[Nouveau] [PATCH 1/3] drm: Add separate state structure for legacy, non-KMS drivers

Thomas Zimmermann
Tue, 25 Feb 2020 15:59:00 -0000

Non-KMS drivers store state in struct drm_driver. This bloats the
structure for KMS drivers and prevents it from being declared with
'static const' qualifiers. Moving the non-KMS state into a separate
data structure resolves this.

Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de>
---
 drivers/gpu/drm/drm_drv.c             | 4 ++++
 drivers/gpu/drm/i810/i810_drv.c       | 4 ++++
 drivers/gpu/drm/mga/mga_drv.c         | 4 ++++
 drivers/gpu/drm/nouveau/nouveau_drm.c | 8 ++++++++
 drivers/gpu/drm/r128/r128_drv.c       | 4 ++++
 drivers/gpu/drm/savage/savage_drv.c   | 4 ++++
 drivers/gpu/drm/sis/sis_drv.c         | 4 ++++
 drivers/gpu/drm/tdfx/tdfx_drv.c       | 4 ++++
 drivers/gpu/drm/via/via_drv.c         | 4 ++++
 include/drm/drm_drv.h                 | 3 +++
 include/drm/drm_legacy.h              | 6 ++++++
 11 files changed, 49 insertions(+)

diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index 7b1a628d1f6e..4ba0df097602 100644
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -625,6 +625,10 @@ int drm_dev_init(struct drm_device *dev,
 	if (WARN_ON(!parent))
 		return -EINVAL;

+	if (drm_core_check_feature(dev, DRIVER_LEGACY) &&
+	    WARN_ON(!driver->legacy))
+		return -EINVAL;
+
 	kref_init(&dev->ref);
 	dev->dev = get_device(parent);
 	dev->driver = driver;
diff --git a/drivers/gpu/drm/i810/i810_drv.c b/drivers/gpu/drm/i810/i810_drv.c
index 0e53a066d4db..55f17f00bae9 100644
--- a/drivers/gpu/drm/i810/i810_drv.c
+++ b/drivers/gpu/drm/i810/i810_drv.c
@@ -56,6 +56,9 @@ static const struct file_operations i810_driver_fops = {
 	.llseek = noop_llseek,
 };

+static struct drm_legacy_state = i810_legacy_state {
+};
+
 static struct drm_driver driver = {
 	.driver_features = DRIVER_USE_AGP | DRIVER_HAVE_DMA | DRIVER_LEGACY,
 	.dev_priv_size = sizeof(drm_i810_buf_priv_t),
@@ -71,6 +74,7 @@ static struct drm_driver driver = {
 	.major = DRIVER_MAJOR,
 	.minor = DRIVER_MINOR,
 	.patchlevel = DRIVER_PATCHLEVEL,
+	.legacy = &i810_legacy_state,
 };

 static struct pci_driver i810_pci_driver = {
diff --git a/drivers/gpu/drm/mga/mga_drv.c b/drivers/gpu/drm/mga/mga_drv.c
index 71128e6f6ae9..4865982d949c 100644
--- a/drivers/gpu/drm/mga/mga_drv.c
+++ b/drivers/gpu/drm/mga/mga_drv.c
@@ -53,6 +53,9 @@ static const struct file_operations mga_driver_fops = {
 	.llseek = noop_llseek,
 };

+static struct drm_legacy_state = mga_legacy_state {
+};
+
 static struct drm_driver driver = {
 	.driver_features  	    DRIVER_USE_AGP | DRIVER_PCI_DMA | DRIVER_LEGACY |
@@ -78,6 +81,7 @@ static struct drm_driver driver = {
 	.major = DRIVER_MAJOR,
 	.minor = DRIVER_MINOR,
 	.patchlevel = DRIVER_PATCHLEVEL,
+	.legacy = &mga_legacy_state,
 };

 static struct pci_driver mga_pci_driver = {
diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c
b/drivers/gpu/drm/nouveau/nouveau_drm.c
index 6b1629c14dd7..c88cf32e521c 100644
--- a/drivers/gpu/drm/nouveau/nouveau_drm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_drm.c
@@ -1103,6 +1103,11 @@ nouveau_driver_fops = {
 	.llseek = noop_llseek,
 };

+#if defined(CONFIG_NOUVEAU_LEGACY_CTX_SUPPORT)
+static struct drm_legacy_state nouveau_legacy_state{
+};
+#endif
+
 static struct drm_driver
 driver_stub = {
 	.driver_features @@ -1150,6 +1155,9 @@ driver_stub = {
 	.major = DRIVER_MAJOR,
 	.minor = DRIVER_MINOR,
 	.patchlevel = DRIVER_PATCHLEVEL,
+#if defined(CONFIG_NOUVEAU_LEGACY_CTX_SUPPORT)
+	.legacy = &nouveau_legacy_state,
+#endif
 };

 static struct pci_device_id
diff --git a/drivers/gpu/drm/r128/r128_drv.c b/drivers/gpu/drm/r128/r128_drv.c
index b7a5f162ebae..ecece3a48d93 100644
--- a/drivers/gpu/drm/r128/r128_drv.c
+++ b/drivers/gpu/drm/r128/r128_drv.c
@@ -57,6 +57,9 @@ static const struct file_operations r128_driver_fops = {
 	.llseek = noop_llseek,
 };

+static struct drm_legacy_state = r128_legacy_state {
+};
+
 static struct drm_driver driver = {
 	.driver_features  	    DRIVER_USE_AGP | DRIVER_PCI_DMA | DRIVER_SG |
DRIVER_LEGACY |
@@ -81,6 +84,7 @@ static struct drm_driver driver = {
 	.major = DRIVER_MAJOR,
 	.minor = DRIVER_MINOR,
 	.patchlevel = DRIVER_PATCHLEVEL,
+	.legacy = &r128_legacy_state,
 };

 int r128_driver_load(struct drm_device *dev, unsigned long flags)
diff --git a/drivers/gpu/drm/savage/savage_drv.c
b/drivers/gpu/drm/savage/savage_drv.c
index 799bd11adb9c..c0a7146fbde1 100644
--- a/drivers/gpu/drm/savage/savage_drv.c
+++ b/drivers/gpu/drm/savage/savage_drv.c
@@ -47,6 +47,9 @@ static const struct file_operations savage_driver_fops = {
 	.llseek = noop_llseek,
 };

+static struct drm_legacy_state = savage_legacy_state {
+};
+
 static struct drm_driver driver = {
 	.driver_features  	    DRIVER_USE_AGP | DRIVER_HAVE_DMA | DRIVER_PCI_DMA |
DRIVER_LEGACY,
@@ -65,6 +68,7 @@ static struct drm_driver driver = {
 	.major = DRIVER_MAJOR,
 	.minor = DRIVER_MINOR,
 	.patchlevel = DRIVER_PATCHLEVEL,
+	.legacy = &savage_legacy_state,
 };

 static struct pci_driver savage_pci_driver = {
diff --git a/drivers/gpu/drm/sis/sis_drv.c b/drivers/gpu/drm/sis/sis_drv.c
index 2c54b33abb54..1c794a82c8e6 100644
--- a/drivers/gpu/drm/sis/sis_drv.c
+++ b/drivers/gpu/drm/sis/sis_drv.c
@@ -99,6 +99,9 @@ static void sis_driver_postclose(struct drm_device *dev,
struct drm_file *file)
 	kfree(file_priv);
 }

+static struct drm_legacy_state = sis_legacy_state {
+};
+
 static struct drm_driver driver = {
 	.driver_features = DRIVER_USE_AGP | DRIVER_LEGACY,
 	.load = sis_driver_load,
@@ -116,6 +119,7 @@ static struct drm_driver driver = {
 	.major = DRIVER_MAJOR,
 	.minor = DRIVER_MINOR,
 	.patchlevel = DRIVER_PATCHLEVEL,
+	.legacy = &sis_legacy_state,
 };

 static struct pci_driver sis_pci_driver = {
diff --git a/drivers/gpu/drm/tdfx/tdfx_drv.c b/drivers/gpu/drm/tdfx/tdfx_drv.c
index ab699bf0ac5c..17aa93d82d6b 100644
--- a/drivers/gpu/drm/tdfx/tdfx_drv.c
+++ b/drivers/gpu/drm/tdfx/tdfx_drv.c
@@ -56,6 +56,9 @@ static const struct file_operations tdfx_driver_fops = {
 	.llseek = noop_llseek,
 };

+static struct drm_legacy_state = tdfx_legacy_state {
+};
+
 static struct drm_driver driver = {
 	.driver_features = DRIVER_LEGACY,
 	.fops = &tdfx_driver_fops,
@@ -65,6 +68,7 @@ static struct drm_driver driver = {
 	.major = DRIVER_MAJOR,
 	.minor = DRIVER_MINOR,
 	.patchlevel = DRIVER_PATCHLEVEL,
+	.legacy = &tdfx_legacy_state,
 };

 static struct pci_driver tdfx_pci_driver = {
diff --git a/drivers/gpu/drm/via/via_drv.c b/drivers/gpu/drm/via/via_drv.c
index 5da38082821f..22113d93ecdd 100644
--- a/drivers/gpu/drm/via/via_drv.c
+++ b/drivers/gpu/drm/via/via_drv.c
@@ -71,6 +71,9 @@ static const struct file_operations via_driver_fops = {
 	.llseek = noop_llseek,
 };

+static struct drm_legacy_state = via_legacy_state {
+};
+
 static struct drm_driver driver = {
 	.driver_features  	    DRIVER_USE_AGP | DRIVER_HAVE_IRQ | DRIVER_LEGACY,
@@ -97,6 +100,7 @@ static struct drm_driver driver = {
 	.major = DRIVER_MAJOR,
 	.minor = DRIVER_MINOR,
 	.patchlevel = DRIVER_PATCHLEVEL,
+	.legacy = &via_legacy_state,
 };

 static struct pci_driver via_pci_driver = {
diff --git a/include/drm/drm_drv.h b/include/drm/drm_drv.h
index 97109df5beac..94078af0cc28 100644
--- a/include/drm/drm_drv.h
+++ b/include/drm/drm_drv.h
@@ -40,6 +40,7 @@ struct dma_buf_attachment;
 struct drm_display_mode;
 struct drm_mode_create_dumb;
 struct drm_printer;
+struct drm_legacy_state;

 /**
  * enum drm_driver_feature - feature flags
@@ -599,6 +600,8 @@ struct drm_driver {
 	const struct file_operations *fops;

 	/* Everything below here is for legacy driver, never use! */
+	struct drm_legacy_state *legacy;
+
 	/* private: */

 	/* List of devices hanging off this driver with stealth attach. */
diff --git a/include/drm/drm_legacy.h b/include/drm/drm_legacy.h
index dcef3598f49e..c98a29e1c2b3 100644
--- a/include/drm/drm_legacy.h
+++ b/include/drm/drm_legacy.h
@@ -49,6 +49,12 @@ struct pci_driver;
  * you're doing it terribly wrong.
  */

+/**
+ * State for non-KMS drivers.
+ */
+struct drm_legacy_state {
+};
+
 /**
  * DMA buffer.
  */
--
2.25.0