diff mbox series

[v14,01/12] swiotlb: Refactor swiotlb init functions

Message ID 20210619034043.199220-2-tientzu@chromium.org (mailing list archive)
State Superseded
Headers show
Series Restricted DMA | expand

Commit Message

Claire Chang June 19, 2021, 3:40 a.m. UTC 
Add a new function, swiotlb_init_io_tlb_mem, for the io_tlb_mem struct
initialization to make the code reusable.

Signed-off-by: Claire Chang <tientzu@chromium.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Tested-by: Stefano Stabellini <sstabellini@kernel.org>
Tested-by: Will Deacon <will@kernel.org>
---
 kernel/dma/swiotlb.c | 50 ++++++++++++++++++++++----------------------
 1 file changed, 25 insertions(+), 25 deletions(-)

Comments

Stefano Stabellini June 22, 2021, 9:02 p.m. UTC | #1 
On Sat, 19 Jun 2021, Claire Chang wrote:
> Add a new function, swiotlb_init_io_tlb_mem, for the io_tlb_mem struct
> initialization to make the code reusable.
> 
> Signed-off-by: Claire Chang <tientzu@chromium.org>
> Reviewed-by: Christoph Hellwig <hch@lst.de>
> Tested-by: Stefano Stabellini <sstabellini@kernel.org>
> Tested-by: Will Deacon <will@kernel.org>

Acked-by: Stefano Stabellini <sstabellini@kernel.org>


> ---
>  kernel/dma/swiotlb.c | 50 ++++++++++++++++++++++----------------------
>  1 file changed, 25 insertions(+), 25 deletions(-)
> 
> diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
> index 52e2ac526757..1f9b2b9e7490 100644
> --- a/kernel/dma/swiotlb.c
> +++ b/kernel/dma/swiotlb.c
> @@ -168,9 +168,28 @@ void __init swiotlb_update_mem_attributes(void)
>  	memset(vaddr, 0, bytes);
>  }
>  
> -int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose)
> +static void swiotlb_init_io_tlb_mem(struct io_tlb_mem *mem, phys_addr_t start,
> +				    unsigned long nslabs, bool late_alloc)
>  {
> +	void *vaddr = phys_to_virt(start);
>  	unsigned long bytes = nslabs << IO_TLB_SHIFT, i;
> +
> +	mem->nslabs = nslabs;
> +	mem->start = start;
> +	mem->end = mem->start + bytes;
> +	mem->index = 0;
> +	mem->late_alloc = late_alloc;
> +	spin_lock_init(&mem->lock);
> +	for (i = 0; i < mem->nslabs; i++) {
> +		mem->slots[i].list = IO_TLB_SEGSIZE - io_tlb_offset(i);
> +		mem->slots[i].orig_addr = INVALID_PHYS_ADDR;
> +		mem->slots[i].alloc_size = 0;
> +	}
> +	memset(vaddr, 0, bytes);
> +}
> +
> +int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose)
> +{
>  	struct io_tlb_mem *mem;
>  	size_t alloc_size;
>  
> @@ -186,16 +205,8 @@ int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose)
>  	if (!mem)
>  		panic("%s: Failed to allocate %zu bytes align=0x%lx\n",
>  		      __func__, alloc_size, PAGE_SIZE);
> -	mem->nslabs = nslabs;
> -	mem->start = __pa(tlb);
> -	mem->end = mem->start + bytes;
> -	mem->index = 0;
> -	spin_lock_init(&mem->lock);
> -	for (i = 0; i < mem->nslabs; i++) {
> -		mem->slots[i].list = IO_TLB_SEGSIZE - io_tlb_offset(i);
> -		mem->slots[i].orig_addr = INVALID_PHYS_ADDR;
> -		mem->slots[i].alloc_size = 0;
> -	}
> +
> +	swiotlb_init_io_tlb_mem(mem, __pa(tlb), nslabs, false);
>  
>  	io_tlb_default_mem = mem;
>  	if (verbose)
> @@ -282,8 +293,8 @@ swiotlb_late_init_with_default_size(size_t default_size)
>  int
>  swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs)
>  {
> -	unsigned long bytes = nslabs << IO_TLB_SHIFT, i;
>  	struct io_tlb_mem *mem;
> +	unsigned long bytes = nslabs << IO_TLB_SHIFT;
>  
>  	if (swiotlb_force == SWIOTLB_NO_FORCE)
>  		return 0;
> @@ -297,20 +308,9 @@ swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs)
>  	if (!mem)
>  		return -ENOMEM;
>  
> -	mem->nslabs = nslabs;
> -	mem->start = virt_to_phys(tlb);
> -	mem->end = mem->start + bytes;
> -	mem->index = 0;
> -	mem->late_alloc = 1;
> -	spin_lock_init(&mem->lock);
> -	for (i = 0; i < mem->nslabs; i++) {
> -		mem->slots[i].list = IO_TLB_SEGSIZE - io_tlb_offset(i);
> -		mem->slots[i].orig_addr = INVALID_PHYS_ADDR;
> -		mem->slots[i].alloc_size = 0;
> -	}
> -
> +	memset(mem, 0, sizeof(*mem));
>  	set_memory_decrypted((unsigned long)tlb, bytes >> PAGE_SHIFT);
> -	memset(tlb, 0, bytes);
> +	swiotlb_init_io_tlb_mem(mem, virt_to_phys(tlb), nslabs, true);
>  
>  	io_tlb_default_mem = mem;
>  	swiotlb_print_info();
> -- 
> 2.32.0.288.g62a8d224e6-goog
>
diff mbox series

Patch

diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index 52e2ac526757..1f9b2b9e7490 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -168,9 +168,28 @@  void __init swiotlb_update_mem_attributes(void)
 	memset(vaddr, 0, bytes);
 }
 
-int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose)
+static void swiotlb_init_io_tlb_mem(struct io_tlb_mem *mem, phys_addr_t start,
+				    unsigned long nslabs, bool late_alloc)
 {
+	void *vaddr = phys_to_virt(start);
 	unsigned long bytes = nslabs << IO_TLB_SHIFT, i;
+
+	mem->nslabs = nslabs;
+	mem->start = start;
+	mem->end = mem->start + bytes;
+	mem->index = 0;
+	mem->late_alloc = late_alloc;
+	spin_lock_init(&mem->lock);
+	for (i = 0; i < mem->nslabs; i++) {
+		mem->slots[i].list = IO_TLB_SEGSIZE - io_tlb_offset(i);
+		mem->slots[i].orig_addr = INVALID_PHYS_ADDR;
+		mem->slots[i].alloc_size = 0;
+	}
+	memset(vaddr, 0, bytes);
+}
+
+int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose)
+{
 	struct io_tlb_mem *mem;
 	size_t alloc_size;
 
@@ -186,16 +205,8 @@  int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose)
 	if (!mem)
 		panic("%s: Failed to allocate %zu bytes align=0x%lx\n",
 		      __func__, alloc_size, PAGE_SIZE);
-	mem->nslabs = nslabs;
-	mem->start = __pa(tlb);
-	mem->end = mem->start + bytes;
-	mem->index = 0;
-	spin_lock_init(&mem->lock);
-	for (i = 0; i < mem->nslabs; i++) {
-		mem->slots[i].list = IO_TLB_SEGSIZE - io_tlb_offset(i);
-		mem->slots[i].orig_addr = INVALID_PHYS_ADDR;
-		mem->slots[i].alloc_size = 0;
-	}
+
+	swiotlb_init_io_tlb_mem(mem, __pa(tlb), nslabs, false);
 
 	io_tlb_default_mem = mem;
 	if (verbose)
@@ -282,8 +293,8 @@  swiotlb_late_init_with_default_size(size_t default_size)
 int
 swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs)
 {
-	unsigned long bytes = nslabs << IO_TLB_SHIFT, i;
 	struct io_tlb_mem *mem;
+	unsigned long bytes = nslabs << IO_TLB_SHIFT;
 
 	if (swiotlb_force == SWIOTLB_NO_FORCE)
 		return 0;
@@ -297,20 +308,9 @@  swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs)
 	if (!mem)
 		return -ENOMEM;
 
-	mem->nslabs = nslabs;
-	mem->start = virt_to_phys(tlb);
-	mem->end = mem->start + bytes;
-	mem->index = 0;
-	mem->late_alloc = 1;
-	spin_lock_init(&mem->lock);
-	for (i = 0; i < mem->nslabs; i++) {
-		mem->slots[i].list = IO_TLB_SEGSIZE - io_tlb_offset(i);
-		mem->slots[i].orig_addr = INVALID_PHYS_ADDR;
-		mem->slots[i].alloc_size = 0;
-	}
-
+	memset(mem, 0, sizeof(*mem));
 	set_memory_decrypted((unsigned long)tlb, bytes >> PAGE_SHIFT);
-	memset(tlb, 0, bytes);
+	swiotlb_init_io_tlb_mem(mem, virt_to_phys(tlb), nslabs, true);
 
 	io_tlb_default_mem = mem;
 	swiotlb_print_info();