The Broadcom stream buffer accelerator (SBA) provides offloading
capabilities for RAID operations. This SBA offload engine is
accessible via Broadcom SoC specific ring manager.

This patch adds Broadcom SBA RAID driver which provides one
DMA device with RAID capabilities using one or more Broadcom
SoC specific ring manager channels. The SBA RAID driver in its
current shape implements memcpy, xor, and pq operations.

Signed-off-by: Anup Patel <redacted>
Reviewed-by: Ray Jui <redacted>
---
 drivers/dma/Kconfig        |   13 +
 drivers/dma/Makefile       |    1 +
 drivers/dma/bcm-sba-raid.c | 1694 ++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 1708 insertions(+)
 create mode 100644 drivers/dma/bcm-sba-raid.c

diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index 263495d..bf8fb84 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig

@@ -99,6 +99,19 @@ config AXI_DMAC
          controller is often used in Analog Device's reference designs for FPGA
          platforms.

+config BCM_SBA_RAID
+       tristate "Broadcom SBA RAID engine support"
+       depends on (ARM64 && MAILBOX && RAID6_PQ) || COMPILE_TEST
+       select DMA_ENGINE
+       select DMA_ENGINE_RAID
+       select ASYNC_TX_ENABLE_CHANNEL_SWITCH