diff options
Diffstat (limited to 'drivers/soc/qcom/apr.c')
| -rw-r--r-- | drivers/soc/qcom/apr.c | 76 |
1 files changed, 70 insertions, 6 deletions
diff --git a/drivers/soc/qcom/apr.c b/drivers/soc/qcom/apr.c index 74f8b9607daa..4fcc32420c47 100644 --- a/drivers/soc/qcom/apr.c +++ b/drivers/soc/qcom/apr.c @@ -8,6 +8,7 @@ #include <linux/spinlock.h> #include <linux/idr.h> #include <linux/slab.h> +#include <linux/workqueue.h> #include <linux/of_device.h> #include <linux/soc/qcom/apr.h> #include <linux/rpmsg.h> @@ -17,8 +18,18 @@ struct apr { struct rpmsg_endpoint *ch; struct device *dev; spinlock_t svcs_lock; + spinlock_t rx_lock; struct idr svcs_idr; int dest_domain_id; + struct workqueue_struct *rxwq; + struct work_struct rx_work; + struct list_head rx_list; +}; + +struct apr_rx_buf { + struct list_head node; + int len; + uint8_t buf[]; }; /** @@ -62,11 +73,7 @@ static int apr_callback(struct rpmsg_device *rpdev, void *buf, int len, void *priv, u32 addr) { struct apr *apr = dev_get_drvdata(&rpdev->dev); - uint16_t hdr_size, msg_type, ver, svc_id; - struct apr_device *svc = NULL; - struct apr_driver *adrv = NULL; - struct apr_resp_pkt resp; - struct apr_hdr *hdr; + struct apr_rx_buf *abuf; unsigned long flags; if (len <= APR_HDR_SIZE) { @@ -75,6 +82,34 @@ static int apr_callback(struct rpmsg_device *rpdev, void *buf, return -EINVAL; } + abuf = kzalloc(sizeof(*abuf) + len, GFP_ATOMIC); + if (!abuf) + return -ENOMEM; + + abuf->len = len; + memcpy(abuf->buf, buf, len); + + spin_lock_irqsave(&apr->rx_lock, flags); + list_add_tail(&abuf->node, &apr->rx_list); + spin_unlock_irqrestore(&apr->rx_lock, flags); + + queue_work(apr->rxwq, &apr->rx_work); + + return 0; +} + + +static int apr_do_rx_callback(struct apr *apr, struct apr_rx_buf *abuf) +{ + uint16_t hdr_size, msg_type, ver, svc_id; + struct apr_device *svc = NULL; + struct apr_driver *adrv = NULL; + struct apr_resp_pkt resp; + struct apr_hdr *hdr; + unsigned long flags; + void *buf = abuf->buf; + int len = abuf->len; + hdr = buf; ver = APR_HDR_FIELD_VER(hdr->hdr_field); if (ver > APR_PKT_VER + 1) @@ -132,6 +167,23 @@ static int apr_callback(struct rpmsg_device *rpdev, void *buf, return 0; } +static void apr_rxwq(struct work_struct *work) +{ + struct apr *apr = container_of(work, struct apr, rx_work); + struct apr_rx_buf *abuf, *b; + unsigned long flags; + + if (!list_empty(&apr->rx_list)) { + list_for_each_entry_safe(abuf, b, &apr->rx_list, node) { + apr_do_rx_callback(apr, abuf); + spin_lock_irqsave(&apr->rx_lock, flags); + list_del(&abuf->node); + spin_unlock_irqrestore(&apr->rx_lock, flags); + kfree(abuf); + } + } +} + static int apr_device_match(struct device *dev, struct device_driver *drv) { struct apr_device *adev = to_apr_device(dev); @@ -276,7 +328,7 @@ static int apr_probe(struct rpmsg_device *rpdev) if (!apr) return -ENOMEM; - ret = of_property_read_u32(dev->of_node, "reg", &apr->dest_domain_id); + ret = of_property_read_u32(dev->of_node, "qcom,apr-domain", &apr->dest_domain_id); if (ret) { dev_err(dev, "APR Domain ID not specified in DT\n"); return ret; @@ -285,6 +337,14 @@ static int apr_probe(struct rpmsg_device *rpdev) dev_set_drvdata(dev, apr); apr->ch = rpdev->ept; apr->dev = dev; + apr->rxwq = create_singlethread_workqueue("qcom_apr_rx"); + if (!apr->rxwq) { + dev_err(apr->dev, "Failed to start Rx WQ\n"); + return -ENOMEM; + } + INIT_WORK(&apr->rx_work, apr_rxwq); + INIT_LIST_HEAD(&apr->rx_list); + spin_lock_init(&apr->rx_lock); spin_lock_init(&apr->svcs_lock); idr_init(&apr->svcs_idr); of_register_apr_devices(dev); @@ -303,7 +363,11 @@ static int apr_remove_device(struct device *dev, void *null) static void apr_remove(struct rpmsg_device *rpdev) { + struct apr *apr = dev_get_drvdata(&rpdev->dev); + device_for_each_child(&rpdev->dev, NULL, apr_remove_device); + flush_workqueue(apr->rxwq); + destroy_workqueue(apr->rxwq); } /* |