drm/radeon: map registers at load time

Now that the radeon driver has suspend/resume functions, it needs to map its
registers at load time or it will likely crash if a suspend operation occurs
before the driver has been initialized.

This patch moves the register mapping code from firstopen to load and makes
the mapping into a _DRM_DRIVER one so that the core won't remove it at
lastclose time.

Fixes (at least partially) kernel bz #11891.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Dave Airlie <airlied@linux.ie>

diff --git a/drivers/gpu/drm/radeon/radeon_cp.c b/drivers/gpu/drm/radeon/radeon_cp.c
index 0738948..abdc1ae 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_cp.c
+++ b/drivers/gpu/drm/radeon/radeon_cp.c
@@ -1751,6 +1751,12 @@ int radeon_driver_load(struct drm_device *dev, unsigned long flags)
        else
                dev_priv->flags |= RADEON_IS_PCI;
 
+       ret = drm_addmap(dev, drm_get_resource_start(dev, 2),
+                        drm_get_resource_len(dev, 2), _DRM_REGISTERS,
+                        _DRM_READ_ONLY | _DRM_DRIVER, &dev_priv->mmio);
+       if (ret != 0)
+               return ret;
+
        DRM_DEBUG("%s card detected\n",
                  ((dev_priv->flags & RADEON_IS_AGP) ? "AGP" : (((dev_priv->flags & RADEON_IS_PCIE) ? "PCIE" : "PCI"))));
        return ret;
@@ -1767,12 +1773,6 @@ int radeon_driver_firstopen(struct drm_device *dev)
 
        dev_priv->gart_info.table_size = RADEON_PCIGART_TABLE_SIZE;
 
-       ret = drm_addmap(dev, drm_get_resource_start(dev, 2),
-                        drm_get_resource_len(dev, 2), _DRM_REGISTERS,
-                        _DRM_READ_ONLY, &dev_priv->mmio);
-       if (ret != 0)
-               return ret;
-
        dev_priv->fb_aper_offset = drm_get_resource_start(dev, 0);
        ret = drm_addmap(dev, dev_priv->fb_aper_offset,
                         drm_get_resource_len(dev, 0), _DRM_FRAME_BUFFER,
@@ -1788,6 +1788,9 @@ int radeon_driver_unload(struct drm_device *dev)
        drm_radeon_private_t *dev_priv = dev->dev_private;
 
        DRM_DEBUG("\n");
+
+       drm_rmmap(dev, dev_priv->mmio);
+
        drm_free(dev_priv, sizeof(*dev_priv), DRM_MEM_DRIVER);
 
        dev->dev_private = NULL;

diff --git a/drivers/gpu/drm/radeon/radeon_drv.h b/drivers/gpu/drm/radeon/radeon_drv.h
index 02f5575..7a18378 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_drv.h
+++ b/drivers/gpu/drm/radeon/radeon_drv.h
@@ -287,7 +287,6 @@ typedef struct drm_radeon_private {
        unsigned long gart_textures_offset;
 
        drm_local_map_t *sarea;
-       drm_local_map_t *mmio;
        drm_local_map_t *cp_ring;
        drm_local_map_t *ring_rptr;
        drm_local_map_t *gart_textures;
@@ -318,6 +317,7 @@ typedef struct drm_radeon_private {
 
        int num_gb_pipes;
        int track_flush;
+       drm_local_map_t *mmio;
 } drm_radeon_private_t;
 
 typedef struct drm_radeon_buf_priv {