intel-gtt: generic (insert|remove)_entries for sandybridge

Like before, but now with the added bonus of being able to kill
quite a bit of no-longer userful code (the old dmar support stuff).

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 8 insertions, 136 deletions

diff --git a/drivers/char/agp/intel-gtt.c b/drivers/char/agp/intel-gtt.c
index dc06b23c1431..44722c6790b2 100644
--- a/drivers/char/agp/intel-gtt.c
+++ b/drivers/char/agp/intel-gtt.c
@@ -177,61 +177,6 @@ static void intel_agp_unmap_memory(struct agp_memory *mem)
         intel_agp_free_sglist(mem);
 }
 
-#if USE_PCI_DMA_API
-static void intel_agp_insert_sg_entries(struct agp_memory *mem,
-                                        off_t pg_start, int mask_type)
-{
-        struct scatterlist *sg;
-        int i, j;
-
-        j = pg_start;
-
-        WARN_ON(!mem->num_sg);
-
-        if (mem->num_sg == mem->page_count) {
-                for_each_sg(mem->sg_list, sg, mem->page_count, i) {
-                        writel(agp_bridge->driver->mask_memory(agp_bridge,
-                                        sg_dma_address(sg), mask_type),
-                                        intel_private.gtt+j);
-                        j++;
-                }
-        } else {
-                /* sg may merge pages, but we have to separate
-                 * per-page addr for GTT */
-                unsigned int len, m;
-
-                for_each_sg(mem->sg_list, sg, mem->num_sg, i) {
-                        len = sg_dma_len(sg) / PAGE_SIZE;
-                        for (m = 0; m < len; m++) {
-                                writel(agp_bridge->driver->mask_memory(agp_bridge,
-                                                                       sg_dma_address(sg) + m * PAGE_SIZE,
-                                                                       mask_type),
-                                       intel_private.gtt+j);
-                                j++;
-                        }
-                }
-        }
-        readl(intel_private.gtt+j-1);
-}
-
-#else
-
-static void intel_agp_insert_sg_entries(struct agp_memory *mem,
-                                        off_t pg_start, int mask_type)
-{
-        int i, j;
-
-        for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
-                writel(agp_bridge->driver->mask_memory(agp_bridge,
-                                page_to_phys(mem->pages[i]), mask_type),
-                       intel_private.gtt+j);
-        }
-
-        readl(intel_private.gtt+j-1);
-}
-
-#endif
-
 static int intel_i810_fetch_size(void)
 {
         u32 smram_miscc;
@@ -1266,81 +1211,6 @@ static void intel_i915_chipset_flush(struct agp_bridge_data *bridge)
                 writel(1, intel_private.i9xx_flush_page);
 }
 
-static int intel_i915_insert_entries(struct agp_memory *mem, off_t pg_start,
-                                     int type)
-{
-        int num_entries;
-        void *temp;
-        int ret = -EINVAL;
-        int mask_type;
-
-        if (mem->page_count == 0)
-                goto out;
-
-        temp = agp_bridge->current_size;
-        num_entries = A_SIZE_FIX(temp)->num_entries;
-
-        if (pg_start < intel_private.base.gtt_stolen_entries) {
-                dev_printk(KERN_DEBUG, &intel_private.pcidev->dev,
-                           "pg_start == 0x%.8lx, gtt_stolen_entries == 0x%.8x\n",
-                           pg_start, intel_private.base.gtt_stolen_entries);
-
-                dev_info(&intel_private.pcidev->dev,
-                         "trying to insert into local/stolen memory\n");
-                goto out_err;
-        }
-
-        if ((pg_start + mem->page_count) > num_entries)
-                goto out_err;
-
-        /* The i915 can't check the GTT for entries since it's read only;
-         * depend on the caller to make the correct offset decisions.
-         */
-
-        if (type != mem->type)
-                goto out_err;
-
-        mask_type = agp_bridge->driver->agp_type_to_mask_type(agp_bridge, type);
-
-        if (INTEL_GTT_GEN != 6 && mask_type != 0 &&
-            mask_type != AGP_PHYS_MEMORY &&
-            mask_type != INTEL_AGP_CACHED_MEMORY)
-                goto out_err;
-
-        if (!mem->is_flushed)
-                global_cache_flush();
-
-        intel_agp_insert_sg_entries(mem, pg_start, mask_type);
-
- out:
-        ret = 0;
- out_err:
-        mem->is_flushed = true;
-        return ret;
-}
-
-static int intel_i915_remove_entries(struct agp_memory *mem, off_t pg_start,
-                                     int type)
-{
-        int i;
-
-        if (mem->page_count == 0)
-                return 0;
-
-        if (pg_start < intel_private.base.gtt_stolen_entries) {
-                dev_info(&intel_private.pcidev->dev,
-                         "trying to disable local/stolen memory\n");
-                return -EINVAL;
-        }
-
-        for (i = pg_start; i < (mem->page_count + pg_start); i++)
-                writel(agp_bridge->scratch_page, intel_private.gtt+i);
-
-        readl(intel_private.gtt+i-1);
-
-        return 0;
-}
-
 static void i965_write_entry(dma_addr_t addr, unsigned int entry,
                              unsigned int flags)
 {
@@ -1349,6 +1219,11 @@ static void i965_write_entry(dma_addr_t addr, unsigned int entry,
         writel(addr | I810_PTE_VALID, intel_private.gtt + entry);
 }
 
+static bool gen6_check_flags(unsigned int flags)
+{
+        return true;
+}
+
 static void gen6_write_entry(dma_addr_t addr, unsigned int entry,
                              unsigned int flags)
 {
@@ -1562,8 +1437,8 @@ static const struct agp_bridge_driver intel_gen6_driver = {
         .cache_flush            = global_cache_flush,
         .create_gatt_table      = intel_fake_agp_create_gatt_table,
         .free_gatt_table        = intel_fake_agp_free_gatt_table,
-        .insert_memory          = intel_i915_insert_entries,
-        .remove_memory          = intel_i915_remove_entries,
+        .insert_memory          = intel_fake_agp_insert_entries,
+        .remove_memory          = intel_fake_agp_remove_entries,
         .alloc_by_type          = intel_fake_agp_alloc_by_type,
         .free_by_type           = intel_i810_free_by_type,
         .agp_alloc_page         = agp_generic_alloc_page,
@@ -1572,10 +1447,6 @@ static const struct agp_bridge_driver intel_gen6_driver = {
         .agp_destroy_pages      = agp_generic_destroy_pages,
         .agp_type_to_mask_type  = intel_gen6_type_to_mask_type,
         .chipset_flush          = intel_i915_chipset_flush,
-#if USE_PCI_DMA_API
-        .agp_map_memory         = intel_agp_map_memory,
-        .agp_unmap_memory       = intel_agp_unmap_memory,
-#endif
 };
 
 static const struct agp_bridge_driver intel_g33_driver = {
@@ -1654,6 +1525,7 @@ static const struct intel_gtt_driver sandybridge_gtt_driver = {
         .gen = 6,
         .setup = i9xx_setup,
         .write_entry = gen6_write_entry,
+        .check_flags = gen6_check_flags,
 };
 
 /* Table to describe Intel GMCH and AGP/PCIE GART drivers.  At least one of