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/*
* Copyright © 2016-2017 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
*/
#include <linux/firmware.h>
#include <drm/drm_print.h>
#include "intel_uc_fw.h"
#include "i915_drv.h"
/**
* intel_uc_fw_fetch - fetch uC firmware
*
* @dev_priv: device private
* @uc_fw: uC firmware
*
* Fetch uC firmware into GEM obj.
*/
void intel_uc_fw_fetch(struct drm_i915_private *dev_priv,
struct intel_uc_fw *uc_fw)
{
struct pci_dev *pdev = dev_priv->drm.pdev;
struct drm_i915_gem_object *obj;
const struct firmware *fw = NULL;
struct uc_css_header *css;
size_t size;
int err;
DRM_DEBUG_DRIVER("%s fw fetch %s\n",
intel_uc_fw_type_repr(uc_fw->type), uc_fw->path);
if (!uc_fw->path)
return;
uc_fw->fetch_status = INTEL_UC_FIRMWARE_PENDING;
DRM_DEBUG_DRIVER("%s fw fetch %s\n",
intel_uc_fw_type_repr(uc_fw->type),
intel_uc_fw_status_repr(uc_fw->fetch_status));
err = request_firmware(&fw, uc_fw->path, &pdev->dev);
if (err) {
DRM_DEBUG_DRIVER("%s fw request_firmware err=%d\n",
intel_uc_fw_type_repr(uc_fw->type), err);
goto fail;
}
DRM_DEBUG_DRIVER("%s fw size %zu ptr %p\n",
intel_uc_fw_type_repr(uc_fw->type), fw->size, fw);
/* Check the size of the blob before examining buffer contents */
if (fw->size < sizeof(struct uc_css_header)) {
DRM_WARN("%s: Unexpected firmware size (%zu, min %zu)\n",
intel_uc_fw_type_repr(uc_fw->type),
fw->size, sizeof(struct uc_css_header));
err = -ENODATA;
goto fail;
}
css = (struct uc_css_header *)fw->data;
/* Firmware bits always start from header */
uc_fw->header_offset = 0;
uc_fw->header_size = (css->header_size_dw - css->modulus_size_dw -
css->key_size_dw - css->exponent_size_dw) *
sizeof(u32);
if (uc_fw->header_size != sizeof(struct uc_css_header)) {
DRM_WARN("%s: Mismatched firmware header definition\n",
intel_uc_fw_type_repr(uc_fw->type));
err = -ENOEXEC;
goto fail;
}
/* then, uCode */
uc_fw->ucode_offset = uc_fw->header_offset + uc_fw->header_size;
uc_fw->ucode_size = (css->size_dw - css->header_size_dw) * sizeof(u32);
/* now RSA */
if (css->key_size_dw != UOS_RSA_SCRATCH_COUNT) {
DRM_WARN("%s: Mismatched firmware RSA key size (%u)\n",
intel_uc_fw_type_repr(uc_fw->type), css->key_size_dw);
err = -ENOEXEC;
goto fail;
}
uc_fw->rsa_offset = uc_fw->ucode_offset + uc_fw->ucode_size;
uc_fw->rsa_size = css->key_size_dw * sizeof(u32);
/* At least, it should have header, uCode and RSA. Size of all three. */
size = uc_fw->header_size + uc_fw->ucode_size + uc_fw->rsa_size;
if (fw->size < size) {
DRM_WARN("%s: Truncated firmware (%zu, expected %zu)\n",
intel_uc_fw_type_repr(uc_fw->type), fw->size, size);
err = -ENOEXEC;
goto fail;
}
/*
* The GuC firmware image has the version number embedded at a
* well-known offset within the firmware blob; note that major / minor
* version are TWO bytes each (i.e. u16), although all pointers and
* offsets are defined in terms of bytes (u8).
*/
switch (uc_fw->type) {
case INTEL_UC_FW_TYPE_GUC:
uc_fw->major_ver_found = css->guc.sw_version >> 16;
uc_fw->minor_ver_found = css->guc.sw_version & 0xFFFF;
break;
case INTEL_UC_FW_TYPE_HUC:
uc_fw->major_ver_found = css->huc.sw_version >> 16;
uc_fw->minor_ver_found = css->huc.sw_version & 0xFFFF;
break;
default:
MISSING_CASE(uc_fw->type);
break;
}
DRM_DEBUG_DRIVER("%s fw version %u.%u (wanted %u.%u)\n",
intel_uc_fw_type_repr(uc_fw->type),
uc_fw->major_ver_found, uc_fw->minor_ver_found,
uc_fw->major_ver_wanted, uc_fw->minor_ver_wanted);
if (uc_fw->major_ver_wanted == 0 && uc_fw->minor_ver_wanted == 0) {
DRM_NOTE("%s: Skipping firmware version check\n",
intel_uc_fw_type_repr(uc_fw->type));
} else if (uc_fw->major_ver_found != uc_fw->major_ver_wanted ||
uc_fw->minor_ver_found < uc_fw->minor_ver_wanted) {
DRM_NOTE("%s: Wrong firmware version (%u.%u, required %u.%u)\n",
intel_uc_fw_type_repr(uc_fw->type),
uc_fw->major_ver_found, uc_fw->minor_ver_found,
uc_fw->major_ver_wanted, uc_fw->minor_ver_wanted);
err = -ENOEXEC;
goto fail;
}
obj = i915_gem_object_create_from_data(dev_priv, fw->data, fw->size);
if (IS_ERR(obj)) {
err = PTR_ERR(obj);
DRM_DEBUG_DRIVER("%s fw object_create err=%d\n",
intel_uc_fw_type_repr(uc_fw->type), err);
goto fail;
}
uc_fw->obj = obj;
uc_fw->size = fw->size;
uc_fw->fetch_status = INTEL_UC_FIRMWARE_SUCCESS;
DRM_DEBUG_DRIVER("%s fw fetch %s\n",
intel_uc_fw_type_repr(uc_fw->type),
intel_uc_fw_status_repr(uc_fw->fetch_status));
release_firmware(fw);
return;
fail:
uc_fw->fetch_status = INTEL_UC_FIRMWARE_FAIL;
DRM_DEBUG_DRIVER("%s fw fetch %s\n",
intel_uc_fw_type_repr(uc_fw->type),
intel_uc_fw_status_repr(uc_fw->fetch_status));
DRM_WARN("%s: Failed to fetch firmware %s (error %d)\n",
intel_uc_fw_type_repr(uc_fw->type), uc_fw->path, err);
DRM_INFO("%s: Firmware can be downloaded from %s\n",
intel_uc_fw_type_repr(uc_fw->type), INTEL_UC_FIRMWARE_URL);
release_firmware(fw); /* OK even if fw is NULL */
}
/**
* intel_uc_fw_upload - load uC firmware using custom loader
* @uc_fw: uC firmware
* @xfer: custom uC firmware loader function
*
* Loads uC firmware using custom loader and updates internal flags.
*
* Return: 0 on success, non-zero on failure.
*/
int intel_uc_fw_upload(struct intel_uc_fw *uc_fw,
int (*xfer)(struct intel_uc_fw *uc_fw,
struct i915_vma *vma))
{
struct drm_i915_private *i915 = to_i915(uc_fw->obj->base.dev);
struct i915_vma *vma;
int err;
DRM_DEBUG_DRIVER("%s fw load %s\n",
intel_uc_fw_type_repr(uc_fw->type), uc_fw->path);
if (uc_fw->fetch_status != INTEL_UC_FIRMWARE_SUCCESS)
return -ENOEXEC;
uc_fw->load_status = INTEL_UC_FIRMWARE_PENDING;
DRM_DEBUG_DRIVER("%s fw load %s\n",
intel_uc_fw_type_repr(uc_fw->type),
intel_uc_fw_status_repr(uc_fw->load_status));
/* Pin object with firmware */
err = i915_gem_object_set_to_gtt_domain(uc_fw->obj, false);
if (err) {
DRM_DEBUG_DRIVER("%s fw set-domain err=%d\n",
intel_uc_fw_type_repr(uc_fw->type), err);
goto fail;
}
vma = i915_gem_object_ggtt_pin(uc_fw->obj, NULL, 0, 0,
PIN_OFFSET_BIAS |
i915->guc.ggtt_pin_bias);
if (IS_ERR(vma)) {
err = PTR_ERR(vma);
DRM_DEBUG_DRIVER("%s fw ggtt-pin err=%d\n",
intel_uc_fw_type_repr(uc_fw->type), err);
goto fail;
}
/* Call custom loader */
err = xfer(uc_fw, vma);
/*
* We keep the object pages for reuse during resume. But we can unpin it
* now that DMA has completed, so it doesn't continue to take up space.
*/
i915_vma_unpin(vma);
if (err)
goto fail;
uc_fw->load_status = INTEL_UC_FIRMWARE_SUCCESS;
DRM_DEBUG_DRIVER("%s fw load %s\n",
intel_uc_fw_type_repr(uc_fw->type),
intel_uc_fw_status_repr(uc_fw->load_status));
DRM_INFO("%s: Loaded firmware %s (version %u.%u)\n",
intel_uc_fw_type_repr(uc_fw->type),
uc_fw->path,
uc_fw->major_ver_found, uc_fw->minor_ver_found);
return 0;
fail:
uc_fw->load_status = INTEL_UC_FIRMWARE_FAIL;
DRM_DEBUG_DRIVER("%s fw load %s\n",
intel_uc_fw_type_repr(uc_fw->type),
intel_uc_fw_status_repr(uc_fw->load_status));
DRM_WARN("%s: Failed to load firmware %s (error %d)\n",
intel_uc_fw_type_repr(uc_fw->type), uc_fw->path, err);
return err;
}
/**
* intel_uc_fw_fini - cleanup uC firmware
*
* @uc_fw: uC firmware
*
* Cleans up uC firmware by releasing the firmware GEM obj.
*/
void intel_uc_fw_fini(struct intel_uc_fw *uc_fw)
{
struct drm_i915_gem_object *obj;
obj = fetch_and_zero(&uc_fw->obj);
if (obj)
i915_gem_object_put(obj);
uc_fw->fetch_status = INTEL_UC_FIRMWARE_NONE;
}
/**
* intel_uc_fw_dump - dump information about uC firmware
* @uc_fw: uC firmware
* @p: the &drm_printer
*
* Pretty printer for uC firmware.
*/
void intel_uc_fw_dump(const struct intel_uc_fw *uc_fw, struct drm_printer *p)
{
drm_printf(p, "%s firmware: %s\n",
intel_uc_fw_type_repr(uc_fw->type), uc_fw->path);
drm_printf(p, "\tstatus: fetch %s, load %s\n",
intel_uc_fw_status_repr(uc_fw->fetch_status),
intel_uc_fw_status_repr(uc_fw->load_status));
drm_printf(p, "\tversion: wanted %u.%u, found %u.%u\n",
uc_fw->major_ver_wanted, uc_fw->minor_ver_wanted,
uc_fw->major_ver_found, uc_fw->minor_ver_found);
drm_printf(p, "\theader: offset %u, size %u\n",
uc_fw->header_offset, uc_fw->header_size);
drm_printf(p, "\tuCode: offset %u, size %u\n",
uc_fw->ucode_offset, uc_fw->ucode_size);
drm_printf(p, "\tRSA: offset %u, size %u\n",
uc_fw->rsa_offset, uc_fw->rsa_size);
}
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