drivers/gpu/drm/msm/adreno/a4xx_gpu.c - linux-mtk - Git at Google

 /* Copyright (c) 2014 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.
  *
  */
 #include "a4xx_gpu.h"
 #ifdef CONFIG_MSM_OCMEM
 #  include <soc/qcom/ocmem.h>
 #endif

 #define A4XX_INT0_MASK \
 	(A4XX_INT0_RBBM_AHB_ERROR |        \
 	 A4XX_INT0_RBBM_ATB_BUS_OVERFLOW | \
 	 A4XX_INT0_CP_T0_PACKET_IN_IB |    \
 	 A4XX_INT0_CP_OPCODE_ERROR |       \
 	 A4XX_INT0_CP_RESERVED_BIT_ERROR | \
 	 A4XX_INT0_CP_HW_FAULT |           \
 	 A4XX_INT0_CP_IB1_INT |            \
 	 A4XX_INT0_CP_IB2_INT |            \
 	 A4XX_INT0_CP_RB_INT |             \
 	 A4XX_INT0_CP_REG_PROTECT_FAULT |  \
 	 A4XX_INT0_CP_AHB_ERROR_HALT |     \
 	 A4XX_INT0_CACHE_FLUSH_TS |        \
 	 A4XX_INT0_UCHE_OOB_ACCESS)

 extern bool hang_debug;
 static void a4xx_dump(struct msm_gpu *gpu);
 static bool a4xx_idle(struct msm_gpu *gpu);

 /*
  * a4xx_enable_hwcg() - Program the clock control registers
  * @device: The adreno device pointer
  */
 static void a4xx_enable_hwcg(struct msm_gpu *gpu)
 {
 	struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
 	unsigned int i;
 	for (i = 0; i < 4; i++)
 		gpu_write(gpu, REG_A4XX_RBBM_CLOCK_CTL_TP(i), 0x02222202);
 	for (i = 0; i < 4; i++)
 		gpu_write(gpu, REG_A4XX_RBBM_CLOCK_CTL2_TP(i), 0x00002222);
 	for (i = 0; i < 4; i++)
 		gpu_write(gpu, REG_A4XX_RBBM_CLOCK_HYST_TP(i), 0x0E739CE7);
 	for (i = 0; i < 4; i++)
 		gpu_write(gpu, REG_A4XX_RBBM_CLOCK_DELAY_TP(i), 0x00111111);
 	for (i = 0; i < 4; i++)
 		gpu_write(gpu, REG_A4XX_RBBM_CLOCK_CTL_SP(i), 0x22222222);
 	for (i = 0; i < 4; i++)
 		gpu_write(gpu, REG_A4XX_RBBM_CLOCK_CTL2_SP(i), 0x00222222);
 	for (i = 0; i < 4; i++)
 		gpu_write(gpu, REG_A4XX_RBBM_CLOCK_HYST_SP(i), 0x00000104);
 	for (i = 0; i < 4; i++)
 		gpu_write(gpu, REG_A4XX_RBBM_CLOCK_DELAY_SP(i), 0x00000081);
 	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_CTL_UCHE, 0x22222222);
 	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_CTL2_UCHE, 0x02222222);
 	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_CTL3_UCHE, 0x00000000);
 	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_CTL4_UCHE, 0x00000000);
 	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_HYST_UCHE, 0x00004444);
 	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_DELAY_UCHE, 0x00001112);
 	for (i = 0; i < 4; i++)
 		gpu_write(gpu, REG_A4XX_RBBM_CLOCK_CTL_RB(i), 0x22222222);

 	/* Disable L1 clocking in A420 due to CCU issues with it */
 	for (i = 0; i < 4; i++) {
 		if (adreno_is_a420(adreno_gpu)) {
 			gpu_write(gpu, REG_A4XX_RBBM_CLOCK_CTL2_RB(i),
 					0x00002020);
 		} else {
 			gpu_write(gpu, REG_A4XX_RBBM_CLOCK_CTL2_RB(i),
 					0x00022020);
 		}
 	}

 	for (i = 0; i < 4; i++) {
 		gpu_write(gpu, REG_A4XX_RBBM_CLOCK_CTL_MARB_CCU(i),
 				0x00000922);
 	}

 	for (i = 0; i < 4; i++) {
 		gpu_write(gpu, REG_A4XX_RBBM_CLOCK_HYST_RB_MARB_CCU(i),
 				0x00000000);
 	}

 	for (i = 0; i < 4; i++) {
 		gpu_write(gpu, REG_A4XX_RBBM_CLOCK_DELAY_RB_MARB_CCU_L1(i),
 				0x00000001);
 	}

 	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_MODE_GPC, 0x02222222);
 	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_HYST_GPC, 0x04100104);
 	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_DELAY_GPC, 0x00022222);
 	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_CTL_COM_DCOM, 0x00000022);
 	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_HYST_COM_DCOM, 0x0000010F);
 	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_DELAY_COM_DCOM, 0x00000022);
 	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_CTL_TSE_RAS_RBBM, 0x00222222);
 	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_HYST_TSE_RAS_RBBM, 0x00004104);
 	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_DELAY_TSE_RAS_RBBM, 0x00000222);
 	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_CTL_HLSQ , 0x00000000);
 	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_HYST_HLSQ, 0x00000000);
 	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_DELAY_HLSQ, 0x00220000);
 	/* Early A430's have a timing issue with SP/TP power collapse;
 	   disabling HW clock gating prevents it. */
 	if (adreno_is_a430(adreno_gpu) && adreno_gpu->rev.patchid < 2)
 		gpu_write(gpu, REG_A4XX_RBBM_CLOCK_CTL, 0);
 	else
 		gpu_write(gpu, REG_A4XX_RBBM_CLOCK_CTL, 0xAAAAAAAA);
 	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_CTL2, 0);
 }


 static bool a4xx_me_init(struct msm_gpu *gpu)
 {
 	struct msm_ringbuffer *ring = gpu->rb[0];

 	OUT_PKT3(ring, CP_ME_INIT, 17);
 	OUT_RING(ring, 0x000003f7);
 	OUT_RING(ring, 0x00000000);
 	OUT_RING(ring, 0x00000000);
 	OUT_RING(ring, 0x00000000);
 	OUT_RING(ring, 0x00000080);
 	OUT_RING(ring, 0x00000100);
 	OUT_RING(ring, 0x00000180);
 	OUT_RING(ring, 0x00006600);
 	OUT_RING(ring, 0x00000150);
 	OUT_RING(ring, 0x0000014e);
 	OUT_RING(ring, 0x00000154);
 	OUT_RING(ring, 0x00000001);
 	OUT_RING(ring, 0x00000000);
 	OUT_RING(ring, 0x00000000);
 	OUT_RING(ring, 0x00000000);
 	OUT_RING(ring, 0x00000000);
 	OUT_RING(ring, 0x00000000);

 	gpu->funcs->flush(gpu, ring);
 	return a4xx_idle(gpu);
 }

 static int a4xx_hw_init(struct msm_gpu *gpu)
 {
 	struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
 	struct a4xx_gpu *a4xx_gpu = to_a4xx_gpu(adreno_gpu);
 	uint32_t *ptr, len;
 	int i, ret;

 	if (adreno_is_a420(adreno_gpu)) {
 		gpu_write(gpu, REG_A4XX_VBIF_ABIT_SORT, 0x0001001F);
 		gpu_write(gpu, REG_A4XX_VBIF_ABIT_SORT_CONF, 0x000000A4);
 		gpu_write(gpu, REG_A4XX_VBIF_GATE_OFF_WRREQ_EN, 0x00000001);
 		gpu_write(gpu, REG_A4XX_VBIF_IN_RD_LIM_CONF0, 0x18181818);
 		gpu_write(gpu, REG_A4XX_VBIF_IN_RD_LIM_CONF1, 0x00000018);
 		gpu_write(gpu, REG_A4XX_VBIF_IN_WR_LIM_CONF0, 0x18181818);
 		gpu_write(gpu, REG_A4XX_VBIF_IN_WR_LIM_CONF1, 0x00000018);
 		gpu_write(gpu, REG_A4XX_VBIF_ROUND_ROBIN_QOS_ARB, 0x00000003);
 	} else if (adreno_is_a430(adreno_gpu)) {
 		gpu_write(gpu, REG_A4XX_VBIF_GATE_OFF_WRREQ_EN, 0x00000001);
 		gpu_write(gpu, REG_A4XX_VBIF_IN_RD_LIM_CONF0, 0x18181818);
 		gpu_write(gpu, REG_A4XX_VBIF_IN_RD_LIM_CONF1, 0x00000018);
 		gpu_write(gpu, REG_A4XX_VBIF_IN_WR_LIM_CONF0, 0x18181818);
 		gpu_write(gpu, REG_A4XX_VBIF_IN_WR_LIM_CONF1, 0x00000018);
 		gpu_write(gpu, REG_A4XX_VBIF_ROUND_ROBIN_QOS_ARB, 0x00000003);
 	} else {
 		BUG();
 	}

 	/* Make all blocks contribute to the GPU BUSY perf counter */
 	gpu_write(gpu, REG_A4XX_RBBM_GPU_BUSY_MASKED, 0xffffffff);

 	/* Tune the hystersis counters for SP and CP idle detection */
 	gpu_write(gpu, REG_A4XX_RBBM_SP_HYST_CNT, 0x10);
 	gpu_write(gpu, REG_A4XX_RBBM_WAIT_IDLE_CLOCKS_CTL, 0x10);

 	if (adreno_is_a430(adreno_gpu)) {
 		gpu_write(gpu, REG_A4XX_RBBM_WAIT_IDLE_CLOCKS_CTL2, 0x30);
 	}

 	 /* Enable the RBBM error reporting bits */
 	gpu_write(gpu, REG_A4XX_RBBM_AHB_CTL0, 0x00000001);

 	/* Enable AHB error reporting*/
 	gpu_write(gpu, REG_A4XX_RBBM_AHB_CTL1, 0xa6ffffff);

 	/* Enable power counters*/
 	gpu_write(gpu, REG_A4XX_RBBM_RBBM_CTL, 0x00000030);

 	/*
 	 * Turn on hang detection - this spews a lot of useful information
 	 * into the RBBM registers on a hang:
 	 */
 	gpu_write(gpu, REG_A4XX_RBBM_INTERFACE_HANG_INT_CTL,
 			(1 << 30) | 0xFFFF);

 	gpu_write(gpu, REG_A4XX_RB_GMEM_BASE_ADDR,
 			(unsigned int)(a4xx_gpu->ocmem_base >> 14));

 	/* Turn on performance counters: */
 	gpu_write(gpu, REG_A4XX_RBBM_PERFCTR_CTL, 0x01);

 	/* use the first CP counter for timestamp queries.. userspace may set
 	 * this as well but it selects the same counter/countable:
 	 */
 	gpu_write(gpu, REG_A4XX_CP_PERFCTR_CP_SEL_0, CP_ALWAYS_COUNT);

 	if (adreno_is_a430(adreno_gpu))
 		gpu_write(gpu, REG_A4XX_UCHE_CACHE_WAYS_VFD, 0x07);

 	/* Disable L2 bypass to avoid UCHE out of bounds errors */
 	gpu_write(gpu, REG_A4XX_UCHE_TRAP_BASE_LO, 0xffff0000);
 	gpu_write(gpu, REG_A4XX_UCHE_TRAP_BASE_HI, 0xffff0000);

 	gpu_write(gpu, REG_A4XX_CP_DEBUG, (1 << 25) |
 			(adreno_is_a420(adreno_gpu) ? (1 << 29) : 0));

 	/* On A430 enable SP regfile sleep for power savings */
 	/* TODO downstream does this for !420, so maybe applies for 405 too? */
 	if (!adreno_is_a420(adreno_gpu)) {
 		gpu_write(gpu, REG_A4XX_RBBM_SP_REGFILE_SLEEP_CNTL_0,
 			0x00000441);
 		gpu_write(gpu, REG_A4XX_RBBM_SP_REGFILE_SLEEP_CNTL_1,
 			0x00000441);
 	}

 	a4xx_enable_hwcg(gpu);

 	/*
 	 * For A420 set RBBM_CLOCK_DELAY_HLSQ.CGC_HLSQ_TP_EARLY_CYC >= 2
 	 * due to timing issue with HLSQ_TP_CLK_EN
 	 */
 	if (adreno_is_a420(adreno_gpu)) {
 		unsigned int val;
 		val = gpu_read(gpu, REG_A4XX_RBBM_CLOCK_DELAY_HLSQ);
 		val &= ~A4XX_CGC_HLSQ_EARLY_CYC__MASK;
 		val |= 2 << A4XX_CGC_HLSQ_EARLY_CYC__SHIFT;
 		gpu_write(gpu, REG_A4XX_RBBM_CLOCK_DELAY_HLSQ, val);
 	}

 	/* setup access protection: */
 	gpu_write(gpu, REG_A4XX_CP_PROTECT_CTRL, 0x00000007);

 	/* RBBM registers */
 	gpu_write(gpu, REG_A4XX_CP_PROTECT(0), 0x62000010);
 	gpu_write(gpu, REG_A4XX_CP_PROTECT(1), 0x63000020);
 	gpu_write(gpu, REG_A4XX_CP_PROTECT(2), 0x64000040);
 	gpu_write(gpu, REG_A4XX_CP_PROTECT(3), 0x65000080);
 	gpu_write(gpu, REG_A4XX_CP_PROTECT(4), 0x66000100);
 	gpu_write(gpu, REG_A4XX_CP_PROTECT(5), 0x64000200);

 	/* CP registers */
 	gpu_write(gpu, REG_A4XX_CP_PROTECT(6), 0x67000800);
 	gpu_write(gpu, REG_A4XX_CP_PROTECT(7), 0x64001600);


 	/* RB registers */
 	gpu_write(gpu, REG_A4XX_CP_PROTECT(8), 0x60003300);

 	/* HLSQ registers */
 	gpu_write(gpu, REG_A4XX_CP_PROTECT(9), 0x60003800);

 	/* VPC registers */
 	gpu_write(gpu, REG_A4XX_CP_PROTECT(10), 0x61003980);

 	/* SMMU registers */
 	gpu_write(gpu, REG_A4XX_CP_PROTECT(11), 0x6e010000);

 	gpu_write(gpu, REG_A4XX_RBBM_INT_0_MASK, A4XX_INT0_MASK);

 	ret = adreno_hw_init(gpu);
 	if (ret)
 		return ret;

 	/* Load PM4: */
 	ptr = (uint32_t *)(adreno_gpu->fw[ADRENO_FW_PM4]->data);
 	len = adreno_gpu->fw[ADRENO_FW_PM4]->size / 4;
 	DBG("loading PM4 ucode version: %u", ptr[0]);
 	gpu_write(gpu, REG_A4XX_CP_ME_RAM_WADDR, 0);
 	for (i = 1; i < len; i++)
 		gpu_write(gpu, REG_A4XX_CP_ME_RAM_DATA, ptr[i]);

 	/* Load PFP: */
 	ptr = (uint32_t *)(adreno_gpu->fw[ADRENO_FW_PFP]->data);
 	len = adreno_gpu->fw[ADRENO_FW_PFP]->size / 4;
 	DBG("loading PFP ucode version: %u", ptr[0]);

 	gpu_write(gpu, REG_A4XX_CP_PFP_UCODE_ADDR, 0);
 	for (i = 1; i < len; i++)
 		gpu_write(gpu, REG_A4XX_CP_PFP_UCODE_DATA, ptr[i]);

 	/* clear ME_HALT to start micro engine */
 	gpu_write(gpu, REG_A4XX_CP_ME_CNTL, 0);

 	return a4xx_me_init(gpu) ? 0 : -EINVAL;
 }

 static void a4xx_recover(struct msm_gpu *gpu)
 {
 	int i;

 	adreno_dump_info(gpu);

 	for (i = 0; i < 8; i++) {
 		printk("CP_SCRATCH_REG%d: %u\n", i,
 			gpu_read(gpu, REG_AXXX_CP_SCRATCH_REG0 + i));
 	}

 	/* dump registers before resetting gpu, if enabled: */
 	if (hang_debug)
 		a4xx_dump(gpu);

 	gpu_write(gpu, REG_A4XX_RBBM_SW_RESET_CMD, 1);
 	gpu_read(gpu, REG_A4XX_RBBM_SW_RESET_CMD);
 	gpu_write(gpu, REG_A4XX_RBBM_SW_RESET_CMD, 0);
 	adreno_recover(gpu);
 }

 static void a4xx_destroy(struct msm_gpu *gpu)
 {
 	struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
 	struct a4xx_gpu *a4xx_gpu = to_a4xx_gpu(adreno_gpu);

 	DBG("%s", gpu->name);

 	adreno_gpu_cleanup(adreno_gpu);

 #ifdef CONFIG_MSM_OCMEM
 	if (a4xx_gpu->ocmem_base)
 		ocmem_free(OCMEM_GRAPHICS, a4xx_gpu->ocmem_hdl);
 #endif

 	kfree(a4xx_gpu);
 }

 static bool a4xx_idle(struct msm_gpu *gpu)
 {
 	/* wait for ringbuffer to drain: */
 	if (!adreno_idle(gpu, gpu->rb[0]))
 		return false;

 	/* then wait for GPU to finish: */
 	if (spin_until(!(gpu_read(gpu, REG_A4XX_RBBM_STATUS) &
 					A4XX_RBBM_STATUS_GPU_BUSY))) {
 		DRM_ERROR("%s: timeout waiting for GPU to idle!\n", gpu->name);
 		/* TODO maybe we need to reset GPU here to recover from hang? */
 		return false;
 	}

 	return true;
 }

 static irqreturn_t a4xx_irq(struct msm_gpu *gpu)
 {
 	uint32_t status;

 	status = gpu_read(gpu, REG_A4XX_RBBM_INT_0_STATUS);
 	DBG("%s: Int status %08x", gpu->name, status);

 	if (status & A4XX_INT0_CP_REG_PROTECT_FAULT) {
 		uint32_t reg = gpu_read(gpu, REG_A4XX_CP_PROTECT_STATUS);
 		printk("CP | Protected mode error| %s | addr=%x\n",
 			reg & (1 << 24) ? "WRITE" : "READ",
 			(reg & 0xFFFFF) >> 2);
 	}

 	gpu_write(gpu, REG_A4XX_RBBM_INT_CLEAR_CMD, status);

 	msm_gpu_retire(gpu);

 	return IRQ_HANDLED;
 }

 static const unsigned int a4xx_registers[] = {
 	/* RBBM */
 	0x0000, 0x0002, 0x0004, 0x0021, 0x0023, 0x0024, 0x0026, 0x0026,
 	0x0028, 0x002B, 0x002E, 0x0034, 0x0037, 0x0044, 0x0047, 0x0066,
 	0x0068, 0x0095, 0x009C, 0x0170, 0x0174, 0x01AF,
 	/* CP */
 	0x0200, 0x0233, 0x0240, 0x0250, 0x04C0, 0x04DD, 0x0500, 0x050B,
 	0x0578, 0x058F,
 	/* VSC */
 	0x0C00, 0x0C03, 0x0C08, 0x0C41, 0x0C50, 0x0C51,
 	/* GRAS */
 	0x0C80, 0x0C81, 0x0C88, 0x0C8F,
 	/* RB */
 	0x0CC0, 0x0CC0, 0x0CC4, 0x0CD2,
 	/* PC */
 	0x0D00, 0x0D0C, 0x0D10, 0x0D17, 0x0D20, 0x0D23,
 	/* VFD */
 	0x0E40, 0x0E4A,
 	/* VPC */
 	0x0E60, 0x0E61, 0x0E63, 0x0E68,
 	/* UCHE */
 	0x0E80, 0x0E84, 0x0E88, 0x0E95,
 	/* VMIDMT */
 	0x1000, 0x1000, 0x1002, 0x1002, 0x1004, 0x1004, 0x1008, 0x100A,
 	0x100C, 0x100D, 0x100F, 0x1010, 0x1012, 0x1016, 0x1024, 0x1024,
 	0x1027, 0x1027, 0x1100, 0x1100, 0x1102, 0x1102, 0x1104, 0x1104,
 	0x1110, 0x1110, 0x1112, 0x1116, 0x1124, 0x1124, 0x1300, 0x1300,
 	0x1380, 0x1380,
 	/* GRAS CTX 0 */
 	0x2000, 0x2004, 0x2008, 0x2067, 0x2070, 0x2078, 0x207B, 0x216E,
 	/* PC CTX 0 */
 	0x21C0, 0x21C6, 0x21D0, 0x21D0, 0x21D9, 0x21D9, 0x21E5, 0x21E7,
 	/* VFD CTX 0 */
 	0x2200, 0x2204, 0x2208, 0x22A9,
 	/* GRAS CTX 1 */
 	0x2400, 0x2404, 0x2408, 0x2467, 0x2470, 0x2478, 0x247B, 0x256E,
 	/* PC CTX 1 */
 	0x25C0, 0x25C6, 0x25D0, 0x25D0, 0x25D9, 0x25D9, 0x25E5, 0x25E7,
 	/* VFD CTX 1 */
 	0x2600, 0x2604, 0x2608, 0x26A9,
 	/* XPU */
 	0x2C00, 0x2C01, 0x2C10, 0x2C10, 0x2C12, 0x2C16, 0x2C1D, 0x2C20,
 	0x2C28, 0x2C28, 0x2C30, 0x2C30, 0x2C32, 0x2C36, 0x2C40, 0x2C40,
 	0x2C50, 0x2C50, 0x2C52, 0x2C56, 0x2C80, 0x2C80, 0x2C94, 0x2C95,
 	/* VBIF */
 	0x3000, 0x3007, 0x300C, 0x3014, 0x3018, 0x301D, 0x3020, 0x3022,
 	0x3024, 0x3026, 0x3028, 0x302A, 0x302C, 0x302D, 0x3030, 0x3031,
 	0x3034, 0x3036, 0x3038, 0x3038, 0x303C, 0x303D, 0x3040, 0x3040,
 	0x3049, 0x3049, 0x3058, 0x3058, 0x305B, 0x3061, 0x3064, 0x3068,
 	0x306C, 0x306D, 0x3080, 0x3088, 0x308B, 0x308C, 0x3090, 0x3094,
 	0x3098, 0x3098, 0x309C, 0x309C, 0x30C0, 0x30C0, 0x30C8, 0x30C8,
 	0x30D0, 0x30D0, 0x30D8, 0x30D8, 0x30E0, 0x30E0, 0x3100, 0x3100,
 	0x3108, 0x3108, 0x3110, 0x3110, 0x3118, 0x3118, 0x3120, 0x3120,
 	0x3124, 0x3125, 0x3129, 0x3129, 0x3131, 0x3131, 0x330C, 0x330C,
 	0x3310, 0x3310, 0x3400, 0x3401, 0x3410, 0x3410, 0x3412, 0x3416,
 	0x341D, 0x3420, 0x3428, 0x3428, 0x3430, 0x3430, 0x3432, 0x3436,
 	0x3440, 0x3440, 0x3450, 0x3450, 0x3452, 0x3456, 0x3480, 0x3480,
 	0x3494, 0x3495, 0x4000, 0x4000, 0x4002, 0x4002, 0x4004, 0x4004,
 	0x4008, 0x400A, 0x400C, 0x400D, 0x400F, 0x4012, 0x4014, 0x4016,
 	0x401D, 0x401D, 0x4020, 0x4027, 0x4060, 0x4062, 0x4200, 0x4200,
 	0x4300, 0x4300, 0x4400, 0x4400, 0x4500, 0x4500, 0x4800, 0x4802,
 	0x480F, 0x480F, 0x4811, 0x4811, 0x4813, 0x4813, 0x4815, 0x4816,
 	0x482B, 0x482B, 0x4857, 0x4857, 0x4883, 0x4883, 0x48AF, 0x48AF,
 	0x48C5, 0x48C5, 0x48E5, 0x48E5, 0x4905, 0x4905, 0x4925, 0x4925,
 	0x4945, 0x4945, 0x4950, 0x4950, 0x495B, 0x495B, 0x4980, 0x498E,
 	0x4B00, 0x4B00, 0x4C00, 0x4C00, 0x4D00, 0x4D00, 0x4E00, 0x4E00,
 	0x4E80, 0x4E80, 0x4F00, 0x4F00, 0x4F08, 0x4F08, 0x4F10, 0x4F10,
 	0x4F18, 0x4F18, 0x4F20, 0x4F20, 0x4F30, 0x4F30, 0x4F60, 0x4F60,
 	0x4F80, 0x4F81, 0x4F88, 0x4F89, 0x4FEE, 0x4FEE, 0x4FF3, 0x4FF3,
 	0x6000, 0x6001, 0x6008, 0x600F, 0x6014, 0x6016, 0x6018, 0x601B,
 	0x61FD, 0x61FD, 0x623C, 0x623C, 0x6380, 0x6380, 0x63A0, 0x63A0,
 	0x63C0, 0x63C1, 0x63C8, 0x63C9, 0x63D0, 0x63D4, 0x63D6, 0x63D6,
 	0x63EE, 0x63EE, 0x6400, 0x6401, 0x6408, 0x640F, 0x6414, 0x6416,
 	0x6418, 0x641B, 0x65FD, 0x65FD, 0x663C, 0x663C, 0x6780, 0x6780,
 	0x67A0, 0x67A0, 0x67C0, 0x67C1, 0x67C8, 0x67C9, 0x67D0, 0x67D4,
 	0x67D6, 0x67D6, 0x67EE, 0x67EE, 0x6800, 0x6801, 0x6808, 0x680F,
 	0x6814, 0x6816, 0x6818, 0x681B, 0x69FD, 0x69FD, 0x6A3C, 0x6A3C,
 	0x6B80, 0x6B80, 0x6BA0, 0x6BA0, 0x6BC0, 0x6BC1, 0x6BC8, 0x6BC9,
 	0x6BD0, 0x6BD4, 0x6BD6, 0x6BD6, 0x6BEE, 0x6BEE,
 	~0 /* sentinel */
 };

 static struct msm_gpu_state *a4xx_gpu_state_get(struct msm_gpu *gpu)
 {
 	struct msm_gpu_state *state = kzalloc(sizeof(*state), GFP_KERNEL);

 	if (!state)
 		return ERR_PTR(-ENOMEM);

 	adreno_gpu_state_get(gpu, state);

 	state->rbbm_status = gpu_read(gpu, REG_A4XX_RBBM_STATUS);

 	return state;
 }

 /* Register offset defines for A4XX, in order of enum adreno_regs */
 static const unsigned int a4xx_register_offsets[REG_ADRENO_REGISTER_MAX] = {
 	REG_ADRENO_DEFINE(REG_ADRENO_CP_RB_BASE, REG_A4XX_CP_RB_BASE),
 	REG_ADRENO_SKIP(REG_ADRENO_CP_RB_BASE_HI),
 	REG_ADRENO_DEFINE(REG_ADRENO_CP_RB_RPTR_ADDR, REG_A4XX_CP_RB_RPTR_ADDR),
 	REG_ADRENO_SKIP(REG_ADRENO_CP_RB_RPTR_ADDR_HI),
 	REG_ADRENO_DEFINE(REG_ADRENO_CP_RB_RPTR, REG_A4XX_CP_RB_RPTR),
 	REG_ADRENO_DEFINE(REG_ADRENO_CP_RB_WPTR, REG_A4XX_CP_RB_WPTR),
 	REG_ADRENO_DEFINE(REG_ADRENO_CP_RB_CNTL, REG_A4XX_CP_RB_CNTL),
 };

 static void a4xx_dump(struct msm_gpu *gpu)
 {
 	printk("status:   %08x\n",
 			gpu_read(gpu, REG_A4XX_RBBM_STATUS));
 	adreno_dump(gpu);
 }

 static int a4xx_pm_resume(struct msm_gpu *gpu) {
 	struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
 	int ret;

 	ret = msm_gpu_pm_resume(gpu);
 	if (ret)
 		return ret;

 	if (adreno_is_a430(adreno_gpu)) {
 		unsigned int reg;
 		/* Set the default register values; set SW_COLLAPSE to 0 */
 		gpu_write(gpu, REG_A4XX_RBBM_POWER_CNTL_IP, 0x778000);
 		do {
 			udelay(5);
 			reg = gpu_read(gpu, REG_A4XX_RBBM_POWER_STATUS);
 		} while (!(reg & A4XX_RBBM_POWER_CNTL_IP_SP_TP_PWR_ON));
 	}
 	return 0;
 }

 static int a4xx_pm_suspend(struct msm_gpu *gpu) {
 	struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
 	int ret;

 	ret = msm_gpu_pm_suspend(gpu);
 	if (ret)
 		return ret;

 	if (adreno_is_a430(adreno_gpu)) {
 		/* Set the default register values; set SW_COLLAPSE to 1 */
 		gpu_write(gpu, REG_A4XX_RBBM_POWER_CNTL_IP, 0x778001);
 	}
 	return 0;
 }

 static int a4xx_get_timestamp(struct msm_gpu *gpu, uint64_t *value)
 {
 	*value = gpu_read64(gpu, REG_A4XX_RBBM_PERFCTR_CP_0_LO,
 		REG_A4XX_RBBM_PERFCTR_CP_0_HI);

 	return 0;
 }

 static const struct adreno_gpu_funcs funcs = {
 	.base = {
 		.get_param = adreno_get_param,
 		.hw_init = a4xx_hw_init,
 		.pm_suspend = a4xx_pm_suspend,
 		.pm_resume = a4xx_pm_resume,
 		.recover = a4xx_recover,
 		.submit = adreno_submit,
 		.flush = adreno_flush,
 		.active_ring = adreno_active_ring,
 		.irq = a4xx_irq,
 		.destroy = a4xx_destroy,
 #if defined(CONFIG_DEBUG_FS) || defined(CONFIG_DEV_COREDUMP)
 		.show = adreno_show,
 #endif
 		.gpu_state_get = a4xx_gpu_state_get,
 		.gpu_state_put = adreno_gpu_state_put,
 	},
 	.get_timestamp = a4xx_get_timestamp,
 };

 struct msm_gpu *a4xx_gpu_init(struct drm_device *dev)
 {
 	struct a4xx_gpu *a4xx_gpu = NULL;
 	struct adreno_gpu *adreno_gpu;
 	struct msm_gpu *gpu;
 	struct msm_drm_private *priv = dev->dev_private;
 	struct platform_device *pdev = priv->gpu_pdev;
 	int ret;

 	if (!pdev) {
 		dev_err(dev->dev, "no a4xx device\n");
 		ret = -ENXIO;
 		goto fail;
 	}

 	a4xx_gpu = kzalloc(sizeof(*a4xx_gpu), GFP_KERNEL);
 	if (!a4xx_gpu) {
 		ret = -ENOMEM;
 		goto fail;
 	}

 	adreno_gpu = &a4xx_gpu->base;
 	gpu = &adreno_gpu->base;

 	gpu->perfcntrs = NULL;
 	gpu->num_perfcntrs = 0;

 	adreno_gpu->registers = a4xx_registers;
 	adreno_gpu->reg_offsets = a4xx_register_offsets;

 	ret = adreno_gpu_init(dev, pdev, adreno_gpu, &funcs, 1);
 	if (ret)
 		goto fail;

 	/* if needed, allocate gmem: */
 	if (adreno_is_a4xx(adreno_gpu)) {
 #ifdef CONFIG_MSM_OCMEM
 		/* TODO this is different/missing upstream: */
 		struct ocmem_buf *ocmem_hdl =
 				ocmem_allocate(OCMEM_GRAPHICS, adreno_gpu->gmem);

 		a4xx_gpu->ocmem_hdl = ocmem_hdl;
 		a4xx_gpu->ocmem_base = ocmem_hdl->addr;
 		adreno_gpu->gmem = ocmem_hdl->len;
 		DBG("using %dK of OCMEM at 0x%08x", adreno_gpu->gmem / 1024,
 				a4xx_gpu->ocmem_base);
 #endif
 	}

 	if (!gpu->aspace) {
 		/* TODO we think it is possible to configure the GPU to
 		 * restrict access to VRAM carveout.  But the required
 		 * registers are unknown.  For now just bail out and
 		 * limp along with just modesetting.  If it turns out
 		 * to not be possible to restrict access, then we must
 		 * implement a cmdstream validator.
 		 */
 		dev_err(dev->dev, "No memory protection without IOMMU\n");
 		ret = -ENXIO;
 		goto fail;
 	}

 	return gpu;

 fail:
 	if (a4xx_gpu)
 		a4xx_destroy(&a4xx_gpu->base.base);

 	return ERR_PTR(ret);
 }
	/* Copyright (c) 2014 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.
	*
	*/
	#include "a4xx_gpu.h"
	#ifdef CONFIG_MSM_OCMEM
	# include <soc/qcom/ocmem.h>
	#endif

	#define A4XX_INT0_MASK \
	(A4XX_INT0_RBBM_AHB_ERROR \| \
	A4XX_INT0_RBBM_ATB_BUS_OVERFLOW \| \
	A4XX_INT0_CP_T0_PACKET_IN_IB \| \
	A4XX_INT0_CP_OPCODE_ERROR \| \
	A4XX_INT0_CP_RESERVED_BIT_ERROR \| \
	A4XX_INT0_CP_HW_FAULT \| \
	A4XX_INT0_CP_IB1_INT \| \
	A4XX_INT0_CP_IB2_INT \| \
	A4XX_INT0_CP_RB_INT \| \
	A4XX_INT0_CP_REG_PROTECT_FAULT \| \
	A4XX_INT0_CP_AHB_ERROR_HALT \| \
	A4XX_INT0_CACHE_FLUSH_TS \| \
	A4XX_INT0_UCHE_OOB_ACCESS)

	extern bool hang_debug;
	static void a4xx_dump(struct msm_gpu *gpu);
	static bool a4xx_idle(struct msm_gpu *gpu);

	/*
	* a4xx_enable_hwcg() - Program the clock control registers
	* @device: The adreno device pointer
	*/
	static void a4xx_enable_hwcg(struct msm_gpu *gpu)
	{
	struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
	unsigned int i;
	for (i = 0; i < 4; i++)
	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_CTL_TP(i), 0x02222202);
	for (i = 0; i < 4; i++)
	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_CTL2_TP(i), 0x00002222);
	for (i = 0; i < 4; i++)
	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_HYST_TP(i), 0x0E739CE7);
	for (i = 0; i < 4; i++)
	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_DELAY_TP(i), 0x00111111);
	for (i = 0; i < 4; i++)
	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_CTL_SP(i), 0x22222222);
	for (i = 0; i < 4; i++)
	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_CTL2_SP(i), 0x00222222);
	for (i = 0; i < 4; i++)
	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_HYST_SP(i), 0x00000104);
	for (i = 0; i < 4; i++)
	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_DELAY_SP(i), 0x00000081);
	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_CTL_UCHE, 0x22222222);
	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_CTL2_UCHE, 0x02222222);
	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_CTL3_UCHE, 0x00000000);
	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_CTL4_UCHE, 0x00000000);
	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_HYST_UCHE, 0x00004444);
	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_DELAY_UCHE, 0x00001112);
	for (i = 0; i < 4; i++)
	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_CTL_RB(i), 0x22222222);

	/* Disable L1 clocking in A420 due to CCU issues with it */
	for (i = 0; i < 4; i++) {
	if (adreno_is_a420(adreno_gpu)) {
	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_CTL2_RB(i),
	0x00002020);
	} else {
	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_CTL2_RB(i),
	0x00022020);
	}
	}

	for (i = 0; i < 4; i++) {
	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_CTL_MARB_CCU(i),
	0x00000922);
	}

	for (i = 0; i < 4; i++) {
	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_HYST_RB_MARB_CCU(i),
	0x00000000);
	}

	for (i = 0; i < 4; i++) {
	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_DELAY_RB_MARB_CCU_L1(i),
	0x00000001);
	}

	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_MODE_GPC, 0x02222222);
	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_HYST_GPC, 0x04100104);
	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_DELAY_GPC, 0x00022222);
	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_CTL_COM_DCOM, 0x00000022);
	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_HYST_COM_DCOM, 0x0000010F);
	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_DELAY_COM_DCOM, 0x00000022);
	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_CTL_TSE_RAS_RBBM, 0x00222222);
	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_HYST_TSE_RAS_RBBM, 0x00004104);
	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_DELAY_TSE_RAS_RBBM, 0x00000222);
	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_CTL_HLSQ , 0x00000000);
	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_HYST_HLSQ, 0x00000000);
	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_DELAY_HLSQ, 0x00220000);
	/* Early A430's have a timing issue with SP/TP power collapse;
	disabling HW clock gating prevents it. */
	if (adreno_is_a430(adreno_gpu) && adreno_gpu->rev.patchid < 2)
	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_CTL, 0);
	else
	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_CTL, 0xAAAAAAAA);
	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_CTL2, 0);
	}


	static bool a4xx_me_init(struct msm_gpu *gpu)
	{
	struct msm_ringbuffer *ring = gpu->rb[0];

	OUT_PKT3(ring, CP_ME_INIT, 17);
	OUT_RING(ring, 0x000003f7);
	OUT_RING(ring, 0x00000000);
	OUT_RING(ring, 0x00000000);
	OUT_RING(ring, 0x00000000);
	OUT_RING(ring, 0x00000080);
	OUT_RING(ring, 0x00000100);
	OUT_RING(ring, 0x00000180);
	OUT_RING(ring, 0x00006600);
	OUT_RING(ring, 0x00000150);
	OUT_RING(ring, 0x0000014e);
	OUT_RING(ring, 0x00000154);
	OUT_RING(ring, 0x00000001);
	OUT_RING(ring, 0x00000000);
	OUT_RING(ring, 0x00000000);
	OUT_RING(ring, 0x00000000);
	OUT_RING(ring, 0x00000000);
	OUT_RING(ring, 0x00000000);

	gpu->funcs->flush(gpu, ring);
	return a4xx_idle(gpu);
	}

	static int a4xx_hw_init(struct msm_gpu *gpu)
	{
	struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
	struct a4xx_gpu *a4xx_gpu = to_a4xx_gpu(adreno_gpu);
	uint32_t *ptr, len;
	int i, ret;

	if (adreno_is_a420(adreno_gpu)) {
	gpu_write(gpu, REG_A4XX_VBIF_ABIT_SORT, 0x0001001F);
	gpu_write(gpu, REG_A4XX_VBIF_ABIT_SORT_CONF, 0x000000A4);
	gpu_write(gpu, REG_A4XX_VBIF_GATE_OFF_WRREQ_EN, 0x00000001);
	gpu_write(gpu, REG_A4XX_VBIF_IN_RD_LIM_CONF0, 0x18181818);
	gpu_write(gpu, REG_A4XX_VBIF_IN_RD_LIM_CONF1, 0x00000018);
	gpu_write(gpu, REG_A4XX_VBIF_IN_WR_LIM_CONF0, 0x18181818);
	gpu_write(gpu, REG_A4XX_VBIF_IN_WR_LIM_CONF1, 0x00000018);
	gpu_write(gpu, REG_A4XX_VBIF_ROUND_ROBIN_QOS_ARB, 0x00000003);
	} else if (adreno_is_a430(adreno_gpu)) {
	gpu_write(gpu, REG_A4XX_VBIF_GATE_OFF_WRREQ_EN, 0x00000001);
	gpu_write(gpu, REG_A4XX_VBIF_IN_RD_LIM_CONF0, 0x18181818);
	gpu_write(gpu, REG_A4XX_VBIF_IN_RD_LIM_CONF1, 0x00000018);
	gpu_write(gpu, REG_A4XX_VBIF_IN_WR_LIM_CONF0, 0x18181818);
	gpu_write(gpu, REG_A4XX_VBIF_IN_WR_LIM_CONF1, 0x00000018);
	gpu_write(gpu, REG_A4XX_VBIF_ROUND_ROBIN_QOS_ARB, 0x00000003);
	} else {
	BUG();
	}

	/* Make all blocks contribute to the GPU BUSY perf counter */
	gpu_write(gpu, REG_A4XX_RBBM_GPU_BUSY_MASKED, 0xffffffff);

	/* Tune the hystersis counters for SP and CP idle detection */
	gpu_write(gpu, REG_A4XX_RBBM_SP_HYST_CNT, 0x10);
	gpu_write(gpu, REG_A4XX_RBBM_WAIT_IDLE_CLOCKS_CTL, 0x10);

	if (adreno_is_a430(adreno_gpu)) {
	gpu_write(gpu, REG_A4XX_RBBM_WAIT_IDLE_CLOCKS_CTL2, 0x30);
	}

	/* Enable the RBBM error reporting bits */
	gpu_write(gpu, REG_A4XX_RBBM_AHB_CTL0, 0x00000001);

	/* Enable AHB error reporting*/
	gpu_write(gpu, REG_A4XX_RBBM_AHB_CTL1, 0xa6ffffff);

	/* Enable power counters*/
	gpu_write(gpu, REG_A4XX_RBBM_RBBM_CTL, 0x00000030);

	/*
	* Turn on hang detection - this spews a lot of useful information
	* into the RBBM registers on a hang:
	*/
	gpu_write(gpu, REG_A4XX_RBBM_INTERFACE_HANG_INT_CTL,
	(1 << 30) \| 0xFFFF);

	gpu_write(gpu, REG_A4XX_RB_GMEM_BASE_ADDR,
	(unsigned int)(a4xx_gpu->ocmem_base >> 14));

	/* Turn on performance counters: */
	gpu_write(gpu, REG_A4XX_RBBM_PERFCTR_CTL, 0x01);

	/* use the first CP counter for timestamp queries.. userspace may set
	* this as well but it selects the same counter/countable:
	*/
	gpu_write(gpu, REG_A4XX_CP_PERFCTR_CP_SEL_0, CP_ALWAYS_COUNT);

	if (adreno_is_a430(adreno_gpu))
	gpu_write(gpu, REG_A4XX_UCHE_CACHE_WAYS_VFD, 0x07);

	/* Disable L2 bypass to avoid UCHE out of bounds errors */
	gpu_write(gpu, REG_A4XX_UCHE_TRAP_BASE_LO, 0xffff0000);
	gpu_write(gpu, REG_A4XX_UCHE_TRAP_BASE_HI, 0xffff0000);

	gpu_write(gpu, REG_A4XX_CP_DEBUG, (1 << 25) \|
	(adreno_is_a420(adreno_gpu) ? (1 << 29) : 0));

	/* On A430 enable SP regfile sleep for power savings */
	/* TODO downstream does this for !420, so maybe applies for 405 too? */
	if (!adreno_is_a420(adreno_gpu)) {
	gpu_write(gpu, REG_A4XX_RBBM_SP_REGFILE_SLEEP_CNTL_0,
	0x00000441);
	gpu_write(gpu, REG_A4XX_RBBM_SP_REGFILE_SLEEP_CNTL_1,
	0x00000441);
	}

	a4xx_enable_hwcg(gpu);

	/*
	* For A420 set RBBM_CLOCK_DELAY_HLSQ.CGC_HLSQ_TP_EARLY_CYC >= 2
	* due to timing issue with HLSQ_TP_CLK_EN
	*/
	if (adreno_is_a420(adreno_gpu)) {
	unsigned int val;
	val = gpu_read(gpu, REG_A4XX_RBBM_CLOCK_DELAY_HLSQ);
	val &= ~A4XX_CGC_HLSQ_EARLY_CYC__MASK;
	val \|= 2 << A4XX_CGC_HLSQ_EARLY_CYC__SHIFT;
	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_DELAY_HLSQ, val);
	}

	/* setup access protection: */
	gpu_write(gpu, REG_A4XX_CP_PROTECT_CTRL, 0x00000007);

	/* RBBM registers */
	gpu_write(gpu, REG_A4XX_CP_PROTECT(0), 0x62000010);
	gpu_write(gpu, REG_A4XX_CP_PROTECT(1), 0x63000020);
	gpu_write(gpu, REG_A4XX_CP_PROTECT(2), 0x64000040);
	gpu_write(gpu, REG_A4XX_CP_PROTECT(3), 0x65000080);
	gpu_write(gpu, REG_A4XX_CP_PROTECT(4), 0x66000100);
	gpu_write(gpu, REG_A4XX_CP_PROTECT(5), 0x64000200);

	/* CP registers */
	gpu_write(gpu, REG_A4XX_CP_PROTECT(6), 0x67000800);
	gpu_write(gpu, REG_A4XX_CP_PROTECT(7), 0x64001600);


	/* RB registers */
	gpu_write(gpu, REG_A4XX_CP_PROTECT(8), 0x60003300);

	/* HLSQ registers */
	gpu_write(gpu, REG_A4XX_CP_PROTECT(9), 0x60003800);

	/* VPC registers */
	gpu_write(gpu, REG_A4XX_CP_PROTECT(10), 0x61003980);

	/* SMMU registers */
	gpu_write(gpu, REG_A4XX_CP_PROTECT(11), 0x6e010000);

	gpu_write(gpu, REG_A4XX_RBBM_INT_0_MASK, A4XX_INT0_MASK);

	ret = adreno_hw_init(gpu);
	if (ret)
	return ret;

	/* Load PM4: */
	ptr = (uint32_t *)(adreno_gpu->fw[ADRENO_FW_PM4]->data);
	len = adreno_gpu->fw[ADRENO_FW_PM4]->size / 4;
	DBG("loading PM4 ucode version: %u", ptr[0]);
	gpu_write(gpu, REG_A4XX_CP_ME_RAM_WADDR, 0);
	for (i = 1; i < len; i++)
	gpu_write(gpu, REG_A4XX_CP_ME_RAM_DATA, ptr[i]);

	/* Load PFP: */
	ptr = (uint32_t *)(adreno_gpu->fw[ADRENO_FW_PFP]->data);
	len = adreno_gpu->fw[ADRENO_FW_PFP]->size / 4;
	DBG("loading PFP ucode version: %u", ptr[0]);

	gpu_write(gpu, REG_A4XX_CP_PFP_UCODE_ADDR, 0);
	for (i = 1; i < len; i++)
	gpu_write(gpu, REG_A4XX_CP_PFP_UCODE_DATA, ptr[i]);

	/* clear ME_HALT to start micro engine */
	gpu_write(gpu, REG_A4XX_CP_ME_CNTL, 0);

	return a4xx_me_init(gpu) ? 0 : -EINVAL;
	}

	static void a4xx_recover(struct msm_gpu *gpu)
	{
	int i;

	adreno_dump_info(gpu);

	for (i = 0; i < 8; i++) {
	printk("CP_SCRATCH_REG%d: %u\n", i,
	gpu_read(gpu, REG_AXXX_CP_SCRATCH_REG0 + i));
	}

	/* dump registers before resetting gpu, if enabled: */
	if (hang_debug)
	a4xx_dump(gpu);

	gpu_write(gpu, REG_A4XX_RBBM_SW_RESET_CMD, 1);
	gpu_read(gpu, REG_A4XX_RBBM_SW_RESET_CMD);
	gpu_write(gpu, REG_A4XX_RBBM_SW_RESET_CMD, 0);
	adreno_recover(gpu);
	}

	static void a4xx_destroy(struct msm_gpu *gpu)
	{
	struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
	struct a4xx_gpu *a4xx_gpu = to_a4xx_gpu(adreno_gpu);

	DBG("%s", gpu->name);

	adreno_gpu_cleanup(adreno_gpu);

	#ifdef CONFIG_MSM_OCMEM
	if (a4xx_gpu->ocmem_base)
	ocmem_free(OCMEM_GRAPHICS, a4xx_gpu->ocmem_hdl);
	#endif

	kfree(a4xx_gpu);
	}

	static bool a4xx_idle(struct msm_gpu *gpu)
	{
	/* wait for ringbuffer to drain: */
	if (!adreno_idle(gpu, gpu->rb[0]))
	return false;

	/* then wait for GPU to finish: */
	if (spin_until(!(gpu_read(gpu, REG_A4XX_RBBM_STATUS) &
	A4XX_RBBM_STATUS_GPU_BUSY))) {
	DRM_ERROR("%s: timeout waiting for GPU to idle!\n", gpu->name);
	/* TODO maybe we need to reset GPU here to recover from hang? */
	return false;
	}

	return true;
	}

	static irqreturn_t a4xx_irq(struct msm_gpu *gpu)
	{
	uint32_t status;

	status = gpu_read(gpu, REG_A4XX_RBBM_INT_0_STATUS);
	DBG("%s: Int status %08x", gpu->name, status);

	if (status & A4XX_INT0_CP_REG_PROTECT_FAULT) {
	uint32_t reg = gpu_read(gpu, REG_A4XX_CP_PROTECT_STATUS);
	printk("CP \| Protected mode error\| %s \| addr=%x\n",
	reg & (1 << 24) ? "WRITE" : "READ",
	(reg & 0xFFFFF) >> 2);
	}

	gpu_write(gpu, REG_A4XX_RBBM_INT_CLEAR_CMD, status);

	msm_gpu_retire(gpu);

	return IRQ_HANDLED;
	}

	static const unsigned int a4xx_registers[] = {
	/* RBBM */
	0x0000, 0x0002, 0x0004, 0x0021, 0x0023, 0x0024, 0x0026, 0x0026,
	0x0028, 0x002B, 0x002E, 0x0034, 0x0037, 0x0044, 0x0047, 0x0066,
	0x0068, 0x0095, 0x009C, 0x0170, 0x0174, 0x01AF,
	/* CP */
	0x0200, 0x0233, 0x0240, 0x0250, 0x04C0, 0x04DD, 0x0500, 0x050B,
	0x0578, 0x058F,
	/* VSC */
	0x0C00, 0x0C03, 0x0C08, 0x0C41, 0x0C50, 0x0C51,
	/* GRAS */
	0x0C80, 0x0C81, 0x0C88, 0x0C8F,
	/* RB */
	0x0CC0, 0x0CC0, 0x0CC4, 0x0CD2,
	/* PC */
	0x0D00, 0x0D0C, 0x0D10, 0x0D17, 0x0D20, 0x0D23,
	/* VFD */
	0x0E40, 0x0E4A,
	/* VPC */
	0x0E60, 0x0E61, 0x0E63, 0x0E68,
	/* UCHE */
	0x0E80, 0x0E84, 0x0E88, 0x0E95,
	/* VMIDMT */
	0x1000, 0x1000, 0x1002, 0x1002, 0x1004, 0x1004, 0x1008, 0x100A,
	0x100C, 0x100D, 0x100F, 0x1010, 0x1012, 0x1016, 0x1024, 0x1024,
	0x1027, 0x1027, 0x1100, 0x1100, 0x1102, 0x1102, 0x1104, 0x1104,
	0x1110, 0x1110, 0x1112, 0x1116, 0x1124, 0x1124, 0x1300, 0x1300,
	0x1380, 0x1380,
	/* GRAS CTX 0 */
	0x2000, 0x2004, 0x2008, 0x2067, 0x2070, 0x2078, 0x207B, 0x216E,
	/* PC CTX 0 */
	0x21C0, 0x21C6, 0x21D0, 0x21D0, 0x21D9, 0x21D9, 0x21E5, 0x21E7,
	/* VFD CTX 0 */
	0x2200, 0x2204, 0x2208, 0x22A9,
	/* GRAS CTX 1 */
	0x2400, 0x2404, 0x2408, 0x2467, 0x2470, 0x2478, 0x247B, 0x256E,
	/* PC CTX 1 */
	0x25C0, 0x25C6, 0x25D0, 0x25D0, 0x25D9, 0x25D9, 0x25E5, 0x25E7,
	/* VFD CTX 1 */
	0x2600, 0x2604, 0x2608, 0x26A9,
	/* XPU */
	0x2C00, 0x2C01, 0x2C10, 0x2C10, 0x2C12, 0x2C16, 0x2C1D, 0x2C20,
	0x2C28, 0x2C28, 0x2C30, 0x2C30, 0x2C32, 0x2C36, 0x2C40, 0x2C40,
	0x2C50, 0x2C50, 0x2C52, 0x2C56, 0x2C80, 0x2C80, 0x2C94, 0x2C95,
	/* VBIF */
	0x3000, 0x3007, 0x300C, 0x3014, 0x3018, 0x301D, 0x3020, 0x3022,
	0x3024, 0x3026, 0x3028, 0x302A, 0x302C, 0x302D, 0x3030, 0x3031,
	0x3034, 0x3036, 0x3038, 0x3038, 0x303C, 0x303D, 0x3040, 0x3040,
	0x3049, 0x3049, 0x3058, 0x3058, 0x305B, 0x3061, 0x3064, 0x3068,
	0x306C, 0x306D, 0x3080, 0x3088, 0x308B, 0x308C, 0x3090, 0x3094,
	0x3098, 0x3098, 0x309C, 0x309C, 0x30C0, 0x30C0, 0x30C8, 0x30C8,
	0x30D0, 0x30D0, 0x30D8, 0x30D8, 0x30E0, 0x30E0, 0x3100, 0x3100,
	0x3108, 0x3108, 0x3110, 0x3110, 0x3118, 0x3118, 0x3120, 0x3120,
	0x3124, 0x3125, 0x3129, 0x3129, 0x3131, 0x3131, 0x330C, 0x330C,
	0x3310, 0x3310, 0x3400, 0x3401, 0x3410, 0x3410, 0x3412, 0x3416,
	0x341D, 0x3420, 0x3428, 0x3428, 0x3430, 0x3430, 0x3432, 0x3436,
	0x3440, 0x3440, 0x3450, 0x3450, 0x3452, 0x3456, 0x3480, 0x3480,
	0x3494, 0x3495, 0x4000, 0x4000, 0x4002, 0x4002, 0x4004, 0x4004,
	0x4008, 0x400A, 0x400C, 0x400D, 0x400F, 0x4012, 0x4014, 0x4016,
	0x401D, 0x401D, 0x4020, 0x4027, 0x4060, 0x4062, 0x4200, 0x4200,
	0x4300, 0x4300, 0x4400, 0x4400, 0x4500, 0x4500, 0x4800, 0x4802,
	0x480F, 0x480F, 0x4811, 0x4811, 0x4813, 0x4813, 0x4815, 0x4816,
	0x482B, 0x482B, 0x4857, 0x4857, 0x4883, 0x4883, 0x48AF, 0x48AF,
	0x48C5, 0x48C5, 0x48E5, 0x48E5, 0x4905, 0x4905, 0x4925, 0x4925,
	0x4945, 0x4945, 0x4950, 0x4950, 0x495B, 0x495B, 0x4980, 0x498E,
	0x4B00, 0x4B00, 0x4C00, 0x4C00, 0x4D00, 0x4D00, 0x4E00, 0x4E00,
	0x4E80, 0x4E80, 0x4F00, 0x4F00, 0x4F08, 0x4F08, 0x4F10, 0x4F10,
	0x4F18, 0x4F18, 0x4F20, 0x4F20, 0x4F30, 0x4F30, 0x4F60, 0x4F60,
	0x4F80, 0x4F81, 0x4F88, 0x4F89, 0x4FEE, 0x4FEE, 0x4FF3, 0x4FF3,
	0x6000, 0x6001, 0x6008, 0x600F, 0x6014, 0x6016, 0x6018, 0x601B,
	0x61FD, 0x61FD, 0x623C, 0x623C, 0x6380, 0x6380, 0x63A0, 0x63A0,
	0x63C0, 0x63C1, 0x63C8, 0x63C9, 0x63D0, 0x63D4, 0x63D6, 0x63D6,
	0x63EE, 0x63EE, 0x6400, 0x6401, 0x6408, 0x640F, 0x6414, 0x6416,
	0x6418, 0x641B, 0x65FD, 0x65FD, 0x663C, 0x663C, 0x6780, 0x6780,
	0x67A0, 0x67A0, 0x67C0, 0x67C1, 0x67C8, 0x67C9, 0x67D0, 0x67D4,
	0x67D6, 0x67D6, 0x67EE, 0x67EE, 0x6800, 0x6801, 0x6808, 0x680F,
	0x6814, 0x6816, 0x6818, 0x681B, 0x69FD, 0x69FD, 0x6A3C, 0x6A3C,
	0x6B80, 0x6B80, 0x6BA0, 0x6BA0, 0x6BC0, 0x6BC1, 0x6BC8, 0x6BC9,
	0x6BD0, 0x6BD4, 0x6BD6, 0x6BD6, 0x6BEE, 0x6BEE,
	~0 /* sentinel */
	};

	static struct msm_gpu_state a4xx_gpu_state_get(struct msm_gpu gpu)
	{
	struct msm_gpu_state state = kzalloc(sizeof(state), GFP_KERNEL);

	if (!state)
	return ERR_PTR(-ENOMEM);

	adreno_gpu_state_get(gpu, state);

	state->rbbm_status = gpu_read(gpu, REG_A4XX_RBBM_STATUS);

	return state;
	}

	/* Register offset defines for A4XX, in order of enum adreno_regs */
	static const unsigned int a4xx_register_offsets[REG_ADRENO_REGISTER_MAX] = {
	REG_ADRENO_DEFINE(REG_ADRENO_CP_RB_BASE, REG_A4XX_CP_RB_BASE),
	REG_ADRENO_SKIP(REG_ADRENO_CP_RB_BASE_HI),
	REG_ADRENO_DEFINE(REG_ADRENO_CP_RB_RPTR_ADDR, REG_A4XX_CP_RB_RPTR_ADDR),
	REG_ADRENO_SKIP(REG_ADRENO_CP_RB_RPTR_ADDR_HI),
	REG_ADRENO_DEFINE(REG_ADRENO_CP_RB_RPTR, REG_A4XX_CP_RB_RPTR),
	REG_ADRENO_DEFINE(REG_ADRENO_CP_RB_WPTR, REG_A4XX_CP_RB_WPTR),
	REG_ADRENO_DEFINE(REG_ADRENO_CP_RB_CNTL, REG_A4XX_CP_RB_CNTL),
	};

	static void a4xx_dump(struct msm_gpu *gpu)
	{
	printk("status: %08x\n",
	gpu_read(gpu, REG_A4XX_RBBM_STATUS));
	adreno_dump(gpu);
	}

	static int a4xx_pm_resume(struct msm_gpu *gpu) {
	struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
	int ret;

	ret = msm_gpu_pm_resume(gpu);
	if (ret)
	return ret;

	if (adreno_is_a430(adreno_gpu)) {
	unsigned int reg;
	/* Set the default register values; set SW_COLLAPSE to 0 */
	gpu_write(gpu, REG_A4XX_RBBM_POWER_CNTL_IP, 0x778000);
	do {
	udelay(5);
	reg = gpu_read(gpu, REG_A4XX_RBBM_POWER_STATUS);
	} while (!(reg & A4XX_RBBM_POWER_CNTL_IP_SP_TP_PWR_ON));
	}
	return 0;
	}

	static int a4xx_pm_suspend(struct msm_gpu *gpu) {
	struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
	int ret;

	ret = msm_gpu_pm_suspend(gpu);
	if (ret)
	return ret;

	if (adreno_is_a430(adreno_gpu)) {
	/* Set the default register values; set SW_COLLAPSE to 1 */
	gpu_write(gpu, REG_A4XX_RBBM_POWER_CNTL_IP, 0x778001);
	}
	return 0;
	}

	static int a4xx_get_timestamp(struct msm_gpu gpu, uint64_t value)
	{
	*value = gpu_read64(gpu, REG_A4XX_RBBM_PERFCTR_CP_0_LO,
	REG_A4XX_RBBM_PERFCTR_CP_0_HI);

	return 0;
	}

	static const struct adreno_gpu_funcs funcs = {
	.base = {
	.get_param = adreno_get_param,
	.hw_init = a4xx_hw_init,
	.pm_suspend = a4xx_pm_suspend,
	.pm_resume = a4xx_pm_resume,
	.recover = a4xx_recover,
	.submit = adreno_submit,
	.flush = adreno_flush,
	.active_ring = adreno_active_ring,
	.irq = a4xx_irq,
	.destroy = a4xx_destroy,
	#if defined(CONFIG_DEBUG_FS) \|\| defined(CONFIG_DEV_COREDUMP)
	.show = adreno_show,
	#endif
	.gpu_state_get = a4xx_gpu_state_get,
	.gpu_state_put = adreno_gpu_state_put,
	},
	.get_timestamp = a4xx_get_timestamp,
	};

	struct msm_gpu a4xx_gpu_init(struct drm_device dev)
	{
	struct a4xx_gpu *a4xx_gpu = NULL;
	struct adreno_gpu *adreno_gpu;
	struct msm_gpu *gpu;
	struct msm_drm_private *priv = dev->dev_private;
	struct platform_device *pdev = priv->gpu_pdev;
	int ret;

	if (!pdev) {
	dev_err(dev->dev, "no a4xx device\n");
	ret = -ENXIO;
	goto fail;
	}

	a4xx_gpu = kzalloc(sizeof(*a4xx_gpu), GFP_KERNEL);
	if (!a4xx_gpu) {
	ret = -ENOMEM;
	goto fail;
	}

	adreno_gpu = &a4xx_gpu->base;
	gpu = &adreno_gpu->base;

	gpu->perfcntrs = NULL;
	gpu->num_perfcntrs = 0;

	adreno_gpu->registers = a4xx_registers;
	adreno_gpu->reg_offsets = a4xx_register_offsets;

	ret = adreno_gpu_init(dev, pdev, adreno_gpu, &funcs, 1);
	if (ret)
	goto fail;

	/* if needed, allocate gmem: */
	if (adreno_is_a4xx(adreno_gpu)) {
	#ifdef CONFIG_MSM_OCMEM
	/* TODO this is different/missing upstream: */
	struct ocmem_buf *ocmem_hdl =
	ocmem_allocate(OCMEM_GRAPHICS, adreno_gpu->gmem);

	a4xx_gpu->ocmem_hdl = ocmem_hdl;
	a4xx_gpu->ocmem_base = ocmem_hdl->addr;
	adreno_gpu->gmem = ocmem_hdl->len;
	DBG("using %dK of OCMEM at 0x%08x", adreno_gpu->gmem / 1024,
	a4xx_gpu->ocmem_base);
	#endif
	}

	if (!gpu->aspace) {
	/* TODO we think it is possible to configure the GPU to
	* restrict access to VRAM carveout. But the required
	* registers are unknown. For now just bail out and
	* limp along with just modesetting. If it turns out
	* to not be possible to restrict access, then we must
	* implement a cmdstream validator.
	*/
	dev_err(dev->dev, "No memory protection without IOMMU\n");
	ret = -ENXIO;
	goto fail;
	}

	return gpu;

	fail:
	if (a4xx_gpu)
	a4xx_destroy(&a4xx_gpu->base.base);

	return ERR_PTR(ret);
	}