mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-25 17:25:07 +07:00
9a19a6db37
Pull vfs updates from Al Viro: - more ->d_init() stuff (work.dcache) - pathname resolution cleanups (work.namei) - a few missing iov_iter primitives - copy_from_iter_full() and friends. Either copy the full requested amount, advance the iterator and return true, or fail, return false and do _not_ advance the iterator. Quite a few open-coded callers converted (and became more readable and harder to fuck up that way) (work.iov_iter) - several assorted patches, the big one being logfs removal * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: logfs: remove from tree vfs: fix put_compat_statfs64() does not handle errors namei: fold should_follow_link() with the step into not-followed link namei: pass both WALK_GET and WALK_MORE to should_follow_link() namei: invert WALK_PUT logics namei: shift interpretation of LOOKUP_FOLLOW inside should_follow_link() namei: saner calling conventions for mountpoint_last() namei.c: get rid of user_path_parent() switch getfrag callbacks to ..._full() primitives make skb_add_data,{_nocache}() and skb_copy_to_page_nocache() advance only on success [iov_iter] new primitives - copy_from_iter_full() and friends don't open-code file_inode() ceph: switch to use of ->d_init() ceph: unify dentry_operations instances lustre: switch to use of ->d_init()
360 lines
9.3 KiB
C
360 lines
9.3 KiB
C
/*
|
|
* Copyright 2008 Advanced Micro Devices, Inc.
|
|
* Copyright 2008 Red Hat Inc.
|
|
* Copyright 2009 Jerome Glisse.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
|
|
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
|
|
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
|
|
* OTHER DEALINGS IN THE SOFTWARE.
|
|
*
|
|
* Authors: Dave Airlie
|
|
* Alex Deucher
|
|
* Jerome Glisse
|
|
* Christian König
|
|
*/
|
|
#include <linux/seq_file.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/debugfs.h>
|
|
#include <drm/drmP.h>
|
|
#include <drm/amdgpu_drm.h>
|
|
#include "amdgpu.h"
|
|
#include "atom.h"
|
|
|
|
/*
|
|
* Rings
|
|
* Most engines on the GPU are fed via ring buffers. Ring
|
|
* buffers are areas of GPU accessible memory that the host
|
|
* writes commands into and the GPU reads commands out of.
|
|
* There is a rptr (read pointer) that determines where the
|
|
* GPU is currently reading, and a wptr (write pointer)
|
|
* which determines where the host has written. When the
|
|
* pointers are equal, the ring is idle. When the host
|
|
* writes commands to the ring buffer, it increments the
|
|
* wptr. The GPU then starts fetching commands and executes
|
|
* them until the pointers are equal again.
|
|
*/
|
|
static int amdgpu_debugfs_ring_init(struct amdgpu_device *adev,
|
|
struct amdgpu_ring *ring);
|
|
static void amdgpu_debugfs_ring_fini(struct amdgpu_ring *ring);
|
|
|
|
/**
|
|
* amdgpu_ring_alloc - allocate space on the ring buffer
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
* @ring: amdgpu_ring structure holding ring information
|
|
* @ndw: number of dwords to allocate in the ring buffer
|
|
*
|
|
* Allocate @ndw dwords in the ring buffer (all asics).
|
|
* Returns 0 on success, error on failure.
|
|
*/
|
|
int amdgpu_ring_alloc(struct amdgpu_ring *ring, unsigned ndw)
|
|
{
|
|
/* Align requested size with padding so unlock_commit can
|
|
* pad safely */
|
|
ndw = (ndw + ring->funcs->align_mask) & ~ring->funcs->align_mask;
|
|
|
|
/* Make sure we aren't trying to allocate more space
|
|
* than the maximum for one submission
|
|
*/
|
|
if (WARN_ON_ONCE(ndw > ring->max_dw))
|
|
return -ENOMEM;
|
|
|
|
ring->count_dw = ndw;
|
|
ring->wptr_old = ring->wptr;
|
|
|
|
if (ring->funcs->begin_use)
|
|
ring->funcs->begin_use(ring);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/** amdgpu_ring_insert_nop - insert NOP packets
|
|
*
|
|
* @ring: amdgpu_ring structure holding ring information
|
|
* @count: the number of NOP packets to insert
|
|
*
|
|
* This is the generic insert_nop function for rings except SDMA
|
|
*/
|
|
void amdgpu_ring_insert_nop(struct amdgpu_ring *ring, uint32_t count)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < count; i++)
|
|
amdgpu_ring_write(ring, ring->funcs->nop);
|
|
}
|
|
|
|
/** amdgpu_ring_generic_pad_ib - pad IB with NOP packets
|
|
*
|
|
* @ring: amdgpu_ring structure holding ring information
|
|
* @ib: IB to add NOP packets to
|
|
*
|
|
* This is the generic pad_ib function for rings except SDMA
|
|
*/
|
|
void amdgpu_ring_generic_pad_ib(struct amdgpu_ring *ring, struct amdgpu_ib *ib)
|
|
{
|
|
while (ib->length_dw & ring->funcs->align_mask)
|
|
ib->ptr[ib->length_dw++] = ring->funcs->nop;
|
|
}
|
|
|
|
/**
|
|
* amdgpu_ring_commit - tell the GPU to execute the new
|
|
* commands on the ring buffer
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
* @ring: amdgpu_ring structure holding ring information
|
|
*
|
|
* Update the wptr (write pointer) to tell the GPU to
|
|
* execute new commands on the ring buffer (all asics).
|
|
*/
|
|
void amdgpu_ring_commit(struct amdgpu_ring *ring)
|
|
{
|
|
uint32_t count;
|
|
|
|
/* We pad to match fetch size */
|
|
count = ring->funcs->align_mask + 1 -
|
|
(ring->wptr & ring->funcs->align_mask);
|
|
count %= ring->funcs->align_mask + 1;
|
|
ring->funcs->insert_nop(ring, count);
|
|
|
|
mb();
|
|
amdgpu_ring_set_wptr(ring);
|
|
|
|
if (ring->funcs->end_use)
|
|
ring->funcs->end_use(ring);
|
|
}
|
|
|
|
/**
|
|
* amdgpu_ring_undo - reset the wptr
|
|
*
|
|
* @ring: amdgpu_ring structure holding ring information
|
|
*
|
|
* Reset the driver's copy of the wptr (all asics).
|
|
*/
|
|
void amdgpu_ring_undo(struct amdgpu_ring *ring)
|
|
{
|
|
ring->wptr = ring->wptr_old;
|
|
|
|
if (ring->funcs->end_use)
|
|
ring->funcs->end_use(ring);
|
|
}
|
|
|
|
/**
|
|
* amdgpu_ring_init - init driver ring struct.
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
* @ring: amdgpu_ring structure holding ring information
|
|
* @max_ndw: maximum number of dw for ring alloc
|
|
* @nop: nop packet for this ring
|
|
*
|
|
* Initialize the driver information for the selected ring (all asics).
|
|
* Returns 0 on success, error on failure.
|
|
*/
|
|
int amdgpu_ring_init(struct amdgpu_device *adev, struct amdgpu_ring *ring,
|
|
unsigned max_dw, struct amdgpu_irq_src *irq_src,
|
|
unsigned irq_type)
|
|
{
|
|
int r;
|
|
|
|
if (ring->adev == NULL) {
|
|
if (adev->num_rings >= AMDGPU_MAX_RINGS)
|
|
return -EINVAL;
|
|
|
|
ring->adev = adev;
|
|
ring->idx = adev->num_rings++;
|
|
adev->rings[ring->idx] = ring;
|
|
r = amdgpu_fence_driver_init_ring(ring,
|
|
amdgpu_sched_hw_submission);
|
|
if (r)
|
|
return r;
|
|
}
|
|
|
|
r = amdgpu_wb_get(adev, &ring->rptr_offs);
|
|
if (r) {
|
|
dev_err(adev->dev, "(%d) ring rptr_offs wb alloc failed\n", r);
|
|
return r;
|
|
}
|
|
|
|
r = amdgpu_wb_get(adev, &ring->wptr_offs);
|
|
if (r) {
|
|
dev_err(adev->dev, "(%d) ring wptr_offs wb alloc failed\n", r);
|
|
return r;
|
|
}
|
|
|
|
r = amdgpu_wb_get(adev, &ring->fence_offs);
|
|
if (r) {
|
|
dev_err(adev->dev, "(%d) ring fence_offs wb alloc failed\n", r);
|
|
return r;
|
|
}
|
|
|
|
r = amdgpu_wb_get(adev, &ring->cond_exe_offs);
|
|
if (r) {
|
|
dev_err(adev->dev, "(%d) ring cond_exec_polling wb alloc failed\n", r);
|
|
return r;
|
|
}
|
|
ring->cond_exe_gpu_addr = adev->wb.gpu_addr + (ring->cond_exe_offs * 4);
|
|
ring->cond_exe_cpu_addr = &adev->wb.wb[ring->cond_exe_offs];
|
|
|
|
r = amdgpu_fence_driver_start_ring(ring, irq_src, irq_type);
|
|
if (r) {
|
|
dev_err(adev->dev, "failed initializing fences (%d).\n", r);
|
|
return r;
|
|
}
|
|
|
|
ring->ring_size = roundup_pow_of_two(max_dw * 4 *
|
|
amdgpu_sched_hw_submission);
|
|
|
|
/* Allocate ring buffer */
|
|
if (ring->ring_obj == NULL) {
|
|
r = amdgpu_bo_create_kernel(adev, ring->ring_size, PAGE_SIZE,
|
|
AMDGPU_GEM_DOMAIN_GTT,
|
|
&ring->ring_obj,
|
|
&ring->gpu_addr,
|
|
(void **)&ring->ring);
|
|
if (r) {
|
|
dev_err(adev->dev, "(%d) ring create failed\n", r);
|
|
return r;
|
|
}
|
|
memset((void *)ring->ring, 0, ring->ring_size);
|
|
}
|
|
ring->ptr_mask = (ring->ring_size / 4) - 1;
|
|
ring->max_dw = max_dw;
|
|
|
|
if (amdgpu_debugfs_ring_init(adev, ring)) {
|
|
DRM_ERROR("Failed to register debugfs file for rings !\n");
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* amdgpu_ring_fini - tear down the driver ring struct.
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
* @ring: amdgpu_ring structure holding ring information
|
|
*
|
|
* Tear down the driver information for the selected ring (all asics).
|
|
*/
|
|
void amdgpu_ring_fini(struct amdgpu_ring *ring)
|
|
{
|
|
ring->ready = false;
|
|
|
|
amdgpu_wb_free(ring->adev, ring->cond_exe_offs);
|
|
amdgpu_wb_free(ring->adev, ring->fence_offs);
|
|
amdgpu_wb_free(ring->adev, ring->rptr_offs);
|
|
amdgpu_wb_free(ring->adev, ring->wptr_offs);
|
|
|
|
amdgpu_bo_free_kernel(&ring->ring_obj,
|
|
&ring->gpu_addr,
|
|
(void **)&ring->ring);
|
|
|
|
amdgpu_debugfs_ring_fini(ring);
|
|
|
|
ring->adev->rings[ring->idx] = NULL;
|
|
}
|
|
|
|
/*
|
|
* Debugfs info
|
|
*/
|
|
#if defined(CONFIG_DEBUG_FS)
|
|
|
|
/* Layout of file is 12 bytes consisting of
|
|
* - rptr
|
|
* - wptr
|
|
* - driver's copy of wptr
|
|
*
|
|
* followed by n-words of ring data
|
|
*/
|
|
static ssize_t amdgpu_debugfs_ring_read(struct file *f, char __user *buf,
|
|
size_t size, loff_t *pos)
|
|
{
|
|
struct amdgpu_ring *ring = file_inode(f)->i_private;
|
|
int r, i;
|
|
uint32_t value, result, early[3];
|
|
|
|
if (*pos & 3 || size & 3)
|
|
return -EINVAL;
|
|
|
|
result = 0;
|
|
|
|
if (*pos < 12) {
|
|
early[0] = amdgpu_ring_get_rptr(ring);
|
|
early[1] = amdgpu_ring_get_wptr(ring);
|
|
early[2] = ring->wptr;
|
|
for (i = *pos / 4; i < 3 && size; i++) {
|
|
r = put_user(early[i], (uint32_t *)buf);
|
|
if (r)
|
|
return r;
|
|
buf += 4;
|
|
result += 4;
|
|
size -= 4;
|
|
*pos += 4;
|
|
}
|
|
}
|
|
|
|
while (size) {
|
|
if (*pos >= (ring->ring_size + 12))
|
|
return result;
|
|
|
|
value = ring->ring[(*pos - 12)/4];
|
|
r = put_user(value, (uint32_t*)buf);
|
|
if (r)
|
|
return r;
|
|
buf += 4;
|
|
result += 4;
|
|
size -= 4;
|
|
*pos += 4;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static const struct file_operations amdgpu_debugfs_ring_fops = {
|
|
.owner = THIS_MODULE,
|
|
.read = amdgpu_debugfs_ring_read,
|
|
.llseek = default_llseek
|
|
};
|
|
|
|
#endif
|
|
|
|
static int amdgpu_debugfs_ring_init(struct amdgpu_device *adev,
|
|
struct amdgpu_ring *ring)
|
|
{
|
|
#if defined(CONFIG_DEBUG_FS)
|
|
struct drm_minor *minor = adev->ddev->primary;
|
|
struct dentry *ent, *root = minor->debugfs_root;
|
|
char name[32];
|
|
|
|
sprintf(name, "amdgpu_ring_%s", ring->name);
|
|
|
|
ent = debugfs_create_file(name,
|
|
S_IFREG | S_IRUGO, root,
|
|
ring, &amdgpu_debugfs_ring_fops);
|
|
if (!ent)
|
|
return -ENOMEM;
|
|
|
|
i_size_write(ent->d_inode, ring->ring_size + 12);
|
|
ring->ent = ent;
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
static void amdgpu_debugfs_ring_fini(struct amdgpu_ring *ring)
|
|
{
|
|
#if defined(CONFIG_DEBUG_FS)
|
|
debugfs_remove(ring->ent);
|
|
#endif
|
|
}
|