550.40.07

kernel-open/nvidia-drm/nvidia-drm-os-interface.c

@@ -0,0 +1,285 @@
+/*
+ * Copyright (c) 2015-2023, NVIDIA CORPORATION. All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <linux/slab.h>
+
+#include "nvidia-drm-os-interface.h"
+
+#if defined(NV_DRM_AVAILABLE)
+
+#if defined(NV_LINUX_SYNC_FILE_H_PRESENT)
+#include <linux/file.h>
+#include <linux/sync_file.h>
+#endif
+
+#include <linux/vmalloc.h>
+#include <linux/sched.h>
+#include <linux/device.h>
+
+#include "nv-mm.h"
+
+#if defined(NV_DRM_DRMP_H_PRESENT)
+#include <drm/drmP.h>
+#endif
+
+bool nv_drm_modeset_module_param = false;
+bool nv_drm_fbdev_module_param = false;
+
+void *nv_drm_calloc(size_t nmemb, size_t size)
+{
+    size_t total_size = nmemb * size;
+    //
+    // Check for overflow.
+    //
+    if ((nmemb != 0) && ((total_size / nmemb) != size))
+    {
+        return NULL;
+    }
+    return kzalloc(nmemb * size, GFP_KERNEL);
+}
+
+void nv_drm_free(void *ptr)
+{
+    if (IS_ERR(ptr)) {
+        return;
+    }
+
+    kfree(ptr);
+}
+
+char *nv_drm_asprintf(const char *fmt, ...)
+{
+    va_list ap;
+    char *p;
+
+    va_start(ap, fmt);
+    p = kvasprintf(GFP_KERNEL, fmt, ap);
+    va_end(ap);
+
+    return p;
+}
+
+#if defined(NVCPU_X86) || defined(NVCPU_X86_64)
+  #define WRITE_COMBINE_FLUSH()    asm volatile("sfence":::"memory")
+#elif defined(NVCPU_PPC64LE)
+  #define WRITE_COMBINE_FLUSH()    asm volatile("sync":::"memory")
+#else
+  #define WRITE_COMBINE_FLUSH()    mb()
+#endif
+
+void nv_drm_write_combine_flush(void)
+{
+    WRITE_COMBINE_FLUSH();
+}
+
+int nv_drm_lock_user_pages(unsigned long address,
+                           unsigned long pages_count, struct page ***pages)
+{
+    struct mm_struct *mm = current->mm;
+    struct page **user_pages;
+    int pages_pinned;
+
+    user_pages = nv_drm_calloc(pages_count, sizeof(*user_pages));
+
+    if (user_pages == NULL) {
+        return -ENOMEM;
+    }
+
+    nv_mmap_read_lock(mm);
+
+    pages_pinned = NV_PIN_USER_PAGES(address, pages_count, FOLL_WRITE,
+                                     user_pages);
+    nv_mmap_read_unlock(mm);
+
+    if (pages_pinned < 0 || (unsigned)pages_pinned < pages_count) {
+        goto failed;
+    }
+
+    *pages = user_pages;
+
+    return 0;
+
+failed:
+
+    if (pages_pinned > 0) {
+        int i;
+
+        for (i = 0; i < pages_pinned; i++) {
+           NV_UNPIN_USER_PAGE(user_pages[i]);
+        }
+    }
+
+    nv_drm_free(user_pages);
+
+    return (pages_pinned < 0) ? pages_pinned : -EINVAL;
+}
+
+void nv_drm_unlock_user_pages(unsigned long  pages_count, struct page **pages)
+{
+    unsigned long i;
+
+    for (i = 0; i < pages_count; i++) {
+        set_page_dirty_lock(pages[i]);
+        NV_UNPIN_USER_PAGE(pages[i]);
+    }
+
+    nv_drm_free(pages);
+}
+
+/*
+ * linuxkpi vmap doesn't use the flags argument as it
+ * doesn't seem to be needed. Define VM_USERMAP to 0
+ * to make errors go away
+ *
+ * vmap: sys/compat/linuxkpi/common/src/linux_compat.c
+ */
+#if defined(NV_BSD)
+#define VM_USERMAP 0
+#endif
+
+void *nv_drm_vmap(struct page **pages, unsigned long pages_count)
+{
+    return vmap(pages, pages_count, VM_USERMAP, PAGE_KERNEL);
+}
+
+void nv_drm_vunmap(void *address)
+{
+    vunmap(address);
+}
+
+bool nv_drm_workthread_init(nv_drm_workthread *worker, const char *name)
+{
+    worker->shutting_down = false;
+    if (nv_kthread_q_init(&worker->q, name)) {
+        return false;
+    }
+
+    spin_lock_init(&worker->lock);
+
+    return true;
+}
+
+void nv_drm_workthread_shutdown(nv_drm_workthread *worker)
+{
+    unsigned long flags;
+
+    spin_lock_irqsave(&worker->lock, flags);
+    worker->shutting_down = true;
+    spin_unlock_irqrestore(&worker->lock, flags);
+
+    nv_kthread_q_stop(&worker->q);
+}
+
+void nv_drm_workthread_work_init(nv_drm_work *work,
+                                 void (*callback)(void *),
+                                 void *arg)
+{
+    nv_kthread_q_item_init(work, callback, arg);
+}
+
+int nv_drm_workthread_add_work(nv_drm_workthread *worker, nv_drm_work *work)
+{
+    unsigned long flags;
+    int ret = 0;
+
+    spin_lock_irqsave(&worker->lock, flags);
+    if (!worker->shutting_down) {
+        ret = nv_kthread_q_schedule_q_item(&worker->q, work);
+    }
+    spin_unlock_irqrestore(&worker->lock, flags);
+
+    return ret;
+}
+
+void nv_drm_timer_setup(nv_drm_timer *timer, void (*callback)(nv_drm_timer *nv_drm_timer))
+{
+    nv_timer_setup(timer, callback);
+}
+
+void nv_drm_mod_timer(nv_drm_timer *timer, unsigned long timeout_native)
+{
+    mod_timer(&timer->kernel_timer, timeout_native);
+}
+
+unsigned long nv_drm_timer_now(void)
+{
+    return jiffies;
+}
+
+unsigned long nv_drm_timeout_from_ms(NvU64 relative_timeout_ms)
+{
+    return jiffies + msecs_to_jiffies(relative_timeout_ms);
+}
+
+bool nv_drm_del_timer_sync(nv_drm_timer *timer)
+{
+    if (del_timer_sync(&timer->kernel_timer)) {
+        return true;
+    } else {
+        return false;
+    }
+}
+
+#if defined(NV_DRM_FENCE_AVAILABLE)
+int nv_drm_create_sync_file(nv_dma_fence_t *fence)
+{
+#if defined(NV_LINUX_SYNC_FILE_H_PRESENT)
+    struct sync_file *sync;
+    int fd = get_unused_fd_flags(O_CLOEXEC);
+
+    if (fd < 0) {
+        return fd;
+    }
+
+    /* sync_file_create() generates its own reference to the fence */
+    sync = sync_file_create(fence);
+
+    if (IS_ERR(sync)) {
+        put_unused_fd(fd);
+        return PTR_ERR(sync);
+    }
+
+    fd_install(fd, sync->file);
+
+    return fd;
+#else /* defined(NV_LINUX_SYNC_FILE_H_PRESENT) */
+    return -EINVAL;
+#endif  /* defined(NV_LINUX_SYNC_FILE_H_PRESENT) */
+}
+
+nv_dma_fence_t *nv_drm_sync_file_get_fence(int fd)
+{
+#if defined(NV_SYNC_FILE_GET_FENCE_PRESENT)
+    return sync_file_get_fence(fd);
+#else /* defined(NV_SYNC_FILE_GET_FENCE_PRESENT) */
+    return NULL;
+#endif  /* defined(NV_SYNC_FILE_GET_FENCE_PRESENT) */
+}
+#endif /* defined(NV_DRM_FENCE_AVAILABLE) */
+
+void nv_drm_yield(void)
+{
+    set_current_state(TASK_INTERRUPTIBLE);
+    schedule_timeout(1);
+}
+
+#endif /* NV_DRM_AVAILABLE */