drivers/staging/media/atomisp/pci/runtime/isys/src/isys_stream2mmio_rmgr.c

Source file repositories/reference/linux-study-clean/drivers/staging/media/atomisp/pci/runtime/isys/src/isys_stream2mmio_rmgr.c

File Facts

System
Linux kernel
Corpus path
drivers/staging/media/atomisp/pci/runtime/isys/src/isys_stream2mmio_rmgr.c
Extension
.c
Size
1986 bytes
Lines
80
Domain
Driver Families
Bucket
drivers/staging
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

if (cur_rsrc->num_active < max_sid) {
			for (i = STREAM2MMIO_SID0_ID; i < max_sid; i++) {
				if (bitop_getbit(cur_rsrc->active_table, i) == 0) {
					bitop_setbit(cur_rsrc->active_table, i);
					*sid = i;
					cur_rsrc->num_active++;
					retval = true;
					break;
				}
			}
		}
	}
	return retval;
}

void ia_css_isys_stream2mmio_sid_rmgr_release(
    stream2mmio_ID_t	stream2mmio,
    stream2mmio_sid_ID_t	*sid)
{
	stream2mmio_sid_ID_t max_sid;
	isys_stream2mmio_rsrc_t *cur_rsrc = NULL;

	assert(stream2mmio < N_STREAM2MMIO_ID);
	assert(sid);

	if ((stream2mmio < N_STREAM2MMIO_ID) && (sid)) {
		max_sid = N_STREAM2MMIO_SID_PROCS[stream2mmio];
		cur_rsrc = &isys_stream2mmio_rsrc[stream2mmio];
		if ((*sid < max_sid) && (cur_rsrc->num_active > 0)) {
			if (bitop_getbit(cur_rsrc->active_table, *sid) == 1) {
				bitop_clearbit(cur_rsrc->active_table, *sid);
				cur_rsrc->num_active--;
			}
		}
	}
}

Annotation

Implementation Notes