On Wed, 2014-04-16 at 10:41 +0800, Zhao Yakui wrote:
> Based on the hardware spec, the BDW GT3 machine has two independent
> BSD ring that can be used to dispatch the video commands.
> So just initialize it.
>
> Signed-off-by: Zhao Yakui <yakui.zhao@xxxxxxxxx>
A couple of nitpicks below, with or without those:
Reviewed-by: Imre Deak <imre.deak@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/i915_drv.c | 4 +--
> drivers/gpu/drm/i915/i915_drv.h | 2 ++
> drivers/gpu/drm/i915/i915_gem.c | 9 +++++-
> drivers/gpu/drm/i915/i915_gpu_error.c | 1 +
> drivers/gpu/drm/i915/i915_reg.h | 1 +
> drivers/gpu/drm/i915/intel_ringbuffer.c | 54 +++++++++++++++++++++++++++++++
> drivers/gpu/drm/i915/intel_ringbuffer.h | 4 ++-
> 7 files changed, 71 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
> index 17fbbe5..2a7842b 100644
> --- a/drivers/gpu/drm/i915/i915_drv.c
> +++ b/drivers/gpu/drm/i915/i915_drv.c
> @@ -282,7 +282,7 @@ static const struct intel_device_info intel_broadwell_m_info = {
> static const struct intel_device_info intel_broadwell_gt3d_info = {
> .gen = 8, .num_pipes = 3,
> .need_gfx_hws = 1, .has_hotplug = 1,
> - .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING,
> + .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING | BSD2_RING,
> .has_llc = 1,
> .has_ddi = 1,
> .has_fbc = 1,
> @@ -292,7 +292,7 @@ static const struct intel_device_info intel_broadwell_gt3d_info = {
> static const struct intel_device_info intel_broadwell_gt3m_info = {
> .gen = 8, .is_mobile = 1, .num_pipes = 3,
> .need_gfx_hws = 1, .has_hotplug = 1,
> - .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING,
> + .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING | BSD2_RING,
> .has_llc = 1,
> .has_ddi = 1,
> .has_fbc = 1,
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index 92c3095..74aef6a 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -1833,7 +1833,9 @@ struct drm_i915_cmd_table {
> #define BSD_RING (1<<VCS)
> #define BLT_RING (1<<BCS)
> #define VEBOX_RING (1<<VECS)
> +#define BSD2_RING (1<<VCS2)
> #define HAS_BSD(dev) (INTEL_INFO(dev)->ring_mask & BSD_RING)
> +#define HAS_BSD2(dev) (INTEL_INFO(dev)->ring_mask & BSD2_RING)
> #define HAS_BLT(dev) (INTEL_INFO(dev)->ring_mask & BLT_RING)
> #define HAS_VEBOX(dev) (INTEL_INFO(dev)->ring_mask & VEBOX_RING)
> #define HAS_LLC(dev) (INTEL_INFO(dev)->has_llc)
> diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
> index 85c9cf0..b4dcf2a 100644
> --- a/drivers/gpu/drm/i915/i915_gem.c
> +++ b/drivers/gpu/drm/i915/i915_gem.c
> @@ -4374,13 +4374,20 @@ static int i915_gem_init_rings(struct drm_device *dev)
> goto cleanup_blt_ring;
> }
>
> + if (HAS_BSD2(dev)) {
> + ret = intel_init_bsd2_ring_buffer(dev);
> + if (ret)
> + goto cleanup_vebox_ring;
> + }
>
> ret = i915_gem_set_seqno(dev, ((u32)~0 - 0x1000));
> if (ret)
> - goto cleanup_vebox_ring;
> + goto cleanup_ring;
maybe cleanup_bsd2_ring?
>
> return 0;
>
> +cleanup_ring:
> + intel_cleanup_ring_buffer(&dev_priv->ring[VCS2]);
> cleanup_vebox_ring:
> intel_cleanup_ring_buffer(&dev_priv->ring[VECS]);
> cleanup_blt_ring:
> diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
> index 4865ade..3cab7f9 100644
> --- a/drivers/gpu/drm/i915/i915_gpu_error.c
> +++ b/drivers/gpu/drm/i915/i915_gpu_error.c
> @@ -42,6 +42,7 @@ static const char *ring_str(int ring)
> case VCS: return "bsd";
> case BCS: return "blt";
> case VECS: return "vebox";
> + case VCS2: return "second bsd";
"bsd2" would be more concise
> default: return "";
> }
> }
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 8f84555..0b88508 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -760,6 +760,7 @@ enum punit_power_well {
> #define RENDER_RING_BASE 0x02000
> #define BSD_RING_BASE 0x04000
> #define GEN6_BSD_RING_BASE 0x12000
> +#define GEN8_BSD2_RING_BASE 0x1c000
> #define VEBOX_RING_BASE 0x1a000
> #define BLT_RING_BASE 0x22000
> #define RING_TAIL(base) ((base)+0x30)
> diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
> index eb3dd26..8b9b89080 100644
> --- a/drivers/gpu/drm/i915/intel_ringbuffer.c
> +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
> @@ -1924,10 +1924,12 @@ int intel_init_render_ring_buffer(struct drm_device *dev)
> ring->semaphore_register[VCS] = MI_SEMAPHORE_SYNC_RV;
> ring->semaphore_register[BCS] = MI_SEMAPHORE_SYNC_RB;
> ring->semaphore_register[VECS] = MI_SEMAPHORE_SYNC_RVE;
> + ring->semaphore_register[VCS2] = MI_SEMAPHORE_SYNC_INVALID;
It's unclear why we initialize the semaphore stuff differently for VCS
and VCS2. Semaphores are disabled for GEN8 atm and they will be reworked
in the future, but maybe a comment to revisit this code would good here
and in intel_init_bsd2_ring_buffer().
> ring->signal_mbox[RCS] = GEN6_NOSYNC;
> ring->signal_mbox[VCS] = GEN6_VRSYNC;
> ring->signal_mbox[BCS] = GEN6_BRSYNC;
> ring->signal_mbox[VECS] = GEN6_VERSYNC;
> + ring->signal_mbox[VCS2] = GEN6_NOSYNC;
> } else if (IS_GEN5(dev)) {
> ring->add_request = pc_render_add_request;
> ring->flush = gen4_render_ring_flush;
> @@ -2100,10 +2102,12 @@ int intel_init_bsd_ring_buffer(struct drm_device *dev)
> ring->semaphore_register[VCS] = MI_SEMAPHORE_SYNC_INVALID;
> ring->semaphore_register[BCS] = MI_SEMAPHORE_SYNC_VB;
> ring->semaphore_register[VECS] = MI_SEMAPHORE_SYNC_VVE;
> + ring->semaphore_register[VCS2] = MI_SEMAPHORE_SYNC_INVALID;
> ring->signal_mbox[RCS] = GEN6_RVSYNC;
> ring->signal_mbox[VCS] = GEN6_NOSYNC;
> ring->signal_mbox[BCS] = GEN6_BVSYNC;
> ring->signal_mbox[VECS] = GEN6_VEVSYNC;
> + ring->signal_mbox[VCS2] = GEN6_NOSYNC;
> } else {
> ring->mmio_base = BSD_RING_BASE;
> ring->flush = bsd_ring_flush;
> @@ -2126,6 +2130,52 @@ int intel_init_bsd_ring_buffer(struct drm_device *dev)
> return intel_init_ring_buffer(dev, ring);
> }
>
> +/**
> + * Initialize the second BSD ring for Broadwell GT3.
> + * It is noted that this only exists on Broadwell GT3.
> + */
> +int intel_init_bsd2_ring_buffer(struct drm_device *dev)
> +{
> + struct drm_i915_private *dev_priv = dev->dev_private;
> + struct intel_ring_buffer *ring = &dev_priv->ring[VCS2];
> +
> + if ((INTEL_INFO(dev)->gen != 8) ) {
> + DRM_ERROR("No dual-BSD ring on non-BDW machine\n");
> + return -EINVAL;
> + }
> +
> + ring->name = "second bsd ring";
"bsd2 ring" would be more concise
> + ring->id = VCS2;
> +
> + ring->write_tail = ring_write_tail;
> + ring->mmio_base = GEN8_BSD2_RING_BASE;
> + ring->flush = gen6_bsd_ring_flush;
> + ring->add_request = gen6_add_request;
> + ring->get_seqno = gen6_ring_get_seqno;
> + ring->set_seqno = ring_set_seqno;
> + ring->irq_enable_mask =
> + GT_RENDER_USER_INTERRUPT << GEN8_VCS2_IRQ_SHIFT;
> + ring->irq_get = gen8_ring_get_irq;
> + ring->irq_put = gen8_ring_put_irq;
> + ring->dispatch_execbuffer =
> + gen8_ring_dispatch_execbuffer;
> + ring->sync_to = gen6_ring_sync;
> + ring->semaphore_register[RCS] = MI_SEMAPHORE_SYNC_INVALID;
> + ring->semaphore_register[VCS] = MI_SEMAPHORE_SYNC_INVALID;
> + ring->semaphore_register[BCS] = MI_SEMAPHORE_SYNC_INVALID;
> + ring->semaphore_register[VECS] = MI_SEMAPHORE_SYNC_INVALID;
> + ring->semaphore_register[VCS2] = MI_SEMAPHORE_SYNC_INVALID;
> + ring->signal_mbox[RCS] = GEN6_NOSYNC;
> + ring->signal_mbox[VCS] = GEN6_NOSYNC;
> + ring->signal_mbox[BCS] = GEN6_NOSYNC;
> + ring->signal_mbox[VECS] = GEN6_NOSYNC;
> + ring->signal_mbox[VCS2] = GEN6_NOSYNC;
> +
> + ring->init = init_ring_common;
> +
> + return intel_init_ring_buffer(dev, ring);
> +}
> +
> int intel_init_blt_ring_buffer(struct drm_device *dev)
> {
> struct drm_i915_private *dev_priv = dev->dev_private;
> @@ -2157,10 +2207,12 @@ int intel_init_blt_ring_buffer(struct drm_device *dev)
> ring->semaphore_register[VCS] = MI_SEMAPHORE_SYNC_BV;
> ring->semaphore_register[BCS] = MI_SEMAPHORE_SYNC_INVALID;
> ring->semaphore_register[VECS] = MI_SEMAPHORE_SYNC_BVE;
> + ring->semaphore_register[VCS2] = MI_SEMAPHORE_SYNC_INVALID;
> ring->signal_mbox[RCS] = GEN6_RBSYNC;
> ring->signal_mbox[VCS] = GEN6_VBSYNC;
> ring->signal_mbox[BCS] = GEN6_NOSYNC;
> ring->signal_mbox[VECS] = GEN6_VEBSYNC;
> + ring->signal_mbox[VCS2] = GEN6_NOSYNC;
> ring->init = init_ring_common;
>
> return intel_init_ring_buffer(dev, ring);
> @@ -2198,10 +2250,12 @@ int intel_init_vebox_ring_buffer(struct drm_device *dev)
> ring->semaphore_register[VCS] = MI_SEMAPHORE_SYNC_VEV;
> ring->semaphore_register[BCS] = MI_SEMAPHORE_SYNC_VEB;
> ring->semaphore_register[VECS] = MI_SEMAPHORE_SYNC_INVALID;
> + ring->semaphore_register[VCS2] = MI_SEMAPHORE_SYNC_INVALID;
> ring->signal_mbox[RCS] = GEN6_RVESYNC;
> ring->signal_mbox[VCS] = GEN6_VVESYNC;
> ring->signal_mbox[BCS] = GEN6_BVESYNC;
> ring->signal_mbox[VECS] = GEN6_NOSYNC;
> + ring->signal_mbox[VCS2] = GEN6_NOSYNC;
> ring->init = init_ring_common;
>
> return intel_init_ring_buffer(dev, ring);
> diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
> index 413cdc7..8ca4285 100644
> --- a/drivers/gpu/drm/i915/intel_ringbuffer.h
> +++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
> @@ -61,8 +61,9 @@ struct intel_ring_buffer {
> VCS,
> BCS,
> VECS,
> + VCS2,
> } id;
> -#define I915_NUM_RINGS 4
> +#define I915_NUM_RINGS 5
> u32 mmio_base;
> void __iomem *virtual_start;
> struct drm_device *dev;
> @@ -286,6 +287,7 @@ int intel_ring_invalidate_all_caches(struct intel_ring_buffer *ring);
>
> int intel_init_render_ring_buffer(struct drm_device *dev);
> int intel_init_bsd_ring_buffer(struct drm_device *dev);
> +int intel_init_bsd2_ring_buffer(struct drm_device *dev);
> int intel_init_blt_ring_buffer(struct drm_device *dev);
> int intel_init_vebox_ring_buffer(struct drm_device *dev);
>
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