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nest-open-source / manifest_repos / mali-driver / f195aa6e0fc5ace54e419c4367fe304c26a00f07 / . / bifrost / r38p2 / kernel / drivers / gpu / arm / midgard / backend / gpu / mali_kbase_jm_rb.c
blob: f9310d17c6ee00a572dd849df006418855e25b26 [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
/*
*
* (C) COPYRIGHT 2014-2022 ARM Limited. All rights reserved.
*
* This program is free software and is provided to you under the terms of the
* GNU General Public License version 2 as published by the Free Software
* Foundation, and any use by you of this program is subject to the terms
* of such GNU license.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, you can access it online at
* http://www.gnu.org/licenses/gpl-2.0.html.
*
*/
/*
* Register-based HW access backend specific APIs
*/
#include <mali_kbase.h>
#include <gpu/mali_kbase_gpu_fault.h>
#include <mali_kbase_hwaccess_jm.h>
#include <mali_kbase_jm.h>
#include <mali_kbase_js.h>
#include <tl/mali_kbase_tracepoints.h>
#include <mali_kbase_hwcnt_context.h>
#include <mali_kbase_reset_gpu.h>
#include <mali_kbase_kinstr_jm.h>
#include <backend/gpu/mali_kbase_cache_policy_backend.h>
#include <device/mali_kbase_device.h>
#include <backend/gpu/mali_kbase_jm_internal.h>
#include <backend/gpu/mali_kbase_pm_internal.h>
/**
* SLOT_RB_EMPTY - Return whether the specified ringbuffer is empty.
*
* @rb: ring buffer
*
* Note: HW access lock must be held
*/
#define SLOT_RB_EMPTY(rb) (rb->write_idx == rb->read_idx)
/**
* SLOT_RB_ENTRIES - Return number of atoms currently in the specified ringbuffer.
*
* @rb: ring buffer
*
* Note: HW access lock must be held
*/
#define SLOT_RB_ENTRIES(rb) ((int)(s8)(rb->write_idx - rb->read_idx))
static void kbase_gpu_release_atom(struct kbase_device *kbdev,
struct kbase_jd_atom *katom,
ktime_t *end_timestamp);
/**
* kbase_gpu_enqueue_atom - Enqueue an atom in the HW access ringbuffer
* @kbdev: Device pointer
* @katom: Atom to enqueue
*
* Context: Caller must hold the HW access lock
*/
static void kbase_gpu_enqueue_atom(struct kbase_device *kbdev,
struct kbase_jd_atom *katom)
{
struct slot_rb *rb = &kbdev->hwaccess.backend.slot_rb[katom->slot_nr];
WARN_ON(SLOT_RB_ENTRIES(rb) >= SLOT_RB_SIZE);
lockdep_assert_held(&kbdev->hwaccess_lock);
rb->entries[rb->write_idx & SLOT_RB_MASK].katom = katom;
rb->write_idx++;
katom->gpu_rb_state = KBASE_ATOM_GPU_RB_WAITING_BLOCKED;
}
/**
* kbase_gpu_dequeue_atom - Remove an atom from the HW access ringbuffer, once
* it has been completed
* @kbdev: Device pointer
* @js: Job slot to remove atom from
* @end_timestamp: Pointer to timestamp of atom completion. May be NULL, in
* which case current time will be used.
*
* Context: Caller must hold the HW access lock
*
* Return: Atom removed from ringbuffer
*/
static struct kbase_jd_atom *kbase_gpu_dequeue_atom(struct kbase_device *kbdev,
int js,
ktime_t *end_timestamp)
{
struct slot_rb *rb = &kbdev->hwaccess.backend.slot_rb[js];
struct kbase_jd_atom *katom;
if (SLOT_RB_EMPTY(rb)) {
WARN(1, "GPU ringbuffer unexpectedly empty\n");
return NULL;
}
lockdep_assert_held(&kbdev->hwaccess_lock);
katom = rb->entries[rb->read_idx & SLOT_RB_MASK].katom;
kbase_gpu_release_atom(kbdev, katom, end_timestamp);
rb->read_idx++;
katom->gpu_rb_state = KBASE_ATOM_GPU_RB_NOT_IN_SLOT_RB;
return katom;
}
struct kbase_jd_atom *kbase_gpu_inspect(struct kbase_device *kbdev, int js,
int idx)
{
struct slot_rb *rb = &kbdev->hwaccess.backend.slot_rb[js];
lockdep_assert_held(&kbdev->hwaccess_lock);
if ((SLOT_RB_ENTRIES(rb) - 1) < idx)
return NULL; /* idx out of range */
return rb->entries[(rb->read_idx + idx) & SLOT_RB_MASK].katom;
}
struct kbase_jd_atom *kbase_backend_inspect_tail(struct kbase_device *kbdev,
int js)
{
struct slot_rb *rb = &kbdev->hwaccess.backend.slot_rb[js];
if (SLOT_RB_EMPTY(rb))
return NULL;
return rb->entries[(rb->write_idx - 1) & SLOT_RB_MASK].katom;
}
bool kbase_gpu_atoms_submitted_any(struct kbase_device *kbdev)
{
int js;
int i;
lockdep_assert_held(&kbdev->hwaccess_lock);
for (js = 0; js < kbdev->gpu_props.num_job_slots; js++) {
for (i = 0; i < SLOT_RB_SIZE; i++) {
struct kbase_jd_atom *katom = kbase_gpu_inspect(kbdev, js, i);
if (katom && katom->gpu_rb_state == KBASE_ATOM_GPU_RB_SUBMITTED)
return true;
}
}
return false;
}
int kbase_backend_nr_atoms_submitted(struct kbase_device *kbdev, int js)
{
int nr = 0;
int i;
lockdep_assert_held(&kbdev->hwaccess_lock);
for (i = 0; i < SLOT_RB_SIZE; i++) {
struct kbase_jd_atom *katom = kbase_gpu_inspect(kbdev, js, i);
if (katom && (katom->gpu_rb_state ==
KBASE_ATOM_GPU_RB_SUBMITTED))
nr++;
}
return nr;
}
int kbase_backend_nr_atoms_on_slot(struct kbase_device *kbdev, int js)
{
int nr = 0;
int i;
lockdep_assert_held(&kbdev->hwaccess_lock);
for (i = 0; i < SLOT_RB_SIZE; i++) {
if (kbase_gpu_inspect(kbdev, js, i))
nr++;
}
return nr;
}
static int kbase_gpu_nr_atoms_on_slot_min(struct kbase_device *kbdev, int js,
enum kbase_atom_gpu_rb_state min_rb_state)
{
int nr = 0;
int i;
lockdep_assert_held(&kbdev->hwaccess_lock);
for (i = 0; i < SLOT_RB_SIZE; i++) {
struct kbase_jd_atom *katom = kbase_gpu_inspect(kbdev, js, i);
if (katom && (katom->gpu_rb_state >= min_rb_state))
nr++;
}
return nr;
}
/**
* check_secure_atom - Check if the given atom is in the given secure state and
* has a ringbuffer state of at least
* KBASE_ATOM_GPU_RB_WAITING_PROTECTED_MODE_TRANSITION
* @katom: Atom pointer
* @secure: Desired secure state
*
* Return: true if atom is in the given state, false otherwise
*/
static bool check_secure_atom(struct kbase_jd_atom *katom, bool secure)
{
if (katom->gpu_rb_state >=
KBASE_ATOM_GPU_RB_WAITING_PROTECTED_MODE_TRANSITION &&
((kbase_jd_katom_is_protected(katom) && secure) ||
(!kbase_jd_katom_is_protected(katom) && !secure)))
return true;
return false;
}
/**
* kbase_gpu_check_secure_atoms - Check if there are any atoms in the given
* secure state in the ringbuffers of at least
* state
* KBASE_ATOM_GPU_RB_WAITING_FOR_CORE_AVAILABLE
* @kbdev: Device pointer
* @secure: Desired secure state
*
* Return: true if any atoms are in the given state, false otherwise
*/
static bool kbase_gpu_check_secure_atoms(struct kbase_device *kbdev,
bool secure)
{
int js, i;
for (js = 0; js < kbdev->gpu_props.num_job_slots; js++) {
for (i = 0; i < SLOT_RB_SIZE; i++) {
struct kbase_jd_atom *katom = kbase_gpu_inspect(kbdev,
js, i);
if (katom) {
if (check_secure_atom(katom, secure))
return true;
}
}
}
return false;
}
int kbase_backend_slot_free(struct kbase_device *kbdev, int js)
{
lockdep_assert_held(&kbdev->hwaccess_lock);
if (atomic_read(&kbdev->hwaccess.backend.reset_gpu) !=
KBASE_RESET_GPU_NOT_PENDING) {
/* The GPU is being reset - so prevent submission */
return 0;
}
return SLOT_RB_SIZE - kbase_backend_nr_atoms_on_slot(kbdev, js);
}
static void kbase_gpu_release_atom(struct kbase_device *kbdev,
struct kbase_jd_atom *katom,
ktime_t *end_timestamp)
{
struct kbase_context *kctx = katom->kctx;
lockdep_assert_held(&kbdev->hwaccess_lock);
switch (katom->gpu_rb_state) {
case KBASE_ATOM_GPU_RB_NOT_IN_SLOT_RB:
/* Should be impossible */
WARN(1, "Attempting to release atom not in ringbuffer\n");
break;
case KBASE_ATOM_GPU_RB_SUBMITTED:
kbase_kinstr_jm_atom_hw_release(katom);
/* Inform power management at start/finish of atom so it can
* update its GPU utilisation metrics. Mark atom as not
* submitted beforehand.
*/
katom->gpu_rb_state = KBASE_ATOM_GPU_RB_READY;
kbase_pm_metrics_update(kbdev, end_timestamp);
/* Inform platform at start/finish of atom */
kbasep_platform_event_atom_complete(katom);
if (katom->core_req & BASE_JD_REQ_PERMON)
kbase_pm_release_gpu_cycle_counter_nolock(kbdev);
KBASE_TLSTREAM_TL_NRET_ATOM_LPU(kbdev, katom,
&kbdev->gpu_props.props.raw_props.js_features
[katom->slot_nr]);
KBASE_TLSTREAM_TL_NRET_ATOM_AS(kbdev, katom, &kbdev->as[kctx->as_nr]);
KBASE_TLSTREAM_TL_NRET_CTX_LPU(kbdev, kctx,
&kbdev->gpu_props.props.raw_props.js_features
[katom->slot_nr]);
/* ***FALLTHROUGH: TRANSITION TO LOWER STATE*** */
fallthrough;
case KBASE_ATOM_GPU_RB_READY:
/* ***FALLTHROUGH: TRANSITION TO LOWER STATE*** */
fallthrough;
case KBASE_ATOM_GPU_RB_WAITING_FOR_CORE_AVAILABLE:
break;
case KBASE_ATOM_GPU_RB_WAITING_PROTECTED_MODE_TRANSITION:
if (kbase_jd_katom_is_protected(katom) &&
(katom->protected_state.enter !=
KBASE_ATOM_ENTER_PROTECTED_CHECK) &&
(katom->protected_state.enter !=
KBASE_ATOM_ENTER_PROTECTED_HWCNT)) {
kbase_pm_protected_override_disable(kbdev);
kbase_pm_update_cores_state_nolock(kbdev);
}
if (kbase_jd_katom_is_protected(katom) &&
(katom->protected_state.enter ==
KBASE_ATOM_ENTER_PROTECTED_IDLE_L2))
kbase_pm_protected_entry_override_disable(kbdev);
if (!kbase_jd_katom_is_protected(katom) &&
(katom->protected_state.exit !=
KBASE_ATOM_EXIT_PROTECTED_CHECK) &&
(katom->protected_state.exit !=
KBASE_ATOM_EXIT_PROTECTED_RESET_WAIT)) {
kbase_pm_protected_override_disable(kbdev);
kbase_pm_update_cores_state_nolock(kbdev);
}
if (katom->protected_state.enter !=
KBASE_ATOM_ENTER_PROTECTED_CHECK ||
katom->protected_state.exit !=
KBASE_ATOM_EXIT_PROTECTED_CHECK)
kbdev->protected_mode_transition = false;
/* If the atom is at KBASE_ATOM_ENTER_PROTECTED_HWCNT state, it means
* one of two events prevented it from progressing to the next state and
* ultimately reach protected mode:
* - hwcnts were enabled, and the atom had to schedule a worker to
* disable them.
* - the hwcnts were already disabled, but some other error occurred.
* In the first case, if the worker has not yet completed
* (kbdev->protected_mode_hwcnt_disabled == false), we need to re-enable
* them and signal to the worker they have already been enabled
*/
if (kbase_jd_katom_is_protected(katom) &&
(katom->protected_state.enter == KBASE_ATOM_ENTER_PROTECTED_HWCNT)) {
kbdev->protected_mode_hwcnt_desired = true;
if (kbdev->protected_mode_hwcnt_disabled) {
kbase_hwcnt_context_enable(kbdev->hwcnt_gpu_ctx);
kbdev->protected_mode_hwcnt_disabled = false;
}
}
/* If the atom has suspended hwcnt but has not yet entered
* protected mode, then resume hwcnt now. If the GPU is now in
* protected mode then hwcnt will be resumed by GPU reset so
* don't resume it here.
*/
if (kbase_jd_katom_is_protected(katom) &&
((katom->protected_state.enter == KBASE_ATOM_ENTER_PROTECTED_IDLE_L2) ||
(katom->protected_state.enter == KBASE_ATOM_ENTER_PROTECTED_SET_COHERENCY) ||
(katom->protected_state.enter == KBASE_ATOM_ENTER_PROTECTED_FINISHED))) {
WARN_ON(!kbdev->protected_mode_hwcnt_disabled);
kbdev->protected_mode_hwcnt_desired = true;
if (kbdev->protected_mode_hwcnt_disabled) {
kbase_hwcnt_context_enable(
kbdev->hwcnt_gpu_ctx);
kbdev->protected_mode_hwcnt_disabled = false;
}
}
if (kbase_hw_has_issue(kbdev, BASE_HW_ISSUE_TGOX_R1_1234)) {
if (katom->atom_flags &
KBASE_KATOM_FLAG_HOLDING_L2_REF_PROT) {
kbase_pm_protected_l2_override(kbdev, false);
katom->atom_flags &=
~KBASE_KATOM_FLAG_HOLDING_L2_REF_PROT;
}
}
/* ***FALLTHROUGH: TRANSITION TO LOWER STATE*** */
fallthrough;
case KBASE_ATOM_GPU_RB_WAITING_PROTECTED_MODE_PREV:
/* ***FALLTHROUGH: TRANSITION TO LOWER STATE*** */
fallthrough;
case KBASE_ATOM_GPU_RB_WAITING_BLOCKED:
/* ***FALLTHROUGH: TRANSITION TO LOWER STATE*** */
fallthrough;
case KBASE_ATOM_GPU_RB_RETURN_TO_JS:
break;
}
katom->gpu_rb_state = KBASE_ATOM_GPU_RB_WAITING_BLOCKED;
katom->protected_state.exit = KBASE_ATOM_EXIT_PROTECTED_CHECK;
}
static void kbase_gpu_mark_atom_for_return(struct kbase_device *kbdev,
struct kbase_jd_atom *katom)
{
lockdep_assert_held(&kbdev->hwaccess_lock);
KBASE_KTRACE_ADD_JM_SLOT_INFO(kbdev, JM_MARK_FOR_RETURN_TO_JS,
katom->kctx, katom, katom->jc,
katom->slot_nr, katom->event_code);
kbase_gpu_release_atom(kbdev, katom, NULL);
katom->gpu_rb_state = KBASE_ATOM_GPU_RB_RETURN_TO_JS;
}
/**
* other_slots_busy - Determine if any job slots other than @js are currently
* running atoms
* @kbdev: Device pointer
* @js: Job slot
*
* Return: true if any slots other than @js are busy, false otherwise
*/
static inline bool other_slots_busy(struct kbase_device *kbdev, int js)
{
int slot;
for (slot = 0; slot < kbdev->gpu_props.num_job_slots; slot++) {
if (slot == js)
continue;
if (kbase_gpu_nr_atoms_on_slot_min(kbdev, slot,
KBASE_ATOM_GPU_RB_SUBMITTED))
return true;
}
return false;
}
static inline bool kbase_gpu_in_protected_mode(struct kbase_device *kbdev)
{
return kbdev->protected_mode;
}
static void kbase_gpu_disable_coherent(struct kbase_device *kbdev)
{
lockdep_assert_held(&kbdev->hwaccess_lock);
/*
* When entering into protected mode, we must ensure that the
* GPU is not operating in coherent mode as well. This is to
* ensure that no protected memory can be leaked.
*/
if (kbdev->system_coherency == COHERENCY_ACE)
kbase_cache_set_coherency_mode(kbdev, COHERENCY_ACE_LITE);
}
static int kbase_gpu_protected_mode_enter(struct kbase_device *kbdev)
{
int err = -EINVAL;
lockdep_assert_held(&kbdev->hwaccess_lock);
WARN_ONCE(!kbdev->protected_ops,
"Cannot enter protected mode: protected callbacks not specified.\n");
if (kbdev->protected_ops) {
/* Switch GPU to protected mode */
err = kbdev->protected_ops->protected_mode_enable(
kbdev->protected_dev);
if (err) {
dev_warn(kbdev->dev, "Failed to enable protected mode: %d\n",
err);
} else {
kbdev->protected_mode = true;
kbase_ipa_protection_mode_switch_event(kbdev);
}
}
return err;
}
static int kbase_gpu_protected_mode_reset(struct kbase_device *kbdev)
{
lockdep_assert_held(&kbdev->hwaccess_lock);
WARN_ONCE(!kbdev->protected_ops,
"Cannot exit protected mode: protected callbacks not specified.\n");
if (!kbdev->protected_ops)
return -EINVAL;
/* The protected mode disable callback will be called as part of reset
*/
return kbase_reset_gpu_silent(kbdev);
}
static int kbase_jm_protected_entry(struct kbase_device *kbdev,
struct kbase_jd_atom **katom, int idx, int js)
{
int err = 0;
lockdep_assert_held(&kbdev->hwaccess_lock);
err = kbase_gpu_protected_mode_enter(kbdev);
/*
* Regardless of result before this call, we are no longer
* transitioning the GPU.
*/
kbdev->protected_mode_transition = false;
kbase_pm_protected_override_disable(kbdev);
kbase_pm_update_cores_state_nolock(kbdev);
KBASE_TLSTREAM_AUX_PROTECTED_ENTER_END(kbdev, kbdev);
if (err) {
/*
* Failed to switch into protected mode.
*
* At this point we expect:
* katom->gpu_rb_state = KBASE_ATOM_GPU_RB_WAITING_PROTECTED_MODE_TRANSITION &&
* katom->protected_state.enter = KBASE_ATOM_ENTER_PROTECTED_FINISHED
* ==>
* kbdev->protected_mode_hwcnt_disabled = false
*/
katom[idx]->event_code = BASE_JD_EVENT_JOB_INVALID;
kbase_gpu_mark_atom_for_return(kbdev, katom[idx]);
/*
* Only return if head atom or previous atom
* already removed - as atoms must be returned
* in order.
*/
if (idx == 0 || katom[0]->gpu_rb_state ==
KBASE_ATOM_GPU_RB_NOT_IN_SLOT_RB) {
kbase_gpu_dequeue_atom(kbdev, js, NULL);
kbase_jm_return_atom_to_js(kbdev, katom[idx]);
}
return -EINVAL;
}
/*
* Protected mode sanity checks.
*/
WARN(kbase_jd_katom_is_protected(katom[idx]) != kbase_gpu_in_protected_mode(kbdev),
"Protected mode of atom (%d) doesn't match protected mode of GPU (%d)",
kbase_jd_katom_is_protected(katom[idx]), kbase_gpu_in_protected_mode(kbdev));
katom[idx]->gpu_rb_state =
KBASE_ATOM_GPU_RB_READY;
return err;
}
static int kbase_jm_enter_protected_mode(struct kbase_device *kbdev,
struct kbase_jd_atom **katom, int idx, int js)
{
int err = 0;
lockdep_assert_held(&kbdev->hwaccess_lock);
switch (katom[idx]->protected_state.enter) {
case KBASE_ATOM_ENTER_PROTECTED_CHECK:
KBASE_TLSTREAM_AUX_PROTECTED_ENTER_START(kbdev, kbdev);
/* The checks in KBASE_ATOM_GPU_RB_WAITING_PROTECTED_MODE_PREV
* should ensure that we are not already transition, and that
* there are no atoms currently on the GPU.
*/
WARN_ON(kbdev->protected_mode_transition);
WARN_ON(kbase_gpu_atoms_submitted_any(kbdev));
/* If hwcnt is disabled, it means we didn't clean up correctly
* during last exit from protected mode.
*/
WARN_ON(kbdev->protected_mode_hwcnt_disabled);
katom[idx]->protected_state.enter =
KBASE_ATOM_ENTER_PROTECTED_HWCNT;
kbdev->protected_mode_transition = true;
/* ***TRANSITION TO HIGHER STATE*** */
fallthrough;
case KBASE_ATOM_ENTER_PROTECTED_HWCNT:
/* See if we can get away with disabling hwcnt atomically */
kbdev->protected_mode_hwcnt_desired = false;
if (!kbdev->protected_mode_hwcnt_disabled) {
if (kbase_hwcnt_context_disable_atomic(
kbdev->hwcnt_gpu_ctx))
kbdev->protected_mode_hwcnt_disabled = true;
}
/* We couldn't disable atomically, so kick off a worker */
if (!kbdev->protected_mode_hwcnt_disabled) {
kbase_hwcnt_context_queue_work(
kbdev->hwcnt_gpu_ctx,
&kbdev->protected_mode_hwcnt_disable_work);
return -EAGAIN;
}
/* Once reaching this point GPU must be switched to protected
* mode or hwcnt re-enabled.
*/
if (kbase_pm_protected_entry_override_enable(kbdev))
return -EAGAIN;
/*
* Not in correct mode, begin protected mode switch.
* Entering protected mode requires us to power down the L2,
* and drop out of fully coherent mode.
*/
katom[idx]->protected_state.enter =
KBASE_ATOM_ENTER_PROTECTED_IDLE_L2;
kbase_pm_protected_override_enable(kbdev);
/*
* Only if the GPU reset hasn't been initiated, there is a need
* to invoke the state machine to explicitly power down the
* shader cores and L2.
*/
if (!kbdev->pm.backend.protected_entry_transition_override)
kbase_pm_update_cores_state_nolock(kbdev);
/* ***TRANSITION TO HIGHER STATE*** */
fallthrough;
case KBASE_ATOM_ENTER_PROTECTED_IDLE_L2:
/* Avoid unnecessary waiting on non-ACE platforms. */
if (kbdev->system_coherency == COHERENCY_ACE) {
if (kbdev->pm.backend.l2_always_on) {
/*
* If the GPU reset hasn't completed, then L2
* could still be powered up.
*/
if (kbase_reset_gpu_is_active(kbdev))
return -EAGAIN;
}
if (kbase_pm_get_ready_cores(kbdev,
KBASE_PM_CORE_L2) ||
kbase_pm_get_trans_cores(kbdev,
KBASE_PM_CORE_L2) ||
kbase_is_gpu_removed(kbdev)) {
/*
* The L2 is still powered, wait for all
* the users to finish with it before doing
* the actual reset.
*/
return -EAGAIN;
}
}
katom[idx]->protected_state.enter =
KBASE_ATOM_ENTER_PROTECTED_SET_COHERENCY;
/* ***TRANSITION TO HIGHER STATE*** */
fallthrough;
case KBASE_ATOM_ENTER_PROTECTED_SET_COHERENCY:
/*
* When entering into protected mode, we must ensure that the
* GPU is not operating in coherent mode as well. This is to
* ensure that no protected memory can be leaked.
*/
kbase_gpu_disable_coherent(kbdev);
kbase_pm_protected_entry_override_disable(kbdev);
if (kbase_hw_has_issue(kbdev, BASE_HW_ISSUE_TGOX_R1_1234)) {
/*
* Power on L2 caches; this will also result in the
* correct value written to coherency enable register.
*/
kbase_pm_protected_l2_override(kbdev, true);
/*
* Set the flag on the atom that additional
* L2 references are taken.
*/
katom[idx]->atom_flags |=
KBASE_KATOM_FLAG_HOLDING_L2_REF_PROT;
}
katom[idx]->protected_state.enter =
KBASE_ATOM_ENTER_PROTECTED_FINISHED;
if (kbase_hw_has_issue(kbdev, BASE_HW_ISSUE_TGOX_R1_1234))
return -EAGAIN;
/* ***TRANSITION TO HIGHER STATE*** */
fallthrough;
case KBASE_ATOM_ENTER_PROTECTED_FINISHED:
if (kbase_hw_has_issue(kbdev, BASE_HW_ISSUE_TGOX_R1_1234)) {
/*
* Check that L2 caches are powered and, if so,
* enter protected mode.
*/
if (kbdev->pm.backend.l2_state == KBASE_L2_ON) {
/*
* Remove additional L2 reference and reset
* the atom flag which denotes it.
*/
if (katom[idx]->atom_flags &
KBASE_KATOM_FLAG_HOLDING_L2_REF_PROT) {
kbase_pm_protected_l2_override(kbdev,
false);
katom[idx]->atom_flags &=
~KBASE_KATOM_FLAG_HOLDING_L2_REF_PROT;
}
err = kbase_jm_protected_entry(kbdev, katom, idx, js);
if (err)
return err;
} else {
/*
* still waiting for L2 caches to power up
*/
return -EAGAIN;
}
} else {
err = kbase_jm_protected_entry(kbdev, katom, idx, js);
if (err)
return err;
}
}
return 0;
}
static int kbase_jm_exit_protected_mode(struct kbase_device *kbdev,
struct kbase_jd_atom **katom, int idx, int js)
{
int err = 0;
lockdep_assert_held(&kbdev->hwaccess_lock);
switch (katom[idx]->protected_state.exit) {
case KBASE_ATOM_EXIT_PROTECTED_CHECK:
KBASE_TLSTREAM_AUX_PROTECTED_LEAVE_START(kbdev, kbdev);
/* The checks in KBASE_ATOM_GPU_RB_WAITING_PROTECTED_MODE_PREV
* should ensure that we are not already transition, and that
* there are no atoms currently on the GPU.
*/
WARN_ON(kbdev->protected_mode_transition);
WARN_ON(kbase_gpu_atoms_submitted_any(kbdev));
/*
* Exiting protected mode requires a reset, but first the L2
* needs to be powered down to ensure it's not active when the
* reset is issued.
*/
katom[idx]->protected_state.exit =
KBASE_ATOM_EXIT_PROTECTED_IDLE_L2;
kbdev->protected_mode_transition = true;
kbase_pm_protected_override_enable(kbdev);
kbase_pm_update_cores_state_nolock(kbdev);
/* ***TRANSITION TO HIGHER STATE*** */
fallthrough;
case KBASE_ATOM_EXIT_PROTECTED_IDLE_L2:
if (kbdev->pm.backend.l2_state != KBASE_L2_OFF) {
/*
* The L2 is still powered, wait for all the users to
* finish with it before doing the actual reset.
*/
return -EAGAIN;
}
katom[idx]->protected_state.exit =
KBASE_ATOM_EXIT_PROTECTED_RESET;
/* ***TRANSITION TO HIGHER STATE*** */
fallthrough;
case KBASE_ATOM_EXIT_PROTECTED_RESET:
/* L2 cache has been turned off (which is needed prior to the reset of GPU
* to exit the protected mode), so the override flag can be safely cleared.
* Even if L2 cache is powered up again before the actual reset, it should
* not be an issue (there are no jobs running on the GPU).
*/
kbase_pm_protected_override_disable(kbdev);
/* Issue the reset to the GPU */
err = kbase_gpu_protected_mode_reset(kbdev);
if (err == -EAGAIN)
return -EAGAIN;
if (err) {
kbdev->protected_mode_transition = false;
/* Failed to exit protected mode, fail atom */
katom[idx]->event_code = BASE_JD_EVENT_JOB_INVALID;
kbase_gpu_mark_atom_for_return(kbdev, katom[idx]);
/* Only return if head atom or previous atom
* already removed - as atoms must be returned in order
*/
if (idx == 0 || katom[0]->gpu_rb_state ==
KBASE_ATOM_GPU_RB_NOT_IN_SLOT_RB) {
kbase_gpu_dequeue_atom(kbdev, js, NULL);
kbase_jm_return_atom_to_js(kbdev, katom[idx]);
}
/* If we're exiting from protected mode, hwcnt must have
* been disabled during entry.
*/
WARN_ON(!kbdev->protected_mode_hwcnt_disabled);
kbdev->protected_mode_hwcnt_desired = true;
if (kbdev->protected_mode_hwcnt_disabled) {
kbase_hwcnt_context_enable(
kbdev->hwcnt_gpu_ctx);
kbdev->protected_mode_hwcnt_disabled = false;
}
return -EINVAL;
}
katom[idx]->protected_state.exit =
KBASE_ATOM_EXIT_PROTECTED_RESET_WAIT;
/* ***TRANSITION TO HIGHER STATE*** */
fallthrough;
case KBASE_ATOM_EXIT_PROTECTED_RESET_WAIT:
/* A GPU reset is issued when exiting protected mode. Once the
* reset is done all atoms' state will also be reset. For this
* reason, if the atom is still in this state we can safely
* say that the reset has not completed i.e., we have not
* finished exiting protected mode yet.
*/
return -EAGAIN;
}
return 0;
}
void kbase_backend_slot_update(struct kbase_device *kbdev)
{
int js;
lockdep_assert_held(&kbdev->hwaccess_lock);
#ifdef CONFIG_MALI_ARBITER_SUPPORT
if (kbase_reset_gpu_is_active(kbdev) ||
kbase_is_gpu_removed(kbdev))
#else
if (kbase_reset_gpu_is_active(kbdev))
#endif
return;
for (js = 0; js < kbdev->gpu_props.num_job_slots; js++) {
struct kbase_jd_atom *katom[2];
int idx;
katom[0] = kbase_gpu_inspect(kbdev, js, 0);
katom[1] = kbase_gpu_inspect(kbdev, js, 1);
WARN_ON(katom[1] && !katom[0]);
for (idx = 0; idx < SLOT_RB_SIZE; idx++) {
bool cores_ready;
int ret;
if (!katom[idx])
continue;
switch (katom[idx]->gpu_rb_state) {
case KBASE_ATOM_GPU_RB_NOT_IN_SLOT_RB:
/* Should be impossible */
WARN(1, "Attempting to update atom not in ringbuffer\n");
break;
case KBASE_ATOM_GPU_RB_WAITING_BLOCKED:
if (kbase_js_atom_blocked_on_x_dep(katom[idx]))
break;
katom[idx]->gpu_rb_state =
KBASE_ATOM_GPU_RB_WAITING_PROTECTED_MODE_PREV;
/* ***TRANSITION TO HIGHER STATE*** */
fallthrough;
case KBASE_ATOM_GPU_RB_WAITING_PROTECTED_MODE_PREV:
if (kbase_gpu_check_secure_atoms(kbdev,
!kbase_jd_katom_is_protected(
katom[idx])))
break;
if ((idx == 1) && (kbase_jd_katom_is_protected(
katom[0]) !=
kbase_jd_katom_is_protected(
katom[1])))
break;
if (kbdev->protected_mode_transition)
break;
katom[idx]->gpu_rb_state =
KBASE_ATOM_GPU_RB_WAITING_PROTECTED_MODE_TRANSITION;
/* ***TRANSITION TO HIGHER STATE*** */
fallthrough;
case KBASE_ATOM_GPU_RB_WAITING_PROTECTED_MODE_TRANSITION:
/*
* Exiting protected mode must be done before
* the references on the cores are taken as
* a power down the L2 is required which
* can't happen after the references for this
* atom are taken.
*/
if (!kbase_gpu_in_protected_mode(kbdev) &&
kbase_jd_katom_is_protected(katom[idx])) {
/* Atom needs to transition into protected mode. */
ret = kbase_jm_enter_protected_mode(kbdev,
katom, idx, js);
if (ret)
break;
} else if (kbase_gpu_in_protected_mode(kbdev) &&
!kbase_jd_katom_is_protected(katom[idx])) {
/* Atom needs to transition out of protected mode. */
ret = kbase_jm_exit_protected_mode(kbdev,
katom, idx, js);
if (ret)
break;
}
katom[idx]->protected_state.exit =
KBASE_ATOM_EXIT_PROTECTED_CHECK;
/* Atom needs no protected mode transition. */
katom[idx]->gpu_rb_state =
KBASE_ATOM_GPU_RB_WAITING_FOR_CORE_AVAILABLE;
/* ***TRANSITION TO HIGHER STATE*** */
fallthrough;
case KBASE_ATOM_GPU_RB_WAITING_FOR_CORE_AVAILABLE:
if (katom[idx]->will_fail_event_code) {
kbase_gpu_mark_atom_for_return(kbdev,
katom[idx]);
/* Set EVENT_DONE so this atom will be
* completed, not unpulled.
*/
katom[idx]->event_code =
BASE_JD_EVENT_DONE;
/* Only return if head atom or previous
* atom already removed - as atoms must
* be returned in order.
*/
if (idx == 0 || katom[0]->gpu_rb_state ==
KBASE_ATOM_GPU_RB_NOT_IN_SLOT_RB) {
kbase_gpu_dequeue_atom(kbdev, js, NULL);
kbase_jm_return_atom_to_js(kbdev, katom[idx]);
}
break;
}
cores_ready = kbase_pm_cores_requested(kbdev,
true);
if (!cores_ready)
break;
katom[idx]->gpu_rb_state =
KBASE_ATOM_GPU_RB_READY;
/* ***TRANSITION TO HIGHER STATE*** */
fallthrough;
case KBASE_ATOM_GPU_RB_READY:
if (idx == 1) {
/* Only submit if head atom or previous
* atom already submitted
*/
if ((katom[0]->gpu_rb_state !=
KBASE_ATOM_GPU_RB_SUBMITTED &&
katom[0]->gpu_rb_state !=
KBASE_ATOM_GPU_RB_NOT_IN_SLOT_RB))
break;
/* If intra-slot serialization in use
* then don't submit atom to NEXT slot
*/
if (kbdev->serialize_jobs &
KBASE_SERIALIZE_INTRA_SLOT)
break;
}
/* If inter-slot serialization in use then don't
* submit atom if any other slots are in use
*/
if ((kbdev->serialize_jobs &
KBASE_SERIALIZE_INTER_SLOT) &&
other_slots_busy(kbdev, js))
break;
#ifdef CONFIG_MALI_GEM5_BUILD
if (!kbasep_jm_is_js_free(kbdev, js,
katom[idx]->kctx))
break;
#endif
/* Check if this job needs the cycle counter
* enabled before submission
*/
if (katom[idx]->core_req & BASE_JD_REQ_PERMON)
kbase_pm_request_gpu_cycle_counter_l2_is_on(
kbdev);
if (!kbase_job_hw_submit(kbdev, katom[idx], js))
katom[idx]->gpu_rb_state = KBASE_ATOM_GPU_RB_SUBMITTED;
else
break;
/* ***TRANSITION TO HIGHER STATE*** */
fallthrough;
case KBASE_ATOM_GPU_RB_SUBMITTED:
/* Inform power management at start/finish of
* atom so it can update its GPU utilisation
* metrics.
*/
kbase_pm_metrics_update(kbdev,
&katom[idx]->start_timestamp);
/* Inform platform at start/finish of atom */
kbasep_platform_event_atom_submit(katom[idx]);
break;
case KBASE_ATOM_GPU_RB_RETURN_TO_JS:
/* Only return if head atom or previous atom
* already removed - as atoms must be returned
* in order
*/
if (idx == 0 || katom[0]->gpu_rb_state ==
KBASE_ATOM_GPU_RB_NOT_IN_SLOT_RB) {
kbase_gpu_dequeue_atom(kbdev, js, NULL);
kbase_jm_return_atom_to_js(kbdev,
katom[idx]);
}
break;
}
}
}
}
void kbase_backend_run_atom(struct kbase_device *kbdev,
struct kbase_jd_atom *katom)
{
lockdep_assert_held(&kbdev->hwaccess_lock);
dev_dbg(kbdev->dev, "Backend running atom %pK\n", (void *)katom);
kbase_gpu_enqueue_atom(kbdev, katom);
kbase_backend_slot_update(kbdev);
}
/**
* kbase_rb_atom_might_depend - determine if one atom in the slot ringbuffer
* might depend on another from the same kctx
* @katom_a: depended atom
* @katom_b: atom to query
*
* This can be used on atoms that belong to different slot ringbuffers
*
* Return: true if @katom_b might depend on @katom_a, false if it cannot depend.
*/
static inline bool
kbase_rb_atom_might_depend(const struct kbase_jd_atom *katom_a,
const struct kbase_jd_atom *katom_b)
{
if (katom_a->kctx != katom_b->kctx)
return false;
return (katom_b->pre_dep ||
(katom_b->atom_flags & (KBASE_KATOM_FLAG_X_DEP_BLOCKED |
KBASE_KATOM_FLAG_FAIL_BLOCKER)));
}
/**
* kbase_gpu_irq_evict - evict a slot's JSn_HEAD_NEXT atom from the HW if it is
* related to a failed JSn_HEAD atom
* @kbdev: kbase device
* @js: job slot to check
* @completion_code: completion code of the failed atom
*
* Note: 'STOPPED' atoms are considered 'failed', as they are in the HW, but
* unlike other failure codes we _can_ re-run them.
*
* This forms step 1 in a 2-step process of removing any related atoms from a
* slot's JSn_HEAD_NEXT (ringbuffer index 1), should there have
* been a 'failure' on an atom in JSn_HEAD (ringbuffer index 0).
*
* This step only removes the atoms from the HW, and marks them as
* (potentially) ready to run again.
*
* Step 2 is on marking the JSn_HEAD atom as complete
* (kbase_gpu_complete_hw()), to dequeue said atoms and return them to the JS
* as appropriate, or re-submit them.
*
* Hence, this function must evict at a minimum the atoms related to the atom
* in JSn_HEAD that kbase_gpu_complete_hw() will also dequeue. It is acceptable
* if this function evicts more atoms than kbase_gpu_complete_hw() dequeues, as
* the next kbase_backend_slot_update() will resubmit any remaining.
*
* Return: true if an atom was evicted, false otherwise.
*/
bool kbase_gpu_irq_evict(struct kbase_device *kbdev, int js,
u32 completion_code)
{
struct kbase_jd_atom *katom;
struct kbase_jd_atom *next_katom;
lockdep_assert_held(&kbdev->hwaccess_lock);
katom = kbase_gpu_inspect(kbdev, js, 0);
next_katom = kbase_gpu_inspect(kbdev, js, 1);
if (next_katom &&
next_katom->gpu_rb_state == KBASE_ATOM_GPU_RB_SUBMITTED &&
(kbase_rb_atom_might_depend(katom, next_katom) ||
kbase_js_atom_runs_before(kbdev, katom, next_katom, 0u)) &&
(kbase_reg_read(kbdev, JOB_SLOT_REG(js, JS_HEAD_NEXT_LO)) != 0 ||
kbase_reg_read(kbdev, JOB_SLOT_REG(js, JS_HEAD_NEXT_HI)) != 0)) {
kbase_reg_write(kbdev, JOB_SLOT_REG(js, JS_COMMAND_NEXT),
JS_COMMAND_NOP);
next_katom->gpu_rb_state = KBASE_ATOM_GPU_RB_READY;
if (completion_code == BASE_JD_EVENT_STOPPED) {
KBASE_TLSTREAM_TL_NRET_ATOM_LPU(kbdev, next_katom,
&kbdev->gpu_props.props.raw_props.js_features
[next_katom->slot_nr]);
KBASE_TLSTREAM_TL_NRET_ATOM_AS(kbdev, next_katom, &kbdev->as
[next_katom->kctx->as_nr]);
KBASE_TLSTREAM_TL_NRET_CTX_LPU(kbdev, next_katom->kctx,
&kbdev->gpu_props.props.raw_props.js_features
[next_katom->slot_nr]);
}
if (next_katom->core_req & BASE_JD_REQ_PERMON)
kbase_pm_release_gpu_cycle_counter_nolock(kbdev);
/* On evicting the next_katom, the last submission kctx on the
* given job slot then reverts back to the one that owns katom.
* The aim is to enable the next submission that can determine
* if the read only shader core L1 cache should be invalidated.
*/
kbdev->hwaccess.backend.slot_rb[js].last_kctx_tagged =
SLOT_RB_TAG_KCTX(katom->kctx);
return true;
}
return false;
}
/**
* kbase_gpu_complete_hw - complete the atom in a slot's JSn_HEAD
* @kbdev: kbase device
* @js: job slot to check
* @completion_code: completion code of the completed atom
* @job_tail: value read from JSn_TAIL, for STOPPED atoms
* @end_timestamp: pointer to approximate ktime value when the katom completed
*
* Among other operations, this also executes step 2 of a 2-step process of
* removing any related atoms from a slot's JSn_HEAD_NEXT (ringbuffer index 1),
* should there have been a 'failure' on an atom in JSn_HEAD (ringbuffer index
* 0). The first step is done in kbase_gpu_irq_evict().
*
* Note: 'STOPPED' atoms are considered 'failed', as they are in the HW, but
* unlike other failure codes we _can_ re-run them.
*
* When the JSn_HEAD atom is considered to be 'failed', then this will dequeue
* and return to the JS some (usually all) of the atoms evicted from the HW
* during the kbase_gpu_irq_evict() for that JSn_HEAD atom. If it dequeues an
* atom, that atom must not have been running or must already be evicted, as
* otherwise we would be in the incorrect state of having an atom both running
* on the HW and returned to the JS.
*/
void kbase_gpu_complete_hw(struct kbase_device *kbdev, int js,
u32 completion_code,
u64 job_tail,
ktime_t *end_timestamp)
{
struct kbase_jd_atom *katom = kbase_gpu_inspect(kbdev, js, 0);
struct kbase_context *kctx = katom->kctx;
dev_dbg(kbdev->dev,
"Atom %pK completed on hw with code 0x%x and job_tail 0x%llx (s:%d)\n",
(void *)katom, completion_code, job_tail, js);
lockdep_assert_held(&kbdev->hwaccess_lock);
/*
* When a hard-stop is followed close after a soft-stop, the completion
* code may be set to STOPPED, even though the job is terminated
*/
if (kbase_hw_has_issue(kbdev, BASE_HW_ISSUE_TMIX_8438)) {
if (completion_code == BASE_JD_EVENT_STOPPED &&
(katom->atom_flags &
KBASE_KATOM_FLAG_BEEN_HARD_STOPPED)) {
completion_code = BASE_JD_EVENT_TERMINATED;
}
}
if ((katom->core_req & BASE_JD_REQ_SKIP_CACHE_END) &&
completion_code != BASE_JD_EVENT_DONE &&
!(completion_code & BASE_JD_SW_EVENT)) {
/* When a job chain fails, on a T60x or when
* BASE_JD_REQ_SKIP_CACHE_END is set, the GPU cache is not
* flushed. To prevent future evictions causing possible memory
* corruption we need to flush the cache manually before any
* affected memory gets reused.
*/
katom->need_cache_flush_cores_retained = true;
}
katom = kbase_gpu_dequeue_atom(kbdev, js, end_timestamp);
if (completion_code == BASE_JD_EVENT_STOPPED) {
struct kbase_jd_atom *next_katom = kbase_gpu_inspect(kbdev, js,
0);
/*
* Dequeue next atom from ringbuffers on same slot if required.
* This atom will already have been removed from the NEXT
* registers by kbase_gpu_soft_hard_stop_slot(), to ensure that
* the atoms on this slot are returned in the correct order.
*/
if (next_katom &&
kbase_js_atom_runs_before(kbdev, katom, next_katom, 0u)) {
WARN_ON(next_katom->gpu_rb_state ==
KBASE_ATOM_GPU_RB_SUBMITTED);
kbase_gpu_dequeue_atom(kbdev, js, end_timestamp);
kbase_jm_return_atom_to_js(kbdev, next_katom);
}
} else if (completion_code != BASE_JD_EVENT_DONE) {
struct kbasep_js_device_data *js_devdata = &kbdev->js_data;
int i;
if (!kbase_ctx_flag(katom->kctx, KCTX_DYING)) {
meson_gpu_data_invalid_count++;
dev_warn(kbdev->dev, "error detected from slot %d, job status 0x%08x (%s)",
js, completion_code,
kbase_gpu_exception_name(
completion_code));
}
#if KBASE_KTRACE_DUMP_ON_JOB_SLOT_ERROR != 0
KBASE_KTRACE_DUMP(kbdev);
#endif
kbasep_js_clear_submit_allowed(js_devdata, katom->kctx);
/*
* Remove all atoms on the same context from ringbuffers. This
* will not remove atoms that are already on the GPU, as these
* are guaranteed not to have fail dependencies on the failed
* atom.
*/
for (i = 0; i < kbdev->gpu_props.num_job_slots; i++) {
struct kbase_jd_atom *katom_idx0 =
kbase_gpu_inspect(kbdev, i, 0);
struct kbase_jd_atom *katom_idx1 =
kbase_gpu_inspect(kbdev, i, 1);
if (katom_idx0 &&
kbase_rb_atom_might_depend(katom, katom_idx0) &&
katom_idx0->gpu_rb_state !=
KBASE_ATOM_GPU_RB_SUBMITTED) {
/* Dequeue katom_idx0 from ringbuffer */
kbase_gpu_dequeue_atom(kbdev, i, end_timestamp);
if (katom_idx1 && kbase_rb_atom_might_depend(
katom, katom_idx1) &&
katom_idx0->gpu_rb_state !=
KBASE_ATOM_GPU_RB_SUBMITTED) {
/* Dequeue katom_idx1 from ringbuffer */
kbase_gpu_dequeue_atom(kbdev, i,
end_timestamp);
katom_idx1->event_code =
BASE_JD_EVENT_STOPPED;
kbase_jm_return_atom_to_js(kbdev,
katom_idx1);
}
katom_idx0->event_code = BASE_JD_EVENT_STOPPED;
kbase_jm_return_atom_to_js(kbdev, katom_idx0);
} else if (katom_idx1 && kbase_rb_atom_might_depend(
katom, katom_idx1) &&
katom_idx1->gpu_rb_state !=
KBASE_ATOM_GPU_RB_SUBMITTED) {
/* Can not dequeue this atom yet - will be
* dequeued when atom at idx0 completes
*/
katom_idx1->event_code = BASE_JD_EVENT_STOPPED;
kbase_gpu_mark_atom_for_return(kbdev,
katom_idx1);
}
}
}
KBASE_KTRACE_ADD_JM_SLOT_INFO(kbdev, JM_JOB_DONE, kctx, katom, katom->jc, js, completion_code);
if (job_tail != 0 && job_tail != katom->jc) {
/* Some of the job has been executed */
dev_dbg(kbdev->dev,
"Update job chain address of atom %pK to resume from 0x%llx\n",
(void *)katom, job_tail);
katom->jc = job_tail;
KBASE_KTRACE_ADD_JM_SLOT(kbdev, JM_UPDATE_HEAD, katom->kctx,
katom, job_tail, js);
}
/* Only update the event code for jobs that weren't cancelled */
if (katom->event_code != BASE_JD_EVENT_JOB_CANCELLED)
katom->event_code = (enum base_jd_event_code)completion_code;
/* Complete the job, and start new ones
*
* Also defer remaining work onto the workqueue:
* - Re-queue Soft-stopped jobs
* - For any other jobs, queue the job back into the dependency system
* - Schedule out the parent context if necessary, and schedule a new
* one in.
*/
#if IS_ENABLED(CONFIG_GPU_TRACEPOINTS)
{
/* The atom in the HEAD */
struct kbase_jd_atom *next_katom = kbase_gpu_inspect(kbdev, js,
0);
if (next_katom && next_katom->gpu_rb_state ==
KBASE_ATOM_GPU_RB_SUBMITTED) {
char js_string[16];
trace_gpu_sched_switch(kbasep_make_job_slot_string(js,
js_string,
sizeof(js_string)),
ktime_to_ns(*end_timestamp),
(u32)next_katom->kctx->id, 0,
next_katom->work_id);
} else {
char js_string[16];
trace_gpu_sched_switch(kbasep_make_job_slot_string(js, js_string,
sizeof(js_string)),
ktime_to_ns(ktime_get_raw()), 0, 0, 0);
}
}
#endif
if (kbdev->serialize_jobs & KBASE_SERIALIZE_RESET)
kbase_reset_gpu_silent(kbdev);
if (completion_code == BASE_JD_EVENT_STOPPED)
katom = kbase_jm_return_atom_to_js(kbdev, katom);
else
katom = kbase_jm_complete(kbdev, katom, end_timestamp);
if (katom) {
dev_dbg(kbdev->dev,
"Cross-slot dependency %pK has become runnable.\n",
(void *)katom);
/* Check if there are lower priority jobs to soft stop */
kbase_job_slot_ctx_priority_check_locked(kctx, katom);
kbase_jm_try_kick(kbdev, 1 << katom->slot_nr);
}
/* For partial shader core off L2 cache flush */
kbase_pm_update_state(kbdev);
/* Job completion may have unblocked other atoms. Try to update all job
* slots
*/
kbase_backend_slot_update(kbdev);
}
void kbase_backend_reset(struct kbase_device *kbdev, ktime_t *end_timestamp)
{
int js;
lockdep_assert_held(&kbdev->hwaccess_lock);
/* Reset should always take the GPU out of protected mode */
WARN_ON(kbase_gpu_in_protected_mode(kbdev));
for (js = 0; js < kbdev->gpu_props.num_job_slots; js++) {
int atom_idx = 0;
int idx;
for (idx = 0; idx < SLOT_RB_SIZE; idx++) {
struct kbase_jd_atom *katom = kbase_gpu_inspect(kbdev,
js, atom_idx);
bool keep_in_jm_rb = false;
if (!katom)
break;
if (katom->protected_state.exit ==
KBASE_ATOM_EXIT_PROTECTED_RESET_WAIT) {
/* protected mode sanity checks */
WARN(kbase_jd_katom_is_protected(katom) !=
kbase_gpu_in_protected_mode(kbdev),
"Protected mode of atom (%d) doesn't match protected mode of GPU (%d)",
kbase_jd_katom_is_protected(katom),
kbase_gpu_in_protected_mode(kbdev));
WARN(!(kbase_jd_katom_is_protected(katom) && js == 0) &&
kbase_jd_katom_is_protected(katom),
"Protected atom on JS%d not supported", js);
}
if ((katom->gpu_rb_state < KBASE_ATOM_GPU_RB_SUBMITTED) &&
!kbase_ctx_flag(katom->kctx, KCTX_DYING))
keep_in_jm_rb = true;
kbase_gpu_release_atom(kbdev, katom, NULL);
/*
* If the atom wasn't on HW when the reset was issued
* then leave it in the RB and next time we're kicked
* it will be processed again from the starting state.
*/
if (keep_in_jm_rb) {
katom->protected_state.exit = KBASE_ATOM_EXIT_PROTECTED_CHECK;
/* As the atom was not removed, increment the
* index so that we read the correct atom in the
* next iteration.
*/
atom_idx++;
continue;
}
/*
* The atom was on the HW when the reset was issued
* all we can do is fail the atom.
*/
kbase_gpu_dequeue_atom(kbdev, js, NULL);
katom->event_code = BASE_JD_EVENT_JOB_CANCELLED;
kbase_jm_complete(kbdev, katom, end_timestamp);
}
/* Clear the slot's last katom submission kctx on reset */
kbdev->hwaccess.backend.slot_rb[js].last_kctx_tagged = SLOT_RB_NULL_TAG_VAL;
}
/* Re-enable GPU hardware counters if we're resetting from protected
* mode.
*/
kbdev->protected_mode_hwcnt_desired = true;
if (kbdev->protected_mode_hwcnt_disabled) {
kbase_hwcnt_context_enable(kbdev->hwcnt_gpu_ctx);
kbdev->protected_mode_hwcnt_disabled = false;
KBASE_TLSTREAM_AUX_PROTECTED_LEAVE_END(kbdev, kbdev);
}
kbdev->protected_mode_transition = false;
kbase_pm_protected_override_disable(kbdev);
}
/**
* should_stop_next_atom - given a soft/hard stop action, determine if the next
* atom on a slot should be stopped
* @kbdev: kbase devices
* @head_katom: atom currently in the JSn_HEAD
* @next_katom: atom currently in the JSn_HEAD_NEXT
* @action: JS_COMMAND_<...> action for soft/hard-stop
*
* This is used in cases where @head_katom is the target of the soft/hard-stop.
* It only makes sense to call this when @head_katom and @next_katom are from
* the same slot.
*
* Return: true if @next_katom should also be stopped with the given action,
* false otherwise
*/
static bool should_stop_next_atom(struct kbase_device *kbdev,
const struct kbase_jd_atom *head_katom,
const struct kbase_jd_atom *next_katom,
u32 action)
{
bool ret = false;
u32 hw_action = action & JS_COMMAND_MASK;
switch (hw_action) {
case JS_COMMAND_SOFT_STOP:
ret = kbase_js_atom_runs_before(kbdev, head_katom, next_katom,
0u);
break;
case JS_COMMAND_HARD_STOP:
/* Unlike soft-stop, a hard-stop targeting a particular atom
* should not cause atoms from unrelated contexts to be
* removed
*/
ret = (head_katom->kctx == next_katom->kctx);
break;
default:
/* Other stop actions are possible, but the driver should not
* be generating them at this point in the call chain
*/
WARN(1, "Unexpected stop action: 0x%.8x", hw_action);
break;
}
return ret;
}
static inline void kbase_gpu_stop_atom(struct kbase_device *kbdev,
int js,
struct kbase_jd_atom *katom,
u32 action)
{
struct kbase_context *kctx = katom->kctx;
u32 hw_action = action & JS_COMMAND_MASK;
kbase_job_check_enter_disjoint(kbdev, action, katom->core_req, katom);
kbasep_job_slot_soft_or_hard_stop_do_action(kbdev, js, hw_action,
katom->core_req, katom);
kbase_jsctx_slot_prio_blocked_set(kctx, js, katom->sched_priority);
}
static inline void kbase_gpu_remove_atom(struct kbase_device *kbdev,
struct kbase_jd_atom *katom,
u32 action,
bool disjoint)
{
struct kbase_context *kctx = katom->kctx;
lockdep_assert_held(&kbdev->hwaccess_lock);
katom->event_code = BASE_JD_EVENT_REMOVED_FROM_NEXT;
kbase_gpu_mark_atom_for_return(kbdev, katom);
kbase_jsctx_slot_prio_blocked_set(kctx, katom->slot_nr,
katom->sched_priority);
if (disjoint)
kbase_job_check_enter_disjoint(kbdev, action, katom->core_req,
katom);
}
static int should_stop_x_dep_slot(struct kbase_jd_atom *katom)
{
if (katom->x_post_dep) {
struct kbase_jd_atom *dep_atom = katom->x_post_dep;
if (dep_atom->gpu_rb_state !=
KBASE_ATOM_GPU_RB_NOT_IN_SLOT_RB &&
dep_atom->gpu_rb_state !=
KBASE_ATOM_GPU_RB_RETURN_TO_JS)
return dep_atom->slot_nr;
}
return -1;
}
bool kbase_backend_soft_hard_stop_slot(struct kbase_device *kbdev,
struct kbase_context *kctx,
int js,
struct kbase_jd_atom *katom,
u32 action)
{
struct kbase_jd_atom *katom_idx0;
struct kbase_context *kctx_idx0 = NULL;
struct kbase_jd_atom *katom_idx1;
struct kbase_context *kctx_idx1 = NULL;
bool katom_idx0_valid, katom_idx1_valid;
bool ret = false;
int stop_x_dep_idx0 = -1, stop_x_dep_idx1 = -1;
int prio_idx0 = 0, prio_idx1 = 0;
lockdep_assert_held(&kbdev->hwaccess_lock);
katom_idx0 = kbase_gpu_inspect(kbdev, js, 0);
katom_idx1 = kbase_gpu_inspect(kbdev, js, 1);
if (katom_idx0) {
kctx_idx0 = katom_idx0->kctx;
prio_idx0 = katom_idx0->sched_priority;
}
if (katom_idx1) {
kctx_idx1 = katom_idx1->kctx;
prio_idx1 = katom_idx1->sched_priority;
}
if (katom) {
katom_idx0_valid = (katom_idx0 == katom);
if (katom_idx1)
katom_idx1_valid = (katom_idx1 == katom);
else
katom_idx1_valid = false;
} else {
katom_idx0_valid = (katom_idx0 && (!kctx || kctx_idx0 == kctx));
katom_idx1_valid = (katom_idx1 && (!kctx || kctx_idx1 == kctx));
}
/* If there's an atom in JSn_HEAD_NEXT that we haven't already decided
* to stop, but we're stopping the JSn_HEAD atom, see if they are
* related/ordered in some way that would require the same stop action
*/
if (!katom_idx1_valid && katom_idx0_valid && katom_idx1)
katom_idx1_valid = should_stop_next_atom(kbdev, katom_idx0,
katom_idx1, action);
if (katom_idx0_valid)
stop_x_dep_idx0 = should_stop_x_dep_slot(katom_idx0);
if (katom_idx1_valid)
stop_x_dep_idx1 = should_stop_x_dep_slot(katom_idx1);
if (katom_idx0_valid) {
if (katom_idx0->gpu_rb_state != KBASE_ATOM_GPU_RB_SUBMITTED) {
/* Simple case - just dequeue and return */
kbase_gpu_dequeue_atom(kbdev, js, NULL);
if (katom_idx1_valid) {
kbase_gpu_dequeue_atom(kbdev, js, NULL);
katom_idx1->event_code =
BASE_JD_EVENT_REMOVED_FROM_NEXT;
kbase_jm_return_atom_to_js(kbdev, katom_idx1);
kbase_jsctx_slot_prio_blocked_set(kctx_idx1, js,
prio_idx1);
}
katom_idx0->event_code =
BASE_JD_EVENT_REMOVED_FROM_NEXT;
kbase_jm_return_atom_to_js(kbdev, katom_idx0);
kbase_jsctx_slot_prio_blocked_set(kctx_idx0, js,
prio_idx0);
} else {
/* katom_idx0 is on GPU */
if (katom_idx1_valid && katom_idx1->gpu_rb_state ==
KBASE_ATOM_GPU_RB_SUBMITTED) {
/* katom_idx0 and katom_idx1 are on GPU */
if (kbase_reg_read(kbdev, JOB_SLOT_REG(js,
JS_COMMAND_NEXT)) == 0) {
/* idx0 has already completed - stop
* idx1 if needed
*/
if (katom_idx1_valid) {
kbase_gpu_stop_atom(kbdev, js,
katom_idx1,
action);
ret = true;
}
} else {
/* idx1 is in NEXT registers - attempt
* to remove
*/
kbase_reg_write(kbdev,
JOB_SLOT_REG(js,
JS_COMMAND_NEXT),
JS_COMMAND_NOP);
if (kbase_reg_read(kbdev,
JOB_SLOT_REG(js,
JS_HEAD_NEXT_LO))
!= 0 ||
kbase_reg_read(kbdev,
JOB_SLOT_REG(js,
JS_HEAD_NEXT_HI))
!= 0) {
/* idx1 removed successfully,
* will be handled in IRQ
*/
kbase_gpu_remove_atom(kbdev,
katom_idx1,
action, true);
/* Revert the last_context. */
kbdev->hwaccess.backend.slot_rb[js]
.last_kctx_tagged =
SLOT_RB_TAG_KCTX(katom_idx0->kctx);
stop_x_dep_idx1 =
should_stop_x_dep_slot(katom_idx1);
/* stop idx0 if still on GPU */
kbase_gpu_stop_atom(kbdev, js,
katom_idx0,
action);
ret = true;
} else if (katom_idx1_valid) {
/* idx0 has already completed,
* stop idx1 if needed
*/
kbase_gpu_stop_atom(kbdev, js,
katom_idx1,
action);
ret = true;
}
}
} else if (katom_idx1_valid) {
/* idx1 not on GPU but must be dequeued*/
/* idx1 will be handled in IRQ */
kbase_gpu_remove_atom(kbdev, katom_idx1, action,
false);
/* stop idx0 */
/* This will be repeated for anything removed
* from the next registers, since their normal
* flow was also interrupted, and this function
* might not enter disjoint state e.g. if we
* don't actually do a hard stop on the head
* atom
*/
kbase_gpu_stop_atom(kbdev, js, katom_idx0,
action);
ret = true;
} else {
/* no atom in idx1 */
/* just stop idx0 */
kbase_gpu_stop_atom(kbdev, js, katom_idx0,
action);
ret = true;
}
}
} else if (katom_idx1_valid) {
if (katom_idx1->gpu_rb_state != KBASE_ATOM_GPU_RB_SUBMITTED) {
/* Mark for return */
/* idx1 will be returned once idx0 completes */
kbase_gpu_remove_atom(kbdev, katom_idx1, action,
false);
} else {
/* idx1 is on GPU */
if (kbase_reg_read(kbdev, JOB_SLOT_REG(js,
JS_COMMAND_NEXT)) == 0) {
/* idx0 has already completed - stop idx1 */
kbase_gpu_stop_atom(kbdev, js, katom_idx1,
action);
ret = true;
} else {
/* idx1 is in NEXT registers - attempt to
* remove
*/
kbase_reg_write(kbdev, JOB_SLOT_REG(js,
JS_COMMAND_NEXT),
JS_COMMAND_NOP);
if (kbase_reg_read(kbdev, JOB_SLOT_REG(js,
JS_HEAD_NEXT_LO)) != 0 ||
kbase_reg_read(kbdev, JOB_SLOT_REG(js,
JS_HEAD_NEXT_HI)) != 0) {
/* idx1 removed successfully, will be
* handled in IRQ once idx0 completes
*/
kbase_gpu_remove_atom(kbdev, katom_idx1,
action,
false);
/* Revert the last_context, or mark as purged */
kbdev->hwaccess.backend.slot_rb[js].last_kctx_tagged =
kctx_idx0 ? SLOT_RB_TAG_KCTX(katom_idx0->kctx) :
SLOT_RB_TAG_PURGED;
} else {
/* idx0 has already completed - stop
* idx1
*/
kbase_gpu_stop_atom(kbdev, js,
katom_idx1,
action);
ret = true;
}
}
}
}
if (stop_x_dep_idx0 != -1)
kbase_backend_soft_hard_stop_slot(kbdev, kctx, stop_x_dep_idx0,
NULL, action);
if (stop_x_dep_idx1 != -1)
kbase_backend_soft_hard_stop_slot(kbdev, kctx, stop_x_dep_idx1,
NULL, action);
return ret;
}
void kbase_backend_cache_clean(struct kbase_device *kbdev,
struct kbase_jd_atom *katom)
{
if (katom->need_cache_flush_cores_retained) {
kbase_gpu_start_cache_clean(kbdev,
GPU_COMMAND_CACHE_CLN_INV_FULL);
kbase_gpu_wait_cache_clean(kbdev);
katom->need_cache_flush_cores_retained = false;
}
}
void kbase_backend_complete_wq(struct kbase_device *kbdev,
struct kbase_jd_atom *katom)
{
/*
* If cache flush required due to HW workaround then perform the flush
* now
*/
kbase_backend_cache_clean(kbdev, katom);
}
void kbase_backend_complete_wq_post_sched(struct kbase_device *kbdev,
base_jd_core_req core_req)
{
if (!kbdev->pm.active_count) {
kbase_pm_lock(kbdev);
kbase_pm_update_active(kbdev);
kbase_pm_unlock(kbdev);
}
}
void kbase_gpu_dump_slots(struct kbase_device *kbdev)
{
unsigned long flags;
int js;
spin_lock_irqsave(&kbdev->hwaccess_lock, flags);
dev_info(kbdev->dev, "%s:\n", __func__);
for (js = 0; js < kbdev->gpu_props.num_job_slots; js++) {
int idx;
for (idx = 0; idx < SLOT_RB_SIZE; idx++) {
struct kbase_jd_atom *katom = kbase_gpu_inspect(kbdev,
js,
idx);
if (katom)
dev_info(kbdev->dev,
" js%d idx%d : katom=%pK gpu_rb_state=%d\n",
js, idx, katom, katom->gpu_rb_state);
else
dev_info(kbdev->dev, " js%d idx%d : empty\n",
js, idx);
}
}
spin_unlock_irqrestore(&kbdev->hwaccess_lock, flags);
}
void kbase_backend_slot_kctx_purge_locked(struct kbase_device *kbdev, struct kbase_context *kctx)
{
int js;
bool tracked = false;
lockdep_assert_held(&kbdev->hwaccess_lock);
for (js = 0; js < kbdev->gpu_props.num_job_slots; js++) {
u64 tagged_kctx = kbdev->hwaccess.backend.slot_rb[js].last_kctx_tagged;
if (tagged_kctx == SLOT_RB_TAG_KCTX(kctx)) {
/* Marking the slot kctx tracking field is purged */
kbdev->hwaccess.backend.slot_rb[js].last_kctx_tagged = SLOT_RB_TAG_PURGED;
tracked = true;
}
}
if (tracked) {
/* The context had run some jobs before the purge, other slots
* in SLOT_RB_NULL_TAG_VAL condition needs to be marked as
* purged as well.
*/
for (js = 0; js < kbdev->gpu_props.num_job_slots; js++) {
if (kbdev->hwaccess.backend.slot_rb[js].last_kctx_tagged ==
SLOT_RB_NULL_TAG_VAL)
kbdev->hwaccess.backend.slot_rb[js].last_kctx_tagged =
SLOT_RB_TAG_PURGED;
}
}
}