mirror of
https://github.com/torvalds/linux.git
synced 2024-12-10 05:01:26 +00:00
81a00960d3
When we refuse DMA from system pages for whatever reason, we don't handle that correctly when guest-backed objects was enabled. Since guest-backed objects by definition require DMA to and from system pages, disable all functionality that relies on them. That basically amounts to 3D acceleration and screen targets. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Brian Paul <brianp@vmware.com>
1420 lines
39 KiB
C
1420 lines
39 KiB
C
// SPDX-License-Identifier: GPL-2.0 OR MIT
|
|
/**************************************************************************
|
|
*
|
|
* Copyright 2015 VMware, Inc., Palo Alto, CA., USA
|
|
*
|
|
* 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, sub license, 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 (including the
|
|
* next paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL
|
|
* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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/dmapool.h>
|
|
#include <linux/pci.h>
|
|
|
|
#include <drm/ttm/ttm_bo_api.h>
|
|
|
|
#include "vmwgfx_drv.h"
|
|
|
|
/*
|
|
* Size of inline command buffers. Try to make sure that a page size is a
|
|
* multiple of the DMA pool allocation size.
|
|
*/
|
|
#define VMW_CMDBUF_INLINE_ALIGN 64
|
|
#define VMW_CMDBUF_INLINE_SIZE \
|
|
(1024 - ALIGN(sizeof(SVGACBHeader), VMW_CMDBUF_INLINE_ALIGN))
|
|
|
|
/**
|
|
* struct vmw_cmdbuf_context - Command buffer context queues
|
|
*
|
|
* @submitted: List of command buffers that have been submitted to the
|
|
* manager but not yet submitted to hardware.
|
|
* @hw_submitted: List of command buffers submitted to hardware.
|
|
* @preempted: List of preempted command buffers.
|
|
* @num_hw_submitted: Number of buffers currently being processed by hardware
|
|
*/
|
|
struct vmw_cmdbuf_context {
|
|
struct list_head submitted;
|
|
struct list_head hw_submitted;
|
|
struct list_head preempted;
|
|
unsigned num_hw_submitted;
|
|
bool block_submission;
|
|
};
|
|
|
|
/**
|
|
* struct vmw_cmdbuf_man: - Command buffer manager
|
|
*
|
|
* @cur_mutex: Mutex protecting the command buffer used for incremental small
|
|
* kernel command submissions, @cur.
|
|
* @space_mutex: Mutex to protect against starvation when we allocate
|
|
* main pool buffer space.
|
|
* @error_mutex: Mutex to serialize the work queue error handling.
|
|
* Note this is not needed if the same workqueue handler
|
|
* can't race with itself...
|
|
* @work: A struct work_struct implementeing command buffer error handling.
|
|
* Immutable.
|
|
* @dev_priv: Pointer to the device private struct. Immutable.
|
|
* @ctx: Array of command buffer context queues. The queues and the context
|
|
* data is protected by @lock.
|
|
* @error: List of command buffers that have caused device errors.
|
|
* Protected by @lock.
|
|
* @mm: Range manager for the command buffer space. Manager allocations and
|
|
* frees are protected by @lock.
|
|
* @cmd_space: Buffer object for the command buffer space, unless we were
|
|
* able to make a contigous coherent DMA memory allocation, @handle. Immutable.
|
|
* @map_obj: Mapping state for @cmd_space. Immutable.
|
|
* @map: Pointer to command buffer space. May be a mapped buffer object or
|
|
* a contigous coherent DMA memory allocation. Immutable.
|
|
* @cur: Command buffer for small kernel command submissions. Protected by
|
|
* the @cur_mutex.
|
|
* @cur_pos: Space already used in @cur. Protected by @cur_mutex.
|
|
* @default_size: Default size for the @cur command buffer. Immutable.
|
|
* @max_hw_submitted: Max number of in-flight command buffers the device can
|
|
* handle. Immutable.
|
|
* @lock: Spinlock protecting command submission queues.
|
|
* @header: Pool of DMA memory for device command buffer headers.
|
|
* Internal protection.
|
|
* @dheaders: Pool of DMA memory for device command buffer headers with trailing
|
|
* space for inline data. Internal protection.
|
|
* @alloc_queue: Wait queue for processes waiting to allocate command buffer
|
|
* space.
|
|
* @idle_queue: Wait queue for processes waiting for command buffer idle.
|
|
* @irq_on: Whether the process function has requested irq to be turned on.
|
|
* Protected by @lock.
|
|
* @using_mob: Whether the command buffer space is a MOB or a contigous DMA
|
|
* allocation. Immutable.
|
|
* @has_pool: Has a large pool of DMA memory which allows larger allocations.
|
|
* Typically this is false only during bootstrap.
|
|
* @handle: DMA address handle for the command buffer space if @using_mob is
|
|
* false. Immutable.
|
|
* @size: The size of the command buffer space. Immutable.
|
|
* @num_contexts: Number of contexts actually enabled.
|
|
*/
|
|
struct vmw_cmdbuf_man {
|
|
struct mutex cur_mutex;
|
|
struct mutex space_mutex;
|
|
struct mutex error_mutex;
|
|
struct work_struct work;
|
|
struct vmw_private *dev_priv;
|
|
struct vmw_cmdbuf_context ctx[SVGA_CB_CONTEXT_MAX];
|
|
struct list_head error;
|
|
struct drm_mm mm;
|
|
struct ttm_buffer_object *cmd_space;
|
|
struct ttm_bo_kmap_obj map_obj;
|
|
u8 *map;
|
|
struct vmw_cmdbuf_header *cur;
|
|
size_t cur_pos;
|
|
size_t default_size;
|
|
unsigned max_hw_submitted;
|
|
spinlock_t lock;
|
|
struct dma_pool *headers;
|
|
struct dma_pool *dheaders;
|
|
wait_queue_head_t alloc_queue;
|
|
wait_queue_head_t idle_queue;
|
|
bool irq_on;
|
|
bool using_mob;
|
|
bool has_pool;
|
|
dma_addr_t handle;
|
|
size_t size;
|
|
u32 num_contexts;
|
|
};
|
|
|
|
/**
|
|
* struct vmw_cmdbuf_header - Command buffer metadata
|
|
*
|
|
* @man: The command buffer manager.
|
|
* @cb_header: Device command buffer header, allocated from a DMA pool.
|
|
* @cb_context: The device command buffer context.
|
|
* @list: List head for attaching to the manager lists.
|
|
* @node: The range manager node.
|
|
* @handle. The DMA address of @cb_header. Handed to the device on command
|
|
* buffer submission.
|
|
* @cmd: Pointer to the command buffer space of this buffer.
|
|
* @size: Size of the command buffer space of this buffer.
|
|
* @reserved: Reserved space of this buffer.
|
|
* @inline_space: Whether inline command buffer space is used.
|
|
*/
|
|
struct vmw_cmdbuf_header {
|
|
struct vmw_cmdbuf_man *man;
|
|
SVGACBHeader *cb_header;
|
|
SVGACBContext cb_context;
|
|
struct list_head list;
|
|
struct drm_mm_node node;
|
|
dma_addr_t handle;
|
|
u8 *cmd;
|
|
size_t size;
|
|
size_t reserved;
|
|
bool inline_space;
|
|
};
|
|
|
|
/**
|
|
* struct vmw_cmdbuf_dheader - Device command buffer header with inline
|
|
* command buffer space.
|
|
*
|
|
* @cb_header: Device command buffer header.
|
|
* @cmd: Inline command buffer space.
|
|
*/
|
|
struct vmw_cmdbuf_dheader {
|
|
SVGACBHeader cb_header;
|
|
u8 cmd[VMW_CMDBUF_INLINE_SIZE] __aligned(VMW_CMDBUF_INLINE_ALIGN);
|
|
};
|
|
|
|
/**
|
|
* struct vmw_cmdbuf_alloc_info - Command buffer space allocation metadata
|
|
*
|
|
* @page_size: Size of requested command buffer space in pages.
|
|
* @node: Pointer to the range manager node.
|
|
* @done: True if this allocation has succeeded.
|
|
*/
|
|
struct vmw_cmdbuf_alloc_info {
|
|
size_t page_size;
|
|
struct drm_mm_node *node;
|
|
bool done;
|
|
};
|
|
|
|
/* Loop over each context in the command buffer manager. */
|
|
#define for_each_cmdbuf_ctx(_man, _i, _ctx) \
|
|
for (_i = 0, _ctx = &(_man)->ctx[0]; (_i) < (_man)->num_contexts; \
|
|
++(_i), ++(_ctx))
|
|
|
|
static int vmw_cmdbuf_startstop(struct vmw_cmdbuf_man *man, u32 context,
|
|
bool enable);
|
|
static int vmw_cmdbuf_preempt(struct vmw_cmdbuf_man *man, u32 context);
|
|
|
|
/**
|
|
* vmw_cmdbuf_cur_lock - Helper to lock the cur_mutex.
|
|
*
|
|
* @man: The range manager.
|
|
* @interruptible: Whether to wait interruptible when locking.
|
|
*/
|
|
static int vmw_cmdbuf_cur_lock(struct vmw_cmdbuf_man *man, bool interruptible)
|
|
{
|
|
if (interruptible) {
|
|
if (mutex_lock_interruptible(&man->cur_mutex))
|
|
return -ERESTARTSYS;
|
|
} else {
|
|
mutex_lock(&man->cur_mutex);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* vmw_cmdbuf_cur_unlock - Helper to unlock the cur_mutex.
|
|
*
|
|
* @man: The range manager.
|
|
*/
|
|
static void vmw_cmdbuf_cur_unlock(struct vmw_cmdbuf_man *man)
|
|
{
|
|
mutex_unlock(&man->cur_mutex);
|
|
}
|
|
|
|
/**
|
|
* vmw_cmdbuf_header_inline_free - Free a struct vmw_cmdbuf_header that has
|
|
* been used for the device context with inline command buffers.
|
|
* Need not be called locked.
|
|
*
|
|
* @header: Pointer to the header to free.
|
|
*/
|
|
static void vmw_cmdbuf_header_inline_free(struct vmw_cmdbuf_header *header)
|
|
{
|
|
struct vmw_cmdbuf_dheader *dheader;
|
|
|
|
if (WARN_ON_ONCE(!header->inline_space))
|
|
return;
|
|
|
|
dheader = container_of(header->cb_header, struct vmw_cmdbuf_dheader,
|
|
cb_header);
|
|
dma_pool_free(header->man->dheaders, dheader, header->handle);
|
|
kfree(header);
|
|
}
|
|
|
|
/**
|
|
* __vmw_cmdbuf_header_free - Free a struct vmw_cmdbuf_header and its
|
|
* associated structures.
|
|
*
|
|
* header: Pointer to the header to free.
|
|
*
|
|
* For internal use. Must be called with man::lock held.
|
|
*/
|
|
static void __vmw_cmdbuf_header_free(struct vmw_cmdbuf_header *header)
|
|
{
|
|
struct vmw_cmdbuf_man *man = header->man;
|
|
|
|
lockdep_assert_held_once(&man->lock);
|
|
|
|
if (header->inline_space) {
|
|
vmw_cmdbuf_header_inline_free(header);
|
|
return;
|
|
}
|
|
|
|
drm_mm_remove_node(&header->node);
|
|
wake_up_all(&man->alloc_queue);
|
|
if (header->cb_header)
|
|
dma_pool_free(man->headers, header->cb_header,
|
|
header->handle);
|
|
kfree(header);
|
|
}
|
|
|
|
/**
|
|
* vmw_cmdbuf_header_free - Free a struct vmw_cmdbuf_header and its
|
|
* associated structures.
|
|
*
|
|
* @header: Pointer to the header to free.
|
|
*/
|
|
void vmw_cmdbuf_header_free(struct vmw_cmdbuf_header *header)
|
|
{
|
|
struct vmw_cmdbuf_man *man = header->man;
|
|
|
|
/* Avoid locking if inline_space */
|
|
if (header->inline_space) {
|
|
vmw_cmdbuf_header_inline_free(header);
|
|
return;
|
|
}
|
|
spin_lock(&man->lock);
|
|
__vmw_cmdbuf_header_free(header);
|
|
spin_unlock(&man->lock);
|
|
}
|
|
|
|
|
|
/**
|
|
* vmw_cmbuf_header_submit: Submit a command buffer to hardware.
|
|
*
|
|
* @header: The header of the buffer to submit.
|
|
*/
|
|
static int vmw_cmdbuf_header_submit(struct vmw_cmdbuf_header *header)
|
|
{
|
|
struct vmw_cmdbuf_man *man = header->man;
|
|
u32 val;
|
|
|
|
val = upper_32_bits(header->handle);
|
|
vmw_write(man->dev_priv, SVGA_REG_COMMAND_HIGH, val);
|
|
|
|
val = lower_32_bits(header->handle);
|
|
val |= header->cb_context & SVGA_CB_CONTEXT_MASK;
|
|
vmw_write(man->dev_priv, SVGA_REG_COMMAND_LOW, val);
|
|
|
|
return header->cb_header->status;
|
|
}
|
|
|
|
/**
|
|
* vmw_cmdbuf_ctx_init: Initialize a command buffer context.
|
|
*
|
|
* @ctx: The command buffer context to initialize
|
|
*/
|
|
static void vmw_cmdbuf_ctx_init(struct vmw_cmdbuf_context *ctx)
|
|
{
|
|
INIT_LIST_HEAD(&ctx->hw_submitted);
|
|
INIT_LIST_HEAD(&ctx->submitted);
|
|
INIT_LIST_HEAD(&ctx->preempted);
|
|
ctx->num_hw_submitted = 0;
|
|
}
|
|
|
|
/**
|
|
* vmw_cmdbuf_ctx_submit: Submit command buffers from a command buffer
|
|
* context.
|
|
*
|
|
* @man: The command buffer manager.
|
|
* @ctx: The command buffer context.
|
|
*
|
|
* Submits command buffers to hardware until there are no more command
|
|
* buffers to submit or the hardware can't handle more command buffers.
|
|
*/
|
|
static void vmw_cmdbuf_ctx_submit(struct vmw_cmdbuf_man *man,
|
|
struct vmw_cmdbuf_context *ctx)
|
|
{
|
|
while (ctx->num_hw_submitted < man->max_hw_submitted &&
|
|
!list_empty(&ctx->submitted) &&
|
|
!ctx->block_submission) {
|
|
struct vmw_cmdbuf_header *entry;
|
|
SVGACBStatus status;
|
|
|
|
entry = list_first_entry(&ctx->submitted,
|
|
struct vmw_cmdbuf_header,
|
|
list);
|
|
|
|
status = vmw_cmdbuf_header_submit(entry);
|
|
|
|
/* This should never happen */
|
|
if (WARN_ON_ONCE(status == SVGA_CB_STATUS_QUEUE_FULL)) {
|
|
entry->cb_header->status = SVGA_CB_STATUS_NONE;
|
|
break;
|
|
}
|
|
|
|
list_del(&entry->list);
|
|
list_add_tail(&entry->list, &ctx->hw_submitted);
|
|
ctx->num_hw_submitted++;
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* vmw_cmdbuf_ctx_submit: Process a command buffer context.
|
|
*
|
|
* @man: The command buffer manager.
|
|
* @ctx: The command buffer context.
|
|
*
|
|
* Submit command buffers to hardware if possible, and process finished
|
|
* buffers. Typically freeing them, but on preemption or error take
|
|
* appropriate action. Wake up waiters if appropriate.
|
|
*/
|
|
static void vmw_cmdbuf_ctx_process(struct vmw_cmdbuf_man *man,
|
|
struct vmw_cmdbuf_context *ctx,
|
|
int *notempty)
|
|
{
|
|
struct vmw_cmdbuf_header *entry, *next;
|
|
|
|
vmw_cmdbuf_ctx_submit(man, ctx);
|
|
|
|
list_for_each_entry_safe(entry, next, &ctx->hw_submitted, list) {
|
|
SVGACBStatus status = entry->cb_header->status;
|
|
|
|
if (status == SVGA_CB_STATUS_NONE)
|
|
break;
|
|
|
|
list_del(&entry->list);
|
|
wake_up_all(&man->idle_queue);
|
|
ctx->num_hw_submitted--;
|
|
switch (status) {
|
|
case SVGA_CB_STATUS_COMPLETED:
|
|
__vmw_cmdbuf_header_free(entry);
|
|
break;
|
|
case SVGA_CB_STATUS_COMMAND_ERROR:
|
|
WARN_ONCE(true, "Command buffer error.\n");
|
|
entry->cb_header->status = SVGA_CB_STATUS_NONE;
|
|
list_add_tail(&entry->list, &man->error);
|
|
schedule_work(&man->work);
|
|
break;
|
|
case SVGA_CB_STATUS_PREEMPTED:
|
|
entry->cb_header->status = SVGA_CB_STATUS_NONE;
|
|
list_add_tail(&entry->list, &ctx->preempted);
|
|
break;
|
|
case SVGA_CB_STATUS_CB_HEADER_ERROR:
|
|
WARN_ONCE(true, "Command buffer header error.\n");
|
|
__vmw_cmdbuf_header_free(entry);
|
|
break;
|
|
default:
|
|
WARN_ONCE(true, "Undefined command buffer status.\n");
|
|
__vmw_cmdbuf_header_free(entry);
|
|
break;
|
|
}
|
|
}
|
|
|
|
vmw_cmdbuf_ctx_submit(man, ctx);
|
|
if (!list_empty(&ctx->submitted))
|
|
(*notempty)++;
|
|
}
|
|
|
|
/**
|
|
* vmw_cmdbuf_man_process - Process all command buffer contexts and
|
|
* switch on and off irqs as appropriate.
|
|
*
|
|
* @man: The command buffer manager.
|
|
*
|
|
* Calls vmw_cmdbuf_ctx_process() on all contexts. If any context has
|
|
* command buffers left that are not submitted to hardware, Make sure
|
|
* IRQ handling is turned on. Otherwise, make sure it's turned off.
|
|
*/
|
|
static void vmw_cmdbuf_man_process(struct vmw_cmdbuf_man *man)
|
|
{
|
|
int notempty;
|
|
struct vmw_cmdbuf_context *ctx;
|
|
int i;
|
|
|
|
retry:
|
|
notempty = 0;
|
|
for_each_cmdbuf_ctx(man, i, ctx)
|
|
vmw_cmdbuf_ctx_process(man, ctx, ¬empty);
|
|
|
|
if (man->irq_on && !notempty) {
|
|
vmw_generic_waiter_remove(man->dev_priv,
|
|
SVGA_IRQFLAG_COMMAND_BUFFER,
|
|
&man->dev_priv->cmdbuf_waiters);
|
|
man->irq_on = false;
|
|
} else if (!man->irq_on && notempty) {
|
|
vmw_generic_waiter_add(man->dev_priv,
|
|
SVGA_IRQFLAG_COMMAND_BUFFER,
|
|
&man->dev_priv->cmdbuf_waiters);
|
|
man->irq_on = true;
|
|
|
|
/* Rerun in case we just missed an irq. */
|
|
goto retry;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* vmw_cmdbuf_ctx_add - Schedule a command buffer for submission on a
|
|
* command buffer context
|
|
*
|
|
* @man: The command buffer manager.
|
|
* @header: The header of the buffer to submit.
|
|
* @cb_context: The command buffer context to use.
|
|
*
|
|
* This function adds @header to the "submitted" queue of the command
|
|
* buffer context identified by @cb_context. It then calls the command buffer
|
|
* manager processing to potentially submit the buffer to hardware.
|
|
* @man->lock needs to be held when calling this function.
|
|
*/
|
|
static void vmw_cmdbuf_ctx_add(struct vmw_cmdbuf_man *man,
|
|
struct vmw_cmdbuf_header *header,
|
|
SVGACBContext cb_context)
|
|
{
|
|
if (!(header->cb_header->flags & SVGA_CB_FLAG_DX_CONTEXT))
|
|
header->cb_header->dxContext = 0;
|
|
header->cb_context = cb_context;
|
|
list_add_tail(&header->list, &man->ctx[cb_context].submitted);
|
|
|
|
vmw_cmdbuf_man_process(man);
|
|
}
|
|
|
|
/**
|
|
* vmw_cmdbuf_irqthread - The main part of the command buffer interrupt
|
|
* handler implemented as a threaded irq task.
|
|
*
|
|
* @man: Pointer to the command buffer manager.
|
|
*
|
|
* The bottom half of the interrupt handler simply calls into the
|
|
* command buffer processor to free finished buffers and submit any
|
|
* queued buffers to hardware.
|
|
*/
|
|
void vmw_cmdbuf_irqthread(struct vmw_cmdbuf_man *man)
|
|
{
|
|
spin_lock(&man->lock);
|
|
vmw_cmdbuf_man_process(man);
|
|
spin_unlock(&man->lock);
|
|
}
|
|
|
|
/**
|
|
* vmw_cmdbuf_work_func - The deferred work function that handles
|
|
* command buffer errors.
|
|
*
|
|
* @work: The work func closure argument.
|
|
*
|
|
* Restarting the command buffer context after an error requires process
|
|
* context, so it is deferred to this work function.
|
|
*/
|
|
static void vmw_cmdbuf_work_func(struct work_struct *work)
|
|
{
|
|
struct vmw_cmdbuf_man *man =
|
|
container_of(work, struct vmw_cmdbuf_man, work);
|
|
struct vmw_cmdbuf_header *entry, *next;
|
|
uint32_t dummy;
|
|
bool send_fence = false;
|
|
struct list_head restart_head[SVGA_CB_CONTEXT_MAX];
|
|
int i;
|
|
struct vmw_cmdbuf_context *ctx;
|
|
bool global_block = false;
|
|
|
|
for_each_cmdbuf_ctx(man, i, ctx)
|
|
INIT_LIST_HEAD(&restart_head[i]);
|
|
|
|
mutex_lock(&man->error_mutex);
|
|
spin_lock(&man->lock);
|
|
list_for_each_entry_safe(entry, next, &man->error, list) {
|
|
SVGACBHeader *cb_hdr = entry->cb_header;
|
|
SVGA3dCmdHeader *header = (SVGA3dCmdHeader *)
|
|
(entry->cmd + cb_hdr->errorOffset);
|
|
u32 error_cmd_size, new_start_offset;
|
|
const char *cmd_name;
|
|
|
|
list_del_init(&entry->list);
|
|
global_block = true;
|
|
|
|
if (!vmw_cmd_describe(header, &error_cmd_size, &cmd_name)) {
|
|
VMW_DEBUG_USER("Unknown command causing device error.\n");
|
|
VMW_DEBUG_USER("Command buffer offset is %lu\n",
|
|
(unsigned long) cb_hdr->errorOffset);
|
|
__vmw_cmdbuf_header_free(entry);
|
|
send_fence = true;
|
|
continue;
|
|
}
|
|
|
|
VMW_DEBUG_USER("Command \"%s\" causing device error.\n",
|
|
cmd_name);
|
|
VMW_DEBUG_USER("Command buffer offset is %lu\n",
|
|
(unsigned long) cb_hdr->errorOffset);
|
|
VMW_DEBUG_USER("Command size is %lu\n",
|
|
(unsigned long) error_cmd_size);
|
|
|
|
new_start_offset = cb_hdr->errorOffset + error_cmd_size;
|
|
|
|
if (new_start_offset >= cb_hdr->length) {
|
|
__vmw_cmdbuf_header_free(entry);
|
|
send_fence = true;
|
|
continue;
|
|
}
|
|
|
|
if (man->using_mob)
|
|
cb_hdr->ptr.mob.mobOffset += new_start_offset;
|
|
else
|
|
cb_hdr->ptr.pa += (u64) new_start_offset;
|
|
|
|
entry->cmd += new_start_offset;
|
|
cb_hdr->length -= new_start_offset;
|
|
cb_hdr->errorOffset = 0;
|
|
cb_hdr->offset = 0;
|
|
|
|
list_add_tail(&entry->list, &restart_head[entry->cb_context]);
|
|
}
|
|
|
|
for_each_cmdbuf_ctx(man, i, ctx)
|
|
man->ctx[i].block_submission = true;
|
|
|
|
spin_unlock(&man->lock);
|
|
|
|
/* Preempt all contexts */
|
|
if (global_block && vmw_cmdbuf_preempt(man, 0))
|
|
DRM_ERROR("Failed preempting command buffer contexts\n");
|
|
|
|
spin_lock(&man->lock);
|
|
for_each_cmdbuf_ctx(man, i, ctx) {
|
|
/* Move preempted command buffers to the preempted queue. */
|
|
vmw_cmdbuf_ctx_process(man, ctx, &dummy);
|
|
|
|
/*
|
|
* Add the preempted queue after the command buffer
|
|
* that caused an error.
|
|
*/
|
|
list_splice_init(&ctx->preempted, restart_head[i].prev);
|
|
|
|
/*
|
|
* Finally add all command buffers first in the submitted
|
|
* queue, to rerun them.
|
|
*/
|
|
|
|
ctx->block_submission = false;
|
|
list_splice_init(&restart_head[i], &ctx->submitted);
|
|
}
|
|
|
|
vmw_cmdbuf_man_process(man);
|
|
spin_unlock(&man->lock);
|
|
|
|
if (global_block && vmw_cmdbuf_startstop(man, 0, true))
|
|
DRM_ERROR("Failed restarting command buffer contexts\n");
|
|
|
|
/* Send a new fence in case one was removed */
|
|
if (send_fence) {
|
|
vmw_fifo_send_fence(man->dev_priv, &dummy);
|
|
wake_up_all(&man->idle_queue);
|
|
}
|
|
|
|
mutex_unlock(&man->error_mutex);
|
|
}
|
|
|
|
/**
|
|
* vmw_cmdbuf_man idle - Check whether the command buffer manager is idle.
|
|
*
|
|
* @man: The command buffer manager.
|
|
* @check_preempted: Check also the preempted queue for pending command buffers.
|
|
*
|
|
*/
|
|
static bool vmw_cmdbuf_man_idle(struct vmw_cmdbuf_man *man,
|
|
bool check_preempted)
|
|
{
|
|
struct vmw_cmdbuf_context *ctx;
|
|
bool idle = false;
|
|
int i;
|
|
|
|
spin_lock(&man->lock);
|
|
vmw_cmdbuf_man_process(man);
|
|
for_each_cmdbuf_ctx(man, i, ctx) {
|
|
if (!list_empty(&ctx->submitted) ||
|
|
!list_empty(&ctx->hw_submitted) ||
|
|
(check_preempted && !list_empty(&ctx->preempted)))
|
|
goto out_unlock;
|
|
}
|
|
|
|
idle = list_empty(&man->error);
|
|
|
|
out_unlock:
|
|
spin_unlock(&man->lock);
|
|
|
|
return idle;
|
|
}
|
|
|
|
/**
|
|
* __vmw_cmdbuf_cur_flush - Flush the current command buffer for small kernel
|
|
* command submissions
|
|
*
|
|
* @man: The command buffer manager.
|
|
*
|
|
* Flushes the current command buffer without allocating a new one. A new one
|
|
* is automatically allocated when needed. Call with @man->cur_mutex held.
|
|
*/
|
|
static void __vmw_cmdbuf_cur_flush(struct vmw_cmdbuf_man *man)
|
|
{
|
|
struct vmw_cmdbuf_header *cur = man->cur;
|
|
|
|
lockdep_assert_held_once(&man->cur_mutex);
|
|
|
|
if (!cur)
|
|
return;
|
|
|
|
spin_lock(&man->lock);
|
|
if (man->cur_pos == 0) {
|
|
__vmw_cmdbuf_header_free(cur);
|
|
goto out_unlock;
|
|
}
|
|
|
|
man->cur->cb_header->length = man->cur_pos;
|
|
vmw_cmdbuf_ctx_add(man, man->cur, SVGA_CB_CONTEXT_0);
|
|
out_unlock:
|
|
spin_unlock(&man->lock);
|
|
man->cur = NULL;
|
|
man->cur_pos = 0;
|
|
}
|
|
|
|
/**
|
|
* vmw_cmdbuf_cur_flush - Flush the current command buffer for small kernel
|
|
* command submissions
|
|
*
|
|
* @man: The command buffer manager.
|
|
* @interruptible: Whether to sleep interruptible when sleeping.
|
|
*
|
|
* Flushes the current command buffer without allocating a new one. A new one
|
|
* is automatically allocated when needed.
|
|
*/
|
|
int vmw_cmdbuf_cur_flush(struct vmw_cmdbuf_man *man,
|
|
bool interruptible)
|
|
{
|
|
int ret = vmw_cmdbuf_cur_lock(man, interruptible);
|
|
|
|
if (ret)
|
|
return ret;
|
|
|
|
__vmw_cmdbuf_cur_flush(man);
|
|
vmw_cmdbuf_cur_unlock(man);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* vmw_cmdbuf_idle - Wait for command buffer manager idle.
|
|
*
|
|
* @man: The command buffer manager.
|
|
* @interruptible: Sleep interruptible while waiting.
|
|
* @timeout: Time out after this many ticks.
|
|
*
|
|
* Wait until the command buffer manager has processed all command buffers,
|
|
* or until a timeout occurs. If a timeout occurs, the function will return
|
|
* -EBUSY.
|
|
*/
|
|
int vmw_cmdbuf_idle(struct vmw_cmdbuf_man *man, bool interruptible,
|
|
unsigned long timeout)
|
|
{
|
|
int ret;
|
|
|
|
ret = vmw_cmdbuf_cur_flush(man, interruptible);
|
|
vmw_generic_waiter_add(man->dev_priv,
|
|
SVGA_IRQFLAG_COMMAND_BUFFER,
|
|
&man->dev_priv->cmdbuf_waiters);
|
|
|
|
if (interruptible) {
|
|
ret = wait_event_interruptible_timeout
|
|
(man->idle_queue, vmw_cmdbuf_man_idle(man, true),
|
|
timeout);
|
|
} else {
|
|
ret = wait_event_timeout
|
|
(man->idle_queue, vmw_cmdbuf_man_idle(man, true),
|
|
timeout);
|
|
}
|
|
vmw_generic_waiter_remove(man->dev_priv,
|
|
SVGA_IRQFLAG_COMMAND_BUFFER,
|
|
&man->dev_priv->cmdbuf_waiters);
|
|
if (ret == 0) {
|
|
if (!vmw_cmdbuf_man_idle(man, true))
|
|
ret = -EBUSY;
|
|
else
|
|
ret = 0;
|
|
}
|
|
if (ret > 0)
|
|
ret = 0;
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* vmw_cmdbuf_try_alloc - Try to allocate buffer space from the main pool.
|
|
*
|
|
* @man: The command buffer manager.
|
|
* @info: Allocation info. Will hold the size on entry and allocated mm node
|
|
* on successful return.
|
|
*
|
|
* Try to allocate buffer space from the main pool. Returns true if succeeded.
|
|
* If a fatal error was hit, the error code is returned in @info->ret.
|
|
*/
|
|
static bool vmw_cmdbuf_try_alloc(struct vmw_cmdbuf_man *man,
|
|
struct vmw_cmdbuf_alloc_info *info)
|
|
{
|
|
int ret;
|
|
|
|
if (info->done)
|
|
return true;
|
|
|
|
memset(info->node, 0, sizeof(*info->node));
|
|
spin_lock(&man->lock);
|
|
ret = drm_mm_insert_node(&man->mm, info->node, info->page_size);
|
|
if (ret) {
|
|
vmw_cmdbuf_man_process(man);
|
|
ret = drm_mm_insert_node(&man->mm, info->node, info->page_size);
|
|
}
|
|
|
|
spin_unlock(&man->lock);
|
|
info->done = !ret;
|
|
|
|
return info->done;
|
|
}
|
|
|
|
/**
|
|
* vmw_cmdbuf_alloc_space - Allocate buffer space from the main pool.
|
|
*
|
|
* @man: The command buffer manager.
|
|
* @node: Pointer to pre-allocated range-manager node.
|
|
* @size: The size of the allocation.
|
|
* @interruptible: Whether to sleep interruptible while waiting for space.
|
|
*
|
|
* This function allocates buffer space from the main pool, and if there is
|
|
* no space available ATM, it turns on IRQ handling and sleeps waiting for it to
|
|
* become available.
|
|
*/
|
|
static int vmw_cmdbuf_alloc_space(struct vmw_cmdbuf_man *man,
|
|
struct drm_mm_node *node,
|
|
size_t size,
|
|
bool interruptible)
|
|
{
|
|
struct vmw_cmdbuf_alloc_info info;
|
|
|
|
info.page_size = PAGE_ALIGN(size) >> PAGE_SHIFT;
|
|
info.node = node;
|
|
info.done = false;
|
|
|
|
/*
|
|
* To prevent starvation of large requests, only one allocating call
|
|
* at a time waiting for space.
|
|
*/
|
|
if (interruptible) {
|
|
if (mutex_lock_interruptible(&man->space_mutex))
|
|
return -ERESTARTSYS;
|
|
} else {
|
|
mutex_lock(&man->space_mutex);
|
|
}
|
|
|
|
/* Try to allocate space without waiting. */
|
|
if (vmw_cmdbuf_try_alloc(man, &info))
|
|
goto out_unlock;
|
|
|
|
vmw_generic_waiter_add(man->dev_priv,
|
|
SVGA_IRQFLAG_COMMAND_BUFFER,
|
|
&man->dev_priv->cmdbuf_waiters);
|
|
|
|
if (interruptible) {
|
|
int ret;
|
|
|
|
ret = wait_event_interruptible
|
|
(man->alloc_queue, vmw_cmdbuf_try_alloc(man, &info));
|
|
if (ret) {
|
|
vmw_generic_waiter_remove
|
|
(man->dev_priv, SVGA_IRQFLAG_COMMAND_BUFFER,
|
|
&man->dev_priv->cmdbuf_waiters);
|
|
mutex_unlock(&man->space_mutex);
|
|
return ret;
|
|
}
|
|
} else {
|
|
wait_event(man->alloc_queue, vmw_cmdbuf_try_alloc(man, &info));
|
|
}
|
|
vmw_generic_waiter_remove(man->dev_priv,
|
|
SVGA_IRQFLAG_COMMAND_BUFFER,
|
|
&man->dev_priv->cmdbuf_waiters);
|
|
|
|
out_unlock:
|
|
mutex_unlock(&man->space_mutex);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* vmw_cmdbuf_space_pool - Set up a command buffer header with command buffer
|
|
* space from the main pool.
|
|
*
|
|
* @man: The command buffer manager.
|
|
* @header: Pointer to the header to set up.
|
|
* @size: The requested size of the buffer space.
|
|
* @interruptible: Whether to sleep interruptible while waiting for space.
|
|
*/
|
|
static int vmw_cmdbuf_space_pool(struct vmw_cmdbuf_man *man,
|
|
struct vmw_cmdbuf_header *header,
|
|
size_t size,
|
|
bool interruptible)
|
|
{
|
|
SVGACBHeader *cb_hdr;
|
|
size_t offset;
|
|
int ret;
|
|
|
|
if (!man->has_pool)
|
|
return -ENOMEM;
|
|
|
|
ret = vmw_cmdbuf_alloc_space(man, &header->node, size, interruptible);
|
|
|
|
if (ret)
|
|
return ret;
|
|
|
|
header->cb_header = dma_pool_zalloc(man->headers, GFP_KERNEL,
|
|
&header->handle);
|
|
if (!header->cb_header) {
|
|
ret = -ENOMEM;
|
|
goto out_no_cb_header;
|
|
}
|
|
|
|
header->size = header->node.size << PAGE_SHIFT;
|
|
cb_hdr = header->cb_header;
|
|
offset = header->node.start << PAGE_SHIFT;
|
|
header->cmd = man->map + offset;
|
|
if (man->using_mob) {
|
|
cb_hdr->flags = SVGA_CB_FLAG_MOB;
|
|
cb_hdr->ptr.mob.mobid = man->cmd_space->mem.start;
|
|
cb_hdr->ptr.mob.mobOffset = offset;
|
|
} else {
|
|
cb_hdr->ptr.pa = (u64)man->handle + (u64)offset;
|
|
}
|
|
|
|
return 0;
|
|
|
|
out_no_cb_header:
|
|
spin_lock(&man->lock);
|
|
drm_mm_remove_node(&header->node);
|
|
spin_unlock(&man->lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* vmw_cmdbuf_space_inline - Set up a command buffer header with
|
|
* inline command buffer space.
|
|
*
|
|
* @man: The command buffer manager.
|
|
* @header: Pointer to the header to set up.
|
|
* @size: The requested size of the buffer space.
|
|
*/
|
|
static int vmw_cmdbuf_space_inline(struct vmw_cmdbuf_man *man,
|
|
struct vmw_cmdbuf_header *header,
|
|
int size)
|
|
{
|
|
struct vmw_cmdbuf_dheader *dheader;
|
|
SVGACBHeader *cb_hdr;
|
|
|
|
if (WARN_ON_ONCE(size > VMW_CMDBUF_INLINE_SIZE))
|
|
return -ENOMEM;
|
|
|
|
dheader = dma_pool_zalloc(man->dheaders, GFP_KERNEL,
|
|
&header->handle);
|
|
if (!dheader)
|
|
return -ENOMEM;
|
|
|
|
header->inline_space = true;
|
|
header->size = VMW_CMDBUF_INLINE_SIZE;
|
|
cb_hdr = &dheader->cb_header;
|
|
header->cb_header = cb_hdr;
|
|
header->cmd = dheader->cmd;
|
|
cb_hdr->status = SVGA_CB_STATUS_NONE;
|
|
cb_hdr->flags = SVGA_CB_FLAG_NONE;
|
|
cb_hdr->ptr.pa = (u64)header->handle +
|
|
(u64)offsetof(struct vmw_cmdbuf_dheader, cmd);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* vmw_cmdbuf_alloc - Allocate a command buffer header complete with
|
|
* command buffer space.
|
|
*
|
|
* @man: The command buffer manager.
|
|
* @size: The requested size of the buffer space.
|
|
* @interruptible: Whether to sleep interruptible while waiting for space.
|
|
* @p_header: points to a header pointer to populate on successful return.
|
|
*
|
|
* Returns a pointer to command buffer space if successful. Otherwise
|
|
* returns an error pointer. The header pointer returned in @p_header should
|
|
* be used for upcoming calls to vmw_cmdbuf_reserve() and vmw_cmdbuf_commit().
|
|
*/
|
|
void *vmw_cmdbuf_alloc(struct vmw_cmdbuf_man *man,
|
|
size_t size, bool interruptible,
|
|
struct vmw_cmdbuf_header **p_header)
|
|
{
|
|
struct vmw_cmdbuf_header *header;
|
|
int ret = 0;
|
|
|
|
*p_header = NULL;
|
|
|
|
header = kzalloc(sizeof(*header), GFP_KERNEL);
|
|
if (!header)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
if (size <= VMW_CMDBUF_INLINE_SIZE)
|
|
ret = vmw_cmdbuf_space_inline(man, header, size);
|
|
else
|
|
ret = vmw_cmdbuf_space_pool(man, header, size, interruptible);
|
|
|
|
if (ret) {
|
|
kfree(header);
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
header->man = man;
|
|
INIT_LIST_HEAD(&header->list);
|
|
header->cb_header->status = SVGA_CB_STATUS_NONE;
|
|
*p_header = header;
|
|
|
|
return header->cmd;
|
|
}
|
|
|
|
/**
|
|
* vmw_cmdbuf_reserve_cur - Reserve space for commands in the current
|
|
* command buffer.
|
|
*
|
|
* @man: The command buffer manager.
|
|
* @size: The requested size of the commands.
|
|
* @ctx_id: The context id if any. Otherwise set to SVGA3D_REG_INVALID.
|
|
* @interruptible: Whether to sleep interruptible while waiting for space.
|
|
*
|
|
* Returns a pointer to command buffer space if successful. Otherwise
|
|
* returns an error pointer.
|
|
*/
|
|
static void *vmw_cmdbuf_reserve_cur(struct vmw_cmdbuf_man *man,
|
|
size_t size,
|
|
int ctx_id,
|
|
bool interruptible)
|
|
{
|
|
struct vmw_cmdbuf_header *cur;
|
|
void *ret;
|
|
|
|
if (vmw_cmdbuf_cur_lock(man, interruptible))
|
|
return ERR_PTR(-ERESTARTSYS);
|
|
|
|
cur = man->cur;
|
|
if (cur && (size + man->cur_pos > cur->size ||
|
|
((cur->cb_header->flags & SVGA_CB_FLAG_DX_CONTEXT) &&
|
|
ctx_id != cur->cb_header->dxContext)))
|
|
__vmw_cmdbuf_cur_flush(man);
|
|
|
|
if (!man->cur) {
|
|
ret = vmw_cmdbuf_alloc(man,
|
|
max_t(size_t, size, man->default_size),
|
|
interruptible, &man->cur);
|
|
if (IS_ERR(ret)) {
|
|
vmw_cmdbuf_cur_unlock(man);
|
|
return ret;
|
|
}
|
|
|
|
cur = man->cur;
|
|
}
|
|
|
|
if (ctx_id != SVGA3D_INVALID_ID) {
|
|
cur->cb_header->flags |= SVGA_CB_FLAG_DX_CONTEXT;
|
|
cur->cb_header->dxContext = ctx_id;
|
|
}
|
|
|
|
cur->reserved = size;
|
|
|
|
return (void *) (man->cur->cmd + man->cur_pos);
|
|
}
|
|
|
|
/**
|
|
* vmw_cmdbuf_commit_cur - Commit commands in the current command buffer.
|
|
*
|
|
* @man: The command buffer manager.
|
|
* @size: The size of the commands actually written.
|
|
* @flush: Whether to flush the command buffer immediately.
|
|
*/
|
|
static void vmw_cmdbuf_commit_cur(struct vmw_cmdbuf_man *man,
|
|
size_t size, bool flush)
|
|
{
|
|
struct vmw_cmdbuf_header *cur = man->cur;
|
|
|
|
lockdep_assert_held_once(&man->cur_mutex);
|
|
|
|
WARN_ON(size > cur->reserved);
|
|
man->cur_pos += size;
|
|
if (!size)
|
|
cur->cb_header->flags &= ~SVGA_CB_FLAG_DX_CONTEXT;
|
|
if (flush)
|
|
__vmw_cmdbuf_cur_flush(man);
|
|
vmw_cmdbuf_cur_unlock(man);
|
|
}
|
|
|
|
/**
|
|
* vmw_cmdbuf_reserve - Reserve space for commands in a command buffer.
|
|
*
|
|
* @man: The command buffer manager.
|
|
* @size: The requested size of the commands.
|
|
* @ctx_id: The context id if any. Otherwise set to SVGA3D_REG_INVALID.
|
|
* @interruptible: Whether to sleep interruptible while waiting for space.
|
|
* @header: Header of the command buffer. NULL if the current command buffer
|
|
* should be used.
|
|
*
|
|
* Returns a pointer to command buffer space if successful. Otherwise
|
|
* returns an error pointer.
|
|
*/
|
|
void *vmw_cmdbuf_reserve(struct vmw_cmdbuf_man *man, size_t size,
|
|
int ctx_id, bool interruptible,
|
|
struct vmw_cmdbuf_header *header)
|
|
{
|
|
if (!header)
|
|
return vmw_cmdbuf_reserve_cur(man, size, ctx_id, interruptible);
|
|
|
|
if (size > header->size)
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
if (ctx_id != SVGA3D_INVALID_ID) {
|
|
header->cb_header->flags |= SVGA_CB_FLAG_DX_CONTEXT;
|
|
header->cb_header->dxContext = ctx_id;
|
|
}
|
|
|
|
header->reserved = size;
|
|
return header->cmd;
|
|
}
|
|
|
|
/**
|
|
* vmw_cmdbuf_commit - Commit commands in a command buffer.
|
|
*
|
|
* @man: The command buffer manager.
|
|
* @size: The size of the commands actually written.
|
|
* @header: Header of the command buffer. NULL if the current command buffer
|
|
* should be used.
|
|
* @flush: Whether to flush the command buffer immediately.
|
|
*/
|
|
void vmw_cmdbuf_commit(struct vmw_cmdbuf_man *man, size_t size,
|
|
struct vmw_cmdbuf_header *header, bool flush)
|
|
{
|
|
if (!header) {
|
|
vmw_cmdbuf_commit_cur(man, size, flush);
|
|
return;
|
|
}
|
|
|
|
(void) vmw_cmdbuf_cur_lock(man, false);
|
|
__vmw_cmdbuf_cur_flush(man);
|
|
WARN_ON(size > header->reserved);
|
|
man->cur = header;
|
|
man->cur_pos = size;
|
|
if (!size)
|
|
header->cb_header->flags &= ~SVGA_CB_FLAG_DX_CONTEXT;
|
|
if (flush)
|
|
__vmw_cmdbuf_cur_flush(man);
|
|
vmw_cmdbuf_cur_unlock(man);
|
|
}
|
|
|
|
|
|
/**
|
|
* vmw_cmdbuf_send_device_command - Send a command through the device context.
|
|
*
|
|
* @man: The command buffer manager.
|
|
* @command: Pointer to the command to send.
|
|
* @size: Size of the command.
|
|
*
|
|
* Synchronously sends a device context command.
|
|
*/
|
|
static int vmw_cmdbuf_send_device_command(struct vmw_cmdbuf_man *man,
|
|
const void *command,
|
|
size_t size)
|
|
{
|
|
struct vmw_cmdbuf_header *header;
|
|
int status;
|
|
void *cmd = vmw_cmdbuf_alloc(man, size, false, &header);
|
|
|
|
if (IS_ERR(cmd))
|
|
return PTR_ERR(cmd);
|
|
|
|
memcpy(cmd, command, size);
|
|
header->cb_header->length = size;
|
|
header->cb_context = SVGA_CB_CONTEXT_DEVICE;
|
|
spin_lock(&man->lock);
|
|
status = vmw_cmdbuf_header_submit(header);
|
|
spin_unlock(&man->lock);
|
|
vmw_cmdbuf_header_free(header);
|
|
|
|
if (status != SVGA_CB_STATUS_COMPLETED) {
|
|
DRM_ERROR("Device context command failed with status %d\n",
|
|
status);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* vmw_cmdbuf_preempt - Send a preempt command through the device
|
|
* context.
|
|
*
|
|
* @man: The command buffer manager.
|
|
*
|
|
* Synchronously sends a preempt command.
|
|
*/
|
|
static int vmw_cmdbuf_preempt(struct vmw_cmdbuf_man *man, u32 context)
|
|
{
|
|
struct {
|
|
uint32 id;
|
|
SVGADCCmdPreempt body;
|
|
} __packed cmd;
|
|
|
|
cmd.id = SVGA_DC_CMD_PREEMPT;
|
|
cmd.body.context = SVGA_CB_CONTEXT_0 + context;
|
|
cmd.body.ignoreIDZero = 0;
|
|
|
|
return vmw_cmdbuf_send_device_command(man, &cmd, sizeof(cmd));
|
|
}
|
|
|
|
|
|
/**
|
|
* vmw_cmdbuf_startstop - Send a start / stop command through the device
|
|
* context.
|
|
*
|
|
* @man: The command buffer manager.
|
|
* @enable: Whether to enable or disable the context.
|
|
*
|
|
* Synchronously sends a device start / stop context command.
|
|
*/
|
|
static int vmw_cmdbuf_startstop(struct vmw_cmdbuf_man *man, u32 context,
|
|
bool enable)
|
|
{
|
|
struct {
|
|
uint32 id;
|
|
SVGADCCmdStartStop body;
|
|
} __packed cmd;
|
|
|
|
cmd.id = SVGA_DC_CMD_START_STOP_CONTEXT;
|
|
cmd.body.enable = (enable) ? 1 : 0;
|
|
cmd.body.context = SVGA_CB_CONTEXT_0 + context;
|
|
|
|
return vmw_cmdbuf_send_device_command(man, &cmd, sizeof(cmd));
|
|
}
|
|
|
|
/**
|
|
* vmw_cmdbuf_set_pool_size - Set command buffer manager sizes
|
|
*
|
|
* @man: The command buffer manager.
|
|
* @size: The size of the main space pool.
|
|
* @default_size: The default size of the command buffer for small kernel
|
|
* submissions.
|
|
*
|
|
* Set the size and allocate the main command buffer space pool,
|
|
* as well as the default size of the command buffer for
|
|
* small kernel submissions. If successful, this enables large command
|
|
* submissions. Note that this function requires that rudimentary command
|
|
* submission is already available and that the MOB memory manager is alive.
|
|
* Returns 0 on success. Negative error code on failure.
|
|
*/
|
|
int vmw_cmdbuf_set_pool_size(struct vmw_cmdbuf_man *man,
|
|
size_t size, size_t default_size)
|
|
{
|
|
struct vmw_private *dev_priv = man->dev_priv;
|
|
bool dummy;
|
|
int ret;
|
|
|
|
if (man->has_pool)
|
|
return -EINVAL;
|
|
|
|
/* First, try to allocate a huge chunk of DMA memory */
|
|
size = PAGE_ALIGN(size);
|
|
man->map = dma_alloc_coherent(&dev_priv->dev->pdev->dev, size,
|
|
&man->handle, GFP_KERNEL);
|
|
if (man->map) {
|
|
man->using_mob = false;
|
|
} else {
|
|
/*
|
|
* DMA memory failed. If we can have command buffers in a
|
|
* MOB, try to use that instead. Note that this will
|
|
* actually call into the already enabled manager, when
|
|
* binding the MOB.
|
|
*/
|
|
if (!(dev_priv->capabilities & SVGA_CAP_DX) ||
|
|
!dev_priv->has_mob)
|
|
return -ENOMEM;
|
|
|
|
ret = ttm_bo_create(&dev_priv->bdev, size, ttm_bo_type_device,
|
|
&vmw_mob_ne_placement, 0, false,
|
|
&man->cmd_space);
|
|
if (ret)
|
|
return ret;
|
|
|
|
man->using_mob = true;
|
|
ret = ttm_bo_kmap(man->cmd_space, 0, size >> PAGE_SHIFT,
|
|
&man->map_obj);
|
|
if (ret)
|
|
goto out_no_map;
|
|
|
|
man->map = ttm_kmap_obj_virtual(&man->map_obj, &dummy);
|
|
}
|
|
|
|
man->size = size;
|
|
drm_mm_init(&man->mm, 0, size >> PAGE_SHIFT);
|
|
|
|
man->has_pool = true;
|
|
|
|
/*
|
|
* For now, set the default size to VMW_CMDBUF_INLINE_SIZE to
|
|
* prevent deadlocks from happening when vmw_cmdbuf_space_pool()
|
|
* needs to wait for space and we block on further command
|
|
* submissions to be able to free up space.
|
|
*/
|
|
man->default_size = VMW_CMDBUF_INLINE_SIZE;
|
|
DRM_INFO("Using command buffers with %s pool.\n",
|
|
(man->using_mob) ? "MOB" : "DMA");
|
|
|
|
return 0;
|
|
|
|
out_no_map:
|
|
if (man->using_mob) {
|
|
ttm_bo_put(man->cmd_space);
|
|
man->cmd_space = NULL;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* vmw_cmdbuf_man_create: Create a command buffer manager and enable it for
|
|
* inline command buffer submissions only.
|
|
*
|
|
* @dev_priv: Pointer to device private structure.
|
|
*
|
|
* Returns a pointer to a cummand buffer manager to success or error pointer
|
|
* on failure. The command buffer manager will be enabled for submissions of
|
|
* size VMW_CMDBUF_INLINE_SIZE only.
|
|
*/
|
|
struct vmw_cmdbuf_man *vmw_cmdbuf_man_create(struct vmw_private *dev_priv)
|
|
{
|
|
struct vmw_cmdbuf_man *man;
|
|
struct vmw_cmdbuf_context *ctx;
|
|
unsigned int i;
|
|
int ret;
|
|
|
|
if (!(dev_priv->capabilities & SVGA_CAP_COMMAND_BUFFERS))
|
|
return ERR_PTR(-ENOSYS);
|
|
|
|
man = kzalloc(sizeof(*man), GFP_KERNEL);
|
|
if (!man)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
man->num_contexts = (dev_priv->capabilities & SVGA_CAP_HP_CMD_QUEUE) ?
|
|
2 : 1;
|
|
man->headers = dma_pool_create("vmwgfx cmdbuf",
|
|
&dev_priv->dev->pdev->dev,
|
|
sizeof(SVGACBHeader),
|
|
64, PAGE_SIZE);
|
|
if (!man->headers) {
|
|
ret = -ENOMEM;
|
|
goto out_no_pool;
|
|
}
|
|
|
|
man->dheaders = dma_pool_create("vmwgfx inline cmdbuf",
|
|
&dev_priv->dev->pdev->dev,
|
|
sizeof(struct vmw_cmdbuf_dheader),
|
|
64, PAGE_SIZE);
|
|
if (!man->dheaders) {
|
|
ret = -ENOMEM;
|
|
goto out_no_dpool;
|
|
}
|
|
|
|
for_each_cmdbuf_ctx(man, i, ctx)
|
|
vmw_cmdbuf_ctx_init(ctx);
|
|
|
|
INIT_LIST_HEAD(&man->error);
|
|
spin_lock_init(&man->lock);
|
|
mutex_init(&man->cur_mutex);
|
|
mutex_init(&man->space_mutex);
|
|
mutex_init(&man->error_mutex);
|
|
man->default_size = VMW_CMDBUF_INLINE_SIZE;
|
|
init_waitqueue_head(&man->alloc_queue);
|
|
init_waitqueue_head(&man->idle_queue);
|
|
man->dev_priv = dev_priv;
|
|
man->max_hw_submitted = SVGA_CB_MAX_QUEUED_PER_CONTEXT - 1;
|
|
INIT_WORK(&man->work, &vmw_cmdbuf_work_func);
|
|
vmw_generic_waiter_add(dev_priv, SVGA_IRQFLAG_ERROR,
|
|
&dev_priv->error_waiters);
|
|
ret = vmw_cmdbuf_startstop(man, 0, true);
|
|
if (ret) {
|
|
DRM_ERROR("Failed starting command buffer contexts\n");
|
|
vmw_cmdbuf_man_destroy(man);
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
return man;
|
|
|
|
out_no_dpool:
|
|
dma_pool_destroy(man->headers);
|
|
out_no_pool:
|
|
kfree(man);
|
|
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
/**
|
|
* vmw_cmdbuf_remove_pool - Take down the main buffer space pool.
|
|
*
|
|
* @man: Pointer to a command buffer manager.
|
|
*
|
|
* This function removes the main buffer space pool, and should be called
|
|
* before MOB memory management is removed. When this function has been called,
|
|
* only small command buffer submissions of size VMW_CMDBUF_INLINE_SIZE or
|
|
* less are allowed, and the default size of the command buffer for small kernel
|
|
* submissions is also set to this size.
|
|
*/
|
|
void vmw_cmdbuf_remove_pool(struct vmw_cmdbuf_man *man)
|
|
{
|
|
if (!man->has_pool)
|
|
return;
|
|
|
|
man->has_pool = false;
|
|
man->default_size = VMW_CMDBUF_INLINE_SIZE;
|
|
(void) vmw_cmdbuf_idle(man, false, 10*HZ);
|
|
if (man->using_mob) {
|
|
(void) ttm_bo_kunmap(&man->map_obj);
|
|
ttm_bo_put(man->cmd_space);
|
|
man->cmd_space = NULL;
|
|
} else {
|
|
dma_free_coherent(&man->dev_priv->dev->pdev->dev,
|
|
man->size, man->map, man->handle);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* vmw_cmdbuf_man_destroy - Take down a command buffer manager.
|
|
*
|
|
* @man: Pointer to a command buffer manager.
|
|
*
|
|
* This function idles and then destroys a command buffer manager.
|
|
*/
|
|
void vmw_cmdbuf_man_destroy(struct vmw_cmdbuf_man *man)
|
|
{
|
|
WARN_ON_ONCE(man->has_pool);
|
|
(void) vmw_cmdbuf_idle(man, false, 10*HZ);
|
|
|
|
if (vmw_cmdbuf_startstop(man, 0, false))
|
|
DRM_ERROR("Failed stopping command buffer contexts.\n");
|
|
|
|
vmw_generic_waiter_remove(man->dev_priv, SVGA_IRQFLAG_ERROR,
|
|
&man->dev_priv->error_waiters);
|
|
(void) cancel_work_sync(&man->work);
|
|
dma_pool_destroy(man->dheaders);
|
|
dma_pool_destroy(man->headers);
|
|
mutex_destroy(&man->cur_mutex);
|
|
mutex_destroy(&man->space_mutex);
|
|
mutex_destroy(&man->error_mutex);
|
|
kfree(man);
|
|
}
|