1 /* SPDX-License-Identifier: BSD-3-Clause */
2 /* Copyright(c) 2007-2022 Intel Corporation */
3 #include "adf_c4xxx_hw_data.h"
4 #include <linux/kernel.h>
5 #include <linux/types.h>
6 #include <linux/fs.h>
7 #include <linux/errno.h>
8 #include <linux/device.h>
9 #include <linux/io.h>
10 #include <sys/sbuf.h>
11 #include <sys/sysctl.h>
12 #include <adf_accel_devices.h>
13 #include <adf_common_drv.h>
14 #include <adf_cfg.h>
15 
16 /* String buffer size */
17 #define AE_INFO_BUFFER_SIZE 50
18 
19 #define AE_CONFIG_DBG_FILE "ae_config"
20 
21 static u8
22 find_first_me_index(const u32 au_mask)
23 {
24 	u8 i;
25 	u32 mask = au_mask;
26 
27 	/* Retrieve the index of the first ME of an accel unit */
28 	for (i = 0; i < ADF_C4XXX_MAX_ACCELENGINES; i++) {
29 		if (mask & BIT(i))
30 			return i;
31 	}
32 
33 	return 0;
34 }
35 
36 static u8
37 get_au_index(u8 au_mask)
38 {
39 	u8 au_index = 0;
40 
41 	while (au_mask) {
42 		if (au_mask == BIT(0))
43 			return au_index;
44 		au_index++;
45 		au_mask = au_mask >> 1;
46 	}
47 
48 	return 0;
49 }
50 
51 static int adf_ae_config_show(SYSCTL_HANDLER_ARGS)
52 {
53 	struct sbuf sb;
54 	struct adf_accel_dev *accel_dev = arg1;
55 	struct adf_hw_device_data *hw_data = accel_dev->hw_device;
56 	struct adf_accel_unit *accel_unit = accel_dev->au_info->au;
57 	u8 i, j;
58 	u8 au_index;
59 	u8 ae_index;
60 	u8 num_aes;
61 	int ret = 0;
62 	u32 num_au = hw_data->get_num_accel_units(hw_data);
63 
64 	sbuf_new_for_sysctl(&sb, NULL, 2048, req);
65 
66 	sbuf_printf(&sb, "\n");
67 	for (i = 0; i < num_au; i++) {
68 		/* Retrieve accel unit index */
69 		au_index = get_au_index(accel_unit[i].au_mask);
70 
71 		/* Retrieve index of fist ME in current accel unit */
72 		ae_index = find_first_me_index(accel_unit[i].ae_mask);
73 		num_aes = accel_unit[i].num_ae;
74 
75 		/* Retrieve accel unit type */
76 		switch (accel_unit[i].services) {
77 		case ADF_ACCEL_CRYPTO:
78 			sbuf_printf(&sb,
79 				    "\tAccel unit %d - CRYPTO\n",
80 				    au_index);
81 			/* Display ME assignment for a particular accel unit */
82 			for (j = ae_index; j < (num_aes + ae_index); j++)
83 				sbuf_printf(&sb, "\t\tAE[%d]: crypto\n", j);
84 			break;
85 		case ADF_ACCEL_COMPRESSION:
86 			sbuf_printf(&sb,
87 				    "\tAccel unit %d - COMPRESSION\n",
88 				    au_index);
89 			/* Display ME assignment for a particular accel unit */
90 			for (j = ae_index; j < (num_aes + ae_index); j++)
91 				sbuf_printf(&sb,
92 					    "\t\tAE[%d]: compression\n",
93 					    j);
94 			break;
95 		case ADF_ACCEL_SERVICE_NULL:
96 		default:
97 			break;
98 		}
99 	}
100 
101 	sbuf_finish(&sb);
102 	ret = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb));
103 	sbuf_delete(&sb);
104 
105 	return ret;
106 }
107 
108 static int
109 c4xxx_add_debugfs_ae_config(struct adf_accel_dev *accel_dev)
110 {
111 	struct sysctl_ctx_list *qat_sysctl_ctx = NULL;
112 	struct sysctl_oid *qat_sysctl_tree = NULL;
113 	struct sysctl_oid *ae_conf_ctl = NULL;
114 
115 	qat_sysctl_ctx =
116 	    device_get_sysctl_ctx(accel_dev->accel_pci_dev.pci_dev);
117 	qat_sysctl_tree =
118 	    device_get_sysctl_tree(accel_dev->accel_pci_dev.pci_dev);
119 
120 	ae_conf_ctl = SYSCTL_ADD_PROC(qat_sysctl_ctx,
121 				      SYSCTL_CHILDREN(qat_sysctl_tree),
122 				      OID_AUTO,
123 				      AE_CONFIG_DBG_FILE,
124 				      CTLTYPE_STRING | CTLFLAG_RD,
125 				      accel_dev,
126 				      0,
127 				      adf_ae_config_show,
128 				      "A",
129 				      "AE config");
130 	accel_dev->debugfs_ae_config = ae_conf_ctl;
131 	if (!accel_dev->debugfs_ae_config) {
132 		device_printf(GET_DEV(accel_dev),
133 			      "Could not create debug ae config entry.\n");
134 		return EFAULT;
135 	}
136 	return 0;
137 }
138 
139 int
140 c4xxx_init_ae_config(struct adf_accel_dev *accel_dev)
141 {
142 	int ret = 0;
143 
144 	/* Add a new file in debug file system with h/w version. */
145 	ret = c4xxx_add_debugfs_ae_config(accel_dev);
146 	if (ret) {
147 		c4xxx_exit_ae_config(accel_dev);
148 		device_printf(GET_DEV(accel_dev),
149 			      "Could not create debugfs ae config file\n");
150 		return EINVAL;
151 	}
152 
153 	return 0;
154 }
155 
156 void
157 c4xxx_exit_ae_config(struct adf_accel_dev *accel_dev)
158 {
159 	if (!accel_dev->debugfs_ae_config)
160 		return;
161 
162 	/* Delete ae configuration file */
163 	remove_oid(accel_dev, accel_dev->debugfs_ae_config);
164 
165 	accel_dev->debugfs_ae_config = NULL;
166 }
167