Implement one ioctl action to allow user space driver to set its
user space context, so PXP can track the context id through this
user space context list.
Signed-off-by: Huang, Sean Z <sean.z.huang@xxxxxxxxx>
---
drivers/gpu/drm/i915/pxp/intel_pxp.c | 57 ++++++++++++++++++++
drivers/gpu/drm/i915/pxp/intel_pxp.h | 26 +++++++++
drivers/gpu/drm/i915/pxp/intel_pxp_context.c | 24 +++++++++
drivers/gpu/drm/i915/pxp/intel_pxp_context.h | 3 ++
4 files changed, 110 insertions(+)
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp.c b/drivers/gpu/drm/i915/pxp/intel_pxp.c
index d74a32b29716..ba473e1f4dde 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp.c
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp.c
@@ -8,6 +8,61 @@
#include "intel_pxp_context.h"
#include "intel_pxp_sm.h"
+int i915_pxp_ops_ioctl(struct drm_device *dev, void *data, struct drm_file *drmfile)
+{
+ int ret;
+ struct pxp_info pxp_info = {0};
+ struct drm_i915_pxp_ops *pxp_ops = data;
+ struct drm_i915_private *i915 = to_i915(dev);
+
+ if (!i915 || !i915->pxp.ctx || !drmfile || !pxp_ops ||
+ pxp_ops->info_size != sizeof(pxp_info))
+ return -EINVAL;
+
+ if (copy_from_user(&pxp_info, pxp_ops->info_ptr, sizeof(pxp_info)) != 0)
+ return -EFAULT;
+
+ mutex_lock(&i915->pxp.ctx->ctx_mutex);
+
+ if (i915->pxp.ctx->global_state_in_suspend) {
+ drm_err(&i915->drm, "Return failure due to state in suspend\n");
+ pxp_info.sm_status = PXP_SM_STATUS_SESSION_NOT_AVAILABLE;
+ ret = 0;
+ goto end;
+ }
+
+ if (i915->pxp.ctx->global_state_attacked) {
+ drm_err(&i915->drm, "Retry required due to state attacked\n");
+ pxp_info.sm_status = PXP_SM_STATUS_RETRY_REQUIRED;
+ ret = 0;
+ goto end;
+ }
+
+ switch (pxp_info.action) {
+ case PXP_ACTION_SET_USER_CONTEXT:
+ {
+ ret = intel_pxp_set_user_ctx(i915, pxp_info.set_user_ctx);
+ break;
+ }
+ default:
+ drm_err(&i915->drm, "Failed to %s due to bad params\n", __func__);
+ ret = -EINVAL;
+ goto end;
+ }
+
+end:
+ mutex_unlock(&i915->pxp.ctx->ctx_mutex);
+
+ if (ret == 0)
+ if (copy_to_user(pxp_ops->info_ptr, &pxp_info, sizeof(pxp_info)) != 0)
+ ret = -EFAULT;
+
+ if (ret)
+ dev_err(&dev->pdev->dev, "pid=%d, ret = %d\n", task_pid_nr(current), ret);
+
+ return ret;
+}
+
static void intel_pxp_write_irq_mask_reg(struct drm_i915_private *i915, u32 mask)
{
/* crypto mask is in bit31-16 (Engine1 Interrupt Mask) */
@@ -35,6 +90,8 @@ static int intel_pxp_teardown_required_callback(struct drm_i915_private *i915)
i915->pxp.ctx->global_state_attacked = true;
i915->pxp.ctx->flag_display_hm_surface_keys = false;
+ intel_pxp_destroy_user_ctx_list(i915);
+
mutex_unlock(&i915->pxp.ctx->ctx_mutex);
return 0;
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp.h b/drivers/gpu/drm/i915/pxp/intel_pxp.h
index eb0ec4a07d3d..132aeccf8447 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp.h
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp.h
@@ -24,6 +24,26 @@ enum pxp_sm_session_req {
PXP_SM_REQ_SESSION_TERMINATE
};
+#define PXP_ACTION_SET_USER_CONTEXT 5
+
+enum pxp_sm_status {
+ PXP_SM_STATUS_SUCCESS,
+ PXP_SM_STATUS_RETRY_REQUIRED,
+ PXP_SM_STATUS_SESSION_NOT_AVAILABLE,
+ PXP_SM_STATUS_ERROR_UNKNOWN
+};
+
+struct pxp_info {
+ u32 action;
+ u32 sm_status;
+ u32 set_user_ctx;
+} __attribute__((packed));
+
+struct drm_i915_pxp_ops {
+ struct pxp_info __user *info_ptr;
+ __u32 info_size;
+};
+
struct pxp_context;
struct intel_pxp {
@@ -38,6 +58,7 @@ struct intel_gt;
struct drm_i915_private;
#ifdef CONFIG_DRM_I915_PXP
+int i915_pxp_ops_ioctl(struct drm_device *dev, void *data, struct drm_file *drmfile);
void intel_pxp_irq_handler(struct intel_gt *gt, u16 iir);
int i915_pxp_teardown_required_callback(struct drm_i915_private *i915);
int i915_pxp_global_terminate_complete_callback(struct drm_i915_private *i915);
@@ -45,6 +66,11 @@ int i915_pxp_global_terminate_complete_callback(struct drm_i915_private *i915);
int intel_pxp_init(struct drm_i915_private *i915);
void intel_pxp_uninit(struct drm_i915_private *i915);
#else
+static inline int i915_pxp_ops_ioctl(struct drm_device *dev, void *data, struct drm_file *drmfile)
+{
+ return 0;
+}
+
static inline void intel_pxp_irq_handler(struct intel_gt *gt, u16 iir)
{
}
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_context.c b/drivers/gpu/drm/i915/pxp/intel_pxp_context.c
index c340c375daac..7fc99567b3ac 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp_context.c
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp_context.c
@@ -43,3 +43,27 @@ void intel_pxp_destroy_ctx(struct drm_i915_private *i915)
kfree(i915->pxp.ctx);
i915->pxp.ctx = NULL;
}
+
+int intel_pxp_set_user_ctx(struct drm_i915_private *i915, u32 user_ctx_in)
+{
+ struct pxp_user_ctx *user_ctx;
+
+ user_ctx = kzalloc(sizeof(*user_ctx), GFP_KERNEL);
+ if (!user_ctx)
+ return -ENOMEM;
+
+ user_ctx->user_ctx = user_ctx_in;
+
+ list_add(&user_ctx->listhead, &i915->pxp.ctx->user_ctx_list);
+ return 0;
+}
+
+void intel_pxp_destroy_user_ctx_list(struct drm_i915_private *i915)
+{
+ struct pxp_user_ctx *user_ctx, *n;
+
+ list_for_each_entry_safe(user_ctx, n, &i915->pxp.ctx->user_ctx_list, listhead) {
+ list_del(&user_ctx->listhead);
+ kfree(user_ctx);
+ }
+}
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_context.h b/drivers/gpu/drm/i915/pxp/intel_pxp_context.h
index e0794dfb548d..c8b2d89e6548 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp_context.h
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp_context.h
@@ -41,4 +41,7 @@ struct pxp_user_ctx {
struct pxp_context *intel_pxp_create_ctx(struct drm_i915_private *i915);
void intel_pxp_destroy_ctx(struct drm_i915_private *i915);
+int intel_pxp_set_user_ctx(struct drm_i915_private *i915, u32 user_ctx);
+void intel_pxp_destroy_user_ctx_list(struct drm_i915_private *i915);
+
#endif /* __INTEL_PXP_CONTEXT_H__ */
--
2.17.1
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