Add support of Cavium Liquidio ethernet adapters

Following patch V8 adds support for Cavium Liquidio pci express
based 10Gig ethernet adapters.
1) Consolidated all debug macros to either call dev_* or
   netdev_* macros directly, feedback from previous patch.
2) Changed soft commands to avoid crash when running
   in interrupt context.
3) Fixed link status not reflecting correct status when NetworkManager
   is running. Added MODULE_FIRMWARE declarations.

Following were the previous patches.
Patch V7:
1) Minor comments from v6 release regarding debug statements.
2) Fix for large multicast lists.
3) Fixed lockup issue if port initialization fails.
4) Enabled MSI by default.
https://patchwork.ozlabs.org/patch/464441/

Patch V6:
1) Addressed the uint64 vs u64 issue, feedback from previous patch.
2) Consolidated some receive processing routines.
3) Removed link status polling method.
https://patchwork.ozlabs.org/patch/459514/

Patch V5:
Based on the feedback from earlier patches with regards to
consolidation of common functions like device init, register
programming for cn66xx and cn68xx devices.
https://patchwork.ozlabs.org/patch/438979/

Patch V4:
Following were the changes based on the feedback from earlier patch:
1) Added mmiowb while synchronizing queue updates and other hw
   interactions.
2) Statistics will now be incremented non-atomically per each ring.
   liquidio_get_stats will add stats of each ring while reporting the
   total statistics counts.
3) Modified liquidio_ioctl  to return proper return codes.
4) Modified device naming to use standard Ethernet naming.
5) Global function names in the driver will have lio_/liquidio_/octeon_
   prefix.
6) Ethtool related changes for:
   Removed redundant stats and jiffies.
   Use default ethtool handler of link status.
   Speed setting will make use of ethtool_cmd_speed_set.
7) Added checks for pci_map_*  return codes.
8) Check for signals while waiting in interruptible mode
https://patchwork.ozlabs.org/patch/435073/

Patch v3:
Implemented feedback from previous patch like:
Removed NAPI Config and DEBUG config options, added BQL and xmit_more
support.
https://patchwork.ozlabs.org/patch/422749/

Patch V2:
Implemented feedback from previous patch.
https://patchwork.ozlabs.org/patch/413539/

First Patch:
https://patchwork.ozlabs.org/patch/412946/

Signed-off-by: Derek Chickles <derek.chickles@caviumnetworks.com>
Signed-off-by: Satanand Burla <satananda.burla@caviumnetworks.com>
Signed-off-by: Felix Manlunas <felix.manlunas@caviumnetworks.com>
Signed-off-by: Robert Richter <Robert.Richter@caviumnetworks.com>
Signed-off-by: Aleksey Makarov <Aleksey.Makarov@caviumnetworks.com>
Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@caviumnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 198 insertions, 0 deletions

diff --git a/drivers/net/ethernet/cavium/liquidio/cn68xx_device.c b/drivers/net/ethernet/cavium/liquidio/cn68xx_device.c
new file mode 100644
index 000000000000..8e830d0c0754
--- /dev/null
+++ b/drivers/net/ethernet/cavium/liquidio/cn68xx_device.c
@@ -0,0 +1,198 @@
+/**********************************************************************
+* Author: Cavium, Inc.
+*
+* Contact: support@cavium.com
+*          Please include "LiquidIO" in the subject.
+*
+* Copyright (c) 2003-2015 Cavium, Inc.
+*
+* This file is free software; you can redistribute it and/or modify
+* it under the terms of the GNU General Public License, Version 2, as
+* published by the Free Software Foundation.
+*
+* This file is distributed in the hope that it will be useful, but
+* AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
+* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
+* NONINFRINGEMENT.  See the GNU General Public License for more
+* details.
+*
+* This file may also be available under a different license from Cavium.
+* Contact Cavium, Inc. for more information
+**********************************************************************/
+#include <linux/version.h>
+#include <linux/types.h>
+#include <linux/list.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/kthread.h>
+#include <linux/netdevice.h>
+#include "octeon_config.h"
+#include "liquidio_common.h"
+#include "octeon_droq.h"
+#include "octeon_iq.h"
+#include "response_manager.h"
+#include "octeon_device.h"
+#include "octeon_nic.h"
+#include "octeon_main.h"
+#include "octeon_network.h"
+#include "cn66xx_regs.h"
+#include "cn66xx_device.h"
+#include "cn68xx_regs.h"
+#include "cn68xx_device.h"
+#include "liquidio_image.h"
+#include "octeon_mem_ops.h"
+
+static void lio_cn68xx_set_dpi_regs(struct octeon_device *oct)
+{
+	u32 i;
+	u32 fifo_sizes[6] = { 3, 3, 1, 1, 1, 8 };
+
+	lio_pci_writeq(oct, CN6XXX_DPI_DMA_CTL_MASK, CN6XXX_DPI_DMA_CONTROL);
+	dev_dbg(&oct->pci_dev->dev, "DPI_DMA_CONTROL: 0x%016llx\n",
+		lio_pci_readq(oct, CN6XXX_DPI_DMA_CONTROL));
+
+	for (i = 0; i < 6; i++) {
+		/* Prevent service of instruction queue for all DMA engines
+		 * Engine 5 will remain 0. Engines 0 - 4 will be setup by
+		 * core.
+		 */
+		lio_pci_writeq(oct, 0, CN6XXX_DPI_DMA_ENG_ENB(i));
+		lio_pci_writeq(oct, fifo_sizes[i], CN6XXX_DPI_DMA_ENG_BUF(i));
+		dev_dbg(&oct->pci_dev->dev, "DPI_ENG_BUF%d: 0x%016llx\n", i,
+			lio_pci_readq(oct, CN6XXX_DPI_DMA_ENG_BUF(i)));
+	}
+
+	/* DPI_SLI_PRT_CFG has MPS and MRRS settings that will be set
+	 * separately.
+	 */
+
+	lio_pci_writeq(oct, 1, CN6XXX_DPI_CTL);
+	dev_dbg(&oct->pci_dev->dev, "DPI_CTL: 0x%016llx\n",
+		lio_pci_readq(oct, CN6XXX_DPI_CTL));
+}
+
+static int lio_cn68xx_soft_reset(struct octeon_device *oct)
+{
+	lio_cn6xxx_soft_reset(oct);
+	lio_cn68xx_set_dpi_regs(oct);
+
+	return 0;
+}
+
+static void lio_cn68xx_setup_pkt_ctl_regs(struct octeon_device *oct)
+{
+	struct octeon_cn6xxx *cn68xx = (struct octeon_cn6xxx *)oct->chip;
+	u64 pktctl, tx_pipe, max_oqs;
+
+	pktctl = octeon_read_csr64(oct, CN6XXX_SLI_PKT_CTL);
+
+	/* 68XX specific */
+	max_oqs = CFG_GET_OQ_MAX_Q(CHIP_FIELD(oct, cn6xxx, conf));
+	tx_pipe  = octeon_read_csr64(oct, CN68XX_SLI_TX_PIPE);
+	tx_pipe &= 0xffffffffff00ffffULL; /* clear out NUMP field */
+	tx_pipe |= max_oqs << 16; /* put max_oqs in NUMP field */
+	octeon_write_csr64(oct, CN68XX_SLI_TX_PIPE, tx_pipe);
+
+	if (CFG_GET_IS_SLI_BP_ON(cn68xx->conf))
+		pktctl |= 0xF;
+	else
+		/* Disable per-port backpressure. */
+		pktctl &= ~0xF;
+	octeon_write_csr64(oct, CN6XXX_SLI_PKT_CTL, pktctl);
+}
+
+static int lio_cn68xx_setup_device_regs(struct octeon_device *oct)
+{
+	lio_cn6xxx_setup_pcie_mps(oct, PCIE_MPS_DEFAULT);
+	lio_cn6xxx_setup_pcie_mrrs(oct, PCIE_MRRS_256B);
+	lio_cn6xxx_enable_error_reporting(oct);
+
+	lio_cn6xxx_setup_global_input_regs(oct);
+	lio_cn68xx_setup_pkt_ctl_regs(oct);
+	lio_cn6xxx_setup_global_output_regs(oct);
+
+	/* Default error timeout value should be 0x200000 to avoid host hang
+	 * when reads invalid register
+	 */
+	octeon_write_csr64(oct, CN6XXX_SLI_WINDOW_CTL, 0x200000ULL);
+
+	return 0;
+}
+
+static inline void lio_cn68xx_vendor_message_fix(struct octeon_device *oct)
+{
+	u32 val = 0;
+
+	/* Set M_VEND1_DRP and M_VEND0_DRP bits */
+	pci_read_config_dword(oct->pci_dev, CN6XXX_PCIE_FLTMSK, &val);
+	val |= 0x3;
+	pci_write_config_dword(oct->pci_dev, CN6XXX_PCIE_FLTMSK, val);
+}
+
+int lio_is_210nv(struct octeon_device *oct)
+{
+	u64 mio_qlm4_cfg = lio_pci_readq(oct, CN6XXX_MIO_QLM4_CFG);
+
+	return ((mio_qlm4_cfg & CN6XXX_MIO_QLM_CFG_MASK) == 0);
+}
+
+int lio_setup_cn68xx_octeon_device(struct octeon_device *oct)
+{
+	struct octeon_cn6xxx *cn68xx = (struct octeon_cn6xxx *)oct->chip;
+	u16 card_type = LIO_410NV;
+
+	if (octeon_map_pci_barx(oct, 0, 0))
+		return 1;
+
+	if (octeon_map_pci_barx(oct, 1, MAX_BAR1_IOREMAP_SIZE)) {
+		dev_err(&oct->pci_dev->dev, "%s CN68XX BAR1 map failed\n",
+			__func__);
+		octeon_unmap_pci_barx(oct, 0);
+		return 1;
+	}
+
+	spin_lock_init(&cn68xx->lock_for_droq_int_enb_reg);
+
+	oct->fn_list.setup_iq_regs = lio_cn6xxx_setup_iq_regs;
+	oct->fn_list.setup_oq_regs = lio_cn6xxx_setup_oq_regs;
+
+	oct->fn_list.process_interrupt_regs = lio_cn6xxx_process_interrupt_regs;
+	oct->fn_list.soft_reset = lio_cn68xx_soft_reset;
+	oct->fn_list.setup_device_regs = lio_cn68xx_setup_device_regs;
+	oct->fn_list.reinit_regs = lio_cn6xxx_reinit_regs;
+	oct->fn_list.update_iq_read_idx = lio_cn6xxx_update_read_index;
+
+	oct->fn_list.bar1_idx_setup = lio_cn6xxx_bar1_idx_setup;
+	oct->fn_list.bar1_idx_write = lio_cn6xxx_bar1_idx_write;
+	oct->fn_list.bar1_idx_read = lio_cn6xxx_bar1_idx_read;
+
+	oct->fn_list.enable_interrupt = lio_cn6xxx_enable_interrupt;
+	oct->fn_list.disable_interrupt = lio_cn6xxx_disable_interrupt;
+
+	oct->fn_list.enable_io_queues = lio_cn6xxx_enable_io_queues;
+	oct->fn_list.disable_io_queues = lio_cn6xxx_disable_io_queues;
+
+	lio_cn6xxx_setup_reg_address(oct, oct->chip, &oct->reg_list);
+
+	/* Determine variant of card */
+	if (lio_is_210nv(oct))
+		card_type = LIO_210NV;
+
+	cn68xx->conf = (struct octeon_config *)
+		       oct_get_config_info(oct, card_type);
+	if (!cn68xx->conf) {
+		dev_err(&oct->pci_dev->dev, "%s No Config found for CN68XX %s\n",
+			__func__,
+			(card_type == LIO_410NV) ? LIO_410NV_NAME :
+			LIO_210NV_NAME);
+		octeon_unmap_pci_barx(oct, 0);
+		octeon_unmap_pci_barx(oct, 1);
+		return 1;
+	}
+
+	oct->coproc_clock_rate = 1000000ULL * lio_cn6xxx_coprocessor_clock(oct);
+
+	lio_cn68xx_vendor_message_fix(oct);
+
+	return 0;
+}