1 /* SPDX-License-Identifier: BSD-3-Clause
3 * Copyright (c) 2015-2018 Solarflare Communications Inc.
13 static __checkReturn efx_rc_t
14 medford_nic_get_required_pcie_bandwidth(
16 __out uint32_t *bandwidth_mbpsp)
19 uint32_t current_mode;
23 if ((rc = efx_mcdi_get_port_modes(enp, &port_modes,
24 ¤t_mode)) != 0) {
25 /* No port mode info available. */
30 if ((rc = ef10_nic_get_port_mode_bandwidth(current_mode,
35 *bandwidth_mbpsp = bandwidth;
40 EFSYS_PROBE1(fail1, efx_rc_t, rc);
45 __checkReturn efx_rc_t
49 efx_nic_cfg_t *encp = &(enp->en_nic_cfg);
51 uint32_t sysclk, dpcpu_clk;
58 * FIXME: Likely to be incomplete and incorrect.
59 * Parts of this should be shared with Huntington.
62 /* Medford has a fixed 8Kbyte VI window size */
63 EFX_STATIC_ASSERT(ER_DZ_EVQ_RPTR_REG_STEP == 8192);
64 EFX_STATIC_ASSERT(ER_DZ_EVQ_TMR_REG_STEP == 8192);
65 EFX_STATIC_ASSERT(ER_DZ_RX_DESC_UPD_REG_STEP == 8192);
66 EFX_STATIC_ASSERT(ER_DZ_TX_DESC_UPD_REG_STEP == 8192);
67 EFX_STATIC_ASSERT(ER_DZ_TX_PIOBUF_STEP == 8192);
69 EFX_STATIC_ASSERT(1U << EFX_VI_WINDOW_SHIFT_8K == 8192);
70 encp->enc_vi_window_shift = EFX_VI_WINDOW_SHIFT_8K;
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. See bug50084 and
92 * bug71432 comment 21.
94 encp->enc_bug41750_workaround = B_TRUE;
97 /* Chained multicast is always enabled on Medford */
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 Medford 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(MEDFORD_PIOBUF_NBUFS <= EF10_MAX_PIOBUF_NBUFS);
147 encp->enc_piobuf_limit = MEDFORD_PIOBUF_NBUFS;
148 encp->enc_piobuf_size = MEDFORD_PIOBUF_SIZE;
149 encp->enc_piobuf_min_alloc_size = MEDFORD_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;
161 /* Get interrupt vector limits */
162 if ((rc = efx_mcdi_get_vector_cfg(enp, &base, &nvec, NULL)) != 0) {
163 if (EFX_PCI_FUNCTION_IS_PF(encp))
166 /* Ignore error (cannot query vector limits from a VF). */
170 encp->enc_intr_vec_base = base;
171 encp->enc_intr_limit = nvec;
174 * Medford stores a single global copy of VPD, not per-PF as on
177 encp->enc_vpd_is_global = B_TRUE;
179 rc = medford_nic_get_required_pcie_bandwidth(enp, &bandwidth);
182 encp->enc_required_pcie_bandwidth_mbps = bandwidth;
183 encp->enc_max_pcie_link_gen = EFX_PCIE_LINK_SPEED_GEN3;
198 EFSYS_PROBE1(fail1, efx_rc_t, rc);
203 #endif /* EFSYS_OPT_MEDFORD */