1 /* SPDX-License-Identifier: BSD-3-Clause
3 * Copyright (c) 2012-2018 Solarflare Communications Inc.
13 #if EFSYS_OPT_HUNTINGTON
15 #include "ef10_tlv_layout.h"
17 static __checkReturn efx_rc_t
18 hunt_nic_get_required_pcie_bandwidth(
20 __out uint32_t *bandwidth_mbpsp)
23 uint32_t max_port_mode;
28 * On Huntington, the firmware may not give us the current port mode, so
29 * we need to go by the set of available port modes and assume the most
30 * capable mode is in use.
33 if ((rc = efx_mcdi_get_port_modes(enp, &port_modes, NULL)) != 0) {
34 /* No port mode info available */
39 if (port_modes & (1 << TLV_PORT_MODE_40G_40G)) {
41 * This needs the full PCIe bandwidth (and could use
42 * more) - roughly 64 Gbit/s for 8 lanes of Gen3.
44 if ((rc = efx_nic_calculate_pcie_link_bandwidth(8,
45 EFX_PCIE_LINK_SPEED_GEN3, &bandwidth)) != 0)
48 if (port_modes & (1 << TLV_PORT_MODE_40G)) {
49 max_port_mode = TLV_PORT_MODE_40G;
50 } else if (port_modes & (1 << TLV_PORT_MODE_10G_10G_10G_10G)) {
51 max_port_mode = TLV_PORT_MODE_10G_10G_10G_10G;
53 /* Assume two 10G ports */
54 max_port_mode = TLV_PORT_MODE_10G_10G;
57 if ((rc = ef10_nic_get_port_mode_bandwidth(max_port_mode,
63 *bandwidth_mbpsp = bandwidth;
70 EFSYS_PROBE1(fail1, efx_rc_t, rc);
75 __checkReturn efx_rc_t
79 efx_nic_cfg_t *encp = &(enp->en_nic_cfg);
80 ef10_link_state_t els;
81 efx_port_t *epp = &(enp->en_port);
84 uint32_t sysclk, dpcpu_clk;
89 /* Huntington has a fixed 8Kbyte VI window size */
90 EFX_STATIC_ASSERT(ER_DZ_EVQ_RPTR_REG_STEP == 8192);
91 EFX_STATIC_ASSERT(ER_DZ_EVQ_TMR_REG_STEP == 8192);
92 EFX_STATIC_ASSERT(ER_DZ_RX_DESC_UPD_REG_STEP == 8192);
93 EFX_STATIC_ASSERT(ER_DZ_TX_DESC_UPD_REG_STEP == 8192);
94 EFX_STATIC_ASSERT(ER_DZ_TX_PIOBUF_STEP == 8192);
96 EFX_STATIC_ASSERT(1U << EFX_VI_WINDOW_SHIFT_8K == 8192);
97 encp->enc_vi_window_shift = EFX_VI_WINDOW_SHIFT_8K;
99 /* Fill out fields in enp->en_port and enp->en_nic_cfg from MCDI */
100 if ((rc = efx_mcdi_get_phy_cfg(enp)) != 0)
103 /* Obtain the default PHY advertised capabilities */
104 if ((rc = ef10_phy_get_link(enp, &els)) != 0)
106 epp->ep_default_adv_cap_mask = els.els_adv_cap_mask;
107 epp->ep_adv_cap_mask = els.els_adv_cap_mask;
110 * Enable firmware workarounds for hardware errata.
111 * Expected responses are:
113 * Success: workaround enabled or disabled as requested.
114 * - MC_CMD_ERR_ENOSYS (reported as ENOTSUP):
115 * Firmware does not support the MC_CMD_WORKAROUND request.
116 * (assume that the workaround is not supported).
117 * - MC_CMD_ERR_ENOENT (reported as ENOENT):
118 * Firmware does not support the requested workaround.
119 * - MC_CMD_ERR_EPERM (reported as EACCES):
120 * Unprivileged function cannot enable/disable workarounds.
122 * See efx_mcdi_request_errcode() for MCDI error translations.
126 * If the bug35388 workaround is enabled, then use an indirect access
127 * method to avoid unsafe EVQ writes.
129 rc = efx_mcdi_set_workaround(enp, MC_CMD_WORKAROUND_BUG35388, B_TRUE,
131 if ((rc == 0) || (rc == EACCES))
132 encp->enc_bug35388_workaround = B_TRUE;
133 else if ((rc == ENOTSUP) || (rc == ENOENT))
134 encp->enc_bug35388_workaround = B_FALSE;
139 * If the bug41750 workaround is enabled, then do not test interrupts,
140 * as the test will fail (seen with Greenport controllers).
142 rc = efx_mcdi_set_workaround(enp, MC_CMD_WORKAROUND_BUG41750, B_TRUE,
145 encp->enc_bug41750_workaround = B_TRUE;
146 } else if (rc == EACCES) {
147 /* Assume a controller with 40G ports needs the workaround. */
148 if (epp->ep_default_adv_cap_mask & EFX_PHY_CAP_40000FDX)
149 encp->enc_bug41750_workaround = B_TRUE;
151 encp->enc_bug41750_workaround = B_FALSE;
152 } else if ((rc == ENOTSUP) || (rc == ENOENT)) {
153 encp->enc_bug41750_workaround = B_FALSE;
157 if (EFX_PCI_FUNCTION_IS_VF(encp)) {
158 /* Interrupt testing does not work for VFs. See bug50084. */
159 encp->enc_bug41750_workaround = B_TRUE;
163 * If the bug26807 workaround is enabled, then firmware has enabled
164 * support for chained multicast filters. Firmware will reset (FLR)
165 * functions which have filters in the hardware filter table when the
166 * workaround is enabled/disabled.
168 * We must recheck if the workaround is enabled after inserting the
169 * first hardware filter, in case it has been changed since this check.
171 rc = efx_mcdi_set_workaround(enp, MC_CMD_WORKAROUND_BUG26807,
174 encp->enc_bug26807_workaround = B_TRUE;
175 if (flags & (1 << MC_CMD_WORKAROUND_EXT_OUT_FLR_DONE_LBN)) {
177 * Other functions had installed filters before the
178 * workaround was enabled, and they have been reset
181 EFSYS_PROBE(bug26807_workaround_flr_done);
182 /* FIXME: bump MC warm boot count ? */
184 } else if (rc == EACCES) {
186 * Unprivileged functions cannot enable the workaround in older
189 encp->enc_bug26807_workaround = B_FALSE;
190 } else if ((rc == ENOTSUP) || (rc == ENOENT)) {
191 encp->enc_bug26807_workaround = B_FALSE;
196 /* Get clock frequencies (in MHz). */
197 if ((rc = efx_mcdi_get_clock(enp, &sysclk, &dpcpu_clk)) != 0)
201 * The Huntington timer quantum is 1536 sysclk cycles, documented for
202 * the EV_TMR_VAL field of EV_TIMER_TBL. Scale for MHz and ns units.
204 encp->enc_evq_timer_quantum_ns = 1536000UL / sysclk; /* 1536 cycles */
205 if (encp->enc_bug35388_workaround) {
206 encp->enc_evq_timer_max_us = (encp->enc_evq_timer_quantum_ns <<
207 ERF_DD_EVQ_IND_TIMER_VAL_WIDTH) / 1000;
209 encp->enc_evq_timer_max_us = (encp->enc_evq_timer_quantum_ns <<
210 FRF_CZ_TC_TIMER_VAL_WIDTH) / 1000;
213 encp->enc_bug61265_workaround = B_FALSE; /* Medford only */
215 /* Check capabilities of running datapath firmware */
216 if ((rc = ef10_get_datapath_caps(enp)) != 0)
219 /* Alignment for receive packet DMA buffers */
220 encp->enc_rx_buf_align_start = 1;
221 encp->enc_rx_buf_align_end = 64; /* RX DMA end padding */
223 /* Alignment for WPTR updates */
224 encp->enc_rx_push_align = EF10_RX_WPTR_ALIGN;
227 * Maximum number of exclusive RSS contexts which can be allocated. The
228 * hardware supports 64, but 6 are reserved for shared contexts. They
229 * are a global resource so not all may be available.
231 encp->enc_rx_scale_max_exclusive_contexts = 58;
233 encp->enc_tx_dma_desc_size_max = EFX_MASK32(ESF_DZ_RX_KER_BYTE_CNT);
234 /* No boundary crossing limits */
235 encp->enc_tx_dma_desc_boundary = 0;
238 * Set resource limits for MC_CMD_ALLOC_VIS. Note that we cannot use
239 * MC_CMD_GET_RESOURCE_LIMITS here as that reports the available
240 * resources (allocated to this PCIe function), which is zero until
241 * after we have allocated VIs.
243 encp->enc_evq_limit = 1024;
244 encp->enc_rxq_limit = EFX_RXQ_LIMIT_TARGET;
245 encp->enc_txq_limit = EFX_TXQ_LIMIT_TARGET;
248 * The workaround for bug35388 uses the top bit of transmit queue
249 * descriptor writes, preventing the use of 4096 descriptor TXQs.
251 encp->enc_txq_max_ndescs = encp->enc_bug35388_workaround ? 2048 : 4096;
253 encp->enc_buftbl_limit = 0xFFFFFFFF;
255 EFX_STATIC_ASSERT(HUNT_PIOBUF_NBUFS <= EF10_MAX_PIOBUF_NBUFS);
256 encp->enc_piobuf_limit = HUNT_PIOBUF_NBUFS;
257 encp->enc_piobuf_size = HUNT_PIOBUF_SIZE;
258 encp->enc_piobuf_min_alloc_size = HUNT_MIN_PIO_ALLOC_SIZE;
261 * Get the current privilege mask. Note that this may be modified
262 * dynamically, so this value is informational only. DO NOT use
263 * the privilege mask to check for sufficient privileges, as that
264 * can result in time-of-check/time-of-use bugs.
266 if ((rc = ef10_get_privilege_mask(enp, &mask)) != 0)
268 encp->enc_privilege_mask = mask;
270 /* Get interrupt vector limits */
271 if ((rc = efx_mcdi_get_vector_cfg(enp, &base, &nvec, NULL)) != 0) {
272 if (EFX_PCI_FUNCTION_IS_PF(encp))
275 /* Ignore error (cannot query vector limits from a VF). */
279 encp->enc_intr_vec_base = base;
280 encp->enc_intr_limit = nvec;
283 * Maximum number of bytes into the frame the TCP header can start for
284 * firmware assisted TSO to work.
286 encp->enc_tx_tso_tcp_header_offset_limit = EF10_TCP_HEADER_OFFSET_LIMIT;
288 if ((rc = hunt_nic_get_required_pcie_bandwidth(enp, &bandwidth)) != 0)
290 encp->enc_required_pcie_bandwidth_mbps = bandwidth;
292 /* All Huntington devices have a PCIe Gen3, 8 lane connector */
293 encp->enc_max_pcie_link_gen = EFX_PCIE_LINK_SPEED_GEN3;
316 EFSYS_PROBE1(fail1, efx_rc_t, rc);
322 #endif /* EFSYS_OPT_HUNTINGTON */