summaryrefslogtreecommitdiff
path: root/drivers/scsi/cxgb3i/cxgb3i_offload.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/scsi/cxgb3i/cxgb3i_offload.c')
-rw-r--r--drivers/scsi/cxgb3i/cxgb3i_offload.c1944
1 files changed, 0 insertions, 1944 deletions
diff --git a/drivers/scsi/cxgb3i/cxgb3i_offload.c b/drivers/scsi/cxgb3i/cxgb3i_offload.c
deleted file mode 100644
index 3ee13cf9556b..000000000000
--- a/drivers/scsi/cxgb3i/cxgb3i_offload.c
+++ /dev/null
@@ -1,1944 +0,0 @@
-/*
- * cxgb3i_offload.c: Chelsio S3xx iscsi offloaded tcp connection management
- *
- * Copyright (C) 2003-2008 Chelsio Communications. All rights reserved.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the LICENSE file included in this
- * release for licensing terms and conditions.
- *
- * Written by: Dimitris Michailidis (dm@chelsio.com)
- * Karen Xie (kxie@chelsio.com)
- */
-
-#include <linux/if_vlan.h>
-#include <linux/slab.h>
-#include <linux/version.h>
-
-#include "cxgb3_defs.h"
-#include "cxgb3_ctl_defs.h"
-#include "firmware_exports.h"
-#include "cxgb3i_offload.h"
-#include "cxgb3i_pdu.h"
-#include "cxgb3i_ddp.h"
-
-#ifdef __DEBUG_C3CN_CONN__
-#define c3cn_conn_debug cxgb3i_log_debug
-#else
-#define c3cn_conn_debug(fmt...)
-#endif
-
-#ifdef __DEBUG_C3CN_TX__
-#define c3cn_tx_debug cxgb3i_log_debug
-#else
-#define c3cn_tx_debug(fmt...)
-#endif
-
-#ifdef __DEBUG_C3CN_RX__
-#define c3cn_rx_debug cxgb3i_log_debug
-#else
-#define c3cn_rx_debug(fmt...)
-#endif
-
-/*
- * module parameters releated to offloaded iscsi connection
- */
-static int cxgb3_rcv_win = 256 * 1024;
-module_param(cxgb3_rcv_win, int, 0644);
-MODULE_PARM_DESC(cxgb3_rcv_win, "TCP receive window in bytes (default=256KB)");
-
-static int cxgb3_snd_win = 128 * 1024;
-module_param(cxgb3_snd_win, int, 0644);
-MODULE_PARM_DESC(cxgb3_snd_win, "TCP send window in bytes (default=128KB)");
-
-static int cxgb3_rx_credit_thres = 10 * 1024;
-module_param(cxgb3_rx_credit_thres, int, 0644);
-MODULE_PARM_DESC(rx_credit_thres,
- "RX credits return threshold in bytes (default=10KB)");
-
-static unsigned int cxgb3_max_connect = 8 * 1024;
-module_param(cxgb3_max_connect, uint, 0644);
-MODULE_PARM_DESC(cxgb3_max_connect, "Max. # of connections (default=8092)");
-
-static unsigned int cxgb3_sport_base = 20000;
-module_param(cxgb3_sport_base, uint, 0644);
-MODULE_PARM_DESC(cxgb3_sport_base, "starting port number (default=20000)");
-
-/*
- * cxgb3i tcp connection data(per adapter) list
- */
-static LIST_HEAD(cdata_list);
-static DEFINE_RWLOCK(cdata_rwlock);
-
-static int c3cn_push_tx_frames(struct s3_conn *c3cn, int req_completion);
-static void c3cn_release_offload_resources(struct s3_conn *c3cn);
-
-/*
- * iscsi source port management
- *
- * Find a free source port in the port allocation map. We use a very simple
- * rotor scheme to look for the next free port.
- *
- * If a source port has been specified make sure that it doesn't collide with
- * our normal source port allocation map. If it's outside the range of our
- * allocation/deallocation scheme just let them use it.
- *
- * If the source port is outside our allocation range, the caller is
- * responsible for keeping track of their port usage.
- */
-static int c3cn_get_port(struct s3_conn *c3cn, struct cxgb3i_sdev_data *cdata)
-{
- unsigned int start;
- int idx;
-
- if (!cdata)
- goto error_out;
-
- if (c3cn->saddr.sin_port) {
- cxgb3i_log_error("connect, sin_port NON-ZERO %u.\n",
- c3cn->saddr.sin_port);
- return -EADDRINUSE;
- }
-
- spin_lock_bh(&cdata->lock);
- start = idx = cdata->sport_next;
- do {
- if (++idx >= cxgb3_max_connect)
- idx = 0;
- if (!cdata->sport_conn[idx]) {
- c3cn->saddr.sin_port = htons(cxgb3_sport_base + idx);
- cdata->sport_next = idx;
- cdata->sport_conn[idx] = c3cn;
- spin_unlock_bh(&cdata->lock);
-
- c3cn_conn_debug("%s reserve port %u.\n",
- cdata->cdev->name,
- cxgb3_sport_base + idx);
- return 0;
- }
- } while (idx != start);
- spin_unlock_bh(&cdata->lock);
-
-error_out:
- return -EADDRNOTAVAIL;
-}
-
-static void c3cn_put_port(struct s3_conn *c3cn)
-{
- if (!c3cn->cdev)
- return;
-
- if (c3cn->saddr.sin_port) {
- struct cxgb3i_sdev_data *cdata = CXGB3_SDEV_DATA(c3cn->cdev);
- int idx = ntohs(c3cn->saddr.sin_port) - cxgb3_sport_base;
-
- c3cn->saddr.sin_port = 0;
- if (idx < 0 || idx >= cxgb3_max_connect)
- return;
- spin_lock_bh(&cdata->lock);
- cdata->sport_conn[idx] = NULL;
- spin_unlock_bh(&cdata->lock);
- c3cn_conn_debug("%s, release port %u.\n",
- cdata->cdev->name, cxgb3_sport_base + idx);
- }
-}
-
-static inline void c3cn_set_flag(struct s3_conn *c3cn, enum c3cn_flags flag)
-{
- __set_bit(flag, &c3cn->flags);
- c3cn_conn_debug("c3cn 0x%p, set %d, s %u, f 0x%lx.\n",
- c3cn, flag, c3cn->state, c3cn->flags);
-}
-
-static inline void c3cn_clear_flag(struct s3_conn *c3cn, enum c3cn_flags flag)
-{
- __clear_bit(flag, &c3cn->flags);
- c3cn_conn_debug("c3cn 0x%p, clear %d, s %u, f 0x%lx.\n",
- c3cn, flag, c3cn->state, c3cn->flags);
-}
-
-static inline int c3cn_flag(struct s3_conn *c3cn, enum c3cn_flags flag)
-{
- if (c3cn == NULL)
- return 0;
- return test_bit(flag, &c3cn->flags);
-}
-
-static void c3cn_set_state(struct s3_conn *c3cn, int state)
-{
- c3cn_conn_debug("c3cn 0x%p state -> %u.\n", c3cn, state);
- c3cn->state = state;
-}
-
-static inline void c3cn_hold(struct s3_conn *c3cn)
-{
- atomic_inc(&c3cn->refcnt);
-}
-
-static inline void c3cn_put(struct s3_conn *c3cn)
-{
- if (atomic_dec_and_test(&c3cn->refcnt)) {
- c3cn_conn_debug("free c3cn 0x%p, s %u, f 0x%lx.\n",
- c3cn, c3cn->state, c3cn->flags);
- kfree(c3cn);
- }
-}
-
-static void c3cn_closed(struct s3_conn *c3cn)
-{
- c3cn_conn_debug("c3cn 0x%p, state %u, flag 0x%lx.\n",
- c3cn, c3cn->state, c3cn->flags);
-
- c3cn_put_port(c3cn);
- c3cn_release_offload_resources(c3cn);
- c3cn_set_state(c3cn, C3CN_STATE_CLOSED);
- cxgb3i_conn_closing(c3cn);
-}
-
-/*
- * CPL (Chelsio Protocol Language) defines a message passing interface between
- * the host driver and T3 asic.
- * The section below implments CPLs that related to iscsi tcp connection
- * open/close/abort and data send/receive.
- */
-
-/*
- * CPL connection active open request: host ->
- */
-static unsigned int find_best_mtu(const struct t3c_data *d, unsigned short mtu)
-{
- int i = 0;
-
- while (i < d->nmtus - 1 && d->mtus[i + 1] <= mtu)
- ++i;
- return i;
-}
-
-static unsigned int select_mss(struct s3_conn *c3cn, unsigned int pmtu)
-{
- unsigned int idx;
- struct dst_entry *dst = c3cn->dst_cache;
- struct t3cdev *cdev = c3cn->cdev;
- const struct t3c_data *td = T3C_DATA(cdev);
- u16 advmss = dst_metric(dst, RTAX_ADVMSS);
-
- if (advmss > pmtu - 40)
- advmss = pmtu - 40;
- if (advmss < td->mtus[0] - 40)
- advmss = td->mtus[0] - 40;
- idx = find_best_mtu(td, advmss + 40);
- return idx;
-}
-
-static inline int compute_wscale(int win)
-{
- int wscale = 0;
- while (wscale < 14 && (65535<<wscale) < win)
- wscale++;
- return wscale;
-}
-
-static inline unsigned int calc_opt0h(struct s3_conn *c3cn)
-{
- int wscale = compute_wscale(cxgb3_rcv_win);
- return V_KEEP_ALIVE(1) |
- F_TCAM_BYPASS |
- V_WND_SCALE(wscale) |
- V_MSS_IDX(c3cn->mss_idx);
-}
-
-static inline unsigned int calc_opt0l(struct s3_conn *c3cn)
-{
- return V_ULP_MODE(ULP_MODE_ISCSI) |
- V_RCV_BUFSIZ(cxgb3_rcv_win>>10);
-}
-
-static void make_act_open_req(struct s3_conn *c3cn, struct sk_buff *skb,
- unsigned int atid, const struct l2t_entry *e)
-{
- struct cpl_act_open_req *req;
-
- c3cn_conn_debug("c3cn 0x%p, atid 0x%x.\n", c3cn, atid);
-
- skb->priority = CPL_PRIORITY_SETUP;
- req = (struct cpl_act_open_req *)__skb_put(skb, sizeof(*req));
- req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
- req->wr.wr_lo = 0;
- OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, atid));
- req->local_port = c3cn->saddr.sin_port;
- req->peer_port = c3cn->daddr.sin_port;
- req->local_ip = c3cn->saddr.sin_addr.s_addr;
- req->peer_ip = c3cn->daddr.sin_addr.s_addr;
- req->opt0h = htonl(calc_opt0h(c3cn) | V_L2T_IDX(e->idx) |
- V_TX_CHANNEL(e->smt_idx));
- req->opt0l = htonl(calc_opt0l(c3cn));
- req->params = 0;
- req->opt2 = 0;
-}
-
-static void fail_act_open(struct s3_conn *c3cn, int errno)
-{
- c3cn_conn_debug("c3cn 0x%p, state %u, flag 0x%lx.\n",
- c3cn, c3cn->state, c3cn->flags);
- c3cn->err = errno;
- c3cn_closed(c3cn);
-}
-
-static void act_open_req_arp_failure(struct t3cdev *dev, struct sk_buff *skb)
-{
- struct s3_conn *c3cn = (struct s3_conn *)skb->sk;
-
- c3cn_conn_debug("c3cn 0x%p, state %u.\n", c3cn, c3cn->state);
-
- c3cn_hold(c3cn);
- spin_lock_bh(&c3cn->lock);
- if (c3cn->state == C3CN_STATE_CONNECTING)
- fail_act_open(c3cn, -EHOSTUNREACH);
- spin_unlock_bh(&c3cn->lock);
- c3cn_put(c3cn);
- __kfree_skb(skb);
-}
-
-/*
- * CPL connection close request: host ->
- *
- * Close a connection by sending a CPL_CLOSE_CON_REQ message and queue it to
- * the write queue (i.e., after any unsent txt data).
- */
-static void skb_entail(struct s3_conn *c3cn, struct sk_buff *skb,
- int flags)
-{
- skb_tcp_seq(skb) = c3cn->write_seq;
- skb_flags(skb) = flags;
- __skb_queue_tail(&c3cn->write_queue, skb);
-}
-
-static void send_close_req(struct s3_conn *c3cn)
-{
- struct sk_buff *skb = c3cn->cpl_close;
- struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head;
- unsigned int tid = c3cn->tid;
-
- c3cn_conn_debug("c3cn 0x%p, state 0x%x, flag 0x%lx.\n",
- c3cn, c3cn->state, c3cn->flags);
-
- c3cn->cpl_close = NULL;
-
- req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_CLOSE_CON));
- req->wr.wr_lo = htonl(V_WR_TID(tid));
- OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid));
- req->rsvd = htonl(c3cn->write_seq);
-
- skb_entail(c3cn, skb, C3CB_FLAG_NO_APPEND);
- if (c3cn->state != C3CN_STATE_CONNECTING)
- c3cn_push_tx_frames(c3cn, 1);
-}
-
-/*
- * CPL connection abort request: host ->
- *
- * Send an ABORT_REQ message. Makes sure we do not send multiple ABORT_REQs
- * for the same connection and also that we do not try to send a message
- * after the connection has closed.
- */
-static void abort_arp_failure(struct t3cdev *cdev, struct sk_buff *skb)
-{
- struct cpl_abort_req *req = cplhdr(skb);
-
- c3cn_conn_debug("tdev 0x%p.\n", cdev);
-
- req->cmd = CPL_ABORT_NO_RST;
- cxgb3_ofld_send(cdev, skb);
-}
-
-static inline void c3cn_purge_write_queue(struct s3_conn *c3cn)
-{
- struct sk_buff *skb;
-
- while ((skb = __skb_dequeue(&c3cn->write_queue)))
- __kfree_skb(skb);
-}
-
-static void send_abort_req(struct s3_conn *c3cn)
-{
- struct sk_buff *skb = c3cn->cpl_abort_req;
- struct cpl_abort_req *req;
- unsigned int tid = c3cn->tid;
-
- if (unlikely(c3cn->state == C3CN_STATE_ABORTING) || !skb ||
- !c3cn->cdev)
- return;
-
- c3cn_set_state(c3cn, C3CN_STATE_ABORTING);
-
- c3cn_conn_debug("c3cn 0x%p, flag ABORT_RPL + ABORT_SHUT.\n", c3cn);
-
- c3cn_set_flag(c3cn, C3CN_ABORT_RPL_PENDING);
-
- /* Purge the send queue so we don't send anything after an abort. */
- c3cn_purge_write_queue(c3cn);
-
- c3cn->cpl_abort_req = NULL;
- req = (struct cpl_abort_req *)skb->head;
- memset(req, 0, sizeof(*req));
-
- skb->priority = CPL_PRIORITY_DATA;
- set_arp_failure_handler(skb, abort_arp_failure);
-
- req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_REQ));
- req->wr.wr_lo = htonl(V_WR_TID(tid));
- OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ABORT_REQ, tid));
- req->rsvd0 = htonl(c3cn->snd_nxt);
- req->rsvd1 = !c3cn_flag(c3cn, C3CN_TX_DATA_SENT);
- req->cmd = CPL_ABORT_SEND_RST;
-
- l2t_send(c3cn->cdev, skb, c3cn->l2t);
-}
-
-/*
- * CPL connection abort reply: host ->
- *
- * Send an ABORT_RPL message in response of the ABORT_REQ received.
- */
-static void send_abort_rpl(struct s3_conn *c3cn, int rst_status)
-{
- struct sk_buff *skb = c3cn->cpl_abort_rpl;
- struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head;
-
- c3cn->cpl_abort_rpl = NULL;
-
- skb->priority = CPL_PRIORITY_DATA;
- memset(rpl, 0, sizeof(*rpl));
- rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL));
- rpl->wr.wr_lo = htonl(V_WR_TID(c3cn->tid));
- OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, c3cn->tid));
- rpl->cmd = rst_status;
-
- cxgb3_ofld_send(c3cn->cdev, skb);
-}
-
-/*
- * CPL connection rx data ack: host ->
- * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of
- * credits sent.
- */
-static u32 send_rx_credits(struct s3_conn *c3cn, u32 credits, u32 dack)
-{
- struct sk_buff *skb;
- struct cpl_rx_data_ack *req;
-
- skb = alloc_skb(sizeof(*req), GFP_ATOMIC);
- if (!skb)
- return 0;
-
- req = (struct cpl_rx_data_ack *)__skb_put(skb, sizeof(*req));
- req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
- req->wr.wr_lo = 0;
- OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_RX_DATA_ACK, c3cn->tid));
- req->credit_dack = htonl(dack | V_RX_CREDITS(credits));
- skb->priority = CPL_PRIORITY_ACK;
- cxgb3_ofld_send(c3cn->cdev, skb);
- return credits;
-}
-
-/*
- * CPL connection tx data: host ->
- *
- * Send iscsi PDU via TX_DATA CPL message. Returns the number of
- * credits sent.
- * Each TX_DATA consumes work request credit (wrs), so we need to keep track of
- * how many we've used so far and how many are pending (i.e., yet ack'ed by T3).
- */
-
-/*
- * For ULP connections HW may inserts digest bytes into the pdu. Those digest
- * bytes are not sent by the host but are part of the TCP payload and therefore
- * consume TCP sequence space.
- */
-static const unsigned int cxgb3_ulp_extra_len[] = { 0, 4, 4, 8 };
-static inline unsigned int ulp_extra_len(const struct sk_buff *skb)
-{
- return cxgb3_ulp_extra_len[skb_ulp_mode(skb) & 3];
-}
-
-static unsigned int wrlen __read_mostly;
-
-/*
- * The number of WRs needed for an skb depends on the number of fragments
- * in the skb and whether it has any payload in its main body. This maps the
- * length of the gather list represented by an skb into the # of necessary WRs.
- * The extra two fragments are for iscsi bhs and payload padding.
- */
-#define SKB_WR_LIST_SIZE (MAX_SKB_FRAGS + 2)
-static unsigned int skb_wrs[SKB_WR_LIST_SIZE] __read_mostly;
-
-static void s3_init_wr_tab(unsigned int wr_len)
-{
- int i;
-
- if (skb_wrs[1]) /* already initialized */
- return;
-
- for (i = 1; i < SKB_WR_LIST_SIZE; i++) {
- int sgl_len = (3 * i) / 2 + (i & 1);
-
- sgl_len += 3;
- skb_wrs[i] = (sgl_len <= wr_len
- ? 1 : 1 + (sgl_len - 2) / (wr_len - 1));
- }
-
- wrlen = wr_len * 8;
-}
-
-static inline void reset_wr_list(struct s3_conn *c3cn)
-{
- c3cn->wr_pending_head = c3cn->wr_pending_tail = NULL;
-}
-
-/*
- * Add a WR to a connections's list of pending WRs. This is a singly-linked
- * list of sk_buffs operating as a FIFO. The head is kept in wr_pending_head
- * and the tail in wr_pending_tail.
- */
-static inline void enqueue_wr(struct s3_conn *c3cn,
- struct sk_buff *skb)
-{
- skb_tx_wr_next(skb) = NULL;
-
- /*
- * We want to take an extra reference since both us and the driver
- * need to free the packet before it's really freed. We know there's
- * just one user currently so we use atomic_set rather than skb_get
- * to avoid the atomic op.
- */
- atomic_set(&skb->users, 2);
-
- if (!c3cn->wr_pending_head)
- c3cn->wr_pending_head = skb;
- else
- skb_tx_wr_next(c3cn->wr_pending_tail) = skb;
- c3cn->wr_pending_tail = skb;
-}
-
-static int count_pending_wrs(struct s3_conn *c3cn)
-{
- int n = 0;
- const struct sk_buff *skb = c3cn->wr_pending_head;
-
- while (skb) {
- n += skb->csum;
- skb = skb_tx_wr_next(skb);
- }
- return n;
-}
-
-static inline struct sk_buff *peek_wr(const struct s3_conn *c3cn)
-{
- return c3cn->wr_pending_head;
-}
-
-static inline void free_wr_skb(struct sk_buff *skb)
-{
- kfree_skb(skb);
-}
-
-static inline struct sk_buff *dequeue_wr(struct s3_conn *c3cn)
-{
- struct sk_buff *skb = c3cn->wr_pending_head;
-
- if (likely(skb)) {
- /* Don't bother clearing the tail */
- c3cn->wr_pending_head = skb_tx_wr_next(skb);
- skb_tx_wr_next(skb) = NULL;
- }
- return skb;
-}
-
-static void purge_wr_queue(struct s3_conn *c3cn)
-{
- struct sk_buff *skb;
- while ((skb = dequeue_wr(c3cn)) != NULL)
- free_wr_skb(skb);
-}
-
-static inline void make_tx_data_wr(struct s3_conn *c3cn, struct sk_buff *skb,
- int len, int req_completion)
-{
- struct tx_data_wr *req;
-
- skb_reset_transport_header(skb);
- req = (struct tx_data_wr *)__skb_push(skb, sizeof(*req));
- req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA) |
- (req_completion ? F_WR_COMPL : 0));
- req->wr_lo = htonl(V_WR_TID(c3cn->tid));
- req->sndseq = htonl(c3cn->snd_nxt);
- /* len includes the length of any HW ULP additions */
- req->len = htonl(len);
- req->param = htonl(V_TX_PORT(c3cn->l2t->smt_idx));
- /* V_TX_ULP_SUBMODE sets both the mode and submode */
- req->flags = htonl(V_TX_ULP_SUBMODE(skb_ulp_mode(skb)) |
- V_TX_SHOVE((skb_peek(&c3cn->write_queue) ? 0 : 1)));
-
- if (!c3cn_flag(c3cn, C3CN_TX_DATA_SENT)) {
- req->flags |= htonl(V_TX_ACK_PAGES(2) | F_TX_INIT |
- V_TX_CPU_IDX(c3cn->qset));
- /* Sendbuffer is in units of 32KB. */
- req->param |= htonl(V_TX_SNDBUF(cxgb3_snd_win >> 15));
- c3cn_set_flag(c3cn, C3CN_TX_DATA_SENT);
- }
-}
-
-/**
- * c3cn_push_tx_frames -- start transmit
- * @c3cn: the offloaded connection
- * @req_completion: request wr_ack or not
- *
- * Prepends TX_DATA_WR or CPL_CLOSE_CON_REQ headers to buffers waiting in a
- * connection's send queue and sends them on to T3. Must be called with the
- * connection's lock held. Returns the amount of send buffer space that was
- * freed as a result of sending queued data to T3.
- */
-static void arp_failure_discard(struct t3cdev *cdev, struct sk_buff *skb)
-{
- kfree_skb(skb);
-}
-
-static int c3cn_push_tx_frames(struct s3_conn *c3cn, int req_completion)
-{
- int total_size = 0;
- struct sk_buff *skb;
- struct t3cdev *cdev;
- struct cxgb3i_sdev_data *cdata;
-
- if (unlikely(c3cn->state == C3CN_STATE_CONNECTING ||
- c3cn->state == C3CN_STATE_CLOSE_WAIT_1 ||
- c3cn->state >= C3CN_STATE_ABORTING)) {
- c3cn_tx_debug("c3cn 0x%p, in closing state %u.\n",
- c3cn, c3cn->state);
- return 0;
- }
-
- cdev = c3cn->cdev;
- cdata = CXGB3_SDEV_DATA(cdev);
-
- while (c3cn->wr_avail
- && (skb = skb_peek(&c3cn->write_queue)) != NULL) {
- int len = skb->len; /* length before skb_push */
- int frags = skb_shinfo(skb)->nr_frags + (len != skb->data_len);
- int wrs_needed = skb_wrs[frags];
-
- if (wrs_needed > 1 && len + sizeof(struct tx_data_wr) <= wrlen)
- wrs_needed = 1;
-
- WARN_ON(frags >= SKB_WR_LIST_SIZE || wrs_needed < 1);
-
- if (c3cn->wr_avail < wrs_needed) {
- c3cn_tx_debug("c3cn 0x%p, skb len %u/%u, frag %u, "
- "wr %d < %u.\n",
- c3cn, skb->len, skb->data_len, frags,
- wrs_needed, c3cn->wr_avail);
- break;
- }
-
- __skb_unlink(skb, &c3cn->write_queue);
- skb->priority = CPL_PRIORITY_DATA;
- skb->csum = wrs_needed; /* remember this until the WR_ACK */
- c3cn->wr_avail -= wrs_needed;
- c3cn->wr_unacked += wrs_needed;
- enqueue_wr(c3cn, skb);
-
- c3cn_tx_debug("c3cn 0x%p, enqueue, skb len %u/%u, frag %u, "
- "wr %d, left %u, unack %u.\n",
- c3cn, skb->len, skb->data_len, frags,
- wrs_needed, c3cn->wr_avail, c3cn->wr_unacked);
-
-
- if (likely(skb_flags(skb) & C3CB_FLAG_NEED_HDR)) {
- if ((req_completion &&
- c3cn->wr_unacked == wrs_needed) ||
- (skb_flags(skb) & C3CB_FLAG_COMPL) ||
- c3cn->wr_unacked >= c3cn->wr_max / 2) {
- req_completion = 1;
- c3cn->wr_unacked = 0;
- }
- len += ulp_extra_len(skb);
- make_tx_data_wr(c3cn, skb, len, req_completion);
- c3cn->snd_nxt += len;
- skb_flags(skb) &= ~C3CB_FLAG_NEED_HDR;
- }
-
- total_size += skb->truesize;
- set_arp_failure_handler(skb, arp_failure_discard);
- l2t_send(cdev, skb, c3cn->l2t);
- }
- return total_size;
-}
-
-/*
- * process_cpl_msg: -> host
- * Top-level CPL message processing used by most CPL messages that
- * pertain to connections.
- */
-static inline void process_cpl_msg(void (*fn)(struct s3_conn *,
- struct sk_buff *),
- struct s3_conn *c3cn,
- struct sk_buff *skb)
-{
- spin_lock_bh(&c3cn->lock);
- fn(c3cn, skb);
- spin_unlock_bh(&c3cn->lock);
-}
-
-/*
- * process_cpl_msg_ref: -> host
- * Similar to process_cpl_msg() but takes an extra connection reference around
- * the call to the handler. Should be used if the handler may drop a
- * connection reference.
- */
-static inline void process_cpl_msg_ref(void (*fn) (struct s3_conn *,
- struct sk_buff *),
- struct s3_conn *c3cn,
- struct sk_buff *skb)
-{
- c3cn_hold(c3cn);
- process_cpl_msg(fn, c3cn, skb);
- c3cn_put(c3cn);
-}
-
-/*
- * Process a CPL_ACT_ESTABLISH message: -> host
- * Updates connection state from an active establish CPL message. Runs with
- * the connection lock held.
- */
-
-static inline void s3_free_atid(struct t3cdev *cdev, unsigned int tid)
-{
- struct s3_conn *c3cn = cxgb3_free_atid(cdev, tid);
- if (c3cn)
- c3cn_put(c3cn);
-}
-
-static void c3cn_established(struct s3_conn *c3cn, u32 snd_isn,
- unsigned int opt)
-{
- c3cn_conn_debug("c3cn 0x%p, state %u.\n", c3cn, c3cn->state);
-
- c3cn->write_seq = c3cn->snd_nxt = c3cn->snd_una = snd_isn;
-
- /*
- * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't
- * pass through opt0.
- */
- if (cxgb3_rcv_win > (M_RCV_BUFSIZ << 10))
- c3cn->rcv_wup -= cxgb3_rcv_win - (M_RCV_BUFSIZ << 10);
-
- dst_confirm(c3cn->dst_cache);
-
- smp_mb();
-
- c3cn_set_state(c3cn, C3CN_STATE_ESTABLISHED);
-}
-
-static void process_act_establish(struct s3_conn *c3cn, struct sk_buff *skb)
-{
- struct cpl_act_establish *req = cplhdr(skb);
- u32 rcv_isn = ntohl(req->rcv_isn); /* real RCV_ISN + 1 */
-
- c3cn_conn_debug("c3cn 0x%p, state %u, flag 0x%lx.\n",
- c3cn, c3cn->state, c3cn->flags);
-
- if (unlikely(c3cn->state != C3CN_STATE_CONNECTING))
- cxgb3i_log_error("TID %u expected SYN_SENT, got EST., s %u\n",
- c3cn->tid, c3cn->state);
-
- c3cn->copied_seq = c3cn->rcv_wup = c3cn->rcv_nxt = rcv_isn;
- c3cn_established(c3cn, ntohl(req->snd_isn), ntohs(req->tcp_opt));
-
- __kfree_skb(skb);
-
- if (unlikely(c3cn_flag(c3cn, C3CN_ACTIVE_CLOSE_NEEDED)))
- /* upper layer has requested closing */
- send_abort_req(c3cn);
- else {
- if (skb_queue_len(&c3cn->write_queue))
- c3cn_push_tx_frames(c3cn, 1);
- cxgb3i_conn_tx_open(c3cn);
- }
-}
-
-static int do_act_establish(struct t3cdev *cdev, struct sk_buff *skb,
- void *ctx)
-{
- struct cpl_act_establish *req = cplhdr(skb);
- unsigned int tid = GET_TID(req);
- unsigned int atid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
- struct s3_conn *c3cn = ctx;
- struct cxgb3i_sdev_data *cdata = CXGB3_SDEV_DATA(cdev);
-
- c3cn_conn_debug("rcv, tid 0x%x, c3cn 0x%p, s %u, f 0x%lx.\n",
- tid, c3cn, c3cn->state, c3cn->flags);
-
- c3cn->tid = tid;
- c3cn_hold(c3cn);
- cxgb3_insert_tid(cdata->cdev, cdata->client, c3cn, tid);
- s3_free_atid(cdev, atid);
-
- c3cn->qset = G_QNUM(ntohl(skb->csum));
-
- process_cpl_msg(process_act_establish, c3cn, skb);
- return 0;
-}
-
-/*
- * Process a CPL_ACT_OPEN_RPL message: -> host
- * Handle active open failures.
- */
-static int act_open_rpl_status_to_errno(int status)
-{
- switch (status) {
- case CPL_ERR_CONN_RESET:
- return -ECONNREFUSED;
- case CPL_ERR_ARP_MISS:
- return -EHOSTUNREACH;
- case CPL_ERR_CONN_TIMEDOUT:
- return -ETIMEDOUT;
- case CPL_ERR_TCAM_FULL:
- return -ENOMEM;
- case CPL_ERR_CONN_EXIST:
- cxgb3i_log_error("ACTIVE_OPEN_RPL: 4-tuple in use\n");
- return -EADDRINUSE;
- default:
- return -EIO;
- }
-}
-
-static void act_open_retry_timer(unsigned long data)
-{
- struct sk_buff *skb;
- struct s3_conn *c3cn = (struct s3_conn *)data;
-
- c3cn_conn_debug("c3cn 0x%p, state %u.\n", c3cn, c3cn->state);
-
- spin_lock_bh(&c3cn->lock);
- skb = alloc_skb(sizeof(struct cpl_act_open_req), GFP_ATOMIC);
- if (!skb)
- fail_act_open(c3cn, -ENOMEM);
- else {
- skb->sk = (struct sock *)c3cn;
- set_arp_failure_handler(skb, act_open_req_arp_failure);
- make_act_open_req(c3cn, skb, c3cn->tid, c3cn->l2t);
- l2t_send(c3cn->cdev, skb, c3cn->l2t);
- }
- spin_unlock_bh(&c3cn->lock);
- c3cn_put(c3cn);
-}
-
-static void process_act_open_rpl(struct s3_conn *c3cn, struct sk_buff *skb)
-{
- struct cpl_act_open_rpl *rpl = cplhdr(skb);
-
- c3cn_conn_debug("c3cn 0x%p, state %u, flag 0x%lx.\n",
- c3cn, c3cn->state, c3cn->flags);
-
- if (rpl->status == CPL_ERR_CONN_EXIST &&
- c3cn->retry_timer.function != act_open_retry_timer) {
- c3cn->retry_timer.function = act_open_retry_timer;
- if (!mod_timer(&c3cn->retry_timer, jiffies + HZ / 2))
- c3cn_hold(c3cn);
- } else
- fail_act_open(c3cn, act_open_rpl_status_to_errno(rpl->status));
- __kfree_skb(skb);
-}
-
-static int do_act_open_rpl(struct t3cdev *cdev, struct sk_buff *skb, void *ctx)
-{
- struct s3_conn *c3cn = ctx;
- struct cpl_act_open_rpl *rpl = cplhdr(skb);
-
- c3cn_conn_debug("rcv, status 0x%x, c3cn 0x%p, s %u, f 0x%lx.\n",
- rpl->status, c3cn, c3cn->state, c3cn->flags);
-
- if (rpl->status != CPL_ERR_TCAM_FULL &&
- rpl->status != CPL_ERR_CONN_EXIST &&
- rpl->status != CPL_ERR_ARP_MISS)
- cxgb3_queue_tid_release(cdev, GET_TID(rpl));
-
- process_cpl_msg_ref(process_act_open_rpl, c3cn, skb);
- return 0;
-}
-
-/*
- * Process PEER_CLOSE CPL messages: -> host
- * Handle peer FIN.
- */
-static void process_peer_close(struct s3_conn *c3cn, struct sk_buff *skb)
-{
- c3cn_conn_debug("c3cn 0x%p, state %u, flag 0x%lx.\n",
- c3cn, c3cn->state, c3cn->flags);
-
- if (c3cn_flag(c3cn, C3CN_ABORT_RPL_PENDING))
- goto out;
-
- switch (c3cn->state) {
- case C3CN_STATE_ESTABLISHED:
- c3cn_set_state(c3cn, C3CN_STATE_PASSIVE_CLOSE);
- break;
- case C3CN_STATE_ACTIVE_CLOSE:
- c3cn_set_state(c3cn, C3CN_STATE_CLOSE_WAIT_2);
- break;
- case C3CN_STATE_CLOSE_WAIT_1:
- c3cn_closed(c3cn);
- break;
- case C3CN_STATE_ABORTING:
- break;
- default:
- cxgb3i_log_error("%s: peer close, TID %u in bad state %u\n",
- c3cn->cdev->name, c3cn->tid, c3cn->state);
- }
-
- cxgb3i_conn_closing(c3cn);
-out:
- __kfree_skb(skb);
-}
-
-static int do_peer_close(struct t3cdev *cdev, struct sk_buff *skb, void *ctx)
-{
- struct s3_conn *c3cn = ctx;
-
- c3cn_conn_debug("rcv, c3cn 0x%p, s %u, f 0x%lx.\n",
- c3cn, c3cn->state, c3cn->flags);
- process_cpl_msg_ref(process_peer_close, c3cn, skb);
- return 0;
-}
-
-/*
- * Process CLOSE_CONN_RPL CPL message: -> host
- * Process a peer ACK to our FIN.
- */
-static void process_close_con_rpl(struct s3_conn *c3cn, struct sk_buff *skb)
-{
- struct cpl_close_con_rpl *rpl = cplhdr(skb);
-
- c3cn_conn_debug("c3cn 0x%p, state %u, flag 0x%lx.\n",
- c3cn, c3cn->state, c3cn->flags);
-
- c3cn->snd_una = ntohl(rpl->snd_nxt) - 1; /* exclude FIN */
-
- if (c3cn_flag(c3cn, C3CN_ABORT_RPL_PENDING))
- goto out;
-
- switch (c3cn->state) {
- case C3CN_STATE_ACTIVE_CLOSE:
- c3cn_set_state(c3cn, C3CN_STATE_CLOSE_WAIT_1);
- break;
- case C3CN_STATE_CLOSE_WAIT_1:
- case C3CN_STATE_CLOSE_WAIT_2:
- c3cn_closed(c3cn);
- break;
- case C3CN_STATE_ABORTING:
- break;
- default:
- cxgb3i_log_error("%s: close_rpl, TID %u in bad state %u\n",
- c3cn->cdev->name, c3cn->tid, c3cn->state);
- }
-
-out:
- kfree_skb(skb);
-}
-
-static int do_close_con_rpl(struct t3cdev *cdev, struct sk_buff *skb,
- void *ctx)
-{
- struct s3_conn *c3cn = ctx;
-
- c3cn_conn_debug("rcv, c3cn 0x%p, s %u, f 0x%lx.\n",
- c3cn, c3cn->state, c3cn->flags);
-
- process_cpl_msg_ref(process_close_con_rpl, c3cn, skb);
- return 0;
-}
-
-/*
- * Process ABORT_REQ_RSS CPL message: -> host
- * Process abort requests. If we are waiting for an ABORT_RPL we ignore this
- * request except that we need to reply to it.
- */
-
-static int abort_status_to_errno(struct s3_conn *c3cn, int abort_reason,
- int *need_rst)
-{
- switch (abort_reason) {
- case CPL_ERR_BAD_SYN: /* fall through */
- case CPL_ERR_CONN_RESET:
- return c3cn->state > C3CN_STATE_ESTABLISHED ?
- -EPIPE : -ECONNRESET;
- case CPL_ERR_XMIT_TIMEDOUT:
- case CPL_ERR_PERSIST_TIMEDOUT:
- case CPL_ERR_FINWAIT2_TIMEDOUT:
- case CPL_ERR_KEEPALIVE_TIMEDOUT:
- return -ETIMEDOUT;
- default:
- return -EIO;
- }
-}
-
-static void process_abort_req(struct s3_conn *c3cn, struct sk_buff *skb)
-{
- int rst_status = CPL_ABORT_NO_RST;
- const struct cpl_abort_req_rss *req = cplhdr(skb);
-
- c3cn_conn_debug("c3cn 0x%p, state %u, flag 0x%lx.\n",
- c3cn, c3cn->state, c3cn->flags);
-
- if (!c3cn_flag(c3cn, C3CN_ABORT_REQ_RCVD)) {
- c3cn_set_flag(c3cn, C3CN_ABORT_REQ_RCVD);
- c3cn_set_state(c3cn, C3CN_STATE_ABORTING);
- __kfree_skb(skb);
- return;
- }
-
- c3cn_clear_flag(c3cn, C3CN_ABORT_REQ_RCVD);
- send_abort_rpl(c3cn, rst_status);
-
- if (!c3cn_flag(c3cn, C3CN_ABORT_RPL_PENDING)) {
- c3cn->err =
- abort_status_to_errno(c3cn, req->status, &rst_status);
- c3cn_closed(c3cn);
- }
-}
-
-static int do_abort_req(struct t3cdev *cdev, struct sk_buff *skb, void *ctx)
-{
- const struct cpl_abort_req_rss *req = cplhdr(skb);
- struct s3_conn *c3cn = ctx;
-
- c3cn_conn_debug("rcv, c3cn 0x%p, s 0x%x, f 0x%lx.\n",
- c3cn, c3cn->state, c3cn->flags);
-
- if (req->status == CPL_ERR_RTX_NEG_ADVICE ||
- req->status == CPL_ERR_PERSIST_NEG_ADVICE) {
- __kfree_skb(skb);
- return 0;
- }
-
- process_cpl_msg_ref(process_abort_req, c3cn, skb);
- return 0;
-}
-
-/*
- * Process ABORT_RPL_RSS CPL message: -> host
- * Process abort replies. We only process these messages if we anticipate
- * them as the coordination between SW and HW in this area is somewhat lacking
- * and sometimes we get ABORT_RPLs after we are done with the connection that
- * originated the ABORT_REQ.
- */
-static void process_abort_rpl(struct s3_conn *c3cn, struct sk_buff *skb)
-{
- c3cn_conn_debug("c3cn 0x%p, state %u, flag 0x%lx.\n",
- c3cn, c3cn->state, c3cn->flags);
-
- if (c3cn_flag(c3cn, C3CN_ABORT_RPL_PENDING)) {
- if (!c3cn_flag(c3cn, C3CN_ABORT_RPL_RCVD))
- c3cn_set_flag(c3cn, C3CN_ABORT_RPL_RCVD);
- else {
- c3cn_clear_flag(c3cn, C3CN_ABORT_RPL_RCVD);
- c3cn_clear_flag(c3cn, C3CN_ABORT_RPL_PENDING);
- if (c3cn_flag(c3cn, C3CN_ABORT_REQ_RCVD))
- cxgb3i_log_error("%s tid %u, ABORT_RPL_RSS\n",
- c3cn->cdev->name, c3cn->tid);
- c3cn_closed(c3cn);
- }
- }
- __kfree_skb(skb);
-}
-
-static int do_abort_rpl(struct t3cdev *cdev, struct sk_buff *skb, void *ctx)
-{
- struct cpl_abort_rpl_rss *rpl = cplhdr(skb);
- struct s3_conn *c3cn = ctx;
-
- c3cn_conn_debug("rcv, status 0x%x, c3cn 0x%p, s %u, 0x%lx.\n",
- rpl->status, c3cn, c3cn ? c3cn->state : 0,
- c3cn ? c3cn->flags : 0UL);
-
- /*
- * Ignore replies to post-close aborts indicating that the abort was
- * requested too late. These connections are terminated when we get
- * PEER_CLOSE or CLOSE_CON_RPL and by the time the abort_rpl_rss
- * arrives the TID is either no longer used or it has been recycled.
- */
- if (rpl->status == CPL_ERR_ABORT_FAILED)
- goto discard;
-
- /*
- * Sometimes we've already closed the connection, e.g., a post-close
- * abort races with ABORT_REQ_RSS, the latter frees the connection
- * expecting the ABORT_REQ will fail with CPL_ERR_ABORT_FAILED,
- * but FW turns the ABORT_REQ into a regular one and so we get
- * ABORT_RPL_RSS with status 0 and no connection.
- */
- if (!c3cn)
- goto discard;
-
- process_cpl_msg_ref(process_abort_rpl, c3cn, skb);
- return 0;
-
-discard:
- __kfree_skb(skb);
- return 0;
-}
-
-/*
- * Process RX_ISCSI_HDR CPL message: -> host
- * Handle received PDUs, the payload could be DDP'ed. If not, the payload
- * follow after the bhs.
- */
-static void process_rx_iscsi_hdr(struct s3_conn *c3cn, struct sk_buff *skb)
-{
- struct cpl_iscsi_hdr *hdr_cpl = cplhdr(skb);
- struct cpl_iscsi_hdr_norss data_cpl;
- struct cpl_rx_data_ddp_norss ddp_cpl;
- unsigned int hdr_len, data_len, status;
- unsigned int len;
- int err;
-
- if (unlikely(c3cn->state >= C3CN_STATE_PASSIVE_CLOSE)) {
- if (c3cn->state != C3CN_STATE_ABORTING)
- send_abort_req(c3cn);
- __kfree_skb(skb);
- return;
- }
-
- skb_tcp_seq(skb) = ntohl(hdr_cpl->seq);
- skb_flags(skb) = 0;
-
- skb_reset_transport_header(skb);
- __skb_pull(skb, sizeof(struct cpl_iscsi_hdr));
-
- len = hdr_len = ntohs(hdr_cpl->len);
- /* msg coalesce is off or not enough data received */
- if (skb->len <= hdr_len) {
- cxgb3i_log_error("%s: TID %u, ISCSI_HDR, skb len %u < %u.\n",
- c3cn->cdev->name, c3cn->tid,
- skb->len, hdr_len);
- goto abort_conn;
- }
-
- err = skb_copy_bits(skb, skb->len - sizeof(ddp_cpl), &ddp_cpl,
- sizeof(ddp_cpl));
- if (err < 0)
- goto abort_conn;
-
- skb_ulp_mode(skb) = ULP2_FLAG_DATA_READY;
- skb_rx_pdulen(skb) = ntohs(ddp_cpl.len);
- skb_rx_ddigest(skb) = ntohl(ddp_cpl.ulp_crc);
- status = ntohl(ddp_cpl.ddp_status);
-
- c3cn_rx_debug("rx skb 0x%p, len %u, pdulen %u, ddp status 0x%x.\n",
- skb, skb->len, skb_rx_pdulen(skb), status);
-
- if (status & (1 << RX_DDP_STATUS_HCRC_SHIFT))
- skb_ulp_mode(skb) |= ULP2_FLAG_HCRC_ERROR;
- if (status & (1 << RX_DDP_STATUS_DCRC_SHIFT))
- skb_ulp_mode(skb) |= ULP2_FLAG_DCRC_ERROR;
- if (status & (1 << RX_DDP_STATUS_PAD_SHIFT))
- skb_ulp_mode(skb) |= ULP2_FLAG_PAD_ERROR;
-
- if (skb->len > (hdr_len + sizeof(ddp_cpl))) {
- err = skb_copy_bits(skb, hdr_len, &data_cpl, sizeof(data_cpl));
- if (err < 0)
- goto abort_conn;
- data_len = ntohs(data_cpl.len);
- len += sizeof(data_cpl) + data_len;
- } else if (status & (1 << RX_DDP_STATUS_DDP_SHIFT))
- skb_ulp_mode(skb) |= ULP2_FLAG_DATA_DDPED;
-
- c3cn->rcv_nxt = ntohl(ddp_cpl.seq) + skb_rx_pdulen(skb);
- __pskb_trim(skb, len);
- __skb_queue_tail(&c3cn->receive_queue, skb);
- cxgb3i_conn_pdu_ready(c3cn);
-
- return;
-
-abort_conn:
- send_abort_req(c3cn);
- __kfree_skb(skb);
-}
-
-static int do_iscsi_hdr(struct t3cdev *t3dev, struct sk_buff *skb, void *ctx)
-{
- struct s3_conn *c3cn = ctx;
-
- process_cpl_msg(process_rx_iscsi_hdr, c3cn, skb);
- return 0;
-}
-
-/*
- * Process TX_DATA_ACK CPL messages: -> host
- * Process an acknowledgment of WR completion. Advance snd_una and send the
- * next batch of work requests from the write queue.
- */
-static void check_wr_invariants(struct s3_conn *c3cn)
-{
- int pending = count_pending_wrs(c3cn);
-
- if (unlikely(c3cn->wr_avail + pending != c3cn->wr_max))
- cxgb3i_log_error("TID %u: credit imbalance: avail %u, "
- "pending %u, total should be %u\n",
- c3cn->tid, c3cn->wr_avail, pending,
- c3cn->wr_max);
-}
-
-static void process_wr_ack(struct s3_conn *c3cn, struct sk_buff *skb)
-{
- struct cpl_wr_ack *hdr = cplhdr(skb);
- unsigned int credits = ntohs(hdr->credits);
- u32 snd_una = ntohl(hdr->snd_una);
-
- c3cn_tx_debug("%u WR credits, avail %u, unack %u, TID %u, state %u.\n",
- credits, c3cn->wr_avail, c3cn->wr_unacked,
- c3cn->tid, c3cn->state);
-
- c3cn->wr_avail += credits;
- if (c3cn->wr_unacked > c3cn->wr_max - c3cn->wr_avail)
- c3cn->wr_unacked = c3cn->wr_max - c3cn->wr_avail;
-
- while (credits) {
- struct sk_buff *p = peek_wr(c3cn);
-
- if (unlikely(!p)) {
- cxgb3i_log_error("%u WR_ACK credits for TID %u with "
- "nothing pending, state %u\n",
- credits, c3cn->tid, c3cn->state);
- break;
- }
- if (unlikely(credits < p->csum)) {
- struct tx_data_wr *w = cplhdr(p);
- cxgb3i_log_error("TID %u got %u WR credits need %u, "
- "len %u, main body %u, frags %u, "
- "seq # %u, ACK una %u, ACK nxt %u, "
- "WR_AVAIL %u, WRs pending %u\n",
- c3cn->tid, credits, p->csum, p->len,
- p->len - p->data_len,
- skb_shinfo(p)->nr_frags,
- ntohl(w->sndseq), snd_una,
- ntohl(hdr->snd_nxt), c3cn->wr_avail,
- count_pending_wrs(c3cn) - credits);
- p->csum -= credits;
- break;
- } else {
- dequeue_wr(c3cn);
- credits -= p->csum;
- free_wr_skb(p);
- }
- }
-
- check_wr_invariants(c3cn);
-
- if (unlikely(before(snd_una, c3cn->snd_una))) {
- cxgb3i_log_error("TID %u, unexpected sequence # %u in WR_ACK "
- "snd_una %u\n",
- c3cn->tid, snd_una, c3cn->snd_una);
- goto out_free;
- }
-
- if (c3cn->snd_una != snd_una) {
- c3cn->snd_una = snd_una;
- dst_confirm(c3cn->dst_cache);
- }
-
- if (skb_queue_len(&c3cn->write_queue)) {
- if (c3cn_push_tx_frames(c3cn, 0))
- cxgb3i_conn_tx_open(c3cn);
- } else
- cxgb3i_conn_tx_open(c3cn);
-out_free:
- __kfree_skb(skb);
-}
-
-static int do_wr_ack(struct t3cdev *cdev, struct sk_buff *skb, void *ctx)
-{
- struct s3_conn *c3cn = ctx;
-
- process_cpl_msg(process_wr_ack, c3cn, skb);
- return 0;
-}
-
-/*
- * for each connection, pre-allocate skbs needed for close/abort requests. So
- * that we can service the request right away.
- */
-static void c3cn_free_cpl_skbs(struct s3_conn *c3cn)
-{
- if (c3cn->cpl_close)
- kfree_skb(c3cn->cpl_close);
- if (c3cn->cpl_abort_req)
- kfree_skb(c3cn->cpl_abort_req);
- if (c3cn->cpl_abort_rpl)
- kfree_skb(c3cn->cpl_abort_rpl);
-}
-
-static int c3cn_alloc_cpl_skbs(struct s3_conn *c3cn)
-{
- c3cn->cpl_close = alloc_skb(sizeof(struct cpl_close_con_req),
- GFP_KERNEL);
- if (!c3cn->cpl_close)
- return -ENOMEM;
- skb_put(c3cn->cpl_close, sizeof(struct cpl_close_con_req));
-
- c3cn->cpl_abort_req = alloc_skb(sizeof(struct cpl_abort_req),
- GFP_KERNEL);
- if (!c3cn->cpl_abort_req)
- goto free_cpl_skbs;
- skb_put(c3cn->cpl_abort_req, sizeof(struct cpl_abort_req));
-
- c3cn->cpl_abort_rpl = alloc_skb(sizeof(struct cpl_abort_rpl),
- GFP_KERNEL);
- if (!c3cn->cpl_abort_rpl)
- goto free_cpl_skbs;
- skb_put(c3cn->cpl_abort_rpl, sizeof(struct cpl_abort_rpl));
-
- return 0;
-
-free_cpl_skbs:
- c3cn_free_cpl_skbs(c3cn);
- return -ENOMEM;
-}
-
-/**
- * c3cn_release_offload_resources - release offload resource
- * @c3cn: the offloaded iscsi tcp connection.
- * Release resources held by an offload connection (TID, L2T entry, etc.)
- */
-static void c3cn_release_offload_resources(struct s3_conn *c3cn)
-{
- struct t3cdev *cdev = c3cn->cdev;
- unsigned int tid = c3cn->tid;
-
- c3cn->qset = 0;
- c3cn_free_cpl_skbs(c3cn);
-
- if (c3cn->wr_avail != c3cn->wr_max) {
- purge_wr_queue(c3cn);
- reset_wr_list(c3cn);
- }
-
- if (cdev) {
- if (c3cn->l2t) {
- l2t_release(L2DATA(cdev), c3cn->l2t);
- c3cn->l2t = NULL;
- }
- if (c3cn->state == C3CN_STATE_CONNECTING)
- /* we have ATID */
- s3_free_atid(cdev, tid);
- else {
- /* we have TID */
- cxgb3_remove_tid(cdev, (void *)c3cn, tid);
- c3cn_put(c3cn);
- }
- }
-
- c3cn->dst_cache = NULL;
- c3cn->cdev = NULL;
-}
-
-/**
- * cxgb3i_c3cn_create - allocate and initialize an s3_conn structure
- * returns the s3_conn structure allocated.
- */
-struct s3_conn *cxgb3i_c3cn_create(void)
-{
- struct s3_conn *c3cn;
-
- c3cn = kzalloc(sizeof(*c3cn), GFP_KERNEL);
- if (!c3cn)
- return NULL;
-
- /* pre-allocate close/abort cpl, so we don't need to wait for memory
- when close/abort is requested. */
- if (c3cn_alloc_cpl_skbs(c3cn) < 0)
- goto free_c3cn;
-
- c3cn_conn_debug("alloc c3cn 0x%p.\n", c3cn);
-
- c3cn->flags = 0;
- spin_lock_init(&c3cn->lock);
- atomic_set(&c3cn->refcnt, 1);
- skb_queue_head_init(&c3cn->receive_queue);
- skb_queue_head_init(&c3cn->write_queue);
- setup_timer(&c3cn->retry_timer, NULL, (unsigned long)c3cn);
- rwlock_init(&c3cn->callback_lock);
-
- return c3cn;
-
-free_c3cn:
- kfree(c3cn);
- return NULL;
-}
-
-static void c3cn_active_close(struct s3_conn *c3cn)
-{
- int data_lost;
- int close_req = 0;
-
- c3cn_conn_debug("c3cn 0x%p, state %u, flag 0x%lx.\n",
- c3cn, c3cn->state, c3cn->flags);
-
- dst_confirm(c3cn->dst_cache);
-
- c3cn_hold(c3cn);
- spin_lock_bh(&c3cn->lock);
-
- data_lost = skb_queue_len(&c3cn->receive_queue);
- __skb_queue_purge(&c3cn->receive_queue);
-
- switch (c3cn->state) {
- case C3CN_STATE_CLOSED:
- case C3CN_STATE_ACTIVE_CLOSE:
- case C3CN_STATE_CLOSE_WAIT_1:
- case C3CN_STATE_CLOSE_WAIT_2:
- case C3CN_STATE_ABORTING:
- /* nothing need to be done */
- break;
- case C3CN_STATE_CONNECTING:
- /* defer until cpl_act_open_rpl or cpl_act_establish */
- c3cn_set_flag(c3cn, C3CN_ACTIVE_CLOSE_NEEDED);
- break;
- case C3CN_STATE_ESTABLISHED:
- close_req = 1;
- c3cn_set_state(c3cn, C3CN_STATE_ACTIVE_CLOSE);
- break;
- case C3CN_STATE_PASSIVE_CLOSE:
- close_req = 1;
- c3cn_set_state(c3cn, C3CN_STATE_CLOSE_WAIT_2);
- break;
- }
-
- if (close_req) {
- if (data_lost)
- /* Unread data was tossed, zap the connection. */
- send_abort_req(c3cn);
- else
- send_close_req(c3cn);
- }
-
- spin_unlock_bh(&c3cn->lock);
- c3cn_put(c3cn);
-}
-
-/**
- * cxgb3i_c3cn_release - close and release an iscsi tcp connection and any
- * resource held
- * @c3cn: the iscsi tcp connection
- */
-void cxgb3i_c3cn_release(struct s3_conn *c3cn)
-{
- c3cn_conn_debug("c3cn 0x%p, s %u, f 0x%lx.\n",
- c3cn, c3cn->state, c3cn->flags);
- if (unlikely(c3cn->state == C3CN_STATE_CONNECTING))
- c3cn_set_flag(c3cn, C3CN_ACTIVE_CLOSE_NEEDED);
- else if (likely(c3cn->state != C3CN_STATE_CLOSED))
- c3cn_active_close(c3cn);
- c3cn_put(c3cn);
-}
-
-static int is_cxgb3_dev(struct net_device *dev)
-{
- struct cxgb3i_sdev_data *cdata;
- struct net_device *ndev = dev;
-
- if (dev->priv_flags & IFF_802_1Q_VLAN)
- ndev = vlan_dev_real_dev(dev);
-
- write_lock(&cdata_rwlock);
- list_for_each_entry(cdata, &cdata_list, list) {
- struct adap_ports *ports = &cdata->ports;
- int i;
-
- for (i = 0; i < ports->nports; i++)
- if (ndev == ports->lldevs[i]) {
- write_unlock(&cdata_rwlock);
- return 1;
- }
- }
- write_unlock(&cdata_rwlock);
- return 0;
-}
-
-/**
- * cxgb3_egress_dev - return the cxgb3 egress device
- * @root_dev: the root device anchoring the search
- * @c3cn: the connection used to determine egress port in bonding mode
- * @context: in bonding mode, indicates a connection set up or failover
- *
- * Return egress device or NULL if the egress device isn't one of our ports.
- */
-static struct net_device *cxgb3_egress_dev(struct net_device *root_dev,
- struct s3_conn *c3cn,
- int context)
-{
- while (root_dev) {
- if (root_dev->priv_flags & IFF_802_1Q_VLAN)
- root_dev = vlan_dev_real_dev(root_dev);
- else if (is_cxgb3_dev(root_dev))
- return root_dev;
- else
- return NULL;
- }
- return NULL;
-}
-
-static struct rtable *find_route(struct net_device *dev,
- __be32 saddr, __be32 daddr,
- __be16 sport, __be16 dport)
-{
- struct rtable *rt;
- struct flowi fl = {
- .oif = dev ? dev->ifindex : 0,
- .nl_u = {
- .ip4_u = {
- .daddr = daddr,
- .saddr = saddr,
- .tos = 0 } },
- .proto = IPPROTO_TCP,
- .uli_u = {
- .ports = {
- .sport = sport,
- .dport = dport } } };
-
- if (ip_route_output_flow(&init_net, &rt, &fl, NULL, 0))
- return NULL;
- return rt;
-}
-
-/*
- * Assign offload parameters to some connection fields.
- */
-static void init_offload_conn(struct s3_conn *c3cn,
- struct t3cdev *cdev,
- struct dst_entry *dst)
-{
- BUG_ON(c3cn->cdev != cdev);
- c3cn->wr_max = c3cn->wr_avail = T3C_DATA(cdev)->max_wrs - 1;
- c3cn->wr_unacked = 0;
- c3cn->mss_idx = select_mss(c3cn, dst_mtu(dst));
-
- reset_wr_list(c3cn);
-}
-
-static int initiate_act_open(struct s3_conn *c3cn, struct net_device *dev)
-{
- struct cxgb3i_sdev_data *cdata = NDEV2CDATA(dev);
- struct t3cdev *cdev = cdata->cdev;
- struct dst_entry *dst = c3cn->dst_cache;
- struct sk_buff *skb;
-
- c3cn_conn_debug("c3cn 0x%p, state %u, flag 0x%lx.\n",
- c3cn, c3cn->state, c3cn->flags);
- /*
- * Initialize connection data. Note that the flags and ULP mode are
- * initialized higher up ...
- */
- c3cn->dev = dev;
- c3cn->cdev = cdev;
- c3cn->tid = cxgb3_alloc_atid(cdev, cdata->client, c3cn);
- if (c3cn->tid < 0)
- goto out_err;
-
- c3cn->qset = 0;
- c3cn->l2t = t3_l2t_get(cdev, dst->neighbour, dev);
- if (!c3cn->l2t)
- goto free_tid;
-
- skb = alloc_skb(sizeof(struct cpl_act_open_req), GFP_KERNEL);
- if (!skb)
- goto free_l2t;
-
- skb->sk = (struct sock *)c3cn;
- set_arp_failure_handler(skb, act_open_req_arp_failure);
-
- c3cn_hold(c3cn);
-
- init_offload_conn(c3cn, cdev, dst);
- c3cn->err = 0;
-
- make_act_open_req(c3cn, skb, c3cn->tid, c3cn->l2t);
- l2t_send(cdev, skb, c3cn->l2t);
- return 0;
-
-free_l2t:
- l2t_release(L2DATA(cdev), c3cn->l2t);
-free_tid:
- s3_free_atid(cdev, c3cn->tid);
- c3cn->tid = 0;
-out_err:
- return -EINVAL;
-}
-
-/**
- * cxgb3i_find_dev - find the interface associated with the given address
- * @ipaddr: ip address
- */
-static struct net_device *
-cxgb3i_find_dev(struct net_device *dev, __be32 ipaddr)
-{
- struct flowi fl;
- int err;
- struct rtable *rt;
-
- memset(&fl, 0, sizeof(fl));
- fl.nl_u.ip4_u.daddr = ipaddr;
-
- err = ip_route_output_key(dev ? dev_net(dev) : &init_net, &rt, &fl);
- if (!err)
- return (&rt->dst)->dev;
-
- return NULL;
-}
-
-/**
- * cxgb3i_c3cn_connect - initiates an iscsi tcp connection to a given address
- * @c3cn: the iscsi tcp connection
- * @usin: destination address
- *
- * return 0 if active open request is sent, < 0 otherwise.
- */
-int cxgb3i_c3cn_connect(struct net_device *dev, struct s3_conn *c3cn,
- struct sockaddr_in *usin)
-{
- struct rtable *rt;
- struct cxgb3i_sdev_data *cdata;
- struct t3cdev *cdev;
- __be32 sipv4;
- struct net_device *dstdev;
- int err;
-
- c3cn_conn_debug("c3cn 0x%p, dev 0x%p.\n", c3cn, dev);
-
- if (usin->sin_family != AF_INET)
- return -EAFNOSUPPORT;
-
- c3cn->daddr.sin_port = usin->sin_port;
- c3cn->daddr.sin_addr.s_addr = usin->sin_addr.s_addr;
-
- dstdev = cxgb3i_find_dev(dev, usin->sin_addr.s_addr);
- if (!dstdev || !is_cxgb3_dev(dstdev))
- return -ENETUNREACH;
-
- if (dstdev->priv_flags & IFF_802_1Q_VLAN)
- dev = dstdev;
-
- rt = find_route(dev, c3cn->saddr.sin_addr.s_addr,
- c3cn->daddr.sin_addr.s_addr,
- c3cn->saddr.sin_port,
- c3cn->daddr.sin_port);
- if (rt == NULL) {
- c3cn_conn_debug("NO route to 0x%x, port %u, dev %s.\n",
- c3cn->daddr.sin_addr.s_addr,
- ntohs(c3cn->daddr.sin_port),
- dev ? dev->name : "any");
- return -ENETUNREACH;
- }
-
- if (rt->rt_flags & (RTCF_MULTICAST | RTCF_BROADCAST)) {
- c3cn_conn_debug("multi-cast route to 0x%x, port %u, dev %s.\n",
- c3cn->daddr.sin_addr.s_addr,
- ntohs(c3cn->daddr.sin_port),
- dev ? dev->name : "any");
- ip_rt_put(rt);
- return -ENETUNREACH;
- }
-
- if (!c3cn->saddr.sin_addr.s_addr)
- c3cn->saddr.sin_addr.s_addr = rt->rt_src;
-
- /* now commit destination to connection */
- c3cn->dst_cache = &rt->dst;
-
- /* try to establish an offloaded connection */
- dev = cxgb3_egress_dev(c3cn->dst_cache->dev, c3cn, 0);
- if (dev == NULL) {
- c3cn_conn_debug("c3cn 0x%p, egress dev NULL.\n", c3cn);
- return -ENETUNREACH;
- }
- cdata = NDEV2CDATA(dev);
- cdev = cdata->cdev;
-
- /* get a source port if one hasn't been provided */
- err = c3cn_get_port(c3cn, cdata);
- if (err)
- return err;
-
- c3cn_conn_debug("c3cn 0x%p get port %u.\n",
- c3cn, ntohs(c3cn->saddr.sin_port));
-
- sipv4 = cxgb3i_get_private_ipv4addr(dev);
- if (!sipv4) {
- c3cn_conn_debug("c3cn 0x%p, iscsi ip not configured.\n", c3cn);
- sipv4 = c3cn->saddr.sin_addr.s_addr;
- cxgb3i_set_private_ipv4addr(dev, sipv4);
- } else
- c3cn->saddr.sin_addr.s_addr = sipv4;
-
- c3cn_conn_debug("c3cn 0x%p, %pI4,%u-%pI4,%u SYN_SENT.\n",
- c3cn,
- &c3cn->saddr.sin_addr.s_addr,
- ntohs(c3cn->saddr.sin_port),
- &c3cn->daddr.sin_addr.s_addr,
- ntohs(c3cn->daddr.sin_port));
-
- c3cn_set_state(c3cn, C3CN_STATE_CONNECTING);
- if (!initiate_act_open(c3cn, dev))
- return 0;
-
- /*
- * If we get here, we don't have an offload connection so simply
- * return a failure.
- */
- err = -ENOTSUPP;
-
- /*
- * This trashes the connection and releases the local port,
- * if necessary.
- */
- c3cn_conn_debug("c3cn 0x%p -> CLOSED.\n", c3cn);
- c3cn_set_state(c3cn, C3CN_STATE_CLOSED);
- ip_rt_put(rt);
- c3cn_put_port(c3cn);
- return err;
-}
-
-/**
- * cxgb3i_c3cn_rx_credits - ack received tcp data.
- * @c3cn: iscsi tcp connection
- * @copied: # of bytes processed
- *
- * Called after some received data has been read. It returns RX credits
- * to the HW for the amount of data processed.
- */
-void cxgb3i_c3cn_rx_credits(struct s3_conn *c3cn, int copied)
-{
- struct t3cdev *cdev;
- int must_send;
- u32 credits, dack = 0;
-
- if (c3cn->state != C3CN_STATE_ESTABLISHED)
- return;
-
- credits = c3cn->copied_seq - c3cn->rcv_wup;
- if (unlikely(!credits))
- return;
-
- cdev = c3cn->cdev;
-
- if (unlikely(cxgb3_rx_credit_thres == 0))
- return;
-
- dack = F_RX_DACK_CHANGE | V_RX_DACK_MODE(1);
-
- /*
- * For coalescing to work effectively ensure the receive window has
- * at least 16KB left.
- */
- must_send = credits + 16384 >= cxgb3_rcv_win;
-
- if (must_send || credits >= cxgb3_rx_credit_thres)
- c3cn->rcv_wup += send_rx_credits(c3cn, credits, dack);
-}
-
-/**
- * cxgb3i_c3cn_send_pdus - send the skbs containing iscsi pdus
- * @c3cn: iscsi tcp connection
- * @skb: skb contains the iscsi pdu
- *
- * Add a list of skbs to a connection send queue. The skbs must comply with
- * the max size limit of the device and have a headroom of at least
- * TX_HEADER_LEN bytes.
- * Return # of bytes queued.
- */
-int cxgb3i_c3cn_send_pdus(struct s3_conn *c3cn, struct sk_buff *skb)
-{
- struct sk_buff *next;
- int err, copied = 0;
-
- spin_lock_bh(&c3cn->lock);
-
- if (c3cn->state != C3CN_STATE_ESTABLISHED) {
- c3cn_tx_debug("c3cn 0x%p, not in est. state %u.\n",
- c3cn, c3cn->state);
- err = -EAGAIN;
- goto out_err;
- }
-
- if (c3cn->err) {
- c3cn_tx_debug("c3cn 0x%p, err %d.\n", c3cn, c3cn->err);
- err = -EPIPE;
- goto out_err;
- }
-
- if (c3cn->write_seq - c3cn->snd_una >= cxgb3_snd_win) {
- c3cn_tx_debug("c3cn 0x%p, snd %u - %u > %u.\n",
- c3cn, c3cn->write_seq, c3cn->snd_una,
- cxgb3_snd_win);
- err = -ENOBUFS;
- goto out_err;
- }
-
- while (skb) {
- int frags = skb_shinfo(skb)->nr_frags +
- (skb->len != skb->data_len);
-
- if (unlikely(skb_headroom(skb) < TX_HEADER_LEN)) {
- c3cn_tx_debug("c3cn 0x%p, skb head.\n", c3cn);
- err = -EINVAL;
- goto out_err;
- }
-
- if (frags >= SKB_WR_LIST_SIZE) {
- cxgb3i_log_error("c3cn 0x%p, tx frags %d, len %u,%u.\n",
- c3cn, skb_shinfo(skb)->nr_frags,
- skb->len, skb->data_len);
- err = -EINVAL;
- goto out_err;
- }
-
- next = skb->next;
- skb->next = NULL;
- skb_entail(c3cn, skb, C3CB_FLAG_NO_APPEND | C3CB_FLAG_NEED_HDR);
- copied += skb->len;
- c3cn->write_seq += skb->len + ulp_extra_len(skb);
- skb = next;
- }
-done:
- if (likely(skb_queue_len(&c3cn->write_queue)))
- c3cn_push_tx_frames(c3cn, 1);
- spin_unlock_bh(&c3cn->lock);
- return copied;
-
-out_err:
- if (copied == 0 && err == -EPIPE)
- copied = c3cn->err ? c3cn->err : -EPIPE;
- else
- copied = err;
- goto done;
-}
-
-static void sdev_data_cleanup(struct cxgb3i_sdev_data *cdata)
-{
- struct adap_ports *ports = &cdata->ports;
- struct s3_conn *c3cn;
- int i;
-
- for (i = 0; i < cxgb3_max_connect; i++) {
- if (cdata->sport_conn[i]) {
- c3cn = cdata->sport_conn[i];
- cdata->sport_conn[i] = NULL;
-
- spin_lock_bh(&c3cn->lock);
- c3cn->cdev = NULL;
- c3cn_set_flag(c3cn, C3CN_OFFLOAD_DOWN);
- c3cn_closed(c3cn);
- spin_unlock_bh(&c3cn->lock);
- }
- }
-
- for (i = 0; i < ports->nports; i++)
- NDEV2CDATA(ports->lldevs[i]) = NULL;
-
- cxgb3i_free_big_mem(cdata);
-}
-
-void cxgb3i_sdev_cleanup(void)
-{
- struct cxgb3i_sdev_data *cdata;
-
- write_lock(&cdata_rwlock);
- list_for_each_entry(cdata, &cdata_list, list) {
- list_del(&cdata->list);
- sdev_data_cleanup(cdata);
- }
- write_unlock(&cdata_rwlock);
-}
-
-int cxgb3i_sdev_init(cxgb3_cpl_handler_func *cpl_handlers)
-{
- cpl_handlers[CPL_ACT_ESTABLISH] = do_act_establish;
- cpl_handlers[CPL_ACT_OPEN_RPL] = do_act_open_rpl;
- cpl_handlers[CPL_PEER_CLOSE] = do_peer_close;
- cpl_handlers[CPL_ABORT_REQ_RSS] = do_abort_req;
- cpl_handlers[CPL_ABORT_RPL_RSS] = do_abort_rpl;
- cpl_handlers[CPL_CLOSE_CON_RPL] = do_close_con_rpl;
- cpl_handlers[CPL_TX_DMA_ACK] = do_wr_ack;
- cpl_handlers[CPL_ISCSI_HDR] = do_iscsi_hdr;
-
- if (cxgb3_max_connect > CXGB3I_MAX_CONN)
- cxgb3_max_connect = CXGB3I_MAX_CONN;
- return 0;
-}
-
-/**
- * cxgb3i_sdev_add - allocate and initialize resources for each adapter found
- * @cdev: t3cdev adapter
- * @client: cxgb3 driver client
- */
-void cxgb3i_sdev_add(struct t3cdev *cdev, struct cxgb3_client *client)
-{
- struct cxgb3i_sdev_data *cdata;
- struct ofld_page_info rx_page_info;
- unsigned int wr_len;
- int mapsize = cxgb3_max_connect * sizeof(struct s3_conn *);
- int i;
-
- cdata = cxgb3i_alloc_big_mem(sizeof(*cdata) + mapsize, GFP_KERNEL);
- if (!cdata) {
- cxgb3i_log_warn("t3dev 0x%p, offload up, OOM %d.\n",
- cdev, mapsize);
- return;
- }
-
- if (cdev->ctl(cdev, GET_WR_LEN, &wr_len) < 0 ||
- cdev->ctl(cdev, GET_PORTS, &cdata->ports) < 0 ||
- cdev->ctl(cdev, GET_RX_PAGE_INFO, &rx_page_info) < 0) {
- cxgb3i_log_warn("t3dev 0x%p, offload up, ioctl failed.\n",
- cdev);
- goto free_cdata;
- }
-
- s3_init_wr_tab(wr_len);
-
- spin_lock_init(&cdata->lock);
- INIT_LIST_HEAD(&cdata->list);
- cdata->cdev = cdev;
- cdata->client = client;
-
- for (i = 0; i < cdata->ports.nports; i++)
- NDEV2CDATA(cdata->ports.lldevs[i]) = cdata;
-
- write_lock(&cdata_rwlock);
- list_add_tail(&cdata->list, &cdata_list);
- write_unlock(&cdata_rwlock);
-
- cxgb3i_log_info("t3dev 0x%p, offload up, added.\n", cdev);
- return;
-
-free_cdata:
- cxgb3i_free_big_mem(cdata);
-}
-
-/**
- * cxgb3i_sdev_remove - free the allocated resources for the adapter
- * @cdev: t3cdev adapter
- */
-void cxgb3i_sdev_remove(struct t3cdev *cdev)
-{
- struct cxgb3i_sdev_data *cdata = CXGB3_SDEV_DATA(cdev);
-
- cxgb3i_log_info("t3dev 0x%p, offload down, remove.\n", cdev);
-
- write_lock(&cdata_rwlock);
- list_del(&cdata->list);
- write_unlock(&cdata_rwlock);
-
- sdev_data_cleanup(cdata);
-}