drm/tegra: gem: Rename paddr -> iova

The address can refer to either physical memory or IO virtual memory.
If referring to IO virtual memory, there will always be an associated
physical memory address. Rename this variable to "iova" to clarify in
all cases that this is the IO virtual memory, which in the absence of
an IOMMU is identical to the physical address.

Signed-off-by: Thierry Reding <treding@nvidia.com>

diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c
index 3ac535bd99ca79d92d95a2d66d0c3333a6292840..54966f5381415994cb4d56ea775028dd3a37ccfb 100644 (file)
--- a/drivers/gpu/drm/tegra/dc.c
+++ b/drivers/gpu/drm/tegra/dc.c
@@ -717,7 +717,7 @@ static void tegra_plane_atomic_update(struct drm_plane *plane,
        for (i = 0; i < fb->format->num_planes; i++) {
                struct tegra_bo *bo = tegra_fb_get_plane(fb, i);
 
-               window.base[i] = bo->paddr + fb->offsets[i];
+               window.base[i] = bo->iova + fb->offsets[i];
 
                /*
                 * Tegra uses a shared stride for UV planes. Framebuffers are
@@ -869,11 +869,11 @@ static void tegra_cursor_atomic_update(struct drm_plane *plane,
                return;
        }
 
-       value |= (bo->paddr >> 10) & 0x3fffff;
+       value |= (bo->iova >> 10) & 0x3fffff;
        tegra_dc_writel(dc, value, DC_DISP_CURSOR_START_ADDR);
 
 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
-       value = (bo->paddr >> 32) & 0x3;
+       value = (bo->iova >> 32) & 0x3;
        tegra_dc_writel(dc, value, DC_DISP_CURSOR_START_ADDR_HI);
 #endif
 

diff --git a/drivers/gpu/drm/tegra/fb.c b/drivers/gpu/drm/tegra/fb.c
index e34325c83d28e22d69040062cf849cbff345842c..7cea89f29a5c8bacc29ed84f0a6dec04f1247a6e 100644 (file)
--- a/drivers/gpu/drm/tegra/fb.c
+++ b/drivers/gpu/drm/tegra/fb.c
@@ -269,10 +269,10 @@ static int tegra_fbdev_probe(struct drm_fb_helper *helper,
                }
        }
 
-       drm->mode_config.fb_base = (resource_size_t)bo->paddr;
+       drm->mode_config.fb_base = (resource_size_t)bo->iova;
        info->screen_base = (void __iomem *)bo->vaddr + offset;
        info->screen_size = size;
-       info->fix.smem_start = (unsigned long)(bo->paddr + offset);
+       info->fix.smem_start = (unsigned long)(bo->iova + offset);
        info->fix.smem_len = size;
 
        return 0;

diff --git a/drivers/gpu/drm/tegra/gem.c b/drivers/gpu/drm/tegra/gem.c
index fb7667c8dd4c166f6ab83219ab22797c0f402f6d..7412e23500d153024e0bf0af8613b759121e8b43 100644 (file)
--- a/drivers/gpu/drm/tegra/gem.c
+++ b/drivers/gpu/drm/tegra/gem.c
@@ -33,7 +33,7 @@ static dma_addr_t tegra_bo_pin(struct host1x_bo *bo, struct sg_table **sgt)
 
        *sgt = obj->sgt;
 
-       return obj->paddr;
+       return obj->iova;
 }
 
 static void tegra_bo_unpin(struct host1x_bo *bo, struct sg_table *sgt)
@@ -133,9 +133,9 @@ static int tegra_bo_iommu_map(struct tegra_drm *tegra, struct tegra_bo *bo)
                goto unlock;
        }
 
-       bo->paddr = bo->mm->start;
+       bo->iova = bo->mm->start;
 
-       bo->size = iommu_map_sg(tegra->domain, bo->paddr, bo->sgt->sgl,
+       bo->size = iommu_map_sg(tegra->domain, bo->iova, bo->sgt->sgl,
                                bo->sgt->nents, prot);
        if (!bo->size) {
                dev_err(tegra->drm->dev, "failed to map buffer\n");
@@ -161,7 +161,7 @@ static int tegra_bo_iommu_unmap(struct tegra_drm *tegra, struct tegra_bo *bo)
                return 0;
 
        mutex_lock(&tegra->mm_lock);
-       iommu_unmap(tegra->domain, bo->paddr, bo->size);
+       iommu_unmap(tegra->domain, bo->iova, bo->size);
        drm_mm_remove_node(bo->mm);
        mutex_unlock(&tegra->mm_lock);
 
@@ -209,7 +209,7 @@ static void tegra_bo_free(struct drm_device *drm, struct tegra_bo *bo)
                sg_free_table(bo->sgt);
                kfree(bo->sgt);
        } else if (bo->vaddr) {
-               dma_free_wc(drm->dev, bo->gem.size, bo->vaddr, bo->paddr);
+               dma_free_wc(drm->dev, bo->gem.size, bo->vaddr, bo->iova);
        }
 }
 
@@ -264,7 +264,7 @@ static int tegra_bo_alloc(struct drm_device *drm, struct tegra_bo *bo)
        } else {
                size_t size = bo->gem.size;
 
-               bo->vaddr = dma_alloc_wc(drm->dev, size, &bo->paddr,
+               bo->vaddr = dma_alloc_wc(drm->dev, size, &bo->iova,
                                         GFP_KERNEL | __GFP_NOWARN);
                if (!bo->vaddr) {
                        dev_err(drm->dev,
@@ -365,7 +365,7 @@ static struct tegra_bo *tegra_bo_import(struct drm_device *drm,
                        goto detach;
                }
 
-               bo->paddr = sg_dma_address(bo->sgt->sgl);
+               bo->iova = sg_dma_address(bo->sgt->sgl);
        }
 
        bo->gem.import_attach = attach;
@@ -461,7 +461,7 @@ int __tegra_gem_mmap(struct drm_gem_object *gem, struct vm_area_struct *vma)
                vma->vm_flags &= ~VM_PFNMAP;
                vma->vm_pgoff = 0;
 
-               err = dma_mmap_wc(gem->dev->dev, vma, bo->vaddr, bo->paddr,
+               err = dma_mmap_wc(gem->dev->dev, vma, bo->vaddr, bo->iova,
                                  gem->size);
                if (err < 0) {
                        drm_gem_vm_close(vma);
@@ -523,7 +523,7 @@ tegra_gem_prime_map_dma_buf(struct dma_buf_attachment *attach,
                if (sg_alloc_table(sgt, 1, GFP_KERNEL))
                        goto free;
 
-               sg_dma_address(sgt->sgl) = bo->paddr;
+               sg_dma_address(sgt->sgl) = bo->iova;
                sg_dma_len(sgt->sgl) = gem->size;
        }
 

diff --git a/drivers/gpu/drm/tegra/gem.h b/drivers/gpu/drm/tegra/gem.h
index 83ffb1e14ca38a20dbb6071c38090180d51d0d6c..fafb5724499be51fdb2099801a06807fda0816d1 100644 (file)
--- a/drivers/gpu/drm/tegra/gem.h
+++ b/drivers/gpu/drm/tegra/gem.h
@@ -31,7 +31,7 @@ struct tegra_bo {
        struct host1x_bo base;
        unsigned long flags;
        struct sg_table *sgt;
-       dma_addr_t paddr;
+       dma_addr_t iova;
        void *vaddr;
 
        struct drm_mm_node *mm;

diff --git a/drivers/gpu/drm/tegra/hub.c b/drivers/gpu/drm/tegra/hub.c
index 839b49c40e51448c3d15660c456955fbdeebeaf8..104115e42190146ecd5228c1dfdcddc65fc83f2e 100644 (file)
--- a/drivers/gpu/drm/tegra/hub.c
+++ b/drivers/gpu/drm/tegra/hub.c
@@ -457,7 +457,7 @@ static void tegra_shared_plane_atomic_update(struct drm_plane *plane,
        tegra_plane_writel(p, 0, DC_WINBUF_CDE_CONTROL);
 
        bo = tegra_fb_get_plane(fb, 0);
-       base = bo->paddr;
+       base = bo->iova;
 
        tegra_plane_writel(p, state->format, DC_WIN_COLOR_DEPTH);
        tegra_plane_writel(p, 0, DC_WIN_PRECOMP_WGRP_PARAMS);