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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
19struct 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
38static 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
57static int dw_edma_pcie_irq_vector(struct device *dev, unsigned int nr)
58{
59 return pci_irq_vector(to_pci_dev(dev), nr);
60}
61
62static const struct dw_edma_core_ops dw_edma_pcie_core_ops = {
63 .irq_vector = dw_edma_pcie_irq_vector,
64};
65
66static int dw_edma_pcie_probe(struct pci_dev *pdev,
67 const struct pci_device_id *pid)
68{
69 const struct dw_edma_pcie_data *pdata = (void *)pid->driver_data;
70 struct device *dev = &pdev->dev;
71 struct dw_edma_chip *chip;
72 int err, nr_irqs;
73 struct dw_edma *dw;
74
75
76 err = pcim_enable_device(pdev);
77 if (err) {
78 pci_err(pdev, "enabling device failed\n");
79 return err;
80 }
81
82
83 err = pcim_iomap_regions(pdev, BIT(pdata->rg_bar) |
84 BIT(pdata->ll_bar) |
85 BIT(pdata->dt_bar),
86 pci_name(pdev));
87 if (err) {
88 pci_err(pdev, "eDMA BAR I/O remapping failed\n");
89 return err;
90 }
91
92 pci_set_master(pdev);
93
94
95 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
96 if (!err) {
97 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
98 if (err) {
99 pci_err(pdev, "consistent DMA mask 64 set failed\n");
100 return err;
101 }
102 } else {
103 pci_err(pdev, "DMA mask 64 set failed\n");
104
105 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
106 if (err) {
107 pci_err(pdev, "DMA mask 32 set failed\n");
108 return err;
109 }
110
111 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
112 if (err) {
113 pci_err(pdev, "consistent DMA mask 32 set failed\n");
114 return err;
115 }
116 }
117
118
119 chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
120 if (!chip)
121 return -ENOMEM;
122
123 dw = devm_kzalloc(dev, sizeof(*dw), GFP_KERNEL);
124 if (!dw)
125 return -ENOMEM;
126
127
128 nr_irqs = pci_alloc_irq_vectors(pdev, 1, pdata->irqs,
129 PCI_IRQ_MSI | PCI_IRQ_MSIX);
130 if (nr_irqs < 1) {
131 pci_err(pdev, "fail to alloc IRQ vector (number of IRQs=%u)\n",
132 nr_irqs);
133 return -EPERM;
134 }
135
136
137 chip->dw = dw;
138 chip->dev = dev;
139 chip->id = pdev->devfn;
140 chip->irq = pdev->irq;
141
142 dw->rg_region.vaddr = pcim_iomap_table(pdev)[pdata->rg_bar];
143 dw->rg_region.vaddr += pdata->rg_off;
144 dw->rg_region.paddr = pdev->resource[pdata->rg_bar].start;
145 dw->rg_region.paddr += pdata->rg_off;
146 dw->rg_region.sz = pdata->rg_sz;
147
148 dw->ll_region.vaddr = pcim_iomap_table(pdev)[pdata->ll_bar];
149 dw->ll_region.vaddr += pdata->ll_off;
150 dw->ll_region.paddr = pdev->resource[pdata->ll_bar].start;
151 dw->ll_region.paddr += pdata->ll_off;
152 dw->ll_region.sz = pdata->ll_sz;
153
154 dw->dt_region.vaddr = pcim_iomap_table(pdev)[pdata->dt_bar];
155 dw->dt_region.vaddr += pdata->dt_off;
156 dw->dt_region.paddr = pdev->resource[pdata->dt_bar].start;
157 dw->dt_region.paddr += pdata->dt_off;
158 dw->dt_region.sz = pdata->dt_sz;
159
160 dw->version = pdata->version;
161 dw->mode = pdata->mode;
162 dw->nr_irqs = nr_irqs;
163 dw->ops = &dw_edma_pcie_core_ops;
164
165
166 pci_dbg(pdev, "Version:\t%u\n", dw->version);
167
168 pci_dbg(pdev, "Mode:\t%s\n",
169 dw->mode == EDMA_MODE_LEGACY ? "Legacy" : "Unroll");
170
171 pci_dbg(pdev, "Registers:\tBAR=%u, off=0x%.8lx, sz=0x%zx bytes, addr(v=%p, p=%pa)\n",
172 pdata->rg_bar, pdata->rg_off, pdata->rg_sz,
173 dw->rg_region.vaddr, &dw->rg_region.paddr);
174
175 pci_dbg(pdev, "L. List:\tBAR=%u, off=0x%.8lx, sz=0x%zx bytes, addr(v=%p, p=%pa)\n",
176 pdata->ll_bar, pdata->ll_off, pdata->ll_sz,
177 dw->ll_region.vaddr, &dw->ll_region.paddr);
178
179 pci_dbg(pdev, "Data:\tBAR=%u, off=0x%.8lx, sz=0x%zx bytes, addr(v=%p, p=%pa)\n",
180 pdata->dt_bar, pdata->dt_off, pdata->dt_sz,
181 dw->dt_region.vaddr, &dw->dt_region.paddr);
182
183 pci_dbg(pdev, "Nr. IRQs:\t%u\n", dw->nr_irqs);
184
185
186 if (!pci_dev_msi_enabled(pdev)) {
187 pci_err(pdev, "enable interrupt failed\n");
188 return -EPERM;
189 }
190
191 dw->irq = devm_kcalloc(dev, nr_irqs, sizeof(*dw->irq), GFP_KERNEL);
192 if (!dw->irq)
193 return -ENOMEM;
194
195
196 err = dw_edma_probe(chip);
197 if (err) {
198 pci_err(pdev, "eDMA probe failed\n");
199 return err;
200 }
201
202
203 pci_set_drvdata(pdev, chip);
204
205 return 0;
206}
207
208static void dw_edma_pcie_remove(struct pci_dev *pdev)
209{
210 struct dw_edma_chip *chip = pci_get_drvdata(pdev);
211 int err;
212
213
214 err = dw_edma_remove(chip);
215 if (err)
216 pci_warn(pdev, "can't remove device properly: %d\n", err);
217
218
219 pci_free_irq_vectors(pdev);
220}
221
222static const struct pci_device_id dw_edma_pcie_id_table[] = {
223 { PCI_DEVICE_DATA(SYNOPSYS, EDDA, &snps_edda_data) },
224 { }
225};
226MODULE_DEVICE_TABLE(pci, dw_edma_pcie_id_table);
227
228static struct pci_driver dw_edma_pcie_driver = {
229 .name = "dw-edma-pcie",
230 .id_table = dw_edma_pcie_id_table,
231 .probe = dw_edma_pcie_probe,
232 .remove = dw_edma_pcie_remove,
233};
234
235module_pci_driver(dw_edma_pcie_driver);
236
237MODULE_LICENSE("GPL v2");
238MODULE_DESCRIPTION("Synopsys DesignWare eDMA PCIe driver");
239MODULE_AUTHOR("Gustavo Pimentel <gustavo.pimentel@synopsys.com>");
240
