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vmwgfx: Optimize the command submission resource list 

Use a list for resources referenced during command submission, instead of
an array.
As long as we don't implement parallell command submission this works fine
and simplifies things a bit.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Jakob Bornecrantz <jakob@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Thomas Hellstrom 2011-10-04 20:13:31 +02:00 committed by Dave Airlie
parent e2fa3a7683
commit f18c8840be
3 changed files with 26 additions and 30 deletions
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5
drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
View File

@ -81,7 +81,7 @@ struct vmw_resource {
bool avail;
void (*hw_destroy) (struct vmw_resource *res);
void (*res_free) (struct vmw_resource *res);
bool on_validate_list;
struct list_head validate_head;
struct list_head query_head; /* Protected by the cmdbuf mutex */
/* TODO is a generic snooper needed? */
#if 0
@ -155,8 +155,7 @@ struct vmw_sw_context{
uint32_t cur_val_buf;
uint32_t *cmd_bounce;
uint32_t cmd_bounce_size;
struct vmw_resource *resources[VMWGFX_MAX_VALIDATIONS];
uint32_t num_ref_resources;
struct list_head resource_list;
uint32_t fence_flags;
struct list_head query_list;
struct ttm_buffer_object *cur_query_bo;

50
drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
View File

@ -44,27 +44,16 @@ static int vmw_cmd_ok(struct vmw_private *dev_priv,
return 0;
}
static int vmw_resource_to_validate_list(struct vmw_sw_context *sw_context,
struct vmw_resource **p_res)
static void vmw_resource_to_validate_list(struct vmw_sw_context *sw_context,
struct vmw_resource **p_res)
{
int ret = 0;
struct vmw_resource *res = *p_res;
if (!res->on_validate_list) {
if (sw_context->num_ref_resources >= VMWGFX_MAX_VALIDATIONS) {
DRM_ERROR("Too many resources referenced in "
"command stream.\n");
ret = -ENOMEM;
goto out;
}
sw_context->resources[sw_context->num_ref_resources++] = res;
res->on_validate_list = true;
return 0;
}
out:
vmw_resource_unreference(p_res);
return ret;
if (list_empty(&res->validate_head)) {
list_add_tail(&res->validate_head, &sw_context->resource_list);
*p_res = NULL;
} else
vmw_resource_unreference(p_res);
}
/**
@ -142,7 +131,9 @@ static int vmw_cmd_cid_check(struct vmw_private *dev_priv,
sw_context->last_cid = cmd->cid;
sw_context->cid_valid = true;
sw_context->cur_ctx = ctx;
return vmw_resource_to_validate_list(sw_context, &ctx);
vmw_resource_to_validate_list(sw_context, &ctx);
return 0;
}
static int vmw_cmd_sid_check(struct vmw_private *dev_priv,
@ -179,7 +170,9 @@ static int vmw_cmd_sid_check(struct vmw_private *dev_priv,
*sid = sw_context->sid_translation;
res = &srf->res;
return vmw_resource_to_validate_list(sw_context, &res);
vmw_resource_to_validate_list(sw_context, &res);
return 0;
}
@ -388,7 +381,7 @@ static void vmw_query_bo_switch_commit(struct vmw_private *dev_priv,
query_head) {
list_del_init(&ctx->query_head);
BUG_ON(!ctx->on_validate_list);
BUG_ON(list_empty(&ctx->validate_head));
ret = vmw_fifo_emit_dummy_query(dev_priv, ctx->id);
@ -582,7 +575,9 @@ static int vmw_cmd_dma(struct vmw_private *dev_priv,
vmw_dmabuf_unreference(&vmw_bo);
res = &srf->res;
return vmw_resource_to_validate_list(sw_context, &res);
vmw_resource_to_validate_list(sw_context, &res);
return 0;
out_no_reloc:
vmw_dmabuf_unreference(&vmw_bo);
@ -870,7 +865,7 @@ static void vmw_apply_relocations(struct vmw_sw_context *sw_context)
static void vmw_clear_validations(struct vmw_sw_context *sw_context)
{
struct ttm_validate_buffer *entry, *next;
uint32_t i = sw_context->num_ref_resources;
struct vmw_resource *res, *res_next;
/*
* Drop references to DMA buffers held during command submission.
@ -887,9 +882,10 @@ static void vmw_clear_validations(struct vmw_sw_context *sw_context)
/*
* Drop references to resources held during command submission.
*/
while (i-- > 0) {
sw_context->resources[i]->on_validate_list = false;
vmw_resource_unreference(&sw_context->resources[i]);
list_for_each_entry_safe(res, res_next, &sw_context->resource_list,
validate_head) {
list_del_init(&res->validate_head);
vmw_resource_unreference(&res);
}
}
@ -1066,9 +1062,9 @@ int vmw_execbuf_process(struct drm_file *file_priv,
sw_context->sid_valid = false;
sw_context->cur_reloc = 0;
sw_context->cur_val_buf = 0;
sw_context->num_ref_resources = 0;
sw_context->fence_flags = 0;
INIT_LIST_HEAD(&sw_context->query_list);
INIT_LIST_HEAD(&sw_context->resource_list);
sw_context->cur_query_bo = dev_priv->pinned_bo;
sw_context->cur_query_cid = dev_priv->query_cid;
sw_context->query_cid_valid = (dev_priv->pinned_bo != NULL);

1
drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
View File

@ -127,6 +127,7 @@ static int vmw_resource_init(struct vmw_private *dev_priv,
res->avail = false;
res->dev_priv = dev_priv;
INIT_LIST_HEAD(&res->query_head);
INIT_LIST_HEAD(&res->validate_head);
do {
if (unlikely(idr_pre_get(idr, GFP_KERNEL) == 0))
return -ENOMEM;