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Add work queue to handle incoming messages. Reviewed-by: Richard Zhu Signed-off-by: Peng Fan --- drivers/remoteproc/imx_rproc.c | 115 ++++++++++++++++++++++++++++++++- 1 file changed, 112 insertions(+), 3 deletions(-) diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c index e62a53ee128e..812b077f1282 100644 --- a/drivers/remoteproc/imx_rproc.c +++ b/drivers/remoteproc/imx_rproc.c @@ -7,6 +7,7 @@ #include #include #include +#include #include #include #include @@ -15,6 +16,9 @@ #include #include #include +#include + +#include "remoteproc_internal.h" #define IMX7D_SRC_SCR 0x0C #define IMX7D_ENABLE_M4 BIT(3) @@ -86,6 +90,11 @@ struct imx_rproc { const struct imx_rproc_dcfg *dcfg; struct imx_rproc_mem mem[IMX7D_RPROC_MEM_MAX]; struct clk *clk; + struct mbox_client cl; + struct mbox_chan *tx_ch; + struct mbox_chan *rx_ch; + struct work_struct rproc_work; + struct workqueue_struct *workqueue; }; static const struct imx_rproc_att imx_rproc_att_imx8mq[] = { @@ -366,9 +375,33 @@ static int imx_rproc_parse_fw(struct rproc *rproc, const struct firmware *fw) return 0; } +static void imx_rproc_kick(struct rproc *rproc, int vqid) +{ + struct imx_rproc *priv = rproc->priv; + int err; + __u32 mmsg; + + if (!priv->tx_ch) { + dev_err(priv->dev, "No initialized mbox tx channel\n"); + return; + } + + /* + * Send the index of the triggered virtqueue as the mu payload. + * Let remote processor know which virtqueue is used. + */ + mmsg = vqid << 16; + + err = mbox_send_message(priv->tx_ch, (void *)&mmsg); + if (err < 0) + dev_err(priv->dev, "%s: failed (%d, err:%d)\n", + __func__, vqid, err); +} + static const struct rproc_ops imx_rproc_ops = { .start = imx_rproc_start, .stop = imx_rproc_stop, + .kick = imx_rproc_kick, .da_to_va = imx_rproc_da_to_va, .load = rproc_elf_load_segments, .parse_fw = imx_rproc_parse_fw, @@ -444,6 +477,65 @@ static int imx_rproc_addr_init(struct imx_rproc *priv, return 0; } +static void imx_rproc_vq_work(struct work_struct *work) +{ + struct imx_rproc *priv = container_of(work, struct imx_rproc, + rproc_work); + + rproc_vq_interrupt(priv->rproc, 0); + rproc_vq_interrupt(priv->rproc, 1); +} + +static void imx_rproc_rx_callback(struct mbox_client *cl, void *msg) +{ + struct rproc *rproc = dev_get_drvdata(cl->dev); + struct imx_rproc *priv = rproc->priv; + + queue_work(priv->workqueue, &priv->rproc_work); +} + +static int imx_rproc_xtr_mbox_init(struct rproc *rproc) +{ + struct imx_rproc *priv = rproc->priv; + struct device *dev = priv->dev; + struct mbox_client *cl; + int ret; + + if (!of_get_property(dev->of_node, "mbox-names", NULL)) + return 0; + + cl = &priv->cl; + cl->dev = dev; + cl->tx_block = true; + cl->tx_tout = 100; + cl->knows_txdone = false; + cl->rx_callback = imx_rproc_rx_callback; + + priv->tx_ch = mbox_request_channel_byname(cl, "tx"); + if (IS_ERR(priv->tx_ch)) { + ret = PTR_ERR(priv->tx_ch); + return dev_err_probe(cl->dev, PTR_ERR(priv->tx_ch), + "failed to request tx mailbox channel: %d\n", ret); + } + + priv->rx_ch = mbox_request_channel_byname(cl, "rx"); + if (IS_ERR(priv->rx_ch)) { + mbox_free_channel(priv->tx_ch); + return dev_err_probe(cl->dev, PTR_ERR(priv->rx_ch), + "failed to request mbox tx chan\n"); + } + + return 0; +} + +static void imx_rproc_free_mbox(struct rproc *rproc) +{ + struct imx_rproc *priv = rproc->priv; + + mbox_free_channel(priv->tx_ch); + mbox_free_channel(priv->rx_ch); +} + static int imx_rproc_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -481,18 +573,28 @@ static int imx_rproc_probe(struct platform_device *pdev) priv->dev = dev; dev_set_drvdata(dev, rproc); + priv->workqueue = create_workqueue(dev_name(dev)); + if (!priv->workqueue) { + dev_err(dev, "cannot create workqueue\n"); + ret = -ENOMEM; + goto err_put_rproc; + } + + ret = imx_rproc_xtr_mbox_init(rproc); + if (ret) + goto err_put_wkq; ret = imx_rproc_addr_init(priv, pdev); if (ret) { dev_err(dev, "failed on imx_rproc_addr_init\n"); - goto err_put_rproc; + goto err_put_mbox; } priv->clk = devm_clk_get(dev, NULL); if (IS_ERR(priv->clk)) { dev_err(dev, "Failed to get clock\n"); ret = PTR_ERR(priv->clk); - goto err_put_rproc; + goto err_put_mbox; } /* @@ -502,9 +604,11 @@ static int imx_rproc_probe(struct platform_device *pdev) ret = clk_prepare_enable(priv->clk); if (ret) { dev_err(&rproc->dev, "Failed to enable clock\n"); - goto err_put_rproc; + goto err_put_mbox; } + INIT_WORK(&(priv->rproc_work), imx_rproc_vq_work); + ret = rproc_add(rproc); if (ret) { dev_err(dev, "rproc_add failed\n"); @@ -515,6 +619,10 @@ static int imx_rproc_probe(struct platform_device *pdev) err_put_clk: clk_disable_unprepare(priv->clk); +err_put_mbox: + imx_rproc_free_mbox(rproc); +err_put_wkq: + destroy_workqueue(priv->workqueue); err_put_rproc: rproc_free(rproc); @@ -527,6 +635,7 @@ static int imx_rproc_remove(struct platform_device *pdev) struct imx_rproc *priv = rproc->priv; clk_disable_unprepare(priv->clk); + imx_rproc_free_mbox(rproc); rproc_del(rproc); rproc_free(rproc);