xref: /freebsd/sys/dev/qlxge/qls_isr.c (revision ea825d02749f382c3f7e17f28247f20a48733eab) 
1 /*
2  * Copyright (c) 2013-2014 Qlogic Corporation
3  * All rights reserved.
4  *
5  *  Redistribution and use in source and binary forms, with or without
6  *  modification, are permitted provided that the following conditions
7  *  are met:
8  *
9  *  1. Redistributions of source code must retain the above copyright
10  *     notice, this list of conditions and the following disclaimer.
11  *  2. Redistributions in binary form must reproduce the above copyright
12  *     notice, this list of conditions and the following disclaimer in the
13  *     documentation and/or other materials provided with the distribution.
14  *
15  *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16  *  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17  *  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18  *  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
19  *  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
20  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
21  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
22  *  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
23  *  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
24  *  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
25  *  POSSIBILITY OF SUCH DAMAGE.
26  */
27 
28 /*
29  * File: qls_isr.c
30  * Author : David C Somayajulu, Qlogic Corporation, Aliso Viejo, CA 92656.
31  */
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
34 
35 
36 
37 #include "qls_os.h"
38 #include "qls_hw.h"
39 #include "qls_def.h"
40 #include "qls_inline.h"
41 #include "qls_ver.h"
42 #include "qls_glbl.h"
43 #include "qls_dbg.h"
44 
45 
46 static void
47 qls_tx_comp(qla_host_t *ha, uint32_t txr_idx, q81_tx_mac_comp_t *tx_comp)
48 {
49 	qla_tx_buf_t *txb;
50 	uint32_t tx_idx = tx_comp->tid_lo;
51 
52 	if (tx_idx >= NUM_TX_DESCRIPTORS) {
53 		ha->qla_initiate_recovery = 1;
54 		return;
55 	}
56 
57 	txb = &ha->tx_ring[txr_idx].tx_buf[tx_idx];
58 
59 	if (txb->m_head) {
60 		if_inc_counter(ha->ifp, IFCOUNTER_OPACKETS, 1);
61 		bus_dmamap_sync(ha->tx_tag, txb->map,
62 		        BUS_DMASYNC_POSTWRITE);
63 		bus_dmamap_unload(ha->tx_tag, txb->map);
64 		m_freem(txb->m_head);
65 
66 		txb->m_head = NULL;
67 	}
68 
69         ha->tx_ring[txr_idx].txr_done++;
70 
71 	if (ha->tx_ring[txr_idx].txr_done == NUM_TX_DESCRIPTORS)
72 		ha->tx_ring[txr_idx].txr_done = 0;
73 }
74 
75 static void
76 qls_replenish_rx(qla_host_t *ha, uint32_t r_idx)
77 {
78         qla_rx_buf_t			*rxb;
79 	qla_rx_ring_t			*rxr;
80         int				count;
81 	volatile q81_bq_addr_e_t	*sbq_e;
82 
83 	rxr = &ha->rx_ring[r_idx];
84 
85 	count = rxr->rx_free;
86 	sbq_e = rxr->sbq_vaddr;
87 
88         while (count--) {
89 
90 		rxb = &rxr->rx_buf[rxr->sbq_next];
91 
92 		if (rxb->m_head == NULL) {
93                 	if (qls_get_mbuf(ha, rxb, NULL) != 0) {
94                         	device_printf(ha->pci_dev,
95 					"%s: qls_get_mbuf [0,%d,%d] failed\n",
96 					__func__, rxr->sbq_next, r_idx);
97 				rxb->m_head = NULL;
98 				break;
99 			}
100 		}
101 
102 		if (rxb->m_head != NULL) {
103 			sbq_e[rxr->sbq_next].addr_lo = (uint32_t)rxb->paddr;
104 			sbq_e[rxr->sbq_next].addr_hi =
105 				(uint32_t)(rxb->paddr >> 32);
106 
107                         rxr->sbq_next++;
108                         if (rxr->sbq_next == NUM_RX_DESCRIPTORS)
109                                 rxr->sbq_next = 0;
110 
111 			rxr->sbq_free++;
112                 	rxr->rx_free--;
113 		}
114 
115                 if (rxr->sbq_free == 16) {
116 
117 			rxr->sbq_in += 16;
118 			rxr->sbq_in = rxr->sbq_in & (NUM_RX_DESCRIPTORS - 1);
119 			rxr->sbq_free = 0;
120 
121 			Q81_WR_SBQ_PROD_IDX(r_idx, (rxr->sbq_in));
122                 }
123         }
124 }
125 
126 static int
127 qls_rx_comp(qla_host_t *ha, uint32_t rxr_idx, uint32_t cq_idx, q81_rx_t *cq_e)
128 {
129 	qla_rx_buf_t	*rxb;
130 	qla_rx_ring_t	*rxr;
131 	device_t	dev = ha->pci_dev;
132 	struct mbuf     *mp = NULL;
133 	struct ifnet	*ifp = ha->ifp;
134 	struct lro_ctrl	*lro;
135 	struct ether_vlan_header *eh;
136 
137 	rxr = &ha->rx_ring[rxr_idx];
138 
139 	lro = &rxr->lro;
140 
141 	rxb = &rxr->rx_buf[rxr->rx_next];
142 
143 	if (!(cq_e->flags1 & Q81_RX_FLAGS1_DS)) {
144 		device_printf(dev, "%s: DS bit not set \n", __func__);
145 		return -1;
146 	}
147 	if (rxb->paddr != cq_e->b_paddr) {
148 
149 		device_printf(dev,
150 			"%s: (rxb->paddr != cq_e->b_paddr)[%p, %p] \n",
151 			__func__, (void *)rxb->paddr, (void *)cq_e->b_paddr);
152 
153 		Q81_SET_CQ_INVALID(cq_idx);
154 
155 		ha->qla_initiate_recovery = 1;
156 
157 		return(-1);
158 	}
159 
160 	rxr->rx_int++;
161 
162 	if ((cq_e->flags1 & Q81_RX_FLAGS1_ERR_MASK) == 0) {
163 
164 		mp = rxb->m_head;
165 		rxb->m_head = NULL;
166 
167 		if (mp == NULL) {
168 			device_printf(dev, "%s: mp == NULL\n", __func__);
169 		} else {
170 			mp->m_flags |= M_PKTHDR;
171 			mp->m_pkthdr.len = cq_e->length;
172 			mp->m_pkthdr.rcvif = ifp;
173 			mp->m_len = cq_e->length;
174 
175 			eh = mtod(mp, struct ether_vlan_header *);
176 
177 			if (eh->evl_encap_proto == htons(ETHERTYPE_VLAN)) {
178 				uint32_t *data = (uint32_t *)eh;
179 
180 				mp->m_pkthdr.ether_vtag = ntohs(eh->evl_tag);
181 				mp->m_flags |= M_VLANTAG;
182 
183 				*(data + 3) = *(data + 2);
184 				*(data + 2) = *(data + 1);
185 				*(data + 1) = *data;
186 
187 				m_adj(mp, ETHER_VLAN_ENCAP_LEN);
188 			}
189 
190 			if ((cq_e->flags1 & Q81_RX_FLAGS1_RSS_MATCH_MASK)) {
191 				rxr->rss_int++;
192 				mp->m_pkthdr.flowid = cq_e->rss;
193 				M_HASHTYPE_SET(mp, M_HASHTYPE_OPAQUE_HASH);
194 			}
195 			if (cq_e->flags0 & (Q81_RX_FLAGS0_TE |
196 				Q81_RX_FLAGS0_NU | Q81_RX_FLAGS0_IE)) {
197 				mp->m_pkthdr.csum_flags = 0;
198 			} else {
199 				mp->m_pkthdr.csum_flags = CSUM_IP_CHECKED |
200 					CSUM_IP_VALID | CSUM_DATA_VALID |
201 					CSUM_PSEUDO_HDR;
202 				mp->m_pkthdr.csum_data = 0xFFFF;
203 			}
204 			if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
205 
206 			if (lro->lro_cnt && (tcp_lro_rx(lro, mp, 0) == 0)) {
207 				/* LRO packet has been successfully queued */
208 			} else {
209 				(*ifp->if_input)(ifp, mp);
210 			}
211 		}
212 	} else {
213 		device_printf(dev, "%s: err [0%08x]\n", __func__, cq_e->flags1);
214 	}
215 
216 	rxr->rx_free++;
217 	rxr->rx_next++;
218 
219 	if (rxr->rx_next == NUM_RX_DESCRIPTORS)
220 		rxr->rx_next = 0;
221 
222 	if ((rxr->rx_free + rxr->sbq_free) >= 16)
223                 qls_replenish_rx(ha, rxr_idx);
224 
225 	return 0;
226 }
227 
228 static void
229 qls_cq_isr(qla_host_t *ha, uint32_t cq_idx)
230 {
231 	q81_cq_e_t *cq_e, *cq_b;
232 	uint32_t i, cq_comp_idx;
233 	int ret = 0, tx_comp_done = 0;
234 	struct lro_ctrl	*lro;
235 
236 	cq_b = ha->rx_ring[cq_idx].cq_base_vaddr;
237 	lro = &ha->rx_ring[cq_idx].lro;
238 
239 	cq_comp_idx = *(ha->rx_ring[cq_idx].cqi_vaddr);
240 
241 	i = ha->rx_ring[cq_idx].cq_next;
242 
243 	while (i != cq_comp_idx) {
244 
245 		cq_e = &cq_b[i];
246 
247 		switch (cq_e->opcode) {
248 
249                 case Q81_IOCB_TX_MAC:
250                 case Q81_IOCB_TX_TSO:
251                         qls_tx_comp(ha, cq_idx, (q81_tx_mac_comp_t *)cq_e);
252                         tx_comp_done++;
253                         break;
254 
255 		case Q81_IOCB_RX:
256 			ret = qls_rx_comp(ha, cq_idx, i, (q81_rx_t *)cq_e);
257 
258 			break;
259 
260 		case Q81_IOCB_MPI:
261 		case Q81_IOCB_SYS:
262 		default:
263 			device_printf(ha->pci_dev, "%s[%d %d 0x%x]: illegal \n",
264 				__func__, i, (*(ha->rx_ring[cq_idx].cqi_vaddr)),
265 				cq_e->opcode);
266 			qls_dump_buf32(ha, __func__, cq_e,
267 				(sizeof (q81_cq_e_t) >> 2));
268 			break;
269 		}
270 
271 		i++;
272 		if (i == NUM_CQ_ENTRIES)
273 			i = 0;
274 
275 		if (ret) {
276 			break;
277 		}
278 
279 		if (i == cq_comp_idx) {
280 			cq_comp_idx = *(ha->rx_ring[cq_idx].cqi_vaddr);
281 		}
282 
283                 if (tx_comp_done) {
284                         taskqueue_enqueue(ha->tx_tq, &ha->tx_task);
285                         tx_comp_done = 0;
286                 }
287 	}
288 
289 	tcp_lro_flush_all(lro);
290 
291 	ha->rx_ring[cq_idx].cq_next = cq_comp_idx;
292 
293 	if (!ret) {
294 		Q81_WR_CQ_CONS_IDX(cq_idx, (ha->rx_ring[cq_idx].cq_next));
295 	}
296         if (tx_comp_done)
297                 taskqueue_enqueue(ha->tx_tq, &ha->tx_task);
298 
299 	return;
300 }
301 
302 static void
303 qls_mbx_isr(qla_host_t *ha)
304 {
305 	uint32_t data;
306 	int i;
307 	device_t dev = ha->pci_dev;
308 
309 	if (qls_mbx_rd_reg(ha, 0, &data) == 0) {
310 
311 		if ((data & 0xF000) == 0x4000) {
312 			ha->mbox[0] = data;
313 			for (i = 1; i < Q81_NUM_MBX_REGISTERS; i++) {
314 				if (qls_mbx_rd_reg(ha, i, &data))
315 					break;
316 				ha->mbox[i] = data;
317 			}
318 			ha->mbx_done = 1;
319 		} else if ((data & 0xF000) == 0x8000) {
320 
321 			/* we have an AEN */
322 
323 			ha->aen[0] = data;
324 			for (i = 1; i < Q81_NUM_AEN_REGISTERS; i++) {
325 				if (qls_mbx_rd_reg(ha, i, &data))
326 					break;
327 				ha->aen[i] = data;
328 			}
329 			device_printf(dev,"%s: AEN "
330 				"[0x%08x 0x%08x 0x%08x 0x%08x 0x%08x"
331 				" 0x%08x 0x%08x 0x%08x 0x%08x]\n",
332 				__func__,
333 				ha->aen[0], ha->aen[1], ha->aen[2],
334 				ha->aen[3], ha->aen[4], ha->aen[5],
335 				ha->aen[6], ha->aen[7], ha->aen[8]);
336 
337 			switch ((ha->aen[0] & 0xFFFF)) {
338 
339 			case 0x8011:
340 				ha->link_up = 1;
341 				break;
342 
343 			case 0x8012:
344 				ha->link_up = 0;
345 				break;
346 
347 			case 0x8130:
348 				ha->link_hw_info = ha->aen[1];
349 				break;
350 
351 			case 0x8131:
352 				ha->link_hw_info = 0;
353 				break;
354 
355 			}
356 		}
357 	}
358 	WRITE_REG32(ha, Q81_CTL_HOST_CMD_STATUS, Q81_CTL_HCS_CMD_CLR_RTH_INTR);
359 
360 	return;
361 }
362 
363 void
364 qls_isr(void *arg)
365 {
366 	qla_ivec_t *ivec = arg;
367 	qla_host_t *ha;
368 	uint32_t status;
369 	uint32_t cq_idx;
370 	device_t dev;
371 
372 	ha = ivec->ha;
373 	cq_idx = ivec->cq_idx;
374 	dev = ha->pci_dev;
375 
376 	status = READ_REG32(ha, Q81_CTL_STATUS);
377 
378 	if (status & Q81_CTL_STATUS_FE) {
379 		device_printf(dev, "%s fatal error\n", __func__);
380 		return;
381 	}
382 
383 	if ((cq_idx == 0) && (status & Q81_CTL_STATUS_PI)) {
384 		qls_mbx_isr(ha);
385 	}
386 
387 	status = READ_REG32(ha, Q81_CTL_INTR_STATUS1);
388 
389 	if (status & ( 0x1 << cq_idx))
390 		qls_cq_isr(ha, cq_idx);
391 
392 	Q81_ENABLE_INTR(ha, cq_idx);
393 
394 	return;
395 }
396 
397