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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2026-08-19 10:09:22 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2026-08-19 10:09:22 -0700 |
| commit | f4cdf7ca9a1fdcca413157df19753f388a5a224e (patch) | |
| tree | 60a31895b2446cd7fa27514e8c2843534a0de0da /drivers/crypto/ccp/dbc.c | |
| download | linux-stable-f4cdf7ca9a1fdcca413157df19753f388a5a224e.tar.gz linux-stable-f4cdf7ca9a1fdcca413157df19753f388a5a224e.zip | |
Merge tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-mediagrafted
Pull media updates from Mauro Carvalho Chehab:
- v4l2-core: added ISP statistics support and per-block validation
- v4l2-core: Allow unknown HDR10 white point and luminance
- New camera sensors: Sony IMX678 and IMX471m, Himax HM1092 IR sensor
- New codec: Milos: VPU v2.0 codec support
- isp driver: gained support for Dreamchip RPPX1 ISP framework
- vsp1 driver: gained support for RZ/T2H and RZ/N2H
- Novalake driver: gained CVS support for new NVL hardware
- dvb-core: fix feed leak on failed DMX_ADD_PID
- several driver fixes, cleanups and minor improvements
* tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (308 commits)
media: ipu-bridge: check all DMI entries when overriding sensor rotation
media: v4l2-async: avoid deleting unlinked ASC entry on link error
media: rzg2l-cru: Align bytesperline to hardware DMA stride requirement
media: intel/ipu6: fix async notifier cleanup leak on parse error
media: staging/ipu7: fix async notifier UAF on probe error path
media: amd: isp4: fix self-deadlock in isp4sd_pwron_and_init() error path
media: amd: isp4: release partial allocations in isp4if_alloc_fw_gpumem()
media: rcar-isp: Fix VSPX reference leaks
media: rcar-isp: Release ISPCORE resources
media: i2c: imx415: Release runtime PM reference on VBLANK error
media: i2c: imx415: Return test pattern write errors
media: renesas: vsp1: Declare index variables in for loop statement
media: renesas: vsp1: Make reset control optional to support platforms without a reset line
media: dt-bindings: media: renesas,vsp1: Document RZ/T2H and RZ/N2H SoCs
media: dt-bindings: media: renesas,fcp: Document RZ/T2H and RZ/N2H SoCs
media: nxp: imx8-isi: Add additional 32-bit RGB format support
media: nxp: imx8-isi: Add 16-bit raw Bayer format support
media: nxp: imx8-isi: Implement per-stream reference counting for multiplexed streams
media: nxp: imx8-isi: Use BIT_ULL() for 64-bit stream masks
media: nxp: imx8-isi: Correct color map between V4L2 and ISI
...
Diffstat (limited to 'drivers/crypto/ccp/dbc.c')
| -rw-r--r-- | drivers/crypto/ccp/dbc.c | 259 |
1 files changed, 259 insertions, 0 deletions
diff --git a/drivers/crypto/ccp/dbc.c b/drivers/crypto/ccp/dbc.c new file mode 100644 index 000000000..410084a90 --- /dev/null +++ b/drivers/crypto/ccp/dbc.c @@ -0,0 +1,259 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * AMD Secure Processor Dynamic Boost Control interface + * + * Copyright (C) 2023 Advanced Micro Devices, Inc. + * + * Author: Mario Limonciello <mario.limonciello@amd.com> + */ + +#include <linux/mutex.h> + +#include "dbc.h" + +#define DBC_DEFAULT_TIMEOUT (10 * MSEC_PER_SEC) +struct error_map { + u32 psp; + int ret; +}; + +#define DBC_ERROR_ACCESS_DENIED 0x0001 +#define DBC_ERROR_EXCESS_DATA 0x0004 +#define DBC_ERROR_BAD_PARAMETERS 0x0006 +#define DBC_ERROR_BAD_STATE 0x0007 +#define DBC_ERROR_NOT_IMPLEMENTED 0x0009 +#define DBC_ERROR_BUSY 0x000D +#define DBC_ERROR_MESSAGE_FAILURE 0x0307 +#define DBC_ERROR_OVERFLOW 0x300F +#define DBC_ERROR_SIGNATURE_INVALID 0x3072 + +static struct error_map error_codes[] = { + {DBC_ERROR_ACCESS_DENIED, -EACCES}, + {DBC_ERROR_EXCESS_DATA, -E2BIG}, + {DBC_ERROR_BAD_PARAMETERS, -EINVAL}, + {DBC_ERROR_BAD_STATE, -EAGAIN}, + {DBC_ERROR_MESSAGE_FAILURE, -ENOENT}, + {DBC_ERROR_NOT_IMPLEMENTED, -ENOENT}, + {DBC_ERROR_BUSY, -EBUSY}, + {DBC_ERROR_OVERFLOW, -ENFILE}, + {DBC_ERROR_SIGNATURE_INVALID, -EPERM}, + {0x0, 0x0}, +}; + +static inline int send_dbc_cmd_thru_ext(struct psp_dbc_device *dbc_dev, int msg) +{ + dbc_dev->mbox->ext_req.header.sub_cmd_id = msg; + + return psp_extended_mailbox_cmd(dbc_dev->psp, + DBC_DEFAULT_TIMEOUT, + (struct psp_ext_request *)dbc_dev->mbox); +} + +static inline int send_dbc_cmd_thru_pa(struct psp_dbc_device *dbc_dev, int msg) +{ + return psp_send_platform_access_msg(msg, + (struct psp_request *)dbc_dev->mbox); +} + +static int send_dbc_cmd(struct psp_dbc_device *dbc_dev, int msg) +{ + int ret; + + *dbc_dev->result = 0; + ret = dbc_dev->use_ext ? send_dbc_cmd_thru_ext(dbc_dev, msg) : + send_dbc_cmd_thru_pa(dbc_dev, msg); + if (ret == -EIO) { + int i; + + dev_dbg(dbc_dev->dev, + "msg 0x%x failed with PSP error: 0x%x\n", + msg, *dbc_dev->result); + + for (i = 0; error_codes[i].psp; i++) { + if (*dbc_dev->result == error_codes[i].psp) + return error_codes[i].ret; + } + } + + return ret; +} + +static int send_dbc_nonce(struct psp_dbc_device *dbc_dev) +{ + int ret; + + *dbc_dev->payload_size = dbc_dev->header_size + sizeof(struct dbc_user_nonce); + ret = send_dbc_cmd(dbc_dev, PSP_DYNAMIC_BOOST_GET_NONCE); + if (ret == -EAGAIN) { + dev_dbg(dbc_dev->dev, "retrying get nonce\n"); + ret = send_dbc_cmd(dbc_dev, PSP_DYNAMIC_BOOST_GET_NONCE); + } + + return ret; +} + +static int send_dbc_parameter(struct psp_dbc_device *dbc_dev) +{ + struct dbc_user_param *user_param = (struct dbc_user_param *)dbc_dev->payload; + + switch (user_param->msg_index) { + case PARAM_SET_FMAX_CAP: + case PARAM_SET_PWR_CAP: + case PARAM_SET_GFX_MODE: + return send_dbc_cmd(dbc_dev, PSP_DYNAMIC_BOOST_SET_PARAMETER); + case PARAM_GET_FMAX_CAP: + case PARAM_GET_PWR_CAP: + case PARAM_GET_CURR_TEMP: + case PARAM_GET_FMAX_MAX: + case PARAM_GET_FMAX_MIN: + case PARAM_GET_SOC_PWR_MAX: + case PARAM_GET_SOC_PWR_MIN: + case PARAM_GET_SOC_PWR_CUR: + case PARAM_GET_GFX_MODE: + return send_dbc_cmd(dbc_dev, PSP_DYNAMIC_BOOST_GET_PARAMETER); + } + + return -EINVAL; +} + +void dbc_dev_destroy(struct psp_device *psp) +{ + struct psp_dbc_device *dbc_dev = psp->dbc_data; + + if (!dbc_dev) + return; + + misc_deregister(&dbc_dev->char_dev); + mutex_destroy(&dbc_dev->ioctl_mutex); + psp->dbc_data = NULL; +} + +static long dbc_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) +{ + struct psp_device *psp_master = psp_get_master_device(); + void __user *argp = (void __user *)arg; + struct psp_dbc_device *dbc_dev; + int ret; + + if (!psp_master || !psp_master->dbc_data) + return -ENODEV; + dbc_dev = psp_master->dbc_data; + + guard(mutex)(&dbc_dev->ioctl_mutex); + + switch (cmd) { + case DBCIOCNONCE: + if (copy_from_user(dbc_dev->payload, argp, sizeof(struct dbc_user_nonce))) + return -EFAULT; + + ret = send_dbc_nonce(dbc_dev); + if (ret) + return ret; + + if (copy_to_user(argp, dbc_dev->payload, sizeof(struct dbc_user_nonce))) + return -EFAULT; + break; + case DBCIOCUID: + if (copy_from_user(dbc_dev->payload, argp, sizeof(struct dbc_user_setuid))) + return -EFAULT; + + *dbc_dev->payload_size = dbc_dev->header_size + sizeof(struct dbc_user_setuid); + ret = send_dbc_cmd(dbc_dev, PSP_DYNAMIC_BOOST_SET_UID); + if (ret) + return ret; + + if (copy_to_user(argp, dbc_dev->payload, sizeof(struct dbc_user_setuid))) + return -EFAULT; + break; + case DBCIOCPARAM: + if (copy_from_user(dbc_dev->payload, argp, sizeof(struct dbc_user_param))) + return -EFAULT; + + *dbc_dev->payload_size = dbc_dev->header_size + sizeof(struct dbc_user_param); + ret = send_dbc_parameter(dbc_dev); + if (ret) + return ret; + + if (copy_to_user(argp, dbc_dev->payload, sizeof(struct dbc_user_param))) + return -EFAULT; + break; + default: + return -EINVAL; + } + + return 0; +} + +static const struct file_operations dbc_fops = { + .owner = THIS_MODULE, + .unlocked_ioctl = dbc_ioctl, +}; + +int dbc_dev_init(struct psp_device *psp) +{ + struct device *dev = psp->dev; + struct psp_dbc_device *dbc_dev; + int ret; + + dbc_dev = devm_kzalloc(dev, sizeof(*dbc_dev), GFP_KERNEL); + if (!dbc_dev) + return -ENOMEM; + + BUILD_BUG_ON(sizeof(union dbc_buffer) > PAGE_SIZE); + dbc_dev->mbox = (void *)devm_get_free_pages(dev, GFP_KERNEL | __GFP_ZERO, 0); + if (!dbc_dev->mbox) { + ret = -ENOMEM; + goto cleanup_dev; + } + + psp->dbc_data = dbc_dev; + dbc_dev->dev = dev; + dbc_dev->psp = psp; + + if (psp->capability.dbc_thru_ext) { + dbc_dev->use_ext = true; + dbc_dev->payload_size = &dbc_dev->mbox->ext_req.header.payload_size; + dbc_dev->result = &dbc_dev->mbox->ext_req.header.status; + dbc_dev->payload = &dbc_dev->mbox->ext_req.buf; + dbc_dev->header_size = sizeof(struct psp_ext_req_buffer_hdr); + } else { + dbc_dev->payload_size = &dbc_dev->mbox->pa_req.header.payload_size; + dbc_dev->result = &dbc_dev->mbox->pa_req.header.status; + dbc_dev->payload = &dbc_dev->mbox->pa_req.buf; + dbc_dev->header_size = sizeof(struct psp_req_buffer_hdr); + } + + ret = send_dbc_nonce(dbc_dev); + if (ret == -EACCES) { + dev_dbg(dbc_dev->dev, + "dynamic boost control was previously authenticated\n"); + ret = 0; + } + dev_dbg(dbc_dev->dev, "dynamic boost control is %savailable\n", + ret ? "un" : ""); + if (ret) { + ret = 0; + goto cleanup_mbox; + } + + dbc_dev->char_dev.minor = MISC_DYNAMIC_MINOR; + dbc_dev->char_dev.name = "dbc"; + dbc_dev->char_dev.fops = &dbc_fops; + dbc_dev->char_dev.mode = 0600; + ret = misc_register(&dbc_dev->char_dev); + if (ret) + goto cleanup_mbox; + + mutex_init(&dbc_dev->ioctl_mutex); + + return 0; + +cleanup_mbox: + devm_free_pages(dev, (unsigned long)dbc_dev->mbox); + +cleanup_dev: + psp->dbc_data = NULL; + devm_kfree(dev, dbc_dev); + + return ret; +} |
