2011/4/5 RafaÅ MiÅecki <zajec5@xxxxxxxxx>: > Signed-off-by: RafaÅ MiÅecki <zajec5@xxxxxxxxx> > --- > I believe this driver implements AI support in the proper way. This introduces > support for the *bus* and lets drivers register for specific cores. It was > tested with b43 and BCM4313, reading PHY info works fine. > > Current issues: > 1) On second (un)load: kernel BUG at mm/slab.c:500! > > TODO: > 1) DMA > 2) IRQ If you wish, I can split this into smaller pieces. I didn't do "release early, release often" because it didn't work until I implemented some final workarounds (I took me a lot of time to MMIO track bcmai+b43 vs. wl). And we already got a lot of half-working solutions. Do you have idea why I get BUG_ON on second try of using bcmai/b43? 1) unload [ 107.384571] ------------[ cut here ]------------ [ 107.384579] kernel BUG at mm/slab.c:500! [ 107.384585] invalid opcode: 0000 [#1] PREEMPT SMP [ 107.384592] last sysfs file: /sys/bus/bcmai/drivers/b43/uevent [ 107.384599] Modules linked in: bcmai(-) ssb mmc_core pcmcia pcmcia_core mac80211 cfg80211 rfkill ip6t_LOG xt_tcpudp xt_pkttype ipt_LOG xt_limit af_packet snd_pcm_oss snd_mixer_oss snd_seq snd_seq_device edd ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_raw xt_NOTRACK ipt_REJECT iptable_raw iptable_filter ip6table_mangle nf_conntrack_netbios_ns nf_conntrack_broadcast nf_conntrack_ipv4 nf_defrag_ipv4 ip_tables xt_conntrack nf_conntrack ip6table_filter ip6_tables x_tables ext3 jbd dm_mod snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm ppdev parport_pc snd_timer ns558 button parport gameport snd forcedeth sg pata_amd pcspkr serio_raw k8temp i2c_nforce2 soundcore floppy snd_page_alloc ext4 mbcache jbd2 crc16 sd_mod fan processor ata_generic pata_via pata_jmicron sata_nv sata_via thermal thermal_sys [last unloaded: b43] [ 107.384709] [ 107.384714] Pid: 1730, comm: rmmod Not tainted 2.6.39-rc1-wl-b43+ #19 K8NF4G-SATA2/K8NF4G-SATA2 [ 107.384727] EIP: 0060:[<c03126e5>] EFLAGS: 00010046 CPU: 0 [ 107.384741] EIP is at kfree+0x145/0x200 [ 107.384747] EAX: dab75500 EBX: da108800 ECX: 00000000 EDX: dab75500 [ 107.384754] ESI: 00000286 EDI: db9a8000 EBP: d9111e94 ESP: d9111e78 [ 107.384761] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 [ 107.384768] Process rmmod (pid: 1730, ti=d9110000 task=d78d2230 task.ti=d9110000) [ 107.384775] Stack: [ 107.384779] c03f8b9d 00000102 dd7a2a52 da108800 da108800 db9a8000 da108860 d9111ea8 [ 107.384792] dd7a2a52 da108860 da108800 da108930 d9111ec0 c03fae8f dd7a34e0 da108860 [ 107.384804] dd7a3510 da108894 d9111ed0 c048d8ac da108860 dd7a3510 d9111ee4 c048e00f [ 107.384817] Call Trace: [ 107.384827] [<c03f8b9d>] ? do_pci_disable_device+0x4d/0x60 [ 107.384839] [<dd7a2a52>] ? bcmai_host_pci_remove+0x42/0x60 [bcmai] [ 107.384849] [<dd7a2a52>] bcmai_host_pci_remove+0x42/0x60 [bcmai] [ 107.384857] [<c03fae8f>] pci_device_remove+0x3f/0xf0 [ 107.384868] [<c048d8ac>] __device_release_driver+0x4c/0xa0 [ 107.384876] [<c048e00f>] driver_detach+0x8f/0xa0 [ 107.384884] [<c048d75c>] bus_remove_driver+0x6c/0xe0 [ 107.384893] [<c048e371>] driver_unregister+0x41/0x70 [ 107.384901] [<c037774f>] ? sysfs_remove_file+0xf/0x20 [ 107.384909] [<c03fab9d>] pci_unregister_driver+0x2d/0x80 [ 107.384918] [<dd7a2c31>] b43_pci_ai_bridge_exit+0xd/0xf [bcmai] [ 107.384926] [<dd7a2c18>] bcmai_modexit+0x8/0x14 [bcmai] [ 107.384936] [<c02819f9>] sys_delete_module+0x129/0x200 [ 107.384945] [<c02fa276>] ? do_munmap+0x1f6/0x270 [ 107.384952] [<c02f9ff0>] ? arch_get_unmapped_area_topdown+0x170/0x170 [ 107.384963] [<c063d798>] sysenter_do_call+0x12/0x28 [ 107.384969] Code: ed 89 e0 25 00 e0 ff ff 83 68 14 01 8b 40 08 a8 08 0f 84 e5 fe ff ff e8 8a 2d 32 00 e9 db fe ff ff 8b 50 0c 66 90 e9 20 ff ff ff <0f> 0b 8b 52 0c e9 21 ff ff ff 8b 45 ec 89 da e8 d7 fd ff ff 8b [ 107.385020] EIP: [<c03126e5>] kfree+0x145/0x200 SS:ESP 0068:d9111e78 [ 107.385020] ---[ end trace 29913fd146dc41d3 ]--- 2) load Apr 5 21:36:27 linux-pglt kernel: [ 59.920145] ------------[ cut here ]------------ Apr 5 21:36:27 linux-pglt kernel: [ 59.920154] kernel BUG at mm/slab.c:3058! Apr 5 21:36:27 linux-pglt kernel: [ 59.920160] invalid opcode: 0000 [#1] PREEMPT SMP Apr 5 21:36:27 linux-pglt kernel: [ 59.920168] last sysfs file: /sys/bus/bcmai/drivers/b43/uevent Apr 5 21:36:27 linux-pglt kernel: [ 59.920174] Modules linked in: bcmai(+) ssb mmc_core pcmcia pcmcia_core mac80211 cfg80211 rfkill ip6t_LOG xt_tcpudp xt_pkttype ipt_LOG xt_limit af_packet snd_pcm_oss snd_mixer_oss snd_seq snd_seq_device edd ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_raw xt_NOTRACK ipt_REJECT iptable_raw iptable_filter ip6table_mangle nf_conntrack_netbios_ns nf_conntrack_broadcast nf_conntrack_ipv4 nf_defrag_ipv4 ip_tables xt_conntrack nf_conntrack ip6table_filter ip6_tables x_tables ext3 jbd dm_mod snd_intel8x0 ppdev snd_ac97_codec parport_pc ac97_bus snd_pcm parport ns558 k8temp forcedeth sg serio_raw pcspkr floppy snd_timer gameport pata_amd snd button soundcore i2c_nforce2 snd_page_alloc ext4 mbcache jbd2 crc16 sd_mod fan processor ata_generic pata_via pata_jmicron sata_nv sata_via thermal thermal_sys [last unloaded: bcmai] Apr 5 21:36:27 linux-pglt kernel: [ 59.920285] Apr 5 21:36:27 linux-pglt kernel: [ 59.920290] Pid: 1832, comm: work_for_cpu Not tainted 2.6.39-rc1-wl-b43+ #19 K8NF4G-SATA2/K8NF4G-SATA2 Apr 5 21:36:27 linux-pglt kernel: [ 59.920304] EIP: 0060:[<c03112d3>] EFLAGS: 00010082 CPU: 0 Apr 5 21:36:27 linux-pglt kernel: [ 59.920318] EIP is at cache_alloc_refill+0x263/0x280 Apr 5 21:36:27 linux-pglt kernel: [ 59.920325] EAX: db9ae620 EBX: ffffffff ECX: da002540 EDX: da002548 Apr 5 21:36:27 linux-pglt kernel: [ 59.920332] ESI: da005040 EDI: 00000004 EBP: d7d2df48 ESP: d7d2df10 Apr 5 21:36:27 linux-pglt kernel: [ 59.920340] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 Apr 5 21:36:27 linux-pglt kernel: [ 59.920348] Process work_for_cpu (pid: 1832, ti=d7d2c000 task=d91e9310 task.ti=d7d2c000) Apr 5 21:36:27 linux-pglt kernel: [ 59.920355] Stack: Apr 5 21:36:27 linux-pglt kernel: [ 59.920359] c0919623 0000000f 00000000 da002564 000492d0 da002550 da002548 da002540 Apr 5 21:36:27 linux-pglt kernel: [ 59.920372] d91e0020 da005040 da002e80 da005040 00000202 da108800 d7d2df78 c0311d4a Apr 5 21:36:27 linux-pglt kernel: [ 59.920384] 0000000d 00000007 00000246 da108800 00001740 000080d0 000080d0 da108800 Apr 5 21:36:27 linux-pglt kernel: [ 59.920397] Call Trace: Apr 5 21:36:27 linux-pglt kernel: [ 59.920405] [<c0311d4a>] kmem_cache_alloc_trace+0x11a/0x160 Apr 5 21:36:27 linux-pglt kernel: [ 59.920420] [<dd844a72>] bcmai_host_pci_probe+0x32/0x194 [bcmai] Apr 5 21:36:27 linux-pglt kernel: [ 59.920432] [<c03f9bd2>] local_pci_probe+0x42/0xb0 Apr 5 21:36:27 linux-pglt kernel: [ 59.920441] [<c0261b80>] ? wake_up_worker+0x20/0x20 Apr 5 21:36:27 linux-pglt kernel: [ 59.920448] [<c0261b8c>] do_work_for_cpu+0xc/0x20 Apr 5 21:36:27 linux-pglt kernel: [ 59.920457] [<c0268424>] kthread+0x74/0x80 Apr 5 21:36:27 linux-pglt kernel: [ 59.920465] [<c02683b0>] ? kthread_worker_fn+0x160/0x160 Apr 5 21:36:27 linux-pglt kernel: [ 59.920475] [<c063dd36>] kernel_thread_helper+0x6/0xd Apr 5 21:36:27 linux-pglt kernel: [ 59.920481] Code: 00 e8 12 fb ff ff 8b 75 ec 64 8b 15 24 e1 8b c0 8b 14 96 85 c0 89 55 f0 74 13 8b 45 f0 83 38 00 0f 84 b7 fd ff ff e9 63 ff ff ff <0f> 0b 83 3a 00 0f 85 58 ff ff ff 66 90 e9 69 ff ff ff 8d 74 26 Apr 5 21:36:27 linux-pglt kernel: [ 59.920532] EIP: [<c03112d3>] cache_alloc_refill+0x263/0x280 SS:ESP 0068:d7d2df10 Apr 5 21:36:27 linux-pglt kernel: [ 59.920545] ---[ end trace 16e2bc5201afa686 ]--- -- RafaÅ -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
