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intel-gtt: sane variable names for intel_gtt_stolen_entries
This somewhat aligns it with the version in drm/i915/i915_dma.c. Changes: - s/gtt_entries/stolen_size - track overhead entries in a seperate var (the effective gtt size calculation will be extracted later on). - subtract the overhead at the end instead of in each clause. Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Daniel Vetter
Chris Wilson
parent
3e921f980f
commit
d8d9abcd35
@ -534,11 +534,12 @@ static struct aper_size_info_fixed intel_i830_sizes[] =
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static unsigned int intel_gtt_stolen_entries(void)
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{
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u16 gmch_ctrl;
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unsigned int gtt_entries = 0;
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u8 rdct;
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int local = 0;
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static const int ddt[4] = { 0, 16, 32, 64 };
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int size; /* reserved space (in kb) at the top of stolen memory */
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unsigned int overhead_entries, stolen_entries;
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unsigned int stolen_size = 0;
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pci_read_config_word(intel_private.bridge_dev,
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I830_GMCH_CTRL, &gmch_ctrl);
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@ -605,26 +606,28 @@ static unsigned int intel_gtt_stolen_entries(void)
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size = agp_bridge->driver->fetch_size() + 4;
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}
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overhead_entries = size/4;
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if (intel_private.bridge_dev->device == PCI_DEVICE_ID_INTEL_82830_HB ||
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intel_private.bridge_dev->device == PCI_DEVICE_ID_INTEL_82845G_HB) {
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switch (gmch_ctrl & I830_GMCH_GMS_MASK) {
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case I830_GMCH_GMS_STOLEN_512:
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gtt_entries = KB(512) - KB(size);
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stolen_size = KB(512);
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break;
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case I830_GMCH_GMS_STOLEN_1024:
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gtt_entries = MB(1) - KB(size);
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stolen_size = MB(1);
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break;
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case I830_GMCH_GMS_STOLEN_8192:
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gtt_entries = MB(8) - KB(size);
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stolen_size = MB(8);
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break;
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case I830_GMCH_GMS_LOCAL:
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rdct = readb(intel_private.registers+I830_RDRAM_CHANNEL_TYPE);
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gtt_entries = (I830_RDRAM_ND(rdct) + 1) *
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stolen_size = (I830_RDRAM_ND(rdct) + 1) *
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MB(ddt[I830_RDRAM_DDT(rdct)]);
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local = 1;
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break;
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default:
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gtt_entries = 0;
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stolen_size = 0;
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break;
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}
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} else if (IS_SNB) {
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@ -635,143 +638,144 @@ static unsigned int intel_gtt_stolen_entries(void)
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pci_read_config_word(intel_private.pcidev, SNB_GMCH_CTRL, &snb_gmch_ctl);
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switch (snb_gmch_ctl & SNB_GMCH_GMS_STOLEN_MASK) {
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case SNB_GMCH_GMS_STOLEN_32M:
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gtt_entries = MB(32) - KB(size);
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stolen_size = MB(32);
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break;
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case SNB_GMCH_GMS_STOLEN_64M:
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gtt_entries = MB(64) - KB(size);
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stolen_size = MB(64);
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break;
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case SNB_GMCH_GMS_STOLEN_96M:
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gtt_entries = MB(96) - KB(size);
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stolen_size = MB(96);
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break;
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case SNB_GMCH_GMS_STOLEN_128M:
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gtt_entries = MB(128) - KB(size);
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stolen_size = MB(128);
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break;
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case SNB_GMCH_GMS_STOLEN_160M:
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gtt_entries = MB(160) - KB(size);
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stolen_size = MB(160);
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break;
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case SNB_GMCH_GMS_STOLEN_192M:
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gtt_entries = MB(192) - KB(size);
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stolen_size = MB(192);
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break;
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case SNB_GMCH_GMS_STOLEN_224M:
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gtt_entries = MB(224) - KB(size);
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stolen_size = MB(224);
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break;
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case SNB_GMCH_GMS_STOLEN_256M:
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gtt_entries = MB(256) - KB(size);
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stolen_size = MB(256);
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break;
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case SNB_GMCH_GMS_STOLEN_288M:
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gtt_entries = MB(288) - KB(size);
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stolen_size = MB(288);
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break;
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case SNB_GMCH_GMS_STOLEN_320M:
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gtt_entries = MB(320) - KB(size);
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stolen_size = MB(320);
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break;
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case SNB_GMCH_GMS_STOLEN_352M:
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gtt_entries = MB(352) - KB(size);
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stolen_size = MB(352);
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break;
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case SNB_GMCH_GMS_STOLEN_384M:
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gtt_entries = MB(384) - KB(size);
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stolen_size = MB(384);
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break;
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case SNB_GMCH_GMS_STOLEN_416M:
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gtt_entries = MB(416) - KB(size);
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stolen_size = MB(416);
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break;
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case SNB_GMCH_GMS_STOLEN_448M:
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gtt_entries = MB(448) - KB(size);
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stolen_size = MB(448);
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break;
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case SNB_GMCH_GMS_STOLEN_480M:
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gtt_entries = MB(480) - KB(size);
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stolen_size = MB(480);
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break;
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case SNB_GMCH_GMS_STOLEN_512M:
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gtt_entries = MB(512) - KB(size);
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stolen_size = MB(512);
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break;
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}
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} else {
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switch (gmch_ctrl & I855_GMCH_GMS_MASK) {
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case I855_GMCH_GMS_STOLEN_1M:
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gtt_entries = MB(1) - KB(size);
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stolen_size = MB(1);
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break;
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case I855_GMCH_GMS_STOLEN_4M:
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gtt_entries = MB(4) - KB(size);
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stolen_size = MB(4);
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break;
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case I855_GMCH_GMS_STOLEN_8M:
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gtt_entries = MB(8) - KB(size);
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stolen_size = MB(8);
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break;
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case I855_GMCH_GMS_STOLEN_16M:
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gtt_entries = MB(16) - KB(size);
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stolen_size = MB(16);
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break;
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case I855_GMCH_GMS_STOLEN_32M:
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gtt_entries = MB(32) - KB(size);
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stolen_size = MB(32);
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break;
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case I915_GMCH_GMS_STOLEN_48M:
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/* Check it's really I915G */
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if (IS_I915 || IS_I965 || IS_G33 || IS_G4X)
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gtt_entries = MB(48) - KB(size);
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stolen_size = MB(48);
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else
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gtt_entries = 0;
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stolen_size = 0;
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break;
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case I915_GMCH_GMS_STOLEN_64M:
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/* Check it's really I915G */
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if (IS_I915 || IS_I965 || IS_G33 || IS_G4X)
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gtt_entries = MB(64) - KB(size);
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stolen_size = MB(64);
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else
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gtt_entries = 0;
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stolen_size = 0;
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break;
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case G33_GMCH_GMS_STOLEN_128M:
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if (IS_G33 || IS_I965 || IS_G4X)
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gtt_entries = MB(128) - KB(size);
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stolen_size = MB(128);
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else
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gtt_entries = 0;
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stolen_size = 0;
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break;
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case G33_GMCH_GMS_STOLEN_256M:
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if (IS_G33 || IS_I965 || IS_G4X)
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gtt_entries = MB(256) - KB(size);
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stolen_size = MB(256);
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else
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gtt_entries = 0;
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stolen_size = 0;
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break;
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case INTEL_GMCH_GMS_STOLEN_96M:
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if (IS_I965 || IS_G4X)
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gtt_entries = MB(96) - KB(size);
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stolen_size = MB(96);
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else
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gtt_entries = 0;
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stolen_size = 0;
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break;
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case INTEL_GMCH_GMS_STOLEN_160M:
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if (IS_I965 || IS_G4X)
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gtt_entries = MB(160) - KB(size);
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stolen_size = MB(160);
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else
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gtt_entries = 0;
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stolen_size = 0;
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break;
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case INTEL_GMCH_GMS_STOLEN_224M:
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if (IS_I965 || IS_G4X)
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gtt_entries = MB(224) - KB(size);
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stolen_size = MB(224);
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else
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gtt_entries = 0;
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stolen_size = 0;
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break;
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case INTEL_GMCH_GMS_STOLEN_352M:
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if (IS_I965 || IS_G4X)
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gtt_entries = MB(352) - KB(size);
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stolen_size = MB(352);
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else
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gtt_entries = 0;
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stolen_size = 0;
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break;
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default:
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gtt_entries = 0;
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stolen_size = 0;
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break;
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}
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}
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if (!local && gtt_entries > intel_max_stolen) {
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if (!local && stolen_size > intel_max_stolen) {
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dev_info(&intel_private.bridge_dev->dev,
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"detected %dK stolen memory, trimming to %dK\n",
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gtt_entries / KB(1), intel_max_stolen / KB(1));
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gtt_entries = intel_max_stolen / KB(4);
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} else if (gtt_entries > 0) {
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stolen_size / KB(1), intel_max_stolen / KB(1));
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stolen_size = intel_max_stolen;
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} else if (stolen_size > 0) {
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dev_info(&intel_private.bridge_dev->dev, "detected %dK %s memory\n",
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gtt_entries / KB(1), local ? "local" : "stolen");
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gtt_entries /= KB(4);
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stolen_size / KB(1), local ? "local" : "stolen");
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} else {
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dev_info(&intel_private.bridge_dev->dev,
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"no pre-allocated video memory detected\n");
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gtt_entries = 0;
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stolen_size = 0;
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}
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return gtt_entries;
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stolen_entries = stolen_size/KB(4) - overhead_entries;
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return stolen_entries;
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}
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static unsigned int intel_gtt_mappable_entries(void)
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