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freebsd-nq/sys/dev/cxgbe/common/t4_hw.h
Navdeep Parhar e682d02e12 Support for TCP DDP (Direct Data Placement) in the T4 TOE module. 
Basically, this is automatic rx zero copy when feasible.  TCP payload is
DMA'd directly into the userspace buffer described by the uio submitted
in soreceive by an application.

- Works with sockets that are being handled by the TCP offload engine
  of a T4 chip (you need t4_tom.ko module loaded after cxgbe, and an
  "ifconfig +toe" on the cxgbe interface).
- Does not require any modification to the application.
- Not enabled by default.  Use hw.t4nex.<X>.toe.ddp="1" to enable it.
2012-08-17 00:49:29 +00:00

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/*-
* Copyright (c) 2011 Chelsio Communications, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*
*/
#ifndef __T4_HW_H
#define __T4_HW_H
#include "osdep.h"
enum {
NCHAN = 4, /* # of HW channels */
MAX_MTU = 9600, /* max MAC MTU, excluding header + FCS */
EEPROMSIZE = 17408, /* Serial EEPROM physical size */
EEPROMVSIZE = 32768, /* Serial EEPROM virtual address space size */
EEPROMPFSIZE = 1024, /* EEPROM writable area size for PFn, n>0 */
RSS_NENTRIES = 2048, /* # of entries in RSS mapping table */
TCB_SIZE = 128, /* TCB size */
NMTUS = 16, /* size of MTU table */
NCCTRL_WIN = 32, /* # of congestion control windows */
NTX_SCHED = 8, /* # of HW Tx scheduling queues */
PM_NSTATS = 5, /* # of PM stats */
MBOX_LEN = 64, /* mailbox size in bytes */
TRACE_LEN = 112, /* length of trace data and mask */
FILTER_OPT_LEN = 36, /* filter tuple width for optional components */
NWOL_PAT = 8, /* # of WoL patterns */
WOL_PAT_LEN = 128, /* length of WoL patterns */
};
enum {
CIM_NUM_IBQ = 6, /* # of CIM IBQs */
CIM_NUM_OBQ = 6, /* # of CIM OBQs */
CIMLA_SIZE = 2048, /* # of 32-bit words in CIM LA */
CIM_PIFLA_SIZE = 64, /* # of 192-bit words in CIM PIF LA */
CIM_MALA_SIZE = 64, /* # of 160-bit words in CIM MA LA */
CIM_IBQ_SIZE = 128, /* # of 128-bit words in a CIM IBQ */
TPLA_SIZE = 128, /* # of 64-bit words in TP LA */
ULPRX_LA_SIZE = 512, /* # of 256-bit words in ULP_RX LA */
};
enum {
SF_PAGE_SIZE = 256, /* serial flash page size */
SF_SEC_SIZE = 64 * 1024, /* serial flash sector size */
};
/* SGE context types */
enum ctxt_type { CTXT_EGRESS, CTXT_INGRESS, CTXT_FLM, CTXT_CNM };
enum { RSP_TYPE_FLBUF, RSP_TYPE_CPL, RSP_TYPE_INTR }; /* response entry types */
enum { MBOX_OWNER_NONE, MBOX_OWNER_FW, MBOX_OWNER_DRV }; /* mailbox owners */
enum {
SGE_MAX_WR_LEN = 512, /* max WR size in bytes */
SGE_CTXT_SIZE = 24, /* size of SGE context */
SGE_NTIMERS = 6, /* # of interrupt holdoff timer values */
SGE_NCOUNTERS = 4, /* # of interrupt packet counter values */
};
struct sge_qstat { /* data written to SGE queue status entries */
volatile __be32 qid;
volatile __be16 cidx;
volatile __be16 pidx;
};
#define S_QSTAT_PIDX 0
#define M_QSTAT_PIDX 0xffff
#define G_QSTAT_PIDX(x) (((x) >> S_QSTAT_PIDX) & M_QSTAT_PIDX)
#define S_QSTAT_CIDX 16
#define M_QSTAT_CIDX 0xffff
#define G_QSTAT_CIDX(x) (((x) >> S_QSTAT_CIDX) & M_QSTAT_CIDX)
/*
* Structure for last 128 bits of response descriptors
*/
struct rsp_ctrl {
__be32 hdrbuflen_pidx;
__be32 pldbuflen_qid;
union {
u8 type_gen;
__be64 last_flit;
} u;
};
#define S_RSPD_NEWBUF 31
#define V_RSPD_NEWBUF(x) ((x) << S_RSPD_NEWBUF)
#define F_RSPD_NEWBUF V_RSPD_NEWBUF(1U)
#define S_RSPD_LEN 0
#define M_RSPD_LEN 0x7fffffff
#define V_RSPD_LEN(x) ((x) << S_RSPD_LEN)
#define G_RSPD_LEN(x) (((x) >> S_RSPD_LEN) & M_RSPD_LEN)
#define S_RSPD_QID S_RSPD_LEN
#define M_RSPD_QID M_RSPD_LEN
#define V_RSPD_QID(x) V_RSPD_LEN(x)
#define G_RSPD_QID(x) G_RSPD_LEN(x)
#define S_RSPD_GEN 7
#define V_RSPD_GEN(x) ((x) << S_RSPD_GEN)
#define F_RSPD_GEN V_RSPD_GEN(1U)
#define S_RSPD_QOVFL 6
#define V_RSPD_QOVFL(x) ((x) << S_RSPD_QOVFL)
#define F_RSPD_QOVFL V_RSPD_QOVFL(1U)
#define S_RSPD_TYPE 4
#define M_RSPD_TYPE 0x3
#define V_RSPD_TYPE(x) ((x) << S_RSPD_TYPE)
#define G_RSPD_TYPE(x) (((x) >> S_RSPD_TYPE) & M_RSPD_TYPE)
/* Rx queue interrupt deferral fields: counter enable and timer index */
#define S_QINTR_CNT_EN 0
#define V_QINTR_CNT_EN(x) ((x) << S_QINTR_CNT_EN)
#define F_QINTR_CNT_EN V_QINTR_CNT_EN(1U)
#define S_QINTR_TIMER_IDX 1
#define M_QINTR_TIMER_IDX 0x7
#define V_QINTR_TIMER_IDX(x) ((x) << S_QINTR_TIMER_IDX)
#define G_QINTR_TIMER_IDX(x) (((x) >> S_QINTR_TIMER_IDX) & M_QINTR_TIMER_IDX)
/* # of pages a pagepod can hold without needing another pagepod */
#define PPOD_PAGES 4U
struct pagepod {
__be64 vld_tid_pgsz_tag_color;
__be64 len_offset;
__be64 rsvd;
__be64 addr[PPOD_PAGES + 1];
};
#define S_PPOD_COLOR 0
#define M_PPOD_COLOR 0x3F
#define V_PPOD_COLOR(x) ((x) << S_PPOD_COLOR)
#define S_PPOD_TAG 6
#define M_PPOD_TAG 0xFFFFFF
#define V_PPOD_TAG(x) ((x) << S_PPOD_TAG)
#define G_PPOD_TAG(x) (((x) >> S_PPOD_TAG) & M_PPOD_TAG)
#define S_PPOD_PGSZ 30
#define M_PPOD_PGSZ 0x3
#define V_PPOD_PGSZ(x) ((x) << S_PPOD_PGSZ)
#define G_PPOD_PGSZ(x) (((x) >> S_PPOD_PGSZ) & M_PPOD_PGSZ)
#define S_PPOD_TID 32
#define M_PPOD_TID 0xFFFFFF
#define V_PPOD_TID(x) ((__u64)(x) << S_PPOD_TID)
#define S_PPOD_VALID 56
#define V_PPOD_VALID(x) ((__u64)(x) << S_PPOD_VALID)
#define F_PPOD_VALID V_PPOD_VALID(1ULL)
#define S_PPOD_LEN 32
#define M_PPOD_LEN 0xFFFFFFFF
#define V_PPOD_LEN(x) ((__u64)(x) << S_PPOD_LEN)
#define S_PPOD_OFST 0
#define M_PPOD_OFST 0xFFFFFFFF
#define V_PPOD_OFST(x) ((x) << S_PPOD_OFST)
/*
* Flash layout.
*/
#define FLASH_START(start) ((start) * SF_SEC_SIZE)
#define FLASH_MAX_SIZE(nsecs) ((nsecs) * SF_SEC_SIZE)
enum {
/*
* Various Expansion-ROM boot images, etc.
*/
FLASH_EXP_ROM_START_SEC = 0,
FLASH_EXP_ROM_NSECS = 6,
FLASH_EXP_ROM_START = FLASH_START(FLASH_EXP_ROM_START_SEC),
FLASH_EXP_ROM_MAX_SIZE = FLASH_MAX_SIZE(FLASH_EXP_ROM_NSECS),
/*
* iSCSI Boot Firmware Table (iBFT) and other driver-related
* parameters ...
*/
FLASH_IBFT_START_SEC = 6,
FLASH_IBFT_NSECS = 1,
FLASH_IBFT_START = FLASH_START(FLASH_IBFT_START_SEC),
FLASH_IBFT_MAX_SIZE = FLASH_MAX_SIZE(FLASH_IBFT_NSECS),
/*
* Boot configuration data.
*/
FLASH_BOOTCFG_START_SEC = 7,
FLASH_BOOTCFG_NSECS = 1,
FLASH_BOOTCFG_START = FLASH_START(FLASH_BOOTCFG_START_SEC),
FLASH_BOOTCFG_MAX_SIZE = FLASH_MAX_SIZE(FLASH_BOOTCFG_NSECS),
/*
* Location of firmware image in FLASH.
*/
FLASH_FW_START_SEC = 8,
FLASH_FW_NSECS = 8,
FLASH_FW_START = FLASH_START(FLASH_FW_START_SEC),
FLASH_FW_MAX_SIZE = FLASH_MAX_SIZE(FLASH_FW_NSECS),
/*
* iSCSI persistent/crash information.
*/
FLASH_ISCSI_CRASH_START_SEC = 29,
FLASH_ISCSI_CRASH_NSECS = 1,
FLASH_ISCSI_CRASH_START = FLASH_START(FLASH_ISCSI_CRASH_START_SEC),
FLASH_ISCSI_CRASH_MAX_SIZE = FLASH_MAX_SIZE(FLASH_ISCSI_CRASH_NSECS),
/*
* FCoE persistent/crash information.
*/
FLASH_FCOE_CRASH_START_SEC = 30,
FLASH_FCOE_CRASH_NSECS = 1,
FLASH_FCOE_CRASH_START = FLASH_START(FLASH_FCOE_CRASH_START_SEC),
FLASH_FCOE_CRASH_MAX_SIZE = FLASH_MAX_SIZE(FLASH_FCOE_CRASH_NSECS),
/*
* Location of Firmware Configuration File in FLASH. Since the FPGA
* "FLASH" is smaller we need to store the Configuration File in a
* different location -- which will overlap the end of the firmware
* image if firmware ever gets that large ...
*/
FLASH_CFG_START_SEC = 31,
FLASH_CFG_NSECS = 1,
FLASH_CFG_START = FLASH_START(FLASH_CFG_START_SEC),
FLASH_CFG_MAX_SIZE = FLASH_MAX_SIZE(FLASH_CFG_NSECS),
FLASH_FPGA_CFG_START_SEC = 15,
FLASH_FPGA_CFG_START = FLASH_START(FLASH_FPGA_CFG_START_SEC),
/*
* Sectors 32-63 are reserved for FLASH failover.
*/
};
#undef FLASH_START
#undef FLASH_MAX_SIZE
#endif /* __T4_HW_H */
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