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69be500c0b
Added debugfs node under ltc directory with name: intr_illegal_compstat_enable Enabling/disabling of ltc_illegal_compstat intr is possible through debugfs node. Since ltc state is lost with rail gate, this setting is cached and will be populated during ltc initialization. Bug 2099406 Change-Id: I4bf62228dfd2bbb94f87f923f9f4f6e5ad0b07f0 Signed-off-by: seshendra Gadagottu <sgadagottu@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/1774683 Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
94 lines
2.3 KiB
C
94 lines
2.3 KiB
C
/*
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* Copyright (C) 2018 NVIDIA Corporation. All rights reserved.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include "debug_ltc.h"
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#include "os_linux.h"
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#include "gk20a/gk20a.h"
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#include <linux/debugfs.h>
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#include <linux/uaccess.h>
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static ssize_t ltc_intr_illegal_compstat_read(struct file *file,
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char __user *user_buf, size_t count, loff_t *ppos)
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{
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char buf[3];
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struct gk20a *g = file->private_data;
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if (g->ltc_intr_en_illegal_compstat)
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buf[0] = 'Y';
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else
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buf[0] = 'N';
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buf[1] = '\n';
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buf[2] = 0x00;
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return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
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}
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static ssize_t ltc_intr_illegal_compstat_write(struct file *file,
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const char __user *user_buf, size_t count, loff_t *ppos)
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{
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char buf[3];
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int buf_size;
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bool intr_illegal_compstat_enabled;
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struct gk20a *g = file->private_data;
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int err;
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if (!g->ops.ltc.intr_en_illegal_compstat)
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return -EINVAL;
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buf_size = min(count, (sizeof(buf)-1));
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if (copy_from_user(buf, user_buf, buf_size))
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return -EFAULT;
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err = gk20a_busy(g);
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if (err)
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return err;
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if (strtobool(buf, &intr_illegal_compstat_enabled) == 0) {
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g->ops.ltc.intr_en_illegal_compstat(g,
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intr_illegal_compstat_enabled);
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g->ltc_intr_en_illegal_compstat = intr_illegal_compstat_enabled;
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}
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gk20a_idle(g);
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return buf_size;
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}
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static const struct file_operations ltc_intr_illegal_compstat_fops = {
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.open = simple_open,
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.read = ltc_intr_illegal_compstat_read,
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.write = ltc_intr_illegal_compstat_write,
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};
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int nvgpu_ltc_debugfs_init(struct gk20a *g)
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{
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struct dentry *d;
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struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
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struct dentry *gpu_root = l->debugfs;
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l->debugfs_ltc = debugfs_create_dir("ltc", gpu_root);
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if (IS_ERR_OR_NULL(l->debugfs_ltc))
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return -ENODEV;
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/* Debug fs node to enable/disable illegal_compstat */
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d = debugfs_create_file("intr_illegal_compstat_enable", 0600,
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l->debugfs_ltc, g,
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<c_intr_illegal_compstat_fops);
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if (!d)
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return -ENOMEM;
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return 0;
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}
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