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
common_default_data(struct plat_stmmacenet_data * plat)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
stmmac_default_data(struct pci_dev * pdev,struct plat_stmmacenet_data * plat)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
snps_gmac5_default_data(struct pci_dev * pdev,struct plat_stmmacenet_data * plat)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->flags |= STMMAC_FLAG_TSO_EN;
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 */
stmmac_pci_probe(struct pci_dev * pdev,const struct pci_device_id * id)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 plat->safety_feat_cfg = devm_kzalloc(&pdev->dev,
178 sizeof(*plat->safety_feat_cfg),
179 GFP_KERNEL);
180 if (!plat->safety_feat_cfg)
181 return -ENOMEM;
182
183 /* Enable pci device */
184 ret = pcim_enable_device(pdev);
185 if (ret) {
186 dev_err(&pdev->dev, "%s: ERROR: failed to enable device\n",
187 __func__);
188 return ret;
189 }
190
191 /* Get the base address of device */
192 for (i = 0; i < PCI_STD_NUM_BARS; i++) {
193 if (pci_resource_len(pdev, i) == 0)
194 continue;
195 ret = pcim_iomap_regions(pdev, BIT(i), pci_name(pdev));
196 if (ret)
197 return ret;
198 break;
199 }
200
201 pci_set_master(pdev);
202
203 ret = info->setup(pdev, plat);
204 if (ret)
205 return ret;
206
207 memset(&res, 0, sizeof(res));
208 res.addr = pcim_iomap_table(pdev)[i];
209 res.wol_irq = pdev->irq;
210 res.irq = pdev->irq;
211
212 plat->safety_feat_cfg->tsoee = 1;
213 plat->safety_feat_cfg->mrxpee = 1;
214 plat->safety_feat_cfg->mestee = 1;
215 plat->safety_feat_cfg->mrxee = 1;
216 plat->safety_feat_cfg->mtxee = 1;
217 plat->safety_feat_cfg->epsi = 1;
218 plat->safety_feat_cfg->edpp = 1;
219 plat->safety_feat_cfg->prtyen = 1;
220 plat->safety_feat_cfg->tmouten = 1;
221
222 return stmmac_dvr_probe(&pdev->dev, plat, &res);
223 }
224
225 /**
226 * stmmac_pci_remove
227 *
228 * @pdev: platform device pointer
229 * Description: this function calls the main to free the net resources
230 * and releases the PCI resources.
231 */
stmmac_pci_remove(struct pci_dev * pdev)232 static void stmmac_pci_remove(struct pci_dev *pdev)
233 {
234 int i;
235
236 stmmac_dvr_remove(&pdev->dev);
237
238 for (i = 0; i < PCI_STD_NUM_BARS; i++) {
239 if (pci_resource_len(pdev, i) == 0)
240 continue;
241 pcim_iounmap_regions(pdev, BIT(i));
242 break;
243 }
244 }
245
stmmac_pci_suspend(struct device * dev)246 static int __maybe_unused stmmac_pci_suspend(struct device *dev)
247 {
248 struct pci_dev *pdev = to_pci_dev(dev);
249 int ret;
250
251 ret = stmmac_suspend(dev);
252 if (ret)
253 return ret;
254
255 ret = pci_save_state(pdev);
256 if (ret)
257 return ret;
258
259 pci_disable_device(pdev);
260 pci_wake_from_d3(pdev, true);
261 return 0;
262 }
263
stmmac_pci_resume(struct device * dev)264 static int __maybe_unused stmmac_pci_resume(struct device *dev)
265 {
266 struct pci_dev *pdev = to_pci_dev(dev);
267 int ret;
268
269 pci_restore_state(pdev);
270 pci_set_power_state(pdev, PCI_D0);
271
272 ret = pci_enable_device(pdev);
273 if (ret)
274 return ret;
275
276 pci_set_master(pdev);
277
278 return stmmac_resume(dev);
279 }
280
281 static SIMPLE_DEV_PM_OPS(stmmac_pm_ops, stmmac_pci_suspend, stmmac_pci_resume);
282
283 /* synthetic ID, no official vendor */
284 #define PCI_VENDOR_ID_STMMAC 0x0700
285
286 #define PCI_DEVICE_ID_STMMAC_STMMAC 0x1108
287 #define PCI_DEVICE_ID_SYNOPSYS_GMAC5_ID 0x7102
288
289 static const struct pci_device_id stmmac_id_table[] = {
290 { PCI_DEVICE_DATA(STMMAC, STMMAC, &stmmac_pci_info) },
291 { PCI_DEVICE_DATA(STMICRO, MAC, &stmmac_pci_info) },
292 { PCI_DEVICE_DATA(SYNOPSYS, GMAC5_ID, &snps_gmac5_pci_info) },
293 {}
294 };
295
296 MODULE_DEVICE_TABLE(pci, stmmac_id_table);
297
298 static struct pci_driver stmmac_pci_driver = {
299 .name = STMMAC_RESOURCE_NAME,
300 .id_table = stmmac_id_table,
301 .probe = stmmac_pci_probe,
302 .remove = stmmac_pci_remove,
303 .driver = {
304 .pm = &stmmac_pm_ops,
305 },
306 };
307
308 module_pci_driver(stmmac_pci_driver);
309
310 MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet PCI driver");
311 MODULE_AUTHOR("Rayagond Kokatanur <rayagond.kokatanur@vayavyalabs.com>");
312 MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
313 MODULE_LICENSE("GPL");
314