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wifi: mt76: wed: use proper wed reference in mt76 wed driver callabacks 

[ Upstream commit 385aab8fccd7a8746b9f1a17f3c1e38498a14bc7 ]

MT7996 driver can use both wed and wed_hif2 devices to offload traffic
from/to the wireless NIC. In the current codebase we assume to always
use the primary wed device in wed callbacks resulting in the following
crash if the hw runs wed_hif2 (e.g. 6GHz link).

[  297.455876] Unable to handle kernel read from unreadable memory at virtual address 000000000000080a
[  297.464928] Mem abort info:
[  297.467722]   ESR = 0x0000000096000005
[  297.471461]   EC = 0x25: DABT (current EL), IL = 32 bits
[  297.476766]   SET = 0, FnV = 0
[  297.479809]   EA = 0, S1PTW = 0
[  297.482940]   FSC = 0x05: level 1 translation fault
[  297.487809] Data abort info:
[  297.490679]   ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000
[  297.496156]   CM = 0, WnR = 0, TnD = 0, TagAccess = 0
[  297.501196]   GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
[  297.506500] user pgtable: 4k pages, 39-bit VAs, pgdp=0000000107480000
[  297.512927] [000000000000080a] pgd=08000001097fb003, p4d=08000001097fb003, pud=08000001097fb003, pmd=0000000000000000
[  297.523532] Internal error: Oops: 0000000096000005 [#1] SMP
[  297.715393] CPU: 2 UID: 0 PID: 45 Comm: kworker/u16:2 Tainted: G           O       6.12.50 #0
[  297.723908] Tainted: [O]=OOT_MODULE
[  297.727384] Hardware name: Banana Pi BPI-R4 (2x SFP+) (DT)
[  297.732857] Workqueue: nf_ft_offload_del nf_flow_rule_route_ipv6 [nf_flow_table]
[  297.740254] pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[  297.747205] pc : mt76_wed_offload_disable+0x64/0xa0 [mt76]
[  297.752688] lr : mtk_wed_flow_remove+0x58/0x80
[  297.757126] sp : ffffffc080fe3ae0
[  297.760430] x29: ffffffc080fe3ae0 x28: ffffffc080fe3be0 x27: 00000000deadbef7
[  297.767557] x26: ffffff80c5ebca00 x25: 0000000000000001 x24: ffffff80c85f4c00
[  297.774683] x23: ffffff80c1875b78 x22: ffffffc080d42cd0 x21: ffffffc080660018
[  297.781809] x20: ffffff80c6a076d0 x19: ffffff80c6a043c8 x18: 0000000000000000
[  297.788935] x17: 0000000000000000 x16: 0000000000000001 x15: 0000000000000000
[  297.796060] x14: 0000000000000019 x13: ffffff80c0ad8ec0 x12: 00000000fa83b2da
[  297.803185] x11: ffffff80c02700c0 x10: ffffff80c0ad8ec0 x9 : ffffff81fef96200
[  297.810311] x8 : ffffff80c02700c0 x7 : ffffff80c02700d0 x6 : 0000000000000002
[  297.817435] x5 : 0000000000000400 x4 : 0000000000000000 x3 : 0000000000000000
[  297.824561] x2 : 0000000000000001 x1 : 0000000000000800 x0 : ffffff80c6a063c8
[  297.831686] Call trace:
[  297.834123]  mt76_wed_offload_disable+0x64/0xa0 [mt76]
[  297.839254]  mtk_wed_flow_remove+0x58/0x80
[  297.843342]  mtk_flow_offload_cmd+0x434/0x574
[  297.847689]  mtk_wed_setup_tc_block_cb+0x30/0x40
[  297.852295]  nf_flow_offload_ipv6_hook+0x7f4/0x964 [nf_flow_table]
[  297.858466]  nf_flow_rule_route_ipv6+0x438/0x4a4 [nf_flow_table]
[  297.864463]  process_one_work+0x174/0x300
[  297.868465]  worker_thread+0x278/0x430
[  297.872204]  kthread+0xd8/0xdc
[  297.875251]  ret_from_fork+0x10/0x20
[  297.878820] Code: 928b5ae0 8b000273 91400a60 f943fa61 (79401421)
[  297.884901] ---[ end trace 0000000000000000 ]---

Fix the issue detecting the proper wed reference to use running wed
callabacks.

Fixes: 83eafc9251 ("wifi: mt76: mt7996: add wed tx support")
Tested-by: Daniel Pawlik <pawlik.dan@gmail.com>
Tested-by: Matteo Croce <teknoraver@meta.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://patch.msgid.link/20251008-wed-fixes-v1-1-8f7678583385@kernel.org
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Lorenzo Bianconi 2025-10-08 12:41:48 +02:00 committed by Greg Kroah-Hartman
parent cbeca0b7ea
commit d582d0e988
4 changed files with 16 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/net/wireless/mediatek/mt76/mt76.h
View File

@ -1252,6 +1252,15 @@ static inline int mt76_wed_dma_setup(struct mt76_dev *dev, struct mt76_queue *q,
#define mt76_dereference(p, dev) \
rcu_dereference_protected(p, lockdep_is_held(&(dev)->mutex))
static inline struct mt76_dev *mt76_wed_to_dev(struct mtk_wed_device *wed)
{
#ifdef CONFIG_NET_MEDIATEK_SOC_WED
if (wed->wlan.hif2)
return container_of(wed, struct mt76_dev, mmio.wed_hif2);
#endif /* CONFIG_NET_MEDIATEK_SOC_WED */
return container_of(wed, struct mt76_dev, mmio.wed);
}
static inline struct mt76_wcid *
__mt76_wcid_ptr(struct mt76_dev *dev, u16 idx)
{

1
drivers/net/wireless/mediatek/mt76/mt7996/mmio.c
View File

@ -595,6 +595,7 @@ int mt7996_mmio_wed_init(struct mt7996_dev *dev, void *pdev_ptr,
wed->wlan.nbuf = MT7996_HW_TOKEN_SIZE;
wed->wlan.token_start = MT7996_TOKEN_SIZE - wed->wlan.nbuf;
wed->wlan.hif2 = hif2;
wed->wlan.amsdu_max_subframes = 8;
wed->wlan.amsdu_max_len = 1536;

10
drivers/net/wireless/mediatek/mt76/wed.c
View File

@ -8,7 +8,7 @@
void mt76_wed_release_rx_buf(struct mtk_wed_device *wed)
{
struct mt76_dev *dev = container_of(wed, struct mt76_dev, mmio.wed);
struct mt76_dev *dev = mt76_wed_to_dev(wed);
int i;
for (i = 0; i < dev->rx_token_size; i++) {
@ -31,8 +31,8 @@ EXPORT_SYMBOL_GPL(mt76_wed_release_rx_buf);
#ifdef CONFIG_NET_MEDIATEK_SOC_WED
u32 mt76_wed_init_rx_buf(struct mtk_wed_device *wed, int size)
{
struct mt76_dev *dev = container_of(wed, struct mt76_dev, mmio.wed);
struct mtk_wed_bm_desc *desc = wed->rx_buf_ring.desc;
struct mt76_dev *dev = mt76_wed_to_dev(wed);
struct mt76_queue *q = &dev->q_rx[MT_RXQ_MAIN];
struct mt76_txwi_cache *t = NULL;
int i;
@ -80,7 +80,7 @@ EXPORT_SYMBOL_GPL(mt76_wed_init_rx_buf);
int mt76_wed_offload_enable(struct mtk_wed_device *wed)
{
struct mt76_dev *dev = container_of(wed, struct mt76_dev, mmio.wed);
struct mt76_dev *dev = mt76_wed_to_dev(wed);
spin_lock_bh(&dev->token_lock);
dev->token_size = wed->wlan.token_start;
@ -164,7 +164,7 @@ EXPORT_SYMBOL_GPL(mt76_wed_dma_setup);
void mt76_wed_offload_disable(struct mtk_wed_device *wed)
{
struct mt76_dev *dev = container_of(wed, struct mt76_dev, mmio.wed);
struct mt76_dev *dev = mt76_wed_to_dev(wed);
spin_lock_bh(&dev->token_lock);
dev->token_size = dev->drv->token_size;
@ -174,7 +174,7 @@ EXPORT_SYMBOL_GPL(mt76_wed_offload_disable);
void mt76_wed_reset_complete(struct mtk_wed_device *wed)
{
struct mt76_dev *dev = container_of(wed, struct mt76_dev, mmio.wed);
struct mt76_dev *dev = mt76_wed_to_dev(wed);
complete(&dev->mmio.wed_reset_complete);
}

1
include/linux/soc/mediatek/mtk_wed.h
View File

@ -154,6 +154,7 @@ struct mtk_wed_device {
bool wcid_512;
bool hw_rro;
bool msi;
bool hif2;
u16 token_start;
unsigned int nbuf;