drm/nv50-/disp: audit and version SOR_PWR method

The full object interfaces are about to be exposed to userspace, so we
need to check for any security-related issues and version the structs
to make it easier to handle any changes we may need in the future.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/core/engine/disp/nv50.c

@@ -903,6 +903,8 @@ nv50_disp_base_mthd(struct nouveau_object *object, u32 mthd,
 		return priv->dac.power(object, priv, data, size, head, outp);
 	case NV50_DISP_MTHD_V1_DAC_LOAD:
 		return priv->dac.sense(object, priv, data, size, head, outp);
+	case NV50_DISP_MTHD_V1_SOR_PWR:
+		return priv->sor.power(object, priv, data, size, head, outp);
 	default:
 		break;
 	}
@@ -1031,7 +1033,6 @@ nv50_disp_base_ofuncs = {
 static struct nouveau_omthds
 nv50_disp_base_omthds[] = {
 	{ HEAD_MTHD(NV50_DISP_SCANOUTPOS)     , nv50_disp_base_scanoutpos },
-	{ SOR_MTHD(NV50_DISP_SOR_PWR)         , nv50_sor_mthd },
 	{ SOR_MTHD(NV50_DISP_SOR_LVDS_SCRIPT) , nv50_sor_mthd },
 	{ PIOR_MTHD(NV50_DISP_PIOR_PWR)       , nv50_pior_mthd },
 	{ PIOR_MTHD(NV50_DISP_PIOR_TMDS_PWR)  , nv50_pior_mthd },

drivers/gpu/drm/nouveau/core/engine/disp/nv50.h

@@ -46,7 +46,7 @@ struct nv50_disp_priv {
 	} dac;
 	struct {
 		int nr;
-		int (*power)(struct nv50_disp_priv *, int sor, u32 data);
+		int (*power)(NV50_DISP_MTHD_V1);
 		int (*hda_eld)(struct nv50_disp_priv *, int sor, u8 *, u32);
 		int (*hdmi)(struct nv50_disp_priv *, int head, int sor, u32);
 		u32 lvdsconf;
@@ -78,7 +78,7 @@ int nva3_hdmi_ctrl(struct nv50_disp_priv *, int, int, u32);
 int nvd0_hdmi_ctrl(struct nv50_disp_priv *, int, int, u32);
 
 int nv50_sor_mthd(struct nouveau_object *, u32, void *, u32);
-int nv50_sor_power(struct nv50_disp_priv *, int, u32);
+int nv50_sor_power(NV50_DISP_MTHD_V1);
 
 int nv94_sor_dp_train_init(struct nv50_disp_priv *, int, int, int, u16, u16,
 		           u32, struct dcb_output *);

drivers/gpu/drm/nouveau/core/engine/disp/nv84.c

@@ -215,7 +215,6 @@ nv84_disp_sclass[] = {
 struct nouveau_omthds
 nv84_disp_base_omthds[] = {
 	{ HEAD_MTHD(NV50_DISP_SCANOUTPOS)     , nv50_disp_base_scanoutpos },
-	{ SOR_MTHD(NV50_DISP_SOR_PWR)         , nv50_sor_mthd },
 	{ SOR_MTHD(NV84_DISP_SOR_HDMI_PWR)    , nv50_sor_mthd },
 	{ SOR_MTHD(NV50_DISP_SOR_LVDS_SCRIPT) , nv50_sor_mthd },
 	{ PIOR_MTHD(NV50_DISP_PIOR_PWR)       , nv50_pior_mthd },

drivers/gpu/drm/nouveau/core/engine/disp/nv94.c

@@ -74,7 +74,6 @@ nv94_disp_sclass[] = {
 static struct nouveau_omthds
 nv94_disp_base_omthds[] = {
 	{ HEAD_MTHD(NV50_DISP_SCANOUTPOS)     , nv50_disp_base_scanoutpos },
-	{ SOR_MTHD(NV50_DISP_SOR_PWR)         , nv50_sor_mthd },
 	{ SOR_MTHD(NV84_DISP_SOR_HDMI_PWR)    , nv50_sor_mthd },
 	{ SOR_MTHD(NV50_DISP_SOR_LVDS_SCRIPT) , nv50_sor_mthd },
 	{ SOR_MTHD(NV94_DISP_SOR_DP_PWR)      , nv50_sor_mthd },

drivers/gpu/drm/nouveau/core/engine/disp/nva3.c

@@ -46,7 +46,6 @@ nva3_disp_sclass[] = {
 static struct nouveau_omthds
 nva3_disp_base_omthds[] = {
 	{ HEAD_MTHD(NV50_DISP_SCANOUTPOS)     , nv50_disp_base_scanoutpos },
-	{ SOR_MTHD(NV50_DISP_SOR_PWR)         , nv50_sor_mthd },
 	{ SOR_MTHD(NVA3_DISP_SOR_HDA_ELD)     , nv50_sor_mthd },
 	{ SOR_MTHD(NV84_DISP_SOR_HDMI_PWR)    , nv50_sor_mthd },
 	{ SOR_MTHD(NV50_DISP_SOR_LVDS_SCRIPT) , nv50_sor_mthd },

drivers/gpu/drm/nouveau/core/engine/disp/nvd0.c

@@ -712,7 +712,6 @@ nvd0_disp_base_ofuncs = {
 struct nouveau_omthds
 nvd0_disp_base_omthds[] = {
 	{ HEAD_MTHD(NV50_DISP_SCANOUTPOS)     , nvd0_disp_base_scanoutpos },
-	{ SOR_MTHD(NV50_DISP_SOR_PWR)         , nv50_sor_mthd },
 	{ SOR_MTHD(NVA3_DISP_SOR_HDA_ELD)     , nv50_sor_mthd },
 	{ SOR_MTHD(NV84_DISP_SOR_HDMI_PWR)    , nv50_sor_mthd },
 	{ SOR_MTHD(NV50_DISP_SOR_LVDS_SCRIPT) , nv50_sor_mthd },

drivers/gpu/drm/nouveau/core/engine/disp/sornv50.c

@@ -22,8 +22,10 @@
  * Authors: Ben Skeggs
  */
 
-#include <core/os.h>
+#include <core/client.h>
 #include <core/class.h>
+#include <nvif/unpack.h>
+#include <nvif/class.h>
 
 #include <subdev/bios.h>
 #include <subdev/bios/dcb.h>
@@ -32,10 +34,23 @@
 #include "nv50.h"
 
 int
-nv50_sor_power(struct nv50_disp_priv *priv, int or, u32 data)
+nv50_sor_power(NV50_DISP_MTHD_V1)
 {
-	const u32 stat = data & NV50_DISP_SOR_PWR_STATE;
-	const u32 soff = (or * 0x800);
+	union {
+		struct nv50_disp_sor_pwr_v0 v0;
+	} *args = data;
+	const u32 soff = outp->or * 0x800;
+	u32 stat;
+	int ret;
+
+	nv_ioctl(object, "disp sor pwr size %d\n", size);
+	if (nvif_unpack(args->v0, 0, 0, false)) {
+		nv_ioctl(object, "disp sor pwr vers %d state %d\n",
+			 args->v0.version, args->v0.state);
+		stat = !!args->v0.state;
+	} else
+		return ret;
+
 	nv_wait(priv, 0x61c004 + soff, 0x80000000, 0x00000000);
 	nv_mask(priv, 0x61c004 + soff, 0x80000001, 0x80000000 | stat);
 	nv_wait(priv, 0x61c004 + soff, 0x80000000, 0x00000000);
@@ -69,9 +84,6 @@ nv50_sor_mthd(struct nouveau_object *object, u32 mthd, void *args, u32 size)
 	}
 
 	switch (mthd & ~0x3f) {
-	case NV50_DISP_SOR_PWR:
-		ret = priv->sor.power(priv, or, data);
-		break;
 	case NVA3_DISP_SOR_HDA_ELD:
 		ret = priv->sor.hda_eld(priv, or, args, size);
 		break;

drivers/gpu/drm/nouveau/core/include/core/class.h

@@ -59,10 +59,6 @@ struct nv04_display_scanoutpos {
 #define NV50_DISP_SOR_MTHD_LINK                                      0x00000004
 #define NV50_DISP_SOR_MTHD_OR                                        0x00000003
 
-#define NV50_DISP_SOR_PWR                                            0x00010000
-#define NV50_DISP_SOR_PWR_STATE                                      0x00000001
-#define NV50_DISP_SOR_PWR_STATE_ON                                   0x00000001
-#define NV50_DISP_SOR_PWR_STATE_OFF                                  0x00000000
 #define NVA3_DISP_SOR_HDA_ELD                                        0x00010100
 #define NV84_DISP_SOR_HDMI_PWR                                       0x00012000
 #define NV84_DISP_SOR_HDMI_PWR_STATE                                 0x40000000

drivers/gpu/drm/nouveau/nv50_display.c

@@ -1482,7 +1482,6 @@ nv50_dac_dpms(struct drm_encoder *encoder, int mode)
 			      mode != DRM_MODE_DPMS_OFF),
 	};
 
-
 	nvif_mthd(disp->disp, 0, &args, sizeof(args));
 }
 
@@ -1742,8 +1741,18 @@ static void
 nv50_sor_dpms(struct drm_encoder *encoder, int mode)
 {
 	struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
+	struct nv50_disp *disp = nv50_disp(encoder->dev);
+	struct {
+		struct nv50_disp_mthd_v1 base;
+		struct nv50_disp_sor_pwr_v0 pwr;
+	} args = {
+		.base.version = 1,
+		.base.method = NV50_DISP_MTHD_V1_SOR_PWR,
+		.base.hasht  = nv_encoder->dcb->hasht,
+		.base.hashm  = nv_encoder->dcb->hashm,
+		.pwr.state = mode == DRM_MODE_DPMS_ON,
+	};
 	struct drm_device *dev = encoder->dev;
-	struct nv50_disp *disp = nv50_disp(dev);
 	struct drm_encoder *partner;
 	u32 mthd, data;
 
@@ -1768,15 +1777,14 @@ nv50_sor_dpms(struct drm_encoder *encoder, int mode)
 	mthd |= nv_encoder->or;
 
 	if (nv_encoder->dcb->type == DCB_OUTPUT_DP) {
-		data = 1;
-		nvif_exec(disp->disp, NV50_DISP_SOR_PWR | mthd, &data, sizeof(data));
+		args.pwr.state = 1;
+		nvif_mthd(disp->disp, 0, &args, sizeof(args));
+		data  = (mode == DRM_MODE_DPMS_ON);
 		mthd |= NV94_DISP_SOR_DP_PWR;
+		nvif_exec(disp->disp, mthd, &data, sizeof(data));
 	} else {
-		mthd |= NV50_DISP_SOR_PWR;
+		nvif_mthd(disp->disp, 0, &args, sizeof(args));
 	}
-
-	data = (mode == DRM_MODE_DPMS_ON);
-	nvif_exec(disp->disp, mthd, &data, sizeof(data));
 }
 
 static bool

drivers/gpu/drm/nouveau/nvif/class.h

@@ -340,4 +340,10 @@ struct nv50_disp_dac_load_v0 {
 	__u8  pad04[4];
 };
 
+struct nv50_disp_sor_pwr_v0 {
+	__u8  version;
+	__u8  state;
+	__u8  pad02[6];
+};
+
 #endif