// SPDX-License-Identifier: GPL-2.0 OR MIT
/*
* Copyright 2014 - 2022 Advanced Micro Devices , Inc .
*
* 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 .
*
*/
#include <linux/slab.h>
#include <linux/mutex.h>
#include "kfd_device_queue_manager.h"
#include "kfd_kernel_queue.h"
#include "kfd_priv.h"
#define OVER_SUBSCRIPTION_PROCESS_COUNT (1 << 0 )
#define OVER_SUBSCRIPTION_COMPUTE_QUEUE_COUNT (1 << 1 )
#define OVER_SUBSCRIPTION_GWS_QUEUE_COUNT (1 << 2 )
#define OVER_SUBSCRIPTION_XNACK_CONFLICT (1 << 3 )
static inline void inc_wptr(unsigned int *wptr, unsigned int increment_bytes,
unsigned int buffer_size_bytes)
{
unsigned int temp = *wptr + increment_bytes / sizeof (uint32_t);
WARN((temp * sizeof (uint32_t)) > buffer_size_bytes,
"Runlist IB overflow" );
*wptr = temp;
}
static void pm_calc_rlib_size(struct packet_manager *pm,
unsigned int *rlib_size,
int *over_subscription,
int xnack_conflict)
{
unsigned int process_count, queue_count, compute_queue_count, gws_queue_count;
unsigned int map_queue_size;
unsigned int max_proc_per_quantum = 1 ;
struct kfd_node *node = pm->dqm->dev;
struct device *dev = node->adev->dev;
process_count = pm->dqm->processes_count;
queue_count = pm->dqm->active_queue_count;
compute_queue_count = pm->dqm->active_cp_queue_count;
gws_queue_count = pm->dqm->gws_queue_count;
/* check if there is over subscription
* Note : the arbitration between the number of VMIDs and
* hws_max_conc_proc has been done in
* kgd2kfd_device_init ( ) .
*/
*over_subscription = 0 ;
if (node->max_proc_per_quantum > 1 )
max_proc_per_quantum = node->max_proc_per_quantum;
if (process_count > max_proc_per_quantum)
*over_subscription |= OVER_SUBSCRIPTION_PROCESS_COUNT;
if (compute_queue_count > get_cp_queues_num(pm->dqm))
*over_subscription |= OVER_SUBSCRIPTION_COMPUTE_QUEUE_COUNT;
if (gws_queue_count > 1 )
*over_subscription |= OVER_SUBSCRIPTION_GWS_QUEUE_COUNT;
if (xnack_conflict && (node->adev->gmc.xnack_flags & AMDGPU_GMC_XNACK_FLAG_CHAIN))
*over_subscription |= OVER_SUBSCRIPTION_XNACK_CONFLICT;
if (*over_subscription)
dev_dbg(dev, "Over subscribed runlist\n" );
map_queue_size = pm->pmf->map_queues_size;
/* calculate run list ib allocation size */
*rlib_size = process_count * pm->pmf->map_process_size +
queue_count * map_queue_size;
/*
* Increase the allocation size in case we need a chained run list
* when over subscription
*/
if (*over_subscription)
*rlib_size += pm->pmf->runlist_size;
dev_dbg(dev, "runlist ib size %d\n" , *rlib_size);
}
static int pm_allocate_runlist_ib(struct packet_manager *pm,
unsigned int **rl_buffer,
uint64_t *rl_gpu_buffer,
unsigned int *rl_buffer_size,
int *is_over_subscription,
int xnack_conflict)
{
struct kfd_node *node = pm->dqm->dev;
struct device *dev = node->adev->dev;
int retval;
if (WARN_ON(pm->allocated))
return -EINVAL;
pm_calc_rlib_size(pm, rl_buffer_size, is_over_subscription,
xnack_conflict);
mutex_lock(&pm->lock);
retval = kfd_gtt_sa_allocate(node, *rl_buffer_size, &pm->ib_buffer_obj);
if (retval) {
dev_err(dev, "Failed to allocate runlist IB\n" );
goto out;
}
*(void **)rl_buffer = pm->ib_buffer_obj->cpu_ptr;
*rl_gpu_buffer = pm->ib_buffer_obj->gpu_addr;
memset(*rl_buffer, 0 , *rl_buffer_size);
pm->allocated = true ;
out:
mutex_unlock(&pm->lock);
return retval;
}
static int pm_create_runlist_ib(struct packet_manager *pm,
struct list_head *queues,
uint64_t *rl_gpu_addr,
size_t *rl_size_bytes)
{
unsigned int alloc_size_bytes;
unsigned int *rl_buffer, rl_wptr, i;
struct kfd_node *node = pm->dqm->dev;
struct device *dev = node->adev->dev;
int retval, processes_mapped;
struct device_process_node *cur;
struct qcm_process_device *qpd;
struct queue *q;
struct kernel_queue *kq;
int is_over_subscription;
int xnack_enabled = -1 ;
bool xnack_conflict = 0 ;
rl_wptr = retval = processes_mapped = 0 ;
/* Check if processes set different xnack modes */
list_for_each_entry(cur, queues, list) {
qpd = cur->qpd;
if (xnack_enabled < 0 )
/* First process */
xnack_enabled = qpd->pqm->process->xnack_enabled;
else if (qpd->pqm->process->xnack_enabled != xnack_enabled) {
/* Found a process with a different xnack mode */
xnack_conflict = 1 ;
break ;
}
}
retval = pm_allocate_runlist_ib(pm, &rl_buffer, rl_gpu_addr,
&alloc_size_bytes, &is_over_subscription,
xnack_conflict);
if (retval)
return retval;
*rl_size_bytes = alloc_size_bytes;
pm->ib_size_bytes = alloc_size_bytes;
dev_dbg(dev, "Building runlist ib process count: %d queues count %d\n" ,
pm->dqm->processes_count, pm->dqm->active_queue_count);
build_runlist_ib:
/* build the run list ib packet */
list_for_each_entry(cur, queues, list) {
qpd = cur->qpd;
/* group processes with the same xnack mode together */
if (qpd->pqm->process->xnack_enabled != xnack_enabled)
continue ;
/* build map process packet */
if (processes_mapped >= pm->dqm->processes_count) {
dev_dbg(dev, "Not enough space left in runlist IB\n" );
pm_release_ib(pm);
return -ENOMEM;
}
retval = pm->pmf->map_process(pm, &rl_buffer[rl_wptr], qpd);
if (retval)
return retval;
processes_mapped++;
inc_wptr(&rl_wptr, pm->pmf->map_process_size,
alloc_size_bytes);
list_for_each_entry(kq, &qpd->priv_queue_list, list) {
if (!kq->queue->properties.is_active)
continue ;
dev_dbg(dev,
"static_queue, mapping kernel q %d, is debug status %d\n" ,
kq->queue->queue, qpd->is_debug);
retval = pm->pmf->map_queues(pm,
&rl_buffer[rl_wptr],
kq->queue,
qpd->is_debug);
if (retval)
return retval;
inc_wptr(&rl_wptr,
pm->pmf->map_queues_size,
alloc_size_bytes);
}
list_for_each_entry(q, &qpd->queues_list, list) {
if (!q->properties.is_active)
continue ;
dev_dbg(dev,
"static_queue, mapping user queue %d, is debug status %d\n" ,
q->queue, qpd->is_debug);
retval = pm->pmf->map_queues(pm,
&rl_buffer[rl_wptr],
q,
qpd->is_debug);
if (retval)
return retval;
inc_wptr(&rl_wptr,
pm->pmf->map_queues_size,
alloc_size_bytes);
}
}
if (xnack_conflict) {
/* pick up processes with the other xnack mode */
xnack_enabled = !xnack_enabled;
xnack_conflict = 0 ;
goto build_runlist_ib;
}
dev_dbg(dev, "Finished map process and queues to runlist\n" );
if (is_over_subscription) {
if (!pm->is_over_subscription)
dev_warn(dev, "Runlist is getting oversubscribed due to%s%s%s%s. Expect reduced ROCm performance.\n" ,
is_over_subscription & OVER_SUBSCRIPTION_PROCESS_COUNT ?
" too many processes" : "" ,
is_over_subscription & OVER_SUBSCRIPTION_COMPUTE_QUEUE_COUNT ?
" too many queues" : "" ,
is_over_subscription & OVER_SUBSCRIPTION_GWS_QUEUE_COUNT ?
" multiple processes using cooperative launch" : "" ,
is_over_subscription & OVER_SUBSCRIPTION_XNACK_CONFLICT ?
" xnack on/off processes mixed on gfx9" : "" );
retval = pm->pmf->runlist(pm, &rl_buffer[rl_wptr],
*rl_gpu_addr,
alloc_size_bytes / sizeof (uint32_t),
true );
}
pm->is_over_subscription = !!is_over_subscription;
for (i = 0 ; i < alloc_size_bytes / sizeof (uint32_t); i++)
pr_debug("0x%2X " , rl_buffer[i]);
pr_debug("\n" );
return retval;
}
int pm_init(struct packet_manager *pm, struct device_queue_manager *dqm)
{
switch (dqm->dev->adev->asic_type) {
case CHIP_KAVERI:
case CHIP_HAWAII:
/* PM4 packet structures on CIK are the same as on VI */
case CHIP_CARRIZO:
case CHIP_TONGA:
case CHIP_FIJI:
case CHIP_POLARIS10:
case CHIP_POLARIS11:
case CHIP_POLARIS12:
case CHIP_VEGAM:
pm->pmf = &kfd_vi_pm_funcs;
break ;
default :
if (KFD_GC_VERSION(dqm->dev) == IP_VERSION(9 , 4 , 2 ) ||
KFD_GC_VERSION(dqm->dev) == IP_VERSION(9 , 4 , 3 ) ||
KFD_GC_VERSION(dqm->dev) == IP_VERSION(9 , 4 , 4 ) ||
KFD_GC_VERSION(dqm->dev) == IP_VERSION(9 , 5 , 0 ))
pm->pmf = &kfd_aldebaran_pm_funcs;
else if (KFD_GC_VERSION(dqm->dev) >= IP_VERSION(9 , 0 , 1 ))
pm->pmf = &kfd_v9_pm_funcs;
else {
WARN(1 , "Unexpected ASIC family %u" ,
dqm->dev->adev->asic_type);
return -EINVAL;
}
}
pm->dqm = dqm;
mutex_init(&pm->lock);
pm->priv_queue = kernel_queue_init(dqm->dev, KFD_QUEUE_TYPE_HIQ);
if (!pm->priv_queue) {
mutex_destroy(&pm->lock);
return -ENOMEM;
}
pm->allocated = false ;
return 0 ;
}
void pm_uninit(struct packet_manager *pm)
{
mutex_destroy(&pm->lock);
kernel_queue_uninit(pm->priv_queue);
pm->priv_queue = NULL;
}
int pm_send_set_resources(struct packet_manager *pm,
struct scheduling_resources *res)
{
struct kfd_node *node = pm->dqm->dev;
struct device *dev = node->adev->dev;
uint32_t *buffer, size;
int retval = 0 ;
size = pm->pmf->set_resources_size;
mutex_lock(&pm->lock);
kq_acquire_packet_buffer(pm->priv_queue,
size / sizeof (uint32_t),
(unsigned int **)&buffer);
if (!buffer) {
dev_err(dev, "Failed to allocate buffer on kernel queue\n" );
retval = -ENOMEM;
goto out;
}
retval = pm->pmf->set_resources(pm, buffer, res);
if (!retval)
retval = kq_submit_packet(pm->priv_queue);
else
kq_rollback_packet(pm->priv_queue);
out:
mutex_unlock(&pm->lock);
return retval;
}
int pm_send_runlist(struct packet_manager *pm, struct list_head *dqm_queues)
{
uint64_t rl_gpu_ib_addr;
uint32_t *rl_buffer;
size_t rl_ib_size, packet_size_dwords;
int retval;
retval = pm_create_runlist_ib(pm, dqm_queues, &rl_gpu_ib_addr,
&rl_ib_size);
if (retval)
goto fail_create_runlist_ib;
pr_debug("runlist IB address: 0x%llX\n" , rl_gpu_ib_addr);
packet_size_dwords = pm->pmf->runlist_size / sizeof (uint32_t);
mutex_lock(&pm->lock);
retval = kq_acquire_packet_buffer(pm->priv_queue,
packet_size_dwords, &rl_buffer);
if (retval)
goto fail_acquire_packet_buffer;
retval = pm->pmf->runlist(pm, rl_buffer, rl_gpu_ib_addr,
rl_ib_size / sizeof (uint32_t), false );
if (retval)
goto fail_create_runlist;
retval = kq_submit_packet(pm->priv_queue);
mutex_unlock(&pm->lock);
return retval;
fail_create_runlist:
kq_rollback_packet(pm->priv_queue);
fail_acquire_packet_buffer:
mutex_unlock(&pm->lock);
fail_create_runlist_ib:
pm_release_ib(pm);
return retval;
}
int pm_send_query_status(struct packet_manager *pm, uint64_t fence_address,
uint64_t fence_value)
{
struct kfd_node *node = pm->dqm->dev;
struct device *dev = node->adev->dev;
uint32_t *buffer, size;
int retval = 0 ;
if (WARN_ON(!fence_address))
return -EFAULT;
size = pm->pmf->query_status_size;
mutex_lock(&pm->lock);
kq_acquire_packet_buffer(pm->priv_queue,
size / sizeof (uint32_t), (unsigned int **)&buffer);
if (!buffer) {
dev_err(dev, "Failed to allocate buffer on kernel queue\n" );
retval = -ENOMEM;
goto out;
}
retval = pm->pmf->query_status(pm, buffer, fence_address, fence_value);
if (!retval)
retval = kq_submit_packet(pm->priv_queue);
else
kq_rollback_packet(pm->priv_queue);
out:
mutex_unlock(&pm->lock);
return retval;
}
/* pm_config_dequeue_wait_counts: Configure dequeue timer Wait Counts
* by writing to CP_IQ_WAIT_TIME2 registers .
*
* @ cmd : See emum kfd_config_dequeue_wait_counts_cmd definition
* @ value : Depends on the cmd . This parameter is unused for
* KFD_DEQUEUE_WAIT_INIT and KFD_DEQUEUE_WAIT_RESET . For
* KFD_DEQUEUE_WAIT_SET_SCH_WAVE it holds value to be set
*
*/
int pm_config_dequeue_wait_counts(struct packet_manager *pm,
enum kfd_config_dequeue_wait_counts_cmd cmd,
uint32_t value)
{
struct kfd_node *node = pm->dqm->dev;
struct device *dev = node->adev->dev;
int retval = 0 ;
uint32_t *buffer, size;
if (!pm->pmf->config_dequeue_wait_counts ||
!pm->pmf->config_dequeue_wait_counts_size)
return 0 ;
if (cmd == KFD_DEQUEUE_WAIT_INIT && (KFD_GC_VERSION(pm->dqm->dev) < IP_VERSION(9 , 4 , 1 ) ||
KFD_GC_VERSION(pm->dqm->dev) >= IP_VERSION(10 , 0 , 0 )))
return 0 ;
size = pm->pmf->config_dequeue_wait_counts_size;
mutex_lock(&pm->lock);
if (size) {
kq_acquire_packet_buffer(pm->priv_queue,
size / sizeof (uint32_t),
(unsigned int **)&buffer);
if (!buffer) {
dev_err(dev,
"Failed to allocate buffer on kernel queue\n" );
retval = -ENOMEM;
goto out;
}
retval = pm->pmf->config_dequeue_wait_counts(pm, buffer,
cmd, value);
if (!retval) {
retval = kq_submit_packet(pm->priv_queue);
/* If default value is modified, cache that in dqm->wait_times */
if (!retval && cmd == KFD_DEQUEUE_WAIT_INIT)
update_dqm_wait_times(pm->dqm);
} else {
kq_rollback_packet(pm->priv_queue);
}
}
out:
mutex_unlock(&pm->lock);
return retval;
}
int pm_send_unmap_queue(struct packet_manager *pm,
enum kfd_unmap_queues_filter filter,
uint32_t filter_param, bool reset)
{
struct kfd_node *node = pm->dqm->dev;
struct device *dev = node->adev->dev;
uint32_t *buffer, size;
int retval = 0 ;
size = pm->pmf->unmap_queues_size;
mutex_lock(&pm->lock);
kq_acquire_packet_buffer(pm->priv_queue,
size / sizeof (uint32_t), (unsigned int **)&buffer);
if (!buffer) {
dev_err(dev, "Failed to allocate buffer on kernel queue\n" );
retval = -ENOMEM;
goto out;
}
retval = pm->pmf->unmap_queues(pm, buffer, filter, filter_param, reset);
if (!retval)
retval = kq_submit_packet(pm->priv_queue);
else
kq_rollback_packet(pm->priv_queue);
out:
mutex_unlock(&pm->lock);
return retval;
}
void pm_release_ib(struct packet_manager *pm)
{
mutex_lock(&pm->lock);
if (pm->allocated) {
kfd_gtt_sa_free(pm->dqm->dev, pm->ib_buffer_obj);
pm->allocated = false ;
}
mutex_unlock(&pm->lock);
}
#if defined (CONFIG_DEBUG_FS)
int pm_debugfs_runlist(struct seq_file *m, void *data)
{
struct packet_manager *pm = data;
mutex_lock(&pm->lock);
if (!pm->allocated) {
seq_puts(m, " No active runlist\n" );
goto out;
}
seq_hex_dump(m, " " , DUMP_PREFIX_OFFSET, 32 , 4 ,
pm->ib_buffer_obj->cpu_ptr, pm->ib_size_bytes, false );
out:
mutex_unlock(&pm->lock);
return 0 ;
}
int pm_debugfs_hang_hws(struct packet_manager *pm)
{
struct kfd_node *node = pm->dqm->dev;
struct device *dev = node->adev->dev;
uint32_t *buffer, size;
int r = 0 ;
if (!pm->priv_queue)
return -EAGAIN;
size = pm->pmf->query_status_size;
mutex_lock(&pm->lock);
kq_acquire_packet_buffer(pm->priv_queue,
size / sizeof (uint32_t), (unsigned int **)&buffer);
if (!buffer) {
dev_err(dev, "Failed to allocate buffer on kernel queue\n" );
r = -ENOMEM;
goto out;
}
memset(buffer, 0 x55, size);
kq_submit_packet(pm->priv_queue);
dev_info(dev, "Submitting %x %x %x %x %x %x %x to HIQ to hang the HWS." ,
buffer[0 ], buffer[1 ], buffer[2 ], buffer[3 ], buffer[4 ],
buffer[5 ], buffer[6 ]);
out:
mutex_unlock(&pm->lock);
return r;
}
#endif
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