C++ RREG32函数代码示例

/**
 * cik_sdma_get_rptr - get the current read pointer
 *
 * @rdev: radeon_device pointer
 * @ring: radeon ring pointer
 *
 * Get the current rptr from the hardware (CIK+).
 */
uint32_t cik_sdma_get_rptr(struct radeon_device *rdev,
			   struct radeon_ring *ring)
{
	u32 rptr, reg;

	if (rdev->wb.enabled) {
		rptr = rdev->wb.wb[ring->rptr_offs/4];
	} else {
		if (ring->idx == R600_RING_TYPE_DMA_INDEX)
			reg = SDMA0_GFX_RB_RPTR + SDMA0_REGISTER_OFFSET;
		else
			reg = SDMA0_GFX_RB_RPTR + SDMA1_REGISTER_OFFSET;

		rptr = RREG32(reg);
	}

	return (rptr & 0x3fffc) >> 2;
}

static void gmc_v7_0_mc_stop(struct amdgpu_device *adev)
{
	u32 blackout;

	gmc_v7_0_wait_for_idle((void *)adev);

	blackout = RREG32(mmMC_SHARED_BLACKOUT_CNTL);
	if (REG_GET_FIELD(blackout, MC_SHARED_BLACKOUT_CNTL, BLACKOUT_MODE) != 1) {
		/* Block CPU access */
		WREG32(mmBIF_FB_EN, 0);
		/* blackout the MC */
		blackout = REG_SET_FIELD(blackout,
					 MC_SHARED_BLACKOUT_CNTL, BLACKOUT_MODE, 0);
		WREG32(mmMC_SHARED_BLACKOUT_CNTL, blackout | 1);
	}
	/* wait for the MC to settle */
	udelay(100);
}

static void si_dma_stop(struct amdgpu_device *adev)
{
	struct amdgpu_ring *ring;
	u32 rb_cntl;
	unsigned i;

	for (i = 0; i < adev->sdma.num_instances; i++) {
		ring = &adev->sdma.instance[i].ring;
		/* dma0 */
		rb_cntl = RREG32(DMA_RB_CNTL + sdma_offsets[i]);
		rb_cntl &= ~DMA_RB_ENABLE;
		WREG32(DMA_RB_CNTL + sdma_offsets[i], rb_cntl);

		if (adev->mman.buffer_funcs_ring == ring)
			amdgpu_ttm_set_active_vram_size(adev, adev->mc.visible_vram_size);
		ring->ready = false;
	}
}

static int mgag200_device_init(struct drm_device *dev,
			       uint32_t flags)
{
	struct mga_device *mdev = dev->dev_private;
	int ret, option;

	mdev->type = flags;

	/* Hardcode the number of CRTCs to 1 */
	mdev->num_crtc = 1;

	pci_read_config_dword(dev->pdev, PCI_MGA_OPTION, &option);
	mdev->has_sdram = !(option & (1 << 14));

	/* BAR 0 is the framebuffer, BAR 1 contains registers */
	mdev->rmmio_base = pci_resource_start(mdev->dev->pdev, 1);
	mdev->rmmio_size = pci_resource_len(mdev->dev->pdev, 1);

	if (!request_mem_region(mdev->rmmio_base, mdev->rmmio_size,
				"mgadrmfb_mmio")) {
		DRM_ERROR("can't reserve mmio registers\n");
		return -ENOMEM;
	}

	mdev->rmmio = pci_iomap(dev->pdev, 1, 0);
	if (mdev->rmmio == NULL)
		return -ENOMEM;

	/* stash G200 SE model number for later use */
	if (IS_G200_SE(mdev))
		mdev->reg_1e24 = RREG32(0x1e24);

	ret = mga_vram_init(mdev);
	if (ret) {
		release_mem_region(mdev->rmmio_base, mdev->rmmio_size);
		return ret;
	}

	mdev->bpp_shifts[0] = 0;
	mdev->bpp_shifts[1] = 1;
	mdev->bpp_shifts[2] = 0;
	mdev->bpp_shifts[3] = 2;
	return 0;
}

/**
 * cik_sdma_enable - stop the async dma engines
 *
 * @adev: amdgpu_device pointer
 * @enable: enable/disable the DMA MEs.
 *
 * Halt or unhalt the async dma engines (CIK).
 */
static void cik_sdma_enable(struct amdgpu_device *adev, bool enable)
{
	u32 me_cntl;
	int i;

	if (!enable) {
		cik_sdma_gfx_stop(adev);
		cik_sdma_rlc_stop(adev);
	}

	for (i = 0; i < adev->sdma.num_instances; i++) {
		me_cntl = RREG32(mmSDMA0_F32_CNTL + sdma_offsets[i]);
		if (enable)
			me_cntl &= ~SDMA0_F32_CNTL__HALT_MASK;
		else
			me_cntl |= SDMA0_F32_CNTL__HALT_MASK;
		WREG32(mmSDMA0_F32_CNTL + sdma_offsets[i], me_cntl);
	}
}

void dce4_hdmi_audio_set_dto(struct radeon_device *rdev,
	struct radeon_crtc *crtc, unsigned int clock)
{
	unsigned int max_ratio = clock / 24000;
	u32 dto_phase;
	u32 wallclock_ratio;
	u32 value;

	if (max_ratio >= 8) {
		dto_phase = 192 * 1000;
		wallclock_ratio = 3;
	} else if (max_ratio >= 4) {
		dto_phase = 96 * 1000;
		wallclock_ratio = 2;
	} else if (max_ratio >= 2) {
		dto_phase = 48 * 1000;
		wallclock_ratio = 1;
	} else {
		dto_phase = 24 * 1000;
		wallclock_ratio = 0;
	}

	value = RREG32(DCCG_AUDIO_DTO0_CNTL) & ~DCCG_AUDIO_DTO_WALLCLOCK_RATIO_MASK;
	value |= DCCG_AUDIO_DTO_WALLCLOCK_RATIO(wallclock_ratio);
	value &= ~DCCG_AUDIO_DTO1_USE_512FBR_DTO;
	WREG32(DCCG_AUDIO_DTO0_CNTL, value);

	/* Two dtos; generally use dto0 for HDMI */
	value = 0;

	if (crtc)
		value |= DCCG_AUDIO_DTO0_SOURCE_SEL(crtc->crtc_id);

	WREG32(DCCG_AUDIO_DTO_SOURCE, value);

	/* Express [24MHz / target pixel clock] as an exact rational
	 * number (coefficient of two integer numbers.  DCCG_AUDIO_DTOx_PHASE
	 * is the numerator, DCCG_AUDIO_DTOx_MODULE is the denominator
	 */
	WREG32(DCCG_AUDIO_DTO0_PHASE, dto_phase);
	WREG32(DCCG_AUDIO_DTO0_MODULE, clock);
}

/**
 * cik_sdma_gfx_stop - stop the gfx async dma engines
 *
 * @rdev: radeon_device pointer
 *
 * Stop the gfx async dma ring buffers (CIK).
 */
static void cik_sdma_gfx_stop(struct radeon_device *rdev)
{
	u32 rb_cntl, reg_offset;
	int i;

	radeon_ttm_set_active_vram_size(rdev, rdev->mc.visible_vram_size);

	for (i = 0; i < 2; i++) {
		if (i == 0)
			reg_offset = SDMA0_REGISTER_OFFSET;
		else
			reg_offset = SDMA1_REGISTER_OFFSET;
		rb_cntl = RREG32(SDMA0_GFX_RB_CNTL + reg_offset);
		rb_cntl &= ~SDMA_RB_ENABLE;
		WREG32(SDMA0_GFX_RB_CNTL + reg_offset, rb_cntl);
		WREG32(SDMA0_GFX_IB_CNTL + reg_offset, 0);
	}
	rdev->ring[R600_RING_TYPE_DMA_INDEX].ready = false;
	rdev->ring[CAYMAN_RING_TYPE_DMA1_INDEX].ready = false;
}

/**
 * cik_sdma_gfx_stop - stop the gfx async dma engines
 *
 * @adev: amdgpu_device pointer
 *
 * Stop the gfx async dma ring buffers (CIK).
 */
static void cik_sdma_gfx_stop(struct amdgpu_device *adev)
{
	struct amdgpu_ring *sdma0 = &adev->sdma.instance[0].ring;
	struct amdgpu_ring *sdma1 = &adev->sdma.instance[1].ring;
	u32 rb_cntl;
	int i;

	if ((adev->mman.buffer_funcs_ring == sdma0) ||
	    (adev->mman.buffer_funcs_ring == sdma1))
		amdgpu_ttm_set_active_vram_size(adev, adev->mc.visible_vram_size);

	for (i = 0; i < adev->sdma.num_instances; i++) {
		rb_cntl = RREG32(mmSDMA0_GFX_RB_CNTL + sdma_offsets[i]);
		rb_cntl &= ~SDMA0_GFX_RB_CNTL__RB_ENABLE_MASK;
		WREG32(mmSDMA0_GFX_RB_CNTL + sdma_offsets[i], rb_cntl);
		WREG32(mmSDMA0_GFX_IB_CNTL + sdma_offsets[i], 0);
	}
	sdma0->ready = false;
	sdma1->ready = false;
}

/**
 * gmc_v8_0_set_fault_enable_default - update VM fault handling
 *
 * @adev: amdgpu_device pointer
 * @value: true redirects VM faults to the default page
 */
static void gmc_v7_0_set_fault_enable_default(struct amdgpu_device *adev,
					      bool value)
{
	u32 tmp;

	tmp = RREG32(mmVM_CONTEXT1_CNTL);
	tmp = REG_SET_FIELD(tmp, VM_CONTEXT1_CNTL,
			    RANGE_PROTECTION_FAULT_ENABLE_DEFAULT, value);
	tmp = REG_SET_FIELD(tmp, VM_CONTEXT1_CNTL,
			    DUMMY_PAGE_PROTECTION_FAULT_ENABLE_DEFAULT, value);
	tmp = REG_SET_FIELD(tmp, VM_CONTEXT1_CNTL,
			    PDE0_PROTECTION_FAULT_ENABLE_DEFAULT, value);
	tmp = REG_SET_FIELD(tmp, VM_CONTEXT1_CNTL,
			    VALID_PROTECTION_FAULT_ENABLE_DEFAULT, value);
	tmp = REG_SET_FIELD(tmp, VM_CONTEXT1_CNTL,
			    READ_PROTECTION_FAULT_ENABLE_DEFAULT, value);
	tmp = REG_SET_FIELD(tmp, VM_CONTEXT1_CNTL,
			    WRITE_PROTECTION_FAULT_ENABLE_DEFAULT, value);
	WREG32(mmVM_CONTEXT1_CNTL, tmp);
}

static void vi_detect_hw_virtualization(struct amdgpu_device *adev)
{
	uint32_t reg = 0;

	if (adev->asic_type == CHIP_TONGA ||
	    adev->asic_type == CHIP_FIJI) {
	       reg = RREG32(mmBIF_IOV_FUNC_IDENTIFIER);
	       /* bit0: 0 means pf and 1 means vf */
	       if (REG_GET_FIELD(reg, BIF_IOV_FUNC_IDENTIFIER, FUNC_IDENTIFIER))
		       adev->virt.caps |= AMDGPU_SRIOV_CAPS_IS_VF;
	       /* bit31: 0 means disable IOV and 1 means enable */
	       if (REG_GET_FIELD(reg, BIF_IOV_FUNC_IDENTIFIER, IOV_ENABLE))
		       adev->virt.caps |= AMDGPU_SRIOV_CAPS_ENABLE_IOV;
	}

	if (reg == 0) {
		if (is_virtual_machine()) /* passthrough mode exclus sr-iov mode */
			adev->virt.caps |= AMDGPU_PASSTHROUGH_MODE;
	}
}

int rs600_mc_init(struct radeon_device *rdev)
{
	uint32_t tmp;
	int r;

	if (r100_debugfs_rbbm_init(rdev)) {
		DRM_ERROR("Failed to register debugfs file for RBBM !\n");
	}

	rs600_gpu_init(rdev);
	rs600_gart_disable(rdev);

	/* Setup GPU memory space */
	rdev->mc.vram_location = 0xFFFFFFFFUL;
	rdev->mc.gtt_location = 0xFFFFFFFFUL;
	r = radeon_mc_setup(rdev);
	if (r) {
		return r;
	}

	/* Program GPU memory space */
	/* Enable bus master */
	tmp = RREG32(RADEON_BUS_CNTL) & ~RS600_BUS_MASTER_DIS;
	WREG32(RADEON_BUS_CNTL, tmp);
	/* FIXME: What does AGP means for such chipset ? */
	WREG32_MC(RS600_MC_AGP_LOCATION, 0x0FFFFFFF);
	/* FIXME: are this AGP reg in indirect MC range ? */
	WREG32_MC(RS600_MC_AGP_BASE, 0);
	WREG32_MC(RS600_MC_AGP_BASE_2, 0);
	rs600_mc_disable_clients(rdev);
	if (rs600_mc_wait_for_idle(rdev)) {
		printk(KERN_WARNING "Failed to wait MC idle while "
		       "programming pipes. Bad things might happen.\n");
	}
	tmp = rdev->mc.vram_location + rdev->mc.mc_vram_size - 1;
	tmp = REG_SET(RS600_MC_FB_TOP, tmp >> 16);
	tmp |= REG_SET(RS600_MC_FB_START, rdev->mc.vram_location >> 16);
	WREG32_MC(RS600_MC_FB_LOCATION, tmp);
	WREG32(RS690_HDP_FB_LOCATION, rdev->mc.vram_location >> 16);
	return 0;
}

static void uvd_v5_0_get_clockgating_state(void *handle, u32 *flags)
{
	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
	int data;

	mutex_lock(&adev->pm.mutex);

	if (RREG32_SMC(ixCURRENT_PG_STATUS) &
				CURRENT_PG_STATUS__UVD_PG_STATUS_MASK) {
		DRM_INFO("Cannot get clockgating state when UVD is powergated.\n");
		goto out;
	}

	/* AMD_CG_SUPPORT_UVD_MGCG */
	data = RREG32(mmUVD_CGC_CTRL);
	if (data & UVD_CGC_CTRL__DYN_CLOCK_MODE_MASK)
		*flags |= AMD_CG_SUPPORT_UVD_MGCG;

out:
	mutex_unlock(&adev->pm.mutex);
}

int psp_wait_for(struct psp_context *psp, uint32_t reg_index,
		 uint32_t reg_val, uint32_t mask, bool check_changed)
{
	uint32_t val;
	int i;
	struct amdgpu_device *adev = psp->adev;

	for (i = 0; i < adev->usec_timeout; i++) {
		val = RREG32(reg_index);
		if (check_changed) {
			if (val != reg_val)
				return 0;
		} else {
			if ((val & mask) == reg_val)
				return 0;
		}
		udelay(1);
	}

	return -ETIME;
}

/**
 * cik_ih_get_wptr - get the IH ring buffer wptr
 *
 * @adev: amdgpu_device pointer
 *
 * Get the IH ring buffer wptr from either the register
 * or the writeback memory buffer (CIK).  Also check for
 * ring buffer overflow and deal with it.
 * Used by cik_irq_process().
 * Returns the value of the wptr.
 */
static u32 cik_ih_get_wptr(struct amdgpu_device *adev)
{
	u32 wptr, tmp;

	wptr = le32_to_cpu(adev->wb.wb[adev->irq.ih.wptr_offs]);

	if (wptr & IH_RB_WPTR__RB_OVERFLOW_MASK) {
		wptr &= ~IH_RB_WPTR__RB_OVERFLOW_MASK;
		/* When a ring buffer overflow happen start parsing interrupt
		 * from the last not overwritten vector (wptr + 16). Hopefully
		 * this should allow us to catchup.
		 */
		dev_warn(adev->dev, "IH ring buffer overflow (0x%08X, 0x%08X, 0x%08X)\n",
			wptr, adev->irq.ih.rptr, (wptr + 16) & adev->irq.ih.ptr_mask);
		adev->irq.ih.rptr = (wptr + 16) & adev->irq.ih.ptr_mask;
		tmp = RREG32(mmIH_RB_CNTL);
		tmp |= IH_RB_CNTL__WPTR_OVERFLOW_CLEAR_MASK;
		WREG32(mmIH_RB_CNTL, tmp);
	}
	return (wptr & adev->irq.ih.ptr_mask);
}

static void vi_gpu_pci_config_reset(struct amdgpu_device *adev)
{
	u32 i;

	dev_info(adev->dev, "GPU pci config reset\n");

	/* disable BM */
	pci_clear_master(adev->pdev);
	/* reset */
	amdgpu_pci_config_reset(adev);

	udelay(100);

	/* wait for asic to come out of reset */
	for (i = 0; i < adev->usec_timeout; i++) {
		if (RREG32(mmCONFIG_MEMSIZE) != 0xffffffff)
			break;
		udelay(1);
	}

}