From baa7a08569358d9d16e71ce36f287c39a665d776 Mon Sep 17 00:00:00 2001
From: Bhaumik Bhatt <bbhatt@codeaurora.org>
Date: Mon, 2 Aug 2021 10:42:50 +0530
Subject: [PATCH] bus: mhi: Add MMIO region length to controller structure
Git-commit: baa7a08569358d9d16e71ce36f287c39a665d776
Patch-mainline: v5.15-rc1
References: bsc#1206451

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.

Link: https://lore.kernel.org/r/1620330705-40192-4-git-send-email-bbhatt@codeaurora.org
Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Reviewed-by: Hemant Kumar <hemantk@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20210802051255.5771-6-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 include/linux/mhi.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/linux/mhi.h b/include/linux/mhi.h
index 5e08468854db..b8ca6943f0b7 100644
--- a/include/linux/mhi.h
+++ b/include/linux/mhi.h
@@ -303,6 +303,7 @@ struct mhi_controller_config {
  * @rddm_size: RAM dump size that host should allocate for debugging purpose
  * @sbl_size: SBL image size downloaded through BHIe (optional)
  * @seg_len: BHIe vector size (optional)
+ * @reg_len: Length of the MHI MMIO region (required)
  * @fbc_image: Points to firmware image buffer
  * @rddm_image: Points to RAM dump buffer
  * @mhi_chan: Points to the channel configuration table
@@ -386,6 +387,7 @@ struct mhi_controller {
 	size_t rddm_size;
 	size_t sbl_size;
 	size_t seg_len;
+	size_t reg_len;
 	struct image_info *fbc_image;
 	struct image_info *rddm_image;
 	struct mhi_chan *mhi_chan;
-- 
2.35.3