Commit e139e8ae authored by Dave Airlie's avatar Dave Airlie
Browse files

Merge tag 'drm/tegra/for-5.6-rc1-fixes' of git://anongit.freedesktop.org/tegra/linux into drm-next 



drm/tegra: Fixes for v5.6-rc1

These are a couple of quick fixes for regressions that were found during
the first two weeks of the merge window.

Signed-off-by: default avatarDave Airlie <airlied@redhat.com>

From: Thierry Reding <thierry.reding@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200206172753.2185390-1-thierry.reding@gmail.com
parents b45f1b3b 98ae41ad

drivers/gpu/drm/tegra/drm.c

+32 −17
Original line number Diff line number Diff line
@@ -1037,23 +1037,9 @@ void tegra_drm_free(struct tegra_drm *tegra, size_t size, void *virt, 
	free_pages((unsigned long)virt, get_order(size));

}



static int host1x_drm_probe(struct host1x_device *dev)

static bool host1x_drm_wants_iommu(struct host1x_device *dev)

{

	struct drm_driver *driver = &tegra_drm_driver;

	struct iommu_domain *domain;

	struct tegra_drm *tegra;

	struct drm_device *drm;

	int err;



	drm = drm_dev_alloc(driver, &dev->dev);

	if (IS_ERR(drm))

		return PTR_ERR(drm);



	tegra = kzalloc(sizeof(*tegra), GFP_KERNEL);

	if (!tegra) {

		err = -ENOMEM;

		goto put;

	}



	/*

	 * If the Tegra DRM clients are backed by an IOMMU, push buffers are
@@ -1082,9 +1068,38 @@ static int host1x_drm_probe(struct host1x_device *dev) 
	 * up the device tree appropriately. This is considered an problem

	 * of integration, so care must be taken for the DT to be consistent.

	 */

	domain = iommu_get_domain_for_dev(drm->dev->parent);

	domain = iommu_get_domain_for_dev(dev->dev.parent);



	/*

	 * Tegra20 and Tegra30 don't support addressing memory beyond the

	 * 32-bit boundary, so the regular GATHER opcodes will always be

	 * sufficient and whether or not the host1x is attached to an IOMMU

	 * doesn't matter.

	 */

	if (!domain && dma_get_mask(dev->dev.parent) <= DMA_BIT_MASK(32))

		return true;



	return domain != NULL;

}



static int host1x_drm_probe(struct host1x_device *dev)

{

	struct drm_driver *driver = &tegra_drm_driver;

	struct tegra_drm *tegra;

	struct drm_device *drm;

	int err;



	drm = drm_dev_alloc(driver, &dev->dev);

	if (IS_ERR(drm))

		return PTR_ERR(drm);



	tegra = kzalloc(sizeof(*tegra), GFP_KERNEL);

	if (!tegra) {

		err = -ENOMEM;

		goto put;

	}



	if (domain && iommu_present(&platform_bus_type)) {

	if (host1x_drm_wants_iommu(dev) && iommu_present(&platform_bus_type)) {

		tegra->domain = iommu_domain_alloc(&platform_bus_type);

		if (!tegra->domain) {

			err = -ENOMEM;

drivers/gpu/drm/tegra/gem.c

+9 −1
Original line number Diff line number Diff line
@@ -60,8 +60,16 @@ static struct sg_table *tegra_bo_pin(struct device *dev, struct host1x_bo *bo, 
	/*

	 * If we've manually mapped the buffer object through the IOMMU, make

	 * sure to return the IOVA address of our mapping.

	 *

	 * Similarly, for buffers that have been allocated by the DMA API the

	 * physical address can be used for devices that are not attached to

	 * an IOMMU. For these devices, callers must pass a valid pointer via

	 * the @phys argument.

	 *

	 * Imported buffers were also already mapped at import time, so the

	 * existing mapping can be reused.

	 */

	if (phys && obj->mm) {

	if (phys) {

		*phys = obj->iova;

		return NULL;

	}

drivers/gpu/drm/tegra/plane.c

+25 −19
Original line number Diff line number Diff line
@@ -3,6 +3,8 @@ 
 * Copyright (C) 2017 NVIDIA CORPORATION.  All rights reserved.

 */



#include <linux/iommu.h>



#include <drm/drm_atomic.h>

#include <drm/drm_atomic_helper.h>

#include <drm/drm_fourcc.h>
@@ -107,21 +109,27 @@ const struct drm_plane_funcs tegra_plane_funcs = { 


static int tegra_dc_pin(struct tegra_dc *dc, struct tegra_plane_state *state)

{

	struct iommu_domain *domain = iommu_get_domain_for_dev(dc->dev);

	unsigned int i;

	int err;



	for (i = 0; i < state->base.fb->format->num_planes; i++) {

		struct tegra_bo *bo = tegra_fb_get_plane(state->base.fb, i);



		if (!dc->client.group) {

		dma_addr_t phys_addr, *phys;

		struct sg_table *sgt;



			sgt = host1x_bo_pin(dc->dev, &bo->base, NULL);

		if (!domain || dc->client.group)

			phys = &phys_addr;

		else

			phys = NULL;



		sgt = host1x_bo_pin(dc->dev, &bo->base, phys);

		if (IS_ERR(sgt)) {

			err = PTR_ERR(sgt);

			goto unpin;

		}



		if (sgt) {

			err = dma_map_sg(dc->dev, sgt->sgl, sgt->nents,

					 DMA_TO_DEVICE);

			if (err == 0) {
@@ -143,7 +151,7 @@ static int tegra_dc_pin(struct tegra_dc *dc, struct tegra_plane_state *state) 
			state->iova[i] = sg_dma_address(sgt->sgl);

			state->sgt[i] = sgt;

		} else {

			state->iova[i] = bo->iova;

			state->iova[i] = phys_addr;

		}

	}
@@ -156,9 +164,11 @@ unpin: 
		struct tegra_bo *bo = tegra_fb_get_plane(state->base.fb, i);

		struct sg_table *sgt = state->sgt[i];



		dma_unmap_sg(dc->dev, sgt->sgl, sgt->nents, DMA_TO_DEVICE);

		host1x_bo_unpin(dc->dev, &bo->base, sgt);

		if (sgt)

			dma_unmap_sg(dc->dev, sgt->sgl, sgt->nents,

				     DMA_TO_DEVICE);



		host1x_bo_unpin(dc->dev, &bo->base, sgt);

		state->iova[i] = DMA_MAPPING_ERROR;

		state->sgt[i] = NULL;

	}
@@ -172,17 +182,13 @@ static void tegra_dc_unpin(struct tegra_dc *dc, struct tegra_plane_state *state) 


	for (i = 0; i < state->base.fb->format->num_planes; i++) {

		struct tegra_bo *bo = tegra_fb_get_plane(state->base.fb, i);



		if (!dc->client.group) {

		struct sg_table *sgt = state->sgt[i];



			if (sgt) {

		if (sgt)

			dma_unmap_sg(dc->dev, sgt->sgl, sgt->nents,

				     DMA_TO_DEVICE);

				host1x_bo_unpin(dc->dev, &bo->base, sgt);

			}

		}



		host1x_bo_unpin(dc->dev, &bo->base, sgt);

		state->iova[i] = DMA_MAPPING_ERROR;

		state->sgt[i] = NULL;

	}

drivers/gpu/drm/tegra/sor.c

+27 −22
Original line number Diff line number Diff line
@@ -3915,6 +3915,17 @@ static int tegra_sor_probe(struct platform_device *pdev) 
	platform_set_drvdata(pdev, sor);

	pm_runtime_enable(&pdev->dev);



	INIT_LIST_HEAD(&sor->client.list);

	sor->client.ops = &sor_client_ops;

	sor->client.dev = &pdev->dev;



	err = host1x_client_register(&sor->client);

	if (err < 0) {

		dev_err(&pdev->dev, "failed to register host1x client: %d\n",

			err);

		goto rpm_disable;

	}



	/*

	 * On Tegra210 and earlier, provide our own implementation for the

	 * pad output clock.
@@ -3922,16 +3933,17 @@ static int tegra_sor_probe(struct platform_device *pdev) 
	if (!sor->clk_pad) {

		char *name;



		name = devm_kasprintf(sor->dev, GFP_KERNEL, "sor%u_pad_clkout",

				      sor->index);

		if (!name) {

			err = -ENOMEM;

			goto unregister;

		}



		err = host1x_client_resume(&sor->client);

		if (err < 0) {

			dev_err(sor->dev, "failed to resume: %d\n", err);

			goto remove;

		}



		name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "sor%u_pad_clkout", sor->index);

		if (!name) {

			err = -ENOMEM;

			goto remove;

			goto unregister;

		}



		sor->clk_pad = tegra_clk_sor_pad_register(sor, name);
@@ -3940,24 +3952,17 @@ static int tegra_sor_probe(struct platform_device *pdev) 


	if (IS_ERR(sor->clk_pad)) {

		err = PTR_ERR(sor->clk_pad);

		dev_err(&pdev->dev, "failed to register SOR pad clock: %d\n",

			err);

		goto remove;

	}



	INIT_LIST_HEAD(&sor->client.list);

	sor->client.ops = &sor_client_ops;

	sor->client.dev = &pdev->dev;



	err = host1x_client_register(&sor->client);

	if (err < 0) {

		dev_err(&pdev->dev, "failed to register host1x client: %d\n",

		dev_err(sor->dev, "failed to register SOR pad clock: %d\n",

			err);

		goto remove;

		goto unregister;

	}



	return 0;



unregister:

	host1x_client_unregister(&sor->client);

rpm_disable:

	pm_runtime_disable(&pdev->dev);

remove:

	if (sor->ops && sor->ops->remove)

		sor->ops->remove(sor);
@@ -3971,8 +3976,6 @@ static int tegra_sor_remove(struct platform_device *pdev) 
	struct tegra_sor *sor = platform_get_drvdata(pdev);

	int err;



	pm_runtime_disable(&pdev->dev);



	err = host1x_client_unregister(&sor->client);

	if (err < 0) {

		dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
@@ -3980,6 +3983,8 @@ static int tegra_sor_remove(struct platform_device *pdev) 
		return err;

	}



	pm_runtime_disable(&pdev->dev);



	if (sor->ops && sor->ops->remove) {

		err = sor->ops->remove(sor);

		if (err < 0)

drivers/gpu/host1x/job.c

+30 −4
Original line number Diff line number Diff line
@@ -8,6 +8,7 @@ 
#include <linux/dma-mapping.h>

#include <linux/err.h>

#include <linux/host1x.h>

#include <linux/iommu.h>

#include <linux/kref.h>

#include <linux/module.h>

#include <linux/scatterlist.h>
@@ -101,9 +102,11 @@ static unsigned int pin_job(struct host1x *host, struct host1x_job *job) 
{

	struct host1x_client *client = job->client;

	struct device *dev = client->dev;

	struct iommu_domain *domain;

	unsigned int i;

	int err;



	domain = iommu_get_domain_for_dev(dev);

	job->num_unpins = 0;



	for (i = 0; i < job->num_relocs; i++) {
@@ -117,7 +120,19 @@ static unsigned int pin_job(struct host1x *host, struct host1x_job *job) 
			goto unpin;

		}



		if (client->group)

		/*

		 * If the client device is not attached to an IOMMU, the

		 * physical address of the buffer object can be used.

		 *

		 * Similarly, when an IOMMU domain is shared between all

		 * host1x clients, the IOVA is already available, so no

		 * need to map the buffer object again.

		 *

		 * XXX Note that this isn't always safe to do because it

		 * relies on an assumption that no cache maintenance is

		 * needed on the buffer objects.

		 */

		if (!domain || client->group)

			phys = &phys_addr;

		else

			phys = NULL;
@@ -176,6 +191,7 @@ static unsigned int pin_job(struct host1x *host, struct host1x_job *job) 
		dma_addr_t phys_addr;

		unsigned long shift;

		struct iova *alloc;

		dma_addr_t *phys;

		unsigned int j;



		g->bo = host1x_bo_get(g->bo);
@@ -184,7 +200,17 @@ static unsigned int pin_job(struct host1x *host, struct host1x_job *job) 
			goto unpin;

		}



		sgt = host1x_bo_pin(host->dev, g->bo, NULL);

		/**

		 * If the host1x is not attached to an IOMMU, there is no need

		 * to map the buffer object for the host1x, since the physical

		 * address can simply be used.

		 */

		if (!iommu_get_domain_for_dev(host->dev))

			phys = &phys_addr;

		else

			phys = NULL;



		sgt = host1x_bo_pin(host->dev, g->bo, phys);

		if (IS_ERR(sgt)) {

			err = PTR_ERR(sgt);

			goto unpin;
@@ -214,7 +240,7 @@ static unsigned int pin_job(struct host1x *host, struct host1x_job *job) 


			job->unpins[job->num_unpins].size = gather_size;

			phys_addr = iova_dma_addr(&host->iova, alloc);

		} else {

		} else if (sgt) {

			err = dma_map_sg(host->dev, sgt->sgl, sgt->nents,

					 DMA_TO_DEVICE);

			if (!err) {
@@ -222,6 +248,7 @@ static unsigned int pin_job(struct host1x *host, struct host1x_job *job) 
				goto unpin;

			}



			job->unpins[job->num_unpins].dir = DMA_TO_DEVICE;

			job->unpins[job->num_unpins].dev = host->dev;

			phys_addr = sg_dma_address(sgt->sgl);

		}
@@ -229,7 +256,6 @@ static unsigned int pin_job(struct host1x *host, struct host1x_job *job) 
		job->addr_phys[job->num_unpins] = phys_addr;

		job->gather_addr_phys[i] = phys_addr;



		job->unpins[job->num_unpins].dir = DMA_TO_DEVICE;

		job->unpins[job->num_unpins].bo = g->bo;

		job->unpins[job->num_unpins].sgt = sgt;

		job->num_unpins++;

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