1 /* Copyright 2008 - 2016 Freescale Semiconductor, Inc.
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14  * ALTERNATIVELY, this software may be distributed under the terms of the
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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