msm: ocmem: Support for On-Chip Memory
Add initial support for on-chip memory present in copper.
This patch adds basic driver infrastructure that sets up zones.
Change-Id: I520d67dbf2178eef4ddb81799d5901d31e9976e4
Signed-off-by: Naveen Ramaraj <nramaraj@codeaurora.org>
diff --git a/arch/arm/mach-msm/include/mach/ocmem.h b/arch/arm/mach-msm/include/mach/ocmem.h
new file mode 100644
index 0000000..bf7c338
--- /dev/null
+++ b/arch/arm/mach-msm/include/mach/ocmem.h
@@ -0,0 +1,109 @@
+/* Copyright (c) 2012, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef _ARCH_ARM_MACH_MSM_OCMEM_H
+#define _ARCH_ARM_MACH_MSM_OCMEM_H
+
+#include <asm/page.h>
+#include <linux/module.h>
+#include <linux/notifier.h>
+
+#define OCMEM_MIN_ALLOC SZ_64K
+#define OCMEM_MIN_ALIGN SZ_64K
+
+/* Maximum number of slots in DM */
+#define OCMEM_MAX_CHUNKS 32
+#define MIN_CHUNK_SIZE (SZ_1K/8)
+
+struct ocmem_buf {
+ unsigned long addr;
+ unsigned long len;
+};
+
+struct ocmem_buf_attr {
+ unsigned long paddr;
+ unsigned long len;
+};
+
+struct ocmem_chunk {
+ bool ro;
+ unsigned long ddr_paddr;
+ unsigned long size;
+};
+
+struct ocmem_map_list {
+ int num_chunks;
+ struct ocmem_chunk chunks[OCMEM_MAX_CHUNKS];
+};
+
+/* List of clients that allocate/interact with OCMEM */
+/* Must be in sync with client_names */
+enum ocmem_client {
+ /* GMEM clients */
+ OCMEM_GRAPHICS = 0x0,
+ /* TCMEM clients */
+ OCMEM_VIDEO,
+ OCMEM_CAMERA,
+ /* Dummy Clients */
+ OCMEM_HP_AUDIO,
+ OCMEM_VOICE,
+ /* IMEM Clients */
+ OCMEM_LP_AUDIO,
+ OCMEM_SENSORS,
+ OCMEM_BLAST,
+ OCMEM_CLIENT_MAX,
+};
+
+/**
+ * List of OCMEM notification events which will be broadcasted
+ * to clients that optionally register for these notifications
+ * on a per allocation basis.
+ **/
+enum ocmem_notif_type {
+ OCMEM_MAP_DONE = 1,
+ OCMEM_MAP_FAIL,
+ OCMEM_UNMAP_DONE,
+ OCMEM_UNMAP_FAIL,
+ OCMEM_ALLOC_GROW,
+ OCMEM_ALLOC_SHRINK,
+ OCMEM_NOTIF_TYPE_COUNT,
+};
+
+/* APIS */
+/* Notification APIs */
+void *ocmem_notifier_register(int client_id, struct notifier_block *nb);
+
+int ocmem_notifier_unregister(void *notif_hndl, struct notifier_block *nb);
+
+/* Allocation APIs */
+struct ocmem_buf *ocmem_allocate(int client_id, unsigned long size);
+
+struct ocmem_buf *ocmem_allocate_nb(int client_id, unsigned long size);
+
+struct ocmem_buf *ocmem_allocate_range(int client_id, unsigned long min,
+ unsigned long goal, unsigned long step);
+
+/* Free APIs */
+int ocmem_free(int client_id, struct ocmem_buf *buf);
+
+/* Dynamic Resize APIs */
+int ocmem_shrink(int client_id, struct ocmem_buf *buf,
+ unsigned long new_size);
+
+int ocmem_expand(int client_id, struct ocmem_buf *buf,
+ unsigned long new_size);
+
+/* Priority Enforcement APIs */
+int ocmem_evict(int client_id);
+
+int ocmem_restore(int client_id);
+#endif