The check in batch_bo_finish should catch any undefined values in the batch
but isn't that great for debugging. The checks in the various emit
functions will help get better granularity.
This avoids the full brw context initialization and just sets up context
constants, initializes extensions and sets a few driver vfuncs for the
front-end GLSL compiler.
Dynamic color/blend state can be NULL in case we're not rendering to
color targets (only output to depth and/or stencil). Initialize
cmd_buffer->cb_state to NULL so we can reliably detect whether it's been
set or not.
This supports the three Vulkan border color types for float color
formats. The support for integer formats is a little trickier, as we
don't know the format of the texture at this time.
According to the bspec, you're supposed to emit a PIPE_CONTROL with a CS
stall and a render target flush prior to chainging STATE_BASE_ADDRESS. A
little experimentation, however, shows that this is not enough. It also
appears as if you have to flush the texture cache after chainging base
address or things won't propagate properly.
This commit allows for us to create a whole new surface state buffer when
the old one runs out of room. We simply re-emit the state base address for
the new state, re-emit binding tables, and keep going.
Before, we were emitting surface states up-front when binding tables were
updated. Now, we wait to emit the surface states until we emit the binding
table. This makes meta simpler and should make it easier to deal with
swapping out the surface state buffer.
We need to make sure we use the right index into dynamic offset
array. Dynamic descriptors can be present or not in different stages and
to get the right offset, we need to compute the index at
vkCreateDescriptorSetLayout time.
We do this by creating a surface state on the fly that incorporates the
dynamic offset. This patch also refactor the descriptor set layout
constructor a bit to be less clever with switch statement fall
through. Instead of duplicating the subtle code to update the sampler
and surface slot map, we just use two switch statements.
We rely on these being initialized to NULL so meta can reliably detect
whether or not they've been set. ds_state is also allowed to not be
present so we need a well-defined value for that.
This mega-commit primarily does two things. First, is to turn anv_batch
into a better abstraction of a batch. Instead of actually having a BO, it
now has a few pointers to some piece of memory that are used to add data to
the "batch". If it gets to the end, there is a function pointer that it
can call to attempt to grow the batch.
The second change is to start using chained batch buffers. When the end of
the current batch BO is reached, it automatically creates a new one and
ineserts an MI_BATCH_BUFFER_START command to chain to it. In this way, our
batch buffers are effectively infinite in length.
