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dmaengine: PL08x: convert to use vchan submitted/issued lists
Convert to use the virtual dma channel submitted/issued descriptor lists rather than our own private lists, and use the virtual dma channel support functions to manage these lists. Acked-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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parent
083be28a10
commit
879f127bb2
1 changed files with 17 additions and 47 deletions
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@ -215,8 +215,6 @@ enum pl08x_dma_chan_state {
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* @name: name of channel
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* @cd: channel platform data
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* @runtime_addr: address for RX/TX according to the runtime config
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* @pend_list: queued transactions pending on this channel
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* @issued_list: issued transactions for this channel
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* @done_list: list of completed transactions
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* @at: active transaction on this channel
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* @lock: a lock for this channel data
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@ -233,8 +231,6 @@ struct pl08x_dma_chan {
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const char *name;
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const struct pl08x_channel_data *cd;
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struct dma_slave_config cfg;
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struct list_head pend_list;
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struct list_head issued_list;
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struct list_head done_list;
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struct pl08x_txd *at;
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struct pl08x_driver_data *host;
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@ -357,12 +353,12 @@ static void pl08x_start_next_txd(struct pl08x_dma_chan *plchan)
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{
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struct pl08x_driver_data *pl08x = plchan->host;
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struct pl08x_phy_chan *phychan = plchan->phychan;
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struct virt_dma_desc *vd = vchan_next_desc(&plchan->vc);
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struct pl08x_txd *txd = to_pl08x_txd(&vd->tx);
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struct pl08x_lli *lli;
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struct pl08x_txd *txd;
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u32 val;
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txd = list_first_entry(&plchan->issued_list, struct pl08x_txd, node);
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list_del(&txd->node);
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list_del(&txd->vd.node);
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plchan->at = txd;
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@ -524,18 +520,18 @@ static u32 pl08x_getbytes_chan(struct pl08x_dma_chan *plchan)
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}
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/* Sum up all queued transactions */
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if (!list_empty(&plchan->issued_list)) {
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if (!list_empty(&plchan->vc.desc_issued)) {
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struct pl08x_txd *txdi;
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list_for_each_entry(txdi, &plchan->issued_list, node) {
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list_for_each_entry(txdi, &plchan->vc.desc_issued, vd.node) {
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struct pl08x_sg *dsg;
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list_for_each_entry(dsg, &txd->dsg_list, node)
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bytes += dsg->len;
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}
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}
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if (!list_empty(&plchan->pend_list)) {
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if (!list_empty(&plchan->vc.desc_submitted)) {
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struct pl08x_txd *txdi;
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list_for_each_entry(txdi, &plchan->pend_list, node) {
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list_for_each_entry(txdi, &plchan->vc.desc_submitted, vd.node) {
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struct pl08x_sg *dsg;
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list_for_each_entry(dsg, &txd->dsg_list, node)
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bytes += dsg->len;
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@ -1094,13 +1090,12 @@ static void pl08x_free_txd_list(struct pl08x_driver_data *pl08x,
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LIST_HEAD(head);
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struct pl08x_txd *txd;
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list_splice_tail_init(&plchan->issued_list, &head);
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list_splice_tail_init(&plchan->pend_list, &head);
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vchan_get_all_descriptors(&plchan->vc, &head);
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while (!list_empty(&head)) {
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txd = list_first_entry(&head, struct pl08x_txd, node);
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txd = list_first_entry(&head, struct pl08x_txd, vd.node);
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pl08x_release_mux(plchan);
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list_del(&txd->node);
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list_del(&txd->vd.node);
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pl08x_free_txd(pl08x, txd);
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}
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}
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@ -1117,23 +1112,6 @@ static void pl08x_free_chan_resources(struct dma_chan *chan)
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{
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}
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static dma_cookie_t pl08x_tx_submit(struct dma_async_tx_descriptor *tx)
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{
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struct pl08x_dma_chan *plchan = to_pl08x_chan(tx->chan);
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struct pl08x_txd *txd = to_pl08x_txd(tx);
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unsigned long flags;
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dma_cookie_t cookie;
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spin_lock_irqsave(&plchan->vc.lock, flags);
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cookie = dma_cookie_assign(tx);
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/* Put this onto the pending list */
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list_add_tail(&txd->node, &plchan->pend_list);
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spin_unlock_irqrestore(&plchan->vc.lock, flags);
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return cookie;
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}
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static struct dma_async_tx_descriptor *pl08x_prep_dma_interrupt(
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struct dma_chan *chan, unsigned long flags)
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{
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@ -1318,8 +1296,7 @@ static void pl08x_issue_pending(struct dma_chan *chan)
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unsigned long flags;
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spin_lock_irqsave(&plchan->vc.lock, flags);
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list_splice_tail_init(&plchan->pend_list, &plchan->issued_list);
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if (!list_empty(&plchan->issued_list)) {
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if (vchan_issue_pending(&plchan->vc)) {
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if (!plchan->phychan && plchan->state != PL08X_CHAN_WAITING)
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pl08x_phy_alloc_and_start(plchan);
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}
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@ -1345,16 +1322,11 @@ static int pl08x_prep_channel_resources(struct pl08x_dma_chan *plchan,
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return 0;
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}
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static struct pl08x_txd *pl08x_get_txd(struct pl08x_dma_chan *plchan,
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unsigned long flags)
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static struct pl08x_txd *pl08x_get_txd(struct pl08x_dma_chan *plchan)
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{
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struct pl08x_txd *txd = kzalloc(sizeof(*txd), GFP_NOWAIT);
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if (txd) {
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dma_async_tx_descriptor_init(&txd->vd.tx, &plchan->vc.chan);
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txd->vd.tx.flags = flags;
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txd->vd.tx.tx_submit = pl08x_tx_submit;
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INIT_LIST_HEAD(&txd->node);
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INIT_LIST_HEAD(&txd->dsg_list);
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/* Always enable error and terminal interrupts */
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@ -1377,7 +1349,7 @@ static struct dma_async_tx_descriptor *pl08x_prep_dma_memcpy(
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struct pl08x_sg *dsg;
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int ret;
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txd = pl08x_get_txd(plchan, flags);
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txd = pl08x_get_txd(plchan);
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if (!txd) {
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dev_err(&pl08x->adev->dev,
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"%s no memory for descriptor\n", __func__);
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@ -1413,7 +1385,7 @@ static struct dma_async_tx_descriptor *pl08x_prep_dma_memcpy(
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if (ret)
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return NULL;
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return &txd->vd.tx;
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return vchan_tx_prep(&plchan->vc, &txd->vd, flags);
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}
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static struct dma_async_tx_descriptor *pl08x_prep_slave_sg(
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@ -1435,7 +1407,7 @@ static struct dma_async_tx_descriptor *pl08x_prep_slave_sg(
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dev_dbg(&pl08x->adev->dev, "%s prepare transaction of %d bytes from %s\n",
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__func__, sg_dma_len(sgl), plchan->name);
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txd = pl08x_get_txd(plchan, flags);
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txd = pl08x_get_txd(plchan);
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if (!txd) {
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dev_err(&pl08x->adev->dev, "%s no txd\n", __func__);
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return NULL;
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@ -1529,7 +1501,7 @@ static struct dma_async_tx_descriptor *pl08x_prep_slave_sg(
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if (ret)
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return NULL;
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return &txd->vd.tx;
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return vchan_tx_prep(&plchan->vc, &txd->vd, flags);
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}
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static int pl08x_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
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@ -1739,7 +1711,7 @@ static irqreturn_t pl08x_irq(int irq, void *dev)
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* And start the next descriptor (if any),
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* otherwise free this channel.
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*/
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if (!list_empty(&plchan->issued_list))
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if (vchan_next_desc(&plchan->vc))
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pl08x_start_next_txd(plchan);
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else
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pl08x_phy_free(plchan);
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@ -1807,8 +1779,6 @@ static int pl08x_dma_init_virtual_channels(struct pl08x_driver_data *pl08x,
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"initialize virtual channel \"%s\"\n",
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chan->name);
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INIT_LIST_HEAD(&chan->pend_list);
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INIT_LIST_HEAD(&chan->issued_list);
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INIT_LIST_HEAD(&chan->done_list);
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tasklet_init(&chan->tasklet, pl08x_tasklet,
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(unsigned long) chan);
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