535 lines
		
	
	
		
			15 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
			
		
		
	
	
			535 lines
		
	
	
		
			15 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
/*
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 * Copyright 2008 Advanced Micro Devices, Inc.
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 * Copyright 2008 Red Hat Inc.
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 * Copyright 2009 Jerome Glisse.
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 *
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 * Permission is hereby granted, free of charge, to any person obtaining a
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 * copy of this software and associated documentation files (the "Software"),
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 * to deal in the Software without restriction, including without limitation
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 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
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 * and/or sell copies of the Software, and to permit persons to whom the
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 * Software is furnished to do so, subject to the following conditions:
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 *
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 * The above copyright notice and this permission notice shall be included in
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 * all copies or substantial portions of the Software.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
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 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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 * OTHER DEALINGS IN THE SOFTWARE.
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 *
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 * Authors: Dave Airlie
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 *          Alex Deucher
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 *          Jerome Glisse
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 */
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#include <linux/seq_file.h>
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#include <drm/drmP.h>
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#include "radeon.h"
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#include "rs400d.h"
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/* This files gather functions specifics to : rs400,rs480 */
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static int rs400_debugfs_pcie_gart_info_init(struct radeon_device *rdev);
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void rs400_gart_adjust_size(struct radeon_device *rdev)
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{
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	/* Check gart size */
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	switch (rdev->mc.gtt_size/(1024*1024)) {
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	case 32:
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	case 64:
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	case 128:
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	case 256:
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	case 512:
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	case 1024:
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	case 2048:
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		break;
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	default:
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		DRM_ERROR("Unable to use IGP GART size %uM\n",
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			  (unsigned)(rdev->mc.gtt_size >> 20));
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		DRM_ERROR("Valid GART size for IGP are 32M,64M,128M,256M,512M,1G,2G\n");
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		DRM_ERROR("Forcing to 32M GART size\n");
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		rdev->mc.gtt_size = 32 * 1024 * 1024;
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		return;
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	}
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	if (rdev->family == CHIP_RS400 || rdev->family == CHIP_RS480) {
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		/* FIXME: RS400 & RS480 seems to have issue with GART size
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		 * if 4G of system memory (needs more testing) */
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		rdev->mc.gtt_size = 32 * 1024 * 1024;
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		DRM_ERROR("Forcing to 32M GART size (because of ASIC bug ?)\n");
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	}
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}
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void rs400_gart_tlb_flush(struct radeon_device *rdev)
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{
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	uint32_t tmp;
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	unsigned int timeout = rdev->usec_timeout;
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	WREG32_MC(RS480_GART_CACHE_CNTRL, RS480_GART_CACHE_INVALIDATE);
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	do {
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		tmp = RREG32_MC(RS480_GART_CACHE_CNTRL);
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		if ((tmp & RS480_GART_CACHE_INVALIDATE) == 0)
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			break;
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		DRM_UDELAY(1);
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		timeout--;
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	} while (timeout > 0);
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	WREG32_MC(RS480_GART_CACHE_CNTRL, 0);
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}
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int rs400_gart_init(struct radeon_device *rdev)
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{
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	int r;
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	if (rdev->gart.table.ram.ptr) {
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		WARN(1, "RS400 GART already initialized.\n");
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		return 0;
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	}
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	/* Check gart size */
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	switch(rdev->mc.gtt_size / (1024 * 1024)) {
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	case 32:
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	case 64:
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	case 128:
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	case 256:
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	case 512:
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	case 1024:
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	case 2048:
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		break;
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	default:
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		return -EINVAL;
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	}
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	/* Initialize common gart structure */
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	r = radeon_gart_init(rdev);
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	if (r)
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		return r;
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	if (rs400_debugfs_pcie_gart_info_init(rdev))
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		DRM_ERROR("Failed to register debugfs file for RS400 GART !\n");
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	rdev->gart.table_size = rdev->gart.num_gpu_pages * 4;
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	return radeon_gart_table_ram_alloc(rdev);
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}
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int rs400_gart_enable(struct radeon_device *rdev)
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{
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	uint32_t size_reg;
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	uint32_t tmp;
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	tmp = RREG32_MC(RS690_AIC_CTRL_SCRATCH);
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	tmp |= RS690_DIS_OUT_OF_PCI_GART_ACCESS;
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	WREG32_MC(RS690_AIC_CTRL_SCRATCH, tmp);
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	/* Check gart size */
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	switch(rdev->mc.gtt_size / (1024 * 1024)) {
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	case 32:
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		size_reg = RS480_VA_SIZE_32MB;
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		break;
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	case 64:
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		size_reg = RS480_VA_SIZE_64MB;
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		break;
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	case 128:
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		size_reg = RS480_VA_SIZE_128MB;
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		break;
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	case 256:
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		size_reg = RS480_VA_SIZE_256MB;
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		break;
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	case 512:
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		size_reg = RS480_VA_SIZE_512MB;
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		break;
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	case 1024:
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		size_reg = RS480_VA_SIZE_1GB;
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		break;
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	case 2048:
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		size_reg = RS480_VA_SIZE_2GB;
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		break;
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	default:
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		return -EINVAL;
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	}
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	/* It should be fine to program it to max value */
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	if (rdev->family == CHIP_RS690 || (rdev->family == CHIP_RS740)) {
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		WREG32_MC(RS690_MCCFG_AGP_BASE, 0xFFFFFFFF);
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		WREG32_MC(RS690_MCCFG_AGP_BASE_2, 0);
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	} else {
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		WREG32(RADEON_AGP_BASE, 0xFFFFFFFF);
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		WREG32(RS480_AGP_BASE_2, 0);
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	}
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	tmp = rdev->mc.gtt_location + rdev->mc.gtt_size - 1;
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	tmp = REG_SET(RS690_MC_AGP_TOP, tmp >> 16);
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	tmp |= REG_SET(RS690_MC_AGP_START, rdev->mc.gtt_location >> 16);
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	if ((rdev->family == CHIP_RS690) || (rdev->family == CHIP_RS740)) {
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		WREG32_MC(RS690_MCCFG_AGP_LOCATION, tmp);
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		tmp = RREG32(RADEON_BUS_CNTL) & ~RS600_BUS_MASTER_DIS;
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		WREG32(RADEON_BUS_CNTL, tmp);
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	} else {
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		WREG32(RADEON_MC_AGP_LOCATION, tmp);
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		tmp = RREG32(RADEON_BUS_CNTL) & ~RADEON_BUS_MASTER_DIS;
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		WREG32(RADEON_BUS_CNTL, tmp);
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	}
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	/* Table should be in 32bits address space so ignore bits above. */
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	tmp = (u32)rdev->gart.table_addr & 0xfffff000;
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	tmp |= (upper_32_bits(rdev->gart.table_addr) & 0xff) << 4;
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	WREG32_MC(RS480_GART_BASE, tmp);
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	/* TODO: more tweaking here */
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	WREG32_MC(RS480_GART_FEATURE_ID,
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		  (RS480_TLB_ENABLE |
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		   RS480_GTW_LAC_EN | RS480_1LEVEL_GART));
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	/* Disable snooping */
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	WREG32_MC(RS480_AGP_MODE_CNTL,
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		  (1 << RS480_REQ_TYPE_SNOOP_SHIFT) | RS480_REQ_TYPE_SNOOP_DIS);
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	/* Disable AGP mode */
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	/* FIXME: according to doc we should set HIDE_MMCFG_BAR=0,
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	 * AGPMODE30=0 & AGP30ENHANCED=0 in NB_CNTL */
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	if ((rdev->family == CHIP_RS690) || (rdev->family == CHIP_RS740)) {
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		WREG32_MC(RS480_MC_MISC_CNTL,
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			  (RS480_GART_INDEX_REG_EN | RS690_BLOCK_GFX_D3_EN));
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	} else {
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		WREG32_MC(RS480_MC_MISC_CNTL, RS480_GART_INDEX_REG_EN);
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	}
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	/* Enable gart */
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	WREG32_MC(RS480_AGP_ADDRESS_SPACE_SIZE, (RS480_GART_EN | size_reg));
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	rs400_gart_tlb_flush(rdev);
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	rdev->gart.ready = true;
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	return 0;
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}
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void rs400_gart_disable(struct radeon_device *rdev)
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{
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	uint32_t tmp;
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	tmp = RREG32_MC(RS690_AIC_CTRL_SCRATCH);
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	tmp |= RS690_DIS_OUT_OF_PCI_GART_ACCESS;
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	WREG32_MC(RS690_AIC_CTRL_SCRATCH, tmp);
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	WREG32_MC(RS480_AGP_ADDRESS_SPACE_SIZE, 0);
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}
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void rs400_gart_fini(struct radeon_device *rdev)
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{
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	rs400_gart_disable(rdev);
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	radeon_gart_table_ram_free(rdev);
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	radeon_gart_fini(rdev);
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}
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int rs400_gart_set_page(struct radeon_device *rdev, int i, uint64_t addr)
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{
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	uint32_t entry;
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	if (i < 0 || i > rdev->gart.num_gpu_pages) {
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		return -EINVAL;
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	}
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	entry = (lower_32_bits(addr) & PAGE_MASK) |
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		((upper_32_bits(addr) & 0xff) << 4) |
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		0xc;
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	entry = cpu_to_le32(entry);
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	rdev->gart.table.ram.ptr[i] = entry;
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	return 0;
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}
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void rs400_gpu_init(struct radeon_device *rdev)
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{
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	/* FIXME: HDP same place on rs400 ? */
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	r100_hdp_reset(rdev);
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	/* FIXME: is this correct ? */
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	r420_pipes_init(rdev);
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	if (r300_mc_wait_for_idle(rdev)) {
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		printk(KERN_WARNING "Failed to wait MC idle while "
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		       "programming pipes. Bad things might happen.\n");
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	}
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}
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void rs400_vram_info(struct radeon_device *rdev)
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{
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	rs400_gart_adjust_size(rdev);
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	/* DDR for all card after R300 & IGP */
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	rdev->mc.vram_is_ddr = true;
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	rdev->mc.vram_width = 128;
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	r100_vram_init_sizes(rdev);
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}
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uint32_t rs400_mc_rreg(struct radeon_device *rdev, uint32_t reg)
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{
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	uint32_t r;
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	WREG32(RS480_NB_MC_INDEX, reg & 0xff);
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	r = RREG32(RS480_NB_MC_DATA);
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	WREG32(RS480_NB_MC_INDEX, 0xff);
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	return r;
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}
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void rs400_mc_wreg(struct radeon_device *rdev, uint32_t reg, uint32_t v)
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{
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	WREG32(RS480_NB_MC_INDEX, ((reg) & 0xff) | RS480_NB_MC_IND_WR_EN);
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	WREG32(RS480_NB_MC_DATA, (v));
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	WREG32(RS480_NB_MC_INDEX, 0xff);
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}
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#if defined(CONFIG_DEBUG_FS)
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static int rs400_debugfs_gart_info(struct seq_file *m, void *data)
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{
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	struct drm_info_node *node = (struct drm_info_node *) m->private;
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	struct drm_device *dev = node->minor->dev;
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	struct radeon_device *rdev = dev->dev_private;
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	uint32_t tmp;
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	tmp = RREG32(RADEON_HOST_PATH_CNTL);
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	seq_printf(m, "HOST_PATH_CNTL 0x%08x\n", tmp);
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	tmp = RREG32(RADEON_BUS_CNTL);
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	seq_printf(m, "BUS_CNTL 0x%08x\n", tmp);
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	tmp = RREG32_MC(RS690_AIC_CTRL_SCRATCH);
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	seq_printf(m, "AIC_CTRL_SCRATCH 0x%08x\n", tmp);
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	if (rdev->family == CHIP_RS690 || (rdev->family == CHIP_RS740)) {
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		tmp = RREG32_MC(RS690_MCCFG_AGP_BASE);
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		seq_printf(m, "MCCFG_AGP_BASE 0x%08x\n", tmp);
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		tmp = RREG32_MC(RS690_MCCFG_AGP_BASE_2);
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		seq_printf(m, "MCCFG_AGP_BASE_2 0x%08x\n", tmp);
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		tmp = RREG32_MC(RS690_MCCFG_AGP_LOCATION);
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		seq_printf(m, "MCCFG_AGP_LOCATION 0x%08x\n", tmp);
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		tmp = RREG32_MC(0x100);
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		seq_printf(m, "MCCFG_FB_LOCATION 0x%08x\n", tmp);
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		tmp = RREG32(0x134);
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		seq_printf(m, "HDP_FB_LOCATION 0x%08x\n", tmp);
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	} else {
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		tmp = RREG32(RADEON_AGP_BASE);
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		seq_printf(m, "AGP_BASE 0x%08x\n", tmp);
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		tmp = RREG32(RS480_AGP_BASE_2);
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		seq_printf(m, "AGP_BASE_2 0x%08x\n", tmp);
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		tmp = RREG32(RADEON_MC_AGP_LOCATION);
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		seq_printf(m, "MC_AGP_LOCATION 0x%08x\n", tmp);
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	}
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	tmp = RREG32_MC(RS480_GART_BASE);
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	seq_printf(m, "GART_BASE 0x%08x\n", tmp);
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	tmp = RREG32_MC(RS480_GART_FEATURE_ID);
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	seq_printf(m, "GART_FEATURE_ID 0x%08x\n", tmp);
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	tmp = RREG32_MC(RS480_AGP_MODE_CNTL);
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	seq_printf(m, "AGP_MODE_CONTROL 0x%08x\n", tmp);
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	tmp = RREG32_MC(RS480_MC_MISC_CNTL);
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	seq_printf(m, "MC_MISC_CNTL 0x%08x\n", tmp);
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	tmp = RREG32_MC(0x5F);
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	seq_printf(m, "MC_MISC_UMA_CNTL 0x%08x\n", tmp);
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	tmp = RREG32_MC(RS480_AGP_ADDRESS_SPACE_SIZE);
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	seq_printf(m, "AGP_ADDRESS_SPACE_SIZE 0x%08x\n", tmp);
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	tmp = RREG32_MC(RS480_GART_CACHE_CNTRL);
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	seq_printf(m, "GART_CACHE_CNTRL 0x%08x\n", tmp);
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	tmp = RREG32_MC(0x3B);
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	seq_printf(m, "MC_GART_ERROR_ADDRESS 0x%08x\n", tmp);
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	tmp = RREG32_MC(0x3C);
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	seq_printf(m, "MC_GART_ERROR_ADDRESS_HI 0x%08x\n", tmp);
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	tmp = RREG32_MC(0x30);
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	seq_printf(m, "GART_ERROR_0 0x%08x\n", tmp);
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	tmp = RREG32_MC(0x31);
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	seq_printf(m, "GART_ERROR_1 0x%08x\n", tmp);
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	tmp = RREG32_MC(0x32);
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	seq_printf(m, "GART_ERROR_2 0x%08x\n", tmp);
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	tmp = RREG32_MC(0x33);
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	seq_printf(m, "GART_ERROR_3 0x%08x\n", tmp);
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	tmp = RREG32_MC(0x34);
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	seq_printf(m, "GART_ERROR_4 0x%08x\n", tmp);
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	tmp = RREG32_MC(0x35);
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	seq_printf(m, "GART_ERROR_5 0x%08x\n", tmp);
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	tmp = RREG32_MC(0x36);
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	seq_printf(m, "GART_ERROR_6 0x%08x\n", tmp);
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	tmp = RREG32_MC(0x37);
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	seq_printf(m, "GART_ERROR_7 0x%08x\n", tmp);
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	return 0;
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}
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static struct drm_info_list rs400_gart_info_list[] = {
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	{"rs400_gart_info", rs400_debugfs_gart_info, 0, NULL},
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};
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#endif
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static int rs400_debugfs_pcie_gart_info_init(struct radeon_device *rdev)
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{
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#if defined(CONFIG_DEBUG_FS)
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	return radeon_debugfs_add_files(rdev, rs400_gart_info_list, 1);
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#else
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	return 0;
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#endif
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}
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static int rs400_mc_init(struct radeon_device *rdev)
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{
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	int r;
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	u32 tmp;
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	/* Setup GPU memory space */
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	tmp = G_00015C_MC_FB_START(RREG32(R_00015C_NB_TOM));
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	rdev->mc.vram_location = G_00015C_MC_FB_START(tmp) << 16;
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	rdev->mc.gtt_location = 0xFFFFFFFFUL;
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	r = radeon_mc_setup(rdev);
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	if (r)
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		return r;
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	return 0;
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}
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void rs400_mc_program(struct radeon_device *rdev)
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{
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	struct r100_mc_save save;
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	/* Stops all mc clients */
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	r100_mc_stop(rdev, &save);
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 | 
						|
	/* Wait for mc idle */
 | 
						|
	if (r300_mc_wait_for_idle(rdev))
 | 
						|
		dev_warn(rdev->dev, "Wait MC idle timeout before updating MC.\n");
 | 
						|
	WREG32(R_000148_MC_FB_LOCATION,
 | 
						|
		S_000148_MC_FB_START(rdev->mc.vram_start >> 16) |
 | 
						|
		S_000148_MC_FB_TOP(rdev->mc.vram_end >> 16));
 | 
						|
 | 
						|
	r100_mc_resume(rdev, &save);
 | 
						|
}
 | 
						|
 | 
						|
static int rs400_startup(struct radeon_device *rdev)
 | 
						|
{
 | 
						|
	int r;
 | 
						|
 | 
						|
	rs400_mc_program(rdev);
 | 
						|
	/* Resume clock */
 | 
						|
	r300_clock_startup(rdev);
 | 
						|
	/* Initialize GPU configuration (# pipes, ...) */
 | 
						|
	rs400_gpu_init(rdev);
 | 
						|
	/* Initialize GART (initialize after TTM so we can allocate
 | 
						|
	 * memory through TTM but finalize after TTM) */
 | 
						|
	r = rs400_gart_enable(rdev);
 | 
						|
	if (r)
 | 
						|
		return r;
 | 
						|
	/* Enable IRQ */
 | 
						|
	rdev->irq.sw_int = true;
 | 
						|
	r100_irq_set(rdev);
 | 
						|
	/* 1M ring buffer */
 | 
						|
	r = r100_cp_init(rdev, 1024 * 1024);
 | 
						|
	if (r) {
 | 
						|
		dev_err(rdev->dev, "failled initializing CP (%d).\n", r);
 | 
						|
		return r;
 | 
						|
	}
 | 
						|
	r = r100_wb_init(rdev);
 | 
						|
	if (r)
 | 
						|
		dev_err(rdev->dev, "failled initializing WB (%d).\n", r);
 | 
						|
	r = r100_ib_init(rdev);
 | 
						|
	if (r) {
 | 
						|
		dev_err(rdev->dev, "failled initializing IB (%d).\n", r);
 | 
						|
		return r;
 | 
						|
	}
 | 
						|
	return 0;
 | 
						|
}
 | 
						|
 | 
						|
int rs400_resume(struct radeon_device *rdev)
 | 
						|
{
 | 
						|
	/* Make sur GART are not working */
 | 
						|
	rs400_gart_disable(rdev);
 | 
						|
	/* Resume clock before doing reset */
 | 
						|
	r300_clock_startup(rdev);
 | 
						|
	/* setup MC before calling post tables */
 | 
						|
	rs400_mc_program(rdev);
 | 
						|
	/* Reset gpu before posting otherwise ATOM will enter infinite loop */
 | 
						|
	if (radeon_gpu_reset(rdev)) {
 | 
						|
		dev_warn(rdev->dev, "GPU reset failed ! (0xE40=0x%08X, 0x7C0=0x%08X)\n",
 | 
						|
			RREG32(R_000E40_RBBM_STATUS),
 | 
						|
			RREG32(R_0007C0_CP_STAT));
 | 
						|
	}
 | 
						|
	/* post */
 | 
						|
	radeon_combios_asic_init(rdev->ddev);
 | 
						|
	/* Resume clock after posting */
 | 
						|
	r300_clock_startup(rdev);
 | 
						|
	return rs400_startup(rdev);
 | 
						|
}
 | 
						|
 | 
						|
int rs400_suspend(struct radeon_device *rdev)
 | 
						|
{
 | 
						|
	r100_cp_disable(rdev);
 | 
						|
	r100_wb_disable(rdev);
 | 
						|
	r100_irq_disable(rdev);
 | 
						|
	rs400_gart_disable(rdev);
 | 
						|
	return 0;
 | 
						|
}
 | 
						|
 | 
						|
void rs400_fini(struct radeon_device *rdev)
 | 
						|
{
 | 
						|
	rs400_suspend(rdev);
 | 
						|
	r100_cp_fini(rdev);
 | 
						|
	r100_wb_fini(rdev);
 | 
						|
	r100_ib_fini(rdev);
 | 
						|
	radeon_gem_fini(rdev);
 | 
						|
	rs400_gart_fini(rdev);
 | 
						|
	radeon_irq_kms_fini(rdev);
 | 
						|
	radeon_fence_driver_fini(rdev);
 | 
						|
	radeon_object_fini(rdev);
 | 
						|
	radeon_atombios_fini(rdev);
 | 
						|
	kfree(rdev->bios);
 | 
						|
	rdev->bios = NULL;
 | 
						|
}
 | 
						|
 | 
						|
int rs400_init(struct radeon_device *rdev)
 | 
						|
{
 | 
						|
	int r;
 | 
						|
 | 
						|
	/* Disable VGA */
 | 
						|
	r100_vga_render_disable(rdev);
 | 
						|
	/* Initialize scratch registers */
 | 
						|
	radeon_scratch_init(rdev);
 | 
						|
	/* Initialize surface registers */
 | 
						|
	radeon_surface_init(rdev);
 | 
						|
	/* TODO: disable VGA need to use VGA request */
 | 
						|
	/* BIOS*/
 | 
						|
	if (!radeon_get_bios(rdev)) {
 | 
						|
		if (ASIC_IS_AVIVO(rdev))
 | 
						|
			return -EINVAL;
 | 
						|
	}
 | 
						|
	if (rdev->is_atom_bios) {
 | 
						|
		dev_err(rdev->dev, "Expecting combios for RS400/RS480 GPU\n");
 | 
						|
		return -EINVAL;
 | 
						|
	} else {
 | 
						|
		r = radeon_combios_init(rdev);
 | 
						|
		if (r)
 | 
						|
			return r;
 | 
						|
	}
 | 
						|
	/* Reset gpu before posting otherwise ATOM will enter infinite loop */
 | 
						|
	if (radeon_gpu_reset(rdev)) {
 | 
						|
		dev_warn(rdev->dev,
 | 
						|
			"GPU reset failed ! (0xE40=0x%08X, 0x7C0=0x%08X)\n",
 | 
						|
			RREG32(R_000E40_RBBM_STATUS),
 | 
						|
			RREG32(R_0007C0_CP_STAT));
 | 
						|
	}
 | 
						|
	/* check if cards are posted or not */
 | 
						|
	if (!radeon_card_posted(rdev) && rdev->bios) {
 | 
						|
		DRM_INFO("GPU not posted. posting now...\n");
 | 
						|
		radeon_combios_asic_init(rdev->ddev);
 | 
						|
	}
 | 
						|
	/* Initialize clocks */
 | 
						|
	radeon_get_clock_info(rdev->ddev);
 | 
						|
	/* Get vram informations */
 | 
						|
	rs400_vram_info(rdev);
 | 
						|
	/* Initialize memory controller (also test AGP) */
 | 
						|
	r = rs400_mc_init(rdev);
 | 
						|
	if (r)
 | 
						|
		return r;
 | 
						|
	/* Fence driver */
 | 
						|
	r = radeon_fence_driver_init(rdev);
 | 
						|
	if (r)
 | 
						|
		return r;
 | 
						|
	r = radeon_irq_kms_init(rdev);
 | 
						|
	if (r)
 | 
						|
		return r;
 | 
						|
	/* Memory manager */
 | 
						|
	r = radeon_object_init(rdev);
 | 
						|
	if (r)
 | 
						|
		return r;
 | 
						|
	r = rs400_gart_init(rdev);
 | 
						|
	if (r)
 | 
						|
		return r;
 | 
						|
	r300_set_reg_safe(rdev);
 | 
						|
	rdev->accel_working = true;
 | 
						|
	r = rs400_startup(rdev);
 | 
						|
	if (r) {
 | 
						|
		/* Somethings want wront with the accel init stop accel */
 | 
						|
		dev_err(rdev->dev, "Disabling GPU acceleration\n");
 | 
						|
		rs400_suspend(rdev);
 | 
						|
		r100_cp_fini(rdev);
 | 
						|
		r100_wb_fini(rdev);
 | 
						|
		r100_ib_fini(rdev);
 | 
						|
		rs400_gart_fini(rdev);
 | 
						|
		radeon_irq_kms_fini(rdev);
 | 
						|
		rdev->accel_working = false;
 | 
						|
	}
 | 
						|
	return 0;
 | 
						|
}
 |