1. Jun 05, 2019
  2. Jun 04, 2019
  3. Jun 01, 2019
  4. May 31, 2019
  5. May 30, 2019
  6. May 29, 2019
    • Chris Wilson's avatar
      drm/i915/gtt: Avoid overflowing the WC stash · 7f5f2280
      Chris Wilson authored
      
      
      An interesting issue cropped with making the pagetables be allocated and
      freed concurrently (i.e. removing their grandeous struct_mutex guard)
      was that we would overflow the page stash. This happens when we have
      multiple allocators grabbing WC pages such that we fill the vm's local
      page stash and then when we free another page, the page stash is already
      full and we overflow.
      
      The fix is quite simple: to check for a full page stash before adding
      another. This results in us keeping a vm local page stash around for
      much longer, which is both a blessing and a curse.
      
      Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
      Cc: Matthew Auld <matthew.auld@intel.com>
      Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
      Reviewed-by: default avatarMatthew Auld <matthew.auld@intel.com>
      Link: https://patchwork.freedesktop.org/patch/msgid/20190529093407.31697-1-chris@chris-wilson.co.uk
      7f5f2280
    • Jani Nikula's avatar
      Revert "drm/i915: Expand subslice mask" · a10f361d
      Jani Nikula authored
      This reverts commit 1ac159e2 ("drm/i915: Expand subslice mask"),
      which kills ICL due to GEM_BUG_ON() sanity checks before CI even gets a
      chance to do anything.
      
      The commit exposes an issue in commit 1e40d4ae ("drm/i915/cnl:
      Implement WaProgramMgsrForCorrectSliceSpecificMmioReads"), which will
      also need to be addressed.
      
      There's a proposed fix [1], but considering the seeming uncertainty with
      the fix as well as the size of the regressing commit (in this context,
      the one that actually brings down ICL), this warrants a revert to get
      ICL working, and gives us time to get all of this right without
      rushing. Even if this means shooting the messenger.
      
      <3>[    9.426327] intel_sseu_get_subslices:46 GEM_BUG_ON(slice >= sseu->max_slices)
      <4>[    9.426355] ------------[ cut here ]------------
      <2>[    9.426357] kernel BUG at drivers/gpu/drm/i915/gt/intel_sseu.c:46!
      <4>[    9.426371] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI
      <4>[    9.426377] CPU: 1 PID: 364 Comm: systemd-udevd Not tainted 5.2.0-rc2-CI-CI_DRM_6159+ #1
      <4>[    9.426385] Hardware name: Intel Corporation Ice Lake Client Platform/IceLake U DDR4 SODIMM PD RVP TLC, BIOS ICLSFWR1.R00.3183.A00.1905020411 05/02/2019
      <4>[    9.426444] RIP: 0010:intel_sseu_get_subslices+0x8a/0xe0 [i915]
      <4>[    9.426452] Code: d5 76 b7 e0 48 8b 35 9d 24 21 00 49 c7 c0 07 f0 72 a0 b9 2e 00 00 00 48 c7 c2 00 8e 6d a0 48 c7 c7 a5 14 5b a0 e8 36 3c be e0 <0f> 0b 48 c7 c1 80 d5 6f a0 ba 30 00 00 00 48 c7 c6 00 8e 6d a0 48
      <4>[    9.426468] RSP: 0018:ffffc9000037b9c8 EFLAGS: 00010282
      <4>[    9.426475] RAX: 000000000000000f RBX: 0000000000000000 RCX: 0000000000000000
      <4>[    9.426482] RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff88849e346f98
      <4>[    9.426490] RBP: ffff88848a200000 R08: 0000000000000004 R09: ffff88849d50b000
      <4>[    9.426497] R10: 0000000000000000 R11: ffff88849e346f98 R12: ffff88848a209e78
      <4>[    9.426505] R13: 0000000003000000 R14: ffff88848a20b1a8 R15: 0000000000000000
      <4>[    9.426513] FS:  00007f73d5ae8680(0000) GS:ffff88849fc80000(0000) knlGS:0000000000000000
      <4>[    9.426521] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
      <4>[    9.426527] CR2: 0000561417b01260 CR3: 0000000494764003 CR4: 0000000000760ee0
      <4>[    9.426535] PKRU: 55555554
      <4>[    9.426538] Call Trace:
      <4>[    9.426585]  wa_init_mcr+0xd5/0x110 [i915]
      <4>[    9.426597]  ? lock_acquire+0xa6/0x1c0
      <4>[    9.426645]  icl_gt_workarounds_init+0x21/0x1a0 [i915]
      <4>[    9.426694]  ? i915_driver_load+0xfcf/0x18a0 [i915]
      <4>[    9.426739]  gt_init_workarounds+0x14c/0x230 [i915]
      <4>[    9.426748]  ? _raw_spin_unlock_irq+0x24/0x50
      <4>[    9.426789]  intel_gt_init_workarounds+0x1b/0x30 [i915]
      <4>[    9.426835]  i915_driver_load+0xfd7/0x18a0 [i915]
      <4>[    9.426843]  ? lock_acquire+0xa6/0x1c0
      <4>[    9.426850]  ? __pm_runtime_resume+0x4f/0x80
      <4>[    9.426857]  ? _raw_spin_unlock_irqrestore+0x4c/0x60
      <4>[    9.426863]  ? _raw_spin_unlock_irqrestore+0x4c/0x60
      <4>[    9.426870]  ? lockdep_hardirqs_on+0xe3/0x1b0
      <4>[    9.426915]  i915_pci_probe+0x29/0xa0 [i915]
      <4>[    9.426923]  pci_device_probe+0x9e/0x120
      <4>[    9.426930]  really_probe+0xea/0x3c0
      <4>[    9.426936]  driver_probe_device+0x10b/0x120
      <4>[    9.426942]  device_driver_attach+0x4a/0x50
      <4>[    9.426948]  __driver_attach+0x97/0x130
      <4>[    9.426954]  ? device_driver_attach+0x50/0x50
      <4>[    9.426960]  bus_for_each_dev+0x74/0xc0
      <4>[    9.426966]  bus_add_driver+0x13f/0x210
      <4>[    9.426971]  ? 0xffffffffa083b000
      <4>[    9.426976]  driver_register+0x56/0xe0
      <4>[    9.426982]  ? 0xffffffffa083b000
      <4>[    9.426987]  do_one_initcall+0x58/0x300
      <4>[    9.426994]  ? do_init_module+0x1d/0x1f6
      <4>[    9.427001]  ? rcu_read_lock_sched_held+0x6f/0x80
      <4>[    9.427007]  ? kmem_cache_alloc_trace+0x261/0x290
      <4>[    9.427014]  do_init_module+0x56/0x1f6
      <4>[    9.427020]  load_module+0x24d1/0x2990
      <4>[    9.427032]  ? __se_sys_finit_module+0xd3/0xf0
      <4>[    9.427037]  __se_sys_finit_module+0xd3/0xf0
      <4>[    9.427047]  do_syscall_64+0x55/0x1c0
      <4>[    9.427053]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
      <4>[    9.427059] RIP: 0033:0x7f73d5609839
      <4>[    9.427064] Code: 00 f3 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 1f f6 2c 00 f7 d8 64 89 01 48
      <4>[    9.427082] RSP: 002b:00007ffdf34477b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
      <4>[    9.427091] RAX: ffffffffffffffda RBX: 00005559fd5d7b40 RCX: 00007f73d5609839
      <4>[    9.427099] RDX: 0000000000000000 RSI: 00007f73d52e8145 RDI: 000000000000000f
      <4>[    9.427106] RBP: 00007f73d52e8145 R08: 0000000000000000 R09: 00007ffdf34478d0
      <4>[    9.427114] R10: 000000000000000f R11: 0000000000000246 R12: 0000000000000000
      <4>[    9.427121] R13: 00005559fd5c90f0 R14: 0000000000020000 R15: 00005559fd5d7b40
      <4>[    9.427131] Modules linked in: i915(+) mei_hdcp x86_pkg_temp_thermal coretemp snd_hda_intel crct10dif_pclmul crc32_pclmul snd_hda_codec snd_hwdep e1000e snd_hda_core ghash_clmulni_intel ptp snd_pcm cdc_ether usbnet mii pps_core mei_me mei prime_numbers btusb btrtl btbcm btintel bluetooth ecdh_generic ecc
      <4>[    9.427254] ---[ end trace af3eeb543bd66e66 ]---
      
      [1] http://patchwork.freedesktop.org/patch/msgid/20190528200655.11605-1-chris@chris-wilson.co.uk
      
      References: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6159/fi-icl-u2/pstore0-1517155098_Oops_1.log
      References: 1e40d4ae ("drm/i915/cnl: Implement WaProgramMgsrForCorrectSliceSpecificMmioReads")
      Fixes: 1ac159e2
      
       ("drm/i915: Expand subslice mask")
      Cc: Chris Wilson <chris@chris-wilson.co.uk>
      Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
      Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
      Cc: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
      Cc: Manasi Navare <manasi.d.navare@intel.com>
      Cc: Michel Thierry <michel.thierry@intel.com>
      Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
      Cc: Oscar Mateo <oscar.mateo@intel.com>
      Cc: Stuart Summers <stuart.summers@intel.com>
      Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
      Cc: Yunwei Zhang <yunwei.zhang@intel.com>
      Acked-by: default avatarDaniel Vetter <daniel@ffwll.ch>
      Signed-off-by: default avatarJani Nikula <jani.nikula@intel.com>
      Link: https://patchwork.freedesktop.org/patch/msgid/20190529082150.31526-1-jani.nikula@intel.com
      a10f361d
    • Chris Wilson's avatar
      drm/i915: Avoid refcount_inc on known zero count · 0c1f8457
      Chris Wilson authored
      In intel_wakeref_auto, we use refcount_inc_not_zero to detect the first
      use and initialise the timer. On doing so, we have to avoid using
      refcount_inc on that zero count as the debug code flags that as an
      error:
      	refcount_t: increment on 0; use-after-free.
      
      Rearrange the code so that if we know the count is 0 and we are
      initialising, we explicitly set it to 1.
      
      Fixes: b27e35ae
      
       ("drm/i915: Keep user GGTT alive for a minimum of 250ms")
      Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
      Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
      Reviewed-by: default avatarMika Kuoppala <mika.kuoppala@linux.intel.com>
      Link: https://patchwork.freedesktop.org/patch/msgid/20190528154053.22004-1-chris@chris-wilson.co.uk
      0c1f8457
    • Dan Carpenter's avatar
      drm/i915: selftest_lrc: Check the correct variable · 81a04d2e
      Dan Carpenter authored
      We should check "request[n]" instead of just "request".
      
      Fixes: 78e41ddd
      
       ("drm/i915: Apply an execution_mask to the virtual_engine")
      Signed-off-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
      Reviewed-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
      Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
      Link: https://patchwork.freedesktop.org/patch/msgid/20190529110355.GA19119@mwanda
      81a04d2e
    • Chris Wilson's avatar
      drm/i915: Take a runtime pm wakeref for atomic commits · 2e2f08d0
      Chris Wilson authored
      Before we start prepping the system for an atomic modeset, wake the
      device up. We then keep track of this wakeref until we complete the
      atomic commit, so we hold keep the device awake for all potential HW
      access, and do not allow the device to sleep with a pending modeset.
      
      Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=110771
      
      
      Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
      Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
      Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
      Reviewed-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
      Link: https://patchwork.freedesktop.org/patch/msgid/20190528075354.22341-1-chris@chris-wilson.co.uk
      2e2f08d0
    • Stuart Summers's avatar
      drm/i915: Expand subslice mask · 1ac159e2
      Stuart Summers authored
      
      
      Currently, the subslice_mask runtime parameter is stored as an
      array of subslices per slice. Expand the subslice mask array to
      better match what is presented to userspace through the
      I915_QUERY_TOPOLOGY_INFO ioctl. The index into this array is
      then calculated:
        slice * subslice stride + subslice index / 8
      
      v2: fix spacing in set_sseu_info args
          use set_sseu_info to initialize sseu data when building
          device status in debugfs
          rename variables in intel_engine_types.h to avoid checkpatch
          warnings
      v3: update headers in intel_sseu.h
      v4: add const to some sseu_dev_info variables
          use sseu->eu_stride for EU stride calculations
      v5: address review comments from Tvrtko and Daniele
      v6: remove extra space in intel_sseu_get_subslices
          return the correct subslice enable in for_each_instdone
          add GEM_BUG_ON to ensure user doesn't pass invalid ss_mask size
          use printk formatted string for subslice mask
      v7: remove string.h header and rebase
      
      Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
      Cc: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
      Acked-by: default avatarLionel Landwerlin <lionel.g.landwerlin@intel.com>
      Reviewed-by: default avatarDaniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
      Signed-off-by: default avatarStuart Summers <stuart.summers@intel.com>
      Signed-off-by: default avatarManasi Navare <manasi.d.navare@intel.com>
      Link: https://patchwork.freedesktop.org/patch/msgid/20190524154022.13575-6-stuart.summers@intel.com
      1ac159e2
    • Stuart Summers's avatar
      drm/i915: Refactor sseu helper functions · 0040fd19
      Stuart Summers authored
      
      
      Move functions to intel_sseu.h and remove inline qualifier.
      Additionally, ensure these are all prefixed with intel_sseu_*
      to match the convention of other functions in i915.
      
      v2: fix spacing from checkpatch warning
      v3: squash helper function changes into a single patch
          break 80 character line to fix checkpatch warning
          move get/set_eus helpers to intel_device_info.c
      v4: Remove intel_ prefix from static functions in
          intel_device_info.c and correctly copy changes
          to stride calculation in those functions.
      
      Acked-by: default avatarJani Nikula <jani.nikula@intel.com>
      Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
      Reviewed-by: default avatarDaniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
      Signed-off-by: default avatarStuart Summers <stuart.summers@intel.com>
      Signed-off-by: default avatarManasi Navare <manasi.d.navare@intel.com>
      Link: https://patchwork.freedesktop.org/patch/msgid/20190524154022.13575-5-stuart.summers@intel.com
      0040fd19
    • Stuart Summers's avatar
      drm/i915: Move calculation of subslices per slice to new function · b5ab1abe
      Stuart Summers authored
      
      
      Add a new function to return the number of subslices per slice to
      consolidate code usage.
      
      v2: rebase on changes to move sseu struct to intel_sseu.h
      v3: add intel_* prefix to sseu_subslices_per_slice
      
      Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
      Reviewed-by: default avatarDaniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
      Signed-off-by: default avatarStuart Summers <stuart.summers@intel.com>
      Signed-off-by: default avatarManasi Navare <manasi.d.navare@intel.com>
      Link: https://patchwork.freedesktop.org/patch/msgid/20190524154022.13575-4-stuart.summers@intel.com
      b5ab1abe