[SCSI] cnic: Add new Broadcom CNIC driver.
The CNIC driver controls BNX2 hardware rings and resources used by
iSCSI. Most hardware resources for iSCSI are separate from those
used for ethernet networking.
iSCSI uses a separate MAC address and IP address. The CNIC driver
creates a UIO interface to handle the non-offloaded packets such as
ARP, etc in userspace.
Signed-off-by: Michael Chan <mchan@broadcom.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
diff --git a/drivers/net/cnic.h b/drivers/net/cnic.h
new file mode 100644
index 0000000..5192d4a
--- /dev/null
+++ b/drivers/net/cnic.h
@@ -0,0 +1,299 @@
+/* cnic.h: Broadcom CNIC core network driver.
+ *
+ * Copyright (c) 2006-2009 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation.
+ *
+ */
+
+
+#ifndef CNIC_H
+#define CNIC_H
+
+#define KWQ_PAGE_CNT 4
+#define KCQ_PAGE_CNT 16
+
+#define KWQ_CID 24
+#define KCQ_CID 25
+
+/*
+ * krnlq_context definition
+ */
+#define L5_KRNLQ_FLAGS 0x00000000
+#define L5_KRNLQ_SIZE 0x00000000
+#define L5_KRNLQ_TYPE 0x00000000
+#define KRNLQ_FLAGS_PG_SZ (0xf<<0)
+#define KRNLQ_FLAGS_PG_SZ_256 (0<<0)
+#define KRNLQ_FLAGS_PG_SZ_512 (1<<0)
+#define KRNLQ_FLAGS_PG_SZ_1K (2<<0)
+#define KRNLQ_FLAGS_PG_SZ_2K (3<<0)
+#define KRNLQ_FLAGS_PG_SZ_4K (4<<0)
+#define KRNLQ_FLAGS_PG_SZ_8K (5<<0)
+#define KRNLQ_FLAGS_PG_SZ_16K (6<<0)
+#define KRNLQ_FLAGS_PG_SZ_32K (7<<0)
+#define KRNLQ_FLAGS_PG_SZ_64K (8<<0)
+#define KRNLQ_FLAGS_PG_SZ_128K (9<<0)
+#define KRNLQ_FLAGS_PG_SZ_256K (10<<0)
+#define KRNLQ_FLAGS_PG_SZ_512K (11<<0)
+#define KRNLQ_FLAGS_PG_SZ_1M (12<<0)
+#define KRNLQ_FLAGS_PG_SZ_2M (13<<0)
+#define KRNLQ_FLAGS_QE_SELF_SEQ (1<<15)
+#define KRNLQ_SIZE_TYPE_SIZE ((((0x28 + 0x1f) & ~0x1f) / 0x20) << 16)
+#define KRNLQ_TYPE_TYPE (0xf<<28)
+#define KRNLQ_TYPE_TYPE_EMPTY (0<<28)
+#define KRNLQ_TYPE_TYPE_KRNLQ (6<<28)
+
+#define L5_KRNLQ_HOST_QIDX 0x00000004
+#define L5_KRNLQ_HOST_FW_QIDX 0x00000008
+#define L5_KRNLQ_NX_QE_SELF_SEQ 0x0000000c
+#define L5_KRNLQ_QE_SELF_SEQ_MAX 0x0000000c
+#define L5_KRNLQ_NX_QE_HADDR_HI 0x00000010
+#define L5_KRNLQ_NX_QE_HADDR_LO 0x00000014
+#define L5_KRNLQ_PGTBL_PGIDX 0x00000018
+#define L5_KRNLQ_NX_PG_QIDX 0x00000018
+#define L5_KRNLQ_PGTBL_NPAGES 0x0000001c
+#define L5_KRNLQ_QIDX_INCR 0x0000001c
+#define L5_KRNLQ_PGTBL_HADDR_HI 0x00000020
+#define L5_KRNLQ_PGTBL_HADDR_LO 0x00000024
+
+#define BNX2_PG_CTX_MAP 0x1a0034
+#define BNX2_ISCSI_CTX_MAP 0x1a0074
+
+struct cnic_redirect_entry {
+ struct dst_entry *old_dst;
+ struct dst_entry *new_dst;
+};
+
+#define MAX_COMPLETED_KCQE 64
+
+#define MAX_CNIC_L5_CONTEXT 256
+
+#define MAX_CM_SK_TBL_SZ MAX_CNIC_L5_CONTEXT
+
+#define MAX_ISCSI_TBL_SZ 256
+
+#define CNIC_LOCAL_PORT_MIN 60000
+#define CNIC_LOCAL_PORT_MAX 61000
+#define CNIC_LOCAL_PORT_RANGE (CNIC_LOCAL_PORT_MAX - CNIC_LOCAL_PORT_MIN)
+
+#define KWQE_CNT (BCM_PAGE_SIZE / sizeof(struct kwqe))
+#define KCQE_CNT (BCM_PAGE_SIZE / sizeof(struct kcqe))
+#define MAX_KWQE_CNT (KWQE_CNT - 1)
+#define MAX_KCQE_CNT (KCQE_CNT - 1)
+
+#define MAX_KWQ_IDX ((KWQ_PAGE_CNT * KWQE_CNT) - 1)
+#define MAX_KCQ_IDX ((KCQ_PAGE_CNT * KCQE_CNT) - 1)
+
+#define KWQ_PG(x) (((x) & ~MAX_KWQE_CNT) >> (BCM_PAGE_BITS - 5))
+#define KWQ_IDX(x) ((x) & MAX_KWQE_CNT)
+
+#define KCQ_PG(x) (((x) & ~MAX_KCQE_CNT) >> (BCM_PAGE_BITS - 5))
+#define KCQ_IDX(x) ((x) & MAX_KCQE_CNT)
+
+#define BNX2X_NEXT_KCQE(x) (((x) & (MAX_KCQE_CNT - 1)) == \
+ (MAX_KCQE_CNT - 1)) ? \
+ (x) + 2 : (x) + 1
+
+#define BNX2X_KWQ_DATA_PG(cp, x) ((x) / (cp)->kwq_16_data_pp)
+#define BNX2X_KWQ_DATA_IDX(cp, x) ((x) % (cp)->kwq_16_data_pp)
+#define BNX2X_KWQ_DATA(cp, x) \
+ &(cp)->kwq_16_data[BNX2X_KWQ_DATA_PG(cp, x)][BNX2X_KWQ_DATA_IDX(cp, x)]
+
+#define DEF_IPID_COUNT 0xc001
+
+#define DEF_KA_TIMEOUT 10000
+#define DEF_KA_INTERVAL 300000
+#define DEF_KA_MAX_PROBE_COUNT 3
+#define DEF_TOS 0
+#define DEF_TTL 0xfe
+#define DEF_SND_SEQ_SCALE 0
+#define DEF_RCV_BUF 0xffff
+#define DEF_SND_BUF 0xffff
+#define DEF_SEED 0
+#define DEF_MAX_RT_TIME 500
+#define DEF_MAX_DA_COUNT 2
+#define DEF_SWS_TIMER 1000
+#define DEF_MAX_CWND 0xffff
+
+struct cnic_ctx {
+ u32 cid;
+ void *ctx;
+ dma_addr_t mapping;
+};
+
+#define BNX2_MAX_CID 0x2000
+
+struct cnic_dma {
+ int num_pages;
+ void **pg_arr;
+ dma_addr_t *pg_map_arr;
+ int pgtbl_size;
+ u32 *pgtbl;
+ dma_addr_t pgtbl_map;
+};
+
+struct cnic_id_tbl {
+ spinlock_t lock;
+ u32 start;
+ u32 max;
+ u32 next;
+ unsigned long *table;
+};
+
+#define CNIC_KWQ16_DATA_SIZE 128
+
+struct kwqe_16_data {
+ u8 data[CNIC_KWQ16_DATA_SIZE];
+};
+
+struct cnic_iscsi {
+ struct cnic_dma task_array_info;
+ struct cnic_dma r2tq_info;
+ struct cnic_dma hq_info;
+};
+
+struct cnic_context {
+ u32 cid;
+ struct kwqe_16_data *kwqe_data;
+ dma_addr_t kwqe_data_mapping;
+ wait_queue_head_t waitq;
+ int wait_cond;
+ unsigned long timestamp;
+ u32 ctx_flags;
+#define CTX_FL_OFFLD_START 0x00000001
+ u8 ulp_proto_id;
+ union {
+ struct cnic_iscsi *iscsi;
+ } proto;
+};
+
+struct cnic_local {
+
+ spinlock_t cnic_ulp_lock;
+ void *ulp_handle[MAX_CNIC_ULP_TYPE];
+ unsigned long ulp_flags[MAX_CNIC_ULP_TYPE];
+#define ULP_F_INIT 0
+#define ULP_F_START 1
+ struct cnic_ulp_ops *ulp_ops[MAX_CNIC_ULP_TYPE];
+
+ /* protected by ulp_lock */
+ u32 cnic_local_flags;
+#define CNIC_LCL_FL_KWQ_INIT 0x00000001
+
+ struct cnic_dev *dev;
+
+ struct cnic_eth_dev *ethdev;
+
+ void *l2_ring;
+ dma_addr_t l2_ring_map;
+ int l2_ring_size;
+ int l2_rx_ring_size;
+
+ void *l2_buf;
+ dma_addr_t l2_buf_map;
+ int l2_buf_size;
+ int l2_single_buf_size;
+
+ u16 *rx_cons_ptr;
+ u16 *tx_cons_ptr;
+ u16 rx_cons;
+ u16 tx_cons;
+
+ u32 kwq_cid_addr;
+ u32 kcq_cid_addr;
+
+ struct cnic_dma kwq_info;
+ struct kwqe **kwq;
+
+ struct cnic_dma kwq_16_data_info;
+
+ u16 max_kwq_idx;
+
+ u16 kwq_prod_idx;
+ u32 kwq_io_addr;
+
+ u16 *kwq_con_idx_ptr;
+ u16 kwq_con_idx;
+
+ struct cnic_dma kcq_info;
+ struct kcqe **kcq;
+
+ u16 kcq_prod_idx;
+ u32 kcq_io_addr;
+
+ void *status_blk;
+ struct status_block_msix *bnx2_status_blk;
+ struct host_status_block *bnx2x_status_blk;
+
+ u32 status_blk_num;
+ u32 int_num;
+ u32 last_status_idx;
+ struct tasklet_struct cnic_irq_task;
+
+ struct kcqe *completed_kcq[MAX_COMPLETED_KCQE];
+
+ struct cnic_sock *csk_tbl;
+ struct cnic_id_tbl csk_port_tbl;
+
+ struct cnic_dma conn_buf_info;
+ struct cnic_dma gbl_buf_info;
+
+ struct cnic_iscsi *iscsi_tbl;
+ struct cnic_context *ctx_tbl;
+ struct cnic_id_tbl cid_tbl;
+ int max_iscsi_conn;
+ atomic_t iscsi_conn;
+
+ /* per connection parameters */
+ int num_iscsi_tasks;
+ int num_ccells;
+ int task_array_size;
+ int r2tq_size;
+ int hq_size;
+ int num_cqs;
+
+ struct cnic_ctx *ctx_arr;
+ int ctx_blks;
+ int ctx_blk_size;
+ int cids_per_blk;
+
+ u32 chip_id;
+ int func;
+ u32 shmem_base;
+
+ u32 uio_dev;
+ struct uio_info *cnic_uinfo;
+
+ struct cnic_ops *cnic_ops;
+ int (*start_hw)(struct cnic_dev *);
+ void (*stop_hw)(struct cnic_dev *);
+ void (*setup_pgtbl)(struct cnic_dev *,
+ struct cnic_dma *);
+ int (*alloc_resc)(struct cnic_dev *);
+ void (*free_resc)(struct cnic_dev *);
+ int (*start_cm)(struct cnic_dev *);
+ void (*stop_cm)(struct cnic_dev *);
+ void (*enable_int)(struct cnic_dev *);
+ void (*disable_int_sync)(struct cnic_dev *);
+ void (*ack_int)(struct cnic_dev *);
+ void (*close_conn)(struct cnic_sock *, u32 opcode);
+ u16 (*next_idx)(u16);
+ u16 (*hw_idx)(u16);
+};
+
+struct bnx2x_bd_chain_next {
+ u32 addr_lo;
+ u32 addr_hi;
+ u8 reserved[8];
+};
+
+#define ISCSI_RAMROD_CMD_ID_UPDATE_CONN (ISCSI_KCQE_OPCODE_UPDATE_CONN)
+#define ISCSI_RAMROD_CMD_ID_INIT (ISCSI_KCQE_OPCODE_INIT)
+
+#define CDU_REGION_NUMBER_XCM_AG 2
+#define CDU_REGION_NUMBER_UCM_AG 4
+
+#endif
+