drivers/gpu/msm/adreno_drawctxt.h

/* Copyright (c) 2002,2007-2013, The Linux Foundation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 and
 * only 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.
 *
 */
#ifndef __ADRENO_DRAWCTXT_H
#define __ADRENO_DRAWCTXT_H

#include <linux/sched.h>

#include "adreno_pm4types.h"
#include "a2xx_reg.h"

/* Flags */

#define CTXT_FLAGS_NOT_IN_USE		0x00000000
#define CTXT_FLAGS_IN_USE		BIT(0)

/* state shadow memory allocated */
#define CTXT_FLAGS_STATE_SHADOW		BIT(1)

/* gmem shadow memory allocated */
#define CTXT_FLAGS_GMEM_SHADOW		BIT(2)
/* gmem must be copied to shadow */
#define CTXT_FLAGS_GMEM_SAVE		BIT(3)
/* gmem can be restored from shadow */
#define CTXT_FLAGS_GMEM_RESTORE		BIT(4)
/* preamble packed in cmdbuffer for context switching */
#define CTXT_FLAGS_PREAMBLE		BIT(5)
/* shader must be copied to shadow */
#define CTXT_FLAGS_SHADER_SAVE		BIT(6)
/* shader can be restored from shadow */
#define CTXT_FLAGS_SHADER_RESTORE	BIT(7)
/* Context has caused a GPU hang */
#define CTXT_FLAGS_GPU_HANG		BIT(8)
/* Specifies there is no need to save GMEM */
#define CTXT_FLAGS_NOGMEMALLOC          BIT(9)
/* Trash state for context */
#define CTXT_FLAGS_TRASHSTATE		BIT(10)
/* per context timestamps enabled */
#define CTXT_FLAGS_PER_CONTEXT_TS	BIT(11)
/* Context has caused a GPU hang and fault tolerance successful */
#define CTXT_FLAGS_GPU_HANG_FT	BIT(12)
/* Context is being destroyed so dont save it */
#define CTXT_FLAGS_BEING_DESTROYED	BIT(13)
/* User mode generated timestamps enabled */
#define CTXT_FLAGS_USER_GENERATED_TS    BIT(14)
/* Context skip till EOF */
#define CTXT_FLAGS_SKIP_EOF             BIT(15)
/* Context no fault tolerance */
#define CTXT_FLAGS_NO_FAULT_TOLERANCE  BIT(16)

struct kgsl_device;
struct adreno_device;
struct kgsl_device_private;
struct kgsl_context;

/* draw context */
struct gmem_shadow_t {
	struct kgsl_memdesc gmemshadow;	/* Shadow buffer address */

	/*
	 * 256 KB GMEM surface = 4 bytes-per-pixel x 256 pixels/row x
	 * 256 rows. Width & height must be multiples of 32 in case tiled
	 * textures are used
	*/

	enum COLORFORMATX format; /* Unused on A3XX */
	unsigned int size;	/* Size of surface used to store GMEM */
	unsigned int width;	/* Width of surface used to store GMEM */
	unsigned int height;	/* Height of surface used to store GMEM */
	unsigned int pitch;	/* Pitch of surface used to store GMEM */
	unsigned int gmem_pitch;	/* Pitch value used for GMEM */
	unsigned int *gmem_save_commands;    /* Unused on A3XX */
	unsigned int *gmem_restore_commands; /* Unused on A3XX */
	unsigned int gmem_save[3];
	unsigned int gmem_restore[3];
	struct kgsl_memdesc quad_vertices;
	struct kgsl_memdesc quad_texcoords;
	struct kgsl_memdesc quad_vertices_restore;
};

struct adreno_context {
	pid_t pid;
	char pid_name[TASK_COMM_LEN];
	unsigned int id;
	unsigned int ib_gpu_time_used;
	uint32_t flags;
	uint32_t pagefault;
	unsigned long pagefault_ts;
	struct kgsl_pagetable *pagetable;
	struct kgsl_memdesc gpustate;
	unsigned int reg_restore[3];
	unsigned int shader_save[3];
	unsigned int shader_restore[3];

	/* Information of the GMEM shadow that is created in context create */
	struct gmem_shadow_t context_gmem_shadow;

	/* A2XX specific items */
	unsigned int reg_save[3];
	unsigned int shader_fixup[3];
	unsigned int chicken_restore[3];
	unsigned int bin_base_offset;

	/* A3XX specific items */
	unsigned int regconstant_save[3];
	unsigned int constant_restore[3];
	unsigned int hlsqcontrol_restore[3];
	unsigned int save_fixup[3];
	unsigned int restore_fixup[3];
	struct kgsl_memdesc shader_load_commands[2];
	struct kgsl_memdesc shader_save_commands[4];
	struct kgsl_memdesc constant_save_commands[3];
	struct kgsl_memdesc constant_load_commands[3];
	struct kgsl_memdesc cond_execs[4];
	struct kgsl_memdesc hlsqcontrol_restore_commands[1];
};

int adreno_drawctxt_create(struct kgsl_device *device,
			struct kgsl_pagetable *pagetable,
			struct kgsl_context *context,
			uint32_t flags);

void adreno_drawctxt_destroy(struct kgsl_device *device,
			  struct kgsl_context *context);

void adreno_drawctxt_switch(struct adreno_device *adreno_dev,
				struct adreno_context *drawctxt,
				unsigned int flags);
void adreno_drawctxt_set_bin_base_offset(struct kgsl_device *device,
					struct kgsl_context *context,
					unsigned int offset);

/* GPU context switch helper functions */

void build_quad_vtxbuff(struct adreno_context *drawctxt,
		struct gmem_shadow_t *shadow, unsigned int **incmd);

unsigned int uint2float(unsigned int);

static inline unsigned int virt2gpu(unsigned int *cmd,
				    struct kgsl_memdesc *memdesc)
{
	return memdesc->gpuaddr + ((char *) cmd - (char *) memdesc->hostptr);
}

static inline void create_ib1(struct adreno_context *drawctxt,
			      unsigned int *cmd,
			      unsigned int *start,
			      unsigned int *end)
{
	cmd[0] = CP_HDR_INDIRECT_BUFFER_PFD;
	cmd[1] = virt2gpu(start, &drawctxt->gpustate);
	cmd[2] = end - start;
}


static inline unsigned int *reg_range(unsigned int *cmd, unsigned int start,
	unsigned int end)
{
	*cmd++ = CP_REG(start);		/* h/w regs, start addr */
	*cmd++ = end - start + 1;	/* count */
	return cmd;
}

static inline void calc_gmemsize(struct gmem_shadow_t *shadow, int gmem_size)
{
	int w = 64, h = 64;

	shadow->format = COLORX_8_8_8_8;

	/* convert from bytes to 32-bit words */
	gmem_size = (gmem_size + 3) / 4;

	while ((w * h) < gmem_size) {
		if (w < h)
			w *= 2;
		else
			h *= 2;
	}

	shadow->pitch = shadow->width = w;
	shadow->height = h;
	shadow->gmem_pitch = shadow->pitch;
	shadow->size = shadow->pitch * shadow->height * 4;
}

#endif  /* __ADRENO_DRAWCTXT_H */