From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jordan Crouse <jcrouse@codeaurora.org>
Subject: [PATCH 05/11] drm/msm: get an iova from the address space instead of an id
Date: Mon,  6 Feb 2017 10:39:33 -0700
Message-ID: <1486402779-9024-6-git-send-email-jcrouse@codeaurora.org>
References: <1486402779-9024-1-git-send-email-jcrouse@codeaurora.org>
Return-path: <linux-arm-msm-owner@vger.kernel.org>
In-Reply-To: <1486402779-9024-1-git-send-email-jcrouse@codeaurora.org>
Sender: linux-arm-msm-owner@vger.kernel.org
To: freedreno@lists.freedesktop.org
Cc: linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org
List-Id: dri-devel@lists.freedesktop.org

In the future we won't have a fixed set of addresses spaces.
Instead of going through the effort of assigning a ID for each
address space just use the address space itself as a token for
getting / putting an iova.

This forces a few changes in the gem object however: instead
of using a simple index into a list of domains, we need to
maintain a list of them. Luckily the list will be pretty small;
even with dynamic address spaces we wouldn't ever see more than
two or three.

Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
---
 drivers/gpu/drm/msm/adreno/a5xx_gpu.c     |   8 +-
 drivers/gpu/drm/msm/adreno/a5xx_power.c   |   5 +-
 drivers/gpu/drm/msm/adreno/adreno_gpu.c   |   6 +-
 drivers/gpu/drm/msm/dsi/dsi_host.c        |  15 +++-
 drivers/gpu/drm/msm/mdp/mdp4/mdp4_crtc.c  |   8 +-
 drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.c   |  18 ++---
 drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.h   |   3 -
 drivers/gpu/drm/msm/mdp/mdp4/mdp4_plane.c |  13 ++--
 drivers/gpu/drm/msm/mdp/mdp5/mdp5_crtc.c  |   5 +-
 drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c   |  11 +--
 drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.h   |   4 -
 drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c |  13 ++--
 drivers/gpu/drm/msm/msm_drv.c             |  14 ----
 drivers/gpu/drm/msm/msm_drv.h             |  25 +++---
 drivers/gpu/drm/msm/msm_fb.c              |  15 ++--
 drivers/gpu/drm/msm/msm_fbdev.c           |  10 ++-
 drivers/gpu/drm/msm/msm_gem.c             | 124 +++++++++++++++++++++---------
 drivers/gpu/drm/msm/msm_gem.h             |   4 +-
 drivers/gpu/drm/msm/msm_gem_submit.c      |   4 +-
 drivers/gpu/drm/msm/msm_gpu.c             |   8 +-
 drivers/gpu/drm/msm/msm_gpu.h             |   1 -
 drivers/gpu/drm/msm/msm_kms.h             |   3 +
 22 files changed, 184 insertions(+), 133 deletions(-)

diff --git a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
index 2074f64..546280c 100644
--- a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
@@ -415,7 +415,7 @@ static struct drm_gem_object *a5xx_ucode_load_bo(struct msm_gpu *gpu,
 	}
 
 	if (iova) {
-		int ret = msm_gem_get_iova(bo, gpu->id, iova);
+		int ret = msm_gem_get_iova(bo, gpu->aspace, iova);
 
 		if (ret) {
 			drm_gem_object_unreference_unlocked(bo);
@@ -757,19 +757,19 @@ static void a5xx_destroy(struct msm_gpu *gpu)
 
 	if (a5xx_gpu->pm4_bo) {
 		if (a5xx_gpu->pm4_iova)
-			msm_gem_put_iova(a5xx_gpu->pm4_bo, gpu->id);
+			msm_gem_put_iova(a5xx_gpu->pm4_bo, gpu->aspace);
 		drm_gem_object_unreference_unlocked(a5xx_gpu->pm4_bo);
 	}
 
 	if (a5xx_gpu->pfp_bo) {
 		if (a5xx_gpu->pfp_iova)
-			msm_gem_put_iova(a5xx_gpu->pfp_bo, gpu->id);
+			msm_gem_put_iova(a5xx_gpu->pfp_bo, gpu->aspace);
 		drm_gem_object_unreference_unlocked(a5xx_gpu->pfp_bo);
 	}
 
 	if (a5xx_gpu->gpmu_bo) {
 		if (a5xx_gpu->gpmu_bo)
-			msm_gem_put_iova(a5xx_gpu->gpmu_bo, gpu->id);
+			msm_gem_put_iova(a5xx_gpu->gpmu_bo, gpu->aspace);
 		drm_gem_object_unreference_unlocked(a5xx_gpu->gpmu_bo);
 	}
 
diff --git a/drivers/gpu/drm/msm/adreno/a5xx_power.c b/drivers/gpu/drm/msm/adreno/a5xx_power.c
index ed0802e..2fdee44 100644
--- a/drivers/gpu/drm/msm/adreno/a5xx_power.c
+++ b/drivers/gpu/drm/msm/adreno/a5xx_power.c
@@ -301,7 +301,8 @@ void a5xx_gpmu_ucode_init(struct msm_gpu *gpu)
 	if (IS_ERR(a5xx_gpu->gpmu_bo))
 		goto err;
 
-	if (msm_gem_get_iova(a5xx_gpu->gpmu_bo, gpu->id, &a5xx_gpu->gpmu_iova))
+	if (msm_gem_get_iova(a5xx_gpu->gpmu_bo, gpu->aspace,
+		&a5xx_gpu->gpmu_iova))
 		goto err;
 
 	ptr = msm_gem_get_vaddr(a5xx_gpu->gpmu_bo);
@@ -330,7 +331,7 @@ void a5xx_gpmu_ucode_init(struct msm_gpu *gpu)
 
 err:
 	if (a5xx_gpu->gpmu_iova)
-		msm_gem_put_iova(a5xx_gpu->gpmu_bo, gpu->id);
+		msm_gem_put_iova(a5xx_gpu->gpmu_bo, gpu->aspace);
 	if (a5xx_gpu->gpmu_bo)
 		drm_gem_object_unreference_unlocked(a5xx_gpu->gpmu_bo);
 
diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
index acb685a..247f017 100644
--- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
@@ -61,7 +61,7 @@ int adreno_hw_init(struct msm_gpu *gpu)
 
 	DBG("%s", gpu->name);
 
-	ret = msm_gem_get_iova(gpu->rb->bo, gpu->id, &gpu->rb_iova);
+	ret = msm_gem_get_iova(gpu->rb->bo, gpu->aspace, &gpu->rb_iova);
 	if (ret) {
 		gpu->rb_iova = 0;
 		dev_err(gpu->dev->dev, "could not map ringbuffer: %d\n", ret);
@@ -411,7 +411,7 @@ int adreno_gpu_init(struct drm_device *drm, struct platform_device *pdev,
 		return -ENOMEM;
 	}
 
-	ret = msm_gem_get_iova(adreno_gpu->memptrs_bo, gpu->id,
+	ret = msm_gem_get_iova(adreno_gpu->memptrs_bo, gpu->aspace,
 			&adreno_gpu->memptrs_iova);
 	if (ret) {
 		dev_err(drm->dev, "could not map memptrs: %d\n", ret);
@@ -430,7 +430,7 @@ void adreno_gpu_cleanup(struct adreno_gpu *adreno_gpu)
 			msm_gem_put_vaddr(adreno_gpu->memptrs_bo);
 
 		if (adreno_gpu->memptrs_iova)
-			msm_gem_put_iova(adreno_gpu->memptrs_bo, gpu->id);
+			msm_gem_put_iova(adreno_gpu->memptrs_bo, gpu->aspace);
 
 		drm_gem_object_unreference_unlocked(adreno_gpu->memptrs_bo);
 	}
diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
index 3819fde..0b24b37 100644
--- a/drivers/gpu/drm/msm/dsi/dsi_host.c
+++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
@@ -28,6 +28,7 @@
 #include <linux/regmap.h>
 #include <video/mipi_display.h>
 
+#include "msm_kms.h"
 #include "dsi.h"
 #include "dsi.xml.h"
 #include "sfpb.xml.h"
@@ -980,6 +981,7 @@ static void dsi_wait4video_eng_busy(struct msm_dsi_host *msm_host)
 static int dsi_tx_buf_alloc(struct msm_dsi_host *msm_host, int size)
 {
 	struct drm_device *dev = msm_host->dev;
+	struct msm_drm_private *priv = dev->dev_private;
 	const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
 	int ret;
 	uint64_t iova;
@@ -996,7 +998,13 @@ static int dsi_tx_buf_alloc(struct msm_dsi_host *msm_host, int size)
 			return ret;
 		}
 
-		ret = msm_gem_get_iova_locked(msm_host->tx_gem_obj, 0, &iova);
+		if (!priv->kms) {
+			pr_err("%s: No KMS is initalized\n", __func__);
+			return -ENODEV;
+		}
+
+		ret = msm_gem_get_iova_locked(msm_host->tx_gem_obj,
+			priv->kms->aspace, &iova);
 		mutex_unlock(&dev->struct_mutex);
 		if (ret) {
 			pr_err("%s: failed to get iova, %d\n", __func__, ret);
@@ -1028,9 +1036,12 @@ static int dsi_tx_buf_alloc(struct msm_dsi_host *msm_host, int size)
 static void dsi_tx_buf_free(struct msm_dsi_host *msm_host)
 {
 	struct drm_device *dev = msm_host->dev;
+	struct msm_drm_private *priv = dev->dev_private;
 
 	if (msm_host->tx_gem_obj) {
-		msm_gem_put_iova(msm_host->tx_gem_obj, 0);
+		if (priv->kms)
+			msm_gem_put_iova(msm_host->tx_gem_obj,
+				priv->kms->aspace);
 		mutex_lock(&dev->struct_mutex);
 		msm_gem_free_object(msm_host->tx_gem_obj);
 		msm_host->tx_gem_obj = NULL;
diff --git a/drivers/gpu/drm/msm/mdp/mdp4/mdp4_crtc.c b/drivers/gpu/drm/msm/mdp/mdp4/mdp4_crtc.c
index 1c29618..1dfad91 100644
--- a/drivers/gpu/drm/msm/mdp/mdp4/mdp4_crtc.c
+++ b/drivers/gpu/drm/msm/mdp/mdp4/mdp4_crtc.c
@@ -133,7 +133,7 @@ static void unref_cursor_worker(struct drm_flip_work *work, void *val)
 		container_of(work, struct mdp4_crtc, unref_cursor_work);
 	struct mdp4_kms *mdp4_kms = get_kms(&mdp4_crtc->base);
 
-	msm_gem_put_iova(val, mdp4_kms->id);
+	msm_gem_put_iova(val, mdp4_kms->base.base.aspace);
 	drm_gem_object_unreference_unlocked(val);
 }
 
@@ -378,7 +378,8 @@ static void update_cursor(struct drm_crtc *crtc)
 		if (next_bo) {
 			/* take a obj ref + iova ref when we start scanning out: */
 			drm_gem_object_reference(next_bo);
-			msm_gem_get_iova_locked(next_bo, mdp4_kms->id, &iova);
+			msm_gem_get_iova_locked(next_bo,
+				mdp4_kms->base.base.aspace, &iova);
 
 			/* enable cursor: */
 			mdp4_write(mdp4_kms, REG_MDP4_DMA_CURSOR_SIZE(dma),
@@ -435,7 +436,8 @@ static int mdp4_crtc_cursor_set(struct drm_crtc *crtc,
 	}
 
 	if (cursor_bo) {
-		ret = msm_gem_get_iova(cursor_bo, mdp4_kms->id, &iova);
+		ret = msm_gem_get_iova(cursor_bo, mdp4_kms->base.base.aspace,
+			&iova);
 		if (ret)
 			goto fail;
 	} else {
diff --git a/drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.c b/drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.c
index dbdbc2a..50144db 100644
--- a/drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.c
+++ b/drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.c
@@ -160,7 +160,10 @@ static void mdp4_destroy(struct msm_kms *kms)
 {
 	struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
 	struct device *dev = mdp4_kms->dev->dev;
-	struct msm_gem_address_space *aspace = mdp4_kms->aspace;
+	struct msm_gem_address_space *aspace = kms->aspace;
+
+	if (mdp4_kms->blank_cursor_iova)
+		msm_gem_put_iova(mdp4_kms->blank_cursor_bo, aspace);
 
 	if (aspace) {
 		aspace->mmu->funcs->detach(aspace->mmu,
@@ -168,8 +171,6 @@ static void mdp4_destroy(struct msm_kms *kms)
 		msm_gem_address_space_destroy(aspace);
 	}
 
-	if (mdp4_kms->blank_cursor_iova)
-		msm_gem_put_iova(mdp4_kms->blank_cursor_bo, mdp4_kms->id);
 	drm_gem_object_unreference_unlocked(mdp4_kms->blank_cursor_bo);
 
 	if (mdp4_kms->rpm_enabled)
@@ -540,7 +541,7 @@ struct msm_kms *mdp4_kms_init(struct drm_device *dev)
 			goto fail;
 		}
 
-		mdp4_kms->aspace = aspace;
+		kms->aspace = aspace;
 
 		ret = aspace->mmu->funcs->attach(aspace->mmu, iommu_ports,
 				ARRAY_SIZE(iommu_ports));
@@ -552,13 +553,6 @@ struct msm_kms *mdp4_kms_init(struct drm_device *dev)
 		aspace = NULL;
 	}
 
-	mdp4_kms->id = msm_register_address_space(dev, aspace);
-	if (mdp4_kms->id < 0) {
-		ret = mdp4_kms->id;
-		dev_err(dev->dev, "failed to register mdp4 iommu: %d\n", ret);
-		goto fail;
-	}
-
 	ret = modeset_init(mdp4_kms);
 	if (ret) {
 		dev_err(dev->dev, "modeset_init failed: %d\n", ret);
@@ -575,7 +569,7 @@ struct msm_kms *mdp4_kms_init(struct drm_device *dev)
 		goto fail;
 	}
 
-	ret = msm_gem_get_iova(mdp4_kms->blank_cursor_bo, mdp4_kms->id,
+	ret = msm_gem_get_iova(mdp4_kms->blank_cursor_bo, kms->aspace,
 			&mdp4_kms->blank_cursor_iova);
 	if (ret) {
 		dev_err(dev->dev, "could not pin blank-cursor bo: %d\n", ret);
diff --git a/drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.h b/drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.h
index 62712ca..e9a129d 100644
--- a/drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.h
+++ b/drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.h
@@ -33,8 +33,6 @@ struct mdp4_kms {
 	int rev;
 
 	/* mapper-id used to request GEM buffer mapped for scanout: */
-	int id;
-
 	void __iomem *mmio;
 
 	struct regulator *vdd;
@@ -43,7 +41,6 @@ struct mdp4_kms {
 	struct clk *pclk;
 	struct clk *lut_clk;
 	struct clk *axi_clk;
-	struct msm_gem_address_space *aspace;
 
 	struct mdp_irq error_handler;
 
diff --git a/drivers/gpu/drm/msm/mdp/mdp4/mdp4_plane.c b/drivers/gpu/drm/msm/mdp/mdp4/mdp4_plane.c
index 3903dbc..88f3b86 100644
--- a/drivers/gpu/drm/msm/mdp/mdp4/mdp4_plane.c
+++ b/drivers/gpu/drm/msm/mdp/mdp4/mdp4_plane.c
@@ -109,7 +109,7 @@ static int mdp4_plane_prepare_fb(struct drm_plane *plane,
 		return 0;
 
 	DBG("%s: prepare: FB[%u]", mdp4_plane->name, fb->base.id);
-	return msm_framebuffer_prepare(fb, mdp4_kms->id);
+	return msm_framebuffer_prepare(fb, mdp4_kms->base.base.aspace);
 }
 
 static void mdp4_plane_cleanup_fb(struct drm_plane *plane,
@@ -123,7 +123,7 @@ static void mdp4_plane_cleanup_fb(struct drm_plane *plane,
 		return;
 
 	DBG("%s: cleanup: FB[%u]", mdp4_plane->name, fb->base.id);
-	msm_framebuffer_cleanup(fb, mdp4_kms->id);
+	msm_framebuffer_cleanup(fb, mdp4_kms->base.base.aspace);
 }
 
 
@@ -161,6 +161,7 @@ static void mdp4_plane_set_scanout(struct drm_plane *plane,
 {
 	struct mdp4_plane *mdp4_plane = to_mdp4_plane(plane);
 	struct mdp4_kms *mdp4_kms = get_kms(plane);
+	struct msm_kms *kms = &mdp4_kms->base.base;
 	enum mdp4_pipe pipe = mdp4_plane->pipe;
 
 	mdp4_write(mdp4_kms, REG_MDP4_PIPE_SRC_STRIDE_A(pipe),
@@ -172,13 +173,13 @@ static void mdp4_plane_set_scanout(struct drm_plane *plane,
 			MDP4_PIPE_SRC_STRIDE_B_P3(fb->pitches[3]));
 
 	mdp4_write(mdp4_kms, REG_MDP4_PIPE_SRCP0_BASE(pipe),
-			msm_framebuffer_iova(fb, mdp4_kms->id, 0));
+			msm_framebuffer_iova(fb, kms->aspace, 0));
 	mdp4_write(mdp4_kms, REG_MDP4_PIPE_SRCP1_BASE(pipe),
-			msm_framebuffer_iova(fb, mdp4_kms->id, 1));
+			msm_framebuffer_iova(fb, kms->aspace, 1));
 	mdp4_write(mdp4_kms, REG_MDP4_PIPE_SRCP2_BASE(pipe),
-			msm_framebuffer_iova(fb, mdp4_kms->id, 2));
+			msm_framebuffer_iova(fb, kms->aspace, 2));
 	mdp4_write(mdp4_kms, REG_MDP4_PIPE_SRCP3_BASE(pipe),
-			msm_framebuffer_iova(fb, mdp4_kms->id, 3));
+			msm_framebuffer_iova(fb, kms->aspace, 3));
 
 	plane->fb = fb;
 }
diff --git a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_crtc.c b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_crtc.c
index 8e155a5..17e7c26 100644
--- a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_crtc.c
+++ b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_crtc.c
@@ -165,7 +165,7 @@ static void unref_cursor_worker(struct drm_flip_work *work, void *val)
 		container_of(work, struct mdp5_crtc, unref_cursor_work);
 	struct mdp5_kms *mdp5_kms = get_kms(&mdp5_crtc->base);
 
-	msm_gem_put_iova(val, mdp5_kms->id);
+	msm_gem_put_iova(val, mdp5_kms->base.base.aspace);
 	drm_gem_object_unreference_unlocked(val);
 }
 
@@ -520,7 +520,8 @@ static int mdp5_crtc_cursor_set(struct drm_crtc *crtc,
 	if (!cursor_bo)
 		return -ENOENT;
 
-	ret = msm_gem_get_iova(cursor_bo, mdp5_kms->id, &cursor_addr);
+	ret = msm_gem_get_iova(cursor_bo, mdp5_kms->base.base.aspace,
+		&cursor_addr);
 	if (ret)
 		return -EINVAL;
 
diff --git a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c
index 1142a9c..93beb11 100644
--- a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c
+++ b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c
@@ -151,7 +151,7 @@ static int mdp5_set_split_display(struct msm_kms *kms,
 static void mdp5_kms_destroy(struct msm_kms *kms)
 {
 	struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
-	struct msm_gem_address_space *aspace = mdp5_kms->aspace;
+	struct msm_gem_address_space *aspace = kms->aspace;
 	int i;
 
 	for (i = 0; i < mdp5_kms->num_hwpipes; i++)
@@ -707,7 +707,7 @@ struct msm_kms *mdp5_kms_init(struct drm_device *dev)
 			goto fail;
 		}
 
-		mdp5_kms->aspace = aspace;
+		kms->aspace = aspace;
 
 		ret = aspace->mmu->funcs->attach(aspace->mmu, iommu_ports,
 				ARRAY_SIZE(iommu_ports));
@@ -722,13 +722,6 @@ struct msm_kms *mdp5_kms_init(struct drm_device *dev)
 		aspace = NULL;;
 	}
 
-	mdp5_kms->id = msm_register_address_space(dev, aspace);
-	if (mdp5_kms->id < 0) {
-		ret = mdp5_kms->id;
-		dev_err(&pdev->dev, "failed to register mdp5 iommu: %d\n", ret);
-		goto fail;
-	}
-
 	ret = modeset_init(mdp5_kms);
 	if (ret) {
 		dev_err(&pdev->dev, "modeset_init failed: %d\n", ret);
diff --git a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.h b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.h
index 2e5a768..1020c38 100644
--- a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.h
+++ b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.h
@@ -48,10 +48,6 @@ struct mdp5_kms {
 	struct mdp5_state *state;
 	struct drm_modeset_lock state_lock;
 
-	/* mapper-id used to request GEM buffer mapped for scanout: */
-	int id;
-	struct msm_gem_address_space *aspace;
-
 	struct mdp5_smp *smp;
 	struct mdp5_ctl_manager *ctlm;
 
diff --git a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c
index 19fc997..2d52d4f 100644
--- a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c
+++ b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c
@@ -259,7 +259,7 @@ static int mdp5_plane_prepare_fb(struct drm_plane *plane,
 		return 0;
 
 	DBG("%s: prepare: FB[%u]", plane->name, fb->base.id);
-	return msm_framebuffer_prepare(fb, mdp5_kms->id);
+	return msm_framebuffer_prepare(fb, mdp5_kms->base.base.aspace);
 }
 
 static void mdp5_plane_cleanup_fb(struct drm_plane *plane,
@@ -272,7 +272,7 @@ static void mdp5_plane_cleanup_fb(struct drm_plane *plane,
 		return;
 
 	DBG("%s: cleanup: FB[%u]", plane->name, fb->base.id);
-	msm_framebuffer_cleanup(fb, mdp5_kms->id);
+	msm_framebuffer_cleanup(fb, mdp5_kms->base.base.aspace);
 }
 
 static int mdp5_plane_atomic_check(struct drm_plane *plane,
@@ -391,6 +391,7 @@ static void set_scanout_locked(struct drm_plane *plane,
 		struct drm_framebuffer *fb)
 {
 	struct mdp5_kms *mdp5_kms = get_kms(plane);
+	struct msm_kms *kms = &mdp5_kms->base.base;
 	struct mdp5_hw_pipe *hwpipe = to_mdp5_plane_state(plane->state)->hwpipe;
 	enum mdp5_pipe pipe = hwpipe->pipe;
 
@@ -403,13 +404,13 @@ static void set_scanout_locked(struct drm_plane *plane,
 			MDP5_PIPE_SRC_STRIDE_B_P3(fb->pitches[3]));
 
 	mdp5_write(mdp5_kms, REG_MDP5_PIPE_SRC0_ADDR(pipe),
-			msm_framebuffer_iova(fb, mdp5_kms->id, 0));
+			msm_framebuffer_iova(fb, kms->aspace, 0));
 	mdp5_write(mdp5_kms, REG_MDP5_PIPE_SRC1_ADDR(pipe),
-			msm_framebuffer_iova(fb, mdp5_kms->id, 1));
+			msm_framebuffer_iova(fb, kms->aspace, 1));
 	mdp5_write(mdp5_kms, REG_MDP5_PIPE_SRC2_ADDR(pipe),
-			msm_framebuffer_iova(fb, mdp5_kms->id, 2));
+			msm_framebuffer_iova(fb, kms->aspace, 2));
 	mdp5_write(mdp5_kms, REG_MDP5_PIPE_SRC3_ADDR(pipe),
-			msm_framebuffer_iova(fb, mdp5_kms->id, 3));
+			msm_framebuffer_iova(fb, kms->aspace, 3));
 
 	plane->fb = fb;
 }
diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index 1e4e022..1dbcd61 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -51,20 +51,6 @@ static void msm_fb_output_poll_changed(struct drm_device *dev)
 	.atomic_state_free = msm_atomic_state_free,
 };
 
-int msm_register_address_space(struct drm_device *dev,
-		struct msm_gem_address_space *aspace)
-{
-	struct msm_drm_private *priv = dev->dev_private;
-	int idx = priv->num_aspaces++;
-
-	if (WARN_ON(idx >= ARRAY_SIZE(priv->aspace)))
-		return -EINVAL;
-
-	priv->aspace[idx] = aspace;
-
-	return idx;
-}
-
 #ifdef CONFIG_DRM_MSM_REGISTER_LOGGING
 static bool reglog = false;
 MODULE_PARM_DESC(reglog, "Enable register read/write logging");
diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
index ed4dad3..0c1a49e 100644
--- a/drivers/gpu/drm/msm/msm_drv.h
+++ b/drivers/gpu/drm/msm/msm_drv.h
@@ -183,9 +183,6 @@ int msm_atomic_commit(struct drm_device *dev,
 void msm_atomic_state_clear(struct drm_atomic_state *state);
 void msm_atomic_state_free(struct drm_atomic_state *state);
 
-int msm_register_address_space(struct drm_device *dev,
-		struct msm_gem_address_space *aspace);
-
 void msm_gem_unmap_vma(struct msm_gem_address_space *aspace,
 		struct msm_gem_vma *vma, struct sg_table *sgt);
 int msm_gem_map_vma(struct msm_gem_address_space *aspace,
@@ -208,13 +205,16 @@ int msm_gem_mmap_obj(struct drm_gem_object *obj,
 int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
 int msm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf);
 uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj);
-int msm_gem_get_iova_locked(struct drm_gem_object *obj, int id,
-		uint64_t *iova);
-int msm_gem_get_iova(struct drm_gem_object *obj, int id, uint64_t *iova);
-uint64_t msm_gem_iova(struct drm_gem_object *obj, int id);
+int msm_gem_get_iova_locked(struct drm_gem_object *obj,
+		struct msm_gem_address_space *aspace, uint64_t *iova);
+int msm_gem_get_iova(struct drm_gem_object *obj,
+		struct msm_gem_address_space *aspace, uint64_t *iova);
+uint64_t msm_gem_iova(struct drm_gem_object *obj,
+		struct msm_gem_address_space *aspace);
 struct page **msm_gem_get_pages(struct drm_gem_object *obj);
 void msm_gem_put_pages(struct drm_gem_object *obj);
-void msm_gem_put_iova(struct drm_gem_object *obj, int id);
+void msm_gem_put_iova(struct drm_gem_object *obj,
+		struct msm_gem_address_space *aspace);
 int msm_gem_dumb_create(struct drm_file *file, struct drm_device *dev,
 		struct drm_mode_create_dumb *args);
 int msm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev,
@@ -249,9 +249,12 @@ struct drm_gem_object *msm_gem_new(struct drm_device *dev,
 struct drm_gem_object *msm_gem_import(struct drm_device *dev,
 		struct dma_buf *dmabuf, struct sg_table *sgt);
 
-int msm_framebuffer_prepare(struct drm_framebuffer *fb, int id);
-void msm_framebuffer_cleanup(struct drm_framebuffer *fb, int id);
-uint32_t msm_framebuffer_iova(struct drm_framebuffer *fb, int id, int plane);
+int msm_framebuffer_prepare(struct drm_framebuffer *fb,
+		struct msm_gem_address_space *aspace);
+void msm_framebuffer_cleanup(struct drm_framebuffer *fb,
+		struct msm_gem_address_space *aspace);
+uint32_t msm_framebuffer_iova(struct drm_framebuffer *fb,
+		struct msm_gem_address_space *aspace, int plane);
 struct drm_gem_object *msm_framebuffer_bo(struct drm_framebuffer *fb, int plane);
 const struct msm_format *msm_framebuffer_format(struct drm_framebuffer *fb);
 struct drm_framebuffer *msm_framebuffer_init(struct drm_device *dev,
diff --git a/drivers/gpu/drm/msm/msm_fb.c b/drivers/gpu/drm/msm/msm_fb.c
index 9acf544..cedadbf 100644
--- a/drivers/gpu/drm/msm/msm_fb.c
+++ b/drivers/gpu/drm/msm/msm_fb.c
@@ -84,14 +84,15 @@ void msm_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)
  * should be fine, since only the scanout (mdpN) side of things needs
  * this, the gpu doesn't care about fb's.
  */
-int msm_framebuffer_prepare(struct drm_framebuffer *fb, int id)
+int msm_framebuffer_prepare(struct drm_framebuffer *fb,
+		struct msm_gem_address_space *aspace)
 {
 	struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
 	int ret, i, n = drm_format_num_planes(fb->pixel_format);
 	uint64_t iova;
 
 	for (i = 0; i < n; i++) {
-		ret = msm_gem_get_iova(msm_fb->planes[i], id, &iova);
+		ret = msm_gem_get_iova(msm_fb->planes[i], aspace, &iova);
 		DBG("FB[%u]: iova[%d]: %08llx (%d)", fb->base.id, i, iova, ret);
 		if (ret)
 			return ret;
@@ -100,21 +101,23 @@ int msm_framebuffer_prepare(struct drm_framebuffer *fb, int id)
 	return 0;
 }
 
-void msm_framebuffer_cleanup(struct drm_framebuffer *fb, int id)
+void msm_framebuffer_cleanup(struct drm_framebuffer *fb,
+		struct msm_gem_address_space *aspace)
 {
 	struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
 	int i, n = drm_format_num_planes(fb->pixel_format);
 
 	for (i = 0; i < n; i++)
-		msm_gem_put_iova(msm_fb->planes[i], id);
+		msm_gem_put_iova(msm_fb->planes[i], aspace);
 }
 
-uint32_t msm_framebuffer_iova(struct drm_framebuffer *fb, int id, int plane)
+uint32_t msm_framebuffer_iova(struct drm_framebuffer *fb,
+		struct msm_gem_address_space *aspace, int plane)
 {
 	struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
 	if (!msm_fb->planes[plane])
 		return 0;
-	return msm_gem_iova(msm_fb->planes[plane], id) + fb->offsets[plane];
+	return msm_gem_iova(msm_fb->planes[plane], aspace) + fb->offsets[plane];
 }
 
 struct drm_gem_object *msm_framebuffer_bo(struct drm_framebuffer *fb, int plane)
diff --git a/drivers/gpu/drm/msm/msm_fbdev.c b/drivers/gpu/drm/msm/msm_fbdev.c
index e8f41eb..0b5b839 100644
--- a/drivers/gpu/drm/msm/msm_fbdev.c
+++ b/drivers/gpu/drm/msm/msm_fbdev.c
@@ -20,6 +20,7 @@
 #include "drm_crtc.h"
 #include "drm_fb_helper.h"
 #include "msm_gem.h"
+#include "msm_kms.h"
 
 extern int msm_gem_mmap_obj(struct drm_gem_object *obj,
 					struct vm_area_struct *vma);
@@ -78,6 +79,7 @@ static int msm_fbdev_create(struct drm_fb_helper *helper,
 {
 	struct msm_fbdev *fbdev = to_msm_fbdev(helper);
 	struct drm_device *dev = helper->dev;
+	struct msm_drm_private *priv = dev->dev_private;
 	struct drm_framebuffer *fb = NULL;
 	struct fb_info *fbi = NULL;
 	struct drm_mode_fb_cmd2 mode_cmd = {0};
@@ -129,7 +131,13 @@ static int msm_fbdev_create(struct drm_fb_helper *helper,
 	 * in panic (ie. lock-safe, etc) we could avoid pinning the
 	 * buffer now:
 	 */
-	ret = msm_gem_get_iova_locked(fbdev->bo, 0, &paddr);
+
+	if (!priv->kms) {
+		ret = -ENODEV;
+		goto fail_unlock;
+	}
+
+	ret = msm_gem_get_iova_locked(fbdev->bo, priv->kms->aspace, &paddr);
 	if (ret) {
 		dev_err(dev->dev, "failed to get buffer obj iova: %d\n", ret);
 		goto fail_unlock;
diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c
index cd06cfd..a428377 100644
--- a/drivers/gpu/drm/msm/msm_gem.c
+++ b/drivers/gpu/drm/msm/msm_gem.c
@@ -289,18 +289,49 @@ uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj)
 put_iova(struct drm_gem_object *obj)
 {
 	struct drm_device *dev = obj->dev;
-	struct msm_drm_private *priv = obj->dev->dev_private;
 	struct msm_gem_object *msm_obj = to_msm_bo(obj);
-	int id;
+	struct msm_gem_vma *domain, *tmp;
 
 	WARN_ON(!mutex_is_locked(&dev->struct_mutex));
 
-	for (id = 0; id < ARRAY_SIZE(msm_obj->domain); id++) {
-		msm_gem_unmap_vma(priv->aspace[id],
-				&msm_obj->domain[id], msm_obj->sgt);
+	list_for_each_entry_safe(domain, tmp, &msm_obj->domains, list) {
+		if (iommu_present(&platform_bus_type))
+			msm_gem_unmap_vma(domain->aspace, domain, msm_obj->sgt);
+		list_del(&domain->list);
+		kfree(domain);
 	}
 }
 
+static struct msm_gem_vma *obj_add_domain(struct drm_gem_object *obj,
+		struct msm_gem_address_space *aspace)
+{
+	struct msm_gem_object *msm_obj = to_msm_bo(obj);
+	struct msm_gem_vma *domain = kzalloc(sizeof(*domain), GFP_KERNEL);
+
+	if (!domain)
+		return ERR_PTR(-ENOMEM);
+
+	domain->aspace = aspace;
+
+	list_add_tail(&domain->list, &msm_obj->domains);
+
+	return domain;
+}
+
+static struct msm_gem_vma *obj_get_domain(struct drm_gem_object *obj,
+		struct msm_gem_address_space *aspace)
+{
+	struct msm_gem_object *msm_obj = to_msm_bo(obj);
+	struct msm_gem_vma *domain;
+
+	list_for_each_entry(domain, &msm_obj->domains, list) {
+		if (domain->aspace == aspace)
+			return domain;
+	}
+
+	return NULL;
+}
+
 /* should be called under struct_mutex.. although it can be called
  * from atomic context without struct_mutex to acquire an extra
  * iova ref if you know one is already held.
@@ -308,49 +339,60 @@ uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj)
  * That means when I do eventually need to add support for unpinning
  * the refcnt counter needs to be atomic_t.
  */
-int msm_gem_get_iova_locked(struct drm_gem_object *obj, int id,
-		uint64_t *iova)
+int msm_gem_get_iova_locked(struct drm_gem_object *obj,
+		struct msm_gem_address_space *aspace, uint64_t *iova)
 {
 	struct msm_gem_object *msm_obj = to_msm_bo(obj);
+	struct page **pages;
+	struct msm_gem_vma *domain;
 	int ret = 0;
 
-	if (!msm_obj->domain[id].iova) {
-		struct msm_drm_private *priv = obj->dev->dev_private;
-		struct page **pages = get_pages(obj);
+	if (!iommu_present(&platform_bus_type)) {
+		pages = get_pages(obj);
 
 		if (IS_ERR(pages))
 			return PTR_ERR(pages);
 
-		if (iommu_present(&platform_bus_type)) {
-			ret = msm_gem_map_vma(priv->aspace[id], &msm_obj->domain[id],
-					msm_obj->sgt, obj->size >> PAGE_SHIFT);
-		} else {
-			msm_obj->domain[id].iova = physaddr(obj);
-		}
+		*iova = physaddr(obj);
+		return 0;
+	}
+
+	domain = obj_get_domain(obj, aspace);
+
+	if (!domain) {
+		domain = obj_add_domain(obj, aspace);
+		if (IS_ERR(domain))
+			return  PTR_ERR(domain);
+
+		pages = get_pages(obj);
+		if (IS_ERR(pages))
+			return PTR_ERR(pages);
+
+		ret = msm_gem_map_vma(aspace, domain, msm_obj->sgt,
+			obj->size >> PAGE_SHIFT);
 	}
 
 	if (!ret)
-		*iova = msm_obj->domain[id].iova;
+		*iova = domain->iova;
 
 	return ret;
 }
 
 /* get iova, taking a reference.  Should have a matching put */
-int msm_gem_get_iova(struct drm_gem_object *obj, int id, uint64_t *iova)
+int msm_gem_get_iova(struct drm_gem_object *obj,
+		struct msm_gem_address_space *aspace, uint64_t *iova)
 {
-	struct msm_gem_object *msm_obj = to_msm_bo(obj);
+	struct msm_gem_vma *domain;
 	int ret;
 
-	/* this is safe right now because we don't unmap until the
-	 * bo is deleted:
-	 */
-	if (msm_obj->domain[id].iova) {
-		*iova = msm_obj->domain[id].iova;
+	domain = obj_get_domain(obj, aspace);
+	if (domain) {
+		*iova = domain->iova;
 		return 0;
 	}
 
 	mutex_lock(&obj->dev->struct_mutex);
-	ret = msm_gem_get_iova_locked(obj, id, iova);
+	ret = msm_gem_get_iova_locked(obj, aspace, iova);
 	mutex_unlock(&obj->dev->struct_mutex);
 	return ret;
 }
@@ -358,14 +400,18 @@ int msm_gem_get_iova(struct drm_gem_object *obj, int id, uint64_t *iova)
 /* get iova without taking a reference, used in places where you have
  * already done a 'msm_gem_get_iova()'.
  */
-uint64_t msm_gem_iova(struct drm_gem_object *obj, int id)
+uint64_t msm_gem_iova(struct drm_gem_object *obj,
+		struct msm_gem_address_space *aspace)
 {
-	struct msm_gem_object *msm_obj = to_msm_bo(obj);
-	WARN_ON(!msm_obj->domain[id].iova);
-	return msm_obj->domain[id].iova;
+	struct msm_gem_vma *domain = obj_get_domain(obj, aspace);
+
+	WARN_ON(!domain);
+
+	return domain ? domain->iova : 0;
 }
 
-void msm_gem_put_iova(struct drm_gem_object *obj, int id)
+void msm_gem_put_iova(struct drm_gem_object *obj,
+		struct msm_gem_address_space *aspace)
 {
 	// XXX TODO ..
 	// NOTE: probably don't need a _locked() version.. we wouldn't
@@ -619,11 +665,10 @@ void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m)
 	struct msm_gem_object *msm_obj = to_msm_bo(obj);
 	struct reservation_object *robj = msm_obj->resv;
 	struct reservation_object_list *fobj;
-	struct msm_drm_private *priv = obj->dev->dev_private;
 	struct dma_fence *fence;
 	uint64_t off = drm_vma_node_start(&obj->vma_node);
 	const char *madv;
-	unsigned id;
+	struct msm_gem_vma *domain;
 
 	WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex));
 
@@ -645,8 +690,9 @@ void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m)
 			obj->name, obj->refcount.refcount.counter,
 			off, msm_obj->vaddr);
 
-	for (id = 0; id < priv->num_aspaces; id++)
-		seq_printf(m, " %08llx", msm_obj->domain[id].iova);
+	/* FIXME: we need to print the address space here too */
+	list_for_each_entry(domain, &msm_obj->domains, list)
+		seq_printf(m, " %08llx", domain->iova);
 
 	seq_printf(m, " %zu%s\n", obj->size, madv);
 
@@ -781,8 +827,12 @@ static int msm_gem_new_impl(struct drm_device *dev,
 	if (!msm_obj)
 		return -ENOMEM;
 
-	if (use_vram)
-		msm_obj->vram_node = &msm_obj->domain[0].node;
+	if (use_vram) {
+		struct msm_gem_vma *domain = obj_add_domain(&msm_obj->base, 0);
+		/* FIXME: Error here? */
+		if (domain)
+			msm_obj->vram_node = &domain->node;
+	}
 
 	msm_obj->flags = flags;
 	msm_obj->madv = MSM_MADV_WILLNEED;
@@ -795,6 +845,8 @@ static int msm_gem_new_impl(struct drm_device *dev,
 	}
 
 	INIT_LIST_HEAD(&msm_obj->submit_entry);
+	INIT_LIST_HEAD(&msm_obj->domains);
+
 	list_add_tail(&msm_obj->mm_list, &priv->inactive_list);
 
 	*obj = &msm_obj->base;
diff --git a/drivers/gpu/drm/msm/msm_gem.h b/drivers/gpu/drm/msm/msm_gem.h
index 7d52951..40cd0b6 100644
--- a/drivers/gpu/drm/msm/msm_gem.h
+++ b/drivers/gpu/drm/msm/msm_gem.h
@@ -35,7 +35,9 @@ struct msm_gem_address_space {
 
 struct msm_gem_vma {
 	struct drm_mm_node node;
+	struct msm_gem_address_space *aspace;
 	uint64_t iova;
+	struct list_head list;
 };
 
 struct msm_gem_object {
@@ -75,7 +77,7 @@ struct msm_gem_object {
 	struct sg_table *sgt;
 	void *vaddr;
 
-	struct msm_gem_vma domain[NUM_DOMAINS];
+	struct list_head domains;
 
 	/* normally (resv == &_resv) except for imported bo's */
 	struct reservation_object *resv;
diff --git a/drivers/gpu/drm/msm/msm_gem_submit.c b/drivers/gpu/drm/msm/msm_gem_submit.c
index 4896765..6fd7446 100644
--- a/drivers/gpu/drm/msm/msm_gem_submit.c
+++ b/drivers/gpu/drm/msm/msm_gem_submit.c
@@ -158,7 +158,7 @@ static void submit_unlock_unpin_bo(struct msm_gem_submit *submit, int i)
 	struct msm_gem_object *msm_obj = submit->bos[i].obj;
 
 	if (submit->bos[i].flags & BO_PINNED)
-		msm_gem_put_iova(&msm_obj->base, submit->gpu->id);
+		msm_gem_put_iova(&msm_obj->base, submit->gpu->aspace);
 
 	if (submit->bos[i].flags & BO_LOCKED)
 		ww_mutex_unlock(&msm_obj->resv->lock);
@@ -246,7 +246,7 @@ static int submit_pin_objects(struct msm_gem_submit *submit)
 
 		/* if locking succeeded, pin bo: */
 		ret = msm_gem_get_iova_locked(&msm_obj->base,
-				submit->gpu->id, &iova);
+				submit->gpu->aspace, &iova);
 
 		if (ret)
 			break;
diff --git a/drivers/gpu/drm/msm/msm_gpu.c b/drivers/gpu/drm/msm/msm_gpu.c
index 403cca1..d336c24 100644
--- a/drivers/gpu/drm/msm/msm_gpu.c
+++ b/drivers/gpu/drm/msm/msm_gpu.c
@@ -458,7 +458,7 @@ static void retire_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit)
 		struct msm_gem_object *msm_obj = submit->bos[i].obj;
 		/* move to inactive: */
 		msm_gem_move_to_inactive(&msm_obj->base);
-		msm_gem_put_iova(&msm_obj->base, gpu->id);
+		msm_gem_put_iova(&msm_obj->base, gpu->aspace);
 		drm_gem_object_unreference(&msm_obj->base);
 	}
 
@@ -539,7 +539,7 @@ void msm_gpu_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit,
 		/* submit takes a reference to the bo and iova until retired: */
 		drm_gem_object_reference(&msm_obj->base);
 		msm_gem_get_iova_locked(&msm_obj->base,
-				submit->gpu->id, &iova);
+				submit->gpu->aspace, &iova);
 
 		if (submit->bos[i].flags & MSM_SUBMIT_BO_WRITE)
 			msm_gem_move_to_active(&msm_obj->base, gpu, true, submit->fence);
@@ -675,8 +675,6 @@ int msm_gpu_init(struct drm_device *drm, struct platform_device *pdev,
 	} else {
 		dev_info(drm->dev, "%s: no IOMMU, fallback to VRAM carveout!\n", name);
 	}
-	gpu->id = msm_register_address_space(drm, gpu->aspace);
-
 
 	/* Create ringbuffer: */
 	mutex_lock(&drm->struct_mutex);
@@ -707,7 +705,7 @@ void msm_gpu_cleanup(struct msm_gpu *gpu)
 
 	if (gpu->rb) {
 		if (gpu->rb_iova)
-			msm_gem_put_iova(gpu->rb->bo, gpu->id);
+			msm_gem_put_iova(gpu->rb->bo, gpu->aspace);
 		msm_ringbuffer_destroy(gpu->rb);
 	}
 
diff --git a/drivers/gpu/drm/msm/msm_gpu.h b/drivers/gpu/drm/msm/msm_gpu.h
index 267723f..ad6d13a 100644
--- a/drivers/gpu/drm/msm/msm_gpu.h
+++ b/drivers/gpu/drm/msm/msm_gpu.h
@@ -98,7 +98,6 @@ struct msm_gpu {
 	int irq;
 
 	struct msm_gem_address_space *aspace;
-	int id;
 
 	/* Power Control: */
 	struct regulator *gpu_reg, *gpu_cx;
diff --git a/drivers/gpu/drm/msm/msm_kms.h b/drivers/gpu/drm/msm/msm_kms.h
index e470f4c..722a250 100644
--- a/drivers/gpu/drm/msm/msm_kms.h
+++ b/drivers/gpu/drm/msm/msm_kms.h
@@ -70,6 +70,9 @@ struct msm_kms {
 
 	/* irq number to be passed on to drm_irq_install */
 	int irq;
+
+	/* mapper-id used to request GEM buffer mapped for scanout: */
+	struct msm_gem_address_space *aspace;
 };
 
 /**
-- 
1.9.1