b43: Add fw capabilities
Add automagic feature flags, so the firmware can tell the driver
about supported features and the driver can switch features on/off as
needed.
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: Stefan Lippers-Hollmann <s.l-h@gmx.de>
Tested-by: Stefan Lippers-Hollmann <s.l-h@gmx.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/b43/b43.h b/drivers/net/wireless/b43/b43.h
index 75aede0..f580c2812 100644
--- a/drivers/net/wireless/b43/b43.h
+++ b/drivers/net/wireless/b43/b43.h
@@ -163,6 +163,7 @@
#define B43_SHM_SH_WLCOREREV 0x0016 /* 802.11 core revision */
#define B43_SHM_SH_PCTLWDPOS 0x0008
#define B43_SHM_SH_RXPADOFF 0x0034 /* RX Padding data offset (PIO only) */
+#define B43_SHM_SH_FWCAPA 0x0042 /* Firmware capabilities (Opensource firmware only) */
#define B43_SHM_SH_PHYVER 0x0050 /* PHY version */
#define B43_SHM_SH_PHYTYPE 0x0052 /* PHY type */
#define B43_SHM_SH_ANTSWAP 0x005C /* Antenna swap threshold */
@@ -297,6 +298,10 @@
#define B43_HF_MLADVW 0x001000000000ULL /* N PHY ML ADV workaround (rev >= 13 only) */
#define B43_HF_PR45960W 0x080000000000ULL /* PR 45960 workaround (rev >= 13 only) */
+/* Firmware capabilities field in SHM (Opensource firmware only) */
+#define B43_FWCAPA_HWCRYPTO 0x0001
+#define B43_FWCAPA_QOS 0x0002
+
/* MacFilter offsets. */
#define B43_MACFILTER_SELF 0x0000
#define B43_MACFILTER_BSSID 0x0003
@@ -596,6 +601,13 @@
/* Pointer to the ieee80211 hardware data structure */
struct ieee80211_hw *hw;
+ /* The number of queues that were registered with the mac80211 subsystem
+ * initially. This is a backup copy of hw->queues in case hw->queues has
+ * to be dynamically lowered at runtime (Firmware does not support QoS).
+ * hw->queues has to be restored to the original value before unregistering
+ * from the mac80211 subsystem. */
+ u16 mac80211_initially_registered_queues;
+
struct mutex mutex;
spinlock_t irq_lock;
/* R/W lock for data transmission.
@@ -749,6 +761,8 @@
bool dfq_valid; /* Directed frame queue valid (IBSS PS mode, ATIM) */
bool radio_hw_enable; /* saved state of radio hardware enabled state */
bool suspend_in_progress; /* TRUE, if we are in a suspend/resume cycle */
+ bool qos_enabled; /* TRUE, if QoS is used. */
+ bool hwcrypto_enabled; /* TRUE, if HW crypto acceleration is enabled. */
/* PHY/Radio device. */
struct b43_phy phy;
diff --git a/drivers/net/wireless/b43/dma.c b/drivers/net/wireless/b43/dma.c
index eae680b..7964cc3 100644
--- a/drivers/net/wireless/b43/dma.c
+++ b/drivers/net/wireless/b43/dma.c
@@ -1285,7 +1285,7 @@
{
struct b43_dmaring *ring;
- if (b43_modparam_qos) {
+ if (dev->qos_enabled) {
/* 0 = highest priority */
switch (queue_prio) {
default:
diff --git a/drivers/net/wireless/b43/main.c b/drivers/net/wireless/b43/main.c
index 5d9f198..6456afe 100644
--- a/drivers/net/wireless/b43/main.c
+++ b/drivers/net/wireless/b43/main.c
@@ -80,8 +80,8 @@
module_param_named(nohwcrypt, modparam_nohwcrypt, int, 0444);
MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption.");
-int b43_modparam_qos = 1;
-module_param_named(qos, b43_modparam_qos, int, 0444);
+static int modparam_qos = 1;
+module_param_named(qos, modparam_qos, int, 0444);
MODULE_PARM_DESC(qos, "Enable QOS support (default on)");
static int modparam_btcoex = 1;
@@ -538,6 +538,13 @@
b43_shm_write16(dev, B43_SHM_SHARED, B43_SHM_SH_HOSTFHI, hi);
}
+/* Read the firmware capabilities bitmask (Opensource firmware only) */
+static u16 b43_fwcapa_read(struct b43_wldev *dev)
+{
+ B43_WARN_ON(!dev->fw.opensource);
+ return b43_shm_read16(dev, B43_SHM_SHARED, B43_SHM_SH_FWCAPA);
+}
+
void b43_tsf_read(struct b43_wldev *dev, u64 *tsf)
{
u32 low, high;
@@ -2307,12 +2314,34 @@
dev->fw.patch = fwpatch;
dev->fw.opensource = (fwdate == 0xFFFF);
+ /* Default to use-all-queues. */
+ dev->wl->hw->queues = dev->wl->mac80211_initially_registered_queues;
+ dev->qos_enabled = !!modparam_qos;
+ /* Default to firmware/hardware crypto acceleration. */
+ dev->hwcrypto_enabled = 1;
+
if (dev->fw.opensource) {
+ u16 fwcapa;
+
/* Patchlevel info is encoded in the "time" field. */
dev->fw.patch = fwtime;
- b43info(dev->wl, "Loading OpenSource firmware version %u.%u%s\n",
- dev->fw.rev, dev->fw.patch,
- dev->fw.pcm_request_failed ? " (Hardware crypto not supported)" : "");
+ b43info(dev->wl, "Loading OpenSource firmware version %u.%u\n",
+ dev->fw.rev, dev->fw.patch);
+
+ fwcapa = b43_fwcapa_read(dev);
+ if (!(fwcapa & B43_FWCAPA_HWCRYPTO) || dev->fw.pcm_request_failed) {
+ b43info(dev->wl, "Hardware crypto acceleration not supported by firmware\n");
+ /* Disable hardware crypto and fall back to software crypto. */
+ dev->hwcrypto_enabled = 0;
+ }
+ if (!(fwcapa & B43_FWCAPA_QOS)) {
+ b43info(dev->wl, "QoS not supported by firmware\n");
+ /* Disable QoS. Tweak hw->queues to 1. It will be restored before
+ * ieee80211_unregister to make sure the networking core can
+ * properly free possible resources. */
+ dev->wl->hw->queues = 1;
+ dev->qos_enabled = 0;
+ }
} else {
b43info(dev->wl, "Loading firmware version %u.%u "
"(20%.2i-%.2i-%.2i %.2i:%.2i:%.2i)\n",
@@ -3627,7 +3656,7 @@
if (!dev || b43_status(dev) < B43_STAT_INITIALIZED)
goto out_unlock;
- if (dev->fw.pcm_request_failed) {
+ if (dev->fw.pcm_request_failed || !dev->hwcrypto_enabled) {
/* We don't have firmware for the crypto engine.
* Must use software-crypto. */
err = -EOPNOTSUPP;
@@ -4727,6 +4756,7 @@
b43err(NULL, "Could not allocate ieee80211 device\n");
goto out;
}
+ wl = hw_to_b43_wl(hw);
/* fill hw info */
hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
@@ -4740,7 +4770,8 @@
BIT(NL80211_IFTYPE_WDS) |
BIT(NL80211_IFTYPE_ADHOC);
- hw->queues = b43_modparam_qos ? 4 : 1;
+ hw->queues = modparam_qos ? 4 : 1;
+ wl->mac80211_initially_registered_queues = hw->queues;
hw->max_rates = 2;
SET_IEEE80211_DEV(hw, dev->dev);
if (is_valid_ether_addr(sprom->et1mac))
@@ -4748,9 +4779,7 @@
else
SET_IEEE80211_PERM_ADDR(hw, sprom->il0mac);
- /* Get and initialize struct b43_wl */
- wl = hw_to_b43_wl(hw);
- memset(wl, 0, sizeof(*wl));
+ /* Initialize struct b43_wl */
wl->hw = hw;
spin_lock_init(&wl->irq_lock);
rwlock_init(&wl->tx_lock);
@@ -4816,8 +4845,13 @@
cancel_work_sync(&wldev->restart_work);
B43_WARN_ON(!wl);
- if (wl->current_dev == wldev)
+ if (wl->current_dev == wldev) {
+ /* Restore the queues count before unregistering, because firmware detect
+ * might have modified it. Restoring is important, so the networking
+ * stack can properly free resources. */
+ wl->hw->queues = wl->mac80211_initially_registered_queues;
ieee80211_unregister_hw(wl->hw);
+ }
b43_one_core_detach(dev);
diff --git a/drivers/net/wireless/b43/main.h b/drivers/net/wireless/b43/main.h
index 40abcf5..950fb1b 100644
--- a/drivers/net/wireless/b43/main.h
+++ b/drivers/net/wireless/b43/main.h
@@ -39,7 +39,6 @@
#define PAD_BYTES(nr_bytes) P4D_BYTES( __LINE__ , (nr_bytes))
-extern int b43_modparam_qos;
extern int b43_modparam_verbose;
/* Logmessage verbosity levels. Update the b43_modparam_verbose helptext, if
diff --git a/drivers/net/wireless/b43/pio.c b/drivers/net/wireless/b43/pio.c
index 8cd9776..69138e8 100644
--- a/drivers/net/wireless/b43/pio.c
+++ b/drivers/net/wireless/b43/pio.c
@@ -313,7 +313,7 @@
{
struct b43_pio_txqueue *q;
- if (b43_modparam_qos) {
+ if (dev->qos_enabled) {
/* 0 = highest priority */
switch (queue_prio) {
default: