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6b1302f23c
Currently when nvgpu prints debug information for something like an MMU fault the result includes a lot of usless boiler plate logging spew. In some cases this can be helpful in identifying where the log message came from in the nvgpu code base. However, for debug spews from faults, the viewer of that info does not care which function printed the log (for example). Instead having a fast and readable debug dump is more valuable. So to that end, add a special debug dump printing function that does not use the normal log format. Instead, it prints only a breif prefix to use as a grep search query. The new print out is listed below. Since often the kernel logs are impressively long and obtuse, having a clear debug search string can be helpful. With this log format, one can simply do: $ grep __$CHIP__ kernel.log And find any debug logs for the desired chip. New log format - collected on a gv11b under L4T running `nvgpu_submit_mmu_fault': [ 32.005793] nvgpu: 17000000.gv11b gv11b_fb_mmu_fault_info_dump:311 [ERR] [MMU FAULT] mmu engine id: 32, ch id: 511, fault addr: 0x1000, fault addr aperture: 0, fault type: invalid pde, access type: virt read, [ 32.006137] nvgpu: 17000000.gv11b gv11b_fb_mmu_fault_info_dump:320 [ERR] [MMU FAULT] protected mode: 0, client type: hub, client id: host, gpc id if client type is gpc: 0, [ 32.006417] nvgpu: 17000000.gv11b nvgpu_rc_mmu_fault:296 [ERR] mmu fault id=0 id_type=1 act_eng_bitmask=00000000 [ 32.007125] __gv11b__ Channel Status - chip gv11b [ 32.007128] __gv11b__ --------------------------- [ 32.007241] __gv11b__ 511-gv11b, TSG: 0, pid 955, refs: 2, deterministic: [ 32.007364] __gv11b__ channel status: in use pending busy [ 32.007509] __gv11b__ RAMFC : TOP: 8000000000001000 PUT: 0000000000001030 GET: 0000000000001000 FETCH: 0000600000001000HEADER: 60400000 COUNT: 00000000SEMAPHORE: addr 0000000000000000payload 0000000000000000 execute 00000000 [ 32.007601] __gv11b__ [ 32.008696] __gv11b__ [ 32.008700] __gv11b__ PBDMA Status - chip gv11b [ 32.008894] __gv11b__ ------------------------- [ 32.013477] __gv11b__ pbdma 0: [ 32.017840] __gv11b__ id: -1 - [channel] next_id: - -1 [channel] | status: invalid [ 32.020992] __gv11b__ PBDMA_PUT 0000000000001030 PBDMA_GET 0000000000001000 [ 32.029037] __gv11b__ GP_PUT 00000001 GP_GET 00000001 FETCH 00000001 HEADER 60400000 [ 32.036386] __gv11b__ HDR 00000000 SHADOW0 00001000 SHADOW1 80003000 [ 32.044787] __gv11b__ pbdma 1: [ 32.051964] __gv11b__ id: -1 - [channel] next_id: - -1 [channel] | status: invalid [ 32.055099] __gv11b__ PBDMA_PUT 0000000042003200 PBDMA_GET 00000050728bc914 [ 32.062997] __gv11b__ GP_PUT 00000000 GP_GET 2080a000 FETCH 00000000 HEADER e1850010 [ 32.070424] __gv11b__ HDR 00110000 SHADOW0 02000000 SHADOW1 10000004 [ 32.078652] __gv11b__ pbdma 2: [ 32.085913] __gv11b__ id: -1 - [channel] next_id: - -1 [channel] | status: invalid [ 32.088973] __gv11b__ PBDMA_PUT 00000021040c0004 PBDMA_GET 0000000140020000 [ 32.096502] __gv11b__ GP_PUT 00000000 GP_GET 8080a440 FETCH 00000000 HEADER 61400040 [ 32.103679] __gv11b__ HDR 14000010 SHADOW0 00000000 SHADOW1 00000400 [ 32.112336] __gv11b__ [ 32.119860] __gv11b__ gv11b eng 0: [ 32.122119] __gv11b__ id: -1 (channel), next_id: -1 (channel), ctx status: invalid [ 32.125807] __gv11b__ [ 32.135954] __gv11b__ gv11b eng 1: [ 32.135958] __gv11b__ id: -1 (channel), next_id: -1 (channel), ctx status: invalid [ 32.139457] __gv11b__ [ 32.149945] __gv11b__ gv11b eng 2: [ 32.149950] __gv11b__ id: -1 (channel), next_id: -1 (channel), ctx status: invalid [ 32.153543] __gv11b__ [ 32.163598] __gv11b__ gv11b eng 3: [ 32.163601] __gv11b__ id: -1 (channel), next_id: -1 (channel), ctx status: invalid [ 32.167278] __gv11b__ [ 32.177076] __gv11b__ [ 32.186145] nvgpu: 17000000.gv11b nvgpu_tsg_set_ctx_mmu_error:492 [ERR] TSG 0 generated a mmu fault [ 32.189443] nvgpu: 17000000.gv11b nvgpu_set_err_notifier_locked:140 [ERR] error notifier set to 31 for ch 511 JIRA NVGPU-5541 Change-Id: Iad60adfab5198ee11dd2ec595f2422ea541b7a2a Signed-off-by: Alex Waterman <alexw@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2349166 Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>