Commit d8d9abcd authored by Daniel Vetter's avatar Daniel Vetter Committed by Chris Wilson
Browse files

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: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
parent 3e921f98

drivers/char/agp/intel-gtt.c

+56 −52
Original line number Diff line number Diff line
@@ -534,11 +534,12 @@ static struct aper_size_info_fixed intel_i830_sizes[] = 
static unsigned int intel_gtt_stolen_entries(void)

{

	u16 gmch_ctrl;

	unsigned int gtt_entries = 0;

	u8 rdct;

	int local = 0;

	static const int ddt[4] = { 0, 16, 32, 64 };

	int size; /* reserved space (in kb) at the top of stolen memory */

	unsigned int overhead_entries, stolen_entries;

	unsigned int stolen_size = 0;



	pci_read_config_word(intel_private.bridge_dev,

			     I830_GMCH_CTRL, &gmch_ctrl);
@@ -605,26 +606,28 @@ static unsigned int intel_gtt_stolen_entries(void) 
		size = agp_bridge->driver->fetch_size() + 4;

	}



	overhead_entries = size/4;



	if (intel_private.bridge_dev->device == PCI_DEVICE_ID_INTEL_82830_HB ||

	    intel_private.bridge_dev->device == PCI_DEVICE_ID_INTEL_82845G_HB) {

		switch (gmch_ctrl & I830_GMCH_GMS_MASK) {

		case I830_GMCH_GMS_STOLEN_512:

			gtt_entries = KB(512) - KB(size);

			stolen_size = KB(512);

			break;

		case I830_GMCH_GMS_STOLEN_1024:

			gtt_entries = MB(1) - KB(size);

			stolen_size = MB(1);

			break;

		case I830_GMCH_GMS_STOLEN_8192:

			gtt_entries = MB(8) - KB(size);

			stolen_size = MB(8);

			break;

		case I830_GMCH_GMS_LOCAL:

			rdct = readb(intel_private.registers+I830_RDRAM_CHANNEL_TYPE);

			gtt_entries = (I830_RDRAM_ND(rdct) + 1) *

			stolen_size = (I830_RDRAM_ND(rdct) + 1) *

					MB(ddt[I830_RDRAM_DDT(rdct)]);

			local = 1;

			break;

		default:

			gtt_entries = 0;

			stolen_size = 0;

			break;

		}

	} else if (IS_SNB) {
@@ -635,143 +638,144 @@ static unsigned int intel_gtt_stolen_entries(void) 
		pci_read_config_word(intel_private.pcidev, SNB_GMCH_CTRL, &snb_gmch_ctl);

		switch (snb_gmch_ctl & SNB_GMCH_GMS_STOLEN_MASK) {

		case SNB_GMCH_GMS_STOLEN_32M:

			gtt_entries = MB(32) - KB(size);

			stolen_size = MB(32);

			break;

		case SNB_GMCH_GMS_STOLEN_64M:

			gtt_entries = MB(64) - KB(size);

			stolen_size = MB(64);

			break;

		case SNB_GMCH_GMS_STOLEN_96M:

			gtt_entries = MB(96) - KB(size);

			stolen_size = MB(96);

			break;

		case SNB_GMCH_GMS_STOLEN_128M:

			gtt_entries = MB(128) - KB(size);

			stolen_size = MB(128);

			break;

		case SNB_GMCH_GMS_STOLEN_160M:

			gtt_entries = MB(160) - KB(size);

			stolen_size = MB(160);

			break;

		case SNB_GMCH_GMS_STOLEN_192M:

			gtt_entries = MB(192) - KB(size);

			stolen_size = MB(192);

			break;

		case SNB_GMCH_GMS_STOLEN_224M:

			gtt_entries = MB(224) - KB(size);

			stolen_size = MB(224);

			break;

		case SNB_GMCH_GMS_STOLEN_256M:

			gtt_entries = MB(256) - KB(size);

			stolen_size = MB(256);

			break;

		case SNB_GMCH_GMS_STOLEN_288M:

			gtt_entries = MB(288) - KB(size);

			stolen_size = MB(288);

			break;

		case SNB_GMCH_GMS_STOLEN_320M:

			gtt_entries = MB(320) - KB(size);

			stolen_size = MB(320);

			break;

		case SNB_GMCH_GMS_STOLEN_352M:

			gtt_entries = MB(352) - KB(size);

			stolen_size = MB(352);

			break;

		case SNB_GMCH_GMS_STOLEN_384M:

			gtt_entries = MB(384) - KB(size);

			stolen_size = MB(384);

			break;

		case SNB_GMCH_GMS_STOLEN_416M:

			gtt_entries = MB(416) - KB(size);

			stolen_size = MB(416);

			break;

		case SNB_GMCH_GMS_STOLEN_448M:

			gtt_entries = MB(448) - KB(size);

			stolen_size = MB(448);

			break;

		case SNB_GMCH_GMS_STOLEN_480M:

			gtt_entries = MB(480) - KB(size);

			stolen_size = MB(480);

			break;

		case SNB_GMCH_GMS_STOLEN_512M:

			gtt_entries = MB(512) - KB(size);

			stolen_size = MB(512);

			break;

		}

	} else {

		switch (gmch_ctrl & I855_GMCH_GMS_MASK) {

		case I855_GMCH_GMS_STOLEN_1M:

			gtt_entries = MB(1) - KB(size);

			stolen_size = MB(1);

			break;

		case I855_GMCH_GMS_STOLEN_4M:

			gtt_entries = MB(4) - KB(size);

			stolen_size = MB(4);

			break;

		case I855_GMCH_GMS_STOLEN_8M:

			gtt_entries = MB(8) - KB(size);

			stolen_size = MB(8);

			break;

		case I855_GMCH_GMS_STOLEN_16M:

			gtt_entries = MB(16) - KB(size);

			stolen_size = MB(16);

			break;

		case I855_GMCH_GMS_STOLEN_32M:

			gtt_entries = MB(32) - KB(size);

			stolen_size = MB(32);

			break;

		case I915_GMCH_GMS_STOLEN_48M:

			/* Check it's really I915G */

			if (IS_I915 || IS_I965 || IS_G33 || IS_G4X)

				gtt_entries = MB(48) - KB(size);

				stolen_size = MB(48);

			else

				gtt_entries = 0;

				stolen_size = 0;

			break;

		case I915_GMCH_GMS_STOLEN_64M:

			/* Check it's really I915G */

			if (IS_I915 || IS_I965 || IS_G33 || IS_G4X)

				gtt_entries = MB(64) - KB(size);

				stolen_size = MB(64);

			else

				gtt_entries = 0;

				stolen_size = 0;

			break;

		case G33_GMCH_GMS_STOLEN_128M:

			if (IS_G33 || IS_I965 || IS_G4X)

				gtt_entries = MB(128) - KB(size);

				stolen_size = MB(128);

			else

				gtt_entries = 0;

				stolen_size = 0;

			break;

		case G33_GMCH_GMS_STOLEN_256M:

			if (IS_G33 || IS_I965 || IS_G4X)

				gtt_entries = MB(256) - KB(size);

				stolen_size = MB(256);

			else

				gtt_entries = 0;

				stolen_size = 0;

			break;

		case INTEL_GMCH_GMS_STOLEN_96M:

			if (IS_I965 || IS_G4X)

				gtt_entries = MB(96) - KB(size);

				stolen_size = MB(96);

			else

				gtt_entries = 0;

				stolen_size = 0;

			break;

		case INTEL_GMCH_GMS_STOLEN_160M:

			if (IS_I965 || IS_G4X)

				gtt_entries = MB(160) - KB(size);

				stolen_size = MB(160);

			else

				gtt_entries = 0;

				stolen_size = 0;

			break;

		case INTEL_GMCH_GMS_STOLEN_224M:

			if (IS_I965 || IS_G4X)

				gtt_entries = MB(224) - KB(size);

				stolen_size = MB(224);

			else

				gtt_entries = 0;

				stolen_size = 0;

			break;

		case INTEL_GMCH_GMS_STOLEN_352M:

			if (IS_I965 || IS_G4X)

				gtt_entries = MB(352) - KB(size);

				stolen_size = MB(352);

			else

				gtt_entries = 0;

				stolen_size = 0;

			break;

		default:

			gtt_entries = 0;

			stolen_size = 0;

			break;

		}

	}



	if (!local && gtt_entries > intel_max_stolen) {

	if (!local && stolen_size > intel_max_stolen) {

		dev_info(&intel_private.bridge_dev->dev,

			 "detected %dK stolen memory, trimming to %dK\n",

			 gtt_entries / KB(1), intel_max_stolen / KB(1));

		gtt_entries = intel_max_stolen / KB(4);

	} else if (gtt_entries > 0) {

			 stolen_size / KB(1), intel_max_stolen / KB(1));

		stolen_size = intel_max_stolen;

	} else if (stolen_size > 0) {

		dev_info(&intel_private.bridge_dev->dev, "detected %dK %s memory\n",

		       gtt_entries / KB(1), local ? "local" : "stolen");

		gtt_entries /= KB(4);

		       stolen_size / KB(1), local ? "local" : "stolen");

	} else {

		dev_info(&intel_private.bridge_dev->dev,

		       "no pre-allocated video memory detected\n");

		gtt_entries = 0;

		stolen_size = 0;

	}



	return gtt_entries;

	stolen_entries = stolen_size/KB(4) - overhead_entries;



	return stolen_entries;

}



static unsigned int intel_gtt_mappable_entries(void)

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