lede/target/linux/ipq806x/patches-5.4/999-01-Revert-ARM-dma-mapping-remove-dmac_clean_range-and-d.patch

145 lines
4.9 KiB
Diff

From 733a75729c1fbb478caaed875dd9c09a878a553d Mon Sep 17 00:00:00 2001
From: Robert Marko <robimarko@gmail.com>
Date: Fri, 5 Jun 2020 11:44:27 +0200
Subject: [PATCH] Revert "ARM: dma-mapping: remove dmac_clean_range and
dmac_inv_range"
This partially reverts 'commit 702b94bff3c505 ("ARM: dma-mapping:
remove dmac_clean_range and dmac_inv_range")'
Some MSM drivers still use the dmac_clean and dmac_inv_range APIs.
Bring back the defines and exports for v7 CPUs.
Signed-off-by: Rohit Vaswani <rvaswani@codeaurora.org>
Signed-off-by: Abhimanyu Kapur <abhimany@codeaurora.org>
[sramana: resolved minor merge conflicts]
Signed-off-by: Srinivas Ramana <sramana@codeaurora.org>
(cherry picked from commit d6118c0a9f7ab2b131ca36dd3dbd5634603d14fe)
Change-Id: Ib2ddb4452711c5c2013bf29f0b5d8a3572b10357
Signed-off-by: Manoharan Vijaya Raghavan <mraghava@codeaurora.org>
Signed-off-by: Robert Marko <robimarko@gmail.com>
---
arch/arm/include/asm/cacheflush.h | 21 +++++++++++++++++++++
arch/arm/include/asm/glue-cache.h | 2 ++
arch/arm/mm/cache-v7.S | 6 ++++--
arch/arm/mm/proc-macros.S | 2 ++
arch/arm/mm/proc-syms.c | 3 +++
5 files changed, 32 insertions(+), 2 deletions(-)
--- a/arch/arm/include/asm/cacheflush.h
+++ b/arch/arm/include/asm/cacheflush.h
@@ -91,6 +91,21 @@
* DMA Cache Coherency
* ===================
*
+ * dma_inv_range(start, end)
+ *
+ * Invalidate (discard) the specified virtual address range.
+ * May not write back any entries. If 'start' or 'end'
+ * are not cache line aligned, those lines must be written
+ * back.
+ * - start - virtual start address
+ * - end - virtual end address
+ *
+ * dma_clean_range(start, end)
+ *
+ * Clean (write back) the specified virtual address range.
+ * - start - virtual start address
+ * - end - virtual end address
+ *
* dma_flush_range(start, end)
*
* Clean and invalidate the specified virtual address range.
@@ -112,6 +127,8 @@ struct cpu_cache_fns {
void (*dma_map_area)(const void *, size_t, int);
void (*dma_unmap_area)(const void *, size_t, int);
+ void (*dma_inv_range)(const void *, const void *);
+ void (*dma_clean_range)(const void *, const void *);
void (*dma_flush_range)(const void *, const void *);
} __no_randomize_layout;
@@ -137,6 +154,8 @@ extern struct cpu_cache_fns cpu_cache;
* is visible to DMA, or data written by DMA to system memory is
* visible to the CPU.
*/
+#define dmac_inv_range cpu_cache.dma_inv_range
+#define dmac_clean_range cpu_cache.dma_clean_range
#define dmac_flush_range cpu_cache.dma_flush_range
#else
@@ -156,6 +175,8 @@ extern void __cpuc_flush_dcache_area(voi
* is visible to DMA, or data written by DMA to system memory is
* visible to the CPU.
*/
+extern void dmac_inv_range(const void *, const void *);
+extern void dmac_clean_range(const void *, const void *);
extern void dmac_flush_range(const void *, const void *);
#endif
--- a/arch/arm/include/asm/glue-cache.h
+++ b/arch/arm/include/asm/glue-cache.h
@@ -156,6 +156,8 @@ static inline void nop_dma_unmap_area(co
#define __cpuc_flush_dcache_area __glue(_CACHE,_flush_kern_dcache_area)
#define dmac_flush_range __glue(_CACHE,_dma_flush_range)
+#define dmac_inv_range __glue(_CACHE, _dma_inv_range)
+#define dmac_clean_range __glue(_CACHE, _dma_clean_range)
#endif
#endif
--- a/arch/arm/mm/cache-v7.S
+++ b/arch/arm/mm/cache-v7.S
@@ -363,7 +363,7 @@ ENDPROC(v7_flush_kern_dcache_area)
* - start - virtual start address of region
* - end - virtual end address of region
*/
-v7_dma_inv_range:
+ENTRY(v7_dma_inv_range)
dcache_line_size r2, r3
sub r3, r2, #1
tst r0, r3
@@ -393,7 +393,7 @@ ENDPROC(v7_dma_inv_range)
* - start - virtual start address of region
* - end - virtual end address of region
*/
-v7_dma_clean_range:
+ENTRY(v7_dma_clean_range)
dcache_line_size r2, r3
sub r3, r2, #1
bic r0, r0, r3
@@ -479,6 +479,8 @@ ENDPROC(v7_dma_unmap_area)
globl_equ b15_dma_map_area, v7_dma_map_area
globl_equ b15_dma_unmap_area, v7_dma_unmap_area
+ globl_equ b15_dma_inv_range, v7_dma_inv_range
+ globl_equ b15_dma_clean_range, v7_dma_clean_range
globl_equ b15_dma_flush_range, v7_dma_flush_range
define_cache_functions b15
--- a/arch/arm/mm/proc-macros.S
+++ b/arch/arm/mm/proc-macros.S
@@ -336,6 +336,8 @@ ENTRY(\name\()_cache_fns)
.long \name\()_flush_kern_dcache_area
.long \name\()_dma_map_area
.long \name\()_dma_unmap_area
+ .long \name\()_dma_inv_range
+ .long \name\()_dma_clean_range
.long \name\()_dma_flush_range
.size \name\()_cache_fns, . - \name\()_cache_fns
.endm
--- a/arch/arm/mm/proc-syms.c
+++ b/arch/arm/mm/proc-syms.c
@@ -27,6 +27,9 @@ EXPORT_SYMBOL(__cpuc_flush_user_all);
EXPORT_SYMBOL(__cpuc_flush_user_range);
EXPORT_SYMBOL(__cpuc_coherent_kern_range);
EXPORT_SYMBOL(__cpuc_flush_dcache_area);
+EXPORT_SYMBOL(dmac_inv_range);
+EXPORT_SYMBOL(dmac_clean_range);
+EXPORT_SYMBOL(dmac_flush_range);
#else
EXPORT_SYMBOL(cpu_cache);
#endif