[Intel-gfx] [PATCH 08/12] drm/i915 + agp/intel-gtt: prep work for direct setup
Daniel Vetter
daniel.vetter at ffwll.ch
Thu Jun 7 15:56:00 CEST 2012
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
Signed-Off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
---
drivers/char/agp/intel-agp.c | 5 +++--
drivers/char/agp/intel-agp.h | 3 ---
drivers/char/agp/intel-gtt.c | 38 ++++++++++++++++++++++++++++++--------
drivers/gpu/drm/i915/i915_dma.c | 13 +++++++++++--
include/drm/intel-gtt.h | 4 ++++
5 files changed, 48 insertions(+), 15 deletions(-)
diff --git a/drivers/char/agp/intel-agp.c b/drivers/char/agp/intel-agp.c
index 764f70c..c98c568 100644
--- a/drivers/char/agp/intel-agp.c
+++ b/drivers/char/agp/intel-agp.c
@@ -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);
}
diff --git a/drivers/char/agp/intel-agp.h b/drivers/char/agp/intel-agp.h
index c009175..cf2e764 100644
--- a/drivers/char/agp/intel-agp.h
+++ b/drivers/char/agp/intel-agp.h
@@ -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
diff --git a/drivers/char/agp/intel-gtt.c b/drivers/char/agp/intel-gtt.c
index 5e6c89e..6499290 100644
--- a/drivers/char/agp/intel-gtt.c
+++ b/drivers/char/agp/intel-gtt.c
@@ -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,
- struct agp_bridge_data *bridge)
+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;
@@ -1542,12 +1561,12 @@ int intel_gmch_probe(struct pci_dev *pdev,
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)))
@@ -1577,8 +1596,11 @@ 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)
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index 0ab5d3d..29aee99 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -1486,11 +1486,18 @@ 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;
@@ -1501,7 +1508,7 @@ 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,
@@ -1623,6 +1630,8 @@ 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:
diff --git a/include/drm/intel-gtt.h b/include/drm/intel-gtt.h
index 8048c00..84ebd71 100644
--- a/include/drm/intel-gtt.h
+++ b/include/drm/intel-gtt.h
@@ -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);
--
1.7.7.6
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