amdgpu_acpi...ocation_size(9)

💅 amdgpu_acpi_set_uma_allocation_size — a Kernel API Manual moment ✨

okay bestie, so we're in the Kernel API Manual today and the page is amdgpu_acpi...ocation_size(9) — yes the title is literally abbreviated with an ellipsis, that's just how the man page renders it, don't come for me 🎀

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🌸 NAME 🌸

amdgpu_acpi_set_uma_allocation_size — set the Unified Memory Architecture allocation size, and we're doing it via ACPI 💫

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✨ SYNOPSIS ✨

int amdgpu_acpi_set_uma_allocation_size (struct amdgpu_device *adev , u8
index , u8 type );

that's the whole signature, bestie — returns an int, takes three args 🫶

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🦋 ARGUMENTS 🦋

• adev — a pointer to the amdgpu_device structure. like, the device in question, the main character of this function call 👑
• index — the index that specifies the UMA allocation. which one? this one, babes 💅
• type — the type of UMA allocation. the vibe of the allocation, if you will 🌈

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🧚 DESCRIPTION 🧚

so what does it actually DO — this function configures the UMA allocation size for the specified device using ACPI methods. no cap, that's the whole thing ✨

the allocation is determined by the provided index and type — so those two args are doing the heavy lifting, respect them 😌

and the returns? returns 0 on success, or a negative error code on failure. so like, 0 = slay, negative = something went sideways, check your error handling fr fr 💀

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🔥 SEE ALSO 🔥

the kernel file lives at ./drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c — go read it, it's giving source-of-truth 💖

and here's the whole friend group, all of them, in order, not skipping a single one 🫡

• amdgpu_atif_call(9)
• amdgpu_atif_parse_notification(9)
• amdgpu_atif_parse_functions(9)
• amdgpu_atif_verify_interface(9)
• amdgpu_atif_get_notification_params(9)
• amdgpu_atif_query_backlight_caps(9)
• amdgpu_atif_get_sbios_requests(9)
• amdgpu_atif_handler(9)
• amdgpu_atcs_call(9)
• amdgpu_atcs_parse_functions(9)
• amdgpu_atcs_verify_interface(9)
• amdgpu_acpi_is_pcie_performance_request_supported(9)
• amdgpu_acpi_is_power_shift_control_supported(9)
• amdgpu_acpi_pcie_notify_device_ready(9)
• amdgpu_acpi_pcie_performance_request(9)
• amdgpu_acpi_power_shift_control(9)
• amdgpu_acpi_smart_shift_update(9)
• amdgpu_acpi_get_node_id(9)
• amdgpu_acpi_event(9)
• amdgpu_acpi_init(9)
• amdgpu_acpi_fini(9)
• amdgpu_atif_pci_probe_handle(9)
• amdgpu_atcs_pci_probe_handle(9)
• amdgpu_acpi_should_gpu_reset(9)
• amdgpu_acpi_is_s3_active(9)
• amdgpu_acpi_is_s0ix_active(9)

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ngl this one is a short page but it ate anyway — small, focused, does exactly one thing 💅

okay that's the whole read, and now the cute sign-off: this little number comes from the source tree at ./drivers/gpu/drm/amd/amdgpu, dated October 2026, and it's filed under amdgpu_acpi...ocation_size(9) — mwah, go configure some UMA allocation sizes bestie 🎀💜