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From: Bhaumik Bhatt <>
	Bhaumik Bhatt <>
Subject: [PATCH v1 3/6] bus: mhi: Add MMIO region length to controller structure
Date: Fri, 16 Apr 2021 11:47:02 -0700	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

Make controller driver specify the MMIO register region length
for range checking of BHI or BHIe space. This can help validate
that offsets are in acceptable memory region or not and avoid any
boot-up issues due to BHI or BHIe memory accesses.

Signed-off-by: Bhaumik Bhatt <>
 include/linux/mhi.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/linux/mhi.h b/include/linux/mhi.h
index 944aa3a..ad53b24 100644
--- a/include/linux/mhi.h
+++ b/include/linux/mhi.h
@@ -293,6 +293,7 @@ struct mhi_controller_config {
  * @mhi_dev: MHI device instance for the controller
  * @debugfs_dentry: MHI controller debugfs directory
  * @regs: Base address of MHI MMIO register space (required)
+ * @reg_len: Length of the MHI MMIO region (required)
  * @bhi: Points to base of MHI BHI register space
  * @bhie: Points to base of MHI BHIe register space
  * @wake_db: MHI WAKE doorbell register address
@@ -375,6 +376,7 @@ struct mhi_controller {
 	struct mhi_device *mhi_dev;
 	struct dentry *debugfs_dentry;
 	void __iomem *regs;
+	size_t reg_len;
 	void __iomem *bhi;
 	void __iomem *bhie;
 	void __iomem *wake_db;
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project

  parent reply	other threads:[~2021-04-16 18:47 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-16 18:46 [PATCH v1 0/6] BHI/BHIe improvements for MHI power purposes Bhaumik Bhatt
2021-04-16 18:47 ` [PATCH v1 1/6] bus: mhi: core: Set BHI/BHIe offsets on power up preparation Bhaumik Bhatt
2021-05-04 17:22   ` Jeffrey Hugo
2021-04-16 18:47 ` [PATCH v1 2/6] bus: mhi: core: Set BHI and BHIe pointers to NULL in clean-up Bhaumik Bhatt
2021-05-04 17:26   ` Jeffrey Hugo
2021-04-16 18:47 ` Bhaumik Bhatt [this message]
2021-05-04 17:28   ` [PATCH v1 3/6] bus: mhi: Add MMIO region length to controller structure Jeffrey Hugo
2021-05-04 23:04     ` Bhaumik Bhatt
2021-04-16 18:47 ` [PATCH v1 4/6] ath11k: set register access length for MHI driver Bhaumik Bhatt
2021-04-16 18:47 ` [PATCH v1 5/6] bus: mhi: pci_generic: Set " Bhaumik Bhatt
2021-04-16 18:47 ` [PATCH v1 6/6] bus: mhi: core: Add range checks for BHI and BHIe Bhaumik Bhatt
2021-05-04 17:30   ` Jeffrey Hugo

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