1/*
2 * Copyright (C) 2011-2014 Luigi Rizzo. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 */
25
26/*
| 1/*
2 * Copyright (C) 2011-2014 Luigi Rizzo. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 */
25
26/*
|
27 * $FreeBSD: head/sys/dev/netmap/if_re_netmap.h 270063 2014-08-16 15:00:01Z luigi $
| 27 * $FreeBSD: head/sys/dev/netmap/if_re_netmap.h 271849 2014-09-19 03:51:26Z glebius $
|
28 *
29 * netmap support for: re
30 *
31 * For more details on netmap support please see ixgbe_netmap.h
32 */
33
34
35#include <net/netmap.h>
36#include <sys/selinfo.h>
37#include <vm/vm.h>
38#include <vm/pmap.h> /* vtophys ? */
39#include <dev/netmap/netmap_kern.h>
40
41
42/*
43 * Register/unregister. We are already under netmap lock.
44 */
45static int
46re_netmap_reg(struct netmap_adapter *na, int onoff)
47{
48 struct ifnet *ifp = na->ifp;
49 struct rl_softc *adapter = ifp->if_softc;
50
51 RL_LOCK(adapter);
52 re_stop(adapter); /* also clears IFF_DRV_RUNNING */
53 if (onoff) {
54 nm_set_native_flags(na);
55 } else {
56 nm_clear_native_flags(na);
57 }
58 re_init_locked(adapter); /* also enables intr */
59 RL_UNLOCK(adapter);
60 return (ifp->if_drv_flags & IFF_DRV_RUNNING ? 0 : 1);
61}
62
63
64/*
65 * Reconcile kernel and user view of the transmit ring.
66 */
67static int
68re_netmap_txsync(struct netmap_kring *kring, int flags)
69{
70 struct netmap_adapter *na = kring->na;
71 struct ifnet *ifp = na->ifp;
72 struct netmap_ring *ring = kring->ring;
73 u_int nm_i; /* index into the netmap ring */
74 u_int nic_i; /* index into the NIC ring */
75 u_int n;
76 u_int const lim = kring->nkr_num_slots - 1;
77 u_int const head = kring->rhead;
78
79 /* device-specific */
80 struct rl_softc *sc = ifp->if_softc;
81 struct rl_txdesc *txd = sc->rl_ldata.rl_tx_desc;
82
83 bus_dmamap_sync(sc->rl_ldata.rl_tx_list_tag,
84 sc->rl_ldata.rl_tx_list_map,
85 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); // XXX extra postwrite ?
86
87 /*
88 * First part: process new packets to send.
89 */
90 nm_i = kring->nr_hwcur;
91 if (nm_i != head) { /* we have new packets to send */
92 nic_i = sc->rl_ldata.rl_tx_prodidx;
93 // XXX or netmap_idx_k2n(kring, nm_i);
94
95 for (n = 0; nm_i != head; n++) {
96 struct netmap_slot *slot = &ring->slot[nm_i];
97 u_int len = slot->len;
98 uint64_t paddr;
99 void *addr = PNMB(na, slot, &paddr);
100
101 /* device-specific */
102 struct rl_desc *desc = &sc->rl_ldata.rl_tx_list[nic_i];
103 int cmd = slot->len | RL_TDESC_CMD_EOF |
104 RL_TDESC_CMD_OWN | RL_TDESC_CMD_SOF ;
105
106 NM_CHECK_ADDR_LEN(na, addr, len);
107
108 if (nic_i == lim) /* mark end of ring */
109 cmd |= RL_TDESC_CMD_EOR;
110
111 if (slot->flags & NS_BUF_CHANGED) {
112 /* buffer has changed, reload map */
113 desc->rl_bufaddr_lo = htole32(RL_ADDR_LO(paddr));
114 desc->rl_bufaddr_hi = htole32(RL_ADDR_HI(paddr));
115 netmap_reload_map(na, sc->rl_ldata.rl_tx_mtag,
116 txd[nic_i].tx_dmamap, addr);
117 }
118 slot->flags &= ~(NS_REPORT | NS_BUF_CHANGED);
119
120 /* Fill the slot in the NIC ring. */
121 desc->rl_cmdstat = htole32(cmd);
122
123 /* make sure changes to the buffer are synced */
124 bus_dmamap_sync(sc->rl_ldata.rl_tx_mtag,
125 txd[nic_i].tx_dmamap,
126 BUS_DMASYNC_PREWRITE);
127
128 nm_i = nm_next(nm_i, lim);
129 nic_i = nm_next(nic_i, lim);
130 }
131 sc->rl_ldata.rl_tx_prodidx = nic_i;
132 kring->nr_hwcur = head;
133
134 /* synchronize the NIC ring */
135 bus_dmamap_sync(sc->rl_ldata.rl_tx_list_tag,
136 sc->rl_ldata.rl_tx_list_map,
137 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
138
139 /* start ? */
140 CSR_WRITE_1(sc, sc->rl_txstart, RL_TXSTART_START);
141 }
142
143 /*
144 * Second part: reclaim buffers for completed transmissions.
145 */
146 if (flags & NAF_FORCE_RECLAIM || nm_kr_txempty(kring)) {
147 nic_i = sc->rl_ldata.rl_tx_considx;
148 for (n = 0; nic_i != sc->rl_ldata.rl_tx_prodidx;
149 n++, nic_i = RL_TX_DESC_NXT(sc, nic_i)) {
150 uint32_t cmdstat =
151 le32toh(sc->rl_ldata.rl_tx_list[nic_i].rl_cmdstat);
152 if (cmdstat & RL_TDESC_STAT_OWN)
153 break;
154 }
155 if (n > 0) {
156 sc->rl_ldata.rl_tx_considx = nic_i;
157 sc->rl_ldata.rl_tx_free += n;
158 kring->nr_hwtail = nm_prev(netmap_idx_n2k(kring, nic_i), lim);
159 }
160 }
161
162 nm_txsync_finalize(kring);
163
164 return 0;
165}
166
167
168/*
169 * Reconcile kernel and user view of the receive ring.
170 */
171static int
172re_netmap_rxsync(struct netmap_kring *kring, int flags)
173{
174 struct netmap_adapter *na = kring->na;
175 struct ifnet *ifp = na->ifp;
176 struct netmap_ring *ring = kring->ring;
177 u_int nm_i; /* index into the netmap ring */
178 u_int nic_i; /* index into the NIC ring */
179 u_int n;
180 u_int const lim = kring->nkr_num_slots - 1;
181 u_int const head = nm_rxsync_prologue(kring);
182 int force_update = (flags & NAF_FORCE_READ) || kring->nr_kflags & NKR_PENDINTR;
183
184 /* device-specific */
185 struct rl_softc *sc = ifp->if_softc;
186 struct rl_rxdesc *rxd = sc->rl_ldata.rl_rx_desc;
187
188 if (head > lim)
189 return netmap_ring_reinit(kring);
190
191 bus_dmamap_sync(sc->rl_ldata.rl_rx_list_tag,
192 sc->rl_ldata.rl_rx_list_map,
193 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
194
195 /*
196 * First part: import newly received packets.
197 *
198 * This device uses all the buffers in the ring, so we need
199 * another termination condition in addition to RL_RDESC_STAT_OWN
200 * cleared (all buffers could have it cleared). The easiest one
201 * is to stop right before nm_hwcur.
202 */
203 if (netmap_no_pendintr || force_update) {
204 uint16_t slot_flags = kring->nkr_slot_flags;
205 uint32_t stop_i = nm_prev(kring->nr_hwcur, lim);
206
207 nic_i = sc->rl_ldata.rl_rx_prodidx; /* next pkt to check */
208 nm_i = netmap_idx_n2k(kring, nic_i);
209
210 while (nm_i != stop_i) {
211 struct rl_desc *cur_rx = &sc->rl_ldata.rl_rx_list[nic_i];
212 uint32_t rxstat = le32toh(cur_rx->rl_cmdstat);
213 uint32_t total_len;
214
215 if ((rxstat & RL_RDESC_STAT_OWN) != 0)
216 break;
217 total_len = rxstat & sc->rl_rxlenmask;
218 /* XXX subtract crc */
219 total_len = (total_len < 4) ? 0 : total_len - 4;
220 ring->slot[nm_i].len = total_len;
221 ring->slot[nm_i].flags = slot_flags;
222 /* sync was in re_newbuf() */
223 bus_dmamap_sync(sc->rl_ldata.rl_rx_mtag,
224 rxd[nic_i].rx_dmamap, BUS_DMASYNC_POSTREAD);
| 28 *
29 * netmap support for: re
30 *
31 * For more details on netmap support please see ixgbe_netmap.h
32 */
33
34
35#include <net/netmap.h>
36#include <sys/selinfo.h>
37#include <vm/vm.h>
38#include <vm/pmap.h> /* vtophys ? */
39#include <dev/netmap/netmap_kern.h>
40
41
42/*
43 * Register/unregister. We are already under netmap lock.
44 */
45static int
46re_netmap_reg(struct netmap_adapter *na, int onoff)
47{
48 struct ifnet *ifp = na->ifp;
49 struct rl_softc *adapter = ifp->if_softc;
50
51 RL_LOCK(adapter);
52 re_stop(adapter); /* also clears IFF_DRV_RUNNING */
53 if (onoff) {
54 nm_set_native_flags(na);
55 } else {
56 nm_clear_native_flags(na);
57 }
58 re_init_locked(adapter); /* also enables intr */
59 RL_UNLOCK(adapter);
60 return (ifp->if_drv_flags & IFF_DRV_RUNNING ? 0 : 1);
61}
62
63
64/*
65 * Reconcile kernel and user view of the transmit ring.
66 */
67static int
68re_netmap_txsync(struct netmap_kring *kring, int flags)
69{
70 struct netmap_adapter *na = kring->na;
71 struct ifnet *ifp = na->ifp;
72 struct netmap_ring *ring = kring->ring;
73 u_int nm_i; /* index into the netmap ring */
74 u_int nic_i; /* index into the NIC ring */
75 u_int n;
76 u_int const lim = kring->nkr_num_slots - 1;
77 u_int const head = kring->rhead;
78
79 /* device-specific */
80 struct rl_softc *sc = ifp->if_softc;
81 struct rl_txdesc *txd = sc->rl_ldata.rl_tx_desc;
82
83 bus_dmamap_sync(sc->rl_ldata.rl_tx_list_tag,
84 sc->rl_ldata.rl_tx_list_map,
85 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); // XXX extra postwrite ?
86
87 /*
88 * First part: process new packets to send.
89 */
90 nm_i = kring->nr_hwcur;
91 if (nm_i != head) { /* we have new packets to send */
92 nic_i = sc->rl_ldata.rl_tx_prodidx;
93 // XXX or netmap_idx_k2n(kring, nm_i);
94
95 for (n = 0; nm_i != head; n++) {
96 struct netmap_slot *slot = &ring->slot[nm_i];
97 u_int len = slot->len;
98 uint64_t paddr;
99 void *addr = PNMB(na, slot, &paddr);
100
101 /* device-specific */
102 struct rl_desc *desc = &sc->rl_ldata.rl_tx_list[nic_i];
103 int cmd = slot->len | RL_TDESC_CMD_EOF |
104 RL_TDESC_CMD_OWN | RL_TDESC_CMD_SOF ;
105
106 NM_CHECK_ADDR_LEN(na, addr, len);
107
108 if (nic_i == lim) /* mark end of ring */
109 cmd |= RL_TDESC_CMD_EOR;
110
111 if (slot->flags & NS_BUF_CHANGED) {
112 /* buffer has changed, reload map */
113 desc->rl_bufaddr_lo = htole32(RL_ADDR_LO(paddr));
114 desc->rl_bufaddr_hi = htole32(RL_ADDR_HI(paddr));
115 netmap_reload_map(na, sc->rl_ldata.rl_tx_mtag,
116 txd[nic_i].tx_dmamap, addr);
117 }
118 slot->flags &= ~(NS_REPORT | NS_BUF_CHANGED);
119
120 /* Fill the slot in the NIC ring. */
121 desc->rl_cmdstat = htole32(cmd);
122
123 /* make sure changes to the buffer are synced */
124 bus_dmamap_sync(sc->rl_ldata.rl_tx_mtag,
125 txd[nic_i].tx_dmamap,
126 BUS_DMASYNC_PREWRITE);
127
128 nm_i = nm_next(nm_i, lim);
129 nic_i = nm_next(nic_i, lim);
130 }
131 sc->rl_ldata.rl_tx_prodidx = nic_i;
132 kring->nr_hwcur = head;
133
134 /* synchronize the NIC ring */
135 bus_dmamap_sync(sc->rl_ldata.rl_tx_list_tag,
136 sc->rl_ldata.rl_tx_list_map,
137 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
138
139 /* start ? */
140 CSR_WRITE_1(sc, sc->rl_txstart, RL_TXSTART_START);
141 }
142
143 /*
144 * Second part: reclaim buffers for completed transmissions.
145 */
146 if (flags & NAF_FORCE_RECLAIM || nm_kr_txempty(kring)) {
147 nic_i = sc->rl_ldata.rl_tx_considx;
148 for (n = 0; nic_i != sc->rl_ldata.rl_tx_prodidx;
149 n++, nic_i = RL_TX_DESC_NXT(sc, nic_i)) {
150 uint32_t cmdstat =
151 le32toh(sc->rl_ldata.rl_tx_list[nic_i].rl_cmdstat);
152 if (cmdstat & RL_TDESC_STAT_OWN)
153 break;
154 }
155 if (n > 0) {
156 sc->rl_ldata.rl_tx_considx = nic_i;
157 sc->rl_ldata.rl_tx_free += n;
158 kring->nr_hwtail = nm_prev(netmap_idx_n2k(kring, nic_i), lim);
159 }
160 }
161
162 nm_txsync_finalize(kring);
163
164 return 0;
165}
166
167
168/*
169 * Reconcile kernel and user view of the receive ring.
170 */
171static int
172re_netmap_rxsync(struct netmap_kring *kring, int flags)
173{
174 struct netmap_adapter *na = kring->na;
175 struct ifnet *ifp = na->ifp;
176 struct netmap_ring *ring = kring->ring;
177 u_int nm_i; /* index into the netmap ring */
178 u_int nic_i; /* index into the NIC ring */
179 u_int n;
180 u_int const lim = kring->nkr_num_slots - 1;
181 u_int const head = nm_rxsync_prologue(kring);
182 int force_update = (flags & NAF_FORCE_READ) || kring->nr_kflags & NKR_PENDINTR;
183
184 /* device-specific */
185 struct rl_softc *sc = ifp->if_softc;
186 struct rl_rxdesc *rxd = sc->rl_ldata.rl_rx_desc;
187
188 if (head > lim)
189 return netmap_ring_reinit(kring);
190
191 bus_dmamap_sync(sc->rl_ldata.rl_rx_list_tag,
192 sc->rl_ldata.rl_rx_list_map,
193 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
194
195 /*
196 * First part: import newly received packets.
197 *
198 * This device uses all the buffers in the ring, so we need
199 * another termination condition in addition to RL_RDESC_STAT_OWN
200 * cleared (all buffers could have it cleared). The easiest one
201 * is to stop right before nm_hwcur.
202 */
203 if (netmap_no_pendintr || force_update) {
204 uint16_t slot_flags = kring->nkr_slot_flags;
205 uint32_t stop_i = nm_prev(kring->nr_hwcur, lim);
206
207 nic_i = sc->rl_ldata.rl_rx_prodidx; /* next pkt to check */
208 nm_i = netmap_idx_n2k(kring, nic_i);
209
210 while (nm_i != stop_i) {
211 struct rl_desc *cur_rx = &sc->rl_ldata.rl_rx_list[nic_i];
212 uint32_t rxstat = le32toh(cur_rx->rl_cmdstat);
213 uint32_t total_len;
214
215 if ((rxstat & RL_RDESC_STAT_OWN) != 0)
216 break;
217 total_len = rxstat & sc->rl_rxlenmask;
218 /* XXX subtract crc */
219 total_len = (total_len < 4) ? 0 : total_len - 4;
220 ring->slot[nm_i].len = total_len;
221 ring->slot[nm_i].flags = slot_flags;
222 /* sync was in re_newbuf() */
223 bus_dmamap_sync(sc->rl_ldata.rl_rx_mtag,
224 rxd[nic_i].rx_dmamap, BUS_DMASYNC_POSTREAD);
|
225 // sc->rl_ifp->if_ipackets++;
| 225 // if_inc_counter(sc->rl_ifp, IFCOUNTER_IPACKETS, 1);
|
226 nm_i = nm_next(nm_i, lim);
227 nic_i = nm_next(nic_i, lim);
228 }
229 sc->rl_ldata.rl_rx_prodidx = nic_i;
230 kring->nr_hwtail = nm_i;
231 kring->nr_kflags &= ~NKR_PENDINTR;
232 }
233
234 /*
235 * Second part: skip past packets that userspace has released.
236 */
237 nm_i = kring->nr_hwcur;
238 if (nm_i != head) {
239 nic_i = netmap_idx_k2n(kring, nm_i);
240 for (n = 0; nm_i != head; n++) {
241 struct netmap_slot *slot = &ring->slot[nm_i];
242 uint64_t paddr;
243 void *addr = PNMB(na, slot, &paddr);
244
245 struct rl_desc *desc = &sc->rl_ldata.rl_rx_list[nic_i];
246 int cmd = NETMAP_BUF_SIZE(na) | RL_RDESC_CMD_OWN;
247
248 if (addr == NETMAP_BUF_BASE(na)) /* bad buf */
249 goto ring_reset;
250
251 if (nic_i == lim) /* mark end of ring */
252 cmd |= RL_RDESC_CMD_EOR;
253
254 if (slot->flags & NS_BUF_CHANGED) {
255 /* buffer has changed, reload map */
256 desc->rl_bufaddr_lo = htole32(RL_ADDR_LO(paddr));
257 desc->rl_bufaddr_hi = htole32(RL_ADDR_HI(paddr));
258 netmap_reload_map(na, sc->rl_ldata.rl_rx_mtag,
259 rxd[nic_i].rx_dmamap, addr);
260 slot->flags &= ~NS_BUF_CHANGED;
261 }
262 desc->rl_cmdstat = htole32(cmd);
263 bus_dmamap_sync(sc->rl_ldata.rl_rx_mtag,
264 rxd[nic_i].rx_dmamap,
265 BUS_DMASYNC_PREREAD);
266 nm_i = nm_next(nm_i, lim);
267 nic_i = nm_next(nic_i, lim);
268 }
269 kring->nr_hwcur = head;
270
271 bus_dmamap_sync(sc->rl_ldata.rl_rx_list_tag,
272 sc->rl_ldata.rl_rx_list_map,
273 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
274 }
275
276 /* tell userspace that there might be new packets */
277 nm_rxsync_finalize(kring);
278
279 return 0;
280
281ring_reset:
282 return netmap_ring_reinit(kring);
283}
284
285
286/*
287 * Additional routines to init the tx and rx rings.
288 * In other drivers we do that inline in the main code.
289 */
290static void
291re_netmap_tx_init(struct rl_softc *sc)
292{
293 struct rl_txdesc *txd;
294 struct rl_desc *desc;
295 int i, n;
296 struct netmap_adapter *na = NA(sc->rl_ifp);
297 struct netmap_slot *slot;
298
299 slot = netmap_reset(na, NR_TX, 0, 0);
300 /* slot is NULL if we are not in native netmap mode */
301 if (!slot)
302 return;
303 /* in netmap mode, overwrite addresses and maps */
304 txd = sc->rl_ldata.rl_tx_desc;
305 desc = sc->rl_ldata.rl_tx_list;
306 n = sc->rl_ldata.rl_tx_desc_cnt;
307
308 /* l points in the netmap ring, i points in the NIC ring */
309 for (i = 0; i < n; i++) {
310 uint64_t paddr;
311 int l = netmap_idx_n2k(&na->tx_rings[0], i);
312 void *addr = PNMB(na, slot + l, &paddr);
313
314 desc[i].rl_bufaddr_lo = htole32(RL_ADDR_LO(paddr));
315 desc[i].rl_bufaddr_hi = htole32(RL_ADDR_HI(paddr));
316 netmap_load_map(na, sc->rl_ldata.rl_tx_mtag,
317 txd[i].tx_dmamap, addr);
318 }
319}
320
321static void
322re_netmap_rx_init(struct rl_softc *sc)
323{
324 struct netmap_adapter *na = NA(sc->rl_ifp);
325 struct netmap_slot *slot = netmap_reset(na, NR_RX, 0, 0);
326 struct rl_desc *desc = sc->rl_ldata.rl_rx_list;
327 uint32_t cmdstat;
328 uint32_t nic_i, max_avail;
329 uint32_t const n = sc->rl_ldata.rl_rx_desc_cnt;
330
331 if (!slot)
332 return;
333 /*
334 * Do not release the slots owned by userspace,
335 * and also keep one empty.
336 */
337 max_avail = n - 1 - nm_kr_rxspace(&na->rx_rings[0]);
338 for (nic_i = 0; nic_i < n; nic_i++) {
339 void *addr;
340 uint64_t paddr;
341 uint32_t nm_i = netmap_idx_n2k(&na->rx_rings[0], nic_i);
342
343 addr = PNMB(na, slot + nm_i, &paddr);
344
345 netmap_reload_map(na, sc->rl_ldata.rl_rx_mtag,
346 sc->rl_ldata.rl_rx_desc[nic_i].rx_dmamap, addr);
347 bus_dmamap_sync(sc->rl_ldata.rl_rx_mtag,
348 sc->rl_ldata.rl_rx_desc[nic_i].rx_dmamap, BUS_DMASYNC_PREREAD);
349 desc[nic_i].rl_bufaddr_lo = htole32(RL_ADDR_LO(paddr));
350 desc[nic_i].rl_bufaddr_hi = htole32(RL_ADDR_HI(paddr));
351 cmdstat = NETMAP_BUF_SIZE(na);
352 if (nic_i == n - 1) /* mark the end of ring */
353 cmdstat |= RL_RDESC_CMD_EOR;
354 if (nic_i < max_avail)
355 cmdstat |= RL_RDESC_CMD_OWN;
356 desc[nic_i].rl_cmdstat = htole32(cmdstat);
357 }
358}
359
360
361static void
362re_netmap_attach(struct rl_softc *sc)
363{
364 struct netmap_adapter na;
365
366 bzero(&na, sizeof(na));
367
368 na.ifp = sc->rl_ifp;
369 na.na_flags = NAF_BDG_MAYSLEEP;
370 na.num_tx_desc = sc->rl_ldata.rl_tx_desc_cnt;
371 na.num_rx_desc = sc->rl_ldata.rl_rx_desc_cnt;
372 na.nm_txsync = re_netmap_txsync;
373 na.nm_rxsync = re_netmap_rxsync;
374 na.nm_register = re_netmap_reg;
375 na.num_tx_rings = na.num_rx_rings = 1;
376 netmap_attach(&na);
377}
378
379/* end of file */
| 226 nm_i = nm_next(nm_i, lim);
227 nic_i = nm_next(nic_i, lim);
228 }
229 sc->rl_ldata.rl_rx_prodidx = nic_i;
230 kring->nr_hwtail = nm_i;
231 kring->nr_kflags &= ~NKR_PENDINTR;
232 }
233
234 /*
235 * Second part: skip past packets that userspace has released.
236 */
237 nm_i = kring->nr_hwcur;
238 if (nm_i != head) {
239 nic_i = netmap_idx_k2n(kring, nm_i);
240 for (n = 0; nm_i != head; n++) {
241 struct netmap_slot *slot = &ring->slot[nm_i];
242 uint64_t paddr;
243 void *addr = PNMB(na, slot, &paddr);
244
245 struct rl_desc *desc = &sc->rl_ldata.rl_rx_list[nic_i];
246 int cmd = NETMAP_BUF_SIZE(na) | RL_RDESC_CMD_OWN;
247
248 if (addr == NETMAP_BUF_BASE(na)) /* bad buf */
249 goto ring_reset;
250
251 if (nic_i == lim) /* mark end of ring */
252 cmd |= RL_RDESC_CMD_EOR;
253
254 if (slot->flags & NS_BUF_CHANGED) {
255 /* buffer has changed, reload map */
256 desc->rl_bufaddr_lo = htole32(RL_ADDR_LO(paddr));
257 desc->rl_bufaddr_hi = htole32(RL_ADDR_HI(paddr));
258 netmap_reload_map(na, sc->rl_ldata.rl_rx_mtag,
259 rxd[nic_i].rx_dmamap, addr);
260 slot->flags &= ~NS_BUF_CHANGED;
261 }
262 desc->rl_cmdstat = htole32(cmd);
263 bus_dmamap_sync(sc->rl_ldata.rl_rx_mtag,
264 rxd[nic_i].rx_dmamap,
265 BUS_DMASYNC_PREREAD);
266 nm_i = nm_next(nm_i, lim);
267 nic_i = nm_next(nic_i, lim);
268 }
269 kring->nr_hwcur = head;
270
271 bus_dmamap_sync(sc->rl_ldata.rl_rx_list_tag,
272 sc->rl_ldata.rl_rx_list_map,
273 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
274 }
275
276 /* tell userspace that there might be new packets */
277 nm_rxsync_finalize(kring);
278
279 return 0;
280
281ring_reset:
282 return netmap_ring_reinit(kring);
283}
284
285
286/*
287 * Additional routines to init the tx and rx rings.
288 * In other drivers we do that inline in the main code.
289 */
290static void
291re_netmap_tx_init(struct rl_softc *sc)
292{
293 struct rl_txdesc *txd;
294 struct rl_desc *desc;
295 int i, n;
296 struct netmap_adapter *na = NA(sc->rl_ifp);
297 struct netmap_slot *slot;
298
299 slot = netmap_reset(na, NR_TX, 0, 0);
300 /* slot is NULL if we are not in native netmap mode */
301 if (!slot)
302 return;
303 /* in netmap mode, overwrite addresses and maps */
304 txd = sc->rl_ldata.rl_tx_desc;
305 desc = sc->rl_ldata.rl_tx_list;
306 n = sc->rl_ldata.rl_tx_desc_cnt;
307
308 /* l points in the netmap ring, i points in the NIC ring */
309 for (i = 0; i < n; i++) {
310 uint64_t paddr;
311 int l = netmap_idx_n2k(&na->tx_rings[0], i);
312 void *addr = PNMB(na, slot + l, &paddr);
313
314 desc[i].rl_bufaddr_lo = htole32(RL_ADDR_LO(paddr));
315 desc[i].rl_bufaddr_hi = htole32(RL_ADDR_HI(paddr));
316 netmap_load_map(na, sc->rl_ldata.rl_tx_mtag,
317 txd[i].tx_dmamap, addr);
318 }
319}
320
321static void
322re_netmap_rx_init(struct rl_softc *sc)
323{
324 struct netmap_adapter *na = NA(sc->rl_ifp);
325 struct netmap_slot *slot = netmap_reset(na, NR_RX, 0, 0);
326 struct rl_desc *desc = sc->rl_ldata.rl_rx_list;
327 uint32_t cmdstat;
328 uint32_t nic_i, max_avail;
329 uint32_t const n = sc->rl_ldata.rl_rx_desc_cnt;
330
331 if (!slot)
332 return;
333 /*
334 * Do not release the slots owned by userspace,
335 * and also keep one empty.
336 */
337 max_avail = n - 1 - nm_kr_rxspace(&na->rx_rings[0]);
338 for (nic_i = 0; nic_i < n; nic_i++) {
339 void *addr;
340 uint64_t paddr;
341 uint32_t nm_i = netmap_idx_n2k(&na->rx_rings[0], nic_i);
342
343 addr = PNMB(na, slot + nm_i, &paddr);
344
345 netmap_reload_map(na, sc->rl_ldata.rl_rx_mtag,
346 sc->rl_ldata.rl_rx_desc[nic_i].rx_dmamap, addr);
347 bus_dmamap_sync(sc->rl_ldata.rl_rx_mtag,
348 sc->rl_ldata.rl_rx_desc[nic_i].rx_dmamap, BUS_DMASYNC_PREREAD);
349 desc[nic_i].rl_bufaddr_lo = htole32(RL_ADDR_LO(paddr));
350 desc[nic_i].rl_bufaddr_hi = htole32(RL_ADDR_HI(paddr));
351 cmdstat = NETMAP_BUF_SIZE(na);
352 if (nic_i == n - 1) /* mark the end of ring */
353 cmdstat |= RL_RDESC_CMD_EOR;
354 if (nic_i < max_avail)
355 cmdstat |= RL_RDESC_CMD_OWN;
356 desc[nic_i].rl_cmdstat = htole32(cmdstat);
357 }
358}
359
360
361static void
362re_netmap_attach(struct rl_softc *sc)
363{
364 struct netmap_adapter na;
365
366 bzero(&na, sizeof(na));
367
368 na.ifp = sc->rl_ifp;
369 na.na_flags = NAF_BDG_MAYSLEEP;
370 na.num_tx_desc = sc->rl_ldata.rl_tx_desc_cnt;
371 na.num_rx_desc = sc->rl_ldata.rl_rx_desc_cnt;
372 na.nm_txsync = re_netmap_txsync;
373 na.nm_rxsync = re_netmap_rxsync;
374 na.nm_register = re_netmap_reg;
375 na.num_tx_rings = na.num_rx_rings = 1;
376 netmap_attach(&na);
377}
378
379/* end of file */
|