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1882 lines
50 KiB
Diff
1882 lines
50 KiB
Diff
From 2994fdc0a9d48be68d6e403bc8ddadecfc8d8796 Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.org>
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Date: Tue, 25 Sep 2018 10:27:11 +0100
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Subject: [PATCH] staging: vc04_services: Add new vc-sm-cma driver
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This new driver allows contiguous memory blocks to be imported
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into the VideoCore VPU memory map, and manages the lifetime of
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those objects, only releasing the source dmabuf once the VPU has
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confirmed it has finished with it.
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
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---
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drivers/staging/vc04_services/Kconfig | 1 +
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drivers/staging/vc04_services/Makefile | 1 +
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.../staging/vc04_services/vc-sm-cma/Kconfig | 10 +
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.../staging/vc04_services/vc-sm-cma/Makefile | 8 +
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drivers/staging/vc04_services/vc-sm-cma/TODO | 2 +
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.../staging/vc04_services/vc-sm-cma/vc_sm.c | 838 ++++++++++++++++++
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.../staging/vc04_services/vc-sm-cma/vc_sm.h | 59 ++
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.../vc04_services/vc-sm-cma/vc_sm_cma_vchi.c | 498 +++++++++++
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.../vc04_services/vc-sm-cma/vc_sm_cma_vchi.h | 59 ++
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.../vc04_services/vc-sm-cma/vc_sm_defs.h | 298 +++++++
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.../vc04_services/vc-sm-cma/vc_sm_knl.h | 28 +
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11 files changed, 1802 insertions(+)
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create mode 100644 drivers/staging/vc04_services/vc-sm-cma/Kconfig
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create mode 100644 drivers/staging/vc04_services/vc-sm-cma/Makefile
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create mode 100644 drivers/staging/vc04_services/vc-sm-cma/TODO
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create mode 100644 drivers/staging/vc04_services/vc-sm-cma/vc_sm.c
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create mode 100644 drivers/staging/vc04_services/vc-sm-cma/vc_sm.h
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create mode 100644 drivers/staging/vc04_services/vc-sm-cma/vc_sm_cma_vchi.c
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create mode 100644 drivers/staging/vc04_services/vc-sm-cma/vc_sm_cma_vchi.h
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create mode 100644 drivers/staging/vc04_services/vc-sm-cma/vc_sm_defs.h
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create mode 100644 drivers/staging/vc04_services/vc-sm-cma/vc_sm_knl.h
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--- a/drivers/staging/vc04_services/Kconfig
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+++ b/drivers/staging/vc04_services/Kconfig
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@@ -22,6 +22,7 @@ source "drivers/staging/vc04_services/bc
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source "drivers/staging/vc04_services/bcm2835-camera/Kconfig"
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source "drivers/staging/vc04_services/vchiq-mmal/Kconfig"
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+source "drivers/staging/vc04_services/vc-sm-cma/Kconfig"
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endif
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--- a/drivers/staging/vc04_services/Makefile
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+++ b/drivers/staging/vc04_services/Makefile
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@@ -13,6 +13,7 @@ vchiq-objs := \
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obj-$(CONFIG_SND_BCM2835) += bcm2835-audio/
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obj-$(CONFIG_VIDEO_BCM2835) += bcm2835-camera/
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obj-$(CONFIG_BCM2835_VCHIQ_MMAL) += vchiq-mmal/
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+obj-$(CONFIG_BCM_VC_SM_CMA) += vc-sm-cma/
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ccflags-y += -Idrivers/staging/vc04_services -D__VCCOREVER__=0x04000000
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--- /dev/null
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+++ b/drivers/staging/vc04_services/vc-sm-cma/Kconfig
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@@ -0,0 +1,10 @@
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+config BCM_VC_SM_CMA
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+ tristate "VideoCore Shared Memory (CMA) driver"
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+ depends on BCM2835_VCHIQ
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+ select RBTREE
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+ select DMA_SHARED_BUFFER
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+ help
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+ Say Y here to enable the shared memory interface that
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+ supports sharing dmabufs with VideoCore.
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+ This operates over the VCHIQ interface to a service
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+ running on VideoCore.
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--- /dev/null
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+++ b/drivers/staging/vc04_services/vc-sm-cma/Makefile
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@@ -0,0 +1,8 @@
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+ccflags-y += -Idrivers/staging/vc04_services -Idrivers/staging/vc04_services/interface/vchi -Idrivers/staging/vc04_services/interface/vchiq_arm
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+# -I"drivers/staging/android/ion/" -I"$(srctree)/fs/"
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+ccflags-y += -D__VCCOREVER__=0
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+
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+vc-sm-cma-$(CONFIG_BCM_VC_SM_CMA) := \
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+ vc_sm.o vc_sm_cma_vchi.o
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+
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+obj-$(CONFIG_BCM_VC_SM_CMA) += vc-sm-cma.o
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--- /dev/null
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+++ b/drivers/staging/vc04_services/vc-sm-cma/TODO
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@@ -0,0 +1,2 @@
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+1) Convert to a platform driver.
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+
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--- /dev/null
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+++ b/drivers/staging/vc04_services/vc-sm-cma/vc_sm.c
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@@ -0,0 +1,838 @@
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+// SPDX-License-Identifier: GPL-2.0
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+/*
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+ * VideoCore Shared Memory driver using CMA.
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+ *
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+ * Copyright: 2018, Raspberry Pi (Trading) Ltd
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+ * Dave Stevenson <dave.stevenson@raspberrypi.org>
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+ *
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+ * Based on vmcs_sm driver from Broadcom Corporation for some API,
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+ * and taking some code for CMA/dmabuf handling from the Android Ion
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+ * driver (Google/Linaro).
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+ *
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+ * This is cut down version to only support import of dma_bufs from
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+ * other kernel drivers. A more complete implementation of the old
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+ * vmcs_sm functionality can follow later.
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+ *
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+ */
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+
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+/* ---- Include Files ----------------------------------------------------- */
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+#include <linux/cdev.h>
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+#include <linux/device.h>
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+#include <linux/debugfs.h>
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+#include <linux/dma-mapping.h>
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+#include <linux/dma-buf.h>
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+#include <linux/errno.h>
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+#include <linux/fs.h>
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+#include <linux/kernel.h>
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+#include <linux/list.h>
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+#include <linux/miscdevice.h>
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+#include <linux/module.h>
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+#include <linux/mm.h>
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+#include <linux/of_device.h>
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+#include <linux/platform_device.h>
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+#include <linux/proc_fs.h>
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+#include <linux/slab.h>
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+#include <linux/seq_file.h>
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+#include <linux/syscalls.h>
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+#include <linux/types.h>
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+
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+#include "vchiq_connected.h"
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+#include "vc_sm_cma_vchi.h"
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+
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+#include "vc_sm.h"
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+#include "vc_sm_knl.h"
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+
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+/* ---- Private Constants and Types --------------------------------------- */
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+
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+#define DEVICE_NAME "vcsm-cma"
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+#define DEVICE_MINOR 0
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+
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+#define VC_SM_RESOURCE_NAME_DEFAULT "sm-host-resource"
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+
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+#define VC_SM_DIR_ROOT_NAME "vcsm-cma"
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+#define VC_SM_STATE "state"
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+
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+/* Private file data associated with each opened device. */
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+struct vc_sm_privdata_t {
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+ pid_t pid; /* PID of creator. */
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+
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+ int restart_sys; /* Tracks restart on interrupt. */
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+ enum vc_sm_msg_type int_action; /* Interrupted action. */
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+ u32 int_trans_id; /* Interrupted transaction. */
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+};
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+
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+typedef int (*VC_SM_SHOW) (struct seq_file *s, void *v);
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+struct sm_pde_t {
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+ VC_SM_SHOW show; /* Debug fs function hookup. */
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+ struct dentry *dir_entry; /* Debug fs directory entry. */
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+ void *priv_data; /* Private data */
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+};
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+
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+/* Global state information. */
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+struct sm_state_t {
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+ struct platform_device *pdev;
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+
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+ struct miscdevice dev;
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+ struct sm_instance *sm_handle; /* Handle for videocore service. */
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+
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+ struct mutex map_lock; /* Global map lock. */
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+ struct list_head buffer_list; /* List of buffer. */
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+
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+ struct vc_sm_privdata_t *data_knl; /* Kernel internal data tracking. */
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+ struct dentry *dir_root; /* Debug fs entries root. */
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+ struct sm_pde_t dir_state; /* Debug fs entries state sub-tree. */
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+
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+ bool require_released_callback; /* VPU will send a released msg when it
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+ * has finished with a resource.
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+ */
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+ u32 int_trans_id; /* Interrupted transaction. */
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+};
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+
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+/* ---- Private Variables ----------------------------------------------- */
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+
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+static struct sm_state_t *sm_state;
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+static int sm_inited;
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+
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+/* ---- Private Function Prototypes -------------------------------------- */
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+
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+/* ---- Private Functions ------------------------------------------------ */
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+
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+static int vc_sm_cma_seq_file_show(struct seq_file *s, void *v)
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+{
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+ struct sm_pde_t *sm_pde;
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+
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+ sm_pde = (struct sm_pde_t *)(s->private);
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+
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+ if (sm_pde && sm_pde->show)
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+ sm_pde->show(s, v);
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+
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+ return 0;
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+}
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+
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+static int vc_sm_cma_single_open(struct inode *inode, struct file *file)
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+{
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+ return single_open(file, vc_sm_cma_seq_file_show, inode->i_private);
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+}
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+
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+static const struct file_operations vc_sm_cma_debug_fs_fops = {
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+ .open = vc_sm_cma_single_open,
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+ .read = seq_read,
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+ .llseek = seq_lseek,
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+ .release = single_release,
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+};
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+
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+static int vc_sm_cma_global_state_show(struct seq_file *s, void *v)
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+{
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+ struct vc_sm_buffer *resource = NULL;
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+ int resource_count = 0;
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+
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+ if (!sm_state)
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+ return 0;
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+
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+ seq_printf(s, "\nVC-ServiceHandle 0x%x\n",
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+ (unsigned int)sm_state->sm_handle);
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+
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+ /* Log all applicable mapping(s). */
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+
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+ mutex_lock(&sm_state->map_lock);
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+ seq_puts(s, "\nResources\n");
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+ if (!list_empty(&sm_state->buffer_list)) {
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+ list_for_each_entry(resource, &sm_state->buffer_list,
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+ global_buffer_list) {
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+ resource_count++;
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+
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+ seq_printf(s, "\nResource %p\n",
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+ resource);
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+ seq_printf(s, " NAME %s\n",
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+ resource->name);
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+ seq_printf(s, " SIZE %d\n",
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+ resource->size);
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+ seq_printf(s, " DMABUF %p\n",
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+ resource->dma_buf);
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+ seq_printf(s, " ATTACH %p\n",
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+ resource->attach);
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+ seq_printf(s, " SG_TABLE %p\n",
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+ resource->sg_table);
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+ seq_printf(s, " SGT %p\n",
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+ resource->sgt);
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+ seq_printf(s, " DMA_ADDR %pad\n",
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+ &resource->dma_addr);
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+ seq_printf(s, " VC_HANDLE %08x\n",
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+ resource->vc_handle);
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+ seq_printf(s, " VC_MAPPING %d\n",
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+ resource->vpu_state);
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+ }
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+ }
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+ seq_printf(s, "\n\nTotal resource count: %d\n\n", resource_count);
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+
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+ mutex_unlock(&sm_state->map_lock);
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+
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+ return 0;
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+}
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+
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+/*
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+ * Adds a buffer to the private data list which tracks all the allocated
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+ * data.
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+ */
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+static void vc_sm_add_resource(struct vc_sm_privdata_t *privdata,
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+ struct vc_sm_buffer *buffer)
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+{
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+ mutex_lock(&sm_state->map_lock);
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+ list_add(&buffer->global_buffer_list, &sm_state->buffer_list);
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+ mutex_unlock(&sm_state->map_lock);
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+
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+ pr_debug("[%s]: added buffer %p (name %s, size %d)\n",
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+ __func__, buffer, buffer->name, buffer->size);
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+}
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+
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+/*
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+ * Release an allocation.
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+ * All refcounting is done via the dma buf object.
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+ */
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+static void vc_sm_release_resource(struct vc_sm_buffer *buffer, int force)
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+{
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+ mutex_lock(&sm_state->map_lock);
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+ mutex_lock(&buffer->lock);
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+
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+ pr_debug("[%s]: buffer %p (name %s, size %d)\n",
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+ __func__, buffer, buffer->name, buffer->size);
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+
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+ if (buffer->vc_handle && buffer->vpu_state == VPU_MAPPED) {
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+ struct vc_sm_free_t free = { buffer->vc_handle, 0 };
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+ int status = vc_sm_cma_vchi_free(sm_state->sm_handle, &free,
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+ &sm_state->int_trans_id);
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+ if (status != 0 && status != -EINTR) {
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+ pr_err("[%s]: failed to free memory on videocore (status: %u, trans_id: %u)\n",
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+ __func__, status, sm_state->int_trans_id);
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+ }
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+
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+ if (sm_state->require_released_callback) {
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+ /* Need to wait for the VPU to confirm the free */
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+
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+ /* Retain a reference on this until the VPU has
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+ * released it
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+ */
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+ buffer->vpu_state = VPU_UNMAPPING;
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+ goto defer;
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+ }
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+ buffer->vpu_state = VPU_NOT_MAPPED;
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+ buffer->vc_handle = 0;
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+ }
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+ if (buffer->vc_handle) {
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+ /* We've sent the unmap request but not had the response. */
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+ pr_err("[%s]: Waiting for VPU unmap response on %p\n",
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+ __func__, buffer);
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+ goto defer;
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+ }
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+ if (buffer->in_use) {
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+ /* Don't release dmabuf here - we await the release */
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+ pr_err("[%s]: buffer %p is still in use\n",
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+ __func__, buffer);
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+ goto defer;
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+ }
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+
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+ /* Handle cleaning up imported dmabufs */
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+ if (buffer->sgt) {
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+ dma_buf_unmap_attachment(buffer->attach, buffer->sgt,
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+ DMA_BIDIRECTIONAL);
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+ buffer->sgt = NULL;
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+ }
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+ if (buffer->attach) {
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+ dma_buf_detach(buffer->dma_buf, buffer->attach);
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+ buffer->attach = NULL;
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+ }
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+
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+ /* Release the dma_buf (whether ours or imported) */
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+ if (buffer->import_dma_buf) {
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+ dma_buf_put(buffer->import_dma_buf);
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+ buffer->import_dma_buf = NULL;
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+ buffer->dma_buf = NULL;
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+ } else if (buffer->dma_buf) {
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+ dma_buf_put(buffer->dma_buf);
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+ buffer->dma_buf = NULL;
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+ }
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+
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+ if (buffer->sg_table && !buffer->import_dma_buf) {
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+ /* Our own allocation that we need to dma_unmap_sg */
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+ dma_unmap_sg(&sm_state->pdev->dev, buffer->sg_table->sgl,
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+ buffer->sg_table->nents, DMA_BIDIRECTIONAL);
|
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+ }
|
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+
|
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+ /* Free the local resource. Start by removing it from the list */
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+ buffer->private = NULL;
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+ list_del(&buffer->global_buffer_list);
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+
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+ mutex_unlock(&buffer->lock);
|
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+ mutex_unlock(&sm_state->map_lock);
|
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+
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+ mutex_destroy(&buffer->lock);
|
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+
|
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+ kfree(buffer);
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+ return;
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+
|
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+defer:
|
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+ mutex_unlock(&buffer->lock);
|
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+ mutex_unlock(&sm_state->map_lock);
|
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+}
|
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+
|
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+/* Create support for private data tracking. */
|
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+static struct vc_sm_privdata_t *vc_sm_cma_create_priv_data(pid_t id)
|
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+{
|
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+ char alloc_name[32];
|
|
+ struct vc_sm_privdata_t *file_data = NULL;
|
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+
|
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+ /* Allocate private structure. */
|
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+ file_data = kzalloc(sizeof(*file_data), GFP_KERNEL);
|
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+
|
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+ if (!file_data)
|
|
+ return NULL;
|
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+
|
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+ snprintf(alloc_name, sizeof(alloc_name), "%d", id);
|
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+
|
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+ file_data->pid = id;
|
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+
|
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+ return file_data;
|
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+}
|
|
+
|
|
+/* Dma_buf operations for chaining through to an imported dma_buf */
|
|
+static
|
|
+int vc_sm_import_dma_buf_attach(struct dma_buf *dmabuf,
|
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+ struct dma_buf_attachment *attachment)
|
|
+{
|
|
+ struct vc_sm_buffer *res = dmabuf->priv;
|
|
+
|
|
+ if (!res->import_dma_buf)
|
|
+ return -EINVAL;
|
|
+ return res->import_dma_buf->ops->attach(res->import_dma_buf,
|
|
+ attachment);
|
|
+}
|
|
+
|
|
+static
|
|
+void vc_sm_import_dma_buf_detatch(struct dma_buf *dmabuf,
|
|
+ struct dma_buf_attachment *attachment)
|
|
+{
|
|
+ struct vc_sm_buffer *res = dmabuf->priv;
|
|
+
|
|
+ if (!res->import_dma_buf)
|
|
+ return;
|
|
+ res->import_dma_buf->ops->detach(res->import_dma_buf, attachment);
|
|
+}
|
|
+
|
|
+static
|
|
+struct sg_table *vc_sm_import_map_dma_buf(struct dma_buf_attachment *attachment,
|
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+ enum dma_data_direction direction)
|
|
+{
|
|
+ struct vc_sm_buffer *res = attachment->dmabuf->priv;
|
|
+
|
|
+ if (!res->import_dma_buf)
|
|
+ return NULL;
|
|
+ return res->import_dma_buf->ops->map_dma_buf(attachment, direction);
|
|
+}
|
|
+
|
|
+static
|
|
+void vc_sm_import_unmap_dma_buf(struct dma_buf_attachment *attachment,
|
|
+ struct sg_table *table,
|
|
+ enum dma_data_direction direction)
|
|
+{
|
|
+ struct vc_sm_buffer *res = attachment->dmabuf->priv;
|
|
+
|
|
+ if (!res->import_dma_buf)
|
|
+ return;
|
|
+ res->import_dma_buf->ops->unmap_dma_buf(attachment, table, direction);
|
|
+}
|
|
+
|
|
+static
|
|
+int vc_sm_import_dmabuf_mmap(struct dma_buf *dmabuf, struct vm_area_struct *vma)
|
|
+{
|
|
+ struct vc_sm_buffer *res = dmabuf->priv;
|
|
+
|
|
+ pr_debug("%s: mmap dma_buf %p, res %p, imported db %p\n", __func__,
|
|
+ dmabuf, res, res->import_dma_buf);
|
|
+ if (!res->import_dma_buf) {
|
|
+ pr_err("%s: mmap dma_buf %p- not an imported buffer\n",
|
|
+ __func__, dmabuf);
|
|
+ return -EINVAL;
|
|
+ }
|
|
+ return res->import_dma_buf->ops->mmap(res->import_dma_buf, vma);
|
|
+}
|
|
+
|
|
+static
|
|
+void vc_sm_import_dma_buf_release(struct dma_buf *dmabuf)
|
|
+{
|
|
+ struct vc_sm_buffer *res = dmabuf->priv;
|
|
+
|
|
+ pr_debug("%s: Relasing dma_buf %p\n", __func__, dmabuf);
|
|
+ if (!res->import_dma_buf)
|
|
+ return;
|
|
+
|
|
+ res->in_use = 0;
|
|
+
|
|
+ vc_sm_release_resource(res, 0);
|
|
+}
|
|
+
|
|
+static
|
|
+void *vc_sm_import_dma_buf_kmap(struct dma_buf *dmabuf,
|
|
+ unsigned long offset)
|
|
+{
|
|
+ struct vc_sm_buffer *res = dmabuf->priv;
|
|
+
|
|
+ if (!res->import_dma_buf)
|
|
+ return NULL;
|
|
+ return res->import_dma_buf->ops->map(res->import_dma_buf,
|
|
+ offset);
|
|
+}
|
|
+
|
|
+static
|
|
+void vc_sm_import_dma_buf_kunmap(struct dma_buf *dmabuf,
|
|
+ unsigned long offset, void *ptr)
|
|
+{
|
|
+ struct vc_sm_buffer *res = dmabuf->priv;
|
|
+
|
|
+ if (!res->import_dma_buf)
|
|
+ return;
|
|
+ res->import_dma_buf->ops->unmap(res->import_dma_buf,
|
|
+ offset, ptr);
|
|
+}
|
|
+
|
|
+static
|
|
+int vc_sm_import_dma_buf_begin_cpu_access(struct dma_buf *dmabuf,
|
|
+ enum dma_data_direction direction)
|
|
+{
|
|
+ struct vc_sm_buffer *res = dmabuf->priv;
|
|
+
|
|
+ if (!res->import_dma_buf)
|
|
+ return -EINVAL;
|
|
+ return res->import_dma_buf->ops->begin_cpu_access(res->import_dma_buf,
|
|
+ direction);
|
|
+}
|
|
+
|
|
+static
|
|
+int vc_sm_import_dma_buf_end_cpu_access(struct dma_buf *dmabuf,
|
|
+ enum dma_data_direction direction)
|
|
+{
|
|
+ struct vc_sm_buffer *res = dmabuf->priv;
|
|
+
|
|
+ if (!res->import_dma_buf)
|
|
+ return -EINVAL;
|
|
+ return res->import_dma_buf->ops->end_cpu_access(res->import_dma_buf,
|
|
+ direction);
|
|
+}
|
|
+
|
|
+static const struct dma_buf_ops dma_buf_import_ops = {
|
|
+ .map_dma_buf = vc_sm_import_map_dma_buf,
|
|
+ .unmap_dma_buf = vc_sm_import_unmap_dma_buf,
|
|
+ .mmap = vc_sm_import_dmabuf_mmap,
|
|
+ .release = vc_sm_import_dma_buf_release,
|
|
+ .attach = vc_sm_import_dma_buf_attach,
|
|
+ .detach = vc_sm_import_dma_buf_detatch,
|
|
+ .begin_cpu_access = vc_sm_import_dma_buf_begin_cpu_access,
|
|
+ .end_cpu_access = vc_sm_import_dma_buf_end_cpu_access,
|
|
+ .map = vc_sm_import_dma_buf_kmap,
|
|
+ .unmap = vc_sm_import_dma_buf_kunmap,
|
|
+};
|
|
+
|
|
+/* Import a dma_buf to be shared with VC. */
|
|
+int
|
|
+vc_sm_cma_import_dmabuf_internal(struct vc_sm_privdata_t *private,
|
|
+ struct dma_buf *dma_buf,
|
|
+ struct dma_buf **imported_buf)
|
|
+{
|
|
+ DEFINE_DMA_BUF_EXPORT_INFO(exp_info);
|
|
+ struct vc_sm_buffer *buffer = NULL;
|
|
+ struct vc_sm_import import = { };
|
|
+ struct vc_sm_import_result result = { };
|
|
+ struct dma_buf_attachment *attach = NULL;
|
|
+ struct sg_table *sgt = NULL;
|
|
+ int ret = 0;
|
|
+ int status;
|
|
+
|
|
+ /* Setup our allocation parameters */
|
|
+ pr_debug("%s: importing dma_buf %p\n", __func__, dma_buf);
|
|
+
|
|
+ get_dma_buf(dma_buf);
|
|
+ dma_buf = dma_buf;
|
|
+
|
|
+ attach = dma_buf_attach(dma_buf, &sm_state->pdev->dev);
|
|
+ if (IS_ERR(attach)) {
|
|
+ ret = PTR_ERR(attach);
|
|
+ goto error;
|
|
+ }
|
|
+
|
|
+ sgt = dma_buf_map_attachment(attach, DMA_BIDIRECTIONAL);
|
|
+ if (IS_ERR(sgt)) {
|
|
+ ret = PTR_ERR(sgt);
|
|
+ goto error;
|
|
+ }
|
|
+
|
|
+ /* Verify that the address block is contiguous */
|
|
+ if (sgt->nents != 1) {
|
|
+ ret = -ENOMEM;
|
|
+ goto error;
|
|
+ }
|
|
+
|
|
+ /* Allocate local buffer to track this allocation. */
|
|
+ buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
|
|
+ if (!buffer) {
|
|
+ ret = -ENOMEM;
|
|
+ goto error;
|
|
+ }
|
|
+
|
|
+ import.type = VC_SM_ALLOC_NON_CACHED;
|
|
+ import.addr = (uint32_t)sg_dma_address(sgt->sgl);
|
|
+ if ((import.addr & 0xC0000000) != 0xC0000000) {
|
|
+ pr_err("%s: Expecting an uncached alias for dma_addr %08x\n",
|
|
+ __func__, import.addr);
|
|
+ import.addr |= 0xC0000000;
|
|
+ }
|
|
+ import.size = sg_dma_len(sgt->sgl);
|
|
+ import.allocator = current->tgid;
|
|
+ import.kernel_id = (uint32_t)buffer; //FIXME: 64 bit support needed.
|
|
+
|
|
+ memcpy(import.name, VC_SM_RESOURCE_NAME_DEFAULT,
|
|
+ sizeof(VC_SM_RESOURCE_NAME_DEFAULT));
|
|
+
|
|
+ pr_debug("[%s]: attempt to import \"%s\" data - type %u, addr %p, size %u\n",
|
|
+ __func__, import.name, import.type, (void *)import.addr,
|
|
+ import.size);
|
|
+
|
|
+ /* Allocate the videocore buffer. */
|
|
+ status = vc_sm_cma_vchi_import(sm_state->sm_handle, &import, &result,
|
|
+ &sm_state->int_trans_id);
|
|
+ if (status == -EINTR) {
|
|
+ pr_debug("[%s]: requesting import memory action restart (trans_id: %u)\n",
|
|
+ __func__, sm_state->int_trans_id);
|
|
+ ret = -ERESTARTSYS;
|
|
+ private->restart_sys = -EINTR;
|
|
+ private->int_action = VC_SM_MSG_TYPE_IMPORT;
|
|
+ goto error;
|
|
+ } else if (status || !result.res_handle) {
|
|
+ pr_debug("[%s]: failed to import memory on videocore (status: %u, trans_id: %u)\n",
|
|
+ __func__, status, sm_state->int_trans_id);
|
|
+ ret = -ENOMEM;
|
|
+ goto error;
|
|
+ }
|
|
+
|
|
+ mutex_init(&buffer->lock);
|
|
+ INIT_LIST_HEAD(&buffer->attachments);
|
|
+ memcpy(buffer->name, import.name,
|
|
+ min(sizeof(buffer->name), sizeof(import.name) - 1));
|
|
+
|
|
+ /* Keep track of the buffer we created. */
|
|
+ buffer->private = private;
|
|
+ buffer->vc_handle = result.res_handle;
|
|
+ buffer->size = import.size;
|
|
+ buffer->vpu_state = VPU_MAPPED;
|
|
+
|
|
+ buffer->import_dma_buf = dma_buf;
|
|
+
|
|
+ buffer->attach = attach;
|
|
+ buffer->sgt = sgt;
|
|
+ buffer->dma_addr = sg_dma_address(sgt->sgl);
|
|
+ buffer->in_use = 1;
|
|
+
|
|
+ /*
|
|
+ * We're done - we need to export a new dmabuf chaining through most
|
|
+ * functions, but enabling us to release our own internal references
|
|
+ * here.
|
|
+ */
|
|
+ exp_info.ops = &dma_buf_import_ops;
|
|
+ exp_info.size = import.size;
|
|
+ exp_info.flags = O_RDWR;
|
|
+ exp_info.priv = buffer;
|
|
+
|
|
+ buffer->dma_buf = dma_buf_export(&exp_info);
|
|
+ if (IS_ERR(buffer->dma_buf)) {
|
|
+ ret = PTR_ERR(buffer->dma_buf);
|
|
+ goto error;
|
|
+ }
|
|
+
|
|
+ vc_sm_add_resource(private, buffer);
|
|
+
|
|
+ *imported_buf = buffer->dma_buf;
|
|
+
|
|
+ return 0;
|
|
+
|
|
+error:
|
|
+ if (result.res_handle) {
|
|
+ struct vc_sm_free_t free = { result.res_handle, 0 };
|
|
+
|
|
+ vc_sm_cma_vchi_free(sm_state->sm_handle, &free,
|
|
+ &sm_state->int_trans_id);
|
|
+ }
|
|
+ kfree(buffer);
|
|
+ if (sgt)
|
|
+ dma_buf_unmap_attachment(attach, sgt, DMA_BIDIRECTIONAL);
|
|
+ if (attach)
|
|
+ dma_buf_detach(dma_buf, attach);
|
|
+ dma_buf_put(dma_buf);
|
|
+ return ret;
|
|
+}
|
|
+
|
|
+/* FIXME: Pass a function pointer to this into vc_vchi_sm.c */
|
|
+void
|
|
+vc_sm_vpu_event(struct sm_instance *instance, struct vc_sm_result_t *reply,
|
|
+ int reply_len)
|
|
+{
|
|
+ switch (reply->trans_id & ~0x80000000) {
|
|
+ case VC_SM_MSG_TYPE_CLIENT_VERSION:
|
|
+ {
|
|
+ /* Acknowledge that the firmware supports the version command */
|
|
+ pr_debug("%s: firmware acked version msg. Require release cb\n",
|
|
+ __func__);
|
|
+ sm_state->require_released_callback = true;
|
|
+ }
|
|
+ break;
|
|
+ case VC_SM_MSG_TYPE_RELEASED:
|
|
+ {
|
|
+ struct vc_sm_released *release = (struct vc_sm_released *)reply;
|
|
+ struct vc_sm_buffer *buffer =
|
|
+ (struct vc_sm_buffer *)release->kernel_id;
|
|
+
|
|
+ /*
|
|
+ * FIXME: Need to check buffer is still valid and allocated
|
|
+ * before continuing
|
|
+ */
|
|
+ pr_debug("%s: Released addr %08x, size %u, id %08x, mem_handle %08x\n",
|
|
+ __func__, release->addr, release->size,
|
|
+ release->kernel_id, release->vc_handle);
|
|
+ mutex_lock(&buffer->lock);
|
|
+ buffer->vc_handle = 0;
|
|
+ buffer->vpu_state = VPU_NOT_MAPPED;
|
|
+ mutex_unlock(&buffer->lock);
|
|
+
|
|
+ vc_sm_release_resource(buffer, 0);
|
|
+ }
|
|
+ break;
|
|
+ default:
|
|
+ pr_err("%s: Unknown vpu cmd %x\n", __func__, reply->trans_id);
|
|
+ break;
|
|
+ }
|
|
+}
|
|
+
|
|
+/* Videocore connected. */
|
|
+static void vc_sm_connected_init(void)
|
|
+{
|
|
+ int ret;
|
|
+ VCHI_INSTANCE_T vchi_instance;
|
|
+ struct vc_sm_version version;
|
|
+ struct vc_sm_result_t version_result;
|
|
+
|
|
+ pr_info("[%s]: start\n", __func__);
|
|
+
|
|
+ /*
|
|
+ * Initialize and create a VCHI connection for the shared memory service
|
|
+ * running on videocore.
|
|
+ */
|
|
+ ret = vchi_initialise(&vchi_instance);
|
|
+ if (ret) {
|
|
+ pr_err("[%s]: failed to initialise VCHI instance (ret=%d)\n",
|
|
+ __func__, ret);
|
|
+
|
|
+ ret = -EIO;
|
|
+ goto err_free_mem;
|
|
+ }
|
|
+
|
|
+ ret = vchi_connect(vchi_instance);
|
|
+ if (ret) {
|
|
+ pr_err("[%s]: failed to connect VCHI instance (ret=%d)\n",
|
|
+ __func__, ret);
|
|
+
|
|
+ ret = -EIO;
|
|
+ goto err_free_mem;
|
|
+ }
|
|
+
|
|
+ /* Initialize an instance of the shared memory service. */
|
|
+ sm_state->sm_handle = vc_sm_cma_vchi_init(vchi_instance, 1,
|
|
+ vc_sm_vpu_event);
|
|
+ if (!sm_state->sm_handle) {
|
|
+ pr_err("[%s]: failed to initialize shared memory service\n",
|
|
+ __func__);
|
|
+
|
|
+ ret = -EPERM;
|
|
+ goto err_free_mem;
|
|
+ }
|
|
+
|
|
+ /* Create a debug fs directory entry (root). */
|
|
+ sm_state->dir_root = debugfs_create_dir(VC_SM_DIR_ROOT_NAME, NULL);
|
|
+ if (!sm_state->dir_root) {
|
|
+ pr_err("[%s]: failed to create \'%s\' directory entry\n",
|
|
+ __func__, VC_SM_DIR_ROOT_NAME);
|
|
+
|
|
+ ret = -EPERM;
|
|
+ goto err_stop_sm_service;
|
|
+ }
|
|
+
|
|
+ sm_state->dir_state.show = &vc_sm_cma_global_state_show;
|
|
+ sm_state->dir_state.dir_entry =
|
|
+ debugfs_create_file(VC_SM_STATE, 0444, sm_state->dir_root,
|
|
+ &sm_state->dir_state,
|
|
+ &vc_sm_cma_debug_fs_fops);
|
|
+
|
|
+ INIT_LIST_HEAD(&sm_state->buffer_list);
|
|
+
|
|
+ sm_state->data_knl = vc_sm_cma_create_priv_data(0);
|
|
+ if (!sm_state->data_knl) {
|
|
+ pr_err("[%s]: failed to create kernel private data tracker\n",
|
|
+ __func__);
|
|
+ goto err_remove_shared_memory;
|
|
+ }
|
|
+
|
|
+ version.version = 1;
|
|
+ ret = vc_sm_cma_vchi_client_version(sm_state->sm_handle, &version,
|
|
+ &version_result,
|
|
+ &sm_state->int_trans_id);
|
|
+ if (ret) {
|
|
+ pr_err("[%s]: Failed to send version request %d\n", __func__,
|
|
+ ret);
|
|
+ }
|
|
+
|
|
+ /* Done! */
|
|
+ sm_inited = 1;
|
|
+ pr_info("[%s]: installed successfully\n", __func__);
|
|
+ return;
|
|
+
|
|
+err_remove_shared_memory:
|
|
+ debugfs_remove_recursive(sm_state->dir_root);
|
|
+err_stop_sm_service:
|
|
+ vc_sm_cma_vchi_stop(&sm_state->sm_handle);
|
|
+err_free_mem:
|
|
+ kfree(sm_state);
|
|
+ pr_info("[%s]: failed, ret %d\n", __func__, ret);
|
|
+}
|
|
+
|
|
+/* Driver loading. */
|
|
+static int bcm2835_vc_sm_cma_probe(struct platform_device *pdev)
|
|
+{
|
|
+ struct device *dev = &pdev->dev;
|
|
+ int err;
|
|
+
|
|
+ pr_info("%s: Videocore shared memory driver\n", __func__);
|
|
+
|
|
+ sm_state = kzalloc(sizeof(*sm_state), GFP_KERNEL);
|
|
+ if (!sm_state)
|
|
+ return -ENOMEM;
|
|
+ sm_state->pdev = pdev;
|
|
+ mutex_init(&sm_state->map_lock);
|
|
+
|
|
+ dev->coherent_dma_mask = DMA_BIT_MASK(32);
|
|
+ dev->dma_mask = &dev->coherent_dma_mask;
|
|
+ err = of_dma_configure(dev, NULL, true);
|
|
+ if (err) {
|
|
+ dev_err(dev, "Unable to setup DMA: %d\n", err);
|
|
+ return err;
|
|
+ }
|
|
+
|
|
+ vchiq_add_connected_callback(vc_sm_connected_init);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+/* Driver unloading. */
|
|
+static int bcm2835_vc_sm_cma_remove(struct platform_device *pdev)
|
|
+{
|
|
+ pr_debug("[%s]: start\n", __func__);
|
|
+ if (sm_inited) {
|
|
+ /* Remove shared memory device. */
|
|
+ misc_deregister(&sm_state->dev);
|
|
+
|
|
+ /* Remove all proc entries. */
|
|
+ //debugfs_remove_recursive(sm_state->dir_root);
|
|
+
|
|
+ /* Stop the videocore shared memory service. */
|
|
+ vc_sm_cma_vchi_stop(&sm_state->sm_handle);
|
|
+
|
|
+ /* Free the memory for the state structure. */
|
|
+ mutex_destroy(&sm_state->map_lock);
|
|
+ kfree(sm_state);
|
|
+ }
|
|
+
|
|
+ pr_debug("[%s]: end\n", __func__);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+/* Get an internal resource handle mapped from the external one. */
|
|
+int vc_sm_cma_int_handle(int handle)
|
|
+{
|
|
+ struct dma_buf *dma_buf = (struct dma_buf *)handle;
|
|
+ struct vc_sm_buffer *res;
|
|
+
|
|
+ /* Validate we can work with this device. */
|
|
+ if (!sm_state || !handle) {
|
|
+ pr_err("[%s]: invalid input\n", __func__);
|
|
+ return 0;
|
|
+ }
|
|
+
|
|
+ res = (struct vc_sm_buffer *)dma_buf->priv;
|
|
+ return res->vc_handle;
|
|
+}
|
|
+EXPORT_SYMBOL_GPL(vc_sm_cma_int_handle);
|
|
+
|
|
+/* Free a previously allocated shared memory handle and block. */
|
|
+int vc_sm_cma_free(int handle)
|
|
+{
|
|
+ struct dma_buf *dma_buf = (struct dma_buf *)handle;
|
|
+
|
|
+ /* Validate we can work with this device. */
|
|
+ if (!sm_state || !handle) {
|
|
+ pr_err("[%s]: invalid input\n", __func__);
|
|
+ return -EPERM;
|
|
+ }
|
|
+
|
|
+ pr_debug("%s: handle %08x/dmabuf %p\n", __func__, handle, dma_buf);
|
|
+
|
|
+ dma_buf_put(dma_buf);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+EXPORT_SYMBOL_GPL(vc_sm_cma_free);
|
|
+
|
|
+/* Import a dmabuf to be shared with VC. */
|
|
+int vc_sm_cma_import_dmabuf(struct dma_buf *src_dmabuf, int *handle)
|
|
+{
|
|
+ struct dma_buf *new_dma_buf;
|
|
+ struct vc_sm_buffer *res;
|
|
+ int ret;
|
|
+
|
|
+ /* Validate we can work with this device. */
|
|
+ if (!sm_state || !src_dmabuf || !handle) {
|
|
+ pr_err("[%s]: invalid input\n", __func__);
|
|
+ return -EPERM;
|
|
+ }
|
|
+
|
|
+ ret = vc_sm_cma_import_dmabuf_internal(sm_state->data_knl, src_dmabuf,
|
|
+ &new_dma_buf);
|
|
+
|
|
+ if (!ret) {
|
|
+ pr_debug("%s: imported to ptr %p\n", __func__, new_dma_buf);
|
|
+ res = (struct vc_sm_buffer *)new_dma_buf->priv;
|
|
+
|
|
+ /* Assign valid handle at this time.*/
|
|
+ *handle = (int)new_dma_buf;
|
|
+ } else {
|
|
+ /*
|
|
+ * succeeded in importing the dma_buf, but then
|
|
+ * failed to look it up again. How?
|
|
+ * Release the fd again.
|
|
+ */
|
|
+ pr_err("%s: imported vc_sm_cma_get_buffer failed %d\n",
|
|
+ __func__, ret);
|
|
+ }
|
|
+
|
|
+ return ret;
|
|
+}
|
|
+EXPORT_SYMBOL_GPL(vc_sm_cma_import_dmabuf);
|
|
+
|
|
+static struct platform_driver bcm2835_vcsm_cma_driver = {
|
|
+ .probe = bcm2835_vc_sm_cma_probe,
|
|
+ .remove = bcm2835_vc_sm_cma_remove,
|
|
+ .driver = {
|
|
+ .name = DEVICE_NAME,
|
|
+ .owner = THIS_MODULE,
|
|
+ },
|
|
+};
|
|
+
|
|
+module_platform_driver(bcm2835_vcsm_cma_driver);
|
|
+
|
|
+MODULE_AUTHOR("Dave Stevenson");
|
|
+MODULE_DESCRIPTION("VideoCore CMA Shared Memory Driver");
|
|
+MODULE_LICENSE("GPL v2");
|
|
+MODULE_ALIAS("platform:vcsm-cma");
|
|
--- /dev/null
|
|
+++ b/drivers/staging/vc04_services/vc-sm-cma/vc_sm.h
|
|
@@ -0,0 +1,59 @@
|
|
+/* SPDX-License-Identifier: GPL-2.0 */
|
|
+
|
|
+/*
|
|
+ * VideoCore Shared Memory driver using CMA.
|
|
+ *
|
|
+ * Copyright: 2018, Raspberry Pi (Trading) Ltd
|
|
+ *
|
|
+ */
|
|
+
|
|
+#ifndef VC_SM_H
|
|
+#define VC_SM_H
|
|
+
|
|
+#include <linux/device.h>
|
|
+#include <linux/dma-direction.h>
|
|
+#include <linux/kref.h>
|
|
+#include <linux/mm_types.h>
|
|
+#include <linux/mutex.h>
|
|
+#include <linux/rbtree.h>
|
|
+#include <linux/sched.h>
|
|
+#include <linux/shrinker.h>
|
|
+#include <linux/types.h>
|
|
+#include <linux/miscdevice.h>
|
|
+
|
|
+#define VC_SM_MAX_NAME_LEN 32
|
|
+
|
|
+enum vc_sm_vpu_mapping_state {
|
|
+ VPU_NOT_MAPPED,
|
|
+ VPU_MAPPED,
|
|
+ VPU_UNMAPPING
|
|
+};
|
|
+
|
|
+struct vc_sm_buffer {
|
|
+ struct list_head global_buffer_list; /* Global list of buffers. */
|
|
+
|
|
+ size_t size;
|
|
+
|
|
+ /* Lock over all the following state for this buffer */
|
|
+ struct mutex lock;
|
|
+ struct sg_table *sg_table;
|
|
+ struct list_head attachments;
|
|
+
|
|
+ char name[VC_SM_MAX_NAME_LEN];
|
|
+
|
|
+ int in_use:1; /* Kernel is still using this resource */
|
|
+
|
|
+ enum vc_sm_vpu_mapping_state vpu_state;
|
|
+ u32 vc_handle; /* VideoCore handle for this buffer */
|
|
+
|
|
+ /* DMABUF related fields */
|
|
+ struct dma_buf *import_dma_buf;
|
|
+ struct dma_buf *dma_buf;
|
|
+ struct dma_buf_attachment *attach;
|
|
+ struct sg_table *sgt;
|
|
+ dma_addr_t dma_addr;
|
|
+
|
|
+ struct vc_sm_privdata_t *private;
|
|
+};
|
|
+
|
|
+#endif
|
|
--- /dev/null
|
|
+++ b/drivers/staging/vc04_services/vc-sm-cma/vc_sm_cma_vchi.c
|
|
@@ -0,0 +1,498 @@
|
|
+// SPDX-License-Identifier: GPL-2.0
|
|
+/*
|
|
+ * VideoCore Shared Memory CMA allocator
|
|
+ *
|
|
+ * Copyright: 2018, Raspberry Pi (Trading) Ltd
|
|
+ * Copyright 2011-2012 Broadcom Corporation. All rights reserved.
|
|
+ *
|
|
+ * Based on vmcs_sm driver from Broadcom Corporation.
|
|
+ *
|
|
+ */
|
|
+
|
|
+/* ---- Include Files ----------------------------------------------------- */
|
|
+#include <linux/completion.h>
|
|
+#include <linux/kernel.h>
|
|
+#include <linux/kthread.h>
|
|
+#include <linux/list.h>
|
|
+#include <linux/mutex.h>
|
|
+#include <linux/semaphore.h>
|
|
+#include <linux/slab.h>
|
|
+#include <linux/types.h>
|
|
+
|
|
+#include "vc_sm_cma_vchi.h"
|
|
+
|
|
+#define VC_SM_VER 1
|
|
+#define VC_SM_MIN_VER 0
|
|
+
|
|
+/* ---- Private Constants and Types -------------------------------------- */
|
|
+
|
|
+/* Command blocks come from a pool */
|
|
+#define SM_MAX_NUM_CMD_RSP_BLKS 32
|
|
+
|
|
+struct sm_cmd_rsp_blk {
|
|
+ struct list_head head; /* To create lists */
|
|
+ /* To be signaled when the response is there */
|
|
+ struct completion cmplt;
|
|
+
|
|
+ u16 id;
|
|
+ u16 length;
|
|
+
|
|
+ u8 msg[VC_SM_MAX_MSG_LEN];
|
|
+
|
|
+ uint32_t wait:1;
|
|
+ uint32_t sent:1;
|
|
+ uint32_t alloc:1;
|
|
+
|
|
+};
|
|
+
|
|
+struct sm_instance {
|
|
+ u32 num_connections;
|
|
+ VCHI_SERVICE_HANDLE_T vchi_handle[VCHI_MAX_NUM_CONNECTIONS];
|
|
+ struct task_struct *io_thread;
|
|
+ struct completion io_cmplt;
|
|
+
|
|
+ vpu_event_cb vpu_event;
|
|
+
|
|
+ /* Mutex over the following lists */
|
|
+ struct mutex lock;
|
|
+ u32 trans_id;
|
|
+ struct list_head cmd_list;
|
|
+ struct list_head rsp_list;
|
|
+ struct list_head dead_list;
|
|
+
|
|
+ struct sm_cmd_rsp_blk free_blk[SM_MAX_NUM_CMD_RSP_BLKS];
|
|
+
|
|
+ /* Mutex over the free_list */
|
|
+ struct mutex free_lock;
|
|
+ struct list_head free_list;
|
|
+
|
|
+ struct semaphore free_sema;
|
|
+
|
|
+};
|
|
+
|
|
+/* ---- Private Variables ------------------------------------------------ */
|
|
+
|
|
+/* ---- Private Function Prototypes -------------------------------------- */
|
|
+
|
|
+/* ---- Private Functions ------------------------------------------------ */
|
|
+static int
|
|
+bcm2835_vchi_msg_queue(VCHI_SERVICE_HANDLE_T handle,
|
|
+ void *data,
|
|
+ unsigned int size)
|
|
+{
|
|
+ return vchi_queue_kernel_message(handle,
|
|
+ data,
|
|
+ size);
|
|
+}
|
|
+
|
|
+static struct
|
|
+sm_cmd_rsp_blk *vc_vchi_cmd_create(struct sm_instance *instance,
|
|
+ enum vc_sm_msg_type id, void *msg,
|
|
+ u32 size, int wait)
|
|
+{
|
|
+ struct sm_cmd_rsp_blk *blk;
|
|
+ struct vc_sm_msg_hdr_t *hdr;
|
|
+
|
|
+ if (down_interruptible(&instance->free_sema)) {
|
|
+ blk = kmalloc(sizeof(*blk), GFP_KERNEL);
|
|
+ if (!blk)
|
|
+ return NULL;
|
|
+
|
|
+ blk->alloc = 1;
|
|
+ init_completion(&blk->cmplt);
|
|
+ } else {
|
|
+ mutex_lock(&instance->free_lock);
|
|
+ blk =
|
|
+ list_first_entry(&instance->free_list,
|
|
+ struct sm_cmd_rsp_blk, head);
|
|
+ list_del(&blk->head);
|
|
+ mutex_unlock(&instance->free_lock);
|
|
+ }
|
|
+
|
|
+ blk->sent = 0;
|
|
+ blk->wait = wait;
|
|
+ blk->length = sizeof(*hdr) + size;
|
|
+
|
|
+ hdr = (struct vc_sm_msg_hdr_t *)blk->msg;
|
|
+ hdr->type = id;
|
|
+ mutex_lock(&instance->lock);
|
|
+ instance->trans_id++;
|
|
+ /*
|
|
+ * Retain the top bit for identifying asynchronous events, or VPU cmds.
|
|
+ */
|
|
+ instance->trans_id &= ~0x80000000;
|
|
+ hdr->trans_id = instance->trans_id;
|
|
+ blk->id = instance->trans_id;
|
|
+ mutex_unlock(&instance->lock);
|
|
+
|
|
+ if (size)
|
|
+ memcpy(hdr->body, msg, size);
|
|
+
|
|
+ return blk;
|
|
+}
|
|
+
|
|
+static void
|
|
+vc_vchi_cmd_delete(struct sm_instance *instance, struct sm_cmd_rsp_blk *blk)
|
|
+{
|
|
+ if (blk->alloc) {
|
|
+ kfree(blk);
|
|
+ return;
|
|
+ }
|
|
+
|
|
+ mutex_lock(&instance->free_lock);
|
|
+ list_add(&blk->head, &instance->free_list);
|
|
+ mutex_unlock(&instance->free_lock);
|
|
+ up(&instance->free_sema);
|
|
+}
|
|
+
|
|
+static void vc_sm_cma_vchi_rx_ack(struct sm_instance *instance,
|
|
+ struct sm_cmd_rsp_blk *cmd,
|
|
+ struct vc_sm_result_t *reply,
|
|
+ u32 reply_len)
|
|
+{
|
|
+ mutex_lock(&instance->lock);
|
|
+ list_for_each_entry(cmd,
|
|
+ &instance->rsp_list,
|
|
+ head) {
|
|
+ if (cmd->id == reply->trans_id)
|
|
+ break;
|
|
+ }
|
|
+ mutex_unlock(&instance->lock);
|
|
+
|
|
+ if (&cmd->head == &instance->rsp_list) {
|
|
+ //pr_debug("%s: received response %u, throw away...",
|
|
+ pr_err("%s: received response %u, throw away...",
|
|
+ __func__,
|
|
+ reply->trans_id);
|
|
+ } else if (reply_len > sizeof(cmd->msg)) {
|
|
+ pr_err("%s: reply too big (%u) %u, throw away...",
|
|
+ __func__, reply_len,
|
|
+ reply->trans_id);
|
|
+ } else {
|
|
+ memcpy(cmd->msg, reply,
|
|
+ reply_len);
|
|
+ complete(&cmd->cmplt);
|
|
+ }
|
|
+}
|
|
+
|
|
+static int vc_sm_cma_vchi_videocore_io(void *arg)
|
|
+{
|
|
+ struct sm_instance *instance = arg;
|
|
+ struct sm_cmd_rsp_blk *cmd = NULL, *cmd_tmp;
|
|
+ struct vc_sm_result_t *reply;
|
|
+ u32 reply_len;
|
|
+ s32 status;
|
|
+ int svc_use = 1;
|
|
+
|
|
+ while (1) {
|
|
+ if (svc_use)
|
|
+ vchi_service_release(instance->vchi_handle[0]);
|
|
+ svc_use = 0;
|
|
+ if (!wait_for_completion_interruptible(&instance->io_cmplt)) {
|
|
+ vchi_service_use(instance->vchi_handle[0]);
|
|
+ svc_use = 1;
|
|
+
|
|
+ do {
|
|
+ /*
|
|
+ * Get new command and move it to response list
|
|
+ */
|
|
+ mutex_lock(&instance->lock);
|
|
+ if (list_empty(&instance->cmd_list)) {
|
|
+ /* no more commands to process */
|
|
+ mutex_unlock(&instance->lock);
|
|
+ break;
|
|
+ }
|
|
+ cmd =
|
|
+ list_first_entry(&instance->cmd_list,
|
|
+ struct sm_cmd_rsp_blk,
|
|
+ head);
|
|
+ list_move(&cmd->head, &instance->rsp_list);
|
|
+ cmd->sent = 1;
|
|
+ mutex_unlock(&instance->lock);
|
|
+
|
|
+ /* Send the command */
|
|
+ status = bcm2835_vchi_msg_queue(
|
|
+ instance->vchi_handle[0],
|
|
+ cmd->msg, cmd->length);
|
|
+ if (status) {
|
|
+ pr_err("%s: failed to queue message (%d)",
|
|
+ __func__, status);
|
|
+ }
|
|
+
|
|
+ /* If no reply is needed then we're done */
|
|
+ if (!cmd->wait) {
|
|
+ mutex_lock(&instance->lock);
|
|
+ list_del(&cmd->head);
|
|
+ mutex_unlock(&instance->lock);
|
|
+ vc_vchi_cmd_delete(instance, cmd);
|
|
+ continue;
|
|
+ }
|
|
+
|
|
+ if (status) {
|
|
+ complete(&cmd->cmplt);
|
|
+ continue;
|
|
+ }
|
|
+
|
|
+ } while (1);
|
|
+
|
|
+ while (!vchi_msg_peek(instance->vchi_handle[0],
|
|
+ (void **)&reply, &reply_len,
|
|
+ VCHI_FLAGS_NONE)) {
|
|
+ if (reply->trans_id & 0x80000000) {
|
|
+ /* Async event or cmd from the VPU */
|
|
+ if (instance->vpu_event)
|
|
+ instance->vpu_event(
|
|
+ instance, reply,
|
|
+ reply_len);
|
|
+ } else {
|
|
+ vc_sm_cma_vchi_rx_ack(instance, cmd,
|
|
+ reply, reply_len);
|
|
+ }
|
|
+
|
|
+ vchi_msg_remove(instance->vchi_handle[0]);
|
|
+ }
|
|
+
|
|
+ /* Go through the dead list and free them */
|
|
+ mutex_lock(&instance->lock);
|
|
+ list_for_each_entry_safe(cmd, cmd_tmp,
|
|
+ &instance->dead_list, head) {
|
|
+ list_del(&cmd->head);
|
|
+ vc_vchi_cmd_delete(instance, cmd);
|
|
+ }
|
|
+ mutex_unlock(&instance->lock);
|
|
+ }
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static void vc_sm_cma_vchi_callback(void *param,
|
|
+ const VCHI_CALLBACK_REASON_T reason,
|
|
+ void *msg_handle)
|
|
+{
|
|
+ struct sm_instance *instance = param;
|
|
+
|
|
+ (void)msg_handle;
|
|
+
|
|
+ switch (reason) {
|
|
+ case VCHI_CALLBACK_MSG_AVAILABLE:
|
|
+ complete(&instance->io_cmplt);
|
|
+ break;
|
|
+
|
|
+ case VCHI_CALLBACK_SERVICE_CLOSED:
|
|
+ pr_info("%s: service CLOSED!!", __func__);
|
|
+ default:
|
|
+ break;
|
|
+ }
|
|
+}
|
|
+
|
|
+struct sm_instance *vc_sm_cma_vchi_init(VCHI_INSTANCE_T vchi_instance,
|
|
+ unsigned int num_connections,
|
|
+ vpu_event_cb vpu_event)
|
|
+{
|
|
+ u32 i;
|
|
+ struct sm_instance *instance;
|
|
+ int status;
|
|
+
|
|
+ pr_debug("%s: start", __func__);
|
|
+
|
|
+ if (num_connections > VCHI_MAX_NUM_CONNECTIONS) {
|
|
+ pr_err("%s: unsupported number of connections %u (max=%u)",
|
|
+ __func__, num_connections, VCHI_MAX_NUM_CONNECTIONS);
|
|
+
|
|
+ goto err_null;
|
|
+ }
|
|
+ /* Allocate memory for this instance */
|
|
+ instance = kzalloc(sizeof(*instance), GFP_KERNEL);
|
|
+
|
|
+ /* Misc initialisations */
|
|
+ mutex_init(&instance->lock);
|
|
+ init_completion(&instance->io_cmplt);
|
|
+ INIT_LIST_HEAD(&instance->cmd_list);
|
|
+ INIT_LIST_HEAD(&instance->rsp_list);
|
|
+ INIT_LIST_HEAD(&instance->dead_list);
|
|
+ INIT_LIST_HEAD(&instance->free_list);
|
|
+ sema_init(&instance->free_sema, SM_MAX_NUM_CMD_RSP_BLKS);
|
|
+ mutex_init(&instance->free_lock);
|
|
+ for (i = 0; i < SM_MAX_NUM_CMD_RSP_BLKS; i++) {
|
|
+ init_completion(&instance->free_blk[i].cmplt);
|
|
+ list_add(&instance->free_blk[i].head, &instance->free_list);
|
|
+ }
|
|
+
|
|
+ /* Open the VCHI service connections */
|
|
+ instance->num_connections = num_connections;
|
|
+ for (i = 0; i < num_connections; i++) {
|
|
+ SERVICE_CREATION_T params = {
|
|
+ .version = VCHI_VERSION_EX(VC_SM_VER, VC_SM_MIN_VER),
|
|
+ .service_id = VC_SM_SERVER_NAME,
|
|
+ .callback = vc_sm_cma_vchi_callback,
|
|
+ .callback_param = instance,
|
|
+ };
|
|
+
|
|
+ status = vchi_service_open(vchi_instance,
|
|
+ ¶ms, &instance->vchi_handle[i]);
|
|
+ if (status) {
|
|
+ pr_err("%s: failed to open VCHI service (%d)",
|
|
+ __func__, status);
|
|
+
|
|
+ goto err_close_services;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ /* Create the thread which takes care of all io to/from videoocore. */
|
|
+ instance->io_thread = kthread_create(&vc_sm_cma_vchi_videocore_io,
|
|
+ (void *)instance, "SMIO");
|
|
+ if (!instance->io_thread) {
|
|
+ pr_err("%s: failed to create SMIO thread", __func__);
|
|
+
|
|
+ goto err_close_services;
|
|
+ }
|
|
+ instance->vpu_event = vpu_event;
|
|
+ set_user_nice(instance->io_thread, -10);
|
|
+ wake_up_process(instance->io_thread);
|
|
+
|
|
+ pr_debug("%s: success - instance 0x%x", __func__,
|
|
+ (unsigned int)instance);
|
|
+ return instance;
|
|
+
|
|
+err_close_services:
|
|
+ for (i = 0; i < instance->num_connections; i++) {
|
|
+ if (instance->vchi_handle[i])
|
|
+ vchi_service_close(instance->vchi_handle[i]);
|
|
+ }
|
|
+ kfree(instance);
|
|
+err_null:
|
|
+ pr_debug("%s: FAILED", __func__);
|
|
+ return NULL;
|
|
+}
|
|
+
|
|
+int vc_sm_cma_vchi_stop(struct sm_instance **handle)
|
|
+{
|
|
+ struct sm_instance *instance;
|
|
+ u32 i;
|
|
+
|
|
+ if (!handle) {
|
|
+ pr_err("%s: invalid pointer to handle %p", __func__, handle);
|
|
+ goto lock;
|
|
+ }
|
|
+
|
|
+ if (!*handle) {
|
|
+ pr_err("%s: invalid handle %p", __func__, *handle);
|
|
+ goto lock;
|
|
+ }
|
|
+
|
|
+ instance = *handle;
|
|
+
|
|
+ /* Close all VCHI service connections */
|
|
+ for (i = 0; i < instance->num_connections; i++) {
|
|
+ s32 success;
|
|
+
|
|
+ vchi_service_use(instance->vchi_handle[i]);
|
|
+
|
|
+ success = vchi_service_close(instance->vchi_handle[i]);
|
|
+ }
|
|
+
|
|
+ kfree(instance);
|
|
+
|
|
+ *handle = NULL;
|
|
+ return 0;
|
|
+
|
|
+lock:
|
|
+ return -EINVAL;
|
|
+}
|
|
+
|
|
+static int vc_sm_cma_vchi_send_msg(struct sm_instance *handle,
|
|
+ enum vc_sm_msg_type msg_id, void *msg,
|
|
+ u32 msg_size, void *result, u32 result_size,
|
|
+ u32 *cur_trans_id, u8 wait_reply)
|
|
+{
|
|
+ int status = 0;
|
|
+ struct sm_instance *instance = handle;
|
|
+ struct sm_cmd_rsp_blk *cmd_blk;
|
|
+
|
|
+ if (!handle) {
|
|
+ pr_err("%s: invalid handle", __func__);
|
|
+ return -EINVAL;
|
|
+ }
|
|
+ if (!msg) {
|
|
+ pr_err("%s: invalid msg pointer", __func__);
|
|
+ return -EINVAL;
|
|
+ }
|
|
+
|
|
+ cmd_blk =
|
|
+ vc_vchi_cmd_create(instance, msg_id, msg, msg_size, wait_reply);
|
|
+ if (!cmd_blk) {
|
|
+ pr_err("[%s]: failed to allocate global tracking resource",
|
|
+ __func__);
|
|
+ return -ENOMEM;
|
|
+ }
|
|
+
|
|
+ if (cur_trans_id)
|
|
+ *cur_trans_id = cmd_blk->id;
|
|
+
|
|
+ mutex_lock(&instance->lock);
|
|
+ list_add_tail(&cmd_blk->head, &instance->cmd_list);
|
|
+ mutex_unlock(&instance->lock);
|
|
+ complete(&instance->io_cmplt);
|
|
+
|
|
+ if (!wait_reply)
|
|
+ /* We're done */
|
|
+ return 0;
|
|
+
|
|
+ /* Wait for the response */
|
|
+ if (wait_for_completion_interruptible(&cmd_blk->cmplt)) {
|
|
+ mutex_lock(&instance->lock);
|
|
+ if (!cmd_blk->sent) {
|
|
+ list_del(&cmd_blk->head);
|
|
+ mutex_unlock(&instance->lock);
|
|
+ vc_vchi_cmd_delete(instance, cmd_blk);
|
|
+ return -ENXIO;
|
|
+ }
|
|
+
|
|
+ list_move(&cmd_blk->head, &instance->dead_list);
|
|
+ mutex_unlock(&instance->lock);
|
|
+ complete(&instance->io_cmplt);
|
|
+ return -EINTR; /* We're done */
|
|
+ }
|
|
+
|
|
+ if (result && result_size) {
|
|
+ memcpy(result, cmd_blk->msg, result_size);
|
|
+ } else {
|
|
+ struct vc_sm_result_t *res =
|
|
+ (struct vc_sm_result_t *)cmd_blk->msg;
|
|
+ status = (res->success == 0) ? 0 : -ENXIO;
|
|
+ }
|
|
+
|
|
+ mutex_lock(&instance->lock);
|
|
+ list_del(&cmd_blk->head);
|
|
+ mutex_unlock(&instance->lock);
|
|
+ vc_vchi_cmd_delete(instance, cmd_blk);
|
|
+ return status;
|
|
+}
|
|
+
|
|
+int vc_sm_cma_vchi_free(struct sm_instance *handle, struct vc_sm_free_t *msg,
|
|
+ u32 *cur_trans_id)
|
|
+{
|
|
+ return vc_sm_cma_vchi_send_msg(handle, VC_SM_MSG_TYPE_FREE,
|
|
+ msg, sizeof(*msg), 0, 0, cur_trans_id, 0);
|
|
+}
|
|
+
|
|
+int vc_sm_cma_vchi_import(struct sm_instance *handle, struct vc_sm_import *msg,
|
|
+ struct vc_sm_import_result *result, u32 *cur_trans_id)
|
|
+{
|
|
+ return vc_sm_cma_vchi_send_msg(handle, VC_SM_MSG_TYPE_IMPORT,
|
|
+ msg, sizeof(*msg), result, sizeof(*result),
|
|
+ cur_trans_id, 1);
|
|
+}
|
|
+
|
|
+int vc_sm_cma_vchi_client_version(struct sm_instance *handle,
|
|
+ struct vc_sm_version *msg,
|
|
+ struct vc_sm_result_t *result,
|
|
+ u32 *cur_trans_id)
|
|
+{
|
|
+ return vc_sm_cma_vchi_send_msg(handle, VC_SM_MSG_TYPE_CLIENT_VERSION,
|
|
+ //msg, sizeof(*msg), result, sizeof(*result),
|
|
+ //cur_trans_id, 1);
|
|
+ msg, sizeof(*msg), NULL, 0,
|
|
+ cur_trans_id, 0);
|
|
+}
|
|
--- /dev/null
|
|
+++ b/drivers/staging/vc04_services/vc-sm-cma/vc_sm_cma_vchi.h
|
|
@@ -0,0 +1,59 @@
|
|
+/* SPDX-License-Identifier: GPL-2.0 */
|
|
+
|
|
+/*
|
|
+ * VideoCore Shared Memory CMA allocator
|
|
+ *
|
|
+ * Copyright: 2018, Raspberry Pi (Trading) Ltd
|
|
+ * Copyright 2011-2012 Broadcom Corporation. All rights reserved.
|
|
+ *
|
|
+ * Based on vmcs_sm driver from Broadcom Corporation.
|
|
+ *
|
|
+ */
|
|
+
|
|
+#ifndef __VC_SM_CMA_VCHI_H__INCLUDED__
|
|
+#define __VC_SM_CMA_VCHI_H__INCLUDED__
|
|
+
|
|
+#include "interface/vchi/vchi.h"
|
|
+
|
|
+#include "vc_sm_defs.h"
|
|
+
|
|
+/*
|
|
+ * Forward declare.
|
|
+ */
|
|
+struct sm_instance;
|
|
+
|
|
+typedef void (*vpu_event_cb)(struct sm_instance *instance,
|
|
+ struct vc_sm_result_t *reply, int reply_len);
|
|
+
|
|
+/*
|
|
+ * Initialize the shared memory service, opens up vchi connection to talk to it.
|
|
+ */
|
|
+struct sm_instance *vc_sm_cma_vchi_init(VCHI_INSTANCE_T vchi_instance,
|
|
+ unsigned int num_connections,
|
|
+ vpu_event_cb vpu_event);
|
|
+
|
|
+/*
|
|
+ * Terminates the shared memory service.
|
|
+ */
|
|
+int vc_sm_cma_vchi_stop(struct sm_instance **handle);
|
|
+
|
|
+/*
|
|
+ * Ask the shared memory service to free up some memory that was previously
|
|
+ * allocated by the vc_sm_cma_vchi_alloc function call.
|
|
+ */
|
|
+int vc_sm_cma_vchi_free(struct sm_instance *handle, struct vc_sm_free_t *msg,
|
|
+ u32 *cur_trans_id);
|
|
+
|
|
+/*
|
|
+ * Import a contiguous block of memory and wrap it in a GPU MEM_HANDLE_T.
|
|
+ */
|
|
+int vc_sm_cma_vchi_import(struct sm_instance *handle, struct vc_sm_import *msg,
|
|
+ struct vc_sm_import_result *result,
|
|
+ u32 *cur_trans_id);
|
|
+
|
|
+int vc_sm_cma_vchi_client_version(struct sm_instance *handle,
|
|
+ struct vc_sm_version *msg,
|
|
+ struct vc_sm_result_t *result,
|
|
+ u32 *cur_trans_id);
|
|
+
|
|
+#endif /* __VC_SM_CMA_VCHI_H__INCLUDED__ */
|
|
--- /dev/null
|
|
+++ b/drivers/staging/vc04_services/vc-sm-cma/vc_sm_defs.h
|
|
@@ -0,0 +1,298 @@
|
|
+/* SPDX-License-Identifier: GPL-2.0 */
|
|
+
|
|
+/*
|
|
+ * VideoCore Shared Memory CMA allocator
|
|
+ *
|
|
+ * Copyright: 2018, Raspberry Pi (Trading) Ltd
|
|
+ *
|
|
+ * Based on vc_sm_defs.h from the vmcs_sm driver Copyright Broadcom Corporation.
|
|
+ * All IPC messages are copied across to this file, even if the vc-sm-cma
|
|
+ * driver is not currently using them.
|
|
+ *
|
|
+ ****************************************************************************
|
|
+ */
|
|
+
|
|
+#ifndef __VC_SM_DEFS_H__INCLUDED__
|
|
+#define __VC_SM_DEFS_H__INCLUDED__
|
|
+
|
|
+/* FourCC code used for VCHI connection */
|
|
+#define VC_SM_SERVER_NAME MAKE_FOURCC("SMEM")
|
|
+
|
|
+/* Maximum message length */
|
|
+#define VC_SM_MAX_MSG_LEN (sizeof(union vc_sm_msg_union_t) + \
|
|
+ sizeof(struct vc_sm_msg_hdr_t))
|
|
+#define VC_SM_MAX_RSP_LEN (sizeof(union vc_sm_msg_union_t))
|
|
+
|
|
+/* Resource name maximum size */
|
|
+#define VC_SM_RESOURCE_NAME 32
|
|
+
|
|
+/*
|
|
+ * Version to be reported to the VPU
|
|
+ * VPU assumes 0 (aka 1) which does not require the released callback, nor
|
|
+ * expect the client to handle VC_MEM_REQUESTS.
|
|
+ * Version 2 requires the released callback, and must support VC_MEM_REQUESTS.
|
|
+ */
|
|
+#define VC_SM_PROTOCOL_VERSION 2
|
|
+
|
|
+enum vc_sm_msg_type {
|
|
+ /* Message types supported for HOST->VC direction */
|
|
+
|
|
+ /* Allocate shared memory block */
|
|
+ VC_SM_MSG_TYPE_ALLOC,
|
|
+ /* Lock allocated shared memory block */
|
|
+ VC_SM_MSG_TYPE_LOCK,
|
|
+ /* Unlock allocated shared memory block */
|
|
+ VC_SM_MSG_TYPE_UNLOCK,
|
|
+ /* Unlock allocated shared memory block, do not answer command */
|
|
+ VC_SM_MSG_TYPE_UNLOCK_NOANS,
|
|
+ /* Free shared memory block */
|
|
+ VC_SM_MSG_TYPE_FREE,
|
|
+ /* Resize a shared memory block */
|
|
+ VC_SM_MSG_TYPE_RESIZE,
|
|
+ /* Walk the allocated shared memory block(s) */
|
|
+ VC_SM_MSG_TYPE_WALK_ALLOC,
|
|
+
|
|
+ /* A previously applied action will need to be reverted */
|
|
+ VC_SM_MSG_TYPE_ACTION_CLEAN,
|
|
+
|
|
+ /*
|
|
+ * Import a physical address and wrap into a MEM_HANDLE_T.
|
|
+ * Release with VC_SM_MSG_TYPE_FREE.
|
|
+ */
|
|
+ VC_SM_MSG_TYPE_IMPORT,
|
|
+ /*
|
|
+ *Tells VC the protocol version supported by this client.
|
|
+ * 2 supports the async/cmd messages from the VPU for final release
|
|
+ * of memory, and for VC allocations.
|
|
+ */
|
|
+ VC_SM_MSG_TYPE_CLIENT_VERSION,
|
|
+ /* Response to VC request for memory */
|
|
+ VC_SM_MSG_TYPE_VC_MEM_REQUEST_REPLY,
|
|
+
|
|
+ /*
|
|
+ * Asynchronous/cmd messages supported for VC->HOST direction.
|
|
+ * Signalled by setting the top bit in vc_sm_result_t trans_id.
|
|
+ */
|
|
+
|
|
+ /*
|
|
+ * VC has finished with an imported memory allocation.
|
|
+ * Release any Linux reference counts on the underlying block.
|
|
+ */
|
|
+ VC_SM_MSG_TYPE_RELEASED,
|
|
+ /* VC request for memory */
|
|
+ VC_SM_MSG_TYPE_VC_MEM_REQUEST,
|
|
+
|
|
+ VC_SM_MSG_TYPE_MAX
|
|
+};
|
|
+
|
|
+/* Type of memory to be allocated */
|
|
+enum vc_sm_alloc_type_t {
|
|
+ VC_SM_ALLOC_CACHED,
|
|
+ VC_SM_ALLOC_NON_CACHED,
|
|
+};
|
|
+
|
|
+/* Message header for all messages in HOST->VC direction */
|
|
+struct vc_sm_msg_hdr_t {
|
|
+ u32 type;
|
|
+ u32 trans_id;
|
|
+ u8 body[0];
|
|
+
|
|
+};
|
|
+
|
|
+/* Request to allocate memory (HOST->VC) */
|
|
+struct vc_sm_alloc_t {
|
|
+ /* type of memory to allocate */
|
|
+ enum vc_sm_alloc_type_t type;
|
|
+ /* byte amount of data to allocate per unit */
|
|
+ u32 base_unit;
|
|
+ /* number of unit to allocate */
|
|
+ u32 num_unit;
|
|
+ /* alignment to be applied on allocation */
|
|
+ u32 alignment;
|
|
+ /* identity of who allocated this block */
|
|
+ u32 allocator;
|
|
+ /* resource name (for easier tracking on vc side) */
|
|
+ char name[VC_SM_RESOURCE_NAME];
|
|
+
|
|
+};
|
|
+
|
|
+/* Result of a requested memory allocation (VC->HOST) */
|
|
+struct vc_sm_alloc_result_t {
|
|
+ /* Transaction identifier */
|
|
+ u32 trans_id;
|
|
+
|
|
+ /* Resource handle */
|
|
+ u32 res_handle;
|
|
+ /* Pointer to resource buffer */
|
|
+ u32 res_mem;
|
|
+ /* Resource base size (bytes) */
|
|
+ u32 res_base_size;
|
|
+ /* Resource number */
|
|
+ u32 res_num;
|
|
+
|
|
+};
|
|
+
|
|
+/* Request to free a previously allocated memory (HOST->VC) */
|
|
+struct vc_sm_free_t {
|
|
+ /* Resource handle (returned from alloc) */
|
|
+ u32 res_handle;
|
|
+ /* Resource buffer (returned from alloc) */
|
|
+ u32 res_mem;
|
|
+
|
|
+};
|
|
+
|
|
+/* Request to lock a previously allocated memory (HOST->VC) */
|
|
+struct vc_sm_lock_unlock_t {
|
|
+ /* Resource handle (returned from alloc) */
|
|
+ u32 res_handle;
|
|
+ /* Resource buffer (returned from alloc) */
|
|
+ u32 res_mem;
|
|
+
|
|
+};
|
|
+
|
|
+/* Request to resize a previously allocated memory (HOST->VC) */
|
|
+struct vc_sm_resize_t {
|
|
+ /* Resource handle (returned from alloc) */
|
|
+ u32 res_handle;
|
|
+ /* Resource buffer (returned from alloc) */
|
|
+ u32 res_mem;
|
|
+ /* Resource *new* size requested (bytes) */
|
|
+ u32 res_new_size;
|
|
+
|
|
+};
|
|
+
|
|
+/* Result of a requested memory lock (VC->HOST) */
|
|
+struct vc_sm_lock_result_t {
|
|
+ /* Transaction identifier */
|
|
+ u32 trans_id;
|
|
+
|
|
+ /* Resource handle */
|
|
+ u32 res_handle;
|
|
+ /* Pointer to resource buffer */
|
|
+ u32 res_mem;
|
|
+ /*
|
|
+ * Pointer to former resource buffer if the memory
|
|
+ * was reallocated
|
|
+ */
|
|
+ u32 res_old_mem;
|
|
+
|
|
+};
|
|
+
|
|
+/* Generic result for a request (VC->HOST) */
|
|
+struct vc_sm_result_t {
|
|
+ /* Transaction identifier */
|
|
+ u32 trans_id;
|
|
+
|
|
+ s32 success;
|
|
+
|
|
+};
|
|
+
|
|
+/* Request to revert a previously applied action (HOST->VC) */
|
|
+struct vc_sm_action_clean_t {
|
|
+ /* Action of interest */
|
|
+ enum vc_sm_msg_type res_action;
|
|
+ /* Transaction identifier for the action of interest */
|
|
+ u32 action_trans_id;
|
|
+
|
|
+};
|
|
+
|
|
+/* Request to remove all data associated with a given allocator (HOST->VC) */
|
|
+struct vc_sm_free_all_t {
|
|
+ /* Allocator identifier */
|
|
+ u32 allocator;
|
|
+};
|
|
+
|
|
+/* Request to import memory (HOST->VC) */
|
|
+struct vc_sm_import {
|
|
+ /* type of memory to allocate */
|
|
+ enum vc_sm_alloc_type_t type;
|
|
+ /* pointer to the VC (ie physical) address of the allocated memory */
|
|
+ u32 addr;
|
|
+ /* size of buffer */
|
|
+ u32 size;
|
|
+ /* opaque handle returned in RELEASED messages */
|
|
+ u32 kernel_id;
|
|
+ /* Allocator identifier */
|
|
+ u32 allocator;
|
|
+ /* resource name (for easier tracking on vc side) */
|
|
+ char name[VC_SM_RESOURCE_NAME];
|
|
+};
|
|
+
|
|
+/* Result of a requested memory import (VC->HOST) */
|
|
+struct vc_sm_import_result {
|
|
+ /* Transaction identifier */
|
|
+ u32 trans_id;
|
|
+
|
|
+ /* Resource handle */
|
|
+ u32 res_handle;
|
|
+};
|
|
+
|
|
+/* Notification that VC has finished with an allocation (VC->HOST) */
|
|
+struct vc_sm_released {
|
|
+ /* cmd type / trans_id */
|
|
+ u32 cmd;
|
|
+
|
|
+ /* pointer to the VC (ie physical) address of the allocated memory */
|
|
+ u32 addr;
|
|
+ /* size of buffer */
|
|
+ u32 size;
|
|
+ /* opaque handle returned in RELEASED messages */
|
|
+ u32 kernel_id;
|
|
+ u32 vc_handle;
|
|
+};
|
|
+
|
|
+/*
|
|
+ * Client informing VC as to the protocol version it supports.
|
|
+ * >=2 requires the released callback, and supports VC asking for memory.
|
|
+ * Failure means that the firmware doesn't support this call, and therefore the
|
|
+ * client should either fail, or NOT rely on getting the released callback.
|
|
+ */
|
|
+struct vc_sm_version {
|
|
+ u32 version;
|
|
+};
|
|
+
|
|
+/* Request FROM VideoCore for some memory */
|
|
+struct vc_sm_vc_mem_request {
|
|
+ /* cmd type */
|
|
+ u32 cmd;
|
|
+
|
|
+ /* trans_id (from VPU) */
|
|
+ u32 trans_id;
|
|
+ /* size of buffer */
|
|
+ u32 size;
|
|
+ /* alignment of buffer */
|
|
+ u32 align;
|
|
+ /* resource name (for easier tracking) */
|
|
+ char name[VC_SM_RESOURCE_NAME];
|
|
+};
|
|
+
|
|
+/* Response from the kernel to provide the VPU with some memory */
|
|
+struct vc_sm_vc_mem_request_result {
|
|
+ /* Transaction identifier for the VPU */
|
|
+ u32 trans_id;
|
|
+ /* pointer to the physical address of the allocated memory */
|
|
+ u32 addr;
|
|
+ /* opaque handle returned in RELEASED messages */
|
|
+ u32 kernel_id;
|
|
+};
|
|
+
|
|
+/* Union of ALL messages */
|
|
+union vc_sm_msg_union_t {
|
|
+ struct vc_sm_alloc_t alloc;
|
|
+ struct vc_sm_alloc_result_t alloc_result;
|
|
+ struct vc_sm_free_t free;
|
|
+ struct vc_sm_lock_unlock_t lock_unlock;
|
|
+ struct vc_sm_action_clean_t action_clean;
|
|
+ struct vc_sm_resize_t resize;
|
|
+ struct vc_sm_lock_result_t lock_result;
|
|
+ struct vc_sm_result_t result;
|
|
+ struct vc_sm_free_all_t free_all;
|
|
+ struct vc_sm_import import;
|
|
+ struct vc_sm_import_result import_result;
|
|
+ struct vc_sm_version version;
|
|
+ struct vc_sm_released released;
|
|
+ struct vc_sm_vc_mem_request vc_request;
|
|
+ struct vc_sm_vc_mem_request_result vc_request_result;
|
|
+};
|
|
+
|
|
+#endif /* __VC_SM_DEFS_H__INCLUDED__ */
|
|
--- /dev/null
|
|
+++ b/drivers/staging/vc04_services/vc-sm-cma/vc_sm_knl.h
|
|
@@ -0,0 +1,28 @@
|
|
+/* SPDX-License-Identifier: GPL-2.0 */
|
|
+
|
|
+/*
|
|
+ * VideoCore Shared Memory CMA allocator
|
|
+ *
|
|
+ * Copyright: 2018, Raspberry Pi (Trading) Ltd
|
|
+ *
|
|
+ * Based on vc_sm_defs.h from the vmcs_sm driver Copyright Broadcom Corporation.
|
|
+ *
|
|
+ */
|
|
+
|
|
+#ifndef __VC_SM_KNL_H__INCLUDED__
|
|
+#define __VC_SM_KNL_H__INCLUDED__
|
|
+
|
|
+#if !defined(__KERNEL__)
|
|
+#error "This interface is for kernel use only..."
|
|
+#endif
|
|
+
|
|
+/* Free a previously allocated or imported shared memory handle and block. */
|
|
+int vc_sm_cma_free(int handle);
|
|
+
|
|
+/* Get an internal resource handle mapped from the external one. */
|
|
+int vc_sm_cma_int_handle(int handle);
|
|
+
|
|
+/* Import a block of memory into the GPU space. */
|
|
+int vc_sm_cma_import_dmabuf(struct dma_buf *dmabuf, int *handle);
|
|
+
|
|
+#endif /* __VC_SM_KNL_H__INCLUDED__ */
|