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Commit 308136d1 authored by Dan Williams's avatar Dan Williams
Browse files

iop-adma: implement a private tx_list 


    
Drop iop-adma's use of tx_list from struct dma_async_tx_descriptor in
preparation for removal of this field.

Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent eda34234

arch/arm/include/asm/hardware/iop_adma.h

+2 −0
Original line number Diff line number Diff line
@@ -86,6 +86,7 @@ struct iop_adma_chan { 
 * @idx: pool index

 * @unmap_src_cnt: number of xor sources

 * @unmap_len: transaction bytecount

 * @tx_list: list of descriptors that are associated with one operation

 * @async_tx: support for the async_tx api

 * @group_list: list of slots that make up a multi-descriptor transaction

 *	for example transfer lengths larger than the supported hw max
@@ -102,6 +103,7 @@ struct iop_adma_desc_slot { 
	u16 idx;

	u16 unmap_src_cnt;

	size_t unmap_len;

	struct list_head tx_list;

	struct dma_async_tx_descriptor async_tx;

	union {

		u32 *xor_check_result;

drivers/dma/iop-adma.c

+5 −4
Original line number Diff line number Diff line
@@ -370,7 +370,7 @@ iop_adma_alloc_slots(struct iop_adma_chan *iop_chan, int num_slots, 
			}

			alloc_tail->group_head = alloc_start;

			alloc_tail->async_tx.cookie = -EBUSY;

			list_splice(&chain, &alloc_tail->async_tx.tx_list);

			list_splice(&chain, &alloc_tail->tx_list);

			iop_chan->last_used = last_used;

			iop_desc_clear_next_desc(alloc_start);

			iop_desc_clear_next_desc(alloc_tail);
@@ -429,7 +429,7 @@ iop_adma_tx_submit(struct dma_async_tx_descriptor *tx) 


	old_chain_tail = list_entry(iop_chan->chain.prev,

		struct iop_adma_desc_slot, chain_node);

	list_splice_init(&sw_desc->async_tx.tx_list,

	list_splice_init(&sw_desc->tx_list,

			 &old_chain_tail->chain_node);



	/* fix up the hardware chain */
@@ -496,6 +496,7 @@ static int iop_adma_alloc_chan_resources(struct dma_chan *chan) 


		dma_async_tx_descriptor_init(&slot->async_tx, chan);

		slot->async_tx.tx_submit = iop_adma_tx_submit;

		INIT_LIST_HEAD(&slot->tx_list);

		INIT_LIST_HEAD(&slot->chain_node);

		INIT_LIST_HEAD(&slot->slot_node);

		hw_desc = (char *) iop_chan->device->dma_desc_pool;
@@ -1296,7 +1297,7 @@ static void iop_chan_start_null_memcpy(struct iop_adma_chan *iop_chan) 
	if (sw_desc) {

		grp_start = sw_desc->group_head;



		list_splice_init(&sw_desc->async_tx.tx_list, &iop_chan->chain);

		list_splice_init(&sw_desc->tx_list, &iop_chan->chain);

		async_tx_ack(&sw_desc->async_tx);

		iop_desc_init_memcpy(grp_start, 0);

		iop_desc_set_byte_count(grp_start, iop_chan, 0);
@@ -1352,7 +1353,7 @@ static void iop_chan_start_null_xor(struct iop_adma_chan *iop_chan) 
	sw_desc = iop_adma_alloc_slots(iop_chan, slot_cnt, slots_per_op);

	if (sw_desc) {

		grp_start = sw_desc->group_head;

		list_splice_init(&sw_desc->async_tx.tx_list, &iop_chan->chain);

		list_splice_init(&sw_desc->tx_list, &iop_chan->chain);

		async_tx_ack(&sw_desc->async_tx);

		iop_desc_init_null_xor(grp_start, 2, 0);

		iop_desc_set_byte_count(grp_start, iop_chan, 0);