On 11/07, Stanimir Varbanov wrote:
> diff --git a/drivers/media/platform/qcom/venus/core.c b/drivers/media/platform/qcom/venus/core.c
> new file mode 100644
> index 000000000000..7b14b1f12e20
> --- /dev/null
> +++ b/drivers/media/platform/qcom/venus/core.c
> @@ -0,0 +1,557 @@
> +/*
> + * Copyright (c) 2012-2015, The Linux Foundation. All rights reserved.
> + * Copyright (C) 2016 Linaro Ltd.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 and
> + * only version 2 as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + */
> +#include <linux/clk.h>
> +#include <linux/init.h>
> +#include <linux/ioctl.h>
> +#include <linux/list.h>
> +#include <linux/module.h>
> +#include <linux/of_device.h>
> +#include <linux/platform_device.h>
> +#include <linux/slab.h>
> +#include <linux/types.h>
> +#include <linux/remoteproc.h>
> +#include <linux/pm_runtime.h>
> +#include <media/videobuf2-v4l2.h>
> +#include <media/v4l2-ioctl.h>
> +
> +#include "core.h"
> +#include "vdec.h"
> +#include "venc.h"
> +
> +struct venus_sys_error {
> + struct venus_core *core;
> + struct delayed_work work;
> +};
> +
> +static void venus_sys_error_handler(struct work_struct *work)
> +{
> + struct venus_sys_error *handler =
> + container_of(work, struct venus_sys_error, work.work);
Perhaps to_delayed_work(work) would be better?
> + struct venus_core *core = handler->core;
> + struct device *dev = core->dev;
> + int ret;
> +
> + mutex_lock(&core->lock);
> + if (core->state != CORE_INVALID)
Is this ever possible? Couldn't we cancel the delayed work
instead?
> + goto exit;
> +
> + mutex_unlock(&core->lock);
> +
> + ret = hfi_core_deinit(core);
> + if (ret)
> + dev_err(dev, "core: deinit failed (%d)\n", ret);
> +
> + mutex_lock(&core->lock);
> +
> + rproc_report_crash(core->rproc, RPROC_FATAL_ERROR);
> +
> + rproc_shutdown(core->rproc);
> +
> + ret = rproc_boot(core->rproc);
> + if (ret)
> + goto exit;
> +
> + core->state = CORE_INIT;
> +
> +exit:
> + mutex_unlock(&core->lock);
> + kfree(handler);
> +}
> +
> +static int venus_event_notify(struct venus_core *core, u32 event)
> +{
> + struct venus_sys_error *handler;
> + struct venus_inst *inst;
> +
> + switch (event) {
> + case EVT_SYS_WATCHDOG_TIMEOUT:
> + case EVT_SYS_ERROR:
> + break;
> + default:
> + return -EINVAL;
> + }
> +
> + mutex_lock(&core->lock);
> +
> + core->state = CORE_INVALID;
> +
> + list_for_each_entry(inst, &core->instances, list) {
> + mutex_lock(&inst->lock);
> + inst->state = INST_INVALID;
> + mutex_unlock(&inst->lock);
> + }
> +
> + mutex_unlock(&core->lock);
> +
> + handler = kzalloc(sizeof(*handler), GFP_KERNEL);
> + if (!handler)
> + return -ENOMEM;
> +
> + handler->core = core;
> + INIT_DELAYED_WORK(&handler->work, venus_sys_error_handler);
> +
> + /*
> + * Sleep for 5 sec to ensure venus has completed any
> + * pending cache operations. Without this sleep, we see
> + * device reset when firmware is unloaded after a sys
> + * error.
> + */
> + schedule_delayed_work(&handler->work, msecs_to_jiffies(5000));
Is there a reason we just don't msleep() here instead? Does this
get called from an interrupt handler or something where we can't
sleep? A comment in the code with the answer here would be
helpful.
> +
> + return 0;
> +}
> +
> +static const struct hfi_core_ops venus_core_ops = {
> + .event_notify = venus_event_notify,
> +};
> +
> +static int venus_open(struct file *file)
> +{
> + struct video_device *vdev = video_devdata(file);
> + struct venus_core *core = video_drvdata(file);
> + struct venus_inst *inst;
> + int ret;
> +
> + inst = kzalloc(sizeof(*inst), GFP_KERNEL);
> + if (!inst)
> + return -ENOMEM;
> +
> + INIT_LIST_HEAD(&inst->registeredbufs);
> + mutex_init(&inst->registeredbufs_lock);
> +
> + INIT_LIST_HEAD(&inst->internalbufs);
> + mutex_init(&inst->internalbufs_lock);
> +
> + INIT_LIST_HEAD(&inst->bufqueue);
> + mutex_init(&inst->bufqueue_lock);
> +
> + INIT_LIST_HEAD(&inst->list);
> + mutex_init(&inst->lock);
> +
> + inst->core = core;
> +
> + if (vdev == core->vdev_dec) {
> + inst->session_type = VIDC_SESSION_TYPE_DEC;
> + ret = vdec_open(inst);
> + if (ret)
> + goto err_free_inst;
> + v4l2_fh_init(&inst->fh, core->vdev_dec);
> + } else {
> + inst->session_type = VIDC_SESSION_TYPE_ENC;
> + ret = venc_open(inst);
> + if (ret)
> + goto err_free_inst;
> + v4l2_fh_init(&inst->fh, core->vdev_enc);
> + }
> +
> + inst->fh.ctrl_handler = &inst->ctrl_handler;
> + v4l2_fh_add(&inst->fh);
> + file->private_data = &inst->fh;
> +
> + return 0;
> +
> +err_free_inst:
> + kfree(inst);
> + return ret;
> +}
> +
> +const struct v4l2_file_operations venus_fops = {
static?
> + .owner = THIS_MODULE,
> + .open = venus_open,
> + .release = venus_close,
> + .unlocked_ioctl = video_ioctl2,
> + .poll = venus_poll,
> + .mmap = venus_mmap,
> +#ifdef CONFIG_COMPAT
> + .compat_ioctl32 = v4l2_compat_ioctl32,
> +#endif
> +};
> +
> +static irqreturn_t venus_isr_thread(int irq, void *dev_id)
s/dev_id/core/
> +{
> + struct venus_core *core = dev_id;
> +
> + return hfi_isr_thread(core);
And replace with hfi_isr_thread(core)?
Or even just pass int irq to hfi_isr_thread and not have this
simple wrapper.
> +}
> +
> +static irqreturn_t venus_isr(int irq, void *dev)
> +{
> + struct venus_core *core = dev;
> +
> + return hfi_isr(core);
Same story here.
> +}
[..]
> +
> +static int venus_probe(struct platform_device *pdev)
> +{
> + struct device *dev = &pdev->dev;
> + struct venus_core *core;
> + struct device_node *rproc;
> + struct resource *r;
> + int ret;
> +
> + core = devm_kzalloc(dev, sizeof(*core), GFP_KERNEL);
> + if (!core)
> + return -ENOMEM;
> +
> + core->dev = dev;
> + platform_set_drvdata(pdev, core);
> +
> + rproc = of_parse_phandle(dev->of_node, "rproc", 0);
> + if (IS_ERR(rproc))
> + return PTR_ERR(rproc);
> +
> + core->rproc = rproc_get_by_phandle(rproc->phandle);
> + if (IS_ERR(core->rproc))
> + return PTR_ERR(core->rproc);
> + else if (!core->rproc)
Could drop the else here.
> + return -EPROBE_DEFER;
> +
> + r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "venus");
> + core->base = devm_ioremap_resource(dev, r);
> + if (IS_ERR(core->base))
> + return PTR_ERR(core->base);
> +
> + core->irq = platform_get_irq_byname(pdev, "venus");
> diff --git a/drivers/media/platform/qcom/venus/core.h b/drivers/media/platform/qcom/venus/core.h
> new file mode 100644
> index 000000000000..21ed053aeb17
> --- /dev/null
> +++ b/drivers/media/platform/qcom/venus/core.h
> @@ -0,0 +1,261 @@
> +/*
> + * Copyright (c) 2012-2015, The Linux Foundation. All rights reserved.
> + * Copyright (C) 2016 Linaro Ltd.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 and
> + * only version 2 as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + */
> +
> +#ifndef __VIDC_CORE_H_
> +#define __VIDC_CORE_H_
Maybe these macros should change from VIDC to VENUS?
> +
> +#include <media/v4l2-device.h>
> +#include <media/v4l2-ctrls.h>
> +#include <media/videobuf2-core.h>
> +
> +#include "hfi.h"
> +
> +#define VIDC_CLKS_NUM_MAX 12
> +
> +struct freq_tbl {
> + unsigned int load;
> + unsigned long freq;
> +};
> +
> +struct reg_val {
> + u32 reg;
> + u32 value;
> +};
> +
> +struct venus_resources {
> + u64 dma_mask;
> + const struct freq_tbl *freq_tbl;
> + unsigned int freq_tbl_size;
> + const struct reg_val *reg_tbl;
> + unsigned int reg_tbl_size;
> + const char * const clks[VIDC_CLKS_NUM_MAX];
> + unsigned int clks_num;
> + enum hfi_version hfi_version;
> + u32 max_load;
> + unsigned int vmem_id;
> + u32 vmem_size;
> + u32 vmem_addr;
> +};
> +
> +struct venus_format {
> + u32 pixfmt;
> + int num_planes;
> + u32 type;
> +};
> +
> +struct venus_core {
> + void __iomem *base;
> + int irq;
Is this ever used?
> + struct clk *clks[VIDC_CLKS_NUM_MAX];
> + struct video_device *vdev_dec;
> + struct video_device *vdev_enc;
> + struct v4l2_device v4l2_dev;
> + const struct venus_resources *res;
> + struct rproc *rproc;
> + struct device *dev;
> + struct mutex lock;
> + struct list_head instances;
> +
> + /* HFI core fields */
> + unsigned int state;
> + struct completion done;
> + unsigned int error;
> +
> + /* core operations passed by outside world */
> + const struct hfi_core_ops *core_ops;
> +
> + /* filled by sys core init */
> + u32 enc_codecs;
> + u32 dec_codecs;
> + unsigned int max_sessions_supported;
> +
> + /* core capabilities */
> +#define ENC_ROTATION_CAPABILITY 0x1
> +#define ENC_SCALING_CAPABILITY 0x2
> +#define ENC_DEINTERLACE_CAPABILITY 0x4
> +#define DEC_MULTI_STREAM_CAPABILITY 0x8
> + unsigned int core_caps;
> +
> + /* internal hfi operations */
> + void *priv;
> + const struct hfi_ops *ops;
> +};
> +
> +struct vdec_controls {
> + u32 post_loop_deb_mode;
> + u32 profile;
> + u32 level;
> +};
> +
> +struct venc_controls {
> + u16 gop_size;
> + u32 idr_period;
> + u32 num_p_frames;
> + u32 num_b_frames;
> + u32 bitrate_mode;
> + u32 bitrate;
> + u32 bitrate_peak;
> +
> + u32 h264_i_period;
> + u32 h264_entropy_mode;
> + u32 h264_i_qp;
> + u32 h264_p_qp;
> + u32 h264_b_qp;
> + u32 h264_min_qp;
> + u32 h264_max_qp;
> + u32 h264_loop_filter_mode;
> + u32 h264_loop_filter_alpha;
> + u32 h264_loop_filter_beta;
> +
> + u32 vp8_min_qp;
> + u32 vp8_max_qp;
> +
> + u32 multi_slice_mode;
> + u32 multi_slice_max_bytes;
> + u32 multi_slice_max_mb;
> +
> + u32 header_mode;
> +
> + u32 profile;
> + u32 level;
> +};
> +
> +struct venus_inst {
Can we have some kernel doc on these structures?
> + struct list_head list;
> + struct mutex lock;
e.g. what is lock protecting? list?
> +
> + struct venus_core *core;
> +
> + struct list_head internalbufs;
> + struct mutex internalbufs_lock;
> +
> + struct list_head registeredbufs;
> + struct mutex registeredbufs_lock;
> +
> + struct list_head bufqueue;
> + struct mutex bufqueue_lock;
> +
> + struct vb2_queue bufq_out;
> + struct vb2_queue bufq_cap;
> +
> + struct v4l2_ctrl_handler ctrl_handler;
> + union {
> + struct vdec_controls dec;
> + struct venc_controls enc;
> + } controls;
> + struct v4l2_fh fh;
> +
> + /* v4l2 fields */
> + u32 width;
> + u32 height;
> + u32 out_width;
> + u32 out_height;
> + u32 colorspace;
> + u8 ycbcr_enc;
> + u8 quantization;
> + u8 xfer_func;
> + u64 fps;
> + struct v4l2_fract timeperframe;
> + const struct venus_format *fmt_out;
> + const struct venus_format *fmt_cap;
> + unsigned int num_input_bufs;
> + unsigned int num_output_bufs;
> + unsigned int output_buf_size;
> + bool in_reconfig;
> + u32 reconfig_width;
> + u32 reconfig_height;
> + u64 sequence;
> + bool codec_cfg;
> +
> + /* HFI instance fields */
> + unsigned int state;
> + struct completion done;
> + unsigned int error;
> +
> + /* instance operations passed by outside world */
> + const struct hfi_inst_ops *ops;
> + void *priv;
> + u32 session_type;
> + union hfi_get_property hprop;
> +
> + /* capabilities filled by session_init */
> + struct hfi_capability cap_width;
> + struct hfi_capability cap_height;
> + struct hfi_capability cap_mbs_per_frame;
> + struct hfi_capability cap_mbs_per_sec;
> + struct hfi_capability cap_framerate;
> + struct hfi_capability cap_scale_x;
> + struct hfi_capability cap_scale_y;
> + struct hfi_capability cap_bitrate;
> + struct hfi_capability cap_hier_p;
> + struct hfi_capability cap_ltr_count;
> + struct hfi_capability cap_secure_output2_threshold;
> + bool cap_bufs_mode_static;
> + bool cap_bufs_mode_dynamic;
> +
> + /* profile & level pairs supported */
> + unsigned int pl_count;
> + struct hfi_profile_level pl[HFI_MAX_PROFILE_COUNT];
> +
> + /* buffer requirements */
> + struct hfi_buffer_requirements bufreq[HFI_BUFFER_TYPE_MAX];
> +};
> +
> +#define ctrl_to_inst(ctrl) \
> + container_of(ctrl->handler, struct venus_inst, ctrl_handler)
> +
> +struct venus_ctrl {
> + u32 id;
> + enum v4l2_ctrl_type type;
> + s32 min;
> + s32 max;
> + s32 def;
> + u32 step;
> + u64 menu_skip_mask;
> + u32 flags;
> + const char * const *qmenu;
> +};
> diff --git a/drivers/media/platform/qcom/venus/helpers.c b/drivers/media/platform/qcom/venus/helpers.c
> new file mode 100644
> index 000000000000..c2d1446ad254
> --- /dev/null
> +++ b/drivers/media/platform/qcom/venus/helpers.c
> @@ -0,0 +1,612 @@
> +/*
> + * Copyright (c) 2012-2015, The Linux Foundation. All rights reserved.
> + * Copyright (C) 2016 Linaro Ltd.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 and
> + * only version 2 as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + */
> +#include <linux/clk.h>
> +#include <linux/list.h>
> +#include <linux/mutex.h>
> +#include <linux/pm_runtime.h>
> +#include <media/videobuf2-dma-sg.h>
> +
> +#include "helpers.h"
> +#include "hfi_helper.h"
> +
> +struct intbuf {
> + struct list_head list;
> + u32 type;
> + size_t size;
> + void *va;
> + dma_addr_t da;
> + unsigned long attrs;
> +};
> +
> +static int intbufs_set_buffer(struct venus_inst *inst, u32 type)
> +{
> + struct venus_core *core = inst->core;
> + struct device *dev = core->dev;
> + struct hfi_buffer_requirements bufreq;
> + struct hfi_buffer_desc bd;
> + struct intbuf *buf;
> + unsigned int i;
> + int ret;
> +
> + ret = vidc_get_bufreq(inst, type, &bufreq);
> + if (ret)
> + return 0;
> +
> + if (!bufreq.size)
> + return 0;
> +
> + for (i = 0; i < bufreq.count_actual; i++) {
> + buf = kzalloc(sizeof(*buf), GFP_KERNEL);
> + if (!buf) {
> + ret = -ENOMEM;
> + goto fail;
> + }
> +
> + buf->type = bufreq.type;
> + buf->size = bufreq.size;
> + buf->attrs = DMA_ATTR_WRITE_COMBINE |
> + DMA_ATTR_NO_KERNEL_MAPPING;
> + buf->va = dma_alloc_attrs(dev, buf->size, &buf->da, GFP_KERNEL,
> + buf->attrs);
> + if (!buf->va) {
> + ret = -ENOMEM;
> + goto fail;
> + }
> +
> + memset(&bd, 0, sizeof(bd));
> + bd.buffer_size = buf->size;
> + bd.buffer_type = buf->type;
> + bd.num_buffers = 1;
> + bd.device_addr = buf->da;
> +
> + ret = hfi_session_set_buffers(inst, &bd);
> + if (ret) {
> + dev_err(dev, "set session buffers failed\n");
> + goto fail;
> + }
> +
> + mutex_lock(&inst->internalbufs_lock);
> + list_add_tail(&buf->list, &inst->internalbufs);
> + mutex_unlock(&inst->internalbufs_lock);
> + }
> +
> + return 0;
> +
> +fail:
> + kfree(buf);
> + return ret;
> +}
> +
> +static int intbufs_unset_buffers(struct venus_inst *inst)
> +{
> + struct hfi_buffer_desc bd = {0};
> + struct intbuf *buf, *n;
> + int ret = 0;
> +
> + mutex_lock(&inst->internalbufs_lock);
> + list_for_each_entry_safe(buf, n, &inst->internalbufs, list) {
> + bd.buffer_size = buf->size;
> + bd.buffer_type = buf->type;
> + bd.num_buffers = 1;
> + bd.device_addr = buf->da;
> + bd.response_required = true;
> +
> + ret = hfi_session_unset_buffers(inst, &bd);
Should this be ret |= ? Only the last time through the loop will
there be an error. Or perhaps we should be bailing out early from
this loop?
> +
> + list_del(&buf->list);
> + dma_free_attrs(inst->core->dev, buf->size, buf->va, buf->da,
> + buf->attrs);
> + kfree(buf);
> + }
> + mutex_unlock(&inst->internalbufs_lock);
> +
> + return ret;
> +}
> +
> +static const unsigned int intbuf_types[] = {
> + HFI_BUFFER_INTERNAL_SCRATCH,
> + HFI_BUFFER_INTERNAL_SCRATCH_1,
> + HFI_BUFFER_INTERNAL_SCRATCH_2,
> + HFI_BUFFER_INTERNAL_PERSIST,
> + HFI_BUFFER_INTERNAL_PERSIST_1,
> +};
> +
> +static int intbufs_alloc(struct venus_inst *inst)
> +{
> + unsigned int i;
> + int ret;
> +
> + for (i = 0; i < ARRAY_SIZE(intbuf_types); i++) {
> + ret = intbufs_set_buffer(inst, intbuf_types[i]);
> + if (ret)
> + goto error;
> + }
> +
> + return 0;
> +
> +error:
> + intbufs_unset_buffers(inst);
> + return ret;
> +}
> +
> +static int intbufs_free(struct venus_inst *inst)
> +{
> + return intbufs_unset_buffers(inst);
> +}
> +
> +static u32 load_per_instance(struct venus_inst *inst)
> +{
> + u32 w = inst->width;
> + u32 h = inst->height;
> + u32 mbs;
> +
> + if (!inst || !(inst->state >= INST_INIT && inst->state < INST_STOP))
> + return 0;
> +
> + mbs = (ALIGN(w, 16) / 16) * (ALIGN(h, 16) / 16);
> +
> + return mbs * inst->fps;
> +}
> +
> +static u32 load_per_type(struct venus_core *core, u32 session_type)
> +{
> + struct venus_inst *inst = NULL;
> + u32 mbs_per_sec = 0;
> +
> + mutex_lock(&core->lock);
> + list_for_each_entry(inst, &core->instances, list) {
> + if (inst->session_type != session_type)
> + continue;
> +
> + mbs_per_sec += load_per_instance(inst);
> + }
> + mutex_unlock(&core->lock);
> +
> + return mbs_per_sec;
> +}
> +
> +static int load_scale_clocks(struct venus_core *core)
> +{
> + const struct freq_tbl *table = core->res->freq_tbl;
> + unsigned int num_rows = core->res->freq_tbl_size;
> + unsigned long freq = table[0].freq;
> + struct clk *clk = core->clks[0];
> + struct device *dev = core->dev;
> + u32 mbs_per_sec;
> + unsigned int i;
> + int ret;
> +
> + mbs_per_sec = load_per_type(core, VIDC_SESSION_TYPE_ENC) +
> + load_per_type(core, VIDC_SESSION_TYPE_DEC);
> +
> + if (mbs_per_sec > core->res->max_load) {
> + dev_warn(dev, "HW is overloaded, needed: %d max: %d\n",
> + mbs_per_sec, core->res->max_load);
> + return -EBUSY;
> + }
> +
> + if (!mbs_per_sec && num_rows > 1) {
> + freq = table[num_rows - 1].freq;
> + goto set_freq;
> + }
> +
> + for (i = 0; i < num_rows; i++) {
> + if (mbs_per_sec > table[i].load)
> + break;
> + freq = table[i].freq;
> + }
> +
> +set_freq:
> +
> + ret = clk_set_rate(clk, freq);
> + if (ret) {
> + dev_err(dev, "failed to set clock rate %lu (%d)\n", freq, ret);
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +static int session_set_buf(struct vb2_buffer *vb)
> +{
> + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
> + struct vb2_queue *q = vb->vb2_queue;
> + struct venus_inst *inst = vb2_get_drv_priv(q);
> + struct venus_core *core = inst->core;
> + struct device *dev = core->dev;
> + struct vidc_buffer *buf = to_vidc_buffer(vbuf);
> + struct hfi_frame_data fdata;
> + int ret;
> +
> + memset(&fdata, 0, sizeof(fdata));
> +
> + fdata.alloc_len = vb2_plane_size(vb, 0);
> + fdata.device_addr = buf->dma_addr;
> + fdata.timestamp = vb->timestamp;
> + fdata.flags = 0;
> + fdata.clnt_data = buf->dma_addr;
> +
> + if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
> + fdata.buffer_type = HFI_BUFFER_INPUT;
> + fdata.filled_len = vb2_get_plane_payload(vb, 0);
> + fdata.offset = vb->planes[0].data_offset;
> +
> + if (vbuf->flags & V4L2_BUF_FLAG_LAST || !fdata.filled_len)
> + fdata.flags |= HFI_BUFFERFLAG_EOS;
> +
> + if (inst->codec_cfg == false &&
> + inst->session_type == VIDC_SESSION_TYPE_DEC) {
> + inst->codec_cfg = true;
> + fdata.flags |= HFI_BUFFERFLAG_CODECCONFIG;
> + }
> +
> + ret = hfi_session_etb(inst, &fdata);
> + } else if (q->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
> + fdata.buffer_type = HFI_BUFFER_OUTPUT;
> + fdata.filled_len = 0;
> + fdata.offset = 0;
> +
> + ret = hfi_session_ftb(inst, &fdata);
> + } else {
> + ret = -EINVAL;
> + }
Use a switch statement instead?
> +
> + if (ret) {
> + dev_err(dev, "failed to set session buffer (%d)\n", ret);
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +static int session_unregister_bufs(struct venus_inst *inst)
> +{
> + struct venus_core *core = inst->core;
> + struct device *dev = core->dev;
> + struct hfi_buffer_desc *bd;
> + struct vidc_buffer *buf, *tmp;
> + int ret = 0;
> +
> + if (core->res->hfi_version == HFI_VERSION_3XX)
> + return 0;
> +
> + mutex_lock(&inst->registeredbufs_lock);
> + list_for_each_entry_safe(buf, tmp, &inst->registeredbufs, hfi_list) {
> + list_del(&buf->hfi_list);
> + bd = &buf->bd;
> + bd->response_required = 1;
> + ret = hfi_session_unset_buffers(inst, bd);
> + if (ret) {
> + dev_err(dev, "%s: session release buffers failed\n",
> + __func__);
> + break;
> + }
> + }
> + mutex_unlock(&inst->registeredbufs_lock);
> +
> + return ret;
> +}
> +
> +static int session_register_bufs(struct venus_inst *inst)
> +{
> + struct venus_core *core = inst->core;
> + struct device *dev = core->dev;
> + struct hfi_buffer_desc *bd;
> + struct vidc_buffer *buf, *tmp;
> + int ret = 0;
> +
> + if (core->res->hfi_version == HFI_VERSION_3XX)
> + return 0;
> +
> + mutex_lock(&inst->registeredbufs_lock);
> + list_for_each_entry_safe(buf, tmp, &inst->registeredbufs, hfi_list) {
Do we need to iterate safely? It isn't obvious that the list is
being modified here.
> + bd = &buf->bd;
> + ret = hfi_session_set_buffers(inst, bd);
> + if (ret) {
> + dev_err(dev, "%s: session: set buffer failed\n",
> + __func__);
> + break;
> + }
> + }
> + mutex_unlock(&inst->registeredbufs_lock);
> +
> + return ret;
> +}
> +
> +int vidc_get_bufreq(struct venus_inst *inst, u32 type,
> + struct hfi_buffer_requirements *out)
> +{
> + u32 ptype = HFI_PROPERTY_CONFIG_BUFFER_REQUIREMENTS;
> + union hfi_get_property hprop;
> + int ret, i;
> +
> + if (out)
> + memset(out, 0, sizeof(*out));
> +
> + ret = hfi_session_get_property(inst, ptype, &hprop);
> + if (ret)
> + return ret;
> +
> + ret = -EINVAL;
> +
> + for (i = 0; i < HFI_BUFFER_TYPE_MAX; i++) {
> + if (hprop.bufreq[i].type != type)
> + continue;
> +
> + if (out)
> + memcpy(out, &hprop.bufreq[i], sizeof(*out));
> + ret = 0;
> + break;
> + }
> +
> + return ret;
> +}
> +
> +int vidc_set_color_format(struct venus_inst *inst, u32 type, u32 pixfmt)
> +{
> + struct hfi_uncompressed_format_select fmt;
> + u32 ptype = HFI_PROPERTY_PARAM_UNCOMPRESSED_FORMAT_SELECT;
> + int ret;
> +
> + fmt.buffer_type = type;
> +
> + switch (pixfmt) {
> + case V4L2_PIX_FMT_NV12:
> + fmt.format = HFI_COLOR_FORMAT_NV12;
> + break;
> + case V4L2_PIX_FMT_NV21:
> + fmt.format = HFI_COLOR_FORMAT_NV21;
> + break;
> + default:
> + return -EINVAL;
> + }
> +
> + ret = hfi_session_set_property(inst, ptype, &fmt);
> + if (ret)
> + return ret;
> +
> + return 0;
> +}
> +
> +struct vb2_v4l2_buffer *
> +vidc_vb2_find_buf(struct venus_inst *inst, dma_addr_t addr)
> +{
> + struct vidc_buffer *buf;
> + struct vb2_v4l2_buffer *vb = NULL;
> +
> + mutex_lock(&inst->bufqueue_lock);
> +
> + list_for_each_entry(buf, &inst->bufqueue, list) {
> + if (buf->dma_addr == addr) {
> + vb = &buf->vb;
> + break;
> + }
> + }
> +
> + if (vb)
> + list_del(&buf->list);
> +
> + mutex_unlock(&inst->bufqueue_lock);
> +
> + return vb;
> +}
> +
> +int vidc_vb2_buf_init(struct vb2_buffer *vb)
> +{
> + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
> + struct vb2_queue *q = vb->vb2_queue;
> + struct venus_inst *inst = vb2_get_drv_priv(q);
> + struct vidc_buffer *buf = to_vidc_buffer(vbuf);
> + struct hfi_buffer_desc *bd = &buf->bd;
> + struct sg_table *sgt;
> +
> + memset(bd, 0, sizeof(*bd));
> +
> + if (q->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
> + return 0;
> +
> + sgt = vb2_dma_sg_plane_desc(vb, 0);
> + if (!sgt)
> + return -EINVAL;
> +
> + bd->buffer_size = vb2_plane_size(vb, 0);
> + bd->buffer_type = HFI_BUFFER_OUTPUT;
> + bd->num_buffers = 1;
> + bd->device_addr = sg_dma_address(sgt->sgl);
> +
> + mutex_lock(&inst->registeredbufs_lock);
> + list_add_tail(&buf->hfi_list, &inst->registeredbufs);
> + mutex_unlock(&inst->registeredbufs_lock);
> +
> + return 0;
> +}
> +
> +int vidc_vb2_buf_prepare(struct vb2_buffer *vb)
> +{
> + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
> + struct vidc_buffer *buf = to_vidc_buffer(vbuf);
> + struct sg_table *sgt;
> +
> + sgt = vb2_dma_sg_plane_desc(vb, 0);
> + if (!sgt)
> + return -EINVAL;
> +
> + buf->dma_addr = sg_dma_address(sgt->sgl);
> +
> + return 0;
> +}
> +
> +void vidc_vb2_buf_queue(struct vb2_buffer *vb)
> +{
> + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
> + struct venus_inst *inst = vb2_get_drv_priv(vb->vb2_queue);
> + struct vidc_buffer *buf = to_vidc_buffer(vbuf);
> + unsigned int state;
> + int ret;
> +
> + mutex_lock(&inst->lock);
> + state = inst->state;
> + mutex_unlock(&inst->lock);
> +
So if we context switch here and then venus_event_notify() runs
and marks inst->state as INVALID we won't notice?
> + if (state == INST_INVALID || state >= INST_STOP) {
> + vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
> + return;
> + }
> +
> + mutex_lock(&inst->bufqueue_lock);
> + list_add_tail(&buf->list, &inst->bufqueue);
> + mutex_unlock(&inst->bufqueue_lock);
> +
> + if (!vb2_is_streaming(&inst->bufq_cap) ||
> + !vb2_is_streaming(&inst->bufq_out))
> + return;
> +
> + ret = session_set_buf(vb);
> + if (ret)
> + vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
> +}
> +
> +void vidc_vb2_stop_streaming(struct vb2_queue *q)
> +{
> + struct venus_inst *inst = vb2_get_drv_priv(q);
> + struct venus_core *core = inst->core;
> + struct device *dev = core->dev;
> + struct vb2_queue *other_queue;
> + struct vidc_buffer *buf, *n;
> + enum vb2_buffer_state state;
> + int ret;
> +
> + if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
> + other_queue = &inst->bufq_cap;
> + else
> + other_queue = &inst->bufq_out;
> +
> + if (!vb2_is_streaming(other_queue))
> + return;
> +
> + ret = hfi_session_stop(inst);
> + if (ret) {
> + dev_err(dev, "session: stop failed (%d)\n", ret);
> + goto abort;
> + }
> +
> + ret = hfi_session_unload_res(inst);
> + if (ret) {
> + dev_err(dev, "session: release resources failed (%d)\n", ret);
> + goto abort;
> + }
> +
> + ret = session_unregister_bufs(inst);
> + if (ret) {
> + dev_err(dev, "failed to release capture buffers: %d\n", ret);
> + goto abort;
> + }
> +
> + ret = intbufs_free(inst);
> +
> + if (inst->state == INST_INVALID || core->state == CORE_INVALID)
Here we don't have any lock held for inst->state protection? Is
there some other lock assumed to be held? We should add a
lockdep_assert() at the top of this function if so.
> + ret = -EINVAL;
> +
> +abort:
> + if (ret)
> + hfi_session_abort(inst);
> +
> + load_scale_clocks(core);
> +
> + ret = hfi_session_deinit(inst);
> +
> + pm_runtime_put_sync(dev);
> +
> + mutex_lock(&inst->bufqueue_lock);
> +
> + if (list_empty(&inst->bufqueue)) {
> + mutex_unlock(&inst->bufqueue_lock);
> + return;
Or just let that list_for_each_entry_safe() below iterate over nothing?
> + }
> +
> + if (ret)
> + state = VB2_BUF_STATE_ERROR;
> + else
> + state = VB2_BUF_STATE_DONE;
> +
> + list_for_each_entry_safe(buf, n, &inst->bufqueue, list) {
> + vb2_buffer_done(&buf->vb.vb2_buf, state);
> + list_del(&buf->list);
> + }
> +
> + mutex_unlock(&inst->bufqueue_lock);
> +}
> +
> +int vidc_vb2_start_streaming(struct venus_inst *inst)
> +{
> + struct venus_core *core = inst->core;
> + struct vidc_buffer *buf, *n;
> + int ret;
> +
> + ret = intbufs_alloc(inst);
> + if (ret)
> + return ret;
> +
> + ret = session_register_bufs(inst);
> + if (ret)
> + goto err_bufs_free;
> +
> + load_scale_clocks(core);
> +
> + ret = hfi_session_load_res(inst);
> + if (ret)
> + goto err_unreg_bufs;
> +
> + ret = hfi_session_start(inst);
> + if (ret)
> + goto err_unload_res;
> +
> + mutex_lock(&inst->bufqueue_lock);
> + list_for_each_entry_safe(buf, n, &inst->bufqueue, list) {
> + ret = session_set_buf(&buf->vb.vb2_buf);
> + if (ret)
> + break;
> + }
> + mutex_unlock(&inst->bufqueue_lock);
> +
> + if (ret)
> + goto err_session_stop;
> +
> + return 0;
> +
> +err_session_stop:
> + hfi_session_stop(inst);
> +err_unload_res:
> + hfi_session_unload_res(inst);
> +err_unreg_bufs:
> + session_unregister_bufs(inst);
> +err_bufs_free:
> + intbufs_free(inst);
> +
> + mutex_lock(&inst->bufqueue_lock);
> +
> + if (list_empty(&inst->bufqueue))
> + goto err_done;
Or just iterate over nothing below?
> +
> + list_for_each_entry_safe(buf, n, &inst->bufqueue, list) {
> + vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
> + list_del(&buf->list);
> + }
> +
> +err_done:
> + mutex_unlock(&inst->bufqueue_lock);
> +
> + return ret;
> +}
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