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APL/CNL: Implement host DMA setting and position update on APL/CNL. 

The host DMA has the different config method:
1. Get DMA channel based on stream tag.
2. Prepare DMA elem list based on local DMA trace buffer which make
sure that one trace record data can be transferred at least.
3. Need start DMA on firmware side before trigger start on kernel side.
4. Because no DMA callback in host DMA, add position update
calling at the end of trace_work().

Signed-off-by: Yan Wang <yan.wang@linux.intel.com>
This commit is contained in:
Yan Wang 2018-03-14 14:51:14 +08:00 committed by Liam Girdwood
parent df7fbb37d9
commit e1604c96a3
1 changed files with 77 additions and 0 deletions
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77
src/lib/dma-trace.c
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@ -120,6 +120,14 @@ out:
spin_unlock_irq(&d->lock, flags);
#if defined CONFIG_DMA_GW
/*
* there isn't DMA completion callback in GW DMA copying
* so we send position IPC message after DMA copying API calling
*/
ipc_dma_trace_send_position();
#endif
/* reschedule the trace copying work */
return DMA_TRACE_PERIOD;
}
@ -195,8 +203,77 @@ int dma_trace_host_buffer(struct dma_trace_data *d, struct dma_sg_elem *elem,
return 0;
}
#if defined CONFIG_DMA_GW
static int dma_trace_start(struct dma_trace_data *d)
{
struct dma_sg_config config;
struct dma_sg_elem *e;
uint32_t elem_size, elem_addr, elem_num;
int err = 0;
int i;
err = dma_copy_set_stream_tag(&d->dc, d->stream_tag);
if (err < 0)
return err;
/* size of every trace record */
elem_size = sizeof(uint64_t) * 2;
/* Initialize address of local elem */
elem_addr = (uint32_t)d->dmatb.addr;
/* the number of elem list */
elem_num = DMA_TRACE_LOCAL_SIZE / elem_size;
config.direction = DMA_DIR_LMEM_TO_HMEM;
config.src_width = sizeof(uint32_t);
config.dest_width = sizeof(uint32_t);
config.cyclic = 0;
list_init(&config.elem_list);
/* generate local elem list for local trace buffer */
e = rzalloc(RZONE_SYS, SOF_MEM_CAPS_RAM, sizeof(*e) * elem_num);
if (!e)
return -ENOMEM;
for (i = 0; i < elem_num; i++) {
e[i].dest = 0;
e[i].src = elem_addr;
e[i].size = elem_size; /* the minimum size of DMA copy */
list_item_append(&e[i].list, &config.elem_list);
elem_addr += elem_size;
}
err = dma_set_config(d->dc.dmac, d->dc.chan, &config);
if (err < 0) {
rfree(e);
return err;
}
err = dma_start(d->dc.dmac, d->dc.chan);
rfree(e);
return err;
}
#endif
int dma_trace_enable(struct dma_trace_data *d)
{
#if defined CONFIG_DMA_GW
int err;
/*
* GW DMA need finish DMA config and start before
* host driver trigger start DMA
*/
err = dma_trace_start(d);
if (err < 0)
return err;
#endif
/* validate DMA context */
if (d->dc.dmac == NULL || d->dc.chan < 0) {
trace_error_atomic(TRACE_CLASS_BUFFER, "eem");