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|
// SPDX-License-Identifier: MIT
/*
* Copyright © 2016-2019 Intel Corporation
*/
#include "gt/intel_gt.h"
#include "gt/intel_reset.h"
#include "intel_guc.h"
#include "intel_guc_ads.h"
#include "intel_guc_submission.h"
#include "intel_uc.h"
#include "i915_drv.h"
static const struct intel_uc_ops uc_ops_off;
static const struct intel_uc_ops uc_ops_on;
/* Reset GuC providing us with fresh state for both GuC and HuC.
*/
static int __intel_uc_reset_hw(struct intel_uc *uc)
{
struct intel_gt *gt = uc_to_gt(uc);
int ret;
u32 guc_status;
ret = i915_inject_probe_error(gt->i915, -ENXIO);
if (ret)
return ret;
ret = intel_reset_guc(gt);
if (ret) {
DRM_ERROR("Failed to reset GuC, ret = %d\n", ret);
return ret;
}
guc_status = intel_uncore_read(gt->uncore, GUC_STATUS);
WARN(!(guc_status & GS_MIA_IN_RESET),
"GuC status: 0x%x, MIA core expected to be in reset\n",
guc_status);
return ret;
}
static void __confirm_options(struct intel_uc *uc)
{
struct drm_i915_private *i915 = uc_to_gt(uc)->i915;
drm_dbg(&i915->drm,
"enable_guc=%d (guc:%s submission:%s huc:%s)\n",
i915->params.enable_guc,
yesno(intel_uc_wants_guc(uc)),
yesno(intel_uc_wants_guc_submission(uc)),
yesno(intel_uc_wants_huc(uc)));
if (i915->params.enable_guc == -1)
return;
if (i915->params.enable_guc == 0) {
GEM_BUG_ON(intel_uc_wants_guc(uc));
GEM_BUG_ON(intel_uc_wants_guc_submission(uc));
GEM_BUG_ON(intel_uc_wants_huc(uc));
return;
}
if (!intel_uc_supports_guc(uc))
drm_info(&i915->drm,
"Incompatible option enable_guc=%d - %s\n",
i915->params.enable_guc, "GuC is not supported!");
if (i915->params.enable_guc & ENABLE_GUC_LOAD_HUC &&
!intel_uc_supports_huc(uc))
drm_info(&i915->drm,
"Incompatible option enable_guc=%d - %s\n",
i915->params.enable_guc, "HuC is not supported!");
if (i915->params.enable_guc & ENABLE_GUC_SUBMISSION &&
!intel_uc_supports_guc_submission(uc))
drm_info(&i915->drm,
"Incompatible option enable_guc=%d - %s\n",
i915->params.enable_guc, "GuC submission is N/A");
if (i915->params.enable_guc & ~(ENABLE_GUC_SUBMISSION |
ENABLE_GUC_LOAD_HUC))
drm_info(&i915->drm,
"Incompatible option enable_guc=%d - %s\n",
i915->params.enable_guc, "undocumented flag");
}
void intel_uc_init_early(struct intel_uc *uc)
{
intel_guc_init_early(&uc->guc);
intel_huc_init_early(&uc->huc);
__confirm_options(uc);
if (intel_uc_wants_guc(uc))
uc->ops = &uc_ops_on;
else
uc->ops = &uc_ops_off;
}
void intel_uc_driver_late_release(struct intel_uc *uc)
{
}
/**
* intel_uc_init_mmio - setup uC MMIO access
* @uc: the intel_uc structure
*
* Setup minimal state necessary for MMIO accesses later in the
* initialization sequence.
*/
void intel_uc_init_mmio(struct intel_uc *uc)
{
intel_guc_init_send_regs(&uc->guc);
}
static void __uc_capture_load_err_log(struct intel_uc *uc)
{
struct intel_guc *guc = &uc->guc;
if (guc->log.vma && !uc->load_err_log)
uc->load_err_log = i915_gem_object_get(guc->log.vma->obj);
}
static void __uc_free_load_err_log(struct intel_uc *uc)
{
struct drm_i915_gem_object *log = fetch_and_zero(&uc->load_err_log);
if (log)
i915_gem_object_put(log);
}
void intel_uc_driver_remove(struct intel_uc *uc)
{
intel_uc_fini_hw(uc);
intel_uc_fini(uc);
__uc_free_load_err_log(uc);
}
static inline bool guc_communication_enabled(struct intel_guc *guc)
{
return intel_guc_ct_enabled(&guc->ct);
}
/*
* Events triggered while CT buffers are disabled are logged in the SCRATCH_15
* register using the same bits used in the CT message payload. Since our
* communication channel with guc is turned off at this point, we can save the
* message and handle it after we turn it back on.
*/
static void guc_clear_mmio_msg(struct intel_guc *guc)
{
intel_uncore_write(guc_to_gt(guc)->uncore, SOFT_SCRATCH(15), 0);
}
static void guc_get_mmio_msg(struct intel_guc *guc)
{
u32 val;
spin_lock_irq(&guc->irq_lock);
val = intel_uncore_read(guc_to_gt(guc)->uncore, SOFT_SCRATCH(15));
guc->mmio_msg |= val & guc->msg_enabled_mask;
/*
* clear all events, including the ones we're not currently servicing,
* to make sure we don't try to process a stale message if we enable
* handling of more events later.
*/
guc_clear_mmio_msg(guc);
spin_unlock_irq(&guc->irq_lock);
}
static void guc_handle_mmio_msg(struct intel_guc *guc)
{
struct drm_i915_private *i915 = guc_to_gt(guc)->i915;
/* we need communication to be enabled to reply to GuC */
GEM_BUG_ON(!guc_communication_enabled(guc));
if (!guc->mmio_msg)
return;
spin_lock_irq(&i915->irq_lock);
intel_guc_to_host_process_recv_msg(guc, &guc->mmio_msg, 1);
spin_unlock_irq(&i915->irq_lock);
guc->mmio_msg = 0;
}
static void guc_reset_interrupts(struct intel_guc *guc)
{
guc->interrupts.reset(guc);
}
static void guc_enable_interrupts(struct intel_guc *guc)
{
guc->interrupts.enable(guc);
}
static void guc_disable_interrupts(struct intel_guc *guc)
{
guc->interrupts.disable(guc);
}
static int guc_enable_communication(struct intel_guc *guc)
{
struct drm_i915_private *i915 = guc_to_gt(guc)->i915;
int ret;
GEM_BUG_ON(guc_communication_enabled(guc));
ret = i915_inject_probe_error(i915, -ENXIO);
if (ret)
return ret;
ret = intel_guc_ct_enable(&guc->ct);
if (ret)
return ret;
/* check for mmio messages received before/during the CT enable */
guc_get_mmio_msg(guc);
guc_handle_mmio_msg(guc);
guc_enable_interrupts(guc);
/* check for CT messages received before we enabled interrupts */
spin_lock_irq(&i915->irq_lock);
intel_guc_ct_event_handler(&guc->ct);
spin_unlock_irq(&i915->irq_lock);
DRM_INFO("GuC communication enabled\n");
return 0;
}
static void guc_disable_communication(struct intel_guc *guc)
{
/*
* Events generated during or after CT disable are logged by guc in
* via mmio. Make sure the register is clear before disabling CT since
* all events we cared about have already been processed via CT.
*/
guc_clear_mmio_msg(guc);
guc_disable_interrupts(guc);
intel_guc_ct_disable(&guc->ct);
/*
* Check for messages received during/after the CT disable. We do not
* expect any messages to have arrived via CT between the interrupt
* disable and the CT disable because GuC should've been idle until we
* triggered the CT disable protocol.
*/
guc_get_mmio_msg(guc);
DRM_INFO("GuC communication disabled\n");
}
static void __uc_fetch_firmwares(struct intel_uc *uc)
{
int err;
GEM_BUG_ON(!intel_uc_wants_guc(uc));
err = intel_uc_fw_fetch(&uc->guc.fw);
if (err)
return;
if (intel_uc_wants_huc(uc))
intel_uc_fw_fetch(&uc->huc.fw);
}
static void __uc_cleanup_firmwares(struct intel_uc *uc)
{
intel_uc_fw_cleanup_fetch(&uc->huc.fw);
intel_uc_fw_cleanup_fetch(&uc->guc.fw);
}
static int __uc_init(struct intel_uc *uc)
{
struct intel_guc *guc = &uc->guc;
struct intel_huc *huc = &uc->huc;
int ret;
GEM_BUG_ON(!intel_uc_wants_guc(uc));
if (!intel_uc_uses_guc(uc))
return 0;
if (i915_inject_probe_failure(uc_to_gt(uc)->i915))
return -ENOMEM;
/* XXX: GuC submission is unavailable for now */
GEM_BUG_ON(intel_uc_uses_guc_submission(uc));
ret = intel_guc_init(guc);
if (ret)
return ret;
if (intel_uc_uses_huc(uc)) {
ret = intel_huc_init(huc);
if (ret)
goto out_guc;
}
return 0;
out_guc:
intel_guc_fini(guc);
return ret;
}
static void __uc_fini(struct intel_uc *uc)
{
intel_huc_fini(&uc->huc);
intel_guc_fini(&uc->guc);
}
static int __uc_sanitize(struct intel_uc *uc)
{
struct intel_guc *guc = &uc->guc;
struct intel_huc *huc = &uc->huc;
GEM_BUG_ON(!intel_uc_supports_guc(uc));
intel_huc_sanitize(huc);
intel_guc_sanitize(guc);
return __intel_uc_reset_hw(uc);
}
/* Initialize and verify the uC regs related to uC positioning in WOPCM */
static int uc_init_wopcm(struct intel_uc *uc)
{
struct intel_gt *gt = uc_to_gt(uc);
struct intel_uncore *uncore = gt->uncore;
u32 base = intel_wopcm_guc_base(>->i915->wopcm);
u32 size = intel_wopcm_guc_size(>->i915->wopcm);
u32 huc_agent = intel_uc_uses_huc(uc) ? HUC_LOADING_AGENT_GUC : 0;
u32 mask;
int err;
if (unlikely(!base || !size)) {
i915_probe_error(gt->i915, "Unsuccessful WOPCM partitioning\n");
return -E2BIG;
}
GEM_BUG_ON(!intel_uc_supports_guc(uc));
GEM_BUG_ON(!(base & GUC_WOPCM_OFFSET_MASK));
GEM_BUG_ON(base & ~GUC_WOPCM_OFFSET_MASK);
GEM_BUG_ON(!(size & GUC_WOPCM_SIZE_MASK));
GEM_BUG_ON(size & ~GUC_WOPCM_SIZE_MASK);
err = i915_inject_probe_error(gt->i915, -ENXIO);
if (err)
return err;
mask = GUC_WOPCM_SIZE_MASK | GUC_WOPCM_SIZE_LOCKED;
err = intel_uncore_write_and_verify(uncore, GUC_WOPCM_SIZE, size, mask,
size | GUC_WOPCM_SIZE_LOCKED);
if (err)
goto err_out;
mask = GUC_WOPCM_OFFSET_MASK | GUC_WOPCM_OFFSET_VALID | huc_agent;
err = intel_uncore_write_and_verify(uncore, DMA_GUC_WOPCM_OFFSET,
base | huc_agent, mask,
base | huc_agent |
GUC_WOPCM_OFFSET_VALID);
if (err)
goto err_out;
return 0;
err_out:
i915_probe_error(gt->i915, "Failed to init uC WOPCM registers!\n");
i915_probe_error(gt->i915, "%s(%#x)=%#x\n", "DMA_GUC_WOPCM_OFFSET",
i915_mmio_reg_offset(DMA_GUC_WOPCM_OFFSET),
intel_uncore_read(uncore, DMA_GUC_WOPCM_OFFSET));
i915_probe_error(gt->i915, "%s(%#x)=%#x\n", "GUC_WOPCM_SIZE",
i915_mmio_reg_offset(GUC_WOPCM_SIZE),
intel_uncore_read(uncore, GUC_WOPCM_SIZE));
return err;
}
static bool uc_is_wopcm_locked(struct intel_uc *uc)
{
struct intel_gt *gt = uc_to_gt(uc);
struct intel_uncore *uncore = gt->uncore;
return (intel_uncore_read(uncore, GUC_WOPCM_SIZE) & GUC_WOPCM_SIZE_LOCKED) ||
(intel_uncore_read(uncore, DMA_GUC_WOPCM_OFFSET) & GUC_WOPCM_OFFSET_VALID);
}
static int __uc_check_hw(struct intel_uc *uc)
{
if (!intel_uc_supports_guc(uc))
return 0;
/*
* We can silently continue without GuC only if it was never enabled
* before on this system after reboot, otherwise we risk GPU hangs.
* To check if GuC was loaded before we look at WOPCM registers.
*/
if (uc_is_wopcm_locked(uc))
return -EIO;
return 0;
}
static int __uc_init_hw(struct intel_uc *uc)
{
struct drm_i915_private *i915 = uc_to_gt(uc)->i915;
struct intel_guc *guc = &uc->guc;
struct intel_huc *huc = &uc->huc;
int ret, attempts;
GEM_BUG_ON(!intel_uc_supports_guc(uc));
GEM_BUG_ON(!intel_uc_wants_guc(uc));
if (!intel_uc_fw_is_loadable(&guc->fw)) {
ret = __uc_check_hw(uc) ||
intel_uc_fw_is_overridden(&guc->fw) ||
intel_uc_wants_guc_submission(uc) ?
intel_uc_fw_status_to_error(guc->fw.status) : 0;
goto err_out;
}
ret = uc_init_wopcm(uc);
if (ret)
goto err_out;
guc_reset_interrupts(guc);
/* WaEnableuKernelHeaderValidFix:skl */
/* WaEnableGuCBootHashCheckNotSet:skl,bxt,kbl */
if (IS_GEN(i915, 9))
attempts = 3;
else
attempts = 1;
while (attempts--) {
/*
* Always reset the GuC just before (re)loading, so
* that the state and timing are fairly predictable
*/
ret = __uc_sanitize(uc);
if (ret)
goto err_out;
intel_huc_fw_upload(huc);
intel_guc_ads_reset(guc);
intel_guc_write_params(guc);
ret = intel_guc_fw_upload(guc);
if (ret == 0)
break;
DRM_DEBUG_DRIVER("GuC fw load failed: %d; will reset and "
"retry %d more time(s)\n", ret, attempts);
}
/* Did we succeded or run out of retries? */
if (ret)
goto err_log_capture;
ret = guc_enable_communication(guc);
if (ret)
goto err_log_capture;
intel_huc_auth(huc);
ret = intel_guc_sample_forcewake(guc);
if (ret)
goto err_communication;
if (intel_uc_uses_guc_submission(uc))
intel_guc_submission_enable(guc);
drm_info(&i915->drm, "%s firmware %s version %u.%u %s:%s\n",
intel_uc_fw_type_repr(INTEL_UC_FW_TYPE_GUC), guc->fw.path,
guc->fw.major_ver_found, guc->fw.minor_ver_found,
"submission",
enableddisabled(intel_uc_uses_guc_submission(uc)));
if (intel_uc_uses_huc(uc)) {
drm_info(&i915->drm, "%s firmware %s version %u.%u %s:%s\n",
intel_uc_fw_type_repr(INTEL_UC_FW_TYPE_HUC),
huc->fw.path,
huc->fw.major_ver_found, huc->fw.minor_ver_found,
"authenticated",
yesno(intel_huc_is_authenticated(huc)));
}
return 0;
/*
* We've failed to load the firmware :(
*/
err_communication:
guc_disable_communication(guc);
err_log_capture:
__uc_capture_load_err_log(uc);
err_out:
__uc_sanitize(uc);
if (!ret) {
drm_notice(&i915->drm, "GuC is uninitialized\n");
/* We want to run without GuC submission */
return 0;
}
i915_probe_error(i915, "GuC initialization failed %d\n", ret);
/* We want to keep KMS alive */
return -EIO;
}
static void __uc_fini_hw(struct intel_uc *uc)
{
struct intel_guc *guc = &uc->guc;
if (!intel_guc_is_fw_running(guc))
return;
if (intel_uc_uses_guc_submission(uc))
intel_guc_submission_disable(guc);
if (guc_communication_enabled(guc))
guc_disable_communication(guc);
__uc_sanitize(uc);
}
/**
* intel_uc_reset_prepare - Prepare for reset
* @uc: the intel_uc structure
*
* Preparing for full gpu reset.
*/
void intel_uc_reset_prepare(struct intel_uc *uc)
{
struct intel_guc *guc = &uc->guc;
if (!intel_guc_is_ready(guc))
return;
guc_disable_communication(guc);
__uc_sanitize(uc);
}
void intel_uc_runtime_suspend(struct intel_uc *uc)
{
struct intel_guc *guc = &uc->guc;
int err;
if (!intel_guc_is_ready(guc))
return;
err = intel_guc_suspend(guc);
if (err)
DRM_DEBUG_DRIVER("Failed to suspend GuC, err=%d", err);
guc_disable_communication(guc);
}
void intel_uc_suspend(struct intel_uc *uc)
{
struct intel_guc *guc = &uc->guc;
intel_wakeref_t wakeref;
if (!intel_guc_is_ready(guc))
return;
with_intel_runtime_pm(uc_to_gt(uc)->uncore->rpm, wakeref)
intel_uc_runtime_suspend(uc);
}
static int __uc_resume(struct intel_uc *uc, bool enable_communication)
{
struct intel_guc *guc = &uc->guc;
int err;
if (!intel_guc_is_fw_running(guc))
return 0;
/* Make sure we enable communication if and only if it's disabled */
GEM_BUG_ON(enable_communication == guc_communication_enabled(guc));
if (enable_communication)
guc_enable_communication(guc);
err = intel_guc_resume(guc);
if (err) {
DRM_DEBUG_DRIVER("Failed to resume GuC, err=%d", err);
return err;
}
return 0;
}
int intel_uc_resume(struct intel_uc *uc)
{
/*
* When coming out of S3/S4 we sanitize and re-init the HW, so
* communication is already re-enabled at this point.
*/
return __uc_resume(uc, false);
}
int intel_uc_runtime_resume(struct intel_uc *uc)
{
/*
* During runtime resume we don't sanitize, so we need to re-init
* communication as well.
*/
return __uc_resume(uc, true);
}
static const struct intel_uc_ops uc_ops_off = {
.init_hw = __uc_check_hw,
};
static const struct intel_uc_ops uc_ops_on = {
.sanitize = __uc_sanitize,
.init_fw = __uc_fetch_firmwares,
.fini_fw = __uc_cleanup_firmwares,
.init = __uc_init,
.fini = __uc_fini,
.init_hw = __uc_init_hw,
.fini_hw = __uc_fini_hw,
};
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