bna: MSGQ Implementation

Change details:
 - Currently modules communicate with the FW using 32 byte command and
   response register. This limits the size of the command and response
   messages exchanged with the FW to 32 bytes. We need a mechanism to
   exchange the comamnds and responses exchange with FW that exceeds 32 bytes.

 - MSGQ implementation provides that facility. It removes the assumption that
   command/response queue size is precisely calculated to accommodate all
   concurrent FW commands/responses. The queue depth is made variable now, defined
   by a macro. A waiting command list is implemented to hold all the commands
   when there is no place in the command queue. Callback is implemented for
   each command entry to invoke the module posting the command, when there is
   space in the command queue and the command was finally posted to the queue.
   Module/Object information is embedded in the response for tracking purpose.

Signed-off-by: Rasesh Mody <rmody@brocade.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 101 insertions, 0 deletions

diff --git a/drivers/net/ethernet/brocade/bna/bfi.h b/drivers/net/ethernet/brocade/bna/bfi.h
index 088211c2724f..6a53183e411e 100644
--- a/drivers/net/ethernet/brocade/bna/bfi.h
+++ b/drivers/net/ethernet/brocade/bna/bfi.h
@@ -192,6 +192,8 @@ enum bfi_mclass {
 
 #define BFI_BOOT_LOADER_OS		0
 
+#define BFI_FWBOOT_ENV_OS		0
+
 #define BFI_BOOT_MEMTEST_RES_ADDR   0x900
 #define BFI_BOOT_MEMTEST_RES_SIG    0xA0A1A2A3
 
@@ -395,6 +397,105 @@ union bfi_ioc_i2h_msg_u {
 	u32			mboxmsg[BFI_IOC_MSGSZ];
 };
 
+/**
+ *----------------------------------------------------------------------
+ *				MSGQ
+ *----------------------------------------------------------------------
+ */
+
+enum bfi_msgq_h2i_msgs {
+	BFI_MSGQ_H2I_INIT_REQ	   = 1,
+	BFI_MSGQ_H2I_DOORBELL_PI	= 2,
+	BFI_MSGQ_H2I_DOORBELL_CI	= 3,
+	BFI_MSGQ_H2I_CMDQ_COPY_RSP      = 4,
+};
+
+enum bfi_msgq_i2h_msgs {
+	BFI_MSGQ_I2H_INIT_RSP	   = BFA_I2HM(BFI_MSGQ_H2I_INIT_REQ),
+	BFI_MSGQ_I2H_DOORBELL_PI	= BFA_I2HM(BFI_MSGQ_H2I_DOORBELL_PI),
+	BFI_MSGQ_I2H_DOORBELL_CI	= BFA_I2HM(BFI_MSGQ_H2I_DOORBELL_CI),
+	BFI_MSGQ_I2H_CMDQ_COPY_REQ      = BFA_I2HM(BFI_MSGQ_H2I_CMDQ_COPY_RSP),
+};
+
+/* Messages(commands/responsed/AENS will have the following header */
+struct bfi_msgq_mhdr {
+	u8	msg_class;
+	u8	msg_id;
+	u16	msg_token;
+	u16	num_entries;
+	u8	enet_id;
+	u8	rsvd[1];
+};
+
+#define bfi_msgq_mhdr_set(_mh, _mc, _mid, _tok, _enet_id) do {	\
+	(_mh).msg_class	 = (_mc);	\
+	(_mh).msg_id	    = (_mid);       \
+	(_mh).msg_token	 = (_tok);       \
+	(_mh).enet_id	   = (_enet_id);   \
+} while (0)
+
+/*
+ * Mailbox  for messaging interface
+ */
+#define BFI_MSGQ_CMD_ENTRY_SIZE	 (64)    /* TBD */
+#define BFI_MSGQ_RSP_ENTRY_SIZE	 (64)    /* TBD */
+
+#define bfi_msgq_num_cmd_entries(_size)				 \
+	(((_size) + BFI_MSGQ_CMD_ENTRY_SIZE - 1) / BFI_MSGQ_CMD_ENTRY_SIZE)
+
+struct bfi_msgq {
+	union bfi_addr_u addr;
+	u16 q_depth;     /* Total num of entries in the queue */
+	u8 rsvd[2];
+};
+
+/* BFI_ENET_MSGQ_CFG_REQ TBD init or cfg? */
+struct bfi_msgq_cfg_req {
+	struct bfi_mhdr mh;
+	struct bfi_msgq cmdq;
+	struct bfi_msgq rspq;
+};
+
+/* BFI_ENET_MSGQ_CFG_RSP */
+struct bfi_msgq_cfg_rsp {
+	struct bfi_mhdr mh;
+	u8 cmd_status;
+	u8 rsvd[3];
+};
+
+/* BFI_MSGQ_H2I_DOORBELL */
+struct bfi_msgq_h2i_db {
+	struct bfi_mhdr mh;
+	union {
+		u16 cmdq_pi;
+		u16 rspq_ci;
+	} idx;
+};
+
+/* BFI_MSGQ_I2H_DOORBELL */
+struct bfi_msgq_i2h_db {
+	struct bfi_mhdr mh;
+	union {
+		u16 rspq_pi;
+		u16 cmdq_ci;
+	} idx;
+};
+
+#define BFI_CMD_COPY_SZ 28
+
+/* BFI_MSGQ_H2I_CMD_COPY_RSP */
+struct bfi_msgq_h2i_cmdq_copy_rsp {
+	struct bfi_mhdr mh;
+	u8	      data[BFI_CMD_COPY_SZ];
+};
+
+/* BFI_MSGQ_I2H_CMD_COPY_REQ */
+struct bfi_msgq_i2h_cmdq_copy_req {
+	struct bfi_mhdr mh;
+	u16     offset;
+	u16     len;
+};
+
 #pragma pack()
 
 #endif /* __BFI_H__ */