Adding upstream version 6.1.76.upstream/6.1.76

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

1 files changed, 298 insertions, 0 deletions

diff --git a/drivers/net/ethernet/marvell/octeon_ep/octep_tx.h b/drivers/net/ethernet/marvell/octeon_ep/octep_tx.h
new file mode 100644
index 000000000..21e75ff9f
--- /dev/null
+++ b/drivers/net/ethernet/marvell/octeon_ep/octep_tx.h
@@ -0,0 +1,298 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Marvell Octeon EP (EndPoint) Ethernet Driver
+ *
+ * Copyright (C) 2020 Marvell.
+ *
+ */
+
+#ifndef _OCTEP_TX_H_
+#define _OCTEP_TX_H_
+
+#define IQ_SEND_OK          0
+#define IQ_SEND_STOP        1
+#define IQ_SEND_FAILED     -1
+
+#define TX_BUFTYPE_NONE          0
+#define TX_BUFTYPE_NET           1
+#define TX_BUFTYPE_NET_SG        2
+#define NUM_TX_BUFTYPES          3
+
+/* Hardware format for Scatter/Gather list
+ *
+ * 63      48|47     32|31     16|15       0
+ * -----------------------------------------
+ * |  Len 0  |  Len 1  |  Len 2  |  Len 3  |
+ * -----------------------------------------
+ * |                Ptr 0                  |
+ * -----------------------------------------
+ * |                Ptr 1                  |
+ * -----------------------------------------
+ * |                Ptr 2                  |
+ * -----------------------------------------
+ * |                Ptr 3                  |
+ * -----------------------------------------
+ */
+struct octep_tx_sglist_desc {
+	u16 len[4];
+	dma_addr_t dma_ptr[4];
+};
+
+/* Each Scatter/Gather entry sent to hardwar hold four pointers.
+ * So, number of entries required is (MAX_SKB_FRAGS + 1)/4, where '+1'
+ * is for main skb which also goes as a gather buffer to Octeon hardware.
+ * To allocate sufficient SGLIST entries for a packet with max fragments,
+ * align by adding 3 before calcuating max SGLIST entries per packet.
+ */
+#define OCTEP_SGLIST_ENTRIES_PER_PKT ((MAX_SKB_FRAGS + 1 + 3) / 4)
+#define OCTEP_SGLIST_SIZE_PER_PKT \
+	(OCTEP_SGLIST_ENTRIES_PER_PKT * sizeof(struct octep_tx_sglist_desc))
+
+struct octep_tx_buffer {
+	struct sk_buff *skb;
+	dma_addr_t dma;
+	struct octep_tx_sglist_desc *sglist;
+	dma_addr_t sglist_dma;
+	u8 gather;
+};
+
+#define OCTEP_IQ_TXBUFF_INFO_SIZE (sizeof(struct octep_tx_buffer))
+
+/* Hardware interface Tx statistics */
+struct octep_iface_tx_stats {
+	/* Packets dropped due to excessive collisions */
+	u64 xscol;
+
+	/* Packets dropped due to excessive deferral */
+	u64 xsdef;
+
+	/* Packets sent that experienced multiple collisions before successful
+	 * transmission
+	 */
+	u64 mcol;
+
+	/* Packets sent that experienced a single collision before successful
+	 * transmission
+	 */
+	u64 scol;
+
+	/* Total octets sent on the interface */
+	u64 octs;
+
+	/* Total frames sent on the interface */
+	u64 pkts;
+
+	/* Packets sent with an octet count < 64 */
+	u64 hist_lt64;
+
+	/* Packets sent with an octet count == 64 */
+	u64 hist_eq64;
+
+	/* Packets sent with an octet count of 65–127 */
+	u64 hist_65to127;
+
+	/* Packets sent with an octet count of 128–255 */
+	u64 hist_128to255;
+
+	/* Packets sent with an octet count of 256–511 */
+	u64 hist_256to511;
+
+	/* Packets sent with an octet count of 512–1023 */
+	u64 hist_512to1023;
+
+	/* Packets sent with an octet count of 1024-1518 */
+	u64 hist_1024to1518;
+
+	/* Packets sent with an octet count of > 1518 */
+	u64 hist_gt1518;
+
+	/* Packets sent to a broadcast DMAC */
+	u64 bcst;
+
+	/* Packets sent to the multicast DMAC */
+	u64 mcst;
+
+	/* Packets sent that experienced a transmit underflow and were
+	 * truncated
+	 */
+	u64 undflw;
+
+	/* Control/PAUSE packets sent */
+	u64 ctl;
+};
+
+/* Input Queue statistics. Each input queue has four stats fields. */
+struct octep_iq_stats {
+	/* Instructions posted to this queue. */
+	u64 instr_posted;
+
+	/* Instructions copied by hardware for processing. */
+	u64 instr_completed;
+
+	/* Instructions that could not be processed. */
+	u64 instr_dropped;
+
+	/* Bytes sent through this queue. */
+	u64 bytes_sent;
+
+	/* Gather entries sent through this queue. */
+	u64 sgentry_sent;
+
+	/* Number of transmit failures due to TX_BUSY */
+	u64 tx_busy;
+
+	/* Number of times the queue is restarted */
+	u64 restart_cnt;
+};
+
+/* The instruction (input) queue.
+ * The input queue is used to post raw (instruction) mode data or packet
+ * data to Octeon device from the host. Each input queue (up to 4) for
+ * a Octeon device has one such structure to represent it.
+ */
+struct octep_iq {
+	u32 q_no;
+
+	struct octep_device *octep_dev;
+	struct net_device *netdev;
+	struct device *dev;
+	struct netdev_queue *netdev_q;
+
+	/* Index in input ring where driver should write the next packet */
+	u16 host_write_index;
+
+	/* Index in input ring where Octeon is expected to read next packet */
+	u16 octep_read_index;
+
+	/* This index aids in finding the window in the queue where Octeon
+	 * has read the commands.
+	 */
+	u16 flush_index;
+
+	/* Statistics for this input queue. */
+	struct octep_iq_stats stats;
+
+	/* This field keeps track of the instructions pending in this queue. */
+	atomic_t instr_pending;
+
+	/* Pointer to the Virtual Base addr of the input ring. */
+	struct octep_tx_desc_hw *desc_ring;
+
+	/* DMA mapped base address of the input descriptor ring. */
+	dma_addr_t desc_ring_dma;
+
+	/* Info of Tx buffers pending completion. */
+	struct octep_tx_buffer *buff_info;
+
+	/* Base pointer to Scatter/Gather lists for all ring descriptors. */
+	struct octep_tx_sglist_desc *sglist;
+
+	/* DMA mapped addr of Scatter Gather Lists */
+	dma_addr_t sglist_dma;
+
+	/* Octeon doorbell register for the ring. */
+	u8 __iomem *doorbell_reg;
+
+	/* Octeon instruction count register for this ring. */
+	u8 __iomem *inst_cnt_reg;
+
+	/* interrupt level register for this ring */
+	u8 __iomem *intr_lvl_reg;
+
+	/* Maximum no. of instructions in this queue. */
+	u32 max_count;
+	u32 ring_size_mask;
+
+	u32 pkt_in_done;
+	u32 pkts_processed;
+
+	u32 status;
+
+	/* Number of instructions pending to be posted to Octeon. */
+	u32 fill_cnt;
+
+	/* The max. number of instructions that can be held pending by the
+	 * driver before ringing doorbell.
+	 */
+	u32 fill_threshold;
+};
+
+/* Hardware Tx Instruction Header */
+struct octep_instr_hdr {
+	/* Data Len */
+	u64 tlen:16;
+
+	/* Reserved */
+	u64 rsvd:20;
+
+	/* PKIND for SDP */
+	u64 pkind:6;
+
+	/* Front Data size */
+	u64 fsz:6;
+
+	/* No. of entries in gather list */
+	u64 gsz:14;
+
+	/* Gather indicator 1=gather*/
+	u64 gather:1;
+
+	/* Reserved3 */
+	u64 reserved3:1;
+};
+
+/* Hardware Tx completion response header */
+struct octep_instr_resp_hdr {
+	/* Request ID  */
+	u64 rid:16;
+
+	/* PCIe port to use for response */
+	u64 pcie_port:3;
+
+	/* Scatter indicator  1=scatter */
+	u64 scatter:1;
+
+	/* Size of Expected result OR no. of entries in scatter list */
+	u64 rlenssz:14;
+
+	/* Desired destination port for result */
+	u64 dport:6;
+
+	/* Opcode Specific parameters */
+	u64 param:8;
+
+	/* Opcode for the return packet  */
+	u64 opcode:16;
+};
+
+/* 64-byte Tx instruction format.
+ * Format of instruction for a 64-byte mode input queue.
+ *
+ * only first 16-bytes (dptr and ih) are mandatory; rest are optional
+ * and filled by the driver based on firmware/hardware capabilities.
+ * These optional headers together called Front Data and its size is
+ * described by ih->fsz.
+ */
+struct octep_tx_desc_hw {
+	/* Pointer where the input data is available. */
+	u64 dptr;
+
+	/* Instruction Header. */
+	union {
+		struct octep_instr_hdr ih;
+		u64 ih64;
+	};
+
+	/* Pointer where the response for a RAW mode packet will be written
+	 * by Octeon.
+	 */
+	u64 rptr;
+
+	/* Input Instruction Response Header. */
+	struct octep_instr_resp_hdr irh;
+
+	/* Additional headers available in a 64-byte instruction. */
+	u64 exhdr[4];
+};
+
+#define OCTEP_IQ_DESC_SIZE (sizeof(struct octep_tx_desc_hw))
+#endif /* _OCTEP_TX_H_ */