1 /* Copyright 2008 - 2016 Freescale Semiconductor, Inc.
2 *
3 * Redistribution and use in source and binary forms, with or without
4 * modification, are permitted provided that the following conditions are met:
5 * * Redistributions of source code must retain the above copyright
6 * notice, this list of conditions and the following disclaimer.
7 * * Redistributions in binary form must reproduce the above copyright
8 * notice, this list of conditions and the following disclaimer in the
9 * documentation and/or other materials provided with the distribution.
10 * * Neither the name of Freescale Semiconductor nor the
11 * names of its contributors may be used to endorse or promote products
12 * derived from this software without specific prior written permission.
13 *
14 * ALTERNATIVELY, this software may be distributed under the terms of the
15 * GNU General Public License ("GPL") as published by the Free Software
16 * Foundation, either version 2 of that License or (at your option) any
17 * later version.
18 *
19 * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
20 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
22 * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
23 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
24 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
26 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
28 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "qman_test.h"
32
33 #define CGR_ID 27
34 #define POOL_ID 2
35 #define FQ_FLAGS QMAN_FQ_FLAG_DYNAMIC_FQID
36 #define NUM_ENQUEUES 10
37 #define NUM_PARTIAL 4
38 #define PORTAL_SDQCR (QM_SDQCR_SOURCE_CHANNELS | \
39 QM_SDQCR_TYPE_PRIO_QOS | \
40 QM_SDQCR_TOKEN_SET(0x98) | \
41 QM_SDQCR_CHANNELS_DEDICATED | \
42 QM_SDQCR_CHANNELS_POOL(POOL_ID))
43 #define PORTAL_OPAQUE ((void *)0xf00dbeef)
44 #define VDQCR_FLAGS (QMAN_VOLATILE_FLAG_WAIT | QMAN_VOLATILE_FLAG_FINISH)
45
46 static enum qman_cb_dqrr_result cb_dqrr(struct qman_portal *,
47 struct qman_fq *,
48 const struct qm_dqrr_entry *,
49 bool sched_napi);
50 static void cb_ern(struct qman_portal *, struct qman_fq *,
51 const union qm_mr_entry *);
52 static void cb_fqs(struct qman_portal *, struct qman_fq *,
53 const union qm_mr_entry *);
54
55 static struct qm_fd fd, fd_dq;
56 static struct qman_fq fq_base = {
57 .cb.dqrr = cb_dqrr,
58 .cb.ern = cb_ern,
59 .cb.fqs = cb_fqs
60 };
61 static DECLARE_WAIT_QUEUE_HEAD(waitqueue);
62 static int retire_complete, sdqcr_complete;
63
64 /* Helpers for initialising and "incrementing" a frame descriptor */
fd_init(struct qm_fd * fd)65 static void fd_init(struct qm_fd *fd)
66 {
67 qm_fd_addr_set64(fd, 0xabdeadbeefLLU);
68 qm_fd_set_contig_big(fd, 0x0000ffff);
69 fd->cmd = cpu_to_be32(0xfeedf00d);
70 }
71
fd_inc(struct qm_fd * fd)72 static void fd_inc(struct qm_fd *fd)
73 {
74 u64 t = qm_fd_addr_get64(fd);
75 int z = t >> 40;
76 unsigned int len, off;
77 enum qm_fd_format fmt;
78
79 t <<= 1;
80 if (z)
81 t |= 1;
82 qm_fd_addr_set64(fd, t);
83
84 fmt = qm_fd_get_format(fd);
85 off = qm_fd_get_offset(fd);
86 len = qm_fd_get_length(fd);
87 len--;
88 qm_fd_set_param(fd, fmt, off, len);
89
90 be32_add_cpu(&fd->cmd, 1);
91 }
92
93 /* The only part of the 'fd' we can't memcmp() is the ppid */
fd_neq(const struct qm_fd * a,const struct qm_fd * b)94 static bool fd_neq(const struct qm_fd *a, const struct qm_fd *b)
95 {
96 bool neq = qm_fd_addr_get64(a) != qm_fd_addr_get64(b);
97
98 neq |= qm_fd_get_format(a) != qm_fd_get_format(b);
99 neq |= a->cfg != b->cfg;
100 neq |= a->cmd != b->cmd;
101
102 return neq;
103 }
104
105 /* test */
do_enqueues(struct qman_fq * fq)106 static int do_enqueues(struct qman_fq *fq)
107 {
108 unsigned int loop;
109 int err = 0;
110
111 for (loop = 0; loop < NUM_ENQUEUES; loop++) {
112 if (qman_enqueue(fq, &fd)) {
113 pr_crit("qman_enqueue() failed\n");
114 err = -EIO;
115 }
116 fd_inc(&fd);
117 }
118
119 return err;
120 }
121
qman_test_api(void)122 int qman_test_api(void)
123 {
124 unsigned int flags, frmcnt;
125 int err;
126 struct qman_fq *fq = &fq_base;
127
128 pr_info("%s(): Starting\n", __func__);
129 fd_init(&fd);
130 fd_init(&fd_dq);
131
132 /* Initialise (parked) FQ */
133 err = qman_create_fq(0, FQ_FLAGS, fq);
134 if (err) {
135 pr_crit("qman_create_fq() failed\n");
136 goto failed;
137 }
138 err = qman_init_fq(fq, QMAN_INITFQ_FLAG_LOCAL, NULL);
139 if (err) {
140 pr_crit("qman_init_fq() failed\n");
141 goto failed;
142 }
143 /* Do enqueues + VDQCR, twice. (Parked FQ) */
144 err = do_enqueues(fq);
145 if (err)
146 goto failed;
147 pr_info("VDQCR (till-empty);\n");
148 frmcnt = QM_VDQCR_NUMFRAMES_TILLEMPTY;
149 err = qman_volatile_dequeue(fq, VDQCR_FLAGS, frmcnt);
150 if (err) {
151 pr_crit("qman_volatile_dequeue() failed\n");
152 goto failed;
153 }
154 err = do_enqueues(fq);
155 if (err)
156 goto failed;
157 pr_info("VDQCR (%d of %d);\n", NUM_PARTIAL, NUM_ENQUEUES);
158 frmcnt = QM_VDQCR_NUMFRAMES_SET(NUM_PARTIAL);
159 err = qman_volatile_dequeue(fq, VDQCR_FLAGS, frmcnt);
160 if (err) {
161 pr_crit("qman_volatile_dequeue() failed\n");
162 goto failed;
163 }
164 pr_info("VDQCR (%d of %d);\n", NUM_ENQUEUES - NUM_PARTIAL,
165 NUM_ENQUEUES);
166 frmcnt = QM_VDQCR_NUMFRAMES_SET(NUM_ENQUEUES - NUM_PARTIAL);
167 err = qman_volatile_dequeue(fq, VDQCR_FLAGS, frmcnt);
168 if (err) {
169 pr_err("qman_volatile_dequeue() failed\n");
170 goto failed;
171 }
172
173 err = do_enqueues(fq);
174 if (err)
175 goto failed;
176 pr_info("scheduled dequeue (till-empty)\n");
177 err = qman_schedule_fq(fq);
178 if (err) {
179 pr_crit("qman_schedule_fq() failed\n");
180 goto failed;
181 }
182 wait_event(waitqueue, sdqcr_complete);
183
184 /* Retire and OOS the FQ */
185 err = qman_retire_fq(fq, &flags);
186 if (err < 0) {
187 pr_crit("qman_retire_fq() failed\n");
188 goto failed;
189 }
190 wait_event(waitqueue, retire_complete);
191 if (flags & QMAN_FQ_STATE_BLOCKOOS) {
192 err = -EIO;
193 pr_crit("leaking frames\n");
194 goto failed;
195 }
196 err = qman_oos_fq(fq);
197 if (err) {
198 pr_crit("qman_oos_fq() failed\n");
199 goto failed;
200 }
201 qman_destroy_fq(fq);
202 pr_info("%s(): Finished\n", __func__);
203 return 0;
204
205 failed:
206 WARN_ON(1);
207 return err;
208 }
209
cb_dqrr(struct qman_portal * p,struct qman_fq * fq,const struct qm_dqrr_entry * dq,bool sched_napi)210 static enum qman_cb_dqrr_result cb_dqrr(struct qman_portal *p,
211 struct qman_fq *fq,
212 const struct qm_dqrr_entry *dq,
213 bool sched_napi)
214 {
215 if (WARN_ON(fd_neq(&fd_dq, &dq->fd))) {
216 pr_err("BADNESS: dequeued frame doesn't match;\n");
217 return qman_cb_dqrr_consume;
218 }
219 fd_inc(&fd_dq);
220 if (!(dq->stat & QM_DQRR_STAT_UNSCHEDULED) && !fd_neq(&fd_dq, &fd)) {
221 sdqcr_complete = 1;
222 wake_up(&waitqueue);
223 }
224 return qman_cb_dqrr_consume;
225 }
226
cb_ern(struct qman_portal * p,struct qman_fq * fq,const union qm_mr_entry * msg)227 static void cb_ern(struct qman_portal *p, struct qman_fq *fq,
228 const union qm_mr_entry *msg)
229 {
230 pr_crit("cb_ern() unimplemented");
231 WARN_ON(1);
232 }
233
cb_fqs(struct qman_portal * p,struct qman_fq * fq,const union qm_mr_entry * msg)234 static void cb_fqs(struct qman_portal *p, struct qman_fq *fq,
235 const union qm_mr_entry *msg)
236 {
237 u8 verb = (msg->verb & QM_MR_VERB_TYPE_MASK);
238
239 if ((verb != QM_MR_VERB_FQRN) && (verb != QM_MR_VERB_FQRNI)) {
240 pr_crit("unexpected FQS message");
241 WARN_ON(1);
242 return;
243 }
244 pr_info("Retirement message received\n");
245 retire_complete = 1;
246 wake_up(&waitqueue);
247 }
248