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Date: Thu, 9 May 2013 12:46:24 -0700
From: Andy Lutomirski <luto@...capital.net>
To: linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
linux-fbdev@...r.kernel.org
Cc: Daniel Vetter <daniel.vetter@...ll.ch>,
Jerome Glisse <j.glisse@...il.com>,
Alex Deucher <alexdeucher@...il.com>,
Dave Airlie <airlied@...il.com>,
Andy Lutomirski <luto@...capital.net>
Subject: [RFC/PATCH v2 5/8] i915: Use arch_phys_wc_{add,del}
i915 open-coded logic that was essentially equivalent to the new API.
Signed-off-by: Andy Lutomirski <luto@...capital.net>
---
Changes from v1: More cleanup
drivers/gpu/drm/i915/i915_dma.c | 44 ++++++-----------------------------------
1 file changed, 6 insertions(+), 38 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index 4fa6beb..cfdfb45 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -42,7 +42,6 @@
#include <linux/vga_switcheroo.h>
#include <linux/slab.h>
#include <acpi/video.h>
-#include <asm/pat.h>
#define LP_RING(d) (&((struct drm_i915_private *)(d))->ring[RCS])
@@ -1393,29 +1392,6 @@ void i915_master_destroy(struct drm_device *dev, struct drm_master *master)
master->driver_priv = NULL;
}
-static void
-i915_mtrr_setup(struct drm_i915_private *dev_priv, unsigned long base,
- unsigned long size)
-{
- dev_priv->mm.gtt_mtrr = -1;
-
-#if defined(CONFIG_X86_PAT)
- if (cpu_has_pat)
- return;
-#endif
-
- /* Set up a WC MTRR for non-PAT systems. This is more common than
- * one would think, because the kernel disables PAT on first
- * generation Core chips because WC PAT gets overridden by a UC
- * MTRR if present. Even if a UC MTRR isn't present.
- */
- dev_priv->mm.gtt_mtrr = mtrr_add(base, size, MTRR_TYPE_WRCOMB, 1);
- if (dev_priv->mm.gtt_mtrr < 0) {
- DRM_INFO("MTRR allocation failed. Graphics "
- "performance may suffer.\n");
- }
-}
-
static void i915_kick_out_firmware_fb(struct drm_i915_private *dev_priv)
{
struct apertures_struct *ap;
@@ -1552,8 +1528,8 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
goto out_rmmap;
}
- i915_mtrr_setup(dev_priv, dev_priv->gtt.mappable_base,
- aperture_size);
+ dev_priv->mm.gtt_mtrr = arch_phys_wc_add(dev_priv->gtt.mappable_base,
+ aperture_size);
/* The i915 workqueue is primarily used for batched retirement of
* requests (and thus managing bo) once the task has been completed
@@ -1656,12 +1632,8 @@ out_gem_unload:
intel_teardown_mchbar(dev);
destroy_workqueue(dev_priv->wq);
out_mtrrfree:
- if (dev_priv->mm.gtt_mtrr >= 0) {
- mtrr_del(dev_priv->mm.gtt_mtrr,
- dev_priv->gtt.mappable_base,
- aperture_size);
- dev_priv->mm.gtt_mtrr = -1;
- }
+ arch_phys_wc_del(dev_priv->mm.gtt_mtrr);
+ dev_priv->mm.gtt_mtrr = 0;
io_mapping_free(dev_priv->gtt.mappable);
out_rmmap:
pci_iounmap(dev->pdev, dev_priv->regs);
@@ -1697,12 +1669,8 @@ int i915_driver_unload(struct drm_device *dev)
cancel_delayed_work_sync(&dev_priv->mm.retire_work);
io_mapping_free(dev_priv->gtt.mappable);
- if (dev_priv->mm.gtt_mtrr >= 0) {
- mtrr_del(dev_priv->mm.gtt_mtrr,
- dev_priv->gtt.mappable_base,
- dev_priv->gtt.mappable_end);
- dev_priv->mm.gtt_mtrr = -1;
- }
+ arch_phys_wc_del(dev_priv->mm.gtt_mtrr);
+ dev_priv->mm.gtt_mtrr = 0;
acpi_video_unregister();
--
1.8.1.4
--
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