diff options
Diffstat (limited to 'src/freedreno')
| -rw-r--r-- | src/freedreno/vulkan/tu_cs.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/src/freedreno/vulkan/tu_cs.h b/src/freedreno/vulkan/tu_cs.h index e61b82e3c7d..e7fd0c42eb8 100644 --- a/src/freedreno/vulkan/tu_cs.h +++ b/src/freedreno/vulkan/tu_cs.h @@ -207,6 +207,46 @@ tu_cs_emit_call(struct tu_cs *cs, const struct tu_cs *target) tu_cs_emit_ib(cs, target->entries + i); } +/* Helpers for bracketing a large sequence of commands of unknown size inside + * a CP_COND_REG_EXEC packet. + */ + +struct tu_cond_exec_state { + uint32_t *dword_ptr; + uint32_t max_dwords; +}; + +static inline VkResult +tu_cond_exec_start(struct tu_device *dev, struct tu_cs *cs, + struct tu_cond_exec_state *state, + uint32_t condition, uint32_t max_dwords) +{ + /* Reserve enough space so that both the condition packet and the actual + * condition will fit in the same IB. + */ + VkResult result = tu_cs_reserve_space(dev, cs, max_dwords + 3); + if (result != VK_SUCCESS) + return result; + + state->max_dwords = max_dwords; + tu_cs_emit_pkt7(cs, CP_COND_REG_EXEC, 2); + tu_cs_emit(cs, condition); + state->dword_ptr = cs->cur; + /* Emit dummy DWORD field here */ + tu_cs_emit(cs, CP_COND_REG_EXEC_1_DWORDS(0)); + + return VK_SUCCESS; +} + +static inline void +tu_cond_exec_end(struct tu_cs *cs, struct tu_cond_exec_state *state) +{ + /* Subtract one here to account for the DWORD field itself. */ + uint32_t actual_dwords = cs->cur - state->dword_ptr - 1; + assert(actual_dwords <= state->max_dwords); + *state->dword_ptr = actual_dwords; +} + #define fd_reg_pair tu_reg_value #define __bo_type struct tu_bo * |