From fe9ee51e6a43a79d9c6bf92124b4db542157aed3 Mon Sep 17 00:00:00 2001
From: Maya Erez <qca_merez@qca.qualcomm.com>
Date: Fri, 16 Jun 2017 10:38:04 +0300
Subject: [PATCH] wil6210: add support for PCIe D3hot in system suspend
Git-commit: fe9ee51e6a43a79d9c6bf92124b4db542157aed3
Patch-mainline: v4.13-rc1
References: FATE#326906
In order to preserve the connection in suspend/resume flow,
wil6210 host allows going to PCIe D3hot state in suspend,
instead of performing a full wil6210 device reset. This
requires the platform ability to initiate wakeup in case of
RX data. To check that, a new platform API is added.
In addition, add cfg80211 suspend/resume callbacks
implementation.
Signed-off-by: Maya Erez <qca_merez@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/net/wireless/ath/wil6210/cfg80211.c | 38 +++
drivers/net/wireless/ath/wil6210/debugfs.c | 49 ++++
drivers/net/wireless/ath/wil6210/interrupt.c | 6 +
drivers/net/wireless/ath/wil6210/main.c | 7 +-
drivers/net/wireless/ath/wil6210/pcie_bus.c | 50 ++--
drivers/net/wireless/ath/wil6210/pm.c | 228 ++++++++++++++++--
drivers/net/wireless/ath/wil6210/txrx.c | 71 ++++++
drivers/net/wireless/ath/wil6210/wil6210.h | 26 ++
.../net/wireless/ath/wil6210/wil_platform.h | 7 +-
drivers/net/wireless/ath/wil6210/wmi.c | 143 +++++++++++
drivers/net/wireless/ath/wil6210/wmi.h | 27 ++-
11 files changed, 603 insertions(+), 49 deletions(-)
diff --git a/drivers/net/wireless/ath/wil6210/cfg80211.c b/drivers/net/wireless/ath/wil6210/cfg80211.c
index 567fe43b5cf8..0b5383a62d42 100644
--- a/drivers/net/wireless/ath/wil6210/cfg80211.c
+++ b/drivers/net/wireless/ath/wil6210/cfg80211.c
@@ -1694,6 +1694,42 @@ static int wil_cfg80211_set_power_mgmt(struct wiphy *wiphy,
return wil_ps_update(wil, ps_profile);
}
+static int wil_cfg80211_suspend(struct wiphy *wiphy,
+ struct cfg80211_wowlan *wow)
+{
+ struct wil6210_priv *wil = wiphy_to_wil(wiphy);
+ int rc;
+
+ /* Setting the wakeup trigger based on wow is TBD */
+
+ if (test_bit(wil_status_suspended, wil->status)) {
+ wil_dbg_pm(wil, "trying to suspend while suspended\n");
+ return 0;
+ }
+
+ rc = wil_can_suspend(wil, false);
+ if (rc)
+ goto out;
+
+ wil_dbg_pm(wil, "suspending\n");
+
+ wil_p2p_stop_discovery(wil);
+
+ wil_abort_scan(wil, true);
+
+out:
+ return rc;
+}
+
+static int wil_cfg80211_resume(struct wiphy *wiphy)
+{
+ struct wil6210_priv *wil = wiphy_to_wil(wiphy);
+
+ wil_dbg_pm(wil, "resuming\n");
+
+ return 0;
+}
+
static const struct cfg80211_ops wil_cfg80211_ops = {
.add_virtual_intf = wil_cfg80211_add_iface,
.del_virtual_intf = wil_cfg80211_del_iface,
@@ -1725,6 +1761,8 @@ static const struct cfg80211_ops wil_cfg80211_ops = {
.start_p2p_device = wil_cfg80211_start_p2p_device,
.stop_p2p_device = wil_cfg80211_stop_p2p_device,
.set_power_mgmt = wil_cfg80211_set_power_mgmt,
+ .suspend = wil_cfg80211_suspend,
+ .resume = wil_cfg80211_resume,
};
static void wil_wiphy_init(struct wiphy *wiphy)
diff --git a/drivers/net/wireless/ath/wil6210/debugfs.c b/drivers/net/wireless/ath/wil6210/debugfs.c
index 5b0f9fc66bb6..f82506d276d3 100644
--- a/drivers/net/wireless/ath/wil6210/debugfs.c
+++ b/drivers/net/wireless/ath/wil6210/debugfs.c
@@ -509,6 +509,10 @@ static ssize_t wil_read_file_ioblob(struct file *file, char __user *user_buf,
void *buf;
size_t ret;
+ if (test_bit(wil_status_suspending, wil_blob->wil->status) ||
+ test_bit(wil_status_suspended, wil_blob->wil->status))
+ return 0;
+
if (pos < 0)
return -EINVAL;
@@ -1600,6 +1604,49 @@ static const struct file_operations fops_fw_version = {
.llseek = seq_lseek,
};
+/*---------suspend_stats---------*/
+static ssize_t wil_write_suspend_stats(struct file *file,
+ const char __user *buf,
+ size_t len, loff_t *ppos)
+{
+ struct wil6210_priv *wil = file->private_data;
+
+ memset(&wil->suspend_stats, 0, sizeof(wil->suspend_stats));
+
+ return len;
+}
+
+static ssize_t wil_read_suspend_stats(struct file *file,
+ char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ struct wil6210_priv *wil = file->private_data;
+ static char text[400];
+ int n;
+
+ n = snprintf(text, sizeof(text),
+ "Suspend statistics:\n"
+ "successful suspends:%ld failed suspends:%ld\n"
+ "successful resumes:%ld failed resumes:%ld\n"
+ "rejected by host:%ld rejected by device:%ld\n",
+ wil->suspend_stats.successful_suspends,
+ wil->suspend_stats.failed_suspends,
+ wil->suspend_stats.successful_resumes,
+ wil->suspend_stats.failed_resumes,
+ wil->suspend_stats.rejected_by_host,
+ wil->suspend_stats.rejected_by_device);
+
+ n = min_t(int, n, sizeof(text));
+
+ return simple_read_from_buffer(user_buf, count, ppos, text, n);
+}
+
+static const struct file_operations fops_suspend_stats = {
+ .read = wil_read_suspend_stats,
+ .write = wil_write_suspend_stats,
+ .open = simple_open,
+};
+
/*----------------*/
static void wil6210_debugfs_init_blobs(struct wil6210_priv *wil,
struct dentry *dbg)
@@ -1652,6 +1699,7 @@ static const struct {
{"led_blink_time", 0644, &fops_led_blink_time},
{"fw_capabilities", 0444, &fops_fw_capabilities},
{"fw_version", 0444, &fops_fw_version},
+ {"suspend_stats", 0644, &fops_suspend_stats},
};
static void wil6210_debugfs_init_files(struct wil6210_priv *wil,
@@ -1698,6 +1746,7 @@ static const struct dbg_off dbg_wil_off[] = {
WIL_FIELD(discovery_mode, 0644, doff_u8),
WIL_FIELD(chip_revision, 0444, doff_u8),
WIL_FIELD(abft_len, 0644, doff_u8),
+ WIL_FIELD(wakeup_trigger, 0644, doff_u8),
{},
};
diff --git a/drivers/net/wireless/ath/wil6210/interrupt.c b/drivers/net/wireless/ath/wil6210/interrupt.c
index cab1e5c0e374..cad8a95c4e4e 100644
--- a/drivers/net/wireless/ath/wil6210/interrupt.c
+++ b/drivers/net/wireless/ath/wil6210/interrupt.c
@@ -467,6 +467,12 @@ static irqreturn_t wil6210_thread_irq(int irq, void *cookie)
wil6210_unmask_irq_pseudo(wil);
+ if (wil->suspend_resp_rcvd) {
+ wil_dbg_irq(wil, "set suspend_resp_comp to true\n");
+ wil->suspend_resp_comp = true;
+ wake_up_interruptible(&wil->wq);
+ }
+
return IRQ_HANDLED;
}
diff --git a/drivers/net/wireless/ath/wil6210/main.c b/drivers/net/wireless/ath/wil6210/main.c
index 32086792dfc3..daf944a71901 100644
--- a/drivers/net/wireless/ath/wil6210/main.c
+++ b/drivers/net/wireless/ath/wil6210/main.c
@@ -576,6 +576,9 @@ int wil_priv_init(struct wil6210_priv *wil)
wil->ps_profile = WMI_PS_PROFILE_TYPE_DEFAULT;
+ wil->wakeup_trigger = WMI_WAKEUP_TRIGGER_UCAST |
+ WMI_WAKEUP_TRIGGER_BCAST;
+
return 0;
out_wmi_wq:
@@ -586,8 +589,10 @@ int wil_priv_init(struct wil6210_priv *wil)
void wil6210_bus_request(struct wil6210_priv *wil, u32 kbps)
{
- if (wil->platform_ops.bus_request)
+ if (wil->platform_ops.bus_request) {
+ wil->bus_request_kbps = kbps;
wil->platform_ops.bus_request(wil->platform_handle, kbps);
+ }
}
/**
diff --git a/drivers/net/wireless/ath/wil6210/pcie_bus.c b/drivers/net/wireless/ath/wil6210/pcie_bus.c
index a874d8dfa198..d571feb2370e 100644
--- a/drivers/net/wireless/ath/wil6210/pcie_bus.c
+++ b/drivers/net/wireless/ath/wil6210/pcie_bus.c
@@ -112,8 +112,6 @@ static int wil_if_pcie_enable(struct wil6210_priv *wil)
wil_dbg_misc(wil, "if_pcie_enable, wmi_only %d\n", wmi_only);
- pdev->msi_enabled = 0;
-
pci_set_master(pdev);
wil_dbg_misc(wil, "Setup %s interrupt\n", use_msi ? "MSI" : "INTx");
@@ -259,7 +257,7 @@ static int wil_pcie_probe(struct pci_dev *pdev, const struct pci_device_id *id)
}
rc = pci_enable_device(pdev);
- if (rc) {
+ if (rc && pdev->msi_enabled == 0) {
wil_err(wil,
"pci_enable_device failed, retry with MSI only\n");
/* Work around for platforms that can't allocate IRQ:
@@ -274,6 +272,7 @@ static int wil_pcie_probe(struct pci_dev *pdev, const struct pci_device_id *id)
goto err_plat;
}
/* rollback to err_disable_pdev */
+ pci_set_power_state(pdev, PCI_D0);
rc = pci_request_region(pdev, 0, WIL_NAME);
if (rc) {
@@ -294,6 +293,15 @@ static int wil_pcie_probe(struct pci_dev *pdev, const struct pci_device_id *id)
wil_set_capabilities(wil);
wil6210_clear_irq(wil);
+ wil->keep_radio_on_during_sleep =
+ wil->platform_ops.keep_radio_on_during_sleep &&
+ wil->platform_ops.keep_radio_on_during_sleep(
+ wil->platform_handle) &&
+ test_bit(WMI_FW_CAPABILITY_D3_SUSPEND, wil->fw_capabilities);
+
+ wil_info(wil, "keep_radio_on_during_sleep (%d)\n",
+ wil->keep_radio_on_during_sleep);
+
/* FW should raise IRQ when ready */
rc = wil_if_pcie_enable(wil);
if (rc) {
@@ -390,15 +398,16 @@ static int wil6210_suspend(struct device *dev, bool is_runtime)
goto out;
rc = wil_suspend(wil, is_runtime);
- if (rc)
- goto out;
-
- /* TODO: how do I bring card in low power state? */
-
- /* disable bus mastering */
- pci_clear_master(pdev);
- /* PCI will call pci_save_state(pdev) and pci_prepare_to_sleep(pdev) */
+ if (!rc) {
+ wil->suspend_stats.successful_suspends++;
+ /* If platform device supports keep_radio_on_during_sleep
+ * it will control PCIe master
+ */
+ if (!wil->keep_radio_on_during_sleep)
+ /* disable bus mastering */
+ pci_clear_master(pdev);
+ }
out:
return rc;
}
@@ -411,12 +420,21 @@ static int wil6210_resume(struct device *dev, bool is_runtime)
wil_dbg_pm(wil, "resume: %s\n", is_runtime ? "runtime" : "system");
- /* allow master */
- pci_set_master(pdev);
-
+ /* If platform device supports keep_radio_on_during_sleep it will
+ * control PCIe master
+ */
+ if (!wil->keep_radio_on_during_sleep)
+ /* allow master */
+ pci_set_master(pdev);
rc = wil_resume(wil, is_runtime);
- if (rc)
- pci_clear_master(pdev);
+ if (rc) {
+ wil_err(wil, "device failed to resume (%d)\n", rc);
+ wil->suspend_stats.failed_resumes++;
+ if (!wil->keep_radio_on_during_sleep)
+ pci_clear_master(pdev);
+ } else {
+ wil->suspend_stats.successful_resumes++;
+ }
return rc;
}
diff --git a/drivers/net/wireless/ath/wil6210/pm.c b/drivers/net/wireless/ath/wil6210/pm.c
index 2ae4fe85cc8c..ce1f384e7f8e 100644
--- a/drivers/net/wireless/ath/wil6210/pm.c
+++ b/drivers/net/wireless/ath/wil6210/pm.c
@@ -15,6 +15,7 @@
*/
#include "wil6210.h"
+#include <linux/jiffies.h>
int wil_can_suspend(struct wil6210_priv *wil, bool is_runtime)
{
@@ -61,20 +62,170 @@ int wil_can_suspend(struct wil6210_priv *wil, bool is_runtime)
wil_dbg_pm(wil, "can_suspend: %s => %s (%d)\n",
is_runtime ? "runtime" : "system", rc ? "No" : "Yes", rc);
+ if (rc)
+ wil->suspend_stats.rejected_by_host++;
+
return rc;
}
-int wil_suspend(struct wil6210_priv *wil, bool is_runtime)
+static int wil_resume_keep_radio_on(struct wil6210_priv *wil)
{
int rc = 0;
- struct net_device *ndev = wil_to_ndev(wil);
- wil_dbg_pm(wil, "suspend: %s\n", is_runtime ? "runtime" : "system");
+ /* wil_status_resuming will be cleared when getting
+ * WMI_TRAFFIC_RESUME_EVENTID
+ */
+ set_bit(wil_status_resuming, wil->status);
+ clear_bit(wil_status_suspended, wil->status);
+ wil_c(wil, RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);
+ wil_unmask_irq(wil);
- if (test_bit(wil_status_suspended, wil->status)) {
- wil_dbg_pm(wil, "trying to suspend while suspended\n");
- return 0;
+ wil6210_bus_request(wil, wil->bus_request_kbps_pre_suspend);
+
+ /* Send WMI resume request to the device */
+ rc = wmi_resume(wil);
+ if (rc) {
+ wil_err(wil, "device failed to resume (%d), resetting\n", rc);
+ rc = wil_down(wil);
+ if (rc) {
+ wil_err(wil, "wil_down failed (%d)\n", rc);
+ goto out;
+ }
+ rc = wil_up(wil);
+ if (rc) {
+ wil_err(wil, "wil_up failed (%d)\n", rc);
+ goto out;
+ }
+ }
+
+ /* Wake all queues */
+ if (test_bit(wil_status_fwconnected, wil->status))
+ wil_update_net_queues_bh(wil, NULL, false);
+
+out:
+ if (rc)
+ set_bit(wil_status_suspended, wil->status);
+ return rc;
+}
+
+static int wil_suspend_keep_radio_on(struct wil6210_priv *wil)
+{
+ int rc = 0;
+ unsigned long start, data_comp_to;
+
+ wil_dbg_pm(wil, "suspend keep radio on\n");
+
+ /* Prevent handling of new tx and wmi commands */
+ set_bit(wil_status_suspending, wil->status);
+ wil_update_net_queues_bh(wil, NULL, true);
+
+ if (!wil_is_tx_idle(wil)) {
+ wil_dbg_pm(wil, "Pending TX data, reject suspend\n");
+ wil->suspend_stats.rejected_by_host++;
+ goto reject_suspend;
+ }
+
+ if (!wil_is_rx_idle(wil)) {
+ wil_dbg_pm(wil, "Pending RX data, reject suspend\n");
+ wil->suspend_stats.rejected_by_host++;
+ goto reject_suspend;
+ }
+
+ if (!wil_is_wmi_idle(wil)) {
+ wil_dbg_pm(wil, "Pending WMI events, reject suspend\n");
+ wil->suspend_stats.rejected_by_host++;
+ goto reject_suspend;
+ }
+
+ /* Send WMI suspend request to the device */
+ rc = wmi_suspend(wil);
+ if (rc) {
+ wil_dbg_pm(wil, "wmi_suspend failed, reject suspend (%d)\n",
+ rc);
+ goto reject_suspend;
+ }
+
+ /* Wait for completion of the pending RX packets */
+ start = jiffies;
+ data_comp_to = jiffies + msecs_to_jiffies(WIL_DATA_COMPLETION_TO_MS);
+ if (test_bit(wil_status_napi_en, wil->status)) {
+ while (!wil_is_rx_idle(wil)) {
+ if (time_after(jiffies, data_comp_to)) {
+ if (wil_is_rx_idle(wil))
+ break;
+ wil_err(wil,
+ "TO waiting for idle RX, suspend failed\n");
+ wil->suspend_stats.failed_suspends++;
+ goto resume_after_fail;
+ }
+ wil_dbg_ratelimited(wil, "rx vring is not empty -> NAPI\n");
+ napi_synchronize(&wil->napi_rx);
+ msleep(20);
+ }
+ }
+
+ /* In case of pending WMI events, reject the suspend
+ * and resume the device.
+ * This can happen if the device sent the WMI events before
+ * approving the suspend.
+ */
+ if (!wil_is_wmi_idle(wil)) {
+ wil_err(wil, "suspend failed due to pending WMI events\n");
+ wil->suspend_stats.failed_suspends++;
+ goto resume_after_fail;
+ }
+
+ wil_mask_irq(wil);
+
+ /* Disable device reset on PERST */
+ wil_s(wil, RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);
+
+ if (wil->platform_ops.suspend) {
+ rc = wil->platform_ops.suspend(wil->platform_handle, true);
+ if (rc) {
+ wil_err(wil, "platform device failed to suspend (%d)\n",
+ rc);
+ wil->suspend_stats.failed_suspends++;
+ wil_c(wil, RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);
+ wil_unmask_irq(wil);
+ goto resume_after_fail;
+ }
+ }
+
+ /* Save the current bus request to return to the same in resume */
+ wil->bus_request_kbps_pre_suspend = wil->bus_request_kbps;
+ wil6210_bus_request(wil, 0);
+
+ set_bit(wil_status_suspended, wil->status);
+ clear_bit(wil_status_suspending, wil->status);
+
+ return rc;
+
+resume_after_fail:
+ set_bit(wil_status_resuming, wil->status);
+ clear_bit(wil_status_suspending, wil->status);
+ rc = wmi_resume(wil);
+ /* if resume succeeded, reject the suspend */
+ if (!rc) {
+ rc = -EBUSY;
+ if (test_bit(wil_status_fwconnected, wil->status))
+ wil_update_net_queues_bh(wil, NULL, false);
}
+ return rc;
+
+reject_suspend:
+ clear_bit(wil_status_suspending, wil->status);
+ if (test_bit(wil_status_fwconnected, wil->status))
+ wil_update_net_queues_bh(wil, NULL, false);
+ return -EBUSY;
+}
+
+static int wil_suspend_radio_off(struct wil6210_priv *wil)
+{
+ int rc = 0;
+ struct net_device *ndev = wil_to_ndev(wil);
+
+ wil_dbg_pm(wil, "suspend radio off\n");
/* if netif up, hardware is alive, shut it down */
if (ndev->flags & IFF_UP) {
@@ -90,7 +241,7 @@ int wil_suspend(struct wil6210_priv *wil, bool is_runtime)
wil_disable_irq(wil);
if (wil->platform_ops.suspend) {
- rc = wil->platform_ops.suspend(wil->platform_handle);
+ rc = wil->platform_ops.suspend(wil->platform_handle, false);
if (rc) {
wil_enable_irq(wil);
goto out;
@@ -100,6 +251,50 @@ int wil_suspend(struct wil6210_priv *wil, bool is_runtime)
set_bit(wil_status_suspended, wil->status);
out:
+ wil_dbg_pm(wil, "suspend radio off: %d\n", rc);
+
+ return rc;
+}
+
+static int wil_resume_radio_off(struct wil6210_priv *wil)
+{
+ int rc = 0;
+ struct net_device *ndev = wil_to_ndev(wil);
+
+ wil_dbg_pm(wil, "Enabling PCIe IRQ\n");
+ wil_enable_irq(wil);
+ /* if netif up, bring hardware up
+ * During open(), IFF_UP set after actual device method
+ * invocation. This prevent recursive call to wil_up()
+ * wil_status_suspended will be cleared in wil_reset
+ */
+ if (ndev->flags & IFF_UP)
+ rc = wil_up(wil);
+ else
+ clear_bit(wil_status_suspended, wil->status);
+
+ return rc;
+}
+
+int wil_suspend(struct wil6210_priv *wil, bool is_runtime)
+{
+ int rc = 0;
+ struct net_device *ndev = wil_to_ndev(wil);
+ bool keep_radio_on = ndev->flags & IFF_UP &&
+ wil->keep_radio_on_during_sleep;
+
+ wil_dbg_pm(wil, "suspend: %s\n", is_runtime ? "runtime" : "system");
+
+ if (test_bit(wil_status_suspended, wil->status)) {
+ wil_dbg_pm(wil, "trying to suspend while suspended\n");
+ return 0;
+ }
+
+ if (!keep_radio_on)
+ rc = wil_suspend_radio_off(wil);
+ else
+ rc = wil_suspend_keep_radio_on(wil);
+
wil_dbg_pm(wil, "suspend: %s => %d\n",
is_runtime ? "runtime" : "system", rc);
@@ -110,29 +305,24 @@ int wil_resume(struct wil6210_priv *wil, bool is_runtime)
{
int rc = 0;
struct net_device *ndev = wil_to_ndev(wil);
+ bool keep_radio_on = ndev->flags & IFF_UP &&
+ wil->keep_radio_on_during_sleep;
wil_dbg_pm(wil, "resume: %s\n", is_runtime ? "runtime" : "system");
if (wil->platform_ops.resume) {
- rc = wil->platform_ops.resume(wil->platform_handle);
+ rc = wil->platform_ops.resume(wil->platform_handle,
+ keep_radio_on);
if (rc) {
wil_err(wil, "platform_ops.resume : %d\n", rc);
goto out;
}
}
- wil_dbg_pm(wil, "Enabling PCIe IRQ\n");
- wil_enable_irq(wil);
-
- /* if netif up, bring hardware up
- * During open(), IFF_UP set after actual device method
- * invocation. This prevent recursive call to wil_up().
- * wil_status_suspended will be cleared in wil_reset
- */
- if (ndev->flags & IFF_UP)
- rc = wil_up(wil);
+ if (keep_radio_on)
+ rc = wil_resume_keep_radio_on(wil);
else
- clear_bit(wil_status_suspended, wil->status);
+ rc = wil_resume_radio_off(wil);
out:
wil_dbg_pm(wil, "resume: %s => %d\n",
diff --git a/drivers/net/wireless/ath/wil6210/txrx.c b/drivers/net/wireless/ath/wil6210/txrx.c
index edab4c0a900f..34ef57c7c782 100644
--- a/drivers/net/wireless/ath/wil6210/txrx.c
+++ b/drivers/net/wireless/ath/wil6210/txrx.c
@@ -104,6 +104,51 @@ static inline int wil_vring_avail_high(struct vring *vring)
return wil_vring_avail_tx(vring) > wil_vring_wmark_high(vring);
}
+/* returns true when all tx vrings are empty */
+bool wil_is_tx_idle(struct wil6210_priv *wil)
+{
+ int i;
+ unsigned long data_comp_to;
+
+ for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
+ struct vring *vring = &wil->vring_tx[i];
+ int vring_index = vring - wil->vring_tx;
+ struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index];
+
+ spin_lock(&txdata->lock);
+
+ if (!vring->va || !txdata->enabled) {
+ spin_unlock(&txdata->lock);
+ continue;
+ }
+
+ data_comp_to = jiffies + msecs_to_jiffies(
+ WIL_DATA_COMPLETION_TO_MS);
+ if (test_bit(wil_status_napi_en, wil->status)) {
+ while (!wil_vring_is_empty(vring)) {
+ if (time_after(jiffies, data_comp_to)) {
+ wil_dbg_pm(wil,
+ "TO waiting for idle tx\n");
+ spin_unlock(&txdata->lock);
+ return false;
+ }
+ wil_dbg_ratelimited(wil,
+ "tx vring is not empty -> NAPI\n");
+ spin_unlock(&txdata->lock);
+ napi_synchronize(&wil->napi_tx);
+ msleep(20);
+ spin_lock(&txdata->lock);
+ if (!vring->va || !txdata->enabled)
+ break;
+ }
+ }
+
+ spin_unlock(&txdata->lock);
+ }
+
+ return true;
+}
+
/* wil_val_in_range - check if value in [min,max) */
static inline bool wil_val_in_range(int val, int min, int max)
{
@@ -406,6 +451,18 @@ static inline int wil_is_back_req(u8 fc)
(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_BACK_REQ);
}
+bool wil_is_rx_idle(struct wil6210_priv *wil)
+{
+ struct vring_rx_desc *_d;
+ struct vring *vring = &wil->vring_rx;
+
+ _d = (struct vring_rx_desc *)&vring->va[vring->swhead].rx;
+ if (_d->dma.status & RX_DMA_STATUS_DU)
+ return false;
+
+ return true;
+}
+
/**
* reap 1 frame from @swhead
*
@@ -1812,6 +1869,15 @@ static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring,
spin_lock(&txdata->lock);
+ if (test_bit(wil_status_suspending, wil->status) ||
+ test_bit(wil_status_suspended, wil->status) ||
+ test_bit(wil_status_resuming, wil->status)) {
+ wil_dbg_txrx(wil,
+ "suspend/resume in progress. drop packet\n");
+ spin_unlock(&txdata->lock);
+ return -EINVAL;
+ }
+
rc = (skb_is_gso(skb) ? __wil_tx_vring_tso : __wil_tx_vring)
(wil, vring, skb);
@@ -1864,6 +1930,11 @@ static inline void __wil_update_net_queues(struct wil6210_priv *wil,
return;
}
+ /* Do not wake the queues in suspend flow */
+ if (test_bit(wil_status_suspending, wil->status) ||
+ test_bit(wil_status_suspended, wil->status))
+ return;
+
/* check wake */
for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
struct vring *cur_vring = &wil->vring_tx[i];
diff --git a/drivers/net/wireless/ath/wil6210/wil6210.h b/drivers/net/wireless/ath/wil6210/wil6210.h
index ca532c777b56..35f0554b20cc 100644
--- a/drivers/net/wireless/ath/wil6210/wil6210.h
+++ b/drivers/net/wireless/ath/wil6210/wil6210.h
@@ -83,6 +83,15 @@ static inline u32 WIL_GET_BITS(u32 x, int b0, int b1)
*/
#define WIL_MAX_MPDU_OVERHEAD (62)
+struct wil_suspend_stats {
+ unsigned long successful_suspends;
+ unsigned long failed_suspends;
+ unsigned long successful_resumes;
+ unsigned long failed_resumes;
+ unsigned long rejected_by_device;
+ unsigned long rejected_by_host;
+};
+
/* Calculate MAC buffer size for the firmware. It includes all overhead,
* as it will go over the air, and need to be 8 byte aligned
*/
@@ -290,6 +299,8 @@ enum {
#define ISR_MISC_MBOX_EVT BIT_DMA_EP_MISC_ICR_FW_INT(1)
#define ISR_MISC_FW_ERROR BIT_DMA_EP_MISC_ICR_FW_INT(3)
+#define WIL_DATA_COMPLETION_TO_MS 200
+
/* Hardware definitions end */
struct fw_map {
u32 from; /* linker address - from, inclusive */
@@ -418,7 +429,9 @@ enum { /* for wil6210_priv.status */
wil_status_irqen, /* FIXME: interrupts enabled - for debug */
wil_status_napi_en, /* NAPI enabled protected by wil->mutex */
wil_status_resetting, /* reset in progress */
+ wil_status_suspending, /* suspend in progress */
wil_status_suspended, /* suspend completed, device is suspended */
+ wil_status_resuming, /* resume in progress */
wil_status_last /* keep last */
};
@@ -683,9 +696,12 @@ struct wil6210_priv {
struct wil_blob_wrapper blobs[ARRAY_SIZE(fw_mapping)];
u8 discovery_mode;
u8 abft_len;
+ u8 wakeup_trigger;
+ struct wil_suspend_stats suspend_stats;
void *platform_handle;
struct wil_platform_ops platform_ops;
+ bool keep_radio_on_during_sleep;
struct pmc_ctx pmc;
@@ -708,6 +724,11 @@ struct wil6210_priv {
struct notifier_block pm_notify;
#endif /* CONFIG_PM_SLEEP */
#endif /* CONFIG_PM */
+
+ bool suspend_resp_rcvd;
+ bool suspend_resp_comp;
+ u32 bus_request_kbps;
+ u32 bus_request_kbps_pre_suspend;
};
#define wil_to_wiphy(i) (i->wdev->wiphy)
@@ -964,6 +985,11 @@ bool wil_fw_verify_file_exists(struct wil6210_priv *wil, const char *name);
int wil_can_suspend(struct wil6210_priv *wil, bool is_runtime);
int wil_suspend(struct wil6210_priv *wil, bool is_runtime);
int wil_resume(struct wil6210_priv *wil, bool is_runtime);
+bool wil_is_wmi_idle(struct wil6210_priv *wil);
+int wmi_resume(struct wil6210_priv *wil);
+int wmi_suspend(struct wil6210_priv *wil);
+bool wil_is_tx_idle(struct wil6210_priv *wil);
+bool wil_is_rx_idle(struct wil6210_priv *wil);
int wil_fw_copy_crash_dump(struct wil6210_priv *wil, void *dest, u32 size);
void wil_fw_core_dump(struct wil6210_priv *wil);
diff --git a/drivers/net/wireless/ath/wil6210/wil_platform.h b/drivers/net/wireless/ath/wil6210/wil_platform.h
index f8c41172a3f4..5d9e4bfcb045 100644
--- a/drivers/net/wireless/ath/wil6210/wil_platform.h
+++ b/drivers/net/wireless/ath/wil6210/wil_platform.h
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2014-2016 Qualcomm Atheros, Inc.
+ * Copyright (c) 2014-2017 Qualcomm Atheros, Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
@@ -33,10 +33,11 @@ enum wil_platform_event {
*/
struct wil_platform_ops {
int (*bus_request)(void *handle, uint32_t kbps /* KBytes/Sec */);
- int (*suspend)(void *handle);
- int (*resume)(void *handle);
+ int (*suspend)(void *handle, bool keep_device_power);
+ int (*resume)(void *handle, bool device_powered_on);
void (*uninit)(void *handle);
int (*notify)(void *handle, enum wil_platform_event evt);
+ bool (*keep_radio_on_during_sleep)(void *handle);
};
/**
diff --git a/drivers/net/wireless/ath/wil6210/wmi.c b/drivers/net/wireless/ath/wil6210/wmi.c
index 93902cb2e8cf..26cf722e1495 100644
--- a/drivers/net/wireless/ath/wil6210/wmi.c
+++ b/drivers/net/wireless/ath/wil6210/wmi.c
@@ -37,6 +37,8 @@ module_param(led_id, byte, 0444);
MODULE_PARM_DESC(led_id,
" 60G device led enablement. Set the led ID (0-2) to enable");
+#define WIL_WAIT_FOR_SUSPEND_RESUME_COMP 200
+
/**
* WMI event receiving - theory of operations
*
@@ -233,6 +235,16 @@ static int __wmi_send(struct wil6210_priv *wil, u16 cmdid, void *buf, u16 len)
return -EAGAIN;
}
+ /* Allow sending only suspend / resume commands during susepnd flow */
+ if ((test_bit(wil_status_suspending, wil->status) ||
+ test_bit(wil_status_suspended, wil->status) ||
+ test_bit(wil_status_resuming, wil->status)) &&
+ ((cmdid != WMI_TRAFFIC_SUSPEND_CMDID) &&
+ (cmdid != WMI_TRAFFIC_RESUME_CMDID))) {
+ wil_err(wil, "WMI: reject send_command during suspend\n");
+ return -EINVAL;
+ }
+
if (!head) {
wil_err(wil, "WMI head is garbage: 0x%08x\n", r->head);
return -EINVAL;
@@ -862,6 +874,11 @@ void wmi_recv_cmd(struct wil6210_priv *wil)
return;
}
+ if (test_bit(wil_status_suspended, wil->status)) {
+ wil_err(wil, "suspended. cannot handle WMI event\n");
+ return;
+ }
+
for (n = 0;; n++) {
u16 len;
bool q;
@@ -914,6 +931,15 @@ void wmi_recv_cmd(struct wil6210_priv *wil)
struct wmi_cmd_hdr *wmi = &evt->event.wmi;
u16 id = le16_to_cpu(wmi->command_id);
u32 tstamp = le32_to_cpu(wmi->fw_timestamp);
+ if (test_bit(wil_status_resuming, wil->status)) {
+ if (id == WMI_TRAFFIC_RESUME_EVENTID)
+ clear_bit(wil_status_resuming,
+ wil->status);
+ else
+ wil_err(wil,
+ "WMI evt %d while resuming\n",
+ id);
+ }
spin_lock_irqsave(&wil->wmi_ev_lock, flags);
if (wil->reply_id && wil->reply_id == id) {
if (wil->reply_buf) {
@@ -921,6 +947,11 @@ void wmi_recv_cmd(struct wil6210_priv *wil)
min(len, wil->reply_size));
immed_reply = true;
}
+ if (id == WMI_TRAFFIC_SUSPEND_EVENTID) {
+ wil_dbg_wmi(wil,
+ "set suspend_resp_rcvd\n");
+ wil->suspend_resp_rcvd = true;
+ }
}
spin_unlock_irqrestore(&wil->wmi_ev_lock, flags);
@@ -1762,6 +1793,85 @@ void wmi_event_flush(struct wil6210_priv *wil)
spin_unlock_irqrestore(&wil->wmi_ev_lock, flags);
}
+int wmi_suspend(struct wil6210_priv *wil)
+{
+ int rc;
+ struct wmi_traffic_suspend_cmd cmd = {
+ .wakeup_trigger = wil->wakeup_trigger,
+ };
+ struct {
+ struct wmi_cmd_hdr wmi;
+ struct wmi_traffic_suspend_event evt;
+ } __packed reply;
+ u32 suspend_to = WIL_WAIT_FOR_SUSPEND_RESUME_COMP;
+
+ wil->suspend_resp_rcvd = false;
+ wil->suspend_resp_comp = false;
+
+ reply.evt.status = WMI_TRAFFIC_SUSPEND_REJECTED;
+
+ rc = wmi_call(wil, WMI_TRAFFIC_SUSPEND_CMDID, &cmd, sizeof(cmd),
+ WMI_TRAFFIC_SUSPEND_EVENTID, &reply, sizeof(reply),
+ suspend_to);
+ if (rc) {
+ wil_err(wil, "wmi_call for suspend req failed, rc=%d\n", rc);
+ if (rc == -ETIME)
+ /* wmi_call TO */
+ wil->suspend_stats.rejected_by_device++;
+ else
+ wil->suspend_stats.rejected_by_host++;
+ goto out;
+ }
+
+ wil_dbg_wmi(wil, "waiting for suspend_response_completed\n");
+
+ rc = wait_event_interruptible_timeout(wil->wq,
+ wil->suspend_resp_comp,
+ msecs_to_jiffies(suspend_to));
+ if (rc == 0) {
+ wil_err(wil, "TO waiting for suspend_response_completed\n");
+ if (wil->suspend_resp_rcvd)
+ /* Device responded but we TO due to another reason */
+ wil->suspend_stats.rejected_by_host++;
+ else
+ wil->suspend_stats.rejected_by_device++;
+ rc = -EBUSY;
+ goto out;
+ }
+
+ wil_dbg_wmi(wil, "suspend_response_completed rcvd\n");
+ if (reply.evt.status == WMI_TRAFFIC_SUSPEND_REJECTED) {
+ wil_dbg_pm(wil, "device rejected the suspend\n");
+ wil->suspend_stats.rejected_by_device++;
+ }
+ rc = reply.evt.status;
+
+out:
+ wil->suspend_resp_rcvd = false;
+ wil->suspend_resp_comp = false;
+
+ return rc;
+}
+
+int wmi_resume(struct wil6210_priv *wil)
+{
+ int rc;
+ struct {
+ struct wmi_cmd_hdr wmi;
+ struct wmi_traffic_resume_event evt;
+ } __packed reply;
+
+ reply.evt.status = WMI_TRAFFIC_RESUME_FAILED;
+
+ rc = wmi_call(wil, WMI_TRAFFIC_RESUME_CMDID, NULL, 0,
+ WMI_TRAFFIC_RESUME_EVENTID, &reply, sizeof(reply),
+ WIL_WAIT_FOR_SUSPEND_RESUME_COMP);
+ if (rc)
+ return rc;
+
+ return reply.evt.status;
+}
+
static bool wmi_evt_call_handler(struct wil6210_priv *wil, int id,
void *d, int len)
{
@@ -1851,3 +1961,36 @@ void wmi_event_worker(struct work_struct *work)
}
wil_dbg_wmi(wil, "event_worker: Finished\n");
}
+
+bool wil_is_wmi_idle(struct wil6210_priv *wil)
+{
+ ulong flags;
+ struct wil6210_mbox_ring *r = &wil->mbox_ctl.rx;
+ bool rc = false;
+
+ spin_lock_irqsave(&wil->wmi_ev_lock, flags);
+
+ /* Check if there are pending WMI events in the events queue */
+ if (!list_empty(&wil->pending_wmi_ev)) {
+ wil_dbg_pm(wil, "Pending WMI events in queue\n");
+ goto out;
+ }
+
+ /* Check if there is a pending WMI call */
+ if (wil->reply_id) {
+ wil_dbg_pm(wil, "Pending WMI call\n");
+ goto out;
+ }
+
+ /* Check if there are pending RX events in mbox */
+ r->head = wil_r(wil, RGF_MBOX +
+ offsetof(struct wil6210_mbox_ctl, rx.head));
+ if (r->tail != r->head)
+ wil_dbg_pm(wil, "Pending WMI mbox events\n");
+ else
+ rc = true;
+
+out:
+ spin_unlock_irqrestore(&wil->wmi_ev_lock, flags);
+ return rc;
+}
diff --git a/drivers/net/wireless/ath/wil6210/wmi.h b/drivers/net/wireless/ath/wil6210/wmi.h
index f7f5f4f801e3..256f63c57da0 100644
--- a/drivers/net/wireless/ath/wil6210/wmi.h
+++ b/drivers/net/wireless/ath/wil6210/wmi.h
@@ -59,6 +59,7 @@ enum wmi_fw_capability {
WMI_FW_CAPABILITY_DISABLE_AP_SME = 4,
WMI_FW_CAPABILITY_WMI_ONLY = 5,
WMI_FW_CAPABILITY_THERMAL_THROTTLING = 7,
+ WMI_FW_CAPABILITY_D3_SUSPEND = 8,
WMI_FW_CAPABILITY_MAX,
};
@@ -157,7 +158,7 @@ enum wmi_command_id {
WMI_FLASH_READ_CMDID = 0x902,
WMI_FLASH_WRITE_CMDID = 0x903,
/* Power management */
- WMI_TRAFFIC_DEFERRAL_CMDID = 0x904,
+ WMI_TRAFFIC_SUSPEND_CMDID = 0x904,
WMI_TRAFFIC_RESUME_CMDID = 0x905,
/* P2P */
WMI_P2P_CFG_CMDID = 0x910,
@@ -500,8 +501,14 @@ struct wmi_port_delete_cmd {
u8 reserved[3];
} __packed;
-/* WMI_TRAFFIC_DEFERRAL_CMDID */
-struct wmi_traffic_deferral_cmd {
+/* WMI_TRAFFIC_SUSPEND_CMD wakeup trigger bit mask values */
+enum wmi_wakeup_trigger {
+ WMI_WAKEUP_TRIGGER_UCAST = 0x01,
+ WMI_WAKEUP_TRIGGER_BCAST = 0x02,
+};
+
+/* WMI_TRAFFIC_SUSPEND_CMDID */
+struct wmi_traffic_suspend_cmd {
/* Bit vector: bit[0] - wake on Unicast, bit[1] - wake on Broadcast */
u8 wakeup_trigger;
} __packed;
@@ -1084,7 +1091,7 @@ enum wmi_event_id {
WMI_FLASH_READ_DONE_EVENTID = 0x1902,
WMI_FLASH_WRITE_DONE_EVENTID = 0x1903,
/* Power management */
- WMI_TRAFFIC_DEFERRAL_EVENTID = 0x1904,
+ WMI_TRAFFIC_SUSPEND_EVENTID = 0x1904,
WMI_TRAFFIC_RESUME_EVENTID = 0x1905,
/* P2P */
WMI_P2P_CFG_DONE_EVENTID = 0x1910,
@@ -1926,14 +1933,14 @@ struct wmi_link_maintain_cfg_read_done_event {
struct wmi_link_maintain_cfg lm_cfg;
} __packed;
-enum wmi_traffic_deferral_status {
- WMI_TRAFFIC_DEFERRAL_APPROVED = 0x0,
- WMI_TRAFFIC_DEFERRAL_REJECTED = 0x1,
+enum wmi_traffic_suspend_status {
+ WMI_TRAFFIC_SUSPEND_APPROVED = 0x0,
+ WMI_TRAFFIC_SUSPEND_REJECTED = 0x1,
};
-/* WMI_TRAFFIC_DEFERRAL_EVENTID */
-struct wmi_traffic_deferral_event {
- /* enum wmi_traffic_deferral_status_e */
+/* WMI_TRAFFIC_SUSPEND_EVENTID */
+struct wmi_traffic_suspend_event {
+ /* enum wmi_traffic_suspend_status_e */
u8 status;
} __packed;
--
2.19.2