root / hw / xen_nic.c @ 5414dec6
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1 | e613b064 | aliguori | /*
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2 | e613b064 | aliguori | * xen paravirt network card backend
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3 | e613b064 | aliguori | *
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4 | e613b064 | aliguori | * (c) Gerd Hoffmann <kraxel@redhat.com>
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5 | e613b064 | aliguori | *
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6 | e613b064 | aliguori | * This program is free software; you can redistribute it and/or modify
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7 | e613b064 | aliguori | * it under the terms of the GNU General Public License as published by
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8 | e613b064 | aliguori | * the Free Software Foundation; under version 2 of the License.
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9 | e613b064 | aliguori | *
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10 | e613b064 | aliguori | * This program is distributed in the hope that it will be useful,
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11 | e613b064 | aliguori | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 | e613b064 | aliguori | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 | e613b064 | aliguori | * GNU General Public License for more details.
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14 | e613b064 | aliguori | *
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15 | e613b064 | aliguori | * You should have received a copy of the GNU General Public License along
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16 | 8167ee88 | Blue Swirl | * with this program; if not, see <http://www.gnu.org/licenses/>.
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17 | 6b620ca3 | Paolo Bonzini | *
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18 | 6b620ca3 | Paolo Bonzini | * Contributions after 2012-01-13 are licensed under the terms of the
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19 | 6b620ca3 | Paolo Bonzini | * GNU GPL, version 2 or (at your option) any later version.
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20 | e613b064 | aliguori | */
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21 | e613b064 | aliguori | |
22 | e613b064 | aliguori | #include <stdio.h> |
23 | e613b064 | aliguori | #include <stdlib.h> |
24 | e613b064 | aliguori | #include <stdarg.h> |
25 | e613b064 | aliguori | #include <string.h> |
26 | e613b064 | aliguori | #include <unistd.h> |
27 | e613b064 | aliguori | #include <signal.h> |
28 | e613b064 | aliguori | #include <inttypes.h> |
29 | e613b064 | aliguori | #include <fcntl.h> |
30 | e613b064 | aliguori | #include <errno.h> |
31 | e613b064 | aliguori | #include <sys/socket.h> |
32 | e613b064 | aliguori | #include <sys/ioctl.h> |
33 | e613b064 | aliguori | #include <sys/types.h> |
34 | e613b064 | aliguori | #include <sys/stat.h> |
35 | e613b064 | aliguori | #include <sys/mman.h> |
36 | e613b064 | aliguori | #include <sys/wait.h> |
37 | e613b064 | aliguori | |
38 | e613b064 | aliguori | #include <xs.h> |
39 | e613b064 | aliguori | #include <xenctrl.h> |
40 | e613b064 | aliguori | #include <xen/io/xenbus.h> |
41 | e613b064 | aliguori | #include <xen/io/netif.h> |
42 | e613b064 | aliguori | |
43 | e613b064 | aliguori | #include "hw.h" |
44 | e613b064 | aliguori | #include "net.h" |
45 | 7200ac3c | Mark McLoughlin | #include "net/checksum.h" |
46 | 658788c5 | Mark McLoughlin | #include "net/util.h" |
47 | e613b064 | aliguori | #include "qemu-char.h" |
48 | e613b064 | aliguori | #include "xen_backend.h" |
49 | e613b064 | aliguori | |
50 | e613b064 | aliguori | /* ------------------------------------------------------------- */
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51 | e613b064 | aliguori | |
52 | e613b064 | aliguori | struct XenNetDev {
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53 | e613b064 | aliguori | struct XenDevice xendev; /* must be first */ |
54 | e613b064 | aliguori | char *mac;
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55 | e613b064 | aliguori | int tx_work;
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56 | e613b064 | aliguori | int tx_ring_ref;
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57 | e613b064 | aliguori | int rx_ring_ref;
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58 | e613b064 | aliguori | struct netif_tx_sring *txs;
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59 | e613b064 | aliguori | struct netif_rx_sring *rxs;
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60 | e613b064 | aliguori | netif_tx_back_ring_t tx_ring; |
61 | e613b064 | aliguori | netif_rx_back_ring_t rx_ring; |
62 | 658788c5 | Mark McLoughlin | NICConf conf; |
63 | 658788c5 | Mark McLoughlin | NICState *nic; |
64 | e613b064 | aliguori | }; |
65 | e613b064 | aliguori | |
66 | e613b064 | aliguori | /* ------------------------------------------------------------- */
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67 | e613b064 | aliguori | |
68 | e613b064 | aliguori | static void net_tx_response(struct XenNetDev *netdev, netif_tx_request_t *txp, int8_t st) |
69 | e613b064 | aliguori | { |
70 | e613b064 | aliguori | RING_IDX i = netdev->tx_ring.rsp_prod_pvt; |
71 | e613b064 | aliguori | netif_tx_response_t *resp; |
72 | e613b064 | aliguori | int notify;
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73 | e613b064 | aliguori | |
74 | e613b064 | aliguori | resp = RING_GET_RESPONSE(&netdev->tx_ring, i); |
75 | e613b064 | aliguori | resp->id = txp->id; |
76 | e613b064 | aliguori | resp->status = st; |
77 | e613b064 | aliguori | |
78 | e613b064 | aliguori | #if 0
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79 | 209cd7ab | Anthony PERARD | if (txp->flags & NETTXF_extra_info) {
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80 | 209cd7ab | Anthony PERARD | RING_GET_RESPONSE(&netdev->tx_ring, ++i)->status = NETIF_RSP_NULL;
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81 | 209cd7ab | Anthony PERARD | }
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82 | e613b064 | aliguori | #endif
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83 | e613b064 | aliguori | |
84 | e613b064 | aliguori | netdev->tx_ring.rsp_prod_pvt = ++i; |
85 | e613b064 | aliguori | RING_PUSH_RESPONSES_AND_CHECK_NOTIFY(&netdev->tx_ring, notify); |
86 | 209cd7ab | Anthony PERARD | if (notify) {
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87 | 209cd7ab | Anthony PERARD | xen_be_send_notify(&netdev->xendev); |
88 | 209cd7ab | Anthony PERARD | } |
89 | e613b064 | aliguori | |
90 | e613b064 | aliguori | if (i == netdev->tx_ring.req_cons) {
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91 | 209cd7ab | Anthony PERARD | int more_to_do;
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92 | 209cd7ab | Anthony PERARD | RING_FINAL_CHECK_FOR_REQUESTS(&netdev->tx_ring, more_to_do); |
93 | 209cd7ab | Anthony PERARD | if (more_to_do) {
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94 | 209cd7ab | Anthony PERARD | netdev->tx_work++; |
95 | 209cd7ab | Anthony PERARD | } |
96 | e613b064 | aliguori | } |
97 | e613b064 | aliguori | } |
98 | e613b064 | aliguori | |
99 | e613b064 | aliguori | static void net_tx_error(struct XenNetDev *netdev, netif_tx_request_t *txp, RING_IDX end) |
100 | e613b064 | aliguori | { |
101 | e613b064 | aliguori | #if 0
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102 | e613b064 | aliguori | /*
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103 | e613b064 | aliguori | * Hmm, why netback fails everything in the ring?
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104 | e613b064 | aliguori | * Should we do that even when not supporting SG and TSO?
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105 | e613b064 | aliguori | */
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106 | e613b064 | aliguori | RING_IDX cons = netdev->tx_ring.req_cons;
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107 | e613b064 | aliguori | |
108 | e613b064 | aliguori | do {
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109 | 209cd7ab | Anthony PERARD | make_tx_response(netif, txp, NETIF_RSP_ERROR);
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110 | 209cd7ab | Anthony PERARD | if (cons >= end) {
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111 | 209cd7ab | Anthony PERARD | break;
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112 | 209cd7ab | Anthony PERARD | }
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113 | 209cd7ab | Anthony PERARD | txp = RING_GET_REQUEST(&netdev->tx_ring, cons++);
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114 | e613b064 | aliguori | } while (1);
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115 | e613b064 | aliguori | netdev->tx_ring.req_cons = cons;
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116 | e613b064 | aliguori | netif_schedule_work(netif);
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117 | e613b064 | aliguori | netif_put(netif);
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118 | e613b064 | aliguori | #else
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119 | e613b064 | aliguori | net_tx_response(netdev, txp, NETIF_RSP_ERROR); |
120 | e613b064 | aliguori | #endif
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121 | e613b064 | aliguori | } |
122 | e613b064 | aliguori | |
123 | e613b064 | aliguori | static void net_tx_packets(struct XenNetDev *netdev) |
124 | e613b064 | aliguori | { |
125 | e613b064 | aliguori | netif_tx_request_t txreq; |
126 | e613b064 | aliguori | RING_IDX rc, rp; |
127 | e613b064 | aliguori | void *page;
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128 | e613b064 | aliguori | void *tmpbuf = NULL; |
129 | e613b064 | aliguori | |
130 | e613b064 | aliguori | for (;;) {
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131 | 209cd7ab | Anthony PERARD | rc = netdev->tx_ring.req_cons; |
132 | 209cd7ab | Anthony PERARD | rp = netdev->tx_ring.sring->req_prod; |
133 | 209cd7ab | Anthony PERARD | xen_rmb(); /* Ensure we see queued requests up to 'rp'. */
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134 | e613b064 | aliguori | |
135 | 209cd7ab | Anthony PERARD | while ((rc != rp)) {
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136 | 209cd7ab | Anthony PERARD | if (RING_REQUEST_CONS_OVERFLOW(&netdev->tx_ring, rc)) {
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137 | 209cd7ab | Anthony PERARD | break;
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138 | 209cd7ab | Anthony PERARD | } |
139 | 209cd7ab | Anthony PERARD | memcpy(&txreq, RING_GET_REQUEST(&netdev->tx_ring, rc), sizeof(txreq));
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140 | 209cd7ab | Anthony PERARD | netdev->tx_ring.req_cons = ++rc; |
141 | e613b064 | aliguori | |
142 | e613b064 | aliguori | #if 1 |
143 | 209cd7ab | Anthony PERARD | /* should not happen in theory, we don't announce the *
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144 | 209cd7ab | Anthony PERARD | * feature-{sg,gso,whatelse} flags in xenstore (yet?) */
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145 | 209cd7ab | Anthony PERARD | if (txreq.flags & NETTXF_extra_info) {
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146 | 209cd7ab | Anthony PERARD | xen_be_printf(&netdev->xendev, 0, "FIXME: extra info flag\n"); |
147 | 209cd7ab | Anthony PERARD | net_tx_error(netdev, &txreq, rc); |
148 | 209cd7ab | Anthony PERARD | continue;
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149 | 209cd7ab | Anthony PERARD | } |
150 | 209cd7ab | Anthony PERARD | if (txreq.flags & NETTXF_more_data) {
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151 | 209cd7ab | Anthony PERARD | xen_be_printf(&netdev->xendev, 0, "FIXME: more data flag\n"); |
152 | 209cd7ab | Anthony PERARD | net_tx_error(netdev, &txreq, rc); |
153 | 209cd7ab | Anthony PERARD | continue;
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154 | 209cd7ab | Anthony PERARD | } |
155 | e613b064 | aliguori | #endif
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156 | e613b064 | aliguori | |
157 | 209cd7ab | Anthony PERARD | if (txreq.size < 14) { |
158 | 209cd7ab | Anthony PERARD | xen_be_printf(&netdev->xendev, 0, "bad packet size: %d\n", txreq.size); |
159 | 209cd7ab | Anthony PERARD | net_tx_error(netdev, &txreq, rc); |
160 | 209cd7ab | Anthony PERARD | continue;
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161 | 209cd7ab | Anthony PERARD | } |
162 | 209cd7ab | Anthony PERARD | |
163 | 209cd7ab | Anthony PERARD | if ((txreq.offset + txreq.size) > XC_PAGE_SIZE) {
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164 | 209cd7ab | Anthony PERARD | xen_be_printf(&netdev->xendev, 0, "error: page crossing\n"); |
165 | 209cd7ab | Anthony PERARD | net_tx_error(netdev, &txreq, rc); |
166 | 209cd7ab | Anthony PERARD | continue;
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167 | 209cd7ab | Anthony PERARD | } |
168 | 209cd7ab | Anthony PERARD | |
169 | 209cd7ab | Anthony PERARD | xen_be_printf(&netdev->xendev, 3, "tx packet ref %d, off %d, len %d, flags 0x%x%s%s%s%s\n", |
170 | 209cd7ab | Anthony PERARD | txreq.gref, txreq.offset, txreq.size, txreq.flags, |
171 | 209cd7ab | Anthony PERARD | (txreq.flags & NETTXF_csum_blank) ? " csum_blank" : "", |
172 | 209cd7ab | Anthony PERARD | (txreq.flags & NETTXF_data_validated) ? " data_validated" : "", |
173 | 209cd7ab | Anthony PERARD | (txreq.flags & NETTXF_more_data) ? " more_data" : "", |
174 | 209cd7ab | Anthony PERARD | (txreq.flags & NETTXF_extra_info) ? " extra_info" : ""); |
175 | 209cd7ab | Anthony PERARD | |
176 | 209cd7ab | Anthony PERARD | page = xc_gnttab_map_grant_ref(netdev->xendev.gnttabdev, |
177 | 209cd7ab | Anthony PERARD | netdev->xendev.dom, |
178 | 209cd7ab | Anthony PERARD | txreq.gref, PROT_READ); |
179 | 209cd7ab | Anthony PERARD | if (page == NULL) { |
180 | 209cd7ab | Anthony PERARD | xen_be_printf(&netdev->xendev, 0, "error: tx gref dereference failed (%d)\n", |
181 | e613b064 | aliguori | txreq.gref); |
182 | 209cd7ab | Anthony PERARD | net_tx_error(netdev, &txreq, rc); |
183 | 209cd7ab | Anthony PERARD | continue;
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184 | 209cd7ab | Anthony PERARD | } |
185 | 209cd7ab | Anthony PERARD | if (txreq.flags & NETTXF_csum_blank) {
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186 | e613b064 | aliguori | /* have read-only mapping -> can't fill checksum in-place */
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187 | 209cd7ab | Anthony PERARD | if (!tmpbuf) {
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188 | 7267c094 | Anthony Liguori | tmpbuf = g_malloc(XC_PAGE_SIZE); |
189 | 209cd7ab | Anthony PERARD | } |
190 | e613b064 | aliguori | memcpy(tmpbuf, page + txreq.offset, txreq.size); |
191 | 209cd7ab | Anthony PERARD | net_checksum_calculate(tmpbuf, txreq.size); |
192 | 658788c5 | Mark McLoughlin | qemu_send_packet(&netdev->nic->nc, tmpbuf, txreq.size); |
193 | e613b064 | aliguori | } else {
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194 | 658788c5 | Mark McLoughlin | qemu_send_packet(&netdev->nic->nc, page + txreq.offset, txreq.size); |
195 | e613b064 | aliguori | } |
196 | 209cd7ab | Anthony PERARD | xc_gnttab_munmap(netdev->xendev.gnttabdev, page, 1);
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197 | 209cd7ab | Anthony PERARD | net_tx_response(netdev, &txreq, NETIF_RSP_OKAY); |
198 | 209cd7ab | Anthony PERARD | } |
199 | 209cd7ab | Anthony PERARD | if (!netdev->tx_work) {
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200 | 209cd7ab | Anthony PERARD | break;
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201 | 209cd7ab | Anthony PERARD | } |
202 | 209cd7ab | Anthony PERARD | netdev->tx_work = 0;
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203 | e613b064 | aliguori | } |
204 | 7267c094 | Anthony Liguori | g_free(tmpbuf); |
205 | e613b064 | aliguori | } |
206 | e613b064 | aliguori | |
207 | e613b064 | aliguori | /* ------------------------------------------------------------- */
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208 | e613b064 | aliguori | |
209 | e613b064 | aliguori | static void net_rx_response(struct XenNetDev *netdev, |
210 | 209cd7ab | Anthony PERARD | netif_rx_request_t *req, int8_t st, |
211 | 209cd7ab | Anthony PERARD | uint16_t offset, uint16_t size, |
212 | 209cd7ab | Anthony PERARD | uint16_t flags) |
213 | e613b064 | aliguori | { |
214 | e613b064 | aliguori | RING_IDX i = netdev->rx_ring.rsp_prod_pvt; |
215 | e613b064 | aliguori | netif_rx_response_t *resp; |
216 | e613b064 | aliguori | int notify;
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217 | e613b064 | aliguori | |
218 | e613b064 | aliguori | resp = RING_GET_RESPONSE(&netdev->rx_ring, i); |
219 | e613b064 | aliguori | resp->offset = offset; |
220 | e613b064 | aliguori | resp->flags = flags; |
221 | e613b064 | aliguori | resp->id = req->id; |
222 | e613b064 | aliguori | resp->status = (int16_t)size; |
223 | 209cd7ab | Anthony PERARD | if (st < 0) { |
224 | 209cd7ab | Anthony PERARD | resp->status = (int16_t)st; |
225 | 209cd7ab | Anthony PERARD | } |
226 | e613b064 | aliguori | |
227 | e613b064 | aliguori | xen_be_printf(&netdev->xendev, 3, "rx response: idx %d, status %d, flags 0x%x\n", |
228 | 209cd7ab | Anthony PERARD | i, resp->status, resp->flags); |
229 | e613b064 | aliguori | |
230 | e613b064 | aliguori | netdev->rx_ring.rsp_prod_pvt = ++i; |
231 | e613b064 | aliguori | RING_PUSH_RESPONSES_AND_CHECK_NOTIFY(&netdev->rx_ring, notify); |
232 | 209cd7ab | Anthony PERARD | if (notify) {
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233 | 209cd7ab | Anthony PERARD | xen_be_send_notify(&netdev->xendev); |
234 | 209cd7ab | Anthony PERARD | } |
235 | e613b064 | aliguori | } |
236 | e613b064 | aliguori | |
237 | e613b064 | aliguori | #define NET_IP_ALIGN 2 |
238 | e613b064 | aliguori | |
239 | 658788c5 | Mark McLoughlin | static int net_rx_ok(VLANClientState *nc) |
240 | e613b064 | aliguori | { |
241 | 658788c5 | Mark McLoughlin | struct XenNetDev *netdev = DO_UPCAST(NICState, nc, nc)->opaque;
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242 | e613b064 | aliguori | RING_IDX rc, rp; |
243 | e613b064 | aliguori | |
244 | 209cd7ab | Anthony PERARD | if (netdev->xendev.be_state != XenbusStateConnected) {
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245 | 209cd7ab | Anthony PERARD | return 0; |
246 | 209cd7ab | Anthony PERARD | } |
247 | e613b064 | aliguori | |
248 | e613b064 | aliguori | rc = netdev->rx_ring.req_cons; |
249 | e613b064 | aliguori | rp = netdev->rx_ring.sring->req_prod; |
250 | e613b064 | aliguori | xen_rmb(); |
251 | e613b064 | aliguori | |
252 | e613b064 | aliguori | if (rc == rp || RING_REQUEST_CONS_OVERFLOW(&netdev->rx_ring, rc)) {
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253 | 209cd7ab | Anthony PERARD | xen_be_printf(&netdev->xendev, 2, "%s: no rx buffers (%d/%d)\n", |
254 | 209cd7ab | Anthony PERARD | __FUNCTION__, rc, rp); |
255 | 209cd7ab | Anthony PERARD | return 0; |
256 | e613b064 | aliguori | } |
257 | e613b064 | aliguori | return 1; |
258 | e613b064 | aliguori | } |
259 | e613b064 | aliguori | |
260 | 658788c5 | Mark McLoughlin | static ssize_t net_rx_packet(VLANClientState *nc, const uint8_t *buf, size_t size) |
261 | e613b064 | aliguori | { |
262 | 658788c5 | Mark McLoughlin | struct XenNetDev *netdev = DO_UPCAST(NICState, nc, nc)->opaque;
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263 | e613b064 | aliguori | netif_rx_request_t rxreq; |
264 | e613b064 | aliguori | RING_IDX rc, rp; |
265 | e613b064 | aliguori | void *page;
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266 | e613b064 | aliguori | |
267 | 209cd7ab | Anthony PERARD | if (netdev->xendev.be_state != XenbusStateConnected) {
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268 | 209cd7ab | Anthony PERARD | return -1; |
269 | 209cd7ab | Anthony PERARD | } |
270 | e613b064 | aliguori | |
271 | e613b064 | aliguori | rc = netdev->rx_ring.req_cons; |
272 | e613b064 | aliguori | rp = netdev->rx_ring.sring->req_prod; |
273 | e613b064 | aliguori | xen_rmb(); /* Ensure we see queued requests up to 'rp'. */
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274 | e613b064 | aliguori | |
275 | e613b064 | aliguori | if (rc == rp || RING_REQUEST_CONS_OVERFLOW(&netdev->rx_ring, rc)) {
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276 | 209cd7ab | Anthony PERARD | xen_be_printf(&netdev->xendev, 2, "no buffer, drop packet\n"); |
277 | 209cd7ab | Anthony PERARD | return -1; |
278 | e613b064 | aliguori | } |
279 | e613b064 | aliguori | if (size > XC_PAGE_SIZE - NET_IP_ALIGN) {
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280 | 209cd7ab | Anthony PERARD | xen_be_printf(&netdev->xendev, 0, "packet too big (%lu > %ld)", |
281 | 209cd7ab | Anthony PERARD | (unsigned long)size, XC_PAGE_SIZE - NET_IP_ALIGN); |
282 | 209cd7ab | Anthony PERARD | return -1; |
283 | e613b064 | aliguori | } |
284 | e613b064 | aliguori | |
285 | e613b064 | aliguori | memcpy(&rxreq, RING_GET_REQUEST(&netdev->rx_ring, rc), sizeof(rxreq));
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286 | e613b064 | aliguori | netdev->rx_ring.req_cons = ++rc; |
287 | e613b064 | aliguori | |
288 | e613b064 | aliguori | page = xc_gnttab_map_grant_ref(netdev->xendev.gnttabdev, |
289 | 209cd7ab | Anthony PERARD | netdev->xendev.dom, |
290 | 209cd7ab | Anthony PERARD | rxreq.gref, PROT_WRITE); |
291 | e613b064 | aliguori | if (page == NULL) { |
292 | 209cd7ab | Anthony PERARD | xen_be_printf(&netdev->xendev, 0, "error: rx gref dereference failed (%d)\n", |
293 | e613b064 | aliguori | rxreq.gref); |
294 | 209cd7ab | Anthony PERARD | net_rx_response(netdev, &rxreq, NETIF_RSP_ERROR, 0, 0, 0); |
295 | 209cd7ab | Anthony PERARD | return -1; |
296 | e613b064 | aliguori | } |
297 | e613b064 | aliguori | memcpy(page + NET_IP_ALIGN, buf, size); |
298 | e613b064 | aliguori | xc_gnttab_munmap(netdev->xendev.gnttabdev, page, 1);
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299 | e613b064 | aliguori | net_rx_response(netdev, &rxreq, NETIF_RSP_OKAY, NET_IP_ALIGN, size, 0);
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300 | 4f1c942b | Mark McLoughlin | |
301 | 4f1c942b | Mark McLoughlin | return size;
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302 | e613b064 | aliguori | } |
303 | e613b064 | aliguori | |
304 | e613b064 | aliguori | /* ------------------------------------------------------------- */
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305 | e613b064 | aliguori | |
306 | 658788c5 | Mark McLoughlin | static NetClientInfo net_xen_info = {
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307 | 658788c5 | Mark McLoughlin | .type = NET_CLIENT_TYPE_NIC, |
308 | 658788c5 | Mark McLoughlin | .size = sizeof(NICState),
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309 | 658788c5 | Mark McLoughlin | .can_receive = net_rx_ok, |
310 | 658788c5 | Mark McLoughlin | .receive = net_rx_packet, |
311 | 658788c5 | Mark McLoughlin | }; |
312 | 658788c5 | Mark McLoughlin | |
313 | e613b064 | aliguori | static int net_init(struct XenDevice *xendev) |
314 | e613b064 | aliguori | { |
315 | e613b064 | aliguori | struct XenNetDev *netdev = container_of(xendev, struct XenNetDev, xendev); |
316 | e613b064 | aliguori | |
317 | e613b064 | aliguori | /* read xenstore entries */
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318 | 209cd7ab | Anthony PERARD | if (netdev->mac == NULL) { |
319 | 209cd7ab | Anthony PERARD | netdev->mac = xenstore_read_be_str(&netdev->xendev, "mac");
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320 | 209cd7ab | Anthony PERARD | } |
321 | e613b064 | aliguori | |
322 | e613b064 | aliguori | /* do we have all we need? */
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323 | 209cd7ab | Anthony PERARD | if (netdev->mac == NULL) { |
324 | 209cd7ab | Anthony PERARD | return -1; |
325 | 209cd7ab | Anthony PERARD | } |
326 | e613b064 | aliguori | |
327 | 209cd7ab | Anthony PERARD | if (net_parse_macaddr(netdev->conf.macaddr.a, netdev->mac) < 0) { |
328 | 658788c5 | Mark McLoughlin | return -1; |
329 | 209cd7ab | Anthony PERARD | } |
330 | 658788c5 | Mark McLoughlin | |
331 | 658788c5 | Mark McLoughlin | netdev->conf.vlan = qemu_find_vlan(netdev->xendev.dev, 1);
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332 | 658788c5 | Mark McLoughlin | netdev->conf.peer = NULL;
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333 | 658788c5 | Mark McLoughlin | |
334 | 658788c5 | Mark McLoughlin | netdev->nic = qemu_new_nic(&net_xen_info, &netdev->conf, |
335 | 658788c5 | Mark McLoughlin | "xen", NULL, netdev); |
336 | 658788c5 | Mark McLoughlin | |
337 | 658788c5 | Mark McLoughlin | snprintf(netdev->nic->nc.info_str, sizeof(netdev->nic->nc.info_str),
|
338 | e613b064 | aliguori | "nic: xenbus vif macaddr=%s", netdev->mac);
|
339 | e613b064 | aliguori | |
340 | e613b064 | aliguori | /* fill info */
|
341 | e613b064 | aliguori | xenstore_write_be_int(&netdev->xendev, "feature-rx-copy", 1); |
342 | e613b064 | aliguori | xenstore_write_be_int(&netdev->xendev, "feature-rx-flip", 0); |
343 | e613b064 | aliguori | |
344 | e613b064 | aliguori | return 0; |
345 | e613b064 | aliguori | } |
346 | e613b064 | aliguori | |
347 | e613b064 | aliguori | static int net_connect(struct XenDevice *xendev) |
348 | e613b064 | aliguori | { |
349 | e613b064 | aliguori | struct XenNetDev *netdev = container_of(xendev, struct XenNetDev, xendev); |
350 | e613b064 | aliguori | int rx_copy;
|
351 | e613b064 | aliguori | |
352 | e613b064 | aliguori | if (xenstore_read_fe_int(&netdev->xendev, "tx-ring-ref", |
353 | 209cd7ab | Anthony PERARD | &netdev->tx_ring_ref) == -1) {
|
354 | 209cd7ab | Anthony PERARD | return -1; |
355 | 209cd7ab | Anthony PERARD | } |
356 | e613b064 | aliguori | if (xenstore_read_fe_int(&netdev->xendev, "rx-ring-ref", |
357 | 209cd7ab | Anthony PERARD | &netdev->rx_ring_ref) == -1) {
|
358 | 209cd7ab | Anthony PERARD | return 1; |
359 | 209cd7ab | Anthony PERARD | } |
360 | e613b064 | aliguori | if (xenstore_read_fe_int(&netdev->xendev, "event-channel", |
361 | 209cd7ab | Anthony PERARD | &netdev->xendev.remote_port) == -1) {
|
362 | 209cd7ab | Anthony PERARD | return -1; |
363 | 209cd7ab | Anthony PERARD | } |
364 | e613b064 | aliguori | |
365 | 209cd7ab | Anthony PERARD | if (xenstore_read_fe_int(&netdev->xendev, "request-rx-copy", &rx_copy) == -1) { |
366 | 209cd7ab | Anthony PERARD | rx_copy = 0;
|
367 | 209cd7ab | Anthony PERARD | } |
368 | e613b064 | aliguori | if (rx_copy == 0) { |
369 | 209cd7ab | Anthony PERARD | xen_be_printf(&netdev->xendev, 0, "frontend doesn't support rx-copy.\n"); |
370 | 209cd7ab | Anthony PERARD | return -1; |
371 | e613b064 | aliguori | } |
372 | e613b064 | aliguori | |
373 | e613b064 | aliguori | netdev->txs = xc_gnttab_map_grant_ref(netdev->xendev.gnttabdev, |
374 | 209cd7ab | Anthony PERARD | netdev->xendev.dom, |
375 | 209cd7ab | Anthony PERARD | netdev->tx_ring_ref, |
376 | 209cd7ab | Anthony PERARD | PROT_READ | PROT_WRITE); |
377 | e613b064 | aliguori | netdev->rxs = xc_gnttab_map_grant_ref(netdev->xendev.gnttabdev, |
378 | 209cd7ab | Anthony PERARD | netdev->xendev.dom, |
379 | 209cd7ab | Anthony PERARD | netdev->rx_ring_ref, |
380 | 209cd7ab | Anthony PERARD | PROT_READ | PROT_WRITE); |
381 | 209cd7ab | Anthony PERARD | if (!netdev->txs || !netdev->rxs) {
|
382 | 209cd7ab | Anthony PERARD | return -1; |
383 | 209cd7ab | Anthony PERARD | } |
384 | e613b064 | aliguori | BACK_RING_INIT(&netdev->tx_ring, netdev->txs, XC_PAGE_SIZE); |
385 | e613b064 | aliguori | BACK_RING_INIT(&netdev->rx_ring, netdev->rxs, XC_PAGE_SIZE); |
386 | e613b064 | aliguori | |
387 | e613b064 | aliguori | xen_be_bind_evtchn(&netdev->xendev); |
388 | e613b064 | aliguori | |
389 | e613b064 | aliguori | xen_be_printf(&netdev->xendev, 1, "ok: tx-ring-ref %d, rx-ring-ref %d, " |
390 | 209cd7ab | Anthony PERARD | "remote port %d, local port %d\n",
|
391 | 209cd7ab | Anthony PERARD | netdev->tx_ring_ref, netdev->rx_ring_ref, |
392 | 209cd7ab | Anthony PERARD | netdev->xendev.remote_port, netdev->xendev.local_port); |
393 | 3e3cabcf | Gerd Hoffmann | |
394 | 3e3cabcf | Gerd Hoffmann | net_tx_packets(netdev); |
395 | e613b064 | aliguori | return 0; |
396 | e613b064 | aliguori | } |
397 | e613b064 | aliguori | |
398 | e613b064 | aliguori | static void net_disconnect(struct XenDevice *xendev) |
399 | e613b064 | aliguori | { |
400 | e613b064 | aliguori | struct XenNetDev *netdev = container_of(xendev, struct XenNetDev, xendev); |
401 | e613b064 | aliguori | |
402 | e613b064 | aliguori | xen_be_unbind_evtchn(&netdev->xendev); |
403 | e613b064 | aliguori | |
404 | e613b064 | aliguori | if (netdev->txs) {
|
405 | 209cd7ab | Anthony PERARD | xc_gnttab_munmap(netdev->xendev.gnttabdev, netdev->txs, 1);
|
406 | 209cd7ab | Anthony PERARD | netdev->txs = NULL;
|
407 | e613b064 | aliguori | } |
408 | e613b064 | aliguori | if (netdev->rxs) {
|
409 | 209cd7ab | Anthony PERARD | xc_gnttab_munmap(netdev->xendev.gnttabdev, netdev->rxs, 1);
|
410 | 209cd7ab | Anthony PERARD | netdev->rxs = NULL;
|
411 | e613b064 | aliguori | } |
412 | 658788c5 | Mark McLoughlin | if (netdev->nic) {
|
413 | 658788c5 | Mark McLoughlin | qemu_del_vlan_client(&netdev->nic->nc); |
414 | 658788c5 | Mark McLoughlin | netdev->nic = NULL;
|
415 | e613b064 | aliguori | } |
416 | e613b064 | aliguori | } |
417 | e613b064 | aliguori | |
418 | e613b064 | aliguori | static void net_event(struct XenDevice *xendev) |
419 | e613b064 | aliguori | { |
420 | e613b064 | aliguori | struct XenNetDev *netdev = container_of(xendev, struct XenNetDev, xendev); |
421 | e613b064 | aliguori | net_tx_packets(netdev); |
422 | e613b064 | aliguori | } |
423 | e613b064 | aliguori | |
424 | e613b064 | aliguori | static int net_free(struct XenDevice *xendev) |
425 | e613b064 | aliguori | { |
426 | e613b064 | aliguori | struct XenNetDev *netdev = container_of(xendev, struct XenNetDev, xendev); |
427 | e613b064 | aliguori | |
428 | 7267c094 | Anthony Liguori | g_free(netdev->mac); |
429 | e613b064 | aliguori | return 0; |
430 | e613b064 | aliguori | } |
431 | e613b064 | aliguori | |
432 | e613b064 | aliguori | /* ------------------------------------------------------------- */
|
433 | e613b064 | aliguori | |
434 | e613b064 | aliguori | struct XenDevOps xen_netdev_ops = {
|
435 | e613b064 | aliguori | .size = sizeof(struct XenNetDev), |
436 | e613b064 | aliguori | .flags = DEVOPS_FLAG_NEED_GNTDEV, |
437 | e613b064 | aliguori | .init = net_init, |
438 | 384087b2 | John Haxby | .initialise = net_connect, |
439 | e613b064 | aliguori | .event = net_event, |
440 | e613b064 | aliguori | .disconnect = net_disconnect, |
441 | e613b064 | aliguori | .free = net_free, |
442 | e613b064 | aliguori | }; |