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path: root/drivers/gpu/drm/via/via_drv.h
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Diffstat (limited to 'drivers/gpu/drm/via/via_drv.h')
-rw-r--r--drivers/gpu/drm/via/via_drv.h75
1 files changed, 69 insertions, 6 deletions
diff --git a/drivers/gpu/drm/via/via_drv.h b/drivers/gpu/drm/via/via_drv.h
index 6d1ae834484c..d5ad1b05bf77 100644
--- a/drivers/gpu/drm/via/via_drv.h
+++ b/drivers/gpu/drm/via/via_drv.h
@@ -24,8 +24,16 @@
#ifndef _VIA_DRV_H_
#define _VIA_DRV_H_
-#include <drm/drm_mm.h>
+#include <linux/irqreturn.h>
+#include <linux/jiffies.h>
+#include <linux/sched.h>
+#include <linux/sched/signal.h>
+#include <linux/wait.h>
+
+#include <drm/drm_ioctl.h>
#include <drm/drm_legacy.h>
+#include <drm/drm_mm.h>
+#include <drm/via_drm.h>
#define DRIVER_AUTHOR "Various"
@@ -113,12 +121,67 @@ enum via_family {
};
/* VIA MMIO register access */
-#define VIA_BASE ((dev_priv->mmio))
+static inline u32 via_read(struct drm_via_private *dev_priv, u32 reg)
+{
+ return readl((void __iomem *)(dev_priv->mmio->handle + reg));
+}
+
+static inline void via_write(struct drm_via_private *dev_priv, u32 reg,
+ u32 val)
+{
+ writel(val, (void __iomem *)(dev_priv->mmio->handle + reg));
+}
+
+static inline void via_write8(struct drm_via_private *dev_priv, u32 reg,
+ u32 val)
+{
+ writeb(val, (void __iomem *)(dev_priv->mmio->handle + reg));
+}
+
+static inline void via_write8_mask(struct drm_via_private *dev_priv,
+ u32 reg, u32 mask, u32 val)
+{
+ u32 tmp;
+
+ tmp = readb((void __iomem *)(dev_priv->mmio->handle + reg));
+ tmp = (tmp & ~mask) | (val & mask);
+ writeb(tmp, (void __iomem *)(dev_priv->mmio->handle + reg));
+}
-#define VIA_READ(reg) DRM_READ32(VIA_BASE, reg)
-#define VIA_WRITE(reg, val) DRM_WRITE32(VIA_BASE, reg, val)
-#define VIA_READ8(reg) DRM_READ8(VIA_BASE, reg)
-#define VIA_WRITE8(reg, val) DRM_WRITE8(VIA_BASE, reg, val)
+/*
+ * Poll in a loop waiting for 'contidition' to be true.
+ * Note: A direct replacement with wait_event_interruptible_timeout()
+ * will not work unless driver is updated to emit wake_up()
+ * in relevant places that can impact the 'condition'
+ *
+ * Returns:
+ * ret keeps current value if 'condition' becomes true
+ * ret = -BUSY if timeout happens
+ * ret = -EINTR if a signal interrupted the waiting period
+ */
+#define VIA_WAIT_ON( ret, queue, timeout, condition ) \
+do { \
+ DECLARE_WAITQUEUE(entry, current); \
+ unsigned long end = jiffies + (timeout); \
+ add_wait_queue(&(queue), &entry); \
+ \
+ for (;;) { \
+ __set_current_state(TASK_INTERRUPTIBLE); \
+ if (condition) \
+ break; \
+ if (time_after_eq(jiffies, end)) { \
+ ret = -EBUSY; \
+ break; \
+ } \
+ schedule_timeout((HZ/100 > 1) ? HZ/100 : 1); \
+ if (signal_pending(current)) { \
+ ret = -EINTR; \
+ break; \
+ } \
+ } \
+ __set_current_state(TASK_RUNNING); \
+ remove_wait_queue(&(queue), &entry); \
+} while (0)
extern const struct drm_ioctl_desc via_ioctls[];
extern int via_max_ioctl;