drm/mga: drop dependency on drm_os_linux.h

Opencode all macros used from the deprecated drm_os_linux.h header file.
The DRM_WAIT_ON used 3 * HZ as timeout.
This was translated to 3000 msec.

The return value of mga_driver_fence_wait() was not
used, so make it return void to simplify code a bit.

v2:
- fixed timeout to 3000 msec (original value was 3 * Hz)
- drop unused return value from mga_driver_fence_wait()

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: David Airlie <airlied@linux.ie>
Link: https://patchwork.freedesktop.org/patch/msgid/20190623103542.30697-2-sam@ravnborg.org

drivers/gpu/drm/mga/mga_dma.c

@@ -35,6 +35,8 @@
  * \author Gareth Hughes <gareth@valinux.com>
  */
 
+#include <linux/delay.h>
+
 #include <drm/drmP.h>
 #include <drm/mga_drm.h>
 #include "mga_drv.h"
@@ -62,7 +64,7 @@ int mga_do_wait_for_idle(drm_mga_private_t *dev_priv)
 			MGA_WRITE8(MGA_CRTC_INDEX, 0);
 			return 0;
 		}
-		DRM_UDELAY(1);
+		udelay(1);
 	}
 
 #if MGA_DMA_DEBUG
@@ -114,7 +116,7 @@ void mga_do_dma_flush(drm_mga_private_t *dev_priv)
 		status = MGA_READ(MGA_STATUS) & MGA_ENGINE_IDLE_MASK;
 		if (status == MGA_ENDPRDMASTS)
 			break;
-		DRM_UDELAY(1);
+		udelay(1);
 	}
 
 	if (primary->tail == primary->last_flush) {
@@ -1120,15 +1122,16 @@ int mga_dma_buffers(struct drm_device *dev, void *data,
 	 */
 	if (d->send_count != 0) {
 		DRM_ERROR("Process %d trying to send %d buffers via drmDMA\n",
-			  DRM_CURRENTPID, d->send_count);
+			  task_pid_nr(current), d->send_count);
 		return -EINVAL;
 	}
 
 	/* We'll send you buffers.
 	 */
 	if (d->request_count < 0 || d->request_count > dma->buf_count) {
 		DRM_ERROR("Process %d trying to get %d buffers (of %d max)\n",
-			  DRM_CURRENTPID, d->request_count, dma->buf_count);
+			  task_pid_nr(current), d->request_count,
+			  dma->buf_count);
 		return -EINVAL;
 	}
 

drivers/gpu/drm/mga/mga_drv.h

@@ -188,7 +188,7 @@ extern int mga_warp_init(drm_mga_private_t *dev_priv);
 extern int mga_enable_vblank(struct drm_device *dev, unsigned int pipe);
 extern void mga_disable_vblank(struct drm_device *dev, unsigned int pipe);
 extern u32 mga_get_vblank_counter(struct drm_device *dev, unsigned int pipe);
-extern int mga_driver_fence_wait(struct drm_device *dev, unsigned int *sequence);
+extern void mga_driver_fence_wait(struct drm_device *dev, unsigned int *sequence);
 extern int mga_driver_vblank_wait(struct drm_device *dev, unsigned int *sequence);
 extern irqreturn_t mga_driver_irq_handler(int irq, void *arg);
 extern void mga_driver_irq_preinstall(struct drm_device *dev);
@@ -199,10 +199,14 @@ extern long mga_compat_ioctl(struct file *filp, unsigned int cmd,
 
 #define mga_flush_write_combine()	wmb()
 
-#define MGA_READ8(reg)		DRM_READ8(dev_priv->mmio, (reg))
-#define MGA_READ(reg)		DRM_READ32(dev_priv->mmio, (reg))
-#define MGA_WRITE8(reg, val)	DRM_WRITE8(dev_priv->mmio, (reg), (val))
-#define MGA_WRITE(reg, val)	DRM_WRITE32(dev_priv->mmio, (reg), (val))
+#define MGA_READ8(reg) \
+	readb(((void __iomem *)dev_priv->mmio->handle) + (reg))
+#define MGA_READ(reg) \
+	readl(((void __iomem *)dev_priv->mmio->handle) + (reg))
+#define MGA_WRITE8(reg, val) \
+	writeb(val, ((void __iomem *)dev_priv->mmio->handle) + (reg))
+#define MGA_WRITE(reg, val) \
+	writel(val, ((void __iomem *)dev_priv->mmio->handle) + (reg))
 
 #define DWGREG0		0x1c00
 #define DWGREG0_END	0x1dff

drivers/gpu/drm/mga/mga_irq.c

@@ -118,23 +118,21 @@ void mga_disable_vblank(struct drm_device *dev, unsigned int pipe)
 	/* MGA_WRITE(MGA_IEN, MGA_VLINEIEN | MGA_SOFTRAPEN); */
 }
 
-int mga_driver_fence_wait(struct drm_device *dev, unsigned int *sequence)
+void mga_driver_fence_wait(struct drm_device *dev, unsigned int *sequence)
 {
 	drm_mga_private_t *dev_priv = (drm_mga_private_t *) dev->dev_private;
 	unsigned int cur_fence;
-	int ret = 0;
 
 	/* Assume that the user has missed the current sequence number
 	 * by about a day rather than she wants to wait for years
 	 * using fences.
 	 */
-	DRM_WAIT_ON(ret, dev_priv->fence_queue, 3 * HZ,
+	wait_event_timeout(dev_priv->fence_queue,
 		    (((cur_fence = atomic_read(&dev_priv->last_fence_retired))
-		      - *sequence) <= (1 << 23)));
+		      - *sequence) <= (1 << 23)),
+		    msecs_to_jiffies(3000));
 
 	*sequence = cur_fence;
-
-	return ret;
 }
 
 void mga_driver_irq_preinstall(struct drm_device *dev)

drivers/gpu/drm/mga/mga_state.c

@@ -1016,7 +1016,7 @@ int mga_getparam(struct drm_device *dev, void *data, struct drm_file *file_priv)
 		return -EINVAL;
 	}
 
-	DRM_DEBUG("pid=%d\n", DRM_CURRENTPID);
+	DRM_DEBUG("pid=%d\n", task_pid_nr(current));
 
 	switch (param->param) {
 	case MGA_PARAM_IRQ_NR:
@@ -1048,7 +1048,7 @@ static int mga_set_fence(struct drm_device *dev, void *data, struct drm_file *fi
 		return -EINVAL;
 	}
 
-	DRM_DEBUG("pid=%d\n", DRM_CURRENTPID);
+	DRM_DEBUG("pid=%d\n", task_pid_nr(current));
 
 	/* I would normal do this assignment in the declaration of fence,
 	 * but dev_priv may be NULL.
@@ -1077,7 +1077,7 @@ file_priv)
 		return -EINVAL;
 	}
 
-	DRM_DEBUG("pid=%d\n", DRM_CURRENTPID);
+	DRM_DEBUG("pid=%d\n", task_pid_nr(current));
 
 	mga_driver_fence_wait(dev, fence);
 	return 0;