1 /* SPDX-License-Identifier: BSD-3-Clause
3 * Copyright (c) 2015-2018 Solarflare Communications Inc.
11 #if EFSYS_OPT_MEDFORD2
13 static __checkReturn efx_rc_t
14 medford2_nic_get_required_pcie_bandwidth(
16 __out uint32_t *bandwidth_mbpsp)
19 uint32_t current_mode;
23 /* FIXME: support new Medford2 dynamic port modes */
25 if ((rc = efx_mcdi_get_port_modes(enp, &port_modes,
26 ¤t_mode)) != 0) {
27 /* No port mode info available. */
32 if ((rc = ef10_nic_get_port_mode_bandwidth(current_mode,
37 *bandwidth_mbpsp = bandwidth;
42 EFSYS_PROBE1(fail1, efx_rc_t, rc);
47 __checkReturn efx_rc_t
51 efx_nic_cfg_t *encp = &(enp->en_nic_cfg);
53 uint32_t sysclk, dpcpu_clk;
56 uint32_t vi_window_shift;
60 * FIXME: Likely to be incomplete and incorrect.
61 * Parts of this should be shared with Huntington.
64 /* Medford2 has a variable VI window size (8K, 16K or 64K) */
65 if ((rc = ef10_get_vi_window_shift(enp, &vi_window_shift)) != 0)
68 EFSYS_ASSERT3U(vi_window_shift, <=, EFX_VI_WINDOW_SHIFT_64K);
69 encp->enc_vi_window_shift = vi_window_shift;
73 * Enable firmware workarounds for hardware errata.
74 * Expected responses are:
76 * Success: workaround enabled or disabled as requested.
77 * - MC_CMD_ERR_ENOSYS (reported as ENOTSUP):
78 * Firmware does not support the MC_CMD_WORKAROUND request.
79 * (assume that the workaround is not supported).
80 * - MC_CMD_ERR_ENOENT (reported as ENOENT):
81 * Firmware does not support the requested workaround.
82 * - MC_CMD_ERR_EPERM (reported as EACCES):
83 * Unprivileged function cannot enable/disable workarounds.
85 * See efx_mcdi_request_errcode() for MCDI error translations.
89 if (EFX_PCI_FUNCTION_IS_VF(encp)) {
91 * Interrupt testing does not work for VFs on Medford2.
92 * See bug50084 and bug71432 comment 21.
94 encp->enc_bug41750_workaround = B_TRUE;
97 /* Chained multicast is always enabled on Medford2 */
98 encp->enc_bug26807_workaround = B_TRUE;
101 * If the bug61265 workaround is enabled, then interrupt holdoff timers
102 * cannot be controlled by timer table writes, so MCDI must be used
103 * (timer table writes can still be used for wakeup timers).
105 rc = efx_mcdi_set_workaround(enp, MC_CMD_WORKAROUND_BUG61265, B_TRUE,
107 if ((rc == 0) || (rc == EACCES))
108 encp->enc_bug61265_workaround = B_TRUE;
109 else if ((rc == ENOTSUP) || (rc == ENOENT))
110 encp->enc_bug61265_workaround = B_FALSE;
114 /* Get clock frequencies (in MHz). */
115 if ((rc = efx_mcdi_get_clock(enp, &sysclk, &dpcpu_clk)) != 0)
119 * The Medford2 timer quantum is 1536 dpcpu_clk cycles, documented for
120 * the EV_TMR_VAL field of EV_TIMER_TBL. Scale for MHz and ns units.
122 encp->enc_evq_timer_quantum_ns = 1536000UL / dpcpu_clk; /* 1536 cycles */
123 encp->enc_evq_timer_max_us = (encp->enc_evq_timer_quantum_ns <<
124 FRF_CZ_TC_TIMER_VAL_WIDTH) / 1000;
126 /* Alignment for receive packet DMA buffers */
127 encp->enc_rx_buf_align_start = 1;
129 /* Get the RX DMA end padding alignment configuration */
130 if ((rc = efx_mcdi_get_rxdp_config(enp, &end_padding)) != 0) {
134 /* Assume largest tail padding size supported by hardware */
137 encp->enc_rx_buf_align_end = end_padding;
140 * The maximum supported transmit queue size is 2048. TXQs with 4096
141 * descriptors are not supported as the top bit is used for vfifo
144 encp->enc_txq_max_ndescs = 2048;
146 EFX_STATIC_ASSERT(MEDFORD2_PIOBUF_NBUFS <= EF10_MAX_PIOBUF_NBUFS);
147 encp->enc_piobuf_limit = MEDFORD2_PIOBUF_NBUFS;
148 encp->enc_piobuf_size = MEDFORD2_PIOBUF_SIZE;
149 encp->enc_piobuf_min_alloc_size = MEDFORD2_MIN_PIO_ALLOC_SIZE;
152 * Get the current privilege mask. Note that this may be modified
153 * dynamically, so this value is informational only. DO NOT use
154 * the privilege mask to check for sufficient privileges, as that
155 * can result in time-of-check/time-of-use bugs.
157 if ((rc = ef10_get_privilege_mask(enp, &mask)) != 0)
159 encp->enc_privilege_mask = mask;
162 * Medford2 stores a single global copy of VPD, not per-PF as on
165 encp->enc_vpd_is_global = B_TRUE;
167 rc = medford2_nic_get_required_pcie_bandwidth(enp, &bandwidth);
170 encp->enc_required_pcie_bandwidth_mbps = bandwidth;
171 encp->enc_max_pcie_link_gen = EFX_PCIE_LINK_SPEED_GEN3;
186 EFSYS_PROBE1(fail1, efx_rc_t, rc);
191 #endif /* EFSYS_OPT_MEDFORD2 */