From b7de9d8c047daea9e51b06244657659fd9576dee Mon Sep 17 00:00:00 2001
From: Jens Wiklander <jens.wiklander@linaro.org>
Date: Fri, 5 May 2023 21:21:55 +0200
Subject: [PATCH] core: remove unused mobj_mm_alloc()

Removes the now unused mobj_mm_alloc(), struct mobj_mm, and friends.

Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Acked-by: Etienne Carriere <etienne.carriere@foss.st.com>
---
 core/arch/arm/kernel/link_dummies_paged.c |  1 -
 core/include/mm/mobj.h                    |  3 -
 core/mm/mobj.c                            | 99 -----------------------
 3 files changed, 103 deletions(-)

diff --git a/core/arch/arm/kernel/link_dummies_paged.c b/core/arch/arm/kernel/link_dummies_paged.c
index e0b8d5a248f..d6d65c648fb 100644
--- a/core/arch/arm/kernel/link_dummies_paged.c
+++ b/core/arch/arm/kernel/link_dummies_paged.c
@@ -44,7 +44,6 @@ __thread_std_smc_entry(uint32_t a0 __unused, uint32_t a1 __unused,
 const struct mobj_ops mobj_reg_shm_ops __rodata_dummy;
 const struct mobj_ops mobj_phys_ops __rodata_dummy;
 const struct mobj_ops mobj_virt_ops __rodata_dummy;
-const struct mobj_ops mobj_mm_ops __rodata_dummy;
 const struct mobj_ops mobj_shm_ops __rodata_dummy;
 const struct mobj_ops mobj_with_fobj_ops __rodata_dummy;
 const struct fobj_ops ops_rwp_paged_iv __rodata_dummy;
diff --git a/core/include/mm/mobj.h b/core/include/mm/mobj.h
index aefdba275c8..3b73b000809 100644
--- a/core/include/mm/mobj.h
+++ b/core/include/mm/mobj.h
@@ -226,9 +226,6 @@ static inline bool mobj_check_offset_and_len(struct mobj *mobj, size_t offset,
 	       end_offs < mobj->size;
 }
 
-struct mobj *mobj_mm_alloc(struct mobj *mobj_parent, size_t size,
-			   tee_mm_pool_t *pool);
-
 struct mobj *mobj_phys_alloc(paddr_t pa, size_t size, uint32_t cattr,
 			     enum buf_is_attr battr);
 
diff --git a/core/mm/mobj.c b/core/mm/mobj.c
index 1cf414efe24..afc8176d154 100644
--- a/core/mm/mobj.c
+++ b/core/mm/mobj.c
@@ -237,105 +237,6 @@ static void mobj_virt_assert_type(struct mobj *mobj __maybe_unused)
 
 struct mobj mobj_virt = { .ops = &mobj_virt_ops, .size = SIZE_MAX };
 
-/*
- * mobj_mm implementation
- */
-
-struct mobj_mm {
-	tee_mm_entry_t *mm;
-	struct mobj *parent_mobj;
-	struct mobj mobj;
-};
-
-static struct mobj_mm *to_mobj_mm(struct mobj *mobj);
-
-static size_t mobj_mm_offs(struct mobj *mobj, size_t offs)
-{
-	tee_mm_entry_t *mm = to_mobj_mm(mobj)->mm;
-
-	return (mm->offset << mm->pool->shift) + offs;
-}
-
-static void *mobj_mm_get_va(struct mobj *mobj, size_t offs, size_t len)
-{
-	return mobj_get_va(to_mobj_mm(mobj)->parent_mobj,
-			   mobj_mm_offs(mobj, offs), len);
-}
-
-
-static TEE_Result mobj_mm_get_pa(struct mobj *mobj, size_t offs,
-				    size_t granule, paddr_t *pa)
-{
-	return mobj_get_pa(to_mobj_mm(mobj)->parent_mobj,
-			   mobj_mm_offs(mobj, offs), granule, pa);
-}
-DECLARE_KEEP_PAGER(mobj_mm_get_pa);
-
-static size_t mobj_mm_get_phys_offs(struct mobj *mobj, size_t granule)
-{
-	return mobj_get_phys_offs(to_mobj_mm(mobj)->parent_mobj, granule);
-}
-
-static TEE_Result mobj_mm_get_mem_type(struct mobj *mobj, uint32_t *mem_type)
-{
-	return mobj_get_mem_type(to_mobj_mm(mobj)->parent_mobj, mem_type);
-}
-
-static bool mobj_mm_matches(struct mobj *mobj, enum buf_is_attr attr)
-{
-	return mobj_matches(to_mobj_mm(mobj)->parent_mobj, attr);
-}
-
-static void mobj_mm_free(struct mobj *mobj)
-{
-	struct mobj_mm *m = to_mobj_mm(mobj);
-
-	tee_mm_free(m->mm);
-	free(m);
-}
-
-/*
- * Note: this variable is weak just to ease breaking its dependency chain
- * when added to the unpaged area.
- */
-const struct mobj_ops mobj_mm_ops __weak __relrodata_unpaged("mobj_mm_ops") = {
-	.get_va = mobj_mm_get_va,
-	.get_pa = mobj_mm_get_pa,
-	.get_phys_offs = mobj_mm_get_phys_offs,
-	.get_mem_type = mobj_mm_get_mem_type,
-	.matches = mobj_mm_matches,
-	.free = mobj_mm_free,
-};
-
-static struct mobj_mm *to_mobj_mm(struct mobj *mobj)
-{
-	assert(mobj->ops == &mobj_mm_ops);
-	return container_of(mobj, struct mobj_mm, mobj);
-}
-
-struct mobj *mobj_mm_alloc(struct mobj *mobj_parent, size_t size,
-			      tee_mm_pool_t *pool)
-{
-	struct mobj_mm *m = calloc(1, sizeof(*m));
-
-	if (!m)
-		return NULL;
-
-	m->mm = tee_mm_alloc(pool, size);
-	if (!m->mm) {
-		free(m);
-		return NULL;
-	}
-
-	m->parent_mobj = mobj_parent;
-	m->mobj.size = size;
-	m->mobj.ops = &mobj_mm_ops;
-	refcount_set(&m->mobj.refc, 1);
-
-	return &m->mobj;
-}
-
-
 /*
  * mobj_shm implementation. mobj_shm represents buffer in predefined shm region
  * - it is physically contiguous.