Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=dc7a93190c21edbf3ed23e678ad04f852b9cff28
Commit:     dc7a93190c21edbf3ed23e678ad04f852b9cff28
Parent:     2f4042b186b9bfe82f48fe801619c6c285c16bef
Author:     Wang Zhenyu <[EMAIL PROTECTED]>
AuthorDate: Sun Jun 10 15:58:19 2007 +1000
Committer:  Dave Airlie <[EMAIL PROTECTED]>
CommitDate: Sun Jun 10 15:58:19 2007 +1000

    drm/i915:  Add support for the G33, Q33, and Q35 chipsets.
    
    These require that the status page be referenced by a pointer in GTT, rather
    than phsyical memory.  So, we have the X Server allocate that memory and 
tell
    us the address, instead.
    
    Signed-off-by: Dave Airlie <[EMAIL PROTECTED]>
---
 drivers/char/drm/drm_pciids.h |    3 +
 drivers/char/drm/i915_dma.c   |   87 +++++++++++++++++++++++++++++++++--------
 drivers/char/drm/i915_drm.h   |    5 ++
 drivers/char/drm/i915_drv.h   |    2 +
 4 files changed, 80 insertions(+), 17 deletions(-)

diff --git a/drivers/char/drm/drm_pciids.h b/drivers/char/drm/drm_pciids.h
index e908462..aa63350 100644
--- a/drivers/char/drm/drm_pciids.h
+++ b/drivers/char/drm/drm_pciids.h
@@ -305,6 +305,9 @@
        {0x8086, 0x2982, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, \
        {0x8086, 0x2992, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, \
        {0x8086, 0x29a2, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, \
+       {0x8086, 0x29b2, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, \
+       {0x8086, 0x29c2, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, \
+       {0x8086, 0x29d2, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, \
        {0x8086, 0x2a02, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, \
        {0x8086, 0x2a12, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, \
        {0, 0, 0}
diff --git a/drivers/char/drm/i915_dma.c b/drivers/char/drm/i915_dma.c
index 730dfee..ea52740 100644
--- a/drivers/char/drm/i915_dma.c
+++ b/drivers/char/drm/i915_dma.c
@@ -38,6 +38,10 @@
                       dev->pci_device == 0x2A02 || \
                       dev->pci_device == 0x2A12)
 
+#define IS_G33(dev) (dev->pci_device == 0x29b2 || \
+                    dev->pci_device == 0x29c2 || \
+                    dev->pci_device == 0x29d2)
+
 /* Really want an OS-independent resettable timer.  Would like to have
  * this loop run for (eg) 3 sec, but have the timer reset every time
  * the head pointer changes, so that EBUSY only happens if the ring
@@ -107,6 +111,12 @@ static int i915_dma_cleanup(drm_device_t * dev)
                        I915_WRITE(0x02080, 0x1ffff000);
                }
 
+               if (dev_priv->status_gfx_addr) {
+                       dev_priv->status_gfx_addr = 0;
+                       drm_core_ioremapfree(&dev_priv->hws_map, dev);
+                       I915_WRITE(0x2080, 0x1ffff000);
+               }
+
                drm_free(dev->dev_private, sizeof(drm_i915_private_t),
                         DRM_MEM_DRIVER);
 
@@ -180,26 +190,24 @@ static int i915_initialize(drm_device_t * dev,
        dev_priv->allow_batchbuffer = 1;
 
        /* Program Hardware Status Page */
-       dev_priv->status_page_dmah = drm_pci_alloc(dev, PAGE_SIZE, PAGE_SIZE,
-                                                  0xffffffff);
+       if (!IS_G33(dev)) {
+               dev_priv->status_page_dmah =
+                       drm_pci_alloc(dev, PAGE_SIZE, PAGE_SIZE, 0xffffffff);
+
+               if (!dev_priv->status_page_dmah) {
+                       dev->dev_private = (void *)dev_priv;
+                       i915_dma_cleanup(dev);
+                       DRM_ERROR("Can not allocate hardware status page\n");
+                       return DRM_ERR(ENOMEM);
+               }
+               dev_priv->hw_status_page = dev_priv->status_page_dmah->vaddr;
+               dev_priv->dma_status_page = dev_priv->status_page_dmah->busaddr;
 
-       if (!dev_priv->status_page_dmah) {
-               dev->dev_private = (void *)dev_priv;
-               i915_dma_cleanup(dev);
-               DRM_ERROR("Can not allocate hardware status page\n");
-               return DRM_ERR(ENOMEM);
+               memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
+               I915_WRITE(0x02080, dev_priv->dma_status_page);
        }
-       dev_priv->hw_status_page = dev_priv->status_page_dmah->vaddr;
-       dev_priv->dma_status_page = dev_priv->status_page_dmah->busaddr;
-
-       memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
-       DRM_DEBUG("hw status page @ %p\n", dev_priv->hw_status_page);
-
-       I915_WRITE(0x02080, dev_priv->dma_status_page);
        DRM_DEBUG("Enabled hardware status page\n");
-
        dev->dev_private = (void *)dev_priv;
-
        return 0;
 }
 
@@ -232,7 +240,10 @@ static int i915_dma_resume(drm_device_t * dev)
        }
        DRM_DEBUG("hw status page @ %p\n", dev_priv->hw_status_page);
 
-       I915_WRITE(0x02080, dev_priv->dma_status_page);
+       if (dev_priv->status_gfx_addr != 0)
+               I915_WRITE(0x02080, dev_priv->status_gfx_addr);
+       else
+               I915_WRITE(0x02080, dev_priv->dma_status_page);
        DRM_DEBUG("Enabled hardware status page\n");
 
        return 0;
@@ -740,6 +751,47 @@ static int i915_setparam(DRM_IOCTL_ARGS)
        return 0;
 }
 
+static int i915_set_status_page(DRM_IOCTL_ARGS)
+{
+       DRM_DEVICE;
+       drm_i915_private_t *dev_priv = dev->dev_private;
+       drm_i915_hws_addr_t hws;
+
+       if (!dev_priv) {
+               DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
+               return DRM_ERR(EINVAL);
+       }
+       DRM_COPY_FROM_USER_IOCTL(hws, (drm_i915_hws_addr_t __user *) data,
+                       sizeof(hws));
+       printk(KERN_DEBUG "set status page addr 0x%08x\n", (u32)hws.addr);
+
+       dev_priv->status_gfx_addr = hws.addr & (0x1ffff<<12);
+
+       dev_priv->hws_map.offset = dev->agp->agp_info.aper_base + hws.addr;
+       dev_priv->hws_map.size = 4*1024;
+       dev_priv->hws_map.type = 0;
+       dev_priv->hws_map.flags = 0;
+       dev_priv->hws_map.mtrr = 0;
+
+       drm_core_ioremap(&dev_priv->hws_map, dev);
+       if (dev_priv->hws_map.handle == NULL) {
+               dev->dev_private = (void *)dev_priv;
+               i915_dma_cleanup(dev);
+               dev_priv->status_gfx_addr = 0;
+               DRM_ERROR("can not ioremap virtual address for"
+                               " G33 hw status page\n");
+               return DRM_ERR(ENOMEM);
+       }
+       dev_priv->hw_status_page = dev_priv->hws_map.handle;
+
+       memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
+       I915_WRITE(0x02080, dev_priv->status_gfx_addr);
+       DRM_DEBUG("load hws 0x2080 with gfx mem 0x%x\n",
+                       dev_priv->status_gfx_addr);
+       DRM_DEBUG("load hws at %p\n", dev_priv->hw_status_page);
+       return 0;
+}
+
 int i915_driver_load(drm_device_t *dev, unsigned long flags)
 {
        /* i915 has 4 more counters */
@@ -786,6 +838,7 @@ drm_ioctl_desc_t i915_ioctls[] = {
        [DRM_IOCTL_NR(DRM_I915_SET_VBLANK_PIPE)] = { i915_vblank_pipe_set, 
DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY },
        [DRM_IOCTL_NR(DRM_I915_GET_VBLANK_PIPE)] = { i915_vblank_pipe_get, 
DRM_AUTH },
        [DRM_IOCTL_NR(DRM_I915_VBLANK_SWAP)] = {i915_vblank_swap, DRM_AUTH},
+       [DRM_IOCTL_NR(DRM_I915_HWS_ADDR)] = {i915_set_status_page, DRM_AUTH},
 };
 
 int i915_max_ioctl = DRM_ARRAY_SIZE(i915_ioctls);
diff --git a/drivers/char/drm/i915_drm.h b/drivers/char/drm/i915_drm.h
index 96a4688..7b7b68b 100644
--- a/drivers/char/drm/i915_drm.h
+++ b/drivers/char/drm/i915_drm.h
@@ -142,6 +142,7 @@ typedef struct _drm_i915_sarea {
 #define DRM_I915_SET_VBLANK_PIPE       0x0d
 #define DRM_I915_GET_VBLANK_PIPE       0x0e
 #define DRM_I915_VBLANK_SWAP   0x0f
+#define DRM_I915_HWS_ADDR      0x11
 
 #define DRM_IOCTL_I915_INIT            DRM_IOW( DRM_COMMAND_BASE + 
DRM_I915_INIT, drm_i915_init_t)
 #define DRM_IOCTL_I915_FLUSH           DRM_IO ( DRM_COMMAND_BASE + 
DRM_I915_FLUSH)
@@ -262,4 +263,8 @@ typedef struct drm_i915_vblank_swap {
        unsigned int sequence;
 } drm_i915_vblank_swap_t;
 
+typedef struct drm_i915_hws_addr {
+       uint64_t addr;
+} drm_i915_hws_addr_t;
+
 #endif                         /* _I915_DRM_H_ */
diff --git a/drivers/char/drm/i915_drv.h b/drivers/char/drm/i915_drv.h
index 93cdcfe..85e323a 100644
--- a/drivers/char/drm/i915_drv.h
+++ b/drivers/char/drm/i915_drv.h
@@ -91,6 +91,8 @@ typedef struct drm_i915_private {
        void *hw_status_page;
        dma_addr_t dma_status_page;
        unsigned long counter;
+       unsigned int status_gfx_addr;
+       drm_local_map_t hws_map;
 
        unsigned int cpp;
        int back_offset;
-
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