From: CQ Tang cq.tang@intel.com
Add "REGION_STOLEN" device info to dg1, create stolen memory region from upper portion of local device memory, starting from DSMBASE.
The memory region is marked with "is_devmem=true".
Cc: Joonas Lahtinen joonas.lahtinen@linux.intel.com Cc: Matthew Auld matthew.auld@intel.com Cc: Abdiel Janulgue abdiel.janulgue@linux.intel.com Cc: Chris P Wilson chris.p.wilson@intel.com Cc: Balestrieri, Francesco francesco.balestrieri@intel.com Cc: Niranjana Vishwanathapura niranjana.vishwanathapura@intel.com Cc: Venkata S Dhanalakota venkata.s.dhanalakota@intel.com Cc: Neel Desai neel.desai@intel.com Cc: Matthew Brost matthew.brost@intel.com Cc: Sudeep Dutt sudeep.dutt@intel.com Signed-off-by: CQ Tang cq.tang@intel.com Cc: Lucas De Marchi lucas.demarchi@intel.com --- drivers/gpu/drm/i915/gem/i915_gem_lmem.c | 4 +- drivers/gpu/drm/i915/gem/i915_gem_lmem.h | 7 +++ drivers/gpu/drm/i915/gem/i915_gem_stolen.c | 56 +++++++++++++++++++++- drivers/gpu/drm/i915/i915_pci.c | 2 +- drivers/gpu/drm/i915/i915_reg.h | 1 + drivers/gpu/drm/i915/intel_memory_region.c | 5 ++ drivers/gpu/drm/i915/intel_memory_region.h | 2 +- 7 files changed, 71 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_lmem.c b/drivers/gpu/drm/i915/gem/i915_gem_lmem.c index 71c07e1f6f26..b2fd2bc862c0 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_lmem.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_lmem.c @@ -111,8 +111,8 @@ int i915_gem_object_lmem_pread(struct drm_i915_gem_object *obj, return ret; }
-static int i915_gem_object_lmem_pwrite(struct drm_i915_gem_object *obj, - const struct drm_i915_gem_pwrite *arg) +int i915_gem_object_lmem_pwrite(struct drm_i915_gem_object *obj, + const struct drm_i915_gem_pwrite *arg) { struct drm_i915_private *i915 = to_i915(obj->base.dev); struct intel_runtime_pm *rpm = &i915->runtime_pm; diff --git a/drivers/gpu/drm/i915/gem/i915_gem_lmem.h b/drivers/gpu/drm/i915/gem/i915_gem_lmem.h index e11e0545e39c..c59aa6c014c7 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_lmem.h +++ b/drivers/gpu/drm/i915/gem/i915_gem_lmem.h @@ -11,9 +11,16 @@ struct drm_i915_private; struct drm_i915_gem_object; struct intel_memory_region; +struct drm_i915_gem_pread; +struct drm_i915_gem_pwrite;
extern const struct drm_i915_gem_object_ops i915_gem_lmem_obj_ops;
+int i915_gem_object_lmem_pread(struct drm_i915_gem_object *obj, + const struct drm_i915_gem_pread *args); +int i915_gem_object_lmem_pwrite(struct drm_i915_gem_object *obj, + const struct drm_i915_gem_pwrite *args); + void __iomem * i915_gem_object_lmem_io_map(struct drm_i915_gem_object *obj, unsigned long n, diff --git a/drivers/gpu/drm/i915/gem/i915_gem_stolen.c b/drivers/gpu/drm/i915/gem/i915_gem_stolen.c index 0ddf48e472a0..633745336f40 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_stolen.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_stolen.c @@ -10,6 +10,7 @@ #include <drm/drm_mm.h> #include <drm/i915_drm.h>
+#include "gem/i915_gem_lmem.h" #include "gem/i915_gem_region.h" #include "i915_drv.h" #include "i915_gem_stolen.h" @@ -121,6 +122,14 @@ static int i915_adjust_stolen(struct drm_i915_private *i915, } }
+ /* + * With device local memory, we don't need to check the address range, + * this is device memory physical address, could overlap with system + * memory. + */ + if (HAS_LMEM(i915)) + return 0; + /* * Verify that nothing else uses this physical address. Stolen * memory should be reserved by the BIOS and hidden from the @@ -607,7 +616,7 @@ static void i915_gem_object_put_pages_stolen(struct drm_i915_gem_object *obj, kfree(pages); }
-static const struct drm_i915_gem_object_ops i915_gem_object_stolen_ops = { +static struct drm_i915_gem_object_ops i915_gem_object_stolen_ops = { .name = "i915_gem_object_stolen", .get_pages = i915_gem_object_get_pages_stolen, .put_pages = i915_gem_object_put_pages_stolen, @@ -716,7 +725,19 @@ i915_gem_object_create_stolen(struct drm_i915_private *i915,
static int init_stolen(struct intel_memory_region *mem) { - intel_memory_region_set_name(mem, "stolen"); + if (mem->type == INTEL_MEMORY_STOLEN_SYSTEM) + intel_memory_region_set_name(mem, "stolen-system"); + else + intel_memory_region_set_name(mem, "stolen-local"); + + if (HAS_LMEM(mem->i915)) { + i915_gem_object_stolen_ops.pread = i915_gem_object_lmem_pread; + i915_gem_object_stolen_ops.pwrite = i915_gem_object_lmem_pwrite; + if (!io_mapping_init_wc(&mem->iomap, + mem->io_start, + resource_size(&mem->region))) + return -EIO; + }
/* * Initialise stolen early so that we may reserve preallocated @@ -736,8 +757,39 @@ static const struct intel_memory_region_ops i915_region_stolen_ops = { .create_object = i915_gem_object_create_stolen_region, };
+static +struct intel_memory_region *setup_lmem_stolen(struct drm_i915_private *i915) +{ + struct intel_uncore *uncore = &i915->uncore; + struct pci_dev *pdev = i915->drm.pdev; + struct intel_memory_region *mem; + resource_size_t io_start; + resource_size_t lmem_size; + u64 lmem_base; + + lmem_base = intel_uncore_read64(uncore, GEN12_DSMBASE); + lmem_size = pci_resource_len(pdev, 2) - lmem_base; + io_start = pci_resource_start(pdev, 2) + lmem_base; + + mem = intel_memory_region_create(i915, lmem_base, lmem_size, + I915_GTT_PAGE_SIZE_4K, io_start, + &i915_region_stolen_ops); + if (!IS_ERR(mem)) { + DRM_INFO("Intel graphics stolen LMEM: %pR\n", &mem->region); + DRM_INFO("Intel graphics stolen LMEM IO start: %llx\n", + (u64)mem->io_start); + /* this is real device memory */ + mem->is_devmem = true; + } + + return mem; +} + struct intel_memory_region *i915_gem_stolen_setup(struct drm_i915_private *i915) { + if (HAS_LMEM(i915)) + return setup_lmem_stolen(i915); + return intel_memory_region_create(i915, intel_graphics_stolen_res.start, resource_size(&intel_graphics_stolen_res), diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c index 8243178a56f9..c3d9b36ef651 100644 --- a/drivers/gpu/drm/i915/i915_pci.c +++ b/drivers/gpu/drm/i915/i915_pci.c @@ -907,7 +907,7 @@ static const struct intel_device_info rkl_info = {
#define GEN12_DGFX_FEATURES \ GEN12_FEATURES, \ - .memory_regions = REGION_SMEM | REGION_LMEM, \ + .memory_regions = REGION_SMEM | REGION_LMEM | REGION_STOLEN_LMEM, \ .has_master_unit_irq = 1, \ .has_llc = 0, \ .has_snoop = 1, \ diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 0e01ea0cb0a4..3c8350f108e4 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -12067,6 +12067,7 @@ enum skl_power_gate { #define LMEM_ENABLE (1 << 31)
#define GEN12_GSMBASE _MMIO(0x108100) +#define GEN12_DSMBASE _MMIO(0x1080C0)
/* gamt regs */ #define GEN8_L3_LRA_1_GPGPU _MMIO(0x4dd4) diff --git a/drivers/gpu/drm/i915/intel_memory_region.c b/drivers/gpu/drm/i915/intel_memory_region.c index 043541d409bd..c7a1d84e7ee8 100644 --- a/drivers/gpu/drm/i915/intel_memory_region.c +++ b/drivers/gpu/drm/i915/intel_memory_region.c @@ -19,6 +19,10 @@ const struct intel_memory_region_info intel_region_map[] = { .class = INTEL_MEMORY_STOLEN_SYSTEM, .instance = 0, }, + [INTEL_REGION_STOLEN_LMEM] = { + .class = INTEL_MEMORY_STOLEN_LOCAL, + .instance = 0, + }, };
struct intel_memory_region * @@ -311,6 +315,7 @@ int intel_memory_regions_hw_probe(struct drm_i915_private *i915) case INTEL_MEMORY_SYSTEM: mem = i915_gem_shmem_setup(i915); break; + case INTEL_MEMORY_STOLEN_LOCAL: /* fallthrough */ case INTEL_MEMORY_STOLEN_SYSTEM: mem = i915_gem_stolen_setup(i915); break; diff --git a/drivers/gpu/drm/i915/intel_memory_region.h b/drivers/gpu/drm/i915/intel_memory_region.h index b7a9e34faaf1..8da82cb2afe3 100644 --- a/drivers/gpu/drm/i915/intel_memory_region.h +++ b/drivers/gpu/drm/i915/intel_memory_region.h @@ -93,7 +93,7 @@ struct intel_memory_region { u16 type; u16 instance; enum intel_region_id id; - char name[8]; + char name[16]; struct intel_gt *gt; /* GT closest to this region. */ bool is_devmem; /* true for device memory */