7 files changed, 305 insertions, 37 deletions

diff --git a/drivers/net/wireless/ath/ath9k/Kconfig b/drivers/net/wireless/ath/ath9k/Kconfig
index 5601cfd6a293..2d1247f61297 100644
--- a/drivers/net/wireless/ath/ath9k/Kconfig
+++ b/drivers/net/wireless/ath/ath9k/Kconfig
@@ -157,6 +157,22 @@ config ATH9K_PCOEM
 	depends on ATH9K
 	default y
 
+config ATH9K_PCI_NO_EEPROM
+	tristate "Atheros ath9k pci loader for EEPROM-less chips"
+	depends on ATH9K_PCI
+	default n
+	help
+	 This separate driver provides a loader in order to support the
+	 AR500X to AR92XX-generation of ath9k PCI(e) WiFi chips, which have
+	 their initialization data (which contains the real PCI Device ID
+	 that ath9k will need) stored together with the calibration data out
+	 of reach for the ath9k chip.
+
+	 These devices are usually various network appliances, routers or
+	 access Points and such.
+
+	 If unsure say N.
+
 config ATH9K_HTC
        tristate "Atheros HTC based wireless cards support"
        depends on USB && MAC80211
diff --git a/drivers/net/wireless/ath/ath9k/Makefile b/drivers/net/wireless/ath/ath9k/Makefile
index 15af0a836925..eff94bcd1f0a 100644
--- a/drivers/net/wireless/ath/ath9k/Makefile
+++ b/drivers/net/wireless/ath/ath9k/Makefile
@@ -77,3 +77,5 @@ ath9k_htc-y +=	htc_hst.o \
 ath9k_htc-$(CONFIG_ATH9K_HTC_DEBUGFS) += htc_drv_debug.o
 
 obj-$(CONFIG_ATH9K_HTC) += ath9k_htc.o
+
+obj-$(CONFIG_ATH9K_PCI_NO_EEPROM) += ath9k_pci_owl_loader.o
diff --git a/drivers/net/wireless/ath/ath9k/ath9k_pci_owl_loader.c b/drivers/net/wireless/ath/ath9k/ath9k_pci_owl_loader.c
new file mode 100644
index 000000000000..159490f5a111
--- /dev/null
+++ b/drivers/net/wireless/ath/ath9k/ath9k_pci_owl_loader.c
@@ -0,0 +1,215 @@
+// SPDX-License-Identifier: ISC
+/* Initialize Owl Emulation Devices
+ *
+ * Copyright (C) 2016 Christian Lamparter <chunkeey@gmail.com>
+ * Copyright (C) 2016 Martin Blumenstingl <martin.blumenstingl@googlemail.com>
+ *
+ * Some devices (like the Cisco Meraki Z1 Cloud Managed Teleworker Gateway)
+ * need to be able to initialize the PCIe wifi device. Normally, this is done
+ * during the early stages as a pci quirk.
+ * However, this isn't possible for devices which have the init code for the
+ * Atheros chip stored on UBI Volume on NAND. Hence, this module can be used to
+ * initialize the chip when the user-space is ready to extract the init code.
+ */
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/completion.h>
+#include <linux/etherdevice.h>
+#include <linux/firmware.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/ath9k_platform.h>
+
+struct owl_ctx {
+	struct completion eeprom_load;
+};
+
+#define EEPROM_FILENAME_LEN 100
+
+#define AR5416_EEPROM_MAGIC 0xa55a
+
+static int ath9k_pci_fixup(struct pci_dev *pdev, const u16 *cal_data,
+			   size_t cal_len)
+{
+	void __iomem *mem;
+	const void *cal_end = (void *)cal_data + cal_len;
+	const struct {
+		u16 reg;
+		u16 low_val;
+		u16 high_val;
+	} __packed * data;
+	u16 cmd;
+	u32 bar0;
+	bool swap_needed = false;
+
+	if (*cal_data != AR5416_EEPROM_MAGIC) {
+		if (*cal_data != swab16(AR5416_EEPROM_MAGIC)) {
+			dev_err(&pdev->dev, "invalid calibration data\n");
+			return -EINVAL;
+		}
+
+		dev_dbg(&pdev->dev, "calibration data needs swapping\n");
+		swap_needed = true;
+	}
+
+	dev_info(&pdev->dev, "fixup device configuration\n");
+
+	mem = pcim_iomap(pdev, 0, 0);
+	if (!mem) {
+		dev_err(&pdev->dev, "ioremap error\n");
+		return -EINVAL;
+	}
+
+	pci_read_config_dword(pdev, PCI_BASE_ADDRESS_0, &bar0);
+	pci_write_config_dword(pdev, PCI_BASE_ADDRESS_0,
+			       pci_resource_start(pdev, 0));
+	pci_read_config_word(pdev, PCI_COMMAND, &cmd);
+	cmd |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
+	pci_write_config_word(pdev, PCI_COMMAND, cmd);
+
+	/* set pointer to first reg address */
+	for (data = (const void *)(cal_data + 3);
+	     (const void *)data <= cal_end && data->reg != (u16)~0;
+	     data++) {
+		u32 val;
+		u16 reg;
+
+		reg = data->reg;
+		val = data->low_val;
+		val |= ((u32)data->high_val) << 16;
+
+		if (swap_needed) {
+			reg = swab16(reg);
+			val = swahb32(val);
+		}
+
+		__raw_writel(val, mem + reg);
+		usleep_range(100, 120);
+	}
+
+	pci_read_config_word(pdev, PCI_COMMAND, &cmd);
+	cmd &= ~(PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY);
+	pci_write_config_word(pdev, PCI_COMMAND, cmd);
+
+	pci_write_config_dword(pdev, PCI_BASE_ADDRESS_0, bar0);
+	pcim_iounmap(pdev, mem);
+
+	pci_disable_device(pdev);
+
+	return 0;
+}
+
+static void owl_fw_cb(const struct firmware *fw, void *context)
+{
+	struct pci_dev *pdev = (struct pci_dev *)context;
+	struct owl_ctx *ctx = (struct owl_ctx *)pci_get_drvdata(pdev);
+	struct pci_bus *bus;
+
+	complete(&ctx->eeprom_load);
+
+	if (!fw) {
+		dev_err(&pdev->dev, "no eeprom data received.\n");
+		goto release;
+	}
+
+	/* also note that we are doing *u16 operations on the file */
+	if (fw->size > 4096 || fw->size < 0x200 || (fw->size & 1) == 1) {
+		dev_err(&pdev->dev, "eeprom file has an invalid size.\n");
+		goto release;
+	}
+
+	if (ath9k_pci_fixup(pdev, (const u16 *)fw->data, fw->size))
+		goto release;
+
+	pci_lock_rescan_remove();
+	bus = pdev->bus;
+	pci_stop_and_remove_bus_device(pdev);
+	/* the device should come back with the proper
+	 * ProductId. But we have to initiate a rescan.
+	 */
+	pci_rescan_bus(bus);
+	pci_unlock_rescan_remove();
+
+release:
+	release_firmware(fw);
+}
+
+static const char *owl_get_eeprom_name(struct pci_dev *pdev)
+{
+	struct device *dev = &pdev->dev;
+	char *eeprom_name;
+
+	dev_dbg(dev, "using auto-generated eeprom filename\n");
+
+	eeprom_name = devm_kzalloc(dev, EEPROM_FILENAME_LEN, GFP_KERNEL);
+	if (!eeprom_name)
+		return NULL;
+
+	/* this should match the pattern used in ath9k/init.c */
+	scnprintf(eeprom_name, EEPROM_FILENAME_LEN, "ath9k-eeprom-pci-%s.bin",
+		  dev_name(dev));
+
+	return eeprom_name;
+}
+
+static int owl_probe(struct pci_dev *pdev,
+		     const struct pci_device_id *id)
+{
+	struct owl_ctx *ctx;
+	const char *eeprom_name;
+	int err = 0;
+
+	if (pcim_enable_device(pdev))
+		return -EIO;
+
+	pcim_pin_device(pdev);
+
+	eeprom_name = owl_get_eeprom_name(pdev);
+	if (!eeprom_name) {
+		dev_err(&pdev->dev, "no eeprom filename found.\n");
+		return -ENODEV;
+	}
+
+	ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
+	if (!ctx)
+		return -ENOMEM;
+
+	init_completion(&ctx->eeprom_load);
+
+	pci_set_drvdata(pdev, ctx);
+	err = request_firmware_nowait(THIS_MODULE, true, eeprom_name,
+				      &pdev->dev, GFP_KERNEL, pdev, owl_fw_cb);
+	if (err)
+		dev_err(&pdev->dev, "failed to request caldata (%d).\n", err);
+
+	return err;
+}
+
+static void owl_remove(struct pci_dev *pdev)
+{
+	struct owl_ctx *ctx = pci_get_drvdata(pdev);
+
+	if (ctx) {
+		wait_for_completion(&ctx->eeprom_load);
+		pci_set_drvdata(pdev, NULL);
+	}
+}
+
+static const struct pci_device_id owl_pci_table[] = {
+	{ PCI_VDEVICE(ATHEROS, 0xff1c) }, /* PCIe */
+	{ PCI_VDEVICE(ATHEROS, 0xff1d) }, /* PCI */
+	{ },
+};
+MODULE_DEVICE_TABLE(pci, owl_pci_table);
+
+static struct pci_driver owl_driver = {
+	.name		= KBUILD_MODNAME,
+	.id_table	= owl_pci_table,
+	.probe		= owl_probe,
+	.remove		= owl_remove,
+};
+module_pci_driver(owl_driver);
+MODULE_AUTHOR("Christian Lamparter <chunkeey@gmail.com>");
+MODULE_DESCRIPTION("External EEPROM data loader for Atheros AR500X to AR92XX");
+MODULE_LICENSE("Dual BSD/GPL");
diff --git a/drivers/net/wireless/ath/ath9k/dynack.c b/drivers/net/wireless/ath/ath9k/dynack.c
index f112fa5b2eac..fbeb4a739d32 100644
--- a/drivers/net/wireless/ath/ath9k/dynack.c
+++ b/drivers/net/wireless/ath/ath9k/dynack.c
@@ -20,12 +20,31 @@
 
 #define COMPUTE_TO		(5 * HZ)
 #define LATEACK_DELAY		(10 * HZ)
-#define LATEACK_TO		256
-#define MAX_DELAY		300
 #define EWMA_LEVEL		96
 #define EWMA_DIV		128
 
 /**
+ * ath_dynack_get_max_to - set max timeout according to channel width
+ * @ah: ath hw
+ *
+ */
+static u32 ath_dynack_get_max_to(struct ath_hw *ah)
+{
+	const struct ath9k_channel *chan = ah->curchan;
+
+	if (!chan)
+		return 300;
+
+	if (IS_CHAN_HT40(chan))
+		return 300;
+	if (IS_CHAN_HALF_RATE(chan))
+		return 750;
+	if (IS_CHAN_QUARTER_RATE(chan))
+		return 1500;
+	return 600;
+}
+
+/**
  * ath_dynack_ewma - EWMA (Exponentially Weighted Moving Average) calculation
  *
  */
@@ -79,6 +98,24 @@ static inline bool ath_dynack_bssidmask(struct ath_hw *ah, const u8 *mac)
 }
 
 /**
+ * ath_dynack_set_timeout - configure timeouts/slottime registers
+ * @ah: ath hw
+ * @to: timeout value
+ *
+ */
+static void ath_dynack_set_timeout(struct ath_hw *ah, int to)
+{
+	struct ath_common *common = ath9k_hw_common(ah);
+	int slottime = (to - 3) / 2;
+
+	ath_dbg(common, DYNACK, "ACK timeout %u slottime %u\n",
+		to, slottime);
+	ath9k_hw_setslottime(ah, slottime);
+	ath9k_hw_set_ack_timeout(ah, to);
+	ath9k_hw_set_cts_timeout(ah, to);
+}
+
+/**
  * ath_dynack_compute_ackto - compute ACK timeout as the maximum STA timeout
  * @ah: ath hw
  *
@@ -86,7 +123,6 @@ static inline bool ath_dynack_bssidmask(struct ath_hw *ah, const u8 *mac)
  */
 static void ath_dynack_compute_ackto(struct ath_hw *ah)
 {
-	struct ath_common *common = ath9k_hw_common(ah);
 	struct ath_dynack *da = &ah->dynack;
 	struct ath_node *an;
 	int to = 0;
@@ -96,15 +132,8 @@ static void ath_dynack_compute_ackto(struct ath_hw *ah)
 			to = an->ackto;
 
 	if (to && da->ackto != to) {
-		u32 slottime;
-
-		slottime = (to - 3) / 2;
+		ath_dynack_set_timeout(ah, to);
 		da->ackto = to;
-		ath_dbg(common, DYNACK, "ACK timeout %u slottime %u\n",
-			da->ackto, slottime);
-		ath9k_hw_setslottime(ah, slottime);
-		ath9k_hw_set_ack_timeout(ah, da->ackto);
-		ath9k_hw_set_cts_timeout(ah, da->ackto);
 	}
 }
 
@@ -116,15 +145,16 @@ static void ath_dynack_compute_ackto(struct ath_hw *ah)
  */
 static void ath_dynack_compute_to(struct ath_hw *ah)
 {
-	u32 ackto, ack_ts;
-	u8 *dst, *src;
+	struct ath_dynack *da = &ah->dynack;
+	u32 ackto, ack_ts, max_to;
 	struct ieee80211_sta *sta;
-	struct ath_node *an;
 	struct ts_info *st_ts;
-	struct ath_dynack *da = &ah->dynack;
+	struct ath_node *an;
+	u8 *dst, *src;
 
 	rcu_read_lock();
 
+	max_to = ath_dynack_get_max_to(ah);
 	while (da->st_rbf.h_rb != da->st_rbf.t_rb &&
 	       da->ack_rbf.h_rb != da->ack_rbf.t_rb) {
 		ack_ts = da->ack_rbf.tstamp[da->ack_rbf.h_rb];
@@ -140,7 +170,7 @@ static void ath_dynack_compute_to(struct ath_hw *ah)
 		if (ack_ts > st_ts->tstamp + st_ts->dur) {
 			ackto = ack_ts - st_ts->tstamp - st_ts->dur;
 
-			if (ackto < MAX_DELAY) {
+			if (ackto < max_to) {
 				sta = ieee80211_find_sta_by_ifaddr(ah->hw, dst,
 								   src);
 				if (sta) {
@@ -197,11 +227,10 @@ void ath_dynack_sample_tx_ts(struct ath_hw *ah, struct sk_buff *skb,
 		if (ieee80211_is_assoc_req(hdr->frame_control) ||
 		    ieee80211_is_assoc_resp(hdr->frame_control) ||
 		    ieee80211_is_auth(hdr->frame_control)) {
-			ath_dbg(common, DYNACK, "late ack\n");
+			u32 max_to = ath_dynack_get_max_to(ah);
 
-			ath9k_hw_setslottime(ah, (LATEACK_TO - 3) / 2);
-			ath9k_hw_set_ack_timeout(ah, LATEACK_TO);
-			ath9k_hw_set_cts_timeout(ah, LATEACK_TO);
+			ath_dbg(common, DYNACK, "late ack\n");
+			ath_dynack_set_timeout(ah, max_to);
 			if (sta) {
 				struct ath_node *an;
 
@@ -292,15 +321,13 @@ EXPORT_SYMBOL(ath_dynack_sample_ack_ts);
  */
 void ath_dynack_node_init(struct ath_hw *ah, struct ath_node *an)
 {
-	/* ackto = slottime + sifs + air delay */
-	u32 ackto = 9 + 16 + 64;
 	struct ath_dynack *da = &ah->dynack;
 
-	an->ackto = ackto;
+	an->ackto = da->ackto;
 
-	spin_lock(&da->qlock);
+	spin_lock_bh(&da->qlock);
 	list_add_tail(&an->list, &da->nodes);
-	spin_unlock(&da->qlock);
+	spin_unlock_bh(&da->qlock);
 }
 EXPORT_SYMBOL(ath_dynack_node_init);
 
@@ -314,9 +341,9 @@ void ath_dynack_node_deinit(struct ath_hw *ah, struct ath_node *an)
 {
 	struct ath_dynack *da = &ah->dynack;
 
-	spin_lock(&da->qlock);
+	spin_lock_bh(&da->qlock);
 	list_del(&an->list);
-	spin_unlock(&da->qlock);
+	spin_unlock_bh(&da->qlock);
 }
 EXPORT_SYMBOL(ath_dynack_node_deinit);
 
@@ -327,22 +354,26 @@ EXPORT_SYMBOL(ath_dynack_node_deinit);
  */
 void ath_dynack_reset(struct ath_hw *ah)
 {
-	/* ackto = slottime + sifs + air delay */
-	u32 ackto = 9 + 16 + 64;
 	struct ath_dynack *da = &ah->dynack;
+	struct ath_node *an;
+
+	spin_lock_bh(&da->qlock);
 
-	da->lto = jiffies;
-	da->ackto = ackto;
+	da->lto = jiffies + COMPUTE_TO;
 
 	da->st_rbf.t_rb = 0;
 	da->st_rbf.h_rb = 0;
 	da->ack_rbf.t_rb = 0;
 	da->ack_rbf.h_rb = 0;
 
+	da->ackto = ath_dynack_get_max_to(ah);
+	list_for_each_entry(an, &da->nodes, list)
+		an->ackto = da->ackto;
+
 	/* init acktimeout */
-	ath9k_hw_setslottime(ah, (ackto - 3) / 2);
-	ath9k_hw_set_ack_timeout(ah, ackto);
-	ath9k_hw_set_cts_timeout(ah, ackto);
+	ath_dynack_set_timeout(ah, da->ackto);
+
+	spin_unlock_bh(&da->qlock);
 }
 EXPORT_SYMBOL(ath_dynack_reset);
 
@@ -359,6 +390,8 @@ void ath_dynack_init(struct ath_hw *ah)
 
 	spin_lock_init(&da->qlock);
 	INIT_LIST_HEAD(&da->nodes);
+	/* ackto = slottime + sifs + air delay */
+	da->ackto = 9 + 16 + 64;
 
 	ah->hw->wiphy->features |= NL80211_FEATURE_ACKTO_ESTIMATION;
 }
diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_init.c b/drivers/net/wireless/ath/ath9k/htc_drv_init.c
index 214c68269a69..d961095ab01f 100644
--- a/drivers/net/wireless/ath/ath9k/htc_drv_init.c
+++ b/drivers/net/wireless/ath/ath9k/htc_drv_init.c
@@ -463,7 +463,7 @@ static void ath9k_enable_rmw_buffer(void *hw_priv)
 	atomic_inc(&priv->wmi->m_rmw_cnt);
 }
 
-static u32 ath9k_reg_rmw_single(void *hw_priv,
+static void ath9k_reg_rmw_single(void *hw_priv,
 				 u32 reg_offset, u32 set, u32 clr)
 {
 	struct ath_hw *ah = hw_priv;
@@ -471,7 +471,6 @@ static u32 ath9k_reg_rmw_single(void *hw_priv,
 	struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *) common->priv;
 	struct register_rmw buf, buf_ret;
 	int ret;
-	u32 val = 0;
 
 	buf.reg = cpu_to_be32(reg_offset);
 	buf.set = cpu_to_be32(set);
@@ -485,7 +484,6 @@ static u32 ath9k_reg_rmw_single(void *hw_priv,
 		ath_dbg(common, WMI, "REGISTER RMW FAILED:(0x%04x, %d)\n",
 			reg_offset, ret);
 	}
-	return val;
 }
 
 static u32 ath9k_reg_rmw(void *hw_priv, u32 reg_offset, u32 set, u32 clr)
diff --git a/drivers/net/wireless/ath/ath9k/htc_hst.c b/drivers/net/wireless/ath/ath9k/htc_hst.c
index 1bf63a4efb4c..d091c8ebdcf0 100644
--- a/drivers/net/wireless/ath/ath9k/htc_hst.c
+++ b/drivers/net/wireless/ath/ath9k/htc_hst.c
@@ -170,6 +170,7 @@ static int htc_config_pipe_credits(struct htc_target *target)
 	time_left = wait_for_completion_timeout(&target->cmd_wait, HZ);
 	if (!time_left) {
 		dev_err(target->dev, "HTC credit config timeout\n");
+		kfree_skb(skb);
 		return -ETIMEDOUT;
 	}
 
@@ -205,6 +206,7 @@ static int htc_setup_complete(struct htc_target *target)
 	time_left = wait_for_completion_timeout(&target->cmd_wait, HZ);
 	if (!time_left) {
 		dev_err(target->dev, "HTC start timeout\n");
+		kfree_skb(skb);
 		return -ETIMEDOUT;
 	}
 
@@ -277,6 +279,7 @@ int htc_connect_service(struct htc_target *target,
 	if (!time_left) {
 		dev_err(target->dev, "Service connection timeout for: %d\n",
 			service_connreq->service_id);
+		kfree_skb(skb);
 		return -ETIMEDOUT;
 	}
 
diff --git a/drivers/net/wireless/ath/ath9k/wmi.c b/drivers/net/wireless/ath/ath9k/wmi.c
index d1f6710ca63b..cdc146091194 100644
--- a/drivers/net/wireless/ath/ath9k/wmi.c
+++ b/drivers/net/wireless/ath/ath9k/wmi.c
@@ -336,6 +336,7 @@ int ath9k_wmi_cmd(struct wmi *wmi, enum wmi_cmd_id cmd_id,
 		ath_dbg(common, WMI, "Timeout waiting for WMI command: %s\n",
 			wmi_cmd_to_name(cmd_id));
 		mutex_unlock(&wmi->op_mutex);
+		kfree_skb(skb);
 		return -ETIMEDOUT;
 	}