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![Tvrtko Ursulin](/assets/img/avatar_default.png)
We mix hexa- and decimal which is confusing when reading the logs. So make the single odd one out instance decimal for consistency. v2: * Do the intel_ringbuffer.c as well. (Chris Wilson) Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Link: https://patchwork.freedesktop.org/patch/msgid/20180926145033.16318-1-tvrtko.ursulin@linux.intel.com
2305 lines
58 KiB
C
2305 lines
58 KiB
C
/*
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* Copyright © 2008-2010 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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* Authors:
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* Eric Anholt <eric@anholt.net>
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* Zou Nan hai <nanhai.zou@intel.com>
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* Xiang Hai hao<haihao.xiang@intel.com>
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*
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*/
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#include <linux/log2.h>
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#include <drm/drmP.h>
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#include <drm/i915_drm.h>
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#include "i915_drv.h"
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#include "i915_gem_render_state.h"
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#include "i915_trace.h"
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#include "intel_drv.h"
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#include "intel_workarounds.h"
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/* Rough estimate of the typical request size, performing a flush,
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* set-context and then emitting the batch.
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*/
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#define LEGACY_REQUEST_SIZE 200
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static unsigned int __intel_ring_space(unsigned int head,
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unsigned int tail,
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unsigned int size)
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{
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/*
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* "If the Ring Buffer Head Pointer and the Tail Pointer are on the
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* same cacheline, the Head Pointer must not be greater than the Tail
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* Pointer."
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*/
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GEM_BUG_ON(!is_power_of_2(size));
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return (head - tail - CACHELINE_BYTES) & (size - 1);
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}
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unsigned int intel_ring_update_space(struct intel_ring *ring)
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{
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unsigned int space;
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space = __intel_ring_space(ring->head, ring->emit, ring->size);
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ring->space = space;
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return space;
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}
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static int
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gen2_render_ring_flush(struct i915_request *rq, u32 mode)
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{
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u32 cmd, *cs;
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cmd = MI_FLUSH;
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if (mode & EMIT_INVALIDATE)
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cmd |= MI_READ_FLUSH;
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cs = intel_ring_begin(rq, 2);
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if (IS_ERR(cs))
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return PTR_ERR(cs);
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*cs++ = cmd;
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*cs++ = MI_NOOP;
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intel_ring_advance(rq, cs);
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return 0;
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}
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static int
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gen4_render_ring_flush(struct i915_request *rq, u32 mode)
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{
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u32 cmd, *cs;
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/*
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* read/write caches:
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*
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* I915_GEM_DOMAIN_RENDER is always invalidated, but is
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* only flushed if MI_NO_WRITE_FLUSH is unset. On 965, it is
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* also flushed at 2d versus 3d pipeline switches.
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*
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* read-only caches:
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*
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* I915_GEM_DOMAIN_SAMPLER is flushed on pre-965 if
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* MI_READ_FLUSH is set, and is always flushed on 965.
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*
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* I915_GEM_DOMAIN_COMMAND may not exist?
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*
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* I915_GEM_DOMAIN_INSTRUCTION, which exists on 965, is
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* invalidated when MI_EXE_FLUSH is set.
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*
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* I915_GEM_DOMAIN_VERTEX, which exists on 965, is
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* invalidated with every MI_FLUSH.
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*
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* TLBs:
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*
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* On 965, TLBs associated with I915_GEM_DOMAIN_COMMAND
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* and I915_GEM_DOMAIN_CPU in are invalidated at PTE write and
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* I915_GEM_DOMAIN_RENDER and I915_GEM_DOMAIN_SAMPLER
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* are flushed at any MI_FLUSH.
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*/
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cmd = MI_FLUSH;
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if (mode & EMIT_INVALIDATE) {
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cmd |= MI_EXE_FLUSH;
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if (IS_G4X(rq->i915) || IS_GEN5(rq->i915))
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cmd |= MI_INVALIDATE_ISP;
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}
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cs = intel_ring_begin(rq, 2);
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if (IS_ERR(cs))
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return PTR_ERR(cs);
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*cs++ = cmd;
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*cs++ = MI_NOOP;
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intel_ring_advance(rq, cs);
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return 0;
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}
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/*
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* Emits a PIPE_CONTROL with a non-zero post-sync operation, for
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* implementing two workarounds on gen6. From section 1.4.7.1
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* "PIPE_CONTROL" of the Sandy Bridge PRM volume 2 part 1:
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*
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* [DevSNB-C+{W/A}] Before any depth stall flush (including those
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* produced by non-pipelined state commands), software needs to first
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* send a PIPE_CONTROL with no bits set except Post-Sync Operation !=
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* 0.
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*
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* [Dev-SNB{W/A}]: Before a PIPE_CONTROL with Write Cache Flush Enable
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* =1, a PIPE_CONTROL with any non-zero post-sync-op is required.
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*
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* And the workaround for these two requires this workaround first:
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*
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* [Dev-SNB{W/A}]: Pipe-control with CS-stall bit set must be sent
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* BEFORE the pipe-control with a post-sync op and no write-cache
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* flushes.
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*
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* And this last workaround is tricky because of the requirements on
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* that bit. From section 1.4.7.2.3 "Stall" of the Sandy Bridge PRM
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* volume 2 part 1:
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*
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* "1 of the following must also be set:
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* - Render Target Cache Flush Enable ([12] of DW1)
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* - Depth Cache Flush Enable ([0] of DW1)
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* - Stall at Pixel Scoreboard ([1] of DW1)
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* - Depth Stall ([13] of DW1)
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* - Post-Sync Operation ([13] of DW1)
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* - Notify Enable ([8] of DW1)"
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*
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* The cache flushes require the workaround flush that triggered this
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* one, so we can't use it. Depth stall would trigger the same.
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* Post-sync nonzero is what triggered this second workaround, so we
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* can't use that one either. Notify enable is IRQs, which aren't
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* really our business. That leaves only stall at scoreboard.
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*/
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static int
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intel_emit_post_sync_nonzero_flush(struct i915_request *rq)
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{
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u32 scratch_addr =
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i915_ggtt_offset(rq->engine->scratch) + 2 * CACHELINE_BYTES;
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u32 *cs;
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cs = intel_ring_begin(rq, 6);
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if (IS_ERR(cs))
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return PTR_ERR(cs);
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*cs++ = GFX_OP_PIPE_CONTROL(5);
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*cs++ = PIPE_CONTROL_CS_STALL | PIPE_CONTROL_STALL_AT_SCOREBOARD;
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*cs++ = scratch_addr | PIPE_CONTROL_GLOBAL_GTT;
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*cs++ = 0; /* low dword */
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*cs++ = 0; /* high dword */
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*cs++ = MI_NOOP;
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intel_ring_advance(rq, cs);
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cs = intel_ring_begin(rq, 6);
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if (IS_ERR(cs))
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return PTR_ERR(cs);
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*cs++ = GFX_OP_PIPE_CONTROL(5);
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*cs++ = PIPE_CONTROL_QW_WRITE;
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*cs++ = scratch_addr | PIPE_CONTROL_GLOBAL_GTT;
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*cs++ = 0;
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*cs++ = 0;
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*cs++ = MI_NOOP;
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intel_ring_advance(rq, cs);
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return 0;
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}
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static int
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gen6_render_ring_flush(struct i915_request *rq, u32 mode)
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{
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u32 scratch_addr =
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i915_ggtt_offset(rq->engine->scratch) + 2 * CACHELINE_BYTES;
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u32 *cs, flags = 0;
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int ret;
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/* Force SNB workarounds for PIPE_CONTROL flushes */
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ret = intel_emit_post_sync_nonzero_flush(rq);
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if (ret)
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return ret;
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/* Just flush everything. Experiments have shown that reducing the
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* number of bits based on the write domains has little performance
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* impact.
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*/
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if (mode & EMIT_FLUSH) {
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flags |= PIPE_CONTROL_RENDER_TARGET_CACHE_FLUSH;
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flags |= PIPE_CONTROL_DEPTH_CACHE_FLUSH;
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/*
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* Ensure that any following seqno writes only happen
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* when the render cache is indeed flushed.
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*/
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flags |= PIPE_CONTROL_CS_STALL;
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}
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if (mode & EMIT_INVALIDATE) {
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flags |= PIPE_CONTROL_TLB_INVALIDATE;
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flags |= PIPE_CONTROL_INSTRUCTION_CACHE_INVALIDATE;
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flags |= PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE;
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flags |= PIPE_CONTROL_VF_CACHE_INVALIDATE;
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flags |= PIPE_CONTROL_CONST_CACHE_INVALIDATE;
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flags |= PIPE_CONTROL_STATE_CACHE_INVALIDATE;
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/*
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* TLB invalidate requires a post-sync write.
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*/
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flags |= PIPE_CONTROL_QW_WRITE | PIPE_CONTROL_CS_STALL;
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}
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cs = intel_ring_begin(rq, 4);
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if (IS_ERR(cs))
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return PTR_ERR(cs);
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*cs++ = GFX_OP_PIPE_CONTROL(4);
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*cs++ = flags;
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*cs++ = scratch_addr | PIPE_CONTROL_GLOBAL_GTT;
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*cs++ = 0;
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intel_ring_advance(rq, cs);
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return 0;
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}
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static int
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gen7_render_ring_cs_stall_wa(struct i915_request *rq)
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{
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u32 *cs;
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cs = intel_ring_begin(rq, 4);
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if (IS_ERR(cs))
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return PTR_ERR(cs);
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*cs++ = GFX_OP_PIPE_CONTROL(4);
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*cs++ = PIPE_CONTROL_CS_STALL | PIPE_CONTROL_STALL_AT_SCOREBOARD;
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*cs++ = 0;
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*cs++ = 0;
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intel_ring_advance(rq, cs);
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return 0;
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}
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static int
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gen7_render_ring_flush(struct i915_request *rq, u32 mode)
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{
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u32 scratch_addr =
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i915_ggtt_offset(rq->engine->scratch) + 2 * CACHELINE_BYTES;
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u32 *cs, flags = 0;
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/*
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* Ensure that any following seqno writes only happen when the render
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* cache is indeed flushed.
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*
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* Workaround: 4th PIPE_CONTROL command (except the ones with only
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* read-cache invalidate bits set) must have the CS_STALL bit set. We
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* don't try to be clever and just set it unconditionally.
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*/
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flags |= PIPE_CONTROL_CS_STALL;
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/* Just flush everything. Experiments have shown that reducing the
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* number of bits based on the write domains has little performance
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* impact.
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*/
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if (mode & EMIT_FLUSH) {
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flags |= PIPE_CONTROL_RENDER_TARGET_CACHE_FLUSH;
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flags |= PIPE_CONTROL_DEPTH_CACHE_FLUSH;
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flags |= PIPE_CONTROL_DC_FLUSH_ENABLE;
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flags |= PIPE_CONTROL_FLUSH_ENABLE;
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}
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if (mode & EMIT_INVALIDATE) {
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flags |= PIPE_CONTROL_TLB_INVALIDATE;
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flags |= PIPE_CONTROL_INSTRUCTION_CACHE_INVALIDATE;
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flags |= PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE;
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flags |= PIPE_CONTROL_VF_CACHE_INVALIDATE;
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flags |= PIPE_CONTROL_CONST_CACHE_INVALIDATE;
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flags |= PIPE_CONTROL_STATE_CACHE_INVALIDATE;
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flags |= PIPE_CONTROL_MEDIA_STATE_CLEAR;
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/*
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* TLB invalidate requires a post-sync write.
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*/
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flags |= PIPE_CONTROL_QW_WRITE;
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flags |= PIPE_CONTROL_GLOBAL_GTT_IVB;
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flags |= PIPE_CONTROL_STALL_AT_SCOREBOARD;
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/* Workaround: we must issue a pipe_control with CS-stall bit
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* set before a pipe_control command that has the state cache
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* invalidate bit set. */
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gen7_render_ring_cs_stall_wa(rq);
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}
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cs = intel_ring_begin(rq, 4);
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if (IS_ERR(cs))
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return PTR_ERR(cs);
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*cs++ = GFX_OP_PIPE_CONTROL(4);
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*cs++ = flags;
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*cs++ = scratch_addr;
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*cs++ = 0;
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intel_ring_advance(rq, cs);
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return 0;
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}
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static void ring_setup_phys_status_page(struct intel_engine_cs *engine)
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{
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struct drm_i915_private *dev_priv = engine->i915;
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struct page *page = virt_to_page(engine->status_page.page_addr);
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phys_addr_t phys = PFN_PHYS(page_to_pfn(page));
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u32 addr;
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addr = lower_32_bits(phys);
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if (INTEL_GEN(dev_priv) >= 4)
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addr |= (phys >> 28) & 0xf0;
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I915_WRITE(HWS_PGA, addr);
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}
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static void intel_ring_setup_status_page(struct intel_engine_cs *engine)
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{
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struct drm_i915_private *dev_priv = engine->i915;
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i915_reg_t mmio;
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/* The ring status page addresses are no longer next to the rest of
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* the ring registers as of gen7.
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*/
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if (IS_GEN7(dev_priv)) {
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switch (engine->id) {
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/*
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* No more rings exist on Gen7. Default case is only to shut up
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* gcc switch check warning.
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*/
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default:
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GEM_BUG_ON(engine->id);
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case RCS:
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mmio = RENDER_HWS_PGA_GEN7;
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break;
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case BCS:
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mmio = BLT_HWS_PGA_GEN7;
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break;
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case VCS:
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mmio = BSD_HWS_PGA_GEN7;
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break;
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case VECS:
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mmio = VEBOX_HWS_PGA_GEN7;
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break;
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}
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} else if (IS_GEN6(dev_priv)) {
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mmio = RING_HWS_PGA_GEN6(engine->mmio_base);
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} else {
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mmio = RING_HWS_PGA(engine->mmio_base);
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}
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if (INTEL_GEN(dev_priv) >= 6) {
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u32 mask = ~0u;
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/*
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* Keep the render interrupt unmasked as this papers over
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* lost interrupts following a reset.
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*/
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if (engine->id == RCS)
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mask &= ~BIT(0);
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I915_WRITE(RING_HWSTAM(engine->mmio_base), mask);
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}
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I915_WRITE(mmio, engine->status_page.ggtt_offset);
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POSTING_READ(mmio);
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/* Flush the TLB for this page */
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if (IS_GEN(dev_priv, 6, 7)) {
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i915_reg_t reg = RING_INSTPM(engine->mmio_base);
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/* ring should be idle before issuing a sync flush*/
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WARN_ON((I915_READ_MODE(engine) & MODE_IDLE) == 0);
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I915_WRITE(reg,
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_MASKED_BIT_ENABLE(INSTPM_TLB_INVALIDATE |
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INSTPM_SYNC_FLUSH));
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if (intel_wait_for_register(dev_priv,
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reg, INSTPM_SYNC_FLUSH, 0,
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1000))
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DRM_ERROR("%s: wait for SyncFlush to complete for TLB invalidation timed out\n",
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engine->name);
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}
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}
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|
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static bool stop_ring(struct intel_engine_cs *engine)
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{
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struct drm_i915_private *dev_priv = engine->i915;
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if (INTEL_GEN(dev_priv) > 2) {
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I915_WRITE_MODE(engine, _MASKED_BIT_ENABLE(STOP_RING));
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if (intel_wait_for_register(dev_priv,
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RING_MI_MODE(engine->mmio_base),
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MODE_IDLE,
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MODE_IDLE,
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1000)) {
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DRM_ERROR("%s : timed out trying to stop ring\n",
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engine->name);
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/* Sometimes we observe that the idle flag is not
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* set even though the ring is empty. So double
|
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* check before giving up.
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*/
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if (I915_READ_HEAD(engine) != I915_READ_TAIL(engine))
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return false;
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}
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}
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|
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I915_WRITE_HEAD(engine, I915_READ_TAIL(engine));
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|
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I915_WRITE_HEAD(engine, 0);
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I915_WRITE_TAIL(engine, 0);
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|
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/* The ring must be empty before it is disabled */
|
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I915_WRITE_CTL(engine, 0);
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return (I915_READ_HEAD(engine) & HEAD_ADDR) == 0;
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}
|
|
|
|
static int init_ring_common(struct intel_engine_cs *engine)
|
|
{
|
|
struct drm_i915_private *dev_priv = engine->i915;
|
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struct intel_ring *ring = engine->buffer;
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int ret = 0;
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|
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intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
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|
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if (!stop_ring(engine)) {
|
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/* G45 ring initialization often fails to reset head to zero */
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DRM_DEBUG_DRIVER("%s head not reset to zero "
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"ctl %08x head %08x tail %08x start %08x\n",
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engine->name,
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I915_READ_CTL(engine),
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I915_READ_HEAD(engine),
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I915_READ_TAIL(engine),
|
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I915_READ_START(engine));
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|
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if (!stop_ring(engine)) {
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DRM_ERROR("failed to set %s head to zero "
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"ctl %08x head %08x tail %08x start %08x\n",
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engine->name,
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I915_READ_CTL(engine),
|
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I915_READ_HEAD(engine),
|
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I915_READ_TAIL(engine),
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I915_READ_START(engine));
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|
ret = -EIO;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if (HWS_NEEDS_PHYSICAL(dev_priv))
|
|
ring_setup_phys_status_page(engine);
|
|
else
|
|
intel_ring_setup_status_page(engine);
|
|
|
|
intel_engine_reset_breadcrumbs(engine);
|
|
|
|
/* Enforce ordering by reading HEAD register back */
|
|
I915_READ_HEAD(engine);
|
|
|
|
/* Initialize the ring. This must happen _after_ we've cleared the ring
|
|
* registers with the above sequence (the readback of the HEAD registers
|
|
* also enforces ordering), otherwise the hw might lose the new ring
|
|
* register values. */
|
|
I915_WRITE_START(engine, i915_ggtt_offset(ring->vma));
|
|
|
|
/* WaClearRingBufHeadRegAtInit:ctg,elk */
|
|
if (I915_READ_HEAD(engine))
|
|
DRM_DEBUG_DRIVER("%s initialization failed [head=%08x], fudging\n",
|
|
engine->name, I915_READ_HEAD(engine));
|
|
|
|
/* Check that the ring offsets point within the ring! */
|
|
GEM_BUG_ON(!intel_ring_offset_valid(ring, ring->head));
|
|
GEM_BUG_ON(!intel_ring_offset_valid(ring, ring->tail));
|
|
|
|
intel_ring_update_space(ring);
|
|
I915_WRITE_HEAD(engine, ring->head);
|
|
I915_WRITE_TAIL(engine, ring->tail);
|
|
(void)I915_READ_TAIL(engine);
|
|
|
|
I915_WRITE_CTL(engine, RING_CTL_SIZE(ring->size) | RING_VALID);
|
|
|
|
/* If the head is still not zero, the ring is dead */
|
|
if (intel_wait_for_register(dev_priv, RING_CTL(engine->mmio_base),
|
|
RING_VALID, RING_VALID,
|
|
50)) {
|
|
DRM_ERROR("%s initialization failed "
|
|
"ctl %08x (valid? %d) head %08x [%08x] tail %08x [%08x] start %08x [expected %08x]\n",
|
|
engine->name,
|
|
I915_READ_CTL(engine),
|
|
I915_READ_CTL(engine) & RING_VALID,
|
|
I915_READ_HEAD(engine), ring->head,
|
|
I915_READ_TAIL(engine), ring->tail,
|
|
I915_READ_START(engine),
|
|
i915_ggtt_offset(ring->vma));
|
|
ret = -EIO;
|
|
goto out;
|
|
}
|
|
|
|
if (INTEL_GEN(dev_priv) > 2)
|
|
I915_WRITE_MODE(engine, _MASKED_BIT_DISABLE(STOP_RING));
|
|
|
|
/* Papering over lost _interrupts_ immediately following the restart */
|
|
intel_engine_wakeup(engine);
|
|
out:
|
|
intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct i915_request *reset_prepare(struct intel_engine_cs *engine)
|
|
{
|
|
intel_engine_stop_cs(engine);
|
|
|
|
if (engine->irq_seqno_barrier)
|
|
engine->irq_seqno_barrier(engine);
|
|
|
|
return i915_gem_find_active_request(engine);
|
|
}
|
|
|
|
static void skip_request(struct i915_request *rq)
|
|
{
|
|
void *vaddr = rq->ring->vaddr;
|
|
u32 head;
|
|
|
|
head = rq->infix;
|
|
if (rq->postfix < head) {
|
|
memset32(vaddr + head, MI_NOOP,
|
|
(rq->ring->size - head) / sizeof(u32));
|
|
head = 0;
|
|
}
|
|
memset32(vaddr + head, MI_NOOP, (rq->postfix - head) / sizeof(u32));
|
|
}
|
|
|
|
static void reset_ring(struct intel_engine_cs *engine, struct i915_request *rq)
|
|
{
|
|
GEM_TRACE("%s request global=%d, current=%d\n",
|
|
engine->name, rq ? rq->global_seqno : 0,
|
|
intel_engine_get_seqno(engine));
|
|
|
|
/*
|
|
* Try to restore the logical GPU state to match the continuation
|
|
* of the request queue. If we skip the context/PD restore, then
|
|
* the next request may try to execute assuming that its context
|
|
* is valid and loaded on the GPU and so may try to access invalid
|
|
* memory, prompting repeated GPU hangs.
|
|
*
|
|
* If the request was guilty, we still restore the logical state
|
|
* in case the next request requires it (e.g. the aliasing ppgtt),
|
|
* but skip over the hung batch.
|
|
*
|
|
* If the request was innocent, we try to replay the request with
|
|
* the restored context.
|
|
*/
|
|
if (rq) {
|
|
/* If the rq hung, jump to its breadcrumb and skip the batch */
|
|
rq->ring->head = intel_ring_wrap(rq->ring, rq->head);
|
|
if (rq->fence.error == -EIO)
|
|
skip_request(rq);
|
|
}
|
|
}
|
|
|
|
static void reset_finish(struct intel_engine_cs *engine)
|
|
{
|
|
}
|
|
|
|
static int intel_rcs_ctx_init(struct i915_request *rq)
|
|
{
|
|
int ret;
|
|
|
|
ret = intel_ctx_workarounds_emit(rq);
|
|
if (ret != 0)
|
|
return ret;
|
|
|
|
ret = i915_gem_render_state_emit(rq);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int init_render_ring(struct intel_engine_cs *engine)
|
|
{
|
|
struct drm_i915_private *dev_priv = engine->i915;
|
|
int ret = init_ring_common(engine);
|
|
if (ret)
|
|
return ret;
|
|
|
|
intel_whitelist_workarounds_apply(engine);
|
|
|
|
/* WaTimedSingleVertexDispatch:cl,bw,ctg,elk,ilk,snb */
|
|
if (IS_GEN(dev_priv, 4, 6))
|
|
I915_WRITE(MI_MODE, _MASKED_BIT_ENABLE(VS_TIMER_DISPATCH));
|
|
|
|
/* We need to disable the AsyncFlip performance optimisations in order
|
|
* to use MI_WAIT_FOR_EVENT within the CS. It should already be
|
|
* programmed to '1' on all products.
|
|
*
|
|
* WaDisableAsyncFlipPerfMode:snb,ivb,hsw,vlv
|
|
*/
|
|
if (IS_GEN(dev_priv, 6, 7))
|
|
I915_WRITE(MI_MODE, _MASKED_BIT_ENABLE(ASYNC_FLIP_PERF_DISABLE));
|
|
|
|
/* Required for the hardware to program scanline values for waiting */
|
|
/* WaEnableFlushTlbInvalidationMode:snb */
|
|
if (IS_GEN6(dev_priv))
|
|
I915_WRITE(GFX_MODE,
|
|
_MASKED_BIT_ENABLE(GFX_TLB_INVALIDATE_EXPLICIT));
|
|
|
|
/* WaBCSVCSTlbInvalidationMode:ivb,vlv,hsw */
|
|
if (IS_GEN7(dev_priv))
|
|
I915_WRITE(GFX_MODE_GEN7,
|
|
_MASKED_BIT_ENABLE(GFX_TLB_INVALIDATE_EXPLICIT) |
|
|
_MASKED_BIT_ENABLE(GFX_REPLAY_MODE));
|
|
|
|
if (IS_GEN6(dev_priv)) {
|
|
/* From the Sandybridge PRM, volume 1 part 3, page 24:
|
|
* "If this bit is set, STCunit will have LRA as replacement
|
|
* policy. [...] This bit must be reset. LRA replacement
|
|
* policy is not supported."
|
|
*/
|
|
I915_WRITE(CACHE_MODE_0,
|
|
_MASKED_BIT_DISABLE(CM0_STC_EVICT_DISABLE_LRA_SNB));
|
|
}
|
|
|
|
if (IS_GEN(dev_priv, 6, 7))
|
|
I915_WRITE(INSTPM, _MASKED_BIT_ENABLE(INSTPM_FORCE_ORDERING));
|
|
|
|
if (INTEL_GEN(dev_priv) >= 6)
|
|
I915_WRITE_IMR(engine, ~engine->irq_keep_mask);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static u32 *gen6_signal(struct i915_request *rq, u32 *cs)
|
|
{
|
|
struct drm_i915_private *dev_priv = rq->i915;
|
|
struct intel_engine_cs *engine;
|
|
enum intel_engine_id id;
|
|
int num_rings = 0;
|
|
|
|
for_each_engine(engine, dev_priv, id) {
|
|
i915_reg_t mbox_reg;
|
|
|
|
if (!(BIT(engine->hw_id) & GEN6_SEMAPHORES_MASK))
|
|
continue;
|
|
|
|
mbox_reg = rq->engine->semaphore.mbox.signal[engine->hw_id];
|
|
if (i915_mmio_reg_valid(mbox_reg)) {
|
|
*cs++ = MI_LOAD_REGISTER_IMM(1);
|
|
*cs++ = i915_mmio_reg_offset(mbox_reg);
|
|
*cs++ = rq->global_seqno;
|
|
num_rings++;
|
|
}
|
|
}
|
|
if (num_rings & 1)
|
|
*cs++ = MI_NOOP;
|
|
|
|
return cs;
|
|
}
|
|
|
|
static void cancel_requests(struct intel_engine_cs *engine)
|
|
{
|
|
struct i915_request *request;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&engine->timeline.lock, flags);
|
|
|
|
/* Mark all submitted requests as skipped. */
|
|
list_for_each_entry(request, &engine->timeline.requests, link) {
|
|
GEM_BUG_ON(!request->global_seqno);
|
|
if (!i915_request_completed(request))
|
|
dma_fence_set_error(&request->fence, -EIO);
|
|
}
|
|
/* Remaining _unready_ requests will be nop'ed when submitted */
|
|
|
|
spin_unlock_irqrestore(&engine->timeline.lock, flags);
|
|
}
|
|
|
|
static void i9xx_submit_request(struct i915_request *request)
|
|
{
|
|
struct drm_i915_private *dev_priv = request->i915;
|
|
|
|
i915_request_submit(request);
|
|
|
|
I915_WRITE_TAIL(request->engine,
|
|
intel_ring_set_tail(request->ring, request->tail));
|
|
}
|
|
|
|
static void i9xx_emit_breadcrumb(struct i915_request *rq, u32 *cs)
|
|
{
|
|
*cs++ = MI_STORE_DWORD_INDEX;
|
|
*cs++ = I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT;
|
|
*cs++ = rq->global_seqno;
|
|
*cs++ = MI_USER_INTERRUPT;
|
|
|
|
rq->tail = intel_ring_offset(rq, cs);
|
|
assert_ring_tail_valid(rq->ring, rq->tail);
|
|
}
|
|
|
|
static const int i9xx_emit_breadcrumb_sz = 4;
|
|
|
|
static void gen6_sema_emit_breadcrumb(struct i915_request *rq, u32 *cs)
|
|
{
|
|
return i9xx_emit_breadcrumb(rq, rq->engine->semaphore.signal(rq, cs));
|
|
}
|
|
|
|
static int
|
|
gen6_ring_sync_to(struct i915_request *rq, struct i915_request *signal)
|
|
{
|
|
u32 dw1 = MI_SEMAPHORE_MBOX |
|
|
MI_SEMAPHORE_COMPARE |
|
|
MI_SEMAPHORE_REGISTER;
|
|
u32 wait_mbox = signal->engine->semaphore.mbox.wait[rq->engine->hw_id];
|
|
u32 *cs;
|
|
|
|
WARN_ON(wait_mbox == MI_SEMAPHORE_SYNC_INVALID);
|
|
|
|
cs = intel_ring_begin(rq, 4);
|
|
if (IS_ERR(cs))
|
|
return PTR_ERR(cs);
|
|
|
|
*cs++ = dw1 | wait_mbox;
|
|
/* Throughout all of the GEM code, seqno passed implies our current
|
|
* seqno is >= the last seqno executed. However for hardware the
|
|
* comparison is strictly greater than.
|
|
*/
|
|
*cs++ = signal->global_seqno - 1;
|
|
*cs++ = 0;
|
|
*cs++ = MI_NOOP;
|
|
intel_ring_advance(rq, cs);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
gen5_seqno_barrier(struct intel_engine_cs *engine)
|
|
{
|
|
/* MI_STORE are internally buffered by the GPU and not flushed
|
|
* either by MI_FLUSH or SyncFlush or any other combination of
|
|
* MI commands.
|
|
*
|
|
* "Only the submission of the store operation is guaranteed.
|
|
* The write result will be complete (coherent) some time later
|
|
* (this is practically a finite period but there is no guaranteed
|
|
* latency)."
|
|
*
|
|
* Empirically, we observe that we need a delay of at least 75us to
|
|
* be sure that the seqno write is visible by the CPU.
|
|
*/
|
|
usleep_range(125, 250);
|
|
}
|
|
|
|
static void
|
|
gen6_seqno_barrier(struct intel_engine_cs *engine)
|
|
{
|
|
struct drm_i915_private *dev_priv = engine->i915;
|
|
|
|
/* Workaround to force correct ordering between irq and seqno writes on
|
|
* ivb (and maybe also on snb) by reading from a CS register (like
|
|
* ACTHD) before reading the status page.
|
|
*
|
|
* Note that this effectively stalls the read by the time it takes to
|
|
* do a memory transaction, which more or less ensures that the write
|
|
* from the GPU has sufficient time to invalidate the CPU cacheline.
|
|
* Alternatively we could delay the interrupt from the CS ring to give
|
|
* the write time to land, but that would incur a delay after every
|
|
* batch i.e. much more frequent than a delay when waiting for the
|
|
* interrupt (with the same net latency).
|
|
*
|
|
* Also note that to prevent whole machine hangs on gen7, we have to
|
|
* take the spinlock to guard against concurrent cacheline access.
|
|
*/
|
|
spin_lock_irq(&dev_priv->uncore.lock);
|
|
POSTING_READ_FW(RING_ACTHD(engine->mmio_base));
|
|
spin_unlock_irq(&dev_priv->uncore.lock);
|
|
}
|
|
|
|
static void
|
|
gen5_irq_enable(struct intel_engine_cs *engine)
|
|
{
|
|
gen5_enable_gt_irq(engine->i915, engine->irq_enable_mask);
|
|
}
|
|
|
|
static void
|
|
gen5_irq_disable(struct intel_engine_cs *engine)
|
|
{
|
|
gen5_disable_gt_irq(engine->i915, engine->irq_enable_mask);
|
|
}
|
|
|
|
static void
|
|
i9xx_irq_enable(struct intel_engine_cs *engine)
|
|
{
|
|
struct drm_i915_private *dev_priv = engine->i915;
|
|
|
|
dev_priv->irq_mask &= ~engine->irq_enable_mask;
|
|
I915_WRITE(IMR, dev_priv->irq_mask);
|
|
POSTING_READ_FW(RING_IMR(engine->mmio_base));
|
|
}
|
|
|
|
static void
|
|
i9xx_irq_disable(struct intel_engine_cs *engine)
|
|
{
|
|
struct drm_i915_private *dev_priv = engine->i915;
|
|
|
|
dev_priv->irq_mask |= engine->irq_enable_mask;
|
|
I915_WRITE(IMR, dev_priv->irq_mask);
|
|
}
|
|
|
|
static void
|
|
i8xx_irq_enable(struct intel_engine_cs *engine)
|
|
{
|
|
struct drm_i915_private *dev_priv = engine->i915;
|
|
|
|
dev_priv->irq_mask &= ~engine->irq_enable_mask;
|
|
I915_WRITE16(IMR, dev_priv->irq_mask);
|
|
POSTING_READ16(RING_IMR(engine->mmio_base));
|
|
}
|
|
|
|
static void
|
|
i8xx_irq_disable(struct intel_engine_cs *engine)
|
|
{
|
|
struct drm_i915_private *dev_priv = engine->i915;
|
|
|
|
dev_priv->irq_mask |= engine->irq_enable_mask;
|
|
I915_WRITE16(IMR, dev_priv->irq_mask);
|
|
}
|
|
|
|
static int
|
|
bsd_ring_flush(struct i915_request *rq, u32 mode)
|
|
{
|
|
u32 *cs;
|
|
|
|
cs = intel_ring_begin(rq, 2);
|
|
if (IS_ERR(cs))
|
|
return PTR_ERR(cs);
|
|
|
|
*cs++ = MI_FLUSH;
|
|
*cs++ = MI_NOOP;
|
|
intel_ring_advance(rq, cs);
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
gen6_irq_enable(struct intel_engine_cs *engine)
|
|
{
|
|
struct drm_i915_private *dev_priv = engine->i915;
|
|
|
|
I915_WRITE_IMR(engine,
|
|
~(engine->irq_enable_mask |
|
|
engine->irq_keep_mask));
|
|
gen5_enable_gt_irq(dev_priv, engine->irq_enable_mask);
|
|
}
|
|
|
|
static void
|
|
gen6_irq_disable(struct intel_engine_cs *engine)
|
|
{
|
|
struct drm_i915_private *dev_priv = engine->i915;
|
|
|
|
I915_WRITE_IMR(engine, ~engine->irq_keep_mask);
|
|
gen5_disable_gt_irq(dev_priv, engine->irq_enable_mask);
|
|
}
|
|
|
|
static void
|
|
hsw_vebox_irq_enable(struct intel_engine_cs *engine)
|
|
{
|
|
struct drm_i915_private *dev_priv = engine->i915;
|
|
|
|
I915_WRITE_IMR(engine, ~engine->irq_enable_mask);
|
|
gen6_unmask_pm_irq(dev_priv, engine->irq_enable_mask);
|
|
}
|
|
|
|
static void
|
|
hsw_vebox_irq_disable(struct intel_engine_cs *engine)
|
|
{
|
|
struct drm_i915_private *dev_priv = engine->i915;
|
|
|
|
I915_WRITE_IMR(engine, ~0);
|
|
gen6_mask_pm_irq(dev_priv, engine->irq_enable_mask);
|
|
}
|
|
|
|
static int
|
|
i965_emit_bb_start(struct i915_request *rq,
|
|
u64 offset, u32 length,
|
|
unsigned int dispatch_flags)
|
|
{
|
|
u32 *cs;
|
|
|
|
cs = intel_ring_begin(rq, 2);
|
|
if (IS_ERR(cs))
|
|
return PTR_ERR(cs);
|
|
|
|
*cs++ = MI_BATCH_BUFFER_START | MI_BATCH_GTT | (dispatch_flags &
|
|
I915_DISPATCH_SECURE ? 0 : MI_BATCH_NON_SECURE_I965);
|
|
*cs++ = offset;
|
|
intel_ring_advance(rq, cs);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Just userspace ABI convention to limit the wa batch bo to a resonable size */
|
|
#define I830_BATCH_LIMIT (256*1024)
|
|
#define I830_TLB_ENTRIES (2)
|
|
#define I830_WA_SIZE max(I830_TLB_ENTRIES*4096, I830_BATCH_LIMIT)
|
|
static int
|
|
i830_emit_bb_start(struct i915_request *rq,
|
|
u64 offset, u32 len,
|
|
unsigned int dispatch_flags)
|
|
{
|
|
u32 *cs, cs_offset = i915_ggtt_offset(rq->engine->scratch);
|
|
|
|
cs = intel_ring_begin(rq, 6);
|
|
if (IS_ERR(cs))
|
|
return PTR_ERR(cs);
|
|
|
|
/* Evict the invalid PTE TLBs */
|
|
*cs++ = COLOR_BLT_CMD | BLT_WRITE_RGBA;
|
|
*cs++ = BLT_DEPTH_32 | BLT_ROP_COLOR_COPY | 4096;
|
|
*cs++ = I830_TLB_ENTRIES << 16 | 4; /* load each page */
|
|
*cs++ = cs_offset;
|
|
*cs++ = 0xdeadbeef;
|
|
*cs++ = MI_NOOP;
|
|
intel_ring_advance(rq, cs);
|
|
|
|
if ((dispatch_flags & I915_DISPATCH_PINNED) == 0) {
|
|
if (len > I830_BATCH_LIMIT)
|
|
return -ENOSPC;
|
|
|
|
cs = intel_ring_begin(rq, 6 + 2);
|
|
if (IS_ERR(cs))
|
|
return PTR_ERR(cs);
|
|
|
|
/* Blit the batch (which has now all relocs applied) to the
|
|
* stable batch scratch bo area (so that the CS never
|
|
* stumbles over its tlb invalidation bug) ...
|
|
*/
|
|
*cs++ = SRC_COPY_BLT_CMD | BLT_WRITE_RGBA;
|
|
*cs++ = BLT_DEPTH_32 | BLT_ROP_SRC_COPY | 4096;
|
|
*cs++ = DIV_ROUND_UP(len, 4096) << 16 | 4096;
|
|
*cs++ = cs_offset;
|
|
*cs++ = 4096;
|
|
*cs++ = offset;
|
|
|
|
*cs++ = MI_FLUSH;
|
|
*cs++ = MI_NOOP;
|
|
intel_ring_advance(rq, cs);
|
|
|
|
/* ... and execute it. */
|
|
offset = cs_offset;
|
|
}
|
|
|
|
cs = intel_ring_begin(rq, 2);
|
|
if (IS_ERR(cs))
|
|
return PTR_ERR(cs);
|
|
|
|
*cs++ = MI_BATCH_BUFFER_START | MI_BATCH_GTT;
|
|
*cs++ = offset | (dispatch_flags & I915_DISPATCH_SECURE ? 0 :
|
|
MI_BATCH_NON_SECURE);
|
|
intel_ring_advance(rq, cs);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
i915_emit_bb_start(struct i915_request *rq,
|
|
u64 offset, u32 len,
|
|
unsigned int dispatch_flags)
|
|
{
|
|
u32 *cs;
|
|
|
|
cs = intel_ring_begin(rq, 2);
|
|
if (IS_ERR(cs))
|
|
return PTR_ERR(cs);
|
|
|
|
*cs++ = MI_BATCH_BUFFER_START | MI_BATCH_GTT;
|
|
*cs++ = offset | (dispatch_flags & I915_DISPATCH_SECURE ? 0 :
|
|
MI_BATCH_NON_SECURE);
|
|
intel_ring_advance(rq, cs);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int intel_ring_pin(struct intel_ring *ring)
|
|
{
|
|
struct i915_vma *vma = ring->vma;
|
|
enum i915_map_type map =
|
|
HAS_LLC(vma->vm->i915) ? I915_MAP_WB : I915_MAP_WC;
|
|
unsigned int flags;
|
|
void *addr;
|
|
int ret;
|
|
|
|
GEM_BUG_ON(ring->vaddr);
|
|
|
|
flags = PIN_GLOBAL;
|
|
|
|
/* Ring wraparound at offset 0 sometimes hangs. No idea why. */
|
|
flags |= PIN_OFFSET_BIAS | i915_ggtt_pin_bias(vma);
|
|
|
|
if (vma->obj->stolen)
|
|
flags |= PIN_MAPPABLE;
|
|
else
|
|
flags |= PIN_HIGH;
|
|
|
|
if (!(vma->flags & I915_VMA_GLOBAL_BIND)) {
|
|
if (flags & PIN_MAPPABLE || map == I915_MAP_WC)
|
|
ret = i915_gem_object_set_to_gtt_domain(vma->obj, true);
|
|
else
|
|
ret = i915_gem_object_set_to_cpu_domain(vma->obj, true);
|
|
if (unlikely(ret))
|
|
return ret;
|
|
}
|
|
|
|
ret = i915_vma_pin(vma, 0, 0, flags);
|
|
if (unlikely(ret))
|
|
return ret;
|
|
|
|
if (i915_vma_is_map_and_fenceable(vma))
|
|
addr = (void __force *)i915_vma_pin_iomap(vma);
|
|
else
|
|
addr = i915_gem_object_pin_map(vma->obj, map);
|
|
if (IS_ERR(addr))
|
|
goto err;
|
|
|
|
vma->obj->pin_global++;
|
|
|
|
ring->vaddr = addr;
|
|
return 0;
|
|
|
|
err:
|
|
i915_vma_unpin(vma);
|
|
return PTR_ERR(addr);
|
|
}
|
|
|
|
void intel_ring_reset(struct intel_ring *ring, u32 tail)
|
|
{
|
|
GEM_BUG_ON(!intel_ring_offset_valid(ring, tail));
|
|
|
|
ring->tail = tail;
|
|
ring->head = tail;
|
|
ring->emit = tail;
|
|
intel_ring_update_space(ring);
|
|
}
|
|
|
|
void intel_ring_unpin(struct intel_ring *ring)
|
|
{
|
|
GEM_BUG_ON(!ring->vma);
|
|
GEM_BUG_ON(!ring->vaddr);
|
|
|
|
/* Discard any unused bytes beyond that submitted to hw. */
|
|
intel_ring_reset(ring, ring->tail);
|
|
|
|
if (i915_vma_is_map_and_fenceable(ring->vma))
|
|
i915_vma_unpin_iomap(ring->vma);
|
|
else
|
|
i915_gem_object_unpin_map(ring->vma->obj);
|
|
ring->vaddr = NULL;
|
|
|
|
ring->vma->obj->pin_global--;
|
|
i915_vma_unpin(ring->vma);
|
|
}
|
|
|
|
static struct i915_vma *
|
|
intel_ring_create_vma(struct drm_i915_private *dev_priv, int size)
|
|
{
|
|
struct i915_address_space *vm = &dev_priv->ggtt.vm;
|
|
struct drm_i915_gem_object *obj;
|
|
struct i915_vma *vma;
|
|
|
|
obj = i915_gem_object_create_stolen(dev_priv, size);
|
|
if (!obj)
|
|
obj = i915_gem_object_create_internal(dev_priv, size);
|
|
if (IS_ERR(obj))
|
|
return ERR_CAST(obj);
|
|
|
|
/*
|
|
* Mark ring buffers as read-only from GPU side (so no stray overwrites)
|
|
* if supported by the platform's GGTT.
|
|
*/
|
|
if (vm->has_read_only)
|
|
i915_gem_object_set_readonly(obj);
|
|
|
|
vma = i915_vma_instance(obj, vm, NULL);
|
|
if (IS_ERR(vma))
|
|
goto err;
|
|
|
|
return vma;
|
|
|
|
err:
|
|
i915_gem_object_put(obj);
|
|
return vma;
|
|
}
|
|
|
|
struct intel_ring *
|
|
intel_engine_create_ring(struct intel_engine_cs *engine,
|
|
struct i915_timeline *timeline,
|
|
int size)
|
|
{
|
|
struct intel_ring *ring;
|
|
struct i915_vma *vma;
|
|
|
|
GEM_BUG_ON(!is_power_of_2(size));
|
|
GEM_BUG_ON(RING_CTL_SIZE(size) & ~RING_NR_PAGES);
|
|
GEM_BUG_ON(timeline == &engine->timeline);
|
|
lockdep_assert_held(&engine->i915->drm.struct_mutex);
|
|
|
|
ring = kzalloc(sizeof(*ring), GFP_KERNEL);
|
|
if (!ring)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
INIT_LIST_HEAD(&ring->request_list);
|
|
ring->timeline = i915_timeline_get(timeline);
|
|
|
|
ring->size = size;
|
|
/* Workaround an erratum on the i830 which causes a hang if
|
|
* the TAIL pointer points to within the last 2 cachelines
|
|
* of the buffer.
|
|
*/
|
|
ring->effective_size = size;
|
|
if (IS_I830(engine->i915) || IS_I845G(engine->i915))
|
|
ring->effective_size -= 2 * CACHELINE_BYTES;
|
|
|
|
intel_ring_update_space(ring);
|
|
|
|
vma = intel_ring_create_vma(engine->i915, size);
|
|
if (IS_ERR(vma)) {
|
|
kfree(ring);
|
|
return ERR_CAST(vma);
|
|
}
|
|
ring->vma = vma;
|
|
|
|
return ring;
|
|
}
|
|
|
|
void
|
|
intel_ring_free(struct intel_ring *ring)
|
|
{
|
|
struct drm_i915_gem_object *obj = ring->vma->obj;
|
|
|
|
i915_vma_close(ring->vma);
|
|
__i915_gem_object_release_unless_active(obj);
|
|
|
|
i915_timeline_put(ring->timeline);
|
|
kfree(ring);
|
|
}
|
|
|
|
static void intel_ring_context_destroy(struct intel_context *ce)
|
|
{
|
|
GEM_BUG_ON(ce->pin_count);
|
|
|
|
if (!ce->state)
|
|
return;
|
|
|
|
GEM_BUG_ON(i915_gem_object_is_active(ce->state->obj));
|
|
i915_gem_object_put(ce->state->obj);
|
|
}
|
|
|
|
static int __context_pin_ppgtt(struct i915_gem_context *ctx)
|
|
{
|
|
struct i915_hw_ppgtt *ppgtt;
|
|
int err = 0;
|
|
|
|
ppgtt = ctx->ppgtt ?: ctx->i915->mm.aliasing_ppgtt;
|
|
if (ppgtt)
|
|
err = gen6_ppgtt_pin(ppgtt);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void __context_unpin_ppgtt(struct i915_gem_context *ctx)
|
|
{
|
|
struct i915_hw_ppgtt *ppgtt;
|
|
|
|
ppgtt = ctx->ppgtt ?: ctx->i915->mm.aliasing_ppgtt;
|
|
if (ppgtt)
|
|
gen6_ppgtt_unpin(ppgtt);
|
|
}
|
|
|
|
static int __context_pin(struct intel_context *ce)
|
|
{
|
|
struct i915_vma *vma;
|
|
int err;
|
|
|
|
vma = ce->state;
|
|
if (!vma)
|
|
return 0;
|
|
|
|
/*
|
|
* Clear this page out of any CPU caches for coherent swap-in/out.
|
|
* We only want to do this on the first bind so that we do not stall
|
|
* on an active context (which by nature is already on the GPU).
|
|
*/
|
|
if (!(vma->flags & I915_VMA_GLOBAL_BIND)) {
|
|
err = i915_gem_object_set_to_gtt_domain(vma->obj, true);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
err = i915_vma_pin(vma, 0, 0, PIN_GLOBAL | PIN_HIGH);
|
|
if (err)
|
|
return err;
|
|
|
|
/*
|
|
* And mark is as a globally pinned object to let the shrinker know
|
|
* it cannot reclaim the object until we release it.
|
|
*/
|
|
vma->obj->pin_global++;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __context_unpin(struct intel_context *ce)
|
|
{
|
|
struct i915_vma *vma;
|
|
|
|
vma = ce->state;
|
|
if (!vma)
|
|
return;
|
|
|
|
vma->obj->pin_global--;
|
|
i915_vma_unpin(vma);
|
|
}
|
|
|
|
static void intel_ring_context_unpin(struct intel_context *ce)
|
|
{
|
|
__context_unpin_ppgtt(ce->gem_context);
|
|
__context_unpin(ce);
|
|
|
|
i915_gem_context_put(ce->gem_context);
|
|
}
|
|
|
|
static struct i915_vma *
|
|
alloc_context_vma(struct intel_engine_cs *engine)
|
|
{
|
|
struct drm_i915_private *i915 = engine->i915;
|
|
struct drm_i915_gem_object *obj;
|
|
struct i915_vma *vma;
|
|
int err;
|
|
|
|
obj = i915_gem_object_create(i915, engine->context_size);
|
|
if (IS_ERR(obj))
|
|
return ERR_CAST(obj);
|
|
|
|
if (engine->default_state) {
|
|
void *defaults, *vaddr;
|
|
|
|
vaddr = i915_gem_object_pin_map(obj, I915_MAP_WB);
|
|
if (IS_ERR(vaddr)) {
|
|
err = PTR_ERR(vaddr);
|
|
goto err_obj;
|
|
}
|
|
|
|
defaults = i915_gem_object_pin_map(engine->default_state,
|
|
I915_MAP_WB);
|
|
if (IS_ERR(defaults)) {
|
|
err = PTR_ERR(defaults);
|
|
goto err_map;
|
|
}
|
|
|
|
memcpy(vaddr, defaults, engine->context_size);
|
|
|
|
i915_gem_object_unpin_map(engine->default_state);
|
|
i915_gem_object_unpin_map(obj);
|
|
}
|
|
|
|
/*
|
|
* Try to make the context utilize L3 as well as LLC.
|
|
*
|
|
* On VLV we don't have L3 controls in the PTEs so we
|
|
* shouldn't touch the cache level, especially as that
|
|
* would make the object snooped which might have a
|
|
* negative performance impact.
|
|
*
|
|
* Snooping is required on non-llc platforms in execlist
|
|
* mode, but since all GGTT accesses use PAT entry 0 we
|
|
* get snooping anyway regardless of cache_level.
|
|
*
|
|
* This is only applicable for Ivy Bridge devices since
|
|
* later platforms don't have L3 control bits in the PTE.
|
|
*/
|
|
if (IS_IVYBRIDGE(i915)) {
|
|
/* Ignore any error, regard it as a simple optimisation */
|
|
i915_gem_object_set_cache_level(obj, I915_CACHE_L3_LLC);
|
|
}
|
|
|
|
vma = i915_vma_instance(obj, &i915->ggtt.vm, NULL);
|
|
if (IS_ERR(vma)) {
|
|
err = PTR_ERR(vma);
|
|
goto err_obj;
|
|
}
|
|
|
|
return vma;
|
|
|
|
err_map:
|
|
i915_gem_object_unpin_map(obj);
|
|
err_obj:
|
|
i915_gem_object_put(obj);
|
|
return ERR_PTR(err);
|
|
}
|
|
|
|
static struct intel_context *
|
|
__ring_context_pin(struct intel_engine_cs *engine,
|
|
struct i915_gem_context *ctx,
|
|
struct intel_context *ce)
|
|
{
|
|
int err;
|
|
|
|
if (!ce->state && engine->context_size) {
|
|
struct i915_vma *vma;
|
|
|
|
vma = alloc_context_vma(engine);
|
|
if (IS_ERR(vma)) {
|
|
err = PTR_ERR(vma);
|
|
goto err;
|
|
}
|
|
|
|
ce->state = vma;
|
|
}
|
|
|
|
err = __context_pin(ce);
|
|
if (err)
|
|
goto err;
|
|
|
|
err = __context_pin_ppgtt(ce->gem_context);
|
|
if (err)
|
|
goto err_unpin;
|
|
|
|
i915_gem_context_get(ctx);
|
|
|
|
/* One ringbuffer to rule them all */
|
|
GEM_BUG_ON(!engine->buffer);
|
|
ce->ring = engine->buffer;
|
|
|
|
return ce;
|
|
|
|
err_unpin:
|
|
__context_unpin(ce);
|
|
err:
|
|
ce->pin_count = 0;
|
|
return ERR_PTR(err);
|
|
}
|
|
|
|
static const struct intel_context_ops ring_context_ops = {
|
|
.unpin = intel_ring_context_unpin,
|
|
.destroy = intel_ring_context_destroy,
|
|
};
|
|
|
|
static struct intel_context *
|
|
intel_ring_context_pin(struct intel_engine_cs *engine,
|
|
struct i915_gem_context *ctx)
|
|
{
|
|
struct intel_context *ce = to_intel_context(ctx, engine);
|
|
|
|
lockdep_assert_held(&ctx->i915->drm.struct_mutex);
|
|
|
|
if (likely(ce->pin_count++))
|
|
return ce;
|
|
GEM_BUG_ON(!ce->pin_count); /* no overflow please! */
|
|
|
|
ce->ops = &ring_context_ops;
|
|
|
|
return __ring_context_pin(engine, ctx, ce);
|
|
}
|
|
|
|
static int intel_init_ring_buffer(struct intel_engine_cs *engine)
|
|
{
|
|
struct i915_timeline *timeline;
|
|
struct intel_ring *ring;
|
|
unsigned int size;
|
|
int err;
|
|
|
|
intel_engine_setup_common(engine);
|
|
|
|
timeline = i915_timeline_create(engine->i915, engine->name);
|
|
if (IS_ERR(timeline)) {
|
|
err = PTR_ERR(timeline);
|
|
goto err;
|
|
}
|
|
|
|
ring = intel_engine_create_ring(engine, timeline, 32 * PAGE_SIZE);
|
|
i915_timeline_put(timeline);
|
|
if (IS_ERR(ring)) {
|
|
err = PTR_ERR(ring);
|
|
goto err;
|
|
}
|
|
|
|
err = intel_ring_pin(ring);
|
|
if (err)
|
|
goto err_ring;
|
|
|
|
GEM_BUG_ON(engine->buffer);
|
|
engine->buffer = ring;
|
|
|
|
size = PAGE_SIZE;
|
|
if (HAS_BROKEN_CS_TLB(engine->i915))
|
|
size = I830_WA_SIZE;
|
|
err = intel_engine_create_scratch(engine, size);
|
|
if (err)
|
|
goto err_unpin;
|
|
|
|
err = intel_engine_init_common(engine);
|
|
if (err)
|
|
goto err_scratch;
|
|
|
|
return 0;
|
|
|
|
err_scratch:
|
|
intel_engine_cleanup_scratch(engine);
|
|
err_unpin:
|
|
intel_ring_unpin(ring);
|
|
err_ring:
|
|
intel_ring_free(ring);
|
|
err:
|
|
intel_engine_cleanup_common(engine);
|
|
return err;
|
|
}
|
|
|
|
void intel_engine_cleanup(struct intel_engine_cs *engine)
|
|
{
|
|
struct drm_i915_private *dev_priv = engine->i915;
|
|
|
|
WARN_ON(INTEL_GEN(dev_priv) > 2 &&
|
|
(I915_READ_MODE(engine) & MODE_IDLE) == 0);
|
|
|
|
intel_ring_unpin(engine->buffer);
|
|
intel_ring_free(engine->buffer);
|
|
|
|
if (engine->cleanup)
|
|
engine->cleanup(engine);
|
|
|
|
intel_engine_cleanup_common(engine);
|
|
|
|
dev_priv->engine[engine->id] = NULL;
|
|
kfree(engine);
|
|
}
|
|
|
|
void intel_legacy_submission_resume(struct drm_i915_private *dev_priv)
|
|
{
|
|
struct intel_engine_cs *engine;
|
|
enum intel_engine_id id;
|
|
|
|
/* Restart from the beginning of the rings for convenience */
|
|
for_each_engine(engine, dev_priv, id)
|
|
intel_ring_reset(engine->buffer, 0);
|
|
}
|
|
|
|
static int load_pd_dir(struct i915_request *rq,
|
|
const struct i915_hw_ppgtt *ppgtt)
|
|
{
|
|
const struct intel_engine_cs * const engine = rq->engine;
|
|
u32 *cs;
|
|
|
|
cs = intel_ring_begin(rq, 6);
|
|
if (IS_ERR(cs))
|
|
return PTR_ERR(cs);
|
|
|
|
*cs++ = MI_LOAD_REGISTER_IMM(1);
|
|
*cs++ = i915_mmio_reg_offset(RING_PP_DIR_DCLV(engine));
|
|
*cs++ = PP_DIR_DCLV_2G;
|
|
|
|
*cs++ = MI_LOAD_REGISTER_IMM(1);
|
|
*cs++ = i915_mmio_reg_offset(RING_PP_DIR_BASE(engine));
|
|
*cs++ = ppgtt->pd.base.ggtt_offset << 10;
|
|
|
|
intel_ring_advance(rq, cs);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int flush_pd_dir(struct i915_request *rq)
|
|
{
|
|
const struct intel_engine_cs * const engine = rq->engine;
|
|
u32 *cs;
|
|
|
|
cs = intel_ring_begin(rq, 4);
|
|
if (IS_ERR(cs))
|
|
return PTR_ERR(cs);
|
|
|
|
/* Stall until the page table load is complete */
|
|
*cs++ = MI_STORE_REGISTER_MEM | MI_SRM_LRM_GLOBAL_GTT;
|
|
*cs++ = i915_mmio_reg_offset(RING_PP_DIR_BASE(engine));
|
|
*cs++ = i915_ggtt_offset(engine->scratch);
|
|
*cs++ = MI_NOOP;
|
|
|
|
intel_ring_advance(rq, cs);
|
|
return 0;
|
|
}
|
|
|
|
static inline int mi_set_context(struct i915_request *rq, u32 flags)
|
|
{
|
|
struct drm_i915_private *i915 = rq->i915;
|
|
struct intel_engine_cs *engine = rq->engine;
|
|
enum intel_engine_id id;
|
|
const int num_rings =
|
|
/* Use an extended w/a on gen7 if signalling from other rings */
|
|
(HAS_LEGACY_SEMAPHORES(i915) && IS_GEN7(i915)) ?
|
|
INTEL_INFO(i915)->num_rings - 1 :
|
|
0;
|
|
bool force_restore = false;
|
|
int len;
|
|
u32 *cs;
|
|
|
|
flags |= MI_MM_SPACE_GTT;
|
|
if (IS_HASWELL(i915))
|
|
/* These flags are for resource streamer on HSW+ */
|
|
flags |= HSW_MI_RS_SAVE_STATE_EN | HSW_MI_RS_RESTORE_STATE_EN;
|
|
else
|
|
flags |= MI_SAVE_EXT_STATE_EN | MI_RESTORE_EXT_STATE_EN;
|
|
|
|
len = 4;
|
|
if (IS_GEN7(i915))
|
|
len += 2 + (num_rings ? 4*num_rings + 6 : 0);
|
|
if (flags & MI_FORCE_RESTORE) {
|
|
GEM_BUG_ON(flags & MI_RESTORE_INHIBIT);
|
|
flags &= ~MI_FORCE_RESTORE;
|
|
force_restore = true;
|
|
len += 2;
|
|
}
|
|
|
|
cs = intel_ring_begin(rq, len);
|
|
if (IS_ERR(cs))
|
|
return PTR_ERR(cs);
|
|
|
|
/* WaProgramMiArbOnOffAroundMiSetContext:ivb,vlv,hsw,bdw,chv */
|
|
if (IS_GEN7(i915)) {
|
|
*cs++ = MI_ARB_ON_OFF | MI_ARB_DISABLE;
|
|
if (num_rings) {
|
|
struct intel_engine_cs *signaller;
|
|
|
|
*cs++ = MI_LOAD_REGISTER_IMM(num_rings);
|
|
for_each_engine(signaller, i915, id) {
|
|
if (signaller == engine)
|
|
continue;
|
|
|
|
*cs++ = i915_mmio_reg_offset(
|
|
RING_PSMI_CTL(signaller->mmio_base));
|
|
*cs++ = _MASKED_BIT_ENABLE(
|
|
GEN6_PSMI_SLEEP_MSG_DISABLE);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (force_restore) {
|
|
/*
|
|
* The HW doesn't handle being told to restore the current
|
|
* context very well. Quite often it likes goes to go off and
|
|
* sulk, especially when it is meant to be reloading PP_DIR.
|
|
* A very simple fix to force the reload is to simply switch
|
|
* away from the current context and back again.
|
|
*
|
|
* Note that the kernel_context will contain random state
|
|
* following the INHIBIT_RESTORE. We accept this since we
|
|
* never use the kernel_context state; it is merely a
|
|
* placeholder we use to flush other contexts.
|
|
*/
|
|
*cs++ = MI_SET_CONTEXT;
|
|
*cs++ = i915_ggtt_offset(to_intel_context(i915->kernel_context,
|
|
engine)->state) |
|
|
MI_MM_SPACE_GTT |
|
|
MI_RESTORE_INHIBIT;
|
|
}
|
|
|
|
*cs++ = MI_NOOP;
|
|
*cs++ = MI_SET_CONTEXT;
|
|
*cs++ = i915_ggtt_offset(rq->hw_context->state) | flags;
|
|
/*
|
|
* w/a: MI_SET_CONTEXT must always be followed by MI_NOOP
|
|
* WaMiSetContext_Hang:snb,ivb,vlv
|
|
*/
|
|
*cs++ = MI_NOOP;
|
|
|
|
if (IS_GEN7(i915)) {
|
|
if (num_rings) {
|
|
struct intel_engine_cs *signaller;
|
|
i915_reg_t last_reg = {}; /* keep gcc quiet */
|
|
|
|
*cs++ = MI_LOAD_REGISTER_IMM(num_rings);
|
|
for_each_engine(signaller, i915, id) {
|
|
if (signaller == engine)
|
|
continue;
|
|
|
|
last_reg = RING_PSMI_CTL(signaller->mmio_base);
|
|
*cs++ = i915_mmio_reg_offset(last_reg);
|
|
*cs++ = _MASKED_BIT_DISABLE(
|
|
GEN6_PSMI_SLEEP_MSG_DISABLE);
|
|
}
|
|
|
|
/* Insert a delay before the next switch! */
|
|
*cs++ = MI_STORE_REGISTER_MEM | MI_SRM_LRM_GLOBAL_GTT;
|
|
*cs++ = i915_mmio_reg_offset(last_reg);
|
|
*cs++ = i915_ggtt_offset(engine->scratch);
|
|
*cs++ = MI_NOOP;
|
|
}
|
|
*cs++ = MI_ARB_ON_OFF | MI_ARB_ENABLE;
|
|
}
|
|
|
|
intel_ring_advance(rq, cs);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int remap_l3(struct i915_request *rq, int slice)
|
|
{
|
|
u32 *cs, *remap_info = rq->i915->l3_parity.remap_info[slice];
|
|
int i;
|
|
|
|
if (!remap_info)
|
|
return 0;
|
|
|
|
cs = intel_ring_begin(rq, GEN7_L3LOG_SIZE/4 * 2 + 2);
|
|
if (IS_ERR(cs))
|
|
return PTR_ERR(cs);
|
|
|
|
/*
|
|
* Note: We do not worry about the concurrent register cacheline hang
|
|
* here because no other code should access these registers other than
|
|
* at initialization time.
|
|
*/
|
|
*cs++ = MI_LOAD_REGISTER_IMM(GEN7_L3LOG_SIZE/4);
|
|
for (i = 0; i < GEN7_L3LOG_SIZE/4; i++) {
|
|
*cs++ = i915_mmio_reg_offset(GEN7_L3LOG(slice, i));
|
|
*cs++ = remap_info[i];
|
|
}
|
|
*cs++ = MI_NOOP;
|
|
intel_ring_advance(rq, cs);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int switch_context(struct i915_request *rq)
|
|
{
|
|
struct intel_engine_cs *engine = rq->engine;
|
|
struct i915_gem_context *ctx = rq->gem_context;
|
|
struct i915_hw_ppgtt *ppgtt = ctx->ppgtt ?: rq->i915->mm.aliasing_ppgtt;
|
|
unsigned int unwind_mm = 0;
|
|
u32 hw_flags = 0;
|
|
int ret, i;
|
|
|
|
lockdep_assert_held(&rq->i915->drm.struct_mutex);
|
|
GEM_BUG_ON(HAS_EXECLISTS(rq->i915));
|
|
|
|
if (ppgtt) {
|
|
int loops;
|
|
|
|
/*
|
|
* Baytail takes a little more convincing that it really needs
|
|
* to reload the PD between contexts. It is not just a little
|
|
* longer, as adding more stalls after the load_pd_dir (i.e.
|
|
* adding a long loop around flush_pd_dir) is not as effective
|
|
* as reloading the PD umpteen times. 32 is derived from
|
|
* experimentation (gem_exec_parallel/fds) and has no good
|
|
* explanation.
|
|
*/
|
|
loops = 1;
|
|
if (engine->id == BCS && IS_VALLEYVIEW(engine->i915))
|
|
loops = 32;
|
|
|
|
do {
|
|
ret = load_pd_dir(rq, ppgtt);
|
|
if (ret)
|
|
goto err;
|
|
} while (--loops);
|
|
|
|
if (intel_engine_flag(engine) & ppgtt->pd_dirty_rings) {
|
|
unwind_mm = intel_engine_flag(engine);
|
|
ppgtt->pd_dirty_rings &= ~unwind_mm;
|
|
hw_flags = MI_FORCE_RESTORE;
|
|
}
|
|
}
|
|
|
|
if (rq->hw_context->state) {
|
|
GEM_BUG_ON(engine->id != RCS);
|
|
|
|
/*
|
|
* The kernel context(s) is treated as pure scratch and is not
|
|
* expected to retain any state (as we sacrifice it during
|
|
* suspend and on resume it may be corrupted). This is ok,
|
|
* as nothing actually executes using the kernel context; it
|
|
* is purely used for flushing user contexts.
|
|
*/
|
|
if (i915_gem_context_is_kernel(ctx))
|
|
hw_flags = MI_RESTORE_INHIBIT;
|
|
|
|
ret = mi_set_context(rq, hw_flags);
|
|
if (ret)
|
|
goto err_mm;
|
|
}
|
|
|
|
if (ppgtt) {
|
|
ret = engine->emit_flush(rq, EMIT_INVALIDATE);
|
|
if (ret)
|
|
goto err_mm;
|
|
|
|
ret = flush_pd_dir(rq);
|
|
if (ret)
|
|
goto err_mm;
|
|
|
|
/*
|
|
* Not only do we need a full barrier (post-sync write) after
|
|
* invalidating the TLBs, but we need to wait a little bit
|
|
* longer. Whether this is merely delaying us, or the
|
|
* subsequent flush is a key part of serialising with the
|
|
* post-sync op, this extra pass appears vital before a
|
|
* mm switch!
|
|
*/
|
|
ret = engine->emit_flush(rq, EMIT_INVALIDATE);
|
|
if (ret)
|
|
goto err_mm;
|
|
|
|
ret = engine->emit_flush(rq, EMIT_FLUSH);
|
|
if (ret)
|
|
goto err_mm;
|
|
}
|
|
|
|
if (ctx->remap_slice) {
|
|
for (i = 0; i < MAX_L3_SLICES; i++) {
|
|
if (!(ctx->remap_slice & BIT(i)))
|
|
continue;
|
|
|
|
ret = remap_l3(rq, i);
|
|
if (ret)
|
|
goto err_mm;
|
|
}
|
|
|
|
ctx->remap_slice = 0;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_mm:
|
|
if (unwind_mm)
|
|
ppgtt->pd_dirty_rings |= unwind_mm;
|
|
err:
|
|
return ret;
|
|
}
|
|
|
|
static int ring_request_alloc(struct i915_request *request)
|
|
{
|
|
int ret;
|
|
|
|
GEM_BUG_ON(!request->hw_context->pin_count);
|
|
|
|
/* Flush enough space to reduce the likelihood of waiting after
|
|
* we start building the request - in which case we will just
|
|
* have to repeat work.
|
|
*/
|
|
request->reserved_space += LEGACY_REQUEST_SIZE;
|
|
|
|
ret = intel_ring_wait_for_space(request->ring, request->reserved_space);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = switch_context(request);
|
|
if (ret)
|
|
return ret;
|
|
|
|
request->reserved_space -= LEGACY_REQUEST_SIZE;
|
|
return 0;
|
|
}
|
|
|
|
static noinline int wait_for_space(struct intel_ring *ring, unsigned int bytes)
|
|
{
|
|
struct i915_request *target;
|
|
long timeout;
|
|
|
|
lockdep_assert_held(&ring->vma->vm->i915->drm.struct_mutex);
|
|
|
|
if (intel_ring_update_space(ring) >= bytes)
|
|
return 0;
|
|
|
|
GEM_BUG_ON(list_empty(&ring->request_list));
|
|
list_for_each_entry(target, &ring->request_list, ring_link) {
|
|
/* Would completion of this request free enough space? */
|
|
if (bytes <= __intel_ring_space(target->postfix,
|
|
ring->emit, ring->size))
|
|
break;
|
|
}
|
|
|
|
if (WARN_ON(&target->ring_link == &ring->request_list))
|
|
return -ENOSPC;
|
|
|
|
timeout = i915_request_wait(target,
|
|
I915_WAIT_INTERRUPTIBLE | I915_WAIT_LOCKED,
|
|
MAX_SCHEDULE_TIMEOUT);
|
|
if (timeout < 0)
|
|
return timeout;
|
|
|
|
i915_request_retire_upto(target);
|
|
|
|
intel_ring_update_space(ring);
|
|
GEM_BUG_ON(ring->space < bytes);
|
|
return 0;
|
|
}
|
|
|
|
int intel_ring_wait_for_space(struct intel_ring *ring, unsigned int bytes)
|
|
{
|
|
GEM_BUG_ON(bytes > ring->effective_size);
|
|
if (unlikely(bytes > ring->effective_size - ring->emit))
|
|
bytes += ring->size - ring->emit;
|
|
|
|
if (unlikely(bytes > ring->space)) {
|
|
int ret = wait_for_space(ring, bytes);
|
|
if (unlikely(ret))
|
|
return ret;
|
|
}
|
|
|
|
GEM_BUG_ON(ring->space < bytes);
|
|
return 0;
|
|
}
|
|
|
|
u32 *intel_ring_begin(struct i915_request *rq, unsigned int num_dwords)
|
|
{
|
|
struct intel_ring *ring = rq->ring;
|
|
const unsigned int remain_usable = ring->effective_size - ring->emit;
|
|
const unsigned int bytes = num_dwords * sizeof(u32);
|
|
unsigned int need_wrap = 0;
|
|
unsigned int total_bytes;
|
|
u32 *cs;
|
|
|
|
/* Packets must be qword aligned. */
|
|
GEM_BUG_ON(num_dwords & 1);
|
|
|
|
total_bytes = bytes + rq->reserved_space;
|
|
GEM_BUG_ON(total_bytes > ring->effective_size);
|
|
|
|
if (unlikely(total_bytes > remain_usable)) {
|
|
const int remain_actual = ring->size - ring->emit;
|
|
|
|
if (bytes > remain_usable) {
|
|
/*
|
|
* Not enough space for the basic request. So need to
|
|
* flush out the remainder and then wait for
|
|
* base + reserved.
|
|
*/
|
|
total_bytes += remain_actual;
|
|
need_wrap = remain_actual | 1;
|
|
} else {
|
|
/*
|
|
* The base request will fit but the reserved space
|
|
* falls off the end. So we don't need an immediate
|
|
* wrap and only need to effectively wait for the
|
|
* reserved size from the start of ringbuffer.
|
|
*/
|
|
total_bytes = rq->reserved_space + remain_actual;
|
|
}
|
|
}
|
|
|
|
if (unlikely(total_bytes > ring->space)) {
|
|
int ret;
|
|
|
|
/*
|
|
* Space is reserved in the ringbuffer for finalising the
|
|
* request, as that cannot be allowed to fail. During request
|
|
* finalisation, reserved_space is set to 0 to stop the
|
|
* overallocation and the assumption is that then we never need
|
|
* to wait (which has the risk of failing with EINTR).
|
|
*
|
|
* See also i915_request_alloc() and i915_request_add().
|
|
*/
|
|
GEM_BUG_ON(!rq->reserved_space);
|
|
|
|
ret = wait_for_space(ring, total_bytes);
|
|
if (unlikely(ret))
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
if (unlikely(need_wrap)) {
|
|
need_wrap &= ~1;
|
|
GEM_BUG_ON(need_wrap > ring->space);
|
|
GEM_BUG_ON(ring->emit + need_wrap > ring->size);
|
|
GEM_BUG_ON(!IS_ALIGNED(need_wrap, sizeof(u64)));
|
|
|
|
/* Fill the tail with MI_NOOP */
|
|
memset64(ring->vaddr + ring->emit, 0, need_wrap / sizeof(u64));
|
|
ring->space -= need_wrap;
|
|
ring->emit = 0;
|
|
}
|
|
|
|
GEM_BUG_ON(ring->emit > ring->size - bytes);
|
|
GEM_BUG_ON(ring->space < bytes);
|
|
cs = ring->vaddr + ring->emit;
|
|
GEM_DEBUG_EXEC(memset32(cs, POISON_INUSE, bytes / sizeof(*cs)));
|
|
ring->emit += bytes;
|
|
ring->space -= bytes;
|
|
|
|
return cs;
|
|
}
|
|
|
|
/* Align the ring tail to a cacheline boundary */
|
|
int intel_ring_cacheline_align(struct i915_request *rq)
|
|
{
|
|
int num_dwords;
|
|
void *cs;
|
|
|
|
num_dwords = (rq->ring->emit & (CACHELINE_BYTES - 1)) / sizeof(u32);
|
|
if (num_dwords == 0)
|
|
return 0;
|
|
|
|
num_dwords = CACHELINE_DWORDS - num_dwords;
|
|
GEM_BUG_ON(num_dwords & 1);
|
|
|
|
cs = intel_ring_begin(rq, num_dwords);
|
|
if (IS_ERR(cs))
|
|
return PTR_ERR(cs);
|
|
|
|
memset64(cs, (u64)MI_NOOP << 32 | MI_NOOP, num_dwords / 2);
|
|
intel_ring_advance(rq, cs);
|
|
|
|
GEM_BUG_ON(rq->ring->emit & (CACHELINE_BYTES - 1));
|
|
return 0;
|
|
}
|
|
|
|
static void gen6_bsd_submit_request(struct i915_request *request)
|
|
{
|
|
struct drm_i915_private *dev_priv = request->i915;
|
|
|
|
intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
|
|
|
|
/* Every tail move must follow the sequence below */
|
|
|
|
/* Disable notification that the ring is IDLE. The GT
|
|
* will then assume that it is busy and bring it out of rc6.
|
|
*/
|
|
I915_WRITE_FW(GEN6_BSD_SLEEP_PSMI_CONTROL,
|
|
_MASKED_BIT_ENABLE(GEN6_BSD_SLEEP_MSG_DISABLE));
|
|
|
|
/* Clear the context id. Here be magic! */
|
|
I915_WRITE64_FW(GEN6_BSD_RNCID, 0x0);
|
|
|
|
/* Wait for the ring not to be idle, i.e. for it to wake up. */
|
|
if (__intel_wait_for_register_fw(dev_priv,
|
|
GEN6_BSD_SLEEP_PSMI_CONTROL,
|
|
GEN6_BSD_SLEEP_INDICATOR,
|
|
0,
|
|
1000, 0, NULL))
|
|
DRM_ERROR("timed out waiting for the BSD ring to wake up\n");
|
|
|
|
/* Now that the ring is fully powered up, update the tail */
|
|
i9xx_submit_request(request);
|
|
|
|
/* Let the ring send IDLE messages to the GT again,
|
|
* and so let it sleep to conserve power when idle.
|
|
*/
|
|
I915_WRITE_FW(GEN6_BSD_SLEEP_PSMI_CONTROL,
|
|
_MASKED_BIT_DISABLE(GEN6_BSD_SLEEP_MSG_DISABLE));
|
|
|
|
intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
|
|
}
|
|
|
|
static int mi_flush_dw(struct i915_request *rq, u32 flags)
|
|
{
|
|
u32 cmd, *cs;
|
|
|
|
cs = intel_ring_begin(rq, 4);
|
|
if (IS_ERR(cs))
|
|
return PTR_ERR(cs);
|
|
|
|
cmd = MI_FLUSH_DW;
|
|
|
|
/*
|
|
* We always require a command barrier so that subsequent
|
|
* commands, such as breadcrumb interrupts, are strictly ordered
|
|
* wrt the contents of the write cache being flushed to memory
|
|
* (and thus being coherent from the CPU).
|
|
*/
|
|
cmd |= MI_FLUSH_DW_STORE_INDEX | MI_FLUSH_DW_OP_STOREDW;
|
|
|
|
/*
|
|
* Bspec vol 1c.3 - blitter engine command streamer:
|
|
* "If ENABLED, all TLBs will be invalidated once the flush
|
|
* operation is complete. This bit is only valid when the
|
|
* Post-Sync Operation field is a value of 1h or 3h."
|
|
*/
|
|
cmd |= flags;
|
|
|
|
*cs++ = cmd;
|
|
*cs++ = I915_GEM_HWS_SCRATCH_ADDR | MI_FLUSH_DW_USE_GTT;
|
|
*cs++ = 0;
|
|
*cs++ = MI_NOOP;
|
|
|
|
intel_ring_advance(rq, cs);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int gen6_flush_dw(struct i915_request *rq, u32 mode, u32 invflags)
|
|
{
|
|
return mi_flush_dw(rq, mode & EMIT_INVALIDATE ? invflags : 0);
|
|
}
|
|
|
|
static int gen6_bsd_ring_flush(struct i915_request *rq, u32 mode)
|
|
{
|
|
return gen6_flush_dw(rq, mode, MI_INVALIDATE_TLB | MI_INVALIDATE_BSD);
|
|
}
|
|
|
|
static int
|
|
hsw_emit_bb_start(struct i915_request *rq,
|
|
u64 offset, u32 len,
|
|
unsigned int dispatch_flags)
|
|
{
|
|
u32 *cs;
|
|
|
|
cs = intel_ring_begin(rq, 2);
|
|
if (IS_ERR(cs))
|
|
return PTR_ERR(cs);
|
|
|
|
*cs++ = MI_BATCH_BUFFER_START | (dispatch_flags & I915_DISPATCH_SECURE ?
|
|
0 : MI_BATCH_PPGTT_HSW | MI_BATCH_NON_SECURE_HSW);
|
|
/* bit0-7 is the length on GEN6+ */
|
|
*cs++ = offset;
|
|
intel_ring_advance(rq, cs);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
gen6_emit_bb_start(struct i915_request *rq,
|
|
u64 offset, u32 len,
|
|
unsigned int dispatch_flags)
|
|
{
|
|
u32 *cs;
|
|
|
|
cs = intel_ring_begin(rq, 2);
|
|
if (IS_ERR(cs))
|
|
return PTR_ERR(cs);
|
|
|
|
*cs++ = MI_BATCH_BUFFER_START | (dispatch_flags & I915_DISPATCH_SECURE ?
|
|
0 : MI_BATCH_NON_SECURE_I965);
|
|
/* bit0-7 is the length on GEN6+ */
|
|
*cs++ = offset;
|
|
intel_ring_advance(rq, cs);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Blitter support (SandyBridge+) */
|
|
|
|
static int gen6_ring_flush(struct i915_request *rq, u32 mode)
|
|
{
|
|
return gen6_flush_dw(rq, mode, MI_INVALIDATE_TLB);
|
|
}
|
|
|
|
static void intel_ring_init_semaphores(struct drm_i915_private *dev_priv,
|
|
struct intel_engine_cs *engine)
|
|
{
|
|
int i;
|
|
|
|
if (!HAS_LEGACY_SEMAPHORES(dev_priv))
|
|
return;
|
|
|
|
GEM_BUG_ON(INTEL_GEN(dev_priv) < 6);
|
|
engine->semaphore.sync_to = gen6_ring_sync_to;
|
|
engine->semaphore.signal = gen6_signal;
|
|
|
|
/*
|
|
* The current semaphore is only applied on pre-gen8
|
|
* platform. And there is no VCS2 ring on the pre-gen8
|
|
* platform. So the semaphore between RCS and VCS2 is
|
|
* initialized as INVALID.
|
|
*/
|
|
for (i = 0; i < GEN6_NUM_SEMAPHORES; i++) {
|
|
static const struct {
|
|
u32 wait_mbox;
|
|
i915_reg_t mbox_reg;
|
|
} sem_data[GEN6_NUM_SEMAPHORES][GEN6_NUM_SEMAPHORES] = {
|
|
[RCS_HW] = {
|
|
[VCS_HW] = { .wait_mbox = MI_SEMAPHORE_SYNC_RV, .mbox_reg = GEN6_VRSYNC },
|
|
[BCS_HW] = { .wait_mbox = MI_SEMAPHORE_SYNC_RB, .mbox_reg = GEN6_BRSYNC },
|
|
[VECS_HW] = { .wait_mbox = MI_SEMAPHORE_SYNC_RVE, .mbox_reg = GEN6_VERSYNC },
|
|
},
|
|
[VCS_HW] = {
|
|
[RCS_HW] = { .wait_mbox = MI_SEMAPHORE_SYNC_VR, .mbox_reg = GEN6_RVSYNC },
|
|
[BCS_HW] = { .wait_mbox = MI_SEMAPHORE_SYNC_VB, .mbox_reg = GEN6_BVSYNC },
|
|
[VECS_HW] = { .wait_mbox = MI_SEMAPHORE_SYNC_VVE, .mbox_reg = GEN6_VEVSYNC },
|
|
},
|
|
[BCS_HW] = {
|
|
[RCS_HW] = { .wait_mbox = MI_SEMAPHORE_SYNC_BR, .mbox_reg = GEN6_RBSYNC },
|
|
[VCS_HW] = { .wait_mbox = MI_SEMAPHORE_SYNC_BV, .mbox_reg = GEN6_VBSYNC },
|
|
[VECS_HW] = { .wait_mbox = MI_SEMAPHORE_SYNC_BVE, .mbox_reg = GEN6_VEBSYNC },
|
|
},
|
|
[VECS_HW] = {
|
|
[RCS_HW] = { .wait_mbox = MI_SEMAPHORE_SYNC_VER, .mbox_reg = GEN6_RVESYNC },
|
|
[VCS_HW] = { .wait_mbox = MI_SEMAPHORE_SYNC_VEV, .mbox_reg = GEN6_VVESYNC },
|
|
[BCS_HW] = { .wait_mbox = MI_SEMAPHORE_SYNC_VEB, .mbox_reg = GEN6_BVESYNC },
|
|
},
|
|
};
|
|
u32 wait_mbox;
|
|
i915_reg_t mbox_reg;
|
|
|
|
if (i == engine->hw_id) {
|
|
wait_mbox = MI_SEMAPHORE_SYNC_INVALID;
|
|
mbox_reg = GEN6_NOSYNC;
|
|
} else {
|
|
wait_mbox = sem_data[engine->hw_id][i].wait_mbox;
|
|
mbox_reg = sem_data[engine->hw_id][i].mbox_reg;
|
|
}
|
|
|
|
engine->semaphore.mbox.wait[i] = wait_mbox;
|
|
engine->semaphore.mbox.signal[i] = mbox_reg;
|
|
}
|
|
}
|
|
|
|
static void intel_ring_init_irq(struct drm_i915_private *dev_priv,
|
|
struct intel_engine_cs *engine)
|
|
{
|
|
if (INTEL_GEN(dev_priv) >= 6) {
|
|
engine->irq_enable = gen6_irq_enable;
|
|
engine->irq_disable = gen6_irq_disable;
|
|
engine->irq_seqno_barrier = gen6_seqno_barrier;
|
|
} else if (INTEL_GEN(dev_priv) >= 5) {
|
|
engine->irq_enable = gen5_irq_enable;
|
|
engine->irq_disable = gen5_irq_disable;
|
|
engine->irq_seqno_barrier = gen5_seqno_barrier;
|
|
} else if (INTEL_GEN(dev_priv) >= 3) {
|
|
engine->irq_enable = i9xx_irq_enable;
|
|
engine->irq_disable = i9xx_irq_disable;
|
|
} else {
|
|
engine->irq_enable = i8xx_irq_enable;
|
|
engine->irq_disable = i8xx_irq_disable;
|
|
}
|
|
}
|
|
|
|
static void i9xx_set_default_submission(struct intel_engine_cs *engine)
|
|
{
|
|
engine->submit_request = i9xx_submit_request;
|
|
engine->cancel_requests = cancel_requests;
|
|
|
|
engine->park = NULL;
|
|
engine->unpark = NULL;
|
|
}
|
|
|
|
static void gen6_bsd_set_default_submission(struct intel_engine_cs *engine)
|
|
{
|
|
i9xx_set_default_submission(engine);
|
|
engine->submit_request = gen6_bsd_submit_request;
|
|
}
|
|
|
|
static void intel_ring_default_vfuncs(struct drm_i915_private *dev_priv,
|
|
struct intel_engine_cs *engine)
|
|
{
|
|
/* gen8+ are only supported with execlists */
|
|
GEM_BUG_ON(INTEL_GEN(dev_priv) >= 8);
|
|
|
|
intel_ring_init_irq(dev_priv, engine);
|
|
intel_ring_init_semaphores(dev_priv, engine);
|
|
|
|
engine->init_hw = init_ring_common;
|
|
engine->reset.prepare = reset_prepare;
|
|
engine->reset.reset = reset_ring;
|
|
engine->reset.finish = reset_finish;
|
|
|
|
engine->context_pin = intel_ring_context_pin;
|
|
engine->request_alloc = ring_request_alloc;
|
|
|
|
engine->emit_breadcrumb = i9xx_emit_breadcrumb;
|
|
engine->emit_breadcrumb_sz = i9xx_emit_breadcrumb_sz;
|
|
if (HAS_LEGACY_SEMAPHORES(dev_priv)) {
|
|
int num_rings;
|
|
|
|
engine->emit_breadcrumb = gen6_sema_emit_breadcrumb;
|
|
|
|
num_rings = INTEL_INFO(dev_priv)->num_rings - 1;
|
|
engine->emit_breadcrumb_sz += num_rings * 3;
|
|
if (num_rings & 1)
|
|
engine->emit_breadcrumb_sz++;
|
|
}
|
|
|
|
engine->set_default_submission = i9xx_set_default_submission;
|
|
|
|
if (INTEL_GEN(dev_priv) >= 6)
|
|
engine->emit_bb_start = gen6_emit_bb_start;
|
|
else if (INTEL_GEN(dev_priv) >= 4)
|
|
engine->emit_bb_start = i965_emit_bb_start;
|
|
else if (IS_I830(dev_priv) || IS_I845G(dev_priv))
|
|
engine->emit_bb_start = i830_emit_bb_start;
|
|
else
|
|
engine->emit_bb_start = i915_emit_bb_start;
|
|
}
|
|
|
|
int intel_init_render_ring_buffer(struct intel_engine_cs *engine)
|
|
{
|
|
struct drm_i915_private *dev_priv = engine->i915;
|
|
int ret;
|
|
|
|
intel_ring_default_vfuncs(dev_priv, engine);
|
|
|
|
if (HAS_L3_DPF(dev_priv))
|
|
engine->irq_keep_mask = GT_RENDER_L3_PARITY_ERROR_INTERRUPT;
|
|
|
|
engine->irq_enable_mask = GT_RENDER_USER_INTERRUPT;
|
|
|
|
if (INTEL_GEN(dev_priv) >= 6) {
|
|
engine->init_context = intel_rcs_ctx_init;
|
|
engine->emit_flush = gen7_render_ring_flush;
|
|
if (IS_GEN6(dev_priv))
|
|
engine->emit_flush = gen6_render_ring_flush;
|
|
} else if (IS_GEN5(dev_priv)) {
|
|
engine->emit_flush = gen4_render_ring_flush;
|
|
} else {
|
|
if (INTEL_GEN(dev_priv) < 4)
|
|
engine->emit_flush = gen2_render_ring_flush;
|
|
else
|
|
engine->emit_flush = gen4_render_ring_flush;
|
|
engine->irq_enable_mask = I915_USER_INTERRUPT;
|
|
}
|
|
|
|
if (IS_HASWELL(dev_priv))
|
|
engine->emit_bb_start = hsw_emit_bb_start;
|
|
|
|
engine->init_hw = init_render_ring;
|
|
|
|
ret = intel_init_ring_buffer(engine);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int intel_init_bsd_ring_buffer(struct intel_engine_cs *engine)
|
|
{
|
|
struct drm_i915_private *dev_priv = engine->i915;
|
|
|
|
intel_ring_default_vfuncs(dev_priv, engine);
|
|
|
|
if (INTEL_GEN(dev_priv) >= 6) {
|
|
/* gen6 bsd needs a special wa for tail updates */
|
|
if (IS_GEN6(dev_priv))
|
|
engine->set_default_submission = gen6_bsd_set_default_submission;
|
|
engine->emit_flush = gen6_bsd_ring_flush;
|
|
engine->irq_enable_mask = GT_BSD_USER_INTERRUPT;
|
|
} else {
|
|
engine->emit_flush = bsd_ring_flush;
|
|
if (IS_GEN5(dev_priv))
|
|
engine->irq_enable_mask = ILK_BSD_USER_INTERRUPT;
|
|
else
|
|
engine->irq_enable_mask = I915_BSD_USER_INTERRUPT;
|
|
}
|
|
|
|
return intel_init_ring_buffer(engine);
|
|
}
|
|
|
|
int intel_init_blt_ring_buffer(struct intel_engine_cs *engine)
|
|
{
|
|
struct drm_i915_private *dev_priv = engine->i915;
|
|
|
|
intel_ring_default_vfuncs(dev_priv, engine);
|
|
|
|
engine->emit_flush = gen6_ring_flush;
|
|
engine->irq_enable_mask = GT_BLT_USER_INTERRUPT;
|
|
|
|
return intel_init_ring_buffer(engine);
|
|
}
|
|
|
|
int intel_init_vebox_ring_buffer(struct intel_engine_cs *engine)
|
|
{
|
|
struct drm_i915_private *dev_priv = engine->i915;
|
|
|
|
intel_ring_default_vfuncs(dev_priv, engine);
|
|
|
|
engine->emit_flush = gen6_ring_flush;
|
|
engine->irq_enable_mask = PM_VEBOX_USER_INTERRUPT;
|
|
engine->irq_enable = hsw_vebox_irq_enable;
|
|
engine->irq_disable = hsw_vebox_irq_disable;
|
|
|
|
return intel_init_ring_buffer(engine);
|
|
}
|