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2023-12-11 072de836f53be56a70cecf70b43ae43b7ce17376 
 kernel/drivers/infiniband/sw/rxe/rxe.c
....@@ -1,36 +1,10 @@
1
+// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
12 /*
23  * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
34  * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
4
- *
5
- * This software is available to you under a choice of one of two
6
- * licenses.  You may choose to be licensed under the terms of the GNU
7
- * General Public License (GPL) Version 2, available from the file
8
- * COPYING in the main directory of this source tree, or the
9
- * OpenIB.org BSD license below:
10
- *
11
- *     Redistribution and use in source and binary forms, with or
12
- *     without modification, are permitted provided that the following
13
- *     conditions are met:
14
- *
15
- *	- Redistributions of source code must retain the above
16
- *	  copyright notice, this list of conditions and the following
17
- *	  disclaimer.
18
- *
19
- *	- Redistributions in binary form must reproduce the above
20
- *	  copyright notice, this list of conditions and the following
21
- *	  disclaimer in the documentation and/or other materials
22
- *	  provided with the distribution.
23
- *
24
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28
- * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29
- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31
- * SOFTWARE.
325  */
336 
7
+#include <rdma/rdma_netlink.h>
348 #include <net/addrconf.h>
359 #include "rxe.h"
3610 #include "rxe_loc.h"
....@@ -39,19 +13,15 @@
3913 MODULE_DESCRIPTION("Soft RDMA transport");
4014 MODULE_LICENSE("Dual BSD/GPL");
4115 
42
-/* free resources for all ports on a device */
43
-static void rxe_cleanup_ports(struct rxe_dev *rxe)
44
-{
45
-	kfree(rxe->port.pkey_tbl);
46
-	rxe->port.pkey_tbl = NULL;
47
-
48
-}
16
+bool rxe_initialized;
4917 
5018 /* free resources for a rxe device all objects created for this device must
5119  * have been destroyed
5220  */
53
-static void rxe_cleanup(struct rxe_dev *rxe)
21
+void rxe_dealloc(struct ib_device *ib_dev)
5422 {
23
+	struct rxe_dev *rxe = container_of(ib_dev, struct rxe_dev, ib_dev);
24
+
5525 	rxe_pool_cleanup(&rxe->uc_pool);
5626 	rxe_pool_cleanup(&rxe->pd_pool);
5727 	rxe_pool_cleanup(&rxe->ah_pool);
....@@ -63,18 +33,8 @@
6333 	rxe_pool_cleanup(&rxe->mc_grp_pool);
6434 	rxe_pool_cleanup(&rxe->mc_elem_pool);
6535 
66
-	rxe_cleanup_ports(rxe);
67
-
68
-	crypto_free_shash(rxe->tfm);
69
-}
70
-
71
-/* called when all references have been dropped */
72
-void rxe_release(struct kref *kref)
73
-{
74
-	struct rxe_dev *rxe = container_of(kref, struct rxe_dev, ref_cnt);
75
-
76
-	rxe_cleanup(rxe);
77
-	ib_dealloc_device(&rxe->ib_dev);
36
+	if (rxe->tfm)
37
+		crypto_free_shash(rxe->tfm);
7838 }
7939 
8040 /* initialize rxe device parameters */
....@@ -82,12 +42,9 @@
8242 {
8343 	rxe->max_inline_data			= RXE_MAX_INLINE_DATA;
8444 
85
-	rxe->attr.fw_ver			= RXE_FW_VER;
45
+	rxe->attr.vendor_id			= RXE_VENDOR_ID;
8646 	rxe->attr.max_mr_size			= RXE_MAX_MR_SIZE;
8747 	rxe->attr.page_size_cap			= RXE_PAGE_SIZE_CAP;
88
-	rxe->attr.vendor_id			= RXE_VENDOR_ID;
89
-	rxe->attr.vendor_part_id		= RXE_VENDOR_PART_ID;
90
-	rxe->attr.hw_ver			= RXE_HW_VER;
9148 	rxe->attr.max_qp			= RXE_MAX_QP;
9249 	rxe->attr.max_qp_wr			= RXE_MAX_QP_WR;
9350 	rxe->attr.device_cap_flags		= RXE_DEVICE_CAP_FLAGS;
....@@ -99,22 +56,13 @@
9956 	rxe->attr.max_mr			= RXE_MAX_MR;
10057 	rxe->attr.max_pd			= RXE_MAX_PD;
10158 	rxe->attr.max_qp_rd_atom		= RXE_MAX_QP_RD_ATOM;
102
-	rxe->attr.max_ee_rd_atom		= RXE_MAX_EE_RD_ATOM;
10359 	rxe->attr.max_res_rd_atom		= RXE_MAX_RES_RD_ATOM;
10460 	rxe->attr.max_qp_init_rd_atom		= RXE_MAX_QP_INIT_RD_ATOM;
105
-	rxe->attr.max_ee_init_rd_atom		= RXE_MAX_EE_INIT_RD_ATOM;
106
-	rxe->attr.atomic_cap			= RXE_ATOMIC_CAP;
107
-	rxe->attr.max_ee			= RXE_MAX_EE;
108
-	rxe->attr.max_rdd			= RXE_MAX_RDD;
109
-	rxe->attr.max_mw			= RXE_MAX_MW;
110
-	rxe->attr.max_raw_ipv6_qp		= RXE_MAX_RAW_IPV6_QP;
111
-	rxe->attr.max_raw_ethy_qp		= RXE_MAX_RAW_ETHY_QP;
61
+	rxe->attr.atomic_cap			= IB_ATOMIC_HCA;
11262 	rxe->attr.max_mcast_grp			= RXE_MAX_MCAST_GRP;
11363 	rxe->attr.max_mcast_qp_attach		= RXE_MAX_MCAST_QP_ATTACH;
11464 	rxe->attr.max_total_mcast_qp_attach	= RXE_MAX_TOT_MCAST_QP_ATTACH;
11565 	rxe->attr.max_ah			= RXE_MAX_AH;
116
-	rxe->attr.max_fmr			= RXE_MAX_FMR;
117
-	rxe->attr.max_map_per_fmr		= RXE_MAX_MAP_PER_FMR;
11866 	rxe->attr.max_srq			= RXE_MAX_SRQ;
11967 	rxe->attr.max_srq_wr			= RXE_MAX_SRQ_WR;
12068 	rxe->attr.max_srq_sge			= RXE_MAX_SRQ_SGE;
....@@ -128,11 +76,11 @@
12876 }
12977 
13078 /* initialize port attributes */
131
-static int rxe_init_port_param(struct rxe_port *port)
79
+static void rxe_init_port_param(struct rxe_port *port)
13280 {
133
-	port->attr.state		= RXE_PORT_STATE;
134
-	port->attr.max_mtu		= RXE_PORT_MAX_MTU;
135
-	port->attr.active_mtu		= RXE_PORT_ACTIVE_MTU;
81
+	port->attr.state		= IB_PORT_DOWN;
82
+	port->attr.max_mtu		= IB_MTU_4096;
83
+	port->attr.active_mtu		= IB_MTU_256;
13684 	port->attr.gid_tbl_len		= RXE_PORT_GID_TBL_LEN;
13785 	port->attr.port_cap_flags	= RXE_PORT_PORT_CAP_FLAGS;
13886 	port->attr.max_msg_sz		= RXE_PORT_MAX_MSG_SZ;
....@@ -149,35 +97,21 @@
14997 	port->attr.active_width		= RXE_PORT_ACTIVE_WIDTH;
15098 	port->attr.active_speed		= RXE_PORT_ACTIVE_SPEED;
15199 	port->attr.phys_state		= RXE_PORT_PHYS_STATE;
152
-	port->mtu_cap			=
153
-				ib_mtu_enum_to_int(RXE_PORT_ACTIVE_MTU);
100
+	port->mtu_cap			= ib_mtu_enum_to_int(IB_MTU_256);
154101 	port->subnet_prefix		= cpu_to_be64(RXE_PORT_SUBNET_PREFIX);
155
-
156
-	return 0;
157102 }
158103 
159104 /* initialize port state, note IB convention that HCA ports are always
160105  * numbered from 1
161106  */
162
-static int rxe_init_ports(struct rxe_dev *rxe)
107
+static void rxe_init_ports(struct rxe_dev *rxe)
163108 {
164109 	struct rxe_port *port = &rxe->port;
165110 
166111 	rxe_init_port_param(port);
167
-
168
-	port->pkey_tbl = kcalloc(port->attr.pkey_tbl_len,
169
-			sizeof(*port->pkey_tbl), GFP_KERNEL);
170
-
171
-	if (!port->pkey_tbl)
172
-		return -ENOMEM;
173
-
174
-	port->pkey_tbl[0] = 0xffff;
175112 	addrconf_addr_eui48((unsigned char *)&port->port_guid,
176113 			    rxe->ndev->dev_addr);
177
-
178114 	spin_lock_init(&port->port_lock);
179
-
180
-	return 0;
181115 }
182116 
183117 /* init pools of managed objects */
....@@ -267,28 +201,20 @@
267201 	/* init default device parameters */
268202 	rxe_init_device_param(rxe);
269203 
270
-	err = rxe_init_ports(rxe);
271
-	if (err)
272
-		goto err1;
204
+	rxe_init_ports(rxe);
273205 
274206 	err = rxe_init_pools(rxe);
275207 	if (err)
276
-		goto err2;
208
+		return err;
277209 
278210 	/* init pending mmap list */
279211 	spin_lock_init(&rxe->mmap_offset_lock);
280212 	spin_lock_init(&rxe->pending_lock);
281213 	INIT_LIST_HEAD(&rxe->pending_mmaps);
282
-	INIT_LIST_HEAD(&rxe->list);
283214 
284215 	mutex_init(&rxe->usdev_lock);
285216 
286217 	return 0;
287
-
288
-err2:
289
-	rxe_cleanup_ports(rxe);
290
-err1:
291
-	return err;
292218 }
293219 
294220 void rxe_set_mtu(struct rxe_dev *rxe, unsigned int ndev_mtu)
....@@ -299,7 +225,7 @@
299225 	mtu = eth_mtu_int_to_enum(ndev_mtu);
300226 
301227 	/* Make sure that new MTU in range */
302
-	mtu = mtu ? min_t(enum ib_mtu, mtu, RXE_PORT_MAX_MTU) : IB_MTU_256;
228
+	mtu = mtu ? min_t(enum ib_mtu, mtu, IB_MTU_4096) : IB_MTU_256;
303229 
304230 	port->attr.active_mtu = mtu;
305231 	port->mtu_cap = ib_mtu_enum_to_int(mtu);
....@@ -308,64 +234,77 @@
308234 /* called by ifc layer to create new rxe device.
309235  * The caller should allocate memory for rxe by calling ib_alloc_device.
310236  */
311
-int rxe_add(struct rxe_dev *rxe, unsigned int mtu)
237
+int rxe_add(struct rxe_dev *rxe, unsigned int mtu, const char *ibdev_name)
312238 {
313239 	int err;
314240 
315
-	kref_init(&rxe->ref_cnt);
316
-
317241 	err = rxe_init(rxe);
318242 	if (err)
319
-		goto err1;
243
+		return err;
320244 
321245 	rxe_set_mtu(rxe, mtu);
322246 
323
-	err = rxe_register_device(rxe);
324
-	if (err)
325
-		goto err1;
247
+	return rxe_register_device(rxe, ibdev_name);
248
+}
326249 
327
-	return 0;
250
+static int rxe_newlink(const char *ibdev_name, struct net_device *ndev)
251
+{
252
+	struct rxe_dev *exists;
253
+	int err = 0;
328254 
329
-err1:
330
-	rxe_dev_put(rxe);
255
+	if (is_vlan_dev(ndev)) {
256
+		pr_err("rxe creation allowed on top of a real device only\n");
257
+		err = -EPERM;
258
+		goto err;
259
+	}
260
+
261
+	exists = rxe_get_dev_from_net(ndev);
262
+	if (exists) {
263
+		ib_device_put(&exists->ib_dev);
264
+		pr_err("already configured on %s\n", ndev->name);
265
+		err = -EEXIST;
266
+		goto err;
267
+	}
268
+
269
+	err = rxe_net_add(ibdev_name, ndev);
270
+	if (err) {
271
+		pr_err("failed to add %s\n", ndev->name);
272
+		goto err;
273
+	}
274
+err:
331275 	return err;
332276 }
333277 
334
-/* called by the ifc layer to remove a device */
335
-void rxe_remove(struct rxe_dev *rxe)
336
-{
337
-	rxe_unregister_device(rxe);
338
-
339
-	rxe_dev_put(rxe);
340
-}
278
+static struct rdma_link_ops rxe_link_ops = {
279
+	.type = "rxe",
280
+	.newlink = rxe_newlink,
281
+};
341282 
342283 static int __init rxe_module_init(void)
343284 {
344285 	int err;
345286 
346
-	/* initialize slab caches for managed objects */
347
-	err = rxe_cache_init();
348
-	if (err) {
349
-		pr_err("unable to init object pools\n");
350
-		return err;
351
-	}
352
-
353287 	err = rxe_net_init();
354288 	if (err)
355289 		return err;
356290 
291
+	rdma_link_register(&rxe_link_ops);
292
+	rxe_initialized = true;
357293 	pr_info("loaded\n");
358294 	return 0;
359295 }
360296 
361297 static void __exit rxe_module_exit(void)
362298 {
363
-	rxe_remove_all();
299
+	rdma_link_unregister(&rxe_link_ops);
300
+	ib_unregister_driver(RDMA_DRIVER_RXE);
364301 	rxe_net_exit();
365
-	rxe_cache_exit();
366302 
303
+	rxe_initialized = false;
367304 	pr_info("unloaded\n");
368305 }
369306 
370307 late_initcall(rxe_module_init);
371308 module_exit(rxe_module_exit);
309
+
310
+MODULE_ALIAS_RDMA_LINK("rxe");