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Message-ID: <1381319650-9799-2-git-send-email-amerilainen@nvidia.com>
Date: Wed, 9 Oct 2013 14:54:08 +0300
From: Arto Merilainen <amerilainen@...dia.com>
To: <tbergstrom@...dia.com>, <thierry.reding@...il.com>
CC: <dri-devel@...ts.freedesktop.org>, <linux-tegra@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <amerilainen@...dia.com>
Subject: [PATCH 1/3] gpu: host1x: Add syncpoint base support
This patch adds support for hardware syncpoint bases. This creates
a simple mechanism for waiting an operation to complete in the middle
of the command buffer.
Signed-off-by: Arto Merilainen <amerilainen@...dia.com>
---
drivers/gpu/host1x/dev.h | 2 ++
drivers/gpu/host1x/hw/channel_hw.c | 19 +++++++++++
drivers/gpu/host1x/hw/hw_host1x01_uclass.h | 6 ++++
drivers/gpu/host1x/syncpt.c | 55 +++++++++++++++++++++++++++---
drivers/gpu/host1x/syncpt.h | 10 ++++++
5 files changed, 87 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/host1x/dev.h b/drivers/gpu/host1x/dev.h
index bed90a8..89a3c1e 100644
--- a/drivers/gpu/host1x/dev.h
+++ b/drivers/gpu/host1x/dev.h
@@ -26,6 +26,7 @@
#include "cdma.h"
#include "job.h"
+struct host1x_base;
struct host1x_syncpt;
struct host1x_channel;
struct host1x_cdma;
@@ -102,6 +103,7 @@ struct host1x {
void __iomem *regs;
struct host1x_syncpt *syncpt;
+ struct host1x_base *bases;
struct device *dev;
struct clk *clk;
diff --git a/drivers/gpu/host1x/hw/channel_hw.c b/drivers/gpu/host1x/hw/channel_hw.c
index ee19962..5f9f735 100644
--- a/drivers/gpu/host1x/hw/channel_hw.c
+++ b/drivers/gpu/host1x/hw/channel_hw.c
@@ -67,6 +67,21 @@ static void submit_gathers(struct host1x_job *job)
}
}
+static inline void synchronize_syncpt_base(struct host1x_job *job)
+{
+ struct host1x_channel *ch = job->channel;
+ struct host1x *host = dev_get_drvdata(ch->dev->parent);
+ struct host1x_syncpt *sp = host->syncpt + job->syncpt_id;
+ u32 base_id = sp->base->id;
+ u32 base_val = host1x_syncpt_read_max(sp);
+
+ host1x_cdma_push(&ch->cdma,
+ host1x_opcode_setclass(HOST1X_CLASS_HOST1X,
+ host1x_uclass_load_syncpt_base_r(), 1),
+ host1x_uclass_load_syncpt_base_base_indx_f(base_id) |
+ host1x_uclass_load_syncpt_base_value_f(base_val));
+}
+
static int channel_submit(struct host1x_job *job)
{
struct host1x_channel *ch = job->channel;
@@ -118,6 +133,10 @@ static int channel_submit(struct host1x_job *job)
host1x_syncpt_read_max(sp)));
}
+ /* Synchronize base register to allow using it for relative waiting */
+ if (sp->base)
+ synchronize_syncpt_base(job);
+
syncval = host1x_syncpt_incr_max(sp, user_syncpt_incrs);
job->syncpt_end = syncval;
diff --git a/drivers/gpu/host1x/hw/hw_host1x01_uclass.h b/drivers/gpu/host1x/hw/hw_host1x01_uclass.h
index 42f3ce1..f755359 100644
--- a/drivers/gpu/host1x/hw/hw_host1x01_uclass.h
+++ b/drivers/gpu/host1x/hw/hw_host1x01_uclass.h
@@ -111,6 +111,12 @@ static inline u32 host1x_uclass_wait_syncpt_base_offset_f(u32 v)
}
#define HOST1X_UCLASS_WAIT_SYNCPT_BASE_OFFSET_F(v) \
host1x_uclass_wait_syncpt_base_offset_f(v)
+static inline u32 host1x_uclass_load_syncpt_base_r(void)
+{
+ return 0xb;
+}
+#define HOST1X_UCLASS_LOAD_SYNCPT_BASE \
+ host1x_uclass_load_syncpt_base_r()
static inline u32 host1x_uclass_load_syncpt_base_base_indx_f(u32 v)
{
return (v & 0xff) << 24;
diff --git a/drivers/gpu/host1x/syncpt.c b/drivers/gpu/host1x/syncpt.c
index 409745b..48927b1 100644
--- a/drivers/gpu/host1x/syncpt.c
+++ b/drivers/gpu/host1x/syncpt.c
@@ -30,9 +30,32 @@
#define SYNCPT_CHECK_PERIOD (2 * HZ)
#define MAX_STUCK_CHECK_COUNT 15
+static struct host1x_base *host1x_base_alloc(struct host1x *host)
+{
+ struct host1x_base *base = host->bases;
+ int i;
+
+ for (i = 0; i < host->info->nb_bases && base->reserved; i++, base++)
+ ;
+
+ if (i >= host->info->nb_bases)
+ return NULL;
+
+ base->reserved = true;
+ return base;
+}
+
+static void host1x_base_free(struct host1x_base *base)
+{
+ if (!base)
+ return;
+ base->reserved = false;
+}
+
static struct host1x_syncpt *_host1x_syncpt_alloc(struct host1x *host,
struct device *dev,
- bool client_managed)
+ bool client_managed,
+ bool support_base)
{
int i;
struct host1x_syncpt *sp = host->syncpt;
@@ -44,6 +67,12 @@ static struct host1x_syncpt *_host1x_syncpt_alloc(struct host1x *host,
if (i >= host->info->nb_pts)
return NULL;
+ if (support_base) {
+ sp->base = host1x_base_alloc(host);
+ if (!sp->base)
+ return NULL;
+ }
+
name = kasprintf(GFP_KERNEL, "%02d-%s", sp->id,
dev ? dev_name(dev) : NULL);
if (!name)
@@ -304,24 +333,31 @@ int host1x_syncpt_patch_wait(struct host1x_syncpt *sp, void *patch_addr)
int host1x_syncpt_init(struct host1x *host)
{
struct host1x_syncpt *syncpt;
+ struct host1x_base *bases;
int i;
+ bases = devm_kzalloc(host->dev, sizeof(*bases) * host->info->nb_bases,
+ GFP_KERNEL);
syncpt = devm_kzalloc(host->dev, sizeof(*syncpt) * host->info->nb_pts,
GFP_KERNEL);
- if (!syncpt)
+ if (!syncpt || !bases)
return -ENOMEM;
- for (i = 0; i < host->info->nb_pts; ++i) {
+ for (i = 0; i < host->info->nb_bases; i++)
+ bases[i].id = i;
+
+ for (i = 0; i < host->info->nb_pts; i++) {
syncpt[i].id = i;
syncpt[i].host = host;
}
host->syncpt = syncpt;
+ host->bases = bases;
host1x_syncpt_restore(host);
/* Allocate sync point to use for clearing waits for expired fences */
- host->nop_sp = _host1x_syncpt_alloc(host, NULL, false);
+ host->nop_sp = _host1x_syncpt_alloc(host, NULL, false, false);
if (!host->nop_sp)
return -ENOMEM;
@@ -332,7 +368,14 @@ struct host1x_syncpt *host1x_syncpt_request(struct device *dev,
bool client_managed)
{
struct host1x *host = dev_get_drvdata(dev->parent);
- return _host1x_syncpt_alloc(host, dev, client_managed);
+ return _host1x_syncpt_alloc(host, dev, client_managed, false);
+}
+
+struct host1x_syncpt *host1x_syncpt_request_based(struct device *dev,
+ bool client_managed)
+{
+ struct host1x *host = dev_get_drvdata(dev->parent);
+ return _host1x_syncpt_alloc(host, dev, client_managed, true);
}
void host1x_syncpt_free(struct host1x_syncpt *sp)
@@ -340,7 +383,9 @@ void host1x_syncpt_free(struct host1x_syncpt *sp)
if (!sp)
return;
+ host1x_base_free(sp->base);
kfree(sp->name);
+ sp->base = NULL;
sp->dev = NULL;
sp->name = NULL;
sp->client_managed = false;
diff --git a/drivers/gpu/host1x/syncpt.h b/drivers/gpu/host1x/syncpt.h
index 267c0b9..852dc76 100644
--- a/drivers/gpu/host1x/syncpt.h
+++ b/drivers/gpu/host1x/syncpt.h
@@ -30,6 +30,11 @@ struct host1x;
/* Reserved for replacing an expired wait with a NOP */
#define HOST1X_SYNCPT_RESERVED 0
+struct host1x_base {
+ u8 id;
+ bool reserved;
+};
+
struct host1x_syncpt {
int id;
atomic_t min_val;
@@ -39,6 +44,7 @@ struct host1x_syncpt {
bool client_managed;
struct host1x *host;
struct device *dev;
+ struct host1x_base *base;
/* interrupt data */
struct host1x_syncpt_intr intr;
@@ -156,6 +162,10 @@ u32 host1x_syncpt_id(struct host1x_syncpt *sp);
struct host1x_syncpt *host1x_syncpt_request(struct device *dev,
bool client_managed);
+/* Allocate a sync point and a base for a device */
+struct host1x_syncpt *host1x_syncpt_request_based(struct device *dev,
+ bool client_managed);
+
/* Free a sync point. */
void host1x_syncpt_free(struct host1x_syncpt *sp);
--
1.8.1.5
--
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