mirror of https://gitee.com/openkylin/linux.git
691 lines
17 KiB
C
691 lines
17 KiB
C
/*
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* Copyright 2013 Red Hat Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: Dave Airlie
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* Alon Levy
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*/
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/* QXL cmd/ring handling */
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#include "qxl_drv.h"
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#include "qxl_object.h"
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static int qxl_reap_surface_id(struct qxl_device *qdev, int max_to_reap);
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struct ring {
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struct qxl_ring_header header;
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uint8_t elements[0];
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};
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struct qxl_ring {
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struct ring *ring;
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int element_size;
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int n_elements;
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int prod_notify;
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wait_queue_head_t *push_event;
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spinlock_t lock;
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};
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void qxl_ring_free(struct qxl_ring *ring)
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{
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kfree(ring);
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}
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struct qxl_ring *
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qxl_ring_create(struct qxl_ring_header *header,
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int element_size,
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int n_elements,
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int prod_notify,
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bool set_prod_notify,
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wait_queue_head_t *push_event)
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{
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struct qxl_ring *ring;
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ring = kmalloc(sizeof(*ring), GFP_KERNEL);
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if (!ring)
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return NULL;
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ring->ring = (struct ring *)header;
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ring->element_size = element_size;
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ring->n_elements = n_elements;
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ring->prod_notify = prod_notify;
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ring->push_event = push_event;
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if (set_prod_notify)
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header->notify_on_prod = ring->n_elements;
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spin_lock_init(&ring->lock);
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return ring;
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}
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static int qxl_check_header(struct qxl_ring *ring)
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{
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int ret;
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struct qxl_ring_header *header = &(ring->ring->header);
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unsigned long flags;
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spin_lock_irqsave(&ring->lock, flags);
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ret = header->prod - header->cons < header->num_items;
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if (ret == 0)
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header->notify_on_cons = header->cons + 1;
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spin_unlock_irqrestore(&ring->lock, flags);
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return ret;
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}
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static int qxl_check_idle(struct qxl_ring *ring)
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{
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int ret;
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struct qxl_ring_header *header = &(ring->ring->header);
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unsigned long flags;
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spin_lock_irqsave(&ring->lock, flags);
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ret = header->prod == header->cons;
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spin_unlock_irqrestore(&ring->lock, flags);
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return ret;
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}
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int qxl_ring_push(struct qxl_ring *ring,
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const void *new_elt, bool interruptible)
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{
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struct qxl_ring_header *header = &(ring->ring->header);
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uint8_t *elt;
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int idx, ret;
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unsigned long flags;
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spin_lock_irqsave(&ring->lock, flags);
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if (header->prod - header->cons == header->num_items) {
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header->notify_on_cons = header->cons + 1;
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mb();
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spin_unlock_irqrestore(&ring->lock, flags);
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if (!drm_can_sleep()) {
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while (!qxl_check_header(ring))
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udelay(1);
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} else {
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if (interruptible) {
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ret = wait_event_interruptible(*ring->push_event,
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qxl_check_header(ring));
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if (ret)
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return ret;
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} else {
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wait_event(*ring->push_event,
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qxl_check_header(ring));
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}
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}
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spin_lock_irqsave(&ring->lock, flags);
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}
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idx = header->prod & (ring->n_elements - 1);
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elt = ring->ring->elements + idx * ring->element_size;
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memcpy((void *)elt, new_elt, ring->element_size);
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header->prod++;
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mb();
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if (header->prod == header->notify_on_prod)
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outb(0, ring->prod_notify);
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spin_unlock_irqrestore(&ring->lock, flags);
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return 0;
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}
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static bool qxl_ring_pop(struct qxl_ring *ring,
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void *element)
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{
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volatile struct qxl_ring_header *header = &(ring->ring->header);
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volatile uint8_t *ring_elt;
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int idx;
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unsigned long flags;
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spin_lock_irqsave(&ring->lock, flags);
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if (header->cons == header->prod) {
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header->notify_on_prod = header->cons + 1;
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spin_unlock_irqrestore(&ring->lock, flags);
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return false;
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}
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idx = header->cons & (ring->n_elements - 1);
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ring_elt = ring->ring->elements + idx * ring->element_size;
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memcpy(element, (void *)ring_elt, ring->element_size);
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header->cons++;
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spin_unlock_irqrestore(&ring->lock, flags);
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return true;
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}
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int
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qxl_push_command_ring_release(struct qxl_device *qdev, struct qxl_release *release,
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uint32_t type, bool interruptible)
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{
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struct qxl_command cmd;
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cmd.type = type;
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cmd.data = qxl_bo_physical_address(qdev, release->bos[0], release->release_offset);
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return qxl_ring_push(qdev->command_ring, &cmd, interruptible);
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}
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int
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qxl_push_cursor_ring_release(struct qxl_device *qdev, struct qxl_release *release,
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uint32_t type, bool interruptible)
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{
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struct qxl_command cmd;
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cmd.type = type;
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cmd.data = qxl_bo_physical_address(qdev, release->bos[0], release->release_offset);
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return qxl_ring_push(qdev->cursor_ring, &cmd, interruptible);
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}
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bool qxl_queue_garbage_collect(struct qxl_device *qdev, bool flush)
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{
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if (!qxl_check_idle(qdev->release_ring)) {
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queue_work(qdev->gc_queue, &qdev->gc_work);
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if (flush)
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flush_work(&qdev->gc_work);
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return true;
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}
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return false;
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}
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int qxl_garbage_collect(struct qxl_device *qdev)
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{
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struct qxl_release *release;
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uint64_t id, next_id;
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int i = 0;
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int ret;
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union qxl_release_info *info;
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while (qxl_ring_pop(qdev->release_ring, &id)) {
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QXL_INFO(qdev, "popped %lld\n", id);
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while (id) {
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release = qxl_release_from_id_locked(qdev, id);
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if (release == NULL)
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break;
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ret = qxl_release_reserve(qdev, release, false);
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if (ret) {
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qxl_io_log(qdev, "failed to reserve release on garbage collect %lld\n", id);
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DRM_ERROR("failed to reserve release %lld\n", id);
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}
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info = qxl_release_map(qdev, release);
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next_id = info->next;
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qxl_release_unmap(qdev, release, info);
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qxl_release_unreserve(qdev, release);
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QXL_INFO(qdev, "popped %lld, next %lld\n", id,
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next_id);
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switch (release->type) {
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case QXL_RELEASE_DRAWABLE:
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case QXL_RELEASE_SURFACE_CMD:
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case QXL_RELEASE_CURSOR_CMD:
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break;
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default:
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DRM_ERROR("unexpected release type\n");
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break;
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}
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id = next_id;
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qxl_release_free(qdev, release);
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++i;
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}
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}
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QXL_INFO(qdev, "%s: %lld\n", __func__, i);
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return i;
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}
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int qxl_alloc_bo_reserved(struct qxl_device *qdev, unsigned long size,
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struct qxl_bo **_bo)
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{
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struct qxl_bo *bo;
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int ret;
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ret = qxl_bo_create(qdev, size, false /* not kernel - device */,
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QXL_GEM_DOMAIN_VRAM, NULL, &bo);
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if (ret) {
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DRM_ERROR("failed to allocate VRAM BO\n");
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return ret;
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}
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ret = qxl_bo_reserve(bo, false);
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if (unlikely(ret != 0))
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goto out_unref;
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*_bo = bo;
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return 0;
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out_unref:
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qxl_bo_unref(&bo);
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return 0;
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}
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static int wait_for_io_cmd_user(struct qxl_device *qdev, uint8_t val, long port)
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{
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int irq_num;
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long addr = qdev->io_base + port;
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int ret;
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mutex_lock(&qdev->async_io_mutex);
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irq_num = atomic_read(&qdev->irq_received_io_cmd);
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if (qdev->last_sent_io_cmd > irq_num) {
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ret = wait_event_interruptible(qdev->io_cmd_event,
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atomic_read(&qdev->irq_received_io_cmd) > irq_num);
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if (ret)
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goto out;
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irq_num = atomic_read(&qdev->irq_received_io_cmd);
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}
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outb(val, addr);
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qdev->last_sent_io_cmd = irq_num + 1;
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ret = wait_event_interruptible(qdev->io_cmd_event,
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atomic_read(&qdev->irq_received_io_cmd) > irq_num);
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out:
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mutex_unlock(&qdev->async_io_mutex);
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return ret;
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}
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static void wait_for_io_cmd(struct qxl_device *qdev, uint8_t val, long port)
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{
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int ret;
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restart:
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ret = wait_for_io_cmd_user(qdev, val, port);
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if (ret == -ERESTARTSYS)
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goto restart;
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}
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int qxl_io_update_area(struct qxl_device *qdev, struct qxl_bo *surf,
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const struct qxl_rect *area)
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{
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int surface_id;
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uint32_t surface_width, surface_height;
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int ret;
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if (!surf->hw_surf_alloc)
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DRM_ERROR("got io update area with no hw surface\n");
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if (surf->is_primary)
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surface_id = 0;
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else
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surface_id = surf->surface_id;
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surface_width = surf->surf.width;
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surface_height = surf->surf.height;
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if (area->left < 0 || area->top < 0 ||
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area->right > surface_width || area->bottom > surface_height) {
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qxl_io_log(qdev, "%s: not doing area update for "
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"%d, (%d,%d,%d,%d) (%d,%d)\n", __func__, surface_id, area->left,
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area->top, area->right, area->bottom, surface_width, surface_height);
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return -EINVAL;
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}
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mutex_lock(&qdev->update_area_mutex);
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qdev->ram_header->update_area = *area;
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qdev->ram_header->update_surface = surface_id;
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ret = wait_for_io_cmd_user(qdev, 0, QXL_IO_UPDATE_AREA_ASYNC);
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mutex_unlock(&qdev->update_area_mutex);
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return ret;
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}
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void qxl_io_notify_oom(struct qxl_device *qdev)
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{
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outb(0, qdev->io_base + QXL_IO_NOTIFY_OOM);
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}
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void qxl_io_flush_release(struct qxl_device *qdev)
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{
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outb(0, qdev->io_base + QXL_IO_FLUSH_RELEASE);
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}
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void qxl_io_flush_surfaces(struct qxl_device *qdev)
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{
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wait_for_io_cmd(qdev, 0, QXL_IO_FLUSH_SURFACES_ASYNC);
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}
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void qxl_io_destroy_primary(struct qxl_device *qdev)
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{
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wait_for_io_cmd(qdev, 0, QXL_IO_DESTROY_PRIMARY_ASYNC);
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}
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void qxl_io_create_primary(struct qxl_device *qdev, unsigned width,
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unsigned height, unsigned offset, struct qxl_bo *bo)
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{
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struct qxl_surface_create *create;
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QXL_INFO(qdev, "%s: qdev %p, ram_header %p\n", __func__, qdev,
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qdev->ram_header);
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create = &qdev->ram_header->create_surface;
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create->format = bo->surf.format;
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create->width = width;
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create->height = height;
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create->stride = bo->surf.stride;
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create->mem = qxl_bo_physical_address(qdev, bo, offset);
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QXL_INFO(qdev, "%s: mem = %llx, from %p\n", __func__, create->mem,
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bo->kptr);
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create->flags = QXL_SURF_FLAG_KEEP_DATA;
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create->type = QXL_SURF_TYPE_PRIMARY;
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wait_for_io_cmd(qdev, 0, QXL_IO_CREATE_PRIMARY_ASYNC);
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}
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void qxl_io_memslot_add(struct qxl_device *qdev, uint8_t id)
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{
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QXL_INFO(qdev, "qxl_memslot_add %d\n", id);
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wait_for_io_cmd(qdev, id, QXL_IO_MEMSLOT_ADD_ASYNC);
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}
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void qxl_io_log(struct qxl_device *qdev, const char *fmt, ...)
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{
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va_list args;
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va_start(args, fmt);
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vsnprintf(qdev->ram_header->log_buf, QXL_LOG_BUF_SIZE, fmt, args);
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va_end(args);
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/*
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* DO not do a DRM output here - this will call printk, which will
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* call back into qxl for rendering (qxl_fb)
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*/
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outb(0, qdev->io_base + QXL_IO_LOG);
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}
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void qxl_io_reset(struct qxl_device *qdev)
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{
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outb(0, qdev->io_base + QXL_IO_RESET);
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}
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void qxl_io_monitors_config(struct qxl_device *qdev)
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{
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qxl_io_log(qdev, "%s: %d [%dx%d+%d+%d]\n", __func__,
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qdev->monitors_config ?
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qdev->monitors_config->count : -1,
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qdev->monitors_config && qdev->monitors_config->count ?
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qdev->monitors_config->heads[0].width : -1,
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qdev->monitors_config && qdev->monitors_config->count ?
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qdev->monitors_config->heads[0].height : -1,
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qdev->monitors_config && qdev->monitors_config->count ?
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qdev->monitors_config->heads[0].x : -1,
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qdev->monitors_config && qdev->monitors_config->count ?
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qdev->monitors_config->heads[0].y : -1
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);
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wait_for_io_cmd(qdev, 0, QXL_IO_MONITORS_CONFIG_ASYNC);
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}
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int qxl_surface_id_alloc(struct qxl_device *qdev,
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struct qxl_bo *surf)
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{
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uint32_t handle = -ENOMEM;
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int idr_ret;
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int count = 0;
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again:
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if (idr_pre_get(&qdev->surf_id_idr, GFP_ATOMIC) == 0) {
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DRM_ERROR("Out of memory for surf idr\n");
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kfree(surf);
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goto alloc_fail;
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}
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spin_lock(&qdev->surf_id_idr_lock);
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idr_ret = idr_get_new_above(&qdev->surf_id_idr, NULL, 1, &handle);
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spin_unlock(&qdev->surf_id_idr_lock);
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if (idr_ret == -EAGAIN)
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goto again;
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if (handle >= qdev->rom->n_surfaces) {
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count++;
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spin_lock(&qdev->surf_id_idr_lock);
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idr_remove(&qdev->surf_id_idr, handle);
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spin_unlock(&qdev->surf_id_idr_lock);
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qxl_reap_surface_id(qdev, 2);
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goto again;
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}
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surf->surface_id = handle;
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spin_lock(&qdev->surf_id_idr_lock);
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qdev->last_alloced_surf_id = handle;
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spin_unlock(&qdev->surf_id_idr_lock);
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alloc_fail:
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return 0;
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}
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void qxl_surface_id_dealloc(struct qxl_device *qdev,
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uint32_t surface_id)
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{
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spin_lock(&qdev->surf_id_idr_lock);
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idr_remove(&qdev->surf_id_idr, surface_id);
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spin_unlock(&qdev->surf_id_idr_lock);
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}
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int qxl_hw_surface_alloc(struct qxl_device *qdev,
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struct qxl_bo *surf,
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struct ttm_mem_reg *new_mem)
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{
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struct qxl_surface_cmd *cmd;
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struct qxl_release *release;
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int ret;
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if (surf->hw_surf_alloc)
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return 0;
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ret = qxl_alloc_surface_release_reserved(qdev, QXL_SURFACE_CMD_CREATE,
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NULL,
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&release);
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if (ret)
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return ret;
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cmd = (struct qxl_surface_cmd *)qxl_release_map(qdev, release);
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cmd->type = QXL_SURFACE_CMD_CREATE;
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cmd->u.surface_create.format = surf->surf.format;
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cmd->u.surface_create.width = surf->surf.width;
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cmd->u.surface_create.height = surf->surf.height;
|
|
cmd->u.surface_create.stride = surf->surf.stride;
|
|
if (new_mem) {
|
|
int slot_id = surf->type == QXL_GEM_DOMAIN_VRAM ? qdev->main_mem_slot : qdev->surfaces_mem_slot;
|
|
struct qxl_memslot *slot = &(qdev->mem_slots[slot_id]);
|
|
|
|
/* TODO - need to hold one of the locks to read tbo.offset */
|
|
cmd->u.surface_create.data = slot->high_bits;
|
|
|
|
cmd->u.surface_create.data |= (new_mem->start << PAGE_SHIFT) + surf->tbo.bdev->man[new_mem->mem_type].gpu_offset;
|
|
} else
|
|
cmd->u.surface_create.data = qxl_bo_physical_address(qdev, surf, 0);
|
|
cmd->surface_id = surf->surface_id;
|
|
qxl_release_unmap(qdev, release, &cmd->release_info);
|
|
|
|
surf->surf_create = release;
|
|
|
|
/* no need to add a release to the fence for this bo,
|
|
since it is only released when we ask to destroy the surface
|
|
and it would never signal otherwise */
|
|
qxl_fence_releaseable(qdev, release);
|
|
|
|
qxl_push_command_ring_release(qdev, release, QXL_CMD_SURFACE, false);
|
|
|
|
qxl_release_unreserve(qdev, release);
|
|
|
|
surf->hw_surf_alloc = true;
|
|
spin_lock(&qdev->surf_id_idr_lock);
|
|
idr_replace(&qdev->surf_id_idr, surf, surf->surface_id);
|
|
spin_unlock(&qdev->surf_id_idr_lock);
|
|
return 0;
|
|
}
|
|
|
|
int qxl_hw_surface_dealloc(struct qxl_device *qdev,
|
|
struct qxl_bo *surf)
|
|
{
|
|
struct qxl_surface_cmd *cmd;
|
|
struct qxl_release *release;
|
|
int ret;
|
|
int id;
|
|
|
|
if (!surf->hw_surf_alloc)
|
|
return 0;
|
|
|
|
ret = qxl_alloc_surface_release_reserved(qdev, QXL_SURFACE_CMD_DESTROY,
|
|
surf->surf_create,
|
|
&release);
|
|
if (ret)
|
|
return ret;
|
|
|
|
surf->surf_create = NULL;
|
|
/* remove the surface from the idr, but not the surface id yet */
|
|
spin_lock(&qdev->surf_id_idr_lock);
|
|
idr_replace(&qdev->surf_id_idr, NULL, surf->surface_id);
|
|
spin_unlock(&qdev->surf_id_idr_lock);
|
|
surf->hw_surf_alloc = false;
|
|
|
|
id = surf->surface_id;
|
|
surf->surface_id = 0;
|
|
|
|
release->surface_release_id = id;
|
|
cmd = (struct qxl_surface_cmd *)qxl_release_map(qdev, release);
|
|
cmd->type = QXL_SURFACE_CMD_DESTROY;
|
|
cmd->surface_id = id;
|
|
qxl_release_unmap(qdev, release, &cmd->release_info);
|
|
|
|
qxl_fence_releaseable(qdev, release);
|
|
|
|
qxl_push_command_ring_release(qdev, release, QXL_CMD_SURFACE, false);
|
|
|
|
qxl_release_unreserve(qdev, release);
|
|
|
|
|
|
return 0;
|
|
}
|
|
|
|
int qxl_update_surface(struct qxl_device *qdev, struct qxl_bo *surf)
|
|
{
|
|
struct qxl_rect rect;
|
|
int ret;
|
|
|
|
/* if we are evicting, we need to make sure the surface is up
|
|
to date */
|
|
rect.left = 0;
|
|
rect.right = surf->surf.width;
|
|
rect.top = 0;
|
|
rect.bottom = surf->surf.height;
|
|
retry:
|
|
ret = qxl_io_update_area(qdev, surf, &rect);
|
|
if (ret == -ERESTARTSYS)
|
|
goto retry;
|
|
return ret;
|
|
}
|
|
|
|
static void qxl_surface_evict_locked(struct qxl_device *qdev, struct qxl_bo *surf, bool do_update_area)
|
|
{
|
|
/* no need to update area if we are just freeing the surface normally */
|
|
if (do_update_area)
|
|
qxl_update_surface(qdev, surf);
|
|
|
|
/* nuke the surface id at the hw */
|
|
qxl_hw_surface_dealloc(qdev, surf);
|
|
}
|
|
|
|
void qxl_surface_evict(struct qxl_device *qdev, struct qxl_bo *surf, bool do_update_area)
|
|
{
|
|
mutex_lock(&qdev->surf_evict_mutex);
|
|
qxl_surface_evict_locked(qdev, surf, do_update_area);
|
|
mutex_unlock(&qdev->surf_evict_mutex);
|
|
}
|
|
|
|
static int qxl_reap_surf(struct qxl_device *qdev, struct qxl_bo *surf, bool stall)
|
|
{
|
|
int ret;
|
|
|
|
ret = qxl_bo_reserve(surf, false);
|
|
if (ret == -EBUSY)
|
|
return -EBUSY;
|
|
|
|
if (surf->fence.num_active_releases > 0 && stall == false) {
|
|
qxl_bo_unreserve(surf);
|
|
return -EBUSY;
|
|
}
|
|
|
|
if (stall)
|
|
mutex_unlock(&qdev->surf_evict_mutex);
|
|
|
|
spin_lock(&surf->tbo.bdev->fence_lock);
|
|
ret = ttm_bo_wait(&surf->tbo, true, true, !stall);
|
|
spin_unlock(&surf->tbo.bdev->fence_lock);
|
|
|
|
if (stall)
|
|
mutex_lock(&qdev->surf_evict_mutex);
|
|
if (ret == -EBUSY) {
|
|
qxl_bo_unreserve(surf);
|
|
return -EBUSY;
|
|
}
|
|
|
|
qxl_surface_evict_locked(qdev, surf, true);
|
|
qxl_bo_unreserve(surf);
|
|
return 0;
|
|
}
|
|
|
|
static int qxl_reap_surface_id(struct qxl_device *qdev, int max_to_reap)
|
|
{
|
|
int num_reaped = 0;
|
|
int i, ret;
|
|
bool stall = false;
|
|
int start = 0;
|
|
|
|
mutex_lock(&qdev->surf_evict_mutex);
|
|
again:
|
|
|
|
spin_lock(&qdev->surf_id_idr_lock);
|
|
start = qdev->last_alloced_surf_id + 1;
|
|
spin_unlock(&qdev->surf_id_idr_lock);
|
|
|
|
for (i = start; i < start + qdev->rom->n_surfaces; i++) {
|
|
void *objptr;
|
|
int surfid = i % qdev->rom->n_surfaces;
|
|
|
|
/* this avoids the case where the objects is in the
|
|
idr but has been evicted half way - its makes
|
|
the idr lookup atomic with the eviction */
|
|
spin_lock(&qdev->surf_id_idr_lock);
|
|
objptr = idr_find(&qdev->surf_id_idr, surfid);
|
|
spin_unlock(&qdev->surf_id_idr_lock);
|
|
|
|
if (!objptr)
|
|
continue;
|
|
|
|
ret = qxl_reap_surf(qdev, objptr, stall);
|
|
if (ret == 0)
|
|
num_reaped++;
|
|
if (num_reaped >= max_to_reap)
|
|
break;
|
|
}
|
|
if (num_reaped == 0 && stall == false) {
|
|
stall = true;
|
|
goto again;
|
|
}
|
|
|
|
mutex_unlock(&qdev->surf_evict_mutex);
|
|
if (num_reaped) {
|
|
usleep_range(500, 1000);
|
|
qxl_queue_garbage_collect(qdev, true);
|
|
}
|
|
|
|
return 0;
|
|
}
|