Re: [PATCH 3/4] wcn36xx: Transition driver to SMD client

Eugene Krasnikov
2016-01-11T09:02:33Z

Better late than never! Looks good to me.

2015-12-28 1:34 GMT+00:00 Bjorn Andersson <bjorn@kryo.se>:
> The wcn36xx wifi driver follows the life cycle of the WLAN_CTRL SMD
> channel, as such it should be a SMD client. This patch makes this
> transition, now that we have the necessary frameworks available.
>
> Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
> ---
> drivers/net/wireless/ath/wcn36xx/Kconfig | 2 +-
> drivers/net/wireless/ath/wcn36xx/dxe.c | 16 +++--
> drivers/net/wireless/ath/wcn36xx/main.c | 111 +++++++++++++++++------------
> drivers/net/wireless/ath/wcn36xx/smd.c | 26 ++++---
> drivers/net/wireless/ath/wcn36xx/smd.h | 4 ++
> drivers/net/wireless/ath/wcn36xx/wcn36xx.h | 21 ++----
> 6 files changed, 99 insertions(+), 81 deletions(-)
>
> diff --git a/drivers/net/wireless/ath/wcn36xx/Kconfig b/drivers/net/wireless/ath/wcn36xx/Kconfig
> index 591ebaea8265..394fe5b77c90 100644
> --- a/drivers/net/wireless/ath/wcn36xx/Kconfig
> +++ b/drivers/net/wireless/ath/wcn36xx/Kconfig
> @@ -1,6 +1,6 @@
> config WCN36XX
> tristate "Qualcomm Atheros WCN3660/3680 support"
> - depends on MAC80211 && HAS_DMA
> + depends on MAC80211 && HAS_DMA && QCOM_SMD
> ---help---
> This module adds support for wireless adapters based on
> Qualcomm Atheros WCN3660 and WCN3680 mobile chipsets.
> diff --git a/drivers/net/wireless/ath/wcn36xx/dxe.c b/drivers/net/wireless/ath/wcn36xx/dxe.c
> index f8dfa05b290a..47f3937a7ab9 100644
> --- a/drivers/net/wireless/ath/wcn36xx/dxe.c
> +++ b/drivers/net/wireless/ath/wcn36xx/dxe.c
> @@ -23,6 +23,7 @@
> #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
>
> #include <linux/interrupt.h>
> +#include <linux/soc/qcom/smem_state.h>
> #include "wcn36xx.h"
> #include "txrx.h"
>
> @@ -150,9 +151,12 @@ int wcn36xx_dxe_alloc_ctl_blks(struct wcn36xx *wcn)
> goto out_err;
>
> /* Initialize SMSM state Clear TX Enable RING EMPTY STATE */
> - ret = wcn->ctrl_ops->smsm_change_state(
> - WCN36XX_SMSM_WLAN_TX_ENABLE,
> - WCN36XX_SMSM_WLAN_TX_RINGS_EMPTY);
> + ret = qcom_smem_state_update_bits(wcn->tx_enable_state,
> + WCN36XX_SMSM_WLAN_TX_ENABLE |
> + WCN36XX_SMSM_WLAN_TX_RINGS_EMPTY,
> + WCN36XX_SMSM_WLAN_TX_RINGS_EMPTY);
> + if (ret)
> + goto out_err;
>
> return 0;
>
> @@ -676,9 +680,9 @@ int wcn36xx_dxe_tx_frame(struct wcn36xx *wcn,
> * notify chip about new frame through SMSM bus.
> */
> if (is_low && vif_priv->pw_state == WCN36XX_BMPS) {
> - wcn->ctrl_ops->smsm_change_state(
> - 0,
> - WCN36XX_SMSM_WLAN_TX_ENABLE);
> + qcom_smem_state_update_bits(wcn->tx_rings_empty_state,
> + WCN36XX_SMSM_WLAN_TX_ENABLE,
> + WCN36XX_SMSM_WLAN_TX_ENABLE);
> } else {
> /* indicate End Of Packet and generate interrupt on descriptor
> * done.
> diff --git a/drivers/net/wireless/ath/wcn36xx/main.c b/drivers/net/wireless/ath/wcn36xx/main.c
> index 7c169abdbafe..8659e3f997d2 100644
> --- a/drivers/net/wireless/ath/wcn36xx/main.c
> +++ b/drivers/net/wireless/ath/wcn36xx/main.c
> @@ -19,6 +19,9 @@
> #include <linux/module.h>
> #include <linux/firmware.h>
> #include <linux/platform_device.h>
> +#include <linux/of_irq.h>
> +#include <linux/soc/qcom/smd.h>
> +#include <linux/soc/qcom/smem_state.h>
> #include "wcn36xx.h"
>
> unsigned int wcn36xx_dbg_mask;
> @@ -981,48 +984,63 @@ static int wcn36xx_init_ieee80211(struct wcn36xx *wcn)
> }
>
> static int wcn36xx_platform_get_resources(struct wcn36xx *wcn,
> - struct platform_device *pdev)
> + struct device *dev)
> {
> - struct resource *res;
> + u32 mmio[2];
> + int ret;
> +
> /* Set TX IRQ */
> - res = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
> - "wcnss_wlantx_irq");
> - if (!res) {
> + wcn->tx_irq = irq_of_parse_and_map(dev->of_node, 0);
> + if (!wcn->tx_irq) {
> wcn36xx_err("failed to get tx_irq\n");
> return -ENOENT;
> }
> - wcn->tx_irq = res->start;
>
> /* Set RX IRQ */
> - res = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
> - "wcnss_wlanrx_irq");
> - if (!res) {
> + wcn->rx_irq = irq_of_parse_and_map(dev->of_node, 1);
> + if (!wcn->rx_irq) {
> wcn36xx_err("failed to get rx_irq\n");
> return -ENOENT;
> }
> - wcn->rx_irq = res->start;
> +
> + /* Acquire SMSM tx enable handle */
> + wcn->tx_enable_state = qcom_smem_state_get(dev, "tx-enable",
> + &wcn->tx_enable_state_bit);
> + if (IS_ERR(wcn->tx_enable_state)) {
> + wcn36xx_err("failed to get tx-enable state\n");
> + return -ENOENT;
> + }
> +
> + /* Acquire SMSM tx rings empty handle */
> + wcn->tx_rings_empty_state = qcom_smem_state_get(dev, "tx-rings-empty",
> + &wcn->tx_rings_empty_state_bit);
> + if (IS_ERR(wcn->tx_rings_empty_state)) {
> + wcn36xx_err("failed to get tx-rings-empty state\n");
> + return -ENOENT;
> + }
>
> /* Map the memory */
> - res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
> - "wcnss_mmio");
> - if (!res) {
> - wcn36xx_err("failed to get mmio\n");
> + ret = of_property_read_u32_array(dev->of_node, "qcom,wcnss-mmio", mmio, 2);
> + if (ret) {
> + wcn36xx_err("failed to get qcom,wcnss-mmio\n");
> return -ENOENT;
> }
> - wcn->mmio = ioremap(res->start, resource_size(res));
> +
> + wcn->mmio = ioremap(mmio[0], mmio[1]);
> if (!wcn->mmio) {
> wcn36xx_err("failed to map io memory\n");
> return -ENOMEM;
> }
> +
> return 0;
> }
>
> -static int wcn36xx_probe(struct platform_device *pdev)
> +static int wcn36xx_probe(struct qcom_smd_device *sdev)
> {
> struct ieee80211_hw *hw;
> struct wcn36xx *wcn;
> int ret;
> - u8 addr[ETH_ALEN];
> + const u8 *addr;
>
> wcn36xx_dbg(WCN36XX_DBG_MAC, "platform probe\n");
>
> @@ -1032,20 +1050,27 @@ static int wcn36xx_probe(struct platform_device *pdev)
> ret = -ENOMEM;
> goto out_err;
> }
> - platform_set_drvdata(pdev, hw);
> + dev_set_drvdata(&sdev->dev, hw);
> wcn = hw->priv;
> wcn->hw = hw;
> - wcn->dev = &pdev->dev;
> - wcn->ctrl_ops = pdev->dev.platform_data;
> + wcn->dev = &sdev->dev;
> + wcn->smd_channel = sdev->channel;
>
> mutex_init(&wcn->hal_mutex);
>
> - if (!wcn->ctrl_ops->get_hw_mac(addr)) {
> + sdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
> +
> + addr = of_get_property(sdev->dev.of_node, "local-mac-address", &ret);
> + if (addr && ret != ETH_ALEN) {
> + wcn36xx_err("invalid local-mac-address\n");
> + ret = -EINVAL;
> + goto out_err;
> + } else if (addr) {
> wcn36xx_info("mac address: %pM\n", addr);
> SET_IEEE80211_PERM_ADDR(wcn->hw, addr);
> }
>
> - ret = wcn36xx_platform_get_resources(wcn, pdev);
> + ret = wcn36xx_platform_get_resources(wcn, &sdev->dev);
> if (ret)
> goto out_wq;
>
> @@ -1063,9 +1088,10 @@ out_wq:
> out_err:
> return ret;
> }
> -static int wcn36xx_remove(struct platform_device *pdev)
> +
> +static void wcn36xx_remove(struct qcom_smd_device *sdev)
> {
> - struct ieee80211_hw *hw = platform_get_drvdata(pdev);
> + struct ieee80211_hw *hw = dev_get_drvdata(&sdev->dev);
> struct wcn36xx *wcn = hw->priv;
> wcn36xx_dbg(WCN36XX_DBG_MAC, "platform remove\n");
>
> @@ -1073,41 +1099,34 @@ static int wcn36xx_remove(struct platform_device *pdev)
> mutex_destroy(&wcn->hal_mutex);
>
> ieee80211_unregister_hw(hw);
> +
> + qcom_smem_state_put(wcn->tx_enable_state);
> + qcom_smem_state_put(wcn->tx_rings_empty_state);
> +
> iounmap(wcn->mmio);
> ieee80211_free_hw(hw);
> -
> - return 0;
> }
> -static const struct platform_device_id wcn36xx_platform_id_table[] = {
> - {
> - .name = "wcn36xx",
> - .driver_data = 0
> - },
> +
> +static const struct of_device_id wcn36xx_of_match[] = {
> + { .compatible = "qcom,wcn3620-wlan" },
> + { .compatible = "qcom,wcn3660-wlan" },
> + { .compatible = "qcom,wcn3680-wlan" },
> {}
> };
> -MODULE_DEVICE_TABLE(platform, wcn36xx_platform_id_table);
> +MODULE_DEVICE_TABLE(of, wcn36xx_of_match);
>
> -static struct platform_driver wcn36xx_driver = {
> +static struct qcom_smd_driver wcn36xx_driver = {
> .probe = wcn36xx_probe,
> .remove = wcn36xx_remove,
> + .callback = wcn36xx_smd_rsp_process,
> .driver = {
> .name = "wcn36xx",
> + .of_match_table = wcn36xx_of_match,
> + .owner = THIS_MODULE,
> },
> - .id_table = wcn36xx_platform_id_table,
> };
>
> -static int __init wcn36xx_init(void)
> -{
> - platform_driver_register(&wcn36xx_driver);
> - return 0;
> -}
> -module_init(wcn36xx_init);
> -
> -static void __exit wcn36xx_exit(void)
> -{
> - platform_driver_unregister(&wcn36xx_driver);
> -}
> -module_exit(wcn36xx_exit);
> +module_qcom_smd_driver(wcn36xx_driver);
>
> MODULE_LICENSE("Dual BSD/GPL");
> MODULE_AUTHOR("Eugene Krasnikov k.eugene.e@gmail.com");
> diff --git a/drivers/net/wireless/ath/wcn36xx/smd.c b/drivers/net/wireless/ath/wcn36xx/smd.c
> index 4307429740a9..2bf42787a4af 100644
> --- a/drivers/net/wireless/ath/wcn36xx/smd.c
> +++ b/drivers/net/wireless/ath/wcn36xx/smd.c
> @@ -19,6 +19,7 @@
> #include <linux/etherdevice.h>
> #include <linux/firmware.h>
> #include <linux/bitops.h>
> +#include <linux/soc/qcom/smd.h>
> #include "smd.h"
>
> struct wcn36xx_cfg_val {
> @@ -253,7 +254,7 @@ static int wcn36xx_smd_send_and_wait(struct wcn36xx *wcn, size_t len)
>
> init_completion(&wcn->hal_rsp_compl);
> start = jiffies;
> - ret = wcn->ctrl_ops->tx(wcn->hal_buf, len);
> + ret = qcom_smd_send(wcn->smd_channel, wcn->hal_buf, len);
> if (ret) {
> wcn36xx_err("HAL TX failed\n");
> goto out;
> @@ -2100,9 +2101,13 @@ out:
> mutex_unlock(&wcn->hal_mutex);
> return ret;
> }
> -static void wcn36xx_smd_rsp_process(struct wcn36xx *wcn, void *buf, size_t len)
> +
> +int wcn36xx_smd_rsp_process(struct qcom_smd_device *sdev,
> + const void *buf, size_t len)
> {
> - struct wcn36xx_hal_msg_header *msg_header = buf;
> + const struct wcn36xx_hal_msg_header *msg_header = buf;
> + struct ieee80211_hw *hw = dev_get_drvdata(&sdev->dev);
> + struct wcn36xx *wcn = hw->priv;
> struct wcn36xx_hal_ind_msg *msg_ind;
> wcn36xx_dbg_dump(WCN36XX_DBG_SMD_DUMP, "SMD <<< ", buf, len);
>
> @@ -2151,7 +2156,7 @@ static void wcn36xx_smd_rsp_process(struct wcn36xx *wcn, void *buf, size_t len)
> case WCN36XX_HAL_OTA_TX_COMPL_IND:
> case WCN36XX_HAL_MISSED_BEACON_IND:
> case WCN36XX_HAL_DELETE_STA_CONTEXT_IND:
> - msg_ind = kmalloc(sizeof(*msg_ind) + len, GFP_KERNEL);
> + msg_ind = kmalloc(sizeof(*msg_ind) + len, GFP_ATOMIC);
> if (!msg_ind) {
> /*
> * FIXME: Do something smarter then just
> @@ -2175,6 +2180,8 @@ static void wcn36xx_smd_rsp_process(struct wcn36xx *wcn, void *buf, size_t len)
> wcn36xx_err("SMD_EVENT (%d) not supported\n",
> msg_header->msg_type);
> }
> +
> + return 0;
> }
> static void wcn36xx_ind_smd_work(struct work_struct *work)
> {
> @@ -2232,22 +2239,13 @@ int wcn36xx_smd_open(struct wcn36xx *wcn)
> INIT_LIST_HEAD(&wcn->hal_ind_queue);
> spin_lock_init(&wcn->hal_ind_lock);
>
> - ret = wcn->ctrl_ops->open(wcn, wcn36xx_smd_rsp_process);
> - if (ret) {
> - wcn36xx_err("failed to open control channel\n");
> - goto free_wq;
> - }
> -
> - return ret;
> + return 0;
>
> -free_wq:
> - destroy_workqueue(wcn->hal_ind_wq);
> out:
> return ret;
> }
>
> void wcn36xx_smd_close(struct wcn36xx *wcn)
> {
> - wcn->ctrl_ops->close();
> destroy_workqueue(wcn->hal_ind_wq);
> }
> diff --git a/drivers/net/wireless/ath/wcn36xx/smd.h b/drivers/net/wireless/ath/wcn36xx/smd.h
> index 21cc4ac7b5ca..4d96d56d266f 100644
> --- a/drivers/net/wireless/ath/wcn36xx/smd.h
> +++ b/drivers/net/wireless/ath/wcn36xx/smd.h
> @@ -60,6 +60,7 @@ struct wcn36xx_hal_ind_msg {
> };
>
> struct wcn36xx;
> +struct qcom_smd_device;
>
> int wcn36xx_smd_open(struct wcn36xx *wcn);
> void wcn36xx_smd_close(struct wcn36xx *wcn);
> @@ -136,4 +137,7 @@ int wcn36xx_smd_del_ba(struct wcn36xx *wcn, u16 tid, u8 sta_index);
> int wcn36xx_smd_trigger_ba(struct wcn36xx *wcn, u8 sta_index);
>
> int wcn36xx_smd_update_cfg(struct wcn36xx *wcn, u32 cfg_id, u32 value);
> +
> +int wcn36xx_smd_rsp_process(struct qcom_smd_device *sdev,
> + const void *buf, size_t len);
> #endif /* _SMD_H_ */
> diff --git a/drivers/net/wireless/ath/wcn36xx/wcn36xx.h b/drivers/net/wireless/ath/wcn36xx/wcn36xx.h
> index 7997cc1312ee..4be81f66e167 100644
> --- a/drivers/net/wireless/ath/wcn36xx/wcn36xx.h
> +++ b/drivers/net/wireless/ath/wcn36xx/wcn36xx.h
> @@ -103,19 +103,6 @@ struct nv_data {
> u8 table;
> };
>
> -/* Interface for platform control path
> - *
> - * @open: hook must be called when wcn36xx wants to open control channel.
> - * @tx: sends a buffer.
> - */
> -struct wcn36xx_platform_ctrl_ops {
> - int (*open)(void *drv_priv, void *rsp_cb);
> - void (*close)(void);
> - int (*tx)(char *buf, size_t len);
> - int (*get_hw_mac)(u8 *addr);
> - int (*smsm_change_state)(u32 clear_mask, u32 set_mask);
> -};
> -
> /**
> * struct wcn36xx_vif - holds VIF related fields
> *
> @@ -204,7 +191,13 @@ struct wcn36xx {
> int rx_irq;
> void __iomem *mmio;
>
> - struct wcn36xx_platform_ctrl_ops *ctrl_ops;
> + struct qcom_smd_channel *smd_channel;
> +
> + struct qcom_smem_state *tx_enable_state;
> + unsigned tx_enable_state_bit;
> + struct qcom_smem_state *tx_rings_empty_state;
> + unsigned tx_rings_empty_state_bit;
> +
> /*
> * smd_buf must be protected with smd_mutex to garantee
> * that all messages are sent one after another
> --
> 2.5.0
>

--
Best regards,
Eugene