xref: /freebsd/sys/dev/sfxge/common/medford_nic.c (revision f126890ac5386406dadf7c4cfa9566cbb56537c5)
1 /*-
2  * Copyright (c) 2015-2016 Solarflare Communications Inc.
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  * 2. Redistributions in binary form must reproduce the above copyright notice,
11  *    this list of conditions and the following disclaimer in the documentation
12  *    and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
15  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
16  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
18  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
21  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
22  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
23  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
24  * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25  *
26  * The views and conclusions contained in the software and documentation are
27  * those of the authors and should not be interpreted as representing official
28  * policies, either expressed or implied, of the FreeBSD Project.
29  */
30 
31 #include <sys/cdefs.h>
32 #include "efx.h"
33 #include "efx_impl.h"
34 
35 #if EFSYS_OPT_MEDFORD
36 
37 static	__checkReturn	efx_rc_t
38 medford_nic_get_required_pcie_bandwidth(
39 	__in		efx_nic_t *enp,
40 	__out		uint32_t *bandwidth_mbpsp)
41 {
42 	uint32_t bandwidth;
43 	efx_rc_t rc;
44 
45 	if ((rc = ef10_nic_get_port_mode_bandwidth(enp,
46 						    &bandwidth)) != 0)
47 		goto fail1;
48 
49 	*bandwidth_mbpsp = bandwidth;
50 
51 	return (0);
52 
53 fail1:
54 	EFSYS_PROBE1(fail1, efx_rc_t, rc);
55 
56 	return (rc);
57 }
58 
59 	__checkReturn	efx_rc_t
60 medford_board_cfg(
61 	__in		efx_nic_t *enp)
62 {
63 	efx_nic_cfg_t *encp = &(enp->en_nic_cfg);
64 	uint32_t sysclk, dpcpu_clk;
65 	uint32_t end_padding;
66 	uint32_t bandwidth;
67 	efx_rc_t rc;
68 
69 	/*
70 	 * Enable firmware workarounds for hardware errata.
71 	 * Expected responses are:
72 	 *  - 0 (zero):
73 	 *	Success: workaround enabled or disabled as requested.
74 	 *  - MC_CMD_ERR_ENOSYS (reported as ENOTSUP):
75 	 *	Firmware does not support the MC_CMD_WORKAROUND request.
76 	 *	(assume that the workaround is not supported).
77 	 *  - MC_CMD_ERR_ENOENT (reported as ENOENT):
78 	 *	Firmware does not support the requested workaround.
79 	 *  - MC_CMD_ERR_EPERM  (reported as EACCES):
80 	 *	Unprivileged function cannot enable/disable workarounds.
81 	 *
82 	 * See efx_mcdi_request_errcode() for MCDI error translations.
83 	 */
84 
85 	if (EFX_PCI_FUNCTION_IS_VF(encp)) {
86 		/*
87 		 * Interrupt testing does not work for VFs. See bug50084 and
88 		 * bug71432 comment 21.
89 		 */
90 		encp->enc_bug41750_workaround = B_TRUE;
91 	}
92 
93 	/* Chained multicast is always enabled on Medford */
94 	encp->enc_bug26807_workaround = B_TRUE;
95 
96 	/*
97 	 * If the bug61265 workaround is enabled, then interrupt holdoff timers
98 	 * cannot be controlled by timer table writes, so MCDI must be used
99 	 * (timer table writes can still be used for wakeup timers).
100 	 */
101 	rc = efx_mcdi_set_workaround(enp, MC_CMD_WORKAROUND_BUG61265, B_TRUE,
102 	    NULL);
103 	if ((rc == 0) || (rc == EACCES))
104 		encp->enc_bug61265_workaround = B_TRUE;
105 	else if ((rc == ENOTSUP) || (rc == ENOENT))
106 		encp->enc_bug61265_workaround = B_FALSE;
107 	else
108 		goto fail1;
109 
110 	/* Checksums for TSO sends can be incorrect on Medford. */
111 	encp->enc_bug61297_workaround = B_TRUE;
112 
113 	/* Get clock frequencies (in MHz). */
114 	if ((rc = efx_mcdi_get_clock(enp, &sysclk, &dpcpu_clk)) != 0)
115 		goto fail2;
116 
117 	/*
118 	 * The Medford timer quantum is 1536 dpcpu_clk cycles, documented for
119 	 * the EV_TMR_VAL field of EV_TIMER_TBL. Scale for MHz and ns units.
120 	 */
121 	encp->enc_evq_timer_quantum_ns = 1536000UL / dpcpu_clk; /* 1536 cycles */
122 	encp->enc_evq_timer_max_us = (encp->enc_evq_timer_quantum_ns <<
123 		    FRF_CZ_TC_TIMER_VAL_WIDTH) / 1000;
124 
125 	/* Alignment for receive packet DMA buffers */
126 	encp->enc_rx_buf_align_start = 1;
127 
128 	/* Get the RX DMA end padding alignment configuration */
129 	if ((rc = efx_mcdi_get_rxdp_config(enp, &end_padding)) != 0) {
130 		if (rc != EACCES)
131 			goto fail3;
132 
133 		/* Assume largest tail padding size supported by hardware */
134 		end_padding = 256;
135 	}
136 	encp->enc_rx_buf_align_end = end_padding;
137 
138 	/*
139 	 * The maximum supported transmit queue size is 2048. TXQs with 4096
140 	 * descriptors are not supported as the top bit is used for vfifo
141 	 * stuffing.
142 	 */
143 	encp->enc_txq_max_ndescs = 2048;
144 
145 	EFX_STATIC_ASSERT(MEDFORD_PIOBUF_NBUFS <= EF10_MAX_PIOBUF_NBUFS);
146 	encp->enc_piobuf_limit = MEDFORD_PIOBUF_NBUFS;
147 	encp->enc_piobuf_size = MEDFORD_PIOBUF_SIZE;
148 	encp->enc_piobuf_min_alloc_size = MEDFORD_MIN_PIO_ALLOC_SIZE;
149 
150 	/*
151 	 * Medford stores a single global copy of VPD, not per-PF as on
152 	 * Huntington.
153 	 */
154 	encp->enc_vpd_is_global = B_TRUE;
155 
156 	rc = medford_nic_get_required_pcie_bandwidth(enp, &bandwidth);
157 	if (rc != 0)
158 		goto fail4;
159 	encp->enc_required_pcie_bandwidth_mbps = bandwidth;
160 	encp->enc_max_pcie_link_gen = EFX_PCIE_LINK_SPEED_GEN3;
161 
162 	return (0);
163 
164 fail4:
165 	EFSYS_PROBE(fail4);
166 fail3:
167 	EFSYS_PROBE(fail3);
168 fail2:
169 	EFSYS_PROBE(fail2);
170 fail1:
171 	EFSYS_PROBE1(fail1, efx_rc_t, rc);
172 
173 	return (rc);
174 }
175 
176 #endif	/* EFSYS_OPT_MEDFORD */
177