Commit 14be93dd authored by Daniel Vetter's avatar Daniel Vetter
Browse files

drm/i915 + agp/intel-gtt: prep work for direct setup 



To be able to directly set up the intel-gtt code from drm/i915 and
avoid setting up the fake-agp driver we need to prepare a few things:
- pass both the bridge and gpu pci_dev to the probe function and add
  code to handle the gpu pdev both being present (for drm/i915) and
  not present (fake agp).
- add refcounting to the remove function so that unloading drm/i915
  doesn't kill the fake agp driver

v2: Fix up the cleanup and refcount, noticed by Jani Nikula.

Reviewed-by: default avatarJani Nikula <jani.nikula@linux.intel.com>
Signed-Off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent 7e8f6306

drivers/char/agp/intel-agp.c

+3 −2
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@ 
#include <asm/smp.h>

#include "agp.h"

#include "intel-agp.h"

#include <drm/intel-gtt.h>



int intel_agp_enabled;

EXPORT_SYMBOL(intel_agp_enabled);
@@ -747,7 +748,7 @@ static int __devinit agp_intel_probe(struct pci_dev *pdev, 


	bridge->capndx = cap_ptr;



	if (intel_gmch_probe(pdev, bridge))

	if (intel_gmch_probe(pdev, NULL, bridge))

		goto found_gmch;



	for (i = 0; intel_agp_chipsets[i].name != NULL; i++) {
@@ -824,7 +825,7 @@ static void __devexit agp_intel_remove(struct pci_dev *pdev) 


	agp_remove_bridge(bridge);



	intel_gmch_remove(pdev);

	intel_gmch_remove();



	agp_put_bridge(bridge);

}

drivers/char/agp/intel-agp.h

+0 −3
Original line number Diff line number Diff line
@@ -250,7 +250,4 @@ 
#define PCI_DEVICE_ID_INTEL_HASWELL_SDV		0x0c16 /* SDV */

#define PCI_DEVICE_ID_INTEL_HASWELL_E_HB			0x0c04



int intel_gmch_probe(struct pci_dev *pdev,

			       struct agp_bridge_data *bridge);

void intel_gmch_remove(struct pci_dev *pdev);

#endif

drivers/char/agp/intel-gtt.c

+37 −9
Original line number Diff line number Diff line
@@ -75,6 +75,7 @@ static struct _intel_private { 
	struct resource ifp_resource;

	int resource_valid;

	struct page *scratch_page;

	int refcount;

} intel_private;



#define INTEL_GTT_GEN	intel_private.driver->gen
@@ -1522,14 +1523,32 @@ static int find_gmch(u16 device) 
	return 1;

}



int intel_gmch_probe(struct pci_dev *pdev,

int intel_gmch_probe(struct pci_dev *bridge_pdev, struct pci_dev *gpu_pdev,

		     struct agp_bridge_data *bridge)

{

	int i, mask;

	intel_private.driver = NULL;



	/*

	 * Can be called from the fake agp driver but also directly from

	 * drm/i915.ko. Hence we need to check whether everything is set up

	 * already.

	 */

	if (intel_private.driver) {

		intel_private.refcount++;

		return 1;

	}



	for (i = 0; intel_gtt_chipsets[i].name != NULL; i++) {

		if (find_gmch(intel_gtt_chipsets[i].gmch_chip_id)) {

		if (gpu_pdev) {

			if (gpu_pdev->device ==

			    intel_gtt_chipsets[i].gmch_chip_id) {

				intel_private.pcidev = pci_dev_get(gpu_pdev);

				intel_private.driver =

					intel_gtt_chipsets[i].gtt_driver;



				break;

			}

		} else if (find_gmch(intel_gtt_chipsets[i].gmch_chip_id)) {

			intel_private.driver =

				intel_gtt_chipsets[i].gtt_driver;

			break;
@@ -1539,15 +1558,17 @@ int intel_gmch_probe(struct pci_dev *pdev, 
	if (!intel_private.driver)

		return 0;



	intel_private.refcount++;



	if (bridge) {

		bridge->driver = &intel_fake_agp_driver;

		bridge->dev_private_data = &intel_private;

		bridge->dev = pdev;

		bridge->dev = bridge_pdev;

	}



	intel_private.bridge_dev = pci_dev_get(pdev);

	intel_private.bridge_dev = pci_dev_get(bridge_pdev);



	dev_info(&pdev->dev, "Intel %s Chipset\n", intel_gtt_chipsets[i].name);

	dev_info(&bridge_pdev->dev, "Intel %s Chipset\n", intel_gtt_chipsets[i].name);



	mask = intel_private.driver->dma_mask_size;

	if (pci_set_dma_mask(intel_private.pcidev, DMA_BIT_MASK(mask)))
@@ -1557,8 +1578,11 @@ int intel_gmch_probe(struct pci_dev *pdev, 
		pci_set_consistent_dma_mask(intel_private.pcidev,

					    DMA_BIT_MASK(mask));



	if (intel_gtt_init() != 0)

	if (intel_gtt_init() != 0) {

		intel_gmch_remove();



		return 0;

	}



	return 1;

}
@@ -1577,12 +1601,16 @@ void intel_gtt_chipset_flush(void) 
}

EXPORT_SYMBOL(intel_gtt_chipset_flush);



void intel_gmch_remove(struct pci_dev *pdev)

void intel_gmch_remove(void)

{

	if (--intel_private.refcount)

		return;



	if (intel_private.pcidev)

		pci_dev_put(intel_private.pcidev);

	if (intel_private.bridge_dev)

		pci_dev_put(intel_private.bridge_dev);

	intel_private.driver = NULL;

}

EXPORT_SYMBOL(intel_gmch_remove);

drivers/gpu/drm/i915/i915_dma.c

+11 −2
Original line number Diff line number Diff line
@@ -1474,11 +1474,18 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags) 
		goto put_bridge;

	}



	ret = intel_gmch_probe(dev_priv->bridge_dev, dev->pdev, NULL);

	if (!ret) {

		DRM_ERROR("failed to set up gmch\n");

		ret = -EIO;

		goto out_rmmap;

	}



	dev_priv->mm.gtt = intel_gtt_get();

	if (!dev_priv->mm.gtt) {

		DRM_ERROR("Failed to initialize GTT\n");

		ret = -ENODEV;

		goto out_rmmap;

		goto put_gmch;

	}



	aperture_size = dev_priv->mm.gtt->gtt_mappable_entries << PAGE_SHIFT;
@@ -1489,7 +1496,7 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags) 
				     aperture_size);

	if (dev_priv->mm.gtt_mapping == NULL) {

		ret = -EIO;

		goto out_rmmap;

		goto put_gmch;

	}



	i915_mtrr_setup(dev_priv, dev_priv->mm.gtt_base_addr,
@@ -1611,6 +1618,8 @@ out_mtrrfree: 
		dev_priv->mm.gtt_mtrr = -1;

	}

	io_mapping_free(dev_priv->mm.gtt_mapping);

put_gmch:

	intel_gmch_remove();

out_rmmap:

	pci_iounmap(dev->pdev, dev_priv->regs);

put_bridge:

include/drm/intel-gtt.h

+4 −0
Original line number Diff line number Diff line
@@ -23,6 +23,10 @@ const struct intel_gtt { 
	phys_addr_t gma_bus_addr;

} *intel_gtt_get(void);



int intel_gmch_probe(struct pci_dev *bridge_pdev, struct pci_dev *gpu_pdev,

		     struct agp_bridge_data *bridge);

void intel_gmch_remove(void);



void intel_gtt_chipset_flush(void);

void intel_gtt_unmap_memory(struct scatterlist *sg_list, int num_sg);

void intel_gtt_clear_range(unsigned int first_entry, unsigned int num_entries);

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