1// SPDX-License-Identifier: GPL-2.0
2
3/*
4 * Copyright 2022 HabanaLabs, Ltd.
5 * All Rights Reserved.
6 */
7
8#include "habanalabs.h"
9
10#define VCMD_CONTROL_OFFSET 0x40 /* SWREG16 */
11#define VCMD_IRQ_STATUS_OFFSET 0x44 /* SWREG17 */
12
13#define VCMD_IRQ_STATUS_ENDCMD_MASK 0x1
14#define VCMD_IRQ_STATUS_BUSERR_MASK 0x2
15#define VCMD_IRQ_STATUS_TIMEOUT_MASK 0x4
16#define VCMD_IRQ_STATUS_CMDERR_MASK 0x8
17#define VCMD_IRQ_STATUS_ABORT_MASK 0x10
18#define VCMD_IRQ_STATUS_RESET_MASK 0x20
19
20static void dec_print_abnrm_intr_source(struct hl_device *hdev, u32 irq_status)
21{
22 const char *format = "abnormal interrupt source:%s%s%s%s%s%s\n";
23 char *intr_source[6] = {"Unknown", "", "", "", "", ""};
24 int i = 0;
25
26 if (!irq_status)
27 return;
28
29 if (irq_status & VCMD_IRQ_STATUS_ENDCMD_MASK)
30 intr_source[i++] = " ENDCMD";
31 if (irq_status & VCMD_IRQ_STATUS_BUSERR_MASK)
32 intr_source[i++] = " BUSERR";
33 if (irq_status & VCMD_IRQ_STATUS_TIMEOUT_MASK)
34 intr_source[i++] = " TIMEOUT";
35 if (irq_status & VCMD_IRQ_STATUS_CMDERR_MASK)
36 intr_source[i++] = " CMDERR";
37 if (irq_status & VCMD_IRQ_STATUS_ABORT_MASK)
38 intr_source[i++] = " ABORT";
39 if (irq_status & VCMD_IRQ_STATUS_RESET_MASK)
40 intr_source[i++] = " RESET";
41
42 dev_err(hdev->dev, format, intr_source[0], intr_source[1],
43 intr_source[2], intr_source[3], intr_source[4], intr_source[5]);
44}
45
46static void dec_abnrm_intr_work(struct work_struct *work)
47{
48 struct hl_dec *dec = container_of(work, struct hl_dec, abnrm_intr_work);
49 struct hl_device *hdev = dec->hdev;
50 u32 irq_status, event_mask = 0;
51 bool reset_required = false;
52
53 irq_status = RREG32(dec->base_addr + VCMD_IRQ_STATUS_OFFSET);
54
55 dev_err(hdev->dev, "Decoder abnormal interrupt %#x, core %d\n", irq_status, dec->core_id);
56
57 dec_print_abnrm_intr_source(hdev, irq_status);
58
59 /* Clear the interrupt */
60 WREG32(dec->base_addr + VCMD_IRQ_STATUS_OFFSET, irq_status);
61
62 /* Flush the interrupt clear */
63 RREG32(dec->base_addr + VCMD_IRQ_STATUS_OFFSET);
64
65 if (irq_status & VCMD_IRQ_STATUS_TIMEOUT_MASK) {
66 reset_required = true;
67 event_mask |= HL_NOTIFIER_EVENT_GENERAL_HW_ERR;
68 }
69
70 if (irq_status & VCMD_IRQ_STATUS_CMDERR_MASK)
71 event_mask |= HL_NOTIFIER_EVENT_UNDEFINED_OPCODE;
72
73 if (irq_status & (VCMD_IRQ_STATUS_ENDCMD_MASK |
74 VCMD_IRQ_STATUS_BUSERR_MASK |
75 VCMD_IRQ_STATUS_ABORT_MASK))
76 event_mask |= HL_NOTIFIER_EVENT_USER_ENGINE_ERR;
77
78 if (reset_required) {
79 event_mask |= HL_NOTIFIER_EVENT_DEVICE_RESET;
80 hl_device_cond_reset(hdev, flags: 0, event_mask);
81 } else if (event_mask) {
82 hl_notifier_event_send_all(hdev, event_mask);
83 }
84}
85
86void hl_dec_fini(struct hl_device *hdev)
87{
88 kfree(objp: hdev->dec);
89}
90
91int hl_dec_init(struct hl_device *hdev)
92{
93 struct asic_fixed_properties *prop = &hdev->asic_prop;
94 struct hl_dec *dec;
95 int rc, j;
96
97 /* if max core is 0, nothing to do*/
98 if (!prop->max_dec)
99 return 0;
100
101 hdev->dec = kcalloc(prop->max_dec, sizeof(struct hl_dec), GFP_KERNEL);
102 if (!hdev->dec)
103 return -ENOMEM;
104
105 for (j = 0 ; j < prop->max_dec ; j++) {
106 dec = hdev->dec + j;
107
108 dec->hdev = hdev;
109 INIT_WORK(&dec->abnrm_intr_work, dec_abnrm_intr_work);
110 dec->core_id = j;
111 dec->base_addr = hdev->asic_funcs->get_dec_base_addr(hdev, j);
112 if (!dec->base_addr) {
113 dev_err(hdev->dev, "Invalid base address of decoder %d\n", j);
114 rc = -EINVAL;
115 goto err_dec_fini;
116 }
117 }
118
119 return 0;
120
121err_dec_fini:
122 hl_dec_fini(hdev);
123
124 return rc;
125}
126
127void hl_dec_ctx_fini(struct hl_ctx *ctx)
128{
129 struct hl_device *hdev = ctx->hdev;
130 struct asic_fixed_properties *prop = &hdev->asic_prop;
131 struct hl_dec *dec;
132 int j;
133
134 for (j = 0 ; j < prop->max_dec ; j++) {
135 if (!!(prop->decoder_enabled_mask & BIT(j))) {
136 dec = hdev->dec + j;
137 /* Stop the decoder */
138 WREG32(dec->base_addr + VCMD_CONTROL_OFFSET, 0);
139 }
140 }
141}
142

source code of linux/drivers/accel/habanalabs/common/decoder.c