提交 5441ea11 编写于 作者: D Dave Airlie

Merge tag 'drm-vc4-fixes-2016-02-17' of github.com:anholt/linux into drm-fixes

This pull request fixes GPU reset (which was disabled shortly after
V3D integration due to build breakage) and waits for idle in the
presence of signals (which X likes to do a lot).

* tag 'drm-vc4-fixes-2016-02-17' of github.com:anholt/linux:
  drm/vc4: Use runtime PM to power cycle the device when the GPU hangs.
  drm/vc4: Enable runtime PM.
  drm/vc4: Fix spurious GPU resets due to BO reuse.
  drm/vc4: Drop error message on seqno wait timeouts.
  drm/vc4: Fix -ERESTARTSYS error return from BO waits.
  drm/vc4: Return an ERR_PTR from BO creation instead of NULL.
  drm/vc4: Fix the clear color for the first tile rendered.
  drm/vc4: Validate that WAIT_BO padding is cleared.
......@@ -215,7 +215,7 @@ struct vc4_bo *vc4_bo_create(struct drm_device *dev, size_t unaligned_size,
struct drm_gem_cma_object *cma_obj;
if (size == 0)
return NULL;
return ERR_PTR(-EINVAL);
/* First, try to get a vc4_bo from the kernel BO cache. */
if (from_cache) {
......@@ -237,7 +237,7 @@ struct vc4_bo *vc4_bo_create(struct drm_device *dev, size_t unaligned_size,
if (IS_ERR(cma_obj)) {
DRM_ERROR("Failed to allocate from CMA:\n");
vc4_bo_stats_dump(vc4);
return NULL;
return ERR_PTR(-ENOMEM);
}
}
......@@ -259,8 +259,8 @@ int vc4_dumb_create(struct drm_file *file_priv,
args->size = args->pitch * args->height;
bo = vc4_bo_create(dev, args->size, false);
if (!bo)
return -ENOMEM;
if (IS_ERR(bo))
return PTR_ERR(bo);
ret = drm_gem_handle_create(file_priv, &bo->base.base, &args->handle);
drm_gem_object_unreference_unlocked(&bo->base.base);
......@@ -443,8 +443,8 @@ int vc4_create_bo_ioctl(struct drm_device *dev, void *data,
* get zeroed, and that might leak data between users.
*/
bo = vc4_bo_create(dev, args->size, false);
if (!bo)
return -ENOMEM;
if (IS_ERR(bo))
return PTR_ERR(bo);
ret = drm_gem_handle_create(file_priv, &bo->base.base, &args->handle);
drm_gem_object_unreference_unlocked(&bo->base.base);
......@@ -496,8 +496,8 @@ vc4_create_shader_bo_ioctl(struct drm_device *dev, void *data,
}
bo = vc4_bo_create(dev, args->size, true);
if (!bo)
return -ENOMEM;
if (IS_ERR(bo))
return PTR_ERR(bo);
ret = copy_from_user(bo->base.vaddr,
(void __user *)(uintptr_t)args->data,
......
......@@ -91,8 +91,12 @@ struct vc4_dev {
struct vc4_bo *overflow_mem;
struct work_struct overflow_mem_work;
int power_refcount;
/* Mutex controlling the power refcount. */
struct mutex power_lock;
struct {
uint32_t last_ct0ca, last_ct1ca;
struct timer_list timer;
struct work_struct reset_work;
} hangcheck;
......@@ -142,6 +146,7 @@ struct vc4_seqno_cb {
};
struct vc4_v3d {
struct vc4_dev *vc4;
struct platform_device *pdev;
void __iomem *regs;
};
......@@ -192,6 +197,11 @@ struct vc4_exec_info {
/* Sequence number for this bin/render job. */
uint64_t seqno;
/* Last current addresses the hardware was processing when the
* hangcheck timer checked on us.
*/
uint32_t last_ct0ca, last_ct1ca;
/* Kernel-space copy of the ioctl arguments */
struct drm_vc4_submit_cl *args;
......@@ -434,7 +444,6 @@ void vc4_plane_async_set_fb(struct drm_plane *plane,
extern struct platform_driver vc4_v3d_driver;
int vc4_v3d_debugfs_ident(struct seq_file *m, void *unused);
int vc4_v3d_debugfs_regs(struct seq_file *m, void *unused);
int vc4_v3d_set_power(struct vc4_dev *vc4, bool on);
/* vc4_validate.c */
int
......
......@@ -23,6 +23,7 @@
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/device.h>
#include <linux/io.h>
......@@ -228,8 +229,16 @@ vc4_reset(struct drm_device *dev)
struct vc4_dev *vc4 = to_vc4_dev(dev);
DRM_INFO("Resetting GPU.\n");
vc4_v3d_set_power(vc4, false);
vc4_v3d_set_power(vc4, true);
mutex_lock(&vc4->power_lock);
if (vc4->power_refcount) {
/* Power the device off and back on the by dropping the
* reference on runtime PM.
*/
pm_runtime_put_sync_suspend(&vc4->v3d->pdev->dev);
pm_runtime_get_sync(&vc4->v3d->pdev->dev);
}
mutex_unlock(&vc4->power_lock);
vc4_irq_reset(dev);
......@@ -257,10 +266,17 @@ vc4_hangcheck_elapsed(unsigned long data)
struct drm_device *dev = (struct drm_device *)data;
struct vc4_dev *vc4 = to_vc4_dev(dev);
uint32_t ct0ca, ct1ca;
unsigned long irqflags;
struct vc4_exec_info *exec;
spin_lock_irqsave(&vc4->job_lock, irqflags);
exec = vc4_first_job(vc4);
/* If idle, we can stop watching for hangs. */
if (list_empty(&vc4->job_list))
if (!exec) {
spin_unlock_irqrestore(&vc4->job_lock, irqflags);
return;
}
ct0ca = V3D_READ(V3D_CTNCA(0));
ct1ca = V3D_READ(V3D_CTNCA(1));
......@@ -268,14 +284,16 @@ vc4_hangcheck_elapsed(unsigned long data)
/* If we've made any progress in execution, rearm the timer
* and wait.
*/
if (ct0ca != vc4->hangcheck.last_ct0ca ||
ct1ca != vc4->hangcheck.last_ct1ca) {
vc4->hangcheck.last_ct0ca = ct0ca;
vc4->hangcheck.last_ct1ca = ct1ca;
if (ct0ca != exec->last_ct0ca || ct1ca != exec->last_ct1ca) {
exec->last_ct0ca = ct0ca;
exec->last_ct1ca = ct1ca;
spin_unlock_irqrestore(&vc4->job_lock, irqflags);
vc4_queue_hangcheck(dev);
return;
}
spin_unlock_irqrestore(&vc4->job_lock, irqflags);
/* We've gone too long with no progress, reset. This has to
* be done from a work struct, since resetting can sleep and
* this timer hook isn't allowed to.
......@@ -340,12 +358,7 @@ vc4_wait_for_seqno(struct drm_device *dev, uint64_t seqno, uint64_t timeout_ns,
finish_wait(&vc4->job_wait_queue, &wait);
trace_vc4_wait_for_seqno_end(dev, seqno);
if (ret && ret != -ERESTARTSYS) {
DRM_ERROR("timeout waiting for render thread idle\n");
return ret;
}
return 0;
return ret;
}
static void
......@@ -578,9 +591,9 @@ vc4_get_bcl(struct drm_device *dev, struct vc4_exec_info *exec)
}
bo = vc4_bo_create(dev, exec_size, true);
if (!bo) {
if (IS_ERR(bo)) {
DRM_ERROR("Couldn't allocate BO for binning\n");
ret = -ENOMEM;
ret = PTR_ERR(bo);
goto fail;
}
exec->exec_bo = &bo->base;
......@@ -617,6 +630,7 @@ vc4_get_bcl(struct drm_device *dev, struct vc4_exec_info *exec)
static void
vc4_complete_exec(struct drm_device *dev, struct vc4_exec_info *exec)
{
struct vc4_dev *vc4 = to_vc4_dev(dev);
unsigned i;
/* Need the struct lock for drm_gem_object_unreference(). */
......@@ -635,6 +649,11 @@ vc4_complete_exec(struct drm_device *dev, struct vc4_exec_info *exec)
}
mutex_unlock(&dev->struct_mutex);
mutex_lock(&vc4->power_lock);
if (--vc4->power_refcount == 0)
pm_runtime_put(&vc4->v3d->pdev->dev);
mutex_unlock(&vc4->power_lock);
kfree(exec);
}
......@@ -746,6 +765,9 @@ vc4_wait_bo_ioctl(struct drm_device *dev, void *data,
struct drm_gem_object *gem_obj;
struct vc4_bo *bo;
if (args->pad != 0)
return -EINVAL;
gem_obj = drm_gem_object_lookup(dev, file_priv, args->handle);
if (!gem_obj) {
DRM_ERROR("Failed to look up GEM BO %d\n", args->handle);
......@@ -772,7 +794,7 @@ vc4_submit_cl_ioctl(struct drm_device *dev, void *data,
struct vc4_dev *vc4 = to_vc4_dev(dev);
struct drm_vc4_submit_cl *args = data;
struct vc4_exec_info *exec;
int ret;
int ret = 0;
if ((args->flags & ~VC4_SUBMIT_CL_USE_CLEAR_COLOR) != 0) {
DRM_ERROR("Unknown flags: 0x%02x\n", args->flags);
......@@ -785,6 +807,15 @@ vc4_submit_cl_ioctl(struct drm_device *dev, void *data,
return -ENOMEM;
}
mutex_lock(&vc4->power_lock);
if (vc4->power_refcount++ == 0)
ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev);
mutex_unlock(&vc4->power_lock);
if (ret < 0) {
kfree(exec);
return ret;
}
exec->args = args;
INIT_LIST_HEAD(&exec->unref_list);
......@@ -839,6 +870,8 @@ vc4_gem_init(struct drm_device *dev)
(unsigned long)dev);
INIT_WORK(&vc4->job_done_work, vc4_job_done_work);
mutex_init(&vc4->power_lock);
}
void
......
......@@ -57,7 +57,7 @@ vc4_overflow_mem_work(struct work_struct *work)
struct vc4_bo *bo;
bo = vc4_bo_create(dev, 256 * 1024, true);
if (!bo) {
if (IS_ERR(bo)) {
DRM_ERROR("Couldn't allocate binner overflow mem\n");
return;
}
......
......@@ -316,20 +316,11 @@ static int vc4_create_rcl_bo(struct drm_device *dev, struct vc4_exec_info *exec,
size += xtiles * ytiles * loop_body_size;
setup->rcl = &vc4_bo_create(dev, size, true)->base;
if (!setup->rcl)
return -ENOMEM;
if (IS_ERR(setup->rcl))
return PTR_ERR(setup->rcl);
list_add_tail(&to_vc4_bo(&setup->rcl->base)->unref_head,
&exec->unref_list);
rcl_u8(setup, VC4_PACKET_TILE_RENDERING_MODE_CONFIG);
rcl_u32(setup,
(setup->color_write ? (setup->color_write->paddr +
args->color_write.offset) :
0));
rcl_u16(setup, args->width);
rcl_u16(setup, args->height);
rcl_u16(setup, args->color_write.bits);
/* The tile buffer gets cleared when the previous tile is stored. If
* the clear values changed between frames, then the tile buffer has
* stale clear values in it, so we have to do a store in None mode (no
......@@ -349,6 +340,15 @@ static int vc4_create_rcl_bo(struct drm_device *dev, struct vc4_exec_info *exec,
rcl_u32(setup, 0); /* no address, since we're in None mode */
}
rcl_u8(setup, VC4_PACKET_TILE_RENDERING_MODE_CONFIG);
rcl_u32(setup,
(setup->color_write ? (setup->color_write->paddr +
args->color_write.offset) :
0));
rcl_u16(setup, args->width);
rcl_u16(setup, args->height);
rcl_u16(setup, args->color_write.bits);
for (y = min_y_tile; y <= max_y_tile; y++) {
for (x = min_x_tile; x <= max_x_tile; x++) {
bool first = (x == min_x_tile && y == min_y_tile);
......
......@@ -17,6 +17,7 @@
*/
#include "linux/component.h"
#include "linux/pm_runtime.h"
#include "vc4_drv.h"
#include "vc4_regs.h"
......@@ -144,18 +145,6 @@ int vc4_v3d_debugfs_ident(struct seq_file *m, void *unused)
}
#endif /* CONFIG_DEBUG_FS */
int
vc4_v3d_set_power(struct vc4_dev *vc4, bool on)
{
/* XXX: This interface is needed for GPU reset, and the way to
* do it is to turn our power domain off and back on. We
* can't just reset from within the driver, because the reset
* bits are in the power domain's register area, and get set
* during the poweron process.
*/
return 0;
}
static void vc4_v3d_init_hw(struct drm_device *dev)
{
struct vc4_dev *vc4 = to_vc4_dev(dev);
......@@ -167,6 +156,29 @@ static void vc4_v3d_init_hw(struct drm_device *dev)
V3D_WRITE(V3D_VPMBASE, 0);
}
#ifdef CONFIG_PM
static int vc4_v3d_runtime_suspend(struct device *dev)
{
struct vc4_v3d *v3d = dev_get_drvdata(dev);
struct vc4_dev *vc4 = v3d->vc4;
vc4_irq_uninstall(vc4->dev);
return 0;
}
static int vc4_v3d_runtime_resume(struct device *dev)
{
struct vc4_v3d *v3d = dev_get_drvdata(dev);
struct vc4_dev *vc4 = v3d->vc4;
vc4_v3d_init_hw(vc4->dev);
vc4_irq_postinstall(vc4->dev);
return 0;
}
#endif
static int vc4_v3d_bind(struct device *dev, struct device *master, void *data)
{
struct platform_device *pdev = to_platform_device(dev);
......@@ -179,6 +191,8 @@ static int vc4_v3d_bind(struct device *dev, struct device *master, void *data)
if (!v3d)
return -ENOMEM;
dev_set_drvdata(dev, v3d);
v3d->pdev = pdev;
v3d->regs = vc4_ioremap_regs(pdev, 0);
......@@ -186,6 +200,7 @@ static int vc4_v3d_bind(struct device *dev, struct device *master, void *data)
return PTR_ERR(v3d->regs);
vc4->v3d = v3d;
v3d->vc4 = vc4;
if (V3D_READ(V3D_IDENT0) != V3D_EXPECTED_IDENT0) {
DRM_ERROR("V3D_IDENT0 read 0x%08x instead of 0x%08x\n",
......@@ -207,6 +222,8 @@ static int vc4_v3d_bind(struct device *dev, struct device *master, void *data)
return ret;
}
pm_runtime_enable(dev);
return 0;
}
......@@ -216,6 +233,8 @@ static void vc4_v3d_unbind(struct device *dev, struct device *master,
struct drm_device *drm = dev_get_drvdata(master);
struct vc4_dev *vc4 = to_vc4_dev(drm);
pm_runtime_disable(dev);
drm_irq_uninstall(drm);
/* Disable the binner's overflow memory address, so the next
......@@ -228,6 +247,10 @@ static void vc4_v3d_unbind(struct device *dev, struct device *master,
vc4->v3d = NULL;
}
static const struct dev_pm_ops vc4_v3d_pm_ops = {
SET_RUNTIME_PM_OPS(vc4_v3d_runtime_suspend, vc4_v3d_runtime_resume, NULL)
};
static const struct component_ops vc4_v3d_ops = {
.bind = vc4_v3d_bind,
.unbind = vc4_v3d_unbind,
......@@ -255,5 +278,6 @@ struct platform_driver vc4_v3d_driver = {
.driver = {
.name = "vc4_v3d",
.of_match_table = vc4_v3d_dt_match,
.pm = &vc4_v3d_pm_ops,
},
};
......@@ -401,8 +401,8 @@ validate_tile_binning_config(VALIDATE_ARGS)
tile_bo = vc4_bo_create(dev, exec->tile_alloc_offset + tile_alloc_size,
true);
exec->tile_bo = &tile_bo->base;
if (!exec->tile_bo)
return -ENOMEM;
if (IS_ERR(exec->tile_bo))
return PTR_ERR(exec->tile_bo);
list_add_tail(&tile_bo->unref_head, &exec->unref_list);
/* tile alloc address. */
......
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