From 01573e231f18eb2d99162747186f59511f56b64d Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 08 Dec 2023 10:40:48 +0000
Subject: [PATCH] 移去rt
---
kernel/include/drm/ttm/ttm_bo_api.h | 316 +++++++++++++++-------------------------------------
1 files changed, 92 insertions(+), 224 deletions(-)
diff --git a/kernel/include/drm/ttm/ttm_bo_api.h b/kernel/include/drm/ttm/ttm_bo_api.h
index a01ba20..0f7cd21 100644
--- a/kernel/include/drm/ttm/ttm_bo_api.h
+++ b/kernel/include/drm/ttm/ttm_bo_api.h
@@ -31,6 +31,7 @@
#ifndef _TTM_BO_API_H_
#define _TTM_BO_API_H_
+#include <drm/drm_gem.h>
#include <drm/drm_hashtab.h>
#include <drm/drm_vma_manager.h>
#include <linux/kref.h>
@@ -39,7 +40,9 @@
#include <linux/mutex.h>
#include <linux/mm.h>
#include <linux/bitmap.h>
-#include <linux/reservation.h>
+#include <linux/dma-resv.h>
+
+#include "ttm_resource.h"
struct ttm_bo_global;
@@ -51,54 +54,7 @@
struct ttm_place;
-/**
- * struct ttm_bus_placement
- *
- * @addr: mapped virtual address
- * @base: bus base address
- * @is_iomem: is this io memory ?
- * @size: size in byte
- * @offset: offset from the base address
- * @io_reserved_vm: The VM system has a refcount in @io_reserved_count
- * @io_reserved_count: Refcounting the numbers of callers to ttm_mem_io_reserve
- *
- * Structure indicating the bus placement of an object.
- */
-struct ttm_bus_placement {
- void *addr;
- phys_addr_t base;
- unsigned long size;
- unsigned long offset;
- bool is_iomem;
- bool io_reserved_vm;
- uint64_t io_reserved_count;
-};
-
-
-/**
- * struct ttm_mem_reg
- *
- * @mm_node: Memory manager node.
- * @size: Requested size of memory region.
- * @num_pages: Actual size of memory region in pages.
- * @page_alignment: Page alignment.
- * @placement: Placement flags.
- * @bus: Placement on io bus accessible to the CPU
- *
- * Structure indicating the placement and space resources used by a
- * buffer object.
- */
-
-struct ttm_mem_reg {
- void *mm_node;
- unsigned long start;
- unsigned long size;
- unsigned long num_pages;
- uint32_t page_alignment;
- uint32_t mem_type;
- uint32_t placement;
- struct ttm_bus_placement bus;
-};
+struct ttm_lru_bulk_move;
/**
* enum ttm_bo_type
@@ -125,34 +81,28 @@
/**
* struct ttm_buffer_object
*
+ * @base: drm_gem_object superclass data.
* @bdev: Pointer to the buffer object device structure.
* @type: The bo type.
* @destroy: Destruction function. If NULL, kfree is used.
* @num_pages: Actual number of pages.
* @acc_size: Accounted size for this object.
* @kref: Reference count of this buffer object. When this refcount reaches
- * zero, the object is put on the delayed delete list.
- * @list_kref: List reference count of this buffer object. This member is
- * used to avoid destruction while the buffer object is still on a list.
- * Lru lists may keep one refcount, the delayed delete list, and kref != 0
- * keeps one refcount. When this refcount reaches zero,
- * the object is destroyed.
+ * zero, the object is destroyed or put on the delayed delete list.
* @mem: structure describing current placement.
* @persistent_swap_storage: Usually the swap storage is deleted for buffers
* pinned in physical memory. If this behaviour is not desired, this member
* holds a pointer to a persistent shmem object.
* @ttm: TTM structure holding system pages.
* @evicted: Whether the object was evicted without user-space knowing.
- * @cpu_writes: For synchronization. Number of cpu writers.
+ * @deleted: True if the object is only a zombie and already deleted.
* @lru: List head for the lru list.
* @ddestroy: List head for the delayed destroy list.
* @swap: List head for swap LRU list.
* @moving: Fence set when BO is moving
- * @vma_node: Address space manager node.
* @offset: The current GPU offset, which can have different meanings
* depending on the memory type. For SYSTEM type memory, it should be 0.
* @cur_placement: Hint of current placement.
- * @wu_mutex: Wait unreserved mutex.
*
* Base class for TTM buffer object, that deals with data placement and CPU
* mappings. GPU mappings are really up to the driver, but for simpler GPUs
@@ -167,6 +117,8 @@
*/
struct ttm_buffer_object {
+ struct drm_gem_object base;
+
/**
* Members constant at init.
*/
@@ -180,24 +132,16 @@
/**
* Members not needing protection.
*/
-
struct kref kref;
- struct kref list_kref;
/**
* Members protected by the bo::resv::reserved lock.
*/
- struct ttm_mem_reg mem;
+ struct ttm_resource mem;
struct file *persistent_swap_storage;
struct ttm_tt *ttm;
- bool evicted;
-
- /**
- * Members protected by the bo::reserved lock only when written to.
- */
-
- atomic_t cpu_writers;
+ bool deleted;
/**
* Members protected by the bdev::lru_lock.
@@ -206,16 +150,12 @@
struct list_head lru;
struct list_head ddestroy;
struct list_head swap;
- struct list_head io_reserve_lru;
/**
* Members protected by a bo reservation.
*/
struct dma_fence *moving;
-
- struct drm_vma_offset_node vma_node;
-
unsigned priority;
/**
@@ -224,13 +164,7 @@
* either of these locks held.
*/
- uint64_t offset; /* GPU address space is independent of CPU word size */
-
struct sg_table *sg;
-
- struct reservation_object *resv;
- struct reservation_object ttm_resv;
- struct mutex wu_mutex;
};
/**
@@ -273,7 +207,7 @@
struct ttm_operation_ctx {
bool interruptible;
bool no_wait_gpu;
- struct reservation_object *resv;
+ struct dma_resv *resv;
uint64_t bytes_moved;
uint32_t flags;
};
@@ -294,19 +228,20 @@
}
/**
- * ttm_bo_reference - reference a struct ttm_buffer_object
- *
+ * ttm_bo_get_unless_zero - reference a struct ttm_buffer_object unless
+ * its refcount has already reached zero.
* @bo: The buffer object.
*
- * Returns a refcounted pointer to a buffer object.
+ * Used to reference a TTM buffer object in lookups where the object is removed
+ * from the lookup structure during the destructor and for RCU lookups.
*
- * This function is deprecated. Use @ttm_bo_get instead.
+ * Returns: @bo if the referencing was successful, NULL otherwise.
*/
-
-static inline struct ttm_buffer_object *
-ttm_bo_reference(struct ttm_buffer_object *bo)
+static inline __must_check struct ttm_buffer_object *
+ttm_bo_get_unless_zero(struct ttm_buffer_object *bo)
{
- ttm_bo_get(bo);
+ if (!kref_get_unless_zero(&bo->kref))
+ return NULL;
return bo;
}
@@ -330,12 +265,12 @@
* ttm_bo_mem_compat - Check if proposed placement is compatible with a bo
*
* @placement: Return immediately if buffer is busy.
- * @mem: The struct ttm_mem_reg indicating the region where the bo resides
+ * @mem: The struct ttm_resource indicating the region where the bo resides
* @new_flags: Describes compatible placement found
*
* Returns true if the placement is compatible
*/
-bool ttm_bo_mem_compat(struct ttm_placement *placement, struct ttm_mem_reg *mem,
+bool ttm_bo_mem_compat(struct ttm_placement *placement, struct ttm_resource *mem,
uint32_t *new_flags);
/**
@@ -367,50 +302,27 @@
void ttm_bo_put(struct ttm_buffer_object *bo);
/**
- * ttm_bo_unref
- *
- * @bo: The buffer object.
- *
- * Unreference and clear a pointer to a buffer object.
- *
- * This function is deprecated. Use @ttm_bo_put instead.
- */
-void ttm_bo_unref(struct ttm_buffer_object **bo);
-
-/**
- * ttm_bo_add_to_lru
- *
- * @bo: The buffer object.
- *
- * Add this bo to the relevant mem type lru and, if it's backed by
- * system pages (ttms) to the swap list.
- * This function must be called with struct ttm_bo_global::lru_lock held, and
- * is typically called immediately prior to unreserving a bo.
- */
-void ttm_bo_add_to_lru(struct ttm_buffer_object *bo);
-
-/**
- * ttm_bo_del_from_lru
- *
- * @bo: The buffer object.
- *
- * Remove this bo from all lru lists used to lookup and reserve an object.
- * This function must be called with struct ttm_bo_global::lru_lock held,
- * and is usually called just immediately after the bo has been reserved to
- * avoid recursive reservation from lru lists.
- */
-void ttm_bo_del_from_lru(struct ttm_buffer_object *bo);
-
-/**
* ttm_bo_move_to_lru_tail
*
* @bo: The buffer object.
+ * @bulk: optional bulk move structure to remember BO positions
*
* Move this BO to the tail of all lru lists used to lookup and reserve an
* object. This function must be called with struct ttm_bo_global::lru_lock
* held, and is used to make a BO less likely to be considered for eviction.
*/
-void ttm_bo_move_to_lru_tail(struct ttm_buffer_object *bo);
+void ttm_bo_move_to_lru_tail(struct ttm_buffer_object *bo,
+ struct ttm_lru_bulk_move *bulk);
+
+/**
+ * ttm_bo_bulk_move_lru_tail
+ *
+ * @bulk: bulk move structure
+ *
+ * Bulk move BOs to the LRU tail, only valid to use when driver makes sure that
+ * BO order never changes. Should be called with ttm_bo_global::lru_lock held.
+ */
+void ttm_bo_bulk_move_lru_tail(struct ttm_lru_bulk_move *bulk);
/**
* ttm_bo_lock_delayed_workqueue
@@ -439,43 +351,6 @@
bool ttm_bo_eviction_valuable(struct ttm_buffer_object *bo,
const struct ttm_place *place);
-/**
- * ttm_bo_synccpu_write_grab
- *
- * @bo: The buffer object:
- * @no_wait: Return immediately if buffer is busy.
- *
- * Synchronizes a buffer object for CPU RW access. This means
- * command submission that affects the buffer will return -EBUSY
- * until ttm_bo_synccpu_write_release is called.
- *
- * Returns
- * -EBUSY if the buffer is busy and no_wait is true.
- * -ERESTARTSYS if interrupted by a signal.
- */
-int ttm_bo_synccpu_write_grab(struct ttm_buffer_object *bo, bool no_wait);
-
-/**
- * ttm_bo_synccpu_write_release:
- *
- * @bo : The buffer object.
- *
- * Releases a synccpu lock.
- */
-void ttm_bo_synccpu_write_release(struct ttm_buffer_object *bo);
-
-/**
- * ttm_bo_acc_size
- *
- * @bdev: Pointer to a ttm_bo_device struct.
- * @bo_size: size of the buffer object in byte.
- * @struct_size: size of the structure holding buffer object datas
- *
- * Returns size to account for a buffer object
- */
-size_t ttm_bo_acc_size(struct ttm_bo_device *bdev,
- unsigned long bo_size,
- unsigned struct_size);
size_t ttm_bo_dma_acc_size(struct ttm_bo_device *bdev,
unsigned long bo_size,
unsigned struct_size);
@@ -491,7 +366,7 @@
* @page_alignment: Data alignment in pages.
* @ctx: TTM operation context for memory allocation.
* @acc_size: Accounted size for this object.
- * @resv: Pointer to a reservation_object, or NULL to let ttm allocate one.
+ * @resv: Pointer to a dma_resv, or NULL to let ttm allocate one.
* @destroy: Destroy function. Use NULL for kfree().
*
* This function initializes a pre-allocated struct ttm_buffer_object.
@@ -524,7 +399,7 @@
struct ttm_operation_ctx *ctx,
size_t acc_size,
struct sg_table *sg,
- struct reservation_object *resv,
+ struct dma_resv *resv,
void (*destroy) (struct ttm_buffer_object *));
/**
@@ -543,7 +418,7 @@
* point to the shmem object backing a GEM object if TTM is used to back a
* GEM user interface.
* @acc_size: Accounted size for this object.
- * @resv: Pointer to a reservation_object, or NULL to let ttm allocate one.
+ * @resv: Pointer to a dma_resv, or NULL to let ttm allocate one.
* @destroy: Destroy function. Use NULL for kfree().
*
* This function initializes a pre-allocated struct ttm_buffer_object.
@@ -568,7 +443,7 @@
unsigned long size, enum ttm_bo_type type,
struct ttm_placement *placement,
uint32_t page_alignment, bool interrubtible, size_t acc_size,
- struct sg_table *sg, struct reservation_object *resv,
+ struct sg_table *sg, struct dma_resv *resv,
void (*destroy) (struct ttm_buffer_object *));
/**
@@ -594,52 +469,6 @@
enum ttm_bo_type type, struct ttm_placement *placement,
uint32_t page_alignment, bool interruptible,
struct ttm_buffer_object **p_bo);
-
-/**
- * ttm_bo_init_mm
- *
- * @bdev: Pointer to a ttm_bo_device struct.
- * @mem_type: The memory type.
- * @p_size: size managed area in pages.
- *
- * Initialize a manager for a given memory type.
- * Note: if part of driver firstopen, it must be protected from a
- * potentially racing lastclose.
- * Returns:
- * -EINVAL: invalid size or memory type.
- * -ENOMEM: Not enough memory.
- * May also return driver-specified errors.
- */
-int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type,
- unsigned long p_size);
-
-/**
- * ttm_bo_clean_mm
- *
- * @bdev: Pointer to a ttm_bo_device struct.
- * @mem_type: The memory type.
- *
- * Take down a manager for a given memory type after first walking
- * the LRU list to evict any buffers left alive.
- *
- * Normally, this function is part of lastclose() or unload(), and at that
- * point there shouldn't be any buffers left created by user-space, since
- * there should've been removed by the file descriptor release() method.
- * However, before this function is run, make sure to signal all sync objects,
- * and verify that the delayed delete queue is empty. The driver must also
- * make sure that there are no NO_EVICT buffers present in this memory type
- * when the call is made.
- *
- * If this function is part of a VT switch, the caller must make sure that
- * there are no appications currently validating buffers before this
- * function is called. The caller can do that by first taking the
- * struct ttm_bo_device::ttm_lock in write mode.
- *
- * Returns:
- * -EINVAL: invalid or uninitialized memory type.
- * -EBUSY: There are still buffers left in this memory type.
- */
-int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type);
/**
* ttm_bo_evict_mm
@@ -708,16 +537,14 @@
void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map);
/**
- * ttm_fbdev_mmap - mmap fbdev memory backed by a ttm buffer object.
+ * ttm_bo_mmap_obj - mmap memory backed by a ttm buffer object.
*
* @vma: vma as input from the fbdev mmap method.
- * @bo: The bo backing the address space. The address space will
- * have the same size as the bo, and start at offset 0.
+ * @bo: The bo backing the address space.
*
- * This function is intended to be called by the fbdev mmap method
- * if the fbdev address space is to be backed by a bo.
+ * Maps a buffer object.
*/
-int ttm_fbdev_mmap(struct vm_area_struct *vma, struct ttm_buffer_object *bo);
+int ttm_bo_mmap_obj(struct vm_area_struct *vma, struct ttm_buffer_object *bo);
/**
* ttm_bo_mmap - mmap out of the ttm device address space.
@@ -731,10 +558,6 @@
*/
int ttm_bo_mmap(struct file *filp, struct vm_area_struct *vma,
struct ttm_bo_device *bdev);
-
-void *ttm_kmap_atomic_prot(struct page *page, pgprot_t prot);
-
-void ttm_kunmap_atomic_prot(void *addr, pgprot_t prot);
/**
* ttm_bo_io
@@ -762,6 +585,51 @@
int ttm_bo_swapout(struct ttm_bo_global *glob,
struct ttm_operation_ctx *ctx);
-void ttm_bo_swapout_all(struct ttm_bo_device *bdev);
-int ttm_bo_wait_unreserved(struct ttm_buffer_object *bo);
+void ttm_bo_swapout_all(void);
+
+/**
+ * ttm_bo_uses_embedded_gem_object - check if the given bo uses the
+ * embedded drm_gem_object.
+ *
+ * Most ttm drivers are using gem too, so the embedded
+ * ttm_buffer_object.base will be initialized by the driver (before
+ * calling ttm_bo_init). It is also possible to use ttm without gem
+ * though (vmwgfx does that).
+ *
+ * This helper will figure whenever a given ttm bo is a gem object too
+ * or not.
+ *
+ * @bo: The bo to check.
+ */
+static inline bool ttm_bo_uses_embedded_gem_object(struct ttm_buffer_object *bo)
+{
+ return bo->base.dev != NULL;
+}
+
+int ttm_mem_evict_first(struct ttm_bo_device *bdev,
+ struct ttm_resource_manager *man,
+ const struct ttm_place *place,
+ struct ttm_operation_ctx *ctx,
+ struct ww_acquire_ctx *ticket);
+
+/* Default number of pre-faulted pages in the TTM fault handler */
+#define TTM_BO_VM_NUM_PREFAULT 16
+
+vm_fault_t ttm_bo_vm_reserve(struct ttm_buffer_object *bo,
+ struct vm_fault *vmf);
+
+vm_fault_t ttm_bo_vm_fault_reserved(struct vm_fault *vmf,
+ pgprot_t prot,
+ pgoff_t num_prefault,
+ pgoff_t fault_page_size);
+
+vm_fault_t ttm_bo_vm_fault(struct vm_fault *vmf);
+
+void ttm_bo_vm_open(struct vm_area_struct *vma);
+
+void ttm_bo_vm_close(struct vm_area_struct *vma);
+
+int ttm_bo_vm_access(struct vm_area_struct *vma, unsigned long addr,
+ void *buf, int len, int write);
+
#endif
--
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