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qtnfmac: assign each wiphy to its own virtual platform device

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Quantenna Pearl device exposes multiple (up to 3) radio interfaces under
single PCIe function. So far all the wiphy devices were attached to the
same pcie device. As a result, all different wireless network devices
were reported under the same sysfs directory for pcie device, e.g.:

$ ls  /sys/class/net/wlan0/device/net/
  wlan0 wlan1

It turns out that such behavior may confuse various users of wireless
subsystem. For instance, it turned out to be the case for:
- Linux init systems, e.g. for renaming based on parent device
- OpenWRT configuration scripts

Suggested solution is to add an intermediate virtual platform device
for each radio interface.

Signed-off-by: Sergey Matyukevich <sergey.matyukevich.os@quantenna.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Sergey Matyukevich 2020-02-13 11:45:31 +00:00 committed by Kalle Valo
parent c3d476d218
commit 616f5701f4
3 changed files with 24 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/net/wireless/quantenna/qtnfmac/cfg80211.c
View File

@ -1061,7 +1061,8 @@ static void qtnf_cfg80211_reg_notifier(struct wiphy *wiphy,
}
}
struct wiphy *qtnf_wiphy_allocate(struct qtnf_bus *bus)
struct wiphy *qtnf_wiphy_allocate(struct qtnf_bus *bus,
struct platform_device *pdev)
{
struct wiphy *wiphy;
@ -1076,7 +1077,10 @@ struct wiphy *qtnf_wiphy_allocate(struct qtnf_bus *bus)
if (!wiphy)
return NULL;
set_wiphy_dev(wiphy, bus->dev);
if (pdev)
set_wiphy_dev(wiphy, &pdev->dev);
else
set_wiphy_dev(wiphy, bus->dev);
return wiphy;
}

18
drivers/net/wireless/quantenna/qtnfmac/core.c
View File

@ -431,18 +431,28 @@ static void qtnf_vif_send_data_high_pri(struct work_struct *work)
static struct qtnf_wmac *qtnf_core_mac_alloc(struct qtnf_bus *bus,
unsigned int macid)
{
struct platform_device *pdev = NULL;
struct qtnf_wmac *mac;
struct qtnf_vif *vif;
struct wiphy *wiphy;
struct qtnf_wmac *mac;
unsigned int i;
wiphy = qtnf_wiphy_allocate(bus);
if (bus->hw_info.num_mac > 1) {
pdev = platform_device_register_data(bus->dev,
dev_name(bus->dev),
macid, NULL, 0);
if (IS_ERR(pdev))
return ERR_PTR(-EINVAL);
}
wiphy = qtnf_wiphy_allocate(bus, pdev);
if (!wiphy)
return ERR_PTR(-ENOMEM);
mac = wiphy_priv(wiphy);
mac->macid = macid;
mac->pdev = pdev;
mac->bus = bus;
mutex_init(&mac->mac_lock);
INIT_DELAYED_WORK(&mac->scan_timeout, qtnf_mac_scan_timeout);
@ -493,7 +503,6 @@ int qtnf_core_net_attach(struct qtnf_wmac *mac, struct qtnf_vif *vif,
dev_net_set(dev, wiphy_net(wiphy));
dev->ieee80211_ptr = &vif->wdev;
ether_addr_copy(dev->dev_addr, vif->mac_addr);
SET_NETDEV_DEV(dev, wiphy_dev(wiphy));
dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
dev->watchdog_timeo = QTNF_DEF_WDOG_TIMEOUT;
dev->tx_queue_len = 100;
@ -505,7 +514,7 @@ int qtnf_core_net_attach(struct qtnf_wmac *mac, struct qtnf_vif *vif,
qdev_vif = netdev_priv(dev);
*((void **)qdev_vif) = vif;
SET_NETDEV_DEV(dev, mac->bus->dev);
SET_NETDEV_DEV(dev, wiphy_dev(wiphy));
ret = register_netdevice(dev);
if (ret) {
@ -561,6 +570,7 @@ static void qtnf_core_mac_detach(struct qtnf_bus *bus, unsigned int macid)
wiphy->bands[band] = NULL;
}
platform_device_unregister(mac->pdev);
qtnf_mac_iface_comb_free(mac);
qtnf_mac_ext_caps_free(mac);
kfree(mac->macinfo.wowlan);

5
drivers/net/wireless/quantenna/qtnfmac/core.h
View File

@ -20,6 +20,7 @@
#include <linux/ctype.h>
#include <linux/workqueue.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include "qlink.h"
#include "trans.h"
@ -107,6 +108,7 @@ struct qtnf_wmac {
struct mutex mac_lock; /* lock during wmac speicific ops */
struct delayed_work scan_timeout;
struct ieee80211_regdomain *rd;
struct platform_device *pdev;
};
struct qtnf_hw_info {
@ -127,7 +129,8 @@ void qtnf_mac_iface_comb_free(struct qtnf_wmac *mac);
void qtnf_mac_ext_caps_free(struct qtnf_wmac *mac);
bool qtnf_slave_radar_get(void);
bool qtnf_dfs_offload_get(void);
struct wiphy *qtnf_wiphy_allocate(struct qtnf_bus *bus);
struct wiphy *qtnf_wiphy_allocate(struct qtnf_bus *bus,
struct platform_device *pdev);
int qtnf_core_net_attach(struct qtnf_wmac *mac, struct qtnf_vif *priv,
const char *name, unsigned char name_assign_type);
void qtnf_main_work_queue(struct work_struct *work);