Similar to gtt_mappable_entries we don't usually want the entries,
it's easy enough to calculate it when you need.
Signed-off-by: Ben Widawsky <ben at bwidawsk.net>
---
drivers/gpu/drm/i915/i915_drv.h | 3 +++
drivers/gpu/drm/i915/i915_gem_gtt.c | 28 ++++++++++++++++------------
2 files changed, 19 insertions(+), 12 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 51766d2..9d8f196 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -374,6 +374,7 @@ struct intel_device_info {
struct i915_gtt {
unsigned long start; /* Start offset of used GTT */
size_t total; /* Total size GTT can map */
+ size_t used; /* Amount used <= total */
unsigned long mappable_end; /* End offset that we can CPU map */
struct io_mapping *mappable; /* Mapping to our CPU mappable region */
@@ -381,7 +382,9 @@ struct i915_gtt {
/** "Graphics Stolen Memory" holds the global PTEs */
void __iomem *gsm;
+
};
+#define gtt_total_entries(gtt) ((gtt).total >> PAGE_SHIFT)
#define I915_PPGTT_PD_ENTRIES 512
#define I915_PPGTT_PT_ENTRIES 1024
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 46e9544..5a7a4a9 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -119,7 +119,8 @@ int i915_gem_init_aliasing_ppgtt(struct drm_device *dev)
/* ppgtt PDEs reside in the global gtt pagetable, which has 512*1024
* entries. For aliasing ppgtt support we just steal them at the end for
* now. */
- first_pd_entry_in_global_pt = dev_priv->mm.gtt->gtt_total_entries - I915_PPGTT_PD_ENTRIES;
+ first_pd_entry_in_global_pt =
+ gtt_total_entries(dev_priv->gtt) - I915_PPGTT_PD_ENTRIES;
ppgtt = kzalloc(sizeof(*ppgtt), GFP_KERNEL);
if (!ppgtt)
@@ -368,7 +369,7 @@ static void i915_ggtt_clear_range(struct drm_device *dev,
struct drm_i915_private *dev_priv = dev->dev_private;
gtt_pte_t scratch_pte;
gtt_pte_t __iomem *gtt_base = (gtt_pte_t __iomem *) dev_priv->gtt.gsm + first_entry;
- const int max_entries = dev_priv->mm.gtt->gtt_total_entries - first_entry;
+ const int max_entries = gtt_total_entries(dev_priv->gtt) - first_entry;
int i;
if (INTEL_INFO(dev)->gen < 6) {
@@ -431,7 +432,7 @@ static void gen6_ggtt_bind_object(struct drm_i915_gem_object *obj,
struct sg_table *st = obj->pages;
struct scatterlist *sg = st->sgl;
const int first_entry = obj->gtt_space->start >> PAGE_SHIFT;
- const int max_entries = dev_priv->mm.gtt->gtt_total_entries - first_entry;
+ const int max_entries = gtt_total_entries(dev_priv->gtt) - first_entry;
gtt_pte_t __iomem *gtt_entries =
(gtt_pte_t __iomem *)dev_priv->gtt.gsm + first_entry;
int unused, i = 0;
@@ -557,7 +558,9 @@ void i915_gem_setup_global_gtt(struct drm_device *dev,
}
dev_priv->gtt.start = start;
- dev_priv->gtt.total = end - start;
+ dev_priv->gtt.used = end - start;
+ if (dev_priv->gtt.used < dev_priv->gtt.total)
+ DRM_DEBUG_DRIVER("Warning: using less than total memory\n");
/* Clear any non-preallocated blocks */
drm_mm_for_each_hole(entry, &dev_priv->mm.gtt_space,
@@ -594,7 +597,7 @@ void i915_gem_init_global_gtt(struct drm_device *dev)
unsigned long gtt_size, mappable_size;
int ret;
- gtt_size = dev_priv->mm.gtt->gtt_total_entries << PAGE_SHIFT;
+ gtt_size = dev_priv->gtt.total;
mappable_size = dev_priv->gtt.mappable_end;
if (intel_enable_ppgtt(dev) && HAS_ALIASING_PPGTT(dev)) {
@@ -687,6 +690,7 @@ int i915_gem_gtt_init(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
phys_addr_t gtt_bus_addr;
+ u32 gtt_size;
u16 snb_gmch_ctl;
int ret;
@@ -716,15 +720,15 @@ int i915_gem_gtt_init(struct drm_device *dev)
if (!pci_set_dma_mask(dev->pdev, DMA_BIT_MASK(40)))
pci_set_consistent_dma_mask(dev->pdev, DMA_BIT_MASK(40));
+ pci_read_config_word(dev->pdev, SNB_GMCH_CTRL, &snb_gmch_ctl);
+
/* For GEN6+ the PTEs for the ggtt live at 2MB + BAR0 */
gtt_bus_addr = pci_resource_start(dev->pdev, 0) + (2<<20);
dev_priv->gtt.mappable_base = pci_resource_start(dev->pdev, 2);
dev_priv->gtt.mappable_end = pci_resource_len(dev->pdev, 2);
+ gtt_size = gen6_get_total_gtt_size(snb_gmch_ctl);
+ dev_priv->gtt.total = (gtt_size / sizeof(gtt_pte_t)) << PAGE_SHIFT;
- /* i9xx_setup */
- pci_read_config_word(dev->pdev, SNB_GMCH_CTRL, &snb_gmch_ctl);
- dev_priv->mm.gtt->gtt_total_entries =
- gen6_get_total_gtt_size(snb_gmch_ctl) / sizeof(gtt_pte_t);
if (INTEL_INFO(dev)->gen < 7)
dev_priv->mm.gtt->stolen_size = gen6_get_stolen_size(snb_gmch_ctl);
else
@@ -747,8 +751,7 @@ int i915_gem_gtt_init(struct drm_device *dev)
goto err_out;
}
- dev_priv->gtt.gsm = ioremap_wc(gtt_bus_addr,
- dev_priv->mm.gtt->gtt_total_entries * sizeof(gtt_pte_t));
+ dev_priv->gtt.gsm = ioremap_wc(gtt_bus_addr, gtt_size);
if (!dev_priv->gtt.gsm) {
DRM_ERROR("Failed to map the gtt page table\n");
teardown_scratch_page(dev);
@@ -757,7 +760,8 @@ int i915_gem_gtt_init(struct drm_device *dev)
}
/* GMADR is the PCI aperture used by SW to access tiled GFX surfaces in a linear fashion. */
- DRM_INFO("Memory usable by graphics device = %dM\n", dev_priv->mm.gtt->gtt_total_entries >> 8);
+ DRM_INFO("Memory usable by graphics device = %zdM\n",
+ dev_priv->gtt.total >> 20);
DRM_DEBUG_DRIVER("GMADR size = %ldM\n", dev_priv->gtt.mappable_end >> 20);
DRM_DEBUG_DRIVER("GTT stolen size = %dM\n", dev_priv->mm.gtt->stolen_size >> 20);
--
1.8.1
