^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * \file drm_dma.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * DMA IOCTL and function support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * \author Rickard E. (Rik) Faith <faith@valinux.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * \author Gareth Hughes <gareth@valinux.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * Created: Fri Mar 19 14:30:16 1999 by faith@valinux.com
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * All Rights Reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * Permission is hereby granted, free of charge, to any person obtaining a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * copy of this software and associated documentation files (the "Software"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * to deal in the Software without restriction, including without limitation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * the rights to use, copy, modify, merge, publish, distribute, sublicense,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * and/or sell copies of the Software, and to permit persons to whom the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * Software is furnished to do so, subject to the following conditions:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * The above copyright notice and this permission notice (including the next
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * paragraph) shall be included in all copies or substantial portions of the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * Software.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * OTHER DEALINGS IN THE SOFTWARE.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #include <linux/pci.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #include <drm/drm_drv.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #include <drm/drm_print.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #include "drm_legacy.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) * drm_legacy_dma_setup() - Initialize the DMA data.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) * @dev: DRM device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) * Return: zero on success or a negative value on failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) * Allocate and initialize a drm_device_dma structure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) int drm_legacy_dma_setup(struct drm_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) !drm_core_check_feature(dev, DRIVER_LEGACY))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) dev->buf_use = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) atomic_set(&dev->buf_alloc, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) dev->dma = kzalloc(sizeof(*dev->dma), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) if (!dev->dma)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) for (i = 0; i <= DRM_MAX_ORDER; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) memset(&dev->dma->bufs[i], 0, sizeof(dev->dma->bufs[0]));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) * drm_legacy_dma_takedown() - Cleanup the DMA resources.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) * @dev: DRM device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) * Free all pages associated with DMA buffers, the buffers and pages lists, and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) * finally the drm_device::dma structure itself.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) void drm_legacy_dma_takedown(struct drm_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) struct drm_device_dma *dma = dev->dma;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) int i, j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) !drm_core_check_feature(dev, DRIVER_LEGACY))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) if (!dma)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) /* Clear dma buffers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) for (i = 0; i <= DRM_MAX_ORDER; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) if (dma->bufs[i].seg_count) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) DRM_DEBUG("order %d: buf_count = %d,"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) " seg_count = %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) i,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) dma->bufs[i].buf_count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) dma->bufs[i].seg_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) for (j = 0; j < dma->bufs[i].seg_count; j++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) if (dma->bufs[i].seglist[j]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) drm_pci_free(dev, dma->bufs[i].seglist[j]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) kfree(dma->bufs[i].seglist);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) if (dma->bufs[i].buf_count) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) for (j = 0; j < dma->bufs[i].buf_count; j++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) kfree(dma->bufs[i].buflist[j].dev_private);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) kfree(dma->bufs[i].buflist);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) kfree(dma->buflist);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) kfree(dma->pagelist);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) kfree(dev->dma);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) dev->dma = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) * drm_legacy_free_buffer() - Free a buffer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) * @dev: DRM device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) * @buf: buffer to free.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) * Resets the fields of \p buf.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) void drm_legacy_free_buffer(struct drm_device *dev, struct drm_buf * buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) if (!buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) buf->waiting = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) buf->pending = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) buf->file_priv = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) buf->used = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) * drm_legacy_reclaim_buffers() - Reclaim the buffers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) * @dev: DRM device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) * @file_priv: DRM file private.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) * Frees each buffer associated with \p file_priv not already on the hardware.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) void drm_legacy_reclaim_buffers(struct drm_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) struct drm_file *file_priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) struct drm_device_dma *dma = dev->dma;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) if (!dma)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) for (i = 0; i < dma->buf_count; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) if (dma->buflist[i]->file_priv == file_priv) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) switch (dma->buflist[i]->list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) case DRM_LIST_NONE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) drm_legacy_free_buffer(dev, dma->buflist[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) case DRM_LIST_WAIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) dma->buflist[i]->list = DRM_LIST_RECLAIM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) /* Buffer already on hardware. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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