ilo: let ilo_shader_compile_cs() return a dummy shader

The dummy shader sends an EOT message to end itself.  There are many more
works need to be done on the compiler side before we can advertise
PIPE_CAP_COMPUTE.

Signed-off-by: Chia-I Wu <olvaffe@gmail.com>

diff --git a/src/gallium/drivers/ilo/shader/ilo_shader_cs.c b/src/gallium/drivers/ilo/shader/ilo_shader_cs.c
index 880ec57ae41b9f8a989f1fa2b5f3a11891e9743d..fd86070fb754eb564cab4078e27677789ab0c4be 100644 (file)
--- a/src/gallium/drivers/ilo/shader/ilo_shader_cs.c
+++ b/src/gallium/drivers/ilo/shader/ilo_shader_cs.c
@@ -25,8 +25,176 @@
  *    Chia-I Wu <olv@lunarg.com>
  */
 
+#include "toy_compiler.h"
+#include "toy_helpers.h"
+#include "toy_legalize.h"
+#include "toy_optimize.h"
 #include "ilo_shader_internal.h"
 
+struct cs_compile_context {
+   struct ilo_shader *shader;
+   const struct ilo_shader_variant *variant;
+
+   struct toy_compiler tc;
+
+   int first_free_grf;
+   int last_free_grf;
+
+   int num_grf_per_vrf;
+
+   int first_free_mrf;
+   int last_free_mrf;
+};
+
+/**
+ * Compile the shader.
+ */
+static bool
+cs_compile(struct cs_compile_context *ccc)
+{
+   struct toy_compiler *tc = &ccc->tc;
+   struct ilo_shader *sh = ccc->shader;
+
+   toy_compiler_legalize_for_ra(tc);
+   toy_compiler_optimize(tc);
+   toy_compiler_allocate_registers(tc,
+         ccc->first_free_grf,
+         ccc->last_free_grf,
+         ccc->num_grf_per_vrf);
+   toy_compiler_legalize_for_asm(tc);
+
+   if (tc->fail) {
+      ilo_err("failed to legalize FS instructions: %s\n", tc->reason);
+      return false;
+   }
+
+   if (ilo_debug & ILO_DEBUG_CS) {
+      ilo_printf("legalized instructions:\n");
+      toy_compiler_dump(tc);
+      ilo_printf("\n");
+   }
+
+   if (true) {
+      sh->kernel = toy_compiler_assemble(tc, &sh->kernel_size);
+   } else {
+      static const uint32_t microcode[] = {
+         /* fill in the microcode here */
+         0x0, 0x0, 0x0, 0x0,
+      };
+      const bool swap = true;
+
+      sh->kernel_size = sizeof(microcode);
+      sh->kernel = MALLOC(sh->kernel_size);
+
+      if (sh->kernel) {
+         const int num_dwords = sizeof(microcode) / 4;
+         const uint32_t *src = microcode;
+         uint32_t *dst = (uint32_t *) sh->kernel;
+         int i;
+
+         for (i = 0; i < num_dwords; i += 4) {
+            if (swap) {
+               dst[i + 0] = src[i + 3];
+               dst[i + 1] = src[i + 2];
+               dst[i + 2] = src[i + 1];
+               dst[i + 3] = src[i + 0];
+            }
+            else {
+               memcpy(dst, src, 16);
+            }
+         }
+      }
+   }
+
+   if (!sh->kernel) {
+      ilo_err("failed to compile CS: %s\n", tc->reason);
+      return false;
+   }
+
+   if (ilo_debug & ILO_DEBUG_CS) {
+      ilo_printf("disassembly:\n");
+      toy_compiler_disassemble(tc->dev, sh->kernel, sh->kernel_size, false);
+      ilo_printf("\n");
+   }
+
+   return true;
+}
+
+static void
+cs_dummy(struct cs_compile_context *ccc)
+{
+   struct toy_compiler *tc = &ccc->tc;
+   struct toy_dst header;
+   struct toy_src r0, desc;
+   struct toy_inst *inst;
+
+   header = tdst_ud(tdst(TOY_FILE_MRF, ccc->first_free_mrf, 0));
+   r0 = tsrc_ud(tsrc(TOY_FILE_GRF, 0, 0));
+
+   inst = tc_MOV(tc, header, r0);
+   inst->exec_size = GEN6_EXECSIZE_8;
+   inst->mask_ctrl = GEN6_MASKCTRL_NOMASK;
+
+   desc = tsrc_imm_mdesc(tc, true, 1, 0, true,
+         GEN6_MSG_TS_RESOURCE_SELECT_NO_DEREF |
+         GEN6_MSG_TS_REQUESTER_TYPE_ROOT |
+         GEN6_MSG_TS_OPCODE_DEREF);
+
+   tc_SEND(tc, tdst_null(), tsrc_from(header), desc, GEN6_SFID_SPAWNER);
+}
+
+static bool
+cs_setup(struct cs_compile_context *ccc,
+         const struct ilo_shader_state *state,
+         const struct ilo_shader_variant *variant)
+{
+   memset(ccc, 0, sizeof(*ccc));
+
+   ccc->shader = CALLOC_STRUCT(ilo_shader);
+   if (!ccc->shader)
+      return false;
+
+   ccc->variant = variant;
+
+   toy_compiler_init(&ccc->tc, state->info.dev);
+
+   ccc->tc.templ.access_mode = GEN6_ALIGN_1;
+   ccc->tc.templ.qtr_ctrl = GEN6_QTRCTRL_1H;
+   ccc->tc.templ.exec_size = GEN6_EXECSIZE_16;
+   ccc->tc.rect_linear_width = 8;
+
+   ccc->first_free_grf = 1;
+   ccc->last_free_grf = 127;
+
+   /* m0 is reserved for system routines */
+   ccc->first_free_mrf = 1;
+   ccc->last_free_mrf = 15;
+
+   /* instructions are compressed with GEN6_EXECSIZE_16 */
+   ccc->num_grf_per_vrf = 2;
+
+   if (ilo_dev_gen(ccc->tc.dev) >= ILO_GEN(7)) {
+      ccc->last_free_grf -= 15;
+      ccc->first_free_mrf = ccc->last_free_grf + 1;
+      ccc->last_free_mrf = ccc->first_free_mrf + 14;
+   }
+
+   ccc->shader->in.start_grf = 1;
+   ccc->shader->dispatch_16 = true;
+
+   /* INPUT */
+   ccc->shader->bt.const_base = 0;
+   ccc->shader->bt.const_count = 1;
+
+   /* a GLOBAL */
+   ccc->shader->bt.global_base = 1;
+   ccc->shader->bt.global_count = 1;
+
+   ccc->shader->bt.total_count = 2;
+
+   return true;
+}
+
 /**
  * Compile the compute shader.
  */
@@ -34,5 +202,21 @@ struct ilo_shader *
 ilo_shader_compile_cs(const struct ilo_shader_state *state,
                       const struct ilo_shader_variant *variant)
 {
-   return NULL;
+   struct cs_compile_context ccc;
+
+   ILO_DEV_ASSERT(state->info.dev, 7, 7.5);
+
+   if (!cs_setup(&ccc, state, variant))
+      return NULL;
+
+   cs_dummy(&ccc);
+
+   if (!cs_compile(&ccc)) {
+      FREE(ccc.shader);
+      ccc.shader = NULL;
+   }
+
+   toy_compiler_cleanup(&ccc.tc);
+
+   return ccc.shader;
 }