This source file includes following definitions.
- dw_edma_pcie_probe
- dw_edma_pcie_remove
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9 #include <linux/kernel.h>
10 #include <linux/module.h>
11 #include <linux/pci.h>
12 #include <linux/device.h>
13 #include <linux/dma/edma.h>
14 #include <linux/pci-epf.h>
15 #include <linux/msi.h>
16
17 #include "dw-edma-core.h"
18
19 struct dw_edma_pcie_data {
20
21 enum pci_barno rg_bar;
22 off_t rg_off;
23 size_t rg_sz;
24
25 enum pci_barno ll_bar;
26 off_t ll_off;
27 size_t ll_sz;
28
29 enum pci_barno dt_bar;
30 off_t dt_off;
31 size_t dt_sz;
32
33 u32 version;
34 enum dw_edma_mode mode;
35 u8 irqs;
36 };
37
38 static const struct dw_edma_pcie_data snps_edda_data = {
39
40 .rg_bar = BAR_0,
41 .rg_off = 0x00001000,
42 .rg_sz = 0x00002000,
43
44 .ll_bar = BAR_2,
45 .ll_off = 0x00000000,
46 .ll_sz = 0x00800000,
47
48 .dt_bar = BAR_2,
49 .dt_off = 0x00800000,
50 .dt_sz = 0x03800000,
51
52 .version = 0,
53 .mode = EDMA_MODE_UNROLL,
54 .irqs = 1,
55 };
56
57 static int dw_edma_pcie_probe(struct pci_dev *pdev,
58 const struct pci_device_id *pid)
59 {
60 const struct dw_edma_pcie_data *pdata = (void *)pid->driver_data;
61 struct device *dev = &pdev->dev;
62 struct dw_edma_chip *chip;
63 int err, nr_irqs;
64 struct dw_edma *dw;
65
66
67 err = pcim_enable_device(pdev);
68 if (err) {
69 pci_err(pdev, "enabling device failed\n");
70 return err;
71 }
72
73
74 err = pcim_iomap_regions(pdev, BIT(pdata->rg_bar) |
75 BIT(pdata->ll_bar) |
76 BIT(pdata->dt_bar),
77 pci_name(pdev));
78 if (err) {
79 pci_err(pdev, "eDMA BAR I/O remapping failed\n");
80 return err;
81 }
82
83 pci_set_master(pdev);
84
85
86 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
87 if (!err) {
88 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
89 if (err) {
90 pci_err(pdev, "consistent DMA mask 64 set failed\n");
91 return err;
92 }
93 } else {
94 pci_err(pdev, "DMA mask 64 set failed\n");
95
96 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
97 if (err) {
98 pci_err(pdev, "DMA mask 32 set failed\n");
99 return err;
100 }
101
102 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
103 if (err) {
104 pci_err(pdev, "consistent DMA mask 32 set failed\n");
105 return err;
106 }
107 }
108
109
110 chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
111 if (!chip)
112 return -ENOMEM;
113
114 dw = devm_kzalloc(dev, sizeof(*dw), GFP_KERNEL);
115 if (!dw)
116 return -ENOMEM;
117
118
119 nr_irqs = pci_alloc_irq_vectors(pdev, 1, pdata->irqs,
120 PCI_IRQ_MSI | PCI_IRQ_MSIX);
121 if (nr_irqs < 1) {
122 pci_err(pdev, "fail to alloc IRQ vector (number of IRQs=%u)\n",
123 nr_irqs);
124 return -EPERM;
125 }
126
127
128 chip->dw = dw;
129 chip->dev = dev;
130 chip->id = pdev->devfn;
131 chip->irq = pdev->irq;
132
133 dw->rg_region.vaddr = pcim_iomap_table(pdev)[pdata->rg_bar];
134 dw->rg_region.vaddr += pdata->rg_off;
135 dw->rg_region.paddr = pdev->resource[pdata->rg_bar].start;
136 dw->rg_region.paddr += pdata->rg_off;
137 dw->rg_region.sz = pdata->rg_sz;
138
139 dw->ll_region.vaddr = pcim_iomap_table(pdev)[pdata->ll_bar];
140 dw->ll_region.vaddr += pdata->ll_off;
141 dw->ll_region.paddr = pdev->resource[pdata->ll_bar].start;
142 dw->ll_region.paddr += pdata->ll_off;
143 dw->ll_region.sz = pdata->ll_sz;
144
145 dw->dt_region.vaddr = pcim_iomap_table(pdev)[pdata->dt_bar];
146 dw->dt_region.vaddr += pdata->dt_off;
147 dw->dt_region.paddr = pdev->resource[pdata->dt_bar].start;
148 dw->dt_region.paddr += pdata->dt_off;
149 dw->dt_region.sz = pdata->dt_sz;
150
151 dw->version = pdata->version;
152 dw->mode = pdata->mode;
153 dw->nr_irqs = nr_irqs;
154
155
156 pci_dbg(pdev, "Version:\t%u\n", dw->version);
157
158 pci_dbg(pdev, "Mode:\t%s\n",
159 dw->mode == EDMA_MODE_LEGACY ? "Legacy" : "Unroll");
160
161 pci_dbg(pdev, "Registers:\tBAR=%u, off=0x%.8lx, sz=0x%zx bytes, addr(v=%p, p=%pa)\n",
162 pdata->rg_bar, pdata->rg_off, pdata->rg_sz,
163 dw->rg_region.vaddr, &dw->rg_region.paddr);
164
165 pci_dbg(pdev, "L. List:\tBAR=%u, off=0x%.8lx, sz=0x%zx bytes, addr(v=%p, p=%pa)\n",
166 pdata->ll_bar, pdata->ll_off, pdata->ll_sz,
167 dw->ll_region.vaddr, &dw->ll_region.paddr);
168
169 pci_dbg(pdev, "Data:\tBAR=%u, off=0x%.8lx, sz=0x%zx bytes, addr(v=%p, p=%pa)\n",
170 pdata->dt_bar, pdata->dt_off, pdata->dt_sz,
171 dw->dt_region.vaddr, &dw->dt_region.paddr);
172
173 pci_dbg(pdev, "Nr. IRQs:\t%u\n", dw->nr_irqs);
174
175
176 if (!pci_dev_msi_enabled(pdev)) {
177 pci_err(pdev, "enable interrupt failed\n");
178 return -EPERM;
179 }
180
181 dw->irq = devm_kcalloc(dev, nr_irqs, sizeof(*dw->irq), GFP_KERNEL);
182 if (!dw->irq)
183 return -ENOMEM;
184
185
186 err = dw_edma_probe(chip);
187 if (err) {
188 pci_err(pdev, "eDMA probe failed\n");
189 return err;
190 }
191
192
193 pci_set_drvdata(pdev, chip);
194
195 return 0;
196 }
197
198 static void dw_edma_pcie_remove(struct pci_dev *pdev)
199 {
200 struct dw_edma_chip *chip = pci_get_drvdata(pdev);
201 int err;
202
203
204 err = dw_edma_remove(chip);
205 if (err)
206 pci_warn(pdev, "can't remove device properly: %d\n", err);
207
208
209 pci_free_irq_vectors(pdev);
210 }
211
212 static const struct pci_device_id dw_edma_pcie_id_table[] = {
213 { PCI_DEVICE_DATA(SYNOPSYS, EDDA, &snps_edda_data) },
214 { }
215 };
216 MODULE_DEVICE_TABLE(pci, dw_edma_pcie_id_table);
217
218 static struct pci_driver dw_edma_pcie_driver = {
219 .name = "dw-edma-pcie",
220 .id_table = dw_edma_pcie_id_table,
221 .probe = dw_edma_pcie_probe,
222 .remove = dw_edma_pcie_remove,
223 };
224
225 module_pci_driver(dw_edma_pcie_driver);
226
227 MODULE_LICENSE("GPL v2");
228 MODULE_DESCRIPTION("Synopsys DesignWare eDMA PCIe driver");
229 MODULE_AUTHOR("Gustavo Pimentel <gustavo.pimentel@synopsys.com>");