From afd356dfb3a4127b61a3519802a4db9046703724 Mon Sep 17 00:00:00 2001 From: Bjorn Andersson Date: Mon, 28 Mar 2016 21:35:23 -0700 Subject: [PATCH 1/2] soc: qcom: smem: Use write-combine remap for SMEM Mapping the SMEM region as write combine makes the contiguous writes in SMD perform better and also allows us to do unaligned read and writes on ARM64. Signed-off-by: Bjorn Andersson Reviewed-by: Andy Gross Signed-off-by: Andy Gross --- drivers/soc/qcom/smem.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/soc/qcom/smem.c b/drivers/soc/qcom/smem.c index 19019aa092e8..2e1aa9f130f4 100644 --- a/drivers/soc/qcom/smem.c +++ b/drivers/soc/qcom/smem.c @@ -684,8 +684,7 @@ static int qcom_smem_map_memory(struct qcom_smem *smem, struct device *dev, smem->regions[i].aux_base = (u32)r.start; smem->regions[i].size = resource_size(&r); - smem->regions[i].virt_base = devm_ioremap_nocache(dev, r.start, - resource_size(&r)); + smem->regions[i].virt_base = devm_ioremap_wc(dev, r.start, resource_size(&r)); if (!smem->regions[i].virt_base) return -ENOMEM; From b853cb9628bfbcc4017da46d5f5b46e3eba9d8c6 Mon Sep 17 00:00:00 2001 From: Bjorn Andersson Date: Mon, 28 Mar 2016 21:35:22 -0700 Subject: [PATCH 2/2] soc: qcom: smd: Make callback pass channel reference By passing the smd channel reference to the callback, rather than the smd device, we can open additional smd channels from sub-devices of smd devices. Also updates the two smd clients today found in mainline. Signed-off-by: Bjorn Andersson Signed-off-by: Andy Gross --- drivers/soc/qcom/smd-rpm.c | 9 ++++++--- drivers/soc/qcom/smd.c | 22 ++++++++++++++++++---- drivers/soc/qcom/wcnss_ctrl.c | 8 ++++---- include/linux/soc/qcom/smd.h | 7 +++++-- 4 files changed, 33 insertions(+), 13 deletions(-) diff --git a/drivers/soc/qcom/smd-rpm.c b/drivers/soc/qcom/smd-rpm.c index 731fa066f712..6609d7e0edb0 100644 --- a/drivers/soc/qcom/smd-rpm.c +++ b/drivers/soc/qcom/smd-rpm.c @@ -33,6 +33,7 @@ */ struct qcom_smd_rpm { struct qcom_smd_channel *rpm_channel; + struct device *dev; struct completion ack; struct mutex lock; @@ -149,14 +150,14 @@ int qcom_rpm_smd_write(struct qcom_smd_rpm *rpm, } EXPORT_SYMBOL(qcom_rpm_smd_write); -static int qcom_smd_rpm_callback(struct qcom_smd_device *qsdev, +static int qcom_smd_rpm_callback(struct qcom_smd_channel *channel, const void *data, size_t count) { const struct qcom_rpm_header *hdr = data; size_t hdr_length = le32_to_cpu(hdr->length); const struct qcom_rpm_message *msg; - struct qcom_smd_rpm *rpm = dev_get_drvdata(&qsdev->dev); + struct qcom_smd_rpm *rpm = qcom_smd_get_drvdata(channel); const u8 *buf = data + sizeof(struct qcom_rpm_header); const u8 *end = buf + hdr_length; char msgbuf[32]; @@ -165,7 +166,7 @@ static int qcom_smd_rpm_callback(struct qcom_smd_device *qsdev, if (le32_to_cpu(hdr->service_type) != RPM_SERVICE_TYPE_REQUEST || hdr_length < sizeof(struct qcom_rpm_message)) { - dev_err(&qsdev->dev, "invalid request\n"); + dev_err(rpm->dev, "invalid request\n"); return 0; } @@ -206,7 +207,9 @@ static int qcom_smd_rpm_probe(struct qcom_smd_device *sdev) mutex_init(&rpm->lock); init_completion(&rpm->ack); + rpm->dev = &sdev->dev; rpm->rpm_channel = sdev->channel; + qcom_smd_set_drvdata(sdev->channel, rpm); dev_set_drvdata(&sdev->dev, rpm); diff --git a/drivers/soc/qcom/smd.c b/drivers/soc/qcom/smd.c index b6434c4be86a..ac1957dfdf24 100644 --- a/drivers/soc/qcom/smd.c +++ b/drivers/soc/qcom/smd.c @@ -194,6 +194,8 @@ struct qcom_smd_channel { int pkt_size; + void *drvdata; + struct list_head list; struct list_head dev_list; }; @@ -513,7 +515,6 @@ static void qcom_smd_channel_advance(struct qcom_smd_channel *channel, */ static int qcom_smd_channel_recv_single(struct qcom_smd_channel *channel) { - struct qcom_smd_device *qsdev = channel->qsdev; unsigned tail; size_t len; void *ptr; @@ -533,7 +534,7 @@ static int qcom_smd_channel_recv_single(struct qcom_smd_channel *channel) len = channel->pkt_size; } - ret = channel->cb(qsdev, ptr, len); + ret = channel->cb(channel, ptr, len); if (ret < 0) return ret; @@ -1034,6 +1035,18 @@ int qcom_smd_driver_register(struct qcom_smd_driver *qsdrv) } EXPORT_SYMBOL(qcom_smd_driver_register); +void *qcom_smd_get_drvdata(struct qcom_smd_channel *channel) +{ + return channel->drvdata; +} +EXPORT_SYMBOL(qcom_smd_get_drvdata); + +void qcom_smd_set_drvdata(struct qcom_smd_channel *channel, void *data) +{ + channel->drvdata = data; +} +EXPORT_SYMBOL(qcom_smd_set_drvdata); + /** * qcom_smd_driver_unregister - unregister a smd driver * @qsdrv: qcom_smd_driver struct @@ -1079,12 +1092,13 @@ qcom_smd_find_channel(struct qcom_smd_edge *edge, const char *name) * Returns a channel handle on success, or -EPROBE_DEFER if the channel isn't * ready. */ -struct qcom_smd_channel *qcom_smd_open_channel(struct qcom_smd_device *sdev, +struct qcom_smd_channel *qcom_smd_open_channel(struct qcom_smd_channel *parent, const char *name, qcom_smd_cb_t cb) { struct qcom_smd_channel *channel; - struct qcom_smd_edge *edge = sdev->channel->edge; + struct qcom_smd_device *sdev = parent->qsdev; + struct qcom_smd_edge *edge = parent->edge; int ret; /* Wait up to HZ for the channel to appear */ diff --git a/drivers/soc/qcom/wcnss_ctrl.c b/drivers/soc/qcom/wcnss_ctrl.c index 7a986f881d5c..c544f3d2c6ee 100644 --- a/drivers/soc/qcom/wcnss_ctrl.c +++ b/drivers/soc/qcom/wcnss_ctrl.c @@ -100,17 +100,17 @@ struct wcnss_download_nv_resp { /** * wcnss_ctrl_smd_callback() - handler from SMD responses - * @qsdev: smd device handle + * @channel: smd channel handle * @data: pointer to the incoming data packet * @count: size of the incoming data packet * * Handles any incoming packets from the remote WCNSS_CTRL service. */ -static int wcnss_ctrl_smd_callback(struct qcom_smd_device *qsdev, +static int wcnss_ctrl_smd_callback(struct qcom_smd_channel *channel, const void *data, size_t count) { - struct wcnss_ctrl *wcnss = dev_get_drvdata(&qsdev->dev); + struct wcnss_ctrl *wcnss = qcom_smd_get_drvdata(channel); const struct wcnss_download_nv_resp *nvresp; const struct wcnss_version_resp *version; const struct wcnss_msg_hdr *hdr = data; @@ -246,7 +246,7 @@ static int wcnss_ctrl_probe(struct qcom_smd_device *sdev) init_completion(&wcnss->ack); INIT_WORK(&wcnss->download_nv_work, wcnss_download_nv); - dev_set_drvdata(&sdev->dev, wcnss); + qcom_smd_set_drvdata(sdev->channel, wcnss); return wcnss_request_version(wcnss); } diff --git a/include/linux/soc/qcom/smd.h b/include/linux/soc/qcom/smd.h index bd51c8a9d807..cb2f81559bc0 100644 --- a/include/linux/soc/qcom/smd.h +++ b/include/linux/soc/qcom/smd.h @@ -26,7 +26,7 @@ struct qcom_smd_device { struct qcom_smd_channel *channel; }; -typedef int (*qcom_smd_cb_t)(struct qcom_smd_device *, const void *, size_t); +typedef int (*qcom_smd_cb_t)(struct qcom_smd_channel *, const void *, size_t); /** * struct qcom_smd_driver - smd driver struct @@ -50,13 +50,16 @@ struct qcom_smd_driver { int qcom_smd_driver_register(struct qcom_smd_driver *drv); void qcom_smd_driver_unregister(struct qcom_smd_driver *drv); +void *qcom_smd_get_drvdata(struct qcom_smd_channel *channel); +void qcom_smd_set_drvdata(struct qcom_smd_channel *channel, void *data); + #define module_qcom_smd_driver(__smd_driver) \ module_driver(__smd_driver, qcom_smd_driver_register, \ qcom_smd_driver_unregister) int qcom_smd_send(struct qcom_smd_channel *channel, const void *data, int len); -struct qcom_smd_channel *qcom_smd_open_channel(struct qcom_smd_device *sdev, +struct qcom_smd_channel *qcom_smd_open_channel(struct qcom_smd_channel *channel, const char *name, qcom_smd_cb_t cb);