if_em.h revision 106649 
1/**************************************************************************
2
3Copyright (c) 2001-2002, Intel Corporation
4All rights reserved.
5
6Redistribution and use in source and binary forms, with or without
7modification, are permitted provided that the following conditions are met:
8
9 1. Redistributions of source code must retain the above copyright notice,
10    this list of conditions and the following disclaimer.
11
12 2. Redistributions in binary form must reproduce the above copyright
13    notice, this list of conditions and the following disclaimer in the
14    documentation and/or other materials provided with the distribution.
15
16 3. Neither the name of the Intel Corporation nor the names of its
17    contributors may be used to endorse or promote products derived from
18    this software without specific prior written permission.
19
20THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30POSSIBILITY OF SUCH DAMAGE.
31
32***************************************************************************/
33
34/*$FreeBSD: head/sys/dev/em/if_em.h 106649 2002-11-08 18:14:17Z pdeuskar $*/
35
36#ifndef _EM_H_DEFINED_
37#define _EM_H_DEFINED_
38
39
40#include <sys/param.h>
41#include <sys/systm.h>
42#include <sys/mbuf.h>
43#include <sys/protosw.h>
44#include <sys/socket.h>
45#include <sys/malloc.h>
46#include <sys/kernel.h>
47#include <sys/sockio.h>
48
49#include <net/if.h>
50#include <net/if_arp.h>
51#include <net/ethernet.h>
52#include <net/if_dl.h>
53#include <net/if_media.h>
54
55#include <net/bpf.h>
56#include <net/if_types.h>
57#include <net/if_vlan_var.h>
58
59#include <netinet/in_systm.h>
60#include <netinet/in.h>
61#include <netinet/ip.h>
62#include <netinet/tcp.h>
63#include <netinet/udp.h>
64
65#include <sys/bus.h>
66#include <machine/bus.h>
67#include <sys/rman.h>
68#include <machine/resource.h>
69#include <vm/vm.h>
70#include <vm/pmap.h>
71#include <machine/clock.h>
72#include <pci/pcivar.h>
73#include <pci/pcireg.h>
74#include "opt_bdg.h"
75
76#include <dev/em/if_em_hw.h>
77
78/* Tunables -- Begin */
79
80/*
81 * FlowControl
82 * Valid Range: 0-3 (0=none, 1=Rx only, 2=Tx only, 3=Rx&Tx)
83 * Default: Read flow control settings from the EEPROM
84 *   This parameter controls the automatic generation(Tx) and response(Rx) to
85 *   Ethernet PAUSE frames.
86 */
87
88
89/*
90 * TxDescriptors
91 * Valid Range: 80-256 for 82542 and 82543-based adapters
92 *            80-4096 for 82540, 82544, 82545, and 82546-based adapters
93 * Default Value: 256
94 *   This value is the number of transmit descriptors allocated by the driver.
95 *   Increasing this value allows the driver to queue more transmits. Each
96 *   descriptor is 16 bytes.
97 */
98#define EM_MAX_TXD                      256
99
100/*
101 * RxDescriptors
102 * Valid Range: 80-256 for 82542 and 82543-based adapters
103 *            80-4096 for 82540, 82544, 82545, and 82546-based adapters
104 * Default Value: 256
105 *   This value is the number of receive descriptors allocated by the driver.
106 *   Increasing this value allows the driver to buffer more incoming packets.
107 *   Each descriptor is 16 bytes.  A receive buffer is also allocated for each
108 *   descriptor. The maximum MTU size is 16110.
109 *
110 */
111#define EM_MAX_RXD                      256
112
113/*
114 * TxIntDelay
115 * Valid Range: 0-65535 (0=off)
116 * Default Value: 64
117 *   This value delays the generation of transmit interrupts in units of
118 *   1.024 microseconds. Transmit interrupt reduction can improve CPU
119 *   efficiency if properly tuned for specific network traffic. If the
120 *   system is reporting dropped transmits, this value may be set too high
121 *   causing the driver to run out of available transmit descriptors.
122 */
123#define EM_TIDV                         128
124
125/*
126 * RxIntDelay
127 * Valid Range: 0-65535 (0=off)
128 * Default Value: 0
129 *   This value delays the generation of receive interrupts in units of 1.024
130 *   microseconds.  Receive interrupt reduction can improve CPU efficiency if
131 *   properly tuned for specific network traffic. Increasing this value adds
132 *   extra latency to frame reception and can end up decreasing the throughput
133 *   of TCP traffic. If the system is reporting dropped receives, this value
134 *   may be set too high, causing the driver to run out of available receive
135 *   descriptors.
136 *
137 *   CAUTION: When setting RxIntDelay to a value other than 0, adapters
138 *            may hang (stop transmitting) under certain network conditions.
139 *            If this occurs a WATCHDOG message is logged in the system event log.
140 *            In addition, the controller is automatically reset, restoring the
141 *            network connection. To eliminate the potential for the hang
142 *            ensure that RxIntDelay is set to 0.
143 */
144#define EM_RDTR                         0
145
146
147/*
148 * This parameter controls the maximum no of times the driver will loop
149 * in the isr.
150 *           Minimum Value = 1
151 */
152#define EM_MAX_INTR                     3
153
154
155/*
156 * This parameter determines when the hardware will report that it is
157 * done with the packet.
158 *           0 - "Done" is reported when the packet has been sent on the wire
159 *           1 - "Done" is reported when the packet has been DMA'ed and is on chip.
160 *           2 -  Determine the best method.
161 */
162#define EM_REPORT_TX_EARLY              2
163
164/*
165 * Inform the stack about transmit checksum offload capabilities.
166 */
167#define EM_CHECKSUM_FEATURES            (CSUM_TCP | CSUM_UDP)
168
169/*
170 * This parameter controls the duration of transmit watchdog timer.
171 */
172#define EM_TX_TIMEOUT                   5    /* set to 5 seconds */
173
174/*
175 * This parameter controls when the driver calls the routine to reclaim
176 * transmit descriptors.
177 */
178#define EM_TX_CLEANUP_THRESHOLD         EM_MAX_TXD / 8
179
180/*
181 * This parameter controls whether or not autonegotation is enabled.
182 *              0 - Disable autonegotiation
183 *              1 - Enable  autonegotiation
184 */
185#define DO_AUTO_NEG                     1
186
187/*
188 * This parameter control whether or not the driver will wait for
189 * autonegotiation to complete.
190 *              1 - Wait for autonegotiation to complete
191 *              0 - Don't wait for autonegotiation to complete
192 */
193#define WAIT_FOR_AUTO_NEG_DEFAULT       1
194
195
196/* Tunables -- End */
197
198#define AUTONEG_ADV_DEFAULT             (ADVERTISE_10_HALF | ADVERTISE_10_FULL | \
199                                         ADVERTISE_100_HALF | ADVERTISE_100_FULL | \
200                                         ADVERTISE_1000_FULL)
201#define EM_VENDOR_ID                    0x8086
202#define EM_MMBA                         0x0010 /* Mem base address */
203#define EM_ROUNDUP(size, unit) (((size) + (unit) - 1) & ~((unit) - 1))
204#define EM_JUMBO_PBA                    0x00000028
205#define EM_DEFAULT_PBA                  0x00000030
206
207#define IOCTL_CMD_TYPE                  u_long
208#define MAX_NUM_MULTICAST_ADDRESSES     128
209#define PCI_ANY_ID                      (~0U)
210#define ETHER_ALIGN                     2
211#define QTAG_TYPE                       0x8100
212
213/* Defines for printing debug information */
214#define DEBUG_INIT  0
215#define DEBUG_IOCTL 0
216#define DEBUG_HW    0
217
218#define INIT_DEBUGOUT(S)            if (DEBUG_INIT)  printf(S "\n")
219#define INIT_DEBUGOUT1(S, A)        if (DEBUG_INIT)  printf(S "\n", A)
220#define INIT_DEBUGOUT2(S, A, B)     if (DEBUG_INIT)  printf(S "\n", A, B)
221#define IOCTL_DEBUGOUT(S)           if (DEBUG_IOCTL) printf(S "\n")
222#define IOCTL_DEBUGOUT1(S, A)       if (DEBUG_IOCTL) printf(S "\n", A)
223#define IOCTL_DEBUGOUT2(S, A, B)    if (DEBUG_IOCTL) printf(S "\n", A, B)
224#define HW_DEBUGOUT(S)              if (DEBUG_HW) printf(S "\n")
225#define HW_DEBUGOUT1(S, A)          if (DEBUG_HW) printf(S "\n", A)
226#define HW_DEBUGOUT2(S, A, B)       if (DEBUG_HW) printf(S "\n", A, B)
227
228
229/* Supported RX Buffer Sizes */
230#define EM_RXBUFFER_2048        2048
231#define EM_RXBUFFER_4096        4096
232#define EM_RXBUFFER_8192        8192
233#define EM_RXBUFFER_16384      16384
234
235#ifdef __alpha__
236	#undef vtophys
237	#define vtophys(va)     alpha_XXX_dmamap((vm_offset_t)(va))
238#endif /* __alpha__ */
239
240/* ******************************************************************************
241 * vendor_info_array
242 *
243 * This array contains the list of Subvendor/Subdevice IDs on which the driver
244 * should load.
245 *
246 * ******************************************************************************/
247typedef struct _em_vendor_info_t {
248	unsigned int vendor_id;
249	unsigned int device_id;
250	unsigned int subvendor_id;
251	unsigned int subdevice_id;
252	unsigned int index;
253} em_vendor_info_t;
254
255
256struct em_tx_buffer {
257	STAILQ_ENTRY(em_tx_buffer) em_tx_entry;
258	struct mbuf    *m_head;
259	struct em_tx_desc *used_tx_desc;
260};
261
262/* ******************************************************************************
263 * This structure stores information about the 2k aligned receive buffer
264 * into which the E1000 DMA's frames.
265 * ******************************************************************************/
266struct em_rx_buffer {
267	STAILQ_ENTRY(em_rx_buffer) em_rx_entry;
268	struct mbuf    *m_head;
269	u_int64_t      buffer_addr;
270};
271
272typedef enum _XSUM_CONTEXT_T {
273	OFFLOAD_NONE,
274	OFFLOAD_TCP_IP,
275	OFFLOAD_UDP_IP
276} XSUM_CONTEXT_T;
277
278/* Our adapter structure */
279struct adapter {
280	struct arpcom   interface_data;
281	struct adapter *next;
282	struct adapter *prev;
283	struct em_hw    hw;
284
285	/* FreeBSD operating-system-specific structures */
286	struct em_osdep osdep;
287	struct device   *dev;
288	struct resource *res_memory;
289	struct resource *res_ioport;
290	struct resource *res_interrupt;
291	void            *int_handler_tag;
292	struct ifmedia  media;
293	struct callout_handle timer_handle;
294	int             io_rid;
295	u_int8_t        unit;
296
297	/* Info about the board itself */
298	u_int32_t       part_num;
299	u_int8_t        link_active;
300	u_int16_t       link_speed;
301	u_int16_t       link_duplex;
302	u_int32_t       tx_int_delay;
303	u_int32_t       rx_int_delay;
304
305	XSUM_CONTEXT_T  active_checksum_context;
306
307	/* Transmit definitions */
308	struct em_tx_desc *first_tx_desc;
309	struct em_tx_desc *last_tx_desc;
310	struct em_tx_desc *next_avail_tx_desc;
311	struct em_tx_desc *tx_desc_base;
312	volatile u_int16_t num_tx_desc_avail;
313	u_int16_t       num_tx_desc;
314	u_int32_t       txd_cmd;
315	struct em_tx_buffer   *tx_buffer_area;
316	STAILQ_HEAD(__em_tx_buffer_free, em_tx_buffer)  free_tx_buffer_list;
317	STAILQ_HEAD(__em_tx_buffer_used, em_tx_buffer)  used_tx_buffer_list;
318
319	/* Receive definitions */
320	struct em_rx_desc *first_rx_desc;
321	struct em_rx_desc *last_rx_desc;
322	struct em_rx_desc *next_rx_desc_to_check;
323	struct em_rx_desc *rx_desc_base;
324	u_int16_t       num_rx_desc;
325	u_int32_t       rx_buffer_len;
326	struct em_rx_buffer   *rx_buffer_area;
327	STAILQ_HEAD(__em_rx_buffer, em_rx_buffer)  rx_buffer_list;
328
329	/* Jumbo frame */
330	struct mbuf     *fmp;
331	struct mbuf     *lmp;
332
333
334	/* Misc stats maintained by the driver */
335	unsigned long   dropped_pkts;
336	unsigned long   mbuf_alloc_failed;
337	unsigned long   mbuf_cluster_failed;
338	unsigned long   no_tx_desc_avail1;
339	unsigned long   no_tx_desc_avail2;
340	unsigned long   no_tx_buffer_avail1;
341	unsigned long   no_tx_buffer_avail2;
342#ifdef DBG_STATS
343	unsigned long   no_pkts_avail;
344	unsigned long   clean_tx_interrupts;
345
346#endif
347
348	struct em_hw_stats stats;
349};
350
351#endif                                                  /* _EM_H_DEFINED_ */
352