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tegra_bootloader_debug: use runtime debugfs check

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When kernel command line debugfs=off is specified instead of
disabling CONFIG_DEBUG_FS in defconfig to disable Debug-FS,
debugfs functions like debugfs_create_dir will fail.

Use function debugfs_initialized() to check if debugfs
functionality is enabled before calling any debugfs functions.

This allows us to by-pass debugfs initialization if debugfs
is not enabled.

Bug 3896536

Change-Id: I18182f2e5f8a6b466286980907b2019961ff7e39
Signed-off-by: Bharat Nihalani <bnihalani@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2864651
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: svc-mobile-cert <svc-mobile-cert@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
This commit is contained in:
Bharat Nihalani
2023-02-28 07:00:26 +00:00
committed by mobile promotions
parent d831cd1882
commit ae8499fa84
1 changed files with 80 additions and 77 deletions
Download Patch File Download Diff File Expand all files Collapse all files

157
drivers/platform/tegra/tegra_bootloader_debug.c
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@@ -311,91 +311,94 @@ static int __init tegra_bootloader_debuginit(void)
void __iomem *ptr_bl_debug_data_start = NULL;
void __iomem *ptr_bl_boot_cfg_start = NULL;
bl_debug_node = debugfs_create_dir(dir_name, NULL);
if (debugfs_initialized()) {
bl_debug_node = debugfs_create_dir(dir_name, NULL);
if (IS_ERR_OR_NULL(bl_debug_node)) {
pr_err("%s: failed to create debugfs entries: %ld\n",
module_name, PTR_ERR(bl_debug_node));
goto out_err;
}
pr_info("%s: created %s directory\n", module_name, dir_name);
bl_debug_verify_reg_node = debugfs_create_file(gr_file_mb1, S_IRUGO,
bl_debug_node, NULL, &debug_gr_fops_mb1);
if (IS_ERR_OR_NULL(bl_debug_verify_reg_node)) {
pr_err("%s: failed to create debugfs entries: %ld\n",
module_name, PTR_ERR(bl_debug_verify_reg_node));
goto out_err;
}
bl_debug_verify_reg_node = debugfs_create_file(gr_file_mb2, S_IRUGO,
bl_debug_node, NULL, &debug_gr_fops_mb2);
if (IS_ERR_OR_NULL(bl_debug_verify_reg_node)) {
pr_err("%s: failed to create debugfs entries: %ld\n",
module_name, PTR_ERR(bl_debug_verify_reg_node));
goto out_err;
}
bl_debug_verify_reg_node = debugfs_create_file(gr_file_cpu_bl, S_IRUGO,
bl_debug_node, NULL, &debug_gr_fops_cpu_bl);
if (IS_ERR_OR_NULL(bl_debug_verify_reg_node)) {
pr_err("%s: failed to create debugfs entries: %ld\n",
module_name, PTR_ERR(bl_debug_verify_reg_node));
goto out_err;
}
tegra_bl_mapped_debug_data_start =
phys_to_virt(tegra_bl_debug_data_start);
if (tegra_bl_debug_data_start != 0
&& !pfn_valid(__phys_to_pfn(tegra_bl_debug_data_start))) {
ptr_bl_debug_data_start = ioremap(tegra_bl_debug_data_start,
tegra_bl_debug_data_size);
WARN_ON(!ptr_bl_debug_data_start);
if (!ptr_bl_debug_data_start) {
pr_err("%s: Failed to map tegra_bl_debug_data_start%08x\n",
__func__, (unsigned int)tegra_bl_debug_data_start);
goto out_err;
}
pr_info("Remapped tegra_bl_debug_data_start(0x%llx)"
" to address(0x%llx), size(0x%llx)\n",
(u64)tegra_bl_debug_data_start,
(__force u64)ptr_bl_debug_data_start,
(u64)tegra_bl_debug_data_size);
tegra_bl_mapped_debug_data_start = (__force void *)ptr_bl_debug_data_start;
}
/*
* The BCP can be optional, so ignore creating if variables are not set
*/
if (tegra_bl_bcp_start && tegra_bl_bcp_size) {
bl_debug_boot_cfg = debugfs_create_file(boot_cfg, 0444,
bl_debug_node, NULL, &boot_cfg_fops);
if (IS_ERR_OR_NULL(bl_debug_boot_cfg)) {
if (IS_ERR_OR_NULL(bl_debug_node)) {
pr_err("%s: failed to create debugfs entries: %ld\n",
__func__, PTR_ERR(bl_debug_boot_cfg));
module_name, PTR_ERR(bl_debug_node));
goto out_err;
}
tegra_bl_mapped_boot_cfg_start =
phys_to_virt(tegra_bl_bcp_start);
if (!pfn_valid(__phys_to_pfn(tegra_bl_bcp_start))) {
ptr_bl_boot_cfg_start = ioremap(tegra_bl_bcp_start,
tegra_bl_bcp_size);
pr_info("%s: created %s directory\n", module_name, dir_name);
WARN_ON(!ptr_bl_boot_cfg_start);
if (!ptr_bl_boot_cfg_start) {
pr_err("%s: Failed to map tegra_bl_prof_start %08x\n",
__func__,
(unsigned int)tegra_bl_bcp_start);
bl_debug_verify_reg_node = debugfs_create_file(gr_file_mb1, S_IRUGO,
bl_debug_node, NULL, &debug_gr_fops_mb1);
if (IS_ERR_OR_NULL(bl_debug_verify_reg_node)) {
pr_err("%s: failed to create debugfs entries: %ld\n",
module_name, PTR_ERR(bl_debug_verify_reg_node));
goto out_err;
}
bl_debug_verify_reg_node = debugfs_create_file(gr_file_mb2, S_IRUGO,
bl_debug_node, NULL, &debug_gr_fops_mb2);
if (IS_ERR_OR_NULL(bl_debug_verify_reg_node)) {
pr_err("%s: failed to create debugfs entries: %ld\n",
module_name, PTR_ERR(bl_debug_verify_reg_node));
goto out_err;
}
bl_debug_verify_reg_node = debugfs_create_file(gr_file_cpu_bl, S_IRUGO,
bl_debug_node, NULL, &debug_gr_fops_cpu_bl);
if (IS_ERR_OR_NULL(bl_debug_verify_reg_node)) {
pr_err("%s: failed to create debugfs entries: %ld\n",
module_name, PTR_ERR(bl_debug_verify_reg_node));
goto out_err;
}
tegra_bl_mapped_debug_data_start =
phys_to_virt(tegra_bl_debug_data_start);
if (tegra_bl_debug_data_start != 0
&& !pfn_valid(__phys_to_pfn(tegra_bl_debug_data_start))) {
ptr_bl_debug_data_start = ioremap(tegra_bl_debug_data_start,
tegra_bl_debug_data_size);
WARN_ON(!ptr_bl_debug_data_start);
if (!ptr_bl_debug_data_start) {
pr_err("%s: Failed to map tegra_bl_debug_data_start%08x\n",
__func__, (unsigned int)tegra_bl_debug_data_start);
goto out_err;
}
tegra_bl_mapped_boot_cfg_start = (__force void *)ptr_bl_boot_cfg_start;
pr_info("Remapped tegra_bl_debug_data_start(0x%llx)"
" to address(0x%llx), size(0x%llx)\n",
(u64)tegra_bl_debug_data_start,
(__force u64)ptr_bl_debug_data_start,
(u64)tegra_bl_debug_data_size);
tegra_bl_mapped_debug_data_start = (__force void *)ptr_bl_debug_data_start;
}
/*
* The BCP can be optional, so ignore creating if variables are not set
*/
if (tegra_bl_bcp_start && tegra_bl_bcp_size) {
bl_debug_boot_cfg = debugfs_create_file(boot_cfg, 0444,
bl_debug_node, NULL, &boot_cfg_fops);
if (IS_ERR_OR_NULL(bl_debug_boot_cfg)) {
pr_err("%s: failed to create debugfs entries: %ld\n",
__func__, PTR_ERR(bl_debug_boot_cfg));
goto out_err;
}
tegra_bl_mapped_boot_cfg_start =
phys_to_virt(tegra_bl_bcp_start);
if (!pfn_valid(__phys_to_pfn(tegra_bl_bcp_start))) {
ptr_bl_boot_cfg_start = ioremap(tegra_bl_bcp_start,
tegra_bl_bcp_size);
WARN_ON(!ptr_bl_boot_cfg_start);
if (!ptr_bl_boot_cfg_start) {
pr_err("%s: Failed to map tegra_bl_prof_start %08x\n",
__func__,
(unsigned int)tegra_bl_bcp_start);
goto out_err;
}
tegra_bl_mapped_boot_cfg_start =
(__force void *)ptr_bl_boot_cfg_start;
}
}
}
#endif /* CONFIG_DEBUG_FS */