, struct drm_device *dev,
		struct drm_encoder *encoder);
void __init msm_hdmi_register(void);
void __exit msm_hdmi_unregister(void);

struct msm_edp;
void __init msm_edp_register(void);
void __exit msm_edp_unregister(void);
int msm_edp_modeset_init(struct msm_edp *edp, struct drm_device *dev,
		struct drm_encoder *encoder);

struct msm_dsi;
#ifdef CONFIG_DRM_MSM_DSI
void __init msm_dsi_register(void);
void __exit msm_dsi_unregister(void);
int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device *dev,
			 struct drm_encoder *encoder);
#else
static inline void __init msm_dsi_register(void)
{
}
static inline void __exit msm_dsi_unregister(void)
{
}
static inline int msm_dsi_modeset_init(struct msm_dsi *msm_dsi,
				       struct drm_device *dev,
				       struct drm_encoder *encoder)
{
	return -EINVAL;
}
#endif

void __init msm_mdp_register(void);
void __exit msm_mdp_unregister(void);
void __init msm_dpu_register(void);
void __exit msm_dpu_unregister(void);

#ifdef CONFIG_DEBUG_FS
void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m);
void msm_gem_describe_objects(struct list_head *list, struct seq_file *m);
void msm_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m);
int msm_debugfs_late_init(struct drm_device *dev);
int msm_rd_debugfs_init(struct drm_minor *minor);
void msm_rd_debugfs_cleanup(struct msm_drm_private *priv);
__printf(3, 4)
void msm_rd_dump_submit(struct msm_rd_state *rd, struct msm_gem_submit *submit,
		const char *fmt, ...);
int msm_perf_debugfs_init(struct drm_minor *minor);
void msm_perf_debugfs_cleanup(struct msm_drm_private *priv);
#else
static inline int msm_debugfs_late_init(struct drm_device *dev) { return 0; }
__printf(3, 4)
static inline void msm_rd_dump_submit(struct msm_rd_state *rd, struct msm_gem_submit *submit,
		const char *fmt, ...) {}
static inline void msm_rd_debugfs_cleanup(struct msm_drm_private *priv) {}
static inline void msm_perf_debugfs_cleanup(struct msm_drm_private *priv) {}
#endif

struct clk *msm_clk_get(struct platform_device *pdev, const char *name);
int msm_clk_bulk_get(struct device *dev, struct clk_bulk_data **bulk);

struct clk *msm_clk_bulk_get_clock(struct clk_bulk_data *bulk, int count,
	const char *name);
void __iomem *msm_ioremap(struct platform_device *pdev, const char *name,
		const char *dbgname);
void msm_writel(u32 data, void __iomem *addr);
u32 msm_readl(const void __iomem *addr);

struct msm_gpu_submitqueue;
int msm_submitqueue_init(struct drm_device *drm, struct msm_file_private *ctx);
struct msm_gpu_submitqueue *msm_submitqueue_get(struct msm_file_private *ctx,
		u32 id);
int msm_submitqueue_create(struct drm_device *drm, struct msm_file_private *ctx,
		u32 prio, u32 flags, u32 *id);
int msm_submitqueue_remove(struct msm_file_private *ctx, u32 id);
void msm_submitqueue_close(struct msm_file_private *ctx);

void msm_submitqueue_destroy(struct kref *kref);


#define DBG(fmt, ...) DRM_DEBUG_DRIVER(fmt"\n", ##__VA_ARGS__)
#define VERB(fmt, ...) if (0) DRM_DEBUG_DRIVER(fmt"\n", ##__VA_ARGS__)

static inline int align_pitch(int width, int bpp)
{
	int bytespp = (bpp + 7) / 8;
	/* adreno needs pitch aligned to 32 pixels: */
	return bytespp * ALIGN(width, 32);
}

/* for the generated headers: */
#define INVALID_IDX(idx) ({BUG(); 0;})
#define fui(x)                ({BUG(); 0;})
#define util_float_to_half(x) ({BUG(); 0;})


#define FIELD(val, name) (((val) & name ## __MASK) >> name ## __SHIFT)

/* for conditionally setting boolean flag(s): */
#define COND(bool, val) ((bool) ? (val) : 0)

static inline unsigned long timeout_to_jiffies(const ktime_t *timeout)
{
	ktime_t now = ktime_get();
	unsigned long remaining_jiffies;

	if (ktime_compare(*timeout, now) < 0) {
		remaining_jiffies = 0;
	} else {
		ktime_t rem = ktime_sub(*timeout, now);
		struct timespec ts = ktime_to_timespec(rem);
		remaining_jiffies = timespec_to_jiffies(&ts);
	}

	return remaining_jiffies;
}

#endif /* __MSM_DRV_H__ */