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firewire: core: add local API to queue work item to workqueue specific to isochronous contexts

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In the previous commit, the workqueue is added per the instance of fw_card
structure for isochronous contexts. The workqueue is designed to be used by
the implementation of fw_card_driver structure underlying the fw_card.

This commit adds some local APIs to be used by the implementation.

Tested-by: Edmund Raile <edmund.raile@protonmail.com>
Link: https://lore.kernel.org/r/20240904125155.461886-3-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
This commit is contained in:
Takashi Sakamoto 2024-09-04 21:51:51 +09:00
parent c6fb88a527
commit 4f55ad754d
3 changed files with 39 additions and 2 deletions
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30
drivers/firewire/core-iso.c
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@ -211,21 +211,47 @@ EXPORT_SYMBOL(fw_iso_context_queue_flush);
int fw_iso_context_flush_completions(struct fw_iso_context *ctx)
{
int err;
trace_isoc_outbound_flush_completions(ctx);
trace_isoc_inbound_single_flush_completions(ctx);
trace_isoc_inbound_multiple_flush_completions(ctx);
return ctx->card->driver->flush_iso_completions(ctx);
might_sleep();
// Avoid dead lock due to programming mistake.
if (WARN_ON(current_work() == &ctx->work))
return 0;
disable_work_sync(&ctx->work);
err = ctx->card->driver->flush_iso_completions(ctx);
enable_work(&ctx->work);
return err;
}
EXPORT_SYMBOL(fw_iso_context_flush_completions);
int fw_iso_context_stop(struct fw_iso_context *ctx)
{
int err;
trace_isoc_outbound_stop(ctx);
trace_isoc_inbound_single_stop(ctx);
trace_isoc_inbound_multiple_stop(ctx);
return ctx->card->driver->stop_iso(ctx);
might_sleep();
// Avoid dead lock due to programming mistake.
if (WARN_ON(current_work() == &ctx->work))
return 0;
err = ctx->card->driver->stop_iso(ctx);
cancel_work_sync(&ctx->work);
return err;
}
EXPORT_SYMBOL(fw_iso_context_stop);

10
drivers/firewire/core.h
View File

@ -159,6 +159,16 @@ int fw_iso_buffer_alloc(struct fw_iso_buffer *buffer, int page_count);
int fw_iso_buffer_map_dma(struct fw_iso_buffer *buffer, struct fw_card *card,
enum dma_data_direction direction);
static inline void fw_iso_context_init_work(struct fw_iso_context *ctx, work_func_t func)
{
INIT_WORK(&ctx->work, func);
}
static inline void fw_iso_context_queue_work(struct fw_iso_context *ctx)
{
queue_work(ctx->card->isoc_wq, &ctx->work);
}
/* -topology */

1
include/linux/firewire.h
View File

@ -511,6 +511,7 @@ union fw_iso_callback {
struct fw_iso_context {
struct fw_card *card;
struct work_struct work;
int type;
int channel;
int speed;