Merge tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC driver updates from Arnd Bergmann:
 "A number of new drivers get added this time, along with many
  low-priority bugfixes. The most interesting changes by subsystem are:

  bus drivers:
   - Updates to the Broadcom bus interface driver to support newer SoC
     types
   - The TI OMAP sysc driver now supports updated DT bindings

  memory controllers:
   - A new driver for Tegra186 gets added
   - A new driver for the ti-emif sram, to allow relocating
     suspend/resume handlers there

  SoC specific:
   - A new driver for Qualcomm QMI, the interface to the modem on MSM
     SoCs
   - A new driver for power domains on the actions S700 SoC
   - A driver for the Xilinx Zynq VCU logicoreIP

  reset controllers:
   - A new driver for Amlogic Meson-AGX
   - various bug fixes

  tee subsystem:
   - A new user interface got added to enable asynchronous communication
     with the TEE supplicant.
   - A new method of using user space memory for communication with the
     TEE is added"

* tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (84 commits)
  of: platform: fix OF node refcount leak
  soc: fsl: guts: Add a NULL check for devm_kasprintf()
  bus: ti-sysc: Fix smartreflex sysc mask
  psci: add CPU_IDLE dependency
  soc: xilinx: Fix Kconfig alignment
  soc: xilinx: xlnx_vcu: Use bitwise & rather than logical && on clkoutdiv
  soc: xilinx: xlnx_vcu: Depends on HAS_IOMEM for xlnx_vcu
  soc: bcm: brcmstb: Be multi-platform compatible
  soc: brcmstb: biuctrl: exit without warning on non brcmstb platforms
  Revert "soc: brcmstb: Only register SoC device on STB platforms"
  bus: omap: add MODULE_LICENSE tags
  soc: brcmstb: Only register SoC device on STB platforms
  tee: shm: Potential NULL dereference calling tee_shm_register()
  soc: xilinx: xlnx_vcu: Add Xilinx ZYNQMP VCU logicoreIP init driver
  dt-bindings: soc: xilinx: Add DT bindings to xlnx_vcu driver
  soc: xilinx: Create folder structure for soc specific drivers
  of: platform: populate /firmware/ node from of_platform_default_populate_init()
  soc: samsung: Add SPDX license identifiers
  soc: qcom: smp2p: Use common error handling code in qcom_smp2p_probe()
  tee: shm: don't put_page on null shm->pages
  ...

1 files changed, 191 insertions, 39 deletions

diff --git a/drivers/tee/tee_shm.c b/drivers/tee/tee_shm.c
index 4bc7956cefc4..556960a1bab3 100644
--- a/drivers/tee/tee_shm.c
+++ b/drivers/tee/tee_shm.c
@@ -23,7 +23,6 @@
 static void tee_shm_release(struct tee_shm *shm)
 {
 	struct tee_device *teedev = shm->teedev;
-	struct tee_shm_pool_mgr *poolm;
 
 	mutex_lock(&teedev->mutex);
 	idr_remove(&teedev->idr, shm->id);
@@ -31,12 +30,32 @@ static void tee_shm_release(struct tee_shm *shm)
 		list_del(&shm->link);
 	mutex_unlock(&teedev->mutex);
 
-	if (shm->flags & TEE_SHM_DMA_BUF)
-		poolm = &teedev->pool->dma_buf_mgr;
-	else
-		poolm = &teedev->pool->private_mgr;
+	if (shm->flags & TEE_SHM_POOL) {
+		struct tee_shm_pool_mgr *poolm;
+
+		if (shm->flags & TEE_SHM_DMA_BUF)
+			poolm = teedev->pool->dma_buf_mgr;
+		else
+			poolm = teedev->pool->private_mgr;
+
+		poolm->ops->free(poolm, shm);
+	} else if (shm->flags & TEE_SHM_REGISTER) {
+		size_t n;
+		int rc = teedev->desc->ops->shm_unregister(shm->ctx, shm);
+
+		if (rc)
+			dev_err(teedev->dev.parent,
+				"unregister shm %p failed: %d", shm, rc);
+
+		for (n = 0; n < shm->num_pages; n++)
+			put_page(shm->pages[n]);
+
+		kfree(shm->pages);
+	}
+
+	if (shm->ctx)
+		teedev_ctx_put(shm->ctx);
 
-	poolm->ops->free(poolm, shm);
 	kfree(shm);
 
 	tee_device_put(teedev);
@@ -76,6 +95,10 @@ static int tee_shm_op_mmap(struct dma_buf *dmabuf, struct vm_area_struct *vma)
 	struct tee_shm *shm = dmabuf->priv;
 	size_t size = vma->vm_end - vma->vm_start;
 
+	/* Refuse sharing shared memory provided by application */
+	if (shm->flags & TEE_SHM_REGISTER)
+		return -EINVAL;
+
 	return remap_pfn_range(vma, vma->vm_start, shm->paddr >> PAGE_SHIFT,
 			       size, vma->vm_page_prot);
 }
@@ -89,26 +112,20 @@ static const struct dma_buf_ops tee_shm_dma_buf_ops = {
 	.mmap = tee_shm_op_mmap,
 };
 
-/**
- * tee_shm_alloc() - Allocate shared memory
- * @ctx:	Context that allocates the shared memory
- * @size:	Requested size of shared memory
- * @flags:	Flags setting properties for the requested shared memory.
- *
- * Memory allocated as global shared memory is automatically freed when the
- * TEE file pointer is closed. The @flags field uses the bits defined by
- * TEE_SHM_* in <linux/tee_drv.h>. TEE_SHM_MAPPED must currently always be
- * set. If TEE_SHM_DMA_BUF global shared memory will be allocated and
- * associated with a dma-buf handle, else driver private memory.
- */
-struct tee_shm *tee_shm_alloc(struct tee_context *ctx, size_t size, u32 flags)
+static struct tee_shm *__tee_shm_alloc(struct tee_context *ctx,
+				       struct tee_device *teedev,
+				       size_t size, u32 flags)
 {
-	struct tee_device *teedev = ctx->teedev;
 	struct tee_shm_pool_mgr *poolm = NULL;
 	struct tee_shm *shm;
 	void *ret;
 	int rc;
 
+	if (ctx && ctx->teedev != teedev) {
+		dev_err(teedev->dev.parent, "ctx and teedev mismatch\n");
+		return ERR_PTR(-EINVAL);
+	}
+
 	if (!(flags & TEE_SHM_MAPPED)) {
 		dev_err(teedev->dev.parent,
 			"only mapped allocations supported\n");
@@ -135,13 +152,13 @@ struct tee_shm *tee_shm_alloc(struct tee_context *ctx, size_t size, u32 flags)
 		goto err_dev_put;
 	}
 
-	shm->flags = flags;
+	shm->flags = flags | TEE_SHM_POOL;
 	shm->teedev = teedev;
 	shm->ctx = ctx;
 	if (flags & TEE_SHM_DMA_BUF)
-		poolm = &teedev->pool->dma_buf_mgr;
+		poolm = teedev->pool->dma_buf_mgr;
 	else
-		poolm = &teedev->pool->private_mgr;
+		poolm = teedev->pool->private_mgr;
 
 	rc = poolm->ops->alloc(poolm, shm, size);
 	if (rc) {
@@ -171,9 +188,13 @@ struct tee_shm *tee_shm_alloc(struct tee_context *ctx, size_t size, u32 flags)
 			goto err_rem;
 		}
 	}
-	mutex_lock(&teedev->mutex);
-	list_add_tail(&shm->link, &ctx->list_shm);
-	mutex_unlock(&teedev->mutex);
+
+	if (ctx) {
+		teedev_ctx_get(ctx);
+		mutex_lock(&teedev->mutex);
+		list_add_tail(&shm->link, &ctx->list_shm);
+		mutex_unlock(&teedev->mutex);
+	}
 
 	return shm;
 err_rem:
@@ -188,8 +209,145 @@ err_dev_put:
 	tee_device_put(teedev);
 	return ret;
 }
+
+/**
+ * tee_shm_alloc() - Allocate shared memory
+ * @ctx:	Context that allocates the shared memory
+ * @size:	Requested size of shared memory
+ * @flags:	Flags setting properties for the requested shared memory.
+ *
+ * Memory allocated as global shared memory is automatically freed when the
+ * TEE file pointer is closed. The @flags field uses the bits defined by
+ * TEE_SHM_* in <linux/tee_drv.h>. TEE_SHM_MAPPED must currently always be
+ * set. If TEE_SHM_DMA_BUF global shared memory will be allocated and
+ * associated with a dma-buf handle, else driver private memory.
+ */
+struct tee_shm *tee_shm_alloc(struct tee_context *ctx, size_t size, u32 flags)
+{
+	return __tee_shm_alloc(ctx, ctx->teedev, size, flags);
+}
 EXPORT_SYMBOL_GPL(tee_shm_alloc);
 
+struct tee_shm *tee_shm_priv_alloc(struct tee_device *teedev, size_t size)
+{
+	return __tee_shm_alloc(NULL, teedev, size, TEE_SHM_MAPPED);
+}
+EXPORT_SYMBOL_GPL(tee_shm_priv_alloc);
+
+struct tee_shm *tee_shm_register(struct tee_context *ctx, unsigned long addr,
+				 size_t length, u32 flags)
+{
+	struct tee_device *teedev = ctx->teedev;
+	const u32 req_flags = TEE_SHM_DMA_BUF | TEE_SHM_USER_MAPPED;
+	struct tee_shm *shm;
+	void *ret;
+	int rc;
+	int num_pages;
+	unsigned long start;
+
+	if (flags != req_flags)
+		return ERR_PTR(-ENOTSUPP);
+
+	if (!tee_device_get(teedev))
+		return ERR_PTR(-EINVAL);
+
+	if (!teedev->desc->ops->shm_register ||
+	    !teedev->desc->ops->shm_unregister) {
+		tee_device_put(teedev);
+		return ERR_PTR(-ENOTSUPP);
+	}
+
+	teedev_ctx_get(ctx);
+
+	shm = kzalloc(sizeof(*shm), GFP_KERNEL);
+	if (!shm) {
+		ret = ERR_PTR(-ENOMEM);
+		goto err;
+	}
+
+	shm->flags = flags | TEE_SHM_REGISTER;
+	shm->teedev = teedev;
+	shm->ctx = ctx;
+	shm->id = -1;
+	start = rounddown(addr, PAGE_SIZE);
+	shm->offset = addr - start;
+	shm->size = length;
+	num_pages = (roundup(addr + length, PAGE_SIZE) - start) / PAGE_SIZE;
+	shm->pages = kcalloc(num_pages, sizeof(*shm->pages), GFP_KERNEL);
+	if (!shm->pages) {
+		ret = ERR_PTR(-ENOMEM);
+		goto err;
+	}
+
+	rc = get_user_pages_fast(start, num_pages, 1, shm->pages);
+	if (rc > 0)
+		shm->num_pages = rc;
+	if (rc != num_pages) {
+		if (rc >= 0)
+			rc = -ENOMEM;
+		ret = ERR_PTR(rc);
+		goto err;
+	}
+
+	mutex_lock(&teedev->mutex);
+	shm->id = idr_alloc(&teedev->idr, shm, 1, 0, GFP_KERNEL);
+	mutex_unlock(&teedev->mutex);
+
+	if (shm->id < 0) {
+		ret = ERR_PTR(shm->id);
+		goto err;
+	}
+
+	rc = teedev->desc->ops->shm_register(ctx, shm, shm->pages,
+					     shm->num_pages, start);
+	if (rc) {
+		ret = ERR_PTR(rc);
+		goto err;
+	}
+
+	if (flags & TEE_SHM_DMA_BUF) {
+		DEFINE_DMA_BUF_EXPORT_INFO(exp_info);
+
+		exp_info.ops = &tee_shm_dma_buf_ops;
+		exp_info.size = shm->size;
+		exp_info.flags = O_RDWR;
+		exp_info.priv = shm;
+
+		shm->dmabuf = dma_buf_export(&exp_info);
+		if (IS_ERR(shm->dmabuf)) {
+			ret = ERR_CAST(shm->dmabuf);
+			teedev->desc->ops->shm_unregister(ctx, shm);
+			goto err;
+		}
+	}
+
+	mutex_lock(&teedev->mutex);
+	list_add_tail(&shm->link, &ctx->list_shm);
+	mutex_unlock(&teedev->mutex);
+
+	return shm;
+err:
+	if (shm) {
+		size_t n;
+
+		if (shm->id >= 0) {
+			mutex_lock(&teedev->mutex);
+			idr_remove(&teedev->idr, shm->id);
+			mutex_unlock(&teedev->mutex);
+		}
+		if (shm->pages) {
+			for (n = 0; n < shm->num_pages; n++)
+				put_page(shm->pages[n]);
+			kfree(shm->pages);
+		}
+	}
+	kfree(shm);
+	teedev_ctx_put(ctx);
+	tee_device_put(teedev);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(tee_shm_register);
+
 /**
  * tee_shm_get_fd() - Increase reference count and return file descriptor
  * @shm:	Shared memory handle
@@ -197,10 +355,9 @@ EXPORT_SYMBOL_GPL(tee_shm_alloc);
  */
 int tee_shm_get_fd(struct tee_shm *shm)
 {
-	u32 req_flags = TEE_SHM_MAPPED | TEE_SHM_DMA_BUF;
 	int fd;
 
-	if ((shm->flags & req_flags) != req_flags)
+	if (!(shm->flags & TEE_SHM_DMA_BUF))
 		return -EINVAL;
 
 	fd = dma_buf_fd(shm->dmabuf, O_CLOEXEC);
@@ -238,6 +395,8 @@ EXPORT_SYMBOL_GPL(tee_shm_free);
  */
 int tee_shm_va2pa(struct tee_shm *shm, void *va, phys_addr_t *pa)
 {
+	if (!(shm->flags & TEE_SHM_MAPPED))
+		return -EINVAL;
 	/* Check that we're in the range of the shm */
 	if ((char *)va < (char *)shm->kaddr)
 		return -EINVAL;
@@ -258,6 +417,8 @@ EXPORT_SYMBOL_GPL(tee_shm_va2pa);
  */
 int tee_shm_pa2va(struct tee_shm *shm, phys_addr_t pa, void **va)
 {
+	if (!(shm->flags & TEE_SHM_MAPPED))
+		return -EINVAL;
 	/* Check that we're in the range of the shm */
 	if (pa < shm->paddr)
 		return -EINVAL;
@@ -284,6 +445,8 @@ EXPORT_SYMBOL_GPL(tee_shm_pa2va);
  */
 void *tee_shm_get_va(struct tee_shm *shm, size_t offs)
 {
+	if (!(shm->flags & TEE_SHM_MAPPED))
+		return ERR_PTR(-EINVAL);
 	if (offs >= shm->size)
 		return ERR_PTR(-EINVAL);
 	return (char *)shm->kaddr + offs;
@@ -336,17 +499,6 @@ struct tee_shm *tee_shm_get_from_id(struct tee_context *ctx, int id)
 EXPORT_SYMBOL_GPL(tee_shm_get_from_id);
 
 /**
- * tee_shm_get_id() - Get id of a shared memory object
- * @shm:	Shared memory handle
- * @returns id
- */
-int tee_shm_get_id(struct tee_shm *shm)
-{
-	return shm->id;
-}
-EXPORT_SYMBOL_GPL(tee_shm_get_id);
-
-/**
  * tee_shm_put() - Decrease reference count on a shared memory handle
  * @shm:	Shared memory handle
  */