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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/gpu/drm/i915/i915_ioctl.c | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_ioctl.c')
-rw-r--r-- | drivers/gpu/drm/i915/i915_ioctl.c | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_ioctl.c b/drivers/gpu/drm/i915/i915_ioctl.c new file mode 100644 index 0000000000..06a10ccea8 --- /dev/null +++ b/drivers/gpu/drm/i915/i915_ioctl.c @@ -0,0 +1,94 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright © 2022 Intel Corporation + */ + +#include "gt/intel_engine_regs.h" + +#include "i915_drv.h" +#include "i915_gem.h" +#include "i915_ioctl.h" +#include "i915_reg.h" +#include "intel_runtime_pm.h" +#include "intel_uncore.h" + +/* + * This file is for small ioctl functions that are out of place everywhere else, + * and not big enough to warrant a file of their own. + * + * This is not the dumping ground for random ioctls. + */ + +struct reg_whitelist { + i915_reg_t offset_ldw; + i915_reg_t offset_udw; + u8 min_graphics_ver; + u8 max_graphics_ver; + u8 size; +}; + +static const struct reg_whitelist reg_read_whitelist[] = { + { + .offset_ldw = RING_TIMESTAMP(RENDER_RING_BASE), + .offset_udw = RING_TIMESTAMP_UDW(RENDER_RING_BASE), + .min_graphics_ver = 4, + .max_graphics_ver = 12, + .size = 8 + } +}; + +int i915_reg_read_ioctl(struct drm_device *dev, + void *data, struct drm_file *unused) +{ + struct drm_i915_private *i915 = to_i915(dev); + struct intel_uncore *uncore = &i915->uncore; + struct drm_i915_reg_read *reg = data; + struct reg_whitelist const *entry; + intel_wakeref_t wakeref; + unsigned int flags; + int remain; + int ret = 0; + + entry = reg_read_whitelist; + remain = ARRAY_SIZE(reg_read_whitelist); + while (remain) { + u32 entry_offset = i915_mmio_reg_offset(entry->offset_ldw); + + GEM_BUG_ON(!is_power_of_2(entry->size)); + GEM_BUG_ON(entry->size > 8); + GEM_BUG_ON(entry_offset & (entry->size - 1)); + + if (IS_GRAPHICS_VER(i915, entry->min_graphics_ver, entry->max_graphics_ver) && + entry_offset == (reg->offset & -entry->size)) + break; + entry++; + remain--; + } + + if (!remain) + return -EINVAL; + + flags = reg->offset & (entry->size - 1); + + with_intel_runtime_pm(&i915->runtime_pm, wakeref) { + if (entry->size == 8 && flags == I915_REG_READ_8B_WA) + reg->val = intel_uncore_read64_2x32(uncore, + entry->offset_ldw, + entry->offset_udw); + else if (entry->size == 8 && flags == 0) + reg->val = intel_uncore_read64(uncore, + entry->offset_ldw); + else if (entry->size == 4 && flags == 0) + reg->val = intel_uncore_read(uncore, entry->offset_ldw); + else if (entry->size == 2 && flags == 0) + reg->val = intel_uncore_read16(uncore, + entry->offset_ldw); + else if (entry->size == 1 && flags == 0) + reg->val = intel_uncore_read8(uncore, + entry->offset_ldw); + else + ret = -EINVAL; + } + + return ret; +} |