decode ggla

convert/convert.go

@@ -112,7 +112,7 @@ func ReadSafeTensors(fn string, offset uint64) ([]llm.Tensor, uint64, error) {
 			Name:          ggufName,
 			Kind:          kind,
 			Offset:        offset,
-			Shape:         shape,
+			Shape:         shape[:],
 			FileName:      fn,
 			OffsetPadding: 8 + jsonSize,
 			FileOffsets:   []uint64{uint64(data.Offsets[0]), uint64(data.Offsets[1])},

llm/ggla.go

+package llm
+
+import (
+	"encoding/binary"
+	"errors"
+	"io"
+	"slices"
+)
+
+type ContainerGGLA struct {
+	version uint32
+}
+
+func (c *ContainerGGLA) Name() string {
+	return "ggla"
+}
+
+func (c *ContainerGGLA) Decode(rso *readSeekOffset) (model, error) {
+	binary.Read(rso, binary.LittleEndian, &c.version)
+
+	switch c.version {
+	case 1:
+	default:
+		return nil, errors.New("invalid version")
+	}
+
+	model := newModelGGLA(c)
+	err := model.decode(rso)
+	return model, err
+}
+
+type ModelGGLA struct {
+	*ContainerGGLA
+
+	kv      KV
+	tensors []Tensor
+}
+
+func newModelGGLA(container *ContainerGGLA) *ModelGGLA {
+	return &ModelGGLA{
+		ContainerGGLA: container,
+		kv:            make(KV),
+	}
+}
+
+func (m *ModelGGLA) decode(rso *readSeekOffset) error {
+	var r uint32
+	if err := binary.Read(rso, binary.LittleEndian, &r); err != nil {
+		return err
+	}
+	m.kv["r"] = r
+
+	var alpha uint32
+	if err := binary.Read(rso, binary.LittleEndian, &alpha); err != nil {
+		return err
+	}
+	m.kv["alpha"] = alpha
+
+	for {
+		var dims uint32
+		if err := binary.Read(rso, binary.LittleEndian, &dims); err != nil {
+			return err
+		}
+
+		var namesize uint32
+		if err := binary.Read(rso, binary.LittleEndian, &namesize); err != nil {
+			return err
+		}
+
+		var t Tensor
+		if err := binary.Read(rso, binary.LittleEndian, &t.Kind); err != nil {
+			return err
+		}
+
+		t.Shape = make([]uint64, dims)
+		for i := 0; uint32(i) < dims; i++ {
+			var shape32 uint32
+			if err := binary.Read(rso, binary.LittleEndian, &shape32); err != nil {
+				return err
+			}
+
+			t.Shape[i] = uint64(shape32)
+		}
+
+		// ggla tensor shape is reversed
+		// ref: https://github.com/ggerganov/llama.cpp/blob/29ae62d2ae163e2b68aa0ad3bf2ab4636de0c957/convert-lora-to-ggml.py#L44
+		slices.Reverse(t.Shape)
+
+		name := make([]byte, namesize)
+		if err := binary.Read(rso, binary.LittleEndian, &name); err != nil {
+			return err
+		}
+
+		t.Name = string(name)
+
+		if _, err := rso.Seek((rso.offset+31)&-32, io.SeekStart); err != nil {
+			return err
+		}
+
+		t.Offset = uint64(rso.offset)
+
+		if _, err := rso.Seek(int64(t.Size()), io.SeekCurrent); err != nil {
+			return err
+		}
+
+		m.tensors = append(m.tensors, t)
+	}
+}
+
+func (m *ModelGGLA) KV() KV {
+	return m.kv
+}
+
+func (m *ModelGGLA) Tensor() []Tensor {
+	return m.tensors
+}
+
+func (*ModelGGLA) ModelFamily() string {
+	return "ggla"
+}
+
+func (*ModelGGLA) ModelType() string {
+	panic("not implemented")
+}
+
+func (*ModelGGLA) FileType() string {
+	panic("not implemented")
+}
+
+func (*ModelGGLA) NumLayers() uint32 {
+	panic("not implemented")
+}
+
+func (*ModelGGLA) NumGQA() uint32 {
+	panic("not implemented")
+}
+
+func (*ModelGGLA) NumEmbed() uint32 {
+	panic("not implemented")
+}
+
+func (*ModelGGLA) NumHead() uint32 {
+	panic("not implemented")
+}
+
+func (*ModelGGLA) NumHeadKv() uint32 {
+	panic("not implemented")
+}
+
+func (*ModelGGLA) NumCtx() uint32 {
+	panic("not implemented")
+}

llm/ggml.go

@@ -106,32 +106,6 @@ type container interface {
 	Decode(*readSeekOffset) (model, error)
 }
 
-type containerLORA struct {
-	version uint32
-}
-
-func (c *containerLORA) Name() string {
-	return "ggla"
-}
-
-func (c *containerLORA) Decode(rso *readSeekOffset) (model, error) {
-	var version uint32
-	binary.Read(rso, binary.LittleEndian, &version)
-
-	switch version {
-	case 1:
-	default:
-		return nil, errors.New("invalid version")
-	}
-
-	c.version = version
-
-	// remaining file contents aren't decoded
-	rso.Seek(0, io.SeekEnd)
-
-	return nil, nil
-}
-
 const (
 	// Magic constant for `ggml` files (unversioned).
 	FILE_MAGIC_GGML = 0x67676d6c
@@ -161,7 +135,7 @@ func DecodeGGML(r io.ReadSeeker) (*GGML, error) {
 	case FILE_MAGIC_GGML, FILE_MAGIC_GGMF, FILE_MAGIC_GGJT:
 		return nil, ErrUnsupportedFormat
 	case FILE_MAGIC_GGLA:
-		c = &containerLORA{}
+		c = &ContainerGGLA{}
 	case FILE_MAGIC_GGUF_LE:
 		c = &ContainerGGUF{ByteOrder: binary.LittleEndian}
 	case FILE_MAGIC_GGUF_BE:
@@ -171,7 +145,9 @@ func DecodeGGML(r io.ReadSeeker) (*GGML, error) {
 	}
 
 	model, err := c.Decode(&ro)
-	if err != nil {
+	if errors.Is(err, io.EOF) {
+		// noop
+	} else if err != nil {
 		return nil, err
 	}
 

llm/gguf.go

@@ -94,7 +94,7 @@ type Tensor struct {
 	Offset uint64
 
 	// shape is the number of elements in each dimension
-	Shape [4]uint64
+	Shape []uint64
 
 	FileName      string
 	OffsetPadding uint64
@@ -156,7 +156,11 @@ func (t Tensor) TypeSize() uint64 {
 }
 
 func (t Tensor) Parameters() uint64 {
-	return t.Shape[0] * t.Shape[1] * t.Shape[2] * t.Shape[3]
+	var count uint64 = 1
+	for _, n := range t.Shape {
+		count *= n
+	}
+	return count
 }
 
 func (t Tensor) Size() uint64 {
@@ -703,7 +707,7 @@ func (llm *GGUFModel) Decode(rso *readSeekOffset) error {
 			Name:   name,
 			Kind:   llm.readU32(rso),
 			Offset: llm.readU64(rso),
-			Shape:  shape,
+			Shape:  shape[:],
 		}
 
 		llm.Tensors = append(llm.Tensors, tensor)

server/images.go

@@ -473,7 +473,13 @@ func CreateModel(ctx context.Context, name, modelFileDir string, commands []pars
 			}
 			defer bin.Close()
 
-			layer, err := NewLayer(bin, mediatype)
+			ggml, err := llm.DecodeGGML(bin)
+			if err != nil {
+				return err
+			}
+
+			sr := io.NewSectionReader(bin, 0, ggml.Size)
+			layer, err := NewLayer(sr, mediatype)
 			if err != nil {
 				return err
 			}