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drm/vc4: Add support for drawing 3D frames. 

The user submission is basically a pointer to a command list and a
pointer to uniforms.  We copy those in to the kernel, validate and
relocate them, and store the result in a GPU BO which we queue for
execution.

v2: Drop support for NV shader recs (not necessary for GL), simplify
    vc4_use_bo(), improve bin flush/semaphore checks, use __u32 style
    types.

Signed-off-by: Eric Anholt <eric@anholt.net>
hifive-unleashed-5.1
Eric Anholt 2015-11-30 12:13:37 -08:00
parent d3f5168a08
commit d5b1a78a77
12 changed files with 3243 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/gpu/drm/vc4/Makefile
View File

@ -8,12 +8,19 @@ vc4-y := \
vc4_crtc.o \
vc4_drv.o \
vc4_kms.o \
vc4_gem.o \
vc4_hdmi.o \
vc4_hvs.o \
vc4_irq.o \
vc4_plane.o \
vc4_render_cl.o \
vc4_trace_points.o \
vc4_v3d.o \
vc4_validate.o \
vc4_validate_shaders.o
vc4-$(CONFIG_DEBUG_FS) += vc4_debugfs.o
obj-$(CONFIG_DRM_VC4) += vc4.o
CFLAGS_vc4_trace_points.o := -I$(src)

15
drivers/gpu/drm/vc4/vc4_drv.c
View File

@ -74,6 +74,9 @@ static const struct file_operations vc4_drm_fops = {
};
static const struct drm_ioctl_desc vc4_drm_ioctls[] = {
DRM_IOCTL_DEF_DRV(VC4_SUBMIT_CL, vc4_submit_cl_ioctl, 0),
DRM_IOCTL_DEF_DRV(VC4_WAIT_SEQNO, vc4_wait_seqno_ioctl, 0),
DRM_IOCTL_DEF_DRV(VC4_WAIT_BO, vc4_wait_bo_ioctl, 0),
DRM_IOCTL_DEF_DRV(VC4_CREATE_BO, vc4_create_bo_ioctl, 0),
DRM_IOCTL_DEF_DRV(VC4_MMAP_BO, vc4_mmap_bo_ioctl, 0),
DRM_IOCTL_DEF_DRV(VC4_CREATE_SHADER_BO, vc4_create_shader_bo_ioctl, 0),
@ -83,10 +86,16 @@ static struct drm_driver vc4_drm_driver = {
.driver_features = (DRIVER_MODESET |
DRIVER_ATOMIC |
DRIVER_GEM |
DRIVER_HAVE_IRQ |
DRIVER_PRIME),
.lastclose = vc4_lastclose,
.preclose = vc4_drm_preclose,
.irq_handler = vc4_irq,
.irq_preinstall = vc4_irq_preinstall,
.irq_postinstall = vc4_irq_postinstall,
.irq_uninstall = vc4_irq_uninstall,
.enable_vblank = vc4_enable_vblank,
.disable_vblank = vc4_disable_vblank,
.get_vblank_counter = drm_vblank_count,
@ -181,9 +190,11 @@ static int vc4_drm_bind(struct device *dev)
if (ret)
goto unref;
vc4_gem_init(drm);
ret = component_bind_all(dev, drm);
if (ret)
goto unref;
goto gem_destroy;
ret = drm_dev_register(drm, 0);
if (ret < 0)
@ -207,6 +218,8 @@ unregister:
drm_dev_unregister(drm);
unbind_all:
component_unbind_all(dev, drm);
gem_destroy:
vc4_gem_destroy(drm);
unref:
drm_dev_unref(drm);
vc4_bo_cache_destroy(drm);

182
drivers/gpu/drm/vc4/vc4_drv.h
View File

@ -49,6 +49,48 @@ struct vc4_dev {
/* Protects bo_cache and the BO stats. */
struct mutex bo_lock;
/* Sequence number for the last job queued in job_list.
* Starts at 0 (no jobs emitted).
*/
uint64_t emit_seqno;
/* Sequence number for the last completed job on the GPU.
* Starts at 0 (no jobs completed).
*/
uint64_t finished_seqno;
/* List of all struct vc4_exec_info for jobs to be executed.
* The first job in the list is the one currently programmed
* into ct0ca/ct1ca for execution.
*/
struct list_head job_list;
/* List of the finished vc4_exec_infos waiting to be freed by
* job_done_work.
*/
struct list_head job_done_list;
/* Spinlock used to synchronize the job_list and seqno
* accesses between the IRQ handler and GEM ioctls.
*/
spinlock_t job_lock;
wait_queue_head_t job_wait_queue;
struct work_struct job_done_work;
/* The binner overflow memory that's currently set up in
* BPOA/BPOS registers. When overflow occurs and a new one is
* allocated, the previous one will be moved to
* vc4->current_exec's free list.
*/
struct vc4_bo *overflow_mem;
struct work_struct overflow_mem_work;
struct {
uint32_t last_ct0ca, last_ct1ca;
struct timer_list timer;
struct work_struct reset_work;
} hangcheck;
struct semaphore async_modeset;
};
static inline struct vc4_dev *
@ -60,6 +102,9 @@ to_vc4_dev(struct drm_device *dev)
struct vc4_bo {
struct drm_gem_cma_object base;
/* seqno of the last job to render to this BO. */
uint64_t seqno;
/* List entry for the BO's position in either
* vc4_exec_info->unref_list or vc4_dev->bo_cache.time_list
*/
@ -130,6 +175,101 @@ to_vc4_encoder(struct drm_encoder *encoder)
#define HVS_READ(offset) readl(vc4->hvs->regs + offset)
#define HVS_WRITE(offset, val) writel(val, vc4->hvs->regs + offset)
struct vc4_exec_info {
/* Sequence number for this bin/render job. */
uint64_t seqno;
/* Kernel-space copy of the ioctl arguments */
struct drm_vc4_submit_cl *args;
/* This is the array of BOs that were looked up at the start of exec.
* Command validation will use indices into this array.
*/
struct drm_gem_cma_object **bo;
uint32_t bo_count;
/* Pointers for our position in vc4->job_list */
struct list_head head;
/* List of other BOs used in the job that need to be released
* once the job is complete.
*/
struct list_head unref_list;
/* Current unvalidated indices into @bo loaded by the non-hardware
* VC4_PACKET_GEM_HANDLES.
*/
uint32_t bo_index[2];
/* This is the BO where we store the validated command lists, shader
* records, and uniforms.
*/
struct drm_gem_cma_object *exec_bo;
/**
* This tracks the per-shader-record state (packet 64) that
* determines the length of the shader record and the offset
* it's expected to be found at. It gets read in from the
* command lists.
*/
struct vc4_shader_state {
uint32_t addr;
/* Maximum vertex index referenced by any primitive using this
* shader state.
*/
uint32_t max_index;
} *shader_state;
/** How many shader states the user declared they were using. */
uint32_t shader_state_size;
/** How many shader state records the validator has seen. */
uint32_t shader_state_count;
bool found_tile_binning_mode_config_packet;
bool found_start_tile_binning_packet;
bool found_increment_semaphore_packet;
bool found_flush;
uint8_t bin_tiles_x, bin_tiles_y;
struct drm_gem_cma_object *tile_bo;
uint32_t tile_alloc_offset;
/**
* Computed addresses pointing into exec_bo where we start the
* bin thread (ct0) and render thread (ct1).
*/
uint32_t ct0ca, ct0ea;
uint32_t ct1ca, ct1ea;
/* Pointer to the unvalidated bin CL (if present). */
void *bin_u;
/* Pointers to the shader recs. These paddr gets incremented as CL
* packets are relocated in validate_gl_shader_state, and the vaddrs
* (u and v) get incremented and size decremented as the shader recs
* themselves are validated.
*/
void *shader_rec_u;
void *shader_rec_v;
uint32_t shader_rec_p;
uint32_t shader_rec_size;
/* Pointers to the uniform data. These pointers are incremented, and
* size decremented, as each batch of uniforms is uploaded.
*/
void *uniforms_u;
void *uniforms_v;
uint32_t uniforms_p;
uint32_t uniforms_size;
};
static inline struct vc4_exec_info *
vc4_first_job(struct vc4_dev *vc4)
{
if (list_empty(&vc4->job_list))
return NULL;
return list_first_entry(&vc4->job_list, struct vc4_exec_info, head);
}
/**
* struct vc4_texture_sample_info - saves the offsets into the UBO for texture
* setup parameters.
@ -231,10 +371,31 @@ void vc4_debugfs_cleanup(struct drm_minor *minor);
/* vc4_drv.c */
void __iomem *vc4_ioremap_regs(struct platform_device *dev, int index);
/* vc4_gem.c */
void vc4_gem_init(struct drm_device *dev);
void vc4_gem_destroy(struct drm_device *dev);
int vc4_submit_cl_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv);
int vc4_wait_seqno_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv);
int vc4_wait_bo_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv);
void vc4_submit_next_job(struct drm_device *dev);
int vc4_wait_for_seqno(struct drm_device *dev, uint64_t seqno,
uint64_t timeout_ns, bool interruptible);
void vc4_job_handle_completed(struct vc4_dev *vc4);
/* vc4_hdmi.c */
extern struct platform_driver vc4_hdmi_driver;
int vc4_hdmi_debugfs_regs(struct seq_file *m, void *unused);
/* vc4_irq.c */
irqreturn_t vc4_irq(int irq, void *arg);
void vc4_irq_preinstall(struct drm_device *dev);
int vc4_irq_postinstall(struct drm_device *dev);
void vc4_irq_uninstall(struct drm_device *dev);
void vc4_irq_reset(struct drm_device *dev);
/* vc4_hvs.c */
extern struct platform_driver vc4_hvs_driver;
void vc4_hvs_dump_state(struct drm_device *dev);
@ -253,6 +414,27 @@ u32 vc4_plane_dlist_size(struct drm_plane_state *state);
extern struct platform_driver vc4_v3d_driver;
int vc4_v3d_debugfs_ident(struct seq_file *m, void *unused);
int vc4_v3d_debugfs_regs(struct seq_file *m, void *unused);
int vc4_v3d_set_power(struct vc4_dev *vc4, bool on);
/* vc4_validate.c */
int
vc4_validate_bin_cl(struct drm_device *dev,
void *validated,
void *unvalidated,
struct vc4_exec_info *exec);
int
vc4_validate_shader_recs(struct drm_device *dev, struct vc4_exec_info *exec);
struct drm_gem_cma_object *vc4_use_bo(struct vc4_exec_info *exec,
uint32_t hindex);
int vc4_get_rcl(struct drm_device *dev, struct vc4_exec_info *exec);
bool vc4_check_tex_size(struct vc4_exec_info *exec,
struct drm_gem_cma_object *fbo,
uint32_t offset, uint8_t tiling_format,
uint32_t width, uint32_t height, uint8_t cpp);
/* vc4_validate_shader.c */
struct vc4_validated_shader_info *

642
drivers/gpu/drm/vc4/vc4_gem.c 100644
View File

@ -0,0 +1,642 @@
/*
* Copyright © 2014 Broadcom
*
* 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 (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 NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/device.h>
#include <linux/io.h>
#include "uapi/drm/vc4_drm.h"
#include "vc4_drv.h"
#include "vc4_regs.h"
#include "vc4_trace.h"
static void
vc4_queue_hangcheck(struct drm_device *dev)
{
struct vc4_dev *vc4 = to_vc4_dev(dev);
mod_timer(&vc4->hangcheck.timer,
round_jiffies_up(jiffies + msecs_to_jiffies(100)));
}
static void
vc4_reset(struct drm_device *dev)
{
struct vc4_dev *vc4 = to_vc4_dev(dev);
DRM_INFO("Resetting GPU.\n");
vc4_v3d_set_power(vc4, false);
vc4_v3d_set_power(vc4, true);
vc4_irq_reset(dev);
/* Rearm the hangcheck -- another job might have been waiting
* for our hung one to get kicked off, and vc4_irq_reset()
* would have started it.
*/
vc4_queue_hangcheck(dev);
}
static void
vc4_reset_work(struct work_struct *work)
{
struct vc4_dev *vc4 =
container_of(work, struct vc4_dev, hangcheck.reset_work);
vc4_reset(vc4->dev);
}
static void
vc4_hangcheck_elapsed(unsigned long data)
{
struct drm_device *dev = (struct drm_device *)data;
struct vc4_dev *vc4 = to_vc4_dev(dev);
uint32_t ct0ca, ct1ca;
/* If idle, we can stop watching for hangs. */
if (list_empty(&vc4->job_list))
return;
ct0ca = V3D_READ(V3D_CTNCA(0));
ct1ca = V3D_READ(V3D_CTNCA(1));
/* If we've made any progress in execution, rearm the timer
* and wait.
*/
if (ct0ca != vc4->hangcheck.last_ct0ca ||
ct1ca != vc4->hangcheck.last_ct1ca) {
vc4->hangcheck.last_ct0ca = ct0ca;
vc4->hangcheck.last_ct1ca = ct1ca;
vc4_queue_hangcheck(dev);
return;
}
/* We've gone too long with no progress, reset. This has to
* be done from a work struct, since resetting can sleep and
* this timer hook isn't allowed to.
*/
schedule_work(&vc4->hangcheck.reset_work);
}
static void
submit_cl(struct drm_device *dev, uint32_t thread, uint32_t start, uint32_t end)
{
struct vc4_dev *vc4 = to_vc4_dev(dev);
/* Set the current and end address of the control list.
* Writing the end register is what starts the job.
*/
V3D_WRITE(V3D_CTNCA(thread), start);
V3D_WRITE(V3D_CTNEA(thread), end);
}
int
vc4_wait_for_seqno(struct drm_device *dev, uint64_t seqno, uint64_t timeout_ns,
bool interruptible)
{
struct vc4_dev *vc4 = to_vc4_dev(dev);
int ret = 0;
unsigned long timeout_expire;
DEFINE_WAIT(wait);
if (vc4->finished_seqno >= seqno)
return 0;
if (timeout_ns == 0)
return -ETIME;
timeout_expire = jiffies + nsecs_to_jiffies(timeout_ns);
trace_vc4_wait_for_seqno_begin(dev, seqno, timeout_ns);
for (;;) {
prepare_to_wait(&vc4->job_wait_queue, &wait,
interruptible ? TASK_INTERRUPTIBLE :
TASK_UNINTERRUPTIBLE);
if (interruptible && signal_pending(current)) {
ret = -ERESTARTSYS;
break;
}
if (vc4->finished_seqno >= seqno)
break;
if (timeout_ns != ~0ull) {
if (time_after_eq(jiffies, timeout_expire)) {
ret = -ETIME;
break;
}
schedule_timeout(timeout_expire - jiffies);
} else {
schedule();
}
}
finish_wait(&vc4->job_wait_queue, &wait);
trace_vc4_wait_for_seqno_end(dev, seqno);
if (ret && ret != -ERESTARTSYS) {
DRM_ERROR("timeout waiting for render thread idle\n");
return ret;
}
return 0;
}
static void
vc4_flush_caches(struct drm_device *dev)
{
struct vc4_dev *vc4 = to_vc4_dev(dev);
/* Flush the GPU L2 caches. These caches sit on top of system
* L3 (the 128kb or so shared with the CPU), and are
* non-allocating in the L3.
*/
V3D_WRITE(V3D_L2CACTL,
V3D_L2CACTL_L2CCLR);
V3D_WRITE(V3D_SLCACTL,
VC4_SET_FIELD(0xf, V3D_SLCACTL_T1CC) |
VC4_SET_FIELD(0xf, V3D_SLCACTL_T0CC) |
VC4_SET_FIELD(0xf, V3D_SLCACTL_UCC) |
VC4_SET_FIELD(0xf, V3D_SLCACTL_ICC));
}
/* Sets the registers for the next job to be actually be executed in
* the hardware.
*
* The job_lock should be held during this.
*/
void
vc4_submit_next_job(struct drm_device *dev)
{
struct vc4_dev *vc4 = to_vc4_dev(dev);
struct vc4_exec_info *exec = vc4_first_job(vc4);
if (!exec)
return;
vc4_flush_caches(dev);
/* Disable the binner's pre-loaded overflow memory address */
V3D_WRITE(V3D_BPOA, 0);
V3D_WRITE(V3D_BPOS, 0);
if (exec->ct0ca != exec->ct0ea)
submit_cl(dev, 0, exec->ct0ca, exec->ct0ea);
submit_cl(dev, 1, exec->ct1ca, exec->ct1ea);
}
static void
vc4_update_bo_seqnos(struct vc4_exec_info *exec, uint64_t seqno)
{
struct vc4_bo *bo;
unsigned i;
for (i = 0; i < exec->bo_count; i++) {
bo = to_vc4_bo(&exec->bo[i]->base);
bo->seqno = seqno;
}
list_for_each_entry(bo, &exec->unref_list, unref_head) {
bo->seqno = seqno;
}
}
/* Queues a struct vc4_exec_info for execution. If no job is
* currently executing, then submits it.
*
* Unlike most GPUs, our hardware only handles one command list at a
* time. To queue multiple jobs at once, we'd need to edit the
* previous command list to have a jump to the new one at the end, and
* then bump the end address. That's a change for a later date,
* though.
*/
static void
vc4_queue_submit(struct drm_device *dev, struct vc4_exec_info *exec)
{
struct vc4_dev *vc4 = to_vc4_dev(dev);
uint64_t seqno;
unsigned long irqflags;
spin_lock_irqsave(&vc4->job_lock, irqflags);
seqno = ++vc4->emit_seqno;
exec->seqno = seqno;
vc4_update_bo_seqnos(exec, seqno);
list_add_tail(&exec->head, &vc4->job_list);
/* If no job was executing, kick ours off. Otherwise, it'll
* get started when the previous job's frame done interrupt
* occurs.
*/
if (vc4_first_job(vc4) == exec) {
vc4_submit_next_job(dev);
vc4_queue_hangcheck(dev);
}
spin_unlock_irqrestore(&vc4->job_lock, irqflags);
}
/**
* Looks up a bunch of GEM handles for BOs and stores the array for
* use in the command validator that actually writes relocated
* addresses pointing to them.
*/
static int
vc4_cl_lookup_bos(struct drm_device *dev,
struct drm_file *file_priv,
struct vc4_exec_info *exec)
{
struct drm_vc4_submit_cl *args = exec->args;
uint32_t *handles;
int ret = 0;
int i;
exec->bo_count = args->bo_handle_count;
if (!exec->bo_count) {
/* See comment on bo_index for why we have to check
* this.
*/
DRM_ERROR("Rendering requires BOs to validate\n");
return -EINVAL;
}
exec->bo = kcalloc(exec->bo_count, sizeof(struct drm_gem_cma_object *),
GFP_KERNEL);
if (!exec->bo) {
DRM_ERROR("Failed to allocate validated BO pointers\n");
return -ENOMEM;
}
handles = drm_malloc_ab(exec->bo_count, sizeof(uint32_t));
if (!handles) {
DRM_ERROR("Failed to allocate incoming GEM handles\n");
goto fail;
}
ret = copy_from_user(handles,
(void __user *)(uintptr_t)args->bo_handles,
exec->bo_count * sizeof(uint32_t));
if (ret) {
DRM_ERROR("Failed to copy in GEM handles\n");
goto fail;
}
spin_lock(&file_priv->table_lock);
for (i = 0; i < exec->bo_count; i++) {
struct drm_gem_object *bo = idr_find(&file_priv->object_idr,
handles[i]);
if (!bo) {
DRM_ERROR("Failed to look up GEM BO %d: %d\n",
i, handles[i]);
ret = -EINVAL;
spin_unlock(&file_priv->table_lock);
goto fail;
}
drm_gem_object_reference(bo);
exec->bo[i] = (struct drm_gem_cma_object *)bo;
}
spin_unlock(&file_priv->table_lock);
fail:
kfree(handles);
return 0;
}
static int
vc4_get_bcl(struct drm_device *dev, struct vc4_exec_info *exec)
{
struct drm_vc4_submit_cl *args = exec->args;
void *temp = NULL;
void *bin;
int ret = 0;
uint32_t bin_offset = 0;
uint32_t shader_rec_offset = roundup(bin_offset + args->bin_cl_size,
16);
uint32_t uniforms_offset = shader_rec_offset + args->shader_rec_size;
uint32_t exec_size = uniforms_offset + args->uniforms_size;
uint32_t temp_size = exec_size + (sizeof(struct vc4_shader_state) *
args->shader_rec_count);
struct vc4_bo *bo;
if (uniforms_offset < shader_rec_offset ||
exec_size < uniforms_offset ||
args->shader_rec_count >= (UINT_MAX /
sizeof(struct vc4_shader_state)) ||
temp_size < exec_size) {
DRM_ERROR("overflow in exec arguments\n");
goto fail;
}
/* Allocate space where we'll store the copied in user command lists
* and shader records.
*
* We don't just copy directly into the BOs because we need to
* read the contents back for validation, and I think the
* bo->vaddr is uncached access.
*/
temp = kmalloc(temp_size, GFP_KERNEL);
if (!temp) {
DRM_ERROR("Failed to allocate storage for copying "
"in bin/render CLs.\n");
ret = -ENOMEM;
goto fail;
}
bin = temp + bin_offset;
exec->shader_rec_u = temp + shader_rec_offset;
exec->uniforms_u = temp + uniforms_offset;
exec->shader_state = temp + exec_size;
exec->shader_state_size = args->shader_rec_count;
ret = copy_from_user(bin,
(void __user *)(uintptr_t)args->bin_cl,
args->bin_cl_size);
if (ret) {
DRM_ERROR("Failed to copy in bin cl\n");
goto fail;
}
ret = copy_from_user(exec->shader_rec_u,
(void __user *)(uintptr_t)args->shader_rec,
args->shader_rec_size);
if (ret) {
DRM_ERROR("Failed to copy in shader recs\n");
goto fail;
}
ret = copy_from_user(exec->uniforms_u,
(void __user *)(uintptr_t)args->uniforms,
args->uniforms_size);
if (ret) {
DRM_ERROR("Failed to copy in uniforms cl\n");
goto fail;
}
bo = vc4_bo_create(dev, exec_size, true);
if (!bo) {
DRM_ERROR("Couldn't allocate BO for binning\n");
ret = PTR_ERR(exec->exec_bo);
goto fail;
}
exec->exec_bo = &bo->base;
list_add_tail(&to_vc4_bo(&exec->exec_bo->base)->unref_head,
&exec->unref_list);
exec->ct0ca = exec->exec_bo->paddr + bin_offset;
exec->bin_u = bin;
exec->shader_rec_v = exec->exec_bo->vaddr + shader_rec_offset;
exec->shader_rec_p = exec->exec_bo->paddr + shader_rec_offset;
exec->shader_rec_size = args->shader_rec_size;
exec->uniforms_v = exec->exec_bo->vaddr + uniforms_offset;
exec->uniforms_p = exec->exec_bo->paddr + uniforms_offset;
exec->uniforms_size = args->uniforms_size;
ret = vc4_validate_bin_cl(dev,
exec->exec_bo->vaddr + bin_offset,
bin,
exec);
if (ret)
goto fail;
ret = vc4_validate_shader_recs(dev, exec);
fail:
kfree(temp);
return ret;
}
static void
vc4_complete_exec(struct drm_device *dev, struct vc4_exec_info *exec)
{
unsigned i;
/* Need the struct lock for drm_gem_object_unreference(). */
mutex_lock(&dev->struct_mutex);
if (exec->bo) {
for (i = 0; i < exec->bo_count; i++)
drm_gem_object_unreference(&exec->bo[i]->base);
kfree(exec->bo);
}
while (!list_empty(&exec->unref_list)) {
struct vc4_bo *bo = list_first_entry(&exec->unref_list,
struct vc4_bo, unref_head);
list_del(&bo->unref_head);
drm_gem_object_unreference(&bo->base.base);
}
mutex_unlock(&dev->struct_mutex);
kfree(exec);
}
void
vc4_job_handle_completed(struct vc4_dev *vc4)
{
unsigned long irqflags;
spin_lock_irqsave(&vc4->job_lock, irqflags);
while (!list_empty(&vc4->job_done_list)) {
struct vc4_exec_info *exec =
list_first_entry(&vc4->job_done_list,
struct vc4_exec_info, head);
list_del(&exec->head);
spin_unlock_irqrestore(&vc4->job_lock, irqflags);
vc4_complete_exec(vc4->dev, exec);
spin_lock_irqsave(&vc4->job_lock, irqflags);
}
spin_unlock_irqrestore(&vc4->job_lock, irqflags);
}
/* Scheduled when any job has been completed, this walks the list of
* jobs that had completed and unrefs their BOs and frees their exec
* structs.
*/
static void
vc4_job_done_work(struct work_struct *work)
{
struct vc4_dev *vc4 =
container_of(work, struct vc4_dev, job_done_work);
vc4_job_handle_completed(vc4);
}
static int
vc4_wait_for_seqno_ioctl_helper(struct drm_device *dev,
uint64_t seqno,
uint64_t *timeout_ns)
{
unsigned long start = jiffies;
int ret = vc4_wait_for_seqno(dev, seqno, *timeout_ns, true);
if ((ret == -EINTR || ret == -ERESTARTSYS) && *timeout_ns != ~0ull) {
uint64_t delta = jiffies_to_nsecs(jiffies - start);
if (*timeout_ns >= delta)
*timeout_ns -= delta;
}
return ret;
}
int
vc4_wait_seqno_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_vc4_wait_seqno *args = data;
return vc4_wait_for_seqno_ioctl_helper(dev, args->seqno,
&args->timeout_ns);
}
int
vc4_wait_bo_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
int ret;
struct drm_vc4_wait_bo *args = data;
struct drm_gem_object *gem_obj;
struct vc4_bo *bo;
gem_obj = drm_gem_object_lookup(dev, file_priv, args->handle);
if (!gem_obj) {
DRM_ERROR("Failed to look up GEM BO %d\n", args->handle);
return -EINVAL;
}
bo = to_vc4_bo(gem_obj);
ret = vc4_wait_for_seqno_ioctl_helper(dev, bo->seqno,
&args->timeout_ns);
drm_gem_object_unreference_unlocked(gem_obj);
return ret;
}
/**
* Submits a command list to the VC4.
*
* This is what is called batchbuffer emitting on other hardware.
*/
int
vc4_submit_cl_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct vc4_dev *vc4 = to_vc4_dev(dev);
struct drm_vc4_submit_cl *args = data;
struct vc4_exec_info *exec;
int ret;
if ((args->flags & ~VC4_SUBMIT_CL_USE_CLEAR_COLOR) != 0) {
DRM_ERROR("Unknown flags: 0x%02x\n", args->flags);
return -EINVAL;
}
exec = kcalloc(1, sizeof(*exec), GFP_KERNEL);
if (!exec) {
DRM_ERROR("malloc failure on exec struct\n");
return -ENOMEM;
}
exec->args = args;
INIT_LIST_HEAD(&exec->unref_list);
ret = vc4_cl_lookup_bos(dev, file_priv, exec);
if (ret)
goto fail;
if (exec->args->bin_cl_size != 0) {
ret = vc4_get_bcl(dev, exec);
if (ret)
goto fail;
} else {
exec->ct0ca = 0;
exec->ct0ea = 0;
}
ret = vc4_get_rcl(dev, exec);
if (ret)
goto fail;
/* Clear this out of the struct we'll be putting in the queue,
* since it's part of our stack.
*/
exec->args = NULL;
vc4_queue_submit(dev, exec);
/* Return the seqno for our job. */
args->seqno = vc4->emit_seqno;
return 0;
fail:
vc4_complete_exec(vc4->dev, exec);
return ret;
}
void
vc4_gem_init(struct drm_device *dev)
{
struct vc4_dev *vc4 = to_vc4_dev(dev);
INIT_LIST_HEAD(&vc4->job_list);
INIT_LIST_HEAD(&vc4->job_done_list);
spin_lock_init(&vc4->job_lock);
INIT_WORK(&vc4->hangcheck.reset_work, vc4_reset_work);
setup_timer(&vc4->hangcheck.timer,
vc4_hangcheck_elapsed,
(unsigned long)dev);
INIT_WORK(&vc4->job_done_work, vc4_job_done_work);
}
void
vc4_gem_destroy(struct drm_device *dev)
{
struct vc4_dev *vc4 = to_vc4_dev(dev);
/* Waiting for exec to finish would need to be done before
* unregistering V3D.
*/
WARN_ON(vc4->emit_seqno != vc4->finished_seqno);
/* V3D should already have disabled its interrupt and cleared
* the overflow allocation registers. Now free the object.
*/
if (vc4->overflow_mem) {
drm_gem_object_unreference_unlocked(&vc4->overflow_mem->base.base);
vc4->overflow_mem = NULL;
}
vc4_bo_cache_destroy(dev);
}

210
drivers/gpu/drm/vc4/vc4_irq.c 100644
View File

@ -0,0 +1,210 @@
/*
* Copyright © 2014 Broadcom
*
* 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 (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 NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
/** DOC: Interrupt management for the V3D engine.
*
* We have an interrupt status register (V3D_INTCTL) which reports
* interrupts, and where writing 1 bits clears those interrupts.
* There are also a pair of interrupt registers
* (V3D_INTENA/V3D_INTDIS) where writing a 1 to their bits enables or
* disables that specific interrupt, and 0s written are ignored
* (reading either one returns the set of enabled interrupts).
*
* When we take a render frame interrupt, we need to wake the
* processes waiting for some frame to be done, and get the next frame
* submitted ASAP (so the hardware doesn't sit idle when there's work
* to do).
*
* When we take the binner out of memory interrupt, we need to
* allocate some new memory and pass it to the binner so that the
* current job can make progress.
*/
#include "vc4_drv.h"
#include "vc4_regs.h"
#define V3D_DRIVER_IRQS (V3D_INT_OUTOMEM | \
V3D_INT_FRDONE)
DECLARE_WAIT_QUEUE_HEAD(render_wait);
static void
vc4_overflow_mem_work(struct work_struct *work)
{
struct vc4_dev *vc4 =
container_of(work, struct vc4_dev, overflow_mem_work);
struct drm_device *dev = vc4->dev;
struct vc4_bo *bo;
bo = vc4_bo_create(dev, 256 * 1024, true);
if (!bo) {
DRM_ERROR("Couldn't allocate binner overflow mem\n");
return;
}
/* If there's a job executing currently, then our previous
* overflow allocation is getting used in that job and we need
* to queue it to be released when the job is done. But if no
* job is executing at all, then we can free the old overflow
* object direcctly.
*
* No lock necessary for this pointer since we're the only
* ones that update the pointer, and our workqueue won't
* reenter.
*/
if (vc4->overflow_mem) {
struct vc4_exec_info *current_exec;
unsigned long irqflags;
spin_lock_irqsave(&vc4->job_lock, irqflags);
current_exec = vc4_first_job(vc4);
if (current_exec) {
vc4->overflow_mem->seqno = vc4->finished_seqno + 1;
list_add_tail(&vc4->overflow_mem->unref_head,
&current_exec->unref_list);
vc4->overflow_mem = NULL;
}
spin_unlock_irqrestore(&vc4->job_lock, irqflags);
}
if (vc4->overflow_mem)
drm_gem_object_unreference_unlocked(&vc4->overflow_mem->base.base);
vc4->overflow_mem = bo;
V3D_WRITE(V3D_BPOA, bo->base.paddr);
V3D_WRITE(V3D_BPOS, bo->base.base.size);
V3D_WRITE(V3D_INTCTL, V3D_INT_OUTOMEM);
V3D_WRITE(V3D_INTENA, V3D_INT_OUTOMEM);
}
static void
vc4_irq_finish_job(struct drm_device *dev)
{
struct vc4_dev *vc4 = to_vc4_dev(dev);
struct vc4_exec_info *exec = vc4_first_job(vc4);
if (!exec)
return;
vc4->finished_seqno++;
list_move_tail(&exec->head, &vc4->job_done_list);
vc4_submit_next_job(dev);
wake_up_all(&vc4->job_wait_queue);
schedule_work(&vc4->job_done_work);
}
irqreturn_t
vc4_irq(int irq, void *arg)
{
struct drm_device *dev = arg;
struct vc4_dev *vc4 = to_vc4_dev(dev);
uint32_t intctl;
irqreturn_t status = IRQ_NONE;
barrier();
intctl = V3D_READ(V3D_INTCTL);
/* Acknowledge the interrupts we're handling here. The render
* frame done interrupt will be cleared, while OUTOMEM will
* stay high until the underlying cause is cleared.
*/
V3D_WRITE(V3D_INTCTL, intctl);
if (intctl & V3D_INT_OUTOMEM) {
/* Disable OUTOMEM until the work is done. */
V3D_WRITE(V3D_INTDIS, V3D_INT_OUTOMEM);
schedule_work(&vc4->overflow_mem_work);
status = IRQ_HANDLED;
}
if (intctl & V3D_INT_FRDONE) {
spin_lock(&vc4->job_lock);
vc4_irq_finish_job(dev);
spin_unlock(&vc4->job_lock);
status = IRQ_HANDLED;
}
return status;
}
void
vc4_irq_preinstall(struct drm_device *dev)
{
struct vc4_dev *vc4 = to_vc4_dev(dev);
init_waitqueue_head(&vc4->job_wait_queue);
INIT_WORK(&vc4->overflow_mem_work, vc4_overflow_mem_work);
/* Clear any pending interrupts someone might have left around
* for us.
*/
V3D_WRITE(V3D_INTCTL, V3D_DRIVER_IRQS);
}
int
vc4_irq_postinstall(struct drm_device *dev)
{
struct vc4_dev *vc4 = to_vc4_dev(dev);
/* Enable both the render done and out of memory interrupts. */
V3D_WRITE(V3D_INTENA, V3D_DRIVER_IRQS);
return 0;
}
void
vc4_irq_uninstall(struct drm_device *dev)
{
struct vc4_dev *vc4 = to_vc4_dev(dev);
/* Disable sending interrupts for our driver's IRQs. */
V3D_WRITE(V3D_INTDIS, V3D_DRIVER_IRQS);
/* Clear any pending interrupts we might have left. */
V3D_WRITE(V3D_INTCTL, V3D_DRIVER_IRQS);
cancel_work_sync(&vc4->overflow_mem_work);
}
/** Reinitializes interrupt registers when a GPU reset is performed. */
void vc4_irq_reset(struct drm_device *dev)
{
struct vc4_dev *vc4 = to_vc4_dev(dev);
unsigned long irqflags;
/* Acknowledge any stale IRQs. */
V3D_WRITE(V3D_INTCTL, V3D_DRIVER_IRQS);
/*
* Turn all our interrupts on. Binner out of memory is the
* only one we expect to trigger at this point, since we've
* just come from poweron and haven't supplied any overflow
* memory yet.
*/
V3D_WRITE(V3D_INTENA, V3D_DRIVER_IRQS);
spin_lock_irqsave(&vc4->job_lock, irqflags);
vc4_irq_finish_job(dev);
spin_unlock_irqrestore(&vc4->job_lock, irqflags);
}

399
drivers/gpu/drm/vc4/vc4_packet.h 100644
View File

@ -0,0 +1,399 @@
/*
* Copyright © 2014 Broadcom
*
* 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 (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 NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#ifndef VC4_PACKET_H
#define VC4_PACKET_H
#include "vc4_regs.h" /* for VC4_MASK, VC4_GET_FIELD, VC4_SET_FIELD */
enum vc4_packet {
VC4_PACKET_HALT = 0,
VC4_PACKET_NOP = 1,
VC4_PACKET_FLUSH = 4,
VC4_PACKET_FLUSH_ALL = 5,
VC4_PACKET_START_TILE_BINNING = 6,
VC4_PACKET_INCREMENT_SEMAPHORE = 7,
VC4_PACKET_WAIT_ON_SEMAPHORE = 8,
VC4_PACKET_BRANCH = 16,
VC4_PACKET_BRANCH_TO_SUB_LIST = 17,
VC4_PACKET_STORE_MS_TILE_BUFFER = 24,
VC4_PACKET_STORE_MS_TILE_BUFFER_AND_EOF = 25,
VC4_PACKET_STORE_FULL_RES_TILE_BUFFER = 26,
VC4_PACKET_LOAD_FULL_RES_TILE_BUFFER = 27,
VC4_PACKET_STORE_TILE_BUFFER_GENERAL = 28,
VC4_PACKET_LOAD_TILE_BUFFER_GENERAL = 29,
VC4_PACKET_GL_INDEXED_PRIMITIVE = 32,
VC4_PACKET_GL_ARRAY_PRIMITIVE = 33,
VC4_PACKET_COMPRESSED_PRIMITIVE = 48,
VC4_PACKET_CLIPPED_COMPRESSED_PRIMITIVE = 49,
VC4_PACKET_PRIMITIVE_LIST_FORMAT = 56,
VC4_PACKET_GL_SHADER_STATE = 64,
VC4_PACKET_NV_SHADER_STATE = 65,
VC4_PACKET_VG_SHADER_STATE = 66,
VC4_PACKET_CONFIGURATION_BITS = 96,
VC4_PACKET_FLAT_SHADE_FLAGS = 97,
VC4_PACKET_POINT_SIZE = 98,
VC4_PACKET_LINE_WIDTH = 99,
VC4_PACKET_RHT_X_BOUNDARY = 100,
VC4_PACKET_DEPTH_OFFSET = 101,
VC4_PACKET_CLIP_WINDOW = 102,
VC4_PACKET_VIEWPORT_OFFSET = 103,
VC4_PACKET_Z_CLIPPING = 104,
VC4_PACKET_CLIPPER_XY_SCALING = 105,
VC4_PACKET_CLIPPER_Z_SCALING = 106,
VC4_PACKET_TILE_BINNING_MODE_CONFIG = 112,
VC4_PACKET_TILE_RENDERING_MODE_CONFIG = 113,
VC4_PACKET_CLEAR_COLORS = 114,
VC4_PACKET_TILE_COORDINATES = 115,
/* Not an actual hardware packet -- this is what we use to put
* references to GEM bos in the command stream, since we need the u32
* int the actual address packet in order to store the offset from the
* start of the BO.
*/
VC4_PACKET_GEM_HANDLES = 254,
} __attribute__ ((__packed__));
#define VC4_PACKET_HALT_SIZE 1
#define VC4_PACKET_NOP_SIZE 1
#define VC4_PACKET_FLUSH_SIZE 1
#define VC4_PACKET_FLUSH_ALL_SIZE 1
#define VC4_PACKET_START_TILE_BINNING_SIZE 1
#define VC4_PACKET_INCREMENT_SEMAPHORE_SIZE 1
#define VC4_PACKET_WAIT_ON_SEMAPHORE_SIZE 1
#define VC4_PACKET_BRANCH_SIZE 5
#define VC4_PACKET_BRANCH_TO_SUB_LIST_SIZE 5
#define VC4_PACKET_STORE_MS_TILE_BUFFER_SIZE 1
#define VC4_PACKET_STORE_MS_TILE_BUFFER_AND_EOF_SIZE 1
#define VC4_PACKET_STORE_FULL_RES_TILE_BUFFER_SIZE 5
#define VC4_PACKET_LOAD_FULL_RES_TILE_BUFFER_SIZE 5
#define VC4_PACKET_STORE_TILE_BUFFER_GENERAL_SIZE 7
#define VC4_PACKET_LOAD_TILE_BUFFER_GENERAL_SIZE 7
#define VC4_PACKET_GL_INDEXED_PRIMITIVE_SIZE 14
#define VC4_PACKET_GL_ARRAY_PRIMITIVE_SIZE 10
#define VC4_PACKET_COMPRESSED_PRIMITIVE_SIZE 1
#define VC4_PACKET_CLIPPED_COMPRESSED_PRIMITIVE_SIZE 1
#define VC4_PACKET_PRIMITIVE_LIST_FORMAT_SIZE 2
#define VC4_PACKET_GL_SHADER_STATE_SIZE 5
#define VC4_PACKET_NV_SHADER_STATE_SIZE 5
#define VC4_PACKET_VG_SHADER_STATE_SIZE 5
#define VC4_PACKET_CONFIGURATION_BITS_SIZE 4
#define VC4_PACKET_FLAT_SHADE_FLAGS_SIZE 5
#define VC4_PACKET_POINT_SIZE_SIZE 5
#define VC4_PACKET_LINE_WIDTH_SIZE 5
#define VC4_PACKET_RHT_X_BOUNDARY_SIZE 3
#define VC4_PACKET_DEPTH_OFFSET_SIZE 5
#define VC4_PACKET_CLIP_WINDOW_SIZE 9
#define VC4_PACKET_VIEWPORT_OFFSET_SIZE 5
#define VC4_PACKET_Z_CLIPPING_SIZE 9
#define VC4_PACKET_CLIPPER_XY_SCALING_SIZE 9
#define VC4_PACKET_CLIPPER_Z_SCALING_SIZE 9
#define VC4_PACKET_TILE_BINNING_MODE_CONFIG_SIZE 16
#define VC4_PACKET_TILE_RENDERING_MODE_CONFIG_SIZE 11
#define VC4_PACKET_CLEAR_COLORS_SIZE 14
#define VC4_PACKET_TILE_COORDINATES_SIZE 3
#define VC4_PACKET_GEM_HANDLES_SIZE 9
/* Number of multisamples supported. */
#define VC4_MAX_SAMPLES 4
/* Size of a full resolution color or Z tile buffer load/store. */
#define VC4_TILE_BUFFER_SIZE (64 * 64 * 4)
/** @{
* Bits used by packets like VC4_PACKET_STORE_TILE_BUFFER_GENERAL and
* VC4_PACKET_TILE_RENDERING_MODE_CONFIG.
*/
#define VC4_TILING_FORMAT_LINEAR 0
#define VC4_TILING_FORMAT_T 1
#define VC4_TILING_FORMAT_LT 2
/** @} */
/** @{
*
* low bits of VC4_PACKET_STORE_FULL_RES_TILE_BUFFER and
* VC4_PACKET_LOAD_FULL_RES_TILE_BUFFER.
*/
#define VC4_LOADSTORE_FULL_RES_EOF BIT(3)
#define VC4_LOADSTORE_FULL_RES_DISABLE_CLEAR_ALL BIT(2)
#define VC4_LOADSTORE_FULL_RES_DISABLE_ZS BIT(1)
#define VC4_LOADSTORE_FULL_RES_DISABLE_COLOR BIT(0)
/** @{
*
* low bits of VC4_PACKET_STORE_FULL_RES_TILE_BUFFER and
* VC4_PACKET_LOAD_FULL_RES_TILE_BUFFER.
*/
#define VC4_LOADSTORE_FULL_RES_EOF BIT(3)
#define VC4_LOADSTORE_FULL_RES_DISABLE_CLEAR_ALL BIT(2)
#define VC4_LOADSTORE_FULL_RES_DISABLE_ZS BIT(1)
#define VC4_LOADSTORE_FULL_RES_DISABLE_COLOR BIT(0)
/** @{
*
* byte 2 of VC4_PACKET_STORE_TILE_BUFFER_GENERAL and
* VC4_PACKET_LOAD_TILE_BUFFER_GENERAL (low bits of the address)
*/
#define VC4_LOADSTORE_TILE_BUFFER_EOF BIT(3)
#define VC4_LOADSTORE_TILE_BUFFER_DISABLE_FULL_VG_MASK BIT(2)
#define VC4_LOADSTORE_TILE_BUFFER_DISABLE_FULL_ZS BIT(1)
#define VC4_LOADSTORE_TILE_BUFFER_DISABLE_FULL_COLOR BIT(0)
/** @} */
/** @{
*
* byte 0-1 of VC4_PACKET_STORE_TILE_BUFFER_GENERAL and
* VC4_PACKET_LOAD_TILE_BUFFER_GENERAL
*/
#define VC4_STORE_TILE_BUFFER_DISABLE_VG_MASK_CLEAR BIT(15)
#define VC4_STORE_TILE_BUFFER_DISABLE_ZS_CLEAR BIT(14)
#define VC4_STORE_TILE_BUFFER_DISABLE_COLOR_CLEAR BIT(13)
#define VC4_STORE_TILE_BUFFER_DISABLE_SWAP BIT(12)
#define VC4_LOADSTORE_TILE_BUFFER_FORMAT_MASK VC4_MASK(9, 8)
#define VC4_LOADSTORE_TILE_BUFFER_FORMAT_SHIFT 8
#define VC4_LOADSTORE_TILE_BUFFER_RGBA8888 0
#define VC4_LOADSTORE_TILE_BUFFER_BGR565_DITHER 1
#define VC4_LOADSTORE_TILE_BUFFER_BGR565 2
/** @} */
/** @{
*
* byte 0 of VC4_PACKET_STORE_TILE_BUFFER_GENERAL and
* VC4_PACKET_LOAD_TILE_BUFFER_GENERAL
*/
#define VC4_STORE_TILE_BUFFER_MODE_MASK VC4_MASK(7, 6)
#define VC4_STORE_TILE_BUFFER_MODE_SHIFT 6
#define VC4_STORE_TILE_BUFFER_MODE_SAMPLE0 (0 << 6)
#define VC4_STORE_TILE_BUFFER_MODE_DECIMATE_X4 (1 << 6)
#define VC4_STORE_TILE_BUFFER_MODE_DECIMATE_X16 (2 << 6)
/** The values of the field are VC4_TILING_FORMAT_* */
#define VC4_LOADSTORE_TILE_BUFFER_TILING_MASK VC4_MASK(5, 4)
#define VC4_LOADSTORE_TILE_BUFFER_TILING_SHIFT 4
#define VC4_LOADSTORE_TILE_BUFFER_BUFFER_MASK VC4_MASK(2, 0)
#define VC4_LOADSTORE_TILE_BUFFER_BUFFER_SHIFT 0
#define VC4_LOADSTORE_TILE_BUFFER_NONE 0
#define VC4_LOADSTORE_TILE_BUFFER_COLOR 1
#define VC4_LOADSTORE_TILE_BUFFER_ZS 2
#define VC4_LOADSTORE_TILE_BUFFER_Z 3
#define VC4_LOADSTORE_TILE_BUFFER_VG_MASK 4
#define VC4_LOADSTORE_TILE_BUFFER_FULL 5
/** @} */
#define VC4_INDEX_BUFFER_U8 (0 << 4)
#define VC4_INDEX_BUFFER_U16 (1 << 4)
/* This flag is only present in NV shader state. */
#define VC4_SHADER_FLAG_SHADED_CLIP_COORDS BIT(3)
#define VC4_SHADER_FLAG_ENABLE_CLIPPING BIT(2)
#define VC4_SHADER_FLAG_VS_POINT_SIZE BIT(1)
#define VC4_SHADER_FLAG_FS_SINGLE_THREAD BIT(0)
/** @{ byte 2 of config bits. */
#define VC4_CONFIG_BITS_EARLY_Z_UPDATE BIT(1)
#define VC4_CONFIG_BITS_EARLY_Z BIT(0)
/** @} */
/** @{ byte 1 of config bits. */
#define VC4_CONFIG_BITS_Z_UPDATE BIT(7)
/** same values in this 3-bit field as PIPE_FUNC_* */
#define VC4_CONFIG_BITS_DEPTH_FUNC_SHIFT 4
#define VC4_CONFIG_BITS_COVERAGE_READ_LEAVE BIT(3)
#define VC4_CONFIG_BITS_COVERAGE_UPDATE_NONZERO (0 << 1)
#define VC4_CONFIG_BITS_COVERAGE_UPDATE_ODD (1 << 1)
#define VC4_CONFIG_BITS_COVERAGE_UPDATE_OR (2 << 1)
#define VC4_CONFIG_BITS_COVERAGE_UPDATE_ZERO (3 << 1)
#define VC4_CONFIG_BITS_COVERAGE_PIPE_SELECT BIT(0)
/** @} */
/** @{ byte 0 of config bits. */
#define VC4_CONFIG_BITS_RASTERIZER_OVERSAMPLE_NONE (0 << 6)
#define VC4_CONFIG_BITS_RASTERIZER_OVERSAMPLE_4X (1 << 6)
#define VC4_CONFIG_BITS_RASTERIZER_OVERSAMPLE_16X (2 << 6)
#define VC4_CONFIG_BITS_AA_POINTS_AND_LINES BIT(4)
#define VC4_CONFIG_BITS_ENABLE_DEPTH_OFFSET BIT(3)
#define VC4_CONFIG_BITS_CW_PRIMITIVES BIT(2)
#define VC4_CONFIG_BITS_ENABLE_PRIM_BACK BIT(1)
#define VC4_CONFIG_BITS_ENABLE_PRIM_FRONT BIT(0)
/** @} */
/** @{ bits in the last u8 of VC4_PACKET_TILE_BINNING_MODE_CONFIG */
#define VC4_BIN_CONFIG_DB_NON_MS BIT(7)
#define VC4_BIN_CONFIG_ALLOC_BLOCK_SIZE_MASK VC4_MASK(6, 5)
#define VC4_BIN_CONFIG_ALLOC_BLOCK_SIZE_SHIFT 5
#define VC4_BIN_CONFIG_ALLOC_BLOCK_SIZE_32 0
#define VC4_BIN_CONFIG_ALLOC_BLOCK_SIZE_64 1
#define VC4_BIN_CONFIG_ALLOC_BLOCK_SIZE_128 2
#define VC4_BIN_CONFIG_ALLOC_BLOCK_SIZE_256 3
#define VC4_BIN_CONFIG_ALLOC_INIT_BLOCK_SIZE_MASK VC4_MASK(4, 3)
#define VC4_BIN_CONFIG_ALLOC_INIT_BLOCK_SIZE_SHIFT 3
#define VC4_BIN_CONFIG_ALLOC_INIT_BLOCK_SIZE_32 0
#define VC4_BIN_CONFIG_ALLOC_INIT_BLOCK_SIZE_64 1
#define VC4_BIN_CONFIG_ALLOC_INIT_BLOCK_SIZE_128 2
#define VC4_BIN_CONFIG_ALLOC_INIT_BLOCK_SIZE_256 3
#define VC4_BIN_CONFIG_AUTO_INIT_TSDA BIT(2)
#define VC4_BIN_CONFIG_TILE_BUFFER_64BIT BIT(1)
#define VC4_BIN_CONFIG_MS_MODE_4X BIT(0)
/** @} */
/** @{ bits in the last u16 of VC4_PACKET_TILE_RENDERING_MODE_CONFIG */
#define VC4_RENDER_CONFIG_DB_NON_MS BIT(12)
#define VC4_RENDER_CONFIG_EARLY_Z_COVERAGE_DISABLE BIT(11)
#define VC4_RENDER_CONFIG_EARLY_Z_DIRECTION_G BIT(10)
#define VC4_RENDER_CONFIG_COVERAGE_MODE BIT(9)
#define VC4_RENDER_CONFIG_ENABLE_VG_MASK BIT(8)
/** The values of the field are VC4_TILING_FORMAT_* */
#define VC4_RENDER_CONFIG_MEMORY_FORMAT_MASK VC4_MASK(7, 6)
#define VC4_RENDER_CONFIG_MEMORY_FORMAT_SHIFT 6
#define VC4_RENDER_CONFIG_DECIMATE_MODE_1X (0 << 4)
#define VC4_RENDER_CONFIG_DECIMATE_MODE_4X (1 << 4)
#define VC4_RENDER_CONFIG_DECIMATE_MODE_16X (2 << 4)
#define VC4_RENDER_CONFIG_FORMAT_MASK VC4_MASK(3, 2)
#define VC4_RENDER_CONFIG_FORMAT_SHIFT 2
#define VC4_RENDER_CONFIG_FORMAT_BGR565_DITHERED 0
#define VC4_RENDER_CONFIG_FORMAT_RGBA8888 1
#define VC4_RENDER_CONFIG_FORMAT_BGR565 2
#define VC4_RENDER_CONFIG_TILE_BUFFER_64BIT BIT(1)
#define VC4_RENDER_CONFIG_MS_MODE_4X BIT(0)
#define VC4_PRIMITIVE_LIST_FORMAT_16_INDEX (1 << 4)
#define VC4_PRIMITIVE_LIST_FORMAT_32_XY (3 << 4)
#define VC4_PRIMITIVE_LIST_FORMAT_TYPE_POINTS (0 << 0)
#define VC4_PRIMITIVE_LIST_FORMAT_TYPE_LINES (1 << 0)
#define VC4_PRIMITIVE_LIST_FORMAT_TYPE_TRIANGLES (2 << 0)
#define VC4_PRIMITIVE_LIST_FORMAT_TYPE_RHT (3 << 0)
enum vc4_texture_data_type {
VC4_TEXTURE_TYPE_RGBA8888 = 0,
VC4_TEXTURE_TYPE_RGBX8888 = 1,
VC4_TEXTURE_TYPE_RGBA4444 = 2,
VC4_TEXTURE_TYPE_RGBA5551 = 3,
VC4_TEXTURE_TYPE_RGB565 = 4,
VC4_TEXTURE_TYPE_LUMINANCE = 5,
VC4_TEXTURE_TYPE_ALPHA = 6,
VC4_TEXTURE_TYPE_LUMALPHA = 7,
VC4_TEXTURE_TYPE_ETC1 = 8,
VC4_TEXTURE_TYPE_S16F = 9,
VC4_TEXTURE_TYPE_S8 = 10,
VC4_TEXTURE_TYPE_S16 = 11,
VC4_TEXTURE_TYPE_BW1 = 12,
VC4_TEXTURE_TYPE_A4 = 13,
VC4_TEXTURE_TYPE_A1 = 14,
VC4_TEXTURE_TYPE_RGBA64 = 15,
VC4_TEXTURE_TYPE_RGBA32R = 16,
VC4_TEXTURE_TYPE_YUV422R = 17,
};
#define VC4_TEX_P0_OFFSET_MASK VC4_MASK(31, 12)
#define VC4_TEX_P0_OFFSET_SHIFT 12
#define VC4_TEX_P0_CSWIZ_MASK VC4_MASK(11, 10)
#define VC4_TEX_P0_CSWIZ_SHIFT 10
#define VC4_TEX_P0_CMMODE_MASK VC4_MASK(9, 9)
#define VC4_TEX_P0_CMMODE_SHIFT 9
#define VC4_TEX_P0_FLIPY_MASK VC4_MASK(8, 8)
#define VC4_TEX_P0_FLIPY_SHIFT 8
#define VC4_TEX_P0_TYPE_MASK VC4_MASK(7, 4)
#define VC4_TEX_P0_TYPE_SHIFT 4
#define VC4_TEX_P0_MIPLVLS_MASK VC4_MASK(3, 0)
#define VC4_TEX_P0_MIPLVLS_SHIFT 0
#define VC4_TEX_P1_TYPE4_MASK VC4_MASK(31, 31)
#define VC4_TEX_P1_TYPE4_SHIFT 31
#define VC4_TEX_P1_HEIGHT_MASK VC4_MASK(30, 20)
#define VC4_TEX_P1_HEIGHT_SHIFT 20
#define VC4_TEX_P1_ETCFLIP_MASK VC4_MASK(19, 19)
#define VC4_TEX_P1_ETCFLIP_SHIFT 19
#define VC4_TEX_P1_WIDTH_MASK VC4_MASK(18, 8)
#define VC4_TEX_P1_WIDTH_SHIFT 8
#define VC4_TEX_P1_MAGFILT_MASK VC4_MASK(7, 7)
#define VC4_TEX_P1_MAGFILT_SHIFT 7
# define VC4_TEX_P1_MAGFILT_LINEAR 0
# define VC4_TEX_P1_MAGFILT_NEAREST 1
#define VC4_TEX_P1_MINFILT_MASK VC4_MASK(6, 4)
#define VC4_TEX_P1_MINFILT_SHIFT 4
# define VC4_TEX_P1_MINFILT_LINEAR 0
# define VC4_TEX_P1_MINFILT_NEAREST 1
# define VC4_TEX_P1_MINFILT_NEAR_MIP_NEAR 2
# define VC4_TEX_P1_MINFILT_NEAR_MIP_LIN 3
# define VC4_TEX_P1_MINFILT_LIN_MIP_NEAR 4
# define VC4_TEX_P1_MINFILT_LIN_MIP_LIN 5
#define VC4_TEX_P1_WRAP_T_MASK VC4_MASK(3, 2)
#define VC4_TEX_P1_WRAP_T_SHIFT 2
#define VC4_TEX_P1_WRAP_S_MASK VC4_MASK(1, 0)
#define VC4_TEX_P1_WRAP_S_SHIFT 0
# define VC4_TEX_P1_WRAP_REPEAT 0
# define VC4_TEX_P1_WRAP_CLAMP 1
# define VC4_TEX_P1_WRAP_MIRROR 2
# define VC4_TEX_P1_WRAP_BORDER 3
#define VC4_TEX_P2_PTYPE_MASK VC4_MASK(31, 30)
#define VC4_TEX_P2_PTYPE_SHIFT 30
# define VC4_TEX_P2_PTYPE_IGNORED 0
# define VC4_TEX_P2_PTYPE_CUBE_MAP_STRIDE 1
# define VC4_TEX_P2_PTYPE_CHILD_IMAGE_DIMENSIONS 2
# define VC4_TEX_P2_PTYPE_CHILD_IMAGE_OFFSETS 3
/* VC4_TEX_P2_PTYPE_CUBE_MAP_STRIDE bits */
#define VC4_TEX_P2_CMST_MASK VC4_MASK(29, 12)
#define VC4_TEX_P2_CMST_SHIFT 12
#define VC4_TEX_P2_BSLOD_MASK VC4_MASK(0, 0)
#define VC4_TEX_P2_BSLOD_SHIFT 0
/* VC4_TEX_P2_PTYPE_CHILD_IMAGE_DIMENSIONS */
#define VC4_TEX_P2_CHEIGHT_MASK VC4_MASK(22, 12)
#define VC4_TEX_P2_CHEIGHT_SHIFT 12
#define VC4_TEX_P2_CWIDTH_MASK VC4_MASK(10, 0)
#define VC4_TEX_P2_CWIDTH_SHIFT 0
/* VC4_TEX_P2_PTYPE_CHILD_IMAGE_OFFSETS */
#define VC4_TEX_P2_CYOFF_MASK VC4_MASK(22, 12)
#define VC4_TEX_P2_CYOFF_SHIFT 12
#define VC4_TEX_P2_CXOFF_MASK VC4_MASK(10, 0)
#define VC4_TEX_P2_CXOFF_SHIFT 0
#endif /* VC4_PACKET_H */

634
drivers/gpu/drm/vc4/vc4_render_cl.c 100644
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@ -0,0 +1,634 @@
/*
* Copyright © 2014-2015 Broadcom
*
* 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 (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 NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
/**
* DOC: Render command list generation
*
* In the VC4 driver, render command list generation is performed by the
* kernel instead of userspace. We do this because validating a
* user-submitted command list is hard to get right and has high CPU overhead,
* while the number of valid configurations for render command lists is
* actually fairly low.
*/
#include "uapi/drm/vc4_drm.h"
#include "vc4_drv.h"
#include "vc4_packet.h"
struct vc4_rcl_setup {
struct drm_gem_cma_object *color_read;
struct drm_gem_cma_object *color_write;
struct drm_gem_cma_object *zs_read;
struct drm_gem_cma_object *zs_write;
struct drm_gem_cma_object *msaa_color_write;
struct drm_gem_cma_object *msaa_zs_write;
struct drm_gem_cma_object *rcl;
u32 next_offset;
};
static inline void rcl_u8(struct vc4_rcl_setup *setup, u8 val)
{
*(u8 *)(setup->rcl->vaddr + setup->next_offset) = val;
setup->next_offset += 1;
}
static inline void rcl_u16(struct vc4_rcl_setup *setup, u16 val)
{
*(u16 *)(setup->rcl->vaddr + setup->next_offset) = val;
setup->next_offset += 2;
}
static inline void rcl_u32(struct vc4_rcl_setup *setup, u32 val)
{
*(u32 *)(setup->rcl->vaddr + setup->next_offset) = val;
setup->next_offset += 4;
}
/*
* Emits a no-op STORE_TILE_BUFFER_GENERAL.
*
* If we emit a PACKET_TILE_COORDINATES, it must be followed by a store of
* some sort before another load is triggered.
*/
static void vc4_store_before_load(struct vc4_rcl_setup *setup)
{
rcl_u8(setup, VC4_PACKET_STORE_TILE_BUFFER_GENERAL);
rcl_u16(setup,
VC4_SET_FIELD(VC4_LOADSTORE_TILE_BUFFER_NONE,
VC4_LOADSTORE_TILE_BUFFER_BUFFER) |
VC4_STORE_TILE_BUFFER_DISABLE_COLOR_CLEAR |
VC4_STORE_TILE_BUFFER_DISABLE_ZS_CLEAR |
VC4_STORE_TILE_BUFFER_DISABLE_VG_MASK_CLEAR);
rcl_u32(setup, 0); /* no address, since we're in None mode */
}
/*
* Calculates the physical address of the start of a tile in a RCL surface.
*
* Unlike the other load/store packets,
* VC4_PACKET_LOAD/STORE_FULL_RES_TILE_BUFFER don't look at the tile
* coordinates packet, and instead just store to the address given.
*/
static uint32_t vc4_full_res_offset(struct vc4_exec_info *exec,
struct drm_gem_cma_object *bo,
struct drm_vc4_submit_rcl_surface *surf,
uint8_t x, uint8_t y)
{
return bo->paddr + surf->offset + VC4_TILE_BUFFER_SIZE *
(DIV_ROUND_UP(exec->args->width, 32) * y + x);
}
/*
* Emits a PACKET_TILE_COORDINATES if one isn't already pending.
*
* The tile coordinates packet triggers a pending load if there is one, are
* used for clipping during rendering, and determine where loads/stores happen
* relative to their base address.
*/
static void vc4_tile_coordinates(struct vc4_rcl_setup *setup,
uint32_t x, uint32_t y)
{
rcl_u8(setup, VC4_PACKET_TILE_COORDINATES);
rcl_u8(setup, x);
rcl_u8(setup, y);
}
static void emit_tile(struct vc4_exec_info *exec,
struct vc4_rcl_setup *setup,
uint8_t x, uint8_t y, bool first, bool last)
{
struct drm_vc4_submit_cl *args = exec->args;
bool has_bin = args->bin_cl_size != 0;
/* Note that the load doesn't actually occur until the
* tile coords packet is processed, and only one load
* may be outstanding at a time.
*/
if (setup->color_read) {
if (args->color_read.flags &
VC4_SUBMIT_RCL_SURFACE_READ_IS_FULL_RES) {
rcl_u8(setup, VC4_PACKET_LOAD_FULL_RES_TILE_BUFFER);
rcl_u32(setup,
vc4_full_res_offset(exec, setup->color_read,
&args->color_read, x, y) |
VC4_LOADSTORE_FULL_RES_DISABLE_ZS);
} else {
rcl_u8(setup, VC4_PACKET_LOAD_TILE_BUFFER_GENERAL);
rcl_u16(setup, args->color_read.bits);
rcl_u32(setup, setup->color_read->paddr +
args->color_read.offset);
}
}
if (setup->zs_read) {
if (args->zs_read.flags &
VC4_SUBMIT_RCL_SURFACE_READ_IS_FULL_RES) {
rcl_u8(setup, VC4_PACKET_LOAD_FULL_RES_TILE_BUFFER);
rcl_u32(setup,
vc4_full_res_offset(exec, setup->zs_read,
&args->zs_read, x, y) |
VC4_LOADSTORE_FULL_RES_DISABLE_COLOR);
} else {
if (setup->color_read) {
/* Exec previous load. */
vc4_tile_coordinates(setup, x, y);
vc4_store_before_load(setup);
}
rcl_u8(setup, VC4_PACKET_LOAD_TILE_BUFFER_GENERAL);
rcl_u16(setup, args->zs_read.bits);
rcl_u32(setup, setup->zs_read->paddr +
args->zs_read.offset);
}
}
/* Clipping depends on tile coordinates having been
* emitted, so we always need one here.
*/
vc4_tile_coordinates(setup, x, y);
/* Wait for the binner before jumping to the first
* tile's lists.
*/
if (first && has_bin)
rcl_u8(setup, VC4_PACKET_WAIT_ON_SEMAPHORE);
if (has_bin) {
rcl_u8(setup, VC4_PACKET_BRANCH_TO_SUB_LIST);
rcl_u32(setup, (exec->tile_bo->paddr +
exec->tile_alloc_offset +
(y * exec->bin_tiles_x + x) * 32));
}
if (setup->msaa_color_write) {
bool last_tile_write = (!setup->msaa_zs_write &&
!setup->zs_write &&
!setup->color_write);
uint32_t bits = VC4_LOADSTORE_FULL_RES_DISABLE_ZS;
if (!last_tile_write)
bits |= VC4_LOADSTORE_FULL_RES_DISABLE_CLEAR_ALL;
else if (last)
bits |= VC4_LOADSTORE_FULL_RES_EOF;
rcl_u8(setup, VC4_PACKET_STORE_FULL_RES_TILE_BUFFER);
rcl_u32(setup,
vc4_full_res_offset(exec, setup->msaa_color_write,
&args->msaa_color_write, x, y) |
bits);
}
if (setup->msaa_zs_write) {
bool last_tile_write = (!setup->zs_write &&
!setup->color_write);
uint32_t bits = VC4_LOADSTORE_FULL_RES_DISABLE_COLOR;
if (setup->msaa_color_write)
vc4_tile_coordinates(setup, x, y);
if (!last_tile_write)
bits |= VC4_LOADSTORE_FULL_RES_DISABLE_CLEAR_ALL;
else if (last)
bits |= VC4_LOADSTORE_FULL_RES_EOF;
rcl_u8(setup, VC4_PACKET_STORE_FULL_RES_TILE_BUFFER);
rcl_u32(setup,
vc4_full_res_offset(exec, setup->msaa_zs_write,
&args->msaa_zs_write, x, y) |
bits);
}
if (setup->zs_write) {
bool last_tile_write = !setup->color_write;
if (setup->msaa_color_write || setup->msaa_zs_write)
vc4_tile_coordinates(setup, x, y);
rcl_u8(setup, VC4_PACKET_STORE_TILE_BUFFER_GENERAL);
rcl_u16(setup, args->zs_write.bits |
(last_tile_write ?
0 : VC4_STORE_TILE_BUFFER_DISABLE_COLOR_CLEAR));
rcl_u32(setup,
(setup->zs_write->paddr + args->zs_write.offset) |
((last && last_tile_write) ?
VC4_LOADSTORE_TILE_BUFFER_EOF : 0));
}
if (setup->color_write) {
if (setup->msaa_color_write || setup->msaa_zs_write ||
setup->zs_write) {
vc4_tile_coordinates(setup, x, y);
}
if (last)
rcl_u8(setup, VC4_PACKET_STORE_MS_TILE_BUFFER_AND_EOF);
else
rcl_u8(setup, VC4_PACKET_STORE_MS_TILE_BUFFER);
}
}
static int vc4_create_rcl_bo(struct drm_device *dev, struct vc4_exec_info *exec,
struct vc4_rcl_setup *setup)
{
struct drm_vc4_submit_cl *args = exec->args;
bool has_bin = args->bin_cl_size != 0;
uint8_t min_x_tile = args->min_x_tile;
uint8_t min_y_tile = args->min_y_tile;
uint8_t max_x_tile = args->max_x_tile;
uint8_t max_y_tile = args->max_y_tile;
uint8_t xtiles = max_x_tile - min_x_tile + 1;
uint8_t ytiles = max_y_tile - min_y_tile + 1;
uint8_t x, y;
uint32_t size, loop_body_size;
size = VC4_PACKET_TILE_RENDERING_MODE_CONFIG_SIZE;
loop_body_size = VC4_PACKET_TILE_COORDINATES_SIZE;
if (args->flags & VC4_SUBMIT_CL_USE_CLEAR_COLOR) {
size += VC4_PACKET_CLEAR_COLORS_SIZE +
VC4_PACKET_TILE_COORDINATES_SIZE +
VC4_PACKET_STORE_TILE_BUFFER_GENERAL_SIZE;
}
if (setup->color_read) {
if (args->color_read.flags &
VC4_SUBMIT_RCL_SURFACE_READ_IS_FULL_RES) {
loop_body_size += VC4_PACKET_LOAD_FULL_RES_TILE_BUFFER_SIZE;
} else {
loop_body_size += VC4_PACKET_LOAD_TILE_BUFFER_GENERAL_SIZE;
}
}
if (setup->zs_read) {
if (args->zs_read.flags &
VC4_SUBMIT_RCL_SURFACE_READ_IS_FULL_RES) {
loop_body_size += VC4_PACKET_LOAD_FULL_RES_TILE_BUFFER_SIZE;
} else {
if (setup->color_read &&
!(args->color_read.flags &
VC4_SUBMIT_RCL_SURFACE_READ_IS_FULL_RES)) {
loop_body_size += VC4_PACKET_TILE_COORDINATES_SIZE;
loop_body_size += VC4_PACKET_STORE_TILE_BUFFER_GENERAL_SIZE;
}
loop_body_size += VC4_PACKET_LOAD_TILE_BUFFER_GENERAL_SIZE;
}
}
if (has_bin) {
size += VC4_PACKET_WAIT_ON_SEMAPHORE_SIZE;
loop_body_size += VC4_PACKET_BRANCH_TO_SUB_LIST_SIZE;
}
if (setup->msaa_color_write)
loop_body_size += VC4_PACKET_STORE_FULL_RES_TILE_BUFFER_SIZE;
if (setup->msaa_zs_write)
loop_body_size += VC4_PACKET_STORE_FULL_RES_TILE_BUFFER_SIZE;
if (setup->zs_write)
loop_body_size += VC4_PACKET_STORE_TILE_BUFFER_GENERAL_SIZE;
if (setup->color_write)
loop_body_size += VC4_PACKET_STORE_MS_TILE_BUFFER_SIZE;
/* We need a VC4_PACKET_TILE_COORDINATES in between each store. */
loop_body_size += VC4_PACKET_TILE_COORDINATES_SIZE *
((setup->msaa_color_write != NULL) +
(setup->msaa_zs_write != NULL) +
(setup->color_write != NULL) +
(setup->zs_write != NULL) - 1);
size += xtiles * ytiles * loop_body_size;
setup->rcl = &vc4_bo_create(dev, size, true)->base;
if (!setup->rcl)
return -ENOMEM;
list_add_tail(&to_vc4_bo(&setup->rcl->base)->unref_head,
&exec->unref_list);
rcl_u8(setup, VC4_PACKET_TILE_RENDERING_MODE_CONFIG);
rcl_u32(setup,
(setup->color_write ? (setup->color_write->paddr +
args->color_write.offset) :
0));
rcl_u16(setup, args->width);
rcl_u16(setup, args->height);
rcl_u16(setup, args->color_write.bits);
/* The tile buffer gets cleared when the previous tile is stored. If
* the clear values changed between frames, then the tile buffer has
* stale clear values in it, so we have to do a store in None mode (no
* writes) so that we trigger the tile buffer clear.
*/
if (args->flags & VC4_SUBMIT_CL_USE_CLEAR_COLOR) {
rcl_u8(setup, VC4_PACKET_CLEAR_COLORS);
rcl_u32(setup, args->clear_color[0]);
rcl_u32(setup, args->clear_color[1]);
rcl_u32(setup, args->clear_z);
rcl_u8(setup, args->clear_s);
vc4_tile_coordinates(setup, 0, 0);
rcl_u8(setup, VC4_PACKET_STORE_TILE_BUFFER_GENERAL);
rcl_u16(setup, VC4_LOADSTORE_TILE_BUFFER_NONE);
rcl_u32(setup, 0); /* no address, since we're in None mode */
}
for (y = min_y_tile; y <= max_y_tile; y++) {
for (x = min_x_tile; x <= max_x_tile; x++) {
bool first = (x == min_x_tile && y == min_y_tile);
bool last = (x == max_x_tile && y == max_y_tile);
emit_tile(exec, setup, x, y, first, last);
}
}
BUG_ON(setup->next_offset != size);
exec->ct1ca = setup->rcl->paddr;
exec->ct1ea = setup->rcl->paddr + setup->next_offset;
return 0;
}
static int vc4_full_res_bounds_check(struct vc4_exec_info *exec,
struct drm_gem_cma_object *obj,
struct drm_vc4_submit_rcl_surface *surf)
{
struct drm_vc4_submit_cl *args = exec->args;
u32 render_tiles_stride = DIV_ROUND_UP(exec->args->width, 32);
if (surf->offset > obj->base.size) {
DRM_ERROR("surface offset %d > BO size %zd\n",
surf->offset, obj->base.size);
return -EINVAL;
}
if ((obj->base.size - surf->offset) / VC4_TILE_BUFFER_SIZE <
render_tiles_stride * args->max_y_tile + args->max_x_tile) {
DRM_ERROR("MSAA tile %d, %d out of bounds "
"(bo size %zd, offset %d).\n",
args->max_x_tile, args->max_y_tile,
obj->base.size,
surf->offset);
return -EINVAL;
}
return 0;
}
static int vc4_rcl_msaa_surface_setup(struct vc4_exec_info *exec,
struct drm_gem_cma_object **obj,
struct drm_vc4_submit_rcl_surface *surf)
{
if (surf->flags != 0 || surf->bits != 0) {
DRM_ERROR("MSAA surface had nonzero flags/bits\n");
return -EINVAL;
}
if (surf->hindex == ~0)
return 0;
*obj = vc4_use_bo(exec, surf->hindex);
if (!*obj)
return -EINVAL;
if (surf->offset & 0xf) {
DRM_ERROR("MSAA write must be 16b aligned.\n");
return -EINVAL;
}
return vc4_full_res_bounds_check(exec, *obj, surf);
}
static int vc4_rcl_surface_setup(struct vc4_exec_info *exec,
struct drm_gem_cma_object **obj,
struct drm_vc4_submit_rcl_surface *surf)
{
uint8_t tiling = VC4_GET_FIELD(surf->bits,
VC4_LOADSTORE_TILE_BUFFER_TILING);
uint8_t buffer = VC4_GET_FIELD(surf->bits,
VC4_LOADSTORE_TILE_BUFFER_BUFFER);
uint8_t format = VC4_GET_FIELD(surf->bits,
VC4_LOADSTORE_TILE_BUFFER_FORMAT);
int cpp;
int ret;
if (surf->flags & ~VC4_SUBMIT_RCL_SURFACE_READ_IS_FULL_RES) {
DRM_ERROR("Extra flags set\n");
return -EINVAL;
}
if (surf->hindex == ~0)
return 0;
*obj = vc4_use_bo(exec, surf->hindex);
if (!*obj)
return -EINVAL;
if (surf->flags & VC4_SUBMIT_RCL_SURFACE_READ_IS_FULL_RES) {
if (surf == &exec->args->zs_write) {
DRM_ERROR("general zs write may not be a full-res.\n");
return -EINVAL;
}
if (surf->bits != 0) {
DRM_ERROR("load/store general bits set with "
"full res load/store.\n");
return -EINVAL;
}
ret = vc4_full_res_bounds_check(exec, *obj, surf);
if (!ret)
return ret;
return 0;
}
if (surf->bits & ~(VC4_LOADSTORE_TILE_BUFFER_TILING_MASK |
VC4_LOADSTORE_TILE_BUFFER_BUFFER_MASK |
VC4_LOADSTORE_TILE_BUFFER_FORMAT_MASK)) {
DRM_ERROR("Unknown bits in load/store: 0x%04x\n",
surf->bits);
return -EINVAL;
}
if (tiling > VC4_TILING_FORMAT_LT) {
DRM_ERROR("Bad tiling format\n");
return -EINVAL;
}
if (buffer == VC4_LOADSTORE_TILE_BUFFER_ZS) {
if (format != 0) {
DRM_ERROR("No color format should be set for ZS\n");
return -EINVAL;
}
cpp = 4;
} else if (buffer == VC4_LOADSTORE_TILE_BUFFER_COLOR) {
switch (format) {
case VC4_LOADSTORE_TILE_BUFFER_BGR565:
case VC4_LOADSTORE_TILE_BUFFER_BGR565_DITHER:
cpp = 2;
break;
case VC4_LOADSTORE_TILE_BUFFER_RGBA8888:
cpp = 4;
break;
default:
DRM_ERROR("Bad tile buffer format\n");
return -EINVAL;
}
} else {
DRM_ERROR("Bad load/store buffer %d.\n", buffer);
return -EINVAL;
}
if (surf->offset & 0xf) {
DRM_ERROR("load/store buffer must be 16b aligned.\n");
return -EINVAL;
}
if (!vc4_check_tex_size(exec, *obj, surf->offset, tiling,
exec->args->width, exec->args->height, cpp)) {
return -EINVAL;
}
return 0;
}
static int
vc4_rcl_render_config_surface_setup(struct vc4_exec_info *exec,
struct vc4_rcl_setup *setup,
struct drm_gem_cma_object **obj,
struct drm_vc4_submit_rcl_surface *surf)
{
uint8_t tiling = VC4_GET_FIELD(surf->bits,
VC4_RENDER_CONFIG_MEMORY_FORMAT);
uint8_t format = VC4_GET_FIELD(surf->bits,
VC4_RENDER_CONFIG_FORMAT);
int cpp;
if (surf->flags != 0) {
DRM_ERROR("No flags supported on render config.\n");
return -EINVAL;
}
if (surf->bits & ~(VC4_RENDER_CONFIG_MEMORY_FORMAT_MASK |
VC4_RENDER_CONFIG_FORMAT_MASK |
VC4_RENDER_CONFIG_MS_MODE_4X |
VC4_RENDER_CONFIG_DECIMATE_MODE_4X)) {
DRM_ERROR("Unknown bits in render config: 0x%04x\n",
surf->bits);
return -EINVAL;
}
if (surf->hindex == ~0)
return 0;
*obj = vc4_use_bo(exec, surf->hindex);
if (!*obj)
return -EINVAL;
if (tiling > VC4_TILING_FORMAT_LT) {
DRM_ERROR("Bad tiling format\n");
return -EINVAL;
}
switch (format) {
case VC4_RENDER_CONFIG_FORMAT_BGR565_DITHERED:
case VC4_RENDER_CONFIG_FORMAT_BGR565:
cpp = 2;
break;
case VC4_RENDER_CONFIG_FORMAT_RGBA8888:
cpp = 4;
break;
default:
DRM_ERROR("Bad tile buffer format\n");
return -EINVAL;
}
if (!vc4_check_tex_size(exec, *obj, surf->offset, tiling,
exec->args->width, exec->args->height, cpp)) {
return -EINVAL;
}
return 0;
}
int vc4_get_rcl(struct drm_device *dev, struct vc4_exec_info *exec)
{
struct vc4_rcl_setup setup = {0};
struct drm_vc4_submit_cl *args = exec->args;
bool has_bin = args->bin_cl_size != 0;
int ret;
if (args->min_x_tile > args->max_x_tile ||
args->min_y_tile > args->max_y_tile) {
DRM_ERROR("Bad render tile set (%d,%d)-(%d,%d)\n",
args->min_x_tile, args->min_y_tile,
args->max_x_tile, args->max_y_tile);
return -EINVAL;
}
if (has_bin &&
(args->max_x_tile > exec->bin_tiles_x ||
args->max_y_tile > exec->bin_tiles_y)) {
DRM_ERROR("Render tiles (%d,%d) outside of bin config "
"(%d,%d)\n",
args->max_x_tile, args->max_y_tile,
exec->bin_tiles_x, exec->bin_tiles_y);
return -EINVAL;
}
ret = vc4_rcl_render_config_surface_setup(exec, &setup,
&setup.color_write,
&args->color_write);
if (ret)
return ret;
ret = vc4_rcl_surface_setup(exec, &setup.color_read, &args->color_read);
if (ret)
return ret;
ret = vc4_rcl_surface_setup(exec, &setup.zs_read, &args->zs_read);
if (ret)
return ret;
ret = vc4_rcl_surface_setup(exec, &setup.zs_write, &args->zs_write);
if (ret)
return ret;
ret = vc4_rcl_msaa_surface_setup(exec, &setup.msaa_color_write,
&args->msaa_color_write);
if (ret)
return ret;
ret = vc4_rcl_msaa_surface_setup(exec, &setup.msaa_zs_write,
&args->msaa_zs_write);
if (ret)
return ret;
/* We shouldn't even have the job submitted to us if there's no
* surface to write out.
*/
if (!setup.color_write && !setup.zs_write &&
!setup.msaa_color_write && !setup.msaa_zs_write) {
DRM_ERROR("RCL requires color or Z/S write\n");
return -EINVAL;
}
return vc4_create_rcl_bo(dev, exec, &setup);
}

63
drivers/gpu/drm/vc4/vc4_trace.h 100644
View File

@ -0,0 +1,63 @@
/*
* Copyright (C) 2015 Broadcom
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#if !defined(_VC4_TRACE_H_) || defined(TRACE_HEADER_MULTI_READ)
#define _VC4_TRACE_H_
#include <linux/stringify.h>
#include <linux/types.h>
#include <linux/tracepoint.h>
#undef TRACE_SYSTEM
#define TRACE_SYSTEM vc4
#define TRACE_INCLUDE_FILE vc4_trace
TRACE_EVENT(vc4_wait_for_seqno_begin,
TP_PROTO(struct drm_device *dev, uint64_t seqno, uint64_t timeout),
TP_ARGS(dev, seqno, timeout),
TP_STRUCT__entry(
__field(u32, dev)
__field(u64, seqno)
__field(u64, timeout)
),
TP_fast_assign(
__entry->dev = dev->primary->index;
__entry->seqno = seqno;
__entry->timeout = timeout;
),
TP_printk("dev=%u, seqno=%llu, timeout=%llu",
__entry->dev, __entry->seqno, __entry->timeout)
);
TRACE_EVENT(vc4_wait_for_seqno_end,
TP_PROTO(struct drm_device *dev, uint64_t seqno),
TP_ARGS(dev, seqno),
TP_STRUCT__entry(
__field(u32, dev)
__field(u64, seqno)
),
TP_fast_assign(
__entry->dev = dev->primary->index;
__entry->seqno = seqno;
),
TP_printk("dev=%u, seqno=%llu",
__entry->dev, __entry->seqno)
);
#endif /* _VC4_TRACE_H_ */
/* This part must be outside protection */
#undef TRACE_INCLUDE_PATH
#define TRACE_INCLUDE_PATH .
#include <trace/define_trace.h>

14
drivers/gpu/drm/vc4/vc4_trace_points.c 100644
View File

@ -0,0 +1,14 @@
/*
* Copyright (C) 2015 Broadcom
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include "vc4_drv.h"
#ifndef __CHECKER__
#define CREATE_TRACE_POINTS
#include "vc4_trace.h"
#endif

37
drivers/gpu/drm/vc4/vc4_v3d.c
View File

@ -144,6 +144,21 @@ int vc4_v3d_debugfs_ident(struct seq_file *m, void *unused)
}
#endif /* CONFIG_DEBUG_FS */
/*
* Asks the firmware to turn on power to the V3D engine.
*
* This may be doable with just the clocks interface, though this
* packet does some other register setup from the firmware, too.
*/
int
vc4_v3d_set_power(struct vc4_dev *vc4, bool on)
{
if (on)
return pm_generic_poweroff(&vc4->v3d->pdev->dev);
else
return pm_generic_resume(&vc4->v3d->pdev->dev);
}
static void vc4_v3d_init_hw(struct drm_device *dev)
{
struct vc4_dev *vc4 = to_vc4_dev(dev);
@ -161,6 +176,7 @@ static int vc4_v3d_bind(struct device *dev, struct device *master, void *data)
struct drm_device *drm = dev_get_drvdata(master);
struct vc4_dev *vc4 = to_vc4_dev(drm);
struct vc4_v3d *v3d = NULL;
int ret;
v3d = devm_kzalloc(&pdev->dev, sizeof(*v3d), GFP_KERNEL);
if (!v3d)
@ -180,8 +196,20 @@ static int vc4_v3d_bind(struct device *dev, struct device *master, void *data)
return -EINVAL;
}
/* Reset the binner overflow address/size at setup, to be sure
* we don't reuse an old one.
*/
V3D_WRITE(V3D_BPOA, 0);
V3D_WRITE(V3D_BPOS, 0);
vc4_v3d_init_hw(drm);
ret = drm_irq_install(drm, platform_get_irq(pdev, 0));
if (ret) {
DRM_ERROR("Failed to install IRQ handler\n");
return ret;
}
return 0;
}
@ -191,6 +219,15 @@ static void vc4_v3d_unbind(struct device *dev, struct device *master,
struct drm_device *drm = dev_get_drvdata(master);
struct vc4_dev *vc4 = to_vc4_dev(drm);
drm_irq_uninstall(drm);
/* Disable the binner's overflow memory address, so the next
* driver probe (if any) doesn't try to reuse our old
* allocation.
*/
V3D_WRITE(V3D_BPOA, 0);
V3D_WRITE(V3D_BPOS, 0);
vc4->v3d = NULL;
}

900
drivers/gpu/drm/vc4/vc4_validate.c 100644
View File

@ -0,0 +1,900 @@
/*
* Copyright © 2014 Broadcom
*
* 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 (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 NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
/**
* Command list validator for VC4.
*
* The VC4 has no IOMMU between it and system memory. So, a user with
* access to execute command lists could escalate privilege by
* overwriting system memory (drawing to it as a framebuffer) or
* reading system memory it shouldn't (reading it as a texture, or
* uniform data, or vertex data).
*
* This validates command lists to ensure that all accesses are within
* the bounds of the GEM objects referenced. It explicitly whitelists
* packets, and looks at the offsets in any address fields to make
* sure they're constrained within the BOs they reference.
*
* Note that because of the validation that's happening anyway, this
* is where GEM relocation processing happens.
*/
#include "uapi/drm/vc4_drm.h"
#include "vc4_drv.h"
#include "vc4_packet.h"
#define VALIDATE_ARGS \
struct vc4_exec_info *exec, \
void *validated, \
void *untrusted
/** Return the width in pixels of a 64-byte microtile. */
static uint32_t
utile_width(int cpp)
{
switch (cpp) {
case 1:
case 2:
return 8;
case 4:
return 4;
case 8:
return 2;
default:
DRM_ERROR("unknown cpp: %d\n", cpp);
return 1;
}
}
/** Return the height in pixels of a 64-byte microtile. */
static uint32_t
utile_height(int cpp)
{
switch (cpp) {
case 1:
return 8;
case 2:
case 4:
case 8:
return 4;
default:
DRM_ERROR("unknown cpp: %d\n", cpp);
return 1;
}
}
/**
* The texture unit decides what tiling format a particular miplevel is using
* this function, so we lay out our miptrees accordingly.
*/
static bool
size_is_lt(uint32_t width, uint32_t height, int cpp)
{
return (width <= 4 * utile_width(cpp) ||
height <= 4 * utile_height(cpp));
}
struct drm_gem_cma_object *
vc4_use_bo(struct vc4_exec_info *exec, uint32_t hindex)
{
struct drm_gem_cma_object *obj;
struct vc4_bo *bo;
if (hindex >= exec->bo_count) {
DRM_ERROR("BO index %d greater than BO count %d\n",
hindex, exec->bo_count);
return NULL;
}
obj = exec->bo[hindex];
bo = to_vc4_bo(&obj->base);
if (bo->validated_shader) {
DRM_ERROR("Trying to use shader BO as something other than "
"a shader\n");
return NULL;
}
return obj;
}
static struct drm_gem_cma_object *
vc4_use_handle(struct vc4_exec_info *exec, uint32_t gem_handles_packet_index)
{
return vc4_use_bo(exec, exec->bo_index[gem_handles_packet_index]);
}
static bool
validate_bin_pos(struct vc4_exec_info *exec, void *untrusted, uint32_t pos)
{
/* Note that the untrusted pointer passed to these functions is
* incremented past the packet byte.
*/
return (untrusted - 1 == exec->bin_u + pos);
}
static uint32_t
gl_shader_rec_size(uint32_t pointer_bits)
{
uint32_t attribute_count = pointer_bits & 7;
bool extended = pointer_bits & 8;
if (attribute_count == 0)
attribute_count = 8;
if (extended)
return 100 + attribute_count * 4;
else
return 36 + attribute_count * 8;
}
bool
vc4_check_tex_size(struct vc4_exec_info *exec, struct drm_gem_cma_object *fbo,
uint32_t offset, uint8_t tiling_format,
uint32_t width, uint32_t height, uint8_t cpp)
{
uint32_t aligned_width, aligned_height, stride, size;
uint32_t utile_w = utile_width(cpp);
uint32_t utile_h = utile_height(cpp);
/* The shaded vertex format stores signed 12.4 fixed point
* (-2048,2047) offsets from the viewport center, so we should
* never have a render target larger than 4096. The texture
* unit can only sample from 2048x2048, so it's even more
* restricted. This lets us avoid worrying about overflow in
* our math.
*/
if (width > 4096 || height > 4096) {
DRM_ERROR("Surface dimesions (%d,%d) too large", width, height);
return false;
}
switch (tiling_format) {
case VC4_TILING_FORMAT_LINEAR:
aligned_width = round_up(width, utile_w);
aligned_height = height;
break;
case VC4_TILING_FORMAT_T:
aligned_width = round_up(width, utile_w * 8);
aligned_height = round_up(height, utile_h * 8);
break;
case VC4_TILING_FORMAT_LT:
aligned_width = round_up(width, utile_w);
aligned_height = round_up(height, utile_h);
break;
default:
DRM_ERROR("buffer tiling %d unsupported\n", tiling_format);
return false;
}
stride = aligned_width * cpp;
size = stride * aligned_height;
if (size + offset < size ||
size + offset > fbo->base.size) {
DRM_ERROR("Overflow in %dx%d (%dx%d) fbo size (%d + %d > %zd)\n",
width, height,
aligned_width, aligned_height,
size, offset, fbo->base.size);
return false;
}
return true;
}
static int
validate_flush(VALIDATE_ARGS)
{
if (!validate_bin_pos(exec, untrusted, exec->args->bin_cl_size - 1)) {
DRM_ERROR("Bin CL must end with VC4_PACKET_FLUSH\n");
return -EINVAL;
}
exec->found_flush = true;
return 0;
}
static int
validate_start_tile_binning(VALIDATE_ARGS)
{
if (exec->found_start_tile_binning_packet) {
DRM_ERROR("Duplicate VC4_PACKET_START_TILE_BINNING\n");
return -EINVAL;
}
exec->found_start_tile_binning_packet = true;
if (!exec->found_tile_binning_mode_config_packet) {
DRM_ERROR("missing VC4_PACKET_TILE_BINNING_MODE_CONFIG\n");
return -EINVAL;
}
return 0;
}
static int
validate_increment_semaphore(VALIDATE_ARGS)
{
if (!validate_bin_pos(exec, untrusted, exec->args->bin_cl_size - 2)) {
DRM_ERROR("Bin CL must end with "
"VC4_PACKET_INCREMENT_SEMAPHORE\n");
return -EINVAL;
}
exec->found_increment_semaphore_packet = true;
return 0;
}
static int
validate_indexed_prim_list(VALIDATE_ARGS)
{
struct drm_gem_cma_object *ib;
uint32_t length = *(uint32_t *)(untrusted + 1);
uint32_t offset = *(uint32_t *)(untrusted + 5);
uint32_t max_index = *(uint32_t *)(untrusted + 9);
uint32_t index_size = (*(uint8_t *)(untrusted + 0) >> 4) ? 2 : 1;
struct vc4_shader_state *shader_state;
/* Check overflow condition */
if (exec->shader_state_count == 0) {
DRM_ERROR("shader state must precede primitives\n");
return -EINVAL;
}
shader_state = &exec->shader_state[exec->shader_state_count - 1];
if (max_index > shader_state->max_index)
shader_state->max_index = max_index;
ib = vc4_use_handle(exec, 0);
if (!ib)
return -EINVAL;
if (offset > ib->base.size ||
(ib->base.size - offset) / index_size < length) {
DRM_ERROR("IB access overflow (%d + %d*%d > %zd)\n",
offset, length, index_size, ib->base.size);
return -EINVAL;
}
*(uint32_t *)(validated + 5) = ib->paddr + offset;
return 0;
}
static int
validate_gl_array_primitive(VALIDATE_ARGS)
{
uint32_t length = *(uint32_t *)(untrusted + 1);
uint32_t base_index = *(uint32_t *)(untrusted + 5);
uint32_t max_index;
struct vc4_shader_state *shader_state;
/* Check overflow condition */
if (exec->shader_state_count == 0) {
DRM_ERROR("shader state must precede primitives\n");
return -EINVAL;
}
shader_state = &exec->shader_state[exec->shader_state_count - 1];
if (length + base_index < length) {
DRM_ERROR("primitive vertex count overflow\n");
return -EINVAL;
}
max_index = length + base_index - 1;
if (max_index > shader_state->max_index)
shader_state->max_index = max_index;
return 0;
}
static int
validate_gl_shader_state(VALIDATE_ARGS)
{
uint32_t i = exec->shader_state_count++;
if (i >= exec->shader_state_size) {
DRM_ERROR("More requests for shader states than declared\n");
return -EINVAL;
}
exec->shader_state[i].addr = *(uint32_t *)untrusted;
exec->shader_state[i].max_index = 0;
if (exec->shader_state[i].addr & ~0xf) {
DRM_ERROR("high bits set in GL shader rec reference\n");
return -EINVAL;
}
*(uint32_t *)validated = (exec->shader_rec_p +
exec->shader_state[i].addr);
exec->shader_rec_p +=
roundup(gl_shader_rec_size(exec->shader_state[i].addr), 16);
return 0;
}
static int
validate_tile_binning_config(VALIDATE_ARGS)
{
struct drm_device *dev = exec->exec_bo->base.dev;
struct vc4_bo *tile_bo;
uint8_t flags;
uint32_t tile_state_size, tile_alloc_size;
uint32_t tile_count;
if (exec->found_tile_binning_mode_config_packet) {
DRM_ERROR("Duplicate VC4_PACKET_TILE_BINNING_MODE_CONFIG\n");
return -EINVAL;
}
exec->found_tile_binning_mode_config_packet = true;
exec->bin_tiles_x = *(uint8_t *)(untrusted + 12);
exec->bin_tiles_y = *(uint8_t *)(untrusted + 13);
tile_count = exec->bin_tiles_x * exec->bin_tiles_y;
flags = *(uint8_t *)(untrusted + 14);
if (exec->bin_tiles_x == 0 ||
exec->bin_tiles_y == 0) {
DRM_ERROR("Tile binning config of %dx%d too small\n",
exec->bin_tiles_x, exec->bin_tiles_y);
return -EINVAL;
}
if (flags & (VC4_BIN_CONFIG_DB_NON_MS |
VC4_BIN_CONFIG_TILE_BUFFER_64BIT)) {
DRM_ERROR("unsupported binning config flags 0x%02x\n", flags);
return -EINVAL;
}
/* The tile state data array is 48 bytes per tile, and we put it at
* the start of a BO containing both it and the tile alloc.
*/
tile_state_size = 48 * tile_count;
/* Since the tile alloc array will follow us, align. */
exec->tile_alloc_offset = roundup(tile_state_size, 4096);
*(uint8_t *)(validated + 14) =
((flags & ~(VC4_BIN_CONFIG_ALLOC_INIT_BLOCK_SIZE_MASK |
VC4_BIN_CONFIG_ALLOC_BLOCK_SIZE_MASK)) |
VC4_BIN_CONFIG_AUTO_INIT_TSDA |
VC4_SET_FIELD(VC4_BIN_CONFIG_ALLOC_INIT_BLOCK_SIZE_32,
VC4_BIN_CONFIG_ALLOC_INIT_BLOCK_SIZE) |
VC4_SET_FIELD(VC4_BIN_CONFIG_ALLOC_BLOCK_SIZE_128,
VC4_BIN_CONFIG_ALLOC_BLOCK_SIZE));
/* Initial block size. */
tile_alloc_size = 32 * tile_count;
/*
* The initial allocation gets rounded to the next 256 bytes before
* the hardware starts fulfilling further allocations.
*/
tile_alloc_size = roundup(tile_alloc_size, 256);
/* Add space for the extra allocations. This is what gets used first,
* before overflow memory. It must have at least 4096 bytes, but we
* want to avoid overflow memory usage if possible.
*/
tile_alloc_size += 1024 * 1024;
tile_bo = vc4_bo_create(dev, exec->tile_alloc_offset + tile_alloc_size,
true);
exec->tile_bo = &tile_bo->base;
if (!exec->tile_bo)
return -ENOMEM;
list_add_tail(&tile_bo->unref_head, &exec->unref_list);
/* tile alloc address. */
*(uint32_t *)(validated + 0) = (exec->tile_bo->paddr +
exec->tile_alloc_offset);
/* tile alloc size. */
*(uint32_t *)(validated + 4) = tile_alloc_size;
/* tile state address. */
*(uint32_t *)(validated + 8) = exec->tile_bo->paddr;
return 0;
}
static int
validate_gem_handles(VALIDATE_ARGS)
{
memcpy(exec->bo_index, untrusted, sizeof(exec->bo_index));
return 0;
}
#define VC4_DEFINE_PACKET(packet, func) \
[packet] = { packet ## _SIZE, #packet, func }
static const struct cmd_info {
uint16_t len;
const char *name;
int (*func)(struct vc4_exec_info *exec, void *validated,
void *untrusted);
} cmd_info[] = {
VC4_DEFINE_PACKET(VC4_PACKET_HALT, NULL),
VC4_DEFINE_PACKET(VC4_PACKET_NOP, NULL),
VC4_DEFINE_PACKET(VC4_PACKET_FLUSH, validate_flush),
VC4_DEFINE_PACKET(VC4_PACKET_FLUSH_ALL, NULL),
VC4_DEFINE_PACKET(VC4_PACKET_START_TILE_BINNING,
validate_start_tile_binning),
VC4_DEFINE_PACKET(VC4_PACKET_INCREMENT_SEMAPHORE,
validate_increment_semaphore),
VC4_DEFINE_PACKET(VC4_PACKET_GL_INDEXED_PRIMITIVE,
validate_indexed_prim_list),
VC4_DEFINE_PACKET(VC4_PACKET_GL_ARRAY_PRIMITIVE,
validate_gl_array_primitive),
VC4_DEFINE_PACKET(VC4_PACKET_PRIMITIVE_LIST_FORMAT, NULL),
VC4_DEFINE_PACKET(VC4_PACKET_GL_SHADER_STATE, validate_gl_shader_state),
VC4_DEFINE_PACKET(VC4_PACKET_CONFIGURATION_BITS, NULL),
VC4_DEFINE_PACKET(VC4_PACKET_FLAT_SHADE_FLAGS, NULL),
VC4_DEFINE_PACKET(VC4_PACKET_POINT_SIZE, NULL),
VC4_DEFINE_PACKET(VC4_PACKET_LINE_WIDTH, NULL),
VC4_DEFINE_PACKET(VC4_PACKET_RHT_X_BOUNDARY, NULL),
VC4_DEFINE_PACKET(VC4_PACKET_DEPTH_OFFSET, NULL),
VC4_DEFINE_PACKET(VC4_PACKET_CLIP_WINDOW, NULL),
VC4_DEFINE_PACKET(VC4_PACKET_VIEWPORT_OFFSET, NULL),
VC4_DEFINE_PACKET(VC4_PACKET_CLIPPER_XY_SCALING, NULL),
/* Note: The docs say this was also 105, but it was 106 in the
* initial userland code drop.
*/
VC4_DEFINE_PACKET(VC4_PACKET_CLIPPER_Z_SCALING, NULL),
VC4_DEFINE_PACKET(VC4_PACKET_TILE_BINNING_MODE_CONFIG,
validate_tile_binning_config),
VC4_DEFINE_PACKET(VC4_PACKET_GEM_HANDLES, validate_gem_handles),
};
int
vc4_validate_bin_cl(struct drm_device *dev,
void *validated,
void *unvalidated,
struct vc4_exec_info *exec)
{
uint32_t len = exec->args->bin_cl_size;
uint32_t dst_offset = 0;
uint32_t src_offset = 0;
while (src_offset < len) {
void *dst_pkt = validated + dst_offset;
void *src_pkt = unvalidated + src_offset;
u8 cmd = *(uint8_t *)src_pkt;
const struct cmd_info *info;
if (cmd >= ARRAY_SIZE(cmd_info)) {
DRM_ERROR("0x%08x: packet %d out of bounds\n",
src_offset, cmd);
return -EINVAL;
}
info = &cmd_info[cmd];
if (!info->name) {
DRM_ERROR("0x%08x: packet %d invalid\n",
src_offset, cmd);
return -EINVAL;
}
if (src_offset + info->len > len) {
DRM_ERROR("0x%08x: packet %d (%s) length 0x%08x "
"exceeds bounds (0x%08x)\n",
src_offset, cmd, info->name, info->len,
src_offset + len);
return -EINVAL;
}
if (cmd != VC4_PACKET_GEM_HANDLES)
memcpy(dst_pkt, src_pkt, info->len);
if (info->func && info->func(exec,
dst_pkt + 1,
src_pkt + 1)) {
DRM_ERROR("0x%08x: packet %d (%s) failed to validate\n",
src_offset, cmd, info->name);
return -EINVAL;
}
src_offset += info->len;
/* GEM handle loading doesn't produce HW packets. */
if (cmd != VC4_PACKET_GEM_HANDLES)
dst_offset += info->len;
/* When the CL hits halt, it'll stop reading anything else. */
if (cmd == VC4_PACKET_HALT)
break;
}
exec->ct0ea = exec->ct0ca + dst_offset;
if (!exec->found_start_tile_binning_packet) {
DRM_ERROR("Bin CL missing VC4_PACKET_START_TILE_BINNING\n");
return -EINVAL;
}
/* The bin CL must be ended with INCREMENT_SEMAPHORE and FLUSH. The
* semaphore is used to trigger the render CL to start up, and the
* FLUSH is what caps the bin lists with
* VC4_PACKET_RETURN_FROM_SUB_LIST (so they jump back to the main
* render CL when they get called to) and actually triggers the queued
* semaphore increment.
*/
if (!exec->found_increment_semaphore_packet || !exec->found_flush) {
DRM_ERROR("Bin CL missing VC4_PACKET_INCREMENT_SEMAPHORE + "
"VC4_PACKET_FLUSH\n");
return -EINVAL;
}
return 0;
}
static bool
reloc_tex(struct vc4_exec_info *exec,
void *uniform_data_u,
struct vc4_texture_sample_info *sample,
uint32_t texture_handle_index)
{
struct drm_gem_cma_object *tex;
uint32_t p0 = *(uint32_t *)(uniform_data_u + sample->p_offset[0]);
uint32_t p1 = *(uint32_t *)(uniform_data_u + sample->p_offset[1]);
uint32_t p2 = (sample->p_offset[2] != ~0 ?
*(uint32_t *)(uniform_data_u + sample->p_offset[2]) : 0);
uint32_t p3 = (sample->p_offset[3] != ~0 ?
*(uint32_t *)(uniform_data_u + sample->p_offset[3]) : 0);
uint32_t *validated_p0 = exec->uniforms_v + sample->p_offset[0];
uint32_t offset = p0 & VC4_TEX_P0_OFFSET_MASK;
uint32_t miplevels = VC4_GET_FIELD(p0, VC4_TEX_P0_MIPLVLS);
uint32_t width = VC4_GET_FIELD(p1, VC4_TEX_P1_WIDTH);
uint32_t height = VC4_GET_FIELD(p1, VC4_TEX_P1_HEIGHT);
uint32_t cpp, tiling_format, utile_w, utile_h;
uint32_t i;
uint32_t cube_map_stride = 0;
enum vc4_texture_data_type type;
tex = vc4_use_bo(exec, texture_handle_index);
if (!tex)
return false;
if (sample->is_direct) {
uint32_t remaining_size = tex->base.size - p0;
if (p0 > tex->base.size - 4) {
DRM_ERROR("UBO offset greater than UBO size\n");
goto fail;
}
if (p1 > remaining_size - 4) {
DRM_ERROR("UBO clamp would allow reads "
"outside of UBO\n");
goto fail;
}
*validated_p0 = tex->paddr + p0;
return true;
}
if (width == 0)
width = 2048;
if (height == 0)
height = 2048;
if (p0 & VC4_TEX_P0_CMMODE_MASK) {
if (VC4_GET_FIELD(p2, VC4_TEX_P2_PTYPE) ==
VC4_TEX_P2_PTYPE_CUBE_MAP_STRIDE)
cube_map_stride = p2 & VC4_TEX_P2_CMST_MASK;
if (VC4_GET_FIELD(p3, VC4_TEX_P2_PTYPE) ==
VC4_TEX_P2_PTYPE_CUBE_MAP_STRIDE) {
if (cube_map_stride) {
DRM_ERROR("Cube map stride set twice\n");
goto fail;
}
cube_map_stride = p3 & VC4_TEX_P2_CMST_MASK;
}
if (!cube_map_stride) {
DRM_ERROR("Cube map stride not set\n");
goto fail;
}
}
type = (VC4_GET_FIELD(p0, VC4_TEX_P0_TYPE) |
(VC4_GET_FIELD(p1, VC4_TEX_P1_TYPE4) << 4));
switch (type) {
case VC4_TEXTURE_TYPE_RGBA8888:
case VC4_TEXTURE_TYPE_RGBX8888:
case VC4_TEXTURE_TYPE_RGBA32R:
cpp = 4;
break;
case VC4_TEXTURE_TYPE_RGBA4444:
case VC4_TEXTURE_TYPE_RGBA5551:
case VC4_TEXTURE_TYPE_RGB565:
case VC4_TEXTURE_TYPE_LUMALPHA:
case VC4_TEXTURE_TYPE_S16F:
case VC4_TEXTURE_TYPE_S16:
cpp = 2;
break;
case VC4_TEXTURE_TYPE_LUMINANCE:
case VC4_TEXTURE_TYPE_ALPHA:
case VC4_TEXTURE_TYPE_S8:
cpp = 1;
break;
case VC4_TEXTURE_TYPE_ETC1:
case VC4_TEXTURE_TYPE_BW1:
case VC4_TEXTURE_TYPE_A4:
case VC4_TEXTURE_TYPE_A1:
case VC4_TEXTURE_TYPE_RGBA64:
case VC4_TEXTURE_TYPE_YUV422R:
default:
DRM_ERROR("Texture format %d unsupported\n", type);
goto fail;
}
utile_w = utile_width(cpp);
utile_h = utile_height(cpp);
if (type == VC4_TEXTURE_TYPE_RGBA32R) {
tiling_format = VC4_TILING_FORMAT_LINEAR;
} else {
if (size_is_lt(width, height, cpp))
tiling_format = VC4_TILING_FORMAT_LT;
else
tiling_format = VC4_TILING_FORMAT_T;
}
if (!vc4_check_tex_size(exec, tex, offset + cube_map_stride * 5,
tiling_format, width, height, cpp)) {
goto fail;
}
/* The mipmap levels are stored before the base of the texture. Make
* sure there is actually space in the BO.
*/
for (i = 1; i <= miplevels; i++) {
uint32_t level_width = max(width >> i, 1u);
uint32_t level_height = max(height >> i, 1u);
uint32_t aligned_width, aligned_height;
uint32_t level_size;
/* Once the levels get small enough, they drop from T to LT. */
if (tiling_format == VC4_TILING_FORMAT_T &&
size_is_lt(level_width, level_height, cpp)) {
tiling_format = VC4_TILING_FORMAT_LT;
}
switch (tiling_format) {
case VC4_TILING_FORMAT_T:
aligned_width = round_up(level_width, utile_w * 8);
aligned_height = round_up(level_height, utile_h * 8);
break;
case VC4_TILING_FORMAT_LT:
aligned_width = round_up(level_width, utile_w);
aligned_height = round_up(level_height, utile_h);
break;
default:
aligned_width = round_up(level_width, utile_w);
aligned_height = level_height;
break;
}
level_size = aligned_width * cpp * aligned_height;
if (offset < level_size) {
DRM_ERROR("Level %d (%dx%d -> %dx%d) size %db "
"overflowed buffer bounds (offset %d)\n",
i, level_width, level_height,
aligned_width, aligned_height,
level_size, offset);
goto fail;
}
offset -= level_size;
}
*validated_p0 = tex->paddr + p0;
return true;
fail:
DRM_INFO("Texture p0 at %d: 0x%08x\n", sample->p_offset[0], p0);
DRM_INFO("Texture p1 at %d: 0x%08x\n", sample->p_offset[1], p1);
DRM_INFO("Texture p2 at %d: 0x%08x\n", sample->p_offset[2], p2);
DRM_INFO("Texture p3 at %d: 0x%08x\n", sample->p_offset[3], p3);
return false;
}
static int
validate_gl_shader_rec(struct drm_device *dev,
struct vc4_exec_info *exec,
struct vc4_shader_state *state)
{
uint32_t *src_handles;
void *pkt_u, *pkt_v;
static const uint32_t shader_reloc_offsets[] = {
4, /* fs */
16, /* vs */
28, /* cs */
};
uint32_t shader_reloc_count = ARRAY_SIZE(shader_reloc_offsets);
struct drm_gem_cma_object *bo[shader_reloc_count + 8];
uint32_t nr_attributes, nr_relocs, packet_size;
int i;
nr_attributes = state->addr & 0x7;
if (nr_attributes == 0)
nr_attributes = 8;
packet_size = gl_shader_rec_size(state->addr);
nr_relocs = ARRAY_SIZE(shader_reloc_offsets) + nr_attributes;
if (nr_relocs * 4 > exec->shader_rec_size) {
DRM_ERROR("overflowed shader recs reading %d handles "
"from %d bytes left\n",
nr_relocs, exec->shader_rec_size);
return -EINVAL;
}
src_handles = exec->shader_rec_u;
exec->shader_rec_u += nr_relocs * 4;
exec->shader_rec_size -= nr_relocs * 4;
if (packet_size > exec->shader_rec_size) {
DRM_ERROR("overflowed shader recs copying %db packet "
"from %d bytes left\n",
packet_size, exec->shader_rec_size);
return -EINVAL;
}
pkt_u = exec->shader_rec_u;
pkt_v = exec->shader_rec_v;
memcpy(pkt_v, pkt_u, packet_size);
exec->shader_rec_u += packet_size;
/* Shader recs have to be aligned to 16 bytes (due to the attribute
* flags being in the low bytes), so round the next validated shader
* rec address up. This should be safe, since we've got so many
* relocations in a shader rec packet.
*/
BUG_ON(roundup(packet_size, 16) - packet_size > nr_relocs * 4);
exec->shader_rec_v += roundup(packet_size, 16);
exec->shader_rec_size -= packet_size;
if (!(*(uint16_t *)pkt_u & VC4_SHADER_FLAG_FS_SINGLE_THREAD)) {
DRM_ERROR("Multi-threaded fragment shaders not supported.\n");
return -EINVAL;
}
for (i = 0; i < shader_reloc_count; i++) {
if (src_handles[i] > exec->bo_count) {
DRM_ERROR("Shader handle %d too big\n", src_handles[i]);
return -EINVAL;
}
bo[i] = exec->bo[src_handles[i]];
if (!bo[i])
return -EINVAL;
}
for (i = shader_reloc_count; i < nr_relocs; i++) {
bo[i] = vc4_use_bo(exec, src_handles[i]);
if (!bo[i])
return -EINVAL;
}
for (i = 0; i < shader_reloc_count; i++) {
struct vc4_validated_shader_info *validated_shader;
uint32_t o = shader_reloc_offsets[i];
uint32_t src_offset = *(uint32_t *)(pkt_u + o);
uint32_t *texture_handles_u;
void *uniform_data_u;
uint32_t tex;
*(uint32_t *)(pkt_v + o) = bo[i]->paddr + src_offset;
if (src_offset != 0) {
DRM_ERROR("Shaders must be at offset 0 of "
"the BO.\n");
return -EINVAL;
}
validated_shader = to_vc4_bo(&bo[i]->base)->validated_shader;
if (!validated_shader)
return -EINVAL;
if (validated_shader->uniforms_src_size >
exec->uniforms_size) {
DRM_ERROR("Uniforms src buffer overflow\n");
return -EINVAL;
}
texture_handles_u = exec->uniforms_u;
uniform_data_u = (texture_handles_u +
validated_shader->num_texture_samples);
memcpy(exec->uniforms_v, uniform_data_u,
validated_shader->uniforms_size);
for (tex = 0;
tex < validated_shader->num_texture_samples;
tex++) {
if (!reloc_tex(exec,
uniform_data_u,
&validated_shader->texture_samples[tex],
texture_handles_u[tex])) {
return -EINVAL;
}
}
*(uint32_t *)(pkt_v + o + 4) = exec->uniforms_p;
exec->uniforms_u += validated_shader->uniforms_src_size;
exec->uniforms_v += validated_shader->uniforms_size;
exec->uniforms_p += validated_shader->uniforms_size;
}
for (i = 0; i < nr_attributes; i++) {
struct drm_gem_cma_object *vbo =
bo[ARRAY_SIZE(shader_reloc_offsets) + i];
uint32_t o = 36 + i * 8;
uint32_t offset = *(uint32_t *)(pkt_u + o + 0);
uint32_t attr_size = *(uint8_t *)(pkt_u + o + 4) + 1;
uint32_t stride = *(uint8_t *)(pkt_u + o + 5);
uint32_t max_index;
if (state->addr & 0x8)
stride |= (*(uint32_t *)(pkt_u + 100 + i * 4)) & ~0xff;
if (vbo->base.size < offset ||
vbo->base.size - offset < attr_size) {
DRM_ERROR("BO offset overflow (%d + %d > %d)\n",
offset, attr_size, vbo->base.size);
return -EINVAL;
}
if (stride != 0) {
max_index = ((vbo->base.size - offset - attr_size) /
stride);
if (state->max_index > max_index) {
DRM_ERROR("primitives use index %d out of "
"supplied %d\n",
state->max_index, max_index);
return -EINVAL;
}
}
*(uint32_t *)(pkt_v + o) = vbo->paddr + offset;
}
return 0;
}
int
vc4_validate_shader_recs(struct drm_device *dev,
struct vc4_exec_info *exec)
{
uint32_t i;
int ret = 0;
for (i = 0; i < exec->shader_state_count; i++) {
ret = validate_gl_shader_rec(dev, exec, &exec->shader_state[i]);
if (ret)
return ret;
}
return ret;
}

141
include/uapi/drm/vc4_drm.h
View File

@ -26,14 +26,155 @@
#include "drm.h"
#define DRM_VC4_SUBMIT_CL 0x00
#define DRM_VC4_WAIT_SEQNO 0x01
#define DRM_VC4_WAIT_BO 0x02
#define DRM_VC4_CREATE_BO 0x03
#define DRM_VC4_MMAP_BO 0x04
#define DRM_VC4_CREATE_SHADER_BO 0x05
#define DRM_IOCTL_VC4_SUBMIT_CL DRM_IOWR(DRM_COMMAND_BASE + DRM_VC4_SUBMIT_CL, struct drm_vc4_submit_cl)
#define DRM_IOCTL_VC4_WAIT_SEQNO DRM_IOWR(DRM_COMMAND_BASE + DRM_VC4_WAIT_SEQNO, struct drm_vc4_wait_seqno)
#define DRM_IOCTL_VC4_WAIT_BO DRM_IOWR(DRM_COMMAND_BASE + DRM_VC4_WAIT_BO, struct drm_vc4_wait_bo)
#define DRM_IOCTL_VC4_CREATE_BO DRM_IOWR(DRM_COMMAND_BASE + DRM_VC4_CREATE_BO, struct drm_vc4_create_bo)
#define DRM_IOCTL_VC4_MMAP_BO DRM_IOWR(DRM_COMMAND_BASE + DRM_VC4_MMAP_BO, struct drm_vc4_mmap_bo)
#define DRM_IOCTL_VC4_CREATE_SHADER_BO DRM_IOWR(DRM_COMMAND_BASE + DRM_VC4_CREATE_SHADER_BO, struct drm_vc4_create_shader_bo)
struct drm_vc4_submit_rcl_surface {
__u32 hindex; /* Handle index, or ~0 if not present. */
__u32 offset; /* Offset to start of buffer. */
/*
* Bits for either render config (color_write) or load/store packet.
* Bits should all be 0 for MSAA load/stores.
*/
__u16 bits;
#define VC4_SUBMIT_RCL_SURFACE_READ_IS_FULL_RES (1 << 0)
__u16 flags;
};
/**
* struct drm_vc4_submit_cl - ioctl argument for submitting commands to the 3D
* engine.
*
* Drivers typically use GPU BOs to store batchbuffers / command lists and
* their associated state. However, because the VC4 lacks an MMU, we have to
* do validation of memory accesses by the GPU commands. If we were to store
* our commands in BOs, we'd need to do uncached readback from them to do the
* validation process, which is too expensive. Instead, userspace accumulates
* commands and associated state in plain memory, then the kernel copies the
* data to its own address space, and then validates and stores it in a GPU
* BO.
*/
struct drm_vc4_submit_cl {
/* Pointer to the binner command list.
*
* This is the first set of commands executed, which runs the
* coordinate shader to determine where primitives land on the screen,
* then writes out the state updates and draw calls necessary per tile
* to the tile allocation BO.
*/
__u64 bin_cl;
/* Pointer to the shader records.
*
* Shader records are the structures read by the hardware that contain
* pointers to uniforms, shaders, and vertex attributes. The
* reference to the shader record has enough information to determine
* how many pointers are necessary (fixed number for shaders/uniforms,
* and an attribute count), so those BO indices into bo_handles are
* just stored as __u32s before each shader record passed in.
*/
__u64 shader_rec;
/* Pointer to uniform data and texture handles for the textures
* referenced by the shader.
*
* For each shader state record, there is a set of uniform data in the
* order referenced by the record (FS, VS, then CS). Each set of
* uniform data has a __u32 index into bo_handles per texture
* sample operation, in the order the QPU_W_TMUn_S writes appear in
* the program. Following the texture BO handle indices is the actual
* uniform data.
*
* The individual uniform state blocks don't have sizes passed in,
* because the kernel has to determine the sizes anyway during shader
* code validation.
*/
__u64 uniforms;
__u64 bo_handles;
/* Size in bytes of the binner command list. */
__u32 bin_cl_size;
/* Size in bytes of the set of shader records. */
__u32 shader_rec_size;
/* Number of shader records.
*
* This could just be computed from the contents of shader_records and
* the address bits of references to them from the bin CL, but it
* keeps the kernel from having to resize some allocations it makes.
*/
__u32 shader_rec_count;
/* Size in bytes of the uniform state. */
__u32 uniforms_size;
/* Number of BO handles passed in (size is that times 4). */
__u32 bo_handle_count;
/* RCL setup: */
__u16 width;
__u16 height;
__u8 min_x_tile;
__u8 min_y_tile;
__u8 max_x_tile;
__u8 max_y_tile;
struct drm_vc4_submit_rcl_surface color_read;
struct drm_vc4_submit_rcl_surface color_write;
struct drm_vc4_submit_rcl_surface zs_read;
struct drm_vc4_submit_rcl_surface zs_write;
struct drm_vc4_submit_rcl_surface msaa_color_write;
struct drm_vc4_submit_rcl_surface msaa_zs_write;
__u32 clear_color[2];
__u32 clear_z;
__u8 clear_s;
__u32 pad:24;
#define VC4_SUBMIT_CL_USE_CLEAR_COLOR (1 << 0)
__u32 flags;
/* Returned value of the seqno of this render job (for the
* wait ioctl).
*/
__u64 seqno;
};
/**
* struct drm_vc4_wait_seqno - ioctl argument for waiting for
* DRM_VC4_SUBMIT_CL completion using its returned seqno.
*
* timeout_ns is the timeout in nanoseconds, where "0" means "don't
* block, just return the status."
*/
struct drm_vc4_wait_seqno {
__u64 seqno;
__u64 timeout_ns;
};
/**
* struct drm_vc4_wait_bo - ioctl argument for waiting for
* completion of the last DRM_VC4_SUBMIT_CL on a BO.
*
* This is useful for cases where multiple processes might be
* rendering to a BO and you want to wait for all rendering to be
* completed.
*/
struct drm_vc4_wait_bo {
__u32 handle;
__u32 pad;
__u64 timeout_ns;
};
/**
* struct drm_vc4_create_bo - ioctl argument for creating VC4 BOs.
*