1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
|
// SPDX-License-Identifier: MIT
/*
* Copyright © 2021-2022 Intel Corporation
* Copyright (C) 2021-2002 Red Hat
*/
#include "xe_ttm_sys_mgr.h"
#include <drm/drm_managed.h>
#include <drm/ttm/ttm_placement.h>
#include <drm/ttm/ttm_range_manager.h>
#include <drm/ttm/ttm_tt.h>
#include "xe_bo.h"
#include "xe_gt.h"
struct xe_ttm_sys_node {
struct ttm_buffer_object *tbo;
struct ttm_range_mgr_node base;
};
static inline struct xe_ttm_sys_node *
to_xe_ttm_sys_node(struct ttm_resource *res)
{
return container_of(res, struct xe_ttm_sys_node, base.base);
}
static int xe_ttm_sys_mgr_new(struct ttm_resource_manager *man,
struct ttm_buffer_object *tbo,
const struct ttm_place *place,
struct ttm_resource **res)
{
struct xe_ttm_sys_node *node;
int r;
node = kzalloc(struct_size(node, base.mm_nodes, 1), GFP_KERNEL);
if (!node)
return -ENOMEM;
node->tbo = tbo;
ttm_resource_init(tbo, place, &node->base.base);
if (!(place->flags & TTM_PL_FLAG_TEMPORARY) &&
ttm_resource_manager_usage(man) > (man->size << PAGE_SHIFT)) {
r = -ENOSPC;
goto err_fini;
}
node->base.mm_nodes[0].start = 0;
node->base.mm_nodes[0].size = PFN_UP(node->base.base.size);
node->base.base.start = XE_BO_INVALID_OFFSET;
*res = &node->base.base;
return 0;
err_fini:
ttm_resource_fini(man, &node->base.base);
kfree(node);
return r;
}
static void xe_ttm_sys_mgr_del(struct ttm_resource_manager *man,
struct ttm_resource *res)
{
struct xe_ttm_sys_node *node = to_xe_ttm_sys_node(res);
ttm_resource_fini(man, res);
kfree(node);
}
static void xe_ttm_sys_mgr_debug(struct ttm_resource_manager *man,
struct drm_printer *printer)
{
/*
* This function is called by debugfs entry and would require
* pm_runtime_{get,put} wrappers around any operation.
*/
}
static const struct ttm_resource_manager_func xe_ttm_sys_mgr_func = {
.alloc = xe_ttm_sys_mgr_new,
.free = xe_ttm_sys_mgr_del,
.debug = xe_ttm_sys_mgr_debug
};
static void ttm_sys_mgr_fini(struct drm_device *drm, void *arg)
{
struct xe_device *xe = (struct xe_device *)arg;
struct ttm_resource_manager *man = &xe->mem.sys_mgr;
int err;
ttm_resource_manager_set_used(man, false);
err = ttm_resource_manager_evict_all(&xe->ttm, man);
if (err)
return;
ttm_resource_manager_cleanup(man);
ttm_set_driver_manager(&xe->ttm, XE_PL_TT, NULL);
}
int xe_ttm_sys_mgr_init(struct xe_device *xe)
{
struct ttm_resource_manager *man = &xe->mem.sys_mgr;
struct sysinfo si;
u64 gtt_size;
si_meminfo(&si);
gtt_size = (u64)si.totalram * si.mem_unit;
/* TTM limits allocation of all TTM devices by 50% of system memory */
gtt_size /= 2;
man->use_tt = true;
man->func = &xe_ttm_sys_mgr_func;
ttm_resource_manager_init(man, &xe->ttm, gtt_size >> PAGE_SHIFT);
ttm_set_driver_manager(&xe->ttm, XE_PL_TT, man);
ttm_resource_manager_set_used(man, true);
/*
* On iGFX device with flat CCS, we clear CCS metadata, let's extend that
* and use GPU to clear pages as well.
*
* Disable this when init_on_free and/or init_on_alloc is on to avoid double
* zeroing pages with CPU and GPU.
*/
if (xe_device_has_flat_ccs(xe) && !IS_DGFX(xe) &&
!want_init_on_alloc(GFP_USER) && !want_init_on_free())
xe->mem.gpu_page_clear_sys = true;
return drmm_add_action_or_reset(&xe->drm, ttm_sys_mgr_fini, xe);
}
|
