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authorDave Airlie <airlied@redhat.com>2017-06-20 11:07:03 +1000
committerDave Airlie <airlied@redhat.com>2017-06-20 11:07:03 +1000
commit4a525bad68b424d167042342db19d0c0e80e8b29 (patch)
tree95cb33d8752caaa9117644b0dde5e51845e78773 /drivers/gpu/host1x
parent925344ccc91d7a7fd84cab2dece1c34bbd86fd8c (diff)
parent43240bbd871e2c8f89584d369278a3d18680d9ea (diff)
Merge tag 'drm/tegra/for-4.13-rc1' of git://anongit.freedesktop.org/tegra/linux into drm-next
drm/tegra: Changes for v4.13-rc1 This starts off with the addition of more documentation for the host1x and DRM drivers and finishes with a slew of fixes and enhancements for the staging IOCTLs as a result of the awesome work done by Dmitry and Erik on the grate reverse-engineering effort. * tag 'drm/tegra/for-4.13-rc1' of git://anongit.freedesktop.org/tegra/linux: gpu: host1x: At first try a non-blocking allocation for the gather copy gpu: host1x: Refactor channel allocation code gpu: host1x: Remove unused host1x_cdma_stop() definition gpu: host1x: Remove unused 'struct host1x_cmdbuf' gpu: host1x: Check waits in the firewall gpu: host1x: Correct swapped arguments in the is_addr_reg() definition gpu: host1x: Forbid unrelated SETCLASS opcode in the firewall gpu: host1x: Forbid RESTART opcode in the firewall gpu: host1x: Forbid relocation address shifting in the firewall gpu: host1x: Do not leak BO's phys address to userspace gpu: host1x: Correct host1x_job_pin() error handling gpu: host1x: Initialize firewall class to the job's one drm/tegra: dc: Disable plane if it is invisible drm/tegra: dc: Apply clipping to the plane drm/tegra: dc: Avoid reset asserts on Tegra20 drm/tegra: Check syncpoint ID in the 'submit' IOCTL drm/tegra: Correct copying of waitchecks and disable them in the 'submit' IOCTL drm/tegra: Check for malformed offsets and sizes in the 'submit' IOCTL drm/tegra: Add driver documentation gpu: host1x: Flesh out kerneldoc
Diffstat (limited to 'drivers/gpu/host1x')
-rw-r--r--drivers/gpu/host1x/bus.c75
-rw-r--r--drivers/gpu/host1x/cdma.h1
-rw-r--r--drivers/gpu/host1x/channel.c147
-rw-r--r--drivers/gpu/host1x/channel.h21
-rw-r--r--drivers/gpu/host1x/debug.c47
-rw-r--r--drivers/gpu/host1x/dev.c7
-rw-r--r--drivers/gpu/host1x/dev.h6
-rw-r--r--drivers/gpu/host1x/hw/channel_hw.c4
-rw-r--r--drivers/gpu/host1x/job.c124
-rw-r--r--drivers/gpu/host1x/job.h14
-rw-r--r--drivers/gpu/host1x/syncpt.c81
11 files changed, 372 insertions, 155 deletions
diff --git a/drivers/gpu/host1x/bus.c b/drivers/gpu/host1x/bus.c
index 561831e1ae2c..a048e3ac523d 100644
--- a/drivers/gpu/host1x/bus.c
+++ b/drivers/gpu/host1x/bus.c
@@ -40,6 +40,9 @@ struct host1x_subdev {
/**
* host1x_subdev_add() - add a new subdevice with an associated device node
+ * @device: host1x device to add the subdevice to
+ * @driver: host1x driver
+ * @np: device node
*/
static int host1x_subdev_add(struct host1x_device *device,
struct device_node *np)
@@ -62,6 +65,7 @@ static int host1x_subdev_add(struct host1x_device *device,
/**
* host1x_subdev_del() - remove subdevice
+ * @subdev: subdevice to remove
*/
static void host1x_subdev_del(struct host1x_subdev *subdev)
{
@@ -72,6 +76,8 @@ static void host1x_subdev_del(struct host1x_subdev *subdev)
/**
* host1x_device_parse_dt() - scan device tree and add matching subdevices
+ * @device: host1x logical device
+ * @driver: host1x driver
*/
static int host1x_device_parse_dt(struct host1x_device *device,
struct host1x_driver *driver)
@@ -166,6 +172,16 @@ static void host1x_subdev_unregister(struct host1x_device *device,
mutex_unlock(&device->subdevs_lock);
}
+/**
+ * host1x_device_init() - initialize a host1x logical device
+ * @device: host1x logical device
+ *
+ * The driver for the host1x logical device can call this during execution of
+ * its &host1x_driver.probe implementation to initialize each of its clients.
+ * The client drivers access the subsystem specific driver data using the
+ * &host1x_client.parent field and driver data associated with it (usually by
+ * calling dev_get_drvdata()).
+ */
int host1x_device_init(struct host1x_device *device)
{
struct host1x_client *client;
@@ -192,6 +208,15 @@ int host1x_device_init(struct host1x_device *device)
}
EXPORT_SYMBOL(host1x_device_init);
+/**
+ * host1x_device_exit() - uninitialize host1x logical device
+ * @device: host1x logical device
+ *
+ * When the driver for a host1x logical device is unloaded, it can call this
+ * function to tear down each of its clients. Typically this is done after a
+ * subsystem-specific data structure is removed and the functionality can no
+ * longer be used.
+ */
int host1x_device_exit(struct host1x_device *device)
{
struct host1x_client *client;
@@ -446,6 +471,14 @@ static void host1x_detach_driver(struct host1x *host1x,
mutex_unlock(&host1x->devices_lock);
}
+/**
+ * host1x_register() - register a host1x controller
+ * @host1x: host1x controller
+ *
+ * The host1x controller driver uses this to register a host1x controller with
+ * the infrastructure. Note that all Tegra SoC generations have only ever come
+ * with a single host1x instance, so this function is somewhat academic.
+ */
int host1x_register(struct host1x *host1x)
{
struct host1x_driver *driver;
@@ -464,6 +497,13 @@ int host1x_register(struct host1x *host1x)
return 0;
}
+/**
+ * host1x_unregister() - unregister a host1x controller
+ * @host1x: host1x controller
+ *
+ * The host1x controller driver uses this to remove a host1x controller from
+ * the infrastructure.
+ */
int host1x_unregister(struct host1x *host1x)
{
struct host1x_driver *driver;
@@ -513,6 +553,16 @@ static void host1x_device_shutdown(struct device *dev)
driver->shutdown(device);
}
+/**
+ * host1x_driver_register_full() - register a host1x driver
+ * @driver: host1x driver
+ * @owner: owner module
+ *
+ * Drivers for host1x logical devices call this function to register a driver
+ * with the infrastructure. Note that since these drive logical devices, the
+ * registration of the driver actually triggers tho logical device creation.
+ * A logical device will be created for each host1x instance.
+ */
int host1x_driver_register_full(struct host1x_driver *driver,
struct module *owner)
{
@@ -541,6 +591,13 @@ int host1x_driver_register_full(struct host1x_driver *driver,
}
EXPORT_SYMBOL(host1x_driver_register_full);
+/**
+ * host1x_driver_unregister() - unregister a host1x driver
+ * @driver: host1x driver
+ *
+ * Unbinds the driver from each of the host1x logical devices that it is
+ * bound to, effectively removing the subsystem devices that they represent.
+ */
void host1x_driver_unregister(struct host1x_driver *driver)
{
driver_unregister(&driver->driver);
@@ -551,6 +608,17 @@ void host1x_driver_unregister(struct host1x_driver *driver)
}
EXPORT_SYMBOL(host1x_driver_unregister);
+/**
+ * host1x_client_register() - register a host1x client
+ * @client: host1x client
+ *
+ * Registers a host1x client with each host1x controller instance. Note that
+ * each client will only match their parent host1x controller and will only be
+ * associated with that instance. Once all clients have been registered with
+ * their parent host1x controller, the infrastructure will set up the logical
+ * device and call host1x_device_init(), which will in turn call each client's
+ * &host1x_client_ops.init implementation.
+ */
int host1x_client_register(struct host1x_client *client)
{
struct host1x *host1x;
@@ -576,6 +644,13 @@ int host1x_client_register(struct host1x_client *client)
}
EXPORT_SYMBOL(host1x_client_register);
+/**
+ * host1x_client_unregister() - unregister a host1x client
+ * @client: host1x client
+ *
+ * Removes a host1x client from its host1x controller instance. If a logical
+ * device has already been initialized, it will be torn down.
+ */
int host1x_client_unregister(struct host1x_client *client)
{
struct host1x_client *c;
diff --git a/drivers/gpu/host1x/cdma.h b/drivers/gpu/host1x/cdma.h
index ec170a78f4e1..286d49386be9 100644
--- a/drivers/gpu/host1x/cdma.h
+++ b/drivers/gpu/host1x/cdma.h
@@ -88,7 +88,6 @@ struct host1x_cdma {
int host1x_cdma_init(struct host1x_cdma *cdma);
int host1x_cdma_deinit(struct host1x_cdma *cdma);
-void host1x_cdma_stop(struct host1x_cdma *cdma);
int host1x_cdma_begin(struct host1x_cdma *cdma, struct host1x_job *job);
void host1x_cdma_push(struct host1x_cdma *cdma, u32 op1, u32 op2);
void host1x_cdma_end(struct host1x_cdma *cdma, struct host1x_job *job);
diff --git a/drivers/gpu/host1x/channel.c b/drivers/gpu/host1x/channel.c
index 8f437d924c10..db9b91d1384c 100644
--- a/drivers/gpu/host1x/channel.c
+++ b/drivers/gpu/host1x/channel.c
@@ -24,19 +24,33 @@
#include "job.h"
/* Constructor for the host1x device list */
-int host1x_channel_list_init(struct host1x *host)
+int host1x_channel_list_init(struct host1x_channel_list *chlist,
+ unsigned int num_channels)
{
- INIT_LIST_HEAD(&host->chlist.list);
- mutex_init(&host->chlist_mutex);
-
- if (host->info->nb_channels > BITS_PER_LONG) {
- WARN(1, "host1x hardware has more channels than supported by the driver\n");
- return -ENOSYS;
+ chlist->channels = kcalloc(num_channels, sizeof(struct host1x_channel),
+ GFP_KERNEL);
+ if (!chlist->channels)
+ return -ENOMEM;
+
+ chlist->allocated_channels =
+ kcalloc(BITS_TO_LONGS(num_channels), sizeof(unsigned long),
+ GFP_KERNEL);
+ if (!chlist->allocated_channels) {
+ kfree(chlist->channels);
+ return -ENOMEM;
}
+ bitmap_zero(chlist->allocated_channels, num_channels);
+
return 0;
}
+void host1x_channel_list_free(struct host1x_channel_list *chlist)
+{
+ kfree(chlist->allocated_channels);
+ kfree(chlist->channels);
+}
+
int host1x_job_submit(struct host1x_job *job)
{
struct host1x *host = dev_get_drvdata(job->channel->dev->parent);
@@ -47,86 +61,107 @@ EXPORT_SYMBOL(host1x_job_submit);
struct host1x_channel *host1x_channel_get(struct host1x_channel *channel)
{
- int err = 0;
+ kref_get(&channel->refcount);
- mutex_lock(&channel->reflock);
+ return channel;
+}
+EXPORT_SYMBOL(host1x_channel_get);
- if (channel->refcount == 0)
- err = host1x_cdma_init(&channel->cdma);
+/**
+ * host1x_channel_get_index() - Attempt to get channel reference by index
+ * @host: Host1x device object
+ * @index: Index of channel
+ *
+ * If channel number @index is currently allocated, increase its refcount
+ * and return a pointer to it. Otherwise, return NULL.
+ */
+struct host1x_channel *host1x_channel_get_index(struct host1x *host,
+ unsigned int index)
+{
+ struct host1x_channel *ch = &host->channel_list.channels[index];
- if (!err)
- channel->refcount++;
+ if (!kref_get_unless_zero(&ch->refcount))
+ return NULL;
- mutex_unlock(&channel->reflock);
+ return ch;
+}
+
+static void release_channel(struct kref *kref)
+{
+ struct host1x_channel *channel =
+ container_of(kref, struct host1x_channel, refcount);
+ struct host1x *host = dev_get_drvdata(channel->dev->parent);
+ struct host1x_channel_list *chlist = &host->channel_list;
+
+ host1x_hw_cdma_stop(host, &channel->cdma);
+ host1x_cdma_deinit(&channel->cdma);
- return err ? NULL : channel;
+ clear_bit(channel->id, chlist->allocated_channels);
}
-EXPORT_SYMBOL(host1x_channel_get);
void host1x_channel_put(struct host1x_channel *channel)
{
- mutex_lock(&channel->reflock);
+ kref_put(&channel->refcount, release_channel);
+}
+EXPORT_SYMBOL(host1x_channel_put);
- if (channel->refcount == 1) {
- struct host1x *host = dev_get_drvdata(channel->dev->parent);
+static struct host1x_channel *acquire_unused_channel(struct host1x *host)
+{
+ struct host1x_channel_list *chlist = &host->channel_list;
+ unsigned int max_channels = host->info->nb_channels;
+ unsigned int index;
- host1x_hw_cdma_stop(host, &channel->cdma);
- host1x_cdma_deinit(&channel->cdma);
+ index = find_first_zero_bit(chlist->allocated_channels, max_channels);
+ if (index >= max_channels) {
+ dev_err(host->dev, "failed to find free channel\n");
+ return NULL;
}
- channel->refcount--;
+ chlist->channels[index].id = index;
- mutex_unlock(&channel->reflock);
+ set_bit(index, chlist->allocated_channels);
+
+ return &chlist->channels[index];
}
-EXPORT_SYMBOL(host1x_channel_put);
+/**
+ * host1x_channel_request() - Allocate a channel
+ * @device: Host1x unit this channel will be used to send commands to
+ *
+ * Allocates a new host1x channel for @device. If there are no free channels,
+ * this will sleep until one becomes available. May return NULL if CDMA
+ * initialization fails.
+ */
struct host1x_channel *host1x_channel_request(struct device *dev)
{
struct host1x *host = dev_get_drvdata(dev->parent);
- unsigned int max_channels = host->info->nb_channels;
- struct host1x_channel *channel = NULL;
- unsigned long index;
+ struct host1x_channel_list *chlist = &host->channel_list;
+ struct host1x_channel *channel;
int err;
- mutex_lock(&host->chlist_mutex);
+ channel = acquire_unused_channel(host);
+ if (!channel)
+ return NULL;
- index = find_first_zero_bit(&host->allocated_channels, max_channels);
- if (index >= max_channels)
- goto fail;
+ kref_init(&channel->refcount);
+ mutex_init(&channel->submitlock);
+ channel->dev = dev;
- channel = kzalloc(sizeof(*channel), GFP_KERNEL);
- if (!channel)
+ err = host1x_hw_channel_init(host, channel, channel->id);
+ if (err < 0)
goto fail;
- err = host1x_hw_channel_init(host, channel, index);
+ err = host1x_cdma_init(&channel->cdma);
if (err < 0)
goto fail;
- /* Link device to host1x_channel */
- channel->dev = dev;
-
- /* Add to channel list */
- list_add_tail(&channel->list, &host->chlist.list);
-
- host->allocated_channels |= BIT(index);
-
- mutex_unlock(&host->chlist_mutex);
return channel;
fail:
- dev_err(dev, "failed to init channel\n");
- kfree(channel);
- mutex_unlock(&host->chlist_mutex);
- return NULL;
-}
-EXPORT_SYMBOL(host1x_channel_request);
+ clear_bit(channel->id, chlist->allocated_channels);
-void host1x_channel_free(struct host1x_channel *channel)
-{
- struct host1x *host = dev_get_drvdata(channel->dev->parent);
+ dev_err(dev, "failed to initialize channel\n");
- host->allocated_channels &= ~BIT(channel->id);
- list_del(&channel->list);
- kfree(channel);
+ return NULL;
}
-EXPORT_SYMBOL(host1x_channel_free);
+EXPORT_SYMBOL(host1x_channel_request);
diff --git a/drivers/gpu/host1x/channel.h b/drivers/gpu/host1x/channel.h
index df767cf90d51..7068e42d42df 100644
--- a/drivers/gpu/host1x/channel.h
+++ b/drivers/gpu/host1x/channel.h
@@ -20,17 +20,21 @@
#define __HOST1X_CHANNEL_H
#include <linux/io.h>
+#include <linux/kref.h>
#include "cdma.h"
struct host1x;
+struct host1x_channel;
-struct host1x_channel {
- struct list_head list;
+struct host1x_channel_list {
+ struct host1x_channel *channels;
+ unsigned long *allocated_channels;
+};
- unsigned int refcount;
+struct host1x_channel {
+ struct kref refcount;
unsigned int id;
- struct mutex reflock;
struct mutex submitlock;
void __iomem *regs;
struct device *dev;
@@ -38,9 +42,10 @@ struct host1x_channel {
};
/* channel list operations */
-int host1x_channel_list_init(struct host1x *host);
-
-#define host1x_for_each_channel(host, channel) \
- list_for_each_entry(channel, &host->chlist.list, list)
+int host1x_channel_list_init(struct host1x_channel_list *chlist,
+ unsigned int num_channels);
+void host1x_channel_list_free(struct host1x_channel_list *chlist);
+struct host1x_channel *host1x_channel_get_index(struct host1x *host,
+ unsigned int index);
#endif
diff --git a/drivers/gpu/host1x/debug.c b/drivers/gpu/host1x/debug.c
index d9330fcc62ad..2aae0e63214c 100644
--- a/drivers/gpu/host1x/debug.c
+++ b/drivers/gpu/host1x/debug.c
@@ -43,24 +43,19 @@ void host1x_debug_output(struct output *o, const char *fmt, ...)
o->fn(o->ctx, o->buf, len);
}
-static int show_channels(struct host1x_channel *ch, void *data, bool show_fifo)
+static int show_channel(struct host1x_channel *ch, void *data, bool show_fifo)
{
struct host1x *m = dev_get_drvdata(ch->dev->parent);
struct output *o = data;
- mutex_lock(&ch->reflock);
+ mutex_lock(&ch->cdma.lock);
- if (ch->refcount) {
- mutex_lock(&ch->cdma.lock);
+ if (show_fifo)
+ host1x_hw_show_channel_fifo(m, ch, o);
- if (show_fifo)
- host1x_hw_show_channel_fifo(m, ch, o);
+ host1x_hw_show_channel_cdma(m, ch, o);
- host1x_hw_show_channel_cdma(m, ch, o);
- mutex_unlock(&ch->cdma.lock);
- }
-
- mutex_unlock(&ch->reflock);
+ mutex_unlock(&ch->cdma.lock);
return 0;
}
@@ -94,28 +89,22 @@ static void show_syncpts(struct host1x *m, struct output *o)
host1x_debug_output(o, "\n");
}
-static void show_all(struct host1x *m, struct output *o)
+static void show_all(struct host1x *m, struct output *o, bool show_fifo)
{
- struct host1x_channel *ch;
+ int i;
host1x_hw_show_mlocks(m, o);
show_syncpts(m, o);
host1x_debug_output(o, "---- channels ----\n");
- host1x_for_each_channel(m, ch)
- show_channels(ch, o, true);
-}
-
-static void show_all_no_fifo(struct host1x *host1x, struct output *o)
-{
- struct host1x_channel *ch;
-
- host1x_hw_show_mlocks(host1x, o);
- show_syncpts(host1x, o);
- host1x_debug_output(o, "---- channels ----\n");
+ for (i = 0; i < m->info->nb_channels; ++i) {
+ struct host1x_channel *ch = host1x_channel_get_index(m, i);
- host1x_for_each_channel(host1x, ch)
- show_channels(ch, o, false);
+ if (ch) {
+ show_channel(ch, o, show_fifo);
+ host1x_channel_put(ch);
+ }
+ }
}
static int host1x_debug_show_all(struct seq_file *s, void *unused)
@@ -125,7 +114,7 @@ static int host1x_debug_show_all(struct seq_file *s, void *unused)
.ctx = s
};
- show_all(s->private, &o);
+ show_all(s->private, &o, true);
return 0;
}
@@ -137,7 +126,7 @@ static int host1x_debug_show(struct seq_file *s, void *unused)
.ctx = s
};
- show_all_no_fifo(s->private, &o);
+ show_all(s->private, &o, false);
return 0;
}
@@ -216,7 +205,7 @@ void host1x_debug_dump(struct host1x *host1x)
.fn = write_to_printk
};
- show_all(host1x, &o);
+ show_all(host1x, &o, true);
}
void host1x_debug_dump_syncpts(struct host1x *host1x)
diff --git a/drivers/gpu/host1x/dev.c b/drivers/gpu/host1x/dev.c
index f05ebb14fa63..5c1c711a21af 100644
--- a/drivers/gpu/host1x/dev.c
+++ b/drivers/gpu/host1x/dev.c
@@ -198,7 +198,8 @@ static int host1x_probe(struct platform_device *pdev)
host->iova_end = geometry->aperture_end;
}
- err = host1x_channel_list_init(host);
+ err = host1x_channel_list_init(&host->channel_list,
+ host->info->nb_channels);
if (err) {
dev_err(&pdev->dev, "failed to initialize channel list\n");
goto fail_detach_device;
@@ -207,7 +208,7 @@ static int host1x_probe(struct platform_device *pdev)
err = clk_prepare_enable(host->clk);
if (err < 0) {
dev_err(&pdev->dev, "failed to enable clock\n");
- goto fail_detach_device;
+ goto fail_free_channels;
}
err = reset_control_deassert(host->rst);
@@ -244,6 +245,8 @@ fail_reset_assert:
reset_control_assert(host->rst);
fail_unprepare_disable:
clk_disable_unprepare(host->clk);
+fail_free_channels:
+ host1x_channel_list_free(&host->channel_list);
fail_detach_device:
if (host->domain) {
put_iova_domain(&host->iova);
diff --git a/drivers/gpu/host1x/dev.h b/drivers/gpu/host1x/dev.h
index 229d08b6a45e..ffdbc15b749b 100644
--- a/drivers/gpu/host1x/dev.h
+++ b/drivers/gpu/host1x/dev.h
@@ -129,10 +129,8 @@ struct host1x {
struct host1x_syncpt *nop_sp;
struct mutex syncpt_mutex;
- struct mutex chlist_mutex;
- struct host1x_channel chlist;
- unsigned long allocated_channels;
- unsigned int num_allocated_channels;
+
+ struct host1x_channel_list channel_list;
struct dentry *debugfs;
diff --git a/drivers/gpu/host1x/hw/channel_hw.c b/drivers/gpu/host1x/hw/channel_hw.c
index 5e8df78b7acd..8447a56c41ca 100644
--- a/drivers/gpu/host1x/hw/channel_hw.c
+++ b/drivers/gpu/host1x/hw/channel_hw.c
@@ -181,10 +181,6 @@ error:
static int host1x_channel_init(struct host1x_channel *ch, struct host1x *dev,
unsigned int index)
{
- ch->id = index;
- mutex_init(&ch->reflock);
- mutex_init(&ch->submitlock);
-
ch->regs = dev->regs + index * HOST1X_CHANNEL_SIZE;
return 0;
}
diff --git a/drivers/gpu/host1x/job.c b/drivers/gpu/host1x/job.c
index 5f5f8ee6143d..bee504406cfc 100644
--- a/drivers/gpu/host1x/job.c
+++ b/drivers/gpu/host1x/job.c
@@ -31,6 +31,8 @@
#include "job.h"
#include "syncpt.h"
+#define HOST1X_WAIT_SYNCPT_OFFSET 0x8
+
struct host1x_job *host1x_job_alloc(struct host1x_channel *ch,
u32 num_cmdbufs, u32 num_relocs,
u32 num_waitchks)
@@ -137,8 +139,9 @@ static void host1x_syncpt_patch_offset(struct host1x_syncpt *sp,
* avoid a wrap condition in the HW).
*/
static int do_waitchks(struct host1x_job *job, struct host1x *host,
- struct host1x_bo *patch)
+ struct host1x_job_gather *g)
{
+ struct host1x_bo *patch = g->bo;
int i;
/* compare syncpt vs wait threshold */
@@ -165,7 +168,8 @@ static int do_waitchks(struct host1x_job *job, struct host1x *host,
wait->syncpt_id, sp->name, wait->thresh,
host1x_syncpt_read_min(sp));
- host1x_syncpt_patch_offset(sp, patch, wait->offset);
+ host1x_syncpt_patch_offset(sp, patch,
+ g->offset + wait->offset);
}
wait->bo = NULL;
@@ -269,11 +273,12 @@ unpin:
return err;
}
-static int do_relocs(struct host1x_job *job, struct host1x_bo *cmdbuf)
+static int do_relocs(struct host1x_job *job, struct host1x_job_gather *g)
{
int i = 0;
u32 last_page = ~0;
void *cmdbuf_page_addr = NULL;
+ struct host1x_bo *cmdbuf = g->bo;
/* pin & patch the relocs for one gather */
for (i = 0; i < job->num_relocs; i++) {
@@ -286,6 +291,13 @@ static int do_relocs(struct host1x_job *job, struct host1x_bo *cmdbuf)
if (cmdbuf != reloc->cmdbuf.bo)
continue;
+ if (IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL)) {
+ target = (u32 *)job->gather_copy_mapped +
+ reloc->cmdbuf.offset / sizeof(u32) +
+ g->offset / sizeof(u32);
+ goto patch_reloc;
+ }
+
if (last_page != reloc->cmdbuf.offset >> PAGE_SHIFT) {
if (cmdbuf_page_addr)
host1x_bo_kunmap(cmdbuf, last_page,
@@ -302,6 +314,7 @@ static int do_relocs(struct host1x_job *job, struct host1x_bo *cmdbuf)
}
target = cmdbuf_page_addr + (reloc->cmdbuf.offset & ~PAGE_MASK);
+patch_reloc:
*target = reloc_addr;
}
@@ -319,6 +332,21 @@ static bool check_reloc(struct host1x_reloc *reloc, struct host1x_bo *cmdbuf,
if (reloc->cmdbuf.bo != cmdbuf || reloc->cmdbuf.offset != offset)
return false;
+ /* relocation shift value validation isn't implemented yet */
+ if (reloc->shift)
+ return false;
+
+ return true;
+}
+
+static bool check_wait(struct host1x_waitchk *wait, struct host1x_bo *cmdbuf,
+ unsigned int offset)
+{
+ offset *= sizeof(u32);
+
+ if (wait->bo != cmdbuf || wait->offset != offset)
+ return false;
+
return true;
}
@@ -329,6 +357,9 @@ struct host1x_firewall {
unsigned int num_relocs;
struct host1x_reloc *reloc;
+ unsigned int num_waitchks;
+ struct host1x_waitchk *waitchk;
+
struct host1x_bo *cmdbuf;
unsigned int offset;
@@ -341,6 +372,9 @@ struct host1x_firewall {
static int check_register(struct host1x_firewall *fw, unsigned long offset)
{
+ if (!fw->job->is_addr_reg)
+ return 0;
+
if (fw->job->is_addr_reg(fw->dev, fw->class, offset)) {
if (!fw->num_relocs)
return -EINVAL;
@@ -352,6 +386,33 @@ static int check_register(struct host1x_firewall *fw, unsigned long offset)
fw->reloc++;
}
+ if (offset == HOST1X_WAIT_SYNCPT_OFFSET) {
+ if (fw->class != HOST1X_CLASS_HOST1X)
+ return -EINVAL;
+
+ if (!fw->num_waitchks)
+ return -EINVAL;
+
+ if (!check_wait(fw->waitchk, fw->cmdbuf, fw->offset))
+ return -EINVAL;
+
+ fw->num_waitchks--;
+ fw->waitchk++;
+ }
+
+ return 0;
+}
+
+static int check_class(struct host1x_firewall *fw, u32 class)
+{
+ if (!fw->job->is_valid_class) {
+ if (fw->class != class)
+ return -EINVAL;
+ } else {
+ if (!fw->job->is_valid_class(fw->class))
+ return -EINVAL;
+ }
+
return 0;
}
@@ -428,11 +489,9 @@ static int validate(struct host1x_firewall *fw, struct host1x_job_gather *g)
{
u32 *cmdbuf_base = (u32 *)fw->job->gather_copy_mapped +
(g->offset / sizeof(u32));
+ u32 job_class = fw->class;
int err = 0;
- if (!fw->job->is_addr_reg)
- return 0;
-
fw->words = g->words;
fw->cmdbuf = g->bo;
fw->offset = 0;
@@ -452,7 +511,9 @@ static int validate(struct host1x_firewall *fw, struct host1x_job_gather *g)
fw->class = word >> 6 & 0x3ff;
fw->mask = word & 0x3f;
fw->reg = word >> 16 & 0xfff;
- err = check_mask(fw);
+ err = check_class(fw, job_class);
+ if (!err)
+ err = check_mask(fw);
if (err)
goto out;
break;
@@ -480,7 +541,6 @@ static int validate(struct host1x_firewall *fw, struct host1x_job_gather *g)
goto out;
break;
case 4:
- case 5:
case 14:
break;
default:
@@ -504,7 +564,9 @@ static inline int copy_gathers(struct host1x_job *job, struct device *dev)
fw.dev = dev;
fw.reloc = job->relocarray;
fw.num_relocs = job->num_relocs;
- fw.class = 0;
+ fw.waitchk = job->waitchk;
+ fw.num_waitchks = job->num_waitchk;
+ fw.class = job->class;
for (i = 0; i < job->num_gathers; i++) {
struct host1x_job_gather *g = &job->gathers[i];
@@ -512,12 +574,20 @@ static inline int copy_gathers(struct host1x_job *job, struct device *dev)
size += g->words * sizeof(u32);
}
+ /*
+ * Try a non-blocking allocation from a higher priority pools first,
+ * as awaiting for the allocation here is a major performance hit.
+ */
job->gather_copy_mapped = dma_alloc_wc(dev, size, &job->gather_copy,
- GFP_KERNEL);
- if (!job->gather_copy_mapped) {
- job->gather_copy_mapped = NULL;
+ GFP_NOWAIT);
+
+ /* the higher priority allocation failed, try the generic-blocking */
+ if (!job->gather_copy_mapped)
+ job->gather_copy_mapped = dma_alloc_wc(dev, size,
+ &job->gather_copy,
+ GFP_KERNEL);
+ if (!job->gather_copy_mapped)
return -ENOMEM;
- }
job->gather_copy_size = size;
@@ -542,8 +612,8 @@ static inline int copy_gathers(struct host1x_job *job, struct device *dev)
offset += g->words * sizeof(u32);
}
- /* No relocs should remain at this point */
- if (fw.num_relocs)
+ /* No relocs and waitchks should remain at this point */
+ if (fw.num_relocs || fw.num_waitchks)
return -EINVAL;
return 0;
@@ -573,6 +643,12 @@ int host1x_job_pin(struct host1x_job *job, struct device *dev)
if (err)
goto out;
+ if (IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL)) {
+ err = copy_gathers(job, dev);
+ if (err)
+ goto out;
+ }
+
/* patch gathers */
for (i = 0; i < job->num_gathers; i++) {
struct host1x_job_gather *g = &job->gathers[i];
@@ -581,7 +657,9 @@ int host1x_job_pin(struct host1x_job *job, struct device *dev)
if (g->handled)
continue;
- g->base = job->gather_addr_phys[i];
+ /* copy_gathers() sets gathers base if firewall is enabled */
+ if (!IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL))
+ g->base = job->gather_addr_phys[i];
for (j = i + 1; j < job->num_gathers; j++) {
if (job->gathers[j].bo == g->bo) {
@@ -590,24 +668,18 @@ int host1x_job_pin(struct host1x_job *job, struct device *dev)
}
}
- err = do_relocs(job, g->bo);
+ err = do_relocs(job, g);
if (err)
break;
- err = do_waitchks(job, host, g->bo);
+ err = do_waitchks(job, host, g);
if (err)
break;
}
- if (IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL) && !err) {
- err = copy_gathers(job, dev);
- if (err) {
- host1x_job_unpin(job);
- return err;
- }
- }
-
out:
+ if (err)
+ host1x_job_unpin(job);
wmb();
return err;
diff --git a/drivers/gpu/host1x/job.h b/drivers/gpu/host1x/job.h
index 878239c476d2..4bda51d503ec 100644
--- a/drivers/gpu/host1x/job.h
+++ b/drivers/gpu/host1x/job.h
@@ -27,20 +27,6 @@ struct host1x_job_gather {
bool handled;
};
-struct host1x_cmdbuf {
- u32 handle;
- u32 offset;
- u32 words;
- u32 pad;
-};
-
-struct host1x_waitchk {
- struct host1x_bo *bo;
- u32 offset;
- u32 syncpt_id;
- u32 thresh;
-};
-
struct host1x_job_unpin_data {
struct host1x_bo *bo;
struct sg_table *sgt;
diff --git a/drivers/gpu/host1x/syncpt.c b/drivers/gpu/host1x/syncpt.c
index 0ac026cdc30c..048ac9e344ce 100644
--- a/drivers/gpu/host1x/syncpt.c
+++ b/drivers/gpu/host1x/syncpt.c
@@ -99,14 +99,24 @@ unlock:
return NULL;
}
+/**
+ * host1x_syncpt_id() - retrieve syncpoint ID
+ * @sp: host1x syncpoint
+ *
+ * Given a pointer to a struct host1x_syncpt, retrieves its ID. This ID is
+ * often used as a value to program into registers that control how hardware
+ * blocks interact with syncpoints.
+ */
u32 host1x_syncpt_id(struct host1x_syncpt *sp)
{
return sp->id;
}
EXPORT_SYMBOL(host1x_syncpt_id);
-/*
- * Updates the value sent to hardware.
+/**
+ * host1x_syncpt_incr_max() - update the value sent to hardware
+ * @sp: host1x syncpoint
+ * @incrs: number of increments
*/
u32 host1x_syncpt_incr_max(struct host1x_syncpt *sp, u32 incrs)
{
@@ -175,8 +185,9 @@ u32 host1x_syncpt_load_wait_base(struct host1x_syncpt *sp)
return sp->base_val;
}
-/*
- * Increment syncpoint value from cpu, updating cache
+/**
+ * host1x_syncpt_incr() - increment syncpoint value from CPU, updating cache
+ * @sp: host1x syncpoint
*/
int host1x_syncpt_incr(struct host1x_syncpt *sp)
{
@@ -195,8 +206,12 @@ static bool syncpt_load_min_is_expired(struct host1x_syncpt *sp, u32 thresh)
return host1x_syncpt_is_expired(sp, thresh);
}
-/*
- * Main entrypoint for syncpoint value waits.
+/**
+ * host1x_syncpt_wait() - wait for a syncpoint to reach a given value
+ * @sp: host1x syncpoint
+ * @thresh: threshold
+ * @timeout: maximum time to wait for the syncpoint to reach the given value
+ * @value: return location for the syncpoint value
*/
int host1x_syncpt_wait(struct host1x_syncpt *sp, u32 thresh, long timeout,
u32 *value)
@@ -402,6 +417,16 @@ int host1x_syncpt_init(struct host1x *host)
return 0;
}
+/**
+ * host1x_syncpt_request() - request a syncpoint
+ * @dev: device requesting the syncpoint
+ * @flags: flags
+ *
+ * host1x client drivers can use this function to allocate a syncpoint for
+ * subsequent use. A syncpoint returned by this function will be reserved for
+ * use by the client exclusively. When no longer using a syncpoint, a host1x
+ * client driver needs to release it using host1x_syncpt_free().
+ */
struct host1x_syncpt *host1x_syncpt_request(struct device *dev,
unsigned long flags)
{
@@ -411,6 +436,16 @@ struct host1x_syncpt *host1x_syncpt_request(struct device *dev,
}
EXPORT_SYMBOL(host1x_syncpt_request);
+/**
+ * host1x_syncpt_free() - free a requested syncpoint
+ * @sp: host1x syncpoint
+ *
+ * Release a syncpoint previously allocated using host1x_syncpt_request(). A
+ * host1x client driver should call this when the syncpoint is no longer in
+ * use. Note that client drivers must ensure that the syncpoint doesn't remain
+ * under the control of hardware after calling this function, otherwise two
+ * clients may end up trying to access the same syncpoint concurrently.
+ */
void host1x_syncpt_free(struct host1x_syncpt *sp)
{
if (!sp)
@@ -438,9 +473,12 @@ void host1x_syncpt_deinit(struct host1x *host)
kfree(sp->name);
}
-/*
- * Read max. It indicates how many operations there are in queue, either in
- * channel or in a software thread.
+/**
+ * host1x_syncpt_read_max() - read maximum syncpoint value
+ * @sp: host1x syncpoint
+ *
+ * The maximum syncpoint value indicates how many operations there are in
+ * queue, either in channel or in a software thread.
*/
u32 host1x_syncpt_read_max(struct host1x_syncpt *sp)
{
@@ -450,8 +488,12 @@ u32 host1x_syncpt_read_max(struct host1x_syncpt *sp)
}
EXPORT_SYMBOL(host1x_syncpt_read_max);
-/*
- * Read min, which is a shadow of the current sync point value in hardware.
+/**
+ * host1x_syncpt_read_min() - read minimum syncpoint value
+ * @sp: host1x syncpoint
+ *
+ * The minimum syncpoint value is a shadow of the current sync point value in
+ * hardware.
*/
u32 host1x_syncpt_read_min(struct host1x_syncpt *sp)
{
@@ -461,6 +503,10 @@ u32 host1x_syncpt_read_min(struct host1x_syncpt *sp)
}
EXPORT_SYMBOL(host1x_syncpt_read_min);
+/**
+ * host1x_syncpt_read() - read the current syncpoint value
+ * @sp: host1x syncpoint
+ */
u32 host1x_syncpt_read(struct host1x_syncpt *sp)
{
return host1x_syncpt_load(sp);
@@ -482,6 +528,11 @@ unsigned int host1x_syncpt_nb_mlocks(struct host1x *host)
return host->info->nb_mlocks;
}
+/**
+ * host1x_syncpt_get() - obtain a syncpoint by ID
+ * @host: host1x controller
+ * @id: syncpoint ID
+ */
struct host1x_syncpt *host1x_syncpt_get(struct host1x *host, unsigned int id)
{
if (id >= host->info->nb_pts)
@@ -491,12 +542,20 @@ struct host1x_syncpt *host1x_syncpt_get(struct host1x *host, unsigned int id)
}
EXPORT_SYMBOL(host1x_syncpt_get);
+/**
+ * host1x_syncpt_get_base() - obtain the wait base associated with a syncpoint
+ * @sp: host1x syncpoint
+ */
struct host1x_syncpt_base *host1x_syncpt_get_base(struct host1x_syncpt *sp)
{
return sp ? sp->base : NULL;
}
EXPORT_SYMBOL(host1x_syncpt_get_base);
+/**
+ * host1x_syncpt_base_id() - retrieve the ID of a syncpoint wait base
+ * @base: host1x syncpoint wait base
+ */
u32 host1x_syncpt_base_id(struct host1x_syncpt_base *base)
{
return base->id;