Open source GPL/LGPL release

drivers/gpu/nvgpu/common/nvlink/minion.c

@@ -0,0 +1,143 @@
+/*
+ * Copyright (c) 2019, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <nvgpu/gk20a.h>
+#include <nvgpu/firmware.h>
+#include <nvgpu/timers.h>
+#include <nvgpu/nvlink_minion.h>
+
+#ifdef CONFIG_NVGPU_NVLINK
+
+/* Extract a WORD from the MINION ucode */
+u32 nvgpu_nvlink_minion_extract_word(struct nvgpu_firmware *fw, u32 idx)
+{
+	u32 out_data = 0U;
+	u8 byte = 0U;
+	u32 i = 0U;
+
+	for (i = 0U; i < 4U; i++) {
+		byte = fw->data[idx + i];
+		out_data |= ((u32)byte) << (8U * i);
+	}
+
+	return out_data;
+}
+
+/*
+ * Load minion FW and set up bootstrap
+ */
+int nvgpu_nvlink_minion_load(struct gk20a *g)
+{
+	int err = 0;
+	struct nvgpu_firmware *nvgpu_minion_fw = NULL;
+	struct nvgpu_timeout timeout;
+	u32 delay = POLL_DELAY_MIN_US;
+	bool boot_cmplte;
+
+	nvgpu_log_fn(g, " ");
+
+	if (g->ops.nvlink.minion.is_running(g)) {
+		return 0;
+	}
+
+	/* Get minion ucode binary */
+	if (g->ops.nvlink.minion.is_debug_mode != NULL) {
+		if (g->ops.nvlink.minion.is_debug_mode(g)) {
+			nvgpu_minion_fw = nvgpu_request_firmware(g,
+							"dgpu_minion_debug.bin", 0);
+		} else {
+			nvgpu_minion_fw = nvgpu_request_firmware(g,
+							"dgpu_minion_prod.bin", 0);
+		}
+	}
+
+	if (nvgpu_minion_fw == NULL) {
+		nvgpu_err(g, "minion ucode get fail");
+		err = -ENOENT;
+		goto exit;
+	}
+
+	/* Minion reset */
+	err = nvgpu_falcon_reset(&g->minion_flcn);
+	if (err != 0) {
+		nvgpu_err(g, "Minion reset failed");
+		goto exit;
+	}
+
+	/* Clear interrupts */
+	g->ops.nvlink.minion.clear_intr(g);
+
+	err = nvgpu_nvlink_minion_load_ucode(g, nvgpu_minion_fw);
+	if (err != 0) {
+		goto exit;
+	}
+
+	/* set BOOTVEC to start of non-secure code */
+	err = nvgpu_falcon_bootstrap(&g->minion_flcn, 0x0);
+	if (err != 0) {
+		nvgpu_err(g, "Minion bootstrap failed");
+		goto exit;
+	}
+
+	err = nvgpu_timeout_init(g, &timeout, nvgpu_get_poll_timeout(g),
+		NVGPU_TIMER_CPU_TIMER);
+	if (err != 0) {
+		nvgpu_err(g, "Minion boot timeout init failed");
+		goto exit;
+	}
+
+	do {
+		err = g->ops.nvlink.minion.is_boot_complete(g, &boot_cmplte);
+		if (err != 0) {
+			goto exit;
+		}
+		if (boot_cmplte) {
+			nvgpu_log(g, gpu_dbg_nvlink,"MINION boot successful");
+			break;
+		}
+		nvgpu_usleep_range(delay, delay * 2U);
+		delay = min_t(unsigned int,
+				delay << 1, POLL_DELAY_MAX_US);
+	} while (nvgpu_timeout_expired_msg(&timeout,
+						"minion boot timeout") == 0);
+
+	/* Service interrupts */
+	g->ops.nvlink.minion.falcon_isr(g);
+
+	if (nvgpu_timeout_peek_expired(&timeout)) {
+		err = -ETIMEDOUT;
+		goto exit;
+	}
+
+	g->ops.nvlink.minion.init_intr(g);
+
+	nvgpu_release_firmware(g, nvgpu_minion_fw);
+
+	return err;
+
+exit:
+	nvgpu_nvlink_free_minion_used_mem(g, nvgpu_minion_fw);
+	return err;
+}
+
+#endif
+