svn commit: r292740 - in head/sys: dev/cxgbe/cxgbei modules/cxgbe modules/cxgbe/cxgbei
Navdeep Parhar
np at FreeBSD.org
Sat Dec 26 06:05:22 UTC 2015
Author: np
Date: Sat Dec 26 06:05:21 2015
New Revision: 292740
URL: https://svnweb.freebsd.org/changeset/base/292740
Log:
cxgbei: Hardware accelerated iSCSI target and initiator for TOE capable
cards supported by cxgbe(4).
On the host side this driver interfaces with the storage stack via the
ICL (iSCSI Common Layer) in the kernel. On the wire the traffic is
standard iSCSI (SCSI over TCP as per RFC 3720/7143 etc.) that
interoperates with all other standards compliant implementations. The
driver is layered on top of the TOE driver (t4_tom) and promotes
connections being handled by t4_tom to iSCSI ULP (Upper Layer Protocol)
mode. Hardware assistance in this mode includes:
- Full TCP processing.
- iSCSI PDU identification and recovery within the TCP stream.
- Header and/or data digest insertion (tx) and verification (rx).
- Zero copy (both tx and rx).
Man page will follow in a separate commit in a couple of weeks.
Relnotes: Yes
Sponsored by: Chelsio Communications
Added:
head/sys/dev/cxgbe/cxgbei/
head/sys/dev/cxgbe/cxgbei/cxgbei.c (contents, props changed)
head/sys/dev/cxgbe/cxgbei/cxgbei.h (contents, props changed)
head/sys/dev/cxgbe/cxgbei/cxgbei_ulp2_ddp.c (contents, props changed)
head/sys/dev/cxgbe/cxgbei/cxgbei_ulp2_ddp.h (contents, props changed)
head/sys/dev/cxgbe/cxgbei/icl_cxgbei.c (contents, props changed)
head/sys/modules/cxgbe/cxgbei/
head/sys/modules/cxgbe/cxgbei/Makefile (contents, props changed)
Modified:
head/sys/modules/cxgbe/Makefile
Added: head/sys/dev/cxgbe/cxgbei/cxgbei.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/dev/cxgbe/cxgbei/cxgbei.c Sat Dec 26 06:05:21 2015 (r292740)
@@ -0,0 +1,1131 @@
+/*-
+ * Copyright (c) 2012 Chelsio Communications, Inc.
+ * All rights reserved.
+ *
+ * Chelsio T5xx iSCSI driver
+ *
+ * Written by: Sreenivasa Honnur <shonnur at chelsio.com>
+ *
+ * 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.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include "opt_inet.h"
+#include "opt_inet6.h"
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/systm.h>
+
+#ifdef TCP_OFFLOAD
+#include <sys/errno.h>
+#include <sys/kthread.h>
+#include <sys/smp.h>
+#include <sys/socket.h>
+#include <sys/socketvar.h>
+#include <sys/mbuf.h>
+#include <sys/lock.h>
+#include <sys/mutex.h>
+#include <sys/condvar.h>
+
+#include <netinet/in.h>
+#include <netinet/in_pcb.h>
+#include <netinet/toecore.h>
+#include <netinet/tcp_var.h>
+#include <netinet/tcp_fsm.h>
+
+#include <cam/scsi/scsi_all.h>
+#include <cam/scsi/scsi_da.h>
+#include <cam/ctl/ctl_io.h>
+#include <cam/ctl/ctl.h>
+#include <cam/ctl/ctl_backend.h>
+#include <cam/ctl/ctl_error.h>
+#include <cam/ctl/ctl_frontend.h>
+#include <cam/ctl/ctl_debug.h>
+#include <cam/ctl/ctl_ha.h>
+#include <cam/ctl/ctl_ioctl.h>
+
+#include <dev/iscsi/icl.h>
+#include <dev/iscsi/iscsi_proto.h>
+#include <dev/iscsi/iscsi_ioctl.h>
+#include <dev/iscsi/iscsi.h>
+#include <cam/ctl/ctl_frontend_iscsi.h>
+
+#include <cam/cam.h>
+#include <cam/cam_ccb.h>
+#include <cam/cam_xpt.h>
+#include <cam/cam_debug.h>
+#include <cam/cam_sim.h>
+#include <cam/cam_xpt_sim.h>
+#include <cam/cam_xpt_periph.h>
+#include <cam/cam_periph.h>
+#include <cam/cam_compat.h>
+#include <cam/scsi/scsi_message.h>
+
+#include "common/common.h"
+#include "common/t4_msg.h"
+#include "common/t4_regs.h" /* for PCIE_MEM_ACCESS */
+#include "tom/t4_tom.h"
+#include "cxgbei.h"
+#include "cxgbei_ulp2_ddp.h"
+
+static int worker_thread_count;
+static struct cxgbei_worker_thread_softc *cwt_softc;
+static struct proc *cxgbei_proc;
+
+/* XXXNP some header instead. */
+struct icl_pdu *icl_cxgbei_new_pdu(int);
+void icl_cxgbei_new_pdu_set_conn(struct icl_pdu *, struct icl_conn *);
+void icl_cxgbei_conn_pdu_free(struct icl_conn *, struct icl_pdu *);
+
+/*
+ * Direct Data Placement -
+ * Directly place the iSCSI Data-In or Data-Out PDU's payload into pre-posted
+ * final destination host-memory buffers based on the Initiator Task Tag (ITT)
+ * in Data-In or Target Task Tag (TTT) in Data-Out PDUs.
+ * The host memory address is programmed into h/w in the format of pagepod
+ * entries.
+ * The location of the pagepod entry is encoded into ddp tag which is used as
+ * the base for ITT/TTT.
+ */
+
+/*
+ * functions to program the pagepod in h/w
+ */
+static void inline
+ppod_set(struct pagepod *ppod,
+ struct cxgbei_ulp2_pagepod_hdr *hdr,
+ struct cxgbei_ulp2_gather_list *gl,
+ unsigned int pidx)
+{
+ int i;
+
+ memcpy(ppod, hdr, sizeof(*hdr));
+
+ for (i = 0; i < (PPOD_PAGES + 1); i++, pidx++) {
+ ppod->addr[i] = pidx < gl->nelem ?
+ cpu_to_be64(gl->dma_sg[pidx].phys_addr) : 0ULL;
+ }
+}
+
+static void inline
+ppod_clear(struct pagepod *ppod)
+{
+ memset(ppod, 0, sizeof(*ppod));
+}
+
+static inline void
+ulp_mem_io_set_hdr(struct adapter *sc, int tid, struct ulp_mem_io *req,
+ unsigned int wr_len, unsigned int dlen,
+ unsigned int pm_addr)
+{
+ struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1);
+
+ INIT_ULPTX_WR(req, wr_len, 0, 0);
+ req->cmd = cpu_to_be32(V_ULPTX_CMD(ULP_TX_MEM_WRITE) |
+ V_ULP_MEMIO_ORDER(is_t4(sc)) |
+ V_T5_ULP_MEMIO_IMM(is_t5(sc)));
+ req->dlen = htonl(V_ULP_MEMIO_DATA_LEN(dlen >> 5));
+ req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16)
+ | V_FW_WR_FLOWID(tid));
+ req->lock_addr = htonl(V_ULP_MEMIO_ADDR(pm_addr >> 5));
+
+ idata->cmd_more = htonl(V_ULPTX_CMD(ULP_TX_SC_IMM));
+ idata->len = htonl(dlen);
+}
+
+#define PPOD_SIZE sizeof(struct pagepod)
+#define ULPMEM_IDATA_MAX_NPPODS 1 /* 256/PPOD_SIZE */
+#define PCIE_MEMWIN_MAX_NPPODS 16 /* 1024/PPOD_SIZE */
+
+static int
+ppod_write_idata(struct cxgbei_data *ci,
+ struct cxgbei_ulp2_pagepod_hdr *hdr,
+ unsigned int idx, unsigned int npods,
+ struct cxgbei_ulp2_gather_list *gl,
+ unsigned int gl_pidx, struct toepcb *toep)
+{
+ u_int dlen = PPOD_SIZE * npods;
+ u_int pm_addr = idx * PPOD_SIZE + ci->llimit;
+ u_int wr_len = roundup(sizeof(struct ulp_mem_io) +
+ sizeof(struct ulptx_idata) + dlen, 16);
+ struct ulp_mem_io *req;
+ struct ulptx_idata *idata;
+ struct pagepod *ppod;
+ u_int i;
+ struct wrqe *wr;
+ struct adapter *sc = toep->vi->pi->adapter;
+
+ wr = alloc_wrqe(wr_len, toep->ctrlq);
+ if (wr == NULL) {
+ CXGBE_UNIMPLEMENTED("ppod_write_idata: alloc_wrqe failure");
+ return (ENOMEM);
+ }
+
+ req = wrtod(wr);
+ memset(req, 0, wr_len);
+ ulp_mem_io_set_hdr(sc, toep->tid, req, wr_len, dlen, pm_addr);
+ idata = (struct ulptx_idata *)(req + 1);
+
+ ppod = (struct pagepod *)(idata + 1);
+ for (i = 0; i < npods; i++, ppod++, gl_pidx += PPOD_PAGES) {
+ if (!hdr) /* clear the pagepod */
+ ppod_clear(ppod);
+ else /* set the pagepod */
+ ppod_set(ppod, hdr, gl, gl_pidx);
+ }
+
+ t4_wrq_tx(sc, wr);
+ return 0;
+}
+
+int
+t4_ddp_set_map(struct cxgbei_data *ci, void *iccp,
+ struct cxgbei_ulp2_pagepod_hdr *hdr, u_int idx, u_int npods,
+ struct cxgbei_ulp2_gather_list *gl, int reply)
+{
+ struct icl_cxgbei_conn *icc = (struct icl_cxgbei_conn *)iccp;
+ struct toepcb *toep = icc->toep;
+ int err;
+ unsigned int pidx = 0, w_npods = 0, cnt;
+
+ /*
+ * on T4, if we use a mix of IMMD and DSGL with ULP_MEM_WRITE,
+ * the order would not be garanteed, so we will stick with IMMD
+ */
+ gl->tid = toep->tid;
+ gl->port_id = toep->vi->pi->port_id;
+ gl->egress_dev = (void *)toep->vi->ifp;
+
+ /* send via immediate data */
+ for (; w_npods < npods; idx += cnt, w_npods += cnt,
+ pidx += PPOD_PAGES) {
+ cnt = npods - w_npods;
+ if (cnt > ULPMEM_IDATA_MAX_NPPODS)
+ cnt = ULPMEM_IDATA_MAX_NPPODS;
+ err = ppod_write_idata(ci, hdr, idx, cnt, gl, pidx, toep);
+ if (err) {
+ printf("%s: ppod_write_idata failed\n", __func__);
+ break;
+ }
+ }
+ return err;
+}
+
+void
+t4_ddp_clear_map(struct cxgbei_data *ci, struct cxgbei_ulp2_gather_list *gl,
+ u_int tag, u_int idx, u_int npods, struct icl_cxgbei_conn *icc)
+{
+ struct toepcb *toep = icc->toep;
+ int err = -1;
+ u_int pidx = 0;
+ u_int w_npods = 0;
+ u_int cnt;
+
+ for (; w_npods < npods; idx += cnt, w_npods += cnt,
+ pidx += PPOD_PAGES) {
+ cnt = npods - w_npods;
+ if (cnt > ULPMEM_IDATA_MAX_NPPODS)
+ cnt = ULPMEM_IDATA_MAX_NPPODS;
+ err = ppod_write_idata(ci, NULL, idx, cnt, gl, 0, toep);
+ if (err)
+ break;
+ }
+}
+
+static int
+cxgbei_map_sg(struct cxgbei_sgl *sgl, struct ccb_scsiio *csio)
+{
+ unsigned int data_len = csio->dxfer_len;
+ unsigned int sgoffset = (uint64_t)csio->data_ptr & PAGE_MASK;
+ unsigned int nsge;
+ unsigned char *sgaddr = csio->data_ptr;
+ unsigned int len = 0;
+
+ nsge = (csio->dxfer_len + sgoffset + PAGE_SIZE - 1) >> PAGE_SHIFT;
+ sgl->sg_addr = sgaddr;
+ sgl->sg_offset = sgoffset;
+ if (data_len < (PAGE_SIZE - sgoffset))
+ len = data_len;
+ else
+ len = PAGE_SIZE - sgoffset;
+
+ sgl->sg_length = len;
+
+ data_len -= len;
+ sgaddr += len;
+ sgl = sgl+1;
+
+ while (data_len > 0) {
+ sgl->sg_addr = sgaddr;
+ len = (data_len < PAGE_SIZE)? data_len: PAGE_SIZE;
+ sgl->sg_length = len;
+ sgaddr += len;
+ data_len -= len;
+ sgl = sgl + 1;
+ }
+
+ return nsge;
+}
+
+static int
+cxgbei_map_sg_tgt(struct cxgbei_sgl *sgl, union ctl_io *io)
+{
+ unsigned int data_len, sgoffset, nsge;
+ unsigned char *sgaddr;
+ unsigned int len = 0, index = 0, ctl_sg_count, i;
+ struct ctl_sg_entry ctl_sg_entry, *ctl_sglist;
+
+ if (io->scsiio.kern_sg_entries > 0) {
+ ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr;
+ ctl_sg_count = io->scsiio.kern_sg_entries;
+ } else {
+ ctl_sglist = &ctl_sg_entry;
+ ctl_sglist->addr = io->scsiio.kern_data_ptr;
+ ctl_sglist->len = io->scsiio.kern_data_len;
+ ctl_sg_count = 1;
+ }
+
+ sgaddr = sgl->sg_addr = ctl_sglist[index].addr;
+ sgoffset = sgl->sg_offset = (uint64_t)sgl->sg_addr & PAGE_MASK;
+ data_len = ctl_sglist[index].len;
+
+ if (data_len < (PAGE_SIZE - sgoffset))
+ len = data_len;
+ else
+ len = PAGE_SIZE - sgoffset;
+
+ sgl->sg_length = len;
+
+ data_len -= len;
+ sgaddr += len;
+ sgl = sgl+1;
+
+ len = 0;
+ for (i = 0; i< ctl_sg_count; i++)
+ len += ctl_sglist[i].len;
+ nsge = (len + sgoffset + PAGE_SIZE -1) >> PAGE_SHIFT;
+ while (data_len > 0) {
+ sgl->sg_addr = sgaddr;
+ len = (data_len < PAGE_SIZE)? data_len: PAGE_SIZE;
+ sgl->sg_length = len;
+ sgaddr += len;
+ data_len -= len;
+ sgl = sgl + 1;
+ if (data_len == 0) {
+ if (index == ctl_sg_count - 1)
+ break;
+ index++;
+ sgaddr = ctl_sglist[index].addr;
+ data_len = ctl_sglist[index].len;
+ }
+ }
+
+ return nsge;
+}
+
+static int
+t4_sk_ddp_tag_reserve(struct cxgbei_data *ci, struct icl_cxgbei_conn *icc,
+ u_int xferlen, struct cxgbei_sgl *sgl, u_int sgcnt, u_int *ddp_tag)
+{
+ struct cxgbei_ulp2_gather_list *gl;
+ int err = -EINVAL;
+ struct toepcb *toep = icc->toep;
+
+ gl = cxgbei_ulp2_ddp_make_gl_from_iscsi_sgvec(xferlen, sgl, sgcnt, ci, 0);
+ if (gl) {
+ err = cxgbei_ulp2_ddp_tag_reserve(ci, icc, toep->tid,
+ &ci->tag_format, ddp_tag, gl, 0, 0);
+ if (err) {
+ cxgbei_ulp2_ddp_release_gl(ci, gl);
+ }
+ }
+
+ return err;
+}
+
+static unsigned int
+cxgbei_task_reserve_itt(struct icl_conn *ic, void **prv,
+ struct ccb_scsiio *scmd, unsigned int *itt)
+{
+ struct icl_cxgbei_conn *icc = ic_to_icc(ic);
+ int xferlen = scmd->dxfer_len;
+ struct cxgbei_task_data *tdata = NULL;
+ struct cxgbei_sgl *sge = NULL;
+ struct toepcb *toep = icc->toep;
+ struct adapter *sc = td_adapter(toep->td);
+ struct cxgbei_data *ci = sc->iscsi_ulp_softc;
+ int err = -1;
+
+ MPASS(icc->icc_signature == CXGBEI_CONN_SIGNATURE);
+
+ tdata = (struct cxgbei_task_data *)*prv;
+ if (xferlen == 0 || tdata == NULL)
+ goto out;
+ if (xferlen < DDP_THRESHOLD)
+ goto out;
+
+ if ((scmd->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN) {
+ tdata->nsge = cxgbei_map_sg(tdata->sgl, scmd);
+ if (tdata->nsge == 0) {
+ CTR1(KTR_CXGBE, "%s: map_sg failed", __func__);
+ return 0;
+ }
+ sge = tdata->sgl;
+
+ tdata->sc_ddp_tag = *itt;
+
+ CTR3(KTR_CXGBE, "%s: *itt:0x%x sc_ddp_tag:0x%x",
+ __func__, *itt, tdata->sc_ddp_tag);
+ if (cxgbei_ulp2_sw_tag_usable(&ci->tag_format,
+ tdata->sc_ddp_tag)) {
+ err = t4_sk_ddp_tag_reserve(ci, icc, scmd->dxfer_len,
+ sge, tdata->nsge, &tdata->sc_ddp_tag);
+ } else {
+ CTR3(KTR_CXGBE,
+ "%s: itt:0x%x sc_ddp_tag:0x%x not usable",
+ __func__, *itt, tdata->sc_ddp_tag);
+ }
+ }
+out:
+ if (err < 0)
+ tdata->sc_ddp_tag =
+ cxgbei_ulp2_set_non_ddp_tag(&ci->tag_format, *itt);
+
+ return tdata->sc_ddp_tag;
+}
+
+static unsigned int
+cxgbei_task_reserve_ttt(struct icl_conn *ic, void **prv, union ctl_io *io,
+ unsigned int *ttt)
+{
+ struct icl_cxgbei_conn *icc = ic_to_icc(ic);
+ struct toepcb *toep = icc->toep;
+ struct adapter *sc = td_adapter(toep->td);
+ struct cxgbei_data *ci = sc->iscsi_ulp_softc;
+ struct cxgbei_task_data *tdata = NULL;
+ int xferlen, err = -1;
+ struct cxgbei_sgl *sge = NULL;
+
+ MPASS(icc->icc_signature == CXGBEI_CONN_SIGNATURE);
+
+ xferlen = (io->scsiio.kern_data_len - io->scsiio.ext_data_filled);
+ tdata = (struct cxgbei_task_data *)*prv;
+ if ((xferlen == 0) || (tdata == NULL))
+ goto out;
+ if (xferlen < DDP_THRESHOLD)
+ goto out;
+ tdata->nsge = cxgbei_map_sg_tgt(tdata->sgl, io);
+ if (tdata->nsge == 0) {
+ CTR1(KTR_CXGBE, "%s: map_sg failed", __func__);
+ return 0;
+ }
+ sge = tdata->sgl;
+
+ tdata->sc_ddp_tag = *ttt;
+ if (cxgbei_ulp2_sw_tag_usable(&ci->tag_format, tdata->sc_ddp_tag)) {
+ err = t4_sk_ddp_tag_reserve(ci, icc, xferlen, sge,
+ tdata->nsge, &tdata->sc_ddp_tag);
+ } else {
+ CTR2(KTR_CXGBE, "%s: sc_ddp_tag:0x%x not usable",
+ __func__, tdata->sc_ddp_tag);
+ }
+out:
+ if (err < 0)
+ tdata->sc_ddp_tag =
+ cxgbei_ulp2_set_non_ddp_tag(&ci->tag_format, *ttt);
+ return tdata->sc_ddp_tag;
+}
+
+static int
+t4_sk_ddp_tag_release(struct icl_cxgbei_conn *icc, unsigned int ddp_tag)
+{
+ struct toepcb *toep = icc->toep;
+ struct adapter *sc = td_adapter(toep->td);
+ struct cxgbei_data *ci = sc->iscsi_ulp_softc;
+
+ cxgbei_ulp2_ddp_tag_release(ci, ddp_tag, icc);
+
+ return (0);
+}
+
+static int
+cxgbei_ddp_init(struct adapter *sc, struct cxgbei_data *ci)
+{
+ int nppods, bits, max_sz, rc;
+ static const u_int pgsz_order[] = {0, 1, 2, 3};
+
+ MPASS(sc->vres.iscsi.size > 0);
+
+ ci->llimit = sc->vres.iscsi.start;
+ ci->ulimit = sc->vres.iscsi.start + sc->vres.iscsi.size - 1;
+ max_sz = G_MAXRXDATA(t4_read_reg(sc, A_TP_PARA_REG2));
+
+ nppods = sc->vres.iscsi.size >> IPPOD_SIZE_SHIFT;
+ if (nppods <= 1024)
+ return (ENXIO);
+
+ bits = fls(nppods);
+ if (bits > IPPOD_IDX_MAX_SIZE)
+ bits = IPPOD_IDX_MAX_SIZE;
+ nppods = (1 << (bits - 1)) - 1;
+
+ rc = bus_dma_tag_create(NULL, 1, 0, BUS_SPACE_MAXADDR,
+ BUS_SPACE_MAXADDR, NULL, NULL, UINT32_MAX , 8, BUS_SPACE_MAXSIZE,
+ BUS_DMA_ALLOCNOW, NULL, NULL, &ci->ulp_ddp_tag);
+ if (rc != 0) {
+ device_printf(sc->dev, "%s: failed to create DMA tag: %u.\n",
+ __func__, rc);
+ return (rc);
+ }
+
+ ci->colors = malloc(nppods * sizeof(char), M_CXGBE, M_NOWAIT | M_ZERO);
+ ci->gl_map = malloc(nppods * sizeof(struct cxgbei_ulp2_gather_list *),
+ M_CXGBE, M_NOWAIT | M_ZERO);
+ if (ci->colors == NULL || ci->gl_map == NULL) {
+ bus_dma_tag_destroy(ci->ulp_ddp_tag);
+ free(ci->colors, M_CXGBE);
+ free(ci->gl_map, M_CXGBE);
+ return (ENOMEM);
+ }
+
+ mtx_init(&ci->map_lock, "ddp lock", NULL, MTX_DEF | MTX_DUPOK);
+ ci->max_txsz = ci->max_rxsz = min(max_sz, ULP2_MAX_PKT_SIZE);
+ ci->nppods = nppods;
+ ci->idx_last = nppods;
+ ci->idx_bits = bits;
+ ci->idx_mask = (1 << bits) - 1;
+ ci->rsvd_tag_mask = (1 << (bits + IPPOD_IDX_SHIFT)) - 1;
+
+ ci->tag_format.sw_bits = bits;
+ ci->tag_format.rsvd_bits = bits;
+ ci->tag_format.rsvd_shift = IPPOD_IDX_SHIFT;
+ ci->tag_format.rsvd_mask = ci->idx_mask;
+
+ t4_iscsi_init(sc, ci->idx_mask << IPPOD_IDX_SHIFT, pgsz_order);
+
+ return (rc);
+}
+
+static int
+do_rx_iscsi_hdr(struct sge_iq *iq, const struct rss_header *rss, struct mbuf *m)
+{
+ struct adapter *sc = iq->adapter;
+ struct cpl_iscsi_hdr *cpl = mtod(m, struct cpl_iscsi_hdr *);
+ u_int tid = GET_TID(cpl);
+ struct toepcb *toep = lookup_tid(sc, tid);
+ struct icl_pdu *ip;
+ struct icl_cxgbei_pdu *icp;
+
+ M_ASSERTPKTHDR(m);
+
+ ip = icl_cxgbei_new_pdu(M_NOWAIT);
+ if (ip == NULL)
+ CXGBE_UNIMPLEMENTED("PDU allocation failure");
+ icp = ip_to_icp(ip);
+ bcopy(mtod(m, caddr_t) + sizeof(*cpl), icp->ip.ip_bhs, sizeof(struct
+ iscsi_bhs));
+ icp->pdu_seq = ntohl(cpl->seq);
+ icp->pdu_flags = SBUF_ULP_FLAG_HDR_RCVD;
+
+ /* This is the start of a new PDU. There should be no old state. */
+ MPASS(toep->ulpcb2 == NULL);
+ toep->ulpcb2 = icp;
+
+#if 0
+ CTR4(KTR_CXGBE, "%s: tid %u, cpl->len hlen %u, m->m_len hlen %u",
+ __func__, tid, ntohs(cpl->len), m->m_len);
+#endif
+
+ m_freem(m);
+ return (0);
+}
+
+static int
+do_rx_iscsi_data(struct sge_iq *iq, const struct rss_header *rss, struct mbuf *m)
+{
+ struct adapter *sc = iq->adapter;
+ struct cpl_iscsi_data *cpl = mtod(m, struct cpl_iscsi_data *);
+ u_int tid = GET_TID(cpl);
+ struct toepcb *toep = lookup_tid(sc, tid);
+ struct icl_cxgbei_pdu *icp = toep->ulpcb2;
+
+ M_ASSERTPKTHDR(m);
+
+ /* Must already have received the header (but not the data). */
+ MPASS(icp != NULL);
+ MPASS(icp->pdu_flags == SBUF_ULP_FLAG_HDR_RCVD);
+ MPASS(icp->ip.ip_data_mbuf == NULL);
+ MPASS(icp->ip.ip_data_len == 0);
+
+ m_adj(m, sizeof(*cpl));
+
+ icp->pdu_flags |= SBUF_ULP_FLAG_DATA_RCVD;
+ icp->ip.ip_data_mbuf = m;
+ icp->ip.ip_data_len = m->m_pkthdr.len;
+
+#if 0
+ CTR4(KTR_CXGBE, "%s: tid %u, cpl->len dlen %u, m->m_len dlen %u",
+ __func__, tid, ntohs(cpl->len), m->m_len);
+#endif
+
+ return (0);
+}
+
+static int
+do_rx_iscsi_ddp(struct sge_iq *iq, const struct rss_header *rss, struct mbuf *m)
+{
+ struct adapter *sc = iq->adapter;
+ const struct cpl_rx_data_ddp *cpl = (const void *)(rss + 1);
+ u_int tid = GET_TID(cpl);
+ struct toepcb *toep = lookup_tid(sc, tid);
+ struct inpcb *inp = toep->inp;
+ struct socket *so;
+ struct sockbuf *sb;
+ struct tcpcb *tp;
+ struct icl_cxgbei_conn *icc;
+ struct icl_conn *ic;
+ struct icl_cxgbei_pdu *icp = toep->ulpcb2;
+ struct icl_pdu *ip;
+ u_int pdu_len, val;
+
+ MPASS(m == NULL);
+
+ /* Must already be assembling a PDU. */
+ MPASS(icp != NULL);
+ MPASS(icp->pdu_flags & SBUF_ULP_FLAG_HDR_RCVD); /* Data is optional. */
+ ip = &icp->ip;
+ icp->pdu_flags |= SBUF_ULP_FLAG_STATUS_RCVD;
+ val = ntohl(cpl->ddpvld);
+ if (val & F_DDP_PADDING_ERR)
+ icp->pdu_flags |= SBUF_ULP_FLAG_PAD_ERROR;
+ if (val & F_DDP_HDRCRC_ERR)
+ icp->pdu_flags |= SBUF_ULP_FLAG_HCRC_ERROR;
+ if (val & F_DDP_DATACRC_ERR)
+ icp->pdu_flags |= SBUF_ULP_FLAG_DCRC_ERROR;
+ if (ip->ip_data_mbuf == NULL) {
+ /* XXXNP: what should ip->ip_data_len be, and why? */
+ icp->pdu_flags |= SBUF_ULP_FLAG_DATA_DDPED;
+ }
+ pdu_len = ntohs(cpl->len); /* includes everything. */
+
+ INP_WLOCK(inp);
+ if (__predict_false(inp->inp_flags & (INP_DROPPED | INP_TIMEWAIT))) {
+ CTR4(KTR_CXGBE, "%s: tid %u, rx (%d bytes), inp_flags 0x%x",
+ __func__, tid, pdu_len, inp->inp_flags);
+ INP_WUNLOCK(inp);
+ icl_cxgbei_conn_pdu_free(NULL, ip);
+#ifdef INVARIANTS
+ toep->ulpcb2 = NULL;
+#endif
+ return (0);
+ }
+
+ tp = intotcpcb(inp);
+ MPASS(icp->pdu_seq == tp->rcv_nxt);
+ MPASS(tp->rcv_wnd >= pdu_len);
+ tp->rcv_nxt += pdu_len;
+ tp->rcv_wnd -= pdu_len;
+ tp->t_rcvtime = ticks;
+
+ /* update rx credits */
+ toep->rx_credits += pdu_len;
+ t4_rcvd(&toep->td->tod, tp); /* XXX: sc->tom_softc.tod */
+
+ so = inp->inp_socket;
+ sb = &so->so_rcv;
+ SOCKBUF_LOCK(sb);
+
+ icc = toep->ulpcb;
+ if (__predict_false(icc == NULL || sb->sb_state & SBS_CANTRCVMORE)) {
+ CTR5(KTR_CXGBE,
+ "%s: tid %u, excess rx (%d bytes), icc %p, sb_state 0x%x",
+ __func__, tid, pdu_len, icc, sb->sb_state);
+ SOCKBUF_UNLOCK(sb);
+ INP_WUNLOCK(inp);
+
+ INP_INFO_RLOCK(&V_tcbinfo);
+ INP_WLOCK(inp);
+ tp = tcp_drop(tp, ECONNRESET);
+ if (tp)
+ INP_WUNLOCK(inp);
+ INP_INFO_RUNLOCK(&V_tcbinfo);
+
+ icl_cxgbei_conn_pdu_free(NULL, ip);
+#ifdef INVARIANTS
+ toep->ulpcb2 = NULL;
+#endif
+ return (0);
+ }
+ MPASS(icc->icc_signature == CXGBEI_CONN_SIGNATURE);
+ ic = &icc->ic;
+ icl_cxgbei_new_pdu_set_conn(ip, ic);
+
+ MPASS(m == NULL); /* was unused, we'll use it now. */
+ m = sbcut_locked(sb, sbused(sb)); /* XXXNP: toep->sb_cc accounting? */
+ if (__predict_false(m != NULL)) {
+ int len = m_length(m, NULL);
+
+ /*
+ * PDUs were received before the tid transitioned to ULP mode.
+ * Convert them to icl_cxgbei_pdus and send them to ICL before
+ * the PDU in icp/ip.
+ */
+ CTR3(KTR_CXGBE, "%s: tid %u, %u bytes in so_rcv", __func__, tid,
+ len);
+
+ /* XXXNP: needs to be rewritten. */
+ if (len == sizeof(struct iscsi_bhs) || len == 4 + sizeof(struct
+ iscsi_bhs)) {
+ struct icl_cxgbei_pdu *icp0;
+ struct icl_pdu *ip0;
+
+ ip0 = icl_cxgbei_new_pdu(M_NOWAIT);
+ icl_cxgbei_new_pdu_set_conn(ip0, ic);
+ if (ip0 == NULL)
+ CXGBE_UNIMPLEMENTED("PDU allocation failure");
+ icp0 = ip_to_icp(ip0);
+ icp0->pdu_seq = 0; /* XXX */
+ icp0->pdu_flags = SBUF_ULP_FLAG_HDR_RCVD |
+ SBUF_ULP_FLAG_STATUS_RCVD;
+ m_copydata(m, 0, sizeof(struct iscsi_bhs), (void *)ip0->ip_bhs);
+ STAILQ_INSERT_TAIL(&icc->rcvd_pdus, ip0, ip_next);
+ }
+ m_freem(m);
+ }
+
+#if 0
+ CTR4(KTR_CXGBE, "%s: tid %u, pdu_len %u, pdu_flags 0x%x",
+ __func__, tid, pdu_len, icp->pdu_flags);
+#endif
+
+ STAILQ_INSERT_TAIL(&icc->rcvd_pdus, ip, ip_next);
+ if ((icc->rx_flags & RXF_ACTIVE) == 0) {
+ struct cxgbei_worker_thread_softc *cwt = &cwt_softc[icc->cwt];
+
+ mtx_lock(&cwt->cwt_lock);
+ icc->rx_flags |= RXF_ACTIVE;
+ TAILQ_INSERT_TAIL(&cwt->rx_head, icc, rx_link);
+ if (cwt->cwt_state == CWT_SLEEPING) {
+ cwt->cwt_state = CWT_RUNNING;
+ cv_signal(&cwt->cwt_cv);
+ }
+ mtx_unlock(&cwt->cwt_lock);
+ }
+ SOCKBUF_UNLOCK(sb);
+ INP_WUNLOCK(inp);
+
+#ifdef INVARIANTS
+ toep->ulpcb2 = NULL;
+#endif
+
+ return (0);
+}
+
+static void
+t4_register_cpl_handler_with_tom(struct adapter *sc)
+{
+
+ t4_register_cpl_handler(sc, CPL_ISCSI_HDR, do_rx_iscsi_hdr);
+ t4_register_cpl_handler(sc, CPL_ISCSI_DATA, do_rx_iscsi_data);
+ t4_register_cpl_handler(sc, CPL_RX_ISCSI_DDP, do_rx_iscsi_ddp);
+}
+
+static void
+t4_unregister_cpl_handler_with_tom(struct adapter *sc)
+{
+
+ t4_register_cpl_handler(sc, CPL_ISCSI_HDR, NULL);
+ t4_register_cpl_handler(sc, CPL_ISCSI_DATA, NULL);
+ t4_register_cpl_handler(sc, CPL_RX_ISCSI_DDP, NULL);
+}
+
+/* initiator */
+void
+cxgbei_conn_task_reserve_itt(void *conn, void **prv,
+ void *scmd, unsigned int *itt)
+{
+ unsigned int tag;
+ tag = cxgbei_task_reserve_itt(conn, prv, scmd, itt);
+ if (tag)
+ *itt = htonl(tag);
+ return;
+}
+
+/* target */
+void
+cxgbei_conn_transfer_reserve_ttt(void *conn, void **prv,
+ void *scmd, unsigned int *ttt)
+{
+ unsigned int tag;
+ tag = cxgbei_task_reserve_ttt(conn, prv, scmd, ttt);
+ if (tag)
+ *ttt = htonl(tag);
+ return;
+}
+
+void
+cxgbei_cleanup_task(void *conn, void *ofld_priv)
+{
+ struct icl_conn *ic = (struct icl_conn *)conn;
+ struct icl_cxgbei_conn *icc = ic_to_icc(ic);
+ struct cxgbei_task_data *tdata = ofld_priv;
+ struct adapter *sc = icc->sc;
+ struct cxgbei_data *ci = sc->iscsi_ulp_softc;
+
+ MPASS(icc->icc_signature == CXGBEI_CONN_SIGNATURE);
+ MPASS(tdata != NULL);
+
+ if (cxgbei_ulp2_is_ddp_tag(&ci->tag_format, tdata->sc_ddp_tag))
+ t4_sk_ddp_tag_release(icc, tdata->sc_ddp_tag);
+ memset(tdata, 0, sizeof(*tdata));
+}
+
+static int
+cxgbei_activate(struct adapter *sc)
+{
+ struct cxgbei_data *ci;
+ int rc;
+
+ ASSERT_SYNCHRONIZED_OP(sc);
+
+ if (uld_active(sc, ULD_ISCSI)) {
+ KASSERT(0, ("%s: iSCSI offload already enabled on adapter %p",
+ __func__, sc));
+ return (0);
+ }
+
+ if (sc->iscsicaps == 0 || sc->vres.iscsi.size == 0) {
+ device_printf(sc->dev,
+ "not iSCSI offload capable, or capability disabled.\n");
+ return (ENOSYS);
+ }
+
+ /* per-adapter softc for iSCSI */
+ ci = malloc(sizeof(*ci), M_CXGBE, M_ZERO | M_NOWAIT);
+ if (ci == NULL)
+ return (ENOMEM);
+
+ rc = cxgbei_ddp_init(sc, ci);
+ if (rc != 0) {
+ free(ci, M_CXGBE);
+ return (rc);
+ }
+
+ t4_register_cpl_handler_with_tom(sc);
+ sc->iscsi_ulp_softc = ci;
+
+ return (0);
+}
+
+static int
+cxgbei_deactivate(struct adapter *sc)
+{
+
+ ASSERT_SYNCHRONIZED_OP(sc);
+
+ if (sc->iscsi_ulp_softc != NULL) {
+ cxgbei_ddp_cleanup(sc->iscsi_ulp_softc);
+ t4_unregister_cpl_handler_with_tom(sc);
+ free(sc->iscsi_ulp_softc, M_CXGBE);
+ sc->iscsi_ulp_softc = NULL;
+ }
+
+ return (0);
+}
+
+static void
+cxgbei_activate_all(struct adapter *sc, void *arg __unused)
+{
+
+ if (begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4isact") != 0)
+ return;
+
+ /* Activate iSCSI if any port on this adapter has IFCAP_TOE enabled. */
+ if (sc->offload_map && !uld_active(sc, ULD_ISCSI))
+ (void) t4_activate_uld(sc, ULD_ISCSI);
+
+ end_synchronized_op(sc, 0);
+}
+
+static void
+cxgbei_deactivate_all(struct adapter *sc, void *arg __unused)
+{
+
+ if (begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4isdea") != 0)
+ return;
+
+ if (uld_active(sc, ULD_ISCSI))
+ (void) t4_deactivate_uld(sc, ULD_ISCSI);
+
+ end_synchronized_op(sc, 0);
+}
+
+static struct uld_info cxgbei_uld_info = {
+ .uld_id = ULD_ISCSI,
+ .activate = cxgbei_activate,
+ .deactivate = cxgbei_deactivate,
+};
+
+static void
+cwt_main(void *arg)
+{
+ struct cxgbei_worker_thread_softc *cwt = arg;
+ struct icl_cxgbei_conn *icc = NULL;
+ struct icl_conn *ic;
+ struct icl_pdu *ip;
+ struct sockbuf *sb;
+ STAILQ_HEAD(, icl_pdu) rx_pdus = STAILQ_HEAD_INITIALIZER(rx_pdus);
+
+ MPASS(cwt != NULL);
+
+ mtx_lock(&cwt->cwt_lock);
+ MPASS(cwt->cwt_state == 0);
+ cwt->cwt_state = CWT_RUNNING;
+ cv_signal(&cwt->cwt_cv);
+
+ while (__predict_true(cwt->cwt_state != CWT_STOP)) {
+ cwt->cwt_state = CWT_RUNNING;
+ while ((icc = TAILQ_FIRST(&cwt->rx_head)) != NULL) {
+ TAILQ_REMOVE(&cwt->rx_head, icc, rx_link);
+ mtx_unlock(&cwt->cwt_lock);
+
+ ic = &icc->ic;
+ sb = &ic->ic_socket->so_rcv;
+
+ SOCKBUF_LOCK(sb);
+ MPASS(icc->rx_flags & RXF_ACTIVE);
+ if (__predict_true(!(sb->sb_state & SBS_CANTRCVMORE))) {
+ MPASS(STAILQ_EMPTY(&rx_pdus));
+ STAILQ_SWAP(&icc->rcvd_pdus, &rx_pdus, icl_pdu);
+ SOCKBUF_UNLOCK(sb);
+
+ /* Hand over PDUs to ICL. */
+ while ((ip = STAILQ_FIRST(&rx_pdus)) != NULL) {
+ STAILQ_REMOVE_HEAD(&rx_pdus, ip_next);
+ ic->ic_receive(ip);
+ }
+
+ SOCKBUF_LOCK(sb);
+ MPASS(STAILQ_EMPTY(&rx_pdus));
+ }
+ MPASS(icc->rx_flags & RXF_ACTIVE);
+ if (STAILQ_EMPTY(&icc->rcvd_pdus) ||
+ __predict_false(sb->sb_state & SBS_CANTRCVMORE)) {
+ icc->rx_flags &= ~RXF_ACTIVE;
+ } else {
+ /*
+ * More PDUs were received while we were busy
+ * handing over the previous batch to ICL.
+ * Re-add this connection to the end of the
+ * queue.
+ */
+ mtx_lock(&cwt->cwt_lock);
+ TAILQ_INSERT_TAIL(&cwt->rx_head, icc,
+ rx_link);
+ mtx_unlock(&cwt->cwt_lock);
+ }
+ SOCKBUF_UNLOCK(sb);
+
+ mtx_lock(&cwt->cwt_lock);
+ }
+
+ /* Inner loop doesn't check for CWT_STOP, do that first. */
+ if (__predict_false(cwt->cwt_state == CWT_STOP))
+ break;
+ cwt->cwt_state = CWT_SLEEPING;
+ cv_wait(&cwt->cwt_cv, &cwt->cwt_lock);
+ }
+
+ MPASS(TAILQ_FIRST(&cwt->rx_head) == NULL);
+ mtx_assert(&cwt->cwt_lock, MA_OWNED);
+ cwt->cwt_state = CWT_STOPPED;
+ cv_signal(&cwt->cwt_cv);
+ mtx_unlock(&cwt->cwt_lock);
+ kthread_exit();
+}
+
+static int
+start_worker_threads(void)
+{
+ int i, rc;
+ struct cxgbei_worker_thread_softc *cwt;
+
+ worker_thread_count = min(mp_ncpus, 32);
+ cwt_softc = malloc(worker_thread_count * sizeof(*cwt), M_CXGBE,
+ M_WAITOK | M_ZERO);
+
+ MPASS(cxgbei_proc == NULL);
+ for (i = 0, cwt = &cwt_softc[0]; i < worker_thread_count; i++, cwt++) {
+ mtx_init(&cwt->cwt_lock, "cwt lock", NULL, MTX_DEF);
+ cv_init(&cwt->cwt_cv, "cwt cv");
+ TAILQ_INIT(&cwt->rx_head);
+ rc = kproc_kthread_add(cwt_main, cwt, &cxgbei_proc, NULL, 0, 0,
+ "cxgbei", "%d", i);
+ if (rc != 0) {
+ printf("cxgbei: failed to start thread #%d/%d (%d)\n",
+ i + 1, worker_thread_count, rc);
+ mtx_destroy(&cwt->cwt_lock);
+ cv_destroy(&cwt->cwt_cv);
+ bzero(&cwt, sizeof(*cwt));
+ if (i == 0) {
+ free(cwt_softc, M_CXGBE);
+ worker_thread_count = 0;
+
*** DIFF OUTPUT TRUNCATED AT 1000 LINES ***
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