1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
51 	dbdma_channel_t *channel = (dbdma_channel_t *)(chan);  in dbdma_phys_callback()  local
53 	channel->sc_slots_pa = segs[0].ds_addr;  in dbdma_phys_callback()
54 	dbdma_write_reg(channel, CHAN_CMDPTR, channel->sc_slots_pa);  in dbdma_phys_callback()
62 	dbdma_channel_t *channel;  in dbdma_allocate_channel()  local
64 	channel = *chan = malloc(sizeof(struct dbdma_channel), M_DBDMA,   in dbdma_allocate_channel()
67 	channel->sc_regs = dbdma_regs;  in dbdma_allocate_channel()
68 	channel->sc_off = offset;  in dbdma_allocate_channel()
69 	dbdma_stop(channel);  in dbdma_allocate_channel()
71 	channel->sc_slots_pa = 0;  in dbdma_allocate_channel()
75 	    NULL, &(channel->sc_dmatag));  in dbdma_allocate_channel()
77 	error = bus_dmamem_alloc(channel->sc_dmatag,  in dbdma_allocate_channel()
78 	    (void **)&channel->sc_slots, BUS_DMA_WAITOK | BUS_DMA_ZERO,  in dbdma_allocate_channel()
79 	    &channel->sc_dmamap);  in dbdma_allocate_channel()
81 	error = bus_dmamap_load(channel->sc_dmatag, channel->sc_dmamap,  in dbdma_allocate_channel()
82 	    channel->sc_slots, PAGE_SIZE, dbdma_phys_callback, channel, 0);  in dbdma_allocate_channel()
84 	dbdma_write_reg(channel, CHAN_CMDPTR_HI, 0);  in dbdma_allocate_channel()
86 	channel->sc_nslots = slots;  in dbdma_allocate_channel()
96 		return (-1);  in dbdma_resize_channel()
98 	chan->sc_nslots = newslots;  in dbdma_resize_channel()
108 	bus_dmamem_free(chan->sc_dmatag, chan->sc_slots, chan->sc_dmamap);  in dbdma_free_channel()
109 	bus_dma_tag_destroy(chan->sc_dmatag);  in dbdma_free_channel()
120 	bus_dmamap_sync(chan->sc_dmatag, chan->sc_dmamap, BUS_DMASYNC_POSTREAD);  in dbdma_get_cmd_status()
124 	 * account for the quad-word little endian fields.  in dbdma_get_cmd_status()
126 	return (le16toh(chan->sc_slots[slot].resCount));  in dbdma_get_cmd_status()
133 	chan->sc_slots[slot].resCount = 0;  in dbdma_clear_cmd_status()
140 	bus_dmamap_sync(chan->sc_dmatag, chan->sc_dmamap, BUS_DMASYNC_POSTREAD);  in dbdma_get_residuals()
142 	return (le16toh(chan->sc_slots[slot].xferStatus));  in dbdma_get_residuals()
211 	cmd = chan->sc_slots_pa + slot * sizeof(struct dbdma_command);  in dbdma_set_current_cmd()
294 		cmd.cmdDep = chan->sc_slots_pa +   in dbdma_insert_command()
303 	 * Move quadwords to little-endian. God only knows why  in dbdma_insert_command()
311 	chan->sc_slots[slot] = cmd;  in dbdma_insert_command()
342 	bus_dmamap_sync(chan->sc_dmatag, chan->sc_dmamap, op);  in dbdma_sync_commands()
349 	chan->sc_saved_regs[0] = dbdma_read_reg(chan, CHAN_CMDPTR);  in dbdma_save_state()
350 	chan->sc_saved_regs[1] = dbdma_read_reg(chan, CHAN_CMDPTR_HI);  in dbdma_save_state()
351 	chan->sc_saved_regs[2] = dbdma_read_reg(chan, CHAN_INTR_SELECT);  in dbdma_save_state()
352 	chan->sc_saved_regs[3] = dbdma_read_reg(chan, CHAN_BRANCH_SELECT);  in dbdma_save_state()
353 	chan->sc_saved_regs[4] = dbdma_read_reg(chan, CHAN_WAIT_SELECT);  in dbdma_save_state()
363 	dbdma_write_reg(chan, CHAN_CMDPTR, chan->sc_saved_regs[0]);  in dbdma_restore_state()
364 	dbdma_write_reg(chan, CHAN_CMDPTR_HI, chan->sc_saved_regs[1]);  in dbdma_restore_state()
365 	dbdma_write_reg(chan, CHAN_INTR_SELECT, chan->sc_saved_regs[2]);  in dbdma_restore_state()
366 	dbdma_write_reg(chan, CHAN_BRANCH_SELECT, chan->sc_saved_regs[3]);  in dbdma_restore_state()
367 	dbdma_write_reg(chan, CHAN_WAIT_SELECT, chan->sc_saved_regs[4]);  in dbdma_restore_state()
374 	return (bus_read_4(chan->sc_regs, chan->sc_off + offset));  in dbdma_read_reg()
381 	bus_write_4(chan->sc_regs, chan->sc_off + offset, val);  in dbdma_write_reg()