Re: [PATCH] drm/i915: Fix docbook descriptions for i915_cmd_parser

Maarten Lankhorst
2021-04-21T14:39:19Z

Op 21-04-2021 om 16:32 schreef Daniel Vetter:
> On Wed, Apr 21, 2021 at 2:03 PM Maarten Lankhorst
> <maarten.lankhorst@linux.intel.com> wrote:
>> Fixes the following htmldocs warnings:
>> drivers/gpu/drm/i915/i915_cmd_parser.c:1420: warning: Excess function parameter 'trampoline' description in 'intel_engine_cmd_parser'
>> drivers/gpu/drm/i915/i915_cmd_parser.c:1420: warning: Function parameter or member 'jump_whitelist' not described in 'intel_engine_cmd_parser'
>> drivers/gpu/drm/i915/i915_cmd_parser.c:1420: warning: Function parameter or member 'shadow_map' not described in 'intel_engine_cmd_parser'
>> drivers/gpu/drm/i915/i915_cmd_parser.c:1420: warning: Function parameter or member 'batch_map' not described in 'intel_engine_cmd_parser'
>> drivers/gpu/drm/i915/i915_cmd_parser.c:1420: warning: Excess function parameter 'trampoline' description in 'intel_engine_cmd_parser'
>>
>> Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
>> Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
>> ---
>> drivers/gpu/drm/i915/i915_cmd_parser.c | 16 +++++++++++++++-
>> 1 file changed, 15 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/gpu/drm/i915/i915_cmd_parser.c b/drivers/gpu/drm/i915/i915_cmd_parser.c
>> index e6f1e93abbbb..afb9b7516999 100644
>> --- a/drivers/gpu/drm/i915/i915_cmd_parser.c
>> +++ b/drivers/gpu/drm/i915/i915_cmd_parser.c
>> @@ -1369,6 +1369,18 @@ static int check_bbstart(u32 *cmd, u32 offset, u32 length,
>> return 0;
>> }
>>
>> +/**
>> + * intel_engine_cmd_parser_alloc_jump_whitelist() - preallocate jump whitelist for intel_engine_cmd_parser()
>> + * @batch_length: length of the commands in batch_obj
>> + * @trampoline: Whether jump trampolines are used.
>> + *
>> + * Preallocates a jump whitelist for parsing the cmd buffer in intel_engine_cmd_parser().
>> + * This has to be preallocated, because the command parser runs in signaling context,
>> + * and may not allocate any memory.
>> + *
>> + * Return: NULL or pointer to a jump whitelist, or ERR_PTR() on failure. Use
>> + * IS_ERR() to check for errors. Must bre freed() with kfree().
> IS_ERR_OR_NULL or needs an actual bugfix in the code since we're not
> consistent. Also s/bre/be/
We're sort of consistent, NULL is a valid return code. IS_ERR is only on faliure. :)
> -Daniel
>
>> + */
>> unsigned long *intel_engine_cmd_parser_alloc_jump_whitelist(u32 batch_length,
>> bool trampoline)
>> {
>> @@ -1401,7 +1413,9 @@ unsigned long *intel_engine_cmd_parser_alloc_jump_whitelist(u32 batch_length,
>> * @batch_offset: byte offset in the batch at which execution starts
>> * @batch_length: length of the commands in batch_obj
>> * @shadow: validated copy of the batch buffer in question
>> - * @trampoline: whether to emit a conditional trampoline at the end of the batch
>> + * @jump_whitelist: buffer preallocated with intel_engine_cmd_parser_alloc_jump_whitelist()
>> + * @shadow_map: mapping to @shadow vma
>> + * @batch_map: mapping to @batch vma
>> *
>> * Parses the specified batch buffer looking for privilege violations as
>> * described in the overview.
>> --
>> 2.31.0
>>
>