Merge branch 'etnaviv/next' of https://git.pengutronix.de/git/lst/linux into drm-next

Most importantly per-process address spaces on GPUs that are capable of
providing proper isolation has finished baking. This is the base for
our softpin implementation, which allows us to support the texture
descriptor buffers used by GC7000 series GPUs without a major UAPI
extension/rework.

Shortlog of notable changes:
- code cleanup from Fabio
- fix performance counters on GC880 and GC2000 GPUs from Christian
- drmP.h header removal from Sam
- per process address space support on MMUv2 GPUs from me
- softpin support from me

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Lucas Stach <l.stach@pengutronix.de>
Link: https://patchwork.freedesktop.org/patch/msgid/1565946875.2641.73.camel@pengutronix.de

1 files changed, 59 insertions, 9 deletions

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_drv.c b/drivers/gpu/drm/etnaviv/etnaviv_drv.c
index 08e033c1758d..1f9c01be40d7 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_drv.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_drv.c
@@ -4,8 +4,17 @@
  */
 
 #include <linux/component.h>
+#include <linux/dma-mapping.h>
+#include <linux/module.h>
 #include <linux/of_platform.h>
+#include <linux/uaccess.h>
+
+#include <drm/drm_debugfs.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_file.h>
+#include <drm/drm_ioctl.h>
 #include <drm/drm_of.h>
+#include <drm/drm_prime.h>
 
 #include "etnaviv_cmdbuf.h"
 #include "etnaviv_drv.h"
@@ -41,12 +50,19 @@ static int etnaviv_open(struct drm_device *dev, struct drm_file *file)
 {
 	struct etnaviv_drm_private *priv = dev->dev_private;
 	struct etnaviv_file_private *ctx;
-	int i;
+	int ret, i;
 
 	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
 	if (!ctx)
 		return -ENOMEM;
 
+	ctx->mmu = etnaviv_iommu_context_init(priv->mmu_global,
+					      priv->cmdbuf_suballoc);
+	if (!ctx->mmu) {
+		ret = -ENOMEM;
+		goto out_free;
+	}
+
 	for (i = 0; i < ETNA_MAX_PIPES; i++) {
 		struct etnaviv_gpu *gpu = priv->gpu[i];
 		struct drm_sched_rq *rq;
@@ -61,6 +77,10 @@ static int etnaviv_open(struct drm_device *dev, struct drm_file *file)
 	file->driver_priv = ctx;
 
 	return 0;
+
+out_free:
+	kfree(ctx);
+	return ret;
 }
 
 static void etnaviv_postclose(struct drm_device *dev, struct drm_file *file)
@@ -76,6 +96,8 @@ static void etnaviv_postclose(struct drm_device *dev, struct drm_file *file)
 			drm_sched_entity_destroy(&ctx->sched_entity[i]);
 	}
 
+	etnaviv_iommu_context_put(ctx->mmu);
+
 	kfree(ctx);
 }
 
@@ -107,12 +129,29 @@ static int etnaviv_mm_show(struct drm_device *dev, struct seq_file *m)
 static int etnaviv_mmu_show(struct etnaviv_gpu *gpu, struct seq_file *m)
 {
 	struct drm_printer p = drm_seq_file_printer(m);
+	struct etnaviv_iommu_context *mmu_context;
 
 	seq_printf(m, "Active Objects (%s):\n", dev_name(gpu->dev));
 
-	mutex_lock(&gpu->mmu->lock);
-	drm_mm_print(&gpu->mmu->mm, &p);
-	mutex_unlock(&gpu->mmu->lock);
+	/*
+	 * Lock the GPU to avoid a MMU context switch just now and elevate
+	 * the refcount of the current context to avoid it disappearing from
+	 * under our feet.
+	 */
+	mutex_lock(&gpu->lock);
+	mmu_context = gpu->mmu_context;
+	if (mmu_context)
+		etnaviv_iommu_context_get(mmu_context);
+	mutex_unlock(&gpu->lock);
+
+	if (!mmu_context)
+		return 0;
+
+	mutex_lock(&mmu_context->lock);
+	drm_mm_print(&mmu_context->mm, &p);
+	mutex_unlock(&mmu_context->lock);
+
+	etnaviv_iommu_context_put(mmu_context);
 
 	return 0;
 }
@@ -486,7 +525,7 @@ static struct drm_driver etnaviv_drm_driver = {
 	.desc               = "etnaviv DRM",
 	.date               = "20151214",
 	.major              = 1,
-	.minor              = 2,
+	.minor              = 3,
 };
 
 /*
@@ -517,23 +556,32 @@ static int etnaviv_bind(struct device *dev)
 	INIT_LIST_HEAD(&priv->gem_list);
 	priv->num_gpus = 0;
 
+	priv->cmdbuf_suballoc = etnaviv_cmdbuf_suballoc_new(drm->dev);
+	if (IS_ERR(priv->cmdbuf_suballoc)) {
+		dev_err(drm->dev, "Failed to create cmdbuf suballocator\n");
+		ret = PTR_ERR(priv->cmdbuf_suballoc);
+		goto out_free_priv;
+	}
+
 	dev_set_drvdata(dev, drm);
 
 	ret = component_bind_all(dev, drm);
 	if (ret < 0)
-		goto out_bind;
+		goto out_destroy_suballoc;
 
 	load_gpu(drm);
 
 	ret = drm_dev_register(drm, 0);
 	if (ret)
-		goto out_register;
+		goto out_unbind;
 
 	return 0;
 
-out_register:
+out_unbind:
 	component_unbind_all(dev, drm);
-out_bind:
+out_destroy_suballoc:
+	etnaviv_cmdbuf_suballoc_destroy(priv->cmdbuf_suballoc);
+out_free_priv:
 	kfree(priv);
 out_put:
 	drm_dev_put(drm);
@@ -552,6 +600,8 @@ static void etnaviv_unbind(struct device *dev)
 
 	dev->dma_parms = NULL;
 
+	etnaviv_cmdbuf_suballoc_destroy(priv->cmdbuf_suballoc);
+
 	drm->dev_private = NULL;
 	kfree(priv);