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Merge pull request #815 from mediest/feat/expose-ggml-kv-types
Add KV cache type (K/V) configuration to LlamaContextParams
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‎llama-cpp-2/src/context/params.rs‎

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@@ -88,6 +88,130 @@ impl From<LlamaPoolingType> for i32 {
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}
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}
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/// A rusty wrapper around `ggml_type` for KV cache types.
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#[allow(non_camel_case_types, missing_docs)]
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#[derive(Copy, Clone, Debug, PartialEq, Eq)]
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pub enum KvCacheType {
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/// Represents an unknown or not-yet-mapped `ggml_type` and carries the raw value.
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/// When passed through FFI, the raw value is used as-is (if llama.cpp supports it,
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/// the runtime will operate with that type).
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/// This variant preserves API compatibility when new `ggml_type` values are
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/// introduced in the future.
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Unknown(llama_cpp_sys_2::ggml_type),
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F32,
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F16,
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Q4_0,
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Q4_1,
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Q5_0,
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Q5_1,
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Q8_0,
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Q8_1,
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Q2_K,
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Q3_K,
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Q4_K,
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Q5_K,
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Q6_K,
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Q8_K,
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IQ2_XXS,
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IQ2_XS,
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IQ3_XXS,
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IQ1_S,
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IQ4_NL,
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IQ3_S,
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IQ2_S,
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IQ4_XS,
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I8,
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I16,
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I32,
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I64,
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F64,
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IQ1_M,
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BF16,
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TQ1_0,
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TQ2_0,
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MXFP4,
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}
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impl From<KvCacheType> for llama_cpp_sys_2::ggml_type {
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fn from(value: KvCacheType) -> Self {
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match value {
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KvCacheType::Unknown(raw) => raw,
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KvCacheType::F32 => llama_cpp_sys_2::GGML_TYPE_F32,
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KvCacheType::F16 => llama_cpp_sys_2::GGML_TYPE_F16,
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KvCacheType::Q4_0 => llama_cpp_sys_2::GGML_TYPE_Q4_0,
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KvCacheType::Q4_1 => llama_cpp_sys_2::GGML_TYPE_Q4_1,
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KvCacheType::Q5_0 => llama_cpp_sys_2::GGML_TYPE_Q5_0,
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KvCacheType::Q5_1 => llama_cpp_sys_2::GGML_TYPE_Q5_1,
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KvCacheType::Q8_0 => llama_cpp_sys_2::GGML_TYPE_Q8_0,
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KvCacheType::Q8_1 => llama_cpp_sys_2::GGML_TYPE_Q8_1,
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KvCacheType::Q2_K => llama_cpp_sys_2::GGML_TYPE_Q2_K,
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KvCacheType::Q3_K => llama_cpp_sys_2::GGML_TYPE_Q3_K,
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KvCacheType::Q4_K => llama_cpp_sys_2::GGML_TYPE_Q4_K,
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KvCacheType::Q5_K => llama_cpp_sys_2::GGML_TYPE_Q5_K,
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KvCacheType::Q6_K => llama_cpp_sys_2::GGML_TYPE_Q6_K,
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KvCacheType::Q8_K => llama_cpp_sys_2::GGML_TYPE_Q8_K,
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KvCacheType::IQ2_XXS => llama_cpp_sys_2::GGML_TYPE_IQ2_XXS,
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KvCacheType::IQ2_XS => llama_cpp_sys_2::GGML_TYPE_IQ2_XS,
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KvCacheType::IQ3_XXS => llama_cpp_sys_2::GGML_TYPE_IQ3_XXS,
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KvCacheType::IQ1_S => llama_cpp_sys_2::GGML_TYPE_IQ1_S,
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KvCacheType::IQ4_NL => llama_cpp_sys_2::GGML_TYPE_IQ4_NL,
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KvCacheType::IQ3_S => llama_cpp_sys_2::GGML_TYPE_IQ3_S,
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KvCacheType::IQ2_S => llama_cpp_sys_2::GGML_TYPE_IQ2_S,
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KvCacheType::IQ4_XS => llama_cpp_sys_2::GGML_TYPE_IQ4_XS,
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KvCacheType::I8 => llama_cpp_sys_2::GGML_TYPE_I8,
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KvCacheType::I16 => llama_cpp_sys_2::GGML_TYPE_I16,
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KvCacheType::I32 => llama_cpp_sys_2::GGML_TYPE_I32,
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KvCacheType::I64 => llama_cpp_sys_2::GGML_TYPE_I64,
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KvCacheType::F64 => llama_cpp_sys_2::GGML_TYPE_F64,
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KvCacheType::IQ1_M => llama_cpp_sys_2::GGML_TYPE_IQ1_M,
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KvCacheType::BF16 => llama_cpp_sys_2::GGML_TYPE_BF16,
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KvCacheType::TQ1_0 => llama_cpp_sys_2::GGML_TYPE_TQ1_0,
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KvCacheType::TQ2_0 => llama_cpp_sys_2::GGML_TYPE_TQ2_0,
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KvCacheType::MXFP4 => llama_cpp_sys_2::GGML_TYPE_MXFP4,
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}
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}
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}
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impl From<llama_cpp_sys_2::ggml_type> for KvCacheType {
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fn from(value: llama_cpp_sys_2::ggml_type) -> Self {
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match value {
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x if x == llama_cpp_sys_2::GGML_TYPE_F32 => KvCacheType::F32,
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x if x == llama_cpp_sys_2::GGML_TYPE_F16 => KvCacheType::F16,
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x if x == llama_cpp_sys_2::GGML_TYPE_Q4_0 => KvCacheType::Q4_0,
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x if x == llama_cpp_sys_2::GGML_TYPE_Q4_1 => KvCacheType::Q4_1,
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x if x == llama_cpp_sys_2::GGML_TYPE_Q5_0 => KvCacheType::Q5_0,
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x if x == llama_cpp_sys_2::GGML_TYPE_Q5_1 => KvCacheType::Q5_1,
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x if x == llama_cpp_sys_2::GGML_TYPE_Q8_0 => KvCacheType::Q8_0,
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x if x == llama_cpp_sys_2::GGML_TYPE_Q8_1 => KvCacheType::Q8_1,
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x if x == llama_cpp_sys_2::GGML_TYPE_Q2_K => KvCacheType::Q2_K,
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x if x == llama_cpp_sys_2::GGML_TYPE_Q3_K => KvCacheType::Q3_K,
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x if x == llama_cpp_sys_2::GGML_TYPE_Q4_K => KvCacheType::Q4_K,
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x if x == llama_cpp_sys_2::GGML_TYPE_Q5_K => KvCacheType::Q5_K,
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x if x == llama_cpp_sys_2::GGML_TYPE_Q6_K => KvCacheType::Q6_K,
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x if x == llama_cpp_sys_2::GGML_TYPE_Q8_K => KvCacheType::Q8_K,
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x if x == llama_cpp_sys_2::GGML_TYPE_IQ2_XXS => KvCacheType::IQ2_XXS,
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x if x == llama_cpp_sys_2::GGML_TYPE_IQ2_XS => KvCacheType::IQ2_XS,
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x if x == llama_cpp_sys_2::GGML_TYPE_IQ3_XXS => KvCacheType::IQ3_XXS,
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x if x == llama_cpp_sys_2::GGML_TYPE_IQ1_S => KvCacheType::IQ1_S,
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x if x == llama_cpp_sys_2::GGML_TYPE_IQ4_NL => KvCacheType::IQ4_NL,
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x if x == llama_cpp_sys_2::GGML_TYPE_IQ3_S => KvCacheType::IQ3_S,
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x if x == llama_cpp_sys_2::GGML_TYPE_IQ2_S => KvCacheType::IQ2_S,
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x if x == llama_cpp_sys_2::GGML_TYPE_IQ4_XS => KvCacheType::IQ4_XS,
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x if x == llama_cpp_sys_2::GGML_TYPE_I8 => KvCacheType::I8,
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x if x == llama_cpp_sys_2::GGML_TYPE_I16 => KvCacheType::I16,
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x if x == llama_cpp_sys_2::GGML_TYPE_I32 => KvCacheType::I32,
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x if x == llama_cpp_sys_2::GGML_TYPE_I64 => KvCacheType::I64,
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x if x == llama_cpp_sys_2::GGML_TYPE_F64 => KvCacheType::F64,
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x if x == llama_cpp_sys_2::GGML_TYPE_IQ1_M => KvCacheType::IQ1_M,
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x if x == llama_cpp_sys_2::GGML_TYPE_BF16 => KvCacheType::BF16,
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x if x == llama_cpp_sys_2::GGML_TYPE_TQ1_0 => KvCacheType::TQ1_0,
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x if x == llama_cpp_sys_2::GGML_TYPE_TQ2_0 => KvCacheType::TQ2_0,
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x if x == llama_cpp_sys_2::GGML_TYPE_MXFP4 => KvCacheType::MXFP4,
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_ => KvCacheType::Unknown(value),
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}
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}
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}
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/// A safe wrapper around `llama_context_params`.
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///
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/// Generally this should be created with [`Default::default()`] and then modified with `with_*` methods.
@@ -574,6 +698,57 @@ impl LlamaContextParams {
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pub fn n_seq_max(&self) -> u32 {
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self.context_params.n_seq_max
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}
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/// Set the KV cache data type for K
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/// use llama_cpp_2::context::params::{LlamaContextParams, KvCacheType};
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/// let params = LlamaContextParams::default().with_type_k(KvCacheType::Q4_0);
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/// assert_eq!(params.type_k(), KvCacheType::Q4_0);
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/// ```
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#[must_use]
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pub fn with_type_k(mut self, type_k: KvCacheType) -> Self {
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self.context_params.type_k = type_k.into();
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self
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}
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/// Get the KV cache data type for K
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///
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/// # Examples
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///
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/// ```rust
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/// let params = llama_cpp_2::context::params::LlamaContextParams::default();
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/// let _ = params.type_k();
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/// ```
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#[must_use]
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pub fn type_k(&self) -> KvCacheType {
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KvCacheType::from(self.context_params.type_k)
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}
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/// Set the KV cache data type for V
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///
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/// # Examples
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///
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/// ```rust
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/// use llama_cpp_2::context::params::{LlamaContextParams, KvCacheType};
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/// let params = LlamaContextParams::default().with_type_v(KvCacheType::Q4_1);
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/// assert_eq!(params.type_v(), KvCacheType::Q4_1);
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/// ```
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#[must_use]
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pub fn with_type_v(mut self, type_v: KvCacheType) -> Self {
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self.context_params.type_v = type_v.into();
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self
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}
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/// Get the KV cache data type for V
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///
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/// # Examples
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///
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/// ```rust
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/// let params = llama_cpp_2::context::params::LlamaContextParams::default();
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/// let _ = params.type_v();
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/// ```
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#[must_use]
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pub fn type_v(&self) -> KvCacheType {
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KvCacheType::from(self.context_params.type_v)
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}
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}
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/// Default parameters for `LlamaContext`. (as defined in llama.cpp by `llama_context_default_params`)

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