diff options
Diffstat (limited to 'drivers/firmware/arm_scmi/driver.c')
| -rw-r--r-- | drivers/firmware/arm_scmi/driver.c | 180 |
1 files changed, 90 insertions, 90 deletions
diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c index ccbe34da801a..8bd350b1e108 100644 --- a/drivers/firmware/arm_scmi/driver.c +++ b/drivers/firmware/arm_scmi/driver.c @@ -198,44 +198,6 @@ static void scmi_fetch_response(struct scmi_xfer *xfer, } /** - * scmi_rx_callback() - mailbox client callback for receive messages - * - * @cl: client pointer - * @m: mailbox message - * - * Processes one received message to appropriate transfer information and - * signals completion of the transfer. - * - * NOTE: This function will be invoked in IRQ context, hence should be - * as optimal as possible. - */ -static void scmi_rx_callback(struct mbox_client *cl, void *m) -{ - u16 xfer_id; - struct scmi_xfer *xfer; - struct scmi_chan_info *cinfo = client_to_scmi_chan_info(cl); - struct device *dev = cinfo->dev; - struct scmi_info *info = handle_to_scmi_info(cinfo->handle); - struct scmi_xfers_info *minfo = &info->minfo; - struct scmi_shared_mem __iomem *mem = cinfo->payload; - - xfer_id = MSG_XTRACT_TOKEN(ioread32(&mem->msg_header)); - - /* Are we even expecting this? */ - if (!test_bit(xfer_id, minfo->xfer_alloc_table)) { - dev_err(dev, "message for %d is not expected!\n", xfer_id); - return; - } - - xfer = &minfo->xfer_block[xfer_id]; - - scmi_dump_header_dbg(dev, &xfer->hdr); - - scmi_fetch_response(xfer, mem); - complete(&xfer->done); -} - -/** * pack_scmi_header() - packs and returns 32-bit header * * @hdr: pointer to header containing all the information on message id, @@ -349,6 +311,44 @@ void scmi_xfer_put(const struct scmi_handle *handle, struct scmi_xfer *xfer) spin_unlock_irqrestore(&minfo->xfer_lock, flags); } +/** + * scmi_rx_callback() - mailbox client callback for receive messages + * + * @cl: client pointer + * @m: mailbox message + * + * Processes one received message to appropriate transfer information and + * signals completion of the transfer. + * + * NOTE: This function will be invoked in IRQ context, hence should be + * as optimal as possible. + */ +static void scmi_rx_callback(struct mbox_client *cl, void *m) +{ + u16 xfer_id; + struct scmi_xfer *xfer; + struct scmi_chan_info *cinfo = client_to_scmi_chan_info(cl); + struct device *dev = cinfo->dev; + struct scmi_info *info = handle_to_scmi_info(cinfo->handle); + struct scmi_xfers_info *minfo = &info->minfo; + struct scmi_shared_mem __iomem *mem = cinfo->payload; + + xfer_id = MSG_XTRACT_TOKEN(ioread32(&mem->msg_header)); + + /* Are we even expecting this? */ + if (!test_bit(xfer_id, minfo->xfer_alloc_table)) { + dev_err(dev, "message for %d is not expected!\n", xfer_id); + return; + } + + xfer = &minfo->xfer_block[xfer_id]; + + scmi_dump_header_dbg(dev, &xfer->hdr); + + scmi_fetch_response(xfer, mem); + complete(&xfer->done); +} + static bool scmi_xfer_poll_done(const struct scmi_chan_info *cinfo, struct scmi_xfer *xfer) { @@ -599,20 +599,6 @@ int scmi_handle_put(const struct scmi_handle *handle) return 0; } -static const struct scmi_desc scmi_generic_desc = { - .max_rx_timeout_ms = 30, /* We may increase this if required */ - .max_msg = 20, /* Limited by MBOX_TX_QUEUE_LEN */ - .max_msg_size = 128, -}; - -/* Each compatible listed below must have descriptor associated with it */ -static const struct of_device_id scmi_of_match[] = { - { .compatible = "arm,scmi", .data = &scmi_generic_desc }, - { /* Sentinel */ }, -}; - -MODULE_DEVICE_TABLE(of, scmi_of_match); - static int scmi_xfer_info_init(struct scmi_info *sinfo) { int i; @@ -659,44 +645,6 @@ static int scmi_mailbox_check(struct device_node *np) return of_parse_phandle_with_args(np, "mboxes", "#mbox-cells", 0, NULL); } -static int scmi_mbox_free_channel(int id, void *p, void *data) -{ - struct scmi_chan_info *cinfo = p; - struct idr *idr = data; - - if (!IS_ERR_OR_NULL(cinfo->chan)) { - mbox_free_channel(cinfo->chan); - cinfo->chan = NULL; - } - - idr_remove(idr, id); - - return 0; -} - -static int scmi_remove(struct platform_device *pdev) -{ - int ret = 0; - struct scmi_info *info = platform_get_drvdata(pdev); - struct idr *idr = &info->tx_idr; - - mutex_lock(&scmi_list_mutex); - if (info->users) - ret = -EBUSY; - else - list_del(&info->node); - mutex_unlock(&scmi_list_mutex); - - if (ret) - return ret; - - /* Safe to free channels since no more users */ - ret = idr_for_each(idr, scmi_mbox_free_channel, idr); - idr_destroy(&info->tx_idr); - - return ret; -} - static inline int scmi_mbox_chan_setup(struct scmi_info *info, struct device *dev, int prot_id) { @@ -856,6 +804,58 @@ static int scmi_probe(struct platform_device *pdev) return 0; } +static int scmi_mbox_free_channel(int id, void *p, void *data) +{ + struct scmi_chan_info *cinfo = p; + struct idr *idr = data; + + if (!IS_ERR_OR_NULL(cinfo->chan)) { + mbox_free_channel(cinfo->chan); + cinfo->chan = NULL; + } + + idr_remove(idr, id); + + return 0; +} + +static int scmi_remove(struct platform_device *pdev) +{ + int ret = 0; + struct scmi_info *info = platform_get_drvdata(pdev); + struct idr *idr = &info->tx_idr; + + mutex_lock(&scmi_list_mutex); + if (info->users) + ret = -EBUSY; + else + list_del(&info->node); + mutex_unlock(&scmi_list_mutex); + + if (ret) + return ret; + + /* Safe to free channels since no more users */ + ret = idr_for_each(idr, scmi_mbox_free_channel, idr); + idr_destroy(&info->tx_idr); + + return ret; +} + +static const struct scmi_desc scmi_generic_desc = { + .max_rx_timeout_ms = 30, /* We may increase this if required */ + .max_msg = 20, /* Limited by MBOX_TX_QUEUE_LEN */ + .max_msg_size = 128, +}; + +/* Each compatible listed below must have descriptor associated with it */ +static const struct of_device_id scmi_of_match[] = { + { .compatible = "arm,scmi", .data = &scmi_generic_desc }, + { /* Sentinel */ }, +}; + +MODULE_DEVICE_TABLE(of, scmi_of_match); + static struct platform_driver scmi_driver = { .driver = { .name = "arm-scmi", |