diff options
| -rw-r--r-- | drivers/gpu/drm/drm_hdcp.c | 158 | ||||
| -rw-r--r-- | drivers/gpu/drm/drm_internal.h | 4 | ||||
| -rw-r--r-- | drivers/gpu/drm/drm_sysfs.c | 2 | ||||
| -rw-r--r-- | include/drm/drm_hdcp.h | 4 |
4 files changed, 61 insertions, 107 deletions
diff --git a/drivers/gpu/drm/drm_hdcp.c b/drivers/gpu/drm/drm_hdcp.c index 9191633a3c43..7f386adcf872 100644 --- a/drivers/gpu/drm/drm_hdcp.c +++ b/drivers/gpu/drm/drm_hdcp.c @@ -23,14 +23,6 @@ #include "drm_internal.h" -static struct hdcp_srm { - u32 revoked_ksv_cnt; - u8 *revoked_ksv_list; - - /* Mutex to protect above struct member */ - struct mutex mutex; -} *srm_data; - static inline void drm_hdcp_print_ksv(const u8 *ksv) { DRM_DEBUG("\t%#02x, %#02x, %#02x, %#02x, %#02x\n", @@ -60,11 +52,11 @@ static u32 drm_hdcp_get_revoked_ksv_count(const u8 *buf, u32 vrls_length) return ksv_count; } -static u32 drm_hdcp_get_revoked_ksvs(const u8 *buf, u8 *revoked_ksv_list, +static u32 drm_hdcp_get_revoked_ksvs(const u8 *buf, u8 **revoked_ksv_list, u32 vrls_length) { - u32 parsed_bytes = 0, ksv_count = 0; u32 vrl_ksv_cnt, vrl_ksv_sz, vrl_idx = 0; + u32 parsed_bytes = 0, ksv_count = 0; do { vrl_ksv_cnt = *buf; @@ -74,10 +66,10 @@ static u32 drm_hdcp_get_revoked_ksvs(const u8 *buf, u8 *revoked_ksv_list, DRM_DEBUG("vrl: %d, Revoked KSVs: %d\n", vrl_idx++, vrl_ksv_cnt); - memcpy(revoked_ksv_list, buf, vrl_ksv_sz); + memcpy((*revoked_ksv_list) + (ksv_count * DRM_HDCP_KSV_LEN), + buf, vrl_ksv_sz); ksv_count += vrl_ksv_cnt; - revoked_ksv_list += vrl_ksv_sz; buf += vrl_ksv_sz; parsed_bytes += (vrl_ksv_sz + 1); @@ -91,7 +83,8 @@ static inline u32 get_vrl_length(const u8 *buf) return drm_hdcp_be24_to_cpu(buf); } -static int drm_hdcp_parse_hdcp1_srm(const u8 *buf, size_t count) +static int drm_hdcp_parse_hdcp1_srm(const u8 *buf, size_t count, + u8 **revoked_ksv_list, u32 *revoked_ksv_cnt) { struct hdcp_srm_header *header; u32 vrl_length, ksv_count; @@ -131,29 +124,28 @@ static int drm_hdcp_parse_hdcp1_srm(const u8 *buf, size_t count) ksv_count = drm_hdcp_get_revoked_ksv_count(buf, vrl_length); if (!ksv_count) { DRM_DEBUG("Revoked KSV count is 0\n"); - return count; + return 0; } - kfree(srm_data->revoked_ksv_list); - srm_data->revoked_ksv_list = kcalloc(ksv_count, DRM_HDCP_KSV_LEN, - GFP_KERNEL); - if (!srm_data->revoked_ksv_list) { + *revoked_ksv_list = kcalloc(ksv_count, DRM_HDCP_KSV_LEN, GFP_KERNEL); + if (!*revoked_ksv_list) { DRM_ERROR("Out of Memory\n"); return -ENOMEM; } - if (drm_hdcp_get_revoked_ksvs(buf, srm_data->revoked_ksv_list, + if (drm_hdcp_get_revoked_ksvs(buf, revoked_ksv_list, vrl_length) != ksv_count) { - srm_data->revoked_ksv_cnt = 0; - kfree(srm_data->revoked_ksv_list); + *revoked_ksv_cnt = 0; + kfree(*revoked_ksv_list); return -EINVAL; } - srm_data->revoked_ksv_cnt = ksv_count; - return count; + *revoked_ksv_cnt = ksv_count; + return 0; } -static int drm_hdcp_parse_hdcp2_srm(const u8 *buf, size_t count) +static int drm_hdcp_parse_hdcp2_srm(const u8 *buf, size_t count, + u8 **revoked_ksv_list, u32 *revoked_ksv_cnt) { struct hdcp_srm_header *header; u32 vrl_length, ksv_count, ksv_sz; @@ -195,13 +187,11 @@ static int drm_hdcp_parse_hdcp2_srm(const u8 *buf, size_t count) ksv_count = (*buf << 2) | DRM_HDCP_2_KSV_COUNT_2_LSBITS(*(buf + 1)); if (!ksv_count) { DRM_DEBUG("Revoked KSV count is 0\n"); - return count; + return 0; } - kfree(srm_data->revoked_ksv_list); - srm_data->revoked_ksv_list = kcalloc(ksv_count, DRM_HDCP_KSV_LEN, - GFP_KERNEL); - if (!srm_data->revoked_ksv_list) { + *revoked_ksv_list = kcalloc(ksv_count, DRM_HDCP_KSV_LEN, GFP_KERNEL); + if (!*revoked_ksv_list) { DRM_ERROR("Out of Memory\n"); return -ENOMEM; } @@ -210,10 +200,10 @@ static int drm_hdcp_parse_hdcp2_srm(const u8 *buf, size_t count) buf += DRM_HDCP_2_NO_OF_DEV_PLUS_RESERVED_SZ; DRM_DEBUG("Revoked KSVs: %d\n", ksv_count); - memcpy(srm_data->revoked_ksv_list, buf, ksv_sz); + memcpy(*revoked_ksv_list, buf, ksv_sz); - srm_data->revoked_ksv_cnt = ksv_count; - return count; + *revoked_ksv_cnt = ksv_count; + return 0; } static inline bool is_srm_version_hdcp1(const u8 *buf) @@ -226,22 +216,27 @@ static inline bool is_srm_version_hdcp2(const u8 *buf) return *buf == (u8)(DRM_HDCP_2_SRM_ID << 4 | DRM_HDCP_2_INDICATOR); } -static void drm_hdcp_srm_update(const u8 *buf, size_t count) +static int drm_hdcp_srm_update(const u8 *buf, size_t count, + u8 **revoked_ksv_list, u32 *revoked_ksv_cnt) { if (count < sizeof(struct hdcp_srm_header)) - return; + return -EINVAL; if (is_srm_version_hdcp1(buf)) - drm_hdcp_parse_hdcp1_srm(buf, count); + return drm_hdcp_parse_hdcp1_srm(buf, count, revoked_ksv_list, + revoked_ksv_cnt); else if (is_srm_version_hdcp2(buf)) - drm_hdcp_parse_hdcp2_srm(buf, count); + return drm_hdcp_parse_hdcp2_srm(buf, count, revoked_ksv_list, + revoked_ksv_cnt); + else + return -EINVAL; } -static void drm_hdcp_request_srm(struct drm_device *drm_dev) +static int drm_hdcp_request_srm(struct drm_device *drm_dev, + u8 **revoked_ksv_list, u32 *revoked_ksv_cnt) { char fw_name[36] = "display_hdcp_srm.bin"; const struct firmware *fw; - int ret; ret = request_firmware_direct(&fw, (const char *)fw_name, @@ -250,10 +245,12 @@ static void drm_hdcp_request_srm(struct drm_device *drm_dev) goto exit; if (fw->size && fw->data) - drm_hdcp_srm_update(fw->data, fw->size); + ret = drm_hdcp_srm_update(fw->data, fw->size, revoked_ksv_list, + revoked_ksv_cnt); exit: release_firmware(fw); + return ret; } /** @@ -279,71 +276,34 @@ exit: * https://www.digital-cp.com/sites/default/files/specifications/HDCP%20on%20HDMI%20Specification%20Rev2_2_Final1.pdf * * Returns: - * TRUE on any of the KSV is revoked, else FALSE. + * Count of the revoked KSVs or -ve error number incase of the failure. */ -bool drm_hdcp_check_ksvs_revoked(struct drm_device *drm_dev, u8 *ksvs, - u32 ksv_count) +int drm_hdcp_check_ksvs_revoked(struct drm_device *drm_dev, u8 *ksvs, + u32 ksv_count) { - u32 rev_ksv_cnt, cnt, i, j; - u8 *rev_ksv_list; - - if (!srm_data) - return false; - - mutex_lock(&srm_data->mutex); - drm_hdcp_request_srm(drm_dev); - - rev_ksv_cnt = srm_data->revoked_ksv_cnt; - rev_ksv_list = srm_data->revoked_ksv_list; - - /* If the Revoked ksv list is empty */ - if (!rev_ksv_cnt || !rev_ksv_list) { - mutex_unlock(&srm_data->mutex); - return false; - } - - for (cnt = 0; cnt < ksv_count; cnt++) { - rev_ksv_list = srm_data->revoked_ksv_list; - for (i = 0; i < rev_ksv_cnt; i++) { - for (j = 0; j < DRM_HDCP_KSV_LEN; j++) - if (ksvs[j] != rev_ksv_list[j]) { - break; - } else if (j == (DRM_HDCP_KSV_LEN - 1)) { - DRM_DEBUG("Revoked KSV is "); - drm_hdcp_print_ksv(ksvs); - mutex_unlock(&srm_data->mutex); - return true; - } - /* Move the offset to next KSV in the revoked list */ - rev_ksv_list += DRM_HDCP_KSV_LEN; - } - - /* Iterate to next ksv_offset */ - ksvs += DRM_HDCP_KSV_LEN; - } - mutex_unlock(&srm_data->mutex); - return false; + u32 revoked_ksv_cnt = 0, i, j; + u8 *revoked_ksv_list = NULL; + int ret = 0; + + ret = drm_hdcp_request_srm(drm_dev, &revoked_ksv_list, + &revoked_ksv_cnt); + + /* revoked_ksv_cnt will be zero when above function failed */ + for (i = 0; i < revoked_ksv_cnt; i++) + for (j = 0; j < ksv_count; j++) + if (!memcmp(&ksvs[j * DRM_HDCP_KSV_LEN], + &revoked_ksv_list[i * DRM_HDCP_KSV_LEN], + DRM_HDCP_KSV_LEN)) { + DRM_DEBUG("Revoked KSV is "); + drm_hdcp_print_ksv(&ksvs[j * DRM_HDCP_KSV_LEN]); + ret++; + } + + kfree(revoked_ksv_list); + return ret; } EXPORT_SYMBOL_GPL(drm_hdcp_check_ksvs_revoked); -int drm_setup_hdcp_srm(struct class *drm_class) -{ - srm_data = kzalloc(sizeof(*srm_data), GFP_KERNEL); - if (!srm_data) - return -ENOMEM; - mutex_init(&srm_data->mutex); - - return 0; -} - -void drm_teardown_hdcp_srm(struct class *drm_class) -{ - if (srm_data) { - kfree(srm_data->revoked_ksv_list); - kfree(srm_data); - } -} - static struct drm_prop_enum_list drm_cp_enum_list[] = { { DRM_MODE_CONTENT_PROTECTION_UNDESIRED, "Undesired" }, { DRM_MODE_CONTENT_PROTECTION_DESIRED, "Desired" }, diff --git a/drivers/gpu/drm/drm_internal.h b/drivers/gpu/drm/drm_internal.h index aeec2e68d772..5714a78365ac 100644 --- a/drivers/gpu/drm/drm_internal.h +++ b/drivers/gpu/drm/drm_internal.h @@ -236,7 +236,3 @@ int drm_syncobj_query_ioctl(struct drm_device *dev, void *data, void drm_framebuffer_print_info(struct drm_printer *p, unsigned int indent, const struct drm_framebuffer *fb); int drm_framebuffer_debugfs_init(struct drm_minor *minor); - -/* drm_hdcp.c */ -int drm_setup_hdcp_srm(struct class *drm_class); -void drm_teardown_hdcp_srm(struct class *drm_class); diff --git a/drivers/gpu/drm/drm_sysfs.c b/drivers/gpu/drm/drm_sysfs.c index dd2bc85f43cc..2e83c3d72af9 100644 --- a/drivers/gpu/drm/drm_sysfs.c +++ b/drivers/gpu/drm/drm_sysfs.c @@ -85,7 +85,6 @@ int drm_sysfs_init(void) } drm_class->devnode = drm_devnode; - drm_setup_hdcp_srm(drm_class); return 0; } @@ -98,7 +97,6 @@ void drm_sysfs_destroy(void) { if (IS_ERR_OR_NULL(drm_class)) return; - drm_teardown_hdcp_srm(drm_class); class_remove_file(drm_class, &class_attr_version.attr); class_destroy(drm_class); drm_class = NULL; diff --git a/include/drm/drm_hdcp.h b/include/drm/drm_hdcp.h index 06a11202a097..d512089b873f 100644 --- a/include/drm/drm_hdcp.h +++ b/include/drm/drm_hdcp.h @@ -288,8 +288,8 @@ struct hdcp_srm_header { struct drm_device; struct drm_connector; -bool drm_hdcp_check_ksvs_revoked(struct drm_device *dev, - u8 *ksvs, u32 ksv_count); +int drm_hdcp_check_ksvs_revoked(struct drm_device *dev, + u8 *ksvs, u32 ksv_count); int drm_connector_attach_content_protection_property( struct drm_connector *connector, bool hdcp_content_type); void drm_hdcp_update_content_protection(struct drm_connector *connector, |