mirror of
git://nv-tegra.nvidia.com/linux-nvgpu.git
synced 2025-12-22 17:36:20 +03:00
4b889fb8b0
While removing nvgpu driver, devm mapped reg mappings are released on driver_unregister. For iGPU, these regs are explicitly unmapped with iounmap(). This results in "Trying to vfree() nonexistent vm area" warnings on driver removal. Address this by using devm* variants to map all IO regions of both iGPU and dGPU and let the driver unregister release these mappings. Also, lock out GPU regs in driver removal path. Bug 1987855 Change-Id: I0388daf90bea3eaf8752255059cfd3ceabf66e7d Signed-off-by: Nitin Kumbhar <nkumbhar@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/1730539 Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
96 lines
2.4 KiB
C
96 lines
2.4 KiB
C
/*
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* Copyright (c) 2018, NVIDIA CORPORATION. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/io.h>
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#include <linux/highmem.h>
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#include <linux/platform_device.h>
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#include <nvgpu/log.h>
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#include <nvgpu/linux/vm.h>
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#include <nvgpu/bitops.h>
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#include <nvgpu/nvgpu_mem.h>
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#include <nvgpu/dma.h>
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#include <nvgpu/soc.h>
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#include <nvgpu/hw_sim.h>
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#include <nvgpu/sim.h>
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#include "gk20a/gk20a.h"
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#include "platform_gk20a.h"
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#include "os_linux.h"
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#include "module.h"
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void sim_writel(struct sim_nvgpu *sim, u32 r, u32 v)
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{
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struct sim_nvgpu_linux *sim_linux =
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container_of(sim, struct sim_nvgpu_linux, sim);
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writel(v, sim_linux->regs + r);
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}
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u32 sim_readl(struct sim_nvgpu *sim, u32 r)
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{
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struct sim_nvgpu_linux *sim_linux =
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container_of(sim, struct sim_nvgpu_linux, sim);
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return readl(sim_linux->regs + r);
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}
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void nvgpu_remove_sim_support_linux(struct gk20a *g)
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{
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struct sim_nvgpu_linux *sim_linux;
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if (!g->sim)
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return;
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sim_linux = container_of(g->sim, struct sim_nvgpu_linux, sim);
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if (sim_linux->regs) {
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sim_writel(g->sim, sim_config_r(), sim_config_mode_disabled_v());
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iounmap(sim_linux->regs);
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sim_linux->regs = NULL;
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}
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nvgpu_kfree(g, sim_linux);
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g->sim = NULL;
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}
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int nvgpu_init_sim_support_linux(struct gk20a *g,
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struct platform_device *dev)
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{
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struct sim_nvgpu_linux *sim_linux;
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int err = -ENOMEM;
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if (!nvgpu_platform_is_simulation(g))
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return 0;
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sim_linux = nvgpu_kzalloc(g, sizeof(*sim_linux));
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if (!sim_linux)
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return err;
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g->sim = &sim_linux->sim;
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g->sim->g = g;
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sim_linux->regs = nvgpu_devm_ioremap_resource(dev,
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GK20A_SIM_IORESOURCE_MEM,
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&sim_linux->reg_mem);
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if (IS_ERR(sim_linux->regs)) {
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nvgpu_err(g, "failed to remap gk20a sim regs");
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err = PTR_ERR(sim_linux->regs);
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goto fail;
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}
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sim_linux->remove_support_linux = nvgpu_remove_sim_support_linux;
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return 0;
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fail:
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nvgpu_remove_sim_support_linux(g);
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return err;
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}
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