[PATCH 08/10] drm/gma500: Split GTT init/resume/fini into GTT and GEM functions

6 Mar 2022

The GTT init, fini and resume functions contain both, GTT and GEM,
code. Split each into a separate GTT and a GEM function. The GEM
code is responsible for mmap_mutex and the stolen memory area. The
rest of the functionality is left in GTT functions.
Signed-off-by: Thomas Zimmermann tzimmermann@suse.de
---
 drivers/gpu/drm/gma500/gtt.c     | 118 ++++++++++++++++++++-----------
 drivers/gpu/drm/gma500/gtt.h     |   3 +
 drivers/gpu/drm/gma500/psb_drv.c |   4 ++
 3 files changed, 83 insertions(+), 42 deletions(-)

diff --git a/drivers/gpu/drm/gma500/gtt.c b/drivers/gpu/drm/gma500/gtt.c
index 99c644a5c5cb..0e99774c7e59 100644
--- a/drivers/gpu/drm/gma500/gtt.c
+++ b/drivers/gpu/drm/gma500/gtt.c
@@ -125,19 +125,26 @@ void psb_gtt_remove_pages(struct drm_psb_private *pdev, const struct resource *r
    mutex_unlock(&pdev->gtt_mutex);
 }
+void psb_gem_mm_fini(struct drm_device *dev)
+{
+	struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
+
+	iounmap(dev_priv->vram_addr);
+
+	mutex_destroy(&dev_priv->mmap_mutex);
+}
+
 void psb_gtt_fini(struct drm_device *dev)
 {
    struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
    struct pci_dev *pdev = to_pci_dev(dev->dev);
-	iounmap(dev_priv->vram_addr);
    iounmap(dev_priv->gtt_map);
pci_write_config_word(pdev, PSB_GMCH_CTRL, dev_priv->gmch_ctrl);
    PSB_WVDC32(dev_priv->pge_ctl, PSB_PGETBL_CTL);
    (void)PSB_RVDC32(PSB_PGETBL_CTL);
-	mutex_destroy(&dev_priv->mmap_mutex);
    mutex_destroy(&dev_priv->gtt_mutex);
 }
@@ -211,12 +218,10 @@ int psb_gtt_init(struct drm_device *dev)
    struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
    struct pci_dev *pdev = to_pci_dev(dev->dev);
    unsigned gtt_pages;
-	unsigned long stolen_size, vram_stolen_size;
    struct psb_gtt *pg;
    int ret = 0;
mutex_init(&dev_priv->gtt_mutex);
-	mutex_init(&dev_priv->mmap_mutex);
pg = &dev_priv->gtt;
@@ -274,22 +279,8 @@ int psb_gtt_init(struct drm_device *dev)
    	dev_priv->gtt_mem = &fudge;
    }
-	pci_read_config_dword(pdev, PSB_BSM, &dev_priv->stolen_base);
-	vram_stolen_size = pg->gtt_phys_start - dev_priv->stolen_base
-								- PAGE_SIZE;
-
-	stolen_size = vram_stolen_size;
-
-	dev_dbg(dev->dev, "Stolen memory base 0x%x, size %luK\n",
-			dev_priv->stolen_base, vram_stolen_size / 1024);
-
    pg->gtt_pages = gtt_pages;
-	pg->stolen_size = stolen_size;
-	dev_priv->vram_stolen_size = vram_stolen_size;
-	/*
-	 *	Map the GTT and the stolen memory area
-	 */
    dev_priv->gtt_map = ioremap(pg->gtt_phys_start, gtt_pages << PAGE_SHIFT);
    if (!dev_priv->gtt_map) {
    	dev_err(dev->dev, "Failure to map gtt.\n");
@@ -297,26 +288,54 @@ int psb_gtt_init(struct drm_device *dev)
    	goto err_gtt_disable;
    }
+	psb_gtt_clear(dev_priv);
+
+	return 0;
+
+err_gtt_disable:
+	pci_write_config_word(pdev, PSB_GMCH_CTRL, dev_priv->gmch_ctrl);
+	PSB_WVDC32(dev_priv->pge_ctl, PSB_PGETBL_CTL);
+	(void)PSB_RVDC32(PSB_PGETBL_CTL);
+	mutex_destroy(&dev_priv->gtt_mutex);
+	return ret;
+}
+
+int psb_gem_mm_init(struct drm_device *dev)
+{
+	struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
+	struct pci_dev *pdev = to_pci_dev(dev->dev);
+	unsigned long stolen_size, vram_stolen_size;
+	struct psb_gtt *pg;
+	int ret;
+
+	mutex_init(&dev_priv->mmap_mutex);
+
+	pg = &dev_priv->gtt;
+
+	pci_read_config_dword(pdev, PSB_BSM, &dev_priv->stolen_base);
+	vram_stolen_size = pg->gtt_phys_start - dev_priv->stolen_base - PAGE_SIZE;
+
+	stolen_size = vram_stolen_size;
+
+	dev_dbg(dev->dev, "Stolen memory base 0x%x, size %luK\n",
+		dev_priv->stolen_base, vram_stolen_size / 1024);
+
+	pg->stolen_size = stolen_size;
+	dev_priv->vram_stolen_size = vram_stolen_size;
+
    dev_priv->vram_addr = ioremap_wc(dev_priv->stolen_base, stolen_size);
    if (!dev_priv->vram_addr) {
    	dev_err(dev->dev, "Failure to map stolen base.\n");
    	ret = -ENOMEM;
-		goto err_iounmap;
+		goto err_mutex_destroy;
    }
-	psb_gtt_clear(dev_priv);
    psb_gtt_populate_stolen(dev_priv);
return 0;
-err_iounmap:
-	iounmap(dev_priv->gtt_map);
-err_gtt_disable:
-	pci_write_config_word(pdev, PSB_GMCH_CTRL, dev_priv->gmch_ctrl);
-	PSB_WVDC32(dev_priv->pge_ctl, PSB_PGETBL_CTL);
-	(void)PSB_RVDC32(PSB_PGETBL_CTL);
+err_mutex_destroy:
    mutex_destroy(&dev_priv->mmap_mutex);
-	mutex_destroy(&dev_priv->gtt_mutex);
    return ret;
 }
@@ -325,9 +344,8 @@ static int psb_gtt_resume(struct drm_device *dev)
    struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
    struct pci_dev *pdev = to_pci_dev(dev->dev);
    unsigned int gtt_pages;
-	unsigned long stolen_size, vram_stolen_size;
    struct psb_gtt *pg;
-	int ret = 0;
+	int ret;
pg = &dev_priv->gtt;
@@ -387,27 +405,15 @@ static int psb_gtt_resume(struct drm_device *dev)
    	dev_priv->gtt_mem = &fudge;
    }
-	pci_read_config_dword(pdev, PSB_BSM, &dev_priv->stolen_base);
-	vram_stolen_size = pg->gtt_phys_start - dev_priv->stolen_base - PAGE_SIZE;
-	stolen_size = vram_stolen_size;
-
-	dev_dbg(dev->dev, "Stolen memory base 0x%x, size %luK\n",
-			dev_priv->stolen_base, vram_stolen_size / 1024);
-
-	if ((gtt_pages != pg->gtt_pages) && (stolen_size != pg->stolen_size)) {
+	if (gtt_pages != pg->gtt_pages) {
    	dev_err(dev->dev, "GTT resume error.\n");
    	ret = -EINVAL;
    	goto err_gtt_disable;
    }
pg->gtt_pages = gtt_pages;
-	pg->stolen_size = stolen_size;
-	dev_priv->vram_stolen_size = vram_stolen_size;
psb_gtt_clear(dev_priv);
-	psb_gtt_populate_stolen(dev_priv);
-
-	return 0;
err_gtt_disable:
    pci_write_config_word(pdev, PSB_GMCH_CTRL, dev_priv->gmch_ctrl);
@@ -416,11 +422,39 @@ static int psb_gtt_resume(struct drm_device *dev)
    return ret;
 }
+static int psb_gem_mm_resume(struct drm_device *dev)
+{
+	struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
+	struct pci_dev *pdev = to_pci_dev(dev->dev);
+	unsigned long stolen_size, vram_stolen_size;
+	struct psb_gtt *pg;
+
+	pg = &dev_priv->gtt;
+
+	pci_read_config_dword(pdev, PSB_BSM, &dev_priv->stolen_base);
+	vram_stolen_size = pg->gtt_phys_start - dev_priv->stolen_base - PAGE_SIZE;
+
+	stolen_size = vram_stolen_size;
+
+	dev_dbg(dev->dev, "Stolen memory base 0x%x, size %luK\n", dev_priv->stolen_base,
+		vram_stolen_size / 1024);
+
+	if (stolen_size != pg->stolen_size) {
+		dev_err(dev->dev, "GTT resume error.\n");
+		return -EINVAL;
+	}
+
+	psb_gtt_populate_stolen(dev_priv);
+
+	return 0;
+}
+
 int psb_gtt_restore(struct drm_device *dev)
 {
    struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
psb_gtt_resume(dev);
+	psb_gem_mm_resume(dev);
psb_gtt_populate_resources(dev_priv);
diff --git a/drivers/gpu/drm/gma500/gtt.h b/drivers/gpu/drm/gma500/gtt.h
index 5839d5d06adc..45e1926dfce1 100644
--- a/drivers/gpu/drm/gma500/gtt.h
+++ b/drivers/gpu/drm/gma500/gtt.h
@@ -37,4 +37,7 @@ void psb_gtt_insert_pages(struct drm_psb_private *pdev, const struct resource *r
    		  struct page **pages);
 void psb_gtt_remove_pages(struct drm_psb_private *pdev, const struct resource *res);
+int psb_gem_mm_init(struct drm_device *dev);
+void psb_gem_mm_fini(struct drm_device *dev);
+
 #endif
diff --git a/drivers/gpu/drm/gma500/psb_drv.c b/drivers/gpu/drm/gma500/psb_drv.c
index 41be6e1ac7f9..6547967b51e1 100644
--- a/drivers/gpu/drm/gma500/psb_drv.c
+++ b/drivers/gpu/drm/gma500/psb_drv.c
@@ -192,6 +192,7 @@ static void psb_driver_unload(struct drm_device *dev)
    	psb_mmu_driver_takedown(dev_priv->mmu);
    	dev_priv->mmu = NULL;
    }
+	psb_gem_mm_fini(dev);
    psb_gtt_fini(dev);
    if (dev_priv->scratch_page) {
    	set_pages_wb(dev_priv->scratch_page, 1);
@@ -325,6 +326,9 @@ static int psb_driver_load(struct drm_device *dev, unsigned long flags)
    set_pages_uc(dev_priv->scratch_page, 1);
ret = psb_gtt_init(dev);
+	if (ret)
+		goto out_err;
+	ret = psb_gem_mm_init(dev);
    if (ret)
    	goto out_err;
-- 
2.35.1


    

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[PATCH 08/10] drm/gma500: Split GTT init/resume/fini into GTT and GEM functions