#include "i915_drm.h"
#include "i915_drv.h"
+#if DRM_DEBUG_CODE
+#define DRM_DEBUG_RELOCATION (drm_debug != 0)
+#else
+#define DRM_DEBUG_RELOCATION 0
+#endif
+
+enum i915_buf_idle {
+ i915_reloc_unchecked,
+ i915_reloc_idle,
+ i915_reloc_busy
+};
+
struct i915_relocatee_info {
struct drm_buffer_object *buf;
unsigned long offset;
unsigned page_offset;
struct drm_bo_kmap_obj kmap;
int is_iomem;
- int idle;
int dst;
+ int idle;
#ifdef DRM_KMAP_ATOMIC_PROT_PFN
unsigned long pfn;
pgprot_t pg_prot;
int presumed_offset_correct;
void __user *data;
int ret;
+ enum i915_buf_idle idle;
};
-
-static int i915_update_relocatee(struct i915_relocatee_info *relocatee,
- struct drm_i915_validate_buffer *buffers,
- unsigned int dst,
- unsigned long dst_offset)
+static void i915_emit_ring_reloc(struct drm_device *dev, uint32_t offset,
+ uint32_t value)
{
- int ret;
-
- if (unlikely(dst != relocatee->dst || NULL == relocatee->buf)) {
- i915_clear_relocatee(relocatee);
- relocatee->dst = dst;
- relocatee->buf = buffers[dst].buffer;
- preempt_enable();
- ret = mutex_lock_interruptible(&relocatee->buf->mutex);
- preempt_disable();
- if (unlikely(ret))
- return -EAGAIN;
-
- ret = drm_bo_wait(relocatee->buf, 0, 0, 0);
- if (unlikely(ret))
- return ret;
-
- mutex_unlock(&relocatee->buf->mutex);
- }
-
- if (unlikely(dst_offset > relocatee->buf->num_pages * PAGE_SIZE)) {
- DRM_ERROR("Relocation destination out of bounds.\n");
- return -EINVAL;
- }
- if (unlikely(!drm_bo_same_page(relocatee->page_offset, dst_offset) ||
- NULL == relocatee->data_page)) {
-#ifdef DRM_KMAP_ATOMIC_PROT_PFN
- if (NULL != relocatee->data_page) {
- kunmap_atomic(relocatee->data_page, KM_USER0);
- relocatee->data_page = NULL;
- }
- ret = drm_bo_pfn_prot(relocatee->buf, dst_offset,
- &relocatee->pfn,
- &relocatee->pg_prot);
- if (ret) {
- DRM_ERROR("Can't map relocation destination.\n");
- return -EINVAL;
- }
- relocatee->data_page =
- kmap_atomic_prot_pfn(relocatee->pfn, KM_USER0,
- relocatee->pg_prot);
-#else
- if (NULL != relocatee->data_page) {
- drm_bo_kunmap(&relocatee->kmap);
- relocatee->data_page = NULL;
- }
-
- ret = drm_bo_kmap(relocatee->buf, dst_offset >> PAGE_SHIFT,
- 1, &relocatee->kmap);
- if (ret) {
- DRM_ERROR("Can't map relocation destination.\n");
- return ret;
- }
-
- relocatee->data_page = drm_bmo_virtual(&relocatee->kmap,
- &relocatee->is_iomem);
-#endif
- relocatee->page_offset = dst_offset & PAGE_MASK;
- }
- return 0;
+ struct drm_i915_private *dev_priv =
+ (struct drm_i915_private *) dev->dev_private;
+
+ DRM_INFO("Ring reloc.\n");
+ RING_LOCALS;
+ i915_kernel_lost_context(dev);
+ BEGIN_LP_RING(6);
+ OUT_RING((0x02 << 29) | (0x40 << 22) | (0x3 << 20) | (0x3));
+ OUT_RING((0x3 << 24) | (0xF0 << 16) | (0x40));
+ OUT_RING((0x1 << 16) | (0x4));
+ OUT_RING(offset);
+ OUT_RING(value);
+ OUT_RING(0);
+ ADVANCE_LP_RING();
}
-
static void i915_dereference_buffers_locked(struct drm_i915_validate_buffer *buffers,
unsigned num_buffers)
{
return ret;
}
+
+static void i915_clear_relocatee(struct i915_relocatee_info *relocatee)
+{
+ if (relocatee->data_page) {
+#ifndef DRM_KMAP_ATOMIC_PROT_PFN
+ drm_bo_kunmap(&relocatee->kmap);
+#else
+ kunmap_atomic(relocatee->data_page, KM_USER0);
+#endif
+ relocatee->data_page = NULL;
+ }
+ relocatee->buf = NULL;
+ relocatee->dst = ~0;
+}
+
+
+static int i915_update_relocatee(struct i915_relocatee_info *relocatee,
+ struct drm_i915_validate_buffer *buffers,
+ unsigned int dst,
+ unsigned long dst_offset)
+{
+ int ret;
+
+ if (unlikely(dst != relocatee->dst || NULL == relocatee->buf)) {
+ i915_clear_relocatee(relocatee);
+ relocatee->dst = dst;
+ relocatee->buf = buffers[dst].buffer;
+ relocatee->idle = i915_reloc_idle; buffers[dst].idle;
+#if 0
+ if (relocatee->idle == i915_reloc_unchecked) {
+ preempt_enable();
+ ret = mutex_lock_interruptible(&relocatee->buf->mutex);
+ if (unlikely(ret))
+ return -EAGAIN;
+
+ ret = drm_bo_wait(relocatee->buf, 0, 0, 1);
+ relocatee->idle = (ret == 0) ? i915_reloc_idle : i915_reloc_busy;
+ mutex_unlock(&relocatee->buf->mutex);
+ preempt_disable();
+ buffers[dst].idle = relocatee->idle;
+ }
+#endif
+ }
+
+ if (relocatee->idle == i915_reloc_busy)
+ return 0;
+
+ if (unlikely(dst_offset > relocatee->buf->num_pages * PAGE_SIZE)) {
+ DRM_ERROR("Relocation destination out of bounds.\n");
+ return -EINVAL;
+ }
+ if (unlikely(!drm_bo_same_page(relocatee->page_offset, dst_offset) ||
+ NULL == relocatee->data_page)) {
+#ifdef DRM_KMAP_ATOMIC_PROT_PFN
+ if (NULL != relocatee->data_page) {
+ kunmap_atomic(relocatee->data_page, KM_USER0);
+ relocatee->data_page = NULL;
+ }
+ ret = drm_bo_pfn_prot(relocatee->buf, dst_offset,
+ &relocatee->pfn,
+ &relocatee->pg_prot);
+ if (ret) {
+ DRM_ERROR("Can't map relocation destination.\n");
+ return -EINVAL;
+ }
+ relocatee->data_page =
+ kmap_atomic_prot_pfn(relocatee->pfn, KM_USER0,
+ relocatee->pg_prot);
+#else
+ if (NULL != relocatee->data_page) {
+ drm_bo_kunmap(&relocatee->kmap);
+ relocatee->data_page = NULL;
+ }
+
+ ret = drm_bo_kmap(relocatee->buf, dst_offset >> PAGE_SHIFT,
+ 1, &relocatee->kmap);
+ if (ret) {
+ DRM_ERROR("Can't map relocation destination.\n");
+ return ret;
+ }
+
+ relocatee->data_page = drm_bmo_virtual(&relocatee->kmap,
+ &relocatee->is_iomem);
+#endif
+ relocatee->page_offset = dst_offset & PAGE_MASK;
+ }
+ return 0;
+}
+
+static int i915_apply_post_reloc(uint32_t reloc[],
+ struct drm_i915_validate_buffer *buffers,
+ uint32_t num_buffers,
+ struct i915_relocatee_info *relocatee)
+{
+ uint32_t reloc_buffer = reloc[2];
+ uint32_t dst_buffer = reloc[3];
+ uint32_t val;
+ uint32_t index;
+ int ret;
+
+ if (likely(buffers[reloc_buffer].presumed_offset_correct))
+ return 0;
+ if (unlikely(reloc_buffer >= num_buffers)) {
+ DRM_ERROR("Invalid reloc buffer index.\n");
+ return -EINVAL;
+ }
+ if (unlikely(dst_buffer >= num_buffers)) {
+ DRM_ERROR("Invalid dest buffer index.\n");
+ return -EINVAL;
+ }
+
+ ret = i915_update_relocatee(relocatee, buffers, dst_buffer,
+ reloc[0]);
+ if (unlikely(ret))
+ return ret;
+
+ val = buffers[reloc_buffer].buffer->offset;
+ index = (reloc[0] - relocatee->page_offset) >> 2;
+ val = val + reloc[1];
+
+ if (relocatee->idle == i915_reloc_busy) {
+ i915_emit_ring_reloc(relocatee->buf->dev,
+ relocatee->buf->offset + reloc[0],
+ val);
+ return 0;
+ }
+
+#ifdef DRM_KMAP_ATOMIC_PROT_PFN
+ relocatee->data_page[index] = val;
+#else
+ if (likely(relocatee->is_iomem))
+ iowrite32(val, relocatee->data_page + index);
+ else
+ relocatee->data_page[index] = val;
+#endif
+
+ return 0;
+}
+
+static int i915_post_relocs(struct drm_file *file_priv,
+ uint32_t __user *new_reloc_ptr,
+ struct drm_i915_validate_buffer *buffers,
+ unsigned int num_buffers)
+{
+ uint32_t *reloc;
+ uint32_t reloc_stride = I915_RELOC0_STRIDE * sizeof(uint32_t);
+ uint32_t header_size = I915_RELOC_HEADER * sizeof(uint32_t);
+ struct i915_relocatee_info relocatee;
+ uint32_t reloc_type;
+ uint32_t num_relocs;
+ uint32_t count;
+ int ret = 0;
+ int i;
+ int short_circuit = 1;
+ uint32_t __user *reloc_ptr;
+ uint64_t new_reloc_data;
+ uint32_t reloc_buf_size;
+ uint32_t *reloc_buf;
+
+ for (i=0; i<num_buffers; ++i) {
+ if (unlikely(!buffers[i].presumed_offset_correct)) {
+ short_circuit = 0;
+ break;
+ }
+ }
+
+ if (likely(short_circuit))
+ return 0;
+
+ memset(&relocatee, 0, sizeof(relocatee));
+
+ while(new_reloc_ptr) {
+ reloc_ptr = new_reloc_ptr;
+
+ ret = get_user(num_relocs, reloc_ptr);
+ if (unlikely(ret))
+ goto out;
+ if (unlikely(!access_ok(VERIFY_READ, reloc_ptr,
+ header_size +
+ num_relocs * reloc_stride)))
+ return -EFAULT;
+
+ ret = __get_user(reloc_type, reloc_ptr + 1);
+ if (unlikely(ret))
+ goto out;
+
+ if (unlikely(reloc_type != 1)) {
+ DRM_ERROR("Unsupported relocation type requested.\n");
+ ret = -EINVAL;
+ goto out;
+ }
+
+ ret = __get_user(new_reloc_data, reloc_ptr + 2);
+ new_reloc_ptr = (uint32_t __user *) (unsigned long)
+ new_reloc_data;
+
+ reloc_ptr += I915_RELOC_HEADER;
+
+ if (num_relocs == 0)
+ goto out;
+
+ reloc_buf_size = (num_relocs * I915_RELOC0_STRIDE) * sizeof(uint32_t);
+ reloc_buf = kmalloc(reloc_buf_size, GFP_KERNEL);
+ if (!reloc_buf) {
+ DRM_ERROR("Out of memory for reloc buffer\n");
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ if (__copy_from_user(reloc_buf, reloc_ptr, reloc_buf_size)) {
+ ret = -EFAULT;
+ goto out;
+ }
+ reloc = reloc_buf;
+ preempt_disable();
+ for (count = 0; count < num_relocs; ++count) {
+ ret = i915_apply_post_reloc(reloc, buffers,
+ num_buffers, &relocatee);
+ if (unlikely(ret)) {
+ preempt_enable();
+ goto out;
+ }
+ reloc += I915_RELOC0_STRIDE;
+ }
+ preempt_enable();
+
+ if (reloc_buf) {
+ kfree(reloc_buf);
+ reloc_buf = NULL;
+ }
+ i915_clear_relocatee(&relocatee);
+ }
+
+out:
+ if (reloc_buf) {
+ kfree(reloc_buf);
+ reloc_buf = NULL;
+ }
+
+ return ret;
+}
+
static int i915_check_presumed(struct drm_i915_op_arg *arg,
struct drm_buffer_object *bo,
uint32_t __user *data,
int i915_validate_buffer_list(struct drm_file *file_priv,
unsigned int fence_class, uint64_t data,
struct drm_i915_validate_buffer *buffers,
- uint32_t *num_buffers)
+ uint32_t *num_buffers,
+ uint32_t __user **post_relocs)
{
struct drm_i915_op_arg arg;
struct drm_bo_op_req *req = &arg.d.req;
uint32_t buf_handle;
uint32_t __user *reloc_user_ptr;
struct drm_i915_validate_buffer *item = buffers;
+ *post_relocs = NULL;
do {
if (buf_count >= *num_buffers) {
item->buffer = NULL;
item->presumed_offset_correct = 0;
- buffers[buf_count].buffer = NULL;
-
if (copy_from_user(&arg, (void __user *)(unsigned long)data, sizeof(arg))) {
ret = -EFAULT;
goto out_err;
buf_handle = req->bo_req.handle;
reloc_user_ptr = (uint32_t *)(unsigned long)arg.reloc_ptr;
- if (reloc_user_ptr) {
+ /*
+ * Switch mode to post-validation relocations?
+ */
+
+ if (unlikely((buf_count == 0) && (*post_relocs == NULL) &&
+ (reloc_user_ptr != NULL))) {
+ uint32_t reloc_type;
+
+ ret = get_user(reloc_type, reloc_user_ptr+1);
+ if (ret)
+ goto out_err;
+
+ if (reloc_type == 1)
+ *post_relocs = reloc_user_ptr;
+
+ }
+
+ if ((*post_relocs == NULL) && (reloc_user_ptr != NULL)) {
ret = i915_exec_reloc(file_priv, buf_handle, reloc_user_ptr, buffers, buf_count);
if (ret)
goto out_err;
req->bo_req.fence_class, 0,
&item->rep,
&item->buffer);
-
if (ret) {
DRM_ERROR("error on handle validate %d\n", ret);
goto out_err;
}
-static int i915_execbuffer(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
+int i915_execbuffer(struct drm_device *dev, void *data,
+ struct drm_file *file_priv)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
struct drm_fence_arg *fence_arg = &exec_buf->fence_arg;
int num_buffers;
int ret;
+ uint32_t __user *post_relocs;
struct drm_i915_validate_buffer *buffers;
if (!dev_priv->allow_batchbuffer) {
return -EINVAL;
}
-
if (batch->num_cliprects && DRM_VERIFYAREA_READ(batch->cliprects,
batch->num_cliprects *
sizeof(struct drm_clip_rect)))
if (exec_buf->num_buffers > dev_priv->max_validate_buffers)
return -EINVAL;
-
ret = drm_bo_read_lock(&dev->bm.bm_lock);
if (ret)
return ret;
/* validate buffer list + fixup relocations */
ret = i915_validate_buffer_list(file_priv, 0, exec_buf->ops_list,
- buffers, &num_buffers);
+ buffers, &num_buffers, &post_relocs);
if (ret)
goto out_err0;
+ if (post_relocs) {
+ ret = i915_post_relocs(file_priv, post_relocs,
+ buffers, num_buffers);
+ if (ret)
+ goto out_err0;
+ }
+
/* make sure all previous memory operations have passed */
DRM_MEMORYBARRIER();
- drm_agp_chipset_flush(dev);
- /* submit buffer */
- batch->start = buffers[num_buffers-1].buffer->offset;
+ if (!post_relocs) {
+ drm_agp_chipset_flush(dev);
+ batch->start = buffers[num_buffers-1].buffer->offset;
+ } else {
+ batch->start += buffers[0].buffer->offset;
+ }
+#if 1
+ // (void) i915_emit_mi_flush(dev, MI_NO_WRITE_FLUSH | MI_READ_FLUSH | MI_EXE_FLUSH);
DRM_DEBUG("i915 exec batchbuffer, start %x used %d cliprects %d\n",
batch->start, batch->used, batch->num_cliprects);
ret = i915_dispatch_batchbuffer(dev, batch);
if (ret)
goto out_err0;
-
+#endif
if (sarea_priv)
sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
-
i915_fence_or_sync(file_priv, fence_arg->flags, fence_arg, NULL);
out_err0:
drm_bo_read_unlock(&dev->bm.bm_lock);
return ret;
}
-#endif
return 0;
}
-static int i915_dispatch_batchbuffer(struct drm_device * dev,
- drm_i915_batchbuffer_t * batch)
+int i915_dispatch_batchbuffer(struct drm_device * dev,
+ drm_i915_batchbuffer_t * batch)
{
drm_i915_private_t *dev_priv = dev->dev_private;
struct drm_clip_rect __user *boxes = batch->cliprects;
#endif
}
-static int i915_quiescent(struct drm_device *dev)
+int i915_quiescent(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = dev->dev_private;
#define DRM_DEBUG_RELOCATION 0
#endif
-#ifdef I915_HAVE_BUFFER
-
-struct i915_relocatee_info {
- struct drm_buffer_object *buf;
- unsigned long offset;
- u32 *data_page;
- unsigned page_offset;
- struct drm_bo_kmap_obj kmap;
- int is_iomem;
-};
-
-struct drm_i915_validate_buffer {
- struct drm_buffer_object *buffer;
- struct drm_bo_info_rep rep;
- int presumed_offset_correct;
- void __user *data;
- int ret;
-};
-
-static void i915_dereference_buffers_locked(struct drm_i915_validate_buffer *buffers,
- unsigned num_buffers)
-{
- while (num_buffers--)
- drm_bo_usage_deref_locked(&buffers[num_buffers].buffer);
-}
-
-int i915_apply_reloc(struct drm_file *file_priv, int num_buffers,
- struct drm_i915_validate_buffer *buffers,
- struct i915_relocatee_info *relocatee,
- uint32_t *reloc)
-{
- unsigned index;
- unsigned long new_cmd_offset;
- u32 val;
- int ret, i;
- int buf_index = -1;
-
- /*
- * FIXME: O(relocs * buffers) complexity.
- */
-
- for (i = 0; i <= num_buffers; i++)
- if (buffers[i].buffer)
- if (reloc[2] == buffers[i].buffer->base.hash.key)
- buf_index = i;
-
- if (buf_index == -1) {
- DRM_ERROR("Illegal relocation buffer %08X\n", reloc[2]);
- return -EINVAL;
- }
-
- /*
- * Short-circuit relocations that were correctly
- * guessed by the client
- */
- if (buffers[buf_index].presumed_offset_correct && !DRM_DEBUG_RELOCATION)
- return 0;
-
- new_cmd_offset = reloc[0];
- if (!relocatee->data_page ||
- !drm_bo_same_page(relocatee->offset, new_cmd_offset)) {
- drm_bo_kunmap(&relocatee->kmap);
- relocatee->data_page = NULL;
- relocatee->offset = new_cmd_offset;
-
- /*
- * Note on buffer idle:
- * Since we're applying relocations, this part of the
- * buffer is obviously not used by the GPU and we don't
- * need to wait for buffer idle. This is an important
- * consideration for user-space buffer pools.
- */
-
- ret = drm_bo_kmap(relocatee->buf, new_cmd_offset >> PAGE_SHIFT,
- 1, &relocatee->kmap);
- if (ret) {
- DRM_ERROR("Could not map command buffer to apply relocs\n %08lx", new_cmd_offset);
- return ret;
- }
- relocatee->data_page = drm_bmo_virtual(&relocatee->kmap,
- &relocatee->is_iomem);
- relocatee->page_offset = (relocatee->offset & PAGE_MASK);
- }
-
- val = buffers[buf_index].buffer->offset;
- index = (reloc[0] - relocatee->page_offset) >> 2;
-
- /* add in validate */
- val = val + reloc[1];
-
- if (DRM_DEBUG_RELOCATION) {
- if (buffers[buf_index].presumed_offset_correct &&
- relocatee->data_page[index] != val) {
- DRM_DEBUG ("Relocation mismatch source %d target %d buffer %d user %08x kernel %08x\n",
- reloc[0], reloc[1], buf_index, relocatee->data_page[index], val);
- }
- }
-
- if (relocatee->is_iomem)
- iowrite32(val, relocatee->data_page + index);
- else
- relocatee->data_page[index] = val;
- return 0;
-}
-
-int i915_process_relocs(struct drm_file *file_priv,
- uint32_t buf_handle,
- uint32_t __user **reloc_user_ptr,
- struct i915_relocatee_info *relocatee,
- struct drm_i915_validate_buffer *buffers,
- uint32_t num_buffers)
-{
- int ret, reloc_stride;
- uint32_t cur_offset;
- uint32_t reloc_count;
- uint32_t reloc_type;
- uint32_t reloc_buf_size;
- uint32_t *reloc_buf = NULL;
- int i;
-
- /* do a copy from user from the user ptr */
- ret = get_user(reloc_count, *reloc_user_ptr);
- if (ret) {
- DRM_ERROR("Could not map relocation buffer.\n");
- goto out;
- }
-
- ret = get_user(reloc_type, (*reloc_user_ptr)+1);
- if (ret) {
- DRM_ERROR("Could not map relocation buffer.\n");
- goto out;
- }
-
- if (reloc_type != 0) {
- DRM_ERROR("Unsupported relocation type requested\n");
- ret = -EINVAL;
- goto out;
- }
-
- reloc_buf_size = (I915_RELOC_HEADER + (reloc_count * I915_RELOC0_STRIDE)) * sizeof(uint32_t);
- reloc_buf = kmalloc(reloc_buf_size, GFP_KERNEL);
- if (!reloc_buf) {
- DRM_ERROR("Out of memory for reloc buffer\n");
- ret = -ENOMEM;
- goto out;
- }
-
- if (copy_from_user(reloc_buf, *reloc_user_ptr, reloc_buf_size)) {
- ret = -EFAULT;
- goto out;
- }
-
- /* get next relocate buffer handle */
- *reloc_user_ptr = (uint32_t *)*(unsigned long *)&reloc_buf[2];
-
- reloc_stride = I915_RELOC0_STRIDE * sizeof(uint32_t); /* may be different for other types of relocs */
-
- DRM_DEBUG("num relocs is %d, next is %p\n", reloc_count, *reloc_user_ptr);
-
- for (i = 0; i < reloc_count; i++) {
- cur_offset = I915_RELOC_HEADER + (i * I915_RELOC0_STRIDE);
-
- ret = i915_apply_reloc(file_priv, num_buffers, buffers,
- relocatee, reloc_buf + cur_offset);
- if (ret)
- goto out;
- }
-
-out:
- if (reloc_buf)
- kfree(reloc_buf);
-
- if (relocatee->data_page) {
- drm_bo_kunmap(&relocatee->kmap);
- relocatee->data_page = NULL;
- }
-
- return ret;
-}
-
-static int i915_exec_reloc(struct drm_file *file_priv, drm_handle_t buf_handle,
- uint32_t __user *reloc_user_ptr,
- struct drm_i915_validate_buffer *buffers,
- uint32_t buf_count)
-{
- struct drm_device *dev = file_priv->head->dev;
- struct i915_relocatee_info relocatee;
- int ret = 0;
- int b;
-
- /*
- * Short circuit relocations when all previous
- * buffers offsets were correctly guessed by
- * the client
- */
- if (!DRM_DEBUG_RELOCATION) {
- for (b = 0; b < buf_count; b++)
- if (!buffers[b].presumed_offset_correct)
- break;
-
- if (b == buf_count)
- return 0;
- }
-
- memset(&relocatee, 0, sizeof(relocatee));
-
- mutex_lock(&dev->struct_mutex);
- relocatee.buf = drm_lookup_buffer_object(file_priv, buf_handle, 1);
- mutex_unlock(&dev->struct_mutex);
- if (!relocatee.buf) {
- DRM_DEBUG("relocatee buffer invalid %08x\n", buf_handle);
- ret = -EINVAL;
- goto out_err;
- }
-
- mutex_lock (&relocatee.buf->mutex);
- while (reloc_user_ptr) {
- ret = i915_process_relocs(file_priv, buf_handle, &reloc_user_ptr, &relocatee, buffers, buf_count);
- if (ret) {
- DRM_ERROR("process relocs failed\n");
- goto out_err1;
- }
- }
-
-out_err1:
- mutex_unlock (&relocatee.buf->mutex);
- drm_bo_usage_deref_unlocked(&relocatee.buf);
-out_err:
- return ret;
-}
-
-static int i915_check_presumed(struct drm_i915_op_arg *arg,
- struct drm_buffer_object *bo,
- uint32_t __user *data,
- int *presumed_ok)
-{
- struct drm_bo_op_req *req = &arg->d.req;
- uint32_t hint_offset;
- uint32_t hint = req->bo_req.hint;
-
- *presumed_ok = 0;
-
- if (!(hint & DRM_BO_HINT_PRESUMED_OFFSET))
- return 0;
- if (bo->offset == req->bo_req.presumed_offset) {
- *presumed_ok = 1;
- return 0;
- }
-
- /*
- * We need to turn off the HINT_PRESUMED_OFFSET for this buffer in
- * the user-space IOCTL argument list, since the buffer has moved,
- * we're about to apply relocations and we might subsequently
- * hit an -EAGAIN. In that case the argument list will be reused by
- * user-space, but the presumed offset is no longer valid.
- *
- * Needless to say, this is a bit ugly.
- */
-
- hint_offset = (uint32_t *)&req->bo_req.hint - (uint32_t *)arg;
- hint &= ~DRM_BO_HINT_PRESUMED_OFFSET;
- return __put_user(hint, data + hint_offset);
-}
-
-
-/*
- * Validate, add fence and relocate a block of bos from a userspace list
- */
-int i915_validate_buffer_list(struct drm_file *file_priv,
- unsigned int fence_class, uint64_t data,
- struct drm_i915_validate_buffer *buffers,
- uint32_t *num_buffers)
-{
- struct drm_i915_op_arg arg;
- struct drm_bo_op_req *req = &arg.d.req;
- int ret = 0;
- unsigned buf_count = 0;
- uint32_t buf_handle;
- uint32_t __user *reloc_user_ptr;
- struct drm_i915_validate_buffer *item = buffers;
-
- do {
- if (buf_count >= *num_buffers) {
- DRM_ERROR("Buffer count exceeded %d\n.", *num_buffers);
- ret = -EINVAL;
- goto out_err;
- }
- item = buffers + buf_count;
- item->buffer = NULL;
- item->presumed_offset_correct = 0;
-
- buffers[buf_count].buffer = NULL;
-
- if (copy_from_user(&arg, (void __user *)(unsigned long)data, sizeof(arg))) {
- ret = -EFAULT;
- goto out_err;
- }
-
- ret = 0;
- if (req->op != drm_bo_validate) {
- DRM_ERROR
- ("Buffer object operation wasn't \"validate\".\n");
- ret = -EINVAL;
- goto out_err;
- }
- item->ret = 0;
- item->data = (void __user *) (unsigned long) data;
-
- buf_handle = req->bo_req.handle;
- reloc_user_ptr = (uint32_t *)(unsigned long)arg.reloc_ptr;
-
- if (reloc_user_ptr) {
- ret = i915_exec_reloc(file_priv, buf_handle, reloc_user_ptr, buffers, buf_count);
- if (ret)
- goto out_err;
- DRM_MEMORYBARRIER();
- }
-
- ret = drm_bo_handle_validate(file_priv, req->bo_req.handle,
- req->bo_req.flags, req->bo_req.mask,
- req->bo_req.hint,
- req->bo_req.fence_class, 0,
- &item->rep,
- &item->buffer);
-
- if (ret) {
- DRM_ERROR("error on handle validate %d\n", ret);
- goto out_err;
- }
-
- buf_count++;
-
- ret = i915_check_presumed(&arg, item->buffer,
- (uint32_t __user *)
- (unsigned long) data,
- &item->presumed_offset_correct);
- if (ret)
- goto out_err;
-
- data = arg.next;
- } while (data != 0);
-out_err:
- *num_buffers = buf_count;
- item->ret = (ret != -EAGAIN) ? ret : 0;
- return ret;
-}
-
-
-/*
- * Remove all buffers from the unfenced list.
- * If the execbuffer operation was aborted, for example due to a signal,
- * this also make sure that buffers retain their original state and
- * fence pointers.
- * Copy back buffer information to user-space unless we were interrupted
- * by a signal. In which case the IOCTL must be rerun.
- */
-
-static int i915_handle_copyback(struct drm_device *dev,
- struct drm_i915_validate_buffer *buffers,
- unsigned int num_buffers, int ret)
-{
- int err = ret;
- int i;
- struct drm_i915_op_arg arg;
-
- if (ret)
- drm_putback_buffer_objects(dev);
-
- if (ret != -EAGAIN) {
- for (i = 0; i < num_buffers; ++i) {
- arg.handled = 1;
- arg.d.rep.ret = buffers->ret;
- arg.d.rep.bo_info = buffers->rep;
- if (__copy_to_user(buffers->data, &arg, sizeof(arg)))
- err = -EFAULT;
- buffers++;
- }
- }
-
- return err;
-}
-
-/*
- * Create a fence object, and if that fails, pretend that everything is
- * OK and just idle the GPU.
- */
-
-void i915_fence_or_sync(struct drm_file *file_priv,
- uint32_t fence_flags,
- struct drm_fence_arg *fence_arg,
- struct drm_fence_object **fence_p)
-{
- struct drm_device *dev = file_priv->head->dev;
- int ret;
- struct drm_fence_object *fence;
-
- ret = drm_fence_buffer_objects(dev, NULL, fence_flags,
- NULL, &fence);
-
- if (ret) {
-
- /*
- * Fence creation failed.
- * Fall back to synchronous operation and idle the engine.
- */
-
- (void) i915_emit_mi_flush(dev, MI_READ_FLUSH);
- (void) i915_quiescent(dev);
-
- if (!(fence_flags & DRM_FENCE_FLAG_NO_USER)) {
-
- /*
- * Communicate to user-space that
- * fence creation has failed and that
- * the engine is idle.
- */
-
- fence_arg->handle = ~0;
- fence_arg->error = ret;
- }
-
- drm_putback_buffer_objects(dev);
- if (fence_p)
- *fence_p = NULL;
- return;
- }
-
- if (!(fence_flags & DRM_FENCE_FLAG_NO_USER)) {
-
- ret = drm_fence_add_user_object(file_priv, fence,
- fence_flags &
- DRM_FENCE_FLAG_SHAREABLE);
- if (!ret)
- drm_fence_fill_arg(fence, fence_arg);
- else {
- /*
- * Fence user object creation failed.
- * We must idle the engine here as well, as user-
- * space expects a fence object to wait on. Since we
- * have a fence object we wait for it to signal
- * to indicate engine "sufficiently" idle.
- */
-
- (void) drm_fence_object_wait(fence, 0, 1,
- fence->type);
- drm_fence_usage_deref_unlocked(&fence);
- fence_arg->handle = ~0;
- fence_arg->error = ret;
- }
- }
-
- if (fence_p)
- *fence_p = fence;
- else if (fence)
- drm_fence_usage_deref_unlocked(&fence);
-}
-
-
-static int i915_execbuffer(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
-{
- drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
- drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
- dev_priv->sarea_priv;
- struct drm_i915_execbuffer *exec_buf = data;
- struct drm_i915_batchbuffer *batch = &exec_buf->batch;
- struct drm_fence_arg *fence_arg = &exec_buf->fence_arg;
- int num_buffers;
- int ret;
- struct drm_i915_validate_buffer *buffers;
-
- if (!dev_priv->allow_batchbuffer) {
- DRM_ERROR("Batchbuffer ioctl disabled\n");
- return -EINVAL;
- }
-
-
- if (batch->num_cliprects && DRM_VERIFYAREA_READ(batch->cliprects,
- batch->num_cliprects *
- sizeof(struct drm_clip_rect)))
- return -EFAULT;
-
- if (exec_buf->num_buffers > dev_priv->max_validate_buffers)
- return -EINVAL;
-
-
- ret = drm_bo_read_lock(&dev->bm.bm_lock);
- if (ret)
- return ret;
-
- /*
- * The cmdbuf_mutex makes sure the validate-submit-fence
- * operation is atomic.
- */
-
- ret = mutex_lock_interruptible(&dev_priv->cmdbuf_mutex);
- if (ret) {
- drm_bo_read_unlock(&dev->bm.bm_lock);
- return -EAGAIN;
- }
-
- num_buffers = exec_buf->num_buffers;
-
- buffers = drm_calloc(num_buffers, sizeof(struct drm_i915_validate_buffer), DRM_MEM_DRIVER);
- if (!buffers) {
- drm_bo_read_unlock(&dev->bm.bm_lock);
- mutex_unlock(&dev_priv->cmdbuf_mutex);
- return -ENOMEM;
- }
-
- /* validate buffer list + fixup relocations */
- ret = i915_validate_buffer_list(file_priv, 0, exec_buf->ops_list,
- buffers, &num_buffers);
- if (ret)
- goto out_err0;
-
- /* make sure all previous memory operations have passed */
- DRM_MEMORYBARRIER();
- drm_agp_chipset_flush(dev);
-
- /* submit buffer */
- batch->start = buffers[num_buffers-1].buffer->offset;
-
- DRM_DEBUG("i915 exec batchbuffer, start %x used %d cliprects %d\n",
- batch->start, batch->used, batch->num_cliprects);
-
- ret = i915_dispatch_batchbuffer(dev, batch);
- if (ret)
- goto out_err0;
-
- if (sarea_priv)
- sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
-
- i915_fence_or_sync(file_priv, fence_arg->flags, fence_arg, NULL);
-
-out_err0:
-
- /* handle errors */
- ret = i915_handle_copyback(dev, buffers, num_buffers, ret);
- mutex_lock(&dev->struct_mutex);
- i915_dereference_buffers_locked(buffers, num_buffers);
- mutex_unlock(&dev->struct_mutex);
-
- drm_free(buffers, (exec_buf->num_buffers * sizeof(struct drm_buffer_object *)), DRM_MEM_DRIVER);
-
- mutex_unlock(&dev_priv->cmdbuf_mutex);
- drm_bo_read_unlock(&dev->bm.bm_lock);
- return ret;
-}
-#endif
static int i915_do_cleanup_pageflip(struct drm_device * dev)
{
projects / platform / upstream / libdrm.git / commitdiff