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ioat: add return code to ioat_process_events()

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This lets us signal an error if the channel is halted in
ioat_process_channel_events().

Change-Id: Iffaf4fd1e27d1254f9d95a37d732ae4a5f3a0465
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
This commit is contained in:
Daniel Verkamp 2015-12-17 10:56:00 -07:00
parent 4662e22a99
commit 0765bba91f
2 changed files with 12 additions and 10 deletions
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6
include/spdk/ioat.h
View File

@ -90,12 +90,14 @@ void ioat_unregister_thread(void);
int64_t ioat_submit_copy(void *cb_arg, ioat_callback_t cb_fn,
void *dst, const void *src, uint64_t nbytes);
/*
/**
* Check for completed requests on the current thread.
*
* Before submitting any requests on a thread, the thread must be registered
* using the \ref ioat_register_thread() function.
*
* \returns 0 on success or negative if something went wrong.
*/
void ioat_process_events(void);
int ioat_process_events(void);
#endif

16
lib/ioat/ioat.c
View File

@ -339,7 +339,7 @@ static int ioat_reset_hw(struct ioat_channel *ioat)
return 0;
}
static void
static int
ioat_process_channel_events(struct ioat_channel *ioat)
{
struct ioat_descriptor *desc;
@ -347,7 +347,7 @@ ioat_process_channel_events(struct ioat_channel *ioat)
uint32_t tail;
if (ioat->head == ioat->tail) {
return;
return 0;
}
status = *ioat->comp_update;
@ -355,12 +355,11 @@ ioat_process_channel_events(struct ioat_channel *ioat)
if (is_ioat_halted(status)) {
ioat_printf(ioat, "%s: Channel halted (%x)\n", __func__, ioat->regs->chanerr);
/* TODO: report error */
return;
return -1;
}
if (completed_descriptor == ioat->last_seen) {
return;
return 0;
}
do {
@ -376,6 +375,7 @@ ioat_process_channel_events(struct ioat_channel *ioat)
} while (hw_desc_phys_addr != completed_descriptor);
ioat->last_seen = hw_desc_phys_addr;
return 0;
}
static int
@ -663,11 +663,11 @@ ioat_submit_copy(void *cb_arg, ioat_callback_t cb_fn,
return nbytes;
}
void ioat_process_events(void)
int ioat_process_events(void)
{
if (!ioat_thread_channel) {
return;
return -1;
}
ioat_process_channel_events(ioat_thread_channel);
return ioat_process_channel_events(ioat_thread_channel);
}