diff options
Diffstat (limited to 'drivers/gpu/drm/i915/gvt/cfg_space.c')
| -rw-r--r-- | drivers/gpu/drm/i915/gvt/cfg_space.c | 89 |
1 files changed, 17 insertions, 72 deletions
diff --git a/drivers/gpu/drm/i915/gvt/cfg_space.c b/drivers/gpu/drm/i915/gvt/cfg_space.c index b490e3db2e38..dad3a6054335 100644 --- a/drivers/gpu/drm/i915/gvt/cfg_space.c +++ b/drivers/gpu/drm/i915/gvt/cfg_space.c @@ -129,60 +129,16 @@ int intel_vgpu_emulate_cfg_read(struct intel_vgpu *vgpu, unsigned int offset, return 0; } -static int map_aperture(struct intel_vgpu *vgpu, bool map) +static void map_aperture(struct intel_vgpu *vgpu, bool map) { - phys_addr_t aperture_pa = vgpu_aperture_pa_base(vgpu); - unsigned long aperture_sz = vgpu_aperture_sz(vgpu); - u64 first_gfn; - u64 val; - int ret; - - if (map == vgpu->cfg_space.bar[INTEL_GVT_PCI_BAR_APERTURE].tracked) - return 0; - - val = vgpu_cfg_space(vgpu)[PCI_BASE_ADDRESS_2]; - if (val & PCI_BASE_ADDRESS_MEM_TYPE_64) - val = *(u64 *)(vgpu_cfg_space(vgpu) + PCI_BASE_ADDRESS_2); - else - val = *(u32 *)(vgpu_cfg_space(vgpu) + PCI_BASE_ADDRESS_2); - - first_gfn = (val + vgpu_aperture_offset(vgpu)) >> PAGE_SHIFT; - - ret = intel_gvt_hypervisor_map_gfn_to_mfn(vgpu, first_gfn, - aperture_pa >> PAGE_SHIFT, - aperture_sz >> PAGE_SHIFT, - map); - if (ret) - return ret; - - vgpu->cfg_space.bar[INTEL_GVT_PCI_BAR_APERTURE].tracked = map; - return 0; + if (map != vgpu->cfg_space.bar[INTEL_GVT_PCI_BAR_APERTURE].tracked) + vgpu->cfg_space.bar[INTEL_GVT_PCI_BAR_APERTURE].tracked = map; } -static int trap_gttmmio(struct intel_vgpu *vgpu, bool trap) +static void trap_gttmmio(struct intel_vgpu *vgpu, bool trap) { - u64 start, end; - u64 val; - int ret; - - if (trap == vgpu->cfg_space.bar[INTEL_GVT_PCI_BAR_GTTMMIO].tracked) - return 0; - - val = vgpu_cfg_space(vgpu)[PCI_BASE_ADDRESS_0]; - if (val & PCI_BASE_ADDRESS_MEM_TYPE_64) - start = *(u64 *)(vgpu_cfg_space(vgpu) + PCI_BASE_ADDRESS_0); - else - start = *(u32 *)(vgpu_cfg_space(vgpu) + PCI_BASE_ADDRESS_0); - - start &= ~GENMASK(3, 0); - end = start + vgpu->cfg_space.bar[INTEL_GVT_PCI_BAR_GTTMMIO].size - 1; - - ret = intel_gvt_hypervisor_set_trap_area(vgpu, start, end, trap); - if (ret) - return ret; - - vgpu->cfg_space.bar[INTEL_GVT_PCI_BAR_GTTMMIO].tracked = trap; - return 0; + if (trap != vgpu->cfg_space.bar[INTEL_GVT_PCI_BAR_GTTMMIO].tracked) + vgpu->cfg_space.bar[INTEL_GVT_PCI_BAR_GTTMMIO].tracked = trap; } static int emulate_pci_command_write(struct intel_vgpu *vgpu, @@ -191,26 +147,17 @@ static int emulate_pci_command_write(struct intel_vgpu *vgpu, u8 old = vgpu_cfg_space(vgpu)[offset]; u8 new = *(u8 *)p_data; u8 changed = old ^ new; - int ret; vgpu_pci_cfg_mem_write(vgpu, offset, p_data, bytes); if (!(changed & PCI_COMMAND_MEMORY)) return 0; if (old & PCI_COMMAND_MEMORY) { - ret = trap_gttmmio(vgpu, false); - if (ret) - return ret; - ret = map_aperture(vgpu, false); - if (ret) - return ret; + trap_gttmmio(vgpu, false); + map_aperture(vgpu, false); } else { - ret = trap_gttmmio(vgpu, true); - if (ret) - return ret; - ret = map_aperture(vgpu, true); - if (ret) - return ret; + trap_gttmmio(vgpu, true); + map_aperture(vgpu, true); } return 0; @@ -230,13 +177,12 @@ static int emulate_pci_rom_bar_write(struct intel_vgpu *vgpu, return 0; } -static int emulate_pci_bar_write(struct intel_vgpu *vgpu, unsigned int offset, +static void emulate_pci_bar_write(struct intel_vgpu *vgpu, unsigned int offset, void *p_data, unsigned int bytes) { u32 new = *(u32 *)(p_data); bool lo = IS_ALIGNED(offset, 8); u64 size; - int ret = 0; bool mmio_enabled = vgpu_cfg_space(vgpu)[PCI_COMMAND] & PCI_COMMAND_MEMORY; struct intel_vgpu_pci_bar *bars = vgpu->cfg_space.bar; @@ -259,14 +205,14 @@ static int emulate_pci_bar_write(struct intel_vgpu *vgpu, unsigned int offset, * Untrap the BAR, since guest hasn't configured a * valid GPA */ - ret = trap_gttmmio(vgpu, false); + trap_gttmmio(vgpu, false); break; case PCI_BASE_ADDRESS_2: case PCI_BASE_ADDRESS_3: size = ~(bars[INTEL_GVT_PCI_BAR_APERTURE].size -1); intel_vgpu_write_pci_bar(vgpu, offset, size >> (lo ? 0 : 32), lo); - ret = map_aperture(vgpu, false); + map_aperture(vgpu, false); break; default: /* Unimplemented BARs */ @@ -282,19 +228,18 @@ static int emulate_pci_bar_write(struct intel_vgpu *vgpu, unsigned int offset, */ trap_gttmmio(vgpu, false); intel_vgpu_write_pci_bar(vgpu, offset, new, lo); - ret = trap_gttmmio(vgpu, mmio_enabled); + trap_gttmmio(vgpu, mmio_enabled); break; case PCI_BASE_ADDRESS_2: case PCI_BASE_ADDRESS_3: map_aperture(vgpu, false); intel_vgpu_write_pci_bar(vgpu, offset, new, lo); - ret = map_aperture(vgpu, mmio_enabled); + map_aperture(vgpu, mmio_enabled); break; default: intel_vgpu_write_pci_bar(vgpu, offset, new, lo); } } - return ret; } /** @@ -336,8 +281,8 @@ int intel_vgpu_emulate_cfg_write(struct intel_vgpu *vgpu, unsigned int offset, case PCI_BASE_ADDRESS_0 ... PCI_BASE_ADDRESS_5: if (drm_WARN_ON(&i915->drm, !IS_ALIGNED(offset, 4))) return -EINVAL; - return emulate_pci_bar_write(vgpu, offset, p_data, bytes); - + emulate_pci_bar_write(vgpu, offset, p_data, bytes); + break; case INTEL_GVT_PCI_SWSCI: if (drm_WARN_ON(&i915->drm, !IS_ALIGNED(offset, 4))) return -EINVAL; |