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dmaengine: hisilicon: Disable channels when unregister hisi_dma

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[ Upstream commit e3bdaa04ad ]

When hisi_dma is unloaded or unbinded, all of channels should be
disabled. This patch disables DMA channels when driver is unloaded
or unbinded.

Fixes: e9f08b6525 ("dmaengine: hisilicon: Add Kunpeng DMA engine support")
Signed-off-by: Jie Hai <haijie1@huawei.com>
Acked-by: Zhou Wang <wangzhou1@hisilicon.com>
Link: https://lore.kernel.org/r/20220830062251.52993-2-haijie1@huawei.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jie Hai
2022-08-30 14:22:45 +08:00
committed by Greg Kroah-Hartman
parent f59861946f
commit d5065ca461
1 changed files with 9 additions and 5 deletions
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14
drivers/dma/hisi_dma.c
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@@ -185,7 +185,8 @@ static void hisi_dma_reset_qp_point(struct hisi_dma_dev *hdma_dev, u32 index)
hisi_dma_chan_write(hdma_dev->base, HISI_DMA_CQ_HEAD_PTR, index, 0);
}
static void hisi_dma_reset_hw_chan(struct hisi_dma_chan *chan)
static void hisi_dma_reset_or_disable_hw_chan(struct hisi_dma_chan *chan,
bool disable)
{
struct hisi_dma_dev *hdma_dev = chan->hdma_dev;
u32 index = chan->qp_num, tmp;
@@ -206,8 +207,11 @@ static void hisi_dma_reset_hw_chan(struct hisi_dma_chan *chan)
hisi_dma_do_reset(hdma_dev, index);
hisi_dma_reset_qp_point(hdma_dev, index);
hisi_dma_pause_dma(hdma_dev, index, false);
hisi_dma_enable_dma(hdma_dev, index, true);
hisi_dma_unmask_irq(hdma_dev, index);
if (!disable) {
hisi_dma_enable_dma(hdma_dev, index, true);
hisi_dma_unmask_irq(hdma_dev, index);
}
ret = readl_relaxed_poll_timeout(hdma_dev->base +
HISI_DMA_Q_FSM_STS + index * HISI_DMA_OFFSET, tmp,
@@ -223,7 +227,7 @@ static void hisi_dma_free_chan_resources(struct dma_chan *c)
struct hisi_dma_chan *chan = to_hisi_dma_chan(c);
struct hisi_dma_dev *hdma_dev = chan->hdma_dev;
hisi_dma_reset_hw_chan(chan);
hisi_dma_reset_or_disable_hw_chan(chan, false);
vchan_free_chan_resources(&chan->vc);
memset(chan->sq, 0, sizeof(struct hisi_dma_sqe) * hdma_dev->chan_depth);
@@ -399,7 +403,7 @@ static void hisi_dma_enable_qp(struct hisi_dma_dev *hdma_dev, u32 qp_index)
static void hisi_dma_disable_qp(struct hisi_dma_dev *hdma_dev, u32 qp_index)
{
hisi_dma_reset_hw_chan(&hdma_dev->chan[qp_index]);
hisi_dma_reset_or_disable_hw_chan(&hdma_dev->chan[qp_index], true);
}
static void hisi_dma_enable_qps(struct hisi_dma_dev *hdma_dev)