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);
52 ef10_link_state_t els;
53 efx_port_t *epp = &(enp->en_port);
55 uint32_t sysclk, dpcpu_clk;
59 uint32_t vi_window_shift;
63 * FIXME: Likely to be incomplete and incorrect.
64 * Parts of this should be shared with Huntington.
67 /* Medford2 has a variable VI window size (8K, 16K or 64K) */
68 if ((rc = ef10_get_vi_window_shift(enp, &vi_window_shift)) != 0)
71 EFSYS_ASSERT3U(vi_window_shift, <=, EFX_VI_WINDOW_SHIFT_64K);
72 encp->enc_vi_window_shift = vi_window_shift;
75 /* Fill out fields in enp->en_port and enp->en_nic_cfg from MCDI */
76 if ((rc = efx_mcdi_get_phy_cfg(enp)) != 0)
79 /* Obtain the default PHY advertised capabilities */
80 if ((rc = ef10_phy_get_link(enp, &els)) != 0)
82 epp->ep_default_adv_cap_mask = els.els_adv_cap_mask;
83 epp->ep_adv_cap_mask = els.els_adv_cap_mask;
86 * Enable firmware workarounds for hardware errata.
87 * Expected responses are:
89 * Success: workaround enabled or disabled as requested.
90 * - MC_CMD_ERR_ENOSYS (reported as ENOTSUP):
91 * Firmware does not support the MC_CMD_WORKAROUND request.
92 * (assume that the workaround is not supported).
93 * - MC_CMD_ERR_ENOENT (reported as ENOENT):
94 * Firmware does not support the requested workaround.
95 * - MC_CMD_ERR_EPERM (reported as EACCES):
96 * Unprivileged function cannot enable/disable workarounds.
98 * See efx_mcdi_request_errcode() for MCDI error translations.
102 if (EFX_PCI_FUNCTION_IS_VF(encp)) {
104 * Interrupt testing does not work for VFs on Medford2.
105 * See bug50084 and bug71432 comment 21.
107 encp->enc_bug41750_workaround = B_TRUE;
110 /* Chained multicast is always enabled on Medford2 */
111 encp->enc_bug26807_workaround = B_TRUE;
114 * If the bug61265 workaround is enabled, then interrupt holdoff timers
115 * cannot be controlled by timer table writes, so MCDI must be used
116 * (timer table writes can still be used for wakeup timers).
118 rc = efx_mcdi_set_workaround(enp, MC_CMD_WORKAROUND_BUG61265, B_TRUE,
120 if ((rc == 0) || (rc == EACCES))
121 encp->enc_bug61265_workaround = B_TRUE;
122 else if ((rc == ENOTSUP) || (rc == ENOENT))
123 encp->enc_bug61265_workaround = B_FALSE;
127 /* Get clock frequencies (in MHz). */
128 if ((rc = efx_mcdi_get_clock(enp, &sysclk, &dpcpu_clk)) != 0)
132 * The Medford2 timer quantum is 1536 dpcpu_clk cycles, documented for
133 * the EV_TMR_VAL field of EV_TIMER_TBL. Scale for MHz and ns units.
135 encp->enc_evq_timer_quantum_ns = 1536000UL / dpcpu_clk; /* 1536 cycles */
136 encp->enc_evq_timer_max_us = (encp->enc_evq_timer_quantum_ns <<
137 FRF_CZ_TC_TIMER_VAL_WIDTH) / 1000;
139 /* Check capabilities of running datapath firmware */
140 if ((rc = ef10_get_datapath_caps(enp)) != 0)
143 /* Alignment for receive packet DMA buffers */
144 encp->enc_rx_buf_align_start = 1;
146 /* Get the RX DMA end padding alignment configuration */
147 if ((rc = efx_mcdi_get_rxdp_config(enp, &end_padding)) != 0) {
151 /* Assume largest tail padding size supported by hardware */
154 encp->enc_rx_buf_align_end = end_padding;
156 /* Alignment for WPTR updates */
157 encp->enc_rx_push_align = EF10_RX_WPTR_ALIGN;
160 * Maximum number of exclusive RSS contexts which can be allocated. The
161 * hardware supports 64, but 6 are reserved for shared contexts. They
162 * are a global resource so not all may be available.
164 encp->enc_rx_scale_max_exclusive_contexts = 58;
166 encp->enc_tx_dma_desc_size_max = EFX_MASK32(ESF_DZ_RX_KER_BYTE_CNT);
167 /* No boundary crossing limits */
168 encp->enc_tx_dma_desc_boundary = 0;
171 * Set resource limits for MC_CMD_ALLOC_VIS. Note that we cannot use
172 * MC_CMD_GET_RESOURCE_LIMITS here as that reports the available
173 * resources (allocated to this PCIe function), which is zero until
174 * after we have allocated VIs.
176 encp->enc_evq_limit = 1024;
177 encp->enc_rxq_limit = EFX_RXQ_LIMIT_TARGET;
178 encp->enc_txq_limit = EFX_TXQ_LIMIT_TARGET;
181 * The maximum supported transmit queue size is 2048. TXQs with 4096
182 * descriptors are not supported as the top bit is used for vfifo
185 encp->enc_txq_max_ndescs = 2048;
187 encp->enc_buftbl_limit = 0xFFFFFFFF;
189 EFX_STATIC_ASSERT(MEDFORD2_PIOBUF_NBUFS <= EF10_MAX_PIOBUF_NBUFS);
190 encp->enc_piobuf_limit = MEDFORD2_PIOBUF_NBUFS;
191 encp->enc_piobuf_size = MEDFORD2_PIOBUF_SIZE;
192 encp->enc_piobuf_min_alloc_size = MEDFORD2_MIN_PIO_ALLOC_SIZE;
195 * Get the current privilege mask. Note that this may be modified
196 * dynamically, so this value is informational only. DO NOT use
197 * the privilege mask to check for sufficient privileges, as that
198 * can result in time-of-check/time-of-use bugs.
200 if ((rc = ef10_get_privilege_mask(enp, &mask)) != 0)
202 encp->enc_privilege_mask = mask;
204 /* Get interrupt vector limits */
205 if ((rc = efx_mcdi_get_vector_cfg(enp, &base, &nvec, NULL)) != 0) {
206 if (EFX_PCI_FUNCTION_IS_PF(encp))
209 /* Ignore error (cannot query vector limits from a VF). */
213 encp->enc_intr_vec_base = base;
214 encp->enc_intr_limit = nvec;
217 * Maximum number of bytes into the frame the TCP header can start for
218 * firmware assisted TSO to work.
220 encp->enc_tx_tso_tcp_header_offset_limit = EF10_TCP_HEADER_OFFSET_LIMIT;
223 * Medford2 stores a single global copy of VPD, not per-PF as on
226 encp->enc_vpd_is_global = B_TRUE;
228 rc = medford2_nic_get_required_pcie_bandwidth(enp, &bandwidth);
231 encp->enc_required_pcie_bandwidth_mbps = bandwidth;
232 encp->enc_max_pcie_link_gen = EFX_PCIE_LINK_SPEED_GEN3;
255 EFSYS_PROBE1(fail1, efx_rc_t, rc);
260 #endif /* EFSYS_OPT_MEDFORD2 */