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Commit e05620073625935290120be93a6214b1b52ae34f

Authored by Yi Zou
Committed by James Bottomley
1 parent b277d2aa9a
Exists in master and in 7 other branches imx_3.0.35_4.1.0, imx_3.10.17_1.0.1_ga, imx_3.10.53_1.1.0_ga, imx_3.14.28_1.0.0_ga, smarc-imx_3.10.53_1.1.0_ga, smarc-imx_3.14.28_1.0.0_ga, smarc-l5.0.0_1.0.0-ga

[SCSI] fcoe: add support to FCoE offload support in fcoe_sw through net_device 

This adds implementation of ddp_setup()/ddp_done() in fcoe_sw for its
fcoe_sw_libfc_fcn_templ.

Signed-off-by: Yi Zou <yi.zou@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

Showing 1 changed file with 38 additions and 0 deletions Inline Diff

drivers/scsi/fcoe/fcoe_sw.c
Diff comments   View file @ e056200
1 /* 1 /*
2 * Copyright(c) 2007 - 2008 Intel Corporation. All rights reserved. 2 * Copyright(c) 2007 - 2008 Intel Corporation. All rights reserved.
3 * 3 *
4 * This program is free software; you can redistribute it and/or modify it 4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License, 5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation. 6 * version 2, as published by the Free Software Foundation.
7 * 7 *
8 * This program is distributed in the hope it will be useful, but WITHOUT 8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
11 * more details. 11 * more details.
12 * 12 *
13 * You should have received a copy of the GNU General Public License along with 13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc., 14 * this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 15 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
16 * 16 *
17 * Maintained at www.Open-FCoE.org 17 * Maintained at www.Open-FCoE.org
18 */ 18 */
19 19
20 #include <linux/module.h> 20 #include <linux/module.h>
21 #include <linux/version.h> 21 #include <linux/version.h>
22 #include <linux/kernel.h> 22 #include <linux/kernel.h>
23 #include <linux/pci.h> 23 #include <linux/pci.h>
24 #include <linux/init.h> 24 #include <linux/init.h>
25 #include <linux/spinlock.h> 25 #include <linux/spinlock.h>
26 #include <linux/netdevice.h> 26 #include <linux/netdevice.h>
27 #include <linux/etherdevice.h> 27 #include <linux/etherdevice.h>
28 #include <linux/if_vlan.h> 28 #include <linux/if_vlan.h>
29 #include <net/rtnetlink.h> 29 #include <net/rtnetlink.h>
30 30
31 #include <scsi/fc/fc_els.h> 31 #include <scsi/fc/fc_els.h>
32 #include <scsi/fc/fc_encaps.h> 32 #include <scsi/fc/fc_encaps.h>
33 #include <scsi/fc/fc_fs.h> 33 #include <scsi/fc/fc_fs.h>
34 #include <scsi/scsi_transport.h> 34 #include <scsi/scsi_transport.h>
35 #include <scsi/scsi_transport_fc.h> 35 #include <scsi/scsi_transport_fc.h>
36 36
37 #include <scsi/libfc.h> 37 #include <scsi/libfc.h>
38 #include <scsi/libfcoe.h> 38 #include <scsi/libfcoe.h>
39 #include <scsi/fc_transport_fcoe.h> 39 #include <scsi/fc_transport_fcoe.h>
40 40
41 #define FCOE_SW_VERSION "0.1" 41 #define FCOE_SW_VERSION "0.1"
42 #define FCOE_SW_NAME "fcoesw" 42 #define FCOE_SW_NAME "fcoesw"
43 #define FCOE_SW_VENDOR "Open-FCoE.org" 43 #define FCOE_SW_VENDOR "Open-FCoE.org"
44 44
45 #define FCOE_MAX_LUN 255 45 #define FCOE_MAX_LUN 255
46 #define FCOE_MAX_FCP_TARGET 256 46 #define FCOE_MAX_FCP_TARGET 256
47 47
48 #define FCOE_MAX_OUTSTANDING_COMMANDS 1024 48 #define FCOE_MAX_OUTSTANDING_COMMANDS 1024
49 49
50 #define FCOE_MIN_XID 0x0001 /* the min xid supported by fcoe_sw */ 50 #define FCOE_MIN_XID 0x0001 /* the min xid supported by fcoe_sw */
51 #define FCOE_MAX_XID 0x07ef /* the max xid supported by fcoe_sw */ 51 #define FCOE_MAX_XID 0x07ef /* the max xid supported by fcoe_sw */
52 52
53 static struct scsi_transport_template *scsi_transport_fcoe_sw; 53 static struct scsi_transport_template *scsi_transport_fcoe_sw;
54 54
55 struct fc_function_template fcoe_sw_transport_function = { 55 struct fc_function_template fcoe_sw_transport_function = {
56 .show_host_node_name = 1, 56 .show_host_node_name = 1,
57 .show_host_port_name = 1, 57 .show_host_port_name = 1,
58 .show_host_supported_classes = 1, 58 .show_host_supported_classes = 1,
59 .show_host_supported_fc4s = 1, 59 .show_host_supported_fc4s = 1,
60 .show_host_active_fc4s = 1, 60 .show_host_active_fc4s = 1,
61 .show_host_maxframe_size = 1, 61 .show_host_maxframe_size = 1,
62 62
63 .show_host_port_id = 1, 63 .show_host_port_id = 1,
64 .show_host_supported_speeds = 1, 64 .show_host_supported_speeds = 1,
65 .get_host_speed = fc_get_host_speed, 65 .get_host_speed = fc_get_host_speed,
66 .show_host_speed = 1, 66 .show_host_speed = 1,
67 .show_host_port_type = 1, 67 .show_host_port_type = 1,
68 .get_host_port_state = fc_get_host_port_state, 68 .get_host_port_state = fc_get_host_port_state,
69 .show_host_port_state = 1, 69 .show_host_port_state = 1,
70 .show_host_symbolic_name = 1, 70 .show_host_symbolic_name = 1,
71 71
72 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), 72 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
73 .show_rport_maxframe_size = 1, 73 .show_rport_maxframe_size = 1,
74 .show_rport_supported_classes = 1, 74 .show_rport_supported_classes = 1,
75 75
76 .show_host_fabric_name = 1, 76 .show_host_fabric_name = 1,
77 .show_starget_node_name = 1, 77 .show_starget_node_name = 1,
78 .show_starget_port_name = 1, 78 .show_starget_port_name = 1,
79 .show_starget_port_id = 1, 79 .show_starget_port_id = 1,
80 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, 80 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
81 .show_rport_dev_loss_tmo = 1, 81 .show_rport_dev_loss_tmo = 1,
82 .get_fc_host_stats = fc_get_host_stats, 82 .get_fc_host_stats = fc_get_host_stats,
83 .issue_fc_host_lip = fcoe_reset, 83 .issue_fc_host_lip = fcoe_reset,
84 84
85 .terminate_rport_io = fc_rport_terminate_io, 85 .terminate_rport_io = fc_rport_terminate_io,
86 }; 86 };
87 87
88 static struct scsi_host_template fcoe_sw_shost_template = { 88 static struct scsi_host_template fcoe_sw_shost_template = {
89 .module = THIS_MODULE, 89 .module = THIS_MODULE,
90 .name = "FCoE Driver", 90 .name = "FCoE Driver",
91 .proc_name = FCOE_SW_NAME, 91 .proc_name = FCOE_SW_NAME,
92 .queuecommand = fc_queuecommand, 92 .queuecommand = fc_queuecommand,
93 .eh_abort_handler = fc_eh_abort, 93 .eh_abort_handler = fc_eh_abort,
94 .eh_device_reset_handler = fc_eh_device_reset, 94 .eh_device_reset_handler = fc_eh_device_reset,
95 .eh_host_reset_handler = fc_eh_host_reset, 95 .eh_host_reset_handler = fc_eh_host_reset,
96 .slave_alloc = fc_slave_alloc, 96 .slave_alloc = fc_slave_alloc,
97 .change_queue_depth = fc_change_queue_depth, 97 .change_queue_depth = fc_change_queue_depth,
98 .change_queue_type = fc_change_queue_type, 98 .change_queue_type = fc_change_queue_type,
99 .this_id = -1, 99 .this_id = -1,
100 .cmd_per_lun = 32, 100 .cmd_per_lun = 32,
101 .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS, 101 .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS,
102 .use_clustering = ENABLE_CLUSTERING, 102 .use_clustering = ENABLE_CLUSTERING,
103 .sg_tablesize = SG_ALL, 103 .sg_tablesize = SG_ALL,
104 .max_sectors = 0xffff, 104 .max_sectors = 0xffff,
105 }; 105 };
106 106
107 /** 107 /**
108 * fcoe_sw_lport_config() - sets up the fc_lport 108 * fcoe_sw_lport_config() - sets up the fc_lport
109 * @lp: ptr to the fc_lport 109 * @lp: ptr to the fc_lport
110 * @shost: ptr to the parent scsi host 110 * @shost: ptr to the parent scsi host
111 * 111 *
112 * Returns: 0 for success 112 * Returns: 0 for success
113 */ 113 */
114 static int fcoe_sw_lport_config(struct fc_lport *lp) 114 static int fcoe_sw_lport_config(struct fc_lport *lp)
115 { 115 {
116 int i = 0; 116 int i = 0;
117 117
118 lp->link_up = 0; 118 lp->link_up = 0;
119 lp->qfull = 0; 119 lp->qfull = 0;
120 lp->max_retry_count = 3; 120 lp->max_retry_count = 3;
121 lp->e_d_tov = 2 * 1000; /* FC-FS default */ 121 lp->e_d_tov = 2 * 1000; /* FC-FS default */
122 lp->r_a_tov = 2 * 2 * 1000; 122 lp->r_a_tov = 2 * 2 * 1000;
123 lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS | 123 lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
124 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL); 124 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
125 125
126 /* 126 /*
127 * allocate per cpu stats block 127 * allocate per cpu stats block
128 */ 128 */
129 for_each_online_cpu(i) 129 for_each_online_cpu(i)
130 lp->dev_stats[i] = kzalloc(sizeof(struct fcoe_dev_stats), 130 lp->dev_stats[i] = kzalloc(sizeof(struct fcoe_dev_stats),
131 GFP_KERNEL); 131 GFP_KERNEL);
132 132
133 /* lport fc_lport related configuration */ 133 /* lport fc_lport related configuration */
134 fc_lport_config(lp); 134 fc_lport_config(lp);
135 135
136 /* offload related configuration */ 136 /* offload related configuration */
137 lp->crc_offload = 0; 137 lp->crc_offload = 0;
138 lp->seq_offload = 0; 138 lp->seq_offload = 0;
139 lp->lro_enabled = 0; 139 lp->lro_enabled = 0;
140 lp->lro_xid = 0; 140 lp->lro_xid = 0;
141 lp->lso_max = 0; 141 lp->lso_max = 0;
142 142
143 return 0; 143 return 0;
144 } 144 }
145 145
146 /** 146 /**
147 * fcoe_sw_netdev_config() - Set up netdev for SW FCoE 147 * fcoe_sw_netdev_config() - Set up netdev for SW FCoE
148 * @lp : ptr to the fc_lport 148 * @lp : ptr to the fc_lport
149 * @netdev : ptr to the associated netdevice struct 149 * @netdev : ptr to the associated netdevice struct
150 * 150 *
151 * Must be called after fcoe_sw_lport_config() as it will use lport mutex 151 * Must be called after fcoe_sw_lport_config() as it will use lport mutex
152 * 152 *
153 * Returns : 0 for success 153 * Returns : 0 for success
154 */ 154 */
155 static int fcoe_sw_netdev_config(struct fc_lport *lp, struct net_device *netdev) 155 static int fcoe_sw_netdev_config(struct fc_lport *lp, struct net_device *netdev)
156 { 156 {
157 u32 mfs; 157 u32 mfs;
158 u64 wwnn, wwpn; 158 u64 wwnn, wwpn;
159 struct fcoe_softc *fc; 159 struct fcoe_softc *fc;
160 u8 flogi_maddr[ETH_ALEN]; 160 u8 flogi_maddr[ETH_ALEN];
161 161
162 /* Setup lport private data to point to fcoe softc */ 162 /* Setup lport private data to point to fcoe softc */
163 fc = lport_priv(lp); 163 fc = lport_priv(lp);
164 fc->lp = lp; 164 fc->lp = lp;
165 fc->real_dev = netdev; 165 fc->real_dev = netdev;
166 fc->phys_dev = netdev; 166 fc->phys_dev = netdev;
167 167
168 /* Require support for get_pauseparam ethtool op. */ 168 /* Require support for get_pauseparam ethtool op. */
169 if (netdev->priv_flags & IFF_802_1Q_VLAN) 169 if (netdev->priv_flags & IFF_802_1Q_VLAN)
170 fc->phys_dev = vlan_dev_real_dev(netdev); 170 fc->phys_dev = vlan_dev_real_dev(netdev);
171 171
172 /* Do not support for bonding device */ 172 /* Do not support for bonding device */
173 if ((fc->real_dev->priv_flags & IFF_MASTER_ALB) || 173 if ((fc->real_dev->priv_flags & IFF_MASTER_ALB) ||
174 (fc->real_dev->priv_flags & IFF_SLAVE_INACTIVE) || 174 (fc->real_dev->priv_flags & IFF_SLAVE_INACTIVE) ||
175 (fc->real_dev->priv_flags & IFF_MASTER_8023AD)) { 175 (fc->real_dev->priv_flags & IFF_MASTER_8023AD)) {
176 return -EOPNOTSUPP; 176 return -EOPNOTSUPP;
177 } 177 }
178 178
179 /* 179 /*
180 * Determine max frame size based on underlying device and optional 180 * Determine max frame size based on underlying device and optional
181 * user-configured limit. If the MFS is too low, fcoe_link_ok() 181 * user-configured limit. If the MFS is too low, fcoe_link_ok()
182 * will return 0, so do this first. 182 * will return 0, so do this first.
183 */ 183 */
184 mfs = fc->real_dev->mtu - (sizeof(struct fcoe_hdr) + 184 mfs = fc->real_dev->mtu - (sizeof(struct fcoe_hdr) +
185 sizeof(struct fcoe_crc_eof)); 185 sizeof(struct fcoe_crc_eof));
186 if (fc_set_mfs(lp, mfs)) 186 if (fc_set_mfs(lp, mfs))
187 return -EINVAL; 187 return -EINVAL;
188 188
189 if (!fcoe_link_ok(lp)) 189 if (!fcoe_link_ok(lp))
190 lp->link_up = 1; 190 lp->link_up = 1;
191 191
192 /* offload features support */ 192 /* offload features support */
193 if (fc->real_dev->features & NETIF_F_SG) 193 if (fc->real_dev->features & NETIF_F_SG)
194 lp->sg_supp = 1; 194 lp->sg_supp = 1;
195 195
196 #ifdef NETIF_F_FCOE_CRC 196 #ifdef NETIF_F_FCOE_CRC
197 if (netdev->features & NETIF_F_FCOE_CRC) { 197 if (netdev->features & NETIF_F_FCOE_CRC) {
198 lp->crc_offload = 1; 198 lp->crc_offload = 1;
199 printk(KERN_DEBUG "fcoe:%s supports FCCRC offload\n", 199 printk(KERN_DEBUG "fcoe:%s supports FCCRC offload\n",
200 netdev->name); 200 netdev->name);
201 } 201 }
202 #endif 202 #endif
203 #ifdef NETIF_F_FSO 203 #ifdef NETIF_F_FSO
204 if (netdev->features & NETIF_F_FSO) { 204 if (netdev->features & NETIF_F_FSO) {
205 lp->seq_offload = 1; 205 lp->seq_offload = 1;
206 lp->lso_max = netdev->gso_max_size; 206 lp->lso_max = netdev->gso_max_size;
207 printk(KERN_DEBUG "fcoe:%s supports LSO for max len 0x%x\n", 207 printk(KERN_DEBUG "fcoe:%s supports LSO for max len 0x%x\n",
208 netdev->name, lp->lso_max); 208 netdev->name, lp->lso_max);
209 } 209 }
210 #endif 210 #endif
211 if (netdev->fcoe_ddp_xid) { 211 if (netdev->fcoe_ddp_xid) {
212 lp->lro_enabled = 1; 212 lp->lro_enabled = 1;
213 lp->lro_xid = netdev->fcoe_ddp_xid; 213 lp->lro_xid = netdev->fcoe_ddp_xid;
214 printk(KERN_DEBUG "fcoe:%s supports LRO for max xid 0x%x\n", 214 printk(KERN_DEBUG "fcoe:%s supports LRO for max xid 0x%x\n",
215 netdev->name, lp->lro_xid); 215 netdev->name, lp->lro_xid);
216 } 216 }
217 skb_queue_head_init(&fc->fcoe_pending_queue); 217 skb_queue_head_init(&fc->fcoe_pending_queue);
218 fc->fcoe_pending_queue_active = 0; 218 fc->fcoe_pending_queue_active = 0;
219 219
220 /* setup Source Mac Address */ 220 /* setup Source Mac Address */
221 memcpy(fc->ctl_src_addr, fc->real_dev->dev_addr, 221 memcpy(fc->ctl_src_addr, fc->real_dev->dev_addr,
222 fc->real_dev->addr_len); 222 fc->real_dev->addr_len);
223 223
224 wwnn = fcoe_wwn_from_mac(fc->real_dev->dev_addr, 1, 0); 224 wwnn = fcoe_wwn_from_mac(fc->real_dev->dev_addr, 1, 0);
225 fc_set_wwnn(lp, wwnn); 225 fc_set_wwnn(lp, wwnn);
226 /* XXX - 3rd arg needs to be vlan id */ 226 /* XXX - 3rd arg needs to be vlan id */
227 wwpn = fcoe_wwn_from_mac(fc->real_dev->dev_addr, 2, 0); 227 wwpn = fcoe_wwn_from_mac(fc->real_dev->dev_addr, 2, 0);
228 fc_set_wwpn(lp, wwpn); 228 fc_set_wwpn(lp, wwpn);
229 229
230 /* 230 /*
231 * Add FCoE MAC address as second unicast MAC address 231 * Add FCoE MAC address as second unicast MAC address
232 * or enter promiscuous mode if not capable of listening 232 * or enter promiscuous mode if not capable of listening
233 * for multiple unicast MACs. 233 * for multiple unicast MACs.
234 */ 234 */
235 rtnl_lock(); 235 rtnl_lock();
236 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); 236 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
237 dev_unicast_add(fc->real_dev, flogi_maddr, ETH_ALEN); 237 dev_unicast_add(fc->real_dev, flogi_maddr, ETH_ALEN);
238 rtnl_unlock(); 238 rtnl_unlock();
239 239
240 /* 240 /*
241 * setup the receive function from ethernet driver 241 * setup the receive function from ethernet driver
242 * on the ethertype for the given device 242 * on the ethertype for the given device
243 */ 243 */
244 fc->fcoe_packet_type.func = fcoe_rcv; 244 fc->fcoe_packet_type.func = fcoe_rcv;
245 fc->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE); 245 fc->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE);
246 fc->fcoe_packet_type.dev = fc->real_dev; 246 fc->fcoe_packet_type.dev = fc->real_dev;
247 dev_add_pack(&fc->fcoe_packet_type); 247 dev_add_pack(&fc->fcoe_packet_type);
248 248
249 return 0; 249 return 0;
250 } 250 }
251 251
252 /** 252 /**
253 * fcoe_sw_shost_config() - Sets up fc_lport->host 253 * fcoe_sw_shost_config() - Sets up fc_lport->host
254 * @lp : ptr to the fc_lport 254 * @lp : ptr to the fc_lport
255 * @shost : ptr to the associated scsi host 255 * @shost : ptr to the associated scsi host
256 * @dev : device associated to scsi host 256 * @dev : device associated to scsi host
257 * 257 *
258 * Must be called after fcoe_sw_lport_config() and fcoe_sw_netdev_config() 258 * Must be called after fcoe_sw_lport_config() and fcoe_sw_netdev_config()
259 * 259 *
260 * Returns : 0 for success 260 * Returns : 0 for success
261 */ 261 */
262 static int fcoe_sw_shost_config(struct fc_lport *lp, struct Scsi_Host *shost, 262 static int fcoe_sw_shost_config(struct fc_lport *lp, struct Scsi_Host *shost,
263 struct device *dev) 263 struct device *dev)
264 { 264 {
265 int rc = 0; 265 int rc = 0;
266 266
267 /* lport scsi host config */ 267 /* lport scsi host config */
268 lp->host = shost; 268 lp->host = shost;
269 269
270 lp->host->max_lun = FCOE_MAX_LUN; 270 lp->host->max_lun = FCOE_MAX_LUN;
271 lp->host->max_id = FCOE_MAX_FCP_TARGET; 271 lp->host->max_id = FCOE_MAX_FCP_TARGET;
272 lp->host->max_channel = 0; 272 lp->host->max_channel = 0;
273 lp->host->transportt = scsi_transport_fcoe_sw; 273 lp->host->transportt = scsi_transport_fcoe_sw;
274 274
275 /* add the new host to the SCSI-ml */ 275 /* add the new host to the SCSI-ml */
276 rc = scsi_add_host(lp->host, dev); 276 rc = scsi_add_host(lp->host, dev);
277 if (rc) { 277 if (rc) {
278 FC_DBG("fcoe_sw_shost_config:error on scsi_add_host\n"); 278 FC_DBG("fcoe_sw_shost_config:error on scsi_add_host\n");
279 return rc; 279 return rc;
280 } 280 }
281 sprintf(fc_host_symbolic_name(lp->host), "%s v%s over %s", 281 sprintf(fc_host_symbolic_name(lp->host), "%s v%s over %s",
282 FCOE_SW_NAME, FCOE_SW_VERSION, 282 FCOE_SW_NAME, FCOE_SW_VERSION,
283 fcoe_netdev(lp)->name); 283 fcoe_netdev(lp)->name);
284 284
285 return 0; 285 return 0;
286 } 286 }
287 287
288 /** 288 /**
289 * fcoe_sw_em_config() - allocates em for this lport 289 * fcoe_sw_em_config() - allocates em for this lport
290 * @lp: the port that em is to allocated for 290 * @lp: the port that em is to allocated for
291 * 291 *
292 * Returns : 0 on success 292 * Returns : 0 on success
293 */ 293 */
294 static inline int fcoe_sw_em_config(struct fc_lport *lp) 294 static inline int fcoe_sw_em_config(struct fc_lport *lp)
295 { 295 {
296 BUG_ON(lp->emp); 296 BUG_ON(lp->emp);
297 297
298 lp->emp = fc_exch_mgr_alloc(lp, FC_CLASS_3, 298 lp->emp = fc_exch_mgr_alloc(lp, FC_CLASS_3,
299 FCOE_MIN_XID, FCOE_MAX_XID); 299 FCOE_MIN_XID, FCOE_MAX_XID);
300 if (!lp->emp) 300 if (!lp->emp)
301 return -ENOMEM; 301 return -ENOMEM;
302 302
303 return 0; 303 return 0;
304 } 304 }
305 305
306 /** 306 /**
307 * fcoe_sw_destroy() - FCoE software HBA tear-down function 307 * fcoe_sw_destroy() - FCoE software HBA tear-down function
308 * @netdev: ptr to the associated net_device 308 * @netdev: ptr to the associated net_device
309 * 309 *
310 * Returns: 0 if link is OK for use by FCoE. 310 * Returns: 0 if link is OK for use by FCoE.
311 */ 311 */
312 static int fcoe_sw_destroy(struct net_device *netdev) 312 static int fcoe_sw_destroy(struct net_device *netdev)
313 { 313 {
314 int cpu; 314 int cpu;
315 struct fc_lport *lp = NULL; 315 struct fc_lport *lp = NULL;
316 struct fcoe_softc *fc; 316 struct fcoe_softc *fc;
317 u8 flogi_maddr[ETH_ALEN]; 317 u8 flogi_maddr[ETH_ALEN];
318 318
319 BUG_ON(!netdev); 319 BUG_ON(!netdev);
320 320
321 printk(KERN_DEBUG "fcoe_sw_destroy:interface on %s\n", 321 printk(KERN_DEBUG "fcoe_sw_destroy:interface on %s\n",
322 netdev->name); 322 netdev->name);
323 323
324 lp = fcoe_hostlist_lookup(netdev); 324 lp = fcoe_hostlist_lookup(netdev);
325 if (!lp) 325 if (!lp)
326 return -ENODEV; 326 return -ENODEV;
327 327
328 fc = lport_priv(lp); 328 fc = lport_priv(lp);
329 329
330 /* Logout of the fabric */ 330 /* Logout of the fabric */
331 fc_fabric_logoff(lp); 331 fc_fabric_logoff(lp);
332 332
333 /* Remove the instance from fcoe's list */ 333 /* Remove the instance from fcoe's list */
334 fcoe_hostlist_remove(lp); 334 fcoe_hostlist_remove(lp);
335 335
336 /* Don't listen for Ethernet packets anymore */ 336 /* Don't listen for Ethernet packets anymore */
337 dev_remove_pack(&fc->fcoe_packet_type); 337 dev_remove_pack(&fc->fcoe_packet_type);
338 338
339 /* Cleanup the fc_lport */ 339 /* Cleanup the fc_lport */
340 fc_lport_destroy(lp); 340 fc_lport_destroy(lp);
341 fc_fcp_destroy(lp); 341 fc_fcp_destroy(lp);
342 342
343 /* Detach from the scsi-ml */ 343 /* Detach from the scsi-ml */
344 fc_remove_host(lp->host); 344 fc_remove_host(lp->host);
345 scsi_remove_host(lp->host); 345 scsi_remove_host(lp->host);
346 346
347 /* There are no more rports or I/O, free the EM */ 347 /* There are no more rports or I/O, free the EM */
348 if (lp->emp) 348 if (lp->emp)
349 fc_exch_mgr_free(lp->emp); 349 fc_exch_mgr_free(lp->emp);
350 350
351 /* Delete secondary MAC addresses */ 351 /* Delete secondary MAC addresses */
352 rtnl_lock(); 352 rtnl_lock();
353 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); 353 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
354 dev_unicast_delete(fc->real_dev, flogi_maddr, ETH_ALEN); 354 dev_unicast_delete(fc->real_dev, flogi_maddr, ETH_ALEN);
355 if (compare_ether_addr(fc->data_src_addr, (u8[6]) { 0 })) 355 if (compare_ether_addr(fc->data_src_addr, (u8[6]) { 0 }))
356 dev_unicast_delete(fc->real_dev, fc->data_src_addr, ETH_ALEN); 356 dev_unicast_delete(fc->real_dev, fc->data_src_addr, ETH_ALEN);
357 rtnl_unlock(); 357 rtnl_unlock();
358 358
359 /* Free the per-CPU revieve threads */ 359 /* Free the per-CPU revieve threads */
360 fcoe_percpu_clean(lp); 360 fcoe_percpu_clean(lp);
361 361
362 /* Free existing skbs */ 362 /* Free existing skbs */
363 fcoe_clean_pending_queue(lp); 363 fcoe_clean_pending_queue(lp);
364 364
365 /* Free memory used by statistical counters */ 365 /* Free memory used by statistical counters */
366 for_each_online_cpu(cpu) 366 for_each_online_cpu(cpu)
367 kfree(lp->dev_stats[cpu]); 367 kfree(lp->dev_stats[cpu]);
368 368
369 /* Release the net_device and Scsi_Host */ 369 /* Release the net_device and Scsi_Host */
370 dev_put(fc->real_dev); 370 dev_put(fc->real_dev);
371 scsi_host_put(lp->host); 371 scsi_host_put(lp->host);
372 372
373 return 0; 373 return 0;
374 } 374 }
375 375
376 /*
377 * fcoe_sw_ddp_setup - calls LLD's ddp_setup through net_device
378 * @lp: the corresponding fc_lport
379 * @xid: the exchange id for this ddp transfer
380 * @sgl: the scatterlist describing this transfer
381 * @sgc: number of sg items
382 *
383 * Returns : 0 no ddp
384 */
385 static int fcoe_sw_ddp_setup(struct fc_lport *lp, u16 xid,
386 struct scatterlist *sgl, unsigned int sgc)
387 {
388 struct net_device *n = fcoe_netdev(lp);
389
390 if (n->netdev_ops && n->netdev_ops->ndo_fcoe_ddp_setup)
391 return n->netdev_ops->ndo_fcoe_ddp_setup(n, xid, sgl, sgc);
392
393 return 0;
394 }
395
396 /*
397 * fcoe_sw_ddp_done - calls LLD's ddp_done through net_device
398 * @lp: the corresponding fc_lport
399 * @xid: the exchange id for this ddp transfer
400 *
401 * Returns : the length of data that have been completed by ddp
402 */
403 static int fcoe_sw_ddp_done(struct fc_lport *lp, u16 xid)
404 {
405 struct net_device *n = fcoe_netdev(lp);
406
407 if (n->netdev_ops && n->netdev_ops->ndo_fcoe_ddp_done)
408 return n->netdev_ops->ndo_fcoe_ddp_done(n, xid);
409 return 0;
410 }
411
376 static struct libfc_function_template fcoe_sw_libfc_fcn_templ = { 412 static struct libfc_function_template fcoe_sw_libfc_fcn_templ = {
377 .frame_send = fcoe_xmit, 413 .frame_send = fcoe_xmit,
414 .ddp_setup = fcoe_sw_ddp_setup,
415 .ddp_done = fcoe_sw_ddp_done,
378 }; 416 };
379 417
380 /** 418 /**
381 * fcoe_sw_create() - this function creates the fcoe interface 419 * fcoe_sw_create() - this function creates the fcoe interface
382 * @netdev: pointer the associated netdevice 420 * @netdev: pointer the associated netdevice
383 * 421 *
384 * Creates fc_lport struct and scsi_host for lport, configures lport 422 * Creates fc_lport struct and scsi_host for lport, configures lport
385 * and starts fabric login. 423 * and starts fabric login.
386 * 424 *
387 * Returns : 0 on success 425 * Returns : 0 on success
388 */ 426 */
389 static int fcoe_sw_create(struct net_device *netdev) 427 static int fcoe_sw_create(struct net_device *netdev)
390 { 428 {
391 int rc; 429 int rc;
392 struct fc_lport *lp = NULL; 430 struct fc_lport *lp = NULL;
393 struct fcoe_softc *fc; 431 struct fcoe_softc *fc;
394 struct Scsi_Host *shost; 432 struct Scsi_Host *shost;
395 433
396 BUG_ON(!netdev); 434 BUG_ON(!netdev);
397 435
398 printk(KERN_DEBUG "fcoe_sw_create:interface on %s\n", 436 printk(KERN_DEBUG "fcoe_sw_create:interface on %s\n",
399 netdev->name); 437 netdev->name);
400 438
401 lp = fcoe_hostlist_lookup(netdev); 439 lp = fcoe_hostlist_lookup(netdev);
402 if (lp) 440 if (lp)
403 return -EEXIST; 441 return -EEXIST;
404 442
405 shost = fcoe_host_alloc(&fcoe_sw_shost_template, 443 shost = fcoe_host_alloc(&fcoe_sw_shost_template,
406 sizeof(struct fcoe_softc)); 444 sizeof(struct fcoe_softc));
407 if (!shost) { 445 if (!shost) {
408 FC_DBG("Could not allocate host structure\n"); 446 FC_DBG("Could not allocate host structure\n");
409 return -ENOMEM; 447 return -ENOMEM;
410 } 448 }
411 lp = shost_priv(shost); 449 lp = shost_priv(shost);
412 fc = lport_priv(lp); 450 fc = lport_priv(lp);
413 451
414 /* configure fc_lport, e.g., em */ 452 /* configure fc_lport, e.g., em */
415 rc = fcoe_sw_lport_config(lp); 453 rc = fcoe_sw_lport_config(lp);
416 if (rc) { 454 if (rc) {
417 FC_DBG("Could not configure lport\n"); 455 FC_DBG("Could not configure lport\n");
418 goto out_host_put; 456 goto out_host_put;
419 } 457 }
420 458
421 /* configure lport network properties */ 459 /* configure lport network properties */
422 rc = fcoe_sw_netdev_config(lp, netdev); 460 rc = fcoe_sw_netdev_config(lp, netdev);
423 if (rc) { 461 if (rc) {
424 FC_DBG("Could not configure netdev for lport\n"); 462 FC_DBG("Could not configure netdev for lport\n");
425 goto out_host_put; 463 goto out_host_put;
426 } 464 }
427 465
428 /* configure lport scsi host properties */ 466 /* configure lport scsi host properties */
429 rc = fcoe_sw_shost_config(lp, shost, &netdev->dev); 467 rc = fcoe_sw_shost_config(lp, shost, &netdev->dev);
430 if (rc) { 468 if (rc) {
431 FC_DBG("Could not configure shost for lport\n"); 469 FC_DBG("Could not configure shost for lport\n");
432 goto out_host_put; 470 goto out_host_put;
433 } 471 }
434 472
435 /* lport exch manager allocation */ 473 /* lport exch manager allocation */
436 rc = fcoe_sw_em_config(lp); 474 rc = fcoe_sw_em_config(lp);
437 if (rc) { 475 if (rc) {
438 FC_DBG("Could not configure em for lport\n"); 476 FC_DBG("Could not configure em for lport\n");
439 goto out_host_put; 477 goto out_host_put;
440 } 478 }
441 479
442 /* Initialize the library */ 480 /* Initialize the library */
443 rc = fcoe_libfc_config(lp, &fcoe_sw_libfc_fcn_templ); 481 rc = fcoe_libfc_config(lp, &fcoe_sw_libfc_fcn_templ);
444 if (rc) { 482 if (rc) {
445 FC_DBG("Could not configure libfc for lport!\n"); 483 FC_DBG("Could not configure libfc for lport!\n");
446 goto out_lp_destroy; 484 goto out_lp_destroy;
447 } 485 }
448 486
449 /* add to lports list */ 487 /* add to lports list */
450 fcoe_hostlist_add(lp); 488 fcoe_hostlist_add(lp);
451 489
452 lp->boot_time = jiffies; 490 lp->boot_time = jiffies;
453 491
454 fc_fabric_login(lp); 492 fc_fabric_login(lp);
455 493
456 dev_hold(netdev); 494 dev_hold(netdev);
457 495
458 return rc; 496 return rc;
459 497
460 out_lp_destroy: 498 out_lp_destroy:
461 fc_exch_mgr_free(lp->emp); /* Free the EM */ 499 fc_exch_mgr_free(lp->emp); /* Free the EM */
462 out_host_put: 500 out_host_put:
463 scsi_host_put(lp->host); 501 scsi_host_put(lp->host);
464 return rc; 502 return rc;
465 } 503 }
466 504
467 /** 505 /**
468 * fcoe_sw_match() - The FCoE SW transport match function 506 * fcoe_sw_match() - The FCoE SW transport match function
469 * 507 *
470 * Returns : false always 508 * Returns : false always
471 */ 509 */
472 static bool fcoe_sw_match(struct net_device *netdev) 510 static bool fcoe_sw_match(struct net_device *netdev)
473 { 511 {
474 /* FIXME - for sw transport, always return false */ 512 /* FIXME - for sw transport, always return false */
475 return false; 513 return false;
476 } 514 }
477 515
478 /* the sw hba fcoe transport */ 516 /* the sw hba fcoe transport */
479 struct fcoe_transport fcoe_sw_transport = { 517 struct fcoe_transport fcoe_sw_transport = {
480 .name = "fcoesw", 518 .name = "fcoesw",
481 .create = fcoe_sw_create, 519 .create = fcoe_sw_create,
482 .destroy = fcoe_sw_destroy, 520 .destroy = fcoe_sw_destroy,
483 .match = fcoe_sw_match, 521 .match = fcoe_sw_match,
484 .vendor = 0x0, 522 .vendor = 0x0,
485 .device = 0xffff, 523 .device = 0xffff,
486 }; 524 };
487 525
488 /** 526 /**
489 * fcoe_sw_init() - Registers fcoe_sw_transport 527 * fcoe_sw_init() - Registers fcoe_sw_transport
490 * 528 *
491 * Returns : 0 on success 529 * Returns : 0 on success
492 */ 530 */
493 int __init fcoe_sw_init(void) 531 int __init fcoe_sw_init(void)
494 { 532 {
495 /* attach to scsi transport */ 533 /* attach to scsi transport */
496 scsi_transport_fcoe_sw = 534 scsi_transport_fcoe_sw =
497 fc_attach_transport(&fcoe_sw_transport_function); 535 fc_attach_transport(&fcoe_sw_transport_function);
498 536
499 if (!scsi_transport_fcoe_sw) { 537 if (!scsi_transport_fcoe_sw) {
500 printk(KERN_ERR "fcoe_sw_init:fc_attach_transport() failed\n"); 538 printk(KERN_ERR "fcoe_sw_init:fc_attach_transport() failed\n");
501 return -ENODEV; 539 return -ENODEV;
502 } 540 }
503 541
504 mutex_init(&fcoe_sw_transport.devlock); 542 mutex_init(&fcoe_sw_transport.devlock);
505 INIT_LIST_HEAD(&fcoe_sw_transport.devlist); 543 INIT_LIST_HEAD(&fcoe_sw_transport.devlist);
506 544
507 /* register sw transport */ 545 /* register sw transport */
508 fcoe_transport_register(&fcoe_sw_transport); 546 fcoe_transport_register(&fcoe_sw_transport);
509 return 0; 547 return 0;
510 } 548 }
511 549
512 /** 550 /**
513 * fcoe_sw_exit() - Unregisters fcoe_sw_transport 551 * fcoe_sw_exit() - Unregisters fcoe_sw_transport
514 * 552 *
515 * Returns : 0 on success 553 * Returns : 0 on success
516 */ 554 */
517 int __exit fcoe_sw_exit(void) 555 int __exit fcoe_sw_exit(void)
518 { 556 {
519 /* dettach the transport */ 557 /* dettach the transport */
520 fc_release_transport(scsi_transport_fcoe_sw); 558 fc_release_transport(scsi_transport_fcoe_sw);
521 fcoe_transport_unregister(&fcoe_sw_transport); 559 fcoe_transport_unregister(&fcoe_sw_transport);
522 return 0; 560 return 0;
523 } 561 }
524 562