xref: /openbmc/linux/drivers/ntb/hw/intel/ntb_hw_gen4.h (revision 5d7c23d3)
1 /* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)          */
2 /* Copyright(c) 2020 Intel Corporation. All rights reserved.   */
3 #ifndef _NTB_INTEL_GEN4_H_
4 #define _NTB_INTEL_GEN4_H_
5 
6 #include "ntb_hw_intel.h"
7 
8 /* Supported PCI device revision range for ICX */
9 #define PCI_DEVICE_REVISION_ICX_MIN	0x2
10 #define PCI_DEVICE_REVISION_ICX_MAX	0xF
11 
12 /* Intel Gen4 NTB hardware */
13 /* PCIe config space */
14 #define GEN4_IMBAR23SZ_OFFSET		0x00c4
15 #define GEN4_IMBAR45SZ_OFFSET		0x00c5
16 #define GEN4_EMBAR23SZ_OFFSET		0x00c6
17 #define GEN4_EMBAR45SZ_OFFSET		0x00c7
18 #define GEN4_DEVCTRL_OFFSET		0x0048
19 #define GEN4_DEVSTS_OFFSET		0x004a
20 #define GEN4_UNCERRSTS_OFFSET		0x0104
21 #define GEN4_CORERRSTS_OFFSET		0x0110
22 
23 /* BAR0 MMIO */
24 #define GEN4_NTBCNTL_OFFSET		0x0000
25 #define GEN4_IM23XBASE_OFFSET		0x0010	/* IMBAR1XBASE */
26 #define GEN4_IM23XLMT_OFFSET		0x0018  /* IMBAR1XLMT */
27 #define GEN4_IM45XBASE_OFFSET		0x0020	/* IMBAR2XBASE */
28 #define GEN4_IM45XLMT_OFFSET		0x0028  /* IMBAR2XLMT */
29 #define GEN4_IM_INT_STATUS_OFFSET	0x0040
30 #define GEN4_IM_INT_DISABLE_OFFSET	0x0048
31 #define GEN4_INTVEC_OFFSET		0x0050  /* 0-32 vecs */
32 #define GEN4_IM23XBASEIDX_OFFSET	0x0074
33 #define GEN4_IM45XBASEIDX_OFFSET	0x0076
34 #define GEN4_IM_SPAD_OFFSET		0x0080  /* 0-15 SPADs */
35 #define GEN4_IM_SPAD_SEM_OFFSET		0x00c0	/* SPAD hw semaphore */
36 #define GEN4_IM_SPAD_STICKY_OFFSET	0x00c4  /* sticky SPAD */
37 #define GEN4_IM_DOORBELL_OFFSET		0x0100  /* 0-31 doorbells */
38 #define GEN4_LTR_SWSEL_OFFSET		0x30ec
39 #define GEN4_LTR_ACTIVE_OFFSET		0x30f0
40 #define GEN4_LTR_IDLE_OFFSET		0x30f4
41 #define GEN4_EM_SPAD_OFFSET		0x8080
42 /* note, link status is now in MMIO and not config space for NTB */
43 #define GEN4_LINK_CTRL_OFFSET		0xb050
44 #define GEN4_LINK_STATUS_OFFSET		0xb052
45 #define GEN4_PPD0_OFFSET		0xb0d4
46 #define GEN4_PPD1_OFFSET		0xb4c0
47 #define GEN4_LTSSMSTATEJMP		0xf040
48 
49 #define GEN4_PPD_CLEAR_TRN		0x0001
50 #define GEN4_PPD_LINKTRN		0x0008
51 #define GEN4_PPD_CONN_MASK		0x0300
52 #define SPR_PPD_CONN_MASK		0x0700
53 #define GEN4_PPD_CONN_B2B		0x0200
54 #define GEN4_PPD_DEV_MASK		0x1000
55 #define GEN4_PPD_DEV_DSD		0x1000
56 #define GEN4_PPD_DEV_USD		0x0000
57 #define SPR_PPD_DEV_MASK		0x4000
58 #define SPR_PPD_DEV_DSD 		0x4000
59 #define SPR_PPD_DEV_USD 		0x0000
60 #define GEN4_LINK_CTRL_LINK_DISABLE	0x0010
61 
62 #define GEN4_SLOTSTS			0xb05a
63 #define GEN4_SLOTSTS_DLLSCS		0x100
64 
65 #define GEN4_PPD_TOPO_MASK	(GEN4_PPD_CONN_MASK | GEN4_PPD_DEV_MASK)
66 #define GEN4_PPD_TOPO_B2B_USD	(GEN4_PPD_CONN_B2B | GEN4_PPD_DEV_USD)
67 #define GEN4_PPD_TOPO_B2B_DSD	(GEN4_PPD_CONN_B2B | GEN4_PPD_DEV_DSD)
68 
69 #define SPR_PPD_TOPO_MASK	(SPR_PPD_CONN_MASK | SPR_PPD_DEV_MASK)
70 #define SPR_PPD_TOPO_B2B_USD	(GEN4_PPD_CONN_B2B | SPR_PPD_DEV_USD)
71 #define SPR_PPD_TOPO_B2B_DSD	(GEN4_PPD_CONN_B2B | SPR_PPD_DEV_DSD)
72 
73 #define GEN4_DB_COUNT			32
74 #define GEN4_DB_LINK			32
75 #define GEN4_DB_LINK_BIT		BIT_ULL(GEN4_DB_LINK)
76 #define GEN4_DB_MSIX_VECTOR_COUNT	33
77 #define GEN4_DB_MSIX_VECTOR_SHIFT	1
78 #define GEN4_DB_TOTAL_SHIFT		33
79 #define GEN4_SPAD_COUNT			16
80 
81 #define NTB_CTL_E2I_BAR23_SNOOP		0x000004
82 #define NTB_CTL_E2I_BAR23_NOSNOOP	0x000008
83 #define NTB_CTL_I2E_BAR23_SNOOP		0x000010
84 #define NTB_CTL_I2E_BAR23_NOSNOOP	0x000020
85 #define NTB_CTL_E2I_BAR45_SNOOP		0x000040
86 #define NTB_CTL_E2I_BAR45_NOSNOO	0x000080
87 #define NTB_CTL_I2E_BAR45_SNOOP		0x000100
88 #define NTB_CTL_I2E_BAR45_NOSNOOP	0x000200
89 #define NTB_CTL_BUSNO_DIS_INC		0x000400
90 #define NTB_CTL_LINK_DOWN		0x010000
91 
92 #define NTB_SJC_FORCEDETECT		0x000004
93 
94 #define NTB_LTR_SWSEL_ACTIVE		0x0
95 #define NTB_LTR_SWSEL_IDLE		0x1
96 
97 #define NTB_LTR_NS_SHIFT		16
98 #define NTB_LTR_ACTIVE_VAL		0x0000  /* 0 us */
99 #define NTB_LTR_ACTIVE_LATSCALE		0x0800  /* 1us scale */
100 #define NTB_LTR_ACTIVE_REQMNT		0x8000  /* snoop req enable */
101 
102 #define NTB_LTR_IDLE_VAL		0x0258  /* 600 us */
103 #define NTB_LTR_IDLE_LATSCALE		0x0800  /* 1us scale */
104 #define NTB_LTR_IDLE_REQMNT		0x8000  /* snoop req enable */
105 
106 ssize_t ndev_ntb4_debugfs_read(struct file *filp, char __user *ubuf,
107 				      size_t count, loff_t *offp);
108 int gen4_init_dev(struct intel_ntb_dev *ndev);
109 ssize_t ndev_ntb4_debugfs_read(struct file *filp, char __user *ubuf,
110 				      size_t count, loff_t *offp);
111 
112 extern const struct ntb_dev_ops intel_ntb4_ops;
113 
pdev_is_ICX(struct pci_dev * pdev)114 static inline int pdev_is_ICX(struct pci_dev *pdev)
115 {
116 	if (pdev_is_gen4(pdev) &&
117 	    pdev->revision >= PCI_DEVICE_REVISION_ICX_MIN &&
118 	    pdev->revision <= PCI_DEVICE_REVISION_ICX_MAX)
119 		return 1;
120 	return 0;
121 }
122 
pdev_is_SPR(struct pci_dev * pdev)123 static inline int pdev_is_SPR(struct pci_dev *pdev)
124 {
125 	if (pdev_is_gen4(pdev) &&
126 	    pdev->revision > PCI_DEVICE_REVISION_ICX_MAX)
127 		return 1;
128 	return 0;
129 }
130 
131 #endif
132