On Sun, Feb 12, 2023 at 02:25:47PM -0500, Thomas Frohwein wrote:
> On Tue, Feb 07, 2023 at 08:51:40PM +1100, Jonathan Gray wrote:
>
> [...]
> > > ...
> > > i915_resize_lmem_bar: stub
> > > panic: kernel diagnostic assertion "pdev->pci->sc_bridgetag == NULL"
> > > failed: file "/usr/src/sys/dev/pci/drm/drm_linux.c", line 1277
> > > ...
> >
> > The vga arbiter bits need to change. There isn't an easy way to get
> > a softc to avoid having state shared by multiple inteldrm instances.
> >
> > perhaps they can be skipped for the moment?
>
> Thanks, this leads to a uvm_fault now:
>
> xehp_load_dss_mask: stub
> xehp_load_dss_mask: stub
> intel_slicemask_from_xehp_dssmask: stub
> intel_slicemask_from_xehp_dssmask: stub
> i915_resize_lmem_bar: stub
> uvm_fault(0xffffffff825181f8, 0x10, 0, 1) -> e
>
> screen photo at https://thfr.info/tmp/DG2-error-20230212.jpg
unfortunately, that isn't much help
If you boot -d and do:
w db_panic 0
c
you should be able to get a backtrace.
>
> >
> > Index: sys/dev/pci/drm/drm_linux.c
> > ===================================================================
> > RCS file: /cvs/src/sys/dev/pci/drm/drm_linux.c,v
> > retrieving revision 1.95
> > diff -u -p -r1.95 drm_linux.c
> > --- sys/dev/pci/drm/drm_linux.c 1 Jan 2023 01:34:34 -0000 1.95
> > +++ sys/dev/pci/drm/drm_linux.c 7 Feb 2023 09:31:55 -0000
> > @@ -1274,7 +1274,8 @@ vga_disable_bridge(struct pci_attach_arg
> > void
> > vga_get_uninterruptible(struct pci_dev *pdev, int rsrc)
> > {
> > - KASSERT(pdev->pci->sc_bridgetag == NULL);
> > + if (pdev->pci->sc_bridgetag != NULL)
> > + return;
> > pci_enumerate_bus(pdev->pci, vga_disable_bridge, NULL);
> > }
> >
> > @@ -1282,6 +1283,9 @@ void
> > vga_put(struct pci_dev *pdev, int rsrc)
> > {
> > pcireg_t bc;
> > +
> > + if (pdev->pci->sc_bridgetag != NULL)
> > + return;
> >
> > if (!vga_bridge_disabled)
> > return;
> > Index: sys/dev/pci/drm/i915/i915_pci.c
> > ===================================================================
> > RCS file: /cvs/src/sys/dev/pci/drm/i915/i915_pci.c,v
> > retrieving revision 1.15
> > diff -u -p -r1.15 i915_pci.c
> > --- sys/dev/pci/drm/i915/i915_pci.c 25 Jan 2023 01:51:59 -0000 1.15
> > +++ sys/dev/pci/drm/i915/i915_pci.c 3 Feb 2023 01:43:02 -0000
> > @@ -1078,7 +1078,6 @@ static const struct intel_device_info dg
> > XE_LPD_FEATURES,
> > .__runtime.cpu_transcoder_mask = BIT(TRANSCODER_A) | BIT(TRANSCODER_B) |
> > BIT(TRANSCODER_C) | BIT(TRANSCODER_D),
> > - .require_force_probe = 1,
> > };
> >
> > static const struct intel_device_info ats_m_info = {
> > Index: sys/dev/pci/drm/i915/intel_memory_region.h
> > ===================================================================
> > RCS file: /cvs/src/sys/dev/pci/drm/i915/intel_memory_region.h,v
> > retrieving revision 1.3
> > diff -u -p -r1.3 intel_memory_region.h
> > --- sys/dev/pci/drm/i915/intel_memory_region.h 1 Jan 2023 01:34:55
> > -0000 1.3
> > +++ sys/dev/pci/drm/i915/intel_memory_region.h 4 Feb 2023 00:59:23
> > -0000
> > @@ -70,8 +70,13 @@ struct intel_memory_region {
> >
> > const struct intel_memory_region_ops *ops;
> >
> > -#ifdef notyet
> > +#ifdef __linux__
> > struct io_mapping iomap;
> > +#else
> > + struct vm_page *pgs;
> > + struct agp_map *agph;
> > + bus_space_handle_t bsh;
> > + bus_space_tag_t bst;
> > #endif
> > struct resource region;
> >
> > Index: sys/dev/pci/drm/i915/gem/i915_gem_lmem.c
> > ===================================================================
> > RCS file: /cvs/src/sys/dev/pci/drm/i915/gem/i915_gem_lmem.c,v
> > retrieving revision 1.4
> > diff -u -p -r1.4 i915_gem_lmem.c
> > --- sys/dev/pci/drm/i915/gem/i915_gem_lmem.c 1 Jan 2023 01:34:56
> > -0000 1.4
> > +++ sys/dev/pci/drm/i915/gem/i915_gem_lmem.c 4 Feb 2023 00:58:16
> > -0000
> > @@ -15,9 +15,6 @@ i915_gem_object_lmem_io_map(struct drm_i
> > unsigned long n,
> > unsigned long size)
> > {
> > - STUB();
> > - return NULL;
> > -#ifdef notyet
> > resource_size_t offset;
> >
> > GEM_BUG_ON(!i915_gem_object_is_contiguous(obj));
> > @@ -25,7 +22,11 @@ i915_gem_object_lmem_io_map(struct drm_i
> > offset = i915_gem_object_get_dma_address(obj, n);
> > offset -= obj->mm.region->region.start;
> >
> > +#ifdef __linux__
> > return io_mapping_map_wc(&obj->mm.region->iomap, offset, size);
> > +#else
> > + agp_map_atomic(obj->mm.region->agph, offset, &obj->mm.region->bsh);
> > + return bus_space_vaddr(obj->mm.region->bst, obj->mm.region->bsh);
> > #endif
> > }
> >
> > Index: sys/dev/pci/drm/i915/gem/i915_gem_stolen.c
> > ===================================================================
> > RCS file: /cvs/src/sys/dev/pci/drm/i915/gem/i915_gem_stolen.c,v
> > retrieving revision 1.5
> > diff -u -p -r1.5 i915_gem_stolen.c
> > --- sys/dev/pci/drm/i915/gem/i915_gem_stolen.c 4 Feb 2023 00:07:11
> > -0000 1.5
> > +++ sys/dev/pci/drm/i915/gem/i915_gem_stolen.c 4 Feb 2023 01:23:34
> > -0000
> > @@ -774,18 +774,44 @@ static int init_stolen_lmem(struct intel
> > if (err)
> > return err;
> >
> > - STUB();
> > - return -ENOSYS;
> > -#ifdef notyet
> > +#ifdef __linux__
> > if (mem->io_size && !io_mapping_init_wc(&mem->iomap,
> > mem->io_start,
> > mem->io_size)) {
> > err = -EIO;
> > goto err_cleanup;
> > }
> > +#else
> > + if (mem->io_size) {
> > + int i;
> > +
> > + uvm_page_physload(atop(mem->io_start),
> > + atop(mem->io_start + mem->io_size),
> > + atop(mem->io_start),
> > + atop(mem->io_start + mem->io_size),
> > + PHYSLOAD_DEVICE);
> > + /* array of vm pages that physload introduced. */
> > + mem->pgs = PHYS_TO_VM_PAGE(mem->io_start);
> > + KASSERT(mem->pgs != NULL);
> > + /*
> > + * XXX mark all pages write combining so user mmaps get the
> > + * right bits. We really need a proper MI api for doing this,
> > + * but for now this allows us to use PAT where available.
> > + */
> > + for (i = 0; i < atop(mem->io_size); i++)
> > + atomic_setbits_int(&(mem->pgs[i].pg_flags),
> > + PG_PMAP_WC);
> > + if (agp_init_map(mem->bst, mem->io_start,
> > + mem->io_size,
> > + BUS_SPACE_MAP_LINEAR | BUS_SPACE_MAP_PREFETCHABLE,
> > + &mem->agph))
> > + panic("can't map lmem");
> > + }
> > +#endif
> >
> > return 0;
> >
> > +#ifdef __linux__
> > err_cleanup:
> > i915_gem_cleanup_stolen(mem->i915);
> > return err;
> > Index: sys/dev/pci/drm/i915/gt/intel_region_lmem.c
> > ===================================================================
> > RCS file: /cvs/src/sys/dev/pci/drm/i915/gt/intel_region_lmem.c,v
> > retrieving revision 1.2
> > diff -u -p -r1.2 intel_region_lmem.c
> > --- sys/dev/pci/drm/i915/gt/intel_region_lmem.c 1 Jan 2023 01:34:57
> > -0000 1.2
> > +++ sys/dev/pci/drm/i915/gt/intel_region_lmem.c 4 Feb 2023 01:31:29
> > -0000
> > @@ -142,15 +142,37 @@ region_lmem_release(struct intel_memory_
> > static int
> > region_lmem_init(struct intel_memory_region *mem)
> > {
> > - STUB();
> > - return -ENOSYS;
> > -#ifdef notyet
> > int ret;
> >
> > +#ifdef __linux__
> > if (!io_mapping_init_wc(&mem->iomap,
> > mem->io_start,
> > mem->io_size))
> > return -EIO;
> > +#else
> > + int i;
> > + uvm_page_physload(atop(mem->io_start),
> > + atop(mem->io_start + mem->io_size),
> > + atop(mem->io_start),
> > + atop(mem->io_start + mem->io_size),
> > + PHYSLOAD_DEVICE);
> > + /* array of vm pages that physload introduced. */
> > + mem->pgs = PHYS_TO_VM_PAGE(mem->io_start);
> > + KASSERT(mem->pgs != NULL);
> > + /*
> > + * XXX mark all pages write combining so user mmaps get the
> > + * right bits. We really need a proper MI api for doing this,
> > + * but for now this allows us to use PAT where available.
> > + */
> > + for (i = 0; i < atop(mem->io_size); i++)
> > + atomic_setbits_int(&(mem->pgs[i].pg_flags),
> > + PG_PMAP_WC);
> > + if (agp_init_map(mem->i915->bst, mem->io_start,
> > + mem->io_size,
> > + BUS_SPACE_MAP_LINEAR | BUS_SPACE_MAP_PREFETCHABLE,
> > + &mem->agph))
> > + panic("can't init lmem");
> > +#endif
> >
> > ret = intel_region_ttm_init(mem);
> > if (ret)
> > @@ -159,10 +181,13 @@ region_lmem_init(struct intel_memory_reg
> > return 0;
> >
> > out_no_buddy:
> > +#ifdef __linux__
> > io_mapping_fini(&mem->iomap);
> > +#else
> > + agp_destroy_map(mem->agph);
> > +#endif
> >
> > return ret;
> > -#endif
> > }
> >
> > static const struct intel_memory_region_ops intel_region_lmem_ops = {
>
>
