Open source GPL/LGPL release

drivers/gpu/nvgpu/os/linux/sim_pci.c

@@ -0,0 +1,97 @@
+/*
+ * Copyright (c) 2017-2021, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/io.h>
+#include <linux/highmem.h>
+#include <linux/platform_device.h>
+
+#include <nvgpu/log.h>
+#include <nvgpu/linux/vm.h>
+#include <nvgpu/bitops.h>
+#include <nvgpu/nvgpu_mem.h>
+#include <nvgpu/dma.h>
+#include <nvgpu/hw_sim_pci.h>
+#include <nvgpu/sim.h>
+#include <nvgpu/io.h>
+#include <nvgpu/gk20a.h>
+#include <nvgpu/soc.h>
+
+#include "os_linux.h"
+#include "module.h"
+
+static bool _nvgpu_pci_is_simulation(struct gk20a *g, u32 sim_base)
+{
+	u32 cfg;
+	bool is_simulation = false;
+
+	if (nvgpu_platform_is_silicon(g)) {
+		return is_simulation;
+	}
+
+	cfg = nvgpu_readl(g, sim_base + sim_config_r());
+
+	if ((sim_config_simulation_v(cfg) == sim_config_simulation_fmodel_v())
+	    || (sim_config_mode_v(cfg) == sim_config_mode_enabled_v())) {
+		is_simulation = true;
+	}
+
+	return is_simulation;
+}
+
+void nvgpu_remove_sim_support_linux_pci(struct gk20a *g)
+{
+	struct sim_nvgpu_linux *sim_linux;
+
+	if (!nvgpu_is_enabled(g, NVGPU_IS_FMODEL)) {
+		return;
+	}
+
+	if (!g->sim) {
+		nvgpu_warn(g, "sim_gk20a not allocated");
+		return;
+	}
+	sim_linux = container_of(g->sim, struct sim_nvgpu_linux, sim);
+
+	if (g->sim->regs) {
+		sim_writel(g->sim, sim_config_r(), sim_config_mode_disabled_v());
+		g->sim->regs = 0U;
+	}
+	nvgpu_kfree(g, sim_linux);
+	g->sim = NULL;
+}
+
+int nvgpu_init_sim_support_linux_pci(struct gk20a *g)
+{
+	struct sim_nvgpu_linux *sim_linux;
+	int err = -ENOMEM;
+	bool is_simulation;
+
+	is_simulation = _nvgpu_pci_is_simulation(g, sim_r());
+	nvgpu_set_enabled(g, NVGPU_IS_FMODEL, is_simulation);
+
+	if (!is_simulation)
+		return 0;
+
+	sim_linux = nvgpu_kzalloc(g, sizeof(*sim_linux));
+	if (!sim_linux)
+		return err;
+	g->sim = &sim_linux->sim;
+	g->sim->g = g;
+	g->sim->regs = g->regs + sim_r();
+	sim_linux->remove_support_linux = nvgpu_remove_sim_support_linux_pci;
+
+	return 0;
+}