[PATCH 04/17] drm/i915: Use drm_i915_private directly from drv_get_drvdata()

Chris Wilson
2019-07-30T13:32:34Z

As we store a pointer to i915 in the drvdata field (as the pointer is both
an alias to the drm_device and drm_i915_private), we can use the stored
pointer directly as the i915 device.

v2: Store and use i915 inside drv_get_drvdata()

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
drivers/gpu/drm/i915/i915_drv.c | 151 +++++++++---------
drivers/gpu/drm/i915/i915_drv.h | 9 +-
drivers/gpu/drm/i915/i915_pci.c | 12 +-
.../gpu/drm/i915/selftests/i915_selftest.c | 2 +-
4 files changed, 89 insertions(+), 85 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index f2d3d754af37..cfeca160e71b 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -640,39 +640,45 @@ static unsigned int i915_vga_set_decode(void *cookie, bool state)
return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
}

-static int i915_resume_switcheroo(struct drm_device *dev);
-static int i915_suspend_switcheroo(struct drm_device *dev, pm_message_t state);
+static int i915_resume_switcheroo(struct drm_i915_private *i915);
+static int i915_suspend_switcheroo(struct drm_i915_private *i915,
+ pm_message_t state);

static void i915_switcheroo_set_state(struct pci_dev *pdev, enum vga_switcheroo_state state)
{
- struct drm_device *dev = pci_get_drvdata(pdev);
+ struct drm_i915_private *i915 = pdev_to_i915(pdev);
pm_message_t pmm = { .event = PM_EVENT_SUSPEND };

+ if (!i915) {
+ dev_err(&pdev->dev, "DRM not initialized, aborting switch.\n");
+ return;
+ }
+
if (state == VGA_SWITCHEROO_ON) {
pr_info("switched on\n");
- dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
+ i915->drm.switch_power_state = DRM_SWITCH_POWER_CHANGING;
/* i915 resume handler doesn't set to D0 */
pci_set_power_state(pdev, PCI_D0);
- i915_resume_switcheroo(dev);
- dev->switch_power_state = DRM_SWITCH_POWER_ON;
+ i915_resume_switcheroo(i915);
+ i915->drm.switch_power_state = DRM_SWITCH_POWER_ON;
} else {
pr_info("switched off\n");
- dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
- i915_suspend_switcheroo(dev, pmm);
- dev->switch_power_state = DRM_SWITCH_POWER_OFF;
+ i915->drm.switch_power_state = DRM_SWITCH_POWER_CHANGING;
+ i915_suspend_switcheroo(i915, pmm);
+ i915->drm.switch_power_state = DRM_SWITCH_POWER_OFF;
}
}

static bool i915_switcheroo_can_switch(struct pci_dev *pdev)
{
- struct drm_device *dev = pci_get_drvdata(pdev);
+ struct drm_i915_private *i915 = pci_get_drvdata(pdev);

/*
* FIXME: open_count is protected by drm_global_mutex but that would lead to
* locking inversion with the driver load path. And the access here is
* completely racy anyway. So don't bother with locking for now.
*/
- return dev->open_count == 0;
+ return i915 && i915->drm.open_count == 0;
}

static const struct vga_switcheroo_client_ops i915_switcheroo_ops = {
@@ -1841,7 +1847,8 @@ i915_driver_create(struct pci_dev *pdev, const struct pci_device_id *ent)

i915->drm.pdev = pdev;
i915->drm.dev_private = i915;
- pci_set_drvdata(pdev, &i915->drm);
+ BUILD_BUG_ON(offsetof(typeof(*i915), drm));
+ pci_set_drvdata(pdev, i915);

/* Setup the write-once "constant" device info */
device_info = mkwrite_device_info(i915);
@@ -1941,51 +1948,50 @@ int i915_driver_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
return ret;
}

-void i915_driver_remove(struct drm_device *dev)
+void i915_driver_remove(struct drm_i915_private *i915)
{
- struct drm_i915_private *dev_priv = to_i915(dev);
- struct pci_dev *pdev = dev_priv->drm.pdev;
+ struct pci_dev *pdev = i915->drm.pdev;

- disable_rpm_wakeref_asserts(&dev_priv->runtime_pm);
+ disable_rpm_wakeref_asserts(&i915->runtime_pm);

- i915_driver_unregister(dev_priv);
+ i915_driver_unregister(i915);

/*
* After unregistering the device to prevent any new users, cancel
* all in-flight requests so that we can quickly unbind the active
* resources.
*/
- intel_gt_set_wedged(&dev_priv->gt);
+ intel_gt_set_wedged(&i915->gt);

/* Flush any external code that still may be under the RCU lock */
synchronize_rcu();

- i915_gem_suspend(dev_priv);
+ i915_gem_suspend(i915);

- drm_atomic_helper_shutdown(dev);
+ drm_atomic_helper_shutdown(&i915->drm);

- intel_gvt_driver_remove(dev_priv);
+ intel_gvt_driver_remove(i915);

- intel_modeset_driver_remove(dev);
+ intel_modeset_driver_remove(&i915->drm);

- intel_bios_driver_remove(dev_priv);
+ intel_bios_driver_remove(i915);

vga_switcheroo_unregister_client(pdev);
vga_client_register(pdev, NULL, NULL, NULL);

- intel_csr_ucode_fini(dev_priv);
+ intel_csr_ucode_fini(i915);

/* Free error state after interrupts are fully disabled. */
- cancel_delayed_work_sync(&dev_priv->gt.hangcheck.work);
- i915_reset_error_state(dev_priv);
+ cancel_delayed_work_sync(&i915->gt.hangcheck.work);
+ i915_reset_error_state(i915);

- i915_gem_driver_remove(dev_priv);
+ i915_gem_driver_remove(i915);

- intel_power_domains_driver_remove(dev_priv);
+ intel_power_domains_driver_remove(i915);

- i915_driver_hw_remove(dev_priv);
+ i915_driver_hw_remove(i915);

- enable_rpm_wakeref_asserts(&dev_priv->runtime_pm);
+ enable_rpm_wakeref_asserts(&i915->runtime_pm);
}

static void i915_driver_release(struct drm_device *dev)
@@ -2205,28 +2211,23 @@ static int i915_drm_suspend_late(struct drm_device *dev, bool hibernation)
return ret;
}

-static int i915_suspend_switcheroo(struct drm_device *dev, pm_message_t state)
+static int
+i915_suspend_switcheroo(struct drm_i915_private *i915, pm_message_t state)
{
int error;

- if (!dev) {
- DRM_ERROR("dev: %p\n", dev);
- DRM_ERROR("DRM not initialized, aborting suspend.\n");
- return -ENODEV;
- }
-
if (WARN_ON_ONCE(state.event != PM_EVENT_SUSPEND &&
state.event != PM_EVENT_FREEZE))
return -EINVAL;

- if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
+ if (i915->drm.switch_power_state == DRM_SWITCH_POWER_OFF)
return 0;

- error = i915_drm_suspend(dev);
+ error = i915_drm_suspend(&i915->drm);
if (error)
return error;

- return i915_drm_suspend_late(dev, false);
+ return i915_drm_suspend_late(&i915->drm, false);
}

static int i915_drm_resume(struct drm_device *dev)
@@ -2379,53 +2380,53 @@ static int i915_drm_resume_early(struct drm_device *dev)
return ret;
}

-static int i915_resume_switcheroo(struct drm_device *dev)
+static int i915_resume_switcheroo(struct drm_i915_private *i915)
{
int ret;

- if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
+ if (i915->drm.switch_power_state == DRM_SWITCH_POWER_OFF)
return 0;

- ret = i915_drm_resume_early(dev);
+ ret = i915_drm_resume_early(&i915->drm);
if (ret)
return ret;

- return i915_drm_resume(dev);
+ return i915_drm_resume(&i915->drm);
}

static int i915_pm_prepare(struct device *kdev)
{
- struct drm_device *dev = dev_get_drvdata(kdev);
+ struct drm_i915_private *i915 = kdev_to_i915(kdev);

- if (!dev) {
+ if (!i915) {
dev_err(kdev, "DRM not initialized, aborting suspend.\n");
return -ENODEV;
}

- if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
+ if (i915->drm.switch_power_state == DRM_SWITCH_POWER_OFF)
return 0;

- return i915_drm_prepare(dev);
+ return i915_drm_prepare(&i915->drm);
}

static int i915_pm_suspend(struct device *kdev)
{
- struct drm_device *dev = dev_get_drvdata(kdev);
+ struct drm_i915_private *i915 = kdev_to_i915(kdev);

- if (!dev) {
+ if (!i915) {
dev_err(kdev, "DRM not initialized, aborting suspend.\n");
return -ENODEV;
}

- if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
+ if (i915->drm.switch_power_state == DRM_SWITCH_POWER_OFF)
return 0;

- return i915_drm_suspend(dev);
+ return i915_drm_suspend(&i915->drm);
}

static int i915_pm_suspend_late(struct device *kdev)
{
- struct drm_device *dev = &kdev_to_i915(kdev)->drm;
+ struct drm_i915_private *i915 = kdev_to_i915(kdev);

/*
* We have a suspend ordering issue with the snd-hda driver also
@@ -2436,55 +2437,55 @@ static int i915_pm_suspend_late(struct device *kdev)
* FIXME: This should be solved with a special hdmi sink device or
* similar so that power domains can be employed.
*/
- if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
+ if (i915->drm.switch_power_state == DRM_SWITCH_POWER_OFF)
return 0;

- return i915_drm_suspend_late(dev, false);
+ return i915_drm_suspend_late(&i915->drm, false);
}

static int i915_pm_poweroff_late(struct device *kdev)
{
- struct drm_device *dev = &kdev_to_i915(kdev)->drm;
+ struct drm_i915_private *i915 = kdev_to_i915(kdev);

- if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
+ if (i915->drm.switch_power_state == DRM_SWITCH_POWER_OFF)
return 0;

- return i915_drm_suspend_late(dev, true);
+ return i915_drm_suspend_late(&i915->drm, true);
}

static int i915_pm_resume_early(struct device *kdev)
{
- struct drm_device *dev = &kdev_to_i915(kdev)->drm;
+ struct drm_i915_private *i915 = kdev_to_i915(kdev);

- if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
+ if (i915->drm.switch_power_state == DRM_SWITCH_POWER_OFF)
return 0;

- return i915_drm_resume_early(dev);
+ return i915_drm_resume_early(&i915->drm);
}

static int i915_pm_resume(struct device *kdev)
{
- struct drm_device *dev = &kdev_to_i915(kdev)->drm;
+ struct drm_i915_private *i915 = kdev_to_i915(kdev);

- if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
+ if (i915->drm.switch_power_state == DRM_SWITCH_POWER_OFF)
return 0;

- return i915_drm_resume(dev);
+ return i915_drm_resume(&i915->drm);
}

/* freeze: before creating the hibernation_image */
static int i915_pm_freeze(struct device *kdev)
{
- struct drm_device *dev = &kdev_to_i915(kdev)->drm;
+ struct drm_i915_private *i915 = kdev_to_i915(kdev);
int ret;

- if (dev->switch_power_state != DRM_SWITCH_POWER_OFF) {
- ret = i915_drm_suspend(dev);
+ if (i915->drm.switch_power_state != DRM_SWITCH_POWER_OFF) {
+ ret = i915_drm_suspend(&i915->drm);
if (ret)
return ret;
}

- ret = i915_gem_freeze(kdev_to_i915(kdev));
+ ret = i915_gem_freeze(i915);
if (ret)
return ret;

@@ -2493,16 +2494,16 @@ static int i915_pm_freeze(struct device *kdev)

static int i915_pm_freeze_late(struct device *kdev)
{
- struct drm_device *dev = &kdev_to_i915(kdev)->drm;
+ struct drm_i915_private *i915 = kdev_to_i915(kdev);
int ret;

- if (dev->switch_power_state != DRM_SWITCH_POWER_OFF) {
- ret = i915_drm_suspend_late(dev, true);
+ if (i915->drm.switch_power_state != DRM_SWITCH_POWER_OFF) {
+ ret = i915_drm_suspend_late(&i915->drm, true);
if (ret)
return ret;
}

- ret = i915_gem_freeze_late(kdev_to_i915(kdev));
+ ret = i915_gem_freeze_late(i915);
if (ret)
return ret;

@@ -2904,8 +2905,7 @@ static int vlv_resume_prepare(struct drm_i915_private *dev_priv,

static int intel_runtime_suspend(struct device *kdev)
{
- struct drm_device *dev = dev_get_drvdata(kdev);
- struct drm_i915_private *dev_priv = to_i915(dev);
+ struct drm_i915_private *dev_priv = kdev_to_i915(kdev);
struct intel_runtime_pm *rpm = &dev_priv->runtime_pm;
int ret;

@@ -3002,8 +3002,7 @@ static int intel_runtime_suspend(struct device *kdev)

static int intel_runtime_resume(struct device *kdev)
{
- struct drm_device *dev = dev_get_drvdata(kdev);
- struct drm_i915_private *dev_priv = to_i915(dev);
+ struct drm_i915_private *dev_priv = kdev_to_i915(kdev);
struct intel_runtime_pm *rpm = &dev_priv->runtime_pm;
int ret = 0;

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 59d4a1146039..163965a15cc1 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1895,7 +1895,12 @@ static inline struct drm_i915_private *to_i915(const struct drm_device *dev)

static inline struct drm_i915_private *kdev_to_i915(struct device *kdev)
{
- return to_i915(dev_get_drvdata(kdev));
+ return dev_get_drvdata(kdev);
+}
+
+static inline struct drm_i915_private *pdev_to_i915(struct pci_dev *pdev)
+{
+ return pci_get_drvdata(pdev);
}

static inline struct drm_i915_private *wopcm_to_i915(struct intel_wopcm *wopcm)
@@ -2373,7 +2378,7 @@ long i915_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
extern const struct dev_pm_ops i915_pm_ops;

int i915_driver_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
-void i915_driver_remove(struct drm_device *dev);
+void i915_driver_remove(struct drm_i915_private *i915);

void intel_engine_init_hangcheck(struct intel_engine_cs *engine);
int vlv_force_gfx_clock(struct drm_i915_private *dev_priv, bool on);
diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
index bd9211b3d76e..2923a732879e 100644
--- a/drivers/gpu/drm/i915/i915_pci.c
+++ b/drivers/gpu/drm/i915/i915_pci.c
@@ -873,16 +873,16 @@ MODULE_DEVICE_TABLE(pci, pciidlist);

static void i915_pci_remove(struct pci_dev *pdev)
{
- struct drm_device *dev;
+ struct drm_i915_private *i915;

- dev = pci_get_drvdata(pdev);
- if (!dev) /* driver load aborted, nothing to cleanup */
+ i915 = pci_get_drvdata(pdev);
+ if (!i915) /* driver load aborted, nothing to cleanup */
return;

- i915_driver_remove(dev);
- drm_dev_put(dev);
-
+ i915_driver_remove(i915);
pci_set_drvdata(pdev, NULL);
+
+ drm_dev_put(&i915->drm);
}

/* is device_id present in comma separated list of ids */
diff --git a/drivers/gpu/drm/i915/selftests/i915_selftest.c b/drivers/gpu/drm/i915/selftests/i915_selftest.c
index db9c645bbdfe..c3f6216e84cd 100644
--- a/drivers/gpu/drm/i915/selftests/i915_selftest.c
+++ b/drivers/gpu/drm/i915/selftests/i915_selftest.c
@@ -185,7 +185,7 @@ int i915_live_selftests(struct pci_dev *pdev)
if (!i915_selftest.live)
return 0;

- err = run_selftests(live, to_i915(pci_get_drvdata(pdev)));
+ err = run_selftests(live, pci_get_drvdata(pdev));
if (err) {
i915_selftest.live = err;
return err;
--
2.22.0