efi_loader: move dp_alloc() to efi_alloc()

The incumbent function efi_alloc() is unused.

Replace dp_alloc() by a new function efi_alloc() that we can use more
widely.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>

3 files changed, 40 insertions, 50 deletions

diff --git a/include/efi_loader.h b/include/efi_loader.h
index 1542b4b625c..cee04cbb9dc 100644
--- a/include/efi_loader.h
+++ b/include/efi_loader.h
@@ -724,8 +724,8 @@ efi_status_t efi_next_variable_name(efi_uintn_t *size, u16 **buf,
  * Return:	size in pages
  */
 #define efi_size_in_pages(size) (((size) + EFI_PAGE_MASK) >> EFI_PAGE_SHIFT)
-/* Generic EFI memory allocator, call this to get memory */
-void *efi_alloc(uint64_t len, int memory_type);
+/* Allocate boot service data pool memory */
+void *efi_alloc(size_t len);
 /* Allocate pages on the specified alignment */
 void *efi_alloc_aligned_pages(u64 len, int memory_type, size_t align);
 /* More specific EFI memory allocator, called by EFI payloads */
diff --git a/lib/efi_loader/efi_device_path.c b/lib/efi_loader/efi_device_path.c
index b6dd575b13b..d5cc4958304 100644
--- a/lib/efi_loader/efi_device_path.c
+++ b/lib/efi_loader/efi_device_path.c
@@ -63,20 +63,6 @@ static bool is_sd(struct blk_desc *desc)
 }
 #endif
 
-static void *dp_alloc(size_t sz)
-{
-	void *buf;
-
-	if (efi_allocate_pool(EFI_BOOT_SERVICES_DATA, sz, &buf) !=
-	    EFI_SUCCESS) {
-		debug("EFI: ERROR: out of memory in %s\n", __func__);
-		return NULL;
-	}
-
-	memset(buf, 0, sz);
-	return buf;
-}
-
 /*
  * Iterate to next block in device-path, terminating (returning NULL)
  * at /End* node.
@@ -302,7 +288,7 @@ struct efi_device_path *efi_dp_dup(const struct efi_device_path *dp)
 	if (!dp)
 		return NULL;
 
-	ndp = dp_alloc(sz);
+	ndp = efi_alloc(sz);
 	if (!ndp)
 		return NULL;
 	memcpy(ndp, dp, sz);
@@ -346,7 +332,7 @@ efi_device_path *efi_dp_append_or_concatenate(const struct efi_device_path *dp1,
 		/* both dp1 and dp2 are non-null */
 		unsigned sz1 = efi_dp_size(dp1);
 		unsigned sz2 = efi_dp_size(dp2);
-		void *p = dp_alloc(sz1 + sz2 + end_size);
+		void *p = efi_alloc(sz1 + sz2 + end_size);
 		if (!p)
 			return NULL;
 		ret = p;
@@ -409,7 +395,7 @@ struct efi_device_path *efi_dp_append_node(const struct efi_device_path *dp,
 		ret = efi_dp_dup(dp);
 	} else if (!dp) {
 		size_t sz = node->length;
-		void *p = dp_alloc(sz + sizeof(END));
+		void *p = efi_alloc(sz + sizeof(END));
 		if (!p)
 			return NULL;
 		memcpy(p, node, sz);
@@ -418,7 +404,7 @@ struct efi_device_path *efi_dp_append_node(const struct efi_device_path *dp,
 	} else {
 		/* both dp and node are non-null */
 		size_t sz = efi_dp_size(dp);
-		void *p = dp_alloc(sz + node->length + sizeof(END));
+		void *p = efi_alloc(sz + node->length + sizeof(END));
 		if (!p)
 			return NULL;
 		memcpy(p, dp, sz);
@@ -439,7 +425,7 @@ struct efi_device_path *efi_dp_create_device_node(const u8 type,
 	if (length < sizeof(struct efi_device_path))
 		return NULL;
 
-	ret = dp_alloc(length);
+	ret = efi_alloc(length);
 	if (!ret)
 		return ret;
 	ret->type = type;
@@ -461,7 +447,7 @@ struct efi_device_path *efi_dp_append_instance(
 		return efi_dp_dup(dpi);
 	sz = efi_dp_size(dp);
 	szi = efi_dp_instance_size(dpi);
-	p = dp_alloc(sz + szi + 2 * sizeof(END));
+	p = efi_alloc(sz + szi + 2 * sizeof(END));
 	if (!p)
 		return NULL;
 	ret = p;
@@ -486,7 +472,7 @@ struct efi_device_path *efi_dp_get_next_instance(struct efi_device_path **dp,
 	if (!dp || !*dp)
 		return NULL;
 	sz = efi_dp_instance_size(*dp);
-	p = dp_alloc(sz + sizeof(END));
+	p = efi_alloc(sz + sizeof(END));
 	if (!p)
 		return NULL;
 	memcpy(p, *dp, sz + sizeof(END));
@@ -927,7 +913,7 @@ struct efi_device_path *efi_dp_from_part(struct blk_desc *desc, int part)
 {
 	void *buf, *start;
 
-	start = buf = dp_alloc(dp_part_size(desc, part) + sizeof(END));
+	start = buf = efi_alloc(dp_part_size(desc, part) + sizeof(END));
 	if (!buf)
 		return NULL;
 
@@ -954,7 +940,7 @@ struct efi_device_path *efi_dp_part_node(struct blk_desc *desc, int part)
 		dpsize = sizeof(struct efi_device_path_cdrom_path);
 	else
 		dpsize = sizeof(struct efi_device_path_hard_drive_path);
-	buf = dp_alloc(dpsize);
+	buf = efi_alloc(dpsize);
 
 	if (buf)
 		dp_part_node(buf, desc, part);
@@ -1028,7 +1014,7 @@ struct efi_device_path *efi_dp_from_file(struct blk_desc *desc, int part,
 
 	dpsize += fpsize;
 
-	start = buf = dp_alloc(dpsize + sizeof(END));
+	start = buf = efi_alloc(dpsize + sizeof(END));
 	if (!buf)
 		return NULL;
 
@@ -1056,7 +1042,7 @@ struct efi_device_path *efi_dp_from_uart(void)
 	struct efi_device_path_uart *uart;
 	size_t dpsize = sizeof(ROOT) + sizeof(*uart) + sizeof(END);
 
-	buf = dp_alloc(dpsize);
+	buf = efi_alloc(dpsize);
 	if (!buf)
 		return NULL;
 	pos = buf;
@@ -1082,7 +1068,7 @@ struct efi_device_path *efi_dp_from_eth(void)
 
 	dpsize += dp_size(eth_get_dev());
 
-	start = buf = dp_alloc(dpsize + sizeof(END));
+	start = buf = efi_alloc(dpsize + sizeof(END));
 	if (!buf)
 		return NULL;
 
@@ -1102,7 +1088,7 @@ struct efi_device_path *efi_dp_from_mem(uint32_t memory_type,
 	struct efi_device_path_memory *mdp;
 	void *buf, *start;
 
-	start = buf = dp_alloc(sizeof(*mdp) + sizeof(END));
+	start = buf = efi_alloc(sizeof(*mdp) + sizeof(END));
 	if (!buf)
 		return NULL;
 
diff --git a/lib/efi_loader/efi_memory.c b/lib/efi_loader/efi_memory.c
index b7bee98f79c..8f82496740f 100644
--- a/lib/efi_loader/efi_memory.c
+++ b/lib/efi_loader/efi_memory.c
@@ -5,9 +5,12 @@
  *  Copyright (c) 2016 Alexander Graf
  */
 
+#define LOG_CATEGORY LOGC_EFI
+
 #include <common.h>
 #include <efi_loader.h>
 #include <init.h>
+#include <log.h>
 #include <malloc.h>
 #include <mapmem.h>
 #include <watchdog.h>
@@ -534,27 +537,6 @@ efi_status_t efi_allocate_pages(enum efi_allocate_type type,
 }
 
 /**
- * efi_alloc() - allocate memory pages
- *
- * @len:		size of the memory to be allocated
- * @memory_type:	usage type of the allocated memory
- * Return:		pointer to the allocated memory area or NULL
- */
-void *efi_alloc(uint64_t len, int memory_type)
-{
-	uint64_t ret = 0;
-	uint64_t pages = efi_size_in_pages(len);
-	efi_status_t r;
-
-	r = efi_allocate_pages(EFI_ALLOCATE_ANY_PAGES, memory_type, pages,
-			       &ret);
-	if (r == EFI_SUCCESS)
-		return (void*)(uintptr_t)ret;
-
-	return NULL;
-}
-
-/**
  * efi_free_pages() - free memory pages
  *
  * @memory:	start of the memory area to be freed
@@ -673,6 +655,28 @@ efi_status_t efi_allocate_pool(enum efi_memory_type pool_type, efi_uintn_t size,
 }
 
 /**
+ * efi_alloc() - allocate boot services data pool memory
+ *
+ * Allocate memory from pool and zero it out.
+ *
+ * @size:	number of bytes to allocate
+ * Return:	pointer to allocated memory or NULL
+ */
+void *efi_alloc(size_t size)
+{
+	void *buf;
+
+	if (efi_allocate_pool(EFI_BOOT_SERVICES_DATA, size, &buf) !=
+	    EFI_SUCCESS) {
+		log_err("out of memory");
+		return NULL;
+	}
+	memset(buf, 0, size);
+
+	return buf;
+}
+
+/**
  * efi_free_pool() - free memory from pool
  *
  * @buffer:	start of memory to be freed