vserver 1.9.3
[linux-2.6.git] / drivers / char / agp / intel-agp.c
index 256ac1a..7bec505 100644 (file)
@@ -5,11 +5,15 @@
 /*
  * Intel(R) 855GM/852GM and 865G support added by David Dawes
  * <dawes@tungstengraphics.com>.
+ *
+ * Intel(R) 915G support added by Alan Hourihane
+ * <alanh@tungstengraphics.com>.
  */
 
 #include <linux/module.h>
 #include <linux/pci.h>
 #include <linux/init.h>
+#include <linux/pagemap.h>
 #include <linux/agp_backend.h>
 #include "agp.h"
 
 #define INTEL_I850_MCHCFG      0x50
 #define INTEL_I850_ERRSTS      0xc8
 
+/* intel 915G registers */
+#define I915_GMADDR    0x18
+#define I915_MMADDR    0x10
+#define I915_PTEADDR   0x1C
+#define I915_GMCH_GMS_STOLEN_48M       (0x6 << 4)
+#define I915_GMCH_GMS_STOLEN_64M       (0x7 << 4)
+
+
 /* Intel 7505 registers */
 #define INTEL_I7505_APSIZE     0x74
 #define INTEL_I7505_NCAPID     0x60
@@ -57,7 +69,7 @@ static struct gatt_mask intel_i810_masks[] =
 
 static struct _intel_i810_private {
        struct pci_dev *i810_dev;       /* device one */
-       volatile u8 *registers;
+       volatile u8 __iomem *registers;
        int num_dcache_entries;
 } intel_i810_private;
 
@@ -99,7 +111,7 @@ static int intel_i810_configure(void)
        pci_read_config_dword(intel_i810_private.i810_dev, I810_MMADDR, &temp);
        temp &= 0xfff80000;
 
-       intel_i810_private.registers = (volatile u8 *) ioremap(temp, 128 * 4096);
+       intel_i810_private.registers = ioremap(temp, 128 * 4096);
        if (!intel_i810_private.registers) {
                printk(KERN_ERR PFX "Unable to remap memory.\n");
                return -ENOMEM;
@@ -130,7 +142,7 @@ static int intel_i810_configure(void)
 static void intel_i810_cleanup(void)
 {
        OUTREG32(intel_i810_private.registers, I810_PGETBL_CTL, 0);
-       iounmap((void *) intel_i810_private.registers);
+       iounmap(intel_i810_private.registers);
 }
 
 static void intel_i810_tlbflush(struct agp_memory *mem)
@@ -143,6 +155,40 @@ static void intel_i810_agp_enable(u32 mode)
        return;
 }
 
+/* Exists to support ARGB cursors */
+static void *i8xx_alloc_pages(void)
+{
+       struct page * page;
+
+       page = alloc_pages(GFP_KERNEL, 2);
+       if (page == NULL) {
+               return NULL;
+       }
+       if (change_page_attr(page, 4, PAGE_KERNEL_NOCACHE) < 0) {
+               __free_page(page);
+               return NULL;
+       }
+       get_page(page);
+       SetPageLocked(page);
+       atomic_inc(&agp_bridge->current_memory_agp);
+       return page_address(page);
+}
+
+static void i8xx_destroy_pages(void *addr)
+{
+       struct page *page;
+
+       if (addr == NULL)
+               return;
+
+       page = virt_to_page(addr);
+       change_page_attr(page, 4, PAGE_KERNEL);
+       put_page(page);
+       unlock_page(page);
+       free_pages((unsigned long)addr, 2);
+       atomic_dec(&agp_bridge->current_memory_agp);
+}
+
 static int intel_i810_insert_entries(struct agp_memory *mem, off_t pg_start,
                                int type)
 {
@@ -156,7 +202,7 @@ static int intel_i810_insert_entries(struct agp_memory *mem, off_t pg_start,
                return -EINVAL;
        }
        for (j = pg_start; j < (pg_start + mem->page_count); j++) {
-               if (!PGE_EMPTY(agp_bridge, agp_bridge->gatt_table[j]))
+               if (!PGE_EMPTY(agp_bridge, readl(agp_bridge->gatt_table+j)))
                        return -EBUSY;
        }
 
@@ -218,20 +264,36 @@ static struct agp_memory *alloc_agpphysmem_i8xx(size_t pg_count, int type)
        struct agp_memory *new;
        void *addr;
 
-       if (pg_count != 1)
+       if (pg_count != 1 && pg_count != 4)
                return NULL;
 
-       addr = agp_bridge->driver->agp_alloc_page();
+       switch (pg_count) {
+       case 1: addr = agp_bridge->driver->agp_alloc_page();
+               break;
+       case 4:
+               /* kludge to get 4 physical pages for ARGB cursor */
+               addr = i8xx_alloc_pages();
+               break;
+       default:
+               return NULL;
+       }
+
        if (addr == NULL)
                return NULL;
 
-       new = agp_create_memory(1);
+       new = agp_create_memory(pg_count);
        if (new == NULL)
                return NULL;
 
-       new->memory[0] = agp_bridge->driver->mask_memory(virt_to_phys(addr), type);
-       new->page_count = 1;
-       new->num_scratch_pages = 1;
+       new->memory[0] = virt_to_phys(addr);
+       if (pg_count == 4) {
+               /* kludge to get 4 physical pages for ARGB cursor */
+               new->memory[1] = new->memory[0] + PAGE_SIZE;
+               new->memory[2] = new->memory[1] + PAGE_SIZE;
+               new->memory[3] = new->memory[2] + PAGE_SIZE;
+       }
+       new->page_count = pg_count;
+       new->num_scratch_pages = pg_count;
        new->type = AGP_PHYS_MEMORY;
        new->physical = new->memory[0];
        return new;
@@ -265,7 +327,11 @@ static void intel_i810_free_by_type(struct agp_memory *curr)
 {
        agp_free_key(curr->key);
        if(curr->type == AGP_PHYS_MEMORY) {
-               agp_bridge->driver->agp_destroy_page(phys_to_virt(curr->memory[0]));
+               if (curr->page_count == 4)
+                       i8xx_destroy_pages(phys_to_virt(curr->memory[0]));
+               else
+                       agp_bridge->driver->agp_destroy_page(
+                                phys_to_virt(curr->memory[0]));
                vfree(curr->memory);
        }
        kfree(curr);
@@ -281,12 +347,14 @@ static struct aper_size_info_fixed intel_i830_sizes[] =
 {
        {128, 32768, 5},
        /* The 64M mode still requires a 128k gatt */
-       {64, 16384, 5}
+       {64, 16384, 5},
+       {256, 65536, 6},
 };
 
 static struct _intel_i830_private {
        struct pci_dev *i830_dev;               /* device one */
-       volatile u8 *registers;
+       volatile u8 __iomem *registers;
+       volatile u32 __iomem *gtt;              /* I915G */
        int gtt_entries;
 } intel_i830_private;
 
@@ -297,20 +365,26 @@ static void intel_i830_init_gtt_entries(void)
        u8 rdct;
        int local = 0;
        static const int ddt[4] = { 0, 16, 32, 64 };
+       int size;
 
        pci_read_config_word(agp_bridge->dev,I830_GMCH_CTRL,&gmch_ctrl);
 
+       /* We obtain the size of the GTT, which is also stored (for some
+        * reason) at the top of stolen memory. Then we add 4KB to that
+        * for the video BIOS popup, which is also stored in there. */
+       size = agp_bridge->driver->fetch_size() + 4;
+
        if (agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_82830_HB ||
            agp_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(132);
+                       gtt_entries = KB(512) - KB(size);
                        break;
                case I830_GMCH_GMS_STOLEN_1024:
-                       gtt_entries = MB(1) - KB(132);
+                       gtt_entries = MB(1) - KB(size);
                        break;
                case I830_GMCH_GMS_STOLEN_8192:
-                       gtt_entries = MB(8) - KB(132);
+                       gtt_entries = MB(8) - KB(size);
                        break;
                case I830_GMCH_GMS_LOCAL:
                        rdct = INREG8(intel_i830_private.registers,
@@ -326,20 +400,33 @@ static void intel_i830_init_gtt_entries(void)
        } else {
                switch (gmch_ctrl & I830_GMCH_GMS_MASK) {
                case I855_GMCH_GMS_STOLEN_1M:
-                       gtt_entries = MB(1) - KB(132);
+                       gtt_entries = MB(1) - KB(size);
                        break;
                case I855_GMCH_GMS_STOLEN_4M:
-                       gtt_entries = MB(4) - KB(132);
+                       gtt_entries = MB(4) - KB(size);
                        break;
                case I855_GMCH_GMS_STOLEN_8M:
-                       gtt_entries = MB(8) - KB(132);
+                       gtt_entries = MB(8) - KB(size);
                        break;
                case I855_GMCH_GMS_STOLEN_16M:
-                       gtt_entries = MB(16) - KB(132);
+                       gtt_entries = MB(16) - KB(size);
                        break;
                case I855_GMCH_GMS_STOLEN_32M:
-                       gtt_entries = MB(32) - KB(132);
+                       gtt_entries = MB(32) - KB(size);
+                       break;
+               case I915_GMCH_GMS_STOLEN_48M:
+                       /* Check it's really I915G */
+                       if (agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_82915G_HB)
+                               gtt_entries = MB(48) - KB(size);
+                       else
+                               gtt_entries = 0;
                        break;
+               case I915_GMCH_GMS_STOLEN_64M:
+                       /* Check it's really I915G */
+                       if (agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_82915G_HB)
+                               gtt_entries = MB(64) - KB(size);
+                       else
+                               gtt_entries = 0;
                default:
                        gtt_entries = 0;
                        break;
@@ -369,12 +456,12 @@ static int intel_i830_create_gatt_table(void)
        size = agp_bridge->current_size;
        page_order = size->page_order;
        num_entries = size->num_entries;
-       agp_bridge->gatt_table_real = 0;
+       agp_bridge->gatt_table_real = NULL;
 
        pci_read_config_dword(intel_i830_private.i830_dev,I810_MMADDR,&temp);
        temp &= 0xfff80000;
 
-       intel_i830_private.registers = (volatile u8 *) ioremap(temp,128 * 4096);
+       intel_i830_private.registers = ioremap(temp,128 * 4096);
        if (!intel_i830_private.registers)
                return (-ENOMEM);
 
@@ -421,7 +508,7 @@ static int intel_i830_fetch_size(void)
                agp_bridge->aperture_size_idx = 0;
                return(values[0].size);
        } else {
-               agp_bridge->previous_size = agp_bridge->current_size = (void *) values;
+               agp_bridge->previous_size = agp_bridge->current_size = (void *) (values + 1);
                agp_bridge->aperture_size_idx = 1;
                return(values[1].size);
        }
@@ -457,7 +544,7 @@ static int intel_i830_configure(void)
 
 static void intel_i830_cleanup(void)
 {
-       iounmap((void *) intel_i830_private.registers);
+       iounmap(intel_i830_private.registers);
 }
 
 static int intel_i830_insert_entries(struct agp_memory *mem,off_t pg_start,
@@ -532,6 +619,161 @@ static struct agp_memory *intel_i830_alloc_by_type(size_t pg_count,int type)
        return(NULL);
 }
 
+static int intel_i915_configure(void)
+{
+       struct aper_size_info_fixed *current_size;
+       u32 temp;
+       u16 gmch_ctrl;
+       int i;
+
+       current_size = A_SIZE_FIX(agp_bridge->current_size);
+
+       pci_read_config_dword(intel_i830_private.i830_dev, I915_GMADDR, &temp);
+
+       agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
+
+       pci_read_config_word(agp_bridge->dev,I830_GMCH_CTRL,&gmch_ctrl);
+       gmch_ctrl |= I830_GMCH_ENABLED;
+       pci_write_config_word(agp_bridge->dev,I830_GMCH_CTRL,gmch_ctrl);
+
+       OUTREG32(intel_i830_private.registers,I810_PGETBL_CTL,agp_bridge->gatt_bus_addr | I810_PGETBL_ENABLED);
+       global_cache_flush();
+
+       if (agp_bridge->driver->needs_scratch_page) {
+               for (i = intel_i830_private.gtt_entries; i < current_size->num_entries; i++)
+                       OUTREG32(intel_i830_private.gtt, i, agp_bridge->scratch_page);
+       }
+
+       return (0);
+}
+
+static void intel_i915_cleanup(void)
+{
+       iounmap(intel_i830_private.gtt);
+       iounmap(intel_i830_private.registers);
+}
+
+static int intel_i915_insert_entries(struct agp_memory *mem,off_t pg_start,
+                               int type)
+{
+       int i,j,num_entries;
+       void *temp;
+
+       temp = agp_bridge->current_size;
+       num_entries = A_SIZE_FIX(temp)->num_entries;
+
+       if (pg_start < intel_i830_private.gtt_entries) {
+               printk (KERN_DEBUG PFX "pg_start == 0x%.8lx,intel_i830_private.gtt_entries == 0x%.8x\n",
+                               pg_start,intel_i830_private.gtt_entries);
+
+               printk (KERN_INFO PFX "Trying to insert into local/stolen memory\n");
+               return (-EINVAL);
+       }
+
+       if ((pg_start + mem->page_count) > num_entries)
+               return (-EINVAL);
+
+       /* The i830 can't check the GTT for entries since its read only,
+        * depend on the caller to make the correct offset decisions.
+        */
+
+       if ((type != 0 && type != AGP_PHYS_MEMORY) ||
+               (mem->type != 0 && mem->type != AGP_PHYS_MEMORY))
+               return (-EINVAL);
+
+       global_cache_flush();
+
+       for (i = 0, j = pg_start; i < mem->page_count; i++, j++)
+               OUTREG32(intel_i830_private.gtt, j, agp_bridge->driver->mask_memory(mem->memory[i], mem->type));
+
+       global_cache_flush();
+
+       agp_bridge->driver->tlb_flush(mem);
+
+       return(0);
+}
+
+static int intel_i915_remove_entries(struct agp_memory *mem,off_t pg_start,
+                               int type)
+{
+       int i;
+
+       global_cache_flush();
+
+       if (pg_start < intel_i830_private.gtt_entries) {
+               printk (KERN_INFO PFX "Trying to disable local/stolen memory\n");
+               return (-EINVAL);
+       }
+
+       for (i = pg_start; i < (mem->page_count + pg_start); i++)
+               OUTREG32(intel_i830_private.gtt, i, agp_bridge->scratch_page);
+
+       global_cache_flush();
+
+       agp_bridge->driver->tlb_flush(mem);
+
+       return (0);
+}
+
+static int intel_i915_fetch_size(void)
+{
+       struct aper_size_info_fixed *values;
+       u32 temp, offset = 0;
+
+#define I915_256MB_ADDRESS_MASK (1<<27)
+
+       values = A_SIZE_FIX(agp_bridge->driver->aperture_sizes);
+
+       pci_read_config_dword(intel_i830_private.i830_dev, I915_GMADDR, &temp);
+       if (temp & I915_256MB_ADDRESS_MASK)
+               offset = 0;     /* 128MB aperture */
+       else
+               offset = 2;     /* 256MB aperture */
+       agp_bridge->previous_size = agp_bridge->current_size = (void *)(values + offset);
+       return(values[offset].size);
+}
+
+/* The intel i915 automatically initializes the agp aperture during POST.
+ * Use the memory already set aside for in the GTT.
+ */
+static int intel_i915_create_gatt_table(void)
+{
+       int page_order;
+       struct aper_size_info_fixed *size;
+       int num_entries;
+       u32 temp, temp2;
+
+       size = agp_bridge->current_size;
+       page_order = size->page_order;
+       num_entries = size->num_entries;
+       agp_bridge->gatt_table_real = NULL;
+
+       pci_read_config_dword(intel_i830_private.i830_dev, I915_MMADDR, &temp);
+       pci_read_config_dword(intel_i830_private.i830_dev, I915_PTEADDR,&temp2);
+
+       intel_i830_private.gtt = ioremap(temp2, 256 * 1024);
+       if (!intel_i830_private.gtt)
+               return (-ENOMEM);
+
+       temp &= 0xfff80000;
+
+       intel_i830_private.registers = ioremap(temp,128 * 4096);
+       if (!intel_i830_private.registers)
+               return (-ENOMEM);
+
+       temp = INREG32(intel_i830_private.registers,I810_PGETBL_CTL) & 0xfffff000;
+       global_cache_flush();
+
+       /* we have to call this as early as possible after the MMIO base address is known */
+       intel_i830_init_gtt_entries();
+
+       agp_bridge->gatt_table = NULL;
+
+       agp_bridge->gatt_bus_addr = temp;
+
+       return(0);
+}
+
 static int intel_fetch_size(void)
 {
        int i;
@@ -679,7 +921,7 @@ static int intel_815_configure(void)
 
        /* aperture size */
        pci_write_config_byte(agp_bridge->dev, INTEL_APSIZE,
-                       current_size->size_value); 
+                       current_size->size_value);
 
        /* address to map to */
        pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
@@ -691,7 +933,7 @@ static int intel_815_configure(void)
        pci_write_config_dword(agp_bridge->dev, INTEL_ATTBASE, addr);
 
        /* agpctrl */
-       pci_write_config_dword(agp_bridge->dev, INTEL_AGPCTRL, 0x0000); 
+       pci_write_config_dword(agp_bridge->dev, INTEL_AGPCTRL, 0x0000);
 
        /* apcont */
        pci_read_config_byte(agp_bridge->dev, INTEL_815_APCONT, &temp2);
@@ -714,7 +956,7 @@ static void intel_820_cleanup(void)
 
        previous_size = A_SIZE_8(agp_bridge->previous_size);
        pci_read_config_byte(agp_bridge->dev, INTEL_I820_RDCR, &temp);
-       pci_write_config_byte(agp_bridge->dev, INTEL_I820_RDCR, 
+       pci_write_config_byte(agp_bridge->dev, INTEL_I820_RDCR,
                        temp & ~(1 << 1));
        pci_write_config_byte(agp_bridge->dev, INTEL_APSIZE,
                        previous_size->size_value);
@@ -724,23 +966,23 @@ static void intel_820_cleanup(void)
 static int intel_820_configure(void)
 {
        u32 temp;
-       u8 temp2; 
+       u8 temp2;
        struct aper_size_info_8 *current_size;
 
        current_size = A_SIZE_8(agp_bridge->current_size);
 
        /* aperture size */
-       pci_write_config_byte(agp_bridge->dev, INTEL_APSIZE, current_size->size_value); 
+       pci_write_config_byte(agp_bridge->dev, INTEL_APSIZE, current_size->size_value);
 
        /* address to map to */
        pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
        agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
 
        /* attbase - aperture base */
-       pci_write_config_dword(agp_bridge->dev, INTEL_ATTBASE, agp_bridge->gatt_bus_addr); 
+       pci_write_config_dword(agp_bridge->dev, INTEL_ATTBASE, agp_bridge->gatt_bus_addr);
 
        /* agpctrl */
-       pci_write_config_dword(agp_bridge->dev, INTEL_AGPCTRL, 0x0000); 
+       pci_write_config_dword(agp_bridge->dev, INTEL_AGPCTRL, 0x0000);
 
        /* global enable aperture access */
        /* This flag is not accessed through MCHCFG register as in */
@@ -748,7 +990,7 @@ static int intel_820_configure(void)
        pci_read_config_byte(agp_bridge->dev, INTEL_I820_RDCR, &temp2);
        pci_write_config_byte(agp_bridge->dev, INTEL_I820_RDCR, temp2 | (1 << 1));
        /* clear any possible AGP-related error conditions */
-       pci_write_config_word(agp_bridge->dev, INTEL_I820_ERRSTS, 0x001c); 
+       pci_write_config_word(agp_bridge->dev, INTEL_I820_ERRSTS, 0x001c);
        return 0;
 }
 
@@ -761,23 +1003,23 @@ static int intel_840_configure(void)
        current_size = A_SIZE_8(agp_bridge->current_size);
 
        /* aperture size */
-       pci_write_config_byte(agp_bridge->dev, INTEL_APSIZE, current_size->size_value); 
+       pci_write_config_byte(agp_bridge->dev, INTEL_APSIZE, current_size->size_value);
 
        /* address to map to */
        pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
        agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
 
        /* attbase - aperture base */
-       pci_write_config_dword(agp_bridge->dev, INTEL_ATTBASE, agp_bridge->gatt_bus_addr); 
+       pci_write_config_dword(agp_bridge->dev, INTEL_ATTBASE, agp_bridge->gatt_bus_addr);
 
        /* agpctrl */
-       pci_write_config_dword(agp_bridge->dev, INTEL_AGPCTRL, 0x0000); 
+       pci_write_config_dword(agp_bridge->dev, INTEL_AGPCTRL, 0x0000);
 
        /* mcgcfg */
        pci_read_config_word(agp_bridge->dev, INTEL_I840_MCHCFG, &temp2);
        pci_write_config_word(agp_bridge->dev, INTEL_I840_MCHCFG, temp2 | (1 << 9));
        /* clear any possible error conditions */
-       pci_write_config_word(agp_bridge->dev, INTEL_I840_ERRSTS, 0xc000); 
+       pci_write_config_word(agp_bridge->dev, INTEL_I840_ERRSTS, 0xc000);
        return 0;
 }
 
@@ -790,23 +1032,23 @@ static int intel_845_configure(void)
        current_size = A_SIZE_8(agp_bridge->current_size);
 
        /* aperture size */
-       pci_write_config_byte(agp_bridge->dev, INTEL_APSIZE, current_size->size_value); 
+       pci_write_config_byte(agp_bridge->dev, INTEL_APSIZE, current_size->size_value);
 
        /* address to map to */
        pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
        agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
 
        /* attbase - aperture base */
-       pci_write_config_dword(agp_bridge->dev, INTEL_ATTBASE, agp_bridge->gatt_bus_addr); 
+       pci_write_config_dword(agp_bridge->dev, INTEL_ATTBASE, agp_bridge->gatt_bus_addr);
 
        /* agpctrl */
-       pci_write_config_dword(agp_bridge->dev, INTEL_AGPCTRL, 0x0000); 
+       pci_write_config_dword(agp_bridge->dev, INTEL_AGPCTRL, 0x0000);
 
        /* agpm */
        pci_read_config_byte(agp_bridge->dev, INTEL_I845_AGPM, &temp2);
        pci_write_config_byte(agp_bridge->dev, INTEL_I845_AGPM, temp2 | (1 << 1));
        /* clear any possible error conditions */
-       pci_write_config_word(agp_bridge->dev, INTEL_I845_ERRSTS, 0x001c); 
+       pci_write_config_word(agp_bridge->dev, INTEL_I845_ERRSTS, 0x001c);
        return 0;
 }
 
@@ -819,23 +1061,23 @@ static int intel_850_configure(void)
        current_size = A_SIZE_8(agp_bridge->current_size);
 
        /* aperture size */
-       pci_write_config_byte(agp_bridge->dev, INTEL_APSIZE, current_size->size_value); 
+       pci_write_config_byte(agp_bridge->dev, INTEL_APSIZE, current_size->size_value);
 
        /* address to map to */
        pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
        agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
 
        /* attbase - aperture base */
-       pci_write_config_dword(agp_bridge->dev, INTEL_ATTBASE, agp_bridge->gatt_bus_addr); 
+       pci_write_config_dword(agp_bridge->dev, INTEL_ATTBASE, agp_bridge->gatt_bus_addr);
 
        /* agpctrl */
-       pci_write_config_dword(agp_bridge->dev, INTEL_AGPCTRL, 0x0000); 
+       pci_write_config_dword(agp_bridge->dev, INTEL_AGPCTRL, 0x0000);
 
        /* mcgcfg */
        pci_read_config_word(agp_bridge->dev, INTEL_I850_MCHCFG, &temp2);
        pci_write_config_word(agp_bridge->dev, INTEL_I850_MCHCFG, temp2 | (1 << 9));
        /* clear any possible AGP-related error conditions */
-       pci_write_config_word(agp_bridge->dev, INTEL_I850_ERRSTS, 0x001c); 
+       pci_write_config_word(agp_bridge->dev, INTEL_I850_ERRSTS, 0x001c);
        return 0;
 }
 
@@ -921,7 +1163,7 @@ static int intel_7505_configure(void)
        /* mchcfg */
        pci_read_config_word(agp_bridge->dev, INTEL_I7505_MCHCFG, &temp2);
        pci_write_config_word(agp_bridge->dev, INTEL_I7505_MCHCFG, temp2 | (1 << 9));
-       
+
        return 0;
 }
 
@@ -936,7 +1178,7 @@ static struct aper_size_info_8 intel_815_sizes[2] =
        {64, 16384, 4, 0},
        {32, 8192, 3, 8},
 };
-       
+
 static struct aper_size_info_8 intel_8xx_sizes[7] =
 {
        {256, 65536, 6, 0},
@@ -959,7 +1201,7 @@ static struct aper_size_info_16 intel_generic_sizes[7] =
        {4, 1024, 0, 63}
 };
 
-static struct aper_size_info_8 intel_830mp_sizes[4] = 
+static struct aper_size_info_8 intel_830mp_sizes[4] =
 {
        {256, 65536, 6, 0},
        {128, 32768, 5, 32},
@@ -1041,7 +1283,7 @@ static struct agp_bridge_driver intel_830_driver = {
        .owner                  = THIS_MODULE,
        .aperture_sizes         = intel_i830_sizes,
        .size_type              = FIXED_APER_SIZE,
-       .num_aperture_sizes     = 2,
+       .num_aperture_sizes     = 3,
        .needs_scratch_page     = TRUE,
        .configure              = intel_i830_configure,
        .fetch_size             = intel_i830_fetch_size,
@@ -1199,6 +1441,31 @@ static struct agp_bridge_driver intel_860_driver = {
        .agp_destroy_page       = agp_generic_destroy_page,
 };
 
+static struct agp_bridge_driver intel_915_driver = {
+       .owner                  = THIS_MODULE,
+       .aperture_sizes         = intel_i830_sizes,
+       .size_type              = FIXED_APER_SIZE,
+       .num_aperture_sizes     = 3,
+       .needs_scratch_page     = TRUE,
+       .configure              = intel_i915_configure,
+       .fetch_size             = intel_i915_fetch_size,
+       .cleanup                = intel_i915_cleanup,
+       .tlb_flush              = intel_i810_tlbflush,
+       .mask_memory            = intel_i810_mask_memory,
+       .masks                  = intel_i810_masks,
+       .agp_enable             = intel_i810_agp_enable,
+       .cache_flush            = global_cache_flush,
+       .create_gatt_table      = intel_i915_create_gatt_table,
+       .free_gatt_table        = intel_i830_free_gatt_table,
+       .insert_memory          = intel_i915_insert_entries,
+       .remove_memory          = intel_i915_remove_entries,
+       .alloc_by_type          = intel_i830_alloc_by_type,
+       .free_by_type           = intel_i810_free_by_type,
+       .agp_alloc_page         = agp_generic_alloc_page,
+       .agp_destroy_page       = agp_generic_destroy_page,
+};
+
+
 static struct agp_bridge_driver intel_7505_driver = {
        .owner                  = THIS_MODULE,
        .aperture_sizes         = intel_8xx_sizes,
@@ -1222,18 +1489,13 @@ static struct agp_bridge_driver intel_7505_driver = {
        .agp_destroy_page       = agp_generic_destroy_page,
 };
 
-static int find_i810(u16 device, const char *name)
+static int find_i810(u16 device)
 {
        struct pci_dev *i810_dev;
 
        i810_dev = pci_find_device(PCI_VENDOR_ID_INTEL, device, NULL);
-       if (!i810_dev) {
-               printk(KERN_ERR PFX "Detected an Intel %s Chipset, "
-                               "but could not find the secondary device.\n",
-                               name);
+       if (!i810_dev)
                return 0;
-       }
-       
        intel_i810_private.i810_dev = i810_dev;
        return 1;
 }
@@ -1283,29 +1545,29 @@ static int __devinit agp_intel_probe(struct pci_dev *pdev,
                name = "440GX";
                break;
        case PCI_DEVICE_ID_INTEL_82810_MC1:
-               if (!find_i810(PCI_DEVICE_ID_INTEL_82810_IG1, "i810"))
+               name = "i810";
+               if (!find_i810(PCI_DEVICE_ID_INTEL_82810_IG1))
                        goto fail;
                bridge->driver = &intel_810_driver;
-               name = "i810";
                break;
        case PCI_DEVICE_ID_INTEL_82810_MC3:
-               if (!find_i810(PCI_DEVICE_ID_INTEL_82810_IG3, "i810 DC100"))
+               name = "i810 DC100";
+               if (!find_i810(PCI_DEVICE_ID_INTEL_82810_IG3))
                        goto fail;
                bridge->driver = &intel_810_driver;
-               name = "i810 DC100";
                break;
        case PCI_DEVICE_ID_INTEL_82810E_MC:
-               if (!find_i810(PCI_DEVICE_ID_INTEL_82810E_IG, "i810 E"))
+               name = "i810 E";
+               if (!find_i810(PCI_DEVICE_ID_INTEL_82810E_IG))
                        goto fail;
                bridge->driver = &intel_810_driver;
-               name = "i810 E";
                break;
         case PCI_DEVICE_ID_INTEL_82815_MC:
                /*
                 * The i815 can operate either as an i810 style
                 * integrated device, or as an AGP4X motherboard.
                 */
-               if (find_i810(PCI_DEVICE_ID_INTEL_82815_CGC, "i815"))
+               if (find_i810(PCI_DEVICE_ID_INTEL_82815_CGC))
                        bridge->driver = &intel_810_driver;
                else
                        bridge->driver = &intel_815_driver;
@@ -1373,17 +1635,27 @@ static int __devinit agp_intel_probe(struct pci_dev *pdev,
                bridge->driver = &intel_845_driver;
                name = "i875";
                break;
+       case PCI_DEVICE_ID_INTEL_82915G_HB:
+               if (find_i830(PCI_DEVICE_ID_INTEL_82915G_IG)) {
+                       bridge->driver = &intel_915_driver;
+               } else {
+                       bridge->driver = &intel_845_driver;
+               }
+               name = "915G";
+               break;
        case PCI_DEVICE_ID_INTEL_7505_0:
                bridge->driver = &intel_7505_driver;
-               name =  "E7505";
+               name = "E7505";
                break;
        case PCI_DEVICE_ID_INTEL_7205_0:
                bridge->driver = &intel_7505_driver;
                name = "E7205";
                break;
        default:
-               printk(KERN_ERR PFX "Unsupported Intel chipset (device id: %04x)\n",
+               if (cap_ptr)
+                       printk(KERN_WARNING PFX "Unsupported Intel chipset (device id: %04x)\n",
                            pdev->device);
+               agp_put_bridge(bridge);
                return -ENODEV;
        };
 
@@ -1406,7 +1678,8 @@ static int __devinit agp_intel_probe(struct pci_dev *pdev,
        if (!r->start && r->end) {
                if(pci_assign_resource(pdev, 0)) {
                        printk(KERN_ERR PFX "could not assign resource 0\n");
-                       return (-ENODEV);
+                       agp_put_bridge(bridge);
+                       return -ENODEV;
                }
        }
 
@@ -1417,7 +1690,8 @@ static int __devinit agp_intel_probe(struct pci_dev *pdev,
        */
        if (pci_enable_device(pdev)) {
                printk(KERN_ERR PFX "Unable to Enable PCI device\n");
-               return (-ENODEV);
+               agp_put_bridge(bridge);
+               return -ENODEV;
        }
 
        /* Fill in the mode register */
@@ -1429,7 +1703,10 @@ static int __devinit agp_intel_probe(struct pci_dev *pdev,
 
        pci_set_drvdata(pdev, bridge);
        return agp_add_bridge(bridge);
- fail:
+
+fail:
+       printk(KERN_ERR PFX "Detected an Intel %s chipset, "
+               "but could not find the secondary device.\n", name);
        agp_put_bridge(bridge);
        return -ENODEV;
 }
@@ -1442,34 +1719,56 @@ static void __devexit agp_intel_remove(struct pci_dev *pdev)
        agp_put_bridge(bridge);
 }
 
-static int agp_intel_suspend(struct pci_dev *dev, u32 state)
-{
-       return 0;
-}
-
 static int agp_intel_resume(struct pci_dev *pdev)
 {
        struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
 
+       pci_restore_state(pdev, pdev->saved_config_space);
+
        if (bridge->driver == &intel_generic_driver)
                intel_configure();
        else if (bridge->driver == &intel_845_driver)
                intel_845_configure();
        else if (bridge->driver == &intel_830mp_driver)
                intel_830mp_configure();
+       else if (bridge->driver == &intel_915_driver)
+               intel_i915_configure();
 
        return 0;
 }
 
 static struct pci_device_id agp_intel_pci_table[] = {
-       {
-       .class          = (PCI_CLASS_BRIDGE_HOST << 8),
-       .class_mask     = ~0,
-       .vendor         = PCI_VENDOR_ID_INTEL,
-       .device         = PCI_ANY_ID,
-       .subvendor      = PCI_ANY_ID,
-       .subdevice      = PCI_ANY_ID,
-       },
+#define ID(x)                                          \
+       {                                               \
+       .class          = (PCI_CLASS_BRIDGE_HOST << 8), \
+       .class_mask     = ~0,                           \
+       .vendor         = PCI_VENDOR_ID_INTEL,          \
+       .device         = x,                            \
+       .subvendor      = PCI_ANY_ID,                   \
+       .subdevice      = PCI_ANY_ID,                   \
+       }
+       ID(PCI_DEVICE_ID_INTEL_82443LX_0),
+       ID(PCI_DEVICE_ID_INTEL_82443BX_0),
+       ID(PCI_DEVICE_ID_INTEL_82443GX_0),
+       ID(PCI_DEVICE_ID_INTEL_82810_MC1),
+       ID(PCI_DEVICE_ID_INTEL_82810_MC3),
+       ID(PCI_DEVICE_ID_INTEL_82810E_MC),
+       ID(PCI_DEVICE_ID_INTEL_82815_MC),
+       ID(PCI_DEVICE_ID_INTEL_82820_HB),
+       ID(PCI_DEVICE_ID_INTEL_82820_UP_HB),
+       ID(PCI_DEVICE_ID_INTEL_82830_HB),
+       ID(PCI_DEVICE_ID_INTEL_82840_HB),
+       ID(PCI_DEVICE_ID_INTEL_82845_HB),
+       ID(PCI_DEVICE_ID_INTEL_82845G_HB),
+       ID(PCI_DEVICE_ID_INTEL_82850_HB),
+       ID(PCI_DEVICE_ID_INTEL_82855PM_HB),
+       ID(PCI_DEVICE_ID_INTEL_82855GM_HB),
+       ID(PCI_DEVICE_ID_INTEL_82860_HB),
+       ID(PCI_DEVICE_ID_INTEL_82865_HB),
+       ID(PCI_DEVICE_ID_INTEL_82875_HB),
+       ID(PCI_DEVICE_ID_INTEL_7505_0),
+       ID(PCI_DEVICE_ID_INTEL_7205_0),
+       ID(PCI_DEVICE_ID_INTEL_82915G_HB),
        { }
 };
 
@@ -1479,8 +1778,7 @@ static struct pci_driver agp_intel_pci_driver = {
        .name           = "agpgart-intel",
        .id_table       = agp_intel_pci_table,
        .probe          = agp_intel_probe,
-       .remove         = agp_intel_remove,
-       .suspend        = agp_intel_suspend,
+       .remove         = __devexit_p(agp_intel_remove),
        .resume         = agp_intel_resume,
 };