meta-hailo: Fix the CMA issue when PVU was integrated

PVU-based DMA isolation brings SWIO TLB to the table and
the maximum allowable number of contiguous slabs to map
is 128 by default, but meta-hailo requires more 128. Hence
increase it to 256 when meta-hailo is included.

Signed-off-by: Li Hua Qian <[email protected]>

kas/opt/meta-hailo.yml

@@ -11,6 +11,10 @@
 header:
   version: 14
 
+local_conf_header:
+  hailo_override: |
+    OVERRIDES .= ":meta-hailo"
+
 repos:
   meta-hailo:
     path: ${TOPDIR}/../meta-hailo

recipes-kernel/linux/files/patches-6.1/0100-swiotlb-Make-IO_TLB_SEGSIZE-configurable.patch

@@ -0,0 +1,50 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Li Hua Qian <[email protected]>
+Date: Tue, 3 Dec 2024 14:49:59 +0800
+Subject: [PATCH] swiotlb: Make IO_TLB_SEGSIZE configurable
+
+In some applications, the default value of 128 is not sufficient for
+memory allocation and can cause runtime errors. This change makes
+IO_TLB_SEGSIZE configurable, allowing it to be increased if needed.
+
+Signed-off-by: Li Hua Qian <[email protected]>
+---
+ include/linux/swiotlb.h | 6 +++++-
+ kernel/dma/Kconfig      | 7 +++++++
+ 2 files changed, 12 insertions(+), 1 deletion(-)
+
+diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h
+index 1a1b284ec298..bf1e1f5cd67b 100644
+--- a/include/linux/swiotlb.h
++++ b/include/linux/swiotlb.h
+@@ -22,7 +22,11 @@ struct scatterlist;
+  * must be a power of 2.  What is the appropriate value ?
+  * The complexity of {map,unmap}_single is linearly dependent on this value.
+  */
+-#define IO_TLB_SEGSIZE	256
++#ifdef CONFIG_SWIOTLB_SEGSIZE
++#define IO_TLB_SEGSIZE CONFIG_SWIOTLB_SEGSIZE
++#else
++#define IO_TLB_SEGSIZE 128
++#endif
+
+ /*
+  * log of the size of each IO TLB slab.  The number of slabs is command line
+diff --git a/kernel/dma/Kconfig b/kernel/dma/Kconfig
+index 56866aaa2ae1..2eebe8836100 100644
+--- a/kernel/dma/Kconfig
++++ b/kernel/dma/Kconfig
+@@ -80,6 +80,13 @@ config SWIOTLB
+ 	bool
+ 	select NEED_DMA_MAP_STATE
+
++config SWIOTLB_SEGSIZE
++    int "SWIOTLB segment size"
++    default 128
++    help
++      Set the maximum allowable number of contiguous slabs to map.
++      Must be a power of 2.
++
+ config DMA_RESTRICTED_POOL
+ 	bool "DMA Restricted Pool"
+ 	depends on OF && OF_RESERVED_MEM && SWIOTLB

recipes-kernel/linux/linux-iot2050-6.1.inc

@@ -26,6 +26,8 @@ def get_extra_configs(d):
 
     if re.search("pvu-dma", overrides):
         append_config.append('CONFIG_TI_PVU=y')
+        if re.search("meta-hailo", overrides):
+            append_config.append('CONFIG_SWIOTLB_SEGSIZE=256')
 
     if append_config:
         append_config_file = os.path.join(d.getVar('T'), 'iot2050_append_config.cfg')