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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Use virtio/mailbox to build connection between Remote Proccessors and Linux. Add delayed work to handle incoming messages. Reviewed-by: Richard Zhu Signed-off-by: Peng Fan --- drivers/remoteproc/imx_rproc.c | 102 +++++++++++++++++++++++++++++++++++++++-- 1 file changed, 99 insertions(+), 3 deletions(-) diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c index 03382290d6a5..a8ce97c04e1e 100644 --- a/drivers/remoteproc/imx_rproc.c +++ b/drivers/remoteproc/imx_rproc.c @@ -8,6 +8,7 @@ #include #include #include +#include #include #include #include @@ -91,6 +92,10 @@ struct imx_rproc { struct imx_rproc_mem mem[IMX7D_RPROC_MEM_MAX]; struct clk *clk; void *rsc_va; + struct mbox_client cl; + struct mbox_chan *tx_ch; + struct mbox_chan *rx_ch; + struct delayed_work rproc_work; }; static const struct imx_rproc_att imx_rproc_att_imx8mq[] = { @@ -452,9 +457,25 @@ static int imx_rproc_elf_load_segments(struct rproc *rproc, const struct firmwar return ret; } +static void imx_rproc_kick(struct rproc *rproc, int vqid) +{ + struct imx_rproc *priv = rproc->priv; + int err; + __u32 mmsg; + + mmsg = vqid << 16; + + priv->cl.tx_tout = 20; + 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 = imx_rproc_elf_load_segments, .parse_fw = imx_rproc_parse_fw, @@ -527,6 +548,67 @@ static int imx_rproc_addr_init(struct imx_rproc *priv, return 0; } +static void imx_rproc_vq_work(struct work_struct *work) +{ + struct delayed_work *dwork = to_delayed_work(work); + struct imx_rproc *priv = container_of(dwork, 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; + + schedule_delayed_work(&(priv->rproc_work), 0); +} + +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 = 0; + + cl = &priv->cl; + cl->dev = dev; + cl->tx_block = true; + cl->tx_tout = 20; + 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)) { + if (PTR_ERR(priv->tx_ch) == -EPROBE_DEFER) + return -EPROBE_DEFER; + ret = PTR_ERR(priv->tx_ch); + dev_dbg(cl->dev, "failed to request mbox tx chan, ret %d\n", + ret); + goto err_out; + } + + priv->rx_ch = mbox_request_channel_byname(cl, "rx"); + if (IS_ERR(priv->rx_ch)) { + ret = PTR_ERR(priv->rx_ch); + dev_dbg(cl->dev, "failed to request mbox rx chan, ret %d\n", + ret); + goto err_out; + } + + return ret; + +err_out: + if (!IS_ERR(priv->tx_ch)) + mbox_free_channel(priv->tx_ch); + if (!IS_ERR(priv->rx_ch)) + mbox_free_channel(priv->rx_ch); + + return ret; +} + static int imx_rproc_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -566,17 +648,24 @@ static int imx_rproc_probe(struct platform_device *pdev) dev_set_drvdata(dev, rproc); + ret = imx_rproc_xtr_mbox_init(rproc); + if (ret) { + if (ret == -EPROBE_DEFER) + goto err_put_rproc; + /* mbox is optional, so not fail here */ + } + 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_optional(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; } /* @@ -586,9 +675,11 @@ 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_DELAYED_WORK(&(priv->rproc_work), imx_rproc_vq_work); + ret = rproc_add(rproc); if (ret) { dev_err(dev, "rproc_add failed\n"); @@ -599,6 +690,11 @@ static int imx_rproc_probe(struct platform_device *pdev) err_put_clk: clk_disable_unprepare(priv->clk); +err_put_mbox: + if (!IS_ERR(priv->tx_ch)) + mbox_free_channel(priv->tx_ch); + if (!IS_ERR(priv->rx_ch)) + mbox_free_channel(priv->rx_ch); err_put_rproc: rproc_free(rproc); -- 2.16.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel