Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 248 insertions, 0 deletions

diff --git a/drivers/net/ethernet/qualcomm/emac/emac-mac.h b/drivers/net/ethernet/qualcomm/emac/emac-mac.h
new file mode 100644
index 000000000..4beedb8fa
--- /dev/null
+++ b/drivers/net/ethernet/qualcomm/emac/emac-mac.h
@@ -0,0 +1,248 @@
+/* Copyright (c) 2013-2016, The Linux Foundation. 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.
+ */
+
+/* EMAC DMA HW engine uses three rings:
+ * Tx:
+ *   TPD: Transmit Packet Descriptor ring.
+ * Rx:
+ *   RFD: Receive Free Descriptor ring.
+ *     Ring of descriptors with empty buffers to be filled by Rx HW.
+ *   RRD: Receive Return Descriptor ring.
+ *     Ring of descriptors with buffers filled with received data.
+ */
+
+#ifndef _EMAC_HW_H_
+#define _EMAC_HW_H_
+
+/* EMAC_CSR register offsets */
+#define EMAC_EMAC_WRAPPER_CSR1                                0x000000
+#define EMAC_EMAC_WRAPPER_CSR2                                0x000004
+#define EMAC_EMAC_WRAPPER_TX_TS_LO                            0x000104
+#define EMAC_EMAC_WRAPPER_TX_TS_HI                            0x000108
+#define EMAC_EMAC_WRAPPER_TX_TS_INX                           0x00010c
+
+/* DMA Order Settings */
+enum emac_dma_order {
+	emac_dma_ord_in = 1,
+	emac_dma_ord_enh = 2,
+	emac_dma_ord_out = 4
+};
+
+enum emac_dma_req_block {
+	emac_dma_req_128 = 0,
+	emac_dma_req_256 = 1,
+	emac_dma_req_512 = 2,
+	emac_dma_req_1024 = 3,
+	emac_dma_req_2048 = 4,
+	emac_dma_req_4096 = 5
+};
+
+/* Returns the value of bits idx...idx+n_bits */
+#define BITS_GET(val, lo, hi) ((le32_to_cpu(val) & GENMASK((hi), (lo))) >> lo)
+#define BITS_SET(val, lo, hi, new_val) \
+	val = cpu_to_le32((le32_to_cpu(val) & (~GENMASK((hi), (lo)))) |	\
+		(((new_val) << (lo)) & GENMASK((hi), (lo))))
+
+/* RRD (Receive Return Descriptor) */
+struct emac_rrd {
+	u32	word[6];
+
+/* number of RFD */
+#define RRD_NOR(rrd)			BITS_GET((rrd)->word[0], 16, 19)
+/* start consumer index of rfd-ring */
+#define RRD_SI(rrd)			BITS_GET((rrd)->word[0], 20, 31)
+/* vlan-tag (CVID, CFI and PRI) */
+#define RRD_CVALN_TAG(rrd)		BITS_GET((rrd)->word[2], 0, 15)
+/* length of the packet */
+#define RRD_PKT_SIZE(rrd)		BITS_GET((rrd)->word[3], 0, 13)
+/* L4(TCP/UDP) checksum failed */
+#define RRD_L4F(rrd)			BITS_GET((rrd)->word[3], 14, 14)
+/* vlan tagged */
+#define RRD_CVTAG(rrd)			BITS_GET((rrd)->word[3], 16, 16)
+/* When set, indicates that the descriptor is updated by the IP core.
+ * When cleared, indicates that the descriptor is invalid.
+ */
+#define RRD_UPDT(rrd)			BITS_GET((rrd)->word[3], 31, 31)
+#define RRD_UPDT_SET(rrd, val)		BITS_SET((rrd)->word[3], 31, 31, val)
+/* timestamp low */
+#define RRD_TS_LOW(rrd)			BITS_GET((rrd)->word[4], 0, 29)
+/* timestamp high */
+#define RRD_TS_HI(rrd)			le32_to_cpu((rrd)->word[5])
+};
+
+/* TPD (Transmit Packet Descriptor) */
+struct emac_tpd {
+	u32				word[4];
+
+/* Number of bytes of the transmit packet. (include 4-byte CRC) */
+#define TPD_BUF_LEN_SET(tpd, val)	BITS_SET((tpd)->word[0], 0, 15, val)
+/* Custom Checksum Offload: When set, ask IP core to offload custom checksum */
+#define TPD_CSX_SET(tpd, val)		BITS_SET((tpd)->word[1], 8, 8, val)
+/* TCP Large Send Offload: When set, ask IP core to do offload TCP Large Send */
+#define TPD_LSO(tpd)			BITS_GET((tpd)->word[1], 12, 12)
+#define TPD_LSO_SET(tpd, val)		BITS_SET((tpd)->word[1], 12, 12, val)
+/*  Large Send Offload Version: When set, indicates this is an LSOv2
+ * (for both IPv4 and IPv6). When cleared, indicates this is an LSOv1
+ * (only for IPv4).
+ */
+#define TPD_LSOV_SET(tpd, val)		BITS_SET((tpd)->word[1], 13, 13, val)
+/* IPv4 packet: When set, indicates this is an  IPv4 packet, this bit is only
+ * for LSOV2 format.
+ */
+#define TPD_IPV4_SET(tpd, val)		BITS_SET((tpd)->word[1], 16, 16, val)
+/* 0: Ethernet   frame (DA+SA+TYPE+DATA+CRC)
+ * 1: IEEE 802.3 frame (DA+SA+LEN+DSAP+SSAP+CTL+ORG+TYPE+DATA+CRC)
+ */
+#define TPD_TYP_SET(tpd, val)		BITS_SET((tpd)->word[1], 17, 17, val)
+/* Low-32bit Buffer Address */
+#define TPD_BUFFER_ADDR_L_SET(tpd, val)	((tpd)->word[2] = cpu_to_le32(val))
+/* CVLAN Tag to be inserted if INS_VLAN_TAG is set, CVLAN TPID based on global
+ * register configuration.
+ */
+#define TPD_CVLAN_TAG_SET(tpd, val)	BITS_SET((tpd)->word[3], 0, 15, val)
+/*  Insert CVlan Tag: When set, ask MAC to insert CVLAN TAG to outgoing packet
+ */
+#define TPD_INSTC_SET(tpd, val)		BITS_SET((tpd)->word[3], 17, 17, val)
+/* High-14bit Buffer Address, So, the 64b-bit address is
+ * {DESC_CTRL_11_TX_DATA_HIADDR[17:0],(register) BUFFER_ADDR_H, BUFFER_ADDR_L}
+ * Extend TPD_BUFFER_ADDR_H to [31, 18], because we never enable timestamping.
+ */
+#define TPD_BUFFER_ADDR_H_SET(tpd, val)	BITS_SET((tpd)->word[3], 18, 31, val)
+/* Format D. Word offset from the 1st byte of this packet to start to calculate
+ * the custom checksum.
+ */
+#define TPD_PAYLOAD_OFFSET_SET(tpd, val) BITS_SET((tpd)->word[1], 0, 7, val)
+/*  Format D. Word offset from the 1st byte of this packet to fill the custom
+ * checksum to
+ */
+#define TPD_CXSUM_OFFSET_SET(tpd, val)	BITS_SET((tpd)->word[1], 18, 25, val)
+
+/* Format C. TCP Header offset from the 1st byte of this packet. (byte unit) */
+#define TPD_TCPHDR_OFFSET_SET(tpd, val)	BITS_SET((tpd)->word[1], 0, 7, val)
+/* Format C. MSS (Maximum Segment Size) got from the protocol layer. (byte unit)
+ */
+#define TPD_MSS_SET(tpd, val)		BITS_SET((tpd)->word[1], 18, 30, val)
+/* packet length in ext tpd */
+#define TPD_PKT_LEN_SET(tpd, val)	((tpd)->word[2] = cpu_to_le32(val))
+};
+
+/* emac_ring_header represents a single, contiguous block of DMA space
+ * mapped for the three descriptor rings (tpd, rfd, rrd)
+ */
+struct emac_ring_header {
+	void			*v_addr;	/* virtual address */
+	dma_addr_t		dma_addr;	/* dma address */
+	size_t			size;		/* length in bytes */
+	size_t			used;
+};
+
+/* emac_buffer is wrapper around a pointer to a socket buffer
+ * so a DMA handle can be stored along with the skb
+ */
+struct emac_buffer {
+	struct sk_buff		*skb;		/* socket buffer */
+	u16			length;		/* rx buffer length */
+	dma_addr_t		dma_addr;	/* dma address */
+};
+
+/* receive free descriptor (rfd) ring */
+struct emac_rfd_ring {
+	struct emac_buffer	*rfbuff;
+	u32			*v_addr;	/* virtual address */
+	dma_addr_t		dma_addr;	/* dma address */
+	size_t			size;		/* length in bytes */
+	unsigned int		count;		/* number of desc in the ring */
+	unsigned int		produce_idx;
+	unsigned int		process_idx;
+	unsigned int		consume_idx;	/* unused */
+};
+
+/* Receive Return Desciptor (RRD) ring */
+struct emac_rrd_ring {
+	u32			*v_addr;	/* virtual address */
+	dma_addr_t		dma_addr;	/* physical address */
+	size_t			size;		/* length in bytes */
+	unsigned int		count;		/* number of desc in the ring */
+	unsigned int		produce_idx;	/* unused */
+	unsigned int		consume_idx;
+};
+
+/* Rx queue */
+struct emac_rx_queue {
+	struct net_device	*netdev;	/* netdev ring belongs to */
+	struct emac_rrd_ring	rrd;
+	struct emac_rfd_ring	rfd;
+	struct napi_struct	napi;
+	struct emac_irq		*irq;
+
+	u32			intr;
+	u32			produce_mask;
+	u32			process_mask;
+	u32			consume_mask;
+
+	u16			produce_reg;
+	u16			process_reg;
+	u16			consume_reg;
+
+	u8			produce_shift;
+	u8			process_shft;
+	u8			consume_shift;
+};
+
+/* Transimit Packet Descriptor (tpd) ring */
+struct emac_tpd_ring {
+	struct emac_buffer	*tpbuff;
+	u32			*v_addr;	/* virtual address */
+	dma_addr_t		dma_addr;	/* dma address */
+
+	size_t			size;		/* length in bytes */
+	unsigned int		count;		/* number of desc in the ring */
+	unsigned int		produce_idx;
+	unsigned int		consume_idx;
+	unsigned int		last_produce_idx;
+};
+
+/* Tx queue */
+struct emac_tx_queue {
+	struct emac_tpd_ring	tpd;
+
+	u32			produce_mask;
+	u32			consume_mask;
+
+	u16			max_packets;	/* max packets per interrupt */
+	u16			produce_reg;
+	u16			consume_reg;
+
+	u8			produce_shift;
+	u8			consume_shift;
+};
+
+struct emac_adapter;
+
+int  emac_mac_up(struct emac_adapter *adpt);
+void emac_mac_down(struct emac_adapter *adpt);
+void emac_mac_reset(struct emac_adapter *adpt);
+void emac_mac_stop(struct emac_adapter *adpt);
+void emac_mac_mode_config(struct emac_adapter *adpt);
+void emac_mac_rx_process(struct emac_adapter *adpt, struct emac_rx_queue *rx_q,
+			 int *num_pkts, int max_pkts);
+int emac_mac_tx_buf_send(struct emac_adapter *adpt, struct emac_tx_queue *tx_q,
+			 struct sk_buff *skb);
+void emac_mac_tx_process(struct emac_adapter *adpt, struct emac_tx_queue *tx_q);
+void emac_mac_rx_tx_ring_init_all(struct platform_device *pdev,
+				  struct emac_adapter *adpt);
+int  emac_mac_rx_tx_rings_alloc_all(struct emac_adapter *adpt);
+void emac_mac_rx_tx_rings_free_all(struct emac_adapter *adpt);
+void emac_mac_multicast_addr_clear(struct emac_adapter *adpt);
+void emac_mac_multicast_addr_set(struct emac_adapter *adpt, u8 *addr);
+
+#endif /*_EMAC_HW_H_*/