From 66482e179bf463d286419319b33a46ad6a507453 Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Tue, 13 Dec 2016 12:44:52 +0100 Subject: [PATCH] ath10k: fix DMA allocation issues Signed-off-by: Felix Fietkau --- ...c-chunk-should-use-DMA_BIDIRECTIONAL.patch | 27 +++++++ ...e-host-mem-with-DMA_BIRECTIONAL-flag.patch | 81 +++++++++++++++++++ 2 files changed, 108 insertions(+) create mode 100644 package/kernel/mac80211/patches/330-ath10k-wmi-alloc-chunk-should-use-DMA_BIDIRECTIONAL.patch create mode 100644 package/kernel/mac80211/patches/331-ath10k-free-host-mem-with-DMA_BIRECTIONAL-flag.patch diff --git a/package/kernel/mac80211/patches/330-ath10k-wmi-alloc-chunk-should-use-DMA_BIDIRECTIONAL.patch b/package/kernel/mac80211/patches/330-ath10k-wmi-alloc-chunk-should-use-DMA_BIDIRECTIONAL.patch new file mode 100644 index 00000000000..4ac9bcd7d4a --- /dev/null +++ b/package/kernel/mac80211/patches/330-ath10k-wmi-alloc-chunk-should-use-DMA_BIDIRECTIONAL.patch @@ -0,0 +1,27 @@ +From: Ben Greear +Date: Tue, 29 Nov 2016 14:00:28 -0800 +Subject: [PATCH] ath10k: wmi-alloc-chunk should use DMA_BIDIRECTIONAL. + +These memory chunks are often used as 'swap' by the NIC, +so it will be both reading and writing to these areas. + +This seems to fix errors like this on my x86-64 machine: + +kernel: DMAR: DMAR:[DMA Write] Request device [05:00.0] fault addr ff5de000 + DMAR:[fault reason 05] PTE Write access is not set + +Tested-by: Marek Behun +Signed-off-by: Ben Greear +--- + +--- a/drivers/net/wireless/ath/ath10k/wmi.c ++++ b/drivers/net/wireless/ath/ath10k/wmi.c +@@ -4495,7 +4495,7 @@ static int ath10k_wmi_alloc_chunk(struct + if (!num_units) + return -ENOMEM; + +- paddr = dma_map_single(ar->dev, vaddr, pool_size, DMA_TO_DEVICE); ++ paddr = dma_map_single(ar->dev, vaddr, pool_size, DMA_BIDIRECTIONAL); + if (dma_mapping_error(ar->dev, paddr)) { + kfree(vaddr); + return -ENOMEM; diff --git a/package/kernel/mac80211/patches/331-ath10k-free-host-mem-with-DMA_BIRECTIONAL-flag.patch b/package/kernel/mac80211/patches/331-ath10k-free-host-mem-with-DMA_BIRECTIONAL-flag.patch new file mode 100644 index 00000000000..e203be0582a --- /dev/null +++ b/package/kernel/mac80211/patches/331-ath10k-free-host-mem-with-DMA_BIRECTIONAL-flag.patch @@ -0,0 +1,81 @@ +From: Ben Greear +Date: Mon, 5 Dec 2016 10:28:39 -0800 +Subject: [PATCH] ath10k: free host-mem with DMA_BIRECTIONAL flag. + +Hopefully this fixes the problem reported by Kalle: + +Noticed this in my log, but I don't have time to investigate this in +detail right now: + +[ 413.795346] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready +[ 414.158755] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready +[ 477.439659] ath10k_pci 0000:02:00.0: could not get mac80211 beacon +[ 481.666630] ------------[ cut here ]------------ +[ 481.666669] WARNING: CPU: 0 PID: 1978 at lib/dma-debug.c:1155 check_unmap+0x320/0x8e0 +[ 481.666688] ath10k_pci 0000:02:00.0: DMA-API: device driver frees DMA memory with different direction [device address=0x000000002d130000] [size=63800 bytes] [mapped with DMA_BIDIRECTIONAL] [unmapped with DMA_TO_DEVICE] +[ 481.666703] Modules linked in: ctr ccm ath10k_pci(E-) ath10k_core(E) ath(E) mac80211(E) cfg80211(E) snd_hda_codec_hdmi snd_hda_codec_idt snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_seq_midi arc4 snd_rawmidi snd_seq_midi_event snd_seq btusb btintel snd_seq_device joydev coret +[ 481.671468] CPU: 0 PID: 1978 Comm: rmmod Tainted: G E 4.9.0-rc7-wt+ #54 +[ 481.671478] Hardware name: Hewlett-Packard HP ProBook 6540b/1722, BIOS 68CDD Ver. F.04 01/27/2010 +[ 481.671489] ef49dcec c842ee92 c8b5830e ef49dd34 ef49dd20 c80850f5 c8b5a13c ef49dd50 +[ 481.671560] 000007ba c8b5830e 00000483 c8461830 c8461830 00000483 ef49ddcc f34e64b8 +[ 481.671641] c8b58360 ef49dd3c c80851bb 00000009 00000000 ef49dd34 c8b5a13c ef49dd50 +[ 481.671716] Call Trace: +[ 481.671731] [] dump_stack+0x76/0xb4 +[ 481.671745] [] __warn+0xe5/0x100 +[ 481.671757] [] ? check_unmap+0x320/0x8e0 +[ 481.671769] [] ? check_unmap+0x320/0x8e0 +[ 481.671780] [] warn_slowpath_fmt+0x3b/0x40 +[ 481.671791] [] check_unmap+0x320/0x8e0 +[ 481.671804] [] debug_dma_unmap_page+0x84/0xa0 +[ 481.671835] [] ath10k_wmi_free_host_mem+0x9a/0xe0 [ath10k_core] +[ 481.671861] [] ath10k_core_destroy+0x50/0x60 [ath10k_core] +[ 481.671875] [] ath10k_pci_remove+0x79/0xa0 [ath10k_pci] +[ 481.671889] [] pci_device_remove+0x38/0xb0 +[ 481.671901] [] __device_release_driver+0x7b/0x110 +[ 481.671913] [] driver_detach+0x97/0xa0 +[ 481.671923] [] bus_remove_driver+0x4b/0xb0 +[ 481.671934] [] driver_unregister+0x2a/0x60 +[ 481.671949] [] pci_unregister_driver+0x18/0x70 +[ 481.671965] [] ath10k_pci_exit+0xd/0x25f [ath10k_pci] +[ 481.671979] [] SyS_delete_module+0xf4/0x180 +[ 481.671995] [] ? __might_fault+0x8b/0xa0 +[ 481.672009] [] do_fast_syscall_32+0xa0/0x1e0 +[ 481.672025] [] sysenter_past_esp+0x45/0x74 +[ 481.672037] ---[ end trace 3fd23759e17e1622 ]--- +[ 481.672049] Mapped at: +[ 481.672060] [ 481.672072] [] debug_dma_map_page.part.25+0x1c/0xf0 +[ 481.672083] [ 481.672095] [] debug_dma_map_page+0x99/0xc0 +[ 481.672106] [ 481.672132] [] ath10k_wmi_alloc_chunk+0x12c/0x1f0 [ath10k_core] +[ 481.672142] [ 481.672168] [] ath10k_wmi_event_service_ready_work+0x304/0x540 [ath10k_core] +[ 481.672178] [ 481.672190] [] process_one_work+0x1c3/0x670 +[ 482.137134] ath10k_pci 0000:02:00.0: pci irq msi oper_irq_mode 2 irq_mode 0 reset_mode 0 +[ 482.313144] ath10k_pci 0000:02:00.0: Direct firmware load for ath10k/pre-cal-pci-0000:02:00.0.bin failed with error -2 +[ 482.313274] ath10k_pci 0000:02:00.0: Direct firmware load for ath10k/cal-pci-0000:02:00.0.bin failed with error -2 +[ 482.313768] ath10k_pci 0000:02:00.0: qca988x hw2.0 target 0x4100016c chip_id 0x043202ff sub 0000:0000 +[ 482.313777] ath10k_pci 0000:02:00.0: kconfig debug 1 debugfs 1 tracing 1 dfs 0 testmode 1 +[ 482.313974] ath10k_pci 0000:02:00.0: firmware ver 10.2.4.70.59-2 api 5 features no-p2p,raw-mode,mfp,allows-mesh-bcast crc32 4159f498 +[ 482.369858] ath10k_pci 0000:02:00.0: Direct firmware load for ath10k/QCA988X/hw2.0/board-2.bin failed with error -2 +[ 482.370011] ath10k_pci 0000:02:00.0: board_file api 1 bmi_id N/A crc32 bebc7c08 +[ 483.596770] ath10k_pci 0000:02:00.0: htt-ver 2.1 wmi-op 5 htt-op 2 cal otp max-sta 128 raw 0 hwcrypto 1 +[ 483.701686] ath: EEPROM regdomain: 0x0 +[ 483.701706] ath: EEPROM indicates default country code should be used +[ 483.701713] ath: doing EEPROM country->regdmn map search +[ 483.701721] ath: country maps to regdmn code: 0x3a +[ 483.701730] ath: Country alpha2 being used: US +[ 483.701737] ath: Regpair used: 0x3a + +Reported-by: Kalle Valo +Signed-off-by: Ben Greear +--- + +--- a/drivers/net/wireless/ath/ath10k/wmi.c ++++ b/drivers/net/wireless/ath/ath10k/wmi.c +@@ -8227,7 +8227,7 @@ void ath10k_wmi_free_host_mem(struct ath + dma_unmap_single(ar->dev, + ar->wmi.mem_chunks[i].paddr, + ar->wmi.mem_chunks[i].len, +- DMA_TO_DEVICE); ++ DMA_BIDIRECTIONAL); + kfree(ar->wmi.mem_chunks[i].vaddr); + } + -- 2.30.2