Imported Upstream version 17.05

Change-Id: Id1e419c5a214e4a18739663b91f0f9a549f1fdc6
Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>

1 files changed, 402 insertions, 0 deletions

diff --git a/drivers/net/sfc/base/medford_nic.c b/drivers/net/sfc/base/medford_nic.c
new file mode 100644
index 00000000..07afac1e
--- /dev/null
+++ b/drivers/net/sfc/base/medford_nic.c
@@ -0,0 +1,402 @@
+/*
+ * Copyright (c) 2015-2016 Solarflare Communications Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and documentation are
+ * those of the authors and should not be interpreted as representing official
+ * policies, either expressed or implied, of the FreeBSD Project.
+ */
+
+#include "efx.h"
+#include "efx_impl.h"
+
+
+#if EFSYS_OPT_MEDFORD
+
+static	__checkReturn	efx_rc_t
+efx_mcdi_get_rxdp_config(
+	__in		efx_nic_t *enp,
+	__out		uint32_t *end_paddingp)
+{
+	efx_mcdi_req_t req;
+	uint8_t payload[MAX(MC_CMD_GET_RXDP_CONFIG_IN_LEN,
+			    MC_CMD_GET_RXDP_CONFIG_OUT_LEN)];
+	uint32_t end_padding;
+	efx_rc_t rc;
+
+	memset(payload, 0, sizeof (payload));
+	req.emr_cmd = MC_CMD_GET_RXDP_CONFIG;
+	req.emr_in_buf = payload;
+	req.emr_in_length = MC_CMD_GET_RXDP_CONFIG_IN_LEN;
+	req.emr_out_buf = payload;
+	req.emr_out_length = MC_CMD_GET_RXDP_CONFIG_OUT_LEN;
+
+	efx_mcdi_execute(enp, &req);
+	if (req.emr_rc != 0) {
+		rc = req.emr_rc;
+		goto fail1;
+	}
+
+	if (MCDI_OUT_DWORD_FIELD(req, GET_RXDP_CONFIG_OUT_DATA,
+				    GET_RXDP_CONFIG_OUT_PAD_HOST_DMA) == 0) {
+		/* RX DMA end padding is disabled */
+		end_padding = 0;
+	} else {
+		switch (MCDI_OUT_DWORD_FIELD(req, GET_RXDP_CONFIG_OUT_DATA,
+					    GET_RXDP_CONFIG_OUT_PAD_HOST_LEN)) {
+		case MC_CMD_SET_RXDP_CONFIG_IN_PAD_HOST_64:
+			end_padding = 64;
+			break;
+		case MC_CMD_SET_RXDP_CONFIG_IN_PAD_HOST_128:
+			end_padding = 128;
+			break;
+		case MC_CMD_SET_RXDP_CONFIG_IN_PAD_HOST_256:
+			end_padding = 256;
+			break;
+		default:
+			rc = ENOTSUP;
+			goto fail2;
+		}
+	}
+
+	*end_paddingp = end_padding;
+
+	return (0);
+
+fail2:
+	EFSYS_PROBE(fail2);
+fail1:
+	EFSYS_PROBE1(fail1, efx_rc_t, rc);
+
+	return (rc);
+}
+
+static	__checkReturn	efx_rc_t
+medford_nic_get_required_pcie_bandwidth(
+	__in		efx_nic_t *enp,
+	__out		uint32_t *bandwidth_mbpsp)
+{
+	uint32_t port_modes;
+	uint32_t current_mode;
+	uint32_t bandwidth;
+	efx_rc_t rc;
+
+	if ((rc = efx_mcdi_get_port_modes(enp, &port_modes,
+				    &current_mode)) != 0) {
+		/* No port mode info available. */
+		bandwidth = 0;
+		goto out;
+	}
+
+	if ((rc = ef10_nic_get_port_mode_bandwidth(current_mode,
+						    &bandwidth)) != 0)
+		goto fail1;
+
+out:
+	*bandwidth_mbpsp = bandwidth;
+
+	return (0);
+
+fail1:
+	EFSYS_PROBE1(fail1, efx_rc_t, rc);
+
+	return (rc);
+}
+
+	__checkReturn	efx_rc_t
+medford_board_cfg(
+	__in		efx_nic_t *enp)
+{
+	efx_mcdi_iface_t *emip = &(enp->en_mcdi.em_emip);
+	efx_nic_cfg_t *encp = &(enp->en_nic_cfg);
+	uint8_t mac_addr[6] = { 0 };
+	uint32_t board_type = 0;
+	ef10_link_state_t els;
+	efx_port_t *epp = &(enp->en_port);
+	uint32_t port;
+	uint32_t pf;
+	uint32_t vf;
+	uint32_t mask;
+	uint32_t sysclk, dpcpu_clk;
+	uint32_t base, nvec;
+	uint32_t end_padding;
+	uint32_t bandwidth;
+	efx_rc_t rc;
+
+	/*
+	 * FIXME: Likely to be incomplete and incorrect.
+	 * Parts of this should be shared with Huntington.
+	 */
+
+	if ((rc = efx_mcdi_get_port_assignment(enp, &port)) != 0)
+		goto fail1;
+
+	/*
+	 * NOTE: The MCDI protocol numbers ports from zero.
+	 * The common code MCDI interface numbers ports from one.
+	 */
+	emip->emi_port = port + 1;
+
+	if ((rc = ef10_external_port_mapping(enp, port,
+		    &encp->enc_external_port)) != 0)
+		goto fail2;
+
+	/*
+	 * Get PCIe function number from firmware (used for
+	 * per-function privilege and dynamic config info).
+	 *  - PCIe PF: pf = PF number, vf = 0xffff.
+	 *  - PCIe VF: pf = parent PF, vf = VF number.
+	 */
+	if ((rc = efx_mcdi_get_function_info(enp, &pf, &vf)) != 0)
+		goto fail3;
+
+	encp->enc_pf = pf;
+	encp->enc_vf = vf;
+
+	/* MAC address for this function */
+	if (EFX_PCI_FUNCTION_IS_PF(encp)) {
+		rc = efx_mcdi_get_mac_address_pf(enp, mac_addr);
+#if EFSYS_OPT_ALLOW_UNCONFIGURED_NIC
+		/* Disable static config checking for Medford NICs, ONLY
+		 * for manufacturing test and setup at the factory, to
+		 * allow the static config to be installed.
+		 */
+#else /* EFSYS_OPT_ALLOW_UNCONFIGURED_NIC */
+		if ((rc == 0) && (mac_addr[0] & 0x02)) {
+			/*
+			 * If the static config does not include a global MAC
+			 * address pool then the board may return a locally
+			 * administered MAC address (this should only happen on
+			 * incorrectly programmed boards).
+			 */
+			rc = EINVAL;
+		}
+#endif /* EFSYS_OPT_ALLOW_UNCONFIGURED_NIC */
+	} else {
+		rc = efx_mcdi_get_mac_address_vf(enp, mac_addr);
+	}
+	if (rc != 0)
+		goto fail4;
+
+	EFX_MAC_ADDR_COPY(encp->enc_mac_addr, mac_addr);
+
+	/* Board configuration */
+	rc = efx_mcdi_get_board_cfg(enp, &board_type, NULL, NULL);
+	if (rc != 0) {
+		/* Unprivileged functions may not be able to read board cfg */
+		if (rc == EACCES)
+			board_type = 0;
+		else
+			goto fail5;
+	}
+
+	encp->enc_board_type = board_type;
+	encp->enc_clk_mult = 1; /* not used for Medford */
+
+	/* Fill out fields in enp->en_port and enp->en_nic_cfg from MCDI */
+	if ((rc = efx_mcdi_get_phy_cfg(enp)) != 0)
+		goto fail6;
+
+	/* Obtain the default PHY advertised capabilities */
+	if ((rc = ef10_phy_get_link(enp, &els)) != 0)
+		goto fail7;
+	epp->ep_default_adv_cap_mask = els.els_adv_cap_mask;
+	epp->ep_adv_cap_mask = els.els_adv_cap_mask;
+
+	/*
+	 * Enable firmware workarounds for hardware errata.
+	 * Expected responses are:
+	 *  - 0 (zero):
+	 *	Success: workaround enabled or disabled as requested.
+	 *  - MC_CMD_ERR_ENOSYS (reported as ENOTSUP):
+	 *	Firmware does not support the MC_CMD_WORKAROUND request.
+	 *	(assume that the workaround is not supported).
+	 *  - MC_CMD_ERR_ENOENT (reported as ENOENT):
+	 *	Firmware does not support the requested workaround.
+	 *  - MC_CMD_ERR_EPERM  (reported as EACCES):
+	 *	Unprivileged function cannot enable/disable workarounds.
+	 *
+	 * See efx_mcdi_request_errcode() for MCDI error translations.
+	 */
+
+
+	if (EFX_PCI_FUNCTION_IS_VF(encp)) {
+		/*
+		 * Interrupt testing does not work for VFs. See bug50084.
+		 * FIXME: Does this still  apply to Medford?
+		 */
+		encp->enc_bug41750_workaround = B_TRUE;
+	}
+
+	/* Chained multicast is always enabled on Medford */
+	encp->enc_bug26807_workaround = B_TRUE;
+
+	/*
+	 * If the bug61265 workaround is enabled, then interrupt holdoff timers
+	 * cannot be controlled by timer table writes, so MCDI must be used
+	 * (timer table writes can still be used for wakeup timers).
+	 */
+	rc = efx_mcdi_set_workaround(enp, MC_CMD_WORKAROUND_BUG61265, B_TRUE,
+	    NULL);
+	if ((rc == 0) || (rc == EACCES))
+		encp->enc_bug61265_workaround = B_TRUE;
+	else if ((rc == ENOTSUP) || (rc == ENOENT))
+		encp->enc_bug61265_workaround = B_FALSE;
+	else
+		goto fail8;
+
+	/* Get clock frequencies (in MHz). */
+	if ((rc = efx_mcdi_get_clock(enp, &sysclk, &dpcpu_clk)) != 0)
+		goto fail9;
+
+	/*
+	 * The Medford timer quantum is 1536 dpcpu_clk cycles, documented for
+	 * the EV_TMR_VAL field of EV_TIMER_TBL. Scale for MHz and ns units.
+	 */
+	encp->enc_evq_timer_quantum_ns = 1536000UL / dpcpu_clk; /* 1536 cycles */
+	encp->enc_evq_timer_max_us = (encp->enc_evq_timer_quantum_ns <<
+		    FRF_CZ_TC_TIMER_VAL_WIDTH) / 1000;
+
+	/* Check capabilities of running datapath firmware */
+	if ((rc = ef10_get_datapath_caps(enp)) != 0)
+		goto fail10;
+
+	/* Alignment for receive packet DMA buffers */
+	encp->enc_rx_buf_align_start = 1;
+
+	/* Get the RX DMA end padding alignment configuration */
+	if ((rc = efx_mcdi_get_rxdp_config(enp, &end_padding)) != 0) {
+		if (rc != EACCES)
+			goto fail11;
+
+		/* Assume largest tail padding size supported by hardware */
+		end_padding = 256;
+	}
+	encp->enc_rx_buf_align_end = end_padding;
+
+	/* Alignment for WPTR updates */
+	encp->enc_rx_push_align = EF10_RX_WPTR_ALIGN;
+
+	encp->enc_tx_dma_desc_size_max = EFX_MASK32(ESF_DZ_RX_KER_BYTE_CNT);
+	/* No boundary crossing limits */
+	encp->enc_tx_dma_desc_boundary = 0;
+
+	/*
+	 * Set resource limits for MC_CMD_ALLOC_VIS. Note that we cannot use
+	 * MC_CMD_GET_RESOURCE_LIMITS here as that reports the available
+	 * resources (allocated to this PCIe function), which is zero until
+	 * after we have allocated VIs.
+	 */
+	encp->enc_evq_limit = 1024;
+	encp->enc_rxq_limit = EFX_RXQ_LIMIT_TARGET;
+	encp->enc_txq_limit = EFX_TXQ_LIMIT_TARGET;
+
+	/*
+	 * The maximum supported transmit queue size is 2048. TXQs with 4096
+	 * descriptors are not supported as the top bit is used for vfifo
+	 * stuffing.
+	 */
+	encp->enc_txq_max_ndescs = 2048;
+
+	encp->enc_buftbl_limit = 0xFFFFFFFF;
+
+	encp->enc_piobuf_limit = MEDFORD_PIOBUF_NBUFS;
+	encp->enc_piobuf_size = MEDFORD_PIOBUF_SIZE;
+	encp->enc_piobuf_min_alloc_size = MEDFORD_MIN_PIO_ALLOC_SIZE;
+
+	/*
+	 * Get the current privilege mask. Note that this may be modified
+	 * dynamically, so this value is informational only. DO NOT use
+	 * the privilege mask to check for sufficient privileges, as that
+	 * can result in time-of-check/time-of-use bugs.
+	 */
+	if ((rc = ef10_get_privilege_mask(enp, &mask)) != 0)
+		goto fail12;
+	encp->enc_privilege_mask = mask;
+
+	/* Get interrupt vector limits */
+	if ((rc = efx_mcdi_get_vector_cfg(enp, &base, &nvec, NULL)) != 0) {
+		if (EFX_PCI_FUNCTION_IS_PF(encp))
+			goto fail13;
+
+		/* Ignore error (cannot query vector limits from a VF). */
+		base = 0;
+		nvec = 1024;
+	}
+	encp->enc_intr_vec_base = base;
+	encp->enc_intr_limit = nvec;
+
+	/*
+	 * Maximum number of bytes into the frame the TCP header can start for
+	 * firmware assisted TSO to work.
+	 */
+	encp->enc_tx_tso_tcp_header_offset_limit = EF10_TCP_HEADER_OFFSET_LIMIT;
+
+	/*
+	 * Medford stores a single global copy of VPD, not per-PF as on
+	 * Huntington.
+	 */
+	encp->enc_vpd_is_global = B_TRUE;
+
+	rc = medford_nic_get_required_pcie_bandwidth(enp, &bandwidth);
+	if (rc != 0)
+		goto fail14;
+	encp->enc_required_pcie_bandwidth_mbps = bandwidth;
+	encp->enc_max_pcie_link_gen = EFX_PCIE_LINK_SPEED_GEN3;
+
+	return (0);
+
+fail14:
+	EFSYS_PROBE(fail14);
+fail13:
+	EFSYS_PROBE(fail13);
+fail12:
+	EFSYS_PROBE(fail12);
+fail11:
+	EFSYS_PROBE(fail11);
+fail10:
+	EFSYS_PROBE(fail10);
+fail9:
+	EFSYS_PROBE(fail9);
+fail8:
+	EFSYS_PROBE(fail8);
+fail7:
+	EFSYS_PROBE(fail7);
+fail6:
+	EFSYS_PROBE(fail6);
+fail5:
+	EFSYS_PROBE(fail5);
+fail4:
+	EFSYS_PROBE(fail4);
+fail3:
+	EFSYS_PROBE(fail3);
+fail2:
+	EFSYS_PROBE(fail2);
+fail1:
+	EFSYS_PROBE1(fail1, efx_rc_t, rc);
+
+	return (rc);
+}
+
+#endif	/* EFSYS_OPT_MEDFORD */