ehea_main.c 88 KB

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  1. /*
  2. * linux/drivers/net/ehea/ehea_main.c
  3. *
  4. * eHEA ethernet device driver for IBM eServer System p
  5. *
  6. * (C) Copyright IBM Corp. 2006
  7. *
  8. * Authors:
  9. * Christoph Raisch <raisch@de.ibm.com>
  10. * Jan-Bernd Themann <themann@de.ibm.com>
  11. * Thomas Klein <tklein@de.ibm.com>
  12. *
  13. *
  14. * This program is free software; you can redistribute it and/or modify
  15. * it under the terms of the GNU General Public License as published by
  16. * the Free Software Foundation; either version 2, or (at your option)
  17. * any later version.
  18. *
  19. * This program is distributed in the hope that it will be useful,
  20. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  22. * GNU General Public License for more details.
  23. *
  24. * You should have received a copy of the GNU General Public License
  25. * along with this program; if not, write to the Free Software
  26. * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  27. */
  28. #include <linux/in.h>
  29. #include <linux/ip.h>
  30. #include <linux/tcp.h>
  31. #include <linux/udp.h>
  32. #include <linux/if.h>
  33. #include <linux/list.h>
  34. #include <linux/slab.h>
  35. #include <linux/if_ether.h>
  36. #include <linux/notifier.h>
  37. #include <linux/reboot.h>
  38. #include <linux/memory.h>
  39. #include <asm/kexec.h>
  40. #include <linux/mutex.h>
  41. #include <net/ip.h>
  42. #include "ehea.h"
  43. #include "ehea_qmr.h"
  44. #include "ehea_phyp.h"
  45. MODULE_LICENSE("GPL");
  46. MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
  47. MODULE_DESCRIPTION("IBM eServer HEA Driver");
  48. MODULE_VERSION(DRV_VERSION);
  49. static int msg_level = -1;
  50. static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
  51. static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
  52. static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
  53. static int sq_entries = EHEA_DEF_ENTRIES_SQ;
  54. static int use_mcs;
  55. static int use_lro;
  56. static int lro_max_aggr = EHEA_LRO_MAX_AGGR;
  57. static int num_tx_qps = EHEA_NUM_TX_QP;
  58. static int prop_carrier_state;
  59. module_param(msg_level, int, 0);
  60. module_param(rq1_entries, int, 0);
  61. module_param(rq2_entries, int, 0);
  62. module_param(rq3_entries, int, 0);
  63. module_param(sq_entries, int, 0);
  64. module_param(prop_carrier_state, int, 0);
  65. module_param(use_mcs, int, 0);
  66. module_param(use_lro, int, 0);
  67. module_param(lro_max_aggr, int, 0);
  68. module_param(num_tx_qps, int, 0);
  69. MODULE_PARM_DESC(num_tx_qps, "Number of TX-QPS");
  70. MODULE_PARM_DESC(msg_level, "msg_level");
  71. MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
  72. "port to stack. 1:yes, 0:no. Default = 0 ");
  73. MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
  74. "[2^x - 1], x = [6..14]. Default = "
  75. __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
  76. MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
  77. "[2^x - 1], x = [6..14]. Default = "
  78. __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
  79. MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
  80. "[2^x - 1], x = [6..14]. Default = "
  81. __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
  82. MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue "
  83. "[2^x - 1], x = [6..14]. Default = "
  84. __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
  85. MODULE_PARM_DESC(use_mcs, " 0:NAPI, 1:Multiple receive queues, Default = 0 ");
  86. MODULE_PARM_DESC(lro_max_aggr, " LRO: Max packets to be aggregated. Default = "
  87. __MODULE_STRING(EHEA_LRO_MAX_AGGR));
  88. MODULE_PARM_DESC(use_lro, " Large Receive Offload, 1: enable, 0: disable, "
  89. "Default = 0");
  90. static int port_name_cnt;
  91. static LIST_HEAD(adapter_list);
  92. static unsigned long ehea_driver_flags;
  93. struct work_struct ehea_rereg_mr_task;
  94. static DEFINE_MUTEX(dlpar_mem_lock);
  95. struct ehea_fw_handle_array ehea_fw_handles;
  96. struct ehea_bcmc_reg_array ehea_bcmc_regs;
  97. static int __devinit ehea_probe_adapter(struct of_device *dev,
  98. const struct of_device_id *id);
  99. static int __devexit ehea_remove(struct of_device *dev);
  100. static struct of_device_id ehea_device_table[] = {
  101. {
  102. .name = "lhea",
  103. .compatible = "IBM,lhea",
  104. },
  105. {},
  106. };
  107. MODULE_DEVICE_TABLE(of, ehea_device_table);
  108. static struct of_platform_driver ehea_driver = {
  109. .name = "ehea",
  110. .match_table = ehea_device_table,
  111. .probe = ehea_probe_adapter,
  112. .remove = ehea_remove,
  113. };
  114. void ehea_dump(void *adr, int len, char *msg)
  115. {
  116. int x;
  117. unsigned char *deb = adr;
  118. for (x = 0; x < len; x += 16) {
  119. printk(DRV_NAME " %s adr=%p ofs=%04x %016llx %016llx\n", msg,
  120. deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
  121. deb += 16;
  122. }
  123. }
  124. void ehea_schedule_port_reset(struct ehea_port *port)
  125. {
  126. if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
  127. schedule_work(&port->reset_task);
  128. }
  129. static void ehea_update_firmware_handles(void)
  130. {
  131. struct ehea_fw_handle_entry *arr = NULL;
  132. struct ehea_adapter *adapter;
  133. int num_adapters = 0;
  134. int num_ports = 0;
  135. int num_portres = 0;
  136. int i = 0;
  137. int num_fw_handles, k, l;
  138. /* Determine number of handles */
  139. mutex_lock(&ehea_fw_handles.lock);
  140. list_for_each_entry(adapter, &adapter_list, list) {
  141. num_adapters++;
  142. for (k = 0; k < EHEA_MAX_PORTS; k++) {
  143. struct ehea_port *port = adapter->port[k];
  144. if (!port || (port->state != EHEA_PORT_UP))
  145. continue;
  146. num_ports++;
  147. num_portres += port->num_def_qps + port->num_add_tx_qps;
  148. }
  149. }
  150. num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
  151. num_ports * EHEA_NUM_PORT_FW_HANDLES +
  152. num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
  153. if (num_fw_handles) {
  154. arr = kzalloc(num_fw_handles * sizeof(*arr), GFP_KERNEL);
  155. if (!arr)
  156. goto out; /* Keep the existing array */
  157. } else
  158. goto out_update;
  159. list_for_each_entry(adapter, &adapter_list, list) {
  160. if (num_adapters == 0)
  161. break;
  162. for (k = 0; k < EHEA_MAX_PORTS; k++) {
  163. struct ehea_port *port = adapter->port[k];
  164. if (!port || (port->state != EHEA_PORT_UP) ||
  165. (num_ports == 0))
  166. continue;
  167. for (l = 0;
  168. l < port->num_def_qps + port->num_add_tx_qps;
  169. l++) {
  170. struct ehea_port_res *pr = &port->port_res[l];
  171. arr[i].adh = adapter->handle;
  172. arr[i++].fwh = pr->qp->fw_handle;
  173. arr[i].adh = adapter->handle;
  174. arr[i++].fwh = pr->send_cq->fw_handle;
  175. arr[i].adh = adapter->handle;
  176. arr[i++].fwh = pr->recv_cq->fw_handle;
  177. arr[i].adh = adapter->handle;
  178. arr[i++].fwh = pr->eq->fw_handle;
  179. arr[i].adh = adapter->handle;
  180. arr[i++].fwh = pr->send_mr.handle;
  181. arr[i].adh = adapter->handle;
  182. arr[i++].fwh = pr->recv_mr.handle;
  183. }
  184. arr[i].adh = adapter->handle;
  185. arr[i++].fwh = port->qp_eq->fw_handle;
  186. num_ports--;
  187. }
  188. arr[i].adh = adapter->handle;
  189. arr[i++].fwh = adapter->neq->fw_handle;
  190. if (adapter->mr.handle) {
  191. arr[i].adh = adapter->handle;
  192. arr[i++].fwh = adapter->mr.handle;
  193. }
  194. num_adapters--;
  195. }
  196. out_update:
  197. kfree(ehea_fw_handles.arr);
  198. ehea_fw_handles.arr = arr;
  199. ehea_fw_handles.num_entries = i;
  200. out:
  201. mutex_unlock(&ehea_fw_handles.lock);
  202. }
  203. static void ehea_update_bcmc_registrations(void)
  204. {
  205. unsigned long flags;
  206. struct ehea_bcmc_reg_entry *arr = NULL;
  207. struct ehea_adapter *adapter;
  208. struct ehea_mc_list *mc_entry;
  209. int num_registrations = 0;
  210. int i = 0;
  211. int k;
  212. spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);
  213. /* Determine number of registrations */
  214. list_for_each_entry(adapter, &adapter_list, list)
  215. for (k = 0; k < EHEA_MAX_PORTS; k++) {
  216. struct ehea_port *port = adapter->port[k];
  217. if (!port || (port->state != EHEA_PORT_UP))
  218. continue;
  219. num_registrations += 2; /* Broadcast registrations */
  220. list_for_each_entry(mc_entry, &port->mc_list->list,list)
  221. num_registrations += 2;
  222. }
  223. if (num_registrations) {
  224. arr = kzalloc(num_registrations * sizeof(*arr), GFP_ATOMIC);
  225. if (!arr)
  226. goto out; /* Keep the existing array */
  227. } else
  228. goto out_update;
  229. list_for_each_entry(adapter, &adapter_list, list) {
  230. for (k = 0; k < EHEA_MAX_PORTS; k++) {
  231. struct ehea_port *port = adapter->port[k];
  232. if (!port || (port->state != EHEA_PORT_UP))
  233. continue;
  234. if (num_registrations == 0)
  235. goto out_update;
  236. arr[i].adh = adapter->handle;
  237. arr[i].port_id = port->logical_port_id;
  238. arr[i].reg_type = EHEA_BCMC_BROADCAST |
  239. EHEA_BCMC_UNTAGGED;
  240. arr[i++].macaddr = port->mac_addr;
  241. arr[i].adh = adapter->handle;
  242. arr[i].port_id = port->logical_port_id;
  243. arr[i].reg_type = EHEA_BCMC_BROADCAST |
  244. EHEA_BCMC_VLANID_ALL;
  245. arr[i++].macaddr = port->mac_addr;
  246. num_registrations -= 2;
  247. list_for_each_entry(mc_entry,
  248. &port->mc_list->list, list) {
  249. if (num_registrations == 0)
  250. goto out_update;
  251. arr[i].adh = adapter->handle;
  252. arr[i].port_id = port->logical_port_id;
  253. arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
  254. EHEA_BCMC_MULTICAST |
  255. EHEA_BCMC_UNTAGGED;
  256. arr[i++].macaddr = mc_entry->macaddr;
  257. arr[i].adh = adapter->handle;
  258. arr[i].port_id = port->logical_port_id;
  259. arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
  260. EHEA_BCMC_MULTICAST |
  261. EHEA_BCMC_VLANID_ALL;
  262. arr[i++].macaddr = mc_entry->macaddr;
  263. num_registrations -= 2;
  264. }
  265. }
  266. }
  267. out_update:
  268. kfree(ehea_bcmc_regs.arr);
  269. ehea_bcmc_regs.arr = arr;
  270. ehea_bcmc_regs.num_entries = i;
  271. out:
  272. spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
  273. }
  274. static struct net_device_stats *ehea_get_stats(struct net_device *dev)
  275. {
  276. struct ehea_port *port = netdev_priv(dev);
  277. struct net_device_stats *stats = &port->stats;
  278. struct hcp_ehea_port_cb2 *cb2;
  279. u64 hret, rx_packets, tx_packets;
  280. int i;
  281. memset(stats, 0, sizeof(*stats));
  282. cb2 = (void *)get_zeroed_page(GFP_ATOMIC);
  283. if (!cb2) {
  284. ehea_error("no mem for cb2");
  285. goto out;
  286. }
  287. hret = ehea_h_query_ehea_port(port->adapter->handle,
  288. port->logical_port_id,
  289. H_PORT_CB2, H_PORT_CB2_ALL, cb2);
  290. if (hret != H_SUCCESS) {
  291. ehea_error("query_ehea_port failed");
  292. goto out_herr;
  293. }
  294. if (netif_msg_hw(port))
  295. ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
  296. rx_packets = 0;
  297. for (i = 0; i < port->num_def_qps; i++)
  298. rx_packets += port->port_res[i].rx_packets;
  299. tx_packets = 0;
  300. for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
  301. tx_packets += port->port_res[i].tx_packets;
  302. stats->tx_packets = tx_packets;
  303. stats->multicast = cb2->rxmcp;
  304. stats->rx_errors = cb2->rxuerr;
  305. stats->rx_bytes = cb2->rxo;
  306. stats->tx_bytes = cb2->txo;
  307. stats->rx_packets = rx_packets;
  308. out_herr:
  309. free_page((unsigned long)cb2);
  310. out:
  311. return stats;
  312. }
  313. static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
  314. {
  315. struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
  316. struct net_device *dev = pr->port->netdev;
  317. int max_index_mask = pr->rq1_skba.len - 1;
  318. int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
  319. int adder = 0;
  320. int i;
  321. pr->rq1_skba.os_skbs = 0;
  322. if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
  323. if (nr_of_wqes > 0)
  324. pr->rq1_skba.index = index;
  325. pr->rq1_skba.os_skbs = fill_wqes;
  326. return;
  327. }
  328. for (i = 0; i < fill_wqes; i++) {
  329. if (!skb_arr_rq1[index]) {
  330. skb_arr_rq1[index] = netdev_alloc_skb(dev,
  331. EHEA_L_PKT_SIZE);
  332. if (!skb_arr_rq1[index]) {
  333. pr->rq1_skba.os_skbs = fill_wqes - i;
  334. break;
  335. }
  336. }
  337. index--;
  338. index &= max_index_mask;
  339. adder++;
  340. }
  341. if (adder == 0)
  342. return;
  343. /* Ring doorbell */
  344. ehea_update_rq1a(pr->qp, adder);
  345. }
  346. static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
  347. {
  348. struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
  349. struct net_device *dev = pr->port->netdev;
  350. int i;
  351. for (i = 0; i < pr->rq1_skba.len; i++) {
  352. skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
  353. if (!skb_arr_rq1[i])
  354. break;
  355. }
  356. /* Ring doorbell */
  357. ehea_update_rq1a(pr->qp, nr_rq1a);
  358. }
  359. static int ehea_refill_rq_def(struct ehea_port_res *pr,
  360. struct ehea_q_skb_arr *q_skba, int rq_nr,
  361. int num_wqes, int wqe_type, int packet_size)
  362. {
  363. struct net_device *dev = pr->port->netdev;
  364. struct ehea_qp *qp = pr->qp;
  365. struct sk_buff **skb_arr = q_skba->arr;
  366. struct ehea_rwqe *rwqe;
  367. int i, index, max_index_mask, fill_wqes;
  368. int adder = 0;
  369. int ret = 0;
  370. fill_wqes = q_skba->os_skbs + num_wqes;
  371. q_skba->os_skbs = 0;
  372. if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
  373. q_skba->os_skbs = fill_wqes;
  374. return ret;
  375. }
  376. index = q_skba->index;
  377. max_index_mask = q_skba->len - 1;
  378. for (i = 0; i < fill_wqes; i++) {
  379. u64 tmp_addr;
  380. struct sk_buff *skb;
  381. skb = netdev_alloc_skb_ip_align(dev, packet_size);
  382. if (!skb) {
  383. q_skba->os_skbs = fill_wqes - i;
  384. if (q_skba->os_skbs == q_skba->len - 2) {
  385. ehea_info("%s: rq%i ran dry - no mem for skb",
  386. pr->port->netdev->name, rq_nr);
  387. ret = -ENOMEM;
  388. }
  389. break;
  390. }
  391. skb_arr[index] = skb;
  392. tmp_addr = ehea_map_vaddr(skb->data);
  393. if (tmp_addr == -1) {
  394. dev_kfree_skb(skb);
  395. q_skba->os_skbs = fill_wqes - i;
  396. ret = 0;
  397. break;
  398. }
  399. rwqe = ehea_get_next_rwqe(qp, rq_nr);
  400. rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
  401. | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
  402. rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
  403. rwqe->sg_list[0].vaddr = tmp_addr;
  404. rwqe->sg_list[0].len = packet_size;
  405. rwqe->data_segments = 1;
  406. index++;
  407. index &= max_index_mask;
  408. adder++;
  409. }
  410. q_skba->index = index;
  411. if (adder == 0)
  412. goto out;
  413. /* Ring doorbell */
  414. iosync();
  415. if (rq_nr == 2)
  416. ehea_update_rq2a(pr->qp, adder);
  417. else
  418. ehea_update_rq3a(pr->qp, adder);
  419. out:
  420. return ret;
  421. }
  422. static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
  423. {
  424. return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
  425. nr_of_wqes, EHEA_RWQE2_TYPE,
  426. EHEA_RQ2_PKT_SIZE);
  427. }
  428. static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
  429. {
  430. return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
  431. nr_of_wqes, EHEA_RWQE3_TYPE,
  432. EHEA_MAX_PACKET_SIZE);
  433. }
  434. static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
  435. {
  436. *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
  437. if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
  438. return 0;
  439. if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
  440. (cqe->header_length == 0))
  441. return 0;
  442. return -EINVAL;
  443. }
  444. static inline void ehea_fill_skb(struct net_device *dev,
  445. struct sk_buff *skb, struct ehea_cqe *cqe)
  446. {
  447. int length = cqe->num_bytes_transfered - 4; /*remove CRC */
  448. skb_put(skb, length);
  449. skb->ip_summed = CHECKSUM_UNNECESSARY;
  450. skb->protocol = eth_type_trans(skb, dev);
  451. }
  452. static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
  453. int arr_len,
  454. struct ehea_cqe *cqe)
  455. {
  456. int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
  457. struct sk_buff *skb;
  458. void *pref;
  459. int x;
  460. x = skb_index + 1;
  461. x &= (arr_len - 1);
  462. pref = skb_array[x];
  463. if (pref) {
  464. prefetchw(pref);
  465. prefetchw(pref + EHEA_CACHE_LINE);
  466. pref = (skb_array[x]->data);
  467. prefetch(pref);
  468. prefetch(pref + EHEA_CACHE_LINE);
  469. prefetch(pref + EHEA_CACHE_LINE * 2);
  470. prefetch(pref + EHEA_CACHE_LINE * 3);
  471. }
  472. skb = skb_array[skb_index];
  473. skb_array[skb_index] = NULL;
  474. return skb;
  475. }
  476. static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
  477. int arr_len, int wqe_index)
  478. {
  479. struct sk_buff *skb;
  480. void *pref;
  481. int x;
  482. x = wqe_index + 1;
  483. x &= (arr_len - 1);
  484. pref = skb_array[x];
  485. if (pref) {
  486. prefetchw(pref);
  487. prefetchw(pref + EHEA_CACHE_LINE);
  488. pref = (skb_array[x]->data);
  489. prefetchw(pref);
  490. prefetchw(pref + EHEA_CACHE_LINE);
  491. }
  492. skb = skb_array[wqe_index];
  493. skb_array[wqe_index] = NULL;
  494. return skb;
  495. }
  496. static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
  497. struct ehea_cqe *cqe, int *processed_rq2,
  498. int *processed_rq3)
  499. {
  500. struct sk_buff *skb;
  501. if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
  502. pr->p_stats.err_tcp_cksum++;
  503. if (cqe->status & EHEA_CQE_STAT_ERR_IP)
  504. pr->p_stats.err_ip_cksum++;
  505. if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
  506. pr->p_stats.err_frame_crc++;
  507. if (rq == 2) {
  508. *processed_rq2 += 1;
  509. skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
  510. dev_kfree_skb(skb);
  511. } else if (rq == 3) {
  512. *processed_rq3 += 1;
  513. skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
  514. dev_kfree_skb(skb);
  515. }
  516. if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
  517. if (netif_msg_rx_err(pr->port)) {
  518. ehea_error("Critical receive error for QP %d. "
  519. "Resetting port.", pr->qp->init_attr.qp_nr);
  520. ehea_dump(cqe, sizeof(*cqe), "CQE");
  521. }
  522. ehea_schedule_port_reset(pr->port);
  523. return 1;
  524. }
  525. return 0;
  526. }
  527. static int get_skb_hdr(struct sk_buff *skb, void **iphdr,
  528. void **tcph, u64 *hdr_flags, void *priv)
  529. {
  530. struct ehea_cqe *cqe = priv;
  531. unsigned int ip_len;
  532. struct iphdr *iph;
  533. /* non tcp/udp packets */
  534. if (!cqe->header_length)
  535. return -1;
  536. /* non tcp packet */
  537. skb_reset_network_header(skb);
  538. iph = ip_hdr(skb);
  539. if (iph->protocol != IPPROTO_TCP)
  540. return -1;
  541. ip_len = ip_hdrlen(skb);
  542. skb_set_transport_header(skb, ip_len);
  543. *tcph = tcp_hdr(skb);
  544. /* check if ip header and tcp header are complete */
  545. if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
  546. return -1;
  547. *hdr_flags = LRO_IPV4 | LRO_TCP;
  548. *iphdr = iph;
  549. return 0;
  550. }
  551. static void ehea_proc_skb(struct ehea_port_res *pr, struct ehea_cqe *cqe,
  552. struct sk_buff *skb)
  553. {
  554. int vlan_extracted = ((cqe->status & EHEA_CQE_VLAN_TAG_XTRACT) &&
  555. pr->port->vgrp);
  556. if (use_lro) {
  557. if (vlan_extracted)
  558. lro_vlan_hwaccel_receive_skb(&pr->lro_mgr, skb,
  559. pr->port->vgrp,
  560. cqe->vlan_tag,
  561. cqe);
  562. else
  563. lro_receive_skb(&pr->lro_mgr, skb, cqe);
  564. } else {
  565. if (vlan_extracted)
  566. vlan_hwaccel_receive_skb(skb, pr->port->vgrp,
  567. cqe->vlan_tag);
  568. else
  569. netif_receive_skb(skb);
  570. }
  571. }
  572. static int ehea_proc_rwqes(struct net_device *dev,
  573. struct ehea_port_res *pr,
  574. int budget)
  575. {
  576. struct ehea_port *port = pr->port;
  577. struct ehea_qp *qp = pr->qp;
  578. struct ehea_cqe *cqe;
  579. struct sk_buff *skb;
  580. struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
  581. struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
  582. struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
  583. int skb_arr_rq1_len = pr->rq1_skba.len;
  584. int skb_arr_rq2_len = pr->rq2_skba.len;
  585. int skb_arr_rq3_len = pr->rq3_skba.len;
  586. int processed, processed_rq1, processed_rq2, processed_rq3;
  587. int wqe_index, last_wqe_index, rq, port_reset;
  588. processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
  589. last_wqe_index = 0;
  590. cqe = ehea_poll_rq1(qp, &wqe_index);
  591. while ((processed < budget) && cqe) {
  592. ehea_inc_rq1(qp);
  593. processed_rq1++;
  594. processed++;
  595. if (netif_msg_rx_status(port))
  596. ehea_dump(cqe, sizeof(*cqe), "CQE");
  597. last_wqe_index = wqe_index;
  598. rmb();
  599. if (!ehea_check_cqe(cqe, &rq)) {
  600. if (rq == 1) {
  601. /* LL RQ1 */
  602. skb = get_skb_by_index_ll(skb_arr_rq1,
  603. skb_arr_rq1_len,
  604. wqe_index);
  605. if (unlikely(!skb)) {
  606. if (netif_msg_rx_err(port))
  607. ehea_error("LL rq1: skb=NULL");
  608. skb = netdev_alloc_skb(dev,
  609. EHEA_L_PKT_SIZE);
  610. if (!skb)
  611. break;
  612. }
  613. skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
  614. cqe->num_bytes_transfered - 4);
  615. ehea_fill_skb(dev, skb, cqe);
  616. } else if (rq == 2) {
  617. /* RQ2 */
  618. skb = get_skb_by_index(skb_arr_rq2,
  619. skb_arr_rq2_len, cqe);
  620. if (unlikely(!skb)) {
  621. if (netif_msg_rx_err(port))
  622. ehea_error("rq2: skb=NULL");
  623. break;
  624. }
  625. ehea_fill_skb(dev, skb, cqe);
  626. processed_rq2++;
  627. } else {
  628. /* RQ3 */
  629. skb = get_skb_by_index(skb_arr_rq3,
  630. skb_arr_rq3_len, cqe);
  631. if (unlikely(!skb)) {
  632. if (netif_msg_rx_err(port))
  633. ehea_error("rq3: skb=NULL");
  634. break;
  635. }
  636. ehea_fill_skb(dev, skb, cqe);
  637. processed_rq3++;
  638. }
  639. ehea_proc_skb(pr, cqe, skb);
  640. } else {
  641. pr->p_stats.poll_receive_errors++;
  642. port_reset = ehea_treat_poll_error(pr, rq, cqe,
  643. &processed_rq2,
  644. &processed_rq3);
  645. if (port_reset)
  646. break;
  647. }
  648. cqe = ehea_poll_rq1(qp, &wqe_index);
  649. }
  650. if (use_lro)
  651. lro_flush_all(&pr->lro_mgr);
  652. pr->rx_packets += processed;
  653. ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
  654. ehea_refill_rq2(pr, processed_rq2);
  655. ehea_refill_rq3(pr, processed_rq3);
  656. return processed;
  657. }
  658. static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
  659. {
  660. struct sk_buff *skb;
  661. struct ehea_cq *send_cq = pr->send_cq;
  662. struct ehea_cqe *cqe;
  663. int quota = my_quota;
  664. int cqe_counter = 0;
  665. int swqe_av = 0;
  666. int index;
  667. unsigned long flags;
  668. cqe = ehea_poll_cq(send_cq);
  669. while (cqe && (quota > 0)) {
  670. ehea_inc_cq(send_cq);
  671. cqe_counter++;
  672. rmb();
  673. if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
  674. ehea_error("Bad send completion status=0x%04X",
  675. cqe->status);
  676. if (netif_msg_tx_err(pr->port))
  677. ehea_dump(cqe, sizeof(*cqe), "Send CQE");
  678. if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
  679. ehea_error("Resetting port");
  680. ehea_schedule_port_reset(pr->port);
  681. break;
  682. }
  683. }
  684. if (netif_msg_tx_done(pr->port))
  685. ehea_dump(cqe, sizeof(*cqe), "CQE");
  686. if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
  687. == EHEA_SWQE2_TYPE)) {
  688. index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
  689. skb = pr->sq_skba.arr[index];
  690. dev_kfree_skb(skb);
  691. pr->sq_skba.arr[index] = NULL;
  692. }
  693. swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
  694. quota--;
  695. cqe = ehea_poll_cq(send_cq);
  696. };
  697. ehea_update_feca(send_cq, cqe_counter);
  698. atomic_add(swqe_av, &pr->swqe_avail);
  699. spin_lock_irqsave(&pr->netif_queue, flags);
  700. if (pr->queue_stopped && (atomic_read(&pr->swqe_avail)
  701. >= pr->swqe_refill_th)) {
  702. netif_wake_queue(pr->port->netdev);
  703. pr->queue_stopped = 0;
  704. }
  705. spin_unlock_irqrestore(&pr->netif_queue, flags);
  706. return cqe;
  707. }
  708. #define EHEA_NAPI_POLL_NUM_BEFORE_IRQ 16
  709. #define EHEA_POLL_MAX_CQES 65535
  710. static int ehea_poll(struct napi_struct *napi, int budget)
  711. {
  712. struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
  713. napi);
  714. struct net_device *dev = pr->port->netdev;
  715. struct ehea_cqe *cqe;
  716. struct ehea_cqe *cqe_skb = NULL;
  717. int force_irq, wqe_index;
  718. int rx = 0;
  719. force_irq = (pr->poll_counter > EHEA_NAPI_POLL_NUM_BEFORE_IRQ);
  720. cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
  721. if (!force_irq)
  722. rx += ehea_proc_rwqes(dev, pr, budget - rx);
  723. while ((rx != budget) || force_irq) {
  724. pr->poll_counter = 0;
  725. force_irq = 0;
  726. napi_complete(napi);
  727. ehea_reset_cq_ep(pr->recv_cq);
  728. ehea_reset_cq_ep(pr->send_cq);
  729. ehea_reset_cq_n1(pr->recv_cq);
  730. ehea_reset_cq_n1(pr->send_cq);
  731. cqe = ehea_poll_rq1(pr->qp, &wqe_index);
  732. cqe_skb = ehea_poll_cq(pr->send_cq);
  733. if (!cqe && !cqe_skb)
  734. return rx;
  735. if (!napi_reschedule(napi))
  736. return rx;
  737. cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
  738. rx += ehea_proc_rwqes(dev, pr, budget - rx);
  739. }
  740. pr->poll_counter++;
  741. return rx;
  742. }
  743. #ifdef CONFIG_NET_POLL_CONTROLLER
  744. static void ehea_netpoll(struct net_device *dev)
  745. {
  746. struct ehea_port *port = netdev_priv(dev);
  747. int i;
  748. for (i = 0; i < port->num_def_qps; i++)
  749. napi_schedule(&port->port_res[i].napi);
  750. }
  751. #endif
  752. static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
  753. {
  754. struct ehea_port_res *pr = param;
  755. napi_schedule(&pr->napi);
  756. return IRQ_HANDLED;
  757. }
  758. static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
  759. {
  760. struct ehea_port *port = param;
  761. struct ehea_eqe *eqe;
  762. struct ehea_qp *qp;
  763. u32 qp_token;
  764. u64 resource_type, aer, aerr;
  765. int reset_port = 0;
  766. eqe = ehea_poll_eq(port->qp_eq);
  767. while (eqe) {
  768. qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
  769. ehea_error("QP aff_err: entry=0x%llx, token=0x%x",
  770. eqe->entry, qp_token);
  771. qp = port->port_res[qp_token].qp;
  772. resource_type = ehea_error_data(port->adapter, qp->fw_handle,
  773. &aer, &aerr);
  774. if (resource_type == EHEA_AER_RESTYPE_QP) {
  775. if ((aer & EHEA_AER_RESET_MASK) ||
  776. (aerr & EHEA_AERR_RESET_MASK))
  777. reset_port = 1;
  778. } else
  779. reset_port = 1; /* Reset in case of CQ or EQ error */
  780. eqe = ehea_poll_eq(port->qp_eq);
  781. }
  782. if (reset_port) {
  783. ehea_error("Resetting port");
  784. ehea_schedule_port_reset(port);
  785. }
  786. return IRQ_HANDLED;
  787. }
  788. static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
  789. int logical_port)
  790. {
  791. int i;
  792. for (i = 0; i < EHEA_MAX_PORTS; i++)
  793. if (adapter->port[i])
  794. if (adapter->port[i]->logical_port_id == logical_port)
  795. return adapter->port[i];
  796. return NULL;
  797. }
  798. int ehea_sense_port_attr(struct ehea_port *port)
  799. {
  800. int ret;
  801. u64 hret;
  802. struct hcp_ehea_port_cb0 *cb0;
  803. /* may be called via ehea_neq_tasklet() */
  804. cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
  805. if (!cb0) {
  806. ehea_error("no mem for cb0");
  807. ret = -ENOMEM;
  808. goto out;
  809. }
  810. hret = ehea_h_query_ehea_port(port->adapter->handle,
  811. port->logical_port_id, H_PORT_CB0,
  812. EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
  813. cb0);
  814. if (hret != H_SUCCESS) {
  815. ret = -EIO;
  816. goto out_free;
  817. }
  818. /* MAC address */
  819. port->mac_addr = cb0->port_mac_addr << 16;
  820. if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
  821. ret = -EADDRNOTAVAIL;
  822. goto out_free;
  823. }
  824. /* Port speed */
  825. switch (cb0->port_speed) {
  826. case H_SPEED_10M_H:
  827. port->port_speed = EHEA_SPEED_10M;
  828. port->full_duplex = 0;
  829. break;
  830. case H_SPEED_10M_F:
  831. port->port_speed = EHEA_SPEED_10M;
  832. port->full_duplex = 1;
  833. break;
  834. case H_SPEED_100M_H:
  835. port->port_speed = EHEA_SPEED_100M;
  836. port->full_duplex = 0;
  837. break;
  838. case H_SPEED_100M_F:
  839. port->port_speed = EHEA_SPEED_100M;
  840. port->full_duplex = 1;
  841. break;
  842. case H_SPEED_1G_F:
  843. port->port_speed = EHEA_SPEED_1G;
  844. port->full_duplex = 1;
  845. break;
  846. case H_SPEED_10G_F:
  847. port->port_speed = EHEA_SPEED_10G;
  848. port->full_duplex = 1;
  849. break;
  850. default:
  851. port->port_speed = 0;
  852. port->full_duplex = 0;
  853. break;
  854. }
  855. port->autoneg = 1;
  856. port->num_mcs = cb0->num_default_qps;
  857. /* Number of default QPs */
  858. if (use_mcs)
  859. port->num_def_qps = cb0->num_default_qps;
  860. else
  861. port->num_def_qps = 1;
  862. if (!port->num_def_qps) {
  863. ret = -EINVAL;
  864. goto out_free;
  865. }
  866. port->num_tx_qps = num_tx_qps;
  867. if (port->num_def_qps >= port->num_tx_qps)
  868. port->num_add_tx_qps = 0;
  869. else
  870. port->num_add_tx_qps = port->num_tx_qps - port->num_def_qps;
  871. ret = 0;
  872. out_free:
  873. if (ret || netif_msg_probe(port))
  874. ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
  875. free_page((unsigned long)cb0);
  876. out:
  877. return ret;
  878. }
  879. int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
  880. {
  881. struct hcp_ehea_port_cb4 *cb4;
  882. u64 hret;
  883. int ret = 0;
  884. cb4 = (void *)get_zeroed_page(GFP_KERNEL);
  885. if (!cb4) {
  886. ehea_error("no mem for cb4");
  887. ret = -ENOMEM;
  888. goto out;
  889. }
  890. cb4->port_speed = port_speed;
  891. netif_carrier_off(port->netdev);
  892. hret = ehea_h_modify_ehea_port(port->adapter->handle,
  893. port->logical_port_id,
  894. H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
  895. if (hret == H_SUCCESS) {
  896. port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
  897. hret = ehea_h_query_ehea_port(port->adapter->handle,
  898. port->logical_port_id,
  899. H_PORT_CB4, H_PORT_CB4_SPEED,
  900. cb4);
  901. if (hret == H_SUCCESS) {
  902. switch (cb4->port_speed) {
  903. case H_SPEED_10M_H:
  904. port->port_speed = EHEA_SPEED_10M;
  905. port->full_duplex = 0;
  906. break;
  907. case H_SPEED_10M_F:
  908. port->port_speed = EHEA_SPEED_10M;
  909. port->full_duplex = 1;
  910. break;
  911. case H_SPEED_100M_H:
  912. port->port_speed = EHEA_SPEED_100M;
  913. port->full_duplex = 0;
  914. break;
  915. case H_SPEED_100M_F:
  916. port->port_speed = EHEA_SPEED_100M;
  917. port->full_duplex = 1;
  918. break;
  919. case H_SPEED_1G_F:
  920. port->port_speed = EHEA_SPEED_1G;
  921. port->full_duplex = 1;
  922. break;
  923. case H_SPEED_10G_F:
  924. port->port_speed = EHEA_SPEED_10G;
  925. port->full_duplex = 1;
  926. break;
  927. default:
  928. port->port_speed = 0;
  929. port->full_duplex = 0;
  930. break;
  931. }
  932. } else {
  933. ehea_error("Failed sensing port speed");
  934. ret = -EIO;
  935. }
  936. } else {
  937. if (hret == H_AUTHORITY) {
  938. ehea_info("Hypervisor denied setting port speed");
  939. ret = -EPERM;
  940. } else {
  941. ret = -EIO;
  942. ehea_error("Failed setting port speed");
  943. }
  944. }
  945. if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
  946. netif_carrier_on(port->netdev);
  947. free_page((unsigned long)cb4);
  948. out:
  949. return ret;
  950. }
  951. static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
  952. {
  953. int ret;
  954. u8 ec;
  955. u8 portnum;
  956. struct ehea_port *port;
  957. ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
  958. portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
  959. port = ehea_get_port(adapter, portnum);
  960. switch (ec) {
  961. case EHEA_EC_PORTSTATE_CHG: /* port state change */
  962. if (!port) {
  963. ehea_error("unknown portnum %x", portnum);
  964. break;
  965. }
  966. if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
  967. if (!netif_carrier_ok(port->netdev)) {
  968. ret = ehea_sense_port_attr(port);
  969. if (ret) {
  970. ehea_error("failed resensing port "
  971. "attributes");
  972. break;
  973. }
  974. if (netif_msg_link(port))
  975. ehea_info("%s: Logical port up: %dMbps "
  976. "%s Duplex",
  977. port->netdev->name,
  978. port->port_speed,
  979. port->full_duplex ==
  980. 1 ? "Full" : "Half");
  981. netif_carrier_on(port->netdev);
  982. netif_wake_queue(port->netdev);
  983. }
  984. } else
  985. if (netif_carrier_ok(port->netdev)) {
  986. if (netif_msg_link(port))
  987. ehea_info("%s: Logical port down",
  988. port->netdev->name);
  989. netif_carrier_off(port->netdev);
  990. netif_stop_queue(port->netdev);
  991. }
  992. if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
  993. port->phy_link = EHEA_PHY_LINK_UP;
  994. if (netif_msg_link(port))
  995. ehea_info("%s: Physical port up",
  996. port->netdev->name);
  997. if (prop_carrier_state)
  998. netif_carrier_on(port->netdev);
  999. } else {
  1000. port->phy_link = EHEA_PHY_LINK_DOWN;
  1001. if (netif_msg_link(port))
  1002. ehea_info("%s: Physical port down",
  1003. port->netdev->name);
  1004. if (prop_carrier_state)
  1005. netif_carrier_off(port->netdev);
  1006. }
  1007. if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
  1008. ehea_info("External switch port is primary port");
  1009. else
  1010. ehea_info("External switch port is backup port");
  1011. break;
  1012. case EHEA_EC_ADAPTER_MALFUNC:
  1013. ehea_error("Adapter malfunction");
  1014. break;
  1015. case EHEA_EC_PORT_MALFUNC:
  1016. ehea_info("Port malfunction: Device: %s", port->netdev->name);
  1017. netif_carrier_off(port->netdev);
  1018. netif_stop_queue(port->netdev);
  1019. break;
  1020. default:
  1021. ehea_error("unknown event code %x, eqe=0x%llX", ec, eqe);
  1022. break;
  1023. }
  1024. }
  1025. static void ehea_neq_tasklet(unsigned long data)
  1026. {
  1027. struct ehea_adapter *adapter = (struct ehea_adapter *)data;
  1028. struct ehea_eqe *eqe;
  1029. u64 event_mask;
  1030. eqe = ehea_poll_eq(adapter->neq);
  1031. ehea_debug("eqe=%p", eqe);
  1032. while (eqe) {
  1033. ehea_debug("*eqe=%lx", eqe->entry);
  1034. ehea_parse_eqe(adapter, eqe->entry);
  1035. eqe = ehea_poll_eq(adapter->neq);
  1036. ehea_debug("next eqe=%p", eqe);
  1037. }
  1038. event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
  1039. | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
  1040. | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
  1041. ehea_h_reset_events(adapter->handle,
  1042. adapter->neq->fw_handle, event_mask);
  1043. }
  1044. static irqreturn_t ehea_interrupt_neq(int irq, void *param)
  1045. {
  1046. struct ehea_adapter *adapter = param;
  1047. tasklet_hi_schedule(&adapter->neq_tasklet);
  1048. return IRQ_HANDLED;
  1049. }
  1050. static int ehea_fill_port_res(struct ehea_port_res *pr)
  1051. {
  1052. int ret;
  1053. struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
  1054. ehea_init_fill_rq1(pr, init_attr->act_nr_rwqes_rq1
  1055. - init_attr->act_nr_rwqes_rq2
  1056. - init_attr->act_nr_rwqes_rq3 - 1);
  1057. ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
  1058. ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
  1059. return ret;
  1060. }
  1061. static int ehea_reg_interrupts(struct net_device *dev)
  1062. {
  1063. struct ehea_port *port = netdev_priv(dev);
  1064. struct ehea_port_res *pr;
  1065. int i, ret;
  1066. snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
  1067. dev->name);
  1068. ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
  1069. ehea_qp_aff_irq_handler,
  1070. IRQF_DISABLED, port->int_aff_name, port);
  1071. if (ret) {
  1072. ehea_error("failed registering irq for qp_aff_irq_handler:"
  1073. "ist=%X", port->qp_eq->attr.ist1);
  1074. goto out_free_qpeq;
  1075. }
  1076. if (netif_msg_ifup(port))
  1077. ehea_info("irq_handle 0x%X for function qp_aff_irq_handler "
  1078. "registered", port->qp_eq->attr.ist1);
  1079. for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
  1080. pr = &port->port_res[i];
  1081. snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
  1082. "%s-queue%d", dev->name, i);
  1083. ret = ibmebus_request_irq(pr->eq->attr.ist1,
  1084. ehea_recv_irq_handler,
  1085. IRQF_DISABLED, pr->int_send_name,
  1086. pr);
  1087. if (ret) {
  1088. ehea_error("failed registering irq for ehea_queue "
  1089. "port_res_nr:%d, ist=%X", i,
  1090. pr->eq->attr.ist1);
  1091. goto out_free_req;
  1092. }
  1093. if (netif_msg_ifup(port))
  1094. ehea_info("irq_handle 0x%X for function ehea_queue_int "
  1095. "%d registered", pr->eq->attr.ist1, i);
  1096. }
  1097. out:
  1098. return ret;
  1099. out_free_req:
  1100. while (--i >= 0) {
  1101. u32 ist = port->port_res[i].eq->attr.ist1;
  1102. ibmebus_free_irq(ist, &port->port_res[i]);
  1103. }
  1104. out_free_qpeq:
  1105. ibmebus_free_irq(port->qp_eq->attr.ist1, port);
  1106. i = port->num_def_qps;
  1107. goto out;
  1108. }
  1109. static void ehea_free_interrupts(struct net_device *dev)
  1110. {
  1111. struct ehea_port *port = netdev_priv(dev);
  1112. struct ehea_port_res *pr;
  1113. int i;
  1114. /* send */
  1115. for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
  1116. pr = &port->port_res[i];
  1117. ibmebus_free_irq(pr->eq->attr.ist1, pr);
  1118. if (netif_msg_intr(port))
  1119. ehea_info("free send irq for res %d with handle 0x%X",
  1120. i, pr->eq->attr.ist1);
  1121. }
  1122. /* associated events */
  1123. ibmebus_free_irq(port->qp_eq->attr.ist1, port);
  1124. if (netif_msg_intr(port))
  1125. ehea_info("associated event interrupt for handle 0x%X freed",
  1126. port->qp_eq->attr.ist1);
  1127. }
  1128. static int ehea_configure_port(struct ehea_port *port)
  1129. {
  1130. int ret, i;
  1131. u64 hret, mask;
  1132. struct hcp_ehea_port_cb0 *cb0;
  1133. ret = -ENOMEM;
  1134. cb0 = (void *)get_zeroed_page(GFP_KERNEL);
  1135. if (!cb0)
  1136. goto out;
  1137. cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
  1138. | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
  1139. | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
  1140. | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
  1141. | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
  1142. PXLY_RC_VLAN_FILTER)
  1143. | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
  1144. for (i = 0; i < port->num_mcs; i++)
  1145. if (use_mcs)
  1146. cb0->default_qpn_arr[i] =
  1147. port->port_res[i].qp->init_attr.qp_nr;
  1148. else
  1149. cb0->default_qpn_arr[i] =
  1150. port->port_res[0].qp->init_attr.qp_nr;
  1151. if (netif_msg_ifup(port))
  1152. ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
  1153. mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
  1154. | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
  1155. hret = ehea_h_modify_ehea_port(port->adapter->handle,
  1156. port->logical_port_id,
  1157. H_PORT_CB0, mask, cb0);
  1158. ret = -EIO;
  1159. if (hret != H_SUCCESS)
  1160. goto out_free;
  1161. ret = 0;
  1162. out_free:
  1163. free_page((unsigned long)cb0);
  1164. out:
  1165. return ret;
  1166. }
  1167. int ehea_gen_smrs(struct ehea_port_res *pr)
  1168. {
  1169. int ret;
  1170. struct ehea_adapter *adapter = pr->port->adapter;
  1171. ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
  1172. if (ret)
  1173. goto out;
  1174. ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
  1175. if (ret)
  1176. goto out_free;
  1177. return 0;
  1178. out_free:
  1179. ehea_rem_mr(&pr->send_mr);
  1180. out:
  1181. ehea_error("Generating SMRS failed\n");
  1182. return -EIO;
  1183. }
  1184. int ehea_rem_smrs(struct ehea_port_res *pr)
  1185. {
  1186. if ((ehea_rem_mr(&pr->send_mr)) ||
  1187. (ehea_rem_mr(&pr->recv_mr)))
  1188. return -EIO;
  1189. else
  1190. return 0;
  1191. }
  1192. static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
  1193. {
  1194. int arr_size = sizeof(void *) * max_q_entries;
  1195. q_skba->arr = vmalloc(arr_size);
  1196. if (!q_skba->arr)
  1197. return -ENOMEM;
  1198. memset(q_skba->arr, 0, arr_size);
  1199. q_skba->len = max_q_entries;
  1200. q_skba->index = 0;
  1201. q_skba->os_skbs = 0;
  1202. return 0;
  1203. }
  1204. static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
  1205. struct port_res_cfg *pr_cfg, int queue_token)
  1206. {
  1207. struct ehea_adapter *adapter = port->adapter;
  1208. enum ehea_eq_type eq_type = EHEA_EQ;
  1209. struct ehea_qp_init_attr *init_attr = NULL;
  1210. int ret = -EIO;
  1211. memset(pr, 0, sizeof(struct ehea_port_res));
  1212. pr->port = port;
  1213. spin_lock_init(&pr->xmit_lock);
  1214. spin_lock_init(&pr->netif_queue);
  1215. pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
  1216. if (!pr->eq) {
  1217. ehea_error("create_eq failed (eq)");
  1218. goto out_free;
  1219. }
  1220. pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
  1221. pr->eq->fw_handle,
  1222. port->logical_port_id);
  1223. if (!pr->recv_cq) {
  1224. ehea_error("create_cq failed (cq_recv)");
  1225. goto out_free;
  1226. }
  1227. pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
  1228. pr->eq->fw_handle,
  1229. port->logical_port_id);
  1230. if (!pr->send_cq) {
  1231. ehea_error("create_cq failed (cq_send)");
  1232. goto out_free;
  1233. }
  1234. if (netif_msg_ifup(port))
  1235. ehea_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d",
  1236. pr->send_cq->attr.act_nr_of_cqes,
  1237. pr->recv_cq->attr.act_nr_of_cqes);
  1238. init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
  1239. if (!init_attr) {
  1240. ret = -ENOMEM;
  1241. ehea_error("no mem for ehea_qp_init_attr");
  1242. goto out_free;
  1243. }
  1244. init_attr->low_lat_rq1 = 1;
  1245. init_attr->signalingtype = 1; /* generate CQE if specified in WQE */
  1246. init_attr->rq_count = 3;
  1247. init_attr->qp_token = queue_token;
  1248. init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
  1249. init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
  1250. init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
  1251. init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
  1252. init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
  1253. init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
  1254. init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
  1255. init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
  1256. init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
  1257. init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
  1258. init_attr->port_nr = port->logical_port_id;
  1259. init_attr->send_cq_handle = pr->send_cq->fw_handle;
  1260. init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
  1261. init_attr->aff_eq_handle = port->qp_eq->fw_handle;
  1262. pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
  1263. if (!pr->qp) {
  1264. ehea_error("create_qp failed");
  1265. ret = -EIO;
  1266. goto out_free;
  1267. }
  1268. if (netif_msg_ifup(port))
  1269. ehea_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n "
  1270. "nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d", init_attr->qp_nr,
  1271. init_attr->act_nr_send_wqes,
  1272. init_attr->act_nr_rwqes_rq1,
  1273. init_attr->act_nr_rwqes_rq2,
  1274. init_attr->act_nr_rwqes_rq3);
  1275. pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
  1276. ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
  1277. ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
  1278. ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
  1279. ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
  1280. if (ret)
  1281. goto out_free;
  1282. pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
  1283. if (ehea_gen_smrs(pr) != 0) {
  1284. ret = -EIO;
  1285. goto out_free;
  1286. }
  1287. atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
  1288. kfree(init_attr);
  1289. netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
  1290. pr->lro_mgr.max_aggr = pr->port->lro_max_aggr;
  1291. pr->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS;
  1292. pr->lro_mgr.lro_arr = pr->lro_desc;
  1293. pr->lro_mgr.get_skb_header = get_skb_hdr;
  1294. pr->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
  1295. pr->lro_mgr.dev = port->netdev;
  1296. pr->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
  1297. pr->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
  1298. ret = 0;
  1299. goto out;
  1300. out_free:
  1301. kfree(init_attr);
  1302. vfree(pr->sq_skba.arr);
  1303. vfree(pr->rq1_skba.arr);
  1304. vfree(pr->rq2_skba.arr);
  1305. vfree(pr->rq3_skba.arr);
  1306. ehea_destroy_qp(pr->qp);
  1307. ehea_destroy_cq(pr->send_cq);
  1308. ehea_destroy_cq(pr->recv_cq);
  1309. ehea_destroy_eq(pr->eq);
  1310. out:
  1311. return ret;
  1312. }
  1313. static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
  1314. {
  1315. int ret, i;
  1316. if (pr->qp)
  1317. netif_napi_del(&pr->napi);
  1318. ret = ehea_destroy_qp(pr->qp);
  1319. if (!ret) {
  1320. ehea_destroy_cq(pr->send_cq);
  1321. ehea_destroy_cq(pr->recv_cq);
  1322. ehea_destroy_eq(pr->eq);
  1323. for (i = 0; i < pr->rq1_skba.len; i++)
  1324. if (pr->rq1_skba.arr[i])
  1325. dev_kfree_skb(pr->rq1_skba.arr[i]);
  1326. for (i = 0; i < pr->rq2_skba.len; i++)
  1327. if (pr->rq2_skba.arr[i])
  1328. dev_kfree_skb(pr->rq2_skba.arr[i]);
  1329. for (i = 0; i < pr->rq3_skba.len; i++)
  1330. if (pr->rq3_skba.arr[i])
  1331. dev_kfree_skb(pr->rq3_skba.arr[i]);
  1332. for (i = 0; i < pr->sq_skba.len; i++)
  1333. if (pr->sq_skba.arr[i])
  1334. dev_kfree_skb(pr->sq_skba.arr[i]);
  1335. vfree(pr->rq1_skba.arr);
  1336. vfree(pr->rq2_skba.arr);
  1337. vfree(pr->rq3_skba.arr);
  1338. vfree(pr->sq_skba.arr);
  1339. ret = ehea_rem_smrs(pr);
  1340. }
  1341. return ret;
  1342. }
  1343. /*
  1344. * The write_* functions store information in swqe which is used by
  1345. * the hardware to calculate the ip/tcp/udp checksum
  1346. */
  1347. static inline void write_ip_start_end(struct ehea_swqe *swqe,
  1348. const struct sk_buff *skb)
  1349. {
  1350. swqe->ip_start = skb_network_offset(skb);
  1351. swqe->ip_end = (u8)(swqe->ip_start + ip_hdrlen(skb) - 1);
  1352. }
  1353. static inline void write_tcp_offset_end(struct ehea_swqe *swqe,
  1354. const struct sk_buff *skb)
  1355. {
  1356. swqe->tcp_offset =
  1357. (u8)(swqe->ip_end + 1 + offsetof(struct tcphdr, check));
  1358. swqe->tcp_end = (u16)skb->len - 1;
  1359. }
  1360. static inline void write_udp_offset_end(struct ehea_swqe *swqe,
  1361. const struct sk_buff *skb)
  1362. {
  1363. swqe->tcp_offset =
  1364. (u8)(swqe->ip_end + 1 + offsetof(struct udphdr, check));
  1365. swqe->tcp_end = (u16)skb->len - 1;
  1366. }
  1367. static void write_swqe2_TSO(struct sk_buff *skb,
  1368. struct ehea_swqe *swqe, u32 lkey)
  1369. {
  1370. struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
  1371. u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
  1372. int skb_data_size = skb_headlen(skb);
  1373. int headersize;
  1374. /* Packet is TCP with TSO enabled */
  1375. swqe->tx_control |= EHEA_SWQE_TSO;
  1376. swqe->mss = skb_shinfo(skb)->gso_size;
  1377. /* copy only eth/ip/tcp headers to immediate data and
  1378. * the rest of skb->data to sg1entry
  1379. */
  1380. headersize = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
  1381. skb_data_size = skb_headlen(skb);
  1382. if (skb_data_size >= headersize) {
  1383. /* copy immediate data */
  1384. skb_copy_from_linear_data(skb, imm_data, headersize);
  1385. swqe->immediate_data_length = headersize;
  1386. if (skb_data_size > headersize) {
  1387. /* set sg1entry data */
  1388. sg1entry->l_key = lkey;
  1389. sg1entry->len = skb_data_size - headersize;
  1390. sg1entry->vaddr =
  1391. ehea_map_vaddr(skb->data + headersize);
  1392. swqe->descriptors++;
  1393. }
  1394. } else
  1395. ehea_error("cannot handle fragmented headers");
  1396. }
  1397. static void write_swqe2_nonTSO(struct sk_buff *skb,
  1398. struct ehea_swqe *swqe, u32 lkey)
  1399. {
  1400. int skb_data_size = skb_headlen(skb);
  1401. u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
  1402. struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
  1403. /* Packet is any nonTSO type
  1404. *
  1405. * Copy as much as possible skb->data to immediate data and
  1406. * the rest to sg1entry
  1407. */
  1408. if (skb_data_size >= SWQE2_MAX_IMM) {
  1409. /* copy immediate data */
  1410. skb_copy_from_linear_data(skb, imm_data, SWQE2_MAX_IMM);
  1411. swqe->immediate_data_length = SWQE2_MAX_IMM;
  1412. if (skb_data_size > SWQE2_MAX_IMM) {
  1413. /* copy sg1entry data */
  1414. sg1entry->l_key = lkey;
  1415. sg1entry->len = skb_data_size - SWQE2_MAX_IMM;
  1416. sg1entry->vaddr =
  1417. ehea_map_vaddr(skb->data + SWQE2_MAX_IMM);
  1418. swqe->descriptors++;
  1419. }
  1420. } else {
  1421. skb_copy_from_linear_data(skb, imm_data, skb_data_size);
  1422. swqe->immediate_data_length = skb_data_size;
  1423. }
  1424. }
  1425. static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
  1426. struct ehea_swqe *swqe, u32 lkey)
  1427. {
  1428. struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
  1429. skb_frag_t *frag;
  1430. int nfrags, sg1entry_contains_frag_data, i;
  1431. nfrags = skb_shinfo(skb)->nr_frags;
  1432. sg1entry = &swqe->u.immdata_desc.sg_entry;
  1433. sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
  1434. swqe->descriptors = 0;
  1435. sg1entry_contains_frag_data = 0;
  1436. if ((dev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size)
  1437. write_swqe2_TSO(skb, swqe, lkey);
  1438. else
  1439. write_swqe2_nonTSO(skb, swqe, lkey);
  1440. /* write descriptors */
  1441. if (nfrags > 0) {
  1442. if (swqe->descriptors == 0) {
  1443. /* sg1entry not yet used */
  1444. frag = &skb_shinfo(skb)->frags[0];
  1445. /* copy sg1entry data */
  1446. sg1entry->l_key = lkey;
  1447. sg1entry->len = frag->size;
  1448. sg1entry->vaddr =
  1449. ehea_map_vaddr(page_address(frag->page)
  1450. + frag->page_offset);
  1451. swqe->descriptors++;
  1452. sg1entry_contains_frag_data = 1;
  1453. }
  1454. for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
  1455. frag = &skb_shinfo(skb)->frags[i];
  1456. sgentry = &sg_list[i - sg1entry_contains_frag_data];
  1457. sgentry->l_key = lkey;
  1458. sgentry->len = frag->size;
  1459. sgentry->vaddr =
  1460. ehea_map_vaddr(page_address(frag->page)
  1461. + frag->page_offset);
  1462. swqe->descriptors++;
  1463. }
  1464. }
  1465. }
  1466. static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
  1467. {
  1468. int ret = 0;
  1469. u64 hret;
  1470. u8 reg_type;
  1471. /* De/Register untagged packets */
  1472. reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
  1473. hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
  1474. port->logical_port_id,
  1475. reg_type, port->mac_addr, 0, hcallid);
  1476. if (hret != H_SUCCESS) {
  1477. ehea_error("%sregistering bc address failed (tagged)",
  1478. hcallid == H_REG_BCMC ? "" : "de");
  1479. ret = -EIO;
  1480. goto out_herr;
  1481. }
  1482. /* De/Register VLAN packets */
  1483. reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
  1484. hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
  1485. port->logical_port_id,
  1486. reg_type, port->mac_addr, 0, hcallid);
  1487. if (hret != H_SUCCESS) {
  1488. ehea_error("%sregistering bc address failed (vlan)",
  1489. hcallid == H_REG_BCMC ? "" : "de");
  1490. ret = -EIO;
  1491. }
  1492. out_herr:
  1493. return ret;
  1494. }
  1495. static int ehea_set_mac_addr(struct net_device *dev, void *sa)
  1496. {
  1497. struct ehea_port *port = netdev_priv(dev);
  1498. struct sockaddr *mac_addr = sa;
  1499. struct hcp_ehea_port_cb0 *cb0;
  1500. int ret;
  1501. u64 hret;
  1502. if (!is_valid_ether_addr(mac_addr->sa_data)) {
  1503. ret = -EADDRNOTAVAIL;
  1504. goto out;
  1505. }
  1506. cb0 = (void *)get_zeroed_page(GFP_KERNEL);
  1507. if (!cb0) {
  1508. ehea_error("no mem for cb0");
  1509. ret = -ENOMEM;
  1510. goto out;
  1511. }
  1512. memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
  1513. cb0->port_mac_addr = cb0->port_mac_addr >> 16;
  1514. hret = ehea_h_modify_ehea_port(port->adapter->handle,
  1515. port->logical_port_id, H_PORT_CB0,
  1516. EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
  1517. if (hret != H_SUCCESS) {
  1518. ret = -EIO;
  1519. goto out_free;
  1520. }
  1521. memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
  1522. /* Deregister old MAC in pHYP */
  1523. if (port->state == EHEA_PORT_UP) {
  1524. ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
  1525. if (ret)
  1526. goto out_upregs;
  1527. }
  1528. port->mac_addr = cb0->port_mac_addr << 16;
  1529. /* Register new MAC in pHYP */
  1530. if (port->state == EHEA_PORT_UP) {
  1531. ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
  1532. if (ret)
  1533. goto out_upregs;
  1534. }
  1535. ret = 0;
  1536. out_upregs:
  1537. ehea_update_bcmc_registrations();
  1538. out_free:
  1539. free_page((unsigned long)cb0);
  1540. out:
  1541. return ret;
  1542. }
  1543. static void ehea_promiscuous_error(u64 hret, int enable)
  1544. {
  1545. if (hret == H_AUTHORITY)
  1546. ehea_info("Hypervisor denied %sabling promiscuous mode",
  1547. enable == 1 ? "en" : "dis");
  1548. else
  1549. ehea_error("failed %sabling promiscuous mode",
  1550. enable == 1 ? "en" : "dis");
  1551. }
  1552. static void ehea_promiscuous(struct net_device *dev, int enable)
  1553. {
  1554. struct ehea_port *port = netdev_priv(dev);
  1555. struct hcp_ehea_port_cb7 *cb7;
  1556. u64 hret;
  1557. if ((enable && port->promisc) || (!enable && !port->promisc))
  1558. return;
  1559. cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
  1560. if (!cb7) {
  1561. ehea_error("no mem for cb7");
  1562. goto out;
  1563. }
  1564. /* Modify Pxs_DUCQPN in CB7 */
  1565. cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
  1566. hret = ehea_h_modify_ehea_port(port->adapter->handle,
  1567. port->logical_port_id,
  1568. H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
  1569. if (hret) {
  1570. ehea_promiscuous_error(hret, enable);
  1571. goto out;
  1572. }
  1573. port->promisc = enable;
  1574. out:
  1575. free_page((unsigned long)cb7);
  1576. return;
  1577. }
  1578. static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
  1579. u32 hcallid)
  1580. {
  1581. u64 hret;
  1582. u8 reg_type;
  1583. reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
  1584. | EHEA_BCMC_UNTAGGED;
  1585. hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
  1586. port->logical_port_id,
  1587. reg_type, mc_mac_addr, 0, hcallid);
  1588. if (hret)
  1589. goto out;
  1590. reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
  1591. | EHEA_BCMC_VLANID_ALL;
  1592. hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
  1593. port->logical_port_id,
  1594. reg_type, mc_mac_addr, 0, hcallid);
  1595. out:
  1596. return hret;
  1597. }
  1598. static int ehea_drop_multicast_list(struct net_device *dev)
  1599. {
  1600. struct ehea_port *port = netdev_priv(dev);
  1601. struct ehea_mc_list *mc_entry = port->mc_list;
  1602. struct list_head *pos;
  1603. struct list_head *temp;
  1604. int ret = 0;
  1605. u64 hret;
  1606. list_for_each_safe(pos, temp, &(port->mc_list->list)) {
  1607. mc_entry = list_entry(pos, struct ehea_mc_list, list);
  1608. hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
  1609. H_DEREG_BCMC);
  1610. if (hret) {
  1611. ehea_error("failed deregistering mcast MAC");
  1612. ret = -EIO;
  1613. }
  1614. list_del(pos);
  1615. kfree(mc_entry);
  1616. }
  1617. return ret;
  1618. }
  1619. static void ehea_allmulti(struct net_device *dev, int enable)
  1620. {
  1621. struct ehea_port *port = netdev_priv(dev);
  1622. u64 hret;
  1623. if (!port->allmulti) {
  1624. if (enable) {
  1625. /* Enable ALLMULTI */
  1626. ehea_drop_multicast_list(dev);
  1627. hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
  1628. if (!hret)
  1629. port->allmulti = 1;
  1630. else
  1631. ehea_error("failed enabling IFF_ALLMULTI");
  1632. }
  1633. } else
  1634. if (!enable) {
  1635. /* Disable ALLMULTI */
  1636. hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
  1637. if (!hret)
  1638. port->allmulti = 0;
  1639. else
  1640. ehea_error("failed disabling IFF_ALLMULTI");
  1641. }
  1642. }
  1643. static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
  1644. {
  1645. struct ehea_mc_list *ehea_mcl_entry;
  1646. u64 hret;
  1647. ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
  1648. if (!ehea_mcl_entry) {
  1649. ehea_error("no mem for mcl_entry");
  1650. return;
  1651. }
  1652. INIT_LIST_HEAD(&ehea_mcl_entry->list);
  1653. memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
  1654. hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
  1655. H_REG_BCMC);
  1656. if (!hret)
  1657. list_add(&ehea_mcl_entry->list, &port->mc_list->list);
  1658. else {
  1659. ehea_error("failed registering mcast MAC");
  1660. kfree(ehea_mcl_entry);
  1661. }
  1662. }
  1663. static void ehea_set_multicast_list(struct net_device *dev)
  1664. {
  1665. struct ehea_port *port = netdev_priv(dev);
  1666. struct netdev_hw_addr *ha;
  1667. int ret;
  1668. if (dev->flags & IFF_PROMISC) {
  1669. ehea_promiscuous(dev, 1);
  1670. return;
  1671. }
  1672. ehea_promiscuous(dev, 0);
  1673. if (dev->flags & IFF_ALLMULTI) {
  1674. ehea_allmulti(dev, 1);
  1675. goto out;
  1676. }
  1677. ehea_allmulti(dev, 0);
  1678. if (!netdev_mc_empty(dev)) {
  1679. ret = ehea_drop_multicast_list(dev);
  1680. if (ret) {
  1681. /* Dropping the current multicast list failed.
  1682. * Enabling ALL_MULTI is the best we can do.
  1683. */
  1684. ehea_allmulti(dev, 1);
  1685. }
  1686. if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
  1687. ehea_info("Mcast registration limit reached (0x%llx). "
  1688. "Use ALLMULTI!",
  1689. port->adapter->max_mc_mac);
  1690. goto out;
  1691. }
  1692. netdev_for_each_mc_addr(ha, dev)
  1693. ehea_add_multicast_entry(port, ha->addr);
  1694. }
  1695. out:
  1696. ehea_update_bcmc_registrations();
  1697. return;
  1698. }
  1699. static int ehea_change_mtu(struct net_device *dev, int new_mtu)
  1700. {
  1701. if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
  1702. return -EINVAL;
  1703. dev->mtu = new_mtu;
  1704. return 0;
  1705. }
  1706. static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
  1707. struct ehea_swqe *swqe, u32 lkey)
  1708. {
  1709. if (skb->protocol == htons(ETH_P_IP)) {
  1710. const struct iphdr *iph = ip_hdr(skb);
  1711. /* IPv4 */
  1712. swqe->tx_control |= EHEA_SWQE_CRC
  1713. | EHEA_SWQE_IP_CHECKSUM
  1714. | EHEA_SWQE_TCP_CHECKSUM
  1715. | EHEA_SWQE_IMM_DATA_PRESENT
  1716. | EHEA_SWQE_DESCRIPTORS_PRESENT;
  1717. write_ip_start_end(swqe, skb);
  1718. if (iph->protocol == IPPROTO_UDP) {
  1719. if ((iph->frag_off & IP_MF) ||
  1720. (iph->frag_off & IP_OFFSET))
  1721. /* IP fragment, so don't change cs */
  1722. swqe->tx_control &= ~EHEA_SWQE_TCP_CHECKSUM;
  1723. else
  1724. write_udp_offset_end(swqe, skb);
  1725. } else if (iph->protocol == IPPROTO_TCP) {
  1726. write_tcp_offset_end(swqe, skb);
  1727. }
  1728. /* icmp (big data) and ip segmentation packets (all other ip
  1729. packets) do not require any special handling */
  1730. } else {
  1731. /* Other Ethernet Protocol */
  1732. swqe->tx_control |= EHEA_SWQE_CRC
  1733. | EHEA_SWQE_IMM_DATA_PRESENT
  1734. | EHEA_SWQE_DESCRIPTORS_PRESENT;
  1735. }
  1736. write_swqe2_data(skb, dev, swqe, lkey);
  1737. }
  1738. static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
  1739. struct ehea_swqe *swqe)
  1740. {
  1741. int nfrags = skb_shinfo(skb)->nr_frags;
  1742. u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
  1743. skb_frag_t *frag;
  1744. int i;
  1745. if (skb->protocol == htons(ETH_P_IP)) {
  1746. const struct iphdr *iph = ip_hdr(skb);
  1747. /* IPv4 */
  1748. write_ip_start_end(swqe, skb);
  1749. if (iph->protocol == IPPROTO_TCP) {
  1750. swqe->tx_control |= EHEA_SWQE_CRC
  1751. | EHEA_SWQE_IP_CHECKSUM
  1752. | EHEA_SWQE_TCP_CHECKSUM
  1753. | EHEA_SWQE_IMM_DATA_PRESENT;
  1754. write_tcp_offset_end(swqe, skb);
  1755. } else if (iph->protocol == IPPROTO_UDP) {
  1756. if ((iph->frag_off & IP_MF) ||
  1757. (iph->frag_off & IP_OFFSET))
  1758. /* IP fragment, so don't change cs */
  1759. swqe->tx_control |= EHEA_SWQE_CRC
  1760. | EHEA_SWQE_IMM_DATA_PRESENT;
  1761. else {
  1762. swqe->tx_control |= EHEA_SWQE_CRC
  1763. | EHEA_SWQE_IP_CHECKSUM
  1764. | EHEA_SWQE_TCP_CHECKSUM
  1765. | EHEA_SWQE_IMM_DATA_PRESENT;
  1766. write_udp_offset_end(swqe, skb);
  1767. }
  1768. } else {
  1769. /* icmp (big data) and
  1770. ip segmentation packets (all other ip packets) */
  1771. swqe->tx_control |= EHEA_SWQE_CRC
  1772. | EHEA_SWQE_IP_CHECKSUM
  1773. | EHEA_SWQE_IMM_DATA_PRESENT;
  1774. }
  1775. } else {
  1776. /* Other Ethernet Protocol */
  1777. swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IMM_DATA_PRESENT;
  1778. }
  1779. /* copy (immediate) data */
  1780. if (nfrags == 0) {
  1781. /* data is in a single piece */
  1782. skb_copy_from_linear_data(skb, imm_data, skb->len);
  1783. } else {
  1784. /* first copy data from the skb->data buffer ... */
  1785. skb_copy_from_linear_data(skb, imm_data,
  1786. skb_headlen(skb));
  1787. imm_data += skb_headlen(skb);
  1788. /* ... then copy data from the fragments */
  1789. for (i = 0; i < nfrags; i++) {
  1790. frag = &skb_shinfo(skb)->frags[i];
  1791. memcpy(imm_data,
  1792. page_address(frag->page) + frag->page_offset,
  1793. frag->size);
  1794. imm_data += frag->size;
  1795. }
  1796. }
  1797. swqe->immediate_data_length = skb->len;
  1798. dev_kfree_skb(skb);
  1799. }
  1800. static inline int ehea_hash_skb(struct sk_buff *skb, int num_qps)
  1801. {
  1802. struct tcphdr *tcp;
  1803. u32 tmp;
  1804. if ((skb->protocol == htons(ETH_P_IP)) &&
  1805. (ip_hdr(skb)->protocol == IPPROTO_TCP)) {
  1806. tcp = (struct tcphdr *)(skb_network_header(skb) +
  1807. (ip_hdr(skb)->ihl * 4));
  1808. tmp = (tcp->source + (tcp->dest << 16)) % 31;
  1809. tmp += ip_hdr(skb)->daddr % 31;
  1810. return tmp % num_qps;
  1811. } else
  1812. return 0;
  1813. }
  1814. static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
  1815. {
  1816. struct ehea_port *port = netdev_priv(dev);
  1817. struct ehea_swqe *swqe;
  1818. unsigned long flags;
  1819. u32 lkey;
  1820. int swqe_index;
  1821. struct ehea_port_res *pr;
  1822. pr = &port->port_res[ehea_hash_skb(skb, port->num_tx_qps)];
  1823. if (!spin_trylock(&pr->xmit_lock))
  1824. return NETDEV_TX_BUSY;
  1825. if (pr->queue_stopped) {
  1826. spin_unlock(&pr->xmit_lock);
  1827. return NETDEV_TX_BUSY;
  1828. }
  1829. swqe = ehea_get_swqe(pr->qp, &swqe_index);
  1830. memset(swqe, 0, SWQE_HEADER_SIZE);
  1831. atomic_dec(&pr->swqe_avail);
  1832. if (skb->len <= SWQE3_MAX_IMM) {
  1833. u32 sig_iv = port->sig_comp_iv;
  1834. u32 swqe_num = pr->swqe_id_counter;
  1835. ehea_xmit3(skb, dev, swqe);
  1836. swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
  1837. | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
  1838. if (pr->swqe_ll_count >= (sig_iv - 1)) {
  1839. swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
  1840. sig_iv);
  1841. swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
  1842. pr->swqe_ll_count = 0;
  1843. } else
  1844. pr->swqe_ll_count += 1;
  1845. } else {
  1846. swqe->wr_id =
  1847. EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
  1848. | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
  1849. | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
  1850. | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
  1851. pr->sq_skba.arr[pr->sq_skba.index] = skb;
  1852. pr->sq_skba.index++;
  1853. pr->sq_skba.index &= (pr->sq_skba.len - 1);
  1854. lkey = pr->send_mr.lkey;
  1855. ehea_xmit2(skb, dev, swqe, lkey);
  1856. swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
  1857. }
  1858. pr->swqe_id_counter += 1;
  1859. if (port->vgrp && vlan_tx_tag_present(skb)) {
  1860. swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
  1861. swqe->vlan_tag = vlan_tx_tag_get(skb);
  1862. }
  1863. if (netif_msg_tx_queued(port)) {
  1864. ehea_info("post swqe on QP %d", pr->qp->init_attr.qp_nr);
  1865. ehea_dump(swqe, 512, "swqe");
  1866. }
  1867. if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
  1868. netif_stop_queue(dev);
  1869. swqe->tx_control |= EHEA_SWQE_PURGE;
  1870. }
  1871. ehea_post_swqe(pr->qp, swqe);
  1872. pr->tx_packets++;
  1873. if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
  1874. spin_lock_irqsave(&pr->netif_queue, flags);
  1875. if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
  1876. pr->p_stats.queue_stopped++;
  1877. netif_stop_queue(dev);
  1878. pr->queue_stopped = 1;
  1879. }
  1880. spin_unlock_irqrestore(&pr->netif_queue, flags);
  1881. }
  1882. dev->trans_start = jiffies;
  1883. spin_unlock(&pr->xmit_lock);
  1884. return NETDEV_TX_OK;
  1885. }
  1886. static void ehea_vlan_rx_register(struct net_device *dev,
  1887. struct vlan_group *grp)
  1888. {
  1889. struct ehea_port *port = netdev_priv(dev);
  1890. struct ehea_adapter *adapter = port->adapter;
  1891. struct hcp_ehea_port_cb1 *cb1;
  1892. u64 hret;
  1893. port->vgrp = grp;
  1894. cb1 = (void *)get_zeroed_page(GFP_KERNEL);
  1895. if (!cb1) {
  1896. ehea_error("no mem for cb1");
  1897. goto out;
  1898. }
  1899. hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
  1900. H_PORT_CB1, H_PORT_CB1_ALL, cb1);
  1901. if (hret != H_SUCCESS)
  1902. ehea_error("modify_ehea_port failed");
  1903. free_page((unsigned long)cb1);
  1904. out:
  1905. return;
  1906. }
  1907. static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
  1908. {
  1909. struct ehea_port *port = netdev_priv(dev);
  1910. struct ehea_adapter *adapter = port->adapter;
  1911. struct hcp_ehea_port_cb1 *cb1;
  1912. int index;
  1913. u64 hret;
  1914. cb1 = (void *)get_zeroed_page(GFP_KERNEL);
  1915. if (!cb1) {
  1916. ehea_error("no mem for cb1");
  1917. goto out;
  1918. }
  1919. hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
  1920. H_PORT_CB1, H_PORT_CB1_ALL, cb1);
  1921. if (hret != H_SUCCESS) {
  1922. ehea_error("query_ehea_port failed");
  1923. goto out;
  1924. }
  1925. index = (vid / 64);
  1926. cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
  1927. hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
  1928. H_PORT_CB1, H_PORT_CB1_ALL, cb1);
  1929. if (hret != H_SUCCESS)
  1930. ehea_error("modify_ehea_port failed");
  1931. out:
  1932. free_page((unsigned long)cb1);
  1933. return;
  1934. }
  1935. static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
  1936. {
  1937. struct ehea_port *port = netdev_priv(dev);
  1938. struct ehea_adapter *adapter = port->adapter;
  1939. struct hcp_ehea_port_cb1 *cb1;
  1940. int index;
  1941. u64 hret;
  1942. vlan_group_set_device(port->vgrp, vid, NULL);
  1943. cb1 = (void *)get_zeroed_page(GFP_KERNEL);
  1944. if (!cb1) {
  1945. ehea_error("no mem for cb1");
  1946. goto out;
  1947. }
  1948. hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
  1949. H_PORT_CB1, H_PORT_CB1_ALL, cb1);
  1950. if (hret != H_SUCCESS) {
  1951. ehea_error("query_ehea_port failed");
  1952. goto out;
  1953. }
  1954. index = (vid / 64);
  1955. cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
  1956. hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
  1957. H_PORT_CB1, H_PORT_CB1_ALL, cb1);
  1958. if (hret != H_SUCCESS)
  1959. ehea_error("modify_ehea_port failed");
  1960. out:
  1961. free_page((unsigned long)cb1);
  1962. return;
  1963. }
  1964. int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
  1965. {
  1966. int ret = -EIO;
  1967. u64 hret;
  1968. u16 dummy16 = 0;
  1969. u64 dummy64 = 0;
  1970. struct hcp_modify_qp_cb0 *cb0;
  1971. cb0 = (void *)get_zeroed_page(GFP_KERNEL);
  1972. if (!cb0) {
  1973. ret = -ENOMEM;
  1974. goto out;
  1975. }
  1976. hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
  1977. EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
  1978. if (hret != H_SUCCESS) {
  1979. ehea_error("query_ehea_qp failed (1)");
  1980. goto out;
  1981. }
  1982. cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
  1983. hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
  1984. EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
  1985. &dummy64, &dummy64, &dummy16, &dummy16);
  1986. if (hret != H_SUCCESS) {
  1987. ehea_error("modify_ehea_qp failed (1)");
  1988. goto out;
  1989. }
  1990. hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
  1991. EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
  1992. if (hret != H_SUCCESS) {
  1993. ehea_error("query_ehea_qp failed (2)");
  1994. goto out;
  1995. }
  1996. cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
  1997. hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
  1998. EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
  1999. &dummy64, &dummy64, &dummy16, &dummy16);
  2000. if (hret != H_SUCCESS) {
  2001. ehea_error("modify_ehea_qp failed (2)");
  2002. goto out;
  2003. }
  2004. hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
  2005. EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
  2006. if (hret != H_SUCCESS) {
  2007. ehea_error("query_ehea_qp failed (3)");
  2008. goto out;
  2009. }
  2010. cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
  2011. hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
  2012. EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
  2013. &dummy64, &dummy64, &dummy16, &dummy16);
  2014. if (hret != H_SUCCESS) {
  2015. ehea_error("modify_ehea_qp failed (3)");
  2016. goto out;
  2017. }
  2018. hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
  2019. EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
  2020. if (hret != H_SUCCESS) {
  2021. ehea_error("query_ehea_qp failed (4)");
  2022. goto out;
  2023. }
  2024. ret = 0;
  2025. out:
  2026. free_page((unsigned long)cb0);
  2027. return ret;
  2028. }
  2029. static int ehea_port_res_setup(struct ehea_port *port, int def_qps,
  2030. int add_tx_qps)
  2031. {
  2032. int ret, i;
  2033. struct port_res_cfg pr_cfg, pr_cfg_small_rx;
  2034. enum ehea_eq_type eq_type = EHEA_EQ;
  2035. port->qp_eq = ehea_create_eq(port->adapter, eq_type,
  2036. EHEA_MAX_ENTRIES_EQ, 1);
  2037. if (!port->qp_eq) {
  2038. ret = -EINVAL;
  2039. ehea_error("ehea_create_eq failed (qp_eq)");
  2040. goto out_kill_eq;
  2041. }
  2042. pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
  2043. pr_cfg.max_entries_scq = sq_entries * 2;
  2044. pr_cfg.max_entries_sq = sq_entries;
  2045. pr_cfg.max_entries_rq1 = rq1_entries;
  2046. pr_cfg.max_entries_rq2 = rq2_entries;
  2047. pr_cfg.max_entries_rq3 = rq3_entries;
  2048. pr_cfg_small_rx.max_entries_rcq = 1;
  2049. pr_cfg_small_rx.max_entries_scq = sq_entries;
  2050. pr_cfg_small_rx.max_entries_sq = sq_entries;
  2051. pr_cfg_small_rx.max_entries_rq1 = 1;
  2052. pr_cfg_small_rx.max_entries_rq2 = 1;
  2053. pr_cfg_small_rx.max_entries_rq3 = 1;
  2054. for (i = 0; i < def_qps; i++) {
  2055. ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
  2056. if (ret)
  2057. goto out_clean_pr;
  2058. }
  2059. for (i = def_qps; i < def_qps + add_tx_qps; i++) {
  2060. ret = ehea_init_port_res(port, &port->port_res[i],
  2061. &pr_cfg_small_rx, i);
  2062. if (ret)
  2063. goto out_clean_pr;
  2064. }
  2065. return 0;
  2066. out_clean_pr:
  2067. while (--i >= 0)
  2068. ehea_clean_portres(port, &port->port_res[i]);
  2069. out_kill_eq:
  2070. ehea_destroy_eq(port->qp_eq);
  2071. return ret;
  2072. }
  2073. static int ehea_clean_all_portres(struct ehea_port *port)
  2074. {
  2075. int ret = 0;
  2076. int i;
  2077. for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
  2078. ret |= ehea_clean_portres(port, &port->port_res[i]);
  2079. ret |= ehea_destroy_eq(port->qp_eq);
  2080. return ret;
  2081. }
  2082. static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
  2083. {
  2084. if (adapter->active_ports)
  2085. return;
  2086. ehea_rem_mr(&adapter->mr);
  2087. }
  2088. static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
  2089. {
  2090. if (adapter->active_ports)
  2091. return 0;
  2092. return ehea_reg_kernel_mr(adapter, &adapter->mr);
  2093. }
  2094. static int ehea_up(struct net_device *dev)
  2095. {
  2096. int ret, i;
  2097. struct ehea_port *port = netdev_priv(dev);
  2098. if (port->state == EHEA_PORT_UP)
  2099. return 0;
  2100. ret = ehea_port_res_setup(port, port->num_def_qps,
  2101. port->num_add_tx_qps);
  2102. if (ret) {
  2103. ehea_error("port_res_failed");
  2104. goto out;
  2105. }
  2106. /* Set default QP for this port */
  2107. ret = ehea_configure_port(port);
  2108. if (ret) {
  2109. ehea_error("ehea_configure_port failed. ret:%d", ret);
  2110. goto out_clean_pr;
  2111. }
  2112. ret = ehea_reg_interrupts(dev);
  2113. if (ret) {
  2114. ehea_error("reg_interrupts failed. ret:%d", ret);
  2115. goto out_clean_pr;
  2116. }
  2117. for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
  2118. ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
  2119. if (ret) {
  2120. ehea_error("activate_qp failed");
  2121. goto out_free_irqs;
  2122. }
  2123. }
  2124. for (i = 0; i < port->num_def_qps; i++) {
  2125. ret = ehea_fill_port_res(&port->port_res[i]);
  2126. if (ret) {
  2127. ehea_error("out_free_irqs");
  2128. goto out_free_irqs;
  2129. }
  2130. }
  2131. ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
  2132. if (ret) {
  2133. ret = -EIO;
  2134. goto out_free_irqs;
  2135. }
  2136. port->state = EHEA_PORT_UP;
  2137. ret = 0;
  2138. goto out;
  2139. out_free_irqs:
  2140. ehea_free_interrupts(dev);
  2141. out_clean_pr:
  2142. ehea_clean_all_portres(port);
  2143. out:
  2144. if (ret)
  2145. ehea_info("Failed starting %s. ret=%i", dev->name, ret);
  2146. ehea_update_bcmc_registrations();
  2147. ehea_update_firmware_handles();
  2148. return ret;
  2149. }
  2150. static void port_napi_disable(struct ehea_port *port)
  2151. {
  2152. int i;
  2153. for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
  2154. napi_disable(&port->port_res[i].napi);
  2155. }
  2156. static void port_napi_enable(struct ehea_port *port)
  2157. {
  2158. int i;
  2159. for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
  2160. napi_enable(&port->port_res[i].napi);
  2161. }
  2162. static int ehea_open(struct net_device *dev)
  2163. {
  2164. int ret;
  2165. struct ehea_port *port = netdev_priv(dev);
  2166. mutex_lock(&port->port_lock);
  2167. if (netif_msg_ifup(port))
  2168. ehea_info("enabling port %s", dev->name);
  2169. ret = ehea_up(dev);
  2170. if (!ret) {
  2171. port_napi_enable(port);
  2172. netif_start_queue(dev);
  2173. }
  2174. mutex_unlock(&port->port_lock);
  2175. return ret;
  2176. }
  2177. static int ehea_down(struct net_device *dev)
  2178. {
  2179. int ret;
  2180. struct ehea_port *port = netdev_priv(dev);
  2181. if (port->state == EHEA_PORT_DOWN)
  2182. return 0;
  2183. ehea_drop_multicast_list(dev);
  2184. ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
  2185. ehea_free_interrupts(dev);
  2186. port->state = EHEA_PORT_DOWN;
  2187. ehea_update_bcmc_registrations();
  2188. ret = ehea_clean_all_portres(port);
  2189. if (ret)
  2190. ehea_info("Failed freeing resources for %s. ret=%i",
  2191. dev->name, ret);
  2192. ehea_update_firmware_handles();
  2193. return ret;
  2194. }
  2195. static int ehea_stop(struct net_device *dev)
  2196. {
  2197. int ret;
  2198. struct ehea_port *port = netdev_priv(dev);
  2199. if (netif_msg_ifdown(port))
  2200. ehea_info("disabling port %s", dev->name);
  2201. set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
  2202. cancel_work_sync(&port->reset_task);
  2203. mutex_lock(&port->port_lock);
  2204. netif_stop_queue(dev);
  2205. port_napi_disable(port);
  2206. ret = ehea_down(dev);
  2207. mutex_unlock(&port->port_lock);
  2208. clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
  2209. return ret;
  2210. }
  2211. static void ehea_purge_sq(struct ehea_qp *orig_qp)
  2212. {
  2213. struct ehea_qp qp = *orig_qp;
  2214. struct ehea_qp_init_attr *init_attr = &qp.init_attr;
  2215. struct ehea_swqe *swqe;
  2216. int wqe_index;
  2217. int i;
  2218. for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
  2219. swqe = ehea_get_swqe(&qp, &wqe_index);
  2220. swqe->tx_control |= EHEA_SWQE_PURGE;
  2221. }
  2222. }
  2223. static void ehea_flush_sq(struct ehea_port *port)
  2224. {
  2225. int i;
  2226. for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
  2227. struct ehea_port_res *pr = &port->port_res[i];
  2228. int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
  2229. int k = 0;
  2230. while (atomic_read(&pr->swqe_avail) < swqe_max) {
  2231. msleep(5);
  2232. if (++k == 20)
  2233. break;
  2234. }
  2235. }
  2236. }
  2237. int ehea_stop_qps(struct net_device *dev)
  2238. {
  2239. struct ehea_port *port = netdev_priv(dev);
  2240. struct ehea_adapter *adapter = port->adapter;
  2241. struct hcp_modify_qp_cb0 *cb0;
  2242. int ret = -EIO;
  2243. int dret;
  2244. int i;
  2245. u64 hret;
  2246. u64 dummy64 = 0;
  2247. u16 dummy16 = 0;
  2248. cb0 = (void *)get_zeroed_page(GFP_KERNEL);
  2249. if (!cb0) {
  2250. ret = -ENOMEM;
  2251. goto out;
  2252. }
  2253. for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
  2254. struct ehea_port_res *pr = &port->port_res[i];
  2255. struct ehea_qp *qp = pr->qp;
  2256. /* Purge send queue */
  2257. ehea_purge_sq(qp);
  2258. /* Disable queue pair */
  2259. hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
  2260. EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
  2261. cb0);
  2262. if (hret != H_SUCCESS) {
  2263. ehea_error("query_ehea_qp failed (1)");
  2264. goto out;
  2265. }
  2266. cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
  2267. cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
  2268. hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
  2269. EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
  2270. 1), cb0, &dummy64,
  2271. &dummy64, &dummy16, &dummy16);
  2272. if (hret != H_SUCCESS) {
  2273. ehea_error("modify_ehea_qp failed (1)");
  2274. goto out;
  2275. }
  2276. hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
  2277. EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
  2278. cb0);
  2279. if (hret != H_SUCCESS) {
  2280. ehea_error("query_ehea_qp failed (2)");
  2281. goto out;
  2282. }
  2283. /* deregister shared memory regions */
  2284. dret = ehea_rem_smrs(pr);
  2285. if (dret) {
  2286. ehea_error("unreg shared memory region failed");
  2287. goto out;
  2288. }
  2289. }
  2290. ret = 0;
  2291. out:
  2292. free_page((unsigned long)cb0);
  2293. return ret;
  2294. }
  2295. void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
  2296. {
  2297. struct ehea_qp qp = *orig_qp;
  2298. struct ehea_qp_init_attr *init_attr = &qp.init_attr;
  2299. struct ehea_rwqe *rwqe;
  2300. struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
  2301. struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
  2302. struct sk_buff *skb;
  2303. u32 lkey = pr->recv_mr.lkey;
  2304. int i;
  2305. int index;
  2306. for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
  2307. rwqe = ehea_get_next_rwqe(&qp, 2);
  2308. rwqe->sg_list[0].l_key = lkey;
  2309. index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
  2310. skb = skba_rq2[index];
  2311. if (skb)
  2312. rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
  2313. }
  2314. for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
  2315. rwqe = ehea_get_next_rwqe(&qp, 3);
  2316. rwqe->sg_list[0].l_key = lkey;
  2317. index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
  2318. skb = skba_rq3[index];
  2319. if (skb)
  2320. rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
  2321. }
  2322. }
  2323. int ehea_restart_qps(struct net_device *dev)
  2324. {
  2325. struct ehea_port *port = netdev_priv(dev);
  2326. struct ehea_adapter *adapter = port->adapter;
  2327. int ret = 0;
  2328. int i;
  2329. struct hcp_modify_qp_cb0 *cb0;
  2330. u64 hret;
  2331. u64 dummy64 = 0;
  2332. u16 dummy16 = 0;
  2333. cb0 = (void *)get_zeroed_page(GFP_KERNEL);
  2334. if (!cb0) {
  2335. ret = -ENOMEM;
  2336. goto out;
  2337. }
  2338. for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
  2339. struct ehea_port_res *pr = &port->port_res[i];
  2340. struct ehea_qp *qp = pr->qp;
  2341. ret = ehea_gen_smrs(pr);
  2342. if (ret) {
  2343. ehea_error("creation of shared memory regions failed");
  2344. goto out;
  2345. }
  2346. ehea_update_rqs(qp, pr);
  2347. /* Enable queue pair */
  2348. hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
  2349. EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
  2350. cb0);
  2351. if (hret != H_SUCCESS) {
  2352. ehea_error("query_ehea_qp failed (1)");
  2353. goto out;
  2354. }
  2355. cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
  2356. cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
  2357. hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
  2358. EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
  2359. 1), cb0, &dummy64,
  2360. &dummy64, &dummy16, &dummy16);
  2361. if (hret != H_SUCCESS) {
  2362. ehea_error("modify_ehea_qp failed (1)");
  2363. goto out;
  2364. }
  2365. hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
  2366. EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
  2367. cb0);
  2368. if (hret != H_SUCCESS) {
  2369. ehea_error("query_ehea_qp failed (2)");
  2370. goto out;
  2371. }
  2372. /* refill entire queue */
  2373. ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
  2374. ehea_refill_rq2(pr, 0);
  2375. ehea_refill_rq3(pr, 0);
  2376. }
  2377. out:
  2378. free_page((unsigned long)cb0);
  2379. return ret;
  2380. }
  2381. static void ehea_reset_port(struct work_struct *work)
  2382. {
  2383. int ret;
  2384. struct ehea_port *port =
  2385. container_of(work, struct ehea_port, reset_task);
  2386. struct net_device *dev = port->netdev;
  2387. port->resets++;
  2388. mutex_lock(&port->port_lock);
  2389. netif_stop_queue(dev);
  2390. port_napi_disable(port);
  2391. ehea_down(dev);
  2392. ret = ehea_up(dev);
  2393. if (ret)
  2394. goto out;
  2395. ehea_set_multicast_list(dev);
  2396. if (netif_msg_timer(port))
  2397. ehea_info("Device %s resetted successfully", dev->name);
  2398. port_napi_enable(port);
  2399. netif_wake_queue(dev);
  2400. out:
  2401. mutex_unlock(&port->port_lock);
  2402. return;
  2403. }
  2404. static void ehea_rereg_mrs(struct work_struct *work)
  2405. {
  2406. int ret, i;
  2407. struct ehea_adapter *adapter;
  2408. ehea_info("LPAR memory changed - re-initializing driver");
  2409. list_for_each_entry(adapter, &adapter_list, list)
  2410. if (adapter->active_ports) {
  2411. /* Shutdown all ports */
  2412. for (i = 0; i < EHEA_MAX_PORTS; i++) {
  2413. struct ehea_port *port = adapter->port[i];
  2414. struct net_device *dev;
  2415. if (!port)
  2416. continue;
  2417. dev = port->netdev;
  2418. if (dev->flags & IFF_UP) {
  2419. mutex_lock(&port->port_lock);
  2420. netif_stop_queue(dev);
  2421. ehea_flush_sq(port);
  2422. ret = ehea_stop_qps(dev);
  2423. if (ret) {
  2424. mutex_unlock(&port->port_lock);
  2425. goto out;
  2426. }
  2427. port_napi_disable(port);
  2428. mutex_unlock(&port->port_lock);
  2429. }
  2430. }
  2431. /* Unregister old memory region */
  2432. ret = ehea_rem_mr(&adapter->mr);
  2433. if (ret) {
  2434. ehea_error("unregister MR failed - driver"
  2435. " inoperable!");
  2436. goto out;
  2437. }
  2438. }
  2439. clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
  2440. list_for_each_entry(adapter, &adapter_list, list)
  2441. if (adapter->active_ports) {
  2442. /* Register new memory region */
  2443. ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
  2444. if (ret) {
  2445. ehea_error("register MR failed - driver"
  2446. " inoperable!");
  2447. goto out;
  2448. }
  2449. /* Restart all ports */
  2450. for (i = 0; i < EHEA_MAX_PORTS; i++) {
  2451. struct ehea_port *port = adapter->port[i];
  2452. if (port) {
  2453. struct net_device *dev = port->netdev;
  2454. if (dev->flags & IFF_UP) {
  2455. mutex_lock(&port->port_lock);
  2456. port_napi_enable(port);
  2457. ret = ehea_restart_qps(dev);
  2458. if (!ret)
  2459. netif_wake_queue(dev);
  2460. mutex_unlock(&port->port_lock);
  2461. }
  2462. }
  2463. }
  2464. }
  2465. ehea_info("re-initializing driver complete");
  2466. out:
  2467. return;
  2468. }
  2469. static void ehea_tx_watchdog(struct net_device *dev)
  2470. {
  2471. struct ehea_port *port = netdev_priv(dev);
  2472. if (netif_carrier_ok(dev) &&
  2473. !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
  2474. ehea_schedule_port_reset(port);
  2475. }
  2476. int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
  2477. {
  2478. struct hcp_query_ehea *cb;
  2479. u64 hret;
  2480. int ret;
  2481. cb = (void *)get_zeroed_page(GFP_KERNEL);
  2482. if (!cb) {
  2483. ret = -ENOMEM;
  2484. goto out;
  2485. }
  2486. hret = ehea_h_query_ehea(adapter->handle, cb);
  2487. if (hret != H_SUCCESS) {
  2488. ret = -EIO;
  2489. goto out_herr;
  2490. }
  2491. adapter->max_mc_mac = cb->max_mc_mac - 1;
  2492. ret = 0;
  2493. out_herr:
  2494. free_page((unsigned long)cb);
  2495. out:
  2496. return ret;
  2497. }
  2498. int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
  2499. {
  2500. struct hcp_ehea_port_cb4 *cb4;
  2501. u64 hret;
  2502. int ret = 0;
  2503. *jumbo = 0;
  2504. /* (Try to) enable *jumbo frames */
  2505. cb4 = (void *)get_zeroed_page(GFP_KERNEL);
  2506. if (!cb4) {
  2507. ehea_error("no mem for cb4");
  2508. ret = -ENOMEM;
  2509. goto out;
  2510. } else {
  2511. hret = ehea_h_query_ehea_port(port->adapter->handle,
  2512. port->logical_port_id,
  2513. H_PORT_CB4,
  2514. H_PORT_CB4_JUMBO, cb4);
  2515. if (hret == H_SUCCESS) {
  2516. if (cb4->jumbo_frame)
  2517. *jumbo = 1;
  2518. else {
  2519. cb4->jumbo_frame = 1;
  2520. hret = ehea_h_modify_ehea_port(port->adapter->
  2521. handle,
  2522. port->
  2523. logical_port_id,
  2524. H_PORT_CB4,
  2525. H_PORT_CB4_JUMBO,
  2526. cb4);
  2527. if (hret == H_SUCCESS)
  2528. *jumbo = 1;
  2529. }
  2530. } else
  2531. ret = -EINVAL;
  2532. free_page((unsigned long)cb4);
  2533. }
  2534. out:
  2535. return ret;
  2536. }
  2537. static ssize_t ehea_show_port_id(struct device *dev,
  2538. struct device_attribute *attr, char *buf)
  2539. {
  2540. struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
  2541. return sprintf(buf, "%d", port->logical_port_id);
  2542. }
  2543. static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
  2544. NULL);
  2545. static void __devinit logical_port_release(struct device *dev)
  2546. {
  2547. struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
  2548. of_node_put(port->ofdev.node);
  2549. }
  2550. static struct device *ehea_register_port(struct ehea_port *port,
  2551. struct device_node *dn)
  2552. {
  2553. int ret;
  2554. port->ofdev.node = of_node_get(dn);
  2555. port->ofdev.dev.parent = &port->adapter->ofdev->dev;
  2556. port->ofdev.dev.bus = &ibmebus_bus_type;
  2557. dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
  2558. port->ofdev.dev.release = logical_port_release;
  2559. ret = of_device_register(&port->ofdev);
  2560. if (ret) {
  2561. ehea_error("failed to register device. ret=%d", ret);
  2562. goto out;
  2563. }
  2564. ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
  2565. if (ret) {
  2566. ehea_error("failed to register attributes, ret=%d", ret);
  2567. goto out_unreg_of_dev;
  2568. }
  2569. return &port->ofdev.dev;
  2570. out_unreg_of_dev:
  2571. of_device_unregister(&port->ofdev);
  2572. out:
  2573. return NULL;
  2574. }
  2575. static void ehea_unregister_port(struct ehea_port *port)
  2576. {
  2577. device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
  2578. of_device_unregister(&port->ofdev);
  2579. }
  2580. static const struct net_device_ops ehea_netdev_ops = {
  2581. .ndo_open = ehea_open,
  2582. .ndo_stop = ehea_stop,
  2583. .ndo_start_xmit = ehea_start_xmit,
  2584. #ifdef CONFIG_NET_POLL_CONTROLLER
  2585. .ndo_poll_controller = ehea_netpoll,
  2586. #endif
  2587. .ndo_get_stats = ehea_get_stats,
  2588. .ndo_set_mac_address = ehea_set_mac_addr,
  2589. .ndo_validate_addr = eth_validate_addr,
  2590. .ndo_set_multicast_list = ehea_set_multicast_list,
  2591. .ndo_change_mtu = ehea_change_mtu,
  2592. .ndo_vlan_rx_register = ehea_vlan_rx_register,
  2593. .ndo_vlan_rx_add_vid = ehea_vlan_rx_add_vid,
  2594. .ndo_vlan_rx_kill_vid = ehea_vlan_rx_kill_vid,
  2595. .ndo_tx_timeout = ehea_tx_watchdog,
  2596. };
  2597. struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
  2598. u32 logical_port_id,
  2599. struct device_node *dn)
  2600. {
  2601. int ret;
  2602. struct net_device *dev;
  2603. struct ehea_port *port;
  2604. struct device *port_dev;
  2605. int jumbo;
  2606. /* allocate memory for the port structures */
  2607. dev = alloc_etherdev(sizeof(struct ehea_port));
  2608. if (!dev) {
  2609. ehea_error("no mem for net_device");
  2610. ret = -ENOMEM;
  2611. goto out_err;
  2612. }
  2613. port = netdev_priv(dev);
  2614. mutex_init(&port->port_lock);
  2615. port->state = EHEA_PORT_DOWN;
  2616. port->sig_comp_iv = sq_entries / 10;
  2617. port->adapter = adapter;
  2618. port->netdev = dev;
  2619. port->logical_port_id = logical_port_id;
  2620. port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
  2621. port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
  2622. if (!port->mc_list) {
  2623. ret = -ENOMEM;
  2624. goto out_free_ethdev;
  2625. }
  2626. INIT_LIST_HEAD(&port->mc_list->list);
  2627. ret = ehea_sense_port_attr(port);
  2628. if (ret)
  2629. goto out_free_mc_list;
  2630. port_dev = ehea_register_port(port, dn);
  2631. if (!port_dev)
  2632. goto out_free_mc_list;
  2633. SET_NETDEV_DEV(dev, port_dev);
  2634. /* initialize net_device structure */
  2635. memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
  2636. dev->netdev_ops = &ehea_netdev_ops;
  2637. ehea_set_ethtool_ops(dev);
  2638. dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
  2639. | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX
  2640. | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
  2641. | NETIF_F_LLTX;
  2642. dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
  2643. INIT_WORK(&port->reset_task, ehea_reset_port);
  2644. ret = register_netdev(dev);
  2645. if (ret) {
  2646. ehea_error("register_netdev failed. ret=%d", ret);
  2647. goto out_unreg_port;
  2648. }
  2649. port->lro_max_aggr = lro_max_aggr;
  2650. ret = ehea_get_jumboframe_status(port, &jumbo);
  2651. if (ret)
  2652. ehea_error("failed determining jumbo frame status for %s",
  2653. port->netdev->name);
  2654. ehea_info("%s: Jumbo frames are %sabled", dev->name,
  2655. jumbo == 1 ? "en" : "dis");
  2656. adapter->active_ports++;
  2657. return port;
  2658. out_unreg_port:
  2659. ehea_unregister_port(port);
  2660. out_free_mc_list:
  2661. kfree(port->mc_list);
  2662. out_free_ethdev:
  2663. free_netdev(dev);
  2664. out_err:
  2665. ehea_error("setting up logical port with id=%d failed, ret=%d",
  2666. logical_port_id, ret);
  2667. return NULL;
  2668. }
  2669. static void ehea_shutdown_single_port(struct ehea_port *port)
  2670. {
  2671. struct ehea_adapter *adapter = port->adapter;
  2672. unregister_netdev(port->netdev);
  2673. ehea_unregister_port(port);
  2674. kfree(port->mc_list);
  2675. free_netdev(port->netdev);
  2676. adapter->active_ports--;
  2677. }
  2678. static int ehea_setup_ports(struct ehea_adapter *adapter)
  2679. {
  2680. struct device_node *lhea_dn;
  2681. struct device_node *eth_dn = NULL;
  2682. const u32 *dn_log_port_id;
  2683. int i = 0;
  2684. lhea_dn = adapter->ofdev->node;
  2685. while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
  2686. dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
  2687. NULL);
  2688. if (!dn_log_port_id) {
  2689. ehea_error("bad device node: eth_dn name=%s",
  2690. eth_dn->full_name);
  2691. continue;
  2692. }
  2693. if (ehea_add_adapter_mr(adapter)) {
  2694. ehea_error("creating MR failed");
  2695. of_node_put(eth_dn);
  2696. return -EIO;
  2697. }
  2698. adapter->port[i] = ehea_setup_single_port(adapter,
  2699. *dn_log_port_id,
  2700. eth_dn);
  2701. if (adapter->port[i])
  2702. ehea_info("%s -> logical port id #%d",
  2703. adapter->port[i]->netdev->name,
  2704. *dn_log_port_id);
  2705. else
  2706. ehea_remove_adapter_mr(adapter);
  2707. i++;
  2708. };
  2709. return 0;
  2710. }
  2711. static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
  2712. u32 logical_port_id)
  2713. {
  2714. struct device_node *lhea_dn;
  2715. struct device_node *eth_dn = NULL;
  2716. const u32 *dn_log_port_id;
  2717. lhea_dn = adapter->ofdev->node;
  2718. while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
  2719. dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
  2720. NULL);
  2721. if (dn_log_port_id)
  2722. if (*dn_log_port_id == logical_port_id)
  2723. return eth_dn;
  2724. };
  2725. return NULL;
  2726. }
  2727. static ssize_t ehea_probe_port(struct device *dev,
  2728. struct device_attribute *attr,
  2729. const char *buf, size_t count)
  2730. {
  2731. struct ehea_adapter *adapter = dev_get_drvdata(dev);
  2732. struct ehea_port *port;
  2733. struct device_node *eth_dn = NULL;
  2734. int i;
  2735. u32 logical_port_id;
  2736. sscanf(buf, "%d", &logical_port_id);
  2737. port = ehea_get_port(adapter, logical_port_id);
  2738. if (port) {
  2739. ehea_info("adding port with logical port id=%d failed. port "
  2740. "already configured as %s.", logical_port_id,
  2741. port->netdev->name);
  2742. return -EINVAL;
  2743. }
  2744. eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
  2745. if (!eth_dn) {
  2746. ehea_info("no logical port with id %d found", logical_port_id);
  2747. return -EINVAL;
  2748. }
  2749. if (ehea_add_adapter_mr(adapter)) {
  2750. ehea_error("creating MR failed");
  2751. return -EIO;
  2752. }
  2753. port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
  2754. of_node_put(eth_dn);
  2755. if (port) {
  2756. for (i = 0; i < EHEA_MAX_PORTS; i++)
  2757. if (!adapter->port[i]) {
  2758. adapter->port[i] = port;
  2759. break;
  2760. }
  2761. ehea_info("added %s (logical port id=%d)", port->netdev->name,
  2762. logical_port_id);
  2763. } else {
  2764. ehea_remove_adapter_mr(adapter);
  2765. return -EIO;
  2766. }
  2767. return (ssize_t) count;
  2768. }
  2769. static ssize_t ehea_remove_port(struct device *dev,
  2770. struct device_attribute *attr,
  2771. const char *buf, size_t count)
  2772. {
  2773. struct ehea_adapter *adapter = dev_get_drvdata(dev);
  2774. struct ehea_port *port;
  2775. int i;
  2776. u32 logical_port_id;
  2777. sscanf(buf, "%d", &logical_port_id);
  2778. port = ehea_get_port(adapter, logical_port_id);
  2779. if (port) {
  2780. ehea_info("removed %s (logical port id=%d)", port->netdev->name,
  2781. logical_port_id);
  2782. ehea_shutdown_single_port(port);
  2783. for (i = 0; i < EHEA_MAX_PORTS; i++)
  2784. if (adapter->port[i] == port) {
  2785. adapter->port[i] = NULL;
  2786. break;
  2787. }
  2788. } else {
  2789. ehea_error("removing port with logical port id=%d failed. port "
  2790. "not configured.", logical_port_id);
  2791. return -EINVAL;
  2792. }
  2793. ehea_remove_adapter_mr(adapter);
  2794. return (ssize_t) count;
  2795. }
  2796. static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
  2797. static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
  2798. int ehea_create_device_sysfs(struct of_device *dev)
  2799. {
  2800. int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
  2801. if (ret)
  2802. goto out;
  2803. ret = device_create_file(&dev->dev, &dev_attr_remove_port);
  2804. out:
  2805. return ret;
  2806. }
  2807. void ehea_remove_device_sysfs(struct of_device *dev)
  2808. {
  2809. device_remove_file(&dev->dev, &dev_attr_probe_port);
  2810. device_remove_file(&dev->dev, &dev_attr_remove_port);
  2811. }
  2812. static int __devinit ehea_probe_adapter(struct of_device *dev,
  2813. const struct of_device_id *id)
  2814. {
  2815. struct ehea_adapter *adapter;
  2816. const u64 *adapter_handle;
  2817. int ret;
  2818. if (!dev || !dev->node) {
  2819. ehea_error("Invalid ibmebus device probed");
  2820. return -EINVAL;
  2821. }
  2822. adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
  2823. if (!adapter) {
  2824. ret = -ENOMEM;
  2825. dev_err(&dev->dev, "no mem for ehea_adapter\n");
  2826. goto out;
  2827. }
  2828. list_add(&adapter->list, &adapter_list);
  2829. adapter->ofdev = dev;
  2830. adapter_handle = of_get_property(dev->node, "ibm,hea-handle",
  2831. NULL);
  2832. if (adapter_handle)
  2833. adapter->handle = *adapter_handle;
  2834. if (!adapter->handle) {
  2835. dev_err(&dev->dev, "failed getting handle for adapter"
  2836. " '%s'\n", dev->node->full_name);
  2837. ret = -ENODEV;
  2838. goto out_free_ad;
  2839. }
  2840. adapter->pd = EHEA_PD_ID;
  2841. dev_set_drvdata(&dev->dev, adapter);
  2842. /* initialize adapter and ports */
  2843. /* get adapter properties */
  2844. ret = ehea_sense_adapter_attr(adapter);
  2845. if (ret) {
  2846. dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
  2847. goto out_free_ad;
  2848. }
  2849. adapter->neq = ehea_create_eq(adapter,
  2850. EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
  2851. if (!adapter->neq) {
  2852. ret = -EIO;
  2853. dev_err(&dev->dev, "NEQ creation failed\n");
  2854. goto out_free_ad;
  2855. }
  2856. tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
  2857. (unsigned long)adapter);
  2858. ret = ibmebus_request_irq(adapter->neq->attr.ist1,
  2859. ehea_interrupt_neq, IRQF_DISABLED,
  2860. "ehea_neq", adapter);
  2861. if (ret) {
  2862. dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
  2863. goto out_kill_eq;
  2864. }
  2865. ret = ehea_create_device_sysfs(dev);
  2866. if (ret)
  2867. goto out_free_irq;
  2868. ret = ehea_setup_ports(adapter);
  2869. if (ret) {
  2870. dev_err(&dev->dev, "setup_ports failed\n");
  2871. goto out_rem_dev_sysfs;
  2872. }
  2873. ret = 0;
  2874. goto out;
  2875. out_rem_dev_sysfs:
  2876. ehea_remove_device_sysfs(dev);
  2877. out_free_irq:
  2878. ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
  2879. out_kill_eq:
  2880. ehea_destroy_eq(adapter->neq);
  2881. out_free_ad:
  2882. list_del(&adapter->list);
  2883. kfree(adapter);
  2884. out:
  2885. ehea_update_firmware_handles();
  2886. return ret;
  2887. }
  2888. static int __devexit ehea_remove(struct of_device *dev)
  2889. {
  2890. struct ehea_adapter *adapter = dev_get_drvdata(&dev->dev);
  2891. int i;
  2892. for (i = 0; i < EHEA_MAX_PORTS; i++)
  2893. if (adapter->port[i]) {
  2894. ehea_shutdown_single_port(adapter->port[i]);
  2895. adapter->port[i] = NULL;
  2896. }
  2897. ehea_remove_device_sysfs(dev);
  2898. flush_scheduled_work();
  2899. ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
  2900. tasklet_kill(&adapter->neq_tasklet);
  2901. ehea_destroy_eq(adapter->neq);
  2902. ehea_remove_adapter_mr(adapter);
  2903. list_del(&adapter->list);
  2904. kfree(adapter);
  2905. ehea_update_firmware_handles();
  2906. return 0;
  2907. }
  2908. void ehea_crash_handler(void)
  2909. {
  2910. int i;
  2911. if (ehea_fw_handles.arr)
  2912. for (i = 0; i < ehea_fw_handles.num_entries; i++)
  2913. ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
  2914. ehea_fw_handles.arr[i].fwh,
  2915. FORCE_FREE);
  2916. if (ehea_bcmc_regs.arr)
  2917. for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
  2918. ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
  2919. ehea_bcmc_regs.arr[i].port_id,
  2920. ehea_bcmc_regs.arr[i].reg_type,
  2921. ehea_bcmc_regs.arr[i].macaddr,
  2922. 0, H_DEREG_BCMC);
  2923. }
  2924. static int ehea_mem_notifier(struct notifier_block *nb,
  2925. unsigned long action, void *data)
  2926. {
  2927. int ret = NOTIFY_BAD;
  2928. struct memory_notify *arg = data;
  2929. if (!mutex_trylock(&dlpar_mem_lock)) {
  2930. ehea_info("ehea_mem_notifier must not be called parallelized");
  2931. goto out;
  2932. }
  2933. switch (action) {
  2934. case MEM_CANCEL_OFFLINE:
  2935. ehea_info("memory offlining canceled");
  2936. /* Readd canceled memory block */
  2937. case MEM_ONLINE:
  2938. ehea_info("memory is going online");
  2939. set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
  2940. if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
  2941. goto out_unlock;
  2942. ehea_rereg_mrs(NULL);
  2943. break;
  2944. case MEM_GOING_OFFLINE:
  2945. ehea_info("memory is going offline");
  2946. set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
  2947. if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
  2948. goto out_unlock;
  2949. ehea_rereg_mrs(NULL);
  2950. break;
  2951. default:
  2952. break;
  2953. }
  2954. ehea_update_firmware_handles();
  2955. ret = NOTIFY_OK;
  2956. out_unlock:
  2957. mutex_unlock(&dlpar_mem_lock);
  2958. out:
  2959. return ret;
  2960. }
  2961. static struct notifier_block ehea_mem_nb = {
  2962. .notifier_call = ehea_mem_notifier,
  2963. };
  2964. static int ehea_reboot_notifier(struct notifier_block *nb,
  2965. unsigned long action, void *unused)
  2966. {
  2967. if (action == SYS_RESTART) {
  2968. ehea_info("Reboot: freeing all eHEA resources");
  2969. ibmebus_unregister_driver(&ehea_driver);
  2970. }
  2971. return NOTIFY_DONE;
  2972. }
  2973. static struct notifier_block ehea_reboot_nb = {
  2974. .notifier_call = ehea_reboot_notifier,
  2975. };
  2976. static int check_module_parm(void)
  2977. {
  2978. int ret = 0;
  2979. if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
  2980. (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
  2981. ehea_info("Bad parameter: rq1_entries");
  2982. ret = -EINVAL;
  2983. }
  2984. if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
  2985. (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
  2986. ehea_info("Bad parameter: rq2_entries");
  2987. ret = -EINVAL;
  2988. }
  2989. if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
  2990. (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
  2991. ehea_info("Bad parameter: rq3_entries");
  2992. ret = -EINVAL;
  2993. }
  2994. if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
  2995. (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
  2996. ehea_info("Bad parameter: sq_entries");
  2997. ret = -EINVAL;
  2998. }
  2999. return ret;
  3000. }
  3001. static ssize_t ehea_show_capabilities(struct device_driver *drv,
  3002. char *buf)
  3003. {
  3004. return sprintf(buf, "%d", EHEA_CAPABILITIES);
  3005. }
  3006. static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
  3007. ehea_show_capabilities, NULL);
  3008. int __init ehea_module_init(void)
  3009. {
  3010. int ret;
  3011. printk(KERN_INFO "IBM eHEA ethernet device driver (Release %s)\n",
  3012. DRV_VERSION);
  3013. INIT_WORK(&ehea_rereg_mr_task, ehea_rereg_mrs);
  3014. memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
  3015. memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
  3016. mutex_init(&ehea_fw_handles.lock);
  3017. spin_lock_init(&ehea_bcmc_regs.lock);
  3018. ret = check_module_parm();
  3019. if (ret)
  3020. goto out;
  3021. ret = ehea_create_busmap();
  3022. if (ret)
  3023. goto out;
  3024. ret = register_reboot_notifier(&ehea_reboot_nb);
  3025. if (ret)
  3026. ehea_info("failed registering reboot notifier");
  3027. ret = register_memory_notifier(&ehea_mem_nb);
  3028. if (ret)
  3029. ehea_info("failed registering memory remove notifier");
  3030. ret = crash_shutdown_register(&ehea_crash_handler);
  3031. if (ret)
  3032. ehea_info("failed registering crash handler");
  3033. ret = ibmebus_register_driver(&ehea_driver);
  3034. if (ret) {
  3035. ehea_error("failed registering eHEA device driver on ebus");
  3036. goto out2;
  3037. }
  3038. ret = driver_create_file(&ehea_driver.driver,
  3039. &driver_attr_capabilities);
  3040. if (ret) {
  3041. ehea_error("failed to register capabilities attribute, ret=%d",
  3042. ret);
  3043. goto out3;
  3044. }
  3045. return ret;
  3046. out3:
  3047. ibmebus_unregister_driver(&ehea_driver);
  3048. out2:
  3049. unregister_memory_notifier(&ehea_mem_nb);
  3050. unregister_reboot_notifier(&ehea_reboot_nb);
  3051. crash_shutdown_unregister(&ehea_crash_handler);
  3052. out:
  3053. return ret;
  3054. }
  3055. static void __exit ehea_module_exit(void)
  3056. {
  3057. int ret;
  3058. flush_scheduled_work();
  3059. driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
  3060. ibmebus_unregister_driver(&ehea_driver);
  3061. unregister_reboot_notifier(&ehea_reboot_nb);
  3062. ret = crash_shutdown_unregister(&ehea_crash_handler);
  3063. if (ret)
  3064. ehea_info("failed unregistering crash handler");
  3065. unregister_memory_notifier(&ehea_mem_nb);
  3066. kfree(ehea_fw_handles.arr);
  3067. kfree(ehea_bcmc_regs.arr);
  3068. ehea_destroy_busmap();
  3069. }
  3070. module_init(ehea_module_init);
  3071. module_exit(ehea_module_exit);