1 // SPDX-License-Identifier: GPL-2.0-only
3 * AMD Secure Processor device driver
5 * Copyright (C) 2013,2019 Advanced Micro Devices, Inc.
7 * Author: Tom Lendacky <thomas.lendacky@amd.com>
8 * Author: Gary R Hook <gary.hook@amd.com>
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 int sp_pci_probe(struct pci_dev
*pdev
, const struct pci_device_id
*id
)
151 struct sp_device
*sp
;
152 struct sp_pci
*sp_pci
;
153 struct device
*dev
= &pdev
->dev
;
154 void __iomem
* const *iomap_table
;
159 sp
= sp_alloc_struct(dev
);
163 sp_pci
= devm_kzalloc(dev
, sizeof(*sp_pci
), GFP_KERNEL
);
167 sp
->dev_specific
= sp_pci
;
168 sp
->dev_vdata
= (struct sp_dev_vdata
*)id
->driver_data
;
169 if (!sp
->dev_vdata
) {
171 dev_err(dev
, "missing driver data\n");
175 ret
= pcim_enable_device(pdev
);
177 dev_err(dev
, "pcim_enable_device failed (%d)\n", ret
);
181 bar_mask
= pci_select_bars(pdev
, IORESOURCE_MEM
);
182 ret
= pcim_iomap_regions(pdev
, bar_mask
, "ccp");
184 dev_err(dev
, "pcim_iomap_regions failed (%d)\n", ret
);
188 iomap_table
= pcim_iomap_table(pdev
);
190 dev_err(dev
, "pcim_iomap_table failed\n");
195 sp
->io_map
= iomap_table
[sp
->dev_vdata
->bar
];
197 dev_err(dev
, "ioremap failed\n");
202 ret
= sp_get_irqs(sp
);
206 pci_set_master(pdev
);
207 sp
->set_psp_master_device
= psp_set_master
;
208 sp
->get_psp_master_device
= psp_get_master
;
210 ret
= dma_set_mask_and_coherent(dev
, DMA_BIT_MASK(48));
212 ret
= dma_set_mask_and_coherent(dev
, DMA_BIT_MASK(32));
214 dev_err(dev
, "dma_set_mask_and_coherent failed (%d)\n",
220 dev_set_drvdata(dev
, sp
);
229 dev_notice(dev
, "initialization failed\n");
233 static void sp_pci_remove(struct pci_dev
*pdev
)
235 struct device
*dev
= &pdev
->dev
;
236 struct sp_device
*sp
= dev_get_drvdata(dev
);
247 static int sp_pci_suspend(struct pci_dev
*pdev
, pm_message_t state
)
249 struct device
*dev
= &pdev
->dev
;
250 struct sp_device
*sp
= dev_get_drvdata(dev
);
252 return sp_suspend(sp
, state
);
255 static int sp_pci_resume(struct pci_dev
*pdev
)
257 struct device
*dev
= &pdev
->dev
;
258 struct sp_device
*sp
= dev_get_drvdata(dev
);
260 return sp_resume(sp
);
264 #ifdef CONFIG_CRYPTO_DEV_SP_PSP
265 static const struct sev_vdata sevv1
= {
266 .cmdresp_reg
= 0x10580,
267 .cmdbuff_addr_lo_reg
= 0x105e0,
268 .cmdbuff_addr_hi_reg
= 0x105e4,
271 static const struct sev_vdata sevv2
= {
272 .cmdresp_reg
= 0x10980,
273 .cmdbuff_addr_lo_reg
= 0x109e0,
274 .cmdbuff_addr_hi_reg
= 0x109e4,
277 static const struct tee_vdata teev1
= {
278 .cmdresp_reg
= 0x10544,
279 .cmdbuff_addr_lo_reg
= 0x10548,
280 .cmdbuff_addr_hi_reg
= 0x1054c,
281 .ring_wptr_reg
= 0x10550,
282 .ring_rptr_reg
= 0x10554,
285 static const struct psp_vdata pspv1
= {
287 .feature_reg
= 0x105fc,
288 .inten_reg
= 0x10610,
289 .intsts_reg
= 0x10614,
292 static const struct psp_vdata pspv2
= {
294 .feature_reg
= 0x109fc,
295 .inten_reg
= 0x10690,
296 .intsts_reg
= 0x10694,
299 static const struct psp_vdata pspv3
= {
301 .feature_reg
= 0x109fc,
302 .inten_reg
= 0x10690,
303 .intsts_reg
= 0x10694,
307 static const struct sp_dev_vdata dev_vdata
[] = {
310 #ifdef CONFIG_CRYPTO_DEV_SP_CCP
316 #ifdef CONFIG_CRYPTO_DEV_SP_CCP
317 .ccp_vdata
= &ccpv5a
,
319 #ifdef CONFIG_CRYPTO_DEV_SP_PSP
325 #ifdef CONFIG_CRYPTO_DEV_SP_CCP
326 .ccp_vdata
= &ccpv5b
,
331 #ifdef CONFIG_CRYPTO_DEV_SP_CCP
332 .ccp_vdata
= &ccpv5a
,
334 #ifdef CONFIG_CRYPTO_DEV_SP_PSP
340 #ifdef CONFIG_CRYPTO_DEV_SP_CCP
341 .ccp_vdata
= &ccpv5a
,
343 #ifdef CONFIG_CRYPTO_DEV_SP_PSP
348 static const struct pci_device_id sp_pci_table
[] = {
349 { PCI_VDEVICE(AMD
, 0x1537), (kernel_ulong_t
)&dev_vdata
[0] },
350 { PCI_VDEVICE(AMD
, 0x1456), (kernel_ulong_t
)&dev_vdata
[1] },
351 { PCI_VDEVICE(AMD
, 0x1468), (kernel_ulong_t
)&dev_vdata
[2] },
352 { PCI_VDEVICE(AMD
, 0x1486), (kernel_ulong_t
)&dev_vdata
[3] },
353 { PCI_VDEVICE(AMD
, 0x15DF), (kernel_ulong_t
)&dev_vdata
[4] },
354 /* Last entry must be zero */
357 MODULE_DEVICE_TABLE(pci
, sp_pci_table
);
359 static struct pci_driver sp_pci_driver
= {
361 .id_table
= sp_pci_table
,
362 .probe
= sp_pci_probe
,
363 .remove
= sp_pci_remove
,
365 .suspend
= sp_pci_suspend
,
366 .resume
= sp_pci_resume
,
370 int sp_pci_init(void)
372 return pci_register_driver(&sp_pci_driver
);
375 void sp_pci_exit(void)
377 pci_unregister_driver(&sp_pci_driver
);