mailbox: Add driver for Broadcom FlexRM ring manager

Some of the Broadcom iProc SoCs have FlexRM ring manager
which provides a ring-based programming interface to various
offload engines (e.g. RAID, Crypto, etc).

This patch adds a common mailbox driver for Broadcom FlexRM
ring manager which can be shared by various offload engine
drivers (implemented as mailbox clients).

Reviewed-by: Ray Jui <ray.jui@broadcom.com>
Reviewed-by: Scott Branden <scott.branden@broadcom.com>
Reviewed-by: Pramod KUMAR <pramod.kumar@broadcom.com>
Signed-off-by: Anup Patel <anup.patel@broadcom.com>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>

1 files changed, 10 insertions, 4 deletions

diff --git a/include/linux/mailbox/brcm-message.h b/include/linux/mailbox/brcm-message.h
index 6b55c938b401..c20b4843fc2d 100644
--- a/include/linux/mailbox/brcm-message.h
+++ b/include/linux/mailbox/brcm-message.h
@@ -16,6 +16,7 @@
 
 enum brcm_message_type {
         BRCM_MESSAGE_UNKNOWN = 0,
+        BRCM_MESSAGE_BATCH,
         BRCM_MESSAGE_SPU,
         BRCM_MESSAGE_SBA,
         BRCM_MESSAGE_MAX,
@@ -23,24 +24,29 @@ enum brcm_message_type {
 
 struct brcm_sba_command {
         u64 cmd;
+        u64 *cmd_dma;
+        dma_addr_t cmd_dma_addr;
 #define BRCM_SBA_CMD_TYPE_A             BIT(0)
 #define BRCM_SBA_CMD_TYPE_B             BIT(1)
 #define BRCM_SBA_CMD_TYPE_C             BIT(2)
 #define BRCM_SBA_CMD_HAS_RESP           BIT(3)
 #define BRCM_SBA_CMD_HAS_OUTPUT         BIT(4)
         u64 flags;
-        dma_addr_t input;
-        size_t input_len;
         dma_addr_t resp;
         size_t resp_len;
-        dma_addr_t output;
-        size_t output_len;
+        dma_addr_t data;
+        size_t data_len;
 };
 
 struct brcm_message {
         enum brcm_message_type type;
         union {
                 struct {
+                        struct brcm_message *msgs;
+                        unsigned int msgs_queued;
+                        unsigned int msgs_count;
+                } batch;
+                struct {
                         struct scatterlist *src;
                         struct scatterlist *dst;
                 } spu;