[PATCH v3 1/2] wcn36xx: Transition driver to SMD client

[PATCH v3 1/2] wcn36xx: Transition driver to SMD client

[Bjorn Andersson]

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@linaro.org>
---

Changes since v2:
- Correct the call to the new ieee80211_scan_completed()

 drivers/net/wireless/ath/wcn36xx/Kconfig   |  2 +-
 drivers/net/wireless/ath/wcn36xx/dxe.c     | 16 +++---
 drivers/net/wireless/ath/wcn36xx/main.c    | 79 ++++++++++++++++++++----------
 drivers/net/wireless/ath/wcn36xx/smd.c     | 29 +++++------
 drivers/net/wireless/ath/wcn36xx/smd.h     |  5 ++
 drivers/net/wireless/ath/wcn36xx/wcn36xx.h | 21 +++-----
 6 files changed, 86 insertions(+), 66 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 231fd022f0f5..87dfdaf9044c 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"
 
@@ -151,9 +152,12 @@ 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;
 
@@ -678,9 +682,9 @@ 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 e1d59da2ad20..3c2522b07c90 100644
--- a/drivers/net/wireless/ath/wcn36xx/main.c
+++ b/drivers/net/wireless/ath/wcn36xx/main.c
@@ -21,6 +21,10 @@
 #include <linux/platform_device.h>
 #include <linux/of_address.h>
 #include <linux/of_device.h>
+#include <linux/of_irq.h>
+#include <linux/soc/qcom/smd.h>
+#include <linux/soc/qcom/smem_state.h>
+#include <linux/soc/qcom/wcnss_ctrl.h>
 #include "wcn36xx.h"
 
 unsigned int wcn36xx_dbg_mask;
@@ -1058,8 +1062,7 @@ static int wcn36xx_platform_get_resources(struct wcn36xx *wcn,
 	int ret;
 
 	/* Set TX IRQ */
-	res = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
-					   "wcnss_wlantx_irq");
+	res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "tx");
 	if (!res) {
 		wcn36xx_err("failed to get tx_irq\n");
 		return -ENOENT;
@@ -1067,14 +1070,29 @@ static int wcn36xx_platform_get_resources(struct wcn36xx *wcn,
 	wcn->tx_irq = res->start;
 
 	/* Set RX IRQ */
-	res = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
-					   "wcnss_wlanrx_irq");
+	res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "rx");
 	if (!res) {
 		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(&pdev->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 PTR_ERR(wcn->tx_enable_state);
+	}
+
+	/* Acquire SMSM tx rings empty handle */
+	wcn->tx_rings_empty_state = qcom_smem_state_get(&pdev->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 PTR_ERR(wcn->tx_rings_empty_state);
+	}
+
 	mmio_node = of_parse_phandle(pdev->dev.parent->of_node, "qcom,mmio", 0);
 	if (!mmio_node) {
 		wcn36xx_err("failed to acquire qcom,mmio reference\n");
@@ -1115,11 +1133,14 @@ static int wcn36xx_probe(struct platform_device *pdev)
 {
 	struct ieee80211_hw *hw;
 	struct wcn36xx *wcn;
+	void *wcnss;
 	int ret;
-	u8 addr[ETH_ALEN];
+	const u8 *addr;
 
 	wcn36xx_dbg(WCN36XX_DBG_MAC, "platform probe\n");
 
+	wcnss = dev_get_drvdata(pdev->dev.parent);
+
 	hw = ieee80211_alloc_hw(sizeof(struct wcn36xx), &wcn36xx_ops);
 	if (!hw) {
 		wcn36xx_err("failed to alloc hw\n");
@@ -1130,11 +1151,23 @@ static int wcn36xx_probe(struct platform_device *pdev)
 	wcn = hw->priv;
 	wcn->hw = hw;
 	wcn->dev = &pdev->dev;
-	wcn->ctrl_ops = pdev->dev.platform_data;
-
 	mutex_init(&wcn->hal_mutex);
 
-	if (!wcn->ctrl_ops->get_hw_mac(addr)) {
+	wcn->smd_channel = qcom_wcnss_open_channel(wcnss, "WLAN_CTRL", wcn36xx_smd_rsp_process);
+	if (IS_ERR(wcn->smd_channel)) {
+		wcn36xx_err("failed to open WLAN_CTRL channel\n");
+		ret = PTR_ERR(wcn->smd_channel);
+		goto out_wq;
+	}
+
+	qcom_smd_set_drvdata(wcn->smd_channel, hw);
+
+	addr = of_get_property(pdev->dev.of_node, "local-mac-address", &ret);
+	if (addr && ret != ETH_ALEN) {
+		wcn36xx_err("invalid local-mac-address\n");
+		ret = -EINVAL;
+		goto out_wq;
+	} else if (addr) {
 		wcn36xx_info("mac address: %pM\n", addr);
 		SET_IEEE80211_PERM_ADDR(wcn->hw, addr);
 	}
@@ -1158,6 +1191,7 @@ out_wq:
 out_err:
 	return ret;
 }
+
 static int wcn36xx_remove(struct platform_device *pdev)
 {
 	struct ieee80211_hw *hw = platform_get_drvdata(pdev);
@@ -1168,42 +1202,33 @@ 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->dxe_base);
 	iounmap(wcn->ccu_base);
 	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,wcnss-wlan" },
 	{}
 };
-MODULE_DEVICE_TABLE(platform, wcn36xx_platform_id_table);
+MODULE_DEVICE_TABLE(of, wcn36xx_of_match);
 
 static struct platform_driver wcn36xx_driver = {
 	.probe      = wcn36xx_probe,
 	.remove     = wcn36xx_remove,
 	.driver         = {
 		.name   = "wcn36xx",
+		.of_match_table = wcn36xx_of_match,
 	},
-	.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_platform_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 a443992320f2..d9ff2e2a8118 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;
@@ -2180,9 +2181,12 @@ out:
 	return ret;
 }
 
-static void wcn36xx_smd_rsp_process(struct wcn36xx *wcn, void *buf, size_t len)
+int wcn36xx_smd_rsp_process(struct qcom_smd_channel *channel,
+			    const void *buf, size_t len)
 {
 	struct wcn36xx_hal_msg_header *msg_header = buf;
+	struct ieee80211_hw *hw = qcom_smd_get_drvdata(channel);
+	struct wcn36xx *wcn = hw->priv;
 	struct wcn36xx_hal_ind_msg *msg_ind;
 	wcn36xx_dbg_dump(WCN36XX_DBG_SMD_DUMP, "SMD <<< ", buf, len);
 
@@ -2233,15 +2237,11 @@ 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
-			 * printing an error.
-			 */
 			wcn36xx_err("Run out of memory while handling SMD_EVENT (%d)\n",
 				    msg_header->msg_type);
-			break;
+			return -ENOMEM;
 		}
 
 		msg_ind->msg_len = len;
@@ -2257,6 +2257,8 @@ 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)
 {
@@ -2315,22 +2317,13 @@ 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 df80cbbd9d1b..40d829563c2b 100644
--- a/drivers/net/wireless/ath/wcn36xx/smd.h
+++ b/drivers/net/wireless/ath/wcn36xx/smd.h
@@ -51,6 +51,7 @@ struct wcn36xx_hal_ind_msg {
 };
 
 struct wcn36xx;
+struct qcom_smd_channel;
 
 int wcn36xx_smd_open(struct wcn36xx *wcn);
 void wcn36xx_smd_close(struct wcn36xx *wcn);
@@ -127,6 +128,10 @@ 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_channel *channel,
+			    const void *buf, size_t len);
+
 int wcn36xx_smd_set_mc_list(struct wcn36xx *wcn,
 			    struct ieee80211_vif *vif,
 			    struct wcn36xx_hal_rcv_flt_mc_addr_list_type *fp);
diff --git a/drivers/net/wireless/ath/wcn36xx/wcn36xx.h b/drivers/net/wireless/ath/wcn36xx/wcn36xx.h
index 22242d18e1fe..68cc06cf9bc0 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
  *
@@ -205,7 +192,13 @@ struct wcn36xx {
 	void __iomem		*ccu_base;
 	void __iomem		*dxe_base;
 
-	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

[PATCH v3 2/2] wcn36xx: Implement firmware assisted scan

[Bjorn Andersson]

Using the software based channel scan mechanism from mac80211 keeps us
offline for 10-15 second, we should instead issue a start_scan/end_scan
on each channel reducing this time.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---

Changes since v2:
- None

 drivers/net/wireless/ath/wcn36xx/main.c    | 64 +++++++++++++++++++++++++-----
 drivers/net/wireless/ath/wcn36xx/smd.c     |  8 ++--
 drivers/net/wireless/ath/wcn36xx/smd.h     |  4 +-
 drivers/net/wireless/ath/wcn36xx/txrx.c    | 19 ++++++---
 drivers/net/wireless/ath/wcn36xx/wcn36xx.h |  9 +++++
 5 files changed, 81 insertions(+), 23 deletions(-)

diff --git a/drivers/net/wireless/ath/wcn36xx/main.c b/drivers/net/wireless/ath/wcn36xx/main.c
index 3c2522b07c90..96a9584edcbb 100644
--- a/drivers/net/wireless/ath/wcn36xx/main.c
+++ b/drivers/net/wireless/ath/wcn36xx/main.c
@@ -568,23 +568,59 @@ out:
 	return ret;
 }
 
-static void wcn36xx_sw_scan_start(struct ieee80211_hw *hw,
-				  struct ieee80211_vif *vif,
-				  const u8 *mac_addr)
+static void wcn36xx_hw_scan_worker(struct work_struct *work)
 {
-	struct wcn36xx *wcn = hw->priv;
+	struct wcn36xx *wcn = container_of(work, struct wcn36xx, scan_work);
+	struct cfg80211_scan_request *req = wcn->scan_req;
+	u8 channels[WCN36XX_HAL_PNO_MAX_NETW_CHANNELS_EX];
+	struct cfg80211_scan_info scan_info = {};
+	int i;
+
+	wcn36xx_dbg(WCN36XX_DBG_MAC, "mac80211 scan %d channels worker\n", req->n_channels);
+
+	for (i = 0; i < req->n_channels; i++)
+		channels[i] = req->channels[i]->hw_value;
+
+	wcn36xx_smd_update_scan_params(wcn, channels, req->n_channels);
 
 	wcn36xx_smd_init_scan(wcn, HAL_SYS_MODE_SCAN);
-	wcn36xx_smd_start_scan(wcn);
+	for (i = 0; i < req->n_channels; i++) {
+		wcn->scan_freq = req->channels[i]->center_freq;
+		wcn->scan_band = req->channels[i]->band;
+
+		wcn36xx_smd_start_scan(wcn, req->channels[i]->hw_value);
+		msleep(30);
+		wcn36xx_smd_end_scan(wcn, req->channels[i]->hw_value);
+
+		wcn->scan_freq = 0;
+	}
+	wcn36xx_smd_finish_scan(wcn, HAL_SYS_MODE_SCAN);
+
+	scan_info.aborted = false;
+	ieee80211_scan_completed(wcn->hw, &scan_info);
+
+	mutex_lock(&wcn->scan_lock);
+	wcn->scan_req = NULL;
+	mutex_unlock(&wcn->scan_lock);
 }
 
-static void wcn36xx_sw_scan_complete(struct ieee80211_hw *hw,
-				     struct ieee80211_vif *vif)
+static int wcn36xx_hw_scan(struct ieee80211_hw *hw,
+			   struct ieee80211_vif *vif,
+			   struct ieee80211_scan_request *hw_req)
 {
 	struct wcn36xx *wcn = hw->priv;
 
-	wcn36xx_smd_end_scan(wcn);
-	wcn36xx_smd_finish_scan(wcn, HAL_SYS_MODE_SCAN);
+	mutex_lock(&wcn->scan_lock);
+	if (wcn->scan_req) {
+		mutex_unlock(&wcn->scan_lock);
+		return -EBUSY;
+	}
+	wcn->scan_req = &hw_req->req;
+	mutex_unlock(&wcn->scan_lock);
+
+	schedule_work(&wcn->scan_work);
+
+	return 0;
 }
 
 static void wcn36xx_update_allowed_rates(struct ieee80211_sta *sta,
@@ -997,8 +1033,7 @@ static const struct ieee80211_ops wcn36xx_ops = {
 	.configure_filter       = wcn36xx_configure_filter,
 	.tx			= wcn36xx_tx,
 	.set_key		= wcn36xx_set_key,
-	.sw_scan_start		= wcn36xx_sw_scan_start,
-	.sw_scan_complete	= wcn36xx_sw_scan_complete,
+	.hw_scan		= wcn36xx_hw_scan,
 	.bss_info_changed	= wcn36xx_bss_info_changed,
 	.set_rts_threshold	= wcn36xx_set_rts_threshold,
 	.sta_add		= wcn36xx_sta_add,
@@ -1023,6 +1058,7 @@ static int wcn36xx_init_ieee80211(struct wcn36xx *wcn)
 	ieee80211_hw_set(wcn->hw, SUPPORTS_PS);
 	ieee80211_hw_set(wcn->hw, SIGNAL_DBM);
 	ieee80211_hw_set(wcn->hw, HAS_RATE_CONTROL);
+	ieee80211_hw_set(wcn->hw, SINGLE_SCAN_ON_ALL_BANDS);
 
 	wcn->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 		BIT(NL80211_IFTYPE_AP) |
@@ -1032,6 +1068,9 @@ static int wcn36xx_init_ieee80211(struct wcn36xx *wcn)
 	wcn->hw->wiphy->bands[NL80211_BAND_2GHZ] = &wcn_band_2ghz;
 	wcn->hw->wiphy->bands[NL80211_BAND_5GHZ] = &wcn_band_5ghz;
 
+	wcn->hw->wiphy->max_scan_ssids = WCN36XX_MAX_SCAN_SSIDS;
+	wcn->hw->wiphy->max_scan_ie_len = WCN36XX_MAX_SCAN_IE_LEN;
+
 	wcn->hw->wiphy->cipher_suites = cipher_suites;
 	wcn->hw->wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
 
@@ -1152,6 +1191,9 @@ static int wcn36xx_probe(struct platform_device *pdev)
 	wcn->hw = hw;
 	wcn->dev = &pdev->dev;
 	mutex_init(&wcn->hal_mutex);
+	mutex_init(&wcn->scan_lock);
+
+	INIT_WORK(&wcn->scan_work, wcn36xx_hw_scan_worker);
 
 	wcn->smd_channel = qcom_wcnss_open_channel(wcnss, "WLAN_CTRL", wcn36xx_smd_rsp_process);
 	if (IS_ERR(wcn->smd_channel)) {
diff --git a/drivers/net/wireless/ath/wcn36xx/smd.c b/drivers/net/wireless/ath/wcn36xx/smd.c
index d9ff2e2a8118..83d067876969 100644
--- a/drivers/net/wireless/ath/wcn36xx/smd.c
+++ b/drivers/net/wireless/ath/wcn36xx/smd.c
@@ -522,7 +522,7 @@ out:
 	return ret;
 }
 
-int wcn36xx_smd_start_scan(struct wcn36xx *wcn)
+int wcn36xx_smd_start_scan(struct wcn36xx *wcn, u8 scan_channel)
 {
 	struct wcn36xx_hal_start_scan_req_msg msg_body;
 	int ret = 0;
@@ -530,7 +530,7 @@ int wcn36xx_smd_start_scan(struct wcn36xx *wcn)
 	mutex_lock(&wcn->hal_mutex);
 	INIT_HAL_MSG(msg_body, WCN36XX_HAL_START_SCAN_REQ);
 
-	msg_body.scan_channel = WCN36XX_HW_CHANNEL(wcn);
+	msg_body.scan_channel = scan_channel;
 
 	PREPARE_HAL_BUF(wcn->hal_buf, msg_body);
 
@@ -552,7 +552,7 @@ out:
 	return ret;
 }
 
-int wcn36xx_smd_end_scan(struct wcn36xx *wcn)
+int wcn36xx_smd_end_scan(struct wcn36xx *wcn, u8 scan_channel)
 {
 	struct wcn36xx_hal_end_scan_req_msg msg_body;
 	int ret = 0;
@@ -560,7 +560,7 @@ int wcn36xx_smd_end_scan(struct wcn36xx *wcn)
 	mutex_lock(&wcn->hal_mutex);
 	INIT_HAL_MSG(msg_body, WCN36XX_HAL_END_SCAN_REQ);
 
-	msg_body.scan_channel = WCN36XX_HW_CHANNEL(wcn);
+	msg_body.scan_channel = scan_channel;
 
 	PREPARE_HAL_BUF(wcn->hal_buf, msg_body);
 
diff --git a/drivers/net/wireless/ath/wcn36xx/smd.h b/drivers/net/wireless/ath/wcn36xx/smd.h
index 40d829563c2b..8892ccd67b14 100644
--- a/drivers/net/wireless/ath/wcn36xx/smd.h
+++ b/drivers/net/wireless/ath/wcn36xx/smd.h
@@ -60,8 +60,8 @@ int wcn36xx_smd_load_nv(struct wcn36xx *wcn);
 int wcn36xx_smd_start(struct wcn36xx *wcn);
 int wcn36xx_smd_stop(struct wcn36xx *wcn);
 int wcn36xx_smd_init_scan(struct wcn36xx *wcn, enum wcn36xx_hal_sys_mode mode);
-int wcn36xx_smd_start_scan(struct wcn36xx *wcn);
-int wcn36xx_smd_end_scan(struct wcn36xx *wcn);
+int wcn36xx_smd_start_scan(struct wcn36xx *wcn, u8 scan_channel);
+int wcn36xx_smd_end_scan(struct wcn36xx *wcn, u8 scan_channel);
 int wcn36xx_smd_finish_scan(struct wcn36xx *wcn,
 			    enum wcn36xx_hal_sys_mode mode);
 int wcn36xx_smd_update_scan_params(struct wcn36xx *wcn, u8 *channels, size_t channel_count);
diff --git a/drivers/net/wireless/ath/wcn36xx/txrx.c b/drivers/net/wireless/ath/wcn36xx/txrx.c
index 1f34c2e912d7..8c387a0a3c09 100644
--- a/drivers/net/wireless/ath/wcn36xx/txrx.c
+++ b/drivers/net/wireless/ath/wcn36xx/txrx.c
@@ -45,9 +45,20 @@ int wcn36xx_rx_skb(struct wcn36xx *wcn, struct sk_buff *skb)
 	skb_put(skb, bd->pdu.mpdu_header_off + bd->pdu.mpdu_len);
 	skb_pull(skb, bd->pdu.mpdu_header_off);
 
+	hdr = (struct ieee80211_hdr *) skb->data;
+	fc = __le16_to_cpu(hdr->frame_control);
+	sn = IEEE80211_SEQ_TO_SN(__le16_to_cpu(hdr->seq_ctrl));
+
+	/* When scanning associate beacons to this */
+	if (ieee80211_is_beacon(hdr->frame_control) && wcn->scan_freq) {
+		status.freq = wcn->scan_freq;
+		status.band = wcn->scan_band;
+	} else {
+		status.freq = WCN36XX_CENTER_FREQ(wcn);
+		status.band = WCN36XX_BAND(wcn);
+	}
+
 	status.mactime = 10;
-	status.freq = WCN36XX_CENTER_FREQ(wcn);
-	status.band = WCN36XX_BAND(wcn);
 	status.signal = -get_rssi0(bd);
 	status.antenna = 1;
 	status.rate_idx = 1;
@@ -61,10 +72,6 @@ int wcn36xx_rx_skb(struct wcn36xx *wcn, struct sk_buff *skb)
 
 	memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
 
-	hdr = (struct ieee80211_hdr *) skb->data;
-	fc = __le16_to_cpu(hdr->frame_control);
-	sn = IEEE80211_SEQ_TO_SN(__le16_to_cpu(hdr->seq_ctrl));
-
 	if (ieee80211_is_beacon(hdr->frame_control)) {
 		wcn36xx_dbg(WCN36XX_DBG_BEACON, "beacon skb %p len %d fc %04x sn %d\n",
 			    skb, skb->len, fc, sn);
diff --git a/drivers/net/wireless/ath/wcn36xx/wcn36xx.h b/drivers/net/wireless/ath/wcn36xx/wcn36xx.h
index 68cc06cf9bc0..35a6590c3ee5 100644
--- a/drivers/net/wireless/ath/wcn36xx/wcn36xx.h
+++ b/drivers/net/wireless/ath/wcn36xx/wcn36xx.h
@@ -35,6 +35,9 @@
 /* How many frames until we start a-mpdu TX session */
 #define WCN36XX_AMPDU_START_THRESH	20
 
+#define WCN36XX_MAX_SCAN_SSIDS		9
+#define WCN36XX_MAX_SCAN_IE_LEN		500
+
 extern unsigned int wcn36xx_dbg_mask;
 
 enum wcn36xx_debug_mask {
@@ -212,6 +215,12 @@ struct wcn36xx {
 	spinlock_t		hal_ind_lock;
 	struct list_head	hal_ind_queue;
 
+	struct work_struct	scan_work;
+	struct cfg80211_scan_request *scan_req;
+	int			scan_freq;
+	int			scan_band;
+	struct mutex		scan_lock;
+
 	/* DXE channels */
 	struct wcn36xx_dxe_ch	dxe_tx_l_ch;	/* TX low */
 	struct wcn36xx_dxe_ch	dxe_tx_h_ch;	/* TX high */
-- 
2.5.0

Re: [PATCH v3 1/2] wcn36xx: Transition driver to SMD client

[Kalle Valo]

Bjorn Andersson <bjorn.andersson@linaro.org> writes:

> 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@linaro.org>

[...]

> --- 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

While I had this patch on my pending branch I noticed that I can't
compile wcn36xx on x86 anymore. This is actually quite inconvenient, for
example then it's easy to miss mac80211 API changes etc. Is there any
way we could continue build testing wcn36xx on x86 (or all) platforms?

Also what about older platforms? Earlier I used wcn36xx on my Nexus 4
with help of backports project. I can't do that anymore, right?

-- 
Kalle Valo

Re: [PATCH v3 1/2] wcn36xx: Transition driver to SMD client

[Marcel Holtmann]

Hi Kalle,

>> 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@linaro.org>
> 
> [...]
> 
>> --- 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
> 
> While I had this patch on my pending branch I noticed that I can't
> compile wcn36xx on x86 anymore. This is actually quite inconvenient, for
> example then it's easy to miss mac80211 API changes etc. Is there any
> way we could continue build testing wcn36xx on x86 (or all) platforms?

I would also like that for the btqcomsmd Bluetooth driver. Doing quick build tests on x86 would be great.

Regards

Marcel

Re: [PATCH v3 1/2] wcn36xx: Transition driver to SMD client

[Bjorn Andersson]

On Fri 02 Sep 09:24 PDT 2016, Kalle Valo wrote:

> Bjorn Andersson <bjorn.andersson@linaro.org> writes:
> 
> > 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@linaro.org>
> 
> [...]
> 
> > --- 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
> 
> While I had this patch on my pending branch I noticed that I can't
> compile wcn36xx on x86 anymore. This is actually quite inconvenient, for
> example then it's easy to miss mac80211 API changes etc. Is there any
> way we could continue build testing wcn36xx on x86 (or all) platforms?
> 

Sorry about that, we should at least be able to COMPILE_TEST it in
non-qcom builds. Thanks for letting me know.

And the driver should also depend on QCOM_WCNSS_CTRL, in the normal
case.

I'll respin this, unless you prefer an incremental patch for those
changes(?)

> Also what about older platforms? Earlier I used wcn36xx on my Nexus 4
> with help of backports project. I can't do that anymore, right?
> 

This has been tested on 8064, 8974 and 8916. So your Nexus 4 is covered.

Unfortunately I don't have a Nexus 4, but we currently have Nexus 7
(the 8064 version), Xperia Z, Xperia Z1 and DB410c using this chip and
all four has been tested with this code.

I've staged the PIL/remoteproc (firmware "loader") driver for v4.9, so
with this patch the only thing missing to fill in the dts files is one
clock from the RPM.


JFYI, There seems to be some race in the removal path, which I will look
into. But I would prefer if we could merge this to make the driver
usable, and more accessible to work on.

Regards,
Bjorn

Re: [PATCH v3 1/2] wcn36xx: Transition driver to SMD client

[Kalle Valo]

Bjorn Andersson <bjorn.andersson@linaro.org> writes:

> On Fri 02 Sep 09:24 PDT 2016, Kalle Valo wrote:
>
>> Bjorn Andersson <bjorn.andersson@linaro.org> writes:
>> 
>> > --- 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
>> 
>> While I had this patch on my pending branch I noticed that I can't
>> compile wcn36xx on x86 anymore. This is actually quite inconvenient, for
>> example then it's easy to miss mac80211 API changes etc. Is there any
>> way we could continue build testing wcn36xx on x86 (or all) platforms?
>> 
>
> Sorry about that, we should at least be able to COMPILE_TEST it in
> non-qcom builds. Thanks for letting me know.

Yeah, that would be better. Even though it's a bit shame that
COMPILE_TEST disables DEBUG_INFO (I use the same build also for
development) so I need to toggle it on and off whenever I need debug
symbols. Oh well...

> And the driver should also depend on QCOM_WCNSS_CTRL, in the normal
> case.
>
> I'll respin this, unless you prefer an incremental patch for those
> changes(?)

Yes, please respin.

>> Also what about older platforms? Earlier I used wcn36xx on my Nexus 4
>> with help of backports project. I can't do that anymore, right?
>> 
>
> This has been tested on 8064, 8974 and 8916. So your Nexus 4 is covered.
>
> Unfortunately I don't have a Nexus 4, but we currently have Nexus 7
> (the 8064 version), Xperia Z, Xperia Z1 and DB410c using this chip and
> all four has been tested with this code.

Actually I meant running wcn36xx on older kernels, where your QCOM_SMD
is not yet supported.

> I've staged the PIL/remoteproc (firmware "loader") driver for v4.9, so
> with this patch the only thing missing to fill in the dts files is one
> clock from the RPM.

Nice.

> JFYI, There seems to be some race in the removal path, which I will look
> into. But I would prefer if we could merge this to make the driver
> usable, and more accessible to work on.

Sure, a race like that isn't that big of a deal compared to the benefits
your work brings. But it's good to document knows regressions to the
commit log anyway so that others can be prepared if they test it.

-- 
Kalle Valo