diff options
| author | Mikko Perttunen <mperttunen@nvidia.com> | 2017-09-28 14:50:39 +0200 |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2017-10-20 14:19:52 +0200 |
| commit | c3f52220f276504dea5615cc78750ddc9f468389 (patch) | |
| tree | 678205dfba02670263243686112a7da609fc2e5c /drivers/gpu/host1x/hw | |
| parent | gpu: host1x: Call of_dma_configure() after setting bus (diff) | |
| download | linux-c3f52220f276504dea5615cc78750ddc9f468389.tar.xz linux-c3f52220f276504dea5615cc78750ddc9f468389.zip | |
gpu: host1x: Enable Tegra186 syncpoint protection
Since Tegra186 the Host1x hardware allows syncpoints to be assigned to
specific channels, preventing any other channels from incrementing
them.
Enable this feature where available and assign syncpoints to channels
when submitting a job. Syncpoints are currently never unassigned from
channels since that would require extra work and is unnecessary with
the current channel allocation model.
Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'drivers/gpu/host1x/hw')
| -rw-r--r-- | drivers/gpu/host1x/hw/channel_hw.c | 2 | ||||
| -rw-r--r-- | drivers/gpu/host1x/hw/syncpt_hw.c | 46 |
2 files changed, 48 insertions, 0 deletions
diff --git a/drivers/gpu/host1x/hw/channel_hw.c b/drivers/gpu/host1x/hw/channel_hw.c index 8447a56c41ca..1d3e9bdde2ce 100644 --- a/drivers/gpu/host1x/hw/channel_hw.c +++ b/drivers/gpu/host1x/hw/channel_hw.c @@ -147,6 +147,8 @@ static int channel_submit(struct host1x_job *job) syncval = host1x_syncpt_incr_max(sp, user_syncpt_incrs); + host1x_hw_syncpt_assign_to_channel(host, sp, ch); + job->syncpt_end = syncval; /* add a setclass for modules that require it */ diff --git a/drivers/gpu/host1x/hw/syncpt_hw.c b/drivers/gpu/host1x/hw/syncpt_hw.c index 7b0270d60742..7dfd47d74f89 100644 --- a/drivers/gpu/host1x/hw/syncpt_hw.c +++ b/drivers/gpu/host1x/hw/syncpt_hw.c @@ -106,6 +106,50 @@ static int syncpt_patch_wait(struct host1x_syncpt *sp, void *patch_addr) return 0; } +/** + * syncpt_assign_to_channel() - Assign syncpoint to channel + * @sp: syncpoint + * @ch: channel + * + * On chips with the syncpoint protection feature (Tegra186+), assign @sp to + * @ch, preventing other channels from incrementing the syncpoints. If @ch is + * NULL, unassigns the syncpoint. + * + * On older chips, do nothing. + */ +static void syncpt_assign_to_channel(struct host1x_syncpt *sp, + struct host1x_channel *ch) +{ +#if HOST1X_HW >= 6 + struct host1x *host = sp->host; + + if (!host->hv_regs) + return; + + host1x_sync_writel(host, + HOST1X_SYNC_SYNCPT_CH_APP_CH(ch ? ch->id : 0xff), + HOST1X_SYNC_SYNCPT_CH_APP(sp->id)); +#endif +} + +/** + * syncpt_enable_protection() - Enable syncpoint protection + * @host: host1x instance + * + * On chips with the syncpoint protection feature (Tegra186+), enable this + * feature. On older chips, do nothing. + */ +static void syncpt_enable_protection(struct host1x *host) +{ +#if HOST1X_HW >= 6 + if (!host->hv_regs) + return; + + host1x_hypervisor_writel(host, HOST1X_HV_SYNCPT_PROT_EN_CH_EN, + HOST1X_HV_SYNCPT_PROT_EN); +#endif +} + static const struct host1x_syncpt_ops host1x_syncpt_ops = { .restore = syncpt_restore, .restore_wait_base = syncpt_restore_wait_base, @@ -113,4 +157,6 @@ static const struct host1x_syncpt_ops host1x_syncpt_ops = { .load = syncpt_load, .cpu_incr = syncpt_cpu_incr, .patch_wait = syncpt_patch_wait, + .assign_to_channel = syncpt_assign_to_channel, + .enable_protection = syncpt_enable_protection, }; |