1 // SPDX-License-Identifier: GPL-2.0 1 // SPDX-License-Identifier: GPL-2.0
2 /* Shared Memory Communications Direct over IS 2 /* Shared Memory Communications Direct over ISM devices (SMC-D)
3 * 3 *
4 * Functions for ISM device. 4 * Functions for ISM device.
5 * 5 *
6 * Copyright IBM Corp. 2018 6 * Copyright IBM Corp. 2018
7 */ 7 */
8 8
9 #include <linux/if_vlan.h> 9 #include <linux/if_vlan.h>
10 #include <linux/spinlock.h> 10 #include <linux/spinlock.h>
11 #include <linux/mutex.h> 11 #include <linux/mutex.h>
12 #include <linux/slab.h> 12 #include <linux/slab.h>
13 #include <asm/page.h> 13 #include <asm/page.h>
14 14
15 #include "smc.h" 15 #include "smc.h"
16 #include "smc_core.h" 16 #include "smc_core.h"
17 #include "smc_ism.h" 17 #include "smc_ism.h"
18 #include "smc_pnet.h" 18 #include "smc_pnet.h"
19 #include "smc_netlink.h" 19 #include "smc_netlink.h"
20 #include "linux/ism.h" 20 #include "linux/ism.h"
21 21
22 struct smcd_dev_list smcd_dev_list = { 22 struct smcd_dev_list smcd_dev_list = {
23 .list = LIST_HEAD_INIT(smcd_dev_list.l 23 .list = LIST_HEAD_INIT(smcd_dev_list.list),
24 .mutex = __MUTEX_INITIALIZER(smcd_dev_ 24 .mutex = __MUTEX_INITIALIZER(smcd_dev_list.mutex)
25 }; 25 };
26 26
27 static bool smc_ism_v2_capable; 27 static bool smc_ism_v2_capable;
28 static u8 smc_ism_v2_system_eid[SMC_MAX_EID_LE 28 static u8 smc_ism_v2_system_eid[SMC_MAX_EID_LEN];
29 29
30 #if IS_ENABLED(CONFIG_ISM) 30 #if IS_ENABLED(CONFIG_ISM)
31 static void smcd_register_dev(struct ism_dev * 31 static void smcd_register_dev(struct ism_dev *ism);
32 static void smcd_unregister_dev(struct ism_dev 32 static void smcd_unregister_dev(struct ism_dev *ism);
33 static void smcd_handle_event(struct ism_dev * 33 static void smcd_handle_event(struct ism_dev *ism, struct ism_event *event);
34 static void smcd_handle_irq(struct ism_dev *is 34 static void smcd_handle_irq(struct ism_dev *ism, unsigned int dmbno,
35 u16 dmbemask); 35 u16 dmbemask);
36 36
37 static struct ism_client smc_ism_client = { 37 static struct ism_client smc_ism_client = {
38 .name = "SMC-D", 38 .name = "SMC-D",
39 .add = smcd_register_dev, 39 .add = smcd_register_dev,
40 .remove = smcd_unregister_dev, 40 .remove = smcd_unregister_dev,
41 .handle_event = smcd_handle_event, 41 .handle_event = smcd_handle_event,
42 .handle_irq = smcd_handle_irq, 42 .handle_irq = smcd_handle_irq,
43 }; 43 };
44 #endif 44 #endif
45 45
46 static void smc_ism_create_system_eid(void) 46 static void smc_ism_create_system_eid(void)
47 { 47 {
48 struct smc_ism_seid *seid = 48 struct smc_ism_seid *seid =
49 (struct smc_ism_seid *)smc_ism 49 (struct smc_ism_seid *)smc_ism_v2_system_eid;
50 #if IS_ENABLED(CONFIG_S390) 50 #if IS_ENABLED(CONFIG_S390)
51 struct cpuid id; 51 struct cpuid id;
52 u16 ident_tail; 52 u16 ident_tail;
53 char tmp[5]; 53 char tmp[5];
54 54
55 memcpy(seid->seid_string, "IBM-SYSZ-IS 55 memcpy(seid->seid_string, "IBM-SYSZ-ISMSEID00000000", 24);
56 get_cpu_id(&id); 56 get_cpu_id(&id);
57 ident_tail = (u16)(id.ident & SMC_ISM_ 57 ident_tail = (u16)(id.ident & SMC_ISM_IDENT_MASK);
58 snprintf(tmp, 5, "%04X", ident_tail); 58 snprintf(tmp, 5, "%04X", ident_tail);
59 memcpy(seid->serial_number, tmp, 4); 59 memcpy(seid->serial_number, tmp, 4);
60 snprintf(tmp, 5, "%04X", id.machine); 60 snprintf(tmp, 5, "%04X", id.machine);
61 memcpy(seid->type, tmp, 4); 61 memcpy(seid->type, tmp, 4);
62 #else 62 #else
63 memset(seid, 0, SMC_MAX_EID_LEN); 63 memset(seid, 0, SMC_MAX_EID_LEN);
64 #endif 64 #endif
65 } 65 }
66 66
67 /* Test if an ISM communication is possible - 67 /* Test if an ISM communication is possible - same CPC */
68 int smc_ism_cantalk(struct smcd_gid *peer_gid, 68 int smc_ism_cantalk(struct smcd_gid *peer_gid, unsigned short vlan_id,
69 struct smcd_dev *smcd) 69 struct smcd_dev *smcd)
70 { 70 {
71 return smcd->ops->query_remote_gid(smc 71 return smcd->ops->query_remote_gid(smcd, peer_gid, vlan_id ? 1 : 0,
72 vla 72 vlan_id);
73 } 73 }
74 74
75 void smc_ism_get_system_eid(u8 **eid) 75 void smc_ism_get_system_eid(u8 **eid)
76 { 76 {
77 if (!smc_ism_v2_capable) 77 if (!smc_ism_v2_capable)
78 *eid = NULL; 78 *eid = NULL;
79 else 79 else
80 *eid = smc_ism_v2_system_eid; 80 *eid = smc_ism_v2_system_eid;
81 } 81 }
82 82
83 u16 smc_ism_get_chid(struct smcd_dev *smcd) 83 u16 smc_ism_get_chid(struct smcd_dev *smcd)
84 { 84 {
85 return smcd->ops->get_chid(smcd); 85 return smcd->ops->get_chid(smcd);
86 } 86 }
87 87
88 /* HW supports ISM V2 and thus System EID is d 88 /* HW supports ISM V2 and thus System EID is defined */
89 bool smc_ism_is_v2_capable(void) 89 bool smc_ism_is_v2_capable(void)
90 { 90 {
91 return smc_ism_v2_capable; 91 return smc_ism_v2_capable;
92 } 92 }
93 93
94 void smc_ism_set_v2_capable(void) <<
95 { <<
96 smc_ism_v2_capable = true; <<
97 } <<
98 <<
99 /* Set a connection using this DMBE. */ 94 /* Set a connection using this DMBE. */
100 void smc_ism_set_conn(struct smc_connection *c 95 void smc_ism_set_conn(struct smc_connection *conn)
101 { 96 {
102 unsigned long flags; 97 unsigned long flags;
103 98
104 spin_lock_irqsave(&conn->lgr->smcd->lo 99 spin_lock_irqsave(&conn->lgr->smcd->lock, flags);
105 conn->lgr->smcd->conn[conn->rmb_desc-> 100 conn->lgr->smcd->conn[conn->rmb_desc->sba_idx] = conn;
106 spin_unlock_irqrestore(&conn->lgr->smc 101 spin_unlock_irqrestore(&conn->lgr->smcd->lock, flags);
107 } 102 }
108 103
109 /* Unset a connection using this DMBE. */ 104 /* Unset a connection using this DMBE. */
110 void smc_ism_unset_conn(struct smc_connection 105 void smc_ism_unset_conn(struct smc_connection *conn)
111 { 106 {
112 unsigned long flags; 107 unsigned long flags;
113 108
114 if (!conn->rmb_desc) 109 if (!conn->rmb_desc)
115 return; 110 return;
116 111
117 spin_lock_irqsave(&conn->lgr->smcd->lo 112 spin_lock_irqsave(&conn->lgr->smcd->lock, flags);
118 conn->lgr->smcd->conn[conn->rmb_desc-> 113 conn->lgr->smcd->conn[conn->rmb_desc->sba_idx] = NULL;
119 spin_unlock_irqrestore(&conn->lgr->smc 114 spin_unlock_irqrestore(&conn->lgr->smcd->lock, flags);
120 } 115 }
121 116
122 /* Register a VLAN identifier with the ISM dev 117 /* Register a VLAN identifier with the ISM device. Use a reference count
123 * and add a VLAN identifier only when the fir 118 * and add a VLAN identifier only when the first DMB using this VLAN is
124 * registered. 119 * registered.
125 */ 120 */
126 int smc_ism_get_vlan(struct smcd_dev *smcd, un 121 int smc_ism_get_vlan(struct smcd_dev *smcd, unsigned short vlanid)
127 { 122 {
128 struct smc_ism_vlanid *new_vlan, *vlan 123 struct smc_ism_vlanid *new_vlan, *vlan;
129 unsigned long flags; 124 unsigned long flags;
130 int rc = 0; 125 int rc = 0;
131 126
132 if (!vlanid) /* No 127 if (!vlanid) /* No valid vlan id */
133 return -EINVAL; 128 return -EINVAL;
134 if (!smcd->ops->add_vlan_id) <<
135 return -EOPNOTSUPP; <<
136 129
137 /* create new vlan entry, in case we n 130 /* create new vlan entry, in case we need it */
138 new_vlan = kzalloc(sizeof(*new_vlan), 131 new_vlan = kzalloc(sizeof(*new_vlan), GFP_KERNEL);
139 if (!new_vlan) 132 if (!new_vlan)
140 return -ENOMEM; 133 return -ENOMEM;
141 new_vlan->vlanid = vlanid; 134 new_vlan->vlanid = vlanid;
142 refcount_set(&new_vlan->refcnt, 1); 135 refcount_set(&new_vlan->refcnt, 1);
143 136
144 /* if there is an existing entry, incr 137 /* if there is an existing entry, increase count and return */
145 spin_lock_irqsave(&smcd->lock, flags); 138 spin_lock_irqsave(&smcd->lock, flags);
146 list_for_each_entry(vlan, &smcd->vlan, 139 list_for_each_entry(vlan, &smcd->vlan, list) {
147 if (vlan->vlanid == vlanid) { 140 if (vlan->vlanid == vlanid) {
148 refcount_inc(&vlan->re 141 refcount_inc(&vlan->refcnt);
149 kfree(new_vlan); 142 kfree(new_vlan);
150 goto out; 143 goto out;
151 } 144 }
152 } 145 }
153 146
154 /* no existing entry found. 147 /* no existing entry found.
155 * add new entry to device; might fail 148 * add new entry to device; might fail, e.g., if HW limit reached
156 */ 149 */
157 if (smcd->ops->add_vlan_id(smcd, vlani 150 if (smcd->ops->add_vlan_id(smcd, vlanid)) {
158 kfree(new_vlan); 151 kfree(new_vlan);
159 rc = -EIO; 152 rc = -EIO;
160 goto out; 153 goto out;
161 } 154 }
162 list_add_tail(&new_vlan->list, &smcd-> 155 list_add_tail(&new_vlan->list, &smcd->vlan);
163 out: 156 out:
164 spin_unlock_irqrestore(&smcd->lock, fl 157 spin_unlock_irqrestore(&smcd->lock, flags);
165 return rc; 158 return rc;
166 } 159 }
167 160
168 /* Unregister a VLAN identifier with the ISM d 161 /* Unregister a VLAN identifier with the ISM device. Use a reference count
169 * and remove a VLAN identifier only when the 162 * and remove a VLAN identifier only when the last DMB using this VLAN is
170 * unregistered. 163 * unregistered.
171 */ 164 */
172 int smc_ism_put_vlan(struct smcd_dev *smcd, un 165 int smc_ism_put_vlan(struct smcd_dev *smcd, unsigned short vlanid)
173 { 166 {
174 struct smc_ism_vlanid *vlan; 167 struct smc_ism_vlanid *vlan;
175 unsigned long flags; 168 unsigned long flags;
176 bool found = false; 169 bool found = false;
177 int rc = 0; 170 int rc = 0;
178 171
179 if (!vlanid) /* No 172 if (!vlanid) /* No valid vlan id */
180 return -EINVAL; 173 return -EINVAL;
181 if (!smcd->ops->del_vlan_id) <<
182 return -EOPNOTSUPP; <<
183 174
184 spin_lock_irqsave(&smcd->lock, flags); 175 spin_lock_irqsave(&smcd->lock, flags);
185 list_for_each_entry(vlan, &smcd->vlan, 176 list_for_each_entry(vlan, &smcd->vlan, list) {
186 if (vlan->vlanid == vlanid) { 177 if (vlan->vlanid == vlanid) {
187 if (!refcount_dec_and_ 178 if (!refcount_dec_and_test(&vlan->refcnt))
188 goto out; 179 goto out;
189 found = true; 180 found = true;
190 break; 181 break;
191 } 182 }
192 } 183 }
193 if (!found) { 184 if (!found) {
194 rc = -ENOENT; 185 rc = -ENOENT;
195 goto out; /* VLA 186 goto out; /* VLAN id not in table */
196 } 187 }
197 188
198 /* Found and the last reference just g 189 /* Found and the last reference just gone */
199 if (smcd->ops->del_vlan_id(smcd, vlani 190 if (smcd->ops->del_vlan_id(smcd, vlanid))
200 rc = -EIO; 191 rc = -EIO;
201 list_del(&vlan->list); 192 list_del(&vlan->list);
202 kfree(vlan); 193 kfree(vlan);
203 out: 194 out:
204 spin_unlock_irqrestore(&smcd->lock, fl 195 spin_unlock_irqrestore(&smcd->lock, flags);
205 return rc; 196 return rc;
206 } 197 }
207 198
208 int smc_ism_unregister_dmb(struct smcd_dev *sm 199 int smc_ism_unregister_dmb(struct smcd_dev *smcd, struct smc_buf_desc *dmb_desc)
209 { 200 {
210 struct smcd_dmb dmb; 201 struct smcd_dmb dmb;
211 int rc = 0; 202 int rc = 0;
212 203
213 if (!dmb_desc->dma_addr) 204 if (!dmb_desc->dma_addr)
214 return rc; 205 return rc;
215 206
216 memset(&dmb, 0, sizeof(dmb)); 207 memset(&dmb, 0, sizeof(dmb));
217 dmb.dmb_tok = dmb_desc->token; 208 dmb.dmb_tok = dmb_desc->token;
218 dmb.sba_idx = dmb_desc->sba_idx; 209 dmb.sba_idx = dmb_desc->sba_idx;
219 dmb.cpu_addr = dmb_desc->cpu_addr; 210 dmb.cpu_addr = dmb_desc->cpu_addr;
220 dmb.dma_addr = dmb_desc->dma_addr; 211 dmb.dma_addr = dmb_desc->dma_addr;
221 dmb.dmb_len = dmb_desc->len; 212 dmb.dmb_len = dmb_desc->len;
222 rc = smcd->ops->unregister_dmb(smcd, & 213 rc = smcd->ops->unregister_dmb(smcd, &dmb);
223 if (!rc || rc == ISM_ERROR) { 214 if (!rc || rc == ISM_ERROR) {
224 dmb_desc->cpu_addr = NULL; 215 dmb_desc->cpu_addr = NULL;
225 dmb_desc->dma_addr = 0; 216 dmb_desc->dma_addr = 0;
226 } 217 }
227 218
228 return rc; 219 return rc;
229 } 220 }
230 221
231 int smc_ism_register_dmb(struct smc_link_group 222 int smc_ism_register_dmb(struct smc_link_group *lgr, int dmb_len,
232 struct smc_buf_desc * 223 struct smc_buf_desc *dmb_desc)
233 { 224 {
>> 225 #if IS_ENABLED(CONFIG_ISM)
234 struct smcd_dmb dmb; 226 struct smcd_dmb dmb;
235 int rc; 227 int rc;
236 228
237 memset(&dmb, 0, sizeof(dmb)); 229 memset(&dmb, 0, sizeof(dmb));
238 dmb.dmb_len = dmb_len; 230 dmb.dmb_len = dmb_len;
239 dmb.sba_idx = dmb_desc->sba_idx; 231 dmb.sba_idx = dmb_desc->sba_idx;
240 dmb.vlan_id = lgr->vlan_id; 232 dmb.vlan_id = lgr->vlan_id;
241 dmb.rgid = lgr->peer_gid.gid; 233 dmb.rgid = lgr->peer_gid.gid;
242 rc = lgr->smcd->ops->register_dmb(lgr- !! 234 rc = lgr->smcd->ops->register_dmb(lgr->smcd, &dmb, &smc_ism_client);
243 if (!rc) { 235 if (!rc) {
244 dmb_desc->sba_idx = dmb.sba_id 236 dmb_desc->sba_idx = dmb.sba_idx;
245 dmb_desc->token = dmb.dmb_tok; 237 dmb_desc->token = dmb.dmb_tok;
246 dmb_desc->cpu_addr = dmb.cpu_a 238 dmb_desc->cpu_addr = dmb.cpu_addr;
247 dmb_desc->dma_addr = dmb.dma_a 239 dmb_desc->dma_addr = dmb.dma_addr;
248 dmb_desc->len = dmb.dmb_len; 240 dmb_desc->len = dmb.dmb_len;
249 } 241 }
250 return rc; 242 return rc;
251 } !! 243 #else
252 !! 244 return 0;
253 bool smc_ism_support_dmb_nocopy(struct smcd_de !! 245 #endif
254 { <<
255 /* for now only loopback-ism supports <<
256 * merging sndbuf with peer DMB to avo <<
257 * data copies between them. <<
258 */ <<
259 return (smcd->ops->support_dmb_nocopy <<
260 smcd->ops->support_dmb_nocopy( <<
261 } <<
262 <<
263 int smc_ism_attach_dmb(struct smcd_dev *dev, u <<
264 struct smc_buf_desc *dm <<
265 { <<
266 struct smcd_dmb dmb; <<
267 int rc = 0; <<
268 <<
269 if (!dev->ops->attach_dmb) <<
270 return -EINVAL; <<
271 <<
272 memset(&dmb, 0, sizeof(dmb)); <<
273 dmb.dmb_tok = token; <<
274 rc = dev->ops->attach_dmb(dev, &dmb); <<
275 if (!rc) { <<
276 dmb_desc->sba_idx = dmb.sba_id <<
277 dmb_desc->token = dmb.dmb_tok; <<
278 dmb_desc->cpu_addr = dmb.cpu_a <<
279 dmb_desc->dma_addr = dmb.dma_a <<
280 dmb_desc->len = dmb.dmb_len; <<
281 } <<
282 return rc; <<
283 } <<
284 <<
285 int smc_ism_detach_dmb(struct smcd_dev *dev, u <<
286 { <<
287 if (!dev->ops->detach_dmb) <<
288 return -EINVAL; <<
289 <<
290 return dev->ops->detach_dmb(dev, token <<
291 } 246 }
292 247
293 static int smc_nl_handle_smcd_dev(struct smcd_ 248 static int smc_nl_handle_smcd_dev(struct smcd_dev *smcd,
294 struct sk_bu 249 struct sk_buff *skb,
295 struct netli 250 struct netlink_callback *cb)
296 { 251 {
297 char smc_pnet[SMC_MAX_PNETID_LEN + 1]; 252 char smc_pnet[SMC_MAX_PNETID_LEN + 1];
298 struct smc_pci_dev smc_pci_dev; 253 struct smc_pci_dev smc_pci_dev;
299 struct nlattr *port_attrs; 254 struct nlattr *port_attrs;
300 struct nlattr *attrs; 255 struct nlattr *attrs;
301 struct ism_dev *ism; 256 struct ism_dev *ism;
302 int use_cnt = 0; 257 int use_cnt = 0;
303 void *nlh; 258 void *nlh;
304 259
305 ism = smcd->priv; 260 ism = smcd->priv;
306 nlh = genlmsg_put(skb, NETLINK_CB(cb-> 261 nlh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
307 &smc_gen_nl_family, 262 &smc_gen_nl_family, NLM_F_MULTI,
308 SMC_NETLINK_GET_DEV_ 263 SMC_NETLINK_GET_DEV_SMCD);
309 if (!nlh) 264 if (!nlh)
310 goto errmsg; 265 goto errmsg;
311 attrs = nla_nest_start(skb, SMC_GEN_DE 266 attrs = nla_nest_start(skb, SMC_GEN_DEV_SMCD);
312 if (!attrs) 267 if (!attrs)
313 goto errout; 268 goto errout;
314 use_cnt = atomic_read(&smcd->lgr_cnt); 269 use_cnt = atomic_read(&smcd->lgr_cnt);
315 if (nla_put_u32(skb, SMC_NLA_DEV_USE_C 270 if (nla_put_u32(skb, SMC_NLA_DEV_USE_CNT, use_cnt))
316 goto errattr; 271 goto errattr;
317 if (nla_put_u8(skb, SMC_NLA_DEV_IS_CRI 272 if (nla_put_u8(skb, SMC_NLA_DEV_IS_CRIT, use_cnt > 0))
318 goto errattr; 273 goto errattr;
319 memset(&smc_pci_dev, 0, sizeof(smc_pci 274 memset(&smc_pci_dev, 0, sizeof(smc_pci_dev));
320 smc_set_pci_values(to_pci_dev(ism->dev 275 smc_set_pci_values(to_pci_dev(ism->dev.parent), &smc_pci_dev);
321 if (nla_put_u32(skb, SMC_NLA_DEV_PCI_F 276 if (nla_put_u32(skb, SMC_NLA_DEV_PCI_FID, smc_pci_dev.pci_fid))
322 goto errattr; 277 goto errattr;
323 if (nla_put_u16(skb, SMC_NLA_DEV_PCI_C 278 if (nla_put_u16(skb, SMC_NLA_DEV_PCI_CHID, smc_pci_dev.pci_pchid))
324 goto errattr; 279 goto errattr;
325 if (nla_put_u16(skb, SMC_NLA_DEV_PCI_V 280 if (nla_put_u16(skb, SMC_NLA_DEV_PCI_VENDOR, smc_pci_dev.pci_vendor))
326 goto errattr; 281 goto errattr;
327 if (nla_put_u16(skb, SMC_NLA_DEV_PCI_D 282 if (nla_put_u16(skb, SMC_NLA_DEV_PCI_DEVICE, smc_pci_dev.pci_device))
328 goto errattr; 283 goto errattr;
329 if (nla_put_string(skb, SMC_NLA_DEV_PC 284 if (nla_put_string(skb, SMC_NLA_DEV_PCI_ID, smc_pci_dev.pci_id))
330 goto errattr; 285 goto errattr;
331 286
332 port_attrs = nla_nest_start(skb, SMC_N 287 port_attrs = nla_nest_start(skb, SMC_NLA_DEV_PORT);
333 if (!port_attrs) 288 if (!port_attrs)
334 goto errattr; 289 goto errattr;
335 if (nla_put_u8(skb, SMC_NLA_DEV_PORT_P 290 if (nla_put_u8(skb, SMC_NLA_DEV_PORT_PNET_USR, smcd->pnetid_by_user))
336 goto errportattr; 291 goto errportattr;
337 memcpy(smc_pnet, smcd->pnetid, SMC_MAX 292 memcpy(smc_pnet, smcd->pnetid, SMC_MAX_PNETID_LEN);
338 smc_pnet[SMC_MAX_PNETID_LEN] = 0; 293 smc_pnet[SMC_MAX_PNETID_LEN] = 0;
339 if (nla_put_string(skb, SMC_NLA_DEV_PO 294 if (nla_put_string(skb, SMC_NLA_DEV_PORT_PNETID, smc_pnet))
340 goto errportattr; 295 goto errportattr;
341 296
342 nla_nest_end(skb, port_attrs); 297 nla_nest_end(skb, port_attrs);
343 nla_nest_end(skb, attrs); 298 nla_nest_end(skb, attrs);
344 genlmsg_end(skb, nlh); 299 genlmsg_end(skb, nlh);
345 return 0; 300 return 0;
346 301
347 errportattr: 302 errportattr:
348 nla_nest_cancel(skb, port_attrs); 303 nla_nest_cancel(skb, port_attrs);
349 errattr: 304 errattr:
350 nla_nest_cancel(skb, attrs); 305 nla_nest_cancel(skb, attrs);
351 errout: 306 errout:
352 nlmsg_cancel(skb, nlh); 307 nlmsg_cancel(skb, nlh);
353 errmsg: 308 errmsg:
354 return -EMSGSIZE; 309 return -EMSGSIZE;
355 } 310 }
356 311
357 static void smc_nl_prep_smcd_dev(struct smcd_d 312 static void smc_nl_prep_smcd_dev(struct smcd_dev_list *dev_list,
358 struct sk_buf 313 struct sk_buff *skb,
359 struct netlin 314 struct netlink_callback *cb)
360 { 315 {
361 struct smc_nl_dmp_ctx *cb_ctx = smc_nl 316 struct smc_nl_dmp_ctx *cb_ctx = smc_nl_dmp_ctx(cb);
362 int snum = cb_ctx->pos[0]; 317 int snum = cb_ctx->pos[0];
363 struct smcd_dev *smcd; 318 struct smcd_dev *smcd;
364 int num = 0; 319 int num = 0;
365 320
366 mutex_lock(&dev_list->mutex); 321 mutex_lock(&dev_list->mutex);
367 list_for_each_entry(smcd, &dev_list->l 322 list_for_each_entry(smcd, &dev_list->list, list) {
368 if (num < snum) 323 if (num < snum)
369 goto next; 324 goto next;
370 if (smc_ism_is_loopback(smcd)) <<
371 goto next; <<
372 if (smc_nl_handle_smcd_dev(smc 325 if (smc_nl_handle_smcd_dev(smcd, skb, cb))
373 goto errout; 326 goto errout;
374 next: 327 next:
375 num++; 328 num++;
376 } 329 }
377 errout: 330 errout:
378 mutex_unlock(&dev_list->mutex); 331 mutex_unlock(&dev_list->mutex);
379 cb_ctx->pos[0] = num; 332 cb_ctx->pos[0] = num;
380 } 333 }
381 334
382 int smcd_nl_get_device(struct sk_buff *skb, st 335 int smcd_nl_get_device(struct sk_buff *skb, struct netlink_callback *cb)
383 { 336 {
384 smc_nl_prep_smcd_dev(&smcd_dev_list, s 337 smc_nl_prep_smcd_dev(&smcd_dev_list, skb, cb);
385 return skb->len; 338 return skb->len;
386 } 339 }
387 340
388 #if IS_ENABLED(CONFIG_ISM) 341 #if IS_ENABLED(CONFIG_ISM)
389 struct smc_ism_event_work { 342 struct smc_ism_event_work {
390 struct work_struct work; 343 struct work_struct work;
391 struct smcd_dev *smcd; 344 struct smcd_dev *smcd;
392 struct ism_event event; 345 struct ism_event event;
393 }; 346 };
394 347
395 #define ISM_EVENT_REQUEST 0x0001 348 #define ISM_EVENT_REQUEST 0x0001
396 #define ISM_EVENT_RESPONSE 0x0002 349 #define ISM_EVENT_RESPONSE 0x0002
397 #define ISM_EVENT_REQUEST_IR 0x0000 350 #define ISM_EVENT_REQUEST_IR 0x00000001
398 #define ISM_EVENT_CODE_SHUTDOWN 0x80 351 #define ISM_EVENT_CODE_SHUTDOWN 0x80
399 #define ISM_EVENT_CODE_TESTLINK 0x83 352 #define ISM_EVENT_CODE_TESTLINK 0x83
400 353
401 union smcd_sw_event_info { 354 union smcd_sw_event_info {
402 u64 info; 355 u64 info;
403 struct { 356 struct {
404 u8 uid[SMC_LGR_ID 357 u8 uid[SMC_LGR_ID_SIZE];
405 unsigned short vlan_id; 358 unsigned short vlan_id;
406 u16 code; 359 u16 code;
407 }; 360 };
408 }; 361 };
409 362
410 static void smcd_handle_sw_event(struct smc_is 363 static void smcd_handle_sw_event(struct smc_ism_event_work *wrk)
411 { 364 {
412 struct smcd_gid peer_gid = { .gid = wr 365 struct smcd_gid peer_gid = { .gid = wrk->event.tok,
413 .gid_ext 366 .gid_ext = 0 };
414 union smcd_sw_event_info ev_info; 367 union smcd_sw_event_info ev_info;
415 368
416 ev_info.info = wrk->event.info; 369 ev_info.info = wrk->event.info;
417 switch (wrk->event.code) { 370 switch (wrk->event.code) {
418 case ISM_EVENT_CODE_SHUTDOWN: /* Pee 371 case ISM_EVENT_CODE_SHUTDOWN: /* Peer shut down DMBs */
419 smc_smcd_terminate(wrk->smcd, 372 smc_smcd_terminate(wrk->smcd, &peer_gid, ev_info.vlan_id);
420 break; 373 break;
421 case ISM_EVENT_CODE_TESTLINK: /* Act 374 case ISM_EVENT_CODE_TESTLINK: /* Activity timer */
422 if (ev_info.code == ISM_EVENT_ !! 375 if (ev_info.code == ISM_EVENT_REQUEST) {
423 wrk->smcd->ops->signal_eve <<
424 ev_info.code = ISM_EVE 376 ev_info.code = ISM_EVENT_RESPONSE;
425 wrk->smcd->ops->signal 377 wrk->smcd->ops->signal_event(wrk->smcd,
426 378 &peer_gid,
427 379 ISM_EVENT_REQUEST_IR,
428 380 ISM_EVENT_CODE_TESTLINK,
429 381 ev_info.info);
430 } 382 }
431 break; 383 break;
432 } 384 }
433 } 385 }
434 386
435 /* worker for SMC-D events */ 387 /* worker for SMC-D events */
436 static void smc_ism_event_work(struct work_str 388 static void smc_ism_event_work(struct work_struct *work)
437 { 389 {
438 struct smc_ism_event_work *wrk = 390 struct smc_ism_event_work *wrk =
439 container_of(work, struct smc_ 391 container_of(work, struct smc_ism_event_work, work);
440 struct smcd_gid smcd_gid = { .gid = wr 392 struct smcd_gid smcd_gid = { .gid = wrk->event.tok,
441 .gid_ext 393 .gid_ext = 0 };
442 394
443 switch (wrk->event.type) { 395 switch (wrk->event.type) {
444 case ISM_EVENT_GID: /* GID event, 396 case ISM_EVENT_GID: /* GID event, token is peer GID */
445 smc_smcd_terminate(wrk->smcd, 397 smc_smcd_terminate(wrk->smcd, &smcd_gid, VLAN_VID_MASK);
446 break; 398 break;
447 case ISM_EVENT_DMB: 399 case ISM_EVENT_DMB:
448 break; 400 break;
449 case ISM_EVENT_SWR: /* Software de 401 case ISM_EVENT_SWR: /* Software defined event */
450 smcd_handle_sw_event(wrk); 402 smcd_handle_sw_event(wrk);
451 break; 403 break;
452 } 404 }
453 kfree(wrk); 405 kfree(wrk);
454 } 406 }
455 407
456 static struct smcd_dev *smcd_alloc_dev(struct 408 static struct smcd_dev *smcd_alloc_dev(struct device *parent, const char *name,
457 const s 409 const struct smcd_ops *ops, int max_dmbs)
458 { 410 {
459 struct smcd_dev *smcd; 411 struct smcd_dev *smcd;
460 412
461 smcd = devm_kzalloc(parent, sizeof(*sm 413 smcd = devm_kzalloc(parent, sizeof(*smcd), GFP_KERNEL);
462 if (!smcd) 414 if (!smcd)
463 return NULL; 415 return NULL;
464 smcd->conn = devm_kcalloc(parent, max_ 416 smcd->conn = devm_kcalloc(parent, max_dmbs,
465 sizeof(struc 417 sizeof(struct smc_connection *), GFP_KERNEL);
466 if (!smcd->conn) 418 if (!smcd->conn)
467 return NULL; 419 return NULL;
468 420
469 smcd->event_wq = alloc_ordered_workque 421 smcd->event_wq = alloc_ordered_workqueue("ism_evt_wq-%s)",
470 422 WQ_MEM_RECLAIM, name);
471 if (!smcd->event_wq) 423 if (!smcd->event_wq)
472 return NULL; 424 return NULL;
473 425
474 smcd->ops = ops; 426 smcd->ops = ops;
475 427
476 spin_lock_init(&smcd->lock); 428 spin_lock_init(&smcd->lock);
477 spin_lock_init(&smcd->lgr_lock); 429 spin_lock_init(&smcd->lgr_lock);
478 INIT_LIST_HEAD(&smcd->vlan); 430 INIT_LIST_HEAD(&smcd->vlan);
479 INIT_LIST_HEAD(&smcd->lgr_list); 431 INIT_LIST_HEAD(&smcd->lgr_list);
480 init_waitqueue_head(&smcd->lgrs_delete 432 init_waitqueue_head(&smcd->lgrs_deleted);
481 return smcd; 433 return smcd;
482 } 434 }
483 435
484 static void smcd_register_dev(struct ism_dev * 436 static void smcd_register_dev(struct ism_dev *ism)
485 { 437 {
486 const struct smcd_ops *ops = ism_get_s 438 const struct smcd_ops *ops = ism_get_smcd_ops();
487 struct smcd_dev *smcd, *fentry; !! 439 struct smcd_dev *smcd;
488 440
489 if (!ops) 441 if (!ops)
490 return; 442 return;
491 443
492 smcd = smcd_alloc_dev(&ism->pdev->dev, 444 smcd = smcd_alloc_dev(&ism->pdev->dev, dev_name(&ism->pdev->dev), ops,
493 ISM_NR_DMBS); 445 ISM_NR_DMBS);
494 if (!smcd) 446 if (!smcd)
495 return; 447 return;
496 smcd->priv = ism; 448 smcd->priv = ism;
497 smcd->client = &smc_ism_client; <<
498 ism_set_priv(ism, &smc_ism_client, smc 449 ism_set_priv(ism, &smc_ism_client, smcd);
499 if (smc_pnetid_by_dev_port(&ism->pdev- 450 if (smc_pnetid_by_dev_port(&ism->pdev->dev, 0, smcd->pnetid))
500 smc_pnetid_by_table_smcd(smcd) 451 smc_pnetid_by_table_smcd(smcd);
501 452
502 if (smcd->ops->supports_v2()) <<
503 smc_ism_set_v2_capable(); <<
504 mutex_lock(&smcd_dev_list.mutex); 453 mutex_lock(&smcd_dev_list.mutex);
505 /* sort list: !! 454 if (list_empty(&smcd_dev_list.list)) {
506 * - devices without pnetid before dev !! 455 if (smcd->ops->supports_v2())
507 * - loopback-ism always at the very b !! 456 smc_ism_v2_capable = true;
508 */ <<
509 if (!smcd->pnetid[0]) { <<
510 fentry = list_first_entry_or_n <<
511 <<
512 if (fentry && smc_ism_is_loopb <<
513 list_add(&smcd->list, <<
514 else <<
515 list_add(&smcd->list, <<
516 } else { <<
517 list_add_tail(&smcd->list, &sm <<
518 } 457 }
>> 458 /* sort list: devices without pnetid before devices with pnetid */
>> 459 if (smcd->pnetid[0])
>> 460 list_add_tail(&smcd->list, &smcd_dev_list.list);
>> 461 else
>> 462 list_add(&smcd->list, &smcd_dev_list.list);
519 mutex_unlock(&smcd_dev_list.mutex); 463 mutex_unlock(&smcd_dev_list.mutex);
520 464
521 pr_warn_ratelimited("smc: adding smcd 465 pr_warn_ratelimited("smc: adding smcd device %s with pnetid %.16s%s\n",
522 dev_name(&ism->dev 466 dev_name(&ism->dev), smcd->pnetid,
523 smcd->pnetid_by_us 467 smcd->pnetid_by_user ? " (user defined)" : "");
524 468
525 return; 469 return;
526 } 470 }
527 471
528 static void smcd_unregister_dev(struct ism_dev 472 static void smcd_unregister_dev(struct ism_dev *ism)
529 { 473 {
530 struct smcd_dev *smcd = ism_get_priv(i 474 struct smcd_dev *smcd = ism_get_priv(ism, &smc_ism_client);
531 475
532 pr_warn_ratelimited("smc: removing smc 476 pr_warn_ratelimited("smc: removing smcd device %s\n",
533 dev_name(&ism->dev 477 dev_name(&ism->dev));
534 smcd->going_away = 1; 478 smcd->going_away = 1;
535 smc_smcd_terminate_all(smcd); 479 smc_smcd_terminate_all(smcd);
536 mutex_lock(&smcd_dev_list.mutex); 480 mutex_lock(&smcd_dev_list.mutex);
537 list_del_init(&smcd->list); 481 list_del_init(&smcd->list);
538 mutex_unlock(&smcd_dev_list.mutex); 482 mutex_unlock(&smcd_dev_list.mutex);
539 destroy_workqueue(smcd->event_wq); 483 destroy_workqueue(smcd->event_wq);
540 } 484 }
541 485
542 /* SMCD Device event handler. Called from ISM 486 /* SMCD Device event handler. Called from ISM device interrupt handler.
543 * Parameters are ism device pointer, 487 * Parameters are ism device pointer,
544 * - event->type (0 --> DMB, 1 --> GID), 488 * - event->type (0 --> DMB, 1 --> GID),
545 * - event->code (event code), 489 * - event->code (event code),
546 * - event->tok (either DMB token when event t 490 * - event->tok (either DMB token when event type 0, or GID when event type 1)
547 * - event->time (time of day) 491 * - event->time (time of day)
548 * - event->info (debug info). 492 * - event->info (debug info).
549 * 493 *
550 * Context: 494 * Context:
551 * - Function called in IRQ context from ISM d 495 * - Function called in IRQ context from ISM device driver event handler.
552 */ 496 */
553 static void smcd_handle_event(struct ism_dev * 497 static void smcd_handle_event(struct ism_dev *ism, struct ism_event *event)
554 { 498 {
555 struct smcd_dev *smcd = ism_get_priv(i 499 struct smcd_dev *smcd = ism_get_priv(ism, &smc_ism_client);
556 struct smc_ism_event_work *wrk; 500 struct smc_ism_event_work *wrk;
557 501
558 if (smcd->going_away) 502 if (smcd->going_away)
559 return; 503 return;
560 /* copy event to event work queue, and 504 /* copy event to event work queue, and let it be handled there */
561 wrk = kmalloc(sizeof(*wrk), GFP_ATOMIC 505 wrk = kmalloc(sizeof(*wrk), GFP_ATOMIC);
562 if (!wrk) 506 if (!wrk)
563 return; 507 return;
564 INIT_WORK(&wrk->work, smc_ism_event_wo 508 INIT_WORK(&wrk->work, smc_ism_event_work);
565 wrk->smcd = smcd; 509 wrk->smcd = smcd;
566 wrk->event = *event; 510 wrk->event = *event;
567 queue_work(smcd->event_wq, &wrk->work) 511 queue_work(smcd->event_wq, &wrk->work);
568 } 512 }
569 513
570 /* SMCD Device interrupt handler. Called from 514 /* SMCD Device interrupt handler. Called from ISM device interrupt handler.
571 * Parameters are the ism device pointer, DMB 515 * Parameters are the ism device pointer, DMB number, and the DMBE bitmask.
572 * Find the connection and schedule the taskle 516 * Find the connection and schedule the tasklet for this connection.
573 * 517 *
574 * Context: 518 * Context:
575 * - Function called in IRQ context from ISM d 519 * - Function called in IRQ context from ISM device driver IRQ handler.
576 */ 520 */
577 static void smcd_handle_irq(struct ism_dev *is 521 static void smcd_handle_irq(struct ism_dev *ism, unsigned int dmbno,
578 u16 dmbemask) 522 u16 dmbemask)
579 { 523 {
580 struct smcd_dev *smcd = ism_get_priv(i 524 struct smcd_dev *smcd = ism_get_priv(ism, &smc_ism_client);
581 struct smc_connection *conn = NULL; 525 struct smc_connection *conn = NULL;
582 unsigned long flags; 526 unsigned long flags;
583 527
584 spin_lock_irqsave(&smcd->lock, flags); 528 spin_lock_irqsave(&smcd->lock, flags);
585 conn = smcd->conn[dmbno]; 529 conn = smcd->conn[dmbno];
586 if (conn && !conn->killed) 530 if (conn && !conn->killed)
587 tasklet_schedule(&conn->rx_tsk 531 tasklet_schedule(&conn->rx_tsklet);
588 spin_unlock_irqrestore(&smcd->lock, fl 532 spin_unlock_irqrestore(&smcd->lock, flags);
589 } 533 }
590 #endif 534 #endif
591 535
592 int smc_ism_signal_shutdown(struct smc_link_gr 536 int smc_ism_signal_shutdown(struct smc_link_group *lgr)
593 { 537 {
594 int rc = 0; 538 int rc = 0;
595 #if IS_ENABLED(CONFIG_ISM) 539 #if IS_ENABLED(CONFIG_ISM)
596 union smcd_sw_event_info ev_info; 540 union smcd_sw_event_info ev_info;
597 541
598 if (lgr->peer_shutdown) 542 if (lgr->peer_shutdown)
599 return 0; <<
600 if (!lgr->smcd->ops->signal_event) <<
601 return 0; 543 return 0;
602 544
603 memcpy(ev_info.uid, lgr->id, SMC_LGR_I 545 memcpy(ev_info.uid, lgr->id, SMC_LGR_ID_SIZE);
604 ev_info.vlan_id = lgr->vlan_id; 546 ev_info.vlan_id = lgr->vlan_id;
605 ev_info.code = ISM_EVENT_REQUEST; 547 ev_info.code = ISM_EVENT_REQUEST;
606 rc = lgr->smcd->ops->signal_event(lgr- 548 rc = lgr->smcd->ops->signal_event(lgr->smcd, &lgr->peer_gid,
607 ISM_ 549 ISM_EVENT_REQUEST_IR,
608 ISM_ 550 ISM_EVENT_CODE_SHUTDOWN,
609 ev_i 551 ev_info.info);
610 #endif 552 #endif
611 return rc; 553 return rc;
612 } 554 }
613 555
614 int smc_ism_init(void) 556 int smc_ism_init(void)
615 { 557 {
616 int rc = 0; 558 int rc = 0;
617 559
618 smc_ism_v2_capable = false; 560 smc_ism_v2_capable = false;
619 smc_ism_create_system_eid(); 561 smc_ism_create_system_eid();
620 562
621 #if IS_ENABLED(CONFIG_ISM) 563 #if IS_ENABLED(CONFIG_ISM)
622 rc = ism_register_client(&smc_ism_clie 564 rc = ism_register_client(&smc_ism_client);
623 #endif 565 #endif
624 return rc; 566 return rc;
625 } 567 }
626 568
627 void smc_ism_exit(void) 569 void smc_ism_exit(void)
628 { 570 {
629 #if IS_ENABLED(CONFIG_ISM) 571 #if IS_ENABLED(CONFIG_ISM)
630 ism_unregister_client(&smc_ism_client) 572 ism_unregister_client(&smc_ism_client);
631 #endif 573 #endif
632 } 574 }
633 575
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