forked from KolibriOS/kolibrios
1370 lines
33 KiB
C
1370 lines
33 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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#define iowrite32(v, addr) writel((v), (addr))
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#define ioread32(addr) readl(addr)
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#include "drmP.h"
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#include "drm.h"
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#include "i915_drv.h"
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#include "i915_drm.h"
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//#include "i915_trace.h"
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#include "intel_drv.h"
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static inline int ring_space(struct intel_ring_buffer *ring)
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{
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int space = (ring->head & HEAD_ADDR) - (ring->tail + 8);
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if (space < 0)
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space += ring->size;
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return space;
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}
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static u32 i915_gem_get_seqno(struct drm_device *dev)
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{
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drm_i915_private_t *dev_priv = dev->dev_private;
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u32 seqno;
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seqno = dev_priv->next_seqno;
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/* reserve 0 for non-seqno */
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if (++dev_priv->next_seqno == 0)
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dev_priv->next_seqno = 1;
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return seqno;
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}
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static int
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render_ring_flush(struct intel_ring_buffer *ring,
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u32 invalidate_domains,
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u32 flush_domains)
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{
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struct drm_device *dev = ring->dev;
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u32 cmd;
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int ret;
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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 | MI_NO_WRITE_FLUSH;
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if ((invalidate_domains|flush_domains) &
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I915_GEM_DOMAIN_RENDER)
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cmd &= ~MI_NO_WRITE_FLUSH;
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if (INTEL_INFO(dev)->gen < 4) {
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/*
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* On the 965, the sampler cache always gets flushed
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* and this bit is reserved.
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*/
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if (invalidate_domains & I915_GEM_DOMAIN_SAMPLER)
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cmd |= MI_READ_FLUSH;
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}
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if (invalidate_domains & I915_GEM_DOMAIN_INSTRUCTION)
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cmd |= MI_EXE_FLUSH;
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if (invalidate_domains & I915_GEM_DOMAIN_COMMAND &&
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(IS_G4X(dev) || IS_GEN5(dev)))
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cmd |= MI_INVALIDATE_ISP;
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ret = intel_ring_begin(ring, 2);
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if (ret)
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return ret;
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intel_ring_emit(ring, cmd);
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intel_ring_emit(ring, MI_NOOP);
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intel_ring_advance(ring);
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return 0;
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}
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static void ring_write_tail(struct intel_ring_buffer *ring,
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u32 value)
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{
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drm_i915_private_t *dev_priv = ring->dev->dev_private;
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I915_WRITE_TAIL(ring, value);
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}
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u32 intel_ring_get_active_head(struct intel_ring_buffer *ring)
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{
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drm_i915_private_t *dev_priv = ring->dev->dev_private;
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u32 acthd_reg = INTEL_INFO(ring->dev)->gen >= 4 ?
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RING_ACTHD(ring->mmio_base) : ACTHD;
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return I915_READ(acthd_reg);
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}
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static int init_ring_common(struct intel_ring_buffer *ring)
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{
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drm_i915_private_t *dev_priv = ring->dev->dev_private;
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struct drm_i915_gem_object *obj = ring->obj;
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u32 head;
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ENTER();
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/* Stop the ring if it's running. */
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I915_WRITE_CTL(ring, 0);
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I915_WRITE_HEAD(ring, 0);
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ring->write_tail(ring, 0);
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/* Initialize the ring. */
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I915_WRITE_START(ring, obj->gtt_offset);
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head = I915_READ_HEAD(ring) & HEAD_ADDR;
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/* G45 ring initialization fails to reset head to zero */
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if (head != 0) {
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DRM_DEBUG_KMS("%s head not reset to zero "
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"ctl %08x head %08x tail %08x start %08x\n",
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ring->name,
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I915_READ_CTL(ring),
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I915_READ_HEAD(ring),
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I915_READ_TAIL(ring),
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I915_READ_START(ring));
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I915_WRITE_HEAD(ring, 0);
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if (I915_READ_HEAD(ring) & HEAD_ADDR) {
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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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ring->name,
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I915_READ_CTL(ring),
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I915_READ_HEAD(ring),
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I915_READ_TAIL(ring),
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I915_READ_START(ring));
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}
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}
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I915_WRITE_CTL(ring,
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((ring->size - PAGE_SIZE) & RING_NR_PAGES)
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| RING_REPORT_64K | RING_VALID);
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/* If the head is still not zero, the ring is dead */
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if ((I915_READ_CTL(ring) & RING_VALID) == 0 ||
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I915_READ_START(ring) != obj->gtt_offset ||
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(I915_READ_HEAD(ring) & HEAD_ADDR) != 0) {
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DRM_ERROR("%s initialization failed "
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"ctl %08x head %08x tail %08x start %08x\n",
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ring->name,
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I915_READ_CTL(ring),
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I915_READ_HEAD(ring),
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I915_READ_TAIL(ring),
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I915_READ_START(ring));
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return -EIO;
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}
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ring->head = I915_READ_HEAD(ring);
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ring->tail = I915_READ_TAIL(ring) & TAIL_ADDR;
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ring->space = ring_space(ring);
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LEAVE();
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return 0;
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}
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#if 0
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/*
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* 965+ support PIPE_CONTROL commands, which provide finer grained control
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* over cache flushing.
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*/
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struct pipe_control {
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struct drm_i915_gem_object *obj;
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volatile u32 *cpu_page;
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u32 gtt_offset;
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};
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static int
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init_pipe_control(struct intel_ring_buffer *ring)
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{
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struct pipe_control *pc;
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struct drm_i915_gem_object *obj;
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int ret;
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if (ring->private)
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return 0;
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pc = kmalloc(sizeof(*pc), GFP_KERNEL);
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if (!pc)
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return -ENOMEM;
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obj = i915_gem_alloc_object(ring->dev, 4096);
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if (obj == NULL) {
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DRM_ERROR("Failed to allocate seqno page\n");
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ret = -ENOMEM;
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goto err;
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}
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i915_gem_object_set_cache_level(obj, I915_CACHE_LLC);
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ret = i915_gem_object_pin(obj, 4096, true);
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if (ret)
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goto err_unref;
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pc->gtt_offset = obj->gtt_offset;
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pc->cpu_page = kmap(obj->pages[0]);
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if (pc->cpu_page == NULL)
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goto err_unpin;
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pc->obj = obj;
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ring->private = pc;
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return 0;
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err_unpin:
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i915_gem_object_unpin(obj);
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err_unref:
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drm_gem_object_unreference(&obj->base);
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err:
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kfree(pc);
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return ret;
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}
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static void
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cleanup_pipe_control(struct intel_ring_buffer *ring)
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{
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struct pipe_control *pc = ring->private;
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struct drm_i915_gem_object *obj;
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if (!ring->private)
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return;
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obj = pc->obj;
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kunmap(obj->pages[0]);
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i915_gem_object_unpin(obj);
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drm_gem_object_unreference(&obj->base);
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kfree(pc);
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ring->private = NULL;
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}
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#endif
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static int init_render_ring(struct intel_ring_buffer *ring)
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{
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struct drm_device *dev = ring->dev;
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struct drm_i915_private *dev_priv = dev->dev_private;
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ENTER();
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int ret = init_ring_common(ring);
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if (INTEL_INFO(dev)->gen > 3) {
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int mode = VS_TIMER_DISPATCH << 16 | VS_TIMER_DISPATCH;
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if (IS_GEN6(dev) || IS_GEN7(dev))
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mode |= MI_FLUSH_ENABLE << 16 | MI_FLUSH_ENABLE;
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I915_WRITE(MI_MODE, mode);
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if (IS_GEN7(dev))
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I915_WRITE(GFX_MODE_GEN7,
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GFX_MODE_DISABLE(GFX_TLB_INVALIDATE_ALWAYS) |
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GFX_MODE_ENABLE(GFX_REPLAY_MODE));
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}
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if (INTEL_INFO(dev)->gen >= 6) {
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} else if (IS_GEN5(dev)) {
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// ret = init_pipe_control(ring);
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if (ret)
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return ret;
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}
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LEAVE();
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return ret;
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}
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#if 0
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static void render_ring_cleanup(struct intel_ring_buffer *ring)
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{
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if (!ring->private)
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return;
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cleanup_pipe_control(ring);
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}
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static void
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update_semaphore(struct intel_ring_buffer *ring, int i, u32 seqno)
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{
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struct drm_device *dev = ring->dev;
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struct drm_i915_private *dev_priv = dev->dev_private;
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int id;
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/*
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* cs -> 1 = vcs, 0 = bcs
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* vcs -> 1 = bcs, 0 = cs,
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* bcs -> 1 = cs, 0 = vcs.
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*/
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id = ring - dev_priv->ring;
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id += 2 - i;
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id %= 3;
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intel_ring_emit(ring,
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MI_SEMAPHORE_MBOX |
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MI_SEMAPHORE_REGISTER |
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MI_SEMAPHORE_UPDATE);
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intel_ring_emit(ring, seqno);
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intel_ring_emit(ring,
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RING_SYNC_0(dev_priv->ring[id].mmio_base) + 4*i);
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}
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static int
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gen6_add_request(struct intel_ring_buffer *ring,
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u32 *result)
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{
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u32 seqno;
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int ret;
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ret = intel_ring_begin(ring, 10);
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if (ret)
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return ret;
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seqno = i915_gem_get_seqno(ring->dev);
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update_semaphore(ring, 0, seqno);
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update_semaphore(ring, 1, seqno);
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intel_ring_emit(ring, MI_STORE_DWORD_INDEX);
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intel_ring_emit(ring, I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
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intel_ring_emit(ring, seqno);
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intel_ring_emit(ring, MI_USER_INTERRUPT);
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intel_ring_advance(ring);
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*result = seqno;
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return 0;
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}
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int
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intel_ring_sync(struct intel_ring_buffer *ring,
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struct intel_ring_buffer *to,
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u32 seqno)
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{
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int ret;
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ret = intel_ring_begin(ring, 4);
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if (ret)
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return ret;
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intel_ring_emit(ring,
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MI_SEMAPHORE_MBOX |
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MI_SEMAPHORE_REGISTER |
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intel_ring_sync_index(ring, to) << 17 |
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MI_SEMAPHORE_COMPARE);
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intel_ring_emit(ring, seqno);
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intel_ring_emit(ring, 0);
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intel_ring_emit(ring, MI_NOOP);
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intel_ring_advance(ring);
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return 0;
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}
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#define PIPE_CONTROL_FLUSH(ring__, addr__) \
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do { \
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intel_ring_emit(ring__, GFX_OP_PIPE_CONTROL | PIPE_CONTROL_QW_WRITE | \
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PIPE_CONTROL_DEPTH_STALL | 2); \
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intel_ring_emit(ring__, (addr__) | PIPE_CONTROL_GLOBAL_GTT); \
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intel_ring_emit(ring__, 0); \
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intel_ring_emit(ring__, 0); \
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} while (0)
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static int
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pc_render_add_request(struct intel_ring_buffer *ring,
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u32 *result)
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{
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struct drm_device *dev = ring->dev;
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u32 seqno = i915_gem_get_seqno(dev);
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struct pipe_control *pc = ring->private;
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u32 scratch_addr = pc->gtt_offset + 128;
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int ret;
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/* For Ironlake, MI_USER_INTERRUPT was deprecated and apparently
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* incoherent with writes to memory, i.e. completely fubar,
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* so we need to use PIPE_NOTIFY instead.
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*
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* However, we also need to workaround the qword write
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* incoherence by flushing the 6 PIPE_NOTIFY buffers out to
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* memory before requesting an interrupt.
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*/
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ret = intel_ring_begin(ring, 32);
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if (ret)
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return ret;
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intel_ring_emit(ring, GFX_OP_PIPE_CONTROL | PIPE_CONTROL_QW_WRITE |
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PIPE_CONTROL_WC_FLUSH | PIPE_CONTROL_TC_FLUSH);
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intel_ring_emit(ring, pc->gtt_offset | PIPE_CONTROL_GLOBAL_GTT);
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intel_ring_emit(ring, seqno);
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intel_ring_emit(ring, 0);
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PIPE_CONTROL_FLUSH(ring, scratch_addr);
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scratch_addr += 128; /* write to separate cachelines */
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PIPE_CONTROL_FLUSH(ring, scratch_addr);
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scratch_addr += 128;
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PIPE_CONTROL_FLUSH(ring, scratch_addr);
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scratch_addr += 128;
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PIPE_CONTROL_FLUSH(ring, scratch_addr);
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scratch_addr += 128;
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PIPE_CONTROL_FLUSH(ring, scratch_addr);
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scratch_addr += 128;
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PIPE_CONTROL_FLUSH(ring, scratch_addr);
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intel_ring_emit(ring, GFX_OP_PIPE_CONTROL | PIPE_CONTROL_QW_WRITE |
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PIPE_CONTROL_WC_FLUSH | PIPE_CONTROL_TC_FLUSH |
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PIPE_CONTROL_NOTIFY);
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intel_ring_emit(ring, pc->gtt_offset | PIPE_CONTROL_GLOBAL_GTT);
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intel_ring_emit(ring, seqno);
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intel_ring_emit(ring, 0);
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intel_ring_advance(ring);
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*result = seqno;
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return 0;
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}
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|
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static int
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render_ring_add_request(struct intel_ring_buffer *ring,
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u32 *result)
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{
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struct drm_device *dev = ring->dev;
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u32 seqno = i915_gem_get_seqno(dev);
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int ret;
|
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|
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ret = intel_ring_begin(ring, 4);
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if (ret)
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return ret;
|
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|
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intel_ring_emit(ring, MI_STORE_DWORD_INDEX);
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intel_ring_emit(ring, I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
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intel_ring_emit(ring, seqno);
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intel_ring_emit(ring, MI_USER_INTERRUPT);
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intel_ring_advance(ring);
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*result = seqno;
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return 0;
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}
|
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|
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static u32
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ring_get_seqno(struct intel_ring_buffer *ring)
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{
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return intel_read_status_page(ring, I915_GEM_HWS_INDEX);
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}
|
|
|
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static u32
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pc_render_get_seqno(struct intel_ring_buffer *ring)
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{
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struct pipe_control *pc = ring->private;
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return pc->cpu_page[0];
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}
|
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|
|
static void
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ironlake_enable_irq(drm_i915_private_t *dev_priv, u32 mask)
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{
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dev_priv->gt_irq_mask &= ~mask;
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I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
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POSTING_READ(GTIMR);
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}
|
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|
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static void
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ironlake_disable_irq(drm_i915_private_t *dev_priv, u32 mask)
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{
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dev_priv->gt_irq_mask |= mask;
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I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
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POSTING_READ(GTIMR);
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}
|
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|
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static void
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i915_enable_irq(drm_i915_private_t *dev_priv, u32 mask)
|
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{
|
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dev_priv->irq_mask &= ~mask;
|
|
I915_WRITE(IMR, dev_priv->irq_mask);
|
|
POSTING_READ(IMR);
|
|
}
|
|
|
|
static void
|
|
i915_disable_irq(drm_i915_private_t *dev_priv, u32 mask)
|
|
{
|
|
dev_priv->irq_mask |= mask;
|
|
I915_WRITE(IMR, dev_priv->irq_mask);
|
|
POSTING_READ(IMR);
|
|
}
|
|
|
|
static bool
|
|
render_ring_get_irq(struct intel_ring_buffer *ring)
|
|
{
|
|
struct drm_device *dev = ring->dev;
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
|
|
if (!dev->irq_enabled)
|
|
return false;
|
|
|
|
spin_lock(&ring->irq_lock);
|
|
if (ring->irq_refcount++ == 0) {
|
|
if (HAS_PCH_SPLIT(dev))
|
|
ironlake_enable_irq(dev_priv,
|
|
GT_PIPE_NOTIFY | GT_USER_INTERRUPT);
|
|
else
|
|
i915_enable_irq(dev_priv, I915_USER_INTERRUPT);
|
|
}
|
|
spin_unlock(&ring->irq_lock);
|
|
|
|
return true;
|
|
}
|
|
|
|
static void
|
|
render_ring_put_irq(struct intel_ring_buffer *ring)
|
|
{
|
|
struct drm_device *dev = ring->dev;
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
|
|
spin_lock(&ring->irq_lock);
|
|
if (--ring->irq_refcount == 0) {
|
|
if (HAS_PCH_SPLIT(dev))
|
|
ironlake_disable_irq(dev_priv,
|
|
GT_USER_INTERRUPT |
|
|
GT_PIPE_NOTIFY);
|
|
else
|
|
i915_disable_irq(dev_priv, I915_USER_INTERRUPT);
|
|
}
|
|
spin_unlock(&ring->irq_lock);
|
|
}
|
|
|
|
void intel_ring_setup_status_page(struct intel_ring_buffer *ring)
|
|
{
|
|
struct drm_device *dev = ring->dev;
|
|
drm_i915_private_t *dev_priv = ring->dev->dev_private;
|
|
u32 mmio = 0;
|
|
|
|
/* The ring status page addresses are no longer next to the rest of
|
|
* the ring registers as of gen7.
|
|
*/
|
|
if (IS_GEN7(dev)) {
|
|
switch (ring->id) {
|
|
case RING_RENDER:
|
|
mmio = RENDER_HWS_PGA_GEN7;
|
|
break;
|
|
case RING_BLT:
|
|
mmio = BLT_HWS_PGA_GEN7;
|
|
break;
|
|
case RING_BSD:
|
|
mmio = BSD_HWS_PGA_GEN7;
|
|
break;
|
|
}
|
|
} else if (IS_GEN6(ring->dev)) {
|
|
mmio = RING_HWS_PGA_GEN6(ring->mmio_base);
|
|
} else {
|
|
mmio = RING_HWS_PGA(ring->mmio_base);
|
|
}
|
|
|
|
I915_WRITE(mmio, (u32)ring->status_page.gfx_addr);
|
|
POSTING_READ(mmio);
|
|
}
|
|
#endif
|
|
|
|
static int
|
|
bsd_ring_flush(struct intel_ring_buffer *ring,
|
|
u32 invalidate_domains,
|
|
u32 flush_domains)
|
|
{
|
|
int ret;
|
|
|
|
ret = intel_ring_begin(ring, 2);
|
|
if (ret)
|
|
return ret;
|
|
|
|
intel_ring_emit(ring, MI_FLUSH);
|
|
intel_ring_emit(ring, MI_NOOP);
|
|
intel_ring_advance(ring);
|
|
return 0;
|
|
}
|
|
|
|
#if 0
|
|
|
|
static int
|
|
ring_add_request(struct intel_ring_buffer *ring,
|
|
u32 *result)
|
|
{
|
|
u32 seqno;
|
|
int ret;
|
|
|
|
ret = intel_ring_begin(ring, 4);
|
|
if (ret)
|
|
return ret;
|
|
|
|
seqno = i915_gem_get_seqno(ring->dev);
|
|
|
|
intel_ring_emit(ring, MI_STORE_DWORD_INDEX);
|
|
intel_ring_emit(ring, I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
|
|
intel_ring_emit(ring, seqno);
|
|
intel_ring_emit(ring, MI_USER_INTERRUPT);
|
|
intel_ring_advance(ring);
|
|
|
|
*result = seqno;
|
|
return 0;
|
|
}
|
|
|
|
static bool
|
|
gen6_ring_get_irq(struct intel_ring_buffer *ring, u32 gflag, u32 rflag)
|
|
{
|
|
struct drm_device *dev = ring->dev;
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
|
|
if (!dev->irq_enabled)
|
|
return false;
|
|
|
|
spin_lock(&ring->irq_lock);
|
|
if (ring->irq_refcount++ == 0) {
|
|
ring->irq_mask &= ~rflag;
|
|
I915_WRITE_IMR(ring, ring->irq_mask);
|
|
ironlake_enable_irq(dev_priv, gflag);
|
|
}
|
|
spin_unlock(&ring->irq_lock);
|
|
|
|
return true;
|
|
}
|
|
|
|
static void
|
|
gen6_ring_put_irq(struct intel_ring_buffer *ring, u32 gflag, u32 rflag)
|
|
{
|
|
struct drm_device *dev = ring->dev;
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
|
|
spin_lock(&ring->irq_lock);
|
|
if (--ring->irq_refcount == 0) {
|
|
ring->irq_mask |= rflag;
|
|
I915_WRITE_IMR(ring, ring->irq_mask);
|
|
ironlake_disable_irq(dev_priv, gflag);
|
|
}
|
|
spin_unlock(&ring->irq_lock);
|
|
}
|
|
|
|
static bool
|
|
bsd_ring_get_irq(struct intel_ring_buffer *ring)
|
|
{
|
|
struct drm_device *dev = ring->dev;
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
|
|
if (!dev->irq_enabled)
|
|
return false;
|
|
|
|
spin_lock(&ring->irq_lock);
|
|
if (ring->irq_refcount++ == 0) {
|
|
if (IS_G4X(dev))
|
|
i915_enable_irq(dev_priv, I915_BSD_USER_INTERRUPT);
|
|
else
|
|
ironlake_enable_irq(dev_priv, GT_BSD_USER_INTERRUPT);
|
|
}
|
|
spin_unlock(&ring->irq_lock);
|
|
|
|
return true;
|
|
}
|
|
static void
|
|
bsd_ring_put_irq(struct intel_ring_buffer *ring)
|
|
{
|
|
struct drm_device *dev = ring->dev;
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
|
|
spin_lock(&ring->irq_lock);
|
|
if (--ring->irq_refcount == 0) {
|
|
if (IS_G4X(dev))
|
|
i915_disable_irq(dev_priv, I915_BSD_USER_INTERRUPT);
|
|
else
|
|
ironlake_disable_irq(dev_priv, GT_BSD_USER_INTERRUPT);
|
|
}
|
|
spin_unlock(&ring->irq_lock);
|
|
}
|
|
|
|
static int
|
|
ring_dispatch_execbuffer(struct intel_ring_buffer *ring, u32 offset, u32 length)
|
|
{
|
|
int ret;
|
|
|
|
ret = intel_ring_begin(ring, 2);
|
|
if (ret)
|
|
return ret;
|
|
|
|
intel_ring_emit(ring,
|
|
MI_BATCH_BUFFER_START | (2 << 6) |
|
|
MI_BATCH_NON_SECURE_I965);
|
|
intel_ring_emit(ring, offset);
|
|
intel_ring_advance(ring);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
render_ring_dispatch_execbuffer(struct intel_ring_buffer *ring,
|
|
u32 offset, u32 len)
|
|
{
|
|
struct drm_device *dev = ring->dev;
|
|
int ret;
|
|
|
|
if (IS_I830(dev) || IS_845G(dev)) {
|
|
ret = intel_ring_begin(ring, 4);
|
|
if (ret)
|
|
return ret;
|
|
|
|
intel_ring_emit(ring, MI_BATCH_BUFFER);
|
|
intel_ring_emit(ring, offset | MI_BATCH_NON_SECURE);
|
|
intel_ring_emit(ring, offset + len - 8);
|
|
intel_ring_emit(ring, 0);
|
|
} else {
|
|
ret = intel_ring_begin(ring, 2);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (INTEL_INFO(dev)->gen >= 4) {
|
|
intel_ring_emit(ring,
|
|
MI_BATCH_BUFFER_START | (2 << 6) |
|
|
MI_BATCH_NON_SECURE_I965);
|
|
intel_ring_emit(ring, offset);
|
|
} else {
|
|
intel_ring_emit(ring,
|
|
MI_BATCH_BUFFER_START | (2 << 6));
|
|
intel_ring_emit(ring, offset | MI_BATCH_NON_SECURE);
|
|
}
|
|
}
|
|
intel_ring_advance(ring);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void cleanup_status_page(struct intel_ring_buffer *ring)
|
|
{
|
|
drm_i915_private_t *dev_priv = ring->dev->dev_private;
|
|
struct drm_i915_gem_object *obj;
|
|
|
|
obj = ring->status_page.obj;
|
|
if (obj == NULL)
|
|
return;
|
|
|
|
kunmap(obj->pages[0]);
|
|
i915_gem_object_unpin(obj);
|
|
drm_gem_object_unreference(&obj->base);
|
|
ring->status_page.obj = NULL;
|
|
|
|
memset(&dev_priv->hws_map, 0, sizeof(dev_priv->hws_map));
|
|
}
|
|
|
|
static int init_status_page(struct intel_ring_buffer *ring)
|
|
{
|
|
struct drm_device *dev = ring->dev;
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
struct drm_i915_gem_object *obj;
|
|
int ret;
|
|
|
|
obj = i915_gem_alloc_object(dev, 4096);
|
|
if (obj == NULL) {
|
|
DRM_ERROR("Failed to allocate status page\n");
|
|
ret = -ENOMEM;
|
|
goto err;
|
|
}
|
|
|
|
i915_gem_object_set_cache_level(obj, I915_CACHE_LLC);
|
|
|
|
ret = i915_gem_object_pin(obj, 4096, true);
|
|
if (ret != 0) {
|
|
goto err_unref;
|
|
}
|
|
|
|
ring->status_page.gfx_addr = obj->gtt_offset;
|
|
ring->status_page.page_addr = kmap(obj->pages[0]);
|
|
if (ring->status_page.page_addr == NULL) {
|
|
memset(&dev_priv->hws_map, 0, sizeof(dev_priv->hws_map));
|
|
goto err_unpin;
|
|
}
|
|
ring->status_page.obj = obj;
|
|
memset(ring->status_page.page_addr, 0, PAGE_SIZE);
|
|
|
|
intel_ring_setup_status_page(ring);
|
|
DRM_DEBUG_DRIVER("%s hws offset: 0x%08x\n",
|
|
ring->name, ring->status_page.gfx_addr);
|
|
|
|
return 0;
|
|
|
|
err_unpin:
|
|
i915_gem_object_unpin(obj);
|
|
err_unref:
|
|
drm_gem_object_unreference(&obj->base);
|
|
err:
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
int intel_init_ring_buffer(struct drm_device *dev,
|
|
struct intel_ring_buffer *ring)
|
|
{
|
|
struct drm_i915_gem_object *obj=NULL;
|
|
int ret;
|
|
ENTER();
|
|
ring->dev = dev;
|
|
INIT_LIST_HEAD(&ring->active_list);
|
|
INIT_LIST_HEAD(&ring->request_list);
|
|
INIT_LIST_HEAD(&ring->gpu_write_list);
|
|
|
|
// init_waitqueue_head(&ring->irq_queue);
|
|
// spin_lock_init(&ring->irq_lock);
|
|
ring->irq_mask = ~0;
|
|
|
|
if (I915_NEED_GFX_HWS(dev)) {
|
|
// ret = init_status_page(ring);
|
|
// if (ret)
|
|
// return ret;
|
|
}
|
|
|
|
obj = i915_gem_alloc_object(dev, ring->size);
|
|
if (obj == NULL) {
|
|
DRM_ERROR("Failed to allocate ringbuffer\n");
|
|
ret = -ENOMEM;
|
|
goto err_hws;
|
|
}
|
|
|
|
ring->obj = obj;
|
|
|
|
ret = i915_gem_object_pin(obj, PAGE_SIZE, true);
|
|
if (ret)
|
|
goto err_unref;
|
|
|
|
ring->map.size = ring->size;
|
|
ring->map.offset = get_bus_addr() + obj->gtt_offset;
|
|
ring->map.type = 0;
|
|
ring->map.flags = 0;
|
|
ring->map.mtrr = 0;
|
|
|
|
// drm_core_ioremap_wc(&ring->map, dev);
|
|
|
|
ring->map.handle = ioremap(ring->map.offset, ring->map.size);
|
|
|
|
if (ring->map.handle == NULL) {
|
|
DRM_ERROR("Failed to map ringbuffer.\n");
|
|
ret = -EINVAL;
|
|
goto err_unpin;
|
|
}
|
|
|
|
ring->virtual_start = ring->map.handle;
|
|
ret = ring->init(ring);
|
|
if (ret)
|
|
goto err_unmap;
|
|
|
|
/* 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 = ring->size;
|
|
if (IS_I830(ring->dev))
|
|
ring->effective_size -= 128;
|
|
LEAVE();
|
|
return 0;
|
|
|
|
err_unmap:
|
|
// drm_core_ioremapfree(&ring->map, dev);
|
|
FreeKernelSpace(ring->virtual_start);
|
|
err_unpin:
|
|
// i915_gem_object_unpin(obj);
|
|
err_unref:
|
|
// drm_gem_object_unreference(&obj->base);
|
|
ring->obj = NULL;
|
|
err_hws:
|
|
// cleanup_status_page(ring);
|
|
return ret;
|
|
}
|
|
|
|
|
|
void intel_cleanup_ring_buffer(struct intel_ring_buffer *ring)
|
|
{
|
|
struct drm_i915_private *dev_priv;
|
|
int ret;
|
|
|
|
if (ring->obj == NULL)
|
|
return;
|
|
|
|
/* Disable the ring buffer. The ring must be idle at this point */
|
|
dev_priv = ring->dev->dev_private;
|
|
ret = intel_wait_ring_idle(ring);
|
|
if (ret)
|
|
DRM_ERROR("failed to quiesce %s whilst cleaning up: %d\n",
|
|
ring->name, ret);
|
|
|
|
I915_WRITE_CTL(ring, 0);
|
|
|
|
// drm_core_ioremapfree(&ring->map, ring->dev);
|
|
|
|
// i915_gem_object_unpin(ring->obj);
|
|
// drm_gem_object_unreference(&ring->obj->base);
|
|
ring->obj = NULL;
|
|
|
|
if (ring->cleanup)
|
|
ring->cleanup(ring);
|
|
|
|
// cleanup_status_page(ring);
|
|
}
|
|
|
|
|
|
static int intel_wrap_ring_buffer(struct intel_ring_buffer *ring)
|
|
{
|
|
unsigned int *virt;
|
|
int rem = ring->size - ring->tail;
|
|
|
|
if (ring->space < rem) {
|
|
int ret = intel_wait_ring_buffer(ring, rem);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
virt = (unsigned int *)(ring->virtual_start + ring->tail);
|
|
rem /= 8;
|
|
while (rem--) {
|
|
*virt++ = MI_NOOP;
|
|
*virt++ = MI_NOOP;
|
|
}
|
|
|
|
ring->tail = 0;
|
|
ring->space = ring_space(ring);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int intel_wait_ring_buffer(struct intel_ring_buffer *ring, int n)
|
|
{
|
|
struct drm_device *dev = ring->dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
unsigned long end;
|
|
u32 head;
|
|
|
|
/* If the reported head position has wrapped or hasn't advanced,
|
|
* fallback to the slow and accurate path.
|
|
*/
|
|
head = intel_read_status_page(ring, 4);
|
|
if (head > ring->head) {
|
|
ring->head = head;
|
|
ring->space = ring_space(ring);
|
|
if (ring->space >= n)
|
|
return 0;
|
|
}
|
|
|
|
// trace_i915_ring_wait_begin(ring);
|
|
end = jiffies + 3 * HZ;
|
|
do {
|
|
ring->head = I915_READ_HEAD(ring);
|
|
ring->space = ring_space(ring);
|
|
if (ring->space >= n) {
|
|
// trace_i915_ring_wait_end(ring);
|
|
return 0;
|
|
}
|
|
|
|
if (dev->primary->master) {
|
|
struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
|
|
if (master_priv->sarea_priv)
|
|
master_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT;
|
|
}
|
|
|
|
msleep(1);
|
|
if (atomic_read(&dev_priv->mm.wedged))
|
|
return -EAGAIN;
|
|
} while (!time_after(jiffies, end));
|
|
// trace_i915_ring_wait_end(ring);
|
|
return -EBUSY;
|
|
}
|
|
|
|
int intel_ring_begin(struct intel_ring_buffer *ring,
|
|
int num_dwords)
|
|
{
|
|
struct drm_i915_private *dev_priv = ring->dev->dev_private;
|
|
int n = 4*num_dwords;
|
|
int ret;
|
|
|
|
if (unlikely(atomic_read(&dev_priv->mm.wedged)))
|
|
return -EIO;
|
|
|
|
if (unlikely(ring->tail + n > ring->effective_size)) {
|
|
ret = intel_wrap_ring_buffer(ring);
|
|
if (unlikely(ret))
|
|
return ret;
|
|
}
|
|
|
|
if (unlikely(ring->space < n)) {
|
|
ret = intel_wait_ring_buffer(ring, n);
|
|
if (unlikely(ret))
|
|
return ret;
|
|
}
|
|
|
|
ring->space -= n;
|
|
return 0;
|
|
}
|
|
|
|
void intel_ring_advance(struct intel_ring_buffer *ring)
|
|
{
|
|
ring->tail &= ring->size - 1;
|
|
ring->write_tail(ring, ring->tail);
|
|
}
|
|
|
|
|
|
static const struct intel_ring_buffer render_ring = {
|
|
.name = "render ring",
|
|
.id = RING_RENDER,
|
|
.mmio_base = RENDER_RING_BASE,
|
|
.size = 32 * PAGE_SIZE,
|
|
.init = init_render_ring,
|
|
.write_tail = ring_write_tail,
|
|
.flush = render_ring_flush,
|
|
// .add_request = render_ring_add_request,
|
|
// .get_seqno = ring_get_seqno,
|
|
// .irq_get = render_ring_get_irq,
|
|
// .irq_put = render_ring_put_irq,
|
|
// .dispatch_execbuffer = render_ring_dispatch_execbuffer,
|
|
// .cleanup = render_ring_cleanup,
|
|
};
|
|
|
|
/* ring buffer for bit-stream decoder */
|
|
|
|
static const struct intel_ring_buffer bsd_ring = {
|
|
.name = "bsd ring",
|
|
.id = RING_BSD,
|
|
.mmio_base = BSD_RING_BASE,
|
|
.size = 32 * PAGE_SIZE,
|
|
.init = init_ring_common,
|
|
.write_tail = ring_write_tail,
|
|
.flush = bsd_ring_flush,
|
|
// .add_request = ring_add_request,
|
|
// .get_seqno = ring_get_seqno,
|
|
// .irq_get = bsd_ring_get_irq,
|
|
// .irq_put = bsd_ring_put_irq,
|
|
// .dispatch_execbuffer = ring_dispatch_execbuffer,
|
|
};
|
|
|
|
|
|
static void gen6_bsd_ring_write_tail(struct intel_ring_buffer *ring,
|
|
u32 value)
|
|
{
|
|
drm_i915_private_t *dev_priv = ring->dev->dev_private;
|
|
|
|
/* Every tail move must follow the sequence below */
|
|
I915_WRITE(GEN6_BSD_SLEEP_PSMI_CONTROL,
|
|
GEN6_BSD_SLEEP_PSMI_CONTROL_RC_ILDL_MESSAGE_MODIFY_MASK |
|
|
GEN6_BSD_SLEEP_PSMI_CONTROL_RC_ILDL_MESSAGE_DISABLE);
|
|
I915_WRITE(GEN6_BSD_RNCID, 0x0);
|
|
|
|
if (wait_for((I915_READ(GEN6_BSD_SLEEP_PSMI_CONTROL) &
|
|
GEN6_BSD_SLEEP_PSMI_CONTROL_IDLE_INDICATOR) == 0,
|
|
50))
|
|
DRM_ERROR("timed out waiting for IDLE Indicator\n");
|
|
|
|
I915_WRITE_TAIL(ring, value);
|
|
I915_WRITE(GEN6_BSD_SLEEP_PSMI_CONTROL,
|
|
GEN6_BSD_SLEEP_PSMI_CONTROL_RC_ILDL_MESSAGE_MODIFY_MASK |
|
|
GEN6_BSD_SLEEP_PSMI_CONTROL_RC_ILDL_MESSAGE_ENABLE);
|
|
}
|
|
|
|
|
|
static int gen6_ring_flush(struct intel_ring_buffer *ring,
|
|
u32 invalidate, u32 flush)
|
|
{
|
|
uint32_t cmd;
|
|
int ret;
|
|
|
|
ret = intel_ring_begin(ring, 4);
|
|
if (ret)
|
|
return ret;
|
|
|
|
cmd = MI_FLUSH_DW;
|
|
if (invalidate & I915_GEM_GPU_DOMAINS)
|
|
cmd |= MI_INVALIDATE_TLB | MI_INVALIDATE_BSD;
|
|
intel_ring_emit(ring, cmd);
|
|
intel_ring_emit(ring, 0);
|
|
intel_ring_emit(ring, 0);
|
|
intel_ring_emit(ring, MI_NOOP);
|
|
intel_ring_advance(ring);
|
|
return 0;
|
|
}
|
|
|
|
#if 0
|
|
static int
|
|
gen6_ring_dispatch_execbuffer(struct intel_ring_buffer *ring,
|
|
u32 offset, u32 len)
|
|
{
|
|
int ret;
|
|
|
|
ret = intel_ring_begin(ring, 2);
|
|
if (ret)
|
|
return ret;
|
|
|
|
intel_ring_emit(ring, MI_BATCH_BUFFER_START | MI_BATCH_NON_SECURE_I965);
|
|
/* bit0-7 is the length on GEN6+ */
|
|
intel_ring_emit(ring, offset);
|
|
intel_ring_advance(ring);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static bool
|
|
gen6_render_ring_get_irq(struct intel_ring_buffer *ring)
|
|
{
|
|
return gen6_ring_get_irq(ring,
|
|
GT_USER_INTERRUPT,
|
|
GEN6_RENDER_USER_INTERRUPT);
|
|
}
|
|
|
|
static void
|
|
gen6_render_ring_put_irq(struct intel_ring_buffer *ring)
|
|
{
|
|
return gen6_ring_put_irq(ring,
|
|
GT_USER_INTERRUPT,
|
|
GEN6_RENDER_USER_INTERRUPT);
|
|
}
|
|
|
|
static bool
|
|
gen6_bsd_ring_get_irq(struct intel_ring_buffer *ring)
|
|
{
|
|
return gen6_ring_get_irq(ring,
|
|
GT_GEN6_BSD_USER_INTERRUPT,
|
|
GEN6_BSD_USER_INTERRUPT);
|
|
}
|
|
|
|
static void
|
|
gen6_bsd_ring_put_irq(struct intel_ring_buffer *ring)
|
|
{
|
|
return gen6_ring_put_irq(ring,
|
|
GT_GEN6_BSD_USER_INTERRUPT,
|
|
GEN6_BSD_USER_INTERRUPT);
|
|
}
|
|
|
|
#endif
|
|
|
|
/* ring buffer for Video Codec for Gen6+ */
|
|
static const struct intel_ring_buffer gen6_bsd_ring = {
|
|
.name = "gen6 bsd ring",
|
|
.id = RING_BSD,
|
|
.mmio_base = GEN6_BSD_RING_BASE,
|
|
.size = 32 * PAGE_SIZE,
|
|
.init = init_ring_common,
|
|
.write_tail = gen6_bsd_ring_write_tail,
|
|
.flush = gen6_ring_flush,
|
|
// .add_request = gen6_add_request,
|
|
// .get_seqno = ring_get_seqno,
|
|
// .irq_get = gen6_bsd_ring_get_irq,
|
|
// .irq_put = gen6_bsd_ring_put_irq,
|
|
// .dispatch_execbuffer = gen6_ring_dispatch_execbuffer,
|
|
};
|
|
|
|
#if 0
|
|
/* Blitter support (SandyBridge+) */
|
|
|
|
static bool
|
|
blt_ring_get_irq(struct intel_ring_buffer *ring)
|
|
{
|
|
return gen6_ring_get_irq(ring,
|
|
GT_BLT_USER_INTERRUPT,
|
|
GEN6_BLITTER_USER_INTERRUPT);
|
|
}
|
|
|
|
static void
|
|
blt_ring_put_irq(struct intel_ring_buffer *ring)
|
|
{
|
|
gen6_ring_put_irq(ring,
|
|
GT_BLT_USER_INTERRUPT,
|
|
GEN6_BLITTER_USER_INTERRUPT);
|
|
}
|
|
#endif
|
|
|
|
|
|
/* Workaround for some stepping of SNB,
|
|
* each time when BLT engine ring tail moved,
|
|
* the first command in the ring to be parsed
|
|
* should be MI_BATCH_BUFFER_START
|
|
*/
|
|
#define NEED_BLT_WORKAROUND(dev) \
|
|
(IS_GEN6(dev) && (dev->pdev->revision < 8))
|
|
|
|
static inline struct drm_i915_gem_object *
|
|
to_blt_workaround(struct intel_ring_buffer *ring)
|
|
{
|
|
return ring->private;
|
|
}
|
|
|
|
|
|
static int blt_ring_init(struct intel_ring_buffer *ring)
|
|
{
|
|
if (NEED_BLT_WORKAROUND(ring->dev)) {
|
|
struct drm_i915_gem_object *obj;
|
|
u32 *ptr;
|
|
int ret;
|
|
|
|
obj = i915_gem_alloc_object(ring->dev, 4096);
|
|
if (obj == NULL)
|
|
return -ENOMEM;
|
|
|
|
ret = i915_gem_object_pin(obj, 4096, true);
|
|
if (ret) {
|
|
// drm_gem_object_unreference(&obj->base);
|
|
return ret;
|
|
}
|
|
|
|
ptr = ioremap(obj->pages[0], 4096);
|
|
*ptr++ = MI_BATCH_BUFFER_END;
|
|
*ptr++ = MI_NOOP;
|
|
// iounmap(obj->pages[0]);
|
|
|
|
ret = i915_gem_object_set_to_gtt_domain(obj, false);
|
|
if (ret) {
|
|
// i915_gem_object_unpin(obj);
|
|
// drm_gem_object_unreference(&obj->base);
|
|
return ret;
|
|
}
|
|
|
|
ring->private = obj;
|
|
}
|
|
|
|
return init_ring_common(ring);
|
|
}
|
|
|
|
static int blt_ring_begin(struct intel_ring_buffer *ring,
|
|
int num_dwords)
|
|
{
|
|
if (ring->private) {
|
|
int ret = intel_ring_begin(ring, num_dwords+2);
|
|
if (ret)
|
|
return ret;
|
|
|
|
intel_ring_emit(ring, MI_BATCH_BUFFER_START);
|
|
intel_ring_emit(ring, to_blt_workaround(ring)->gtt_offset);
|
|
|
|
return 0;
|
|
} else
|
|
return intel_ring_begin(ring, 4);
|
|
}
|
|
|
|
static int blt_ring_flush(struct intel_ring_buffer *ring,
|
|
u32 invalidate, u32 flush)
|
|
{
|
|
uint32_t cmd;
|
|
int ret;
|
|
|
|
ret = blt_ring_begin(ring, 4);
|
|
if (ret)
|
|
return ret;
|
|
|
|
cmd = MI_FLUSH_DW;
|
|
if (invalidate & I915_GEM_DOMAIN_RENDER)
|
|
cmd |= MI_INVALIDATE_TLB;
|
|
intel_ring_emit(ring, cmd);
|
|
intel_ring_emit(ring, 0);
|
|
intel_ring_emit(ring, 0);
|
|
intel_ring_emit(ring, MI_NOOP);
|
|
intel_ring_advance(ring);
|
|
return 0;
|
|
}
|
|
|
|
static void blt_ring_cleanup(struct intel_ring_buffer *ring)
|
|
{
|
|
if (!ring->private)
|
|
return;
|
|
|
|
i915_gem_object_unpin(ring->private);
|
|
drm_gem_object_unreference(ring->private);
|
|
ring->private = NULL;
|
|
}
|
|
|
|
|
|
static const struct intel_ring_buffer gen6_blt_ring = {
|
|
.name = "blt ring",
|
|
.id = RING_BLT,
|
|
.mmio_base = BLT_RING_BASE,
|
|
.size = 32 * PAGE_SIZE,
|
|
.init = blt_ring_init,
|
|
.write_tail = ring_write_tail,
|
|
.flush = blt_ring_flush,
|
|
// .add_request = gen6_add_request,
|
|
// .get_seqno = ring_get_seqno,
|
|
// .irq_get = blt_ring_get_irq,
|
|
// .irq_put = blt_ring_put_irq,
|
|
// .dispatch_execbuffer = gen6_ring_dispatch_execbuffer,
|
|
// .cleanup = blt_ring_cleanup,
|
|
};
|
|
|
|
|
|
|
|
int intel_init_render_ring_buffer(struct drm_device *dev)
|
|
{
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
struct intel_ring_buffer *ring = &dev_priv->ring[RCS];
|
|
ENTER();
|
|
*ring = render_ring;
|
|
if (INTEL_INFO(dev)->gen >= 6) {
|
|
// ring->add_request = gen6_add_request;
|
|
// ring->irq_get = gen6_render_ring_get_irq;
|
|
// ring->irq_put = gen6_render_ring_put_irq;
|
|
} else if (IS_GEN5(dev)) {
|
|
// ring->add_request = pc_render_add_request;
|
|
// ring->get_seqno = pc_render_get_seqno;
|
|
}
|
|
|
|
if (!I915_NEED_GFX_HWS(dev)) {
|
|
ring->status_page.page_addr = dev_priv->status_page_dmah->vaddr;
|
|
memset(ring->status_page.page_addr, 0, PAGE_SIZE);
|
|
}
|
|
LEAVE();
|
|
return intel_init_ring_buffer(dev, ring);
|
|
}
|
|
|
|
|
|
int intel_init_bsd_ring_buffer(struct drm_device *dev)
|
|
{
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
struct intel_ring_buffer *ring = &dev_priv->ring[VCS];
|
|
|
|
if (IS_GEN6(dev) || IS_GEN7(dev))
|
|
*ring = gen6_bsd_ring;
|
|
else
|
|
*ring = bsd_ring;
|
|
|
|
return intel_init_ring_buffer(dev, ring);
|
|
}
|
|
|
|
int intel_init_blt_ring_buffer(struct drm_device *dev)
|
|
{
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
struct intel_ring_buffer *ring = &dev_priv->ring[BCS];
|
|
|
|
*ring = gen6_blt_ring;
|
|
|
|
return intel_init_ring_buffer(dev, ring);
|
|
}
|