> > On 01 Jun 2016, at 14:41, Jens Wiklander <jens.wiklander@xxxxxxxxxx> wrote: > > Initial patch for generic TEE subsystem. > This subsystem provides: > * Registration/un-registration of TEE drivers. > * Shared memory between normal world and secure world. > * Ioctl interface for interaction with user space. > * Sysfs implementation_id of TEE driver > > A TEE (Trusted Execution Environment) driver is a driver that interfaces > with a trusted OS running in some secure environment, for example, > TrustZone on ARM cpus, or a separate secure co-processor etc. > > The TEE subsystem can serve a TEE driver for a Global Platform compliant > TEE, but it's not limited to only Global Platform TEEs. > > This patch builds on other similar implementations trying to solve > the same problem: > * "optee_linuxdriver" by among others > Jean-michel DELORME<jean-michel.delorme@xxxxxx> and > Emmanuel MICHEL <emmanuel.michel@xxxxxx> > * "Generic TrustZone Driver" by Javier González <javier@xxxxxxxxxxx> > > Acked-by: Andreas Dannenberg <dannenberg@xxxxxx> > Signed-off-by: Jens Wiklander <jens.wiklander@xxxxxxxxxx> > --- > Documentation/ioctl/ioctl-number.txt | 1 + > MAINTAINERS | 7 + > drivers/Kconfig | 2 + > drivers/Makefile | 1 + > drivers/tee/Kconfig | 9 + > drivers/tee/Makefile | 3 + > drivers/tee/tee.c | 877 +++++++++++++++++++++++++++++++++++ > drivers/tee/tee_private.h | 125 +++++ > drivers/tee/tee_shm.c | 347 ++++++++++++++ > drivers/tee/tee_shm_pool.c | 155 +++++++ > include/linux/tee_drv.h | 273 +++++++++++ > include/uapi/linux/tee.h | 400 ++++++++++++++++ > 12 files changed, 2200 insertions(+) > create mode 100644 drivers/tee/Kconfig > create mode 100644 drivers/tee/Makefile > create mode 100644 drivers/tee/tee.c > create mode 100644 drivers/tee/tee_private.h > create mode 100644 drivers/tee/tee_shm.c > create mode 100644 drivers/tee/tee_shm_pool.c > create mode 100644 include/linux/tee_drv.h > create mode 100644 include/uapi/linux/tee.h > > diff --git a/Documentation/ioctl/ioctl-number.txt b/Documentation/ioctl/ioctl-number.txt > index 9369d3b..ac52b6c 100644 > --- a/Documentation/ioctl/ioctl-number.txt > +++ b/Documentation/ioctl/ioctl-number.txt > @@ -307,6 +307,7 @@ Code Seq#(hex) Include File Comments > 0xA3 80-8F Port ACL in development: > <mailto:tlewis@xxxxxxxxxxxxxx> > 0xA3 90-9F linux/dtlk.h > +0xA4 00-1F uapi/linux/tee.h Generic TEE subsystem > 0xAA 00-3F linux/uapi/linux/userfaultfd.h > 0xAB 00-1F linux/nbd.h > 0xAC 00-1F linux/raw.h > diff --git a/MAINTAINERS b/MAINTAINERS > index 7304d2e..802ccf9 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -10022,6 +10022,13 @@ F: drivers/hwtracing/stm/ > F: include/linux/stm.h > F: include/uapi/linux/stm.h > > +TEE SUBSYSTEM > +M: Jens Wiklander <jens.wiklander@xxxxxxxxxx> > +S: Maintained > +F: include/linux/tee_drv.h > +F: include/uapi/linux/tee.h > +F: drivers/tee/ > + > THUNDERBOLT DRIVER > M: Andreas Noever <andreas.noever@xxxxxxxxx> > S: Maintained > diff --git a/drivers/Kconfig b/drivers/Kconfig > index e1e2066..de581c1 100644 > --- a/drivers/Kconfig > +++ b/drivers/Kconfig > @@ -202,4 +202,6 @@ source "drivers/hwtracing/intel_th/Kconfig" > > source "drivers/fpga/Kconfig" > > +source "drivers/tee/Kconfig" > + > endmenu > diff --git a/drivers/Makefile b/drivers/Makefile > index 0b6f3d6..cd7c40f 100644 > --- a/drivers/Makefile > +++ b/drivers/Makefile > @@ -173,3 +173,4 @@ obj-$(CONFIG_STM) += hwtracing/stm/ > obj-$(CONFIG_ANDROID) += android/ > obj-$(CONFIG_NVMEM) += nvmem/ > obj-$(CONFIG_FPGA) += fpga/ > +obj-$(CONFIG_TEE) += tee/ > diff --git a/drivers/tee/Kconfig b/drivers/tee/Kconfig > new file mode 100644 > index 0000000..f3ba154 > --- /dev/null > +++ b/drivers/tee/Kconfig > @@ -0,0 +1,9 @@ > +# Generic Trusted Execution Environment Configuration > +config TEE > + bool "Trusted Execution Environment support" > + default n > + select DMA_SHARED_BUFFER > + select GENERIC_ALLOCATOR > + help > + This implements a generic interface towards a Trusted Execution > + Environment (TEE). > diff --git a/drivers/tee/Makefile b/drivers/tee/Makefile > new file mode 100644 > index 0000000..60d2dab > --- /dev/null > +++ b/drivers/tee/Makefile > @@ -0,0 +1,3 @@ > +obj-y += tee.o > +obj-y += tee_shm.o > +obj-y += tee_shm_pool.o > diff --git a/drivers/tee/tee.c b/drivers/tee/tee.c > new file mode 100644 > index 0000000..119e18e > --- /dev/null > +++ b/drivers/tee/tee.c > @@ -0,0 +1,877 @@ > +/* > + * Copyright (c) 2015-2016, Linaro Limited > + * > + * This software is licensed under the terms of the GNU General Public > + * License version 2, as published by the Free Software Foundation, and > + * may be copied, distributed, and modified under those terms. > + * > + * 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/cdev.h> > +#include <linux/device.h> > +#include <linux/fs.h> > +#include <linux/idr.h> > +#include <linux/slab.h> > +#include <linux/tee_drv.h> > +#include <linux/uaccess.h> > +#include "tee_private.h" > + > +#define TEE_NUM_DEVICES 32 > + > +#define TEE_IOCTL_PARAM_SIZE(x) (sizeof(struct tee_param) * (x)) > + > +/* > + * Unprivileged devices in the in the lower half range and privileged > + * devices in the upper half range. > + */ > +static DECLARE_BITMAP(dev_mask, TEE_NUM_DEVICES); > +static DEFINE_SPINLOCK(driver_lock); > + > +static struct class *tee_class; > +static dev_t tee_devt; > + > +static int tee_open(struct inode *inode, struct file *filp) > +{ > + int rc; > + struct tee_device *teedev; > + struct tee_context *ctx; > + > + teedev = container_of(inode->i_cdev, struct tee_device, cdev); > + if (!tee_device_get(teedev)) > + return -EINVAL; > + > + ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); > + if (!ctx) { > + rc = -ENOMEM; > + goto err; > + } > + > + ctx->teedev = teedev; > + filp->private_data = ctx; > + rc = teedev->desc->ops->open(ctx); > + if (rc) > + goto err; > + > + return 0; > +err: > + kfree(ctx); > + tee_device_put(teedev); > + return rc; > +} > + > +static int tee_release(struct inode *inode, struct file *filp) > +{ > + struct tee_context *ctx = filp->private_data; > + struct tee_device *teedev = ctx->teedev; > + > + ctx->teedev->desc->ops->release(ctx); > + kfree(ctx); > + tee_device_put(teedev); > + return 0; > +} > + > +static int tee_ioctl_version(struct tee_context *ctx, > + struct tee_ioctl_version_data __user *uvers) > +{ > + struct tee_ioctl_version_data vers; > + > + ctx->teedev->desc->ops->get_version(ctx->teedev, &vers); > + if (copy_to_user(uvers, &vers, sizeof(vers))) > + return -EFAULT; > + return 0; > +} > + > +static int tee_ioctl_shm_alloc(struct tee_context *ctx, > + struct tee_ioctl_shm_alloc_data __user *udata) > +{ > + long ret; > + struct tee_ioctl_shm_alloc_data data; > + struct tee_shm *shm; > + > + if (copy_from_user(&data, udata, sizeof(data))) > + return -EFAULT; > + > + /* Currently no input flags are supported */ > + if (data.flags) > + return -EINVAL; > + > + data.id = -1; > + > + shm = tee_shm_alloc(ctx->teedev, data.size, > + TEE_SHM_MAPPED | TEE_SHM_DMA_BUF); > + if (IS_ERR(shm)) > + return PTR_ERR(shm); > + > + data.id = shm->id; > + data.flags = shm->flags; > + data.size = shm->size; > + > + if (copy_to_user(udata, &data, sizeof(data))) > + ret = -EFAULT; > + else > + ret = tee_shm_get_fd(shm); > + > + /* > + * When user space closes the file descriptor the shared memory > + * should be freed or if tee_shm_get_fd() failed then it will > + * be freed immediately. > + */ > + tee_shm_put(shm); > + return ret; > +} > + > +static int params_from_user(struct tee_context *ctx, struct tee_param *params, > + size_t num_params, > + struct tee_ioctl_param __user *uparams) > +{ > + size_t n; > + > + for (n = 0; n < num_params; n++) { > + struct tee_shm *shm; > + struct tee_ioctl_param ip; > + > + if (copy_from_user(&ip, uparams + n, sizeof(ip))) > + return -EFAULT; > + > + /* All unused attribute bits has to be zero */ > + if (ip.attr & ~TEE_IOCTL_PARAM_ATTR_TYPE_MASK) > + return -EINVAL; > + > + params[n].attr = ip.attr; > + switch (ip.attr) { > + case TEE_IOCTL_PARAM_ATTR_TYPE_NONE: > + case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT: > + break; > + case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT: > + case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INOUT: > + params[n].u.value.a = ip.u.value.a; > + params[n].u.value.b = ip.u.value.b; > + params[n].u.value.c = ip.u.value.c; > + break; > + case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT: > + case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_OUTPUT: > + case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT: > + /* > + * If we fail to get a pointer to a shared memory > + * object (and increase the ref count) from an > + * identifier we return an error. All pointers that > + * has been added in params have an increased ref > + * count. It's the callers responibility to do > + * tee_shm_put() on all resolved pointers. > + */ > + shm = tee_shm_get_from_id(ctx->teedev, > + ip.u.memref.shm_id); > + if (IS_ERR(shm)) > + return PTR_ERR(shm); > + > + params[n].u.memref.shm_offs = ip.u.memref.shm_offs; > + params[n].u.memref.size = ip.u.memref.size; > + params[n].u.memref.shm = shm; > + break; > + default: > + /* Unknown attribute */ > + return -EINVAL; > + } > + } > + return 0; > +} > + > +static int params_to_user(struct tee_ioctl_param __user *uparams, > + size_t num_params, struct tee_param *params) > +{ > + size_t n; > + > + for (n = 0; n < num_params; n++) { > + struct tee_ioctl_param __user *up = uparams + n; > + struct tee_param *p = params + n; > + > + switch (p->attr) { > + case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT: > + case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INOUT: > + if (put_user(p->u.value.a, &up->u.value.a) || > + put_user(p->u.value.b, &up->u.value.b) || > + put_user(p->u.value.c, &up->u.value.c)) > + return -EFAULT; > + break; > + case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_OUTPUT: > + case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT: > + if (put_user((u64)p->u.memref.size, &up->u.memref.size)) > + return -EFAULT; > + default: > + break; > + } > + } > + return 0; > +} > + > +static bool param_is_memref(struct tee_param *param) > +{ > + switch (param->attr & TEE_IOCTL_PARAM_ATTR_TYPE_MASK) { > + case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT: > + case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_OUTPUT: > + case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT: > + return true; > + default: > + return false; > + } > +} > + > +static int tee_ioctl_open_session(struct tee_context *ctx, > + struct tee_ioctl_buf_data __user *ubuf) > +{ > + int rc; > + size_t n; > + struct tee_ioctl_buf_data buf; > + struct tee_ioctl_open_session_arg __user *uarg; > + struct tee_ioctl_open_session_arg arg; > + struct tee_ioctl_param __user *uparams = NULL; > + struct tee_param *params = NULL; > + bool have_session = false; > + > + if (!ctx->teedev->desc->ops->open_session) > + return -EINVAL; > + > + if (copy_from_user(&buf, ubuf, sizeof(buf))) > + return -EFAULT; > + > + if (buf.buf_len > TEE_MAX_ARG_SIZE || > + buf.buf_len < sizeof(struct tee_ioctl_open_session_arg)) > + return -EINVAL; > + > + uarg = (struct tee_ioctl_open_session_arg __user *)(unsigned long) > + buf.buf_ptr; > + rc = copy_from_user(&arg, uarg, sizeof(arg)); > + if (rc) > + return rc; > + > + if (sizeof(arg) + TEE_IOCTL_PARAM_SIZE(arg.num_params) != buf.buf_len) > + return -EINVAL; > + > + if (arg.num_params) { > + params = kcalloc(arg.num_params, sizeof(struct tee_param), > + GFP_KERNEL); > + if (!params) > + return -ENOMEM; > + uparams = (struct tee_ioctl_param __user *)(uarg + 1); > + rc = params_from_user(ctx, params, arg.num_params, uparams); > + if (rc) > + goto out; > + } > + > + rc = ctx->teedev->desc->ops->open_session(ctx, &arg, params); > + if (rc) > + goto out; > + have_session = true; > + > + if (put_user(arg.session, &uarg->session) || > + put_user(arg.ret, &uarg->ret) || > + put_user(arg.ret_origin, &uarg->ret_origin)) { > + rc = -EFAULT; > + goto out; > + } > + rc = params_to_user(uparams, arg.num_params, params); > +out: > + /* > + * If we've succeeded to open the session but failed to communicate > + * it back to user space, close the session again to avoid leakage. > + */ > + if (rc && have_session && ctx->teedev->desc->ops->close_session) > + ctx->teedev->desc->ops->close_session(ctx, arg.session); > + > + if (params) { > + /* Decrease ref count for all valid shared memory pointers */ > + for (n = 0; n < arg.num_params; n++) > + if (param_is_memref(params + n) && > + params[n].u.memref.shm) > + tee_shm_put(params[n].u.memref.shm); > + kfree(params); > + } > + > + return rc; > +} > + > +static int tee_ioctl_invoke(struct tee_context *ctx, > + struct tee_ioctl_buf_data __user *ubuf) > +{ > + int rc; > + size_t n; > + struct tee_ioctl_buf_data buf; > + struct tee_ioctl_invoke_arg __user *uarg; > + struct tee_ioctl_invoke_arg arg; > + struct tee_ioctl_param __user *uparams = NULL; > + struct tee_param *params = NULL; > + > + if (!ctx->teedev->desc->ops->invoke_func) > + return -EINVAL; > + > + rc = copy_from_user(&buf, ubuf, sizeof(buf)); > + if (rc) > + return rc; > + > + if (buf.buf_len > TEE_MAX_ARG_SIZE || > + buf.buf_len < sizeof(struct tee_ioctl_invoke_arg)) > + return -EINVAL; > + > + uarg = (struct tee_ioctl_invoke_arg __user *)(unsigned long)buf.buf_ptr; > + if (copy_from_user(&arg, uarg, sizeof(arg))) > + return -EFAULT; > + > + if (sizeof(arg) + TEE_IOCTL_PARAM_SIZE(arg.num_params) != buf.buf_len) > + return -EINVAL; > + > + if (arg.num_params) { > + params = kcalloc(arg.num_params, sizeof(struct tee_param), > + GFP_KERNEL); > + if (!params) > + return -ENOMEM; > + uparams = (struct tee_ioctl_param __user *)(uarg + 1); > + rc = params_from_user(ctx, params, arg.num_params, uparams); > + if (rc) > + goto out; > + } > + > + rc = ctx->teedev->desc->ops->invoke_func(ctx, &arg, params); > + if (rc) > + goto out; > + > + if (put_user(arg.ret, &uarg->ret) || > + put_user(arg.ret_origin, &uarg->ret_origin)) { > + rc = -EFAULT; > + goto out; > + } > + rc = params_to_user(uparams, arg.num_params, params); > +out: > + if (params) { > + /* Decrease ref count for all valid shared memory pointers */ > + for (n = 0; n < arg.num_params; n++) > + if (param_is_memref(params + n) && > + params[n].u.memref.shm) > + tee_shm_put(params[n].u.memref.shm); > + kfree(params); > + } > + return rc; > +} > + > +static int tee_ioctl_cancel(struct tee_context *ctx, > + struct tee_ioctl_cancel_arg __user *uarg) > +{ > + struct tee_ioctl_cancel_arg arg; > + > + if (!ctx->teedev->desc->ops->cancel_req) > + return -EINVAL; > + > + if (copy_from_user(&arg, uarg, sizeof(arg))) > + return -EFAULT; > + > + return ctx->teedev->desc->ops->cancel_req(ctx, arg.cancel_id, > + arg.session); > +} > + > +static int tee_ioctl_close_session(struct tee_context *ctx, > + struct tee_ioctl_close_session_arg __user *uarg) > +{ > + struct tee_ioctl_close_session_arg arg; > + > + if (!ctx->teedev->desc->ops->close_session) > + return -EINVAL; > + > + if (copy_from_user(&arg, uarg, sizeof(arg))) > + return -EFAULT; > + > + return ctx->teedev->desc->ops->close_session(ctx, arg.session); > +} > + > +static int params_to_supp(struct tee_context *ctx, > + struct tee_ioctl_param __user *uparams, > + size_t num_params, struct tee_param *params) > +{ > + size_t n; > + > + for (n = 0; n < num_params; n++) { > + struct tee_ioctl_param ip; > + struct tee_param *p = params + n; > + > + ip.attr = p->attr & TEE_IOCTL_PARAM_ATTR_TYPE_MASK; > + switch (p->attr) { > + case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT: > + case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INOUT: > + ip.u.value.a = p->u.value.a; > + ip.u.value.b = p->u.value.b; > + ip.u.value.c = p->u.value.c; > + break; > + case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT: > + case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_OUTPUT: > + case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT: > + ip.u.memref.size = p->u.memref.size; > + if (!p->u.memref.shm) { > + ip.u.memref.shm_offs = 0; > + ip.u.memref.shm_id = -1; > + break; > + } > + ip.u.memref.shm_offs = p->u.memref.shm_offs; > + ip.u.memref.shm_id = p->u.memref.shm->id; > + break; > + default: > + memset(&ip.u, 0, sizeof(ip.u)); > + break; > + } > + > + if (copy_to_user(uparams + n, &ip, sizeof(ip))) > + return -EFAULT; > + } > + > + return 0; > +} > + > +static int tee_ioctl_supp_recv(struct tee_context *ctx, > + struct tee_ioctl_buf_data __user *ubuf) > +{ > + int rc; > + struct tee_ioctl_buf_data buf; > + struct tee_iocl_supp_recv_arg __user *uarg; > + struct tee_param *params; > + struct tee_ioctl_param __user *uparams; > + u32 num_params; > + u32 func; > + > + if (!ctx->teedev->desc->ops->supp_recv) > + return -EINVAL; > + > + if (copy_from_user(&buf, ubuf, sizeof(buf))) > + return -EFAULT; > + > + if (buf.buf_len > TEE_MAX_ARG_SIZE || > + buf.buf_len < sizeof(struct tee_iocl_supp_recv_arg)) > + return -EINVAL; > + > + uarg = (struct tee_iocl_supp_recv_arg __user *)(unsigned long) > + buf.buf_ptr; > + if (get_user(num_params, &uarg->num_params)) > + return -EFAULT; > + > + if (sizeof(*uarg) + TEE_IOCTL_PARAM_SIZE(num_params) != buf.buf_len) > + return -EINVAL; > + > + params = kcalloc(num_params, sizeof(struct tee_param), GFP_KERNEL); > + if (!params) > + return -ENOMEM; > + > + rc = ctx->teedev->desc->ops->supp_recv(ctx, &func, &num_params, params); > + if (rc) > + goto out; > + > + if (put_user(func, &uarg->func) || > + put_user(num_params, &uarg->num_params)) { > + rc = -EFAULT; > + goto out; > + } > + > + uparams = (struct tee_ioctl_param __user *)(uarg + 1); > + rc = params_to_supp(ctx, uparams, num_params, params); > +out: > + kfree(params); > + return rc; > +} > + > +static int params_from_supp(struct tee_param *params, size_t num_params, > + struct tee_ioctl_param __user *uparams) > +{ > + size_t n; > + > + for (n = 0; n < num_params; n++) { > + struct tee_param *p = params + n; > + struct tee_ioctl_param ip; > + > + if (copy_from_user(&ip, uparams + n, sizeof(ip))) > + return -EFAULT; > + > + /* All unused attribute bits has to be zero */ > + if (ip.attr & ~TEE_IOCTL_PARAM_ATTR_TYPE_MASK) > + return -EINVAL; > + > + p->attr = ip.attr; > + switch (ip.attr) { > + case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT: > + case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INOUT: > + /* Only out and in/out values can be updated */ > + p->u.value.a = ip.u.value.a; > + p->u.value.b = ip.u.value.b; > + p->u.value.c = ip.u.value.c; > + break; > + case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_OUTPUT: > + case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT: > + /* > + * Only the size of the memref can be updated. > + * Since we don't have access to the original > + * parameters here, only store the supplied size. > + * The driver will copy the updated size into the > + * original parameters. > + */ > + p->u.memref.shm = NULL; > + p->u.memref.shm_offs = 0; > + p->u.memref.size = ip.u.memref.size; > + break; > + default: > + memset(&p->u, 0, sizeof(p->u)); > + break; > + } > + } > + return 0; > +} > + > +static int tee_ioctl_supp_send(struct tee_context *ctx, > + struct tee_ioctl_buf_data __user *ubuf) > +{ > + long rc; > + struct tee_ioctl_buf_data buf; > + struct tee_iocl_supp_send_arg __user *uarg; > + struct tee_param *params; > + struct tee_ioctl_param __user *uparams; > + u32 num_params; > + u32 ret; > + > + /* Not valid for this driver */ > + if (!ctx->teedev->desc->ops->supp_send) > + return -EINVAL; > + > + if (copy_from_user(&buf, ubuf, sizeof(buf))) > + return -EFAULT; > + > + if (buf.buf_len > TEE_MAX_ARG_SIZE || > + buf.buf_len < sizeof(struct tee_iocl_supp_send_arg)) > + return -EINVAL; > + > + uarg = (struct tee_iocl_supp_send_arg __user *)(unsigned long) > + buf.buf_ptr; > + if (get_user(ret, &uarg->ret) || > + get_user(num_params, &uarg->num_params)) > + return -EFAULT; > + > + if (sizeof(*uarg) + TEE_IOCTL_PARAM_SIZE(num_params) > buf.buf_len) > + return -EINVAL; > + > + params = kcalloc(num_params, sizeof(struct tee_param), GFP_KERNEL); > + if (!params) > + return -ENOMEM; > + > + uparams = (struct tee_ioctl_param __user *)(uarg + 1); > + rc = params_from_supp(params, num_params, uparams); > + if (rc) > + goto out; > + > + rc = ctx->teedev->desc->ops->supp_send(ctx, ret, num_params, params); > +out: > + kfree(params); > + return rc; > +} > + > +static long tee_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) > +{ > + struct tee_context *ctx = filp->private_data; > + void __user *uarg = (void __user *)arg; > + > + switch (cmd) { > + case TEE_IOC_VERSION: > + return tee_ioctl_version(ctx, uarg); > + case TEE_IOC_SHM_ALLOC: > + return tee_ioctl_shm_alloc(ctx, uarg); > + case TEE_IOC_OPEN_SESSION: > + return tee_ioctl_open_session(ctx, uarg); > + case TEE_IOC_INVOKE: > + return tee_ioctl_invoke(ctx, uarg); > + case TEE_IOC_CANCEL: > + return tee_ioctl_cancel(ctx, uarg); > + case TEE_IOC_CLOSE_SESSION: > + return tee_ioctl_close_session(ctx, uarg); > + case TEE_IOC_SUPPL_RECV: > + return tee_ioctl_supp_recv(ctx, uarg); > + case TEE_IOC_SUPPL_SEND: > + return tee_ioctl_supp_send(ctx, uarg); > + default: > + return -EINVAL; > + } > +} > + > +static const struct file_operations tee_fops = { > + .open = tee_open, > + .release = tee_release, > + .unlocked_ioctl = tee_ioctl, > + .compat_ioctl = tee_ioctl, > +}; > + > +static void tee_release_device(struct device *dev) > +{ > + struct tee_device *teedev = container_of(dev, struct tee_device, dev); > + > + spin_lock(&driver_lock); > + clear_bit(teedev->id, dev_mask); > + spin_unlock(&driver_lock); > + mutex_destroy(&teedev->mutex); > + kfree(teedev); > +} > + > +/** > + * tee_device_alloc() - Allocate a new struct tee_device instance > + * @teedesc: Descriptor for this driver > + * @dev: Parent device for this device > + * @pool: Shared memory pool, NULL if not used > + * @driver_data: Private driver data for this device > + * > + * Allocates a new struct tee_device instance. The device is > + * removed by tee_device_unregister(). > + * > + * @returns a pointer to a 'struct tee_device' or an ERR_PTR on failure > + */ > +struct tee_device *tee_device_alloc(const struct tee_desc *teedesc, > + struct device *dev, > + struct tee_shm_pool *pool, > + void *driver_data) > +{ > + struct tee_device *teedev; > + void *ret; > + int rc; > + int offs = 0; > + > + if (!teedesc || !teedesc->name || !teedesc->ops || > + !teedesc->ops->get_version || !teedesc->ops->open || > + !teedesc->ops->release || !dev || !pool) > + return ERR_PTR(-EINVAL); > + > + teedev = kzalloc(sizeof(*teedev), GFP_KERNEL); > + if (!teedev) { > + ret = ERR_PTR(-ENOMEM); > + goto err; > + } > + > + if (teedesc->flags & TEE_DESC_PRIVILEGED) > + offs = TEE_NUM_DEVICES / 2; > + > + spin_lock(&driver_lock); > + teedev->id = find_next_zero_bit(dev_mask, TEE_NUM_DEVICES, offs); > + if (teedev->id < TEE_NUM_DEVICES) > + set_bit(teedev->id, dev_mask); > + spin_unlock(&driver_lock); > + > + if (teedev->id >= TEE_NUM_DEVICES) { > + ret = ERR_PTR(-ENOMEM); > + goto err; > + } > + > + snprintf(teedev->name, sizeof(teedev->name), "tee%s%d", > + teedesc->flags & TEE_DESC_PRIVILEGED ? "priv" : "", > + teedev->id - offs); > + > + teedev->dev.class = tee_class; > + teedev->dev.release = tee_release_device; > + teedev->dev.parent = dev; > + teedev->dev.devt = MKDEV(MAJOR(tee_devt), teedev->id); > + > + rc = dev_set_name(&teedev->dev, "%s", teedev->name); > + if (rc) { > + ret = ERR_PTR(rc); > + goto err; > + } > + > + cdev_init(&teedev->cdev, &tee_fops); > + teedev->cdev.owner = teedesc->owner; > + teedev->cdev.kobj.parent = &teedev->dev.kobj; > + > + dev_set_drvdata(&teedev->dev, driver_data); > + device_initialize(&teedev->dev); > + > + /* 1 as tee_device_unregister() does one final tee_device_put() */ > + teedev->num_users = 1; > + init_completion(&teedev->c_no_users); > + mutex_init(&teedev->mutex); > + > + teedev->desc = teedesc; > + teedev->pool = pool; > + > + return teedev; > +err: > + dev_err(dev, "could not register %s driver\n", > + teedesc->flags & TEE_DESC_PRIVILEGED ? "privileged" : "client"); > + if (teedev && teedev->id < TEE_NUM_DEVICES) { > + spin_lock(&driver_lock); > + clear_bit(teedev->id, dev_mask); > + spin_unlock(&driver_lock); > + } > + kfree(teedev); > + return ret; > +} > +EXPORT_SYMBOL_GPL(tee_device_alloc); > + > +static ssize_t implementation_id_show(struct device *dev, > + struct device_attribute *attr, char *buf) > +{ > + struct tee_device *teedev = container_of(dev, struct tee_device, dev); > + struct tee_ioctl_version_data vers; > + > + teedev->desc->ops->get_version(teedev, &vers); > + return scnprintf(buf, PAGE_SIZE, "%d\n", vers.impl_id); > +} > +static DEVICE_ATTR_RO(implementation_id); > + > +static struct attribute *tee_dev_attrs[] = { > + &dev_attr_implementation_id.attr, > + NULL > +}; > + > +static const struct attribute_group tee_dev_group = { > + .attrs = tee_dev_attrs, > +}; > + > +/** > + * tee_device_register() - Registers a TEE device > + * @teedev: Device to register > + * > + * tee_device_unregister() need to be called to remove the @teedev if > + * this function fails. > + * > + * @returns < 0 on failure > + */ > +int tee_device_register(struct tee_device *teedev) > +{ > + int rc; > + > + /* > + * If the teedev already is registered, don't do it again. It's > + * obviously an error to try to register twice, but if we return > + * an error we'll force the driver to remove the teedev. > + */ > + if (teedev->flags & TEE_DEVICE_FLAG_REGISTERED) { > + dev_err(&teedev->dev, "attempt to register twice\n"); > + return 0; > + } > + > + rc = cdev_add(&teedev->cdev, teedev->dev.devt, 1); > + if (rc) { > + dev_err(&teedev->dev, > + "unable to cdev_add() %s, major %d, minor %d, err=%d\n", > + teedev->name, MAJOR(teedev->dev.devt), > + MINOR(teedev->dev.devt), rc); > + return rc; > + } > + > + rc = device_add(&teedev->dev); > + if (rc) { > + dev_err(&teedev->dev, > + "unable to device_add() %s, major %d, minor %d, err=%d\n", > + teedev->name, MAJOR(teedev->dev.devt), > + MINOR(teedev->dev.devt), rc); > + goto err_device_add; > + } > + > + rc = sysfs_create_group(&teedev->dev.kobj, &tee_dev_group); > + if (rc) { > + dev_err(&teedev->dev, > + "failed to create sysfs attributes, err=%d\n", rc); > + goto err_sysfs_create_group; > + } > + > + teedev->flags |= TEE_DEVICE_FLAG_REGISTERED; > + return 0; > + > +err_sysfs_create_group: > + device_del(&teedev->dev); > +err_device_add: > + cdev_del(&teedev->cdev); > + return rc; > +} > +EXPORT_SYMBOL_GPL(tee_device_register); > + > +void tee_device_put(struct tee_device *teedev) > +{ > + mutex_lock(&teedev->mutex); > + /* Shouldn't put in this state */ > + if (!WARN_ON(!teedev->desc)) { > + teedev->num_users--; > + if (!teedev->num_users) { > + teedev->desc = NULL; > + complete(&teedev->c_no_users); > + } > + } > + mutex_unlock(&teedev->mutex); > +} > + > +bool tee_device_get(struct tee_device *teedev) > +{ > + mutex_lock(&teedev->mutex); > + if (!teedev->desc) { > + mutex_unlock(&teedev->mutex); > + return false; > + } > + teedev->num_users++; > + mutex_unlock(&teedev->mutex); > + return true; > +} > + > +/** > + * tee_device_unregister() - Removes a TEE device > + * @teedev: Device to unregister > + * > + * This function should be called to remove the @teedev even if > + * tee_device_register() hasn't been called yet. Does nothing if > + * @teedev is NULL. > + */ > +void tee_device_unregister(struct tee_device *teedev) > +{ > + if (!teedev) > + return; > + > + if (teedev->flags & TEE_DEVICE_FLAG_REGISTERED) { > + sysfs_remove_group(&teedev->dev.kobj, &tee_dev_group); > + cdev_del(&teedev->cdev); > + device_del(&teedev->dev); > + } > + > + tee_device_put(teedev); > + wait_for_completion(&teedev->c_no_users); > + > + /* > + * No need to take a mutex any longer now since teedev->desc was > + * set to NULL before teedev->c_no_users was completed. > + */ > + > + teedev->pool = NULL; > + > + put_device(&teedev->dev); > +} > +EXPORT_SYMBOL_GPL(tee_device_unregister); > + > +/** > + * tee_get_drvdata() - Return driver_data pointer > + * @teedev: Device containing the driver_data pointer > + * @returns the driver_data pointer supplied to tee_register(). > + */ > +void *tee_get_drvdata(struct tee_device *teedev) > +{ > + return dev_get_drvdata(&teedev->dev); > +} > +EXPORT_SYMBOL_GPL(tee_get_drvdata); > + > +static int __init tee_init(void) > +{ > + int rc; > + > + tee_class = class_create(THIS_MODULE, "tee"); > + if (IS_ERR(tee_class)) { > + pr_err("couldn't create class\n"); > + return PTR_ERR(tee_class); > + } > + > + rc = alloc_chrdev_region(&tee_devt, 0, TEE_NUM_DEVICES, "tee"); > + if (rc < 0) { > + pr_err("failed to allocate char dev region\n"); > + class_destroy(tee_class); > + tee_class = NULL; > + } > + > + return rc; > +} > + > +subsys_initcall(tee_init); > diff --git a/drivers/tee/tee_private.h b/drivers/tee/tee_private.h > new file mode 100644 > index 0000000..549945a > --- /dev/null > +++ b/drivers/tee/tee_private.h > @@ -0,0 +1,125 @@ > +/* > + * Copyright (c) 2015-2016, Linaro Limited > + * > + * This software is licensed under the terms of the GNU General Public > + * License version 2, as published by the Free Software Foundation, and > + * may be copied, distributed, and modified under those terms. > + * > + * 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 TEE_PRIVATE_H > +#define TEE_PRIVATE_H > + > +#include <linux/cdev.h> > +#include <linux/completion.h> > +#include <linux/device.h> > +#include <linux/kref.h> > +#include <linux/mutex.h> > +#include <linux/types.h> > + > +struct tee_device; > + > +/** > + * struct tee_shm - shared memory object > + * @teedev: device used to allocate the object > + * @paddr: physical address of the shared memory > + * @kaddr: virtual address of the shared memory > + * @size: size of shared memory > + * @dmabuf: dmabuf used to for exporting to user space > + * @flags: defined by TEE_SHM_* in tee_drv.h > + * @id: unique id of a shared memory object on this device > + */ > +struct tee_shm { > + struct tee_device *teedev; > + phys_addr_t paddr; > + void *kaddr; > + size_t size; > + struct dma_buf *dmabuf; > + u32 flags; > + int id; > +}; > + > +struct tee_shm_pool_mgr; > + > +/** > + * struct tee_shm_pool_mgr_ops - shared memory pool manager operations > + * @alloc: called when allocating shared memory > + * @free: called when freeing shared memory > + */ > +struct tee_shm_pool_mgr_ops { > + int (*alloc)(struct tee_shm_pool_mgr *poolmgr, struct tee_shm *shm, > + size_t size); > + void (*free)(struct tee_shm_pool_mgr *poolmgr, struct tee_shm *shm); > +}; > + > +/** > + * struct tee_shm_pool_mgr - shared memory manager > + * @ops: operations > + * @private_data: private data for the shared memory manager > + */ > +struct tee_shm_pool_mgr { > + const struct tee_shm_pool_mgr_ops *ops; > + void *private_data; > +}; > + > +/** > + * struct tee_shm_pool - shared memory pool > + * @private_mgr: pool manager for shared memory only between kernel > + * and secure world > + * @dma_buf_mgr: pool manager for shared memory exported to user space > + * @destroy: called when destroying the pool > + * @private_data: private data for the pool > + */ > +struct tee_shm_pool { > + struct tee_shm_pool_mgr private_mgr; > + struct tee_shm_pool_mgr dma_buf_mgr; > + void (*destroy)(struct tee_shm_pool *pool); > + void *private_data; > +}; > + > +#define TEE_DEVICE_FLAG_REGISTERED 0x1 > +#define TEE_MAX_DEV_NAME_LEN 32 > + > +/** > + * struct tee_device - TEE Device representation > + * @name: name of device > + * @desc: description of device > + * @id: unique id of device > + * @flags: represented by TEE_DEVICE_FLAG_REGISTERED above > + * @dev: embedded basic device structure > + * @cdev: embedded cdev > + * @num_users: number of active users of this device > + * @c_no_user: completion used when unregistering the device > + * @mutex: mutex protecting @num_users and @idr > + * @idr: register of shared memory object allocated on this device > + * @pool: shared memory pool > + */ > +struct tee_device { > + char name[TEE_MAX_DEV_NAME_LEN]; > + const struct tee_desc *desc; > + int id; > + unsigned int flags; > + > + struct device dev; > + struct cdev cdev; > + > + size_t num_users; > + struct completion c_no_users; > + struct mutex mutex; /* protects num_users and idr */ > + > + struct idr idr; > + struct tee_shm_pool *pool; > +}; > + > +int tee_shm_init(void); > + > +int tee_shm_get_fd(struct tee_shm *shm); > + > +bool tee_device_get(struct tee_device *teedev); > +void tee_device_put(struct tee_device *teedev); > + > +#endif /*TEE_PRIVATE_H*/ > diff --git a/drivers/tee/tee_shm.c b/drivers/tee/tee_shm.c > new file mode 100644 > index 0000000..db911d0 > --- /dev/null > +++ b/drivers/tee/tee_shm.c > @@ -0,0 +1,347 @@ > +/* > + * Copyright (c) 2015-2016, Linaro Limited > + * > + * This software is licensed under the terms of the GNU General Public > + * License version 2, as published by the Free Software Foundation, and > + * may be copied, distributed, and modified under those terms. > + * > + * 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/device.h> > +#include <linux/dma-buf.h> > +#include <linux/fdtable.h> > +#include <linux/idr.h> > +#include <linux/sched.h> > +#include <linux/slab.h> > +#include <linux/tee_drv.h> > +#include "tee_private.h" > + > +static void tee_shm_release(struct tee_shm *shm) > +{ > + struct tee_device *teedev = shm->teedev; > + struct tee_shm_pool_mgr *poolm; > + > + mutex_lock(&teedev->mutex); > + idr_remove(&teedev->idr, shm->id); > + mutex_unlock(&teedev->mutex); > + > + if (shm->flags & TEE_SHM_DMA_BUF) > + poolm = &teedev->pool->dma_buf_mgr; > + else > + poolm = &teedev->pool->private_mgr; > + > + poolm->ops->free(poolm, shm); > + kfree(shm); > + > + tee_device_put(teedev); > +} > + > +static struct sg_table *tee_shm_op_map_dma_buf(struct dma_buf_attachment > + *attach, enum dma_data_direction dir) > +{ > + return NULL; > +} > + > +static void tee_shm_op_unmap_dma_buf(struct dma_buf_attachment *attach, > + struct sg_table *table, > + enum dma_data_direction dir) > +{ > +} > + > +static void tee_shm_op_release(struct dma_buf *dmabuf) > +{ > + struct tee_shm *shm = dmabuf->priv; > + > + tee_shm_release(shm); > +} > + > +static void *tee_shm_op_kmap_atomic(struct dma_buf *dmabuf, unsigned long pgnum) > +{ > + return NULL; > +} > + > +static void *tee_shm_op_kmap(struct dma_buf *dmabuf, unsigned long pgnum) > +{ > + return NULL; > +} > + > +static int tee_shm_op_mmap(struct dma_buf *dmabuf, struct vm_area_struct *vma) > +{ > + struct tee_shm *shm = dmabuf->priv; > + size_t size = vma->vm_end - vma->vm_start; > + > + return remap_pfn_range(vma, vma->vm_start, shm->paddr >> PAGE_SHIFT, > + size, vma->vm_page_prot); > +} > + > +static struct dma_buf_ops tee_shm_dma_buf_ops = { > + .map_dma_buf = tee_shm_op_map_dma_buf, > + .unmap_dma_buf = tee_shm_op_unmap_dma_buf, > + .release = tee_shm_op_release, > + .kmap_atomic = tee_shm_op_kmap_atomic, > + .kmap = tee_shm_op_kmap, > + .mmap = tee_shm_op_mmap, > +}; > + > +/** > + * tee_shm_alloc() - Allocate shared memory > + * @teedev: Driver that allocates the shared memory > + * @size: Requested size of shared memory > + * @flags: Flags setting properties for the requested shared memory. > + * > + * Memory allocated as global shared memory is automatically freed when the > + * TEE file pointer is closed. The @flags field uses the bits defined by > + * TEE_SHM_* above. TEE_SHM_MAPPED must currently always be set. If > + * TEE_SHM_DMA_BUF global shared memory will be allocated and associated > + * with a dma-buf handle, else driver private memory. > + * > + * @returns a pointer to 'struct tee_shm' > + */ > +struct tee_shm *tee_shm_alloc(struct tee_device *teedev, size_t size, u32 flags) > +{ > + struct tee_shm_pool_mgr *poolm = NULL; > + struct tee_shm *shm; > + void *ret; > + int rc; > + > + if (!(flags & TEE_SHM_MAPPED)) { > + dev_err(teedev->dev.parent, > + "only mapped allocations supported\n"); > + return ERR_PTR(-EINVAL); > + } > + > + if ((flags & ~(TEE_SHM_MAPPED | TEE_SHM_DMA_BUF))) { > + dev_err(teedev->dev.parent, "invalid shm flags 0x%x", flags); > + return ERR_PTR(-EINVAL); > + } > + > + if (!tee_device_get(teedev)) > + return ERR_PTR(-EINVAL); > + > + if (!teedev->pool) { > + /* teedev has been detached from driver */ > + ret = ERR_PTR(-EINVAL); > + goto err_dev_put; > + } > + > + shm = kzalloc(sizeof(*shm), GFP_KERNEL); > + if (!shm) { > + ret = ERR_PTR(-ENOMEM); > + goto err_dev_put; > + } > + > + shm->flags = flags; > + shm->teedev = teedev; > + if (flags & TEE_SHM_DMA_BUF) > + poolm = &teedev->pool->dma_buf_mgr; > + else > + poolm = &teedev->pool->private_mgr; > + > + rc = poolm->ops->alloc(poolm, shm, size); > + if (rc) { > + ret = ERR_PTR(rc); > + goto err_kfree; > + } > + > + mutex_lock(&teedev->mutex); > + shm->id = idr_alloc(&teedev->idr, shm, 1, 0, GFP_KERNEL); > + mutex_unlock(&teedev->mutex); > + if (shm->id < 0) { > + ret = ERR_PTR(shm->id); > + goto err_pool_free; > + } > + > + if (flags & TEE_SHM_DMA_BUF) { > + DEFINE_DMA_BUF_EXPORT_INFO(exp_info); > + > + exp_info.ops = &tee_shm_dma_buf_ops; > + exp_info.size = shm->size; > + exp_info.flags = O_RDWR; > + exp_info.priv = shm; > + > + shm->dmabuf = dma_buf_export(&exp_info); > + if (IS_ERR(shm->dmabuf)) { > + ret = ERR_CAST(shm->dmabuf); > + goto err_rem; > + } > + } > + > + return shm; > +err_rem: > + mutex_lock(&teedev->mutex); > + idr_remove(&teedev->idr, shm->id); > + mutex_unlock(&teedev->mutex); > +err_pool_free: > + poolm->ops->free(poolm, shm); > +err_kfree: > + kfree(shm); > +err_dev_put: > + tee_device_put(teedev); > + return ret; > +} > +EXPORT_SYMBOL_GPL(tee_shm_alloc); > + > +/** > + * tee_shm_get_fd() - Increase reference count and return file descriptor > + * @shm: Shared memory handle > + * @returns user space file descriptor to shared memory > + */ > +int tee_shm_get_fd(struct tee_shm *shm) > +{ > + u32 req_flags = TEE_SHM_MAPPED | TEE_SHM_DMA_BUF; > + int fd; > + > + if ((shm->flags & req_flags) != req_flags) > + return -EINVAL; > + > + fd = dma_buf_fd(shm->dmabuf, O_CLOEXEC); > + if (fd >= 0) > + get_dma_buf(shm->dmabuf); > + return fd; > +} > + > +/** > + * tee_shm_free() - Free shared memory > + * @shm: Handle to shared memory to free > + */ > +void tee_shm_free(struct tee_shm *shm) > +{ > + /* > + * dma_buf_put() decreases the dmabuf reference counter and will > + * call tee_shm_release() when the last reference is gone. > + * > + * In the case of driver private memory we call tee_shm_release > + * directly instead as it doesn't have a reference counter. > + */ > + if (shm->flags & TEE_SHM_DMA_BUF) > + dma_buf_put(shm->dmabuf); > + else > + tee_shm_release(shm); > +} > +EXPORT_SYMBOL_GPL(tee_shm_free); > + > +/** > + * tee_shm_va2pa() - Get physical address of a virtual address > + * @shm: Shared memory handle > + * @va: Virtual address to tranlsate > + * @pa: Returned physical address > + * @returns 0 on success and < 0 on failure > + */ > +int tee_shm_va2pa(struct tee_shm *shm, void *va, phys_addr_t *pa) > +{ > + /* Check that we're in the range of the shm */ > + if ((char *)va < (char *)shm->kaddr) > + return -EINVAL; > + if ((char *)va >= ((char *)shm->kaddr + shm->size)) > + return -EINVAL; > + > + return tee_shm_get_pa( > + shm, (unsigned long)va - (unsigned long)shm->kaddr, pa); > +} > +EXPORT_SYMBOL_GPL(tee_shm_va2pa); > + > +/** > + * tee_shm_pa2va() - Get virtual address of a physical address > + * @shm: Shared memory handle > + * @pa: Physical address to tranlsate > + * @va: Returned virtual address > + * @returns 0 on success and < 0 on failure > + */ > +int tee_shm_pa2va(struct tee_shm *shm, phys_addr_t pa, void **va) > +{ > + /* Check that we're in the range of the shm */ > + if (pa < shm->paddr) > + return -EINVAL; > + if (pa >= (shm->paddr + shm->size)) > + return -EINVAL; > + > + if (va) { > + void *v = tee_shm_get_va(shm, pa - shm->paddr); > + > + if (IS_ERR(v)) > + return PTR_ERR(v); > + *va = v; > + } > + return 0; > +} > +EXPORT_SYMBOL_GPL(tee_shm_pa2va); > + > +/** > + * tee_shm_get_va() - Get virtual address of a shared memory plus an offset > + * @shm: Shared memory handle > + * @offs: Offset from start of this shared memory > + * @returns virtual address of the shared memory + offs if offs is within > + * the bounds of this shared memory, else an ERR_PTR > + */ > +void *tee_shm_get_va(struct tee_shm *shm, size_t offs) > +{ > + if (offs >= shm->size) > + return ERR_PTR(-EINVAL); > + return (char *)shm->kaddr + offs; > +} > +EXPORT_SYMBOL_GPL(tee_shm_get_va); > + > +/** > + * tee_shm_get_pa() - Get physical address of a shared memory plus an offset > + * @shm: Shared memory handle > + * @offs: Offset from start of this shared memory > + * @pa: Physical address to return > + * @returns 0 if offs is within the bounds of this shared memory, else an > + * error code. > + */ > +int tee_shm_get_pa(struct tee_shm *shm, size_t offs, phys_addr_t *pa) > +{ > + if (offs >= shm->size) > + return -EINVAL; > + if (pa) > + *pa = shm->paddr + offs; > + return 0; > +} > +EXPORT_SYMBOL_GPL(tee_shm_get_pa); > + > +/** > + * tee_shm_get_from_id() - Find shared memory object and increase referece count > + * @teedev: Driver owning the shared mmemory > + * @id: Id of shared memory object > + * @returns a pointer to 'struct tee_shm' on success or an ERR_PTR on failure > + */ > +struct tee_shm *tee_shm_get_from_id(struct tee_device *teedev, int id) > +{ > + struct tee_shm *shm; > + > + mutex_lock(&teedev->mutex); > + shm = idr_find(&teedev->idr, id); > + if (!shm) > + shm = ERR_PTR(-EINVAL); > + else if (shm->flags & TEE_SHM_DMA_BUF) > + get_dma_buf(shm->dmabuf); > + mutex_unlock(&teedev->mutex); > + return shm; > +} > +EXPORT_SYMBOL_GPL(tee_shm_get_from_id); > + > +/** > + * tee_shm_get_id() - Get id of a shared memory object > + * @shm: Shared memory handle > + * @returns id > + */ > +int tee_shm_get_id(struct tee_shm *shm) > +{ > + return shm->id; > +} > +EXPORT_SYMBOL_GPL(tee_shm_get_id); > + > +/** > + * tee_shm_put() - Decrease reference count on a shared memory handle > + * @shm: Shared memory handle > + */ > +void tee_shm_put(struct tee_shm *shm) > +{ > + if (shm->flags & TEE_SHM_DMA_BUF) > + dma_buf_put(shm->dmabuf); > +} > +EXPORT_SYMBOL_GPL(tee_shm_put); > diff --git a/drivers/tee/tee_shm_pool.c b/drivers/tee/tee_shm_pool.c > new file mode 100644 > index 0000000..ce5162b > --- /dev/null > +++ b/drivers/tee/tee_shm_pool.c > @@ -0,0 +1,155 @@ > +/* > + * Copyright (c) 2015, Linaro Limited > + * > + * This software is licensed under the terms of the GNU General Public > + * License version 2, as published by the Free Software Foundation, and > + * may be copied, distributed, and modified under those terms. > + * > + * 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/device.h> > +#include <linux/dma-buf.h> > +#include <linux/genalloc.h> > +#include <linux/slab.h> > +#include <linux/tee_drv.h> > +#include "tee_private.h" > + > +static int pool_op_gen_alloc(struct tee_shm_pool_mgr *poolm, > + struct tee_shm *shm, size_t size) > +{ > + unsigned long va; > + struct gen_pool *genpool = poolm->private_data; > + size_t s = roundup(size, 1 << genpool->min_alloc_order); > + > + va = gen_pool_alloc(genpool, s); > + if (!va) > + return -ENOMEM; > + shm->kaddr = (void *)va; > + shm->paddr = gen_pool_virt_to_phys(genpool, va); > + shm->size = s; > + return 0; > +} > + > +static void pool_op_gen_free(struct tee_shm_pool_mgr *poolm, > + struct tee_shm *shm) > +{ > + gen_pool_free(poolm->private_data, (unsigned long)shm->kaddr, > + shm->size); > + shm->kaddr = NULL; > +} > + > +static const struct tee_shm_pool_mgr_ops pool_ops_generic = { > + .alloc = pool_op_gen_alloc, > + .free = pool_op_gen_free, > +}; > + > +static void pool_res_mem_destroy(struct tee_shm_pool *pool) > +{ > + gen_pool_destroy(pool->private_mgr.private_data); > + gen_pool_destroy(pool->dma_buf_mgr.private_data); > +} > + > +static int pool_res_mem_mgr_init(struct tee_shm_pool_mgr *mgr, > + struct tee_shm_pool_mem_info *info, > + int min_alloc_order) > +{ > + size_t page_mask = PAGE_SIZE - 1; > + struct gen_pool *genpool = NULL; > + int rc; > + > + /* > + * Start and end must be page aligned > + */ > + if ((info->vaddr & page_mask) || (info->paddr & page_mask) || > + (info->size & page_mask)) > + return -EINVAL; > + > + genpool = gen_pool_create(min_alloc_order, -1); > + if (!genpool) > + return -ENOMEM; > + > + gen_pool_set_algo(genpool, gen_pool_best_fit, NULL); > + rc = gen_pool_add_virt(genpool, info->vaddr, info->paddr, info->size, > + -1); > + if (rc) { > + gen_pool_destroy(genpool); > + return rc; > + } > + > + mgr->private_data = genpool; > + mgr->ops = &pool_ops_generic; > + return 0; > +} > + > +/** > + * tee_shm_pool_alloc_res_mem() - Create a shared memory pool from reserved > + * memory range > + * @dev: Device allocating the pool > + * @priv_info: Information for driver private shared memory pool > + * @dmabuf_info: Information for dma-buf shared memory pool > + * > + * Start and end of pools will must be page aligned. > + * > + * Allocation with the flag TEE_SHM_DMA_BUF set will use the range supplied > + * in @dmabuf, others will use the range provided by @priv. > + * > + * @returns pointer to a 'struct tee_shm_pool' or an ERR_PTR on failure. > + */ > +struct tee_shm_pool *tee_shm_pool_alloc_res_mem(struct device *dev, > + struct tee_shm_pool_mem_info *priv_info, > + struct tee_shm_pool_mem_info *dmabuf_info) > +{ > + struct tee_shm_pool *pool = NULL; > + int ret; > + > + pool = kzalloc(sizeof(*pool), GFP_KERNEL); > + if (!pool) { > + ret = -ENOMEM; > + goto err; > + } > + > + /* > + * Create the pool for driver private shared memory > + */ > + ret = pool_res_mem_mgr_init(&pool->private_mgr, priv_info, > + 3 /* 8 byte aligned */); > + if (ret) > + goto err; > + > + /* > + * Create the pool for dma_buf shared memory > + */ > + ret = pool_res_mem_mgr_init(&pool->dma_buf_mgr, dmabuf_info, > + PAGE_SHIFT); > + if (ret) > + goto err; > + > + pool->destroy = pool_res_mem_destroy; > + return pool; > +err: > + if (ret == -ENOMEM) > + dev_err(dev, "can't allocate memory for res_mem shared memory pool\n"); > + if (pool && pool->private_mgr.private_data) > + gen_pool_destroy(pool->private_mgr.private_data); > + kfree(pool); > + return ERR_PTR(ret); > +} > +EXPORT_SYMBOL_GPL(tee_shm_pool_alloc_res_mem); > + > +/** > + * tee_shm_pool_free() - Free a shared memory pool > + * @pool: The shared memory pool to free > + * > + * There must be no remaining shared memory allocated from this pool when > + * this function is called. > + */ > +void tee_shm_pool_free(struct tee_shm_pool *pool) > +{ > + pool->destroy(pool); > + kfree(pool); > +} > +EXPORT_SYMBOL_GPL(tee_shm_pool_free); > diff --git a/include/linux/tee_drv.h b/include/linux/tee_drv.h > new file mode 100644 > index 0000000..b1d8227 > --- /dev/null > +++ b/include/linux/tee_drv.h > @@ -0,0 +1,273 @@ > +/* > + * Copyright (c) 2015-2016, Linaro Limited > + * > + * This software is licensed under the terms of the GNU General Public > + * License version 2, as published by the Free Software Foundation, and > + * may be copied, distributed, and modified under those terms. > + * > + * 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 __TEE_DRV_H > +#define __TEE_DRV_H > + > +#include <linux/types.h> > +#include <linux/idr.h> > +#include <linux/list.h> > +#include <linux/tee.h> > + > +/* > + * The file describes the API provided by the generic TEE driver to the > + * specific TEE driver. > + */ > + > +#define TEE_SHM_MAPPED 0x1 /* Memory mapped by the kernel */ > +#define TEE_SHM_DMA_BUF 0x2 /* Memory with dma-buf handle */ > + > +struct tee_device; > +struct tee_shm; > +struct tee_shm_pool; > + > +/** > + * struct tee_context - driver specific context on file pointer data > + * @teedev: pointer to this drivers struct tee_device > + * @data: driver specific context data, managed by the driver > + */ > +struct tee_context { > + struct tee_device *teedev; > + void *data; > +}; > + > +struct tee_param_memref { > + size_t shm_offs; > + size_t size; > + struct tee_shm *shm; > +}; > + > +struct tee_param_value { > + u64 a; > + u64 b; > + u64 c; > +}; > + > +struct tee_param { > + u64 attr; > + union { > + struct tee_param_memref memref; > + struct tee_param_value value; > + } u; > +}; > + > +/** > + * struct tee_driver_ops - driver operations vtable > + * @get_version: returns version of driver > + * @open: called when the device file is opened > + * @release: release this open file > + * @open_session: open a new session > + * @close_session: close a session > + * @invoke_func: invoke a trusted function > + * @cancel_req: request cancel of an ongoing invoke or open > + * @supp_revc: called for supplicant to get a command > + * @supp_send: called for supplicant to send a response > + */ > +struct tee_driver_ops { > + void (*get_version)(struct tee_device *teedev, > + struct tee_ioctl_version_data *vers); > + int (*open)(struct tee_context *ctx); > + void (*release)(struct tee_context *ctx); > + int (*open_session)(struct tee_context *ctx, > + struct tee_ioctl_open_session_arg *arg, > + struct tee_param *param); > + int (*close_session)(struct tee_context *ctx, u32 session); > + int (*invoke_func)(struct tee_context *ctx, > + struct tee_ioctl_invoke_arg *arg, > + struct tee_param *param); > + int (*cancel_req)(struct tee_context *ctx, u32 cancel_id, u32 session); > + int (*supp_recv)(struct tee_context *ctx, u32 *func, u32 *num_params, > + struct tee_param *param); > + int (*supp_send)(struct tee_context *ctx, u32 ret, u32 num_params, > + struct tee_param *param); > +}; > + > +/** > + * struct tee_desc - Describes the TEE driver to the subsystem > + * @name: name of driver > + * @ops: driver operations vtable > + * @owner: module providing the driver > + * @flags: Extra properties of driver, defined by TEE_DESC_* below > + */ > +#define TEE_DESC_PRIVILEGED 0x1 > +struct tee_desc { > + const char *name; > + const struct tee_driver_ops *ops; > + struct module *owner; > + u32 flags; > +}; > + > +/** > + * tee_device_alloc() - Allocate a new struct tee_device instance > + * @teedesc: Descriptor for this driver > + * @dev: Parent device for this device > + * @pool: Shared memory pool, NULL if not used > + * @driver_data: Private driver data for this device > + * > + * Allocates a new struct tee_device instance. The device is > + * removed by tee_device_unregister(). > + * > + * @returns a pointer to a 'struct tee_device' or an ERR_PTR on failure > + */ > +struct tee_device *tee_device_alloc(const struct tee_desc *teedesc, > + struct device *dev, struct tee_shm_pool *pool, > + void *driver_data); > + > +/** > + * tee_device_register() - Registers a TEE device > + * @teedev: Device to register > + * > + * tee_device_unregister() need to be called to remove the @teedev if > + * this function fails. > + * > + * @returns < 0 on failure > + */ > +int tee_device_register(struct tee_device *teedev); > + > +/** > + * tee_device_unregister() - Removes a TEE device > + * @teedev: Device to unregister > + * > + * This function should be called to remove the @teedev even if > + * tee_device_register() hasn't been called yet. Does nothing if > + * @teedev is NULL. > + */ > +void tee_device_unregister(struct tee_device *teedev); > + > +/** > + * struct tee_shm_pool_mem_info - holds information needed to create a shared memory pool > + * @vaddr: Virtual address of start of pool > + * @paddr: Physical address of start of pool > + * @size: Size in bytes of the pool > + */ > +struct tee_shm_pool_mem_info { > + unsigned long vaddr; > + unsigned long paddr; > + size_t size; > +}; > + > +/** > + * tee_shm_pool_alloc_res_mem() - Create a shared memory pool from reserved memory range > + * @dev: Device allocating the pool > + * @priv_info: Information for driver private shared memory pool > + * @dmabuf_info: Information for dma-buf shared memory pool > + * > + * Start and end of pools will must be page aligned. > + * > + * Allocation with the flag TEE_SHM_DMA_BUF set will use the range supplied > + * in @dmabuf, others will use the range provided by @priv. > + * > + * @returns pointer to a 'struct tee_shm_pool' or an ERR_PTR on failure. > + */ > +struct tee_shm_pool *tee_shm_pool_alloc_res_mem(struct device *dev, > + struct tee_shm_pool_mem_info *priv_info, > + struct tee_shm_pool_mem_info *dmabuf_info); > + > +/** > + * tee_shm_pool_free() - Free a shared memory pool > + * @pool: The shared memory pool to free > + * > + * The must be no remaining shared memory allocated from this pool when > + * this function is called. > + */ > +void tee_shm_pool_free(struct tee_shm_pool *pool); > + > +/** > + * tee_get_drvdata() - Return driver_data pointer > + * @returns the driver_data pointer supplied to tee_register(). > + */ > +void *tee_get_drvdata(struct tee_device *teedev); > + > +/** > + * tee_shm_alloc() - Allocate shared memory > + * @teedev: Driver that allocates the shared memory > + * @size: Requested size of shared memory > + * @flags: Flags setting properties for the requested shared memory. > + * > + * Memory allocated as global shared memory is automatically freed when the > + * TEE file pointer is closed. The @flags field uses the bits defined by > + * TEE_SHM_* above. TEE_SHM_MAPPED must currently always be set. If > + * TEE_SHM_DMA_BUF global shared memory will be allocated and associated > + * with a dma-buf handle, else driver private memory. > + * > + * @returns a pointer to 'struct tee_shm' > + */ > +struct tee_shm *tee_shm_alloc(struct tee_device *teedev, size_t size, > + u32 flags); > + > +/** > + * tee_shm_free() - Free shared memory > + * @shm: Handle to shared memory to free > + */ > +void tee_shm_free(struct tee_shm *shm); > + > +/** > + * tee_shm_put() - Decrease reference count on a shared memory handle > + * @shm: Shared memory handle > + */ > +void tee_shm_put(struct tee_shm *shm); > + > +/** > + * tee_shm_va2pa() - Get physical address of a virtual address > + * @shm: Shared memory handle > + * @va: Virtual address to tranlsate > + * @pa: Returned physical address > + * @returns 0 on success and < 0 on failure > + */ > +int tee_shm_va2pa(struct tee_shm *shm, void *va, phys_addr_t *pa); > + > +/** > + * tee_shm_pa2va() - Get virtual address of a physical address > + * @shm: Shared memory handle > + * @pa: Physical address to tranlsate > + * @va: Returned virtual address > + * @returns 0 on success and < 0 on failure > + */ > +int tee_shm_pa2va(struct tee_shm *shm, phys_addr_t pa, void **va); > + > +/** > + * tee_shm_get_va() - Get virtual address of a shared memory plus an offset > + * @shm: Shared memory handle > + * @offs: Offset from start of this shared memory > + * @returns virtual address of the shared memory + offs if offs is within > + * the bounds of this shared memory, else an ERR_PTR > + */ > +void *tee_shm_get_va(struct tee_shm *shm, size_t offs); > + > +/** > + * tee_shm_get_pa() - Get physical address of a shared memory plus an offset > + * @shm: Shared memory handle > + * @offs: Offset from start of this shared memory > + * @pa: Physical address to return > + * @returns 0 if offs is within the bounds of this shared memory, else an > + * error code. > + */ > +int tee_shm_get_pa(struct tee_shm *shm, size_t offs, phys_addr_t *pa); > + > +/** > + * tee_shm_get_id() - Get id of a shared memory object > + * @shm: Shared memory handle > + * @returns id > + */ > +int tee_shm_get_id(struct tee_shm *shm); > + > +/** > + * tee_shm_get_from_id() - Find shared memory object and increase referece count > + * @teedev: Driver owning the shared mmemory > + * @id: Id of shared memory object > + * @returns a pointer to 'struct tee_shm' on success or an ERR_PTR on failure > + */ > +struct tee_shm *tee_shm_get_from_id(struct tee_device *teedev, int id); > + > +#endif /*__TEE_DRV_H*/ > diff --git a/include/uapi/linux/tee.h b/include/uapi/linux/tee.h > new file mode 100644 > index 0000000..b2bcb23 > --- /dev/null > +++ b/include/uapi/linux/tee.h > @@ -0,0 +1,400 @@ > +/* > + * Copyright (c) 2015-2016, Linaro Limited > + * All rights reserved. > + * > + * Redistribution and use in source and binary forms, with or without > + * modification, are permitted provided that the following conditions are met: > + * > + * 1. Redistributions of source code must retain the above copyright notice, > + * this list of conditions and the following disclaimer. > + * > + * 2. Redistributions in binary form must reproduce the above copyright notice, > + * this list of conditions and the following disclaimer in the documentation > + * and/or other materials provided with the distribution. > + * > + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" > + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE > + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE > + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE > + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR > + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF > + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS > + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN > + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) > + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE > + * POSSIBILITY OF SUCH DAMAGE. > + */ > + > +#ifndef __TEE_H > +#define __TEE_H > + > +#include <linux/ioctl.h> > +#include <linux/types.h> > + > +/* > + * This file describes the API provided by a TEE driver to user space. > + * > + * Each TEE driver defines a TEE specific protocol which is used for the > + * data passed back and forth using TEE_IOC_CMD. > + */ > + > +/* Helpers to make the ioctl defines */ > +#define TEE_IOC_MAGIC 0xa4 > +#define TEE_IOC_BASE 0 > + > +/* Flags relating to shared memory */ > +#define TEE_IOCTL_SHM_MAPPED 0x1 /* memory mapped in normal world */ > +#define TEE_IOCTL_SHM_DMA_BUF 0x2 /* dma-buf handle on shared memory */ > + > +#define TEE_MAX_ARG_SIZE 1024 > + > +#define TEE_GEN_CAP_GP (1 << 0)/* GlobalPlatform compliant TEE */ > + > +/* > + * TEE Implementation ID > + */ > +#define TEE_IMPL_ID_OPTEE 1 > + > +/* > + * OP-TEE specific capabilities > + */ > +#define TEE_OPTEE_CAP_TZ (1 << 0) > + > +/** > + * struct tee_ioctl_version_data - TEE version > + * @impl_id: [out] TEE implementation id > + * @impl_caps: [out] Implementation specific capabilities > + * @gen_caps: [out] Generic capabilities, defined by TEE_GEN_CAPS_* above > + * > + * Identifies the TEE implementation, @impl_id is one of TEE_IMPL_ID_* above. > + * @impl_caps is implementation specific, for example TEE_OPTEE_CAP_* > + * is valid when @impl_id == TEE_IMPL_ID_OPTEE. > + */ > +struct tee_ioctl_version_data { > + __u32 impl_id; > + __u32 impl_caps; > + __u32 gen_caps; > +}; > + > +/** > + * TEE_IOC_VERSION - query version of TEE > + * > + * Takes a tee_ioctl_version_data struct and returns with the TEE version > + * data filled in. > + */ > +#define TEE_IOC_VERSION _IOR(TEE_IOC_MAGIC, TEE_IOC_BASE + 0, \ > + struct tee_ioctl_version_data) > + > +/** > + * struct tee_ioctl_shm_alloc_data - Shared memory allocate argument > + * @size: [in/out] Size of shared memory to allocate > + * @flags: [in/out] Flags to/from allocation. > + * @id: [out] Identifier of the shared memory > + * > + * The flags field should currently be zero as input. Updated by the call > + * with actual flags as defined by TEE_IOCTL_SHM_* above. > + * This structure is used as argument for TEE_IOC_SHM_ALLOC below. > + */ > +struct tee_ioctl_shm_alloc_data { > + __u64 size; > + __u32 flags; > + __s32 id; > +}; > + > +/** > + * TEE_IOC_SHM_ALLOC - allocate shared memory > + * > + * Allocates shared memory between the user space process and secure OS. > + * > + * Returns a file descriptor on success or < 0 on failure > + * > + * The returned file descriptor is used to map the shared memory into user > + * space. The shared memory is freed when the descriptor is closed and the > + * memory is unmapped. > + */ > +#define TEE_IOC_SHM_ALLOC _IOWR(TEE_IOC_MAGIC, TEE_IOC_BASE + 1, \ > + struct tee_ioctl_shm_alloc_data) > + > +/** > + * struct tee_ioctl_buf_data - Variable sized buffer > + * @buf_ptr: [in] A __user pointer to a buffer > + * @buf_len: [in] Length of the buffer above > + * > + * Used as argument for TEE_IOC_OPEN_SESSION, TEE_IOC_INVOKE, > + * TEE_IOC_SUPPL_RECV, and TEE_IOC_SUPPL_SEND below. > + */ > +struct tee_ioctl_buf_data { > + __u64 buf_ptr; > + __u64 buf_len; > +}; > + > +/* > + * Attributes for struct tee_ioctl_param, selects field in the union > + */ > +#define TEE_IOCTL_PARAM_ATTR_TYPE_NONE 0 /* parameter not used */ > + > +/* > + * These defines value parameters (struct tee_ioctl_param_value) > + */ > +#define TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT 1 > +#define TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT 2 > +#define TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INOUT 3 /* input and output */ > + > +/* > + * These defines shared memory reference parameters (struct > + * tee_ioctl_param_memref) > + */ > +#define TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT 5 > +#define TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_OUTPUT 6 > +#define TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT 7 /* input and output */ > + > +/* > + * Mask for the type part of the attribute, leaves room for more types > + */ > +#define TEE_IOCTL_PARAM_ATTR_TYPE_MASK 0xff > + > +/* > + * Matches TEEC_LOGIN_* in GP TEE Client API > + * Is only defined for GP compliant TEEs > + */ > +#define TEE_IOCTL_LOGIN_PUBLIC 0 > +#define TEE_IOCTL_LOGIN_USER 1 > +#define TEE_IOCTL_LOGIN_GROUP 2 > +#define TEE_IOCTL_LOGIN_APPLICATION 4 > +#define TEE_IOCTL_LOGIN_USER_APPLICATION 5 > +#define TEE_IOCTL_LOGIN_GROUP_APPLICATION 6 > + > +/** > + * struct tee_ioctl_param_memref - memory reference > + * @shm_offs: Offset into the shared memory object > + * @size: Size of the buffer > + * @shm_id: Shared memory identifier > + * > + * Shared memory is allocated with TEE_IOC_SHM_ALLOC which returns an > + * identifier representing the shared memory object. A memref can reference > + * a part of a shared memory by specifying an offset (@shm_offs) and @size > + * of the object. To supply the entire shared memory object set @shm_offs > + * to 0 and @size to the previously returned size of the object. > + */ > +struct tee_ioctl_param_memref { > + __u64 shm_offs; > + __u64 size; > + __s64 shm_id; > +}; > + > +/** > + * struct tee_ioctl_param_value - values > + * @a: first value > + * @b: second value > + * @c: third value > + */ > +struct tee_ioctl_param_value { > + __u64 a; > + __u64 b; > + __u64 c; > +}; > + > +/** > + * struct tee_ioctl_param - parameter > + * @attr: attributes > + * @memref: a memory reference > + * @value: a value > + * > + * @attr & TEE_PARAM_ATTR_TYPE_MASK indicates if memref or value is used in > + * the union. TEE_PARAM_ATTR_TYPE_VALUE_* indicates value and > + * TEE_PARAM_ATTR_TYPE_MEMREF_* indicates memref. TEE_PARAM_ATTR_TYPE_NONE > + * indicates that none of the members are used. > + */ > +struct tee_ioctl_param { > + __u64 attr; > + union { > + struct tee_ioctl_param_memref memref; > + struct tee_ioctl_param_value value; > + } u; > +}; > + > +#define TEE_IOCTL_UUID_LEN 16 > + > +/** > + * struct tee_ioctl_open_session_arg - Open session argument > + * @uuid: [in] UUID of the Trusted Application > + * @clnt_uuid: [in] UUID of client > + * @clnt_login: [in] Login class of client, TEE_LOGIN_* above > + * @cancel_id: [in] Cancellation id, a unique value to identify this request > + * @session: [out] Session id > + * @ret: [out] return value > + * @ret_origin [out] origin of the return value > + * @num_params [in] number of parameters following this struct > + */ > +struct tee_ioctl_open_session_arg { > + __u8 uuid[TEE_IOCTL_UUID_LEN]; > + __u8 clnt_uuid[TEE_IOCTL_UUID_LEN]; > + __u32 clnt_login; > + __u32 cancel_id; > + __u32 session; > + __u32 ret; > + __u32 ret_origin; > + __u32 num_params; > + /* > + * this struct is 8 byte aligned since the 'struct tee_ioctl_param' > + * which follows requires 8 byte alignment. > + * > + * Commented out element used to visualize the layout dynamic part > + * of the struct. This field is not available at all if > + * num_params == 0. > + * > + * struct tee_ioctl_param params[num_params]; > + */ > +} __aligned(8); > + > +/** > + * TEE_IOC_OPEN_SESSION - opens a session to a Trusted Application > + * > + * Takes a struct tee_ioctl_buf_data which contains a struct > + * tee_ioctl_open_session_arg followed by any array of struct > + * tee_ioctl_param > + */ > +#define TEE_IOC_OPEN_SESSION _IOR(TEE_IOC_MAGIC, TEE_IOC_BASE + 2, \ > + struct tee_ioctl_buf_data) > + > +/** > + * struct tee_ioctl_invoke_func_arg - Invokes a function in a Trusted Application > + * @func: [in] Trusted Application function, specific to the TA > + * @session: [in] Session id > + * @cancel_id: [in] Cancellation id, a unique value to identify this request > + * @ret: [out] return value > + * @ret_origin [out] origin of the return value > + * @num_params [in] number of parameters following this struct > + */ > +struct tee_ioctl_invoke_arg { > + __u32 func; > + __u32 session; > + __u32 cancel_id; > + __u32 ret; > + __u32 ret_origin; > + __u32 num_params; > + /* > + * this struct is 8 byte aligned since the 'struct tee_ioctl_param' > + * which follows requires 8 byte alignment. > + * > + * Commented out element used to visualize the layout dynamic part > + * of the struct. This field is not available at all if > + * num_params == 0. > + * > + * struct tee_ioctl_param params[num_params]; > + */ > +} __aligned(8); > + > +/** > + * TEE_IOC_INVOKE - Invokes a function in a Trusted Application > + * > + * Takes a struct tee_ioctl_buf_data which contains a struct > + * tee_invoke_func_arg followed by any array of struct tee_param > + */ > +#define TEE_IOC_INVOKE _IOR(TEE_IOC_MAGIC, TEE_IOC_BASE + 3, \ > + struct tee_ioctl_buf_data) > + > +/** > + * struct tee_ioctl_cancel_arg - Cancels an open session or invoke ioctl > + * @cancel_id: [in] Cancellation id, a unique value to identify this request > + * @session: [in] Session id, if the session is opened, else set to 0 > + */ > +struct tee_ioctl_cancel_arg { > + __u32 cancel_id; > + __u32 session; > +}; > + > +/** > + * TEE_IOC_CANCEL - Cancels an open session or invoke > + */ > +#define TEE_IOC_CANCEL _IOR(TEE_IOC_MAGIC, TEE_IOC_BASE + 4, \ > + struct tee_ioctl_cancel_arg) > + > +/** > + * struct tee_ioctl_close_session_arg - Closes an open session > + * @session: [in] Session id > + */ > +struct tee_ioctl_close_session_arg { > + __u32 session; > +}; > + > +/** > + * TEE_IOC_CLOSE_SESSION - Closes a session > + */ > +#define TEE_IOC_CLOSE_SESSION _IOR(TEE_IOC_MAGIC, TEE_IOC_BASE + 5, \ > + struct tee_ioctl_close_session_arg) > + > +/** > + * struct tee_iocl_supp_recv_arg - Receive a request for a supplicant function > + * @func: [in] supplicant function > + * @num_params [in/out] number of parameters following this struct > + * > + * @num_params is the number of params that tee-supplicant has room to > + * receive when input, @num_params is the number of actual params > + * tee-supplicant receives when output. > + */ > +struct tee_iocl_supp_recv_arg { > + __u32 func; > + __u32 num_params; > + /* > + * this struct is 8 byte aligned since the 'struct tee_ioctl_param' > + * which follows requires 8 byte alignment. > + * > + * Commented out element used to visualize the layout dynamic part > + * of the struct. This field is not available at all if > + * num_params == 0. > + * > + * struct tee_ioctl_param params[num_params]; > + */ > +} __aligned(8); > + > +/** > + * TEE_IOC_SUPPL_RECV - Receive a request for a supplicant function > + * > + * Takes a struct tee_ioctl_buf_data which contains a struct > + * tee_iocl_supp_recv_arg followed by any array of struct tee_param > + */ > +#define TEE_IOC_SUPPL_RECV _IOR(TEE_IOC_MAGIC, TEE_IOC_BASE + 6, \ > + struct tee_ioctl_buf_data) > + > +/** > + * struct tee_iocl_supp_send_arg - Send a response to a received request > + * @ret: [out] return value > + * @num_params [in] number of parameters following this struct > + */ > +struct tee_iocl_supp_send_arg { > + __u32 ret; > + __u32 num_params; > + /* > + * this struct is 8 byte aligned since the 'struct tee_ioctl_param' > + * which follows requires 8 byte alignment. > + * > + * Commented out element used to visualize the layout dynamic part > + * of the struct. This field is not available at all if > + * num_params == 0. > + * > + * struct tee_ioctl_param params[num_params]; > + */ > +} __aligned(8); > +/** > + * TEE_IOC_SUPPL_SEND - Receive a request for a supplicant function > + * > + * Takes a struct tee_ioctl_buf_data which contains a struct > + * tee_iocl_supp_send_arg followed by any array of struct tee_param > + */ > +#define TEE_IOC_SUPPL_SEND _IOR(TEE_IOC_MAGIC, TEE_IOC_BASE + 7, \ > + struct tee_ioctl_buf_data) > + > +/* > + * Five syscalls are used when communicating with the TEE driver. > + * open(): opens the device associated with the driver > + * ioctl(): as described above operating on the file descriptor from open() > + * close(): two cases > + * - closes the device file descriptor > + * - closes a file descriptor connected to allocated shared memory > + * mmap(): maps shared memory into user space using information from struct > + * tee_ioctl_shm_alloc_data > + * munmap(): unmaps previously shared memory > + */ > + > +#endif /*__TEE_H*/ > -- > 1.9.1 Reviewed-by: Javier González <javier@xxxxxxxxxxx>
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