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      1 /* $NetBSD: amdccp_pci.c,v 1.4 2022/12/18 15:50:32 reinoud Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2020 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jason R. Thorpe.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: amdccp_pci.c,v 1.4 2022/12/18 15:50:32 reinoud Exp $");
     34 
     35 #include <sys/param.h>
     36 #include <sys/bus.h>
     37 #include <sys/cpu.h>
     38 #include <sys/device.h>
     39 
     40 #include <dev/pci/pcireg.h>
     41 #include <dev/pci/pcivar.h>
     42 #include <dev/pci/pcidevs.h>
     43 
     44 #include <dev/ic/amdccpvar.h>
     45 
     46 static int	amdccp_pci_match(device_t, cfdata_t, void *);
     47 static void	amdccp_pci_attach(device_t, device_t, void *);
     48 
     49 CFATTACH_DECL_NEW(amdccp_pci, sizeof(struct amdccp_softc),
     50     amdccp_pci_match, amdccp_pci_attach, NULL, NULL);
     51 
     52 #define	AMDCCP_MEM_BAR		PCI_BAR2
     53 
     54 static const struct amdccp_pci_product {
     55 	pci_vendor_id_t		vendor;
     56 	pci_product_id_t	product;
     57 } amdccp_pci_products[] = {
     58 	{ .vendor	=	PCI_VENDOR_AMD,
     59 	  .product	=	PCI_PRODUCT_AMD_F16_CCP,
     60 	},
     61 	{ .vendor	=	PCI_VENDOR_AMD,
     62 	  .product	=	PCI_PRODUCT_AMD_F17_CCP_1,
     63 	},
     64 	{ .vendor	=	PCI_VENDOR_AMD,
     65 	  .product	=	PCI_PRODUCT_AMD_F17_CCP_2,
     66 	},
     67 	{ .vendor	=	PCI_VENDOR_AMD,
     68 	  .product	=	PCI_PRODUCT_AMD_F17_1X_PSP,
     69 	},
     70 	{ .vendor	=	PCI_VENDOR_AMD,
     71 	  .product	=	PCI_PRODUCT_AMD_F17_7X_CCP,
     72 	},
     73 	{ .vendor	=	PCI_VENDOR_AMD,
     74 	  .product	=	PCI_PRODUCT_AMD_F17_9X_CCP,
     75 	},
     76 };
     77 
     78 static const struct amdccp_pci_product *
     79 amdccp_pci_lookup(const struct pci_attach_args * const pa)
     80 {
     81 	unsigned int i;
     82 
     83 	for (i = 0; i < __arraycount(amdccp_pci_products); i++) {
     84 		if (PCI_VENDOR(pa->pa_id)  == amdccp_pci_products[i].vendor &&
     85 		    PCI_PRODUCT(pa->pa_id) == amdccp_pci_products[i].product) {
     86 			return &amdccp_pci_products[i];
     87 		}
     88 	}
     89 	return NULL;
     90 }
     91 
     92 static int
     93 amdccp_pci_match(device_t parent, cfdata_t cf, void *aux)
     94 {
     95 	const struct pci_attach_args * const pa = aux;
     96 
     97 	return amdccp_pci_lookup(pa) != NULL;
     98 }
     99 
    100 static void
    101 amdccp_pci_attach(device_t parent, device_t self, void *aux)
    102 {
    103 	struct amdccp_softc * const sc = device_private(self);
    104 	const struct pci_attach_args * const pa = aux;
    105 	pcireg_t type;
    106 
    107 	sc->sc_dev = self;
    108 
    109 	aprint_naive("\n");
    110 	aprint_normal(": AMD Cryptographic Coprocessor\n");
    111 
    112 	type = pci_mapreg_type(pa->pa_pc, pa->pa_tag, AMDCCP_MEM_BAR);
    113 	if (PCI_MAPREG_TYPE(type) != PCI_MAPREG_TYPE_MEM) {
    114 		aprint_error_dev(self, "expected MEM register, got IO\n");
    115 		return;
    116 	}
    117 
    118 	if (pci_mapreg_map(pa, AMDCCP_MEM_BAR, type, 0,
    119 			   &sc->sc_bst, &sc->sc_bsh, NULL, NULL) != 0) {
    120 		aprint_error_dev(self, "unable to map device registers\n");
    121 		return;
    122 	}
    123 
    124 	amdccp_common_attach(sc);
    125 	pmf_device_register(self, NULL, NULL);
    126 }
    127