drivers/net/ethernet/cavium/liquidio/cn68xx_device.c

   1 /**********************************************************************
   2  * Author: Cavium, Inc.
   3  *
   4  * Contact: support@cavium.com
   5  *          Please include "LiquidIO" in the subject.
   6  *
   7  * Copyright (c) 2003-2016 Cavium, Inc.
   8  *
   9  * This file is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License, Version 2, as
  11  * published by the Free Software Foundation.
  12  *
  13  * This file is distributed in the hope that it will be useful, but
  14  * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
  15  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
  16  * NONINFRINGEMENT.  See the GNU General Public License for more details.
  17  ***********************************************************************/
  18 #include <linux/pci.h>
  19 #include <linux/netdevice.h>
  20 #include "liquidio_common.h"
  21 #include "octeon_droq.h"
  22 #include "octeon_iq.h"
  23 #include "response_manager.h"
  24 #include "octeon_device.h"
  25 #include "octeon_main.h"
  26 #include "cn66xx_regs.h"
  27 #include "cn66xx_device.h"
  28 #include "cn68xx_regs.h"
  29
  30 static void lio_cn68xx_set_dpi_regs(struct octeon_device *oct)
  31 {
  32         u32 i;
  33         u32 fifo_sizes[6] = { 3, 3, 1, 1, 1, 8 };
  34
  35         lio_pci_writeq(oct, CN6XXX_DPI_DMA_CTL_MASK, CN6XXX_DPI_DMA_CONTROL);
  36         dev_dbg(&oct->pci_dev->dev, "DPI_DMA_CONTROL: 0x%016llx\n",
  37                 lio_pci_readq(oct, CN6XXX_DPI_DMA_CONTROL));
  38
  39         for (i = 0; i < 6; i++) {
  40                 /* Prevent service of instruction queue for all DMA engines
  41                  * Engine 5 will remain 0. Engines 0 - 4 will be setup by
  42                  * core.
  43                  */
  44                 lio_pci_writeq(oct, 0, CN6XXX_DPI_DMA_ENG_ENB(i));
  45                 lio_pci_writeq(oct, fifo_sizes[i], CN6XXX_DPI_DMA_ENG_BUF(i));
  46                 dev_dbg(&oct->pci_dev->dev, "DPI_ENG_BUF%d: 0x%016llx\n", i,
  47                         lio_pci_readq(oct, CN6XXX_DPI_DMA_ENG_BUF(i)));
  48         }
  49
  50         /* DPI_SLI_PRT_CFG has MPS and MRRS settings that will be set
  51          * separately.
  52          */
  53
  54         lio_pci_writeq(oct, 1, CN6XXX_DPI_CTL);
  55         dev_dbg(&oct->pci_dev->dev, "DPI_CTL: 0x%016llx\n",
  56                 lio_pci_readq(oct, CN6XXX_DPI_CTL));
  57 }
  58
  59 static int lio_cn68xx_soft_reset(struct octeon_device *oct)
  60 {
  61         lio_cn6xxx_soft_reset(oct);
  62         lio_cn68xx_set_dpi_regs(oct);
  63
  64         return 0;
  65 }
  66
  67 static void lio_cn68xx_setup_pkt_ctl_regs(struct octeon_device *oct)
  68 {
  69         struct octeon_cn6xxx *cn68xx = (struct octeon_cn6xxx *)oct->chip;
  70         u64 pktctl, tx_pipe, max_oqs;
  71
  72         pktctl = octeon_read_csr64(oct, CN6XXX_SLI_PKT_CTL);
  73
  74         /* 68XX specific */
  75         max_oqs = CFG_GET_OQ_MAX_Q(CHIP_CONF(oct, cn6xxx));
  76         tx_pipe  = octeon_read_csr64(oct, CN68XX_SLI_TX_PIPE);
  77         tx_pipe &= 0xffffffffff00ffffULL; /* clear out NUMP field */
  78         tx_pipe |= max_oqs << 16; /* put max_oqs in NUMP field */
  79         octeon_write_csr64(oct, CN68XX_SLI_TX_PIPE, tx_pipe);
  80
  81         if (CFG_GET_IS_SLI_BP_ON(cn68xx->conf))
  82                 pktctl |= 0xF;
  83         else
  84                 /* Disable per-port backpressure. */
  85                 pktctl &= ~0xF;
  86         octeon_write_csr64(oct, CN6XXX_SLI_PKT_CTL, pktctl);
  87 }
  88
  89 static int lio_cn68xx_setup_device_regs(struct octeon_device *oct)
  90 {
  91         lio_cn6xxx_setup_pcie_mps(oct, PCIE_MPS_DEFAULT);
  92         lio_cn6xxx_setup_pcie_mrrs(oct, PCIE_MRRS_256B);
  93         lio_cn6xxx_enable_error_reporting(oct);
  94
  95         lio_cn6xxx_setup_global_input_regs(oct);
  96         lio_cn68xx_setup_pkt_ctl_regs(oct);
  97         lio_cn6xxx_setup_global_output_regs(oct);
  98
  99         /* Default error timeout value should be 0x200000 to avoid host hang
 100          * when reads invalid register
 101          */
 102         octeon_write_csr64(oct, CN6XXX_SLI_WINDOW_CTL, 0x200000ULL);
 103
 104         return 0;
 105 }
 106
 107 static inline void lio_cn68xx_vendor_message_fix(struct octeon_device *oct)
 108 {
 109         u32 val = 0;
 110
 111         /* Set M_VEND1_DRP and M_VEND0_DRP bits */
 112         pci_read_config_dword(oct->pci_dev, CN6XXX_PCIE_FLTMSK, &val);
 113         val |= 0x3;
 114         pci_write_config_dword(oct->pci_dev, CN6XXX_PCIE_FLTMSK, val);
 115 }
 116
 117 static int lio_is_210nv(struct octeon_device *oct)
 118 {
 119         u64 mio_qlm4_cfg = lio_pci_readq(oct, CN6XXX_MIO_QLM4_CFG);
 120
 121         return ((mio_qlm4_cfg & CN6XXX_MIO_QLM_CFG_MASK) == 0);
 122 }
 123
 124 int lio_setup_cn68xx_octeon_device(struct octeon_device *oct)
 125 {
 126         struct octeon_cn6xxx *cn68xx = (struct octeon_cn6xxx *)oct->chip;
 127         u16 card_type = LIO_410NV;
 128
 129         if (octeon_map_pci_barx(oct, 0, 0))
 130                 return 1;
 131
 132         if (octeon_map_pci_barx(oct, 1, MAX_BAR1_IOREMAP_SIZE)) {
 133                 dev_err(&oct->pci_dev->dev, "%s CN68XX BAR1 map failed\n",
 134                         __func__);
 135                 octeon_unmap_pci_barx(oct, 0);
 136                 return 1;
 137         }
 138
 139         spin_lock_init(&cn68xx->lock_for_droq_int_enb_reg);
 140
 141         oct->fn_list.setup_iq_regs = lio_cn6xxx_setup_iq_regs;
 142         oct->fn_list.setup_oq_regs = lio_cn6xxx_setup_oq_regs;
 143
 144         oct->fn_list.process_interrupt_regs = lio_cn6xxx_process_interrupt_regs;
 145         oct->fn_list.soft_reset = lio_cn68xx_soft_reset;
 146         oct->fn_list.setup_device_regs = lio_cn68xx_setup_device_regs;
 147         oct->fn_list.update_iq_read_idx = lio_cn6xxx_update_read_index;
 148
 149         oct->fn_list.bar1_idx_setup = lio_cn6xxx_bar1_idx_setup;
 150         oct->fn_list.bar1_idx_write = lio_cn6xxx_bar1_idx_write;
 151         oct->fn_list.bar1_idx_read = lio_cn6xxx_bar1_idx_read;
 152
 153         oct->fn_list.enable_interrupt = lio_cn6xxx_enable_interrupt;
 154         oct->fn_list.disable_interrupt = lio_cn6xxx_disable_interrupt;
 155
 156         oct->fn_list.enable_io_queues = lio_cn6xxx_enable_io_queues;
 157         oct->fn_list.disable_io_queues = lio_cn6xxx_disable_io_queues;
 158
 159         lio_cn6xxx_setup_reg_address(oct, oct->chip, &oct->reg_list);
 160
 161         /* Determine variant of card */
 162         if (lio_is_210nv(oct))
 163                 card_type = LIO_210NV;
 164
 165         cn68xx->conf = (struct octeon_config *)
 166                        oct_get_config_info(oct, card_type);
 167         if (!cn68xx->conf) {
 168                 dev_err(&oct->pci_dev->dev, "%s No Config found for CN68XX %s\n",
 169                         __func__,
 170                         (card_type == LIO_410NV) ? LIO_410NV_NAME :
 171                         LIO_210NV_NAME);
 172                 octeon_unmap_pci_barx(oct, 0);
 173                 octeon_unmap_pci_barx(oct, 1);
 174                 return 1;
 175         }
 176
 177         oct->coproc_clock_rate = 1000000ULL * lio_cn6xxx_coprocessor_clock(oct);
 178
 179         lio_cn68xx_vendor_message_fix(oct);
 180
 181         return 0;
 182 }