forked from Minki/linux
a3667aaed5
Signed-off-by: Naresh Kumar Inna <naresh@chelsio.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
513 lines
14 KiB
C
513 lines
14 KiB
C
/*
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* This file is part of the Chelsio FCoE driver for Linux.
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*
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* Copyright (c) 2008-2012 Chelsio Communications, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef __CSIO_WR_H__
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#define __CSIO_WR_H__
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#include <linux/cache.h>
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#include "csio_defs.h"
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#include "t4fw_api.h"
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#include "t4fw_api_stor.h"
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/*
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* SGE register field values.
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*/
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#define X_INGPCIEBOUNDARY_32B 0
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#define X_INGPCIEBOUNDARY_64B 1
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#define X_INGPCIEBOUNDARY_128B 2
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#define X_INGPCIEBOUNDARY_256B 3
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#define X_INGPCIEBOUNDARY_512B 4
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#define X_INGPCIEBOUNDARY_1024B 5
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#define X_INGPCIEBOUNDARY_2048B 6
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#define X_INGPCIEBOUNDARY_4096B 7
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/* GTS register */
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#define X_TIMERREG_COUNTER0 0
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#define X_TIMERREG_COUNTER1 1
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#define X_TIMERREG_COUNTER2 2
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#define X_TIMERREG_COUNTER3 3
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#define X_TIMERREG_COUNTER4 4
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#define X_TIMERREG_COUNTER5 5
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#define X_TIMERREG_RESTART_COUNTER 6
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#define X_TIMERREG_UPDATE_CIDX 7
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/*
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* Egress Context field values
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*/
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#define X_FETCHBURSTMIN_16B 0
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#define X_FETCHBURSTMIN_32B 1
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#define X_FETCHBURSTMIN_64B 2
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#define X_FETCHBURSTMIN_128B 3
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#define X_FETCHBURSTMAX_64B 0
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#define X_FETCHBURSTMAX_128B 1
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#define X_FETCHBURSTMAX_256B 2
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#define X_FETCHBURSTMAX_512B 3
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#define X_HOSTFCMODE_NONE 0
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#define X_HOSTFCMODE_INGRESS_QUEUE 1
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#define X_HOSTFCMODE_STATUS_PAGE 2
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#define X_HOSTFCMODE_BOTH 3
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/*
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* Ingress Context field values
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*/
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#define X_UPDATESCHEDULING_TIMER 0
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#define X_UPDATESCHEDULING_COUNTER_OPTTIMER 1
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#define X_UPDATEDELIVERY_NONE 0
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#define X_UPDATEDELIVERY_INTERRUPT 1
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#define X_UPDATEDELIVERY_STATUS_PAGE 2
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#define X_UPDATEDELIVERY_BOTH 3
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#define X_INTERRUPTDESTINATION_PCIE 0
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#define X_INTERRUPTDESTINATION_IQ 1
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#define X_RSPD_TYPE_FLBUF 0
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#define X_RSPD_TYPE_CPL 1
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#define X_RSPD_TYPE_INTR 2
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/* WR status is at the same position as retval in a CMD header */
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#define csio_wr_status(_wr) \
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(FW_CMD_RETVAL_GET(ntohl(((struct fw_cmd_hdr *)(_wr))->lo)))
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struct csio_hw;
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extern int csio_intr_coalesce_cnt;
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extern int csio_intr_coalesce_time;
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/* Ingress queue params */
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struct csio_iq_params {
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uint8_t iq_start:1;
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uint8_t iq_stop:1;
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uint8_t pfn:3;
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uint8_t vfn;
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uint16_t physiqid;
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uint16_t iqid;
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uint16_t fl0id;
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uint16_t fl1id;
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uint8_t viid;
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uint8_t type;
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uint8_t iqasynch;
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uint8_t reserved4;
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uint8_t iqandst;
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uint8_t iqanus;
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uint8_t iqanud;
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uint16_t iqandstindex;
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uint8_t iqdroprss;
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uint8_t iqpciech;
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uint8_t iqdcaen;
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uint8_t iqdcacpu;
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uint8_t iqintcntthresh;
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uint8_t iqo;
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uint8_t iqcprio;
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uint8_t iqesize;
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uint16_t iqsize;
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uint64_t iqaddr;
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uint8_t iqflintiqhsen;
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uint8_t reserved5;
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uint8_t iqflintcongen;
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uint8_t iqflintcngchmap;
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uint32_t reserved6;
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uint8_t fl0hostfcmode;
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uint8_t fl0cprio;
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uint8_t fl0paden;
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uint8_t fl0packen;
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uint8_t fl0congen;
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uint8_t fl0dcaen;
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uint8_t fl0dcacpu;
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uint8_t fl0fbmin;
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uint8_t fl0fbmax;
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uint8_t fl0cidxfthresho;
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uint8_t fl0cidxfthresh;
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uint16_t fl0size;
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uint64_t fl0addr;
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uint64_t reserved7;
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uint8_t fl1hostfcmode;
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uint8_t fl1cprio;
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uint8_t fl1paden;
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uint8_t fl1packen;
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uint8_t fl1congen;
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uint8_t fl1dcaen;
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uint8_t fl1dcacpu;
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uint8_t fl1fbmin;
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uint8_t fl1fbmax;
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uint8_t fl1cidxfthresho;
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uint8_t fl1cidxfthresh;
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uint16_t fl1size;
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uint64_t fl1addr;
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};
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/* Egress queue params */
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struct csio_eq_params {
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uint8_t pfn;
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uint8_t vfn;
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uint8_t eqstart:1;
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uint8_t eqstop:1;
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uint16_t physeqid;
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uint32_t eqid;
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uint8_t hostfcmode:2;
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uint8_t cprio:1;
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uint8_t pciechn:3;
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uint16_t iqid;
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uint8_t dcaen:1;
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uint8_t dcacpu:5;
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uint8_t fbmin:3;
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uint8_t fbmax:3;
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uint8_t cidxfthresho:1;
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uint8_t cidxfthresh:3;
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uint16_t eqsize;
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uint64_t eqaddr;
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};
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struct csio_dma_buf {
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struct list_head list;
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void *vaddr; /* Virtual address */
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dma_addr_t paddr; /* Physical address */
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uint32_t len; /* Buffer size */
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};
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/* Generic I/O request structure */
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struct csio_ioreq {
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struct csio_sm sm; /* SM, List
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* should be the first member
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*/
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int iq_idx; /* Ingress queue index */
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int eq_idx; /* Egress queue index */
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uint32_t nsge; /* Number of SG elements */
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uint32_t tmo; /* Driver timeout */
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uint32_t datadir; /* Data direction */
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struct csio_dma_buf dma_buf; /* Req/resp DMA buffers */
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uint16_t wr_status; /* WR completion status */
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int16_t drv_status; /* Driver internal status */
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struct csio_lnode *lnode; /* Owner lnode */
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struct csio_rnode *rnode; /* Src/destination rnode */
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void (*io_cbfn) (struct csio_hw *, struct csio_ioreq *);
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/* completion callback */
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void *scratch1; /* Scratch area 1.
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*/
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void *scratch2; /* Scratch area 2. */
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struct list_head gen_list; /* Any list associated with
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* this ioreq.
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*/
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uint64_t fw_handle; /* Unique handle passed
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* to FW
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*/
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uint8_t dcopy; /* Data copy required */
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uint8_t reserved1;
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uint16_t reserved2;
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struct completion cmplobj; /* ioreq completion object */
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} ____cacheline_aligned_in_smp;
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/*
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* Egress status page for egress cidx updates
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*/
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struct csio_qstatus_page {
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__be32 qid;
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__be16 cidx;
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__be16 pidx;
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};
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enum {
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CSIO_MAX_FLBUF_PER_IQWR = 4,
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CSIO_QCREDIT_SZ = 64, /* pidx/cidx increments
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* in bytes
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*/
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CSIO_MAX_QID = 0xFFFF,
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CSIO_MAX_IQ = 128,
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CSIO_SGE_NTIMERS = 6,
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CSIO_SGE_NCOUNTERS = 4,
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CSIO_SGE_FL_SIZE_REGS = 16,
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};
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/* Defines for type */
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enum {
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CSIO_EGRESS = 1,
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CSIO_INGRESS = 2,
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CSIO_FREELIST = 3,
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};
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/*
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* Structure for footer (last 2 flits) of Ingress Queue Entry.
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*/
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struct csio_iqwr_footer {
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__be32 hdrbuflen_pidx;
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__be32 pldbuflen_qid;
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union {
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u8 type_gen;
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__be64 last_flit;
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} u;
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};
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#define IQWRF_NEWBUF (1 << 31)
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#define IQWRF_LEN_GET(x) (((x) >> 0) & 0x7fffffffU)
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#define IQWRF_GEN_SHIFT 7
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#define IQWRF_TYPE_GET(x) (((x) >> 4) & 0x3U)
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/*
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* WR pair:
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* ========
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* A WR can start towards the end of a queue, and then continue at the
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* beginning, since the queue is considered to be circular. This will
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* require a pair of address/len to be passed back to the caller -
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* hence the Work request pair structure.
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*/
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struct csio_wr_pair {
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void *addr1;
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uint32_t size1;
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void *addr2;
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uint32_t size2;
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};
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/*
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* The following structure is used by ingress processing to return the
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* free list buffers to consumers.
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*/
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struct csio_fl_dma_buf {
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struct csio_dma_buf flbufs[CSIO_MAX_FLBUF_PER_IQWR];
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/* Freelist DMA buffers */
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int offset; /* Offset within the
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* first FL buf.
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*/
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uint32_t totlen; /* Total length */
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uint8_t defer_free; /* Free of buffer can
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* deferred
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*/
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};
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/* Data-types */
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typedef void (*iq_handler_t)(struct csio_hw *, void *, uint32_t,
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struct csio_fl_dma_buf *, void *);
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struct csio_iq {
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uint16_t iqid; /* Queue ID */
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uint16_t physiqid; /* Physical Queue ID */
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uint16_t genbit; /* Generation bit,
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* initially set to 1
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*/
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int flq_idx; /* Freelist queue index */
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iq_handler_t iq_intx_handler; /* IQ INTx handler routine */
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};
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struct csio_eq {
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uint16_t eqid; /* Qid */
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uint16_t physeqid; /* Physical Queue ID */
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uint8_t wrap[512]; /* Temp area for q-wrap around*/
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};
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struct csio_fl {
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uint16_t flid; /* Qid */
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uint16_t packen; /* Packing enabled? */
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int offset; /* Offset within FL buf */
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int sreg; /* Size register */
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struct csio_dma_buf *bufs; /* Free list buffer ptr array
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* indexed using flq->cidx/pidx
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*/
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};
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struct csio_qstats {
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uint32_t n_tot_reqs; /* Total no. of Requests */
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uint32_t n_tot_rsps; /* Total no. of responses */
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uint32_t n_qwrap; /* Queue wraps */
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uint32_t n_eq_wr_split; /* Number of split EQ WRs */
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uint32_t n_qentry; /* Queue entry */
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uint32_t n_qempty; /* Queue empty */
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uint32_t n_qfull; /* Queue fulls */
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uint32_t n_rsp_unknown; /* Unknown response type */
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uint32_t n_stray_comp; /* Stray completion intr */
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uint32_t n_flq_refill; /* Number of FL refills */
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};
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/* Queue metadata */
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struct csio_q {
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uint16_t type; /* Type: Ingress/Egress/FL */
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uint16_t pidx; /* producer index */
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uint16_t cidx; /* consumer index */
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uint16_t inc_idx; /* Incremental index */
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uint32_t wr_sz; /* Size of all WRs in this q
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* if fixed
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*/
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void *vstart; /* Base virtual address
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* of queue
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*/
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void *vwrap; /* Virtual end address to
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* wrap around at
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*/
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uint32_t credits; /* Size of queue in credits */
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void *owner; /* Owner */
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union { /* Queue contexts */
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struct csio_iq iq;
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struct csio_eq eq;
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struct csio_fl fl;
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} un;
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dma_addr_t pstart; /* Base physical address of
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* queue
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*/
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uint32_t portid; /* PCIE Channel */
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uint32_t size; /* Size of queue in bytes */
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struct csio_qstats stats; /* Statistics */
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} ____cacheline_aligned_in_smp;
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struct csio_sge {
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uint32_t csio_fl_align; /* Calculated and cached
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* for fast path
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*/
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uint32_t sge_control; /* padding, boundaries,
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* lengths, etc.
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*/
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uint32_t sge_host_page_size; /* Host page size */
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uint32_t sge_fl_buf_size[CSIO_SGE_FL_SIZE_REGS];
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/* free list buffer sizes */
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uint16_t timer_val[CSIO_SGE_NTIMERS];
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uint8_t counter_val[CSIO_SGE_NCOUNTERS];
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};
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/* Work request module */
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struct csio_wrm {
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int num_q; /* Number of queues */
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struct csio_q **q_arr; /* Array of queue pointers
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* allocated dynamically
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* based on configured values
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*/
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uint32_t fw_iq_start; /* Start ID of IQ for this fn*/
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uint32_t fw_eq_start; /* Start ID of EQ for this fn*/
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struct csio_q *intr_map[CSIO_MAX_IQ];
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/* IQ-id to IQ map table. */
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int free_qidx; /* queue idx of free queue */
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struct csio_sge sge; /* SGE params */
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};
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#define csio_get_q(__hw, __idx) ((__hw)->wrm.q_arr[__idx])
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#define csio_q_type(__hw, __idx) ((__hw)->wrm.q_arr[(__idx)]->type)
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#define csio_q_pidx(__hw, __idx) ((__hw)->wrm.q_arr[(__idx)]->pidx)
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#define csio_q_cidx(__hw, __idx) ((__hw)->wrm.q_arr[(__idx)]->cidx)
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#define csio_q_inc_idx(__hw, __idx) ((__hw)->wrm.q_arr[(__idx)]->inc_idx)
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#define csio_q_vstart(__hw, __idx) ((__hw)->wrm.q_arr[(__idx)]->vstart)
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#define csio_q_pstart(__hw, __idx) ((__hw)->wrm.q_arr[(__idx)]->pstart)
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#define csio_q_size(__hw, __idx) ((__hw)->wrm.q_arr[(__idx)]->size)
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#define csio_q_credits(__hw, __idx) ((__hw)->wrm.q_arr[(__idx)]->credits)
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#define csio_q_portid(__hw, __idx) ((__hw)->wrm.q_arr[(__idx)]->portid)
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#define csio_q_wr_sz(__hw, __idx) ((__hw)->wrm.q_arr[(__idx)]->wr_sz)
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#define csio_q_iqid(__hw, __idx) ((__hw)->wrm.q_arr[(__idx)]->un.iq.iqid)
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#define csio_q_physiqid(__hw, __idx) \
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((__hw)->wrm.q_arr[(__idx)]->un.iq.physiqid)
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#define csio_q_iq_flq_idx(__hw, __idx) \
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((__hw)->wrm.q_arr[(__idx)]->un.iq.flq_idx)
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#define csio_q_eqid(__hw, __idx) ((__hw)->wrm.q_arr[(__idx)]->un.eq.eqid)
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#define csio_q_flid(__hw, __idx) ((__hw)->wrm.q_arr[(__idx)]->un.fl.flid)
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#define csio_q_physeqid(__hw, __idx) \
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((__hw)->wrm.q_arr[(__idx)]->un.eq.physeqid)
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#define csio_iq_has_fl(__iq) ((__iq)->un.iq.flq_idx != -1)
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#define csio_q_iq_to_flid(__hw, __iq_idx) \
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csio_q_flid((__hw), (__hw)->wrm.q_arr[(__iq_qidx)]->un.iq.flq_idx)
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#define csio_q_set_intr_map(__hw, __iq_idx, __rel_iq_id) \
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(__hw)->wrm.intr_map[__rel_iq_id] = csio_get_q(__hw, __iq_idx)
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#define csio_q_eq_wrap(__hw, __idx) ((__hw)->wrm.q_arr[(__idx)]->un.eq.wrap)
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struct csio_mb;
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int csio_wr_alloc_q(struct csio_hw *, uint32_t, uint32_t,
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uint16_t, void *, uint32_t, int, iq_handler_t);
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int csio_wr_iq_create(struct csio_hw *, void *, int,
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uint32_t, uint8_t, bool,
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void (*)(struct csio_hw *, struct csio_mb *));
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int csio_wr_eq_create(struct csio_hw *, void *, int, int, uint8_t,
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void (*)(struct csio_hw *, struct csio_mb *));
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int csio_wr_destroy_queues(struct csio_hw *, bool cmd);
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int csio_wr_get(struct csio_hw *, int, uint32_t,
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struct csio_wr_pair *);
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void csio_wr_copy_to_wrp(void *, struct csio_wr_pair *, uint32_t, uint32_t);
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int csio_wr_issue(struct csio_hw *, int, bool);
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int csio_wr_process_iq(struct csio_hw *, struct csio_q *,
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void (*)(struct csio_hw *, void *,
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uint32_t, struct csio_fl_dma_buf *,
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void *),
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void *);
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int csio_wr_process_iq_idx(struct csio_hw *, int,
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void (*)(struct csio_hw *, void *,
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uint32_t, struct csio_fl_dma_buf *,
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void *),
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void *);
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void csio_wr_sge_init(struct csio_hw *);
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int csio_wrm_init(struct csio_wrm *, struct csio_hw *);
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void csio_wrm_exit(struct csio_wrm *, struct csio_hw *);
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#endif /* ifndef __CSIO_WR_H__ */
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