From ed63bb1d1f8469586006a9ca63c42344401aa2ab Mon Sep 17 00:00:00 2001 From: Greg Hackmann Date: Thu, 13 Jun 2019 15:34:06 -0700 Subject: dma-buf: give each buffer a full-fledged inode By traversing /proc/*/fd and /proc/*/map_files, processes with CAP_ADMIN can get a lot of fine-grained data about how shmem buffers are shared among processes. stat(2) on each entry gives the caller a unique ID (st_ino), the buffer's size (st_size), and even the number of pages currently charged to the buffer (st_blocks / 512). In contrast, all dma-bufs share the same anonymous inode. So while we can count how many dma-buf fds or mappings a process has, we can't get the size of the backing buffers or tell if two entries point to the same dma-buf. On systems with debugfs, we can get a per-buffer breakdown of size and reference count, but can't tell which processes are actually holding the references to each buffer. Replace the singleton inode with full-fledged inodes allocated by alloc_anon_inode(). This involves creating and mounting a mini-pseudo-filesystem for dma-buf, following the example in fs/aio.c. Signed-off-by: Greg Hackmann Signed-off-by: Chenbo Feng Signed-off-by: Sumit Semwal Link: https://patchwork.freedesktop.org/patch/msgid/20190613223408.139221-2-fengc@google.com --- include/uapi/linux/magic.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/uapi') diff --git a/include/uapi/linux/magic.h b/include/uapi/linux/magic.h index f8c00045d537..665e18627f78 100644 --- a/include/uapi/linux/magic.h +++ b/include/uapi/linux/magic.h @@ -91,5 +91,6 @@ #define UDF_SUPER_MAGIC 0x15013346 #define BALLOON_KVM_MAGIC 0x13661366 #define ZSMALLOC_MAGIC 0x58295829 +#define DMA_BUF_MAGIC 0x444d4142 /* "DMAB" */ #endif /* __LINUX_MAGIC_H__ */ -- cgit v1.2.3 From bb2bb903042517b8fb17b2bc21e00512f2dcac01 Mon Sep 17 00:00:00 2001 From: Greg Hackmann Date: Thu, 13 Jun 2019 15:34:07 -0700 Subject: dma-buf: add DMA_BUF_SET_NAME ioctls This patch adds complimentary DMA_BUF_SET_NAME ioctls, which lets userspace processes attach a free-form name to each buffer. This information can be extremely helpful for tracking and accounting shared buffers. For example, on Android, we know what each buffer will be used for at allocation time: GL, multimedia, camera, etc. The userspace allocator can use DMA_BUF_SET_NAME to associate that information with the buffer, so we can later give developers a breakdown of how much memory they're allocating for graphics, camera, etc. Signed-off-by: Greg Hackmann Signed-off-by: Chenbo Feng Signed-off-by: Sumit Semwal Link: https://patchwork.freedesktop.org/patch/msgid/20190613223408.139221-3-fengc@google.com --- drivers/dma-buf/dma-buf.c | 65 ++++++++++++++++++++++++++++++++++++++++++-- include/linux/dma-buf.h | 5 +++- include/uapi/linux/dma-buf.h | 3 ++ 3 files changed, 69 insertions(+), 4 deletions(-) (limited to 'include/uapi') diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c index 3612ccededd6..ab96410d1dcd 100644 --- a/drivers/dma-buf/dma-buf.c +++ b/drivers/dma-buf/dma-buf.c @@ -48,8 +48,24 @@ struct dma_buf_list { static struct dma_buf_list db_list; +static char *dmabuffs_dname(struct dentry *dentry, char *buffer, int buflen) +{ + struct dma_buf *dmabuf; + char name[DMA_BUF_NAME_LEN]; + size_t ret = 0; + + dmabuf = dentry->d_fsdata; + mutex_lock(&dmabuf->lock); + if (dmabuf->name) + ret = strlcpy(name, dmabuf->name, DMA_BUF_NAME_LEN); + mutex_unlock(&dmabuf->lock); + + return dynamic_dname(dentry, buffer, buflen, "/%s:%s", + dentry->d_name.name, ret > 0 ? name : ""); +} + static const struct dentry_operations dma_buf_dentry_ops = { - .d_dname = simple_dname, + .d_dname = dmabuffs_dname, }; static struct vfsmount *dma_buf_mnt; @@ -301,6 +317,43 @@ out: return events; } +/** + * dma_buf_set_name - Set a name to a specific dma_buf to track the usage. + * The name of the dma-buf buffer can only be set when the dma-buf is not + * attached to any devices. It could theoritically support changing the + * name of the dma-buf if the same piece of memory is used for multiple + * purpose between different devices. + * + * @dmabuf [in] dmabuf buffer that will be renamed. + * @buf: [in] A piece of userspace memory that contains the name of + * the dma-buf. + * + * Returns 0 on success. If the dma-buf buffer is already attached to + * devices, return -EBUSY. + * + */ +static long dma_buf_set_name(struct dma_buf *dmabuf, const char __user *buf) +{ + char *name = strndup_user(buf, DMA_BUF_NAME_LEN); + long ret = 0; + + if (IS_ERR(name)) + return PTR_ERR(name); + + mutex_lock(&dmabuf->lock); + if (!list_empty(&dmabuf->attachments)) { + ret = -EBUSY; + kfree(name); + goto out_unlock; + } + kfree(dmabuf->name); + dmabuf->name = name; + +out_unlock: + mutex_unlock(&dmabuf->lock); + return ret; +} + static long dma_buf_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { @@ -339,6 +392,10 @@ static long dma_buf_ioctl(struct file *file, ret = dma_buf_begin_cpu_access(dmabuf, direction); return ret; + + case DMA_BUF_SET_NAME: + return dma_buf_set_name(dmabuf, (const char __user *)arg); + default: return -ENOTTY; } @@ -380,6 +437,7 @@ static struct file *dma_buf_getfile(struct dma_buf *dmabuf, int flags) goto err_alloc_file; file->f_flags = flags & (O_ACCMODE | O_NONBLOCK); file->private_data = dmabuf; + file->f_path.dentry->d_fsdata = dmabuf; return file; @@ -1112,12 +1170,13 @@ static int dma_buf_debug_show(struct seq_file *s, void *unused) continue; } - seq_printf(s, "%08zu\t%08x\t%08x\t%08ld\t%s\t%08lu\n", + seq_printf(s, "%08zu\t%08x\t%08x\t%08ld\t%s\t%08lu\t%s\n", buf_obj->size, buf_obj->file->f_flags, buf_obj->file->f_mode, file_count(buf_obj->file), buf_obj->exp_name, - file_inode(buf_obj->file)->i_ino); + file_inode(buf_obj->file)->i_ino, + buf_obj->name ?: ""); robj = buf_obj->resv; while (true) { diff --git a/include/linux/dma-buf.h b/include/linux/dma-buf.h index 8a327566d7f4..01ad5b942a6f 100644 --- a/include/linux/dma-buf.h +++ b/include/linux/dma-buf.h @@ -280,10 +280,12 @@ struct dma_buf_ops { * @file: file pointer used for sharing buffers across, and for refcounting. * @attachments: list of dma_buf_attachment that denotes all devices attached. * @ops: dma_buf_ops associated with this buffer object. - * @lock: used internally to serialize list manipulation, attach/detach and vmap/unmap + * @lock: used internally to serialize list manipulation, attach/detach and + * vmap/unmap, and accesses to name * @vmapping_counter: used internally to refcnt the vmaps * @vmap_ptr: the current vmap ptr if vmapping_counter > 0 * @exp_name: name of the exporter; useful for debugging. + * @name: userspace-provided name; useful for accounting and debugging. * @owner: pointer to exporter module; used for refcounting when exporter is a * kernel module. * @list_node: node for dma_buf accounting and debugging. @@ -311,6 +313,7 @@ struct dma_buf { unsigned vmapping_counter; void *vmap_ptr; const char *exp_name; + const char *name; struct module *owner; struct list_head list_node; void *priv; diff --git a/include/uapi/linux/dma-buf.h b/include/uapi/linux/dma-buf.h index d75df5210a4a..dbc7092e04b5 100644 --- a/include/uapi/linux/dma-buf.h +++ b/include/uapi/linux/dma-buf.h @@ -35,7 +35,10 @@ struct dma_buf_sync { #define DMA_BUF_SYNC_VALID_FLAGS_MASK \ (DMA_BUF_SYNC_RW | DMA_BUF_SYNC_END) +#define DMA_BUF_NAME_LEN 32 + #define DMA_BUF_BASE 'b' #define DMA_BUF_IOCTL_SYNC _IOW(DMA_BUF_BASE, 0, struct dma_buf_sync) +#define DMA_BUF_SET_NAME _IOW(DMA_BUF_BASE, 1, const char *) #endif -- cgit v1.2.3 From 7786fd1087774c6090775932290f33ac73044f41 Mon Sep 17 00:00:00 2001 From: Boris Brezillon Date: Tue, 18 Jun 2019 10:16:48 +0200 Subject: drm/panfrost: Expose performance counters through unstable ioctls Expose performance counters through 2 driver specific ioctls: one to enable/disable the perfcnt block, and one to dump the counter values. There are discussions to expose global performance monitors (those counters that can't be retrieved on a per-job basis) in a consistent way, but this is likely to take time to settle on something that works for various HW/users. The ioctls are marked unstable so we can get rid of them when the time comes. We initally went for a debugfs-based interface, but this was making the transition to per-FD address space more complicated (we need to specify the namespace the GPU has to use when dumping the perf counters), hence the decision to switch back to driver specific ioctls which are passed the FD they operate on and thus will have a dedicated address space attached to them. Other than that, the implementation is pretty simple: it basically dumps all counters and copy the values to a userspace buffer. The parsing is left to userspace which has to know the specific layout that's used by the GPU (layout differs on a per-revision basis). Signed-off-by: Boris Brezillon Acked-by: Alyssa Rosenzweig Signed-off-by: Rob Herring Link: https://patchwork.freedesktop.org/patch/msgid/20190618081648.17297-5-boris.brezillon@collabora.com --- drivers/gpu/drm/panfrost/Makefile | 3 +- drivers/gpu/drm/panfrost/panfrost_device.c | 8 + drivers/gpu/drm/panfrost/panfrost_device.h | 3 + drivers/gpu/drm/panfrost/panfrost_drv.c | 4 + drivers/gpu/drm/panfrost/panfrost_gpu.c | 7 + drivers/gpu/drm/panfrost/panfrost_perfcnt.c | 329 ++++++++++++++++++++++++++++ drivers/gpu/drm/panfrost/panfrost_perfcnt.h | 18 ++ drivers/gpu/drm/panfrost/panfrost_regs.h | 19 ++ include/uapi/drm/panfrost_drm.h | 24 ++ 9 files changed, 414 insertions(+), 1 deletion(-) create mode 100644 drivers/gpu/drm/panfrost/panfrost_perfcnt.c create mode 100644 drivers/gpu/drm/panfrost/panfrost_perfcnt.h (limited to 'include/uapi') diff --git a/drivers/gpu/drm/panfrost/Makefile b/drivers/gpu/drm/panfrost/Makefile index 6de72d13c58f..ecf0864cb515 100644 --- a/drivers/gpu/drm/panfrost/Makefile +++ b/drivers/gpu/drm/panfrost/Makefile @@ -7,6 +7,7 @@ panfrost-y := \ panfrost_gem.o \ panfrost_gpu.o \ panfrost_job.o \ - panfrost_mmu.o + panfrost_mmu.o \ + panfrost_perfcnt.o obj-$(CONFIG_DRM_PANFROST) += panfrost.o diff --git a/drivers/gpu/drm/panfrost/panfrost_device.c b/drivers/gpu/drm/panfrost/panfrost_device.c index ccb8eb2a518c..8a111d7c0200 100644 --- a/drivers/gpu/drm/panfrost/panfrost_device.c +++ b/drivers/gpu/drm/panfrost/panfrost_device.c @@ -14,6 +14,7 @@ #include "panfrost_gpu.h" #include "panfrost_job.h" #include "panfrost_mmu.h" +#include "panfrost_perfcnt.h" static int panfrost_reset_init(struct panfrost_device *pfdev) { @@ -171,7 +172,13 @@ int panfrost_device_init(struct panfrost_device *pfdev) pm_runtime_mark_last_busy(pfdev->dev); pm_runtime_put_autosuspend(pfdev->dev); + err = panfrost_perfcnt_init(pfdev); + if (err) + goto err_out5; + return 0; +err_out5: + panfrost_job_fini(pfdev); err_out4: panfrost_mmu_fini(pfdev); err_out3: @@ -187,6 +194,7 @@ err_out0: void panfrost_device_fini(struct panfrost_device *pfdev) { + panfrost_perfcnt_fini(pfdev); panfrost_job_fini(pfdev); panfrost_mmu_fini(pfdev); panfrost_gpu_fini(pfdev); diff --git a/drivers/gpu/drm/panfrost/panfrost_device.h b/drivers/gpu/drm/panfrost/panfrost_device.h index e86581c4af7b..83cc01cafde1 100644 --- a/drivers/gpu/drm/panfrost/panfrost_device.h +++ b/drivers/gpu/drm/panfrost/panfrost_device.h @@ -14,6 +14,7 @@ struct panfrost_device; struct panfrost_mmu; struct panfrost_job_slot; struct panfrost_job; +struct panfrost_perfcnt; #define NUM_JOB_SLOTS 3 @@ -78,6 +79,8 @@ struct panfrost_device { struct panfrost_job *jobs[NUM_JOB_SLOTS]; struct list_head scheduled_jobs; + struct panfrost_perfcnt *perfcnt; + struct mutex sched_lock; struct mutex reset_lock; diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c index 754881ece8d7..e34e86a7378a 100644 --- a/drivers/gpu/drm/panfrost/panfrost_drv.c +++ b/drivers/gpu/drm/panfrost/panfrost_drv.c @@ -19,6 +19,7 @@ #include "panfrost_mmu.h" #include "panfrost_job.h" #include "panfrost_gpu.h" +#include "panfrost_perfcnt.h" static bool unstable_ioctls; module_param_unsafe(unstable_ioctls, bool, 0600); @@ -329,6 +330,7 @@ panfrost_postclose(struct drm_device *dev, struct drm_file *file) { struct panfrost_file_priv *panfrost_priv = file->driver_priv; + panfrost_perfcnt_close(panfrost_priv); panfrost_job_close(panfrost_priv); kfree(panfrost_priv); @@ -348,6 +350,8 @@ static const struct drm_ioctl_desc panfrost_drm_driver_ioctls[] = { PANFROST_IOCTL(MMAP_BO, mmap_bo, DRM_RENDER_ALLOW), PANFROST_IOCTL(GET_PARAM, get_param, DRM_RENDER_ALLOW), PANFROST_IOCTL(GET_BO_OFFSET, get_bo_offset, DRM_RENDER_ALLOW), + PANFROST_IOCTL(PERFCNT_ENABLE, perfcnt_enable, DRM_RENDER_ALLOW), + PANFROST_IOCTL(PERFCNT_DUMP, perfcnt_dump, DRM_RENDER_ALLOW), }; DEFINE_DRM_GEM_SHMEM_FOPS(panfrost_drm_driver_fops); diff --git a/drivers/gpu/drm/panfrost/panfrost_gpu.c b/drivers/gpu/drm/panfrost/panfrost_gpu.c index 6e68a100291c..20ab333fc925 100644 --- a/drivers/gpu/drm/panfrost/panfrost_gpu.c +++ b/drivers/gpu/drm/panfrost/panfrost_gpu.c @@ -15,6 +15,7 @@ #include "panfrost_features.h" #include "panfrost_issues.h" #include "panfrost_gpu.h" +#include "panfrost_perfcnt.h" #include "panfrost_regs.h" static irqreturn_t panfrost_gpu_irq_handler(int irq, void *data) @@ -40,6 +41,12 @@ static irqreturn_t panfrost_gpu_irq_handler(int irq, void *data) gpu_write(pfdev, GPU_INT_MASK, 0); } + if (state & GPU_IRQ_PERFCNT_SAMPLE_COMPLETED) + panfrost_perfcnt_sample_done(pfdev); + + if (state & GPU_IRQ_CLEAN_CACHES_COMPLETED) + panfrost_perfcnt_clean_cache_done(pfdev); + gpu_write(pfdev, GPU_INT_CLEAR, state); return IRQ_HANDLED; diff --git a/drivers/gpu/drm/panfrost/panfrost_perfcnt.c b/drivers/gpu/drm/panfrost/panfrost_perfcnt.c new file mode 100644 index 000000000000..83c57d325ca8 --- /dev/null +++ b/drivers/gpu/drm/panfrost/panfrost_perfcnt.c @@ -0,0 +1,329 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright 2019 Collabora Ltd */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include "panfrost_device.h" +#include "panfrost_features.h" +#include "panfrost_gem.h" +#include "panfrost_issues.h" +#include "panfrost_job.h" +#include "panfrost_mmu.h" +#include "panfrost_regs.h" + +#define COUNTERS_PER_BLOCK 64 +#define BYTES_PER_COUNTER 4 +#define BLOCKS_PER_COREGROUP 8 +#define V4_SHADERS_PER_COREGROUP 4 + +struct panfrost_perfcnt { + struct panfrost_gem_object *bo; + size_t bosize; + void *buf; + struct panfrost_file_priv *user; + struct mutex lock; + struct completion dump_comp; +}; + +void panfrost_perfcnt_clean_cache_done(struct panfrost_device *pfdev) +{ + complete(&pfdev->perfcnt->dump_comp); +} + +void panfrost_perfcnt_sample_done(struct panfrost_device *pfdev) +{ + gpu_write(pfdev, GPU_CMD, GPU_CMD_CLEAN_CACHES); +} + +static int panfrost_perfcnt_dump_locked(struct panfrost_device *pfdev) +{ + u64 gpuva; + int ret; + + reinit_completion(&pfdev->perfcnt->dump_comp); + gpuva = pfdev->perfcnt->bo->node.start << PAGE_SHIFT; + gpu_write(pfdev, GPU_PERFCNT_BASE_LO, gpuva); + gpu_write(pfdev, GPU_PERFCNT_BASE_HI, gpuva >> 32); + gpu_write(pfdev, GPU_INT_CLEAR, + GPU_IRQ_CLEAN_CACHES_COMPLETED | + GPU_IRQ_PERFCNT_SAMPLE_COMPLETED); + gpu_write(pfdev, GPU_CMD, GPU_CMD_PERFCNT_SAMPLE); + ret = wait_for_completion_interruptible_timeout(&pfdev->perfcnt->dump_comp, + msecs_to_jiffies(1000)); + if (!ret) + ret = -ETIMEDOUT; + else if (ret > 0) + ret = 0; + + return ret; +} + +static int panfrost_perfcnt_enable_locked(struct panfrost_device *pfdev, + struct panfrost_file_priv *user, + unsigned int counterset) +{ + struct panfrost_perfcnt *perfcnt = pfdev->perfcnt; + struct drm_gem_shmem_object *bo; + u32 cfg; + int ret; + + if (user == perfcnt->user) + return 0; + else if (perfcnt->user) + return -EBUSY; + + ret = pm_runtime_get_sync(pfdev->dev); + if (ret < 0) + return ret; + + bo = drm_gem_shmem_create(pfdev->ddev, perfcnt->bosize); + if (IS_ERR(bo)) + return PTR_ERR(bo); + + perfcnt->bo = to_panfrost_bo(&bo->base); + + /* Map the perfcnt buf in the address space attached to file_priv. */ + ret = panfrost_mmu_map(perfcnt->bo); + if (ret) + goto err_put_bo; + + perfcnt->buf = drm_gem_shmem_vmap(&bo->base); + if (IS_ERR(perfcnt->buf)) { + ret = PTR_ERR(perfcnt->buf); + goto err_put_bo; + } + + /* + * Invalidate the cache and clear the counters to start from a fresh + * state. + */ + reinit_completion(&pfdev->perfcnt->dump_comp); + gpu_write(pfdev, GPU_INT_CLEAR, + GPU_IRQ_CLEAN_CACHES_COMPLETED | + GPU_IRQ_PERFCNT_SAMPLE_COMPLETED); + gpu_write(pfdev, GPU_CMD, GPU_CMD_PERFCNT_CLEAR); + gpu_write(pfdev, GPU_CMD, GPU_CMD_CLEAN_INV_CACHES); + ret = wait_for_completion_timeout(&pfdev->perfcnt->dump_comp, + msecs_to_jiffies(1000)); + if (!ret) { + ret = -ETIMEDOUT; + goto err_vunmap; + } + + perfcnt->user = user; + + /* + * Always use address space 0 for now. + * FIXME: this needs to be updated when we start using different + * address space. + */ + cfg = GPU_PERFCNT_CFG_AS(0) | + GPU_PERFCNT_CFG_MODE(GPU_PERFCNT_CFG_MODE_MANUAL); + + /* + * Bifrost GPUs have 2 set of counters, but we're only interested by + * the first one for now. + */ + if (panfrost_model_is_bifrost(pfdev)) + cfg |= GPU_PERFCNT_CFG_SETSEL(counterset); + + gpu_write(pfdev, GPU_PRFCNT_JM_EN, 0xffffffff); + gpu_write(pfdev, GPU_PRFCNT_SHADER_EN, 0xffffffff); + gpu_write(pfdev, GPU_PRFCNT_MMU_L2_EN, 0xffffffff); + + /* + * Due to PRLAM-8186 we need to disable the Tiler before we enable HW + * counters. + */ + if (panfrost_has_hw_issue(pfdev, HW_ISSUE_8186)) + gpu_write(pfdev, GPU_PRFCNT_TILER_EN, 0); + else + gpu_write(pfdev, GPU_PRFCNT_TILER_EN, 0xffffffff); + + gpu_write(pfdev, GPU_PERFCNT_CFG, cfg); + + if (panfrost_has_hw_issue(pfdev, HW_ISSUE_8186)) + gpu_write(pfdev, GPU_PRFCNT_TILER_EN, 0xffffffff); + + return 0; + +err_vunmap: + drm_gem_shmem_vunmap(&perfcnt->bo->base.base, perfcnt->buf); +err_put_bo: + drm_gem_object_put_unlocked(&bo->base); + return ret; +} + +static int panfrost_perfcnt_disable_locked(struct panfrost_device *pfdev, + struct panfrost_file_priv *user) +{ + struct panfrost_perfcnt *perfcnt = pfdev->perfcnt; + + if (user != perfcnt->user) + return -EINVAL; + + gpu_write(pfdev, GPU_PRFCNT_JM_EN, 0x0); + gpu_write(pfdev, GPU_PRFCNT_SHADER_EN, 0x0); + gpu_write(pfdev, GPU_PRFCNT_MMU_L2_EN, 0x0); + gpu_write(pfdev, GPU_PRFCNT_TILER_EN, 0); + gpu_write(pfdev, GPU_PERFCNT_CFG, + GPU_PERFCNT_CFG_MODE(GPU_PERFCNT_CFG_MODE_OFF)); + + perfcnt->user = NULL; + drm_gem_shmem_vunmap(&perfcnt->bo->base.base, perfcnt->buf); + perfcnt->buf = NULL; + drm_gem_object_put_unlocked(&perfcnt->bo->base.base); + perfcnt->bo = NULL; + pm_runtime_mark_last_busy(pfdev->dev); + pm_runtime_put_autosuspend(pfdev->dev); + + return 0; +} + +int panfrost_ioctl_perfcnt_enable(struct drm_device *dev, void *data, + struct drm_file *file_priv) +{ + struct panfrost_file_priv *pfile = file_priv->driver_priv; + struct panfrost_device *pfdev = dev->dev_private; + struct panfrost_perfcnt *perfcnt = pfdev->perfcnt; + struct drm_panfrost_perfcnt_enable *req = data; + int ret; + + ret = panfrost_unstable_ioctl_check(); + if (ret) + return ret; + + /* Only Bifrost GPUs have 2 set of counters. */ + if (req->counterset > (panfrost_model_is_bifrost(pfdev) ? 1 : 0)) + return -EINVAL; + + mutex_lock(&perfcnt->lock); + if (req->enable) + ret = panfrost_perfcnt_enable_locked(pfdev, pfile, + req->counterset); + else + ret = panfrost_perfcnt_disable_locked(pfdev, pfile); + mutex_unlock(&perfcnt->lock); + + return ret; +} + +int panfrost_ioctl_perfcnt_dump(struct drm_device *dev, void *data, + struct drm_file *file_priv) +{ + struct panfrost_device *pfdev = dev->dev_private; + struct panfrost_perfcnt *perfcnt = pfdev->perfcnt; + struct drm_panfrost_perfcnt_dump *req = data; + void __user *user_ptr = (void __user *)(uintptr_t)req->buf_ptr; + int ret; + + ret = panfrost_unstable_ioctl_check(); + if (ret) + return ret; + + mutex_lock(&perfcnt->lock); + if (perfcnt->user != file_priv->driver_priv) { + ret = -EINVAL; + goto out; + } + + ret = panfrost_perfcnt_dump_locked(pfdev); + if (ret) + goto out; + + if (copy_to_user(user_ptr, perfcnt->buf, perfcnt->bosize)) + ret = -EFAULT; + +out: + mutex_unlock(&perfcnt->lock); + + return ret; +} + +void panfrost_perfcnt_close(struct panfrost_file_priv *pfile) +{ + struct panfrost_device *pfdev = pfile->pfdev; + struct panfrost_perfcnt *perfcnt = pfdev->perfcnt; + + pm_runtime_get_sync(pfdev->dev); + mutex_lock(&perfcnt->lock); + if (perfcnt->user == pfile) + panfrost_perfcnt_disable_locked(pfdev, pfile); + mutex_unlock(&perfcnt->lock); + pm_runtime_mark_last_busy(pfdev->dev); + pm_runtime_put_autosuspend(pfdev->dev); +} + +int panfrost_perfcnt_init(struct panfrost_device *pfdev) +{ + struct panfrost_perfcnt *perfcnt; + size_t size; + + if (panfrost_has_hw_feature(pfdev, HW_FEATURE_V4)) { + unsigned int ncoregroups; + + ncoregroups = hweight64(pfdev->features.l2_present); + size = ncoregroups * BLOCKS_PER_COREGROUP * + COUNTERS_PER_BLOCK * BYTES_PER_COUNTER; + } else { + unsigned int nl2c, ncores; + + /* + * TODO: define a macro to extract the number of l2 caches from + * mem_features. + */ + nl2c = ((pfdev->features.mem_features >> 8) & GENMASK(3, 0)) + 1; + + /* + * shader_present might be sparse, but the counters layout + * forces to dump unused regions too, hence the fls64() call + * instead of hweight64(). + */ + ncores = fls64(pfdev->features.shader_present); + + /* + * There's always one JM and one Tiler block, hence the '+ 2' + * here. + */ + size = (nl2c + ncores + 2) * + COUNTERS_PER_BLOCK * BYTES_PER_COUNTER; + } + + perfcnt = devm_kzalloc(pfdev->dev, sizeof(*perfcnt), GFP_KERNEL); + if (!perfcnt) + return -ENOMEM; + + perfcnt->bosize = size; + + /* Start with everything disabled. */ + gpu_write(pfdev, GPU_PERFCNT_CFG, + GPU_PERFCNT_CFG_MODE(GPU_PERFCNT_CFG_MODE_OFF)); + gpu_write(pfdev, GPU_PRFCNT_JM_EN, 0); + gpu_write(pfdev, GPU_PRFCNT_SHADER_EN, 0); + gpu_write(pfdev, GPU_PRFCNT_MMU_L2_EN, 0); + gpu_write(pfdev, GPU_PRFCNT_TILER_EN, 0); + + init_completion(&perfcnt->dump_comp); + mutex_init(&perfcnt->lock); + pfdev->perfcnt = perfcnt; + + return 0; +} + +void panfrost_perfcnt_fini(struct panfrost_device *pfdev) +{ + /* Disable everything before leaving. */ + gpu_write(pfdev, GPU_PERFCNT_CFG, + GPU_PERFCNT_CFG_MODE(GPU_PERFCNT_CFG_MODE_OFF)); + gpu_write(pfdev, GPU_PRFCNT_JM_EN, 0); + gpu_write(pfdev, GPU_PRFCNT_SHADER_EN, 0); + gpu_write(pfdev, GPU_PRFCNT_MMU_L2_EN, 0); + gpu_write(pfdev, GPU_PRFCNT_TILER_EN, 0); +} diff --git a/drivers/gpu/drm/panfrost/panfrost_perfcnt.h b/drivers/gpu/drm/panfrost/panfrost_perfcnt.h new file mode 100644 index 000000000000..13b8fdaa1b43 --- /dev/null +++ b/drivers/gpu/drm/panfrost/panfrost_perfcnt.h @@ -0,0 +1,18 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright 2019 Collabora Ltd */ +#ifndef __PANFROST_PERFCNT_H__ +#define __PANFROST_PERFCNT_H__ + +#include "panfrost_device.h" + +void panfrost_perfcnt_sample_done(struct panfrost_device *pfdev); +void panfrost_perfcnt_clean_cache_done(struct panfrost_device *pfdev); +int panfrost_perfcnt_init(struct panfrost_device *pfdev); +void panfrost_perfcnt_fini(struct panfrost_device *pfdev); +void panfrost_perfcnt_close(struct panfrost_file_priv *pfile); +int panfrost_ioctl_perfcnt_enable(struct drm_device *dev, void *data, + struct drm_file *file_priv); +int panfrost_ioctl_perfcnt_dump(struct drm_device *dev, void *data, + struct drm_file *file_priv); + +#endif diff --git a/drivers/gpu/drm/panfrost/panfrost_regs.h b/drivers/gpu/drm/panfrost/panfrost_regs.h index 42d08860fd76..ea38ac60581c 100644 --- a/drivers/gpu/drm/panfrost/panfrost_regs.h +++ b/drivers/gpu/drm/panfrost/panfrost_regs.h @@ -44,12 +44,31 @@ GPU_IRQ_MULTIPLE_FAULT) #define GPU_CMD 0x30 #define GPU_CMD_SOFT_RESET 0x01 +#define GPU_CMD_PERFCNT_CLEAR 0x03 +#define GPU_CMD_PERFCNT_SAMPLE 0x04 +#define GPU_CMD_CLEAN_CACHES 0x07 +#define GPU_CMD_CLEAN_INV_CACHES 0x08 #define GPU_STATUS 0x34 +#define GPU_STATUS_PRFCNT_ACTIVE BIT(2) #define GPU_LATEST_FLUSH_ID 0x38 #define GPU_FAULT_STATUS 0x3C #define GPU_FAULT_ADDRESS_LO 0x40 #define GPU_FAULT_ADDRESS_HI 0x44 +#define GPU_PERFCNT_BASE_LO 0x60 +#define GPU_PERFCNT_BASE_HI 0x64 +#define GPU_PERFCNT_CFG 0x68 +#define GPU_PERFCNT_CFG_MODE(x) (x) +#define GPU_PERFCNT_CFG_MODE_OFF 0 +#define GPU_PERFCNT_CFG_MODE_MANUAL 1 +#define GPU_PERFCNT_CFG_MODE_TILE 2 +#define GPU_PERFCNT_CFG_AS(x) ((x) << 4) +#define GPU_PERFCNT_CFG_SETSEL(x) ((x) << 8) +#define GPU_PRFCNT_JM_EN 0x6c +#define GPU_PRFCNT_SHADER_EN 0x70 +#define GPU_PRFCNT_TILER_EN 0x74 +#define GPU_PRFCNT_MMU_L2_EN 0x7c + #define GPU_THREAD_MAX_THREADS 0x0A0 /* (RO) Maximum number of threads per core */ #define GPU_THREAD_MAX_WORKGROUP_SIZE 0x0A4 /* (RO) Maximum workgroup size */ #define GPU_THREAD_MAX_BARRIER_SIZE 0x0A8 /* (RO) Maximum threads waiting at a barrier */ diff --git a/include/uapi/drm/panfrost_drm.h b/include/uapi/drm/panfrost_drm.h index a52e0283b90d..b5d370638846 100644 --- a/include/uapi/drm/panfrost_drm.h +++ b/include/uapi/drm/panfrost_drm.h @@ -18,6 +18,8 @@ extern "C" { #define DRM_PANFROST_MMAP_BO 0x03 #define DRM_PANFROST_GET_PARAM 0x04 #define DRM_PANFROST_GET_BO_OFFSET 0x05 +#define DRM_PANFROST_PERFCNT_ENABLE 0x06 +#define DRM_PANFROST_PERFCNT_DUMP 0x07 #define DRM_IOCTL_PANFROST_SUBMIT DRM_IOW(DRM_COMMAND_BASE + DRM_PANFROST_SUBMIT, struct drm_panfrost_submit) #define DRM_IOCTL_PANFROST_WAIT_BO DRM_IOW(DRM_COMMAND_BASE + DRM_PANFROST_WAIT_BO, struct drm_panfrost_wait_bo) @@ -26,6 +28,15 @@ extern "C" { #define DRM_IOCTL_PANFROST_GET_PARAM DRM_IOWR(DRM_COMMAND_BASE + DRM_PANFROST_GET_PARAM, struct drm_panfrost_get_param) #define DRM_IOCTL_PANFROST_GET_BO_OFFSET DRM_IOWR(DRM_COMMAND_BASE + DRM_PANFROST_GET_BO_OFFSET, struct drm_panfrost_get_bo_offset) +/* + * Unstable ioctl(s): only exposed when the unsafe unstable_ioctls module + * param is set to true. + * All these ioctl(s) are subject to deprecation, so please don't rely on + * them for anything but debugging purpose. + */ +#define DRM_IOCTL_PANFROST_PERFCNT_ENABLE DRM_IOW(DRM_COMMAND_BASE + DRM_PANFROST_PERFCNT_ENABLE, struct drm_panfrost_perfcnt_enable) +#define DRM_IOCTL_PANFROST_PERFCNT_DUMP DRM_IOW(DRM_COMMAND_BASE + DRM_PANFROST_PERFCNT_DUMP, struct drm_panfrost_perfcnt_dump) + #define PANFROST_JD_REQ_FS (1 << 0) /** * struct drm_panfrost_submit - ioctl argument for submitting commands to the 3D @@ -135,6 +146,19 @@ struct drm_panfrost_get_bo_offset { __u64 offset; }; +struct drm_panfrost_perfcnt_enable { + __u32 enable; + /* + * On bifrost we have 2 sets of counters, this parameter defines the + * one to track. + */ + __u32 counterset; +}; + +struct drm_panfrost_perfcnt_dump { + __u64 buf_ptr; +}; + #if defined(__cplusplus) } #endif -- cgit v1.2.3