Signed-off-by: Casey Bowman <casey.g.bowman@xxxxxxxxx>
---
drivers/gpu/drm/i915/Makefile | 2 +
drivers/gpu/drm/i915/gt/intel_ggtt.c | 664 +-----------------------
drivers/gpu/drm/i915/gt/intel_gt.c | 4 +-
drivers/gpu/drm/i915/gt/intel_gt.h | 9 +
drivers/gpu/drm/i915/gt/intel_gt_gmch.c | 654 +++++++++++++++++++++++
drivers/gpu/drm/i915/gt/intel_gt_gmch.h | 46 ++
drivers/gpu/drm/i915/gt/intel_gtt.h | 9 +
7 files changed, 736 insertions(+), 652 deletions(-)
create mode 100644 drivers/gpu/drm/i915/gt/intel_gt_gmch.c
create mode 100644 drivers/gpu/drm/i915/gt/intel_gt_gmch.h
diff --git a/drivers/gpu/drm/i915/Makefile
b/drivers/gpu/drm/i915/Makefile
index c1d5540f6052..30b75b5895ae 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -126,6 +126,8 @@ gt-y += \
gt/intel_workarounds.o \
gt/shmem_utils.o \
gt/sysfs_engines.o
+# x86 intel-gtt module support
+gt-$(CONFIG_X86) += gt/intel_gt_gmch.o
# autogenerated null render state
gt-y += \
gt/gen6_renderstate.o \
diff --git a/drivers/gpu/drm/i915/gt/intel_ggtt.c
b/drivers/gpu/drm/i915/gt/intel_ggtt.c
index 86b2cd2a9f34..be25375ac6f1 100644
--- a/drivers/gpu/drm/i915/gt/intel_ggtt.c
+++ b/drivers/gpu/drm/i915/gt/intel_ggtt.c
@@ -3,22 +3,19 @@
* Copyright © 2020 Intel Corporation
*/
-#include <linux/agp_backend.h>
-#include <linux/stop_machine.h>
-
+#include <linux/types.h>
#include <asm/set_memory.h>
#include <asm/smp.h>
#include <drm/i915_drm.h>
-#include <drm/intel-gtt.h>
#include "gem/i915_gem_lmem.h"
#include "intel_gt.h"
+#include "intel_gt_gmch.h"
#include "intel_gt_regs.h"
#include "i915_drv.h"
#include "i915_scatterlist.h"
-#include "i915_utils.h"
#include "i915_vgpu.h"
#include "intel_gtt.h"
@@ -95,28 +92,6 @@ int i915_ggtt_init_hw(struct drm_i915_private *i915)
return 0;
}
-/*
- * Certain Gen5 chipsets require idling the GPU before
- * unmapping anything from the GTT when VT-d is enabled.
- */
-static bool needs_idle_maps(struct drm_i915_private *i915)
-{
- /*
- * Query intel_iommu to see if we need the workaround.
Presumably that
- * was loaded first.
- */
- if (!i915_vtd_active(i915))
- return false;
-
- if (GRAPHICS_VER(i915) == 5 && IS_MOBILE(i915))
- return true;
-
- if (GRAPHICS_VER(i915) == 12)
- return true; /* XXX DMAR fault reason 7 */
-
- return false;
-}
-
/**
* i915_ggtt_suspend_vm - Suspend the memory mappings for a GGTT
or DPT VM
* @vm: The VM to suspend the mappings for
@@ -205,7 +180,7 @@ void gen6_ggtt_invalidate(struct i915_ggtt *ggtt)
spin_unlock_irq(&uncore->lock);
}
-static void gen8_ggtt_invalidate(struct i915_ggtt *ggtt)
+void gen8_ggtt_invalidate(struct i915_ggtt *ggtt)
{
struct intel_uncore *uncore = ggtt->vm.gt->uncore;
@@ -230,11 +205,6 @@ static void guc_ggtt_invalidate(struct
i915_ggtt *ggtt)
intel_uncore_write_fw(uncore, GEN8_GTCR,
GEN8_GTCR_INVALIDATE);
}
-static void gmch_ggtt_invalidate(struct i915_ggtt *ggtt)
-{
- intel_gtt_chipset_flush();
-}
-
u64 gen8_ggtt_pte_encode(dma_addr_t addr,
enum i915_cache_level level,
u32 flags)
@@ -247,258 +217,7 @@ u64 gen8_ggtt_pte_encode(dma_addr_t addr,
return pte;
}
-static void gen8_set_pte(void __iomem *addr, gen8_pte_t pte)
-{
- writeq(pte, addr);
-}
-
-static void gen8_ggtt_insert_page(struct i915_address_space *vm,
- dma_addr_t addr,
- u64 offset,
- enum i915_cache_level level,
- u32 flags)
-{
- struct i915_ggtt *ggtt = i915_vm_to_ggtt(vm);
- gen8_pte_t __iomem *pte =
- (gen8_pte_t __iomem *)ggtt->gsm + offset / I915_GTT_PAGE_SIZE;
-
- gen8_set_pte(pte, gen8_ggtt_pte_encode(addr, level, flags));
-
- ggtt->invalidate(ggtt);
-}
-
-static void gen8_ggtt_insert_entries(struct i915_address_space *vm,
- struct i915_vma_resource *vma_res,
- enum i915_cache_level level,
- u32 flags)
-{
- const gen8_pte_t pte_encode = gen8_ggtt_pte_encode(0, level,
flags);
- struct i915_ggtt *ggtt = i915_vm_to_ggtt(vm);
- gen8_pte_t __iomem *gte;
- gen8_pte_t __iomem *end;
- struct sgt_iter iter;
- dma_addr_t addr;
-
- /*
- * Note that we ignore PTE_READ_ONLY here. The caller must be
careful
- * not to allow the user to override access to a read only page.
- */
-
- gte = (gen8_pte_t __iomem *)ggtt->gsm;
- gte += vma_res->start / I915_GTT_PAGE_SIZE;
- end = gte + vma_res->node_size / I915_GTT_PAGE_SIZE;
-
- for_each_sgt_daddr(addr, iter, vma_res->bi.pages)
- gen8_set_pte(gte++, pte_encode | addr);
- GEM_BUG_ON(gte > end);
-
- /* Fill the allocated but "unused" space beyond the end of
the buffer */
- while (gte < end)
- gen8_set_pte(gte++, vm->scratch[0]->encode);
-
- /*
- * We want to flush the TLBs only after we're certain all the PTE
- * updates have finished.
- */
- ggtt->invalidate(ggtt);
-}
-
-static void gen6_ggtt_insert_page(struct i915_address_space *vm,
- dma_addr_t addr,
- u64 offset,
- enum i915_cache_level level,
- u32 flags)
-{
- struct i915_ggtt *ggtt = i915_vm_to_ggtt(vm);
- gen6_pte_t __iomem *pte =
- (gen6_pte_t __iomem *)ggtt->gsm + offset / I915_GTT_PAGE_SIZE;
-
- iowrite32(vm->pte_encode(addr, level, flags), pte);
-
- ggtt->invalidate(ggtt);
-}
-
-/*
- * Binds an object into the global gtt with the specified cache level.
- * The object will be accessible to the GPU via commands whose operands
- * reference offsets within the global GTT as well as accessible
by the GPU
- * through the GMADR mapped BAR (i915->mm.gtt->gtt).
- */
-static void gen6_ggtt_insert_entries(struct i915_address_space *vm,
- struct i915_vma_resource *vma_res,
- enum i915_cache_level level,
- u32 flags)
-{
- struct i915_ggtt *ggtt = i915_vm_to_ggtt(vm);
- gen6_pte_t __iomem *gte;
- gen6_pte_t __iomem *end;
- struct sgt_iter iter;
- dma_addr_t addr;
-
- gte = (gen6_pte_t __iomem *)ggtt->gsm;
- gte += vma_res->start / I915_GTT_PAGE_SIZE;
- end = gte + vma_res->node_size / I915_GTT_PAGE_SIZE;
-
- for_each_sgt_daddr(addr, iter, vma_res->bi.pages)
- iowrite32(vm->pte_encode(addr, level, flags), gte++);
- GEM_BUG_ON(gte > end);
-
- /* Fill the allocated but "unused" space beyond the end of
the buffer */
- while (gte < end)
- iowrite32(vm->scratch[0]->encode, gte++);
-
- /*
- * We want to flush the TLBs only after we're certain all the PTE
- * updates have finished.
- */
- ggtt->invalidate(ggtt);
-}
-
-static void nop_clear_range(struct i915_address_space *vm,
- u64 start, u64 length)
-{
-}
-
-static void gen8_ggtt_clear_range(struct i915_address_space *vm,
- u64 start, u64 length)
-{
- struct i915_ggtt *ggtt = i915_vm_to_ggtt(vm);
- unsigned int first_entry = start / I915_GTT_PAGE_SIZE;
- unsigned int num_entries = length / I915_GTT_PAGE_SIZE;
- const gen8_pte_t scratch_pte = vm->scratch[0]->encode;
- gen8_pte_t __iomem *gtt_base =
- (gen8_pte_t __iomem *)ggtt->gsm + first_entry;
- const int max_entries = ggtt_total_entries(ggtt) - first_entry;
- int i;
-
- if (WARN(num_entries > max_entries,
- "First entry = %d; Num entries = %d (max=%d)\n",
- first_entry, num_entries, max_entries))
- num_entries = max_entries;
-
- for (i = 0; i < num_entries; i++)
- gen8_set_pte(>t_base[i], scratch_pte);
-}
-
-static void bxt_vtd_ggtt_wa(struct i915_address_space *vm)
-{
- /*
- * Make sure the internal GAM fifo has been cleared of all GTT
- * writes before exiting stop_machine(). This guarantees that
- * any aperture accesses waiting to start in another process
- * cannot back up behind the GTT writes causing a hang.
- * The register can be any arbitrary GAM register.
- */
- intel_uncore_posting_read_fw(vm->gt->uncore, GFX_FLSH_CNTL_GEN6);
-}
-
-struct insert_page {
- struct i915_address_space *vm;
- dma_addr_t addr;
- u64 offset;
- enum i915_cache_level level;
-};
-
-static int bxt_vtd_ggtt_insert_page__cb(void *_arg)
-{
- struct insert_page *arg = _arg;
-
- gen8_ggtt_insert_page(arg->vm, arg->addr, arg->offset,
arg->level, 0);
- bxt_vtd_ggtt_wa(arg->vm);
-
- return 0;
-}
-
-static void bxt_vtd_ggtt_insert_page__BKL(struct
i915_address_space *vm,
- dma_addr_t addr,
- u64 offset,
- enum i915_cache_level level,
- u32 unused)
-{
- struct insert_page arg = { vm, addr, offset, level };
-
- stop_machine(bxt_vtd_ggtt_insert_page__cb, &arg, NULL);
-}
-
-struct insert_entries {
- struct i915_address_space *vm;
- struct i915_vma_resource *vma_res;
- enum i915_cache_level level;
- u32 flags;
-};
-
-static int bxt_vtd_ggtt_insert_entries__cb(void *_arg)
-{
- struct insert_entries *arg = _arg;
-
- gen8_ggtt_insert_entries(arg->vm, arg->vma_res, arg->level,
arg->flags);
- bxt_vtd_ggtt_wa(arg->vm);
-
- return 0;
-}
-
-static void bxt_vtd_ggtt_insert_entries__BKL(struct
i915_address_space *vm,
- struct i915_vma_resource *vma_res,
- enum i915_cache_level level,
- u32 flags)
-{
- struct insert_entries arg = { vm, vma_res, level, flags };
-
- stop_machine(bxt_vtd_ggtt_insert_entries__cb, &arg, NULL);
-}
-
-static void gen6_ggtt_clear_range(struct i915_address_space *vm,
- u64 start, u64 length)
-{
- struct i915_ggtt *ggtt = i915_vm_to_ggtt(vm);
- unsigned int first_entry = start / I915_GTT_PAGE_SIZE;
- unsigned int num_entries = length / I915_GTT_PAGE_SIZE;
- gen6_pte_t scratch_pte, __iomem *gtt_base =
- (gen6_pte_t __iomem *)ggtt->gsm + first_entry;
- const int max_entries = ggtt_total_entries(ggtt) - first_entry;
- int i;
-
- if (WARN(num_entries > max_entries,
- "First entry = %d; Num entries = %d (max=%d)\n",
- first_entry, num_entries, max_entries))
- num_entries = max_entries;
-
- scratch_pte = vm->scratch[0]->encode;
- for (i = 0; i < num_entries; i++)
- iowrite32(scratch_pte, >t_base[i]);
-}
-
-static void i915_ggtt_insert_page(struct i915_address_space *vm,
- dma_addr_t addr,
- u64 offset,
- enum i915_cache_level cache_level,
- u32 unused)
-{
- unsigned int flags = (cache_level == I915_CACHE_NONE) ?
- AGP_USER_MEMORY : AGP_USER_CACHED_MEMORY;
-
- intel_gtt_insert_page(addr, offset >> PAGE_SHIFT, flags);
-}
-
-static void i915_ggtt_insert_entries(struct i915_address_space *vm,
- struct i915_vma_resource *vma_res,
- enum i915_cache_level cache_level,
- u32 unused)
-{
- unsigned int flags = (cache_level == I915_CACHE_NONE) ?
- AGP_USER_MEMORY : AGP_USER_CACHED_MEMORY;
-
- intel_gtt_insert_sg_entries(vma_res->bi.pages, vma_res->start
PAGE_SHIFT,
- flags);
-}
-
-static void i915_ggtt_clear_range(struct i915_address_space *vm,
- u64 start, u64 length)
-{
- intel_gtt_clear_range(start >> PAGE_SHIFT, length >> PAGE_SHIFT);
-}
-
-static void ggtt_bind_vma(struct i915_address_space *vm,
+void intel_ggtt_bind_vma(struct i915_address_space *vm,
struct i915_vm_pt_stash *stash,
struct i915_vma_resource *vma_res,
enum i915_cache_level cache_level,
@@ -522,7 +241,7 @@ static void ggtt_bind_vma(struct
i915_address_space *vm,
vma_res->page_sizes_gtt = I915_GTT_PAGE_SIZE;
}
-static void ggtt_unbind_vma(struct i915_address_space *vm,
+void intel_ggtt_unbind_vma(struct i915_address_space *vm,
struct i915_vma_resource *vma_res)
{
vm->clear_range(vm, vma_res->start, vma_res->vma_size);
@@ -725,10 +444,10 @@ static int init_aliasing_ppgtt(struct
i915_ggtt *ggtt)
ggtt->alias = ppgtt;
ggtt->vm.bind_async_flags |= ppgtt->vm.bind_async_flags;
- GEM_BUG_ON(ggtt->vm.vma_ops.bind_vma != ggtt_bind_vma);
+ GEM_BUG_ON(ggtt->vm.vma_ops.bind_vma != intel_ggtt_bind_vma);
ggtt->vm.vma_ops.bind_vma = aliasing_gtt_bind_vma;
- GEM_BUG_ON(ggtt->vm.vma_ops.unbind_vma != ggtt_unbind_vma);
+ GEM_BUG_ON(ggtt->vm.vma_ops.unbind_vma != intel_ggtt_unbind_vma);
ggtt->vm.vma_ops.unbind_vma = aliasing_gtt_unbind_vma;
i915_vm_free_pt_stash(&ppgtt->vm, &stash);
@@ -751,8 +470,8 @@ static void fini_aliasing_ppgtt(struct
i915_ggtt *ggtt)
i915_vm_put(&ppgtt->vm);
- ggtt->vm.vma_ops.bind_vma = ggtt_bind_vma;
- ggtt->vm.vma_ops.unbind_vma = ggtt_unbind_vma;
+ ggtt->vm.vma_ops.bind_vma = intel_ggtt_bind_vma;
+ ggtt->vm.vma_ops.unbind_vma = intel_ggtt_unbind_vma;
}
int i915_init_ggtt(struct drm_i915_private *i915)
@@ -840,364 +559,12 @@ void i915_ggtt_driver_late_release(struct
drm_i915_private *i915)
dma_resv_fini(&ggtt->vm._resv);
}
-static unsigned int gen6_get_total_gtt_size(u16 snb_gmch_ctl)
-{
- snb_gmch_ctl >>= SNB_GMCH_GGMS_SHIFT;
- snb_gmch_ctl &= SNB_GMCH_GGMS_MASK;
- return snb_gmch_ctl << 20;
-}
-
-static unsigned int gen8_get_total_gtt_size(u16 bdw_gmch_ctl)
-{
- bdw_gmch_ctl >>= BDW_GMCH_GGMS_SHIFT;
- bdw_gmch_ctl &= BDW_GMCH_GGMS_MASK;
- if (bdw_gmch_ctl)
- bdw_gmch_ctl = 1 << bdw_gmch_ctl;
-
-#ifdef CONFIG_X86_32
- /* Limit 32b platforms to a 2GB GGTT: 4 << 20 / pte size *
I915_GTT_PAGE_SIZE */
- if (bdw_gmch_ctl > 4)
- bdw_gmch_ctl = 4;
-#endif
-
- return bdw_gmch_ctl << 20;
-}
-
-static unsigned int chv_get_total_gtt_size(u16 gmch_ctrl)
-{
- gmch_ctrl >>= SNB_GMCH_GGMS_SHIFT;
- gmch_ctrl &= SNB_GMCH_GGMS_MASK;
-
- if (gmch_ctrl)
- return 1 << (20 + gmch_ctrl);
-
- return 0;
-}
-
-static unsigned int gen6_gttmmadr_size(struct drm_i915_private *i915)
-{
- /*
- * GEN6: GTTMMADR size is 4MB and GTTADR starts at 2MB offset
- * GEN8: GTTMMADR size is 16MB and GTTADR starts at 8MB offset
- */
- GEM_BUG_ON(GRAPHICS_VER(i915) < 6);
- return (GRAPHICS_VER(i915) < 8) ? SZ_4M : SZ_16M;
-}
-
-static unsigned int gen6_gttadr_offset(struct drm_i915_private *i915)
-{
- return gen6_gttmmadr_size(i915) / 2;
-}
-
-static int ggtt_probe_common(struct i915_ggtt *ggtt, u64 size)
-{
- struct drm_i915_private *i915 = ggtt->vm.i915;
- struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
- phys_addr_t phys_addr;
- u32 pte_flags;
- int ret;
-
- GEM_WARN_ON(pci_resource_len(pdev, 0) != gen6_gttmmadr_size(i915));
- phys_addr = pci_resource_start(pdev, 0) + gen6_gttadr_offset(i915);
-
- /*
- * On BXT+/ICL+ writes larger than 64 bit to the GTT
pagetable range
- * will be dropped. For WC mappings in general we have 64
byte burst
- * writes when the WC buffer is flushed, so we can't use it,
but have to
- * resort to an uncached mapping. The WC issue is easily
caught by the
- * readback check when writing GTT PTE entries.
- */
- if (IS_GEN9_LP(i915) || GRAPHICS_VER(i915) >= 11)
- ggtt->gsm = ioremap(phys_addr, size);
- else
- ggtt->gsm = ioremap_wc(phys_addr, size);
- if (!ggtt->gsm) {
- drm_err(&i915->drm, "Failed to map the ggtt page table\n");
- return -ENOMEM;
- }
-
- kref_init(&ggtt->vm.resv_ref);
- ret = setup_scratch_page(&ggtt->vm);
- if (ret) {
- drm_err(&i915->drm, "Scratch setup failed\n");
- /* iounmap will also get called at remove, but meh */
- iounmap(ggtt->gsm);
- return ret;
- }
-
- pte_flags = 0;
- if (i915_gem_object_is_lmem(ggtt->vm.scratch[0]))
- pte_flags |= PTE_LM;
-
- ggtt->vm.scratch[0]->encode =
- ggtt->vm.pte_encode(px_dma(ggtt->vm.scratch[0]),
- I915_CACHE_NONE, pte_flags);
-
- return 0;
-}
-
-static void gen6_gmch_remove(struct i915_address_space *vm)
-{
- struct i915_ggtt *ggtt = i915_vm_to_ggtt(vm);
-
- iounmap(ggtt->gsm);
- free_scratch(vm);
-}
-
-static struct resource pci_resource(struct pci_dev *pdev, int bar)
+struct resource intel_pci_resource(struct pci_dev *pdev, int bar)
{
return (struct
resource)DEFINE_RES_MEM(pci_resource_start(pdev, bar),
pci_resource_len(pdev, bar));
}
-static int gen8_gmch_probe(struct i915_ggtt *ggtt)
-{
- struct drm_i915_private *i915 = ggtt->vm.i915;
- struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
- unsigned int size;
- u16 snb_gmch_ctl;
-
- /* TODO: We're not aware of mappable constraints on gen8 yet */
- if (!HAS_LMEM(i915)) {
- ggtt->gmadr = pci_resource(pdev, 2);
- ggtt->mappable_end = resource_size(&ggtt->gmadr);
- }
-
- pci_read_config_word(pdev, SNB_GMCH_CTRL, &snb_gmch_ctl);
- if (IS_CHERRYVIEW(i915))
- size = chv_get_total_gtt_size(snb_gmch_ctl);
- else
- size = gen8_get_total_gtt_size(snb_gmch_ctl);
-
- ggtt->vm.alloc_pt_dma = alloc_pt_dma;
- ggtt->vm.alloc_scratch_dma = alloc_pt_dma;
- ggtt->vm.lmem_pt_obj_flags = I915_BO_ALLOC_PM_EARLY;
-
- ggtt->vm.total = (size / sizeof(gen8_pte_t)) * I915_GTT_PAGE_SIZE;
- ggtt->vm.cleanup = gen6_gmch_remove;
- ggtt->vm.insert_page = gen8_ggtt_insert_page;
- ggtt->vm.clear_range = nop_clear_range;
- if (intel_scanout_needs_vtd_wa(i915))
- ggtt->vm.clear_range = gen8_ggtt_clear_range;
-
- ggtt->vm.insert_entries = gen8_ggtt_insert_entries;
-
- /*
- * Serialize GTT updates with aperture access on BXT if VT-d is on,
- * and always on CHV.
- */
- if (intel_vm_no_concurrent_access_wa(i915)) {
- ggtt->vm.insert_entries = bxt_vtd_ggtt_insert_entries__BKL;
- ggtt->vm.insert_page = bxt_vtd_ggtt_insert_page__BKL;
- ggtt->vm.bind_async_flags =
- I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND;
- }
-
- ggtt->invalidate = gen8_ggtt_invalidate;
-
- ggtt->vm.vma_ops.bind_vma = ggtt_bind_vma;
- ggtt->vm.vma_ops.unbind_vma = ggtt_unbind_vma;
-
- ggtt->vm.pte_encode = gen8_ggtt_pte_encode;
-
- setup_private_pat(ggtt->vm.gt->uncore);
-
- return ggtt_probe_common(ggtt, size);
-}
-
-static u64 snb_pte_encode(dma_addr_t addr,
- enum i915_cache_level level,
- u32 flags)
-{
- gen6_pte_t pte = GEN6_PTE_ADDR_ENCODE(addr) | GEN6_PTE_VALID;
-
- switch (level) {
- case I915_CACHE_L3_LLC:
- case I915_CACHE_LLC:
- pte |= GEN6_PTE_CACHE_LLC;
- break;
- case I915_CACHE_NONE:
- pte |= GEN6_PTE_UNCACHED;
- break;
- default:
- MISSING_CASE(level);
- }
-
- return pte;
-}
-
-static u64 ivb_pte_encode(dma_addr_t addr,
- enum i915_cache_level level,
- u32 flags)
-{
- gen6_pte_t pte = GEN6_PTE_ADDR_ENCODE(addr) | GEN6_PTE_VALID;
-
- switch (level) {
- case I915_CACHE_L3_LLC:
- pte |= GEN7_PTE_CACHE_L3_LLC;
- break;
- case I915_CACHE_LLC:
- pte |= GEN6_PTE_CACHE_LLC;
- break;
- case I915_CACHE_NONE:
- pte |= GEN6_PTE_UNCACHED;
- break;
- default:
- MISSING_CASE(level);
- }
-
- return pte;
-}
-
-static u64 byt_pte_encode(dma_addr_t addr,
- enum i915_cache_level level,
- u32 flags)
-{
- gen6_pte_t pte = GEN6_PTE_ADDR_ENCODE(addr) | GEN6_PTE_VALID;
-
- if (!(flags & PTE_READ_ONLY))
- pte |= BYT_PTE_WRITEABLE;
-
- if (level != I915_CACHE_NONE)
- pte |= BYT_PTE_SNOOPED_BY_CPU_CACHES;
-
- return pte;
-}
-
-static u64 hsw_pte_encode(dma_addr_t addr,
- enum i915_cache_level level,
- u32 flags)
-{
- gen6_pte_t pte = HSW_PTE_ADDR_ENCODE(addr) | GEN6_PTE_VALID;
-
- if (level != I915_CACHE_NONE)
- pte |= HSW_WB_LLC_AGE3;
-
- return pte;
-}
-
-static u64 iris_pte_encode(dma_addr_t addr,
- enum i915_cache_level level,
- u32 flags)
-{
- gen6_pte_t pte = HSW_PTE_ADDR_ENCODE(addr) | GEN6_PTE_VALID;
-
- switch (level) {
- case I915_CACHE_NONE:
- break;
- case I915_CACHE_WT:
- pte |= HSW_WT_ELLC_LLC_AGE3;
- break;
- default:
- pte |= HSW_WB_ELLC_LLC_AGE3;
- break;
- }
-
- return pte;
-}
-
-static int gen6_gmch_probe(struct i915_ggtt *ggtt)
-{
- struct drm_i915_private *i915 = ggtt->vm.i915;
- struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
- unsigned int size;
- u16 snb_gmch_ctl;
-
- ggtt->gmadr = pci_resource(pdev, 2);
- ggtt->mappable_end = resource_size(&ggtt->gmadr);
-
- /*
- * 64/512MB is the current min/max we actually know of, but this is
- * just a coarse sanity check.
- */
- if (ggtt->mappable_end < (64<<20) || ggtt->mappable_end >
(512<<20)) {
- drm_err(&i915->drm, "Unknown GMADR size (%pa)\n",
- &ggtt->mappable_end);
- return -ENXIO;
- }
-
- pci_read_config_word(pdev, SNB_GMCH_CTRL, &snb_gmch_ctl);
-
- size = gen6_get_total_gtt_size(snb_gmch_ctl);
- ggtt->vm.total = (size / sizeof(gen6_pte_t)) * I915_GTT_PAGE_SIZE;
-
- ggtt->vm.alloc_pt_dma = alloc_pt_dma;
- ggtt->vm.alloc_scratch_dma = alloc_pt_dma;
-
- ggtt->vm.clear_range = nop_clear_range;
- if (!HAS_FULL_PPGTT(i915) || intel_scanout_needs_vtd_wa(i915))
- ggtt->vm.clear_range = gen6_ggtt_clear_range;
- ggtt->vm.insert_page = gen6_ggtt_insert_page;
- ggtt->vm.insert_entries = gen6_ggtt_insert_entries;
- ggtt->vm.cleanup = gen6_gmch_remove;
-
- ggtt->invalidate = gen6_ggtt_invalidate;
-
- if (HAS_EDRAM(i915))
- ggtt->vm.pte_encode = iris_pte_encode;
- else if (IS_HASWELL(i915))
- ggtt->vm.pte_encode = hsw_pte_encode;
- else if (IS_VALLEYVIEW(i915))
- ggtt->vm.pte_encode = byt_pte_encode;
- else if (GRAPHICS_VER(i915) >= 7)
- ggtt->vm.pte_encode = ivb_pte_encode;
- else
- ggtt->vm.pte_encode = snb_pte_encode;
-
- ggtt->vm.vma_ops.bind_vma = ggtt_bind_vma;
- ggtt->vm.vma_ops.unbind_vma = ggtt_unbind_vma;
-
- return ggtt_probe_common(ggtt, size);
-}
-
-static void i915_gmch_remove(struct i915_address_space *vm)
-{
- intel_gmch_remove();
-}
-
-static int i915_gmch_probe(struct i915_ggtt *ggtt)
-{
- struct drm_i915_private *i915 = ggtt->vm.i915;
- phys_addr_t gmadr_base;
- int ret;
-
- ret = intel_gmch_probe(i915->bridge_dev,
to_pci_dev(i915->drm.dev), NULL);
- if (!ret) {
- drm_err(&i915->drm, "failed to set up gmch\n");
- return -EIO;
- }
-
- intel_gtt_get(&ggtt->vm.total, &gmadr_base, &ggtt->mappable_end);
-
- ggtt->gmadr =
- (struct resource)DEFINE_RES_MEM(gmadr_base,
ggtt->mappable_end);
-
- ggtt->vm.alloc_pt_dma = alloc_pt_dma;
- ggtt->vm.alloc_scratch_dma = alloc_pt_dma;
-
- if (needs_idle_maps(i915)) {
- drm_notice(&i915->drm,
- "Flushing DMA requests before IOMMU unmaps;
performance may be degraded\n");
- ggtt->do_idle_maps = true;
- }
-
- ggtt->vm.insert_page = i915_ggtt_insert_page;
- ggtt->vm.insert_entries = i915_ggtt_insert_entries;
- ggtt->vm.clear_range = i915_ggtt_clear_range;
- ggtt->vm.cleanup = i915_gmch_remove;
-
- ggtt->invalidate = gmch_ggtt_invalidate;
-
- ggtt->vm.vma_ops.bind_vma = ggtt_bind_vma;
- ggtt->vm.vma_ops.unbind_vma = ggtt_unbind_vma;
-
- if (unlikely(ggtt->do_idle_maps))
- drm_notice(&i915->drm,
- "Applying Ironlake quirks for intel_iommu\n");
-
- return 0;
-}
-
static int ggtt_probe_hw(struct i915_ggtt *ggtt, struct intel_gt *gt)
{
struct drm_i915_private *i915 = gt->i915;
@@ -1209,11 +576,11 @@ static int ggtt_probe_hw(struct i915_ggtt
*ggtt, struct intel_gt *gt)
dma_resv_init(&ggtt->vm._resv);
if (GRAPHICS_VER(i915) <= 5)
- ret = i915_gmch_probe(ggtt);
+ ret = intel_gt_gmch_gen5_probe(ggtt);
else if (GRAPHICS_VER(i915) < 8)
- ret = gen6_gmch_probe(ggtt);
+ ret = intel_gt_gmch_gen6_probe(ggtt);
else
- ret = gen8_gmch_probe(ggtt);
+ ret = intel_gt_gmch_gen8_probe(ggtt);
if (ret) {
dma_resv_fini(&ggtt->vm._resv);
return ret;
@@ -1267,10 +634,7 @@ int i915_ggtt_probe_hw(struct
drm_i915_private *i915)
int i915_ggtt_enable_hw(struct drm_i915_private *i915)
{
- if (GRAPHICS_VER(i915) < 6 && !intel_enable_gtt())
- return -EIO;
-
- return 0;
+ return intel_gt_gmch_gen5_enable_hw(i915);
}
void i915_ggtt_enable_guc(struct i915_ggtt *ggtt)
diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c
b/drivers/gpu/drm/i915/gt/intel_gt.c
index 5001a6168d56..f0014c5072c9 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt.c
+++ b/drivers/gpu/drm/i915/gt/intel_gt.c
@@ -4,7 +4,6 @@
*/
#include <drm/drm_managed.h>
-#include <drm/intel-gtt.h>
#include "gem/i915_gem_internal.h"
#include "gem/i915_gem_lmem.h"
@@ -17,6 +16,7 @@
#include "intel_gt_buffer_pool.h"
#include "intel_gt_clock_utils.h"
#include "intel_gt_debugfs.h"
+#include "intel_gt_gmch.h"
#include "intel_gt_pm.h"
#include "intel_gt_regs.h"
#include "intel_gt_requests.h"
@@ -451,7 +451,7 @@ void intel_gt_chipset_flush(struct intel_gt *gt)
{
wmb();
if (GRAPHICS_VER(gt->i915) < 6)
- intel_gtt_chipset_flush();
+ intel_gt_gmch_gen5_chipset_flush(gt);
}
void intel_gt_driver_register(struct intel_gt *gt)
diff --git a/drivers/gpu/drm/i915/gt/intel_gt.h
b/drivers/gpu/drm/i915/gt/intel_gt.h
index e76168e10a21..0163bba0959e 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt.h
+++ b/drivers/gpu/drm/i915/gt/intel_gt.h
@@ -13,6 +13,13 @@
struct drm_i915_private;
struct drm_printer;
+struct insert_entries {
+ struct i915_address_space *vm;
+ struct i915_vma_resource *vma_res;
+ enum i915_cache_level level;
+ u32 flags;
+};
+
#define GT_TRACE(gt, fmt, ...) do { \
const struct intel_gt *gt__ __maybe_unused = (gt); \
GEM_TRACE("%s " fmt, dev_name(gt__->i915->drm.dev), \
@@ -113,4 +120,6 @@ void intel_gt_watchdog_work(struct work_struct
*work);
void intel_gt_invalidate_tlbs(struct intel_gt *gt);
+struct resource intel_pci_resource(struct pci_dev *pdev, int bar);
+
#endif /* __INTEL_GT_H__ */
diff --git a/drivers/gpu/drm/i915/gt/intel_gt_gmch.c
b/drivers/gpu/drm/i915/gt/intel_gt_gmch.c
new file mode 100644
index 000000000000..18e488672d1b
--- /dev/null
+++ b/drivers/gpu/drm/i915/gt/intel_gt_gmch.c
@@ -0,0 +1,654 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2022 Intel Corporation
+ */
+
+#include <drm/intel-gtt.h>
+#include <drm/i915_drm.h>
+
+#include <linux/agp_backend.h>
+#include <linux/stop_machine.h>
+
+#include "i915_drv.h"
+#include "intel_gt_gmch.h"
+#include "intel_gt_regs.h"
+#include "intel_gt.h"
+#include "i915_utils.h"
+
+#include "gen8_ppgtt.h"
+
+struct insert_page {
+ struct i915_address_space *vm;
+ dma_addr_t addr;
+ u64 offset;
+ enum i915_cache_level level;
+};
+
+static void gen8_set_pte(void __iomem *addr, gen8_pte_t pte)
+{
+ writeq(pte, addr);
+}
+
+static void nop_clear_range(struct i915_address_space *vm,
+ u64 start, u64 length)
+{
+}
+
+static u64 snb_pte_encode(dma_addr_t addr,
+ enum i915_cache_level level,
+ u32 flags)
+{
+ gen6_pte_t pte = GEN6_PTE_ADDR_ENCODE(addr) | GEN6_PTE_VALID;
+
+ switch (level) {
+ case I915_CACHE_L3_LLC:
+ case I915_CACHE_LLC:
+ pte |= GEN6_PTE_CACHE_LLC;
+ break;
+ case I915_CACHE_NONE:
+ pte |= GEN6_PTE_UNCACHED;
+ break;
+ default:
+ MISSING_CASE(level);
+ }
+
+ return pte;
+}
+
+static u64 ivb_pte_encode(dma_addr_t addr,
+ enum i915_cache_level level,
+ u32 flags)
+{
+ gen6_pte_t pte = GEN6_PTE_ADDR_ENCODE(addr) | GEN6_PTE_VALID;
+
+ switch (level) {
+ case I915_CACHE_L3_LLC:
+ pte |= GEN7_PTE_CACHE_L3_LLC;
+ break;
+ case I915_CACHE_LLC:
+ pte |= GEN6_PTE_CACHE_LLC;
+ break;
+ case I915_CACHE_NONE:
+ pte |= GEN6_PTE_UNCACHED;
+ break;
+ default:
+ MISSING_CASE(level);
+ }
+
+ return pte;
+}
+
+static u64 byt_pte_encode(dma_addr_t addr,
+ enum i915_cache_level level,
+ u32 flags)
+{
+ gen6_pte_t pte = GEN6_PTE_ADDR_ENCODE(addr) | GEN6_PTE_VALID;
+
+ if (!(flags & PTE_READ_ONLY))
+ pte |= BYT_PTE_WRITEABLE;
+
+ if (level != I915_CACHE_NONE)
+ pte |= BYT_PTE_SNOOPED_BY_CPU_CACHES;
+
+ return pte;
+}
+
+static u64 hsw_pte_encode(dma_addr_t addr,
+ enum i915_cache_level level,
+ u32 flags)
+{
+ gen6_pte_t pte = HSW_PTE_ADDR_ENCODE(addr) | GEN6_PTE_VALID;
+
+ if (level != I915_CACHE_NONE)
+ pte |= HSW_WB_LLC_AGE3;
+
+ return pte;
+}
+
+static u64 iris_pte_encode(dma_addr_t addr,
+ enum i915_cache_level level,
+ u32 flags)
+{
+ gen6_pte_t pte = HSW_PTE_ADDR_ENCODE(addr) | GEN6_PTE_VALID;
+
+ switch (level) {
+ case I915_CACHE_NONE:
+ break;
+ case I915_CACHE_WT:
+ pte |= HSW_WT_ELLC_LLC_AGE3;
+ break;
+ default:
+ pte |= HSW_WB_ELLC_LLC_AGE3;
+ break;
+ }
+
+ return pte;
+}
+
+static void gen5_ggtt_insert_page(struct i915_address_space *vm,
+ dma_addr_t addr,
+ u64 offset,
+ enum i915_cache_level cache_level,
+ u32 unused)
+{
+ unsigned int flags = (cache_level == I915_CACHE_NONE) ?
+ AGP_USER_MEMORY : AGP_USER_CACHED_MEMORY;
+
+ intel_gtt_insert_page(addr, offset >> PAGE_SHIFT, flags);
+}
+
+static void gen6_ggtt_insert_page(struct i915_address_space *vm,
+ dma_addr_t addr,
+ u64 offset,
+ enum i915_cache_level level,
+ u32 flags)
+{
+ struct i915_ggtt *ggtt = i915_vm_to_ggtt(vm);
+ gen6_pte_t __iomem *pte =
+ (gen6_pte_t __iomem *)ggtt->gsm + offset / I915_GTT_PAGE_SIZE;
+
+ iowrite32(vm->pte_encode(addr, level, flags), pte);
+
+ ggtt->invalidate(ggtt);
+}
+
+static void gen8_ggtt_insert_page(struct i915_address_space *vm,
+ dma_addr_t addr,
+ u64 offset,
+ enum i915_cache_level level,
+ u32 flags)
+{
+ struct i915_ggtt *ggtt = i915_vm_to_ggtt(vm);
+ gen8_pte_t __iomem *pte =
+ (gen8_pte_t __iomem *)ggtt->gsm + offset / I915_GTT_PAGE_SIZE;
+
+ gen8_set_pte(pte, gen8_ggtt_pte_encode(addr, level, flags));
+
+ ggtt->invalidate(ggtt);
+}
+
+static void gen5_ggtt_insert_entries(struct i915_address_space *vm,
+ struct i915_vma_resource *vma_res,
+ enum i915_cache_level cache_level,
+ u32 unused)
+{
+ unsigned int flags = (cache_level == I915_CACHE_NONE) ?
+ AGP_USER_MEMORY : AGP_USER_CACHED_MEMORY;
+
+ intel_gtt_insert_sg_entries(vma_res->bi.pages, vma_res->start
PAGE_SHIFT,
+ flags);
+}
+
+/*
+ * Binds an object into the global gtt with the specified cache level.
+ * The object will be accessible to the GPU via commands whose operands
+ * reference offsets within the global GTT as well as accessible
by the GPU
+ * through the GMADR mapped BAR (i915->mm.gtt->gtt).
+ */
+static void gen6_ggtt_insert_entries(struct i915_address_space *vm,
+ struct i915_vma_resource *vma_res,
+ enum i915_cache_level level,
+ u32 flags)
+{
+ struct i915_ggtt *ggtt = i915_vm_to_ggtt(vm);
+ gen6_pte_t __iomem *gte;
+ gen6_pte_t __iomem *end;
+ struct sgt_iter iter;
+ dma_addr_t addr;
+
+ gte = (gen6_pte_t __iomem *)ggtt->gsm;
+ gte += vma_res->start / I915_GTT_PAGE_SIZE;
+ end = gte + vma_res->node_size / I915_GTT_PAGE_SIZE;
+
+ for_each_sgt_daddr(addr, iter, vma_res->bi.pages)
+ iowrite32(vm->pte_encode(addr, level, flags), gte++);
+ GEM_BUG_ON(gte > end);
+
+ /* Fill the allocated but "unused" space beyond the end of
the buffer */
+ while (gte < end)
+ iowrite32(vm->scratch[0]->encode, gte++);
+
+ /*
+ * We want to flush the TLBs only after we're certain all the PTE
+ * updates have finished.
+ */
+ ggtt->invalidate(ggtt);
+}
+
+static void gen8_ggtt_insert_entries(struct i915_address_space *vm,
+ struct i915_vma_resource *vma_res,
+ enum i915_cache_level level,
+ u32 flags)
+{
+ const gen8_pte_t pte_encode = gen8_ggtt_pte_encode(0, level,
flags);
+ struct i915_ggtt *ggtt = i915_vm_to_ggtt(vm);
+ gen8_pte_t __iomem *gte;
+ gen8_pte_t __iomem *end;
+ struct sgt_iter iter;
+ dma_addr_t addr;
+
+ /*
+ * Note that we ignore PTE_READ_ONLY here. The caller must be
careful
+ * not to allow the user to override access to a read only page.
+ */
+
+ gte = (gen8_pte_t __iomem *)ggtt->gsm;
+ gte += vma_res->start / I915_GTT_PAGE_SIZE;
+ end = gte + vma_res->node_size / I915_GTT_PAGE_SIZE;
+
+ for_each_sgt_daddr(addr, iter, vma_res->bi.pages)
+ gen8_set_pte(gte++, pte_encode | addr);
+ GEM_BUG_ON(gte > end);
+
+ /* Fill the allocated but "unused" space beyond the end of
the buffer */
+ while (gte < end)
+ gen8_set_pte(gte++, vm->scratch[0]->encode);
+
+ /*
+ * We want to flush the TLBs only after we're certain all the PTE
+ * updates have finished.
+ */
+ ggtt->invalidate(ggtt);
+}
+
+static void bxt_vtd_ggtt_wa(struct i915_address_space *vm)
+{
+ /*
+ * Make sure the internal GAM fifo has been cleared of all GTT
+ * writes before exiting stop_machine(). This guarantees that
+ * any aperture accesses waiting to start in another process
+ * cannot back up behind the GTT writes causing a hang.
+ * The register can be any arbitrary GAM register.
+ */
+ intel_uncore_posting_read_fw(vm->gt->uncore, GFX_FLSH_CNTL_GEN6);
+}
+
+static int bxt_vtd_ggtt_insert_page__cb(void *_arg)
+{
+ struct insert_page *arg = _arg;
+
+ gen8_ggtt_insert_page(arg->vm, arg->addr, arg->offset,
arg->level, 0);
+ bxt_vtd_ggtt_wa(arg->vm);
+
+ return 0;
+}
+
+static void bxt_vtd_ggtt_insert_page__BKL(struct
i915_address_space *vm,
+ dma_addr_t addr,
+ u64 offset,
+ enum i915_cache_level level,
+ u32 unused)
+{
+ struct insert_page arg = { vm, addr, offset, level };
+
+ stop_machine(bxt_vtd_ggtt_insert_page__cb, &arg, NULL);
+}
+
+static int bxt_vtd_ggtt_insert_entries__cb(void *_arg)
+{
+ struct insert_entries *arg = _arg;
+
+ gen8_ggtt_insert_entries(arg->vm, arg->vma_res, arg->level,
arg->flags);
+ bxt_vtd_ggtt_wa(arg->vm);
+
+ return 0;
+}
+
+static void bxt_vtd_ggtt_insert_entries__BKL(struct
i915_address_space *vm,
+ struct i915_vma_resource *vma_res,
+ enum i915_cache_level level,
+ u32 flags)
+{
+ struct insert_entries arg = { vm, vma_res, level, flags };
+
+ stop_machine(bxt_vtd_ggtt_insert_entries__cb, &arg, NULL);
+}
+
+void intel_gt_gmch_gen5_chipset_flush(struct intel_gt *gt)
+{
+ intel_gtt_chipset_flush();
+}
+
+static void gmch_ggtt_invalidate(struct i915_ggtt *ggtt)
+{
+ intel_gtt_chipset_flush();
+}
+
+static void gen5_ggtt_clear_range(struct i915_address_space *vm,
+ u64 start, u64 length)
+{
+ intel_gtt_clear_range(start >> PAGE_SHIFT, length >> PAGE_SHIFT);
+}
+
+static void gen6_ggtt_clear_range(struct i915_address_space *vm,
+ u64 start, u64 length)
+{
+ struct i915_ggtt *ggtt = i915_vm_to_ggtt(vm);
+ unsigned int first_entry = start / I915_GTT_PAGE_SIZE;
+ unsigned int num_entries = length / I915_GTT_PAGE_SIZE;
+ gen6_pte_t scratch_pte, __iomem *gtt_base =
+ (gen6_pte_t __iomem *)ggtt->gsm + first_entry;
+ const int max_entries = ggtt_total_entries(ggtt) - first_entry;
+ int i;
+
+ if (WARN(num_entries > max_entries,
+ "First entry = %d; Num entries = %d (max=%d)\n",
+ first_entry, num_entries, max_entries))
+ num_entries = max_entries;
+
+ scratch_pte = vm->scratch[0]->encode;
+ for (i = 0; i < num_entries; i++)
+ iowrite32(scratch_pte, >t_base[i]);
+}
+
+static void gen8_ggtt_clear_range(struct i915_address_space *vm,
+ u64 start, u64 length)
+{
+ struct i915_ggtt *ggtt = i915_vm_to_ggtt(vm);
+ unsigned int first_entry = start / I915_GTT_PAGE_SIZE;
+ unsigned int num_entries = length / I915_GTT_PAGE_SIZE;
+ const gen8_pte_t scratch_pte = vm->scratch[0]->encode;
+ gen8_pte_t __iomem *gtt_base =
+ (gen8_pte_t __iomem *)ggtt->gsm + first_entry;
+ const int max_entries = ggtt_total_entries(ggtt) - first_entry;
+ int i;
+
+ if (WARN(num_entries > max_entries,
+ "First entry = %d; Num entries = %d (max=%d)\n",
+ first_entry, num_entries, max_entries))
+ num_entries = max_entries;
+
+ for (i = 0; i < num_entries; i++)
+ gen8_set_pte(>t_base[i], scratch_pte);
+}
+
+static void gen5_gmch_remove(struct i915_address_space *vm)
+{
+ intel_gmch_remove();
+}
+
+static void gen6_gmch_remove(struct i915_address_space *vm)
+{
+ struct i915_ggtt *ggtt = i915_vm_to_ggtt(vm);
+
+ iounmap(ggtt->gsm);
+ free_scratch(vm);
+}
+
+/*
+ * Certain Gen5 chipsets require idling the GPU before
+ * unmapping anything from the GTT when VT-d is enabled.
+ */
+static bool needs_idle_maps(struct drm_i915_private *i915)
+{
+ /*
+ * Query intel_iommu to see if we need the workaround.
Presumably that
+ * was loaded first.
+ */
+ if (!i915_vtd_active(i915))
+ return false;
+
+ if (GRAPHICS_VER(i915) == 5 && IS_MOBILE(i915))
+ return true;
+
+ if (GRAPHICS_VER(i915) == 12)
+ return true; /* XXX DMAR fault reason 7 */
+
+ return false;
+}
+
+static unsigned int gen6_gttmmadr_size(struct drm_i915_private *i915)
+{
+ /*
+ * GEN6: GTTMMADR size is 4MB and GTTADR starts at 2MB offset
+ * GEN8: GTTMMADR size is 16MB and GTTADR starts at 8MB offset
+ */
+ GEM_BUG_ON(GRAPHICS_VER(i915) < 6);
+ return (GRAPHICS_VER(i915) < 8) ? SZ_4M : SZ_16M;
+}
+
+static unsigned int gen6_get_total_gtt_size(u16 snb_gmch_ctl)
+{
+ snb_gmch_ctl >>= SNB_GMCH_GGMS_SHIFT;
+ snb_gmch_ctl &= SNB_GMCH_GGMS_MASK;
+ return snb_gmch_ctl << 20;
+}
+
+static unsigned int gen8_get_total_gtt_size(u16 bdw_gmch_ctl)
+{
+ bdw_gmch_ctl >>= BDW_GMCH_GGMS_SHIFT;
+ bdw_gmch_ctl &= BDW_GMCH_GGMS_MASK;
+ if (bdw_gmch_ctl)
+ bdw_gmch_ctl = 1 << bdw_gmch_ctl;
+
+#ifdef CONFIG_X86_32
+ /* Limit 32b platforms to a 2GB GGTT: 4 << 20 / pte size *
I915_GTT_PAGE_SIZE */
+ if (bdw_gmch_ctl > 4)
+ bdw_gmch_ctl = 4;
+#endif
+
+ return bdw_gmch_ctl << 20;
+}
+
+static unsigned int gen6_gttadr_offset(struct drm_i915_private *i915)
+{
+ return gen6_gttmmadr_size(i915) / 2;
+}
+
+static int ggtt_probe_common(struct i915_ggtt *ggtt, u64 size)
+{
+ struct drm_i915_private *i915 = ggtt->vm.i915;
+ struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
+ phys_addr_t phys_addr;
+ u32 pte_flags;
+ int ret;
+
+ GEM_WARN_ON(pci_resource_len(pdev, 0) != gen6_gttmmadr_size(i915));
+ phys_addr = pci_resource_start(pdev, 0) + gen6_gttadr_offset(i915);
+
+ /*
+ * On BXT+/ICL+ writes larger than 64 bit to the GTT
pagetable range
+ * will be dropped. For WC mappings in general we have 64
byte burst
+ * writes when the WC buffer is flushed, so we can't use it,
but have to
+ * resort to an uncached mapping. The WC issue is easily
caught by the
+ * readback check when writing GTT PTE entries.
+ */
+ if (IS_GEN9_LP(i915) || GRAPHICS_VER(i915) >= 11)
+ ggtt->gsm = ioremap(phys_addr, size);
+ else
+ ggtt->gsm = ioremap_wc(phys_addr, size);
+ if (!ggtt->gsm) {
+ drm_err(&i915->drm, "Failed to map the ggtt page table\n");
+ return -ENOMEM;
+ }
+
+ kref_init(&ggtt->vm.resv_ref);
+ ret = setup_scratch_page(&ggtt->vm);
+ if (ret) {
+ drm_err(&i915->drm, "Scratch setup failed\n");
+ /* iounmap will also get called at remove, but meh */
+ iounmap(ggtt->gsm);
+ return ret;
+ }
+
+ pte_flags = 0;
+ if (i915_gem_object_is_lmem(ggtt->vm.scratch[0]))
+ pte_flags |= PTE_LM;
+
+ ggtt->vm.scratch[0]->encode =
+ ggtt->vm.pte_encode(px_dma(ggtt->vm.scratch[0]),
+ I915_CACHE_NONE, pte_flags);
+
+ return 0;
+}
+
+int intel_gt_gmch_gen5_probe(struct i915_ggtt *ggtt)
+{
+ struct drm_i915_private *i915 = ggtt->vm.i915;
+ phys_addr_t gmadr_base;
+ int ret;
+
+ ret = intel_gmch_probe(i915->bridge_dev,
to_pci_dev(i915->drm.dev), NULL);
+ if (!ret) {
+ drm_err(&i915->drm, "failed to set up gmch\n");
+ return -EIO;
+ }
+
+ intel_gtt_get(&ggtt->vm.total, &gmadr_base, &ggtt->mappable_end);
+
+ ggtt->gmadr =
+ (struct resource)DEFINE_RES_MEM(gmadr_base,
ggtt->mappable_end);
+
+ ggtt->vm.alloc_pt_dma = alloc_pt_dma;
+ ggtt->vm.alloc_scratch_dma = alloc_pt_dma;
+
+ if (needs_idle_maps(i915)) {
+ drm_notice(&i915->drm,
+ "Flushing DMA requests before IOMMU unmaps;
performance may be degraded\n");
+ ggtt->do_idle_maps = true;
+ }
+
+ ggtt->vm.insert_page = gen5_ggtt_insert_page;
+ ggtt->vm.insert_entries = gen5_ggtt_insert_entries;
+ ggtt->vm.clear_range = gen5_ggtt_clear_range;
+ ggtt->vm.cleanup = gen5_gmch_remove;
+
+ ggtt->invalidate = gmch_ggtt_invalidate;
+
+ ggtt->vm.vma_ops.bind_vma = intel_ggtt_bind_vma;
+ ggtt->vm.vma_ops.unbind_vma = intel_ggtt_unbind_vma;
+
+ if (unlikely(ggtt->do_idle_maps))
+ drm_notice(&i915->drm,
+ "Applying Ironlake quirks for intel_iommu\n");
+
+ return 0;
+}
+
+int intel_gt_gmch_gen6_probe(struct i915_ggtt *ggtt)
+{
+ struct drm_i915_private *i915 = ggtt->vm.i915;
+ struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
+ unsigned int size;
+ u16 snb_gmch_ctl;
+
+ ggtt->gmadr = intel_pci_resource(pdev, 2);
+ ggtt->mappable_end = resource_size(&ggtt->gmadr);
+
+ /*
+ * 64/512MB is the current min/max we actually know of, but this is
+ * just a coarse sanity check.
+ */
+ if (ggtt->mappable_end < (64<<20) || ggtt->mappable_end >
(512<<20)) {
+ drm_err(&i915->drm, "Unknown GMADR size (%pa)\n",
+ &ggtt->mappable_end);
+ return -ENXIO;
+ }
+
+ pci_read_config_word(pdev, SNB_GMCH_CTRL, &snb_gmch_ctl);
+
+ size = gen6_get_total_gtt_size(snb_gmch_ctl);
+ ggtt->vm.total = (size / sizeof(gen6_pte_t)) * I915_GTT_PAGE_SIZE;
+
+ ggtt->vm.alloc_pt_dma = alloc_pt_dma;
+ ggtt->vm.alloc_scratch_dma = alloc_pt_dma;
+
+ ggtt->vm.clear_range = nop_clear_range;
+ if (!HAS_FULL_PPGTT(i915) || intel_scanout_needs_vtd_wa(i915))
+ ggtt->vm.clear_range = gen6_ggtt_clear_range;
+ ggtt->vm.insert_page = gen6_ggtt_insert_page;
+ ggtt->vm.insert_entries = gen6_ggtt_insert_entries;
+ ggtt->vm.cleanup = gen6_gmch_remove;
+
+ ggtt->invalidate = gen6_ggtt_invalidate;
+
+ if (HAS_EDRAM(i915))
+ ggtt->vm.pte_encode = iris_pte_encode;
+ else if (IS_HASWELL(i915))
+ ggtt->vm.pte_encode = hsw_pte_encode;
+ else if (IS_VALLEYVIEW(i915))
+ ggtt->vm.pte_encode = byt_pte_encode;
+ else if (GRAPHICS_VER(i915) >= 7)
+ ggtt->vm.pte_encode = ivb_pte_encode;
+ else
+ ggtt->vm.pte_encode = snb_pte_encode;
+
+ ggtt->vm.vma_ops.bind_vma = intel_ggtt_bind_vma;
+ ggtt->vm.vma_ops.unbind_vma = intel_ggtt_unbind_vma;
+
+ return ggtt_probe_common(ggtt, size);
+}
+
+static unsigned int chv_get_total_gtt_size(u16 gmch_ctrl)
+{
+ gmch_ctrl >>= SNB_GMCH_GGMS_SHIFT;
+ gmch_ctrl &= SNB_GMCH_GGMS_MASK;
+
+ if (gmch_ctrl)
+ return 1 << (20 + gmch_ctrl);
+
+ return 0;
+}
+
+int intel_gt_gmch_gen8_probe(struct i915_ggtt *ggtt)
+{
+ struct drm_i915_private *i915 = ggtt->vm.i915;
+ struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
+ unsigned int size;
+ u16 snb_gmch_ctl;
+
+ /* TODO: We're not aware of mappable constraints on gen8 yet */
+ if (!HAS_LMEM(i915)) {
+ ggtt->gmadr = intel_pci_resource(pdev, 2);
+ ggtt->mappable_end = resource_size(&ggtt->gmadr);
+ }
+
+ pci_read_config_word(pdev, SNB_GMCH_CTRL, &snb_gmch_ctl);
+ if (IS_CHERRYVIEW(i915))
+ size = chv_get_total_gtt_size(snb_gmch_ctl);
+ else
+ size = gen8_get_total_gtt_size(snb_gmch_ctl);
+
+ ggtt->vm.alloc_pt_dma = alloc_pt_dma;
+ ggtt->vm.alloc_scratch_dma = alloc_pt_dma;
+ ggtt->vm.lmem_pt_obj_flags = I915_BO_ALLOC_PM_EARLY;
+
+ ggtt->vm.total = (size / sizeof(gen8_pte_t)) * I915_GTT_PAGE_SIZE;
+ ggtt->vm.cleanup = gen6_gmch_remove;
+ ggtt->vm.insert_page = gen8_ggtt_insert_page;
+ ggtt->vm.clear_range = nop_clear_range;
+ if (intel_scanout_needs_vtd_wa(i915))
+ ggtt->vm.clear_range = gen8_ggtt_clear_range;
+
+ ggtt->vm.insert_entries = gen8_ggtt_insert_entries;
+
+ /*
+ * Serialize GTT updates with aperture access on BXT if VT-d is on,
+ * and always on CHV.
+ */
+ if (intel_vm_no_concurrent_access_wa(i915)) {
+ ggtt->vm.insert_entries = bxt_vtd_ggtt_insert_entries__BKL;
+ ggtt->vm.insert_page = bxt_vtd_ggtt_insert_page__BKL;
+ ggtt->vm.bind_async_flags =
+ I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND;
+ }
+
+ ggtt->invalidate = gen8_ggtt_invalidate;
+
+ ggtt->vm.vma_ops.bind_vma = intel_ggtt_bind_vma;
+ ggtt->vm.vma_ops.unbind_vma = intel_ggtt_unbind_vma;
+
+ ggtt->vm.pte_encode = gen8_ggtt_pte_encode;
+
+ setup_private_pat(ggtt->vm.gt->uncore);
+
+ return ggtt_probe_common(ggtt, size);
+}
+
+int intel_gt_gmch_gen5_enable_hw(struct drm_i915_private *i915)
+{
+ if (GRAPHICS_VER(i915) < 6 && !intel_enable_gtt())
+ return -EIO;
+
+ return 0;
+}
diff --git a/drivers/gpu/drm/i915/gt/intel_gt_gmch.h
b/drivers/gpu/drm/i915/gt/intel_gt_gmch.h
new file mode 100644
index 000000000000..75ed55c1f30a
--- /dev/null
+++ b/drivers/gpu/drm/i915/gt/intel_gt_gmch.h
@@ -0,0 +1,46 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2022 Intel Corporation
+ */
+
+#ifndef __INTEL_GT_GMCH_H__
+#define __INTEL_GT_GMCH_H__
+
+#include "intel_gtt.h"
+
+/* For x86 platforms */
+#if IS_ENABLED(CONFIG_X86)
+void intel_gt_gmch_gen5_chipset_flush(struct intel_gt *gt);
+int intel_gt_gmch_gen6_probe(struct i915_ggtt *ggtt);
+int intel_gt_gmch_gen8_probe(struct i915_ggtt *ggtt);
+int intel_gt_gmch_gen5_probe(struct i915_ggtt *ggtt);
+int intel_gt_gmch_gen5_enable_hw(struct drm_i915_private *i915);
+
+/* Stubs for non-x86 platforms */
+#else
+static inline void intel_gt_gmch_gen5_chipset_flush(struct
intel_gt *gt)
+{
+}
+static inline int intel_gt_gmch_gen5_probe(struct i915_ggtt *ggtt)
+{
+ /* No HW should be probed for this case yet, return fail */
+ return -ENODEV;
+}
+static inline int intel_gt_gmch_gen6_probe(struct i915_ggtt *ggtt)
+{
+ /* No HW should be probed for this case yet, return fail */
+ return -ENODEV;
+}
+static inline int intel_gt_gmch_gen8_probe(struct i915_ggtt *ggtt)
+{
+ /* No HW should be probed for this case yet, return fail */
+ return -ENODEV;
+}
+static inline int intel_gt_gmch_gen5_enable_hw(struct
drm_i915_private *i915)
+{
+ /* No HW should be enabled for this case yet, return fail */
+ return -ENODEV;
+}
+#endif
+
+#endif /* __INTEL_GT_GMCH_H__ */
diff --git a/drivers/gpu/drm/i915/gt/intel_gtt.h
b/drivers/gpu/drm/i915/gt/intel_gtt.h
index 5922e2cf4d8d..a40d928b3888 100644
--- a/drivers/gpu/drm/i915/gt/intel_gtt.h
+++ b/drivers/gpu/drm/i915/gt/intel_gtt.h
@@ -549,6 +549,14 @@ i915_page_dir_dma_addr(const struct
i915_ppgtt *ppgtt, const unsigned int n)
void ppgtt_init(struct i915_ppgtt *ppgtt, struct intel_gt *gt,
unsigned long lmem_pt_obj_flags);
+void intel_ggtt_bind_vma(struct i915_address_space *vm,
+ struct i915_vm_pt_stash *stash,
+ struct i915_vma_resource *vma_res,
+ enum i915_cache_level cache_level,
+ u32 flags);
+void intel_ggtt_unbind_vma(struct i915_address_space *vm,
+ struct i915_vma_resource *vma_res);
+
int i915_ggtt_probe_hw(struct drm_i915_private *i915);
int i915_ggtt_init_hw(struct drm_i915_private *i915);
int i915_ggtt_enable_hw(struct drm_i915_private *i915);
@@ -619,6 +627,7 @@ release_pd_entry(struct i915_page_directory *
const pd,
struct i915_page_table * const pt,
const struct drm_i915_gem_object * const scratch);
void gen6_ggtt_invalidate(struct i915_ggtt *ggtt);
+void gen8_ggtt_invalidate(struct i915_ggtt *ggtt);
void ppgtt_bind_vma(struct i915_address_space *vm,
struct i915_vm_pt_stash *stash,
