1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright © 2021-2022 Dmitry Salychev
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * 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 AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include <sys/cdefs.h>
29 /*
30 * The DPAA2 Concentrator (DPCON) driver.
31 *
32 * Supports configuration of QBMan channels for advanced scheduling of ingress
33 * packets from one or more network interfaces.
34 *
35 * DPCONs are used to distribute Rx or Tx Confirmation traffic to different
36 * cores, via affine DPIO objects. The implication is that one DPCON must be
37 * available for each core where Rx or Tx Confirmation traffic should be
38 * distributed to.
39 *
40 * QBMan channel contains several work queues. The WQs within a channel have a
41 * priority relative to each other. Each channel consists of either eight or two
42 * WQs, and thus, there are either eight or two possible priorities in a channel.
43 */
44
45 #include <sys/param.h>
46 #include <sys/kernel.h>
47 #include <sys/bus.h>
48 #include <sys/rman.h>
49 #include <sys/module.h>
50 #include <sys/malloc.h>
51 #include <sys/mutex.h>
52
53 #include <vm/vm.h>
54
55 #include <machine/bus.h>
56 #include <machine/resource.h>
57
58 #include <dev/pci/pcivar.h>
59
60 #include "pcib_if.h"
61 #include "pci_if.h"
62
63 #include "dpaa2_mcp.h"
64 #include "dpaa2_swp.h"
65 #include "dpaa2_mc.h"
66 #include "dpaa2_cmd_if.h"
67
68 /* DPAA2 Concentrator resource specification. */
69 struct resource_spec dpaa2_con_spec[] = {
70 /*
71 * DPMCP resources.
72 *
73 * NOTE: MC command portals (MCPs) are used to send commands to, and
74 * receive responses from, the MC firmware. One portal per DPCON.
75 */
76 #define MCP_RES_NUM (1u)
77 #define MCP_RID_OFF (0u)
78 #define MCP_RID(rid) ((rid) + MCP_RID_OFF)
79 /* --- */
80 { DPAA2_DEV_MCP, MCP_RID(0), RF_ACTIVE | RF_SHAREABLE | RF_OPTIONAL },
81 /* --- */
82 RESOURCE_SPEC_END
83 };
84
85 static int dpaa2_con_detach(device_t dev);
86
87 /*
88 * Device interface.
89 */
90
91 static int
dpaa2_con_probe(device_t dev)92 dpaa2_con_probe(device_t dev)
93 {
94 /* DPCON device will be added by a parent resource container itself. */
95 device_set_desc(dev, "DPAA2 Concentrator");
96 return (BUS_PROBE_DEFAULT);
97 }
98
99 static int
dpaa2_con_detach(device_t dev)100 dpaa2_con_detach(device_t dev)
101 {
102 /* TBD */
103 return (0);
104 }
105
106 static int
dpaa2_con_attach(device_t dev)107 dpaa2_con_attach(device_t dev)
108 {
109 device_t pdev = device_get_parent(dev);
110 device_t child = dev;
111 device_t mcp_dev;
112 struct dpaa2_con_softc *sc = device_get_softc(dev);
113 struct dpaa2_devinfo *rcinfo = device_get_ivars(pdev);
114 struct dpaa2_devinfo *dinfo = device_get_ivars(dev);
115 struct dpaa2_devinfo *mcp_dinfo;
116 struct dpaa2_cmd cmd;
117 uint16_t rc_token, con_token;
118 int error;
119
120 sc->dev = dev;
121
122 error = bus_alloc_resources(sc->dev, dpaa2_con_spec, sc->res);
123 if (error) {
124 device_printf(dev, "%s: failed to allocate resources: "
125 "error=%d\n", __func__, error);
126 goto err_exit;
127 }
128
129 /* Obtain MC portal. */
130 mcp_dev = (device_t) rman_get_start(sc->res[MCP_RID(0)]);
131 mcp_dinfo = device_get_ivars(mcp_dev);
132 dinfo->portal = mcp_dinfo->portal;
133
134 DPAA2_CMD_INIT(&cmd);
135
136 error = DPAA2_CMD_RC_OPEN(dev, child, &cmd, rcinfo->id, &rc_token);
137 if (error) {
138 device_printf(dev, "%s: failed to open DPRC: error=%d\n",
139 __func__, error);
140 goto err_exit;
141 }
142 error = DPAA2_CMD_CON_OPEN(dev, child, &cmd, dinfo->id, &con_token);
143 if (error) {
144 device_printf(dev, "%s: failed to open DPCON: id=%d, error=%d\n",
145 __func__, dinfo->id, error);
146 goto close_rc;
147 }
148
149 error = DPAA2_CMD_CON_RESET(dev, child, &cmd);
150 if (error) {
151 device_printf(dev, "%s: failed to reset DPCON: id=%d, "
152 "error=%d\n", __func__, dinfo->id, error);
153 goto close_con;
154 }
155 error = DPAA2_CMD_CON_GET_ATTRIBUTES(dev, child, &cmd, &sc->attr);
156 if (error) {
157 device_printf(dev, "%s: failed to get DPCON attributes: id=%d, "
158 "error=%d\n", __func__, dinfo->id, error);
159 goto close_con;
160 }
161
162 if (bootverbose) {
163 device_printf(dev, "chan_id=%d, priorities=%d\n",
164 sc->attr.chan_id, sc->attr.prior_num);
165 }
166
167 (void)DPAA2_CMD_CON_CLOSE(dev, child, DPAA2_CMD_TK(&cmd, con_token));
168 (void)DPAA2_CMD_RC_CLOSE(dev, child, DPAA2_CMD_TK(&cmd, rc_token));
169 return (0);
170
171 close_con:
172 DPAA2_CMD_CON_CLOSE(dev, child, DPAA2_CMD_TK(&cmd, con_token));
173 close_rc:
174 DPAA2_CMD_RC_CLOSE(dev, child, DPAA2_CMD_TK(&cmd, rc_token));
175 err_exit:
176 return (ENXIO);
177 }
178
179 static device_method_t dpaa2_con_methods[] = {
180 /* Device interface */
181 DEVMETHOD(device_probe, dpaa2_con_probe),
182 DEVMETHOD(device_attach, dpaa2_con_attach),
183 DEVMETHOD(device_detach, dpaa2_con_detach),
184
185 DEVMETHOD_END
186 };
187
188 static driver_t dpaa2_con_driver = {
189 "dpaa2_con",
190 dpaa2_con_methods,
191 sizeof(struct dpaa2_con_softc),
192 };
193
194 DRIVER_MODULE(dpaa2_con, dpaa2_rc, dpaa2_con_driver, 0, 0);
195