[PATCH v2 14/14] drm: IRQ midlayer is now legacy
Thomas Zimmermann
tzimmermann at suse.de
Tue Aug 3 09:07:04 UTC 2021
Hide the DRM midlayer behind CONFIG_DRM_LEGACY, make functions use
the prefix drm_legacy_, and move declarations to drm_legacy.h.
In struct drm_device, move the fields irq and irq_enabled behind
CONFIG_DRM_LEGACY.
All callers have been updated.
Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de>
Acked-by: Sam Ravnborg <sam at ravnborg.org>
---
drivers/gpu/drm/drm_irq.c | 63 ++++---------------------------
drivers/gpu/drm/drm_legacy_misc.c | 3 +-
drivers/gpu/drm/drm_vblank.c | 8 ++--
drivers/gpu/drm/i810/i810_dma.c | 3 +-
drivers/gpu/drm/mga/mga_dma.c | 2 +-
drivers/gpu/drm/mga/mga_drv.h | 1 -
drivers/gpu/drm/r128/r128_cce.c | 3 +-
drivers/gpu/drm/via/via_mm.c | 3 +-
include/drm/drm_device.h | 18 ++-------
include/drm/drm_drv.h | 44 ++-------------------
include/drm/drm_irq.h | 31 ---------------
include/drm/drm_legacy.h | 3 ++
12 files changed, 27 insertions(+), 155 deletions(-)
delete mode 100644 include/drm/drm_irq.h
diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c
index dc6e38fa8a48..13e1d5c4ec82 100644
--- a/drivers/gpu/drm/drm_irq.c
+++ b/drivers/gpu/drm/drm_irq.c
@@ -60,46 +60,14 @@
#include <drm/drm.h>
#include <drm/drm_device.h>
#include <drm/drm_drv.h>
-#include <drm/drm_irq.h>
+#include <drm/drm_legacy.h>
#include <drm/drm_print.h>
#include <drm/drm_vblank.h>
#include "drm_internal.h"
-/**
- * DOC: irq helpers
- *
- * The DRM core provides very simple support helpers to enable IRQ handling on a
- * device through the drm_irq_install() and drm_irq_uninstall() functions. This
- * only supports devices with a single interrupt on the main device stored in
- * &drm_device.dev and set as the device paramter in drm_dev_alloc().
- *
- * These IRQ helpers are strictly optional. Since these helpers don't automatically
- * clean up the requested interrupt like e.g. devm_request_irq() they're not really
- * recommended.
- */
-
-/**
- * drm_irq_install - install IRQ handler
- * @dev: DRM device
- * @irq: IRQ number to install the handler for
- *
- * Initializes the IRQ related data. Installs the handler, calling the driver
- * &drm_driver.irq_preinstall and &drm_driver.irq_postinstall functions before
- * and after the installation.
- *
- * This is the simplified helper interface provided for drivers with no special
- * needs.
- *
- * @irq must match the interrupt number that would be passed to request_irq(),
- * if called directly instead of using this helper function.
- *
- * &drm_driver.irq_handler is called to handle the registered interrupt.
- *
- * Returns:
- * Zero on success or a negative error code on failure.
- */
-int drm_irq_install(struct drm_device *dev, int irq)
+#if IS_ENABLED(CONFIG_DRM_LEGACY)
+static int drm_legacy_irq_install(struct drm_device *dev, int irq)
{
int ret;
unsigned long sh_flags = 0;
@@ -144,24 +112,8 @@ int drm_irq_install(struct drm_device *dev, int irq)
return ret;
}
-EXPORT_SYMBOL(drm_irq_install);
-/**
- * drm_irq_uninstall - uninstall the IRQ handler
- * @dev: DRM device
- *
- * Calls the driver's &drm_driver.irq_uninstall function and unregisters the IRQ
- * handler. This should only be called by drivers which used drm_irq_install()
- * to set up their interrupt handler.
- *
- * Note that for kernel modesetting drivers it is a bug if this function fails.
- * The sanity checks are only to catch buggy user modesetting drivers which call
- * the same function through an ioctl.
- *
- * Returns:
- * Zero on success or a negative error code on failure.
- */
-int drm_irq_uninstall(struct drm_device *dev)
+int drm_legacy_irq_uninstall(struct drm_device *dev)
{
unsigned long irqflags;
bool irq_enabled;
@@ -207,9 +159,8 @@ int drm_irq_uninstall(struct drm_device *dev)
return 0;
}
-EXPORT_SYMBOL(drm_irq_uninstall);
+EXPORT_SYMBOL(drm_legacy_irq_uninstall);
-#if IS_ENABLED(CONFIG_DRM_LEGACY)
int drm_legacy_irq_control(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
@@ -238,13 +189,13 @@ int drm_legacy_irq_control(struct drm_device *dev, void *data,
ctl->irq != irq)
return -EINVAL;
mutex_lock(&dev->struct_mutex);
- ret = drm_irq_install(dev, irq);
+ ret = drm_legacy_irq_install(dev, irq);
mutex_unlock(&dev->struct_mutex);
return ret;
case DRM_UNINST_HANDLER:
mutex_lock(&dev->struct_mutex);
- ret = drm_irq_uninstall(dev);
+ ret = drm_legacy_irq_uninstall(dev);
mutex_unlock(&dev->struct_mutex);
return ret;
diff --git a/drivers/gpu/drm/drm_legacy_misc.c b/drivers/gpu/drm/drm_legacy_misc.c
index 83db43b7a25e..d4c5434062d7 100644
--- a/drivers/gpu/drm/drm_legacy_misc.c
+++ b/drivers/gpu/drm/drm_legacy_misc.c
@@ -35,7 +35,6 @@
#include <drm/drm_device.h>
#include <drm/drm_drv.h>
-#include <drm/drm_irq.h>
#include <drm/drm_print.h>
#include "drm_internal.h"
@@ -78,7 +77,7 @@ int drm_legacy_setup(struct drm_device * dev)
void drm_legacy_dev_reinit(struct drm_device *dev)
{
if (dev->irq_enabled)
- drm_irq_uninstall(dev);
+ drm_legacy_irq_uninstall(dev);
mutex_lock(&dev->struct_mutex);
diff --git a/drivers/gpu/drm/drm_vblank.c b/drivers/gpu/drm/drm_vblank.c
index bba6781cc48f..3e260f3e2863 100644
--- a/drivers/gpu/drm/drm_vblank.c
+++ b/drivers/gpu/drm/drm_vblank.c
@@ -1739,10 +1739,10 @@ static void drm_wait_vblank_reply(struct drm_device *dev, unsigned int pipe,
static bool drm_wait_vblank_supported(struct drm_device *dev)
{
- if (IS_ENABLED(CONFIG_DRM_LEGACY)) {
- if (unlikely(drm_core_check_feature(dev, DRIVER_LEGACY)))
- return dev->irq_enabled;
- }
+#if IS_ENABLED(CONFIG_DRM_LEGACY)
+ if (unlikely(drm_core_check_feature(dev, DRIVER_LEGACY)))
+ return dev->irq_enabled;
+#endif
return drm_dev_has_vblank(dev);
}
diff --git a/drivers/gpu/drm/i810/i810_dma.c b/drivers/gpu/drm/i810/i810_dma.c
index d78c82af367c..9fb4dd63342f 100644
--- a/drivers/gpu/drm/i810/i810_dma.c
+++ b/drivers/gpu/drm/i810/i810_dma.c
@@ -38,7 +38,6 @@
#include <drm/drm_drv.h>
#include <drm/drm_file.h>
#include <drm/drm_ioctl.h>
-#include <drm/drm_irq.h>
#include <drm/drm_print.h>
#include <drm/i810_drm.h>
@@ -209,7 +208,7 @@ static int i810_dma_cleanup(struct drm_device *dev)
* is freed, it's too late.
*/
if (drm_core_check_feature(dev, DRIVER_HAVE_IRQ) && dev->irq_enabled)
- drm_irq_uninstall(dev);
+ drm_legacy_irq_uninstall(dev);
if (dev->dev_private) {
int i;
diff --git a/drivers/gpu/drm/mga/mga_dma.c b/drivers/gpu/drm/mga/mga_dma.c
index 403efc1f1a7c..331c2f0da57a 100644
--- a/drivers/gpu/drm/mga/mga_dma.c
+++ b/drivers/gpu/drm/mga/mga_dma.c
@@ -949,7 +949,7 @@ static int mga_do_cleanup_dma(struct drm_device *dev, int full_cleanup)
* is freed, it's too late.
*/
if (dev->irq_enabled)
- drm_irq_uninstall(dev);
+ drm_legacy_irq_uninstall(dev);
if (dev->dev_private) {
drm_mga_private_t *dev_priv = dev->dev_private;
diff --git a/drivers/gpu/drm/mga/mga_drv.h b/drivers/gpu/drm/mga/mga_drv.h
index 84395d81ab9b..f61401c70b90 100644
--- a/drivers/gpu/drm/mga/mga_drv.h
+++ b/drivers/gpu/drm/mga/mga_drv.h
@@ -38,7 +38,6 @@
#include <drm/drm_device.h>
#include <drm/drm_file.h>
#include <drm/drm_ioctl.h>
-#include <drm/drm_irq.h>
#include <drm/drm_legacy.h>
#include <drm/drm_print.h>
#include <drm/drm_sarea.h>
diff --git a/drivers/gpu/drm/r128/r128_cce.c b/drivers/gpu/drm/r128/r128_cce.c
index 2a2933c16308..c04d84a69dd2 100644
--- a/drivers/gpu/drm/r128/r128_cce.c
+++ b/drivers/gpu/drm/r128/r128_cce.c
@@ -39,7 +39,6 @@
#include <drm/drm_device.h>
#include <drm/drm_file.h>
-#include <drm/drm_irq.h>
#include <drm/drm_legacy.h>
#include <drm/drm_print.h>
#include <drm/r128_drm.h>
@@ -603,7 +602,7 @@ int r128_do_cleanup_cce(struct drm_device *dev)
* is freed, it's too late.
*/
if (dev->irq_enabled)
- drm_irq_uninstall(dev);
+ drm_legacy_irq_uninstall(dev);
if (dev->dev_private) {
drm_r128_private_t *dev_priv = dev->dev_private;
diff --git a/drivers/gpu/drm/via/via_mm.c b/drivers/gpu/drm/via/via_mm.c
index dae1bacd86c1..c9afa1a51f23 100644
--- a/drivers/gpu/drm/via/via_mm.c
+++ b/drivers/gpu/drm/via/via_mm.c
@@ -29,7 +29,6 @@
#include <drm/drm_device.h>
#include <drm/drm_file.h>
-#include <drm/drm_irq.h>
#include <drm/via_drm.h>
#include "via_drv.h"
@@ -86,7 +85,7 @@ int via_final_context(struct drm_device *dev, int context)
/* Last context, perform cleanup */
if (list_is_singular(&dev->ctxlist)) {
DRM_DEBUG("Last Context\n");
- drm_irq_uninstall(dev);
+ drm_legacy_irq_uninstall(dev);
via_cleanup_futex(dev_priv);
via_do_cleanup_map(dev);
}
diff --git a/include/drm/drm_device.h b/include/drm/drm_device.h
index f588f967bb14..604b1d1b2d72 100644
--- a/include/drm/drm_device.h
+++ b/include/drm/drm_device.h
@@ -191,20 +191,6 @@ struct drm_device {
*/
struct list_head clientlist;
- /**
- * @irq_enabled:
- *
- * Indicates that interrupt handling is enabled, specifically vblank
- * handling. Drivers which don't use drm_irq_install() need to set this
- * to true manually.
- */
- bool irq_enabled;
-
- /**
- * @irq: Used by the drm_irq_install() and drm_irq_unistall() helpers.
- */
- int irq;
-
/**
* @vblank_disable_immediate:
*
@@ -372,6 +358,10 @@ struct drm_device {
/* Scatter gather memory */
struct drm_sg_mem *sg;
+
+ /* IRQs */
+ bool irq_enabled;
+ int irq;
#endif
};
diff --git a/include/drm/drm_drv.h b/include/drm/drm_drv.h
index b439ae1921b8..0cd95953cdf5 100644
--- a/include/drm/drm_drv.h
+++ b/include/drm/drm_drv.h
@@ -137,10 +137,6 @@ enum drm_driver_feature {
* @DRIVER_HAVE_IRQ:
*
* Legacy irq support. Only for legacy drivers. Do not use.
- *
- * New drivers can either use the drm_irq_install() and
- * drm_irq_uninstall() helper functions, or roll their own irq support
- * code by calling request_irq() directly.
*/
DRIVER_HAVE_IRQ = BIT(30),
/**
@@ -271,42 +267,6 @@ struct drm_driver {
*/
void (*release) (struct drm_device *);
- /**
- * @irq_handler:
- *
- * Interrupt handler called when using drm_irq_install(). Not used by
- * drivers which implement their own interrupt handling.
- */
- irqreturn_t(*irq_handler) (int irq, void *arg);
-
- /**
- * @irq_preinstall:
- *
- * Optional callback used by drm_irq_install() which is called before
- * the interrupt handler is registered. This should be used to clear out
- * any pending interrupts (from e.g. firmware based drives) and reset
- * the interrupt handling registers.
- */
- void (*irq_preinstall) (struct drm_device *dev);
-
- /**
- * @irq_postinstall:
- *
- * Optional callback used by drm_irq_install() which is called after
- * the interrupt handler is registered. This should be used to enable
- * interrupt generation in the hardware.
- */
- int (*irq_postinstall) (struct drm_device *dev);
-
- /**
- * @irq_uninstall:
- *
- * Optional callback used by drm_irq_uninstall() which is called before
- * the interrupt handler is unregistered. This should be used to disable
- * interrupt generation in the hardware.
- */
- void (*irq_uninstall) (struct drm_device *dev);
-
/**
* @master_set:
*
@@ -504,6 +464,10 @@ struct drm_driver {
int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv);
int (*dma_quiescent) (struct drm_device *);
int (*context_dtor) (struct drm_device *dev, int context);
+ irqreturn_t (*irq_handler)(int irq, void *arg);
+ void (*irq_preinstall)(struct drm_device *dev);
+ int (*irq_postinstall)(struct drm_device *dev);
+ void (*irq_uninstall)(struct drm_device *dev);
u32 (*get_vblank_counter)(struct drm_device *dev, unsigned int pipe);
int (*enable_vblank)(struct drm_device *dev, unsigned int pipe);
void (*disable_vblank)(struct drm_device *dev, unsigned int pipe);
diff --git a/include/drm/drm_irq.h b/include/drm/drm_irq.h
deleted file mode 100644
index 53634b988f57..000000000000
--- a/include/drm/drm_irq.h
+++ /dev/null
@@ -1,31 +0,0 @@
-/*
- * Copyright 2016 Intel Corp.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice (including the next
- * paragraph) shall be included in all copies or substantial portions of the
- * Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
- * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
- * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
- * OTHER DEALINGS IN THE SOFTWARE.
- */
-
-#ifndef _DRM_IRQ_H_
-#define _DRM_IRQ_H_
-
-struct drm_device;
-
-int drm_irq_install(struct drm_device *dev, int irq);
-int drm_irq_uninstall(struct drm_device *dev);
-#endif
diff --git a/include/drm/drm_legacy.h b/include/drm/drm_legacy.h
index b17e79e12bc2..58dc8d8cc907 100644
--- a/include/drm/drm_legacy.h
+++ b/include/drm/drm_legacy.h
@@ -192,6 +192,9 @@ do { \
void drm_legacy_idlelock_take(struct drm_lock_data *lock);
void drm_legacy_idlelock_release(struct drm_lock_data *lock);
+/* drm_irq.c */
+int drm_legacy_irq_uninstall(struct drm_device *dev);
+
/* drm_pci.c */
#ifdef CONFIG_PCI
--
2.32.0
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