drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*******************************************************************************
   3   This contains the functions to handle the pci driver.
   4
   5   Copyright (C) 2011-2012  Vayavya Labs Pvt Ltd
   6
   7
   8   Author: Rayagond Kokatanur <rayagond@vayavyalabs.com>
   9   Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
  10 *******************************************************************************/
  11
  12 #include <linux/clk-provider.h>
  13 #include <linux/pci.h>
  14 #include <linux/dmi.h>
  15
  16 #include "stmmac.h"
  17
  18 struct stmmac_pci_info {
  19         int (*setup)(struct pci_dev *pdev, struct plat_stmmacenet_data *plat);
  20 };
  21
  22 static void common_default_data(struct plat_stmmacenet_data *plat)
  23 {
  24         plat->clk_csr = 2;      /* clk_csr_i = 20-35MHz & MDC = clk_csr_i/16 */
  25         plat->has_gmac = 1;
  26         plat->force_sf_dma_mode = 1;
  27
  28         plat->mdio_bus_data->needs_reset = true;
  29
  30         /* Set default value for multicast hash bins */
  31         plat->multicast_filter_bins = HASH_TABLE_SIZE;
  32
  33         /* Set default value for unicast filter entries */
  34         plat->unicast_filter_entries = 1;
  35
  36         /* Set the maxmtu to a default of JUMBO_LEN */
  37         plat->maxmtu = JUMBO_LEN;
  38
  39         /* Set default number of RX and TX queues to use */
  40         plat->tx_queues_to_use = 1;
  41         plat->rx_queues_to_use = 1;
  42
  43         /* Disable Priority config by default */
  44         plat->tx_queues_cfg[0].use_prio = false;
  45         plat->rx_queues_cfg[0].use_prio = false;
  46
  47         /* Disable RX queues routing by default */
  48         plat->rx_queues_cfg[0].pkt_route = 0x0;
  49 }
  50
  51 static int stmmac_default_data(struct pci_dev *pdev,
  52                                struct plat_stmmacenet_data *plat)
  53 {
  54         /* Set common default data first */
  55         common_default_data(plat);
  56
  57         plat->bus_id = 1;
  58         plat->phy_addr = 0;
  59         plat->phy_interface = PHY_INTERFACE_MODE_GMII;
  60
  61         plat->dma_cfg->pbl = 32;
  62         plat->dma_cfg->pblx8 = true;
  63         /* TODO: AXI */
  64
  65         return 0;
  66 }
  67
  68 static const struct stmmac_pci_info stmmac_pci_info = {
  69         .setup = stmmac_default_data,
  70 };
  71
  72 static int snps_gmac5_default_data(struct pci_dev *pdev,
  73                                    struct plat_stmmacenet_data *plat)
  74 {
  75         int i;
  76
  77         plat->clk_csr = 5;
  78         plat->has_gmac4 = 1;
  79         plat->force_sf_dma_mode = 1;
  80         plat->tso_en = 1;
  81         plat->pmt = 1;
  82
  83         /* Set default value for multicast hash bins */
  84         plat->multicast_filter_bins = HASH_TABLE_SIZE;
  85
  86         /* Set default value for unicast filter entries */
  87         plat->unicast_filter_entries = 1;
  88
  89         /* Set the maxmtu to a default of JUMBO_LEN */
  90         plat->maxmtu = JUMBO_LEN;
  91
  92         /* Set default number of RX and TX queues to use */
  93         plat->tx_queues_to_use = 4;
  94         plat->rx_queues_to_use = 4;
  95
  96         plat->tx_sched_algorithm = MTL_TX_ALGORITHM_WRR;
  97         for (i = 0; i < plat->tx_queues_to_use; i++) {
  98                 plat->tx_queues_cfg[i].use_prio = false;
  99                 plat->tx_queues_cfg[i].mode_to_use = MTL_QUEUE_DCB;
 100                 plat->tx_queues_cfg[i].weight = 25;
 101                 if (i > 0)
 102                         plat->tx_queues_cfg[i].tbs_en = 1;
 103         }
 104
 105         plat->rx_sched_algorithm = MTL_RX_ALGORITHM_SP;
 106         for (i = 0; i < plat->rx_queues_to_use; i++) {
 107                 plat->rx_queues_cfg[i].use_prio = false;
 108                 plat->rx_queues_cfg[i].mode_to_use = MTL_QUEUE_DCB;
 109                 plat->rx_queues_cfg[i].pkt_route = 0x0;
 110                 plat->rx_queues_cfg[i].chan = i;
 111         }
 112
 113         plat->bus_id = 1;
 114         plat->phy_addr = -1;
 115         plat->phy_interface = PHY_INTERFACE_MODE_GMII;
 116
 117         plat->dma_cfg->pbl = 32;
 118         plat->dma_cfg->pblx8 = true;
 119
 120         /* Axi Configuration */
 121         plat->axi = devm_kzalloc(&pdev->dev, sizeof(*plat->axi), GFP_KERNEL);
 122         if (!plat->axi)
 123                 return -ENOMEM;
 124
 125         plat->axi->axi_wr_osr_lmt = 31;
 126         plat->axi->axi_rd_osr_lmt = 31;
 127
 128         plat->axi->axi_fb = false;
 129         plat->axi->axi_blen[0] = 4;
 130         plat->axi->axi_blen[1] = 8;
 131         plat->axi->axi_blen[2] = 16;
 132         plat->axi->axi_blen[3] = 32;
 133
 134         return 0;
 135 }
 136
 137 static const struct stmmac_pci_info snps_gmac5_pci_info = {
 138         .setup = snps_gmac5_default_data,
 139 };
 140
 141 /**
 142  * stmmac_pci_probe
 143  *
 144  * @pdev: pci device pointer
 145  * @id: pointer to table of device id/id's.
 146  *
 147  * Description: This probing function gets called for all PCI devices which
 148  * match the ID table and are not "owned" by other driver yet. This function
 149  * gets passed a "struct pci_dev *" for each device whose entry in the ID table
 150  * matches the device. The probe functions returns zero when the driver choose
 151  * to take "ownership" of the device or an error code(-ve no) otherwise.
 152  */
 153 static int stmmac_pci_probe(struct pci_dev *pdev,
 154                             const struct pci_device_id *id)
 155 {
 156         struct stmmac_pci_info *info = (struct stmmac_pci_info *)id->driver_data;
 157         struct plat_stmmacenet_data *plat;
 158         struct stmmac_resources res;
 159         int i;
 160         int ret;
 161
 162         plat = devm_kzalloc(&pdev->dev, sizeof(*plat), GFP_KERNEL);
 163         if (!plat)
 164                 return -ENOMEM;
 165
 166         plat->mdio_bus_data = devm_kzalloc(&pdev->dev,
 167                                            sizeof(*plat->mdio_bus_data),
 168                                            GFP_KERNEL);
 169         if (!plat->mdio_bus_data)
 170                 return -ENOMEM;
 171
 172         plat->dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*plat->dma_cfg),
 173                                      GFP_KERNEL);
 174         if (!plat->dma_cfg)
 175                 return -ENOMEM;
 176
 177         /* Enable pci device */
 178         ret = pci_enable_device(pdev);
 179         if (ret) {
 180                 dev_err(&pdev->dev, "%s: ERROR: failed to enable device\n",
 181                         __func__);
 182                 return ret;
 183         }
 184
 185         /* Get the base address of device */
 186         for (i = 0; i < PCI_STD_NUM_BARS; i++) {
 187                 if (pci_resource_len(pdev, i) == 0)
 188                         continue;
 189                 ret = pcim_iomap_regions(pdev, BIT(i), pci_name(pdev));
 190                 if (ret)
 191                         return ret;
 192                 break;
 193         }
 194
 195         pci_set_master(pdev);
 196
 197         ret = info->setup(pdev, plat);
 198         if (ret)
 199                 return ret;
 200
 201         pci_enable_msi(pdev);
 202
 203         memset(&res, 0, sizeof(res));
 204         res.addr = pcim_iomap_table(pdev)[i];
 205         res.wol_irq = pdev->irq;
 206         res.irq = pdev->irq;
 207
 208         return stmmac_dvr_probe(&pdev->dev, plat, &res);
 209 }
 210
 211 /**
 212  * stmmac_pci_remove
 213  *
 214  * @pdev: platform device pointer
 215  * Description: this function calls the main to free the net resources
 216  * and releases the PCI resources.
 217  */
 218 static void stmmac_pci_remove(struct pci_dev *pdev)
 219 {
 220         int i;
 221
 222         stmmac_dvr_remove(&pdev->dev);
 223
 224         for (i = 0; i < PCI_STD_NUM_BARS; i++) {
 225                 if (pci_resource_len(pdev, i) == 0)
 226                         continue;
 227                 pcim_iounmap_regions(pdev, BIT(i));
 228                 break;
 229         }
 230
 231         pci_disable_device(pdev);
 232 }
 233
 234 static int __maybe_unused stmmac_pci_suspend(struct device *dev)
 235 {
 236         struct pci_dev *pdev = to_pci_dev(dev);
 237         int ret;
 238
 239         ret = stmmac_suspend(dev);
 240         if (ret)
 241                 return ret;
 242
 243         ret = pci_save_state(pdev);
 244         if (ret)
 245                 return ret;
 246
 247         pci_disable_device(pdev);
 248         pci_wake_from_d3(pdev, true);
 249         return 0;
 250 }
 251
 252 static int __maybe_unused stmmac_pci_resume(struct device *dev)
 253 {
 254         struct pci_dev *pdev = to_pci_dev(dev);
 255         int ret;
 256
 257         pci_restore_state(pdev);
 258         pci_set_power_state(pdev, PCI_D0);
 259
 260         ret = pci_enable_device(pdev);
 261         if (ret)
 262                 return ret;
 263
 264         pci_set_master(pdev);
 265
 266         return stmmac_resume(dev);
 267 }
 268
 269 static SIMPLE_DEV_PM_OPS(stmmac_pm_ops, stmmac_pci_suspend, stmmac_pci_resume);
 270
 271 /* synthetic ID, no official vendor */
 272 #define PCI_VENDOR_ID_STMMAC            0x0700
 273
 274 #define PCI_DEVICE_ID_STMMAC_STMMAC             0x1108
 275 #define PCI_DEVICE_ID_SYNOPSYS_GMAC5_ID         0x7102
 276
 277 static const struct pci_device_id stmmac_id_table[] = {
 278         { PCI_DEVICE_DATA(STMMAC, STMMAC, &stmmac_pci_info) },
 279         { PCI_DEVICE_DATA(STMICRO, MAC, &stmmac_pci_info) },
 280         { PCI_DEVICE_DATA(SYNOPSYS, GMAC5_ID, &snps_gmac5_pci_info) },
 281         {}
 282 };
 283
 284 MODULE_DEVICE_TABLE(pci, stmmac_id_table);
 285
 286 static struct pci_driver stmmac_pci_driver = {
 287         .name = STMMAC_RESOURCE_NAME,
 288         .id_table = stmmac_id_table,
 289         .probe = stmmac_pci_probe,
 290         .remove = stmmac_pci_remove,
 291         .driver         = {
 292                 .pm     = &stmmac_pm_ops,
 293         },
 294 };
 295
 296 module_pci_driver(stmmac_pci_driver);
 297
 298 MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet PCI driver");
 299 MODULE_AUTHOR("Rayagond Kokatanur <rayagond.kokatanur@vayavyalabs.com>");
 300 MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
 301 MODULE_LICENSE("GPL");