drivers/gpu/drm/radeon/radeon_device.c - kernel/msm-4.9 - Gitiles

 /*
  * Copyright 2008 Advanced Micro Devices, Inc.
  * Copyright 2008 Red Hat Inc.
  * Copyright 2009 Jerome Glisse.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
  * to deal in the Software without restriction, including without limitation
  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  * and/or sell copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following conditions:
  *
  * The above copyright notice and this permission notice shall be included in
  * all copies or substantial portions of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  * OTHER DEALINGS IN THE SOFTWARE.
  *
  * Authors: Dave Airlie
  *          Alex Deucher
  *          Jerome Glisse
  */
 #include <linux/console.h>
 #include <drm/drmP.h>
 #include <drm/drm_crtc_helper.h>
 #include <drm/radeon_drm.h>
 #include "radeon_reg.h"
 #include "radeon.h"
 #include "radeon_asic.h"
 #include "atom.h"

 /*
  * Clear GPU surface registers.
  */
 static void radeon_surface_init(struct radeon_device *rdev)
 {
 	/* FIXME: check this out */
 	if (rdev->family < CHIP_R600) {
 		int i;

 		for (i = 0; i < 8; i++) {
 			WREG32(RADEON_SURFACE0_INFO +
 			       i * (RADEON_SURFACE1_INFO - RADEON_SURFACE0_INFO),
 			       0);
 		}
 		/* enable surfaces */
 		WREG32(RADEON_SURFACE_CNTL, 0);
 	}
 }

 /*
  * GPU scratch registers helpers function.
  */
 static void radeon_scratch_init(struct radeon_device *rdev)
 {
 	int i;

 	/* FIXME: check this out */
 	if (rdev->family < CHIP_R300) {
 		rdev->scratch.num_reg = 5;
 	} else {
 		rdev->scratch.num_reg = 7;
 	}
 	for (i = 0; i < rdev->scratch.num_reg; i++) {
 		rdev->scratch.free[i] = true;
 		rdev->scratch.reg[i] = RADEON_SCRATCH_REG0 + (i * 4);
 	}
 }

 int radeon_scratch_get(struct radeon_device *rdev, uint32_t *reg)
 {
 	int i;

 	for (i = 0; i < rdev->scratch.num_reg; i++) {
 		if (rdev->scratch.free[i]) {
 			rdev->scratch.free[i] = false;
 			*reg = rdev->scratch.reg[i];
 			return 0;
 		}
 	}
 	return -EINVAL;
 }

 void radeon_scratch_free(struct radeon_device *rdev, uint32_t reg)
 {
 	int i;

 	for (i = 0; i < rdev->scratch.num_reg; i++) {
 		if (rdev->scratch.reg[i] == reg) {
 			rdev->scratch.free[i] = true;
 			return;
 		}
 	}
 }

 /*
  * MC common functions
  */
 int radeon_mc_setup(struct radeon_device *rdev)
 {
 	uint32_t tmp;

 	/* Some chips have an "issue" with the memory controller, the
 	 * location must be aligned to the size. We just align it down,
 	 * too bad if we walk over the top of system memory, we don't
 	 * use DMA without a remapped anyway.
 	 * Affected chips are rv280, all r3xx, and all r4xx, but not IGP
 	 */
 	/* FGLRX seems to setup like this, VRAM a 0, then GART.
 	 */
 	/*
 	 * Note: from R6xx the address space is 40bits but here we only
 	 * use 32bits (still have to see a card which would exhaust 4G
 	 * address space).
 	 */
 	if (rdev->mc.vram_location != 0xFFFFFFFFUL) {
 		/* vram location was already setup try to put gtt after
 		 * if it fits */
 		tmp = rdev->mc.vram_location + rdev->mc.mc_vram_size;
 		tmp = (tmp + rdev->mc.gtt_size - 1) & ~(rdev->mc.gtt_size - 1);
 		if ((0xFFFFFFFFUL - tmp) >= rdev->mc.gtt_size) {
 			rdev->mc.gtt_location = tmp;
 		} else {
 			if (rdev->mc.gtt_size >= rdev->mc.vram_location) {
 				printk(KERN_ERR "[drm] GTT too big to fit "
 				       "before or after vram location.\n");
 				return -EINVAL;
 			}
 			rdev->mc.gtt_location = 0;
 		}
 	} else if (rdev->mc.gtt_location != 0xFFFFFFFFUL) {
 		/* gtt location was already setup try to put vram before
 		 * if it fits */
 		if (rdev->mc.mc_vram_size < rdev->mc.gtt_location) {
 			rdev->mc.vram_location = 0;
 		} else {
 			tmp = rdev->mc.gtt_location + rdev->mc.gtt_size;
 			tmp += (rdev->mc.mc_vram_size - 1);
 			tmp &= ~(rdev->mc.mc_vram_size - 1);
 			if ((0xFFFFFFFFUL - tmp) >= rdev->mc.mc_vram_size) {
 				rdev->mc.vram_location = tmp;
 			} else {
 				printk(KERN_ERR "[drm] vram too big to fit "
 				       "before or after GTT location.\n");
 				return -EINVAL;
 			}
 		}
 	} else {
 		rdev->mc.vram_location = 0;
 		tmp = rdev->mc.mc_vram_size;
 		tmp = (tmp + rdev->mc.gtt_size - 1) & ~(rdev->mc.gtt_size - 1);
 		rdev->mc.gtt_location = tmp;
 	}
 	DRM_INFO("radeon: VRAM %uM\n", rdev->mc.real_vram_size >> 20);
 	DRM_INFO("radeon: VRAM from 0x%08X to 0x%08X\n",
 		 rdev->mc.vram_location,
 		 rdev->mc.vram_location + rdev->mc.mc_vram_size - 1);
 	if (rdev->mc.real_vram_size != rdev->mc.mc_vram_size)
 		DRM_INFO("radeon: VRAM less than aperture workaround enabled\n");
 	DRM_INFO("radeon: GTT %uM\n", rdev->mc.gtt_size >> 20);
 	DRM_INFO("radeon: GTT from 0x%08X to 0x%08X\n",
 		 rdev->mc.gtt_location,
 		 rdev->mc.gtt_location + rdev->mc.gtt_size - 1);
 	return 0;
 }


 /*
  * GPU helpers function.
  */
 static bool radeon_card_posted(struct radeon_device *rdev)
 {
 	uint32_t reg;

 	/* first check CRTCs */
 	if (ASIC_IS_AVIVO(rdev)) {
 		reg = RREG32(AVIVO_D1CRTC_CONTROL) |
 		      RREG32(AVIVO_D2CRTC_CONTROL);
 		if (reg & AVIVO_CRTC_EN) {
 			return true;
 		}
 	} else {
 		reg = RREG32(RADEON_CRTC_GEN_CNTL) |
 		      RREG32(RADEON_CRTC2_GEN_CNTL);
 		if (reg & RADEON_CRTC_EN) {
 			return true;
 		}
 	}

 	/* then check MEM_SIZE, in case the crtcs are off */
 	if (rdev->family >= CHIP_R600)
 		reg = RREG32(R600_CONFIG_MEMSIZE);
 	else
 		reg = RREG32(RADEON_CONFIG_MEMSIZE);

 	if (reg)
 		return true;

 	return false;

 }


 /*
  * Registers accessors functions.
  */
 uint32_t radeon_invalid_rreg(struct radeon_device *rdev, uint32_t reg)
 {
 	DRM_ERROR("Invalid callback to read register 0x%04X\n", reg);
 	BUG_ON(1);
 	return 0;
 }

 void radeon_invalid_wreg(struct radeon_device *rdev, uint32_t reg, uint32_t v)
 {
 	DRM_ERROR("Invalid callback to write register 0x%04X with 0x%08X\n",
 		  reg, v);
 	BUG_ON(1);
 }

 void radeon_register_accessor_init(struct radeon_device *rdev)
 {
 	rdev->mm_rreg = &r100_mm_rreg;
 	rdev->mm_wreg = &r100_mm_wreg;
 	rdev->mc_rreg = &radeon_invalid_rreg;
 	rdev->mc_wreg = &radeon_invalid_wreg;
 	rdev->pll_rreg = &radeon_invalid_rreg;
 	rdev->pll_wreg = &radeon_invalid_wreg;
 	rdev->pcie_rreg = &radeon_invalid_rreg;
 	rdev->pcie_wreg = &radeon_invalid_wreg;
 	rdev->pciep_rreg = &radeon_invalid_rreg;
 	rdev->pciep_wreg = &radeon_invalid_wreg;

 	/* Don't change order as we are overridding accessor. */
 	if (rdev->family < CHIP_RV515) {
 		rdev->pcie_rreg = &rv370_pcie_rreg;
 		rdev->pcie_wreg = &rv370_pcie_wreg;
 	}
 	if (rdev->family >= CHIP_RV515) {
 		rdev->pcie_rreg = &rv515_pcie_rreg;
 		rdev->pcie_wreg = &rv515_pcie_wreg;
 	}
 	/* FIXME: not sure here */
 	if (rdev->family <= CHIP_R580) {
 		rdev->pll_rreg = &r100_pll_rreg;
 		rdev->pll_wreg = &r100_pll_wreg;
 	}
 	if (rdev->family >= CHIP_RV515) {
 		rdev->mc_rreg = &rv515_mc_rreg;
 		rdev->mc_wreg = &rv515_mc_wreg;
 	}
 	if (rdev->family == CHIP_RS400 || rdev->family == CHIP_RS480) {
 		rdev->mc_rreg = &rs400_mc_rreg;
 		rdev->mc_wreg = &rs400_mc_wreg;
 	}
 	if (rdev->family == CHIP_RS690 || rdev->family == CHIP_RS740) {
 		rdev->mc_rreg = &rs690_mc_rreg;
 		rdev->mc_wreg = &rs690_mc_wreg;
 	}
 	if (rdev->family == CHIP_RS600) {
 		rdev->mc_rreg = &rs600_mc_rreg;
 		rdev->mc_wreg = &rs600_mc_wreg;
 	}
 	if (rdev->family >= CHIP_R600) {
 		rdev->pciep_rreg = &r600_pciep_rreg;
 		rdev->pciep_wreg = &r600_pciep_wreg;
 	}
 }


 /*
  * ASIC
  */
 int radeon_asic_init(struct radeon_device *rdev)
 {
 	radeon_register_accessor_init(rdev);
 	switch (rdev->family) {
 	case CHIP_R100:
 	case CHIP_RV100:
 	case CHIP_RS100:
 	case CHIP_RV200:
 	case CHIP_RS200:
 	case CHIP_R200:
 	case CHIP_RV250:
 	case CHIP_RS300:
 	case CHIP_RV280:
 		rdev->asic = &r100_asic;
 		break;
 	case CHIP_R300:
 	case CHIP_R350:
 	case CHIP_RV350:
 	case CHIP_RV380:
 		rdev->asic = &r300_asic;
 		break;
 	case CHIP_R420:
 	case CHIP_R423:
 	case CHIP_RV410:
 		rdev->asic = &r420_asic;
 		break;
 	case CHIP_RS400:
 	case CHIP_RS480:
 		rdev->asic = &rs400_asic;
 		break;
 	case CHIP_RS600:
 		rdev->asic = &rs600_asic;
 		break;
 	case CHIP_RS690:
 	case CHIP_RS740:
 		rdev->asic = &rs690_asic;
 		break;
 	case CHIP_RV515:
 		rdev->asic = &rv515_asic;
 		break;
 	case CHIP_R520:
 	case CHIP_RV530:
 	case CHIP_RV560:
 	case CHIP_RV570:
 	case CHIP_R580:
 		rdev->asic = &r520_asic;
 		break;
 	case CHIP_R600:
 	case CHIP_RV610:
 	case CHIP_RV630:
 	case CHIP_RV620:
 	case CHIP_RV635:
 	case CHIP_RV670:
 	case CHIP_RS780:
 	case CHIP_RV770:
 	case CHIP_RV730:
 	case CHIP_RV710:
 	default:
 		/* FIXME: not supported yet */
 		return -EINVAL;
 	}
 	return 0;
 }


 /*
  * Wrapper around modesetting bits.
  */
 int radeon_clocks_init(struct radeon_device *rdev)
 {
 	int r;

 	radeon_get_clock_info(rdev->ddev);
 	r = radeon_static_clocks_init(rdev->ddev);
 	if (r) {
 		return r;
 	}
 	DRM_INFO("Clocks initialized !\n");
 	return 0;
 }

 void radeon_clocks_fini(struct radeon_device *rdev)
 {
 }

 /* ATOM accessor methods */
 static uint32_t cail_pll_read(struct card_info *info, uint32_t reg)
 {
 	struct radeon_device *rdev = info->dev->dev_private;
 	uint32_t r;

 	r = rdev->pll_rreg(rdev, reg);
 	return r;
 }

 static void cail_pll_write(struct card_info *info, uint32_t reg, uint32_t val)
 {
 	struct radeon_device *rdev = info->dev->dev_private;

 	rdev->pll_wreg(rdev, reg, val);
 }

 static uint32_t cail_mc_read(struct card_info *info, uint32_t reg)
 {
 	struct radeon_device *rdev = info->dev->dev_private;
 	uint32_t r;

 	r = rdev->mc_rreg(rdev, reg);
 	return r;
 }

 static void cail_mc_write(struct card_info *info, uint32_t reg, uint32_t val)
 {
 	struct radeon_device *rdev = info->dev->dev_private;

 	rdev->mc_wreg(rdev, reg, val);
 }

 static void cail_reg_write(struct card_info *info, uint32_t reg, uint32_t val)
 {
 	struct radeon_device *rdev = info->dev->dev_private;

 	WREG32(reg*4, val);
 }

 static uint32_t cail_reg_read(struct card_info *info, uint32_t reg)
 {
 	struct radeon_device *rdev = info->dev->dev_private;
 	uint32_t r;

 	r = RREG32(reg*4);
 	return r;
 }

 static struct card_info atom_card_info = {
 	.dev = NULL,
 	.reg_read = cail_reg_read,
 	.reg_write = cail_reg_write,
 	.mc_read = cail_mc_read,
 	.mc_write = cail_mc_write,
 	.pll_read = cail_pll_read,
 	.pll_write = cail_pll_write,
 };

 int radeon_atombios_init(struct radeon_device *rdev)
 {
 	atom_card_info.dev = rdev->ddev;
 	rdev->mode_info.atom_context = atom_parse(&atom_card_info, rdev->bios);
 	radeon_atom_initialize_bios_scratch_regs(rdev->ddev);
 	return 0;
 }

 void radeon_atombios_fini(struct radeon_device *rdev)
 {
 	kfree(rdev->mode_info.atom_context);
 }

 int radeon_combios_init(struct radeon_device *rdev)
 {
 	radeon_combios_initialize_bios_scratch_regs(rdev->ddev);
 	return 0;
 }

 void radeon_combios_fini(struct radeon_device *rdev)
 {
 }

 int radeon_modeset_init(struct radeon_device *rdev);
 void radeon_modeset_fini(struct radeon_device *rdev);


 /*
  * Radeon device.
  */
 int radeon_device_init(struct radeon_device *rdev,
 		       struct drm_device *ddev,
 		       struct pci_dev *pdev,
 		       uint32_t flags)
 {
 	int r, ret;
 	int dma_bits;

 	DRM_INFO("radeon: Initializing kernel modesetting.\n");
 	rdev->shutdown = false;
 	rdev->ddev = ddev;
 	rdev->pdev = pdev;
 	rdev->flags = flags;
 	rdev->family = flags & RADEON_FAMILY_MASK;
 	rdev->is_atom_bios = false;
 	rdev->usec_timeout = RADEON_MAX_USEC_TIMEOUT;
 	rdev->mc.gtt_size = radeon_gart_size * 1024 * 1024;
 	rdev->gpu_lockup = false;
 	/* mutex initialization are all done here so we
 	 * can recall function without having locking issues */
 	mutex_init(&rdev->cs_mutex);
 	mutex_init(&rdev->ib_pool.mutex);
 	mutex_init(&rdev->cp.mutex);
 	rwlock_init(&rdev->fence_drv.lock);

 	if (radeon_agpmode == -1) {
 		rdev->flags &= ~RADEON_IS_AGP;
 		if (rdev->family > CHIP_RV515 ||
 		    rdev->family == CHIP_RV380 ||
 		    rdev->family == CHIP_RV410 ||
 		    rdev->family == CHIP_R423) {
 			DRM_INFO("Forcing AGP to PCIE mode\n");
 			rdev->flags |= RADEON_IS_PCIE;
 		} else {
 			DRM_INFO("Forcing AGP to PCI mode\n");
 			rdev->flags |= RADEON_IS_PCI;
 		}
 	}

 	/* Set asic functions */
 	r = radeon_asic_init(rdev);
 	if (r) {
 		return r;
 	}
 	r = radeon_init(rdev);
 	if (r) {
 		return r;
 	}

 	/* set DMA mask + need_dma32 flags.
 	 * PCIE - can handle 40-bits.
 	 * IGP - can handle 40-bits (in theory)
 	 * AGP - generally dma32 is safest
 	 * PCI - only dma32
 	 */
 	rdev->need_dma32 = false;
 	if (rdev->flags & RADEON_IS_AGP)
 		rdev->need_dma32 = true;
 	if (rdev->flags & RADEON_IS_PCI)
 		rdev->need_dma32 = true;

 	dma_bits = rdev->need_dma32 ? 32 : 40;
 	r = pci_set_dma_mask(rdev->pdev, DMA_BIT_MASK(dma_bits));
 	if (r) {
 		printk(KERN_WARNING "radeon: No suitable DMA available.\n");
 	}

 	/* Registers mapping */
 	/* TODO: block userspace mapping of io register */
 	rdev->rmmio_base = drm_get_resource_start(rdev->ddev, 2);
 	rdev->rmmio_size = drm_get_resource_len(rdev->ddev, 2);
 	rdev->rmmio = ioremap(rdev->rmmio_base, rdev->rmmio_size);
 	if (rdev->rmmio == NULL) {
 		return -ENOMEM;
 	}
 	DRM_INFO("register mmio base: 0x%08X\n", (uint32_t)rdev->rmmio_base);
 	DRM_INFO("register mmio size: %u\n", (unsigned)rdev->rmmio_size);

 	/* Setup errata flags */
 	radeon_errata(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) {
 		r = radeon_atombios_init(rdev);
 		if (r) {
 			return r;
 		}
 	} 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)) {
 		/* FIXME: what do we want to do here ? */
 	}
 	/* check if cards are posted or not */
 	if (!radeon_card_posted(rdev) && rdev->bios) {
 		DRM_INFO("GPU not posted. posting now...\n");
 		if (rdev->is_atom_bios) {
 			atom_asic_init(rdev->mode_info.atom_context);
 		} else {
 			radeon_combios_asic_init(rdev->ddev);
 		}
 	}
 	/* Initialize clocks */
 	r = radeon_clocks_init(rdev);
 	if (r) {
 		return r;
 	}
 	/* Get vram informations */
 	radeon_vram_info(rdev);

 	/* Add an MTRR for the VRAM */
 	rdev->mc.vram_mtrr = mtrr_add(rdev->mc.aper_base, rdev->mc.aper_size,
 				      MTRR_TYPE_WRCOMB, 1);
 	DRM_INFO("Detected VRAM RAM=%uM, BAR=%uM\n",
 		 rdev->mc.real_vram_size >> 20,
 		 (unsigned)rdev->mc.aper_size >> 20);
 	DRM_INFO("RAM width %dbits %cDR\n",
 		 rdev->mc.vram_width, rdev->mc.vram_is_ddr ? 'D' : 'S');
 	/* Initialize memory controller (also test AGP) */
 	r = radeon_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;
 	}
 	/* Initialize GART (initialize after TTM so we can allocate
 	 * memory through TTM but finalize after TTM) */
 	r = radeon_gart_enable(rdev);
 	if (!r) {
 		r = radeon_gem_init(rdev);
 	}

 	/* 1M ring buffer */
 	if (!r) {
 		r = radeon_cp_init(rdev, 1024 * 1024);
 	}
 	if (!r) {
 		r = radeon_wb_init(rdev);
 		if (r) {
 			DRM_ERROR("radeon: failled initializing WB (%d).\n", r);
 			return r;
 		}
 	}
 	if (!r) {
 		r = radeon_ib_pool_init(rdev);
 		if (r) {
 			DRM_ERROR("radeon: failled initializing IB pool (%d).\n", r);
 			return r;
 		}
 	}
 	if (!r) {
 		r = radeon_ib_test(rdev);
 		if (r) {
 			DRM_ERROR("radeon: failled testing IB (%d).\n", r);
 			return r;
 		}
 	}
 	ret = r;
 	r = radeon_modeset_init(rdev);
 	if (r) {
 		return r;
 	}
 	if (!ret) {
 		DRM_INFO("radeon: kernel modesetting successfully initialized.\n");
 	}
 	if (radeon_testing) {
 		radeon_test_moves(rdev);
 	}
 	if (radeon_benchmarking) {
 		radeon_benchmark(rdev);
 	}
 	return ret;
 }

 void radeon_device_fini(struct radeon_device *rdev)
 {
 	if (rdev == NULL || rdev->rmmio == NULL) {
 		return;
 	}
 	DRM_INFO("radeon: finishing device.\n");
 	rdev->shutdown = true;
 	/* Order matter so becarefull if you rearrange anythings */
 	radeon_modeset_fini(rdev);
 	radeon_ib_pool_fini(rdev);
 	radeon_cp_fini(rdev);
 	radeon_wb_fini(rdev);
 	radeon_gem_fini(rdev);
 	radeon_object_fini(rdev);
 	/* mc_fini must be after object_fini */
 	radeon_mc_fini(rdev);
 #if __OS_HAS_AGP
 	radeon_agp_fini(rdev);
 #endif
 	radeon_irq_kms_fini(rdev);
 	radeon_fence_driver_fini(rdev);
 	radeon_clocks_fini(rdev);
 	if (rdev->is_atom_bios) {
 		radeon_atombios_fini(rdev);
 	} else {
 		radeon_combios_fini(rdev);
 	}
 	kfree(rdev->bios);
 	rdev->bios = NULL;
 	iounmap(rdev->rmmio);
 	rdev->rmmio = NULL;
 }


 /*
  * Suspend & resume.
  */
 int radeon_suspend_kms(struct drm_device *dev, pm_message_t state)
 {
 	struct radeon_device *rdev = dev->dev_private;
 	struct drm_crtc *crtc;

 	if (dev == NULL || rdev == NULL) {
 		return -ENODEV;
 	}
 	if (state.event == PM_EVENT_PRETHAW) {
 		return 0;
 	}
 	/* unpin the front buffers */
 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 		struct radeon_framebuffer *rfb = to_radeon_framebuffer(crtc->fb);
 		struct radeon_object *robj;

 		if (rfb == NULL || rfb->obj == NULL) {
 			continue;
 		}
 		robj = rfb->obj->driver_private;
 		if (robj != rdev->fbdev_robj) {
 			radeon_object_unpin(robj);
 		}
 	}
 	/* evict vram memory */
 	radeon_object_evict_vram(rdev);
 	/* wait for gpu to finish processing current batch */
 	radeon_fence_wait_last(rdev);

 	radeon_cp_disable(rdev);
 	radeon_gart_disable(rdev);

 	/* evict remaining vram memory */
 	radeon_object_evict_vram(rdev);

 	rdev->irq.sw_int = false;
 	radeon_irq_set(rdev);

 	pci_save_state(dev->pdev);
 	if (state.event == PM_EVENT_SUSPEND) {
 		/* Shut down the device */
 		pci_disable_device(dev->pdev);
 		pci_set_power_state(dev->pdev, PCI_D3hot);
 	}
 	acquire_console_sem();
 	fb_set_suspend(rdev->fbdev_info, 1);
 	release_console_sem();
 	return 0;
 }

 int radeon_resume_kms(struct drm_device *dev)
 {
 	struct radeon_device *rdev = dev->dev_private;
 	int r;

 	acquire_console_sem();
 	pci_set_power_state(dev->pdev, PCI_D0);
 	pci_restore_state(dev->pdev);
 	if (pci_enable_device(dev->pdev)) {
 		release_console_sem();
 		return -1;
 	}
 	pci_set_master(dev->pdev);
 	/* Reset gpu before posting otherwise ATOM will enter infinite loop */
 	if (radeon_gpu_reset(rdev)) {
 		/* FIXME: what do we want to do here ? */
 	}
 	/* post card */
 	if (rdev->is_atom_bios) {
 		atom_asic_init(rdev->mode_info.atom_context);
 	} else {
 		radeon_combios_asic_init(rdev->ddev);
 	}
 	/* Initialize clocks */
 	r = radeon_clocks_init(rdev);
 	if (r) {
 		release_console_sem();
 		return r;
 	}
 	/* Enable IRQ */
 	rdev->irq.sw_int = true;
 	radeon_irq_set(rdev);
 	/* Initialize GPU Memory Controller */
 	r = radeon_mc_init(rdev);
 	if (r) {
 		goto out;
 	}
 	r = radeon_gart_enable(rdev);
 	if (r) {
 		goto out;
 	}
 	r = radeon_cp_init(rdev, rdev->cp.ring_size);
 	if (r) {
 		goto out;
 	}
 out:
 	fb_set_suspend(rdev->fbdev_info, 0);
 	release_console_sem();

 	/* blat the mode back in */
 	drm_helper_resume_force_mode(dev);
 	return 0;
 }


 /*
  * Debugfs
  */
 struct radeon_debugfs {
 	struct drm_info_list	*files;
 	unsigned		num_files;
 };
 static struct radeon_debugfs _radeon_debugfs[RADEON_DEBUGFS_MAX_NUM_FILES];
 static unsigned _radeon_debugfs_count = 0;

 int radeon_debugfs_add_files(struct radeon_device *rdev,
 			     struct drm_info_list *files,
 			     unsigned nfiles)
 {
 	unsigned i;

 	for (i = 0; i < _radeon_debugfs_count; i++) {
 		if (_radeon_debugfs[i].files == files) {
 			/* Already registered */
 			return 0;
 		}
 	}
 	if ((_radeon_debugfs_count + nfiles) > RADEON_DEBUGFS_MAX_NUM_FILES) {
 		DRM_ERROR("Reached maximum number of debugfs files.\n");
 		DRM_ERROR("Report so we increase RADEON_DEBUGFS_MAX_NUM_FILES.\n");
 		return -EINVAL;
 	}
 	_radeon_debugfs[_radeon_debugfs_count].files = files;
 	_radeon_debugfs[_radeon_debugfs_count].num_files = nfiles;
 	_radeon_debugfs_count++;
 #if defined(CONFIG_DEBUG_FS)
 	drm_debugfs_create_files(files, nfiles,
 				 rdev->ddev->control->debugfs_root,
 				 rdev->ddev->control);
 	drm_debugfs_create_files(files, nfiles,
 				 rdev->ddev->primary->debugfs_root,
 				 rdev->ddev->primary);
 #endif
 	return 0;
 }

 #if defined(CONFIG_DEBUG_FS)
 int radeon_debugfs_init(struct drm_minor *minor)
 {
 	return 0;
 }

 void radeon_debugfs_cleanup(struct drm_minor *minor)
 {
 	unsigned i;

 	for (i = 0; i < _radeon_debugfs_count; i++) {
 		drm_debugfs_remove_files(_radeon_debugfs[i].files,
 					 _radeon_debugfs[i].num_files, minor);
 	}
 }
 #endif
	/*
	* Copyright 2008 Advanced Micro Devices, Inc.
	* Copyright 2008 Red Hat Inc.
	* Copyright 2009 Jerome Glisse.
	*
	* Permission is hereby granted, free of charge, to any person obtaining a
	* copy of this software and associated documentation files (the "Software"),
	* to deal in the Software without restriction, including without limitation
	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	* and/or sell copies of the Software, and to permit persons to whom the
	* Software is furnished to do so, subject to the following conditions:
	*
	* The above copyright notice and this permission notice shall be included in
	* all copies or substantial portions of the Software.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
	* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
	* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
	* OTHER DEALINGS IN THE SOFTWARE.
	*
	* Authors: Dave Airlie
	* Alex Deucher
	* Jerome Glisse
	*/
	#include <linux/console.h>
	#include <drm/drmP.h>
	#include <drm/drm_crtc_helper.h>
	#include <drm/radeon_drm.h>
	#include "radeon_reg.h"
	#include "radeon.h"
	#include "radeon_asic.h"
	#include "atom.h"

	/*
	* Clear GPU surface registers.
	*/
	static void radeon_surface_init(struct radeon_device *rdev)
	{
	/* FIXME: check this out */
	if (rdev->family < CHIP_R600) {
	int i;

	for (i = 0; i < 8; i++) {
	WREG32(RADEON_SURFACE0_INFO +
	i * (RADEON_SURFACE1_INFO - RADEON_SURFACE0_INFO),
	0);
	}
	/* enable surfaces */
	WREG32(RADEON_SURFACE_CNTL, 0);
	}
	}

	/*
	* GPU scratch registers helpers function.
	*/
	static void radeon_scratch_init(struct radeon_device *rdev)
	{
	int i;

	/* FIXME: check this out */
	if (rdev->family < CHIP_R300) {
	rdev->scratch.num_reg = 5;
	} else {
	rdev->scratch.num_reg = 7;
	}
	for (i = 0; i < rdev->scratch.num_reg; i++) {
	rdev->scratch.free[i] = true;
	rdev->scratch.reg[i] = RADEON_SCRATCH_REG0 + (i * 4);
	}
	}

	int radeon_scratch_get(struct radeon_device rdev, uint32_t reg)
	{
	int i;

	for (i = 0; i < rdev->scratch.num_reg; i++) {
	if (rdev->scratch.free[i]) {
	rdev->scratch.free[i] = false;
	*reg = rdev->scratch.reg[i];
	return 0;
	}
	}
	return -EINVAL;
	}

	void radeon_scratch_free(struct radeon_device *rdev, uint32_t reg)
	{
	int i;

	for (i = 0; i < rdev->scratch.num_reg; i++) {
	if (rdev->scratch.reg[i] == reg) {
	rdev->scratch.free[i] = true;
	return;
	}
	}
	}

	/*
	* MC common functions
	*/
	int radeon_mc_setup(struct radeon_device *rdev)
	{
	uint32_t tmp;

	/* Some chips have an "issue" with the memory controller, the
	* location must be aligned to the size. We just align it down,
	* too bad if we walk over the top of system memory, we don't
	* use DMA without a remapped anyway.
	* Affected chips are rv280, all r3xx, and all r4xx, but not IGP
	*/
	/* FGLRX seems to setup like this, VRAM a 0, then GART.
	*/
	/*
	* Note: from R6xx the address space is 40bits but here we only
	* use 32bits (still have to see a card which would exhaust 4G
	* address space).
	*/
	if (rdev->mc.vram_location != 0xFFFFFFFFUL) {
	/* vram location was already setup try to put gtt after
	* if it fits */
	tmp = rdev->mc.vram_location + rdev->mc.mc_vram_size;
	tmp = (tmp + rdev->mc.gtt_size - 1) & ~(rdev->mc.gtt_size - 1);
	if ((0xFFFFFFFFUL - tmp) >= rdev->mc.gtt_size) {
	rdev->mc.gtt_location = tmp;
	} else {
	if (rdev->mc.gtt_size >= rdev->mc.vram_location) {
	printk(KERN_ERR "[drm] GTT too big to fit "
	"before or after vram location.\n");
	return -EINVAL;
	}
	rdev->mc.gtt_location = 0;
	}
	} else if (rdev->mc.gtt_location != 0xFFFFFFFFUL) {
	/* gtt location was already setup try to put vram before
	* if it fits */
	if (rdev->mc.mc_vram_size < rdev->mc.gtt_location) {
	rdev->mc.vram_location = 0;
	} else {
	tmp = rdev->mc.gtt_location + rdev->mc.gtt_size;
	tmp += (rdev->mc.mc_vram_size - 1);
	tmp &= ~(rdev->mc.mc_vram_size - 1);
	if ((0xFFFFFFFFUL - tmp) >= rdev->mc.mc_vram_size) {
	rdev->mc.vram_location = tmp;
	} else {
	printk(KERN_ERR "[drm] vram too big to fit "
	"before or after GTT location.\n");
	return -EINVAL;
	}
	}
	} else {
	rdev->mc.vram_location = 0;
	tmp = rdev->mc.mc_vram_size;
	tmp = (tmp + rdev->mc.gtt_size - 1) & ~(rdev->mc.gtt_size - 1);
	rdev->mc.gtt_location = tmp;
	}
	DRM_INFO("radeon: VRAM %uM\n", rdev->mc.real_vram_size >> 20);
	DRM_INFO("radeon: VRAM from 0x%08X to 0x%08X\n",
	rdev->mc.vram_location,
	rdev->mc.vram_location + rdev->mc.mc_vram_size - 1);
	if (rdev->mc.real_vram_size != rdev->mc.mc_vram_size)
	DRM_INFO("radeon: VRAM less than aperture workaround enabled\n");
	DRM_INFO("radeon: GTT %uM\n", rdev->mc.gtt_size >> 20);
	DRM_INFO("radeon: GTT from 0x%08X to 0x%08X\n",
	rdev->mc.gtt_location,
	rdev->mc.gtt_location + rdev->mc.gtt_size - 1);
	return 0;
	}


	/*
	* GPU helpers function.
	*/
	static bool radeon_card_posted(struct radeon_device *rdev)
	{
	uint32_t reg;

	/* first check CRTCs */
	if (ASIC_IS_AVIVO(rdev)) {
	reg = RREG32(AVIVO_D1CRTC_CONTROL) \|
	RREG32(AVIVO_D2CRTC_CONTROL);
	if (reg & AVIVO_CRTC_EN) {
	return true;
	}
	} else {
	reg = RREG32(RADEON_CRTC_GEN_CNTL) \|
	RREG32(RADEON_CRTC2_GEN_CNTL);
	if (reg & RADEON_CRTC_EN) {
	return true;
	}
	}

	/* then check MEM_SIZE, in case the crtcs are off */
	if (rdev->family >= CHIP_R600)
	reg = RREG32(R600_CONFIG_MEMSIZE);
	else
	reg = RREG32(RADEON_CONFIG_MEMSIZE);

	if (reg)
	return true;

	return false;

	}


	/*
	* Registers accessors functions.
	*/
	uint32_t radeon_invalid_rreg(struct radeon_device *rdev, uint32_t reg)
	{
	DRM_ERROR("Invalid callback to read register 0x%04X\n", reg);
	BUG_ON(1);
	return 0;
	}

	void radeon_invalid_wreg(struct radeon_device *rdev, uint32_t reg, uint32_t v)
	{
	DRM_ERROR("Invalid callback to write register 0x%04X with 0x%08X\n",
	reg, v);
	BUG_ON(1);
	}

	void radeon_register_accessor_init(struct radeon_device *rdev)
	{
	rdev->mm_rreg = &r100_mm_rreg;
	rdev->mm_wreg = &r100_mm_wreg;
	rdev->mc_rreg = &radeon_invalid_rreg;
	rdev->mc_wreg = &radeon_invalid_wreg;
	rdev->pll_rreg = &radeon_invalid_rreg;
	rdev->pll_wreg = &radeon_invalid_wreg;
	rdev->pcie_rreg = &radeon_invalid_rreg;
	rdev->pcie_wreg = &radeon_invalid_wreg;
	rdev->pciep_rreg = &radeon_invalid_rreg;
	rdev->pciep_wreg = &radeon_invalid_wreg;

	/* Don't change order as we are overridding accessor. */
	if (rdev->family < CHIP_RV515) {
	rdev->pcie_rreg = &rv370_pcie_rreg;
	rdev->pcie_wreg = &rv370_pcie_wreg;
	}
	if (rdev->family >= CHIP_RV515) {
	rdev->pcie_rreg = &rv515_pcie_rreg;
	rdev->pcie_wreg = &rv515_pcie_wreg;
	}
	/* FIXME: not sure here */
	if (rdev->family <= CHIP_R580) {
	rdev->pll_rreg = &r100_pll_rreg;
	rdev->pll_wreg = &r100_pll_wreg;
	}
	if (rdev->family >= CHIP_RV515) {
	rdev->mc_rreg = &rv515_mc_rreg;
	rdev->mc_wreg = &rv515_mc_wreg;
	}
	if (rdev->family == CHIP_RS400 \|\| rdev->family == CHIP_RS480) {
	rdev->mc_rreg = &rs400_mc_rreg;
	rdev->mc_wreg = &rs400_mc_wreg;
	}
	if (rdev->family == CHIP_RS690 \|\| rdev->family == CHIP_RS740) {
	rdev->mc_rreg = &rs690_mc_rreg;
	rdev->mc_wreg = &rs690_mc_wreg;
	}
	if (rdev->family == CHIP_RS600) {
	rdev->mc_rreg = &rs600_mc_rreg;
	rdev->mc_wreg = &rs600_mc_wreg;
	}
	if (rdev->family >= CHIP_R600) {
	rdev->pciep_rreg = &r600_pciep_rreg;
	rdev->pciep_wreg = &r600_pciep_wreg;
	}
	}


	/*
	* ASIC
	*/
	int radeon_asic_init(struct radeon_device *rdev)
	{
	radeon_register_accessor_init(rdev);
	switch (rdev->family) {
	case CHIP_R100:
	case CHIP_RV100:
	case CHIP_RS100:
	case CHIP_RV200:
	case CHIP_RS200:
	case CHIP_R200:
	case CHIP_RV250:
	case CHIP_RS300:
	case CHIP_RV280:
	rdev->asic = &r100_asic;
	break;
	case CHIP_R300:
	case CHIP_R350:
	case CHIP_RV350:
	case CHIP_RV380:
	rdev->asic = &r300_asic;
	break;
	case CHIP_R420:
	case CHIP_R423:
	case CHIP_RV410:
	rdev->asic = &r420_asic;
	break;
	case CHIP_RS400:
	case CHIP_RS480:
	rdev->asic = &rs400_asic;
	break;
	case CHIP_RS600:
	rdev->asic = &rs600_asic;
	break;
	case CHIP_RS690:
	case CHIP_RS740:
	rdev->asic = &rs690_asic;
	break;
	case CHIP_RV515:
	rdev->asic = &rv515_asic;
	break;
	case CHIP_R520:
	case CHIP_RV530:
	case CHIP_RV560:
	case CHIP_RV570:
	case CHIP_R580:
	rdev->asic = &r520_asic;
	break;
	case CHIP_R600:
	case CHIP_RV610:
	case CHIP_RV630:
	case CHIP_RV620:
	case CHIP_RV635:
	case CHIP_RV670:
	case CHIP_RS780:
	case CHIP_RV770:
	case CHIP_RV730:
	case CHIP_RV710:
	default:
	/* FIXME: not supported yet */
	return -EINVAL;
	}
	return 0;
	}


	/*
	* Wrapper around modesetting bits.
	*/
	int radeon_clocks_init(struct radeon_device *rdev)
	{
	int r;

	radeon_get_clock_info(rdev->ddev);
	r = radeon_static_clocks_init(rdev->ddev);
	if (r) {
	return r;
	}
	DRM_INFO("Clocks initialized !\n");
	return 0;
	}

	void radeon_clocks_fini(struct radeon_device *rdev)
	{
	}

	/* ATOM accessor methods */
	static uint32_t cail_pll_read(struct card_info *info, uint32_t reg)
	{
	struct radeon_device *rdev = info->dev->dev_private;
	uint32_t r;

	r = rdev->pll_rreg(rdev, reg);
	return r;
	}

	static void cail_pll_write(struct card_info *info, uint32_t reg, uint32_t val)
	{
	struct radeon_device *rdev = info->dev->dev_private;

	rdev->pll_wreg(rdev, reg, val);
	}

	static uint32_t cail_mc_read(struct card_info *info, uint32_t reg)
	{
	struct radeon_device *rdev = info->dev->dev_private;
	uint32_t r;

	r = rdev->mc_rreg(rdev, reg);
	return r;
	}

	static void cail_mc_write(struct card_info *info, uint32_t reg, uint32_t val)
	{
	struct radeon_device *rdev = info->dev->dev_private;

	rdev->mc_wreg(rdev, reg, val);
	}

	static void cail_reg_write(struct card_info *info, uint32_t reg, uint32_t val)
	{
	struct radeon_device *rdev = info->dev->dev_private;

	WREG32(reg*4, val);
	}

	static uint32_t cail_reg_read(struct card_info *info, uint32_t reg)
	{
	struct radeon_device *rdev = info->dev->dev_private;
	uint32_t r;

	r = RREG32(reg*4);
	return r;
	}

	static struct card_info atom_card_info = {
	.dev = NULL,
	.reg_read = cail_reg_read,
	.reg_write = cail_reg_write,
	.mc_read = cail_mc_read,
	.mc_write = cail_mc_write,
	.pll_read = cail_pll_read,
	.pll_write = cail_pll_write,
	};

	int radeon_atombios_init(struct radeon_device *rdev)
	{
	atom_card_info.dev = rdev->ddev;
	rdev->mode_info.atom_context = atom_parse(&atom_card_info, rdev->bios);
	radeon_atom_initialize_bios_scratch_regs(rdev->ddev);
	return 0;
	}

	void radeon_atombios_fini(struct radeon_device *rdev)
	{
	kfree(rdev->mode_info.atom_context);
	}

	int radeon_combios_init(struct radeon_device *rdev)
	{
	radeon_combios_initialize_bios_scratch_regs(rdev->ddev);
	return 0;
	}

	void radeon_combios_fini(struct radeon_device *rdev)
	{
	}

	int radeon_modeset_init(struct radeon_device *rdev);
	void radeon_modeset_fini(struct radeon_device *rdev);


	/*
	* Radeon device.
	*/
	int radeon_device_init(struct radeon_device *rdev,
	struct drm_device *ddev,
	struct pci_dev *pdev,
	uint32_t flags)
	{
	int r, ret;
	int dma_bits;

	DRM_INFO("radeon: Initializing kernel modesetting.\n");
	rdev->shutdown = false;
	rdev->ddev = ddev;
	rdev->pdev = pdev;
	rdev->flags = flags;
	rdev->family = flags & RADEON_FAMILY_MASK;
	rdev->is_atom_bios = false;
	rdev->usec_timeout = RADEON_MAX_USEC_TIMEOUT;
	rdev->mc.gtt_size = radeon_gart_size * 1024 * 1024;
	rdev->gpu_lockup = false;
	/* mutex initialization are all done here so we
	* can recall function without having locking issues */
	mutex_init(&rdev->cs_mutex);
	mutex_init(&rdev->ib_pool.mutex);
	mutex_init(&rdev->cp.mutex);
	rwlock_init(&rdev->fence_drv.lock);

	if (radeon_agpmode == -1) {
	rdev->flags &= ~RADEON_IS_AGP;
	if (rdev->family > CHIP_RV515 \|\|
	rdev->family == CHIP_RV380 \|\|
	rdev->family == CHIP_RV410 \|\|
	rdev->family == CHIP_R423) {
	DRM_INFO("Forcing AGP to PCIE mode\n");
	rdev->flags \|= RADEON_IS_PCIE;
	} else {
	DRM_INFO("Forcing AGP to PCI mode\n");
	rdev->flags \|= RADEON_IS_PCI;
	}
	}

	/* Set asic functions */
	r = radeon_asic_init(rdev);
	if (r) {
	return r;
	}
	r = radeon_init(rdev);
	if (r) {
	return r;
	}

	/* set DMA mask + need_dma32 flags.
	* PCIE - can handle 40-bits.
	* IGP - can handle 40-bits (in theory)
	* AGP - generally dma32 is safest
	* PCI - only dma32
	*/
	rdev->need_dma32 = false;
	if (rdev->flags & RADEON_IS_AGP)
	rdev->need_dma32 = true;
	if (rdev->flags & RADEON_IS_PCI)
	rdev->need_dma32 = true;

	dma_bits = rdev->need_dma32 ? 32 : 40;
	r = pci_set_dma_mask(rdev->pdev, DMA_BIT_MASK(dma_bits));
	if (r) {
	printk(KERN_WARNING "radeon: No suitable DMA available.\n");
	}

	/* Registers mapping */
	/* TODO: block userspace mapping of io register */
	rdev->rmmio_base = drm_get_resource_start(rdev->ddev, 2);
	rdev->rmmio_size = drm_get_resource_len(rdev->ddev, 2);
	rdev->rmmio = ioremap(rdev->rmmio_base, rdev->rmmio_size);
	if (rdev->rmmio == NULL) {
	return -ENOMEM;
	}
	DRM_INFO("register mmio base: 0x%08X\n", (uint32_t)rdev->rmmio_base);
	DRM_INFO("register mmio size: %u\n", (unsigned)rdev->rmmio_size);

	/* Setup errata flags */
	radeon_errata(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) {
	r = radeon_atombios_init(rdev);
	if (r) {
	return r;
	}
	} 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)) {
	/* FIXME: what do we want to do here ? */
	}
	/* check if cards are posted or not */
	if (!radeon_card_posted(rdev) && rdev->bios) {
	DRM_INFO("GPU not posted. posting now...\n");
	if (rdev->is_atom_bios) {
	atom_asic_init(rdev->mode_info.atom_context);
	} else {
	radeon_combios_asic_init(rdev->ddev);
	}
	}
	/* Initialize clocks */
	r = radeon_clocks_init(rdev);
	if (r) {
	return r;
	}
	/* Get vram informations */
	radeon_vram_info(rdev);

	/* Add an MTRR for the VRAM */
	rdev->mc.vram_mtrr = mtrr_add(rdev->mc.aper_base, rdev->mc.aper_size,
	MTRR_TYPE_WRCOMB, 1);
	DRM_INFO("Detected VRAM RAM=%uM, BAR=%uM\n",
	rdev->mc.real_vram_size >> 20,
	(unsigned)rdev->mc.aper_size >> 20);
	DRM_INFO("RAM width %dbits %cDR\n",
	rdev->mc.vram_width, rdev->mc.vram_is_ddr ? 'D' : 'S');
	/* Initialize memory controller (also test AGP) */
	r = radeon_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;
	}
	/* Initialize GART (initialize after TTM so we can allocate
	* memory through TTM but finalize after TTM) */
	r = radeon_gart_enable(rdev);
	if (!r) {
	r = radeon_gem_init(rdev);
	}

	/* 1M ring buffer */
	if (!r) {
	r = radeon_cp_init(rdev, 1024 * 1024);
	}
	if (!r) {
	r = radeon_wb_init(rdev);
	if (r) {
	DRM_ERROR("radeon: failled initializing WB (%d).\n", r);
	return r;
	}
	}
	if (!r) {
	r = radeon_ib_pool_init(rdev);
	if (r) {
	DRM_ERROR("radeon: failled initializing IB pool (%d).\n", r);
	return r;
	}
	}
	if (!r) {
	r = radeon_ib_test(rdev);
	if (r) {
	DRM_ERROR("radeon: failled testing IB (%d).\n", r);
	return r;
	}
	}
	ret = r;
	r = radeon_modeset_init(rdev);
	if (r) {
	return r;
	}
	if (!ret) {
	DRM_INFO("radeon: kernel modesetting successfully initialized.\n");
	}
	if (radeon_testing) {
	radeon_test_moves(rdev);
	}
	if (radeon_benchmarking) {
	radeon_benchmark(rdev);
	}
	return ret;
	}

	void radeon_device_fini(struct radeon_device *rdev)
	{
	if (rdev == NULL \|\| rdev->rmmio == NULL) {
	return;
	}
	DRM_INFO("radeon: finishing device.\n");
	rdev->shutdown = true;
	/* Order matter so becarefull if you rearrange anythings */
	radeon_modeset_fini(rdev);
	radeon_ib_pool_fini(rdev);
	radeon_cp_fini(rdev);
	radeon_wb_fini(rdev);
	radeon_gem_fini(rdev);
	radeon_object_fini(rdev);
	/* mc_fini must be after object_fini */
	radeon_mc_fini(rdev);
	#if __OS_HAS_AGP
	radeon_agp_fini(rdev);
	#endif
	radeon_irq_kms_fini(rdev);
	radeon_fence_driver_fini(rdev);
	radeon_clocks_fini(rdev);
	if (rdev->is_atom_bios) {
	radeon_atombios_fini(rdev);
	} else {
	radeon_combios_fini(rdev);
	}
	kfree(rdev->bios);
	rdev->bios = NULL;
	iounmap(rdev->rmmio);
	rdev->rmmio = NULL;
	}


	/*
	* Suspend & resume.
	*/
	int radeon_suspend_kms(struct drm_device *dev, pm_message_t state)
	{
	struct radeon_device *rdev = dev->dev_private;
	struct drm_crtc *crtc;

	if (dev == NULL \|\| rdev == NULL) {
	return -ENODEV;
	}
	if (state.event == PM_EVENT_PRETHAW) {
	return 0;
	}
	/* unpin the front buffers */
	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
	struct radeon_framebuffer *rfb = to_radeon_framebuffer(crtc->fb);
	struct radeon_object *robj;

	if (rfb == NULL \|\| rfb->obj == NULL) {
	continue;
	}
	robj = rfb->obj->driver_private;
	if (robj != rdev->fbdev_robj) {
	radeon_object_unpin(robj);
	}
	}
	/* evict vram memory */
	radeon_object_evict_vram(rdev);
	/* wait for gpu to finish processing current batch */
	radeon_fence_wait_last(rdev);

	radeon_cp_disable(rdev);
	radeon_gart_disable(rdev);

	/* evict remaining vram memory */
	radeon_object_evict_vram(rdev);

	rdev->irq.sw_int = false;
	radeon_irq_set(rdev);

	pci_save_state(dev->pdev);
	if (state.event == PM_EVENT_SUSPEND) {
	/* Shut down the device */
	pci_disable_device(dev->pdev);
	pci_set_power_state(dev->pdev, PCI_D3hot);
	}
	acquire_console_sem();
	fb_set_suspend(rdev->fbdev_info, 1);
	release_console_sem();
	return 0;
	}

	int radeon_resume_kms(struct drm_device *dev)
	{
	struct radeon_device *rdev = dev->dev_private;
	int r;

	acquire_console_sem();
	pci_set_power_state(dev->pdev, PCI_D0);
	pci_restore_state(dev->pdev);
	if (pci_enable_device(dev->pdev)) {
	release_console_sem();
	return -1;
	}
	pci_set_master(dev->pdev);
	/* Reset gpu before posting otherwise ATOM will enter infinite loop */
	if (radeon_gpu_reset(rdev)) {
	/* FIXME: what do we want to do here ? */
	}
	/* post card */
	if (rdev->is_atom_bios) {
	atom_asic_init(rdev->mode_info.atom_context);
	} else {
	radeon_combios_asic_init(rdev->ddev);
	}
	/* Initialize clocks */
	r = radeon_clocks_init(rdev);
	if (r) {
	release_console_sem();
	return r;
	}
	/* Enable IRQ */
	rdev->irq.sw_int = true;
	radeon_irq_set(rdev);
	/* Initialize GPU Memory Controller */
	r = radeon_mc_init(rdev);
	if (r) {
	goto out;
	}
	r = radeon_gart_enable(rdev);
	if (r) {
	goto out;
	}
	r = radeon_cp_init(rdev, rdev->cp.ring_size);
	if (r) {
	goto out;
	}
	out:
	fb_set_suspend(rdev->fbdev_info, 0);
	release_console_sem();

	/* blat the mode back in */
	drm_helper_resume_force_mode(dev);
	return 0;
	}


	/*
	* Debugfs
	*/
	struct radeon_debugfs {
	struct drm_info_list *files;
	unsigned num_files;
	};
	static struct radeon_debugfs _radeon_debugfs[RADEON_DEBUGFS_MAX_NUM_FILES];
	static unsigned _radeon_debugfs_count = 0;

	int radeon_debugfs_add_files(struct radeon_device *rdev,
	struct drm_info_list *files,
	unsigned nfiles)
	{
	unsigned i;

	for (i = 0; i < _radeon_debugfs_count; i++) {
	if (_radeon_debugfs[i].files == files) {
	/* Already registered */
	return 0;
	}
	}
	if ((_radeon_debugfs_count + nfiles) > RADEON_DEBUGFS_MAX_NUM_FILES) {
	DRM_ERROR("Reached maximum number of debugfs files.\n");
	DRM_ERROR("Report so we increase RADEON_DEBUGFS_MAX_NUM_FILES.\n");
	return -EINVAL;
	}
	_radeon_debugfs[_radeon_debugfs_count].files = files;
	_radeon_debugfs[_radeon_debugfs_count].num_files = nfiles;
	_radeon_debugfs_count++;
	#if defined(CONFIG_DEBUG_FS)
	drm_debugfs_create_files(files, nfiles,
	rdev->ddev->control->debugfs_root,
	rdev->ddev->control);
	drm_debugfs_create_files(files, nfiles,
	rdev->ddev->primary->debugfs_root,
	rdev->ddev->primary);
	#endif
	return 0;
	}

	#if defined(CONFIG_DEBUG_FS)
	int radeon_debugfs_init(struct drm_minor *minor)
	{
	return 0;
	}

	void radeon_debugfs_cleanup(struct drm_minor *minor)
	{
	unsigned i;

	for (i = 0; i < _radeon_debugfs_count; i++) {
	drm_debugfs_remove_files(_radeon_debugfs[i].files,
	_radeon_debugfs[i].num_files, minor);
	}
	}
	#endif