[U-Boot] [PATCH 3/3][v3] crypto/fsl: SEC driver cleanup for 64 bit and endianness

[York Sun <yorksun@freescale.com>]

On 09/17/2015 03:46 AM, Aneesh Bansal wrote:
> The SEC driver code has been cleaned up to work for 64 bit
> physical addresses and systems where endianess of SEC block
> is different from the Core.
> Changes:
> 1. Descriptor created on Core is modified as per SEC block
>    endianness before the job is submitted.
> 2. The read/write of physical addresses to Job Rings will
>    be depend on endianness of SEC block as 32 bit low and
>    high part of the 64 bit address will vary.
> 3. The 32 bit low and high part of the 64 bit address in
>    descriptor will vary depending on endianness of SEC.
> 
> Signed-off-by: Aneesh Bansal <aneesh.bansal@freescale.com>
> ---
> Changes in v3:sec_out_phys and sec_in_phys 
> The rwad/write for 64 bit address is done using 32 bit
> aadr_lo and addr_hi. There is no need to define wrapper
> functions sec_out_phys and sec_in_phys.
> 
>  drivers/crypto/fsl/desc_constr.h | 26 +++++++++++++
>  drivers/crypto/fsl/fsl_hash.c    |  8 ++--
>  drivers/crypto/fsl/jr.c          | 83 ++++++++++++++++++++++++++++++++++------
>  drivers/crypto/fsl/jr.h          |  7 ++--
>  include/fsl_sec.h                |  6 +--
>  5 files changed, 106 insertions(+), 24 deletions(-)
> 

<snip>

> diff --git a/drivers/crypto/fsl/jr.c b/drivers/crypto/fsl/jr.c
> index 17392c9..c88c727 100644
> --- a/drivers/crypto/fsl/jr.c
> +++ b/drivers/crypto/fsl/jr.c
> @@ -11,6 +11,7 @@
>  #include "fsl_sec.h"
>  #include "jr.h"
>  #include "jobdesc.h"
> +#include "desc_constr.h"
>  
>  #define CIRC_CNT(head, tail, size)	(((head) - (tail)) & (size - 1))
>  #define CIRC_SPACE(head, tail, size)	CIRC_CNT((tail), (head) + 1, (size))
> @@ -154,19 +155,35 @@ static int jr_hw_reset(void)
>  
>  /* -1 --- error, can't enqueue -- no space available */
>  static int jr_enqueue(uint32_t *desc_addr,
> -	       void (*callback)(uint32_t desc, uint32_t status, void *arg),
> +	       void (*callback)(uint32_t status, void *arg),
>  	       void *arg)
>  {
>  	struct jr_regs *regs = (struct jr_regs *)CONFIG_SYS_FSL_JR0_ADDR;
>  	int head = jr.head;
> -	dma_addr_t desc_phys_addr = virt_to_phys(desc_addr);
> +	uint32_t desc_word;
> +	int length = desc_len(desc_addr);
> +	int i;
> +#ifdef CONFIG_PHYS_64BIT
> +	uint32_t *addr_hi, *addr_lo;
> +#endif
> +
> +	/* The descriptor must be submitted to SEC block as per endianness
> +	 * of the SEC Block.
> +	 * So, if the endianness of Core and SEC block is different, each word
> +	 * of the descriptor will be byte-swapped.
> +	 */
> +	for (i = 0; i < length; i++) {
> +		desc_word = desc_addr[i];
> +		sec_out32((uint32_t *)&desc_addr[i], desc_word);
> +	}
> +
> +	phys_addr_t desc_phys_addr = virt_to_phys(desc_addr);
>  
>  	if (sec_in32(&regs->irsa) == 0 ||
>  	    CIRC_SPACE(jr.head, jr.tail, jr.size) <= 0)
>  		return -1;
>  
>  	jr.info[head].desc_phys_addr = desc_phys_addr;
> -	jr.info[head].desc_addr = (uint32_t)desc_addr;
>  	jr.info[head].callback = (void *)callback;
>  	jr.info[head].arg = arg;
>  	jr.info[head].op_done = 0;
> @@ -177,9 +194,29 @@ static int jr_enqueue(uint32_t *desc_addr,
>  					ARCH_DMA_MINALIGN);
>  	flush_dcache_range(start, end);
>  
> -	jr.input_ring[head] = desc_phys_addr;
> +#ifdef CONFIG_PHYS_64BIT
> +	/* Write the 64 bit Descriptor address on Input Ring.
> +	 * The 32 bit hign and low part of the address will
> +	 * depend on endianness of SEC block.
> +	 */
> +#ifdef CONFIG_SYS_FSL_SEC_LE
> +	addr_lo = (uint32_t *)(&jr.input_ring[head]);
> +	addr_hi = (uint32_t *)(&jr.input_ring[head]) + 1;
> +#elif defined(CONFIG_SYS_FSL_SEC_BE)
> +	addr_hi = (uint32_t *)(&jr.input_ring[head]);
> +	addr_lo = (uint32_t *)(&jr.input_ring[head]) + 1;
> +#endif /* ifdef CONFIG_SYS_FSL_SEC_LE */
> +
> +	sec_out32(addr_hi, (uint32_t)(desc_phys_addr >> 32));
> +	sec_out32(addr_lo, (uint32_t)(desc_phys_addr));
> +
> +#else
> +	/* Write the 32 bit Descriptor address on Input Ring. */
> +	sec_out32(&jr.input_ring[head], desc_phys_addr);
> +#endif /* ifdef CONFIG_PHYS_64BIT */
> +
>  	start = (unsigned long)&jr.input_ring[head] & ~(ARCH_DMA_MINALIGN - 1);
> -	end = ALIGN(start + sizeof(dma_addr_t), ARCH_DMA_MINALIGN);
> +	end = ALIGN(start + sizeof(phys_addr_t), ARCH_DMA_MINALIGN);
>  	flush_dcache_range(start, end);
>  
>  	jr.head = (head + 1) & (jr.size - 1);
> @@ -195,8 +232,11 @@ static int jr_dequeue(void)
>  	int head = jr.head;
>  	int tail = jr.tail;
>  	int idx, i, found;
> -	void (*callback)(uint32_t desc, uint32_t status, void *arg);
> +	void (*callback)(uint32_t status, void *arg);
>  	void *arg = NULL;
> +#ifdef CONFIG_PHYS_64BIT
> +	uint32_t *addr_hi, *addr_lo;
> +#endif
>  
>  	while (sec_in32(&regs->orsf) && CIRC_CNT(jr.head, jr.tail, jr.size)) {
>  		unsigned long start = (unsigned long)jr.output_ring &
> @@ -208,14 +248,33 @@ static int jr_dequeue(void)
>  
>  		found = 0;
>  
> -		dma_addr_t op_desc = jr.output_ring[jr.tail].desc;
> -		uint32_t status = jr.output_ring[jr.tail].status;
> -		uint32_t desc_virt;
> +		phys_addr_t op_desc;
> +	#ifdef CONFIG_PHYS_64BIT
> +		/* Read the 64 bit Descriptor address from Output Ring.
> +		 * The 32 bit hign and low part of the address will
> +		 * depend on endianness of SEC block.
> +		 */
> +	#ifdef CONFIG_SYS_FSL_SEC_LE
> +		addr_lo = (uint32_t *)(&jr.output_ring[jr.tail].desc);
> +		addr_hi = (uint32_t *)(&jr.output_ring[jr.tail].desc) + 1;
> +	#elif defined(CONFIG_SYS_FSL_SEC_BE)
> +		addr_hi = (uint32_t *)(&jr.output_ring[jr.tail].desc);
> +		addr_lo = (uint32_t *)(&jr.output_ring[jr.tail].desc) + 1;
> +	#endif /* ifdef CONFIG_SYS_FSL_SEC_LE */
> +
> +		op_desc = ((u64)sec_in32(addr_hi) << 32) |
> +			  ((u64)sec_in32(addr_lo));
> +
> +	#else
> +		/* Read the 32 bit Descriptor address from Output Ring. */
> +		op_desc = sec_in32(&jr.output_ring[jr.tail].desc);

I got a warning when compiling for ls1021a targets

../drivers/crypto/fsl/jr.c: In function ?jr_dequeue?:
../drivers/crypto/fsl/jr.c:270:3: warning: dereferencing type-punned pointer
will break strict-aliasing rules [-Wstrict-aliasing]

York