blob: 1c09acfb4028d228ab806d2c4b81d239cff20d33 [file] [log] [blame]
/*
* Copyright (C) 2013 Red Hat
* Author: Rob Clark <robdclark@gmail.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include "msm_gpu.h"
#include "msm_gem.h"
#include "msm_mmu.h"
#include "msm_fence.h"
#include <linux/string_helpers.h>
#include <linux/pm_opp.h>
#include <linux/devfreq.h>
/*
* Power Management:
*/
static int msm_devfreq_target(struct device *dev, unsigned long *freq,
u32 flags)
{
struct msm_gpu *gpu = platform_get_drvdata(to_platform_device(dev));
struct dev_pm_opp *opp;
opp = devfreq_recommended_opp(dev, freq, flags);
if (IS_ERR(opp))
return PTR_ERR(opp);
clk_set_rate(gpu->core_clk, *freq);
dev_pm_opp_put(opp);
return 0;
}
static int msm_devfreq_get_dev_status(struct device *dev,
struct devfreq_dev_status *status)
{
struct msm_gpu *gpu = platform_get_drvdata(to_platform_device(dev));
u64 cycles;
u32 freq = ((u32) status->current_frequency) / 1000000;
ktime_t time;
status->current_frequency = (unsigned long) clk_get_rate(gpu->core_clk);
gpu->funcs->gpu_busy(gpu, &cycles);
status->busy_time = ((u32) (cycles - gpu->devfreq.busy_cycles)) / freq;
gpu->devfreq.busy_cycles = cycles;
time = ktime_get();
status->total_time = ktime_us_delta(time, gpu->devfreq.time);
gpu->devfreq.time = time;
return 0;
}
static int msm_devfreq_get_cur_freq(struct device *dev, unsigned long *freq)
{
struct msm_gpu *gpu = platform_get_drvdata(to_platform_device(dev));
*freq = (unsigned long) clk_get_rate(gpu->core_clk);
return 0;
}
static struct devfreq_dev_profile msm_devfreq_profile = {
.polling_ms = 10,
.target = msm_devfreq_target,
.get_dev_status = msm_devfreq_get_dev_status,
.get_cur_freq = msm_devfreq_get_cur_freq,
};
static void msm_devfreq_init(struct msm_gpu *gpu)
{
/* We need target support to do devfreq */
if (!gpu->funcs->gpu_busy)
return;
msm_devfreq_profile.initial_freq = gpu->fast_rate;
/*
* Don't set the freq_table or max_state and let devfreq build the table
* from OPP
*/
gpu->devfreq.devfreq = devm_devfreq_add_device(&gpu->pdev->dev,
&msm_devfreq_profile, "simple_ondemand", NULL);
if (IS_ERR(gpu->devfreq.devfreq)) {
dev_err(&gpu->pdev->dev, "Couldn't initialize GPU devfreq\n");
gpu->devfreq.devfreq = NULL;
}
}
static int enable_pwrrail(struct msm_gpu *gpu)
{
struct drm_device *dev = gpu->dev;
int ret = 0;
if (gpu->gpu_reg) {
ret = regulator_enable(gpu->gpu_reg);
if (ret) {
dev_err(dev->dev, "failed to enable 'gpu_reg': %d\n", ret);
return ret;
}
}
if (gpu->gpu_cx) {
ret = regulator_enable(gpu->gpu_cx);
if (ret) {
dev_err(dev->dev, "failed to enable 'gpu_cx': %d\n", ret);
return ret;
}
}
return 0;
}
static int disable_pwrrail(struct msm_gpu *gpu)
{
if (gpu->gpu_cx)
regulator_disable(gpu->gpu_cx);
if (gpu->gpu_reg)
regulator_disable(gpu->gpu_reg);
return 0;
}
static int enable_clk(struct msm_gpu *gpu)
{
int i;
if (gpu->core_clk && gpu->fast_rate)
clk_set_rate(gpu->core_clk, gpu->fast_rate);
/* Set the RBBM timer rate to 19.2Mhz */
if (gpu->rbbmtimer_clk)
clk_set_rate(gpu->rbbmtimer_clk, 19200000);
for (i = gpu->nr_clocks - 1; i >= 0; i--)
if (gpu->grp_clks[i])
clk_prepare(gpu->grp_clks[i]);
for (i = gpu->nr_clocks - 1; i >= 0; i--)
if (gpu->grp_clks[i])
clk_enable(gpu->grp_clks[i]);
return 0;
}
static int disable_clk(struct msm_gpu *gpu)
{
int i;
for (i = gpu->nr_clocks - 1; i >= 0; i--)
if (gpu->grp_clks[i])
clk_disable(gpu->grp_clks[i]);
for (i = gpu->nr_clocks - 1; i >= 0; i--)
if (gpu->grp_clks[i])
clk_unprepare(gpu->grp_clks[i]);
/*
* Set the clock to a deliberately low rate. On older targets the clock
* speed had to be non zero to avoid problems. On newer targets this
* will be rounded down to zero anyway so it all works out.
*/
if (gpu->core_clk)
clk_set_rate(gpu->core_clk, 27000000);
if (gpu->rbbmtimer_clk)
clk_set_rate(gpu->rbbmtimer_clk, 0);
return 0;
}
static int enable_axi(struct msm_gpu *gpu)
{
if (gpu->ebi1_clk)
clk_prepare_enable(gpu->ebi1_clk);
return 0;
}
static int disable_axi(struct msm_gpu *gpu)
{
if (gpu->ebi1_clk)
clk_disable_unprepare(gpu->ebi1_clk);
return 0;
}
int msm_gpu_pm_resume(struct msm_gpu *gpu)
{
int ret;
DBG("%s", gpu->name);
ret = enable_pwrrail(gpu);
if (ret)
return ret;
ret = enable_clk(gpu);
if (ret)
return ret;
ret = enable_axi(gpu);
if (ret)
return ret;
if (gpu->devfreq.devfreq) {
gpu->devfreq.busy_cycles = 0;
gpu->devfreq.time = ktime_get();
devfreq_resume_device(gpu->devfreq.devfreq);
}
gpu->needs_hw_init = true;
return 0;
}
int msm_gpu_pm_suspend(struct msm_gpu *gpu)
{
int ret;
DBG("%s", gpu->name);
if (gpu->devfreq.devfreq)
devfreq_suspend_device(gpu->devfreq.devfreq);
ret = disable_axi(gpu);
if (ret)
return ret;
ret = disable_clk(gpu);
if (ret)
return ret;
ret = disable_pwrrail(gpu);
if (ret)
return ret;
return 0;
}
int msm_gpu_hw_init(struct msm_gpu *gpu)
{
int ret;
WARN_ON(!mutex_is_locked(&gpu->dev->struct_mutex));
if (!gpu->needs_hw_init)
return 0;
disable_irq(gpu->irq);
ret = gpu->funcs->hw_init(gpu);
if (!ret)
gpu->needs_hw_init = false;
enable_irq(gpu->irq);
return ret;
}
/*
* Hangcheck detection for locked gpu:
*/
static void update_fences(struct msm_gpu *gpu, struct msm_ringbuffer *ring,
uint32_t fence)
{
struct msm_gem_submit *submit;
list_for_each_entry(submit, &ring->submits, node) {
if (submit->seqno > fence)
break;
msm_update_fence(submit->ring->fctx,
submit->fence->seqno);
}
}
static struct msm_gem_submit *
find_submit(struct msm_ringbuffer *ring, uint32_t fence)
{
struct msm_gem_submit *submit;
WARN_ON(!mutex_is_locked(&ring->gpu->dev->struct_mutex));
list_for_each_entry(submit, &ring->submits, node)
if (submit->seqno == fence)
return submit;
return NULL;
}
static void retire_submits(struct msm_gpu *gpu);
static void recover_worker(struct work_struct *work)
{
struct msm_gpu *gpu = container_of(work, struct msm_gpu, recover_work);
struct drm_device *dev = gpu->dev;
struct msm_drm_private *priv = dev->dev_private;
struct msm_gem_submit *submit;
struct msm_ringbuffer *cur_ring = gpu->funcs->active_ring(gpu);
int i;
mutex_lock(&dev->struct_mutex);
dev_err(dev->dev, "%s: hangcheck recover!\n", gpu->name);
submit = find_submit(cur_ring, cur_ring->memptrs->fence + 1);
if (submit) {
struct task_struct *task;
rcu_read_lock();
task = pid_task(submit->pid, PIDTYPE_PID);
if (task) {
char *cmd;
/*
* So slightly annoying, in other paths like
* mmap'ing gem buffers, mmap_sem is acquired
* before struct_mutex, which means we can't
* hold struct_mutex across the call to
* get_cmdline(). But submits are retired
* from the same in-order workqueue, so we can
* safely drop the lock here without worrying
* about the submit going away.
*/
mutex_unlock(&dev->struct_mutex);
cmd = kstrdup_quotable_cmdline(task, GFP_KERNEL);
mutex_lock(&dev->struct_mutex);
dev_err(dev->dev, "%s: offending task: %s (%s)\n",
gpu->name, task->comm, cmd);
msm_rd_dump_submit(priv->hangrd, submit,
"offending task: %s (%s)", task->comm, cmd);
kfree(cmd);
} else {
msm_rd_dump_submit(priv->hangrd, submit, NULL);
}
rcu_read_unlock();
}
/*
* Update all the rings with the latest and greatest fence.. this
* needs to happen after msm_rd_dump_submit() to ensure that the
* bo's referenced by the offending submit are still around.
*/
for (i = 0; i < gpu->nr_rings; i++) {
struct msm_ringbuffer *ring = gpu->rb[i];
uint32_t fence = ring->memptrs->fence;
/*
* For the current (faulting?) ring/submit advance the fence by
* one more to clear the faulting submit
*/
if (ring == cur_ring)
fence++;
update_fences(gpu, ring, fence);
}
if (msm_gpu_active(gpu)) {
/* retire completed submits, plus the one that hung: */
retire_submits(gpu);
pm_runtime_get_sync(&gpu->pdev->dev);
gpu->funcs->recover(gpu);
pm_runtime_put_sync(&gpu->pdev->dev);
/*
* Replay all remaining submits starting with highest priority
* ring
*/
for (i = 0; i < gpu->nr_rings; i++) {
struct msm_ringbuffer *ring = gpu->rb[i];
list_for_each_entry(submit, &ring->submits, node)
gpu->funcs->submit(gpu, submit, NULL);
}
}
mutex_unlock(&dev->struct_mutex);
msm_gpu_retire(gpu);
}
static void hangcheck_timer_reset(struct msm_gpu *gpu)
{
DBG("%s", gpu->name);
mod_timer(&gpu->hangcheck_timer,
round_jiffies_up(jiffies + DRM_MSM_HANGCHECK_JIFFIES));
}
static void hangcheck_handler(struct timer_list *t)
{
struct msm_gpu *gpu = from_timer(gpu, t, hangcheck_timer);
struct drm_device *dev = gpu->dev;
struct msm_drm_private *priv = dev->dev_private;
struct msm_ringbuffer *ring = gpu->funcs->active_ring(gpu);
uint32_t fence = ring->memptrs->fence;
if (fence != ring->hangcheck_fence) {
/* some progress has been made.. ya! */
ring->hangcheck_fence = fence;
} else if (fence < ring->seqno) {
/* no progress and not done.. hung! */
ring->hangcheck_fence = fence;
dev_err(dev->dev, "%s: hangcheck detected gpu lockup rb %d!\n",
gpu->name, ring->id);
dev_err(dev->dev, "%s: completed fence: %u\n",
gpu->name, fence);
dev_err(dev->dev, "%s: submitted fence: %u\n",
gpu->name, ring->seqno);
queue_work(priv->wq, &gpu->recover_work);
}
/* if still more pending work, reset the hangcheck timer: */
if (ring->seqno > ring->hangcheck_fence)
hangcheck_timer_reset(gpu);
/* workaround for missing irq: */
queue_work(priv->wq, &gpu->retire_work);
}
/*
* Performance Counters:
*/
/* called under perf_lock */
static int update_hw_cntrs(struct msm_gpu *gpu, uint32_t ncntrs, uint32_t *cntrs)
{
uint32_t current_cntrs[ARRAY_SIZE(gpu->last_cntrs)];
int i, n = min(ncntrs, gpu->num_perfcntrs);
/* read current values: */
for (i = 0; i < gpu->num_perfcntrs; i++)
current_cntrs[i] = gpu_read(gpu, gpu->perfcntrs[i].sample_reg);
/* update cntrs: */
for (i = 0; i < n; i++)
cntrs[i] = current_cntrs[i] - gpu->last_cntrs[i];
/* save current values: */
for (i = 0; i < gpu->num_perfcntrs; i++)
gpu->last_cntrs[i] = current_cntrs[i];
return n;
}
static void update_sw_cntrs(struct msm_gpu *gpu)
{
ktime_t time;
uint32_t elapsed;
unsigned long flags;
spin_lock_irqsave(&gpu->perf_lock, flags);
if (!gpu->perfcntr_active)
goto out;
time = ktime_get();
elapsed = ktime_to_us(ktime_sub(time, gpu->last_sample.time));
gpu->totaltime += elapsed;
if (gpu->last_sample.active)
gpu->activetime += elapsed;
gpu->last_sample.active = msm_gpu_active(gpu);
gpu->last_sample.time = time;
out:
spin_unlock_irqrestore(&gpu->perf_lock, flags);
}
void msm_gpu_perfcntr_start(struct msm_gpu *gpu)
{
unsigned long flags;
pm_runtime_get_sync(&gpu->pdev->dev);
spin_lock_irqsave(&gpu->perf_lock, flags);
/* we could dynamically enable/disable perfcntr registers too.. */
gpu->last_sample.active = msm_gpu_active(gpu);
gpu->last_sample.time = ktime_get();
gpu->activetime = gpu->totaltime = 0;
gpu->perfcntr_active = true;
update_hw_cntrs(gpu, 0, NULL);
spin_unlock_irqrestore(&gpu->perf_lock, flags);
}
void msm_gpu_perfcntr_stop(struct msm_gpu *gpu)
{
gpu->perfcntr_active = false;
pm_runtime_put_sync(&gpu->pdev->dev);
}
/* returns -errno or # of cntrs sampled */
int msm_gpu_perfcntr_sample(struct msm_gpu *gpu, uint32_t *activetime,
uint32_t *totaltime, uint32_t ncntrs, uint32_t *cntrs)
{
unsigned long flags;
int ret;
spin_lock_irqsave(&gpu->perf_lock, flags);
if (!gpu->perfcntr_active) {
ret = -EINVAL;
goto out;
}
*activetime = gpu->activetime;
*totaltime = gpu->totaltime;
gpu->activetime = gpu->totaltime = 0;
ret = update_hw_cntrs(gpu, ncntrs, cntrs);
out:
spin_unlock_irqrestore(&gpu->perf_lock, flags);
return ret;
}
/*
* Cmdstream submission/retirement:
*/
static void retire_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit)
{
int i;
for (i = 0; i < submit->nr_bos; i++) {
struct msm_gem_object *msm_obj = submit->bos[i].obj;
/* move to inactive: */
msm_gem_move_to_inactive(&msm_obj->base);
msm_gem_put_iova(&msm_obj->base, gpu->aspace);
drm_gem_object_put(&msm_obj->base);
}
pm_runtime_mark_last_busy(&gpu->pdev->dev);
pm_runtime_put_autosuspend(&gpu->pdev->dev);
msm_gem_submit_free(submit);
}
static void retire_submits(struct msm_gpu *gpu)
{
struct drm_device *dev = gpu->dev;
struct msm_gem_submit *submit, *tmp;
int i;
WARN_ON(!mutex_is_locked(&dev->struct_mutex));
/* Retire the commits starting with highest priority */
for (i = 0; i < gpu->nr_rings; i++) {
struct msm_ringbuffer *ring = gpu->rb[i];
list_for_each_entry_safe(submit, tmp, &ring->submits, node) {
if (dma_fence_is_signaled(submit->fence))
retire_submit(gpu, submit);
}
}
}
static void retire_worker(struct work_struct *work)
{
struct msm_gpu *gpu = container_of(work, struct msm_gpu, retire_work);
struct drm_device *dev = gpu->dev;
int i;
for (i = 0; i < gpu->nr_rings; i++)
update_fences(gpu, gpu->rb[i], gpu->rb[i]->memptrs->fence);
mutex_lock(&dev->struct_mutex);
retire_submits(gpu);
mutex_unlock(&dev->struct_mutex);
}
/* call from irq handler to schedule work to retire bo's */
void msm_gpu_retire(struct msm_gpu *gpu)
{
struct msm_drm_private *priv = gpu->dev->dev_private;
queue_work(priv->wq, &gpu->retire_work);
update_sw_cntrs(gpu);
}
/* add bo's to gpu's ring, and kick gpu: */
void msm_gpu_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit,
struct msm_file_private *ctx)
{
struct drm_device *dev = gpu->dev;
struct msm_drm_private *priv = dev->dev_private;
struct msm_ringbuffer *ring = submit->ring;
int i;
WARN_ON(!mutex_is_locked(&dev->struct_mutex));
pm_runtime_get_sync(&gpu->pdev->dev);
msm_gpu_hw_init(gpu);
submit->seqno = ++ring->seqno;
list_add_tail(&submit->node, &ring->submits);
msm_rd_dump_submit(priv->rd, submit, NULL);
update_sw_cntrs(gpu);
for (i = 0; i < submit->nr_bos; i++) {
struct msm_gem_object *msm_obj = submit->bos[i].obj;
uint64_t iova;
/* can't happen yet.. but when we add 2d support we'll have
* to deal w/ cross-ring synchronization:
*/
WARN_ON(is_active(msm_obj) && (msm_obj->gpu != gpu));
/* submit takes a reference to the bo and iova until retired: */
drm_gem_object_get(&msm_obj->base);
msm_gem_get_iova(&msm_obj->base,
submit->gpu->aspace, &iova);
if (submit->bos[i].flags & MSM_SUBMIT_BO_WRITE)
msm_gem_move_to_active(&msm_obj->base, gpu, true, submit->fence);
else if (submit->bos[i].flags & MSM_SUBMIT_BO_READ)
msm_gem_move_to_active(&msm_obj->base, gpu, false, submit->fence);
}
gpu->funcs->submit(gpu, submit, ctx);
priv->lastctx = ctx;
hangcheck_timer_reset(gpu);
}
/*
* Init/Cleanup:
*/
static irqreturn_t irq_handler(int irq, void *data)
{
struct msm_gpu *gpu = data;
return gpu->funcs->irq(gpu);
}
static struct clk *get_clock(struct device *dev, const char *name)
{
struct clk *clk = devm_clk_get(dev, name);
return IS_ERR(clk) ? NULL : clk;
}
static int get_clocks(struct platform_device *pdev, struct msm_gpu *gpu)
{
struct device *dev = &pdev->dev;
struct property *prop;
const char *name;
int i = 0;
gpu->nr_clocks = of_property_count_strings(dev->of_node, "clock-names");
if (gpu->nr_clocks < 1) {
gpu->nr_clocks = 0;
return 0;
}
gpu->grp_clks = devm_kcalloc(dev, sizeof(struct clk *), gpu->nr_clocks,
GFP_KERNEL);
if (!gpu->grp_clks) {
gpu->nr_clocks = 0;
return -ENOMEM;
}
of_property_for_each_string(dev->of_node, "clock-names", prop, name) {
gpu->grp_clks[i] = get_clock(dev, name);
/* Remember the key clocks that we need to control later */
if (!strcmp(name, "core") || !strcmp(name, "core_clk"))
gpu->core_clk = gpu->grp_clks[i];
else if (!strcmp(name, "rbbmtimer") || !strcmp(name, "rbbmtimer_clk"))
gpu->rbbmtimer_clk = gpu->grp_clks[i];
++i;
}
return 0;
}
static struct msm_gem_address_space *
msm_gpu_create_address_space(struct msm_gpu *gpu, struct platform_device *pdev,
uint64_t va_start, uint64_t va_end)
{
struct iommu_domain *iommu;
struct msm_gem_address_space *aspace;
int ret;
/*
* Setup IOMMU.. eventually we will (I think) do this once per context
* and have separate page tables per context. For now, to keep things
* simple and to get something working, just use a single address space:
*/
iommu = iommu_domain_alloc(&platform_bus_type);
if (!iommu)
return NULL;
iommu->geometry.aperture_start = va_start;
iommu->geometry.aperture_end = va_end;
dev_info(gpu->dev->dev, "%s: using IOMMU\n", gpu->name);
aspace = msm_gem_address_space_create(&pdev->dev, iommu, "gpu");
if (IS_ERR(aspace)) {
dev_err(gpu->dev->dev, "failed to init iommu: %ld\n",
PTR_ERR(aspace));
iommu_domain_free(iommu);
return ERR_CAST(aspace);
}
ret = aspace->mmu->funcs->attach(aspace->mmu, NULL, 0);
if (ret) {
msm_gem_address_space_put(aspace);
return ERR_PTR(ret);
}
return aspace;
}
int msm_gpu_init(struct drm_device *drm, struct platform_device *pdev,
struct msm_gpu *gpu, const struct msm_gpu_funcs *funcs,
const char *name, struct msm_gpu_config *config)
{
int i, ret, nr_rings = config->nr_rings;
void *memptrs;
uint64_t memptrs_iova;
if (WARN_ON(gpu->num_perfcntrs > ARRAY_SIZE(gpu->last_cntrs)))
gpu->num_perfcntrs = ARRAY_SIZE(gpu->last_cntrs);
gpu->dev = drm;
gpu->funcs = funcs;
gpu->name = name;
INIT_LIST_HEAD(&gpu->active_list);
INIT_WORK(&gpu->retire_work, retire_worker);
INIT_WORK(&gpu->recover_work, recover_worker);
timer_setup(&gpu->hangcheck_timer, hangcheck_handler, 0);
spin_lock_init(&gpu->perf_lock);
/* Map registers: */
gpu->mmio = msm_ioremap(pdev, config->ioname, name);
if (IS_ERR(gpu->mmio)) {
ret = PTR_ERR(gpu->mmio);
goto fail;
}
/* Get Interrupt: */
gpu->irq = platform_get_irq_byname(pdev, config->irqname);
if (gpu->irq < 0) {
ret = gpu->irq;
dev_err(drm->dev, "failed to get irq: %d\n", ret);
goto fail;
}
ret = devm_request_irq(&pdev->dev, gpu->irq, irq_handler,
IRQF_TRIGGER_HIGH, gpu->name, gpu);
if (ret) {
dev_err(drm->dev, "failed to request IRQ%u: %d\n", gpu->irq, ret);
goto fail;
}
ret = get_clocks(pdev, gpu);
if (ret)
goto fail;
gpu->ebi1_clk = msm_clk_get(pdev, "bus");
DBG("ebi1_clk: %p", gpu->ebi1_clk);
if (IS_ERR(gpu->ebi1_clk))
gpu->ebi1_clk = NULL;
/* Acquire regulators: */
gpu->gpu_reg = devm_regulator_get(&pdev->dev, "vdd");
DBG("gpu_reg: %p", gpu->gpu_reg);
if (IS_ERR(gpu->gpu_reg))
gpu->gpu_reg = NULL;
gpu->gpu_cx = devm_regulator_get(&pdev->dev, "vddcx");
DBG("gpu_cx: %p", gpu->gpu_cx);
if (IS_ERR(gpu->gpu_cx))
gpu->gpu_cx = NULL;
gpu->pdev = pdev;
platform_set_drvdata(pdev, gpu);
msm_devfreq_init(gpu);
gpu->aspace = msm_gpu_create_address_space(gpu, pdev,
config->va_start, config->va_end);
if (gpu->aspace == NULL)
dev_info(drm->dev, "%s: no IOMMU, fallback to VRAM carveout!\n", name);
else if (IS_ERR(gpu->aspace)) {
ret = PTR_ERR(gpu->aspace);
goto fail;
}
memptrs = msm_gem_kernel_new(drm, sizeof(*gpu->memptrs_bo),
MSM_BO_UNCACHED, gpu->aspace, &gpu->memptrs_bo,
&memptrs_iova);
if (IS_ERR(memptrs)) {
ret = PTR_ERR(memptrs);
dev_err(drm->dev, "could not allocate memptrs: %d\n", ret);
goto fail;
}
if (nr_rings > ARRAY_SIZE(gpu->rb)) {
DRM_DEV_INFO_ONCE(drm->dev, "Only creating %zu ringbuffers\n",
ARRAY_SIZE(gpu->rb));
nr_rings = ARRAY_SIZE(gpu->rb);
}
/* Create ringbuffer(s): */
for (i = 0; i < nr_rings; i++) {
gpu->rb[i] = msm_ringbuffer_new(gpu, i, memptrs, memptrs_iova);
if (IS_ERR(gpu->rb[i])) {
ret = PTR_ERR(gpu->rb[i]);
dev_err(drm->dev,
"could not create ringbuffer %d: %d\n", i, ret);
goto fail;
}
memptrs += sizeof(struct msm_rbmemptrs);
memptrs_iova += sizeof(struct msm_rbmemptrs);
}
gpu->nr_rings = nr_rings;
return 0;
fail:
for (i = 0; i < ARRAY_SIZE(gpu->rb); i++) {
msm_ringbuffer_destroy(gpu->rb[i]);
gpu->rb[i] = NULL;
}
if (gpu->memptrs_bo) {
msm_gem_put_vaddr(gpu->memptrs_bo);
msm_gem_put_iova(gpu->memptrs_bo, gpu->aspace);
drm_gem_object_put_unlocked(gpu->memptrs_bo);
}
platform_set_drvdata(pdev, NULL);
return ret;
}
void msm_gpu_cleanup(struct msm_gpu *gpu)
{
int i;
DBG("%s", gpu->name);
WARN_ON(!list_empty(&gpu->active_list));
for (i = 0; i < ARRAY_SIZE(gpu->rb); i++) {
msm_ringbuffer_destroy(gpu->rb[i]);
gpu->rb[i] = NULL;
}
if (gpu->memptrs_bo) {
msm_gem_put_vaddr(gpu->memptrs_bo);
msm_gem_put_iova(gpu->memptrs_bo, gpu->aspace);
drm_gem_object_put_unlocked(gpu->memptrs_bo);
}
if (!IS_ERR_OR_NULL(gpu->aspace)) {
gpu->aspace->mmu->funcs->detach(gpu->aspace->mmu,
NULL, 0);
msm_gem_address_space_put(gpu->aspace);
}
}