FreeBSD/Linux Kernel Cross Reference
sys/net/iflib.h
1 /*-
2 * Copyright (c) 2014-2015, Matthew Macy (mmacy@nextbsd.org)
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice,
9 * this list of conditions and the following disclaimer.
10 *
11 * 2. Neither the name of Matthew Macy nor the names of its
12 * contributors may be used to endorse or promote products derived from
13 * this software without specific prior written permission.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16 * AND 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 COPYRIGHT OWNER OR CONTRIBUTORS BE
19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
25 * POSSIBILITY OF SUCH DAMAGE.
26 *
27 * $FreeBSD: releng/11.0/sys/net/iflib.h 304716 2016-08-24 01:56:30Z shurd $
28 */
29 #ifndef __IFLIB_H_
30 #define __IFLIB_H_
31
32 #include <sys/kobj.h>
33 #include <sys/bus.h>
34 #include <sys/cpuset.h>
35 #include <machine/bus.h>
36 #include <sys/bus_dma.h>
37 #include <sys/nv.h>
38 #include <sys/gtaskqueue.h>
39
40
41 /*
42 * Most cards can handle much larger TSO requests
43 * but the FreeBSD TCP stack will break on larger
44 * values
45 */
46 #define FREEBSD_TSO_SIZE_MAX 65518
47
48
49 struct iflib_ctx;
50 typedef struct iflib_ctx *if_ctx_t;
51 struct if_shared_ctx;
52 typedef struct if_shared_ctx *if_shared_ctx_t;
53 struct if_int_delay_info;
54 typedef struct if_int_delay_info *if_int_delay_info_t;
55
56 /*
57 * File organization:
58 * - public structures
59 * - iflib accessors
60 * - iflib utility functions
61 * - iflib core functions
62 */
63
64 typedef struct if_rxd_frag {
65 uint8_t irf_flid;
66 uint16_t irf_idx;
67 uint16_t irf_len;
68 } *if_rxd_frag_t;
69
70 typedef struct if_rxd_info {
71 /* set by iflib */
72 uint16_t iri_qsidx; /* qset index */
73 uint16_t iri_vtag; /* vlan tag - if flag set */
74 /* XXX redundant with the new irf_len field */
75 uint16_t iri_len; /* packet length */
76 uint16_t iri_cidx; /* consumer index of cq */
77 struct ifnet *iri_ifp; /* some drivers >1 interface per softc */
78
79 /* updated by driver */
80 uint16_t iri_flags; /* mbuf flags for packet */
81 uint32_t iri_flowid; /* RSS hash for packet */
82 uint32_t iri_csum_flags; /* m_pkthdr csum flags */
83 uint32_t iri_csum_data; /* m_pkthdr csum data */
84 uint8_t iri_nfrags; /* number of fragments in packet */
85 uint8_t iri_rsstype; /* RSS hash type */
86 uint8_t iri_pad; /* any padding in the received data */
87 if_rxd_frag_t iri_frags;
88 } *if_rxd_info_t;
89
90 #define IPI_TX_INTR 0x1 /* send an interrupt when this packet is sent */
91 #define IPI_TX_IPV4 0x2 /* ethertype IPv4 */
92 #define IPI_TX_IPV6 0x4 /* ethertype IPv6 */
93
94 typedef struct if_pkt_info {
95 uint32_t ipi_len; /* packet length */
96 bus_dma_segment_t *ipi_segs; /* physical addresses */
97 uint16_t ipi_qsidx; /* queue set index */
98 uint16_t ipi_nsegs; /* number of segments */
99 uint16_t ipi_ndescs; /* number of descriptors used by encap */
100 uint16_t ipi_flags; /* iflib per-packet flags */
101 uint32_t ipi_pidx; /* start pidx for encap */
102 uint32_t ipi_new_pidx; /* next available pidx post-encap */
103 /* offload handling */
104 uint64_t ipi_csum_flags; /* packet checksum flags */
105 uint16_t ipi_tso_segsz; /* tso segment size */
106 uint16_t ipi_mflags; /* packet mbuf flags */
107 uint16_t ipi_vtag; /* VLAN tag */
108 uint16_t ipi_etype; /* ether header type */
109 uint8_t ipi_ehdrlen; /* ether header length */
110 uint8_t ipi_ip_hlen; /* ip header length */
111 uint8_t ipi_tcp_hlen; /* tcp header length */
112 uint8_t ipi_tcp_hflags; /* tcp header flags */
113 uint8_t ipi_ipproto; /* ip protocol */
114 /* implied padding */
115 uint32_t ipi_tcp_seq; /* tcp seqno */
116 uint32_t ipi_tcp_sum; /* tcp csum */
117 } *if_pkt_info_t;
118
119 typedef struct if_irq {
120 struct resource *ii_res;
121 int ii_rid;
122 void *ii_tag;
123 } *if_irq_t;
124
125 struct if_int_delay_info {
126 if_ctx_t iidi_ctx; /* Back-pointer to the iflib ctx (softc) */
127 int iidi_offset; /* Register offset to read/write */
128 int iidi_value; /* Current value in usecs */
129 struct sysctl_oid *iidi_oidp;
130 struct sysctl_req *iidi_req;
131 };
132
133 typedef enum {
134 IFLIB_INTR_LEGACY,
135 IFLIB_INTR_MSI,
136 IFLIB_INTR_MSIX
137 } iflib_intr_mode_t;
138
139 /*
140 * This really belongs in pciio.h or some place more general
141 * but this is the only consumer for now.
142 */
143 typedef struct pci_vendor_info {
144 uint32_t pvi_vendor_id;
145 uint32_t pvi_device_id;
146 uint32_t pvi_subvendor_id;
147 uint32_t pvi_subdevice_id;
148 uint32_t pvi_rev_id;
149 uint32_t pvi_class_mask;
150 caddr_t pvi_name;
151 } pci_vendor_info_t;
152
153 #define PVID(vendor, devid, name) {vendor, devid, 0, 0, 0, 0, name}
154 #define PVID_OEM(vendor, devid, svid, sdevid, revid, name) {vendor, devid, svid, sdevid, revid, 0, name}
155 #define PVID_END {0, 0, 0, 0, 0, 0, NULL}
156
157 typedef struct if_txrx {
158 int (*ift_txd_encap) (void *, if_pkt_info_t);
159 void (*ift_txd_flush) (void *, uint16_t, uint32_t);
160 int (*ift_txd_credits_update) (void *, uint16_t, uint32_t, bool);
161
162 int (*ift_rxd_available) (void *, uint16_t qsidx, uint32_t pidx,
163 int budget);
164 int (*ift_rxd_pkt_get) (void *, if_rxd_info_t ri);
165 void (*ift_rxd_refill) (void * , uint16_t qsidx, uint8_t flidx, uint32_t pidx,
166 uint64_t *paddrs, caddr_t *vaddrs, uint16_t count, uint16_t buf_size);
167 void (*ift_rxd_flush) (void *, uint16_t qsidx, uint8_t flidx, uint32_t pidx);
168 int (*ift_legacy_intr) (void *);
169 } *if_txrx_t;
170
171 typedef struct if_softc_ctx {
172 int isc_vectors;
173 int isc_nrxqsets;
174 int isc_ntxqsets;
175 int isc_msix_bar; /* can be model specific - initialize in attach_pre */
176 int isc_tx_nsegments; /* can be model specific - initialize in attach_pre */
177 int isc_ntxd[8];
178 int isc_nrxd[8];
179
180 uint32_t isc_txqsizes[8];
181 uint32_t isc_rxqsizes[8];
182 int isc_max_txqsets;
183 int isc_max_rxqsets;
184 int isc_tx_tso_segments_max;
185 int isc_tx_tso_size_max;
186 int isc_tx_tso_segsize_max;
187 int isc_rss_table_size;
188 int isc_rss_table_mask;
189 int isc_nrxqsets_max;
190 int isc_ntxqsets_max;
191
192 iflib_intr_mode_t isc_intr;
193 uint16_t isc_max_frame_size; /* set at init time by driver */
194 pci_vendor_info_t isc_vendor_info; /* set by iflib prior to attach_pre */
195 } *if_softc_ctx_t;
196
197 /*
198 * Initialization values for device
199 */
200 struct if_shared_ctx {
201 int isc_magic;
202 if_txrx_t isc_txrx;
203 driver_t *isc_driver;
204 int isc_nfl;
205 int isc_flags;
206 bus_size_t isc_q_align;
207 bus_size_t isc_tx_maxsize;
208 bus_size_t isc_tx_maxsegsize;
209 bus_size_t isc_rx_maxsize;
210 bus_size_t isc_rx_maxsegsize;
211 int isc_rx_nsegments;
212 int isc_rx_process_limit;
213 int isc_ntxqs; /* # of tx queues per tx qset - usually 1 */
214 int isc_nrxqs; /* # of rx queues per rx qset - intel 1, chelsio 2, broadcom 3 */
215 int isc_admin_intrcnt; /* # of admin/link interrupts */
216
217
218 int isc_tx_reclaim_thresh;
219
220 /* fields necessary for probe */
221 pci_vendor_info_t *isc_vendor_info;
222 char *isc_driver_version;
223 /* optional function to transform the read values to match the table*/
224 void (*isc_parse_devinfo) (uint16_t *device_id, uint16_t *subvendor_id,
225 uint16_t *subdevice_id, uint16_t *rev_id);
226 int isc_nrxd_min[8];
227 int isc_nrxd_default[8];
228 int isc_nrxd_max[8];
229 int isc_ntxd_min[8];
230 int isc_ntxd_default[8];
231 int isc_ntxd_max[8];
232 };
233
234 typedef struct iflib_dma_info {
235 bus_addr_t idi_paddr;
236 caddr_t idi_vaddr;
237 bus_dma_tag_t idi_tag;
238 bus_dmamap_t idi_map;
239 uint32_t idi_size;
240 } *iflib_dma_info_t;
241
242 #define IFLIB_MAGIC 0xCAFEF00D
243
244 typedef enum {
245 IFLIB_INTR_TX,
246 IFLIB_INTR_RX,
247 IFLIB_INTR_ADMIN,
248 IFLIB_INTR_IOV,
249 } iflib_intr_type_t;
250
251 #ifndef ETH_ADDR_LEN
252 #define ETH_ADDR_LEN 6
253 #endif
254
255
256 /*
257 * Interface has a separate command queue for RX
258 */
259 #define IFLIB_HAS_RXCQ 0x1
260 /*
261 * Driver has already allocated vectors
262 */
263 #define IFLIB_SKIP_MSIX 0x2
264
265 /*
266 * Interface is a virtual function
267 */
268 #define IFLIB_IS_VF 0x4
269 /*
270 * Interface has a separate command queue for TX
271 */
272 #define IFLIB_HAS_TXCQ 0x8
273
274
275 /*
276 * field accessors
277 */
278 void *iflib_get_softc(if_ctx_t ctx);
279
280 device_t iflib_get_dev(if_ctx_t ctx);
281
282 if_t iflib_get_ifp(if_ctx_t ctx);
283
284 struct ifmedia *iflib_get_media(if_ctx_t ctx);
285
286 if_softc_ctx_t iflib_get_softc_ctx(if_ctx_t ctx);
287 if_shared_ctx_t iflib_get_sctx(if_ctx_t ctx);
288
289 void iflib_set_mac(if_ctx_t ctx, uint8_t mac[ETHER_ADDR_LEN]);
290
291
292
293
294 /*
295 * If the driver can plug cleanly in to newbus use these
296 */
297 int iflib_device_probe(device_t);
298 int iflib_device_attach(device_t);
299 int iflib_device_detach(device_t);
300 int iflib_device_suspend(device_t);
301 int iflib_device_resume(device_t);
302 int iflib_device_shutdown(device_t);
303
304
305 int iflib_device_iov_init(device_t, uint16_t, const nvlist_t *);
306 void iflib_device_iov_uninit(device_t);
307 int iflib_device_iov_add_vf(device_t, uint16_t, const nvlist_t *);
308
309 /*
310 * If the driver can't plug cleanly in to newbus
311 * use these
312 */
313 int iflib_device_register(device_t dev, void *softc, if_shared_ctx_t sctx, if_ctx_t *ctxp);
314 int iflib_device_deregister(if_ctx_t);
315
316
317
318 int iflib_irq_alloc(if_ctx_t, if_irq_t, int, driver_filter_t, void *filter_arg, driver_intr_t, void *arg, char *name);
319 int iflib_irq_alloc_generic(if_ctx_t ctx, if_irq_t irq, int rid,
320 iflib_intr_type_t type, driver_filter_t *filter,
321 void *filter_arg, int qid, char *name);
322 void iflib_softirq_alloc_generic(if_ctx_t ctx, int rid, iflib_intr_type_t type, void *arg, int qid, char *name);
323
324 void iflib_irq_free(if_ctx_t ctx, if_irq_t irq);
325
326 void iflib_io_tqg_attach(struct grouptask *gt, void *uniq, int cpu, char *name);
327
328 void iflib_config_gtask_init(if_ctx_t ctx, struct grouptask *gtask,
329 gtask_fn_t *fn, char *name);
330
331 void iflib_config_gtask_deinit(struct grouptask *gtask);
332
333
334
335 void iflib_tx_intr_deferred(if_ctx_t ctx, int txqid);
336 void iflib_rx_intr_deferred(if_ctx_t ctx, int rxqid);
337 void iflib_admin_intr_deferred(if_ctx_t ctx);
338 void iflib_iov_intr_deferred(if_ctx_t ctx);
339
340
341 void iflib_link_state_change(if_ctx_t ctx, int linkstate, uint64_t baudrate);
342
343 int iflib_dma_alloc(if_ctx_t ctx, int size, iflib_dma_info_t dma, int mapflags);
344 void iflib_dma_free(iflib_dma_info_t dma);
345
346 int iflib_dma_alloc_multi(if_ctx_t ctx, int *sizes, iflib_dma_info_t *dmalist, int mapflags, int count);
347
348 void iflib_dma_free_multi(iflib_dma_info_t *dmalist, int count);
349
350
351 struct mtx *iflib_ctx_lock_get(if_ctx_t);
352 struct mtx *iflib_qset_lock_get(if_ctx_t, uint16_t);
353
354 void iflib_led_create(if_ctx_t ctx);
355
356 void iflib_add_int_delay_sysctl(if_ctx_t, const char *, const char *,
357 if_int_delay_info_t, int, int);
358
359 #endif /* __IFLIB_H_ */
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