CUDA: use MMQ instead of cuBLAS by default (#8075)

ggml-cuda/mmq.cu

@@ -69,7 +69,13 @@ void ggml_cuda_op_mul_mat_q(
     GGML_UNUSED(src1_ddf_i);
 }
 
-bool ggml_cuda_supports_mmq(enum ggml_type type) {
+bool ggml_cuda_should_use_mmq(enum ggml_type type, int cc, int64_t ne11) {
+#ifdef GGML_CUDA_FORCE_CUBLAS
+    return false;
+#endif // GGML_CUDA_FORCE_CUBLAS
+
+    bool mmq_supported;
+
     switch (type) {
         case GGML_TYPE_Q4_0:
         case GGML_TYPE_Q4_1:
@@ -81,8 +87,32 @@ bool ggml_cuda_supports_mmq(enum ggml_type type) {
         case GGML_TYPE_Q4_K:
         case GGML_TYPE_Q5_K:
         case GGML_TYPE_Q6_K:
-            return true;
+            mmq_supported = true;
+            break;
         default:
-            return false;
+            mmq_supported = false;
+            break;
     }
+
+    if (!mmq_supported) {
+        return false;
+    }
+
+    if (int8_mma_available(cc)) {
+        return true;
+    }
+
+    if (cc < MIN_CC_DP4A) {
+        return false;
+    }
+
+#ifdef GGML_CUDA_FORCE_MMQ
+    return true;
+#endif //GGML_CUDA_FORCE_MMQ
+
+    if (cc < CC_OFFSET_AMD) {
+        return cc < CC_VOLTA || ne11 < MMQ_DP4A_MAX_BATCH_SIZE;
+    }
+
+    return cc < CC_RDNA3 || ne11 < MMQ_DP4A_MAX_BATCH_SIZE;
 }