From 223beea23810577353c4cc71ce2f44dbba0d4e16 Mon Sep 17 00:00:00 2001 From: Inaky Perez-Gonzalez Date: Mon, 13 Apr 2009 10:26:34 -0700 Subject: wimax/i2400m: allow kernel commands to device to be logged too By running 'echo 1 > /sys/kernel/debug/wimax:wmxX/i2400m/trace_msg_from_user', the driver will echo to user space all the commands being sent to the device from user space, along with the responses. However, this only helps with the commands being sent from user space; with this patch, the trace hook is moved to i2400m_msg_to_dev(), which is the single access point for running commands to the device (both by user space and the kernel driver). This allows better debugging by having a complete stream of commands/acks and reports. Signed-off-by: Inaky Perez-Gonzalez --- drivers/net/wimax/i2400m/control.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/net/wimax/i2400m/control.c') diff --git a/drivers/net/wimax/i2400m/control.c b/drivers/net/wimax/i2400m/control.c index b3cadb626fe..0f58418748a 100644 --- a/drivers/net/wimax/i2400m/control.c +++ b/drivers/net/wimax/i2400m/control.c @@ -721,6 +721,8 @@ struct sk_buff *i2400m_msg_to_dev(struct i2400m *i2400m, ack_timeout = HZ; }; + if (unlikely(i2400m->trace_msg_from_user)) + wimax_msg(&i2400m->wimax_dev, "echo", buf, buf_len, GFP_KERNEL); /* The RX path in rx.c will put any response for this message * in i2400m->ack_skb and wake us up. If we cancel the wait, * we need to change the value of i2400m->ack_skb to something @@ -755,6 +757,9 @@ struct sk_buff *i2400m_msg_to_dev(struct i2400m *i2400m, ack_l3l4_hdr = wimax_msg_data_len(ack_skb, &ack_len); /* Check the ack and deliver it if it is ok */ + if (unlikely(i2400m->trace_msg_from_user)) + wimax_msg(&i2400m->wimax_dev, "echo", + ack_l3l4_hdr, ack_len, GFP_KERNEL); result = i2400m_msg_size_check(i2400m, ack_l3l4_hdr, ack_len); if (result < 0) { dev_err(dev, "HW BUG? reply to message 0x%04x: %d\n", -- cgit v1.2.3-70-g09d2 From 8ac1101f8cd58a62517ba86745bc000d3a21f09b Mon Sep 17 00:00:00 2001 From: Inaky Perez-Gonzalez Date: Sat, 25 Apr 2009 00:26:14 -0700 Subject: wimax/i2400m: factor out 'state report's TLV handling to a function i2400m_report_state_hook() is going to get messier as we add handling code. Signed-off-by: Inaky Perez-Gonzalez --- drivers/net/wimax/i2400m/control.c | 89 +++++++++++++++++++++----------------- 1 file changed, 50 insertions(+), 39 deletions(-) (limited to 'drivers/net/wimax/i2400m/control.c') diff --git a/drivers/net/wimax/i2400m/control.c b/drivers/net/wimax/i2400m/control.c index 0f58418748a..b42e3472798 100644 --- a/drivers/net/wimax/i2400m/control.c +++ b/drivers/net/wimax/i2400m/control.c @@ -400,7 +400,53 @@ out: /* - * Parse a 'state report' and extract carrier on/off information + * Process a TLV from a 'state report' + * + * @i2400m: device descriptor + * @tlv: pointer to the TLV header; it has been already validated for + * consistent size. + * @tag: for error messages + * + * Act on the TLVs from a 'state report'. + */ +static +void i2400m_report_state_parse_tlv(struct i2400m *i2400m, + const struct i2400m_tlv_hdr *tlv, + const char *tag) +{ + struct device *dev = i2400m_dev(i2400m); + const struct i2400m_tlv_media_status *ms; + const struct i2400m_tlv_system_state *ss; + const struct i2400m_tlv_rf_switches_status *rfss; + + if (0 == i2400m_tlv_match(tlv, I2400M_TLV_SYSTEM_STATE, sizeof(*ss))) { + ss = container_of(tlv, typeof(*ss), hdr); + d_printf(2, dev, "%s: system state TLV " + "found (0x%04x), state 0x%08x\n", + tag, I2400M_TLV_SYSTEM_STATE, + le32_to_cpu(ss->state)); + i2400m_report_tlv_system_state(i2400m, ss); + } + if (0 == i2400m_tlv_match(tlv, I2400M_TLV_RF_STATUS, sizeof(*rfss))) { + rfss = container_of(tlv, typeof(*rfss), hdr); + d_printf(2, dev, "%s: RF status TLV " + "found (0x%04x), sw 0x%02x hw 0x%02x\n", + tag, I2400M_TLV_RF_STATUS, + le32_to_cpu(rfss->sw_rf_switch), + le32_to_cpu(rfss->hw_rf_switch)); + i2400m_report_tlv_rf_switches_status(i2400m, rfss); + } + if (0 == i2400m_tlv_match(tlv, I2400M_TLV_MEDIA_STATUS, sizeof(*ms))) { + ms = container_of(tlv, typeof(*ms), hdr); + d_printf(2, dev, "%s: Media Status TLV: %u\n", + tag, le32_to_cpu(ms->media_status)); + i2400m_report_tlv_media_status(i2400m, ms); + } +} + + +/* + * Parse a 'state report' and extract information * * @i2400m: device descriptor * @l3l4_hdr: pointer to message; it has been already validated for @@ -409,13 +455,7 @@ out: * declaration is assumed to be congruent with @size (as in * sizeof(*l3l4_hdr) + l3l4_hdr->length == size) * - * Extract from the report state the system state TLV and infer from - * there if we have a carrier or not. Update our local state and tell - * netdev. - * - * When setting the carrier, it's fine to set OFF twice (for example), - * as netif_carrier_off() will not generate two OFF events (just on - * the transitions). + * Walk over the TLVs in a report state and act on them. */ static void i2400m_report_state_hook(struct i2400m *i2400m, @@ -424,9 +464,6 @@ void i2400m_report_state_hook(struct i2400m *i2400m, { struct device *dev = i2400m_dev(i2400m); const struct i2400m_tlv_hdr *tlv; - const struct i2400m_tlv_system_state *ss; - const struct i2400m_tlv_rf_switches_status *rfss; - const struct i2400m_tlv_media_status *ms; size_t tlv_size = le16_to_cpu(l3l4_hdr->length); d_fnstart(4, dev, "(i2400m %p, l3l4_hdr %p, size %zu, %s)\n", @@ -434,34 +471,8 @@ void i2400m_report_state_hook(struct i2400m *i2400m, tlv = NULL; while ((tlv = i2400m_tlv_buffer_walk(i2400m, &l3l4_hdr->pl, - tlv_size, tlv))) { - if (0 == i2400m_tlv_match(tlv, I2400M_TLV_SYSTEM_STATE, - sizeof(*ss))) { - ss = container_of(tlv, typeof(*ss), hdr); - d_printf(2, dev, "%s: system state TLV " - "found (0x%04x), state 0x%08x\n", - tag, I2400M_TLV_SYSTEM_STATE, - le32_to_cpu(ss->state)); - i2400m_report_tlv_system_state(i2400m, ss); - } - if (0 == i2400m_tlv_match(tlv, I2400M_TLV_RF_STATUS, - sizeof(*rfss))) { - rfss = container_of(tlv, typeof(*rfss), hdr); - d_printf(2, dev, "%s: RF status TLV " - "found (0x%04x), sw 0x%02x hw 0x%02x\n", - tag, I2400M_TLV_RF_STATUS, - le32_to_cpu(rfss->sw_rf_switch), - le32_to_cpu(rfss->hw_rf_switch)); - i2400m_report_tlv_rf_switches_status(i2400m, rfss); - } - if (0 == i2400m_tlv_match(tlv, I2400M_TLV_MEDIA_STATUS, - sizeof(*ms))) { - ms = container_of(tlv, typeof(*ms), hdr); - d_printf(2, dev, "%s: Media Status TLV: %u\n", - tag, le32_to_cpu(ms->media_status)); - i2400m_report_tlv_media_status(i2400m, ms); - } - } + tlv_size, tlv))) + i2400m_report_state_parse_tlv(i2400m, tlv, tag); d_fnend(4, dev, "(i2400m %p, l3l4_hdr %p, size %zu, %s) = void\n", i2400m, l3l4_hdr, size, tag); } -- cgit v1.2.3-70-g09d2 From 052991d7ac7f7b2c0319e6ccd2e8a48a71f2bd58 Mon Sep 17 00:00:00 2001 From: Inaky Perez-Gonzalez Date: Sat, 2 May 2009 02:50:03 -0700 Subject: wimax/i2400m: remove redundant readiness checks from i2400m_report_tlv_*() Functions i2400m_report_tlv*() are only called from i2400m_report_hook(), called in a workqueue by i2400m_report_hook_work(). The scheduler checks for device readiness before scheduling. Added an extra check for readiness in i2400m_report_hook_work(), which makes all the checks down the line redundant. Obviously the device state could change in the middle, but error handling would take care of that. Signed-off-by: Inaky Perez-Gonzalez --- drivers/net/wimax/i2400m/control.c | 6 ------ drivers/net/wimax/i2400m/rx.c | 3 ++- 2 files changed, 2 insertions(+), 7 deletions(-) (limited to 'drivers/net/wimax/i2400m/control.c') diff --git a/drivers/net/wimax/i2400m/control.c b/drivers/net/wimax/i2400m/control.c index b42e3472798..bd193ae2178 100644 --- a/drivers/net/wimax/i2400m/control.c +++ b/drivers/net/wimax/i2400m/control.c @@ -292,8 +292,6 @@ void i2400m_report_tlv_system_state(struct i2400m *i2400m, d_fnstart(3, dev, "(i2400m %p ss %p [%u])\n", i2400m, ss, i2400m_state); - if (unlikely(i2400m->ready == 0)) /* act if up */ - goto out; if (i2400m->state != i2400m_state) { i2400m->state = i2400m_state; wake_up_all(&i2400m->state_wq); @@ -341,7 +339,6 @@ void i2400m_report_tlv_system_state(struct i2400m *i2400m, i2400m->bus_reset(i2400m, I2400M_RT_WARM); break; }; -out: d_fnend(3, dev, "(i2400m %p ss %p [%u]) = void\n", i2400m, ss, i2400m_state); } @@ -372,8 +369,6 @@ void i2400m_report_tlv_media_status(struct i2400m *i2400m, d_fnstart(3, dev, "(i2400m %p ms %p [%u])\n", i2400m, ms, status); - if (unlikely(i2400m->ready == 0)) /* act if up */ - goto out; switch (status) { case I2400M_MEDIA_STATUS_LINK_UP: netif_carrier_on(net_dev); @@ -393,7 +388,6 @@ void i2400m_report_tlv_media_status(struct i2400m *i2400m, dev_err(dev, "HW BUG? unknown media status %u\n", status); }; -out: d_fnend(3, dev, "(i2400m %p ms %p [%u]) = void\n", i2400m, ms, status); } diff --git a/drivers/net/wimax/i2400m/rx.c b/drivers/net/wimax/i2400m/rx.c index a4adc78102f..7643850a6fb 100644 --- a/drivers/net/wimax/i2400m/rx.c +++ b/drivers/net/wimax/i2400m/rx.c @@ -177,7 +177,8 @@ void i2400m_report_hook_work(struct work_struct *ws) struct i2400m_work *iw = container_of(ws, struct i2400m_work, ws); struct i2400m_report_hook_args *args = (void *) iw->pl; - i2400m_report_hook(iw->i2400m, args->l3l4_hdr, args->size); + if (iw->i2400m->ready) + i2400m_report_hook(iw->i2400m, args->l3l4_hdr, args->size); kfree_skb(args->skb_rx); i2400m_put(iw->i2400m); kfree(iw); -- cgit v1.2.3-70-g09d2 From fb10167478a3a8e29fe122a7bf4c67b5cfc48a1b Mon Sep 17 00:00:00 2001 From: Inaky Perez-Gonzalez Date: Thu, 7 May 2009 10:27:42 -0700 Subject: wimax/i2400m: introduce module parameter to disable entering power save The i2400m driver waits for the device to report being ready for entering power save before asking it to do so. This module parameter allows control of said operation; if disabled, the driver won't ask the device to enter power save mode. This is useful in setups where power saving is not so important or when the overhead imposed by network reentry after power save is not acceptable; by combining this with parameter 'idle_mode_disabled', the driver will always maintain both the connection and the device in active state. Signed-off-by: Inaky Perez-Gonzalez --- drivers/net/wimax/i2400m/control.c | 11 +++++++++-- drivers/net/wimax/i2400m/driver.c | 8 ++++++++ drivers/net/wimax/i2400m/i2400m.h | 1 + 3 files changed, 18 insertions(+), 2 deletions(-) (limited to 'drivers/net/wimax/i2400m/control.c') diff --git a/drivers/net/wimax/i2400m/control.c b/drivers/net/wimax/i2400m/control.c index bd193ae2178..89cdfe4e8d8 100644 --- a/drivers/net/wimax/i2400m/control.c +++ b/drivers/net/wimax/i2400m/control.c @@ -505,8 +505,15 @@ void i2400m_report_hook(struct i2400m *i2400m, * it. */ case I2400M_MT_REPORT_POWERSAVE_READY: /* zzzzz */ if (l3l4_hdr->status == cpu_to_le16(I2400M_MS_DONE_OK)) { - d_printf(1, dev, "ready for powersave, requesting\n"); - i2400m_cmd_enter_powersave(i2400m); + if (i2400m_power_save_disabled) + d_printf(1, dev, "ready for powersave, " + "not requesting (disabled by module " + "parameter)\n"); + else { + d_printf(1, dev, "ready for powersave, " + "requesting\n"); + i2400m_cmd_enter_powersave(i2400m); + } } break; }; diff --git a/drivers/net/wimax/i2400m/driver.c b/drivers/net/wimax/i2400m/driver.c index ef16c573bb2..86dd18a4835 100644 --- a/drivers/net/wimax/i2400m/driver.c +++ b/drivers/net/wimax/i2400m/driver.c @@ -82,6 +82,14 @@ module_param_named(rx_reorder_disabled, i2400m_rx_reorder_disabled, int, 0644); MODULE_PARM_DESC(rx_reorder_disabled, "If true, RX reordering will be disabled."); +int i2400m_power_save_disabled; /* 0 (power saving enabled) by default */ +module_param_named(power_save_disabled, i2400m_power_save_disabled, int, 0644); +MODULE_PARM_DESC(power_save_disabled, + "If true, the driver will not tell the device to enter " + "power saving mode when it reports it is ready for it. " + "False by default (so the device is told to do power " + "saving)."); + /** * i2400m_queue_work - schedule work on a i2400m's queue * diff --git a/drivers/net/wimax/i2400m/i2400m.h b/drivers/net/wimax/i2400m/i2400m.h index 434ba310c2f..8dba246e15b 100644 --- a/drivers/net/wimax/i2400m/i2400m.h +++ b/drivers/net/wimax/i2400m/i2400m.h @@ -709,6 +709,7 @@ static const __le32 i2400m_SBOOT_BARKER[4] = { cpu_to_le32(I2400M_SBOOT_BARKER) }; +extern int i2400m_power_save_disabled; /* * Utility functions -- cgit v1.2.3-70-g09d2 From b4bd07e3b13e3c848c7678c4fc870cca1d22ed4e Mon Sep 17 00:00:00 2001 From: Inaky Perez-Gonzalez Date: Thu, 21 May 2009 19:46:45 -0700 Subject: wimax/i2400m: don't reset device on i2400m_dev_shutdown() i2400m_dev_shutdown() tried to reset the device to put it in a known state before shutting down. But that turned out to be pointless. We reach this case in two paths: 1 - when the device resets, to clean up state 2 - when the driver is unloaded, for the same however, in both cases it is pointless; in (1) the device is already reset, why do it again? in (2) we can't -- the USB stack, for example, doesn't allow communicating with the device when the driver is being unbound and if the device is disconnected, the device is gone already. So just remove it. Leave the function as a placeholder for future cleanups that will be done from data allocated by the driver during device operation. Signed-off-by: Inaky Perez-Gonzalez --- drivers/net/wimax/i2400m/control.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'drivers/net/wimax/i2400m/control.c') diff --git a/drivers/net/wimax/i2400m/control.c b/drivers/net/wimax/i2400m/control.c index 89cdfe4e8d8..d8e0cdfa35d 100644 --- a/drivers/net/wimax/i2400m/control.c +++ b/drivers/net/wimax/i2400m/control.c @@ -1396,16 +1396,16 @@ error: * * @i2400m: device descriptor * - * Gracefully stops the device, moving it to the lowest power - * consumption state possible. + * Release resources acquired during the running of the device; in + * theory, should also tell the device to go to sleep, switch off the + * radio, all that, but at this point, in most cases (driver + * disconnection, reset handling) we can't even talk to the device. */ void i2400m_dev_shutdown(struct i2400m *i2400m) { - int result = -ENODEV; struct device *dev = i2400m_dev(i2400m); d_fnstart(3, dev, "(i2400m %p)\n", i2400m); - result = i2400m->bus_reset(i2400m, I2400M_RT_WARM); - d_fnend(3, dev, "(i2400m %p) = void [%d]\n", i2400m, result); + d_fnend(3, dev, "(i2400m %p) = void\n", i2400m); return; } -- cgit v1.2.3-70-g09d2 From b4013f91cdda10f3f15530914f3c7f39738b0b50 Mon Sep 17 00:00:00 2001 From: Inaky Perez-Gonzalez Date: Wed, 3 Jun 2009 09:45:55 +0800 Subject: wimax/i2400m: if a device reboot happens during probe, handle it When a device reboot happens when we are under probe, with init_mutex taken, make sure we can recover. Have dev_reset_handle set boot mode and i2400m_msg_to_dev() will see it and fail gracefully instead of timing out. Found and diagnosed by Cindy H. Kao. Signed-off-by: Inaky Perez-Gonzalez --- drivers/net/wimax/i2400m/control.c | 1 + drivers/net/wimax/i2400m/driver.c | 2 ++ drivers/net/wimax/i2400m/fw.c | 2 ++ 3 files changed, 5 insertions(+) (limited to 'drivers/net/wimax/i2400m/control.c') diff --git a/drivers/net/wimax/i2400m/control.c b/drivers/net/wimax/i2400m/control.c index d8e0cdfa35d..f9399f2597f 100644 --- a/drivers/net/wimax/i2400m/control.c +++ b/drivers/net/wimax/i2400m/control.c @@ -695,6 +695,7 @@ struct sk_buff *i2400m_msg_to_dev(struct i2400m *i2400m, d_fnstart(3, dev, "(i2400m %p buf %p len %zu)\n", i2400m, buf, buf_len); + rmb(); /* Make sure we see what i2400m_dev_reset_handle() */ if (i2400m->boot_mode) return ERR_PTR(-ENODEV); diff --git a/drivers/net/wimax/i2400m/driver.c b/drivers/net/wimax/i2400m/driver.c index 897794c9209..e8d022d5842 100644 --- a/drivers/net/wimax/i2400m/driver.c +++ b/drivers/net/wimax/i2400m/driver.c @@ -610,6 +610,8 @@ out: */ int i2400m_dev_reset_handle(struct i2400m *i2400m) { + i2400m->boot_mode = 1; + wmb(); /* Make sure i2400m_msg_to_dev() sees boot_mode */ return i2400m_schedule_work(i2400m, __i2400m_dev_reset_handle, GFP_ATOMIC); } diff --git a/drivers/net/wimax/i2400m/fw.c b/drivers/net/wimax/i2400m/fw.c index 26924f17f19..01c926ed309 100644 --- a/drivers/net/wimax/i2400m/fw.c +++ b/drivers/net/wimax/i2400m/fw.c @@ -985,6 +985,7 @@ int i2400m_fw_dnload(struct i2400m *i2400m, const struct i2400m_bcf_hdr *bcf, d_fnstart(5, dev, "(i2400m %p bcf %p size %zu)\n", i2400m, bcf, bcf_size); i2400m->boot_mode = 1; + wmb(); /* Make sure other readers see it */ hw_reboot: if (count-- == 0) { ret = -ERESTARTSYS; @@ -1033,6 +1034,7 @@ hw_reboot: d_printf(2, dev, "fw %s successfully uploaded\n", i2400m->fw_name); i2400m->boot_mode = 0; + wmb(); /* Make sure i2400m_msg_to_dev() sees boot_mode */ error_dnload_finalize: error_dnload_bcf: error_dnload_init: -- cgit v1.2.3-70-g09d2 From 0bcfc5ef016e8217709c65c5a7335e40ceabc99c Mon Sep 17 00:00:00 2001 From: Cindy H Kao Date: Wed, 10 Jun 2009 17:06:19 -0700 Subject: wimax/i2400m: use -EL3RST to indicate device reset instead of -ERESTARTSYS When the i2400m device resets, the driver code will force some functions to return a -ERESTARTSYS error code, which can is used by the caller to determine which recovery actions to take. However, in certain situations the only thing that can be done is to bubble up said error code to user space, for handling. However, -ERESTARSYS was a poor choice, as it is supposed to be used by the kernel only. As such, replace -ERESTARTSYS with -EL3RST; as well, in i2400m_msg_to_dev(), when the device is in boot mode (following a recent reset), return -EL3RST instead of -ENODEV (meaning the device is in bootrom mode after a reset, not that the device was disconnected, and thus, normal commands cannot be executed). Signed-off-by: Cindy H Kao --- drivers/net/wimax/i2400m/control.c | 2 +- drivers/net/wimax/i2400m/driver.c | 4 ++-- 2 files changed, 3 insertions(+), 3 deletions(-) (limited to 'drivers/net/wimax/i2400m/control.c') diff --git a/drivers/net/wimax/i2400m/control.c b/drivers/net/wimax/i2400m/control.c index f9399f2597f..07308686dbc 100644 --- a/drivers/net/wimax/i2400m/control.c +++ b/drivers/net/wimax/i2400m/control.c @@ -697,7 +697,7 @@ struct sk_buff *i2400m_msg_to_dev(struct i2400m *i2400m, rmb(); /* Make sure we see what i2400m_dev_reset_handle() */ if (i2400m->boot_mode) - return ERR_PTR(-ENODEV); + return ERR_PTR(-EL3RST); msg_l3l4_hdr = buf; /* Check msg & payload consistency */ diff --git a/drivers/net/wimax/i2400m/driver.c b/drivers/net/wimax/i2400m/driver.c index 2a093c5768c..304f0443ca4 100644 --- a/drivers/net/wimax/i2400m/driver.c +++ b/drivers/net/wimax/i2400m/driver.c @@ -453,7 +453,7 @@ error_rx_setup: i2400m_tx_release(i2400m); error_tx_setup: error_bootstrap: - if (result == -ERESTARTSYS && times-- > 0) { + if (result == -EL3RST && times-- > 0) { flags = I2400M_BRI_SOFT|I2400M_BRI_MAC_REINIT; goto retry; } @@ -560,7 +560,7 @@ void __i2400m_dev_reset_handle(struct work_struct *ws) * i2400m_dev_stop() [we are shutting down anyway, so * ignore it] or we are resetting somewhere else. */ dev_err(dev, "device rebooted\n"); - i2400m_msg_to_dev_cancel_wait(i2400m, -ERESTARTSYS); + i2400m_msg_to_dev_cancel_wait(i2400m, -EL3RST); complete(&i2400m->msg_completion); goto out; } -- cgit v1.2.3-70-g09d2