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- /*
- *****************************************************************************
- * Copyright (c) Imagination Technologies Ltd.
- *
- * The contents of this file are subject to the MIT license as set out below.
- *
- * 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.
- *
- * Alternatively, the contents of this file may be used under the terms of the
- * GNU General Public License Version 2 ("GPL")in which case the provisions of
- * GPL are applicable instead of those above.
- *
- * If you wish to allow use of your version of this file only under the terms
- * of GPL, and not to allow others to use your version of this file under the
- * terms of the MIT license, indicate your decision by deleting the provisions
- * above and replace them with the notice and other provisions required by GPL
- * as set out in the file called "GPLHEADER" included in this distribution. If
- * you do not delete the provisions above, a recipient may use your version of
- * this file under the terms of either the MIT license or GPL.
- *
- * This License is also included in this distribution in the file called
- * "MIT_COPYING".
- *
- *****************************************************************************/
- #include <linux/delay.h>
- #include <linux/slab.h>
- #include <linux/device.h>
- #include <linux/gfp.h>
- #include <linux/moduleparam.h>
- #include <linux/list.h>
- #include <linux/debugfs.h>
- #include <linux/uaccess.h>
- #include <uapi/vha.h>
- #include "vha_common.h"
- #include "vha_plat.h"
- #include "vha_io.h"
- #define VHA_MAX_NUM_SEGMENTS 10
- static bool generate_crcs_enable = true;
- module_param(generate_crcs_enable, bool, 0444);
- MODULE_PARM_DESC(generate_crcs_enable,
- "Enable generating safety CRCs");
- struct vha_sc_dbgfs_ctx {
- struct dentry *sc_debugfs_dir;
- struct dentry *crcs_dir;
- struct dentry *crcs_sub_dirs[VHA_MAX_NUM_SEGMENTS];
- uint32_t num_cores_used[VHA_MAX_NUM_SEGMENTS];
- uint32_t latest_crcs[VHA_MAX_NUM_SEGMENTS][VHA_NUM_CORES];
- uint8_t segment_crc_idx_to_use;
- uint8_t num_segments;
- };
- static ssize_t vha_bin_crcs_read(struct file *file, char __user *buf,
- size_t count, loff_t *ppos)
- {
- struct vha_dev *vha = file->private_data;
- uint32_t bin_crcs[VHA_MAX_NUM_SEGMENTS * VHA_MAX_CORES] = { 0 };
- struct vha_sc_dbgfs_ctx *ctx = (struct vha_sc_dbgfs_ctx *)vha->sc_dbgfs_ctx;
- size_t bytes = 0;
- uint32_t offset = 0;
- int i, j;
- if (*ppos)
- return 0;
- for (i = 0; i < ctx->num_segments; i++) {
- for (j = 0; j < ctx->num_cores_used[i]; j++) {
- bin_crcs[offset] = ctx->latest_crcs[i][j];
- offset++;
- }
- }
- if (copy_to_user(buf, bin_crcs, offset * sizeof(bin_crcs[0]))) {
- dev_err(vha->dev, "%s: bin_crcs read: copy to user failed\n",
- __func__);
- return -EFAULT;
- }
- if (count < offset)
- return -EINVAL;
- bytes = offset * sizeof(uint32_t);
- *ppos = bytes;
- return bytes;
- }
- static const struct file_operations vha_crcs_bin_fops = {
- .owner = THIS_MODULE,
- .open = simple_open,
- .read = vha_bin_crcs_read,
- };
- static ssize_t vha_crcs_reset_write(struct file *file, const char __user *buf,
- size_t count, loff_t *ppos)
- {
- struct vha_dev *vha = file->private_data;
- struct vha_sc_dbgfs_ctx *ctx = (struct vha_sc_dbgfs_ctx *)vha->sc_dbgfs_ctx;
- if (ctx->crcs_dir) {
- int i = 0;
- for (i = 0; i < VHA_MAX_NUM_SEGMENTS; i++)
- if (ctx->crcs_sub_dirs[i]) {
- debugfs_remove_recursive(ctx->crcs_sub_dirs[i]);
- ctx->crcs_sub_dirs[i] = NULL;
- }
- ctx->segment_crc_idx_to_use = 0;
- memset(ctx->latest_crcs, 0, sizeof(ctx->latest_crcs));
- memset(ctx->num_cores_used, 0, sizeof(ctx->num_cores_used));
- }
- return count;
- }
- static const struct file_operations vha_crcs_reset_fops = {
- .write = vha_crcs_reset_write,
- .open = simple_open,
- };
- void vha_update_crcs(struct vha_dev *vha, uint32_t crcs[VHA_NUM_CORES], int n) {
- struct vha_sc_dbgfs_ctx *ctx = (struct vha_sc_dbgfs_ctx *)vha->sc_dbgfs_ctx;
- if (ctx->crcs_dir && ctx->num_segments) {
- uint8_t i;
- uint8_t crc_idx = ctx->segment_crc_idx_to_use;
- char core_txt[7] = "core_x";
- if (crc_idx >= VHA_MAX_NUM_SEGMENTS) {
- dev_warn_once(vha->dev, "%s: unable to update crcs, too many segments\n", __func__);
- return;
- }
- if (ctx->crcs_sub_dirs[crc_idx] == NULL) {
- char dir_txt[10] = "segment_x";
- snprintf(dir_txt, sizeof(dir_txt), "segment_%d", crc_idx);
- ctx->crcs_sub_dirs[crc_idx] = debugfs_create_dir(dir_txt, ctx->crcs_dir);
- for (i = 0; i < n; i++) {
- snprintf(core_txt, sizeof(core_txt), "core_%d", i);
- debugfs_create_x32(core_txt, S_IRUGO, ctx->crcs_sub_dirs[crc_idx],
- &ctx->latest_crcs[crc_idx][i]);
- }
- }
- ctx->num_cores_used[crc_idx] = n;
- for (i = 0; i < n; i++)
- ctx->latest_crcs[crc_idx][i] = crcs[i];
- ctx->segment_crc_idx_to_use++;
- if (ctx->segment_crc_idx_to_use >= ctx->num_segments)
- ctx->segment_crc_idx_to_use = 0;
- }
- }
- void vha_sc_dbg_init(struct vha_dev *vha, struct dentry *debugfs_dir)
- {
- struct vha_sc_dbgfs_ctx *ctx = devm_kzalloc(vha->dev,
- sizeof(struct vha_sc_dbgfs_ctx), GFP_KERNEL);
- if (!ctx) {
- dev_err(vha->dev,
- "%s: Out of memory when creating debugfs context!\n",
- __func__);
- return;
- }
- /* Create userspace node */
- if (!debugfs_dir) {
- dev_warn(vha->dev,
- "%s: Probably debugfs not enabled in this kernel!\n",
- __func__);
- return;
- }
- #define VHA_DBGFS_CREATE_FILE_IN_DIR(_perm_, _name_, _fops_, dir) \
- { \
- if (!debugfs_create_file(_name_, \
- _perm_, ctx->dir, vha, \
- &vha_##_fops_##_fops)) { \
- dev_warn(vha->dev, \
- "%s: failed to create %s dbg file!\n", \
- __func__, _name_); \
- } \
- }
- #if LINUX_VERSION_CODE >= KERNEL_VERSION(5,7,0)
- #define CTX_DBGFS_CREATE_RW(_type_, _name_, _ctx_dev_member_, dir) \
- { \
- struct dentry *dentry; \
- debugfs_create_##_type_(_name_, \
- S_IWUSR|S_IRUGO, ctx->dir, \
- &ctx->_ctx_dev_member_); \
- dentry = debugfs_lookup(_name_, ctx->dir); \
- if (!dentry) { \
- dev_warn(vha->dev, \
- "%s: failed to create %s dbg file!\n", \
- __func__, _name_); \
- } else { \
- dput(dentry); \
- } \
- }
- #else
- #define CTX_DBGFS_CREATE_RW(_type_, _name_, _ctx_dev_member_, dir) \
- { \
- if (!debugfs_create_##_type_(_name_, \
- S_IWUSR|S_IRUGO, ctx->dir, \
- &ctx->_ctx_dev_member_)) { \
- dev_warn(vha->dev, \
- "%s: failed to create %s dbg file!\n", \
- __func__, _name_); \
- } \
- }
- #endif
- ctx->sc_debugfs_dir = debugfs_create_dir("sf_gen", debugfs_dir);
- CTX_DBGFS_CREATE_RW(u8, "num_segments", num_segments, sc_debugfs_dir);
- if (generate_crcs_enable) {
- ctx->crcs_dir = debugfs_create_dir("CRCs", ctx->sc_debugfs_dir);
- if (ctx->crcs_dir) {
- VHA_DBGFS_CREATE_FILE_IN_DIR(S_IWUSR, "crcs_reset", crcs_reset, crcs_dir);
- VHA_DBGFS_CREATE_FILE_IN_DIR(S_IRUGO, "crcs_bin", crcs_bin, crcs_dir);
- }
- }
- #undef VHA_DBGFS_CREATE_FILE_IN_DIR
- #undef CTX_DBGFS_CREATE_RW
- vha->sc_dbgfs_ctx = (void *)ctx;
- }
- void vha_sc_dbg_deinit(struct vha_dev *vha)
- {
- struct vha_sc_dbgfs_ctx *ctx =
- (struct vha_sc_dbgfs_ctx *)vha->sc_dbgfs_ctx;
- debugfs_remove_recursive(ctx->sc_debugfs_dir);
- }
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