1 // SPDX-License-Identifier: GPL-2.0-only
3 * AMD Secure Processor device driver
5 * Copyright (C) 2013,2019 Advanced Micro Devices, Inc.
11 #include <linux/module.h>
12 #include <linux/kernel.h>
13 #include <linux/device.h>
14 #include <linux/pci.h>
15 #include <linux/pci_ids.h>
16 #include <linux/dma-mapping.h>
17 #include <linux/kthread.h>
18 #include <linux/sched.h>
19 #include <linux/interrupt.h>
20 #include <linux/spinlock.h>
21 #include <linux/delay.h>
22 #include <linux/ccp.h>
27 #define MSIX_VECTORS 2
31 struct msix_entry msix_entry[MSIX_VECTORS];
33 static struct sp_device *sp_dev_master;
35 static int sp_get_msix_irqs(struct sp_device *sp)
37 struct sp_pci *sp_pci = sp->dev_specific;
38 struct device *dev = sp->dev;
39 struct pci_dev *pdev = to_pci_dev(dev);
42 for (v = 0; v < ARRAY_SIZE(sp_pci->msix_entry); v++)
43 sp_pci->msix_entry[v].entry = v;
45 ret = pci_enable_msix_range(pdev, sp_pci->msix_entry, 1, v);
49 sp_pci->msix_count = ret;
50 sp->use_tasklet = true;
52 sp->psp_irq = sp_pci->msix_entry[0].vector;
53 sp->ccp_irq = (sp_pci->msix_count > 1) ? sp_pci->msix_entry[1].vector
54 : sp_pci->msix_entry[0].vector;
58 static int sp_get_msi_irq(struct sp_device *sp)
60 struct device *dev = sp->dev;
61 struct pci_dev *pdev = to_pci_dev(dev);
64 ret = pci_enable_msi(pdev);
68 sp->ccp_irq = pdev->irq;
69 sp->psp_irq = pdev->irq;
74 static int sp_get_irqs(struct sp_device *sp)
76 struct device *dev = sp->dev;
79 ret = sp_get_msix_irqs(sp);
83 /* Couldn't get MSI-X vectors, try MSI */
84 dev_notice(dev, "could not enable MSI-X (%d), trying MSI\n", ret);
85 ret = sp_get_msi_irq(sp);
89 /* Couldn't get MSI interrupt */
90 dev_notice(dev, "could not enable MSI (%d)\n", ret);
95 static void sp_free_irqs(struct sp_device *sp)
97 struct sp_pci *sp_pci = sp->dev_specific;
98 struct device *dev = sp->dev;
99 struct pci_dev *pdev = to_pci_dev(dev);
101 if (sp_pci->msix_count)
102 pci_disable_msix(pdev);
103 else if (sp->psp_irq)
104 pci_disable_msi(pdev);
110 static bool sp_pci_is_master(struct sp_device *sp)
112 struct device *dev_cur, *dev_new;
113 struct pci_dev *pdev_cur, *pdev_new;
116 dev_cur = sp_dev_master->dev;
118 pdev_new = to_pci_dev(dev_new);
119 pdev_cur = to_pci_dev(dev_cur);
121 if (pdev_new->bus->number < pdev_cur->bus->number)
124 if (PCI_SLOT(pdev_new->devfn) < PCI_SLOT(pdev_cur->devfn))
127 if (PCI_FUNC(pdev_new->devfn) < PCI_FUNC(pdev_cur->devfn))
133 static void psp_set_master(struct sp_device *sp)
135 if (!sp_dev_master) {
140 if (sp_pci_is_master(sp))
144 static struct sp_device *psp_get_master(void)
146 return sp_dev_master;
149 static void psp_clear_master(struct sp_device *sp)
151 if (sp == sp_dev_master) {
152 sp_dev_master = NULL;
153 dev_dbg(sp->dev, "Cleared sp_dev_master\n");
157 static int sp_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
159 struct sp_device *sp;
160 struct sp_pci *sp_pci;
161 struct device *dev = &pdev->dev;
162 void __iomem * const *iomap_table;
167 sp = sp_alloc_struct(dev);
171 sp_pci = devm_kzalloc(dev, sizeof(*sp_pci), GFP_KERNEL);
175 sp->dev_specific = sp_pci;
176 sp->dev_vdata = (struct sp_dev_vdata *)id->driver_data;
177 if (!sp->dev_vdata) {
179 dev_err(dev, "missing driver data\n");
183 ret = pcim_enable_device(pdev);
185 dev_err(dev, "pcim_enable_device failed (%d)\n", ret);
189 bar_mask = pci_select_bars(pdev, IORESOURCE_MEM);
190 ret = pcim_iomap_regions(pdev, bar_mask, "ccp");
192 dev_err(dev, "pcim_iomap_regions failed (%d)\n", ret);
196 iomap_table = pcim_iomap_table(pdev);
198 dev_err(dev, "pcim_iomap_table failed\n");
203 sp->io_map = iomap_table[sp->dev_vdata->bar];
205 dev_err(dev, "ioremap failed\n");
210 ret = sp_get_irqs(sp);
214 pci_set_master(pdev);
215 sp->set_psp_master_device = psp_set_master;
216 sp->get_psp_master_device = psp_get_master;
217 sp->clear_psp_master_device = psp_clear_master;
219 ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(48));
221 ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
223 dev_err(dev, "dma_set_mask_and_coherent failed (%d)\n",
229 dev_set_drvdata(dev, sp);
238 dev_notice(dev, "initialization failed\n");
242 static void sp_pci_remove(struct pci_dev *pdev)
244 struct device *dev = &pdev->dev;
245 struct sp_device *sp = dev_get_drvdata(dev);
255 static int __maybe_unused sp_pci_suspend(struct device *dev)
257 struct sp_device *sp = dev_get_drvdata(dev);
259 return sp_suspend(sp);
262 static int __maybe_unused sp_pci_resume(struct device *dev)
264 struct sp_device *sp = dev_get_drvdata(dev);
266 return sp_resume(sp);
269 #ifdef CONFIG_CRYPTO_DEV_SP_PSP
270 static const struct sev_vdata sevv1 = {
271 .cmdresp_reg = 0x10580,
272 .cmdbuff_addr_lo_reg = 0x105e0,
273 .cmdbuff_addr_hi_reg = 0x105e4,
276 static const struct sev_vdata sevv2 = {
277 .cmdresp_reg = 0x10980,
278 .cmdbuff_addr_lo_reg = 0x109e0,
279 .cmdbuff_addr_hi_reg = 0x109e4,
282 static const struct tee_vdata teev1 = {
283 .cmdresp_reg = 0x10544,
284 .cmdbuff_addr_lo_reg = 0x10548,
285 .cmdbuff_addr_hi_reg = 0x1054c,
286 .ring_wptr_reg = 0x10550,
287 .ring_rptr_reg = 0x10554,
290 static const struct psp_vdata pspv1 = {
292 .feature_reg = 0x105fc,
293 .inten_reg = 0x10610,
294 .intsts_reg = 0x10614,
297 static const struct psp_vdata pspv2 = {
299 .feature_reg = 0x109fc,
300 .inten_reg = 0x10690,
301 .intsts_reg = 0x10694,
304 static const struct psp_vdata pspv3 = {
306 .feature_reg = 0x109fc,
307 .inten_reg = 0x10690,
308 .intsts_reg = 0x10694,
312 static const struct sp_dev_vdata dev_vdata[] = {
315 #ifdef CONFIG_CRYPTO_DEV_SP_CCP
321 #ifdef CONFIG_CRYPTO_DEV_SP_CCP
322 .ccp_vdata = &ccpv5a,
324 #ifdef CONFIG_CRYPTO_DEV_SP_PSP
330 #ifdef CONFIG_CRYPTO_DEV_SP_CCP
331 .ccp_vdata = &ccpv5b,
336 #ifdef CONFIG_CRYPTO_DEV_SP_CCP
337 .ccp_vdata = &ccpv5a,
339 #ifdef CONFIG_CRYPTO_DEV_SP_PSP
345 #ifdef CONFIG_CRYPTO_DEV_SP_CCP
346 .ccp_vdata = &ccpv5a,
348 #ifdef CONFIG_CRYPTO_DEV_SP_PSP
353 static const struct pci_device_id sp_pci_table[] = {
354 { PCI_VDEVICE(AMD, 0x1537), (kernel_ulong_t)&dev_vdata[0] },
355 { PCI_VDEVICE(AMD, 0x1456), (kernel_ulong_t)&dev_vdata[1] },
356 { PCI_VDEVICE(AMD, 0x1468), (kernel_ulong_t)&dev_vdata[2] },
357 { PCI_VDEVICE(AMD, 0x1486), (kernel_ulong_t)&dev_vdata[3] },
358 { PCI_VDEVICE(AMD, 0x15DF), (kernel_ulong_t)&dev_vdata[4] },
359 /* Last entry must be zero */
362 MODULE_DEVICE_TABLE(pci, sp_pci_table);
364 static SIMPLE_DEV_PM_OPS(sp_pci_pm_ops, sp_pci_suspend, sp_pci_resume);
366 static struct pci_driver sp_pci_driver = {
368 .id_table = sp_pci_table,
369 .probe = sp_pci_probe,
370 .remove = sp_pci_remove,
371 .driver.pm = &sp_pci_pm_ops,
374 int sp_pci_init(void)
376 return pci_register_driver(&sp_pci_driver);
379 void sp_pci_exit(void)
381 pci_unregister_driver(&sp_pci_driver);