drm: move to kref per-master structures.
This is step one towards having multiple masters sharing a drm
device in order to get fast-user-switching to work.
It splits out the information associated with the drm master
into a separate kref counted structure, and allocates this when
a master opens the device node. It also allows the current master
to abdicate (say while VT switched), and a new master to take over
the hardware.
It moves the Intel and radeon drivers to using the sarea from
within the new master structures.
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index afa8a12..dacdf3c 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -39,6 +39,7 @@
int i915_wait_ring(struct drm_device * dev, int n, const char *caller)
{
drm_i915_private_t *dev_priv = dev->dev_private;
+ struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
drm_i915_ring_buffer_t *ring = &(dev_priv->ring);
u32 acthd_reg = IS_I965G(dev) ? ACTHD_I965 : ACTHD;
u32 last_acthd = I915_READ(acthd_reg);
@@ -55,8 +56,8 @@
if (ring->space >= n)
return 0;
- if (dev_priv->sarea_priv)
- dev_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT;
+ if (master_priv->sarea_priv)
+ master_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT;
if (ring->head != last_head)
i = 0;
@@ -121,6 +122,7 @@
void i915_kernel_lost_context(struct drm_device * dev)
{
drm_i915_private_t *dev_priv = dev->dev_private;
+ struct drm_i915_master_private *master_priv;
drm_i915_ring_buffer_t *ring = &(dev_priv->ring);
ring->head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
@@ -129,8 +131,12 @@
if (ring->space < 0)
ring->space += ring->Size;
- if (ring->head == ring->tail && dev_priv->sarea_priv)
- dev_priv->sarea_priv->perf_boxes |= I915_BOX_RING_EMPTY;
+ if (!dev->primary->master)
+ return;
+
+ master_priv = dev->primary->master->driver_priv;
+ if (ring->head == ring->tail && master_priv->sarea_priv)
+ master_priv->sarea_priv->perf_boxes |= I915_BOX_RING_EMPTY;
}
static int i915_dma_cleanup(struct drm_device * dev)
@@ -154,25 +160,13 @@
if (I915_NEED_GFX_HWS(dev))
i915_free_hws(dev);
- dev_priv->sarea = NULL;
- dev_priv->sarea_priv = NULL;
-
return 0;
}
static int i915_initialize(struct drm_device * dev, drm_i915_init_t * init)
{
drm_i915_private_t *dev_priv = dev->dev_private;
-
- dev_priv->sarea = drm_getsarea(dev);
- if (!dev_priv->sarea) {
- DRM_ERROR("can not find sarea!\n");
- i915_dma_cleanup(dev);
- return -EINVAL;
- }
-
- dev_priv->sarea_priv = (drm_i915_sarea_t *)
- ((u8 *) dev_priv->sarea->handle + init->sarea_priv_offset);
+ struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
if (init->ring_size != 0) {
if (dev_priv->ring.ring_obj != NULL) {
@@ -207,7 +201,8 @@
dev_priv->back_offset = init->back_offset;
dev_priv->front_offset = init->front_offset;
dev_priv->current_page = 0;
- dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;
+ if (master_priv->sarea_priv)
+ master_priv->sarea_priv->pf_current_page = 0;
/* Allow hardware batchbuffers unless told otherwise.
*/
@@ -222,11 +217,6 @@
DRM_DEBUG("%s\n", __func__);
- if (!dev_priv->sarea) {
- DRM_ERROR("can not find sarea!\n");
- return -EINVAL;
- }
-
if (dev_priv->ring.map.handle == NULL) {
DRM_ERROR("can not ioremap virtual address for"
" ring buffer\n");
@@ -435,13 +425,14 @@
static void i915_emit_breadcrumb(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = dev->dev_private;
+ struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
RING_LOCALS;
dev_priv->counter++;
if (dev_priv->counter > 0x7FFFFFFFUL)
dev_priv->counter = 0;
- if (dev_priv->sarea_priv)
- dev_priv->sarea_priv->last_enqueue = dev_priv->counter;
+ if (master_priv->sarea_priv)
+ master_priv->sarea_priv->last_enqueue = dev_priv->counter;
BEGIN_LP_RING(4);
OUT_RING(MI_STORE_DWORD_INDEX);
@@ -537,15 +528,17 @@
static int i915_dispatch_flip(struct drm_device * dev)
{
drm_i915_private_t *dev_priv = dev->dev_private;
+ struct drm_i915_master_private *master_priv =
+ dev->primary->master->driver_priv;
RING_LOCALS;
- if (!dev_priv->sarea_priv)
+ if (!master_priv->sarea_priv)
return -EINVAL;
DRM_DEBUG("%s: page=%d pfCurrentPage=%d\n",
__func__,
dev_priv->current_page,
- dev_priv->sarea_priv->pf_current_page);
+ master_priv->sarea_priv->pf_current_page);
i915_kernel_lost_context(dev);
@@ -572,7 +565,7 @@
OUT_RING(0);
ADVANCE_LP_RING();
- dev_priv->sarea_priv->last_enqueue = dev_priv->counter++;
+ master_priv->sarea_priv->last_enqueue = dev_priv->counter++;
BEGIN_LP_RING(4);
OUT_RING(MI_STORE_DWORD_INDEX);
@@ -581,7 +574,7 @@
OUT_RING(0);
ADVANCE_LP_RING();
- dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;
+ master_priv->sarea_priv->pf_current_page = dev_priv->current_page;
return 0;
}
@@ -611,8 +604,9 @@
struct drm_file *file_priv)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
+ struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
- dev_priv->sarea_priv;
+ master_priv->sarea_priv;
drm_i915_batchbuffer_t *batch = data;
int ret;
@@ -644,8 +638,9 @@
struct drm_file *file_priv)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
+ struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
- dev_priv->sarea_priv;
+ master_priv->sarea_priv;
drm_i915_cmdbuffer_t *cmdbuf = data;
int ret;
@@ -802,6 +797,30 @@
return 0;
}
+int i915_master_create(struct drm_device *dev, struct drm_master *master)
+{
+ struct drm_i915_master_private *master_priv;
+
+ master_priv = drm_calloc(1, sizeof(*master_priv), DRM_MEM_DRIVER);
+ if (!master_priv)
+ return -ENOMEM;
+
+ master->driver_priv = master_priv;
+ return 0;
+}
+
+void i915_master_destroy(struct drm_device *dev, struct drm_master *master)
+{
+ struct drm_i915_master_private *master_priv = master->driver_priv;
+
+ if (!master_priv)
+ return;
+
+ drm_free(master_priv, sizeof(*master_priv), DRM_MEM_DRIVER);
+
+ master->driver_priv = NULL;
+}
+
int i915_driver_load(struct drm_device *dev, unsigned long flags)
{
struct drm_i915_private *dev_priv = dev->dev_private;