brcmfmac: Adding msgbuf protocol.

This patch will add the msgbuf protocol. This protocol is used by
the soon to be added new bus interface PCIe. Msgbuf is a protocol
where most data is and remains located on the host (driver) side
and transferred by DMA from and to device. Msgbuf is the protocol
which takes care of the signalling of the buffers between host and
device which identifies this DMA-able data.

Reviewed-by: Arend Van Spriel <arend@broadcom.com>
Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Daniel (Deognyoun) Kim <dekim@broadcom.com>
Signed-off-by: Hante Meuleman <meuleman@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 32 insertions, 0 deletions

diff --git a/drivers/net/wireless/brcm80211/brcmfmac/dhd_bus.h b/drivers/net/wireless/brcm80211/brcmfmac/dhd_bus.h
index 7735328fff21..4053368eb743 100644
--- a/drivers/net/wireless/brcm80211/brcmfmac/dhd_bus.h
+++ b/drivers/net/wireless/brcm80211/brcmfmac/dhd_bus.h
@@ -19,6 +19,18 @@
 
 #include "dhd_dbg.h"
 
+/* IDs of the 6 default common rings of msgbuf protocol */
+#define BRCMF_H2D_MSGRING_CONTROL_SUBMIT	0
+#define BRCMF_H2D_MSGRING_RXPOST_SUBMIT		1
+#define BRCMF_D2H_MSGRING_CONTROL_COMPLETE	2
+#define BRCMF_D2H_MSGRING_TX_COMPLETE		3
+#define BRCMF_D2H_MSGRING_RX_COMPLETE		4
+
+#define BRCMF_NROF_H2D_COMMON_MSGRINGS		2
+#define BRCMF_NROF_D2H_COMMON_MSGRINGS		3
+#define BRCMF_NROF_COMMON_MSGRINGS	(BRCMF_NROF_H2D_COMMON_MSGRINGS + \
+					 BRCMF_NROF_D2H_COMMON_MSGRINGS)
+
 /* The level of bus communication with the dongle */
 enum brcmf_bus_state {
 	BRCMF_BUS_UNKNOWN,	/* Not determined yet */
@@ -70,6 +82,25 @@ struct brcmf_bus_ops {
 	struct pktq * (*gettxq)(struct device *dev);
 };
 
+
+/**
+ * struct brcmf_bus_msgbuf - bus ringbuf if in case of msgbuf.
+ *
+ * @commonrings: commonrings which are always there.
+ * @flowrings: commonrings which are dynamically created and destroyed for data.
+ * @rx_dataoffset: if set then all rx data has this this offset.
+ * @max_rxbufpost: maximum number of buffers to post for rx.
+ * @nrof_flowrings: number of flowrings.
+ */
+struct brcmf_bus_msgbuf {
+	struct brcmf_commonring *commonrings[BRCMF_NROF_COMMON_MSGRINGS];
+	struct brcmf_commonring **flowrings;
+	u32 rx_dataoffset;
+	u32 max_rxbufpost;
+	u32 nrof_flowrings;
+};
+
+
 /**
  * struct brcmf_bus - interface structure between common and bus layer
  *
@@ -101,6 +132,7 @@ struct brcmf_bus {
 	bool always_use_fws_queue;
 
 	struct brcmf_bus_ops *ops;
+	struct brcmf_bus_msgbuf *msgbuf;
 };
 
 /*