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mac80211: brcmfmac: early work on FullMAC firmware crash recovery

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Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
This commit is contained in:
Rafał Miłecki
2019-04-18 11:47:43 +02:00
parent 1a6d7a651f
commit 02aed76968
6 changed files with 335 additions and 0 deletions
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29
package/kernel/mac80211/patches/381-v5.1-0011-brcmfmac-fix-size-of-the-struct-msgbuf_ring_status.patch Normal file
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@@ -0,0 +1,29 @@
From 0c7051610c577b60b01b3b5aec14d6765e177b0d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
Date: Thu, 21 Feb 2019 11:33:24 +0100
Subject: [PATCH] brcmfmac: fix size of the struct msgbuf_ring_status
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
This updates host struct to match the in-firmawre definition. It's a
cosmetic change as it only applies to the reserved struct space.
Fixes: c988b78244df ("brcmfmac: print firmware reported ring status errors")
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
---
drivers/net/wireless/broadcom/brcm80211/brcmfmac/msgbuf.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/msgbuf.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/msgbuf.c
@@ -139,7 +139,7 @@ struct msgbuf_ring_status {
struct msgbuf_common_hdr msg;
struct msgbuf_completion_hdr compl_hdr;
__le16 write_idx;
- __le32 rsvd0[5];
+ __le16 rsvd0[5];
};
struct msgbuf_rx_event {

69
package/kernel/mac80211/patches/381-v5.1-0012-brcmfmac-print-firmware-reported-general-status-erro.patch Normal file
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@@ -0,0 +1,69 @@
From c91377495192cda096e52dc09c266b0d05f16d86 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
Date: Thu, 21 Feb 2019 11:33:25 +0100
Subject: [PATCH] brcmfmac: print firmware reported general status errors
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Firmware may report general errors using a special message type. Add
basic support for it by simply decoding & printing an error number.
A sample situation in which firmware reports a buf error:
CONSOLE: 027084.733 no host response IOCTL buffer available..so fail the request
will now produce a "Firmware reported general error: 9" on the host.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
---
.../broadcom/brcm80211/brcmfmac/msgbuf.c | 24 +++++++++++++++++++
1 file changed, 24 insertions(+)
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/msgbuf.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/msgbuf.c
@@ -134,6 +134,14 @@ struct msgbuf_completion_hdr {
__le16 flow_ring_id;
};
+/* Data struct for the MSGBUF_TYPE_GEN_STATUS */
+struct msgbuf_gen_status {
+ struct msgbuf_common_hdr msg;
+ struct msgbuf_completion_hdr compl_hdr;
+ __le16 write_idx;
+ __le32 rsvd0[3];
+};
+
/* Data struct for the MSGBUF_TYPE_RING_STATUS */
struct msgbuf_ring_status {
struct msgbuf_common_hdr msg;
@@ -1194,6 +1202,18 @@ brcmf_msgbuf_process_rx_complete(struct
brcmf_netif_rx(ifp, skb);
}
+static void brcmf_msgbuf_process_gen_status(struct brcmf_msgbuf *msgbuf,
+ void *buf)
+{
+ struct msgbuf_gen_status *gen_status = buf;
+ struct brcmf_pub *drvr = msgbuf->drvr;
+ int err;
+
+ err = le16_to_cpu(gen_status->compl_hdr.status);
+ if (err)
+ bphy_err(drvr, "Firmware reported general error: %d\n", err);
+}
+
static void brcmf_msgbuf_process_ring_status(struct brcmf_msgbuf *msgbuf,
void *buf)
{
@@ -1273,6 +1293,10 @@ static void brcmf_msgbuf_process_msgtype
msg = (struct msgbuf_common_hdr *)buf;
switch (msg->msgtype) {
+ case MSGBUF_TYPE_GEN_STATUS:
+ brcmf_dbg(MSGBUF, "MSGBUF_TYPE_GEN_STATUS\n");
+ brcmf_msgbuf_process_gen_status(msgbuf, buf);
+ break;
case MSGBUF_TYPE_RING_STATUS:
brcmf_dbg(MSGBUF, "MSGBUF_TYPE_RING_STATUS\n");
brcmf_msgbuf_process_ring_status(msgbuf, buf);

84
package/kernel/mac80211/patches/450-v5.2-0001-brcmfmac-fix-race-during-disconnect-when-USB-complet.patch Normal file
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From db3b9e2e1d58080d0754bdf9293dabf8c6491b67 Mon Sep 17 00:00:00 2001
From: Piotr Figiel <p.figiel@camlintechnologies.com>
Date: Fri, 8 Mar 2019 15:25:04 +0000
Subject: [PATCH] brcmfmac: fix race during disconnect when USB completion is
in progress
It was observed that rarely during USB disconnect happening shortly after
connect (before full initialization completes) usb_hub_wq would wait
forever for the dev_init_lock to be unlocked. dev_init_lock would remain
locked though because of infinite wait during usb_kill_urb:
[ 2730.656472] kworker/0:2 D 0 260 2 0x00000000
[ 2730.660700] Workqueue: events request_firmware_work_func
[ 2730.664807] [<809dca20>] (__schedule) from [<809dd164>] (schedule+0x4c/0xac)
[ 2730.670587] [<809dd164>] (schedule) from [<8069af44>] (usb_kill_urb+0xdc/0x114)
[ 2730.676815] [<8069af44>] (usb_kill_urb) from [<7f258b50>] (brcmf_usb_free_q+0x34/0xa8 [brcmfmac])
[ 2730.684833] [<7f258b50>] (brcmf_usb_free_q [brcmfmac]) from [<7f2517d4>] (brcmf_detach+0xa0/0xb8 [brcmfmac])
[ 2730.693557] [<7f2517d4>] (brcmf_detach [brcmfmac]) from [<7f251a34>] (brcmf_attach+0xac/0x3d8 [brcmfmac])
[ 2730.702094] [<7f251a34>] (brcmf_attach [brcmfmac]) from [<7f2587ac>] (brcmf_usb_probe_phase2+0x468/0x4a0 [brcmfmac])
[ 2730.711601] [<7f2587ac>] (brcmf_usb_probe_phase2 [brcmfmac]) from [<7f252888>] (brcmf_fw_request_done+0x194/0x220 [brcmfmac])
[ 2730.721795] [<7f252888>] (brcmf_fw_request_done [brcmfmac]) from [<805748e4>] (request_firmware_work_func+0x4c/0x88)
[ 2730.731125] [<805748e4>] (request_firmware_work_func) from [<80141474>] (process_one_work+0x228/0x808)
[ 2730.739223] [<80141474>] (process_one_work) from [<80141a80>] (worker_thread+0x2c/0x564)
[ 2730.746105] [<80141a80>] (worker_thread) from [<80147bcc>] (kthread+0x13c/0x16c)
[ 2730.752227] [<80147bcc>] (kthread) from [<801010b4>] (ret_from_fork+0x14/0x20)
[ 2733.099695] kworker/0:3 D 0 1065 2 0x00000000
[ 2733.103926] Workqueue: usb_hub_wq hub_event
[ 2733.106914] [<809dca20>] (__schedule) from [<809dd164>] (schedule+0x4c/0xac)
[ 2733.112693] [<809dd164>] (schedule) from [<809e2a8c>] (schedule_timeout+0x214/0x3e4)
[ 2733.119621] [<809e2a8c>] (schedule_timeout) from [<809dde2c>] (wait_for_common+0xc4/0x1c0)
[ 2733.126810] [<809dde2c>] (wait_for_common) from [<7f258d00>] (brcmf_usb_disconnect+0x1c/0x4c [brcmfmac])
[ 2733.135206] [<7f258d00>] (brcmf_usb_disconnect [brcmfmac]) from [<8069e0c8>] (usb_unbind_interface+0x5c/0x1e4)
[ 2733.143943] [<8069e0c8>] (usb_unbind_interface) from [<8056d3e8>] (device_release_driver_internal+0x164/0x1fc)
[ 2733.152769] [<8056d3e8>] (device_release_driver_internal) from [<8056c078>] (bus_remove_device+0xd0/0xfc)
[ 2733.161138] [<8056c078>] (bus_remove_device) from [<8056977c>] (device_del+0x11c/0x310)
[ 2733.167939] [<8056977c>] (device_del) from [<8069cba8>] (usb_disable_device+0xa0/0x1cc)
[ 2733.174743] [<8069cba8>] (usb_disable_device) from [<8069507c>] (usb_disconnect+0x74/0x1dc)
[ 2733.181823] [<8069507c>] (usb_disconnect) from [<80695e88>] (hub_event+0x478/0xf88)
[ 2733.188278] [<80695e88>] (hub_event) from [<80141474>] (process_one_work+0x228/0x808)
[ 2733.194905] [<80141474>] (process_one_work) from [<80141a80>] (worker_thread+0x2c/0x564)
[ 2733.201724] [<80141a80>] (worker_thread) from [<80147bcc>] (kthread+0x13c/0x16c)
[ 2733.207913] [<80147bcc>] (kthread) from [<801010b4>] (ret_from_fork+0x14/0x20)
It was traced down to a case where usb_kill_urb would be called on an URB
structure containing more or less random data, including large number in
its use_count. During the debugging it appeared that in brcmf_usb_free_q()
the traversal over URBs' lists is not synchronized with operations on those
lists in brcmf_usb_rx_complete() leading to handling
brcmf_usbdev_info structure (holding lists' head) as lists' element and in
result causing above problem.
Fix it by walking through all URBs during brcmf_cancel_all_urbs using the
arrays of requests instead of linked lists.
Signed-off-by: Piotr Figiel <p.figiel@camlintechnologies.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
---
drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c
@@ -684,12 +684,18 @@ static int brcmf_usb_up(struct device *d
static void brcmf_cancel_all_urbs(struct brcmf_usbdev_info *devinfo)
{
+ int i;
+
if (devinfo->ctl_urb)
usb_kill_urb(devinfo->ctl_urb);
if (devinfo->bulk_urb)
usb_kill_urb(devinfo->bulk_urb);
- brcmf_usb_free_q(&devinfo->tx_postq, true);
- brcmf_usb_free_q(&devinfo->rx_postq, true);
+ if (devinfo->tx_reqs)
+ for (i = 0; i < devinfo->bus_pub.ntxq; i++)
+ usb_kill_urb(devinfo->tx_reqs[i].urb);
+ if (devinfo->rx_reqs)
+ for (i = 0; i < devinfo->bus_pub.nrxq; i++)
+ usb_kill_urb(devinfo->rx_reqs[i].urb);
}
static void brcmf_usb_down(struct device *dev)

54
package/kernel/mac80211/patches/450-v5.2-0002-brcmfmac-remove-pending-parameter-from-brcmf_usb_fre.patch Normal file
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@@ -0,0 +1,54 @@
From 2b78e5f5223666d403d4fdb30af4ad65c8da3cdb Mon Sep 17 00:00:00 2001
From: Piotr Figiel <p.figiel@camlintechnologies.com>
Date: Fri, 8 Mar 2019 15:25:06 +0000
Subject: [PATCH] brcmfmac: remove pending parameter from brcmf_usb_free_q
brcmf_usb_free_q is no longer called with pending=true thus this boolean
parameter is no longer needed.
Signed-off-by: Piotr Figiel <p.figiel@camlintechnologies.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
---
.../wireless/broadcom/brcm80211/brcmfmac/usb.c | 15 ++++++---------
1 file changed, 6 insertions(+), 9 deletions(-)
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c
@@ -445,9 +445,10 @@ fail:
}
-static void brcmf_usb_free_q(struct list_head *q, bool pending)
+static void brcmf_usb_free_q(struct list_head *q)
{
struct brcmf_usbreq *req, *next;
+
int i = 0;
list_for_each_entry_safe(req, next, q, list) {
if (!req->urb) {
@@ -455,12 +456,8 @@ static void brcmf_usb_free_q(struct list
break;
}
i++;
- if (pending) {
- usb_kill_urb(req->urb);
- } else {
- usb_free_urb(req->urb);
- list_del_init(&req->list);
- }
+ usb_free_urb(req->urb);
+ list_del_init(&req->list);
}
}
@@ -1031,8 +1028,8 @@ static void brcmf_usb_detach(struct brcm
brcmf_dbg(USB, "Enter, devinfo %p\n", devinfo);
/* free the URBS */
- brcmf_usb_free_q(&devinfo->rx_freeq, false);
- brcmf_usb_free_q(&devinfo->tx_freeq, false);
+ brcmf_usb_free_q(&devinfo->rx_freeq);
+ brcmf_usb_free_q(&devinfo->tx_freeq);
usb_free_urb(devinfo->ctl_urb);
usb_free_urb(devinfo->bulk_urb);

29
package/kernel/mac80211/patches/450-v5.2-0003-brcmfmac-remove-unused-variable-i-from-brcmf_usb_fre.patch Normal file
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@@ -0,0 +1,29 @@
From 504f06725d015954a0fcafdf1d90a6795ca8f769 Mon Sep 17 00:00:00 2001
From: Piotr Figiel <p.figiel@camlintechnologies.com>
Date: Fri, 8 Mar 2019 15:25:09 +0000
Subject: [PATCH] brcmfmac: remove unused variable i from brcmf_usb_free_q
Variable i is not used so remove it.
Signed-off-by: Piotr Figiel <p.figiel@camlintechnologies.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
---
drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c | 2 --
1 file changed, 2 deletions(-)
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c
@@ -449,13 +449,11 @@ static void brcmf_usb_free_q(struct list
{
struct brcmf_usbreq *req, *next;
- int i = 0;
list_for_each_entry_safe(req, next, q, list) {
if (!req->urb) {
brcmf_err("bad req\n");
break;
}
- i++;
usb_free_urb(req->urb);
list_del_init(&req->list);
}

70
package/kernel/mac80211/patches/865-brcmfmac-get-RAM-info-right-before-downloading-PCIe-.patch Normal file
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@@ -0,0 +1,70 @@
From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
Subject: [PATCH] brcmfmac: get RAM info right before downloading PCIe firmware
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
It's important as brcmf_chip_get_raminfo() also makes sure that memory
is properly setup. Without it the firmware could report invalid RAM
address like 0x04000001.
During a normal brcmfmac lifetime brcmf_chip_get_raminfo() is called on
probe by the brcmf_chip_recognition(). This change allows implementing
further improvements like handling errors by resetting a device with
the brcmf_pcie_reset_device() and redownloading a firmware afterwards.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
---
drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c | 6 ++++--
drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.h | 1 +
drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c | 6 ++++++
3 files changed, 11 insertions(+), 2 deletions(-)
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c
@@ -700,8 +700,10 @@ static u32 brcmf_chip_tcm_rambase(struct
return 0;
}
-static int brcmf_chip_get_raminfo(struct brcmf_chip_priv *ci)
+int brcmf_chip_get_raminfo(struct brcmf_chip *pub)
{
+ struct brcmf_chip_priv *ci = container_of(pub, struct brcmf_chip_priv,
+ pub);
struct brcmf_core_priv *mem_core;
struct brcmf_core *mem;
@@ -981,7 +983,7 @@ static int brcmf_chip_recognition(struct
brcmf_chip_set_passive(&ci->pub);
}
- return brcmf_chip_get_raminfo(ci);
+ return brcmf_chip_get_raminfo(&ci->pub);
}
static void brcmf_chip_disable_arm(struct brcmf_chip_priv *chip, u16 id)
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.h
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.h
@@ -80,6 +80,7 @@ struct brcmf_buscore_ops {
void (*activate)(void *ctx, struct brcmf_chip *chip, u32 rstvec);
};
+int brcmf_chip_get_raminfo(struct brcmf_chip *pub);
struct brcmf_chip *brcmf_chip_attach(void *ctx,
const struct brcmf_buscore_ops *ops);
void brcmf_chip_detach(struct brcmf_chip *chip);
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
@@ -1727,6 +1727,12 @@ static void brcmf_pcie_setup(struct devi
nvram_len = fwreq->items[BRCMF_PCIE_FW_NVRAM].nv_data.len;
kfree(fwreq);
+ ret = brcmf_chip_get_raminfo(devinfo->ci);
+ if (ret) {
+ brcmf_err(bus, "Failed to get RAM info\n");
+ goto fail;
+ }
+
/* Some of the firmwares have the size of the memory of the device
* defined inside the firmware. This is because part of the memory in
* the device is shared and the devision is determined by FW. Parse