Due to the request replay, context switch interrupt may come after
gvt free the workload thus can cause a kernel NULL pointer kernel
panic. This patch will add a simple check to avoid this for a short
term.

From long term, gvt workload lifecycle doesn't match with i915 request
and need to find a proper way to manage this.

v4: simplify the NULL pointer check.
v5: add unlikely to optimize.
Signed-off-by: NChuanxiao Dong <chuanxiao.dong@intel.com>
Signed-off-by: NZhenyu Wang <zhenyuw@linux.intel.com>

Windows guest will notitfy GVT-g to request more resources through g2v
interface, when its resources are not enough.
This patch is to handle this case and let vgpu enter failsafe mode to
avoid too many error messages.
Signed-off-by: NMin He <min.he@intel.com>
Signed-off-by: NPei Zhang <pei.zhang@intel.com>
Signed-off-by: NZhenyu Wang <zhenyuw@linux.intel.com>

Lots of reduntant log info will be printed out during GPU reset,
including accessing untracked mmio register and fence register,
variable disable_warn_untrack is added previously to handle the
situation, but the accessing of fence register is ignored in the
previously patch, so add it back.

Besides, set the variable disable_warn_untrack to the defalut value
after GPU reset is finished.
Signed-off-by: NZhao, Xinda <xinda.zhao@intel.com>
Signed-off-by: NZhenyu Wang <zhenyuw@linux.intel.com>

New failsafe mode is introduced, when we detect guest not supporting
GVT-g.
In failsafe mode, we will ignore all the MMIO and cfg space read/write
from guest.

This patch can fix the issue that when guest kernel or graphics driver
version is too low, there will be a lot of kernel traces in host.

V5: rebased onto latest gvt-staging
V4: changed coding style by Zhenyu and Ping's advice
V3: modified coding style and error messages according to Zhenyu's comment
V2: 1) implemented MMIO/GTT/WP pages read/write logic; 2) used a unified
function to enter failsafe mode
Signed-off-by: NMin He <min.he@intel.com>
Signed-off-by: NPei Zhang <pei.zhang@intel.com>
Signed-off-by: NZhenyu Wang <zhenyuw@linux.intel.com>

As we switched to memremap for opregion, shouldn't use any __iomem
for that, and move to use memcpy instead.

This fixed static check errors for:

  CHECK   drivers/gpu/drm/i915//gvt/opregion.c
  drivers/gpu/drm/i915//gvt/opregion.c:142:31: warning: incorrect type in argument 1 (different address spaces)
  drivers/gpu/drm/i915//gvt/opregion.c:142:31:    expected void *addr
  drivers/gpu/drm/i915//gvt/opregion.c:142:31:    got void [noderef] <asn:2>*opregion_va
  drivers/gpu/drm/i915//gvt/opregion.c:160:35: warning: incorrect type in assignment (different address spaces)
  drivers/gpu/drm/i915//gvt/opregion.c:160:35:    expected void [noderef] <asn:2>*opregion_va
  drivers/gpu/drm/i915//gvt/opregion.c:160:35:    got void *
Signed-off-by: NZhenyu Wang <zhenyuw@linux.intel.com>

When doing dma map failed for a pfn, kvmgt should unpin the
pfn and return error code to device module driver
Signed-off-by: NChuanxiao Dong <chuanxiao.dong@intel.com>
Cc: xinda.zhao@intel.com
Signed-off-by: NZhenyu Wang <zhenyuw@linux.intel.com>

For the inhibit ctx, load all mmio in render mmio list
into HW by MMIO write for ctx initialization.

For the none-inhibit ctx, only load the render mmio which
is not in_context into HW by MMIO write. Skip the MMIO write
for in_context mmio as context image will load it.
Signed-off-by: NChuanxiao Dong <chuanxiao.dong@intel.com>
Signed-off-by: NZhenyu Wang <zhenyuw@linux.intel.com>

* Add flip done event support for sprite plane on SKL platform.
* Fix bug #1452, "Call Trace:handle_default_event_virt+0xef/0x100
[i915]" while booting up guest.
Signed-off-by: NXu Han <xu.han@intel.com>
Signed-off-by: NZhenyu Wang <zhenyuw@linux.intel.com>

We also need reset vGPU virtual display emulation. Since all vreg has
been cleared, we need reset display related vreg to reflect our display
setting.
Signed-off-by: NChangbin Du <changbin.du@intel.com>
Cc: Ping Gao <ping.a.gao@intel.com>
Signed-off-by: NZhenyu Wang <zhenyuw@linux.intel.com>

We need to be careful to only update addr mode for gvt shadow context
descriptor but keep other valid config. This fixes GPU hang caused by
invalid descriptor submitted for gvt workload.
Signed-off-by: NZhenyu Wang <zhenyuw@linux.intel.com>

We need to properly setup alignment for GTT start/end/size
as required. Fixed warning from i915 gem.
Signed-off-by: NZhenyu Wang <zhenyuw@linux.intel.com>

In function dispatch_workload(), if it fail before calling
intel_gvt_scan_and_shadow_wa_ctx(), the indirect ctx will
not be shadowed so no cleaup need. wa_ctx->indirect_ctx.obj
indicate whether indirect_ctx is shadowed. The obj is null
if it is unshadowed.

BUG: unable to handle kernel NULL pointer dereference at
00000000000001a0
IP: complete_execlist_workload+0x2c9/0x3e0 [i915]
Oops: 0002 [#1] SMP
task: ffff939546d2d880 task.stack: ffffbd9b82ac4000
RIP: 0010:complete_execlist_workload+0x2c9/0x3e0 [i915]
RSP: 0018:ffffbd9b82ac7dd8 EFLAGS: 00010202
RAX: 0000000000000000 RBX: ffff9393c725b540 RCX: 0000000000000006
RDX: 0000000000000007 RSI: 0000000000000202 RDI: ffff939559c8dd00
RBP: ffffbd9b82ac7e18 R08: 0000000000000001 R09: 000000000120dd8f
R10: 0000000000000000 R11: 000000000120dd8f R12: ffff9393c725b540
R13: ffff9393c725b618 R14: ffffbd9b81f0d000 R15: ffff939520e0e000
FS:  0000000000000000(0000) GS:ffff939559c80000(0000)
knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000000001a0 CR3: 000000043d664000 CR4: 00000000003426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 workload_thread+0x312/0xd70 [i915]
 ? __wake_up_sync+0x20/0x20
 ? wake_atomic_t_function+0x60/0x60
 kthread+0x101/0x140
Signed-off-by: NChangbin Du <changbin.du@intel.com>
Signed-off-by: NZhenyu Wang <zhenyuw@linux.intel.com>

gvt driver has a check which doesn't allow to use gvt when host
gpu iommu is enabled. This check can be removed after enable the
iommu support in gvt
Signed-off-by: NChuanxiao Dong <chuanxiao.dong@intel.com>
Signed-off-by: NZhenyu Wang <zhenyuw@linux.intel.com>

When host i915 iommu enabled, gvt needs to use a mapped pfn in PTE entry
So before kvm returns the pfn, map this pfn and return the mapped address
which is so called iova.
Signed-off-by: NChuanxiao Dong <chuanxiao.dong@intel.com>
Signed-off-by: NZhenyu Wang <zhenyuw@linux.intel.com>

MFN usually refers to "Machine Frame Number" in virtulization world.
Currently GVT-g populates the shadow PPGTT/GGTT page table with MFN
according to the translation between MFN and Guest PFN.

When host IOMMU is enabled, GPU DMA transactions go through the IOMMU,
GPU needs an IOVA<->MFN mapping to walk the shadow page table in host
main memory.

This patch will map a page in IOMMU page table before using it in shadow
page table and release the map when a shadow page is going to be freed.
Signed-off-by: NZhi Wang <zhi.a.wang@intel.com>
Signed-off-by: NChuanxiao Dong <chuanxiao.dong@intel.com>
Signed-off-by: NZhenyu Wang <zhenyuw@linux.intel.com>

Reduce the line of logs in below functions and log friendly.
  o intel_vgpu_reg_imr_handler
  o intel_vgpu_reg_master_irq_handler
  o intel_vgpu_reg_ier_handler
  o intel_vgpu_reg_iir_handler
Signed-off-by: NChangbin Du <changbin.du@intel.com>
Signed-off-by: NZhenyu Wang <zhenyuw@linux.intel.com>

Remove a redundant end of line in below log.
  'will complete workload %p\n, status: %d\n'
Signed-off-by: NChangbin Du <changbin.du@intel.com>
Signed-off-by: NZhenyu Wang <zhenyuw@linux.intel.com>

Remove below unimportant log which is too noisy.
  'no current vgpu search from q head'
Signed-off-by: NChangbin Du <changbin.du@intel.com>
Signed-off-by: NZhenyu Wang <zhenyuw@linux.intel.com>

"caps.buf" is always NULL here and "caps.size" is always zero.  The code
is a no-op and can be removed.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NZhenyu Wang <zhenyuw@linux.intel.com>

As now gvt init after knowing hw resource info, we can determine vGPU
type from machine size instead of pre-defined value.
Signed-off-by: NZhenyu Wang <zhenyuw@linux.intel.com>

As now gvt init is late after MMIO initialization, use normal MMIO
read function for initial firmware exposure if no available firmware
loaded.
Signed-off-by: NZhenyu Wang <zhenyuw@linux.intel.com>

We only depend on pvinfo register for GVT-g state detection,
not require hypervisor host detect any more.
Signed-off-by: NZhenyu Wang <zhenyuw@linux.intel.com>

Prepare to remove detect_host() hook. Move intel iommu detection early
in intel_gvt_init().
Signed-off-by: NZhenyu Wang <zhenyuw@linux.intel.com>

Previously intel_gvt_init() was called very early even before
MMIO initialization which had several drawbacks:
- Have to handle MMIO access for initial MMIO state dump if golden
  state firmware is not available
- Hypervisor detection should depend on pvinfo only instead of detecting
  hypervisor status.
- Don't know hw resource size e.g aperture, ggtt size to determine
  for vGPU type, etc.

This trys to move intel_gvt_init() call late after required info
has already been initialized for GVT host.
Acked-by: NChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: NZhenyu Wang <zhenyuw@linux.intel.com>

The current virtual edid can only support the resolution up
to 1024x768. Update the virtual edid so that can support more
resoltions. With this new virtual edid, resolution can
be up to 1920x1200.

V2: add detailed modeline description in edid code comments
Signed-off-by: NChuanxiao Dong <chuanxiao.dong@intel.com>
Signed-off-by: NZhenyu Wang <zhenyuw@linux.intel.com>

Merge branch 'exynos-drm-next' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos into drm-next

adding runtime PM support to MIC driver, and including some
cleanups - especially using atomic helper functions
instead of specific ones - and fixups.

* 'exynos-drm-next' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos:
  drm/exynos: g2d: prevent integer overflow in
  drm/exynos: fix a timeout loop
  drm/exynos: use atomic helper commit
  drm/exynos: remove unnecessary codes
  drm/exynos: mic: Add runtime PM support
  drm/exynos: Stop using drm_framebuffer_unregister_private
  drm/exynos: mic: Fix parse_dt function
  drm/exynos: mic: Add mode_set callback function

Merge tag 'sunxi-drm-for-4.11' of https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux into drm-next

Allwinner DRM changes for 4.11

Just one minor fix.

* tag 'sunxi-drm-for-4.11' of https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux:
  drm/sun4i: Fix a return value in case of error

This is to address what we've discussed, moving some of the minor changes
into a drm-next request.

* 'drm-vmwgfx-next' of git://people.freedesktop.org/~syeh/repos_linux:
  drm/vmwgfx: Use kmemdup instead of kmalloc and memcpy
  drm/vmwgfx: Fix depth input into drm_mode_legacy_fb_format
  drm/vmwgfx: Fix a potential integer overflow
  drm/vmwgfx: Clear an uninitialized struct member
  drm/vmwgfx: Annotate ignored return values
  drm/vmwgfx: Clear uninitialized fields of a parameter

This is the main feature pull for radeon and amdgpu for 4.11.  Highlights:
- Power and clockgating improvements
- Preliminary SR-IOV support
- ttm buffer priority support
- ttm eviction fixes
- Removal of the ttm lru callbacks
- Remove SI DPM quirks due to MC firmware issues
- Handle VFCT with multiple vbioses
- Powerplay improvements
- Lots of driver cleanups

* 'drm-next-4.11' of git://people.freedesktop.org/~agd5f/linux: (120 commits)
  drm/amdgpu: fix amdgpu_bo_va_mapping flags
  drm/amdgpu: access stolen VRAM directly on CZ (v2)
  drm/amdgpu: access stolen VRAM directly on KV/KB (v2)
  drm/amdgpu: fix kernel panic when dpm disabled on Kv.
  drm/amdgpu: fix dpm bug on Kv.
  drm/amd/powerplay: fix regresstion issue can't set manual dpm mode.
  drm/amdgpu: handle vfct with multiple vbios images
  drm/radeon: handle vfct with multiple vbios images
  drm/amdgpu: move misc si headers into amdgpu
  drm/amdgpu: remove unused header si_reg.h
  drm/radeon: drop pitcairn dpm quirks
  drm/amdgpu: drop pitcairn dpm quirks
  drm: radeon: radeon_ttm: Handle return NULL error from ioremap_nocache
  drm/amd/amdgpu/amdgpu_ttm: Handle return NULL error from ioremap_nocache
  drm/amdgpu: add new virtual display ID
  drm/amd/amdgpu: remove the uncessary parameter for ib scheduler
  drm/amdgpu: Bring bo creation in line with radeon driver (v2)
  drm/amd/powerplay: fix misspelling in header guard
  drm/ttm: revert "add optional LRU removal callback v2"
  drm/ttm: revert "implement LRU add callbacks v2"
  ...

Another round of -misc stuff:
- Noralf debugfs cleanup cleanup (not yet everything, some more driver
  patches awaiting acks).
- More doc work.
- edid/infoframe fixes from Ville.
- misc 1-patch fixes all over, as usual

Noralf needs this for his tinydrm pull request.

* tag 'drm-misc-next-2017-01-30' of git://anongit.freedesktop.org/git/drm-misc: (48 commits)
  drm/vc4: Remove vc4_debugfs_cleanup()
  dma/fence: Export enable-signaling tracepoint for emission by drivers
  drm/tilcdc: Remove tilcdc_debugfs_cleanup()
  drm/tegra: Remove tegra_debugfs_cleanup()
  drm/sti: Remove drm_debugfs_remove_files() calls
  drm/radeon: Remove drm_debugfs_remove_files() call
  drm/omap: Remove omap_debugfs_cleanup()
  drm/hdlcd: Remove hdlcd_debugfs_cleanup()
  drm/etnaviv: Remove etnaviv_debugfs_cleanup()
  drm/etnaviv: allow build with COMPILE_TEST
  drm/amd/amdgpu: Remove drm_debugfs_remove_files() call
  drm/prime: Clarify DMA-BUF/GEM Object lifetime
  drm/ttm: Make sure BOs being swapped out are cacheable
  drm/atomic: Remove drm_atomic_debugfs_cleanup()
  drm: drm_minor_register(): Clean up debugfs on failure
  drm: debugfs: Remove all files automatically on cleanup
  drm/fourcc: add vivante tiled layout format modifiers
  drm/edid: Set YQ bits in the AVI infoframe according to CEA-861-F
  drm/edid: Set AVI infoframe Q even when QS=0
  drm/edid: Introduce drm_hdmi_avi_infoframe_quant_range()
  ...

Merge tag 'drm/atmel-hlcdc/for-4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/bbrezillon/linux into drm-next

Contains a single patch to create the fbdev at driver's registration
time instead of waiting for the connector status change.

* tag 'drm/atmel-hlcdc/for-4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/bbrezillon/linux:
  drm/atmel-hlcdc: Rework the fbdev creation logic

Merge tag 'zxdrm-4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux into drm-next

ZTE DRM driver updates for 4.11:
 - Add missing selection of VIDEOMODE_HELPERS in Kconfig, since ZTE DRM
   driver uses drm_display_mode_to_videomode().
 - Enable HDMI audio support through SPDIF interface based on generic
   hdmi-audio-codec driver.
 - Enable VOU VL (Video Layer) to support overlay plane with scaling
   function.
 - Refine zx_vou driver a bit and then add TV Encoder output device
   support.

[airlied: fixup plane format change]

* tag 'zxdrm-4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux:
  drm: zte: add tvenc driver support
  dt: add bindings for ZTE tvenc device
  drm: zte: add function to configure vou_ctrl dividers
  drm: zte: move struct vou_inf into zx_vou driver
  drm: zte: add interlace mode support
  drm: zte: add overlay plane support
  drm: zte: add .atomic_disable hook to disable graphic layer
  drm: zte: make zx_plane accessible from zx_vou driver
  drm: zte: support hdmi audio through spdif
  drm: zte: select VIDEOMODE_HELPERS in Kconfig

Updated pull request after I pulled first time :)

* 'drm-intel-next' of git://anongit.freedesktop.org/git/drm-intel:
  drm/i915: Pevent copying uninitialised garbage into vma->ggtt_view

Hope I'm not too late before the cutoff for the v4.11 with these patches.
Mostly an asorted set of fixes that we have discovered while playing with
the code and preparing for the next set of features.

* 'for-upstream/mali-dp' of git://linux-arm.org/linux-ld:
  drm: mali-dp: fix stride setting for multi-plane formats
  drm: mali-dp: Add plane offset to the plane's physical start address register
  drm: mali-dp: Check for sufficient address space
  drm: mali-dp: Check hw version matches device-tree
  drm: mali-dp: Rename malidp_input_format to malidp_pixel_format
  drm: mali-dp: fix Lx_CONTROL register fields clobber
  drm: mali-dp: Fix transposed horizontal/vertical flip
  drm: mali-dp: Fix destination size handling when rotating
  drm: mali-dp: Don't force source size == crtc size
  drm: mali-dp: Check more use cases in the plane's ->atomic_check()
  drm: malidp: Remove event_list member from struct malidp_drm
  drm/arm/malidp: Fix possible dereference of NULL

The size computations done in the ioctl function use an integer.
If userspace submits a request with req->cmd_nr or req->cmd_buf_nr
set to INT_MAX, the integer computations overflow later, leading
to potential (kernel) memory corruption.

Prevent this issue by enforcing a limit on the number of submitted
commands, so that we have enough headroom later for the size
computations.

Note that this change has no impact on the currently available
users in userspace, like e.g. libdrm/exynos.

While at it, also make a comment about the size computation more
detailed.
Signed-off-by: NJoonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: NTobias Jakobi <tjakobi@math.uni-bielefeld.de>
Signed-off-by: NInki Dae <inki.dae@samsung.com>

We were trying to print an error message if we timed out here, but the
loop actually ends with "tries" set to UINT_MAX and not zero.  Fix this
by changing from tries-- to --tries.

A for loop would actually be the most natural way to do this.  My fix
means we only loop 99 times instead of 100 but that's probably ok.

Fixes: a696394c ('drm/exynos: mixer: simplify loop in vp_win_reset()')
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: NTobias Jakobi <tjakobi@math.uni-bielefeld.de>
Signed-off-by: NInki Dae <inki.dae@samsung.com>

This patch replaces specific atomic commit function
with atomic helper commit one.

For this, it removes existing atomic commit function
and relevant code specific to Exynos DRM and makes
atomic helper commit to be used instead.

Below are changes for the use of atomic helper commit:
- add atomic_commit_tail callback specific to Exynos DRM
  . default implemention of atomic helper doesn't mesh well
    with runtime PM so the device driver which supports runtime
    PM should call drm_atomic_helper_commit_modeset_enables function
    prior to drm_atomic_helper_commit_planes function call.
    atomic_commit_tail callback implements this call ordering.
- allow plane commit only in case that CRTC device is enabled.
  . for this, it calls atomic_helper_commit_planes function
    with DRM_PLANE_COMMIT_ACTIVE_ONLY flag in atomic_commit_tail callback.
Signed-off-by: NInki Dae <inki.dae@samsung.com>
Reviewed-by: NGustavo Padovan <gustavo.padovan@collabora.com>

This patch removes exynos_drm_crtc_cancel_page_flip call
when drm is closed because at that time, events will be released
by drm_events_release function.

Changelog v1:
- remove exynos_drm_crtc_cancel_page_flip function also because
  this funtion isn't used anymore.
Signed-off-by: NInki Dae <inki.dae@samsung.com>
Reviewed-by: NAndrzej Hajda <a.hajda@samsung.com>

This patch adds runtime support calls to notify device core when MIC
device is really in use. Runtime PM is implemented by enabling and
disabling clocks like in other Exynos DRM subdrivers. Adding runtime
PM support is needed to let power domain with this device to be turned
off when display is not used.
Signed-off-by: NMarek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: NInki Dae <inki.dae@samsung.com>

This is the deprecated function for when you embedded the framebuffer
somewhere else (which breaks refcounting). But exynos is using
drm_framebuffer_remove and a free-standing fb, so this is rendundant.
Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com>
Signed-off-by: NInki Dae <inki.dae@samsung.com>