diff options
author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/gpu/drm/qxl/qxl_cmd.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/gpu/drm/qxl/qxl_cmd.c')
-rw-r--r-- | kernel/drivers/gpu/drm/qxl/qxl_cmd.c | 686 |
1 files changed, 686 insertions, 0 deletions
diff --git a/kernel/drivers/gpu/drm/qxl/qxl_cmd.c b/kernel/drivers/gpu/drm/qxl/qxl_cmd.c new file mode 100644 index 000000000..97823644d --- /dev/null +++ b/kernel/drivers/gpu/drm/qxl/qxl_cmd.c @@ -0,0 +1,686 @@ +/* + * Copyright 2013 Red Hat Inc. + * + * 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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. + * + * Authors: Dave Airlie + * Alon Levy + */ + +/* QXL cmd/ring handling */ + +#include "qxl_drv.h" +#include "qxl_object.h" + +static int qxl_reap_surface_id(struct qxl_device *qdev, int max_to_reap); + +struct ring { + struct qxl_ring_header header; + uint8_t elements[0]; +}; + +struct qxl_ring { + struct ring *ring; + int element_size; + int n_elements; + int prod_notify; + wait_queue_head_t *push_event; + spinlock_t lock; +}; + +void qxl_ring_free(struct qxl_ring *ring) +{ + kfree(ring); +} + +void qxl_ring_init_hdr(struct qxl_ring *ring) +{ + ring->ring->header.notify_on_prod = ring->n_elements; +} + +struct qxl_ring * +qxl_ring_create(struct qxl_ring_header *header, + int element_size, + int n_elements, + int prod_notify, + bool set_prod_notify, + wait_queue_head_t *push_event) +{ + struct qxl_ring *ring; + + ring = kmalloc(sizeof(*ring), GFP_KERNEL); + if (!ring) + return NULL; + + ring->ring = (struct ring *)header; + ring->element_size = element_size; + ring->n_elements = n_elements; + ring->prod_notify = prod_notify; + ring->push_event = push_event; + if (set_prod_notify) + qxl_ring_init_hdr(ring); + spin_lock_init(&ring->lock); + return ring; +} + +static int qxl_check_header(struct qxl_ring *ring) +{ + int ret; + struct qxl_ring_header *header = &(ring->ring->header); + unsigned long flags; + spin_lock_irqsave(&ring->lock, flags); + ret = header->prod - header->cons < header->num_items; + if (ret == 0) + header->notify_on_cons = header->cons + 1; + spin_unlock_irqrestore(&ring->lock, flags); + return ret; +} + +int qxl_check_idle(struct qxl_ring *ring) +{ + int ret; + struct qxl_ring_header *header = &(ring->ring->header); + unsigned long flags; + spin_lock_irqsave(&ring->lock, flags); + ret = header->prod == header->cons; + spin_unlock_irqrestore(&ring->lock, flags); + return ret; +} + +int qxl_ring_push(struct qxl_ring *ring, + const void *new_elt, bool interruptible) +{ + struct qxl_ring_header *header = &(ring->ring->header); + uint8_t *elt; + int idx, ret; + unsigned long flags; + spin_lock_irqsave(&ring->lock, flags); + if (header->prod - header->cons == header->num_items) { + header->notify_on_cons = header->cons + 1; + mb(); + spin_unlock_irqrestore(&ring->lock, flags); + if (!drm_can_sleep()) { + while (!qxl_check_header(ring)) + udelay(1); + } else { + if (interruptible) { + ret = wait_event_interruptible(*ring->push_event, + qxl_check_header(ring)); + if (ret) + return ret; + } else { + wait_event(*ring->push_event, + qxl_check_header(ring)); + } + + } + spin_lock_irqsave(&ring->lock, flags); + } + + idx = header->prod & (ring->n_elements - 1); + elt = ring->ring->elements + idx * ring->element_size; + + memcpy((void *)elt, new_elt, ring->element_size); + + header->prod++; + + mb(); + + if (header->prod == header->notify_on_prod) + outb(0, ring->prod_notify); + + spin_unlock_irqrestore(&ring->lock, flags); + return 0; +} + +static bool qxl_ring_pop(struct qxl_ring *ring, + void *element) +{ + volatile struct qxl_ring_header *header = &(ring->ring->header); + volatile uint8_t *ring_elt; + int idx; + unsigned long flags; + spin_lock_irqsave(&ring->lock, flags); + if (header->cons == header->prod) { + header->notify_on_prod = header->cons + 1; + spin_unlock_irqrestore(&ring->lock, flags); + return false; + } + + idx = header->cons & (ring->n_elements - 1); + ring_elt = ring->ring->elements + idx * ring->element_size; + + memcpy(element, (void *)ring_elt, ring->element_size); + + header->cons++; + + spin_unlock_irqrestore(&ring->lock, flags); + return true; +} + +int +qxl_push_command_ring_release(struct qxl_device *qdev, struct qxl_release *release, + uint32_t type, bool interruptible) +{ + struct qxl_command cmd; + struct qxl_bo_list *entry = list_first_entry(&release->bos, struct qxl_bo_list, tv.head); + + cmd.type = type; + cmd.data = qxl_bo_physical_address(qdev, to_qxl_bo(entry->tv.bo), release->release_offset); + + return qxl_ring_push(qdev->command_ring, &cmd, interruptible); +} + +int +qxl_push_cursor_ring_release(struct qxl_device *qdev, struct qxl_release *release, + uint32_t type, bool interruptible) +{ + struct qxl_command cmd; + struct qxl_bo_list *entry = list_first_entry(&release->bos, struct qxl_bo_list, tv.head); + + cmd.type = type; + cmd.data = qxl_bo_physical_address(qdev, to_qxl_bo(entry->tv.bo), release->release_offset); + + return qxl_ring_push(qdev->cursor_ring, &cmd, interruptible); +} + +bool qxl_queue_garbage_collect(struct qxl_device *qdev, bool flush) +{ + if (!qxl_check_idle(qdev->release_ring)) { + queue_work(qdev->gc_queue, &qdev->gc_work); + if (flush) + flush_work(&qdev->gc_work); + return true; + } + return false; +} + +int qxl_garbage_collect(struct qxl_device *qdev) +{ + struct qxl_release *release; + uint64_t id, next_id; + int i = 0; + union qxl_release_info *info; + + while (qxl_ring_pop(qdev->release_ring, &id)) { + QXL_INFO(qdev, "popped %lld\n", id); + while (id) { + release = qxl_release_from_id_locked(qdev, id); + if (release == NULL) + break; + + info = qxl_release_map(qdev, release); + next_id = info->next; + qxl_release_unmap(qdev, release, info); + + QXL_INFO(qdev, "popped %lld, next %lld\n", id, + next_id); + + switch (release->type) { + case QXL_RELEASE_DRAWABLE: + case QXL_RELEASE_SURFACE_CMD: + case QXL_RELEASE_CURSOR_CMD: + break; + default: + DRM_ERROR("unexpected release type\n"); + break; + } + id = next_id; + + qxl_release_free(qdev, release); + ++i; + } + } + + QXL_INFO(qdev, "%s: %lld\n", __func__, i); + + return i; +} + +int qxl_alloc_bo_reserved(struct qxl_device *qdev, + struct qxl_release *release, + unsigned long size, + struct qxl_bo **_bo) +{ + struct qxl_bo *bo; + int ret; + + ret = qxl_bo_create(qdev, size, false /* not kernel - device */, + false, QXL_GEM_DOMAIN_VRAM, NULL, &bo); + if (ret) { + DRM_ERROR("failed to allocate VRAM BO\n"); + return ret; + } + ret = qxl_release_list_add(release, bo); + if (ret) + goto out_unref; + + *_bo = bo; + return 0; +out_unref: + qxl_bo_unref(&bo); + return ret; +} + +static int wait_for_io_cmd_user(struct qxl_device *qdev, uint8_t val, long port, bool intr) +{ + int irq_num; + long addr = qdev->io_base + port; + int ret; + + mutex_lock(&qdev->async_io_mutex); + irq_num = atomic_read(&qdev->irq_received_io_cmd); + if (qdev->last_sent_io_cmd > irq_num) { + if (intr) + ret = wait_event_interruptible_timeout(qdev->io_cmd_event, + atomic_read(&qdev->irq_received_io_cmd) > irq_num, 5*HZ); + else + ret = wait_event_timeout(qdev->io_cmd_event, + atomic_read(&qdev->irq_received_io_cmd) > irq_num, 5*HZ); + /* 0 is timeout, just bail the "hw" has gone away */ + if (ret <= 0) + goto out; + irq_num = atomic_read(&qdev->irq_received_io_cmd); + } + outb(val, addr); + qdev->last_sent_io_cmd = irq_num + 1; + if (intr) + ret = wait_event_interruptible_timeout(qdev->io_cmd_event, + atomic_read(&qdev->irq_received_io_cmd) > irq_num, 5*HZ); + else + ret = wait_event_timeout(qdev->io_cmd_event, + atomic_read(&qdev->irq_received_io_cmd) > irq_num, 5*HZ); +out: + if (ret > 0) + ret = 0; + mutex_unlock(&qdev->async_io_mutex); + return ret; +} + +static void wait_for_io_cmd(struct qxl_device *qdev, uint8_t val, long port) +{ + int ret; + +restart: + ret = wait_for_io_cmd_user(qdev, val, port, false); + if (ret == -ERESTARTSYS) + goto restart; +} + +int qxl_io_update_area(struct qxl_device *qdev, struct qxl_bo *surf, + const struct qxl_rect *area) +{ + int surface_id; + uint32_t surface_width, surface_height; + int ret; + + if (!surf->hw_surf_alloc) + DRM_ERROR("got io update area with no hw surface\n"); + + if (surf->is_primary) + surface_id = 0; + else + surface_id = surf->surface_id; + surface_width = surf->surf.width; + surface_height = surf->surf.height; + + if (area->left < 0 || area->top < 0 || + area->right > surface_width || area->bottom > surface_height) { + qxl_io_log(qdev, "%s: not doing area update for " + "%d, (%d,%d,%d,%d) (%d,%d)\n", __func__, surface_id, area->left, + area->top, area->right, area->bottom, surface_width, surface_height); + return -EINVAL; + } + mutex_lock(&qdev->update_area_mutex); + qdev->ram_header->update_area = *area; + qdev->ram_header->update_surface = surface_id; + ret = wait_for_io_cmd_user(qdev, 0, QXL_IO_UPDATE_AREA_ASYNC, true); + mutex_unlock(&qdev->update_area_mutex); + return ret; +} + +void qxl_io_notify_oom(struct qxl_device *qdev) +{ + outb(0, qdev->io_base + QXL_IO_NOTIFY_OOM); +} + +void qxl_io_flush_release(struct qxl_device *qdev) +{ + outb(0, qdev->io_base + QXL_IO_FLUSH_RELEASE); +} + +void qxl_io_flush_surfaces(struct qxl_device *qdev) +{ + wait_for_io_cmd(qdev, 0, QXL_IO_FLUSH_SURFACES_ASYNC); +} + + +void qxl_io_destroy_primary(struct qxl_device *qdev) +{ + wait_for_io_cmd(qdev, 0, QXL_IO_DESTROY_PRIMARY_ASYNC); +} + +void qxl_io_create_primary(struct qxl_device *qdev, + unsigned offset, struct qxl_bo *bo) +{ + struct qxl_surface_create *create; + + QXL_INFO(qdev, "%s: qdev %p, ram_header %p\n", __func__, qdev, + qdev->ram_header); + create = &qdev->ram_header->create_surface; + create->format = bo->surf.format; + create->width = bo->surf.width; + create->height = bo->surf.height; + create->stride = bo->surf.stride; + create->mem = qxl_bo_physical_address(qdev, bo, offset); + + QXL_INFO(qdev, "%s: mem = %llx, from %p\n", __func__, create->mem, + bo->kptr); + + create->flags = QXL_SURF_FLAG_KEEP_DATA; + create->type = QXL_SURF_TYPE_PRIMARY; + + wait_for_io_cmd(qdev, 0, QXL_IO_CREATE_PRIMARY_ASYNC); +} + +void qxl_io_memslot_add(struct qxl_device *qdev, uint8_t id) +{ + QXL_INFO(qdev, "qxl_memslot_add %d\n", id); + wait_for_io_cmd(qdev, id, QXL_IO_MEMSLOT_ADD_ASYNC); +} + +void qxl_io_log(struct qxl_device *qdev, const char *fmt, ...) +{ + va_list args; + + va_start(args, fmt); + vsnprintf(qdev->ram_header->log_buf, QXL_LOG_BUF_SIZE, fmt, args); + va_end(args); + /* + * DO not do a DRM output here - this will call printk, which will + * call back into qxl for rendering (qxl_fb) + */ + outb(0, qdev->io_base + QXL_IO_LOG); +} + +void qxl_io_reset(struct qxl_device *qdev) +{ + outb(0, qdev->io_base + QXL_IO_RESET); +} + +void qxl_io_monitors_config(struct qxl_device *qdev) +{ + qxl_io_log(qdev, "%s: %d [%dx%d+%d+%d]\n", __func__, + qdev->monitors_config ? + qdev->monitors_config->count : -1, + qdev->monitors_config && qdev->monitors_config->count ? + qdev->monitors_config->heads[0].width : -1, + qdev->monitors_config && qdev->monitors_config->count ? + qdev->monitors_config->heads[0].height : -1, + qdev->monitors_config && qdev->monitors_config->count ? + qdev->monitors_config->heads[0].x : -1, + qdev->monitors_config && qdev->monitors_config->count ? + qdev->monitors_config->heads[0].y : -1 + ); + + wait_for_io_cmd(qdev, 0, QXL_IO_MONITORS_CONFIG_ASYNC); +} + +int qxl_surface_id_alloc(struct qxl_device *qdev, + struct qxl_bo *surf) +{ + uint32_t handle; + int idr_ret; + int count = 0; +again: + idr_preload(GFP_ATOMIC); + spin_lock(&qdev->surf_id_idr_lock); + idr_ret = idr_alloc(&qdev->surf_id_idr, NULL, 1, 0, GFP_NOWAIT); + spin_unlock(&qdev->surf_id_idr_lock); + idr_preload_end(); + if (idr_ret < 0) + return idr_ret; + handle = idr_ret; + + if (handle >= qdev->rom->n_surfaces) { + count++; + spin_lock(&qdev->surf_id_idr_lock); + idr_remove(&qdev->surf_id_idr, handle); + spin_unlock(&qdev->surf_id_idr_lock); + qxl_reap_surface_id(qdev, 2); + goto again; + } + surf->surface_id = handle; + + spin_lock(&qdev->surf_id_idr_lock); + qdev->last_alloced_surf_id = handle; + spin_unlock(&qdev->surf_id_idr_lock); + return 0; +} + +void qxl_surface_id_dealloc(struct qxl_device *qdev, + uint32_t surface_id) +{ + spin_lock(&qdev->surf_id_idr_lock); + idr_remove(&qdev->surf_id_idr, surface_id); + spin_unlock(&qdev->surf_id_idr_lock); +} + +int qxl_hw_surface_alloc(struct qxl_device *qdev, + struct qxl_bo *surf, + struct ttm_mem_reg *new_mem) +{ + struct qxl_surface_cmd *cmd; + struct qxl_release *release; + int ret; + + if (surf->hw_surf_alloc) + return 0; + + ret = qxl_alloc_surface_release_reserved(qdev, QXL_SURFACE_CMD_CREATE, + NULL, + &release); + if (ret) + return ret; + + ret = qxl_release_reserve_list(release, true); + if (ret) + return ret; + + cmd = (struct qxl_surface_cmd *)qxl_release_map(qdev, release); + cmd->type = QXL_SURFACE_CMD_CREATE; + cmd->u.surface_create.format = surf->surf.format; + cmd->u.surface_create.width = surf->surf.width; + 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 surface bo, + since it is only released when we ask to destroy the surface + and it would never signal otherwise */ + qxl_push_command_ring_release(qdev, release, QXL_CMD_SURFACE, false); + qxl_release_fence_buffer_objects(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_push_command_ring_release(qdev, release, QXL_CMD_SURFACE, false); + + qxl_release_fence_buffer_objects(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 (stall) + mutex_unlock(&qdev->surf_evict_mutex); + + ret = ttm_bo_wait(&surf->tbo, true, true, !stall); + + 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; +} |