return 0;
}
-static bool validate_cmds_sorted(struct intel_ring_buffer *ring)
+static bool validate_cmds_sorted(struct intel_ring_buffer *ring,
+ const struct drm_i915_cmd_table *cmd_tables,
+ int cmd_table_count)
{
int i;
bool ret = true;
- if (!ring->cmd_tables || ring->cmd_table_count == 0)
+ if (!cmd_tables || cmd_table_count == 0)
return true;
- for (i = 0; i < ring->cmd_table_count; i++) {
- const struct drm_i915_cmd_table *table = &ring->cmd_tables[i];
+ for (i = 0; i < cmd_table_count; i++) {
+ const struct drm_i915_cmd_table *table = &cmd_tables[i];
u32 previous = 0;
int j;
ring->master_reg_count);
}
+struct cmd_node {
+ const struct drm_i915_cmd_descriptor *desc;
+ struct hlist_node node;
+};
+
+/*
+ * Different command ranges have different numbers of bits for the opcode. For
+ * example, MI commands use bits 31:23 while 3D commands use bits 31:16. The
+ * problem is that, for example, MI commands use bits 22:16 for other fields
+ * such as GGTT vs PPGTT bits. If we include those bits in the mask then when
+ * we mask a command from a batch it could hash to the wrong bucket due to
+ * non-opcode bits being set. But if we don't include those bits, some 3D
+ * commands may hash to the same bucket due to not including opcode bits that
+ * make the command unique. For now, we will risk hashing to the same bucket.
+ *
+ * If we attempt to generate a perfect hash, we should be able to look at bits
+ * 31:29 of a command from a batch buffer and use the full mask for that
+ * client. The existing INSTR_CLIENT_MASK/SHIFT defines can be used for this.
+ */
+#define CMD_HASH_MASK STD_MI_OPCODE_MASK
+
+static int init_hash_table(struct intel_ring_buffer *ring,
+ const struct drm_i915_cmd_table *cmd_tables,
+ int cmd_table_count)
+{
+ int i, j;
+
+ hash_init(ring->cmd_hash);
+
+ for (i = 0; i < cmd_table_count; i++) {
+ const struct drm_i915_cmd_table *table = &cmd_tables[i];
+
+ for (j = 0; j < table->count; j++) {
+ const struct drm_i915_cmd_descriptor *desc =
+ &table->table[j];
+ struct cmd_node *desc_node =
+ kmalloc(sizeof(*desc_node), GFP_KERNEL);
+
+ if (!desc_node)
+ return -ENOMEM;
+
+ desc_node->desc = desc;
+ hash_add(ring->cmd_hash, &desc_node->node,
+ desc->cmd.value & CMD_HASH_MASK);
+ }
+ }
+
+ return 0;
+}
+
+static void fini_hash_table(struct intel_ring_buffer *ring)
+{
+ struct hlist_node *tmp;
+ struct cmd_node *desc_node;
+ int i;
+
+ hash_for_each_safe(ring->cmd_hash, i, tmp, desc_node, node) {
+ hash_del(&desc_node->node);
+ kfree(desc_node);
+ }
+}
+
/**
* i915_cmd_parser_init_ring() - set cmd parser related fields for a ringbuffer
* @ring: the ringbuffer to initialize
* Optionally initializes fields related to batch buffer command parsing in the
* struct intel_ring_buffer based on whether the platform requires software
* command parsing.
+ *
+ * Return: non-zero if initialization fails
*/
-void i915_cmd_parser_init_ring(struct intel_ring_buffer *ring)
+int i915_cmd_parser_init_ring(struct intel_ring_buffer *ring)
{
+ const struct drm_i915_cmd_table *cmd_tables;
+ int cmd_table_count;
+ int ret;
+
if (!IS_GEN7(ring->dev))
- return;
+ return 0;
switch (ring->id) {
case RCS:
if (IS_HASWELL(ring->dev)) {
- ring->cmd_tables = hsw_render_ring_cmds;
- ring->cmd_table_count =
+ cmd_tables = hsw_render_ring_cmds;
+ cmd_table_count =
ARRAY_SIZE(hsw_render_ring_cmds);
} else {
- ring->cmd_tables = gen7_render_cmds;
- ring->cmd_table_count = ARRAY_SIZE(gen7_render_cmds);
+ cmd_tables = gen7_render_cmds;
+ cmd_table_count = ARRAY_SIZE(gen7_render_cmds);
}
ring->reg_table = gen7_render_regs;
ring->get_cmd_length_mask = gen7_render_get_cmd_length_mask;
break;
case VCS:
- ring->cmd_tables = gen7_video_cmds;
- ring->cmd_table_count = ARRAY_SIZE(gen7_video_cmds);
+ cmd_tables = gen7_video_cmds;
+ cmd_table_count = ARRAY_SIZE(gen7_video_cmds);
ring->get_cmd_length_mask = gen7_bsd_get_cmd_length_mask;
break;
case BCS:
if (IS_HASWELL(ring->dev)) {
- ring->cmd_tables = hsw_blt_ring_cmds;
- ring->cmd_table_count = ARRAY_SIZE(hsw_blt_ring_cmds);
+ cmd_tables = hsw_blt_ring_cmds;
+ cmd_table_count = ARRAY_SIZE(hsw_blt_ring_cmds);
} else {
- ring->cmd_tables = gen7_blt_cmds;
- ring->cmd_table_count = ARRAY_SIZE(gen7_blt_cmds);
+ cmd_tables = gen7_blt_cmds;
+ cmd_table_count = ARRAY_SIZE(gen7_blt_cmds);
}
ring->reg_table = gen7_blt_regs;
ring->get_cmd_length_mask = gen7_blt_get_cmd_length_mask;
break;
case VECS:
- ring->cmd_tables = hsw_vebox_cmds;
- ring->cmd_table_count = ARRAY_SIZE(hsw_vebox_cmds);
+ cmd_tables = hsw_vebox_cmds;
+ cmd_table_count = ARRAY_SIZE(hsw_vebox_cmds);
/* VECS can use the same length_mask function as VCS */
ring->get_cmd_length_mask = gen7_bsd_get_cmd_length_mask;
break;
BUG();
}
- BUG_ON(!validate_cmds_sorted(ring));
+ BUG_ON(!validate_cmds_sorted(ring, cmd_tables, cmd_table_count));
BUG_ON(!validate_regs_sorted(ring));
+
+ ret = init_hash_table(ring, cmd_tables, cmd_table_count);
+ if (ret) {
+ DRM_ERROR("CMD: cmd_parser_init failed!\n");
+ fini_hash_table(ring);
+ return ret;
+ }
+
+ ring->needs_cmd_parser = true;
+
+ return 0;
+}
+
+/**
+ * i915_cmd_parser_fini_ring() - clean up cmd parser related fields
+ * @ring: the ringbuffer to clean up
+ *
+ * Releases any resources related to command parsing that may have been
+ * initialized for the specified ring.
+ */
+void i915_cmd_parser_fini_ring(struct intel_ring_buffer *ring)
+{
+ if (!ring->needs_cmd_parser)
+ return;
+
+ fini_hash_table(ring);
}
static const struct drm_i915_cmd_descriptor*
-find_cmd_in_table(const struct drm_i915_cmd_table *table,
+find_cmd_in_table(struct intel_ring_buffer *ring,
u32 cmd_header)
{
- int i;
+ struct cmd_node *desc_node;
- for (i = 0; i < table->count; i++) {
- const struct drm_i915_cmd_descriptor *desc = &table->table[i];
+ hash_for_each_possible(ring->cmd_hash, desc_node, node,
+ cmd_header & CMD_HASH_MASK) {
+ const struct drm_i915_cmd_descriptor *desc = desc_node->desc;
u32 masked_cmd = desc->cmd.mask & cmd_header;
u32 masked_value = desc->cmd.value & desc->cmd.mask;
u32 cmd_header,
struct drm_i915_cmd_descriptor *default_desc)
{
+ const struct drm_i915_cmd_descriptor *desc;
u32 mask;
- int i;
-
- for (i = 0; i < ring->cmd_table_count; i++) {
- const struct drm_i915_cmd_descriptor *desc;
- desc = find_cmd_in_table(&ring->cmd_tables[i], cmd_header);
- if (desc)
- return desc;
- }
+ desc = find_cmd_in_table(ring, cmd_header);
+ if (desc)
+ return desc;
mask = ring->get_cmd_length_mask(cmd_header);
if (!mask)
{
struct drm_i915_private *dev_priv = ring->dev->dev_private;
- /* No command tables indicates a platform without parsing */
- if (!ring->cmd_tables)
+ if (!ring->needs_cmd_parser)
return false;
/*
projects / mirror_ubuntu-disco-kernel.git / commitdiff