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Commit 635c45c1 authored by Jesper Nilsson's avatar Jesper Nilsson
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CRIS v32: Rewrite of stream co-processor driver for ETRAX FS and ARTPEC-3 

- Workaround for cachebug (Guinness TR 106).
- Add ARTPEC-3 support.
parent a77dba6a

arch/cris/arch-v32/drivers/cryptocop.c

+54 −50
Original line number Diff line number Diff line 
/* $Id: cryptocop.c,v 1.13 2005/04/21 17:27:55 henriken Exp $

 *

/*

 * Stream co-processor driver for the ETRAX FS

 *

 *    Copyright (C) 2003-2005  Axis Communications AB

 *    Copyright (C) 2003-2007  Axis Communications AB

 */



#include <linux/init.h>
@@ -25,17 +24,29 @@ 
#include <asm/signal.h>

#include <asm/irq.h>



#include <asm/arch/dma.h>

#include <asm/arch/hwregs/dma.h>

#include <asm/arch/hwregs/reg_map.h>

#include <asm/arch/hwregs/reg_rdwr.h>

#include <asm/arch/hwregs/intr_vect_defs.h>



#include <asm/arch/hwregs/strcop.h>

#include <asm/arch/hwregs/strcop_defs.h>

#include <asm/arch/cryptocop.h>





#include <dma.h>

#include <hwregs/dma.h>

#include <hwregs/reg_map.h>

#include <hwregs/reg_rdwr.h>

#include <hwregs/intr_vect_defs.h>



#include <hwregs/strcop.h>

#include <hwregs/strcop_defs.h>

#include <cryptocop.h>



#ifdef CONFIG_ETRAXFS

#define IN_DMA 9

#define OUT_DMA 8

#define IN_DMA_INST regi_dma9

#define OUT_DMA_INST regi_dma8

#define DMA_IRQ DMA9_INTR_VECT

#else

#define IN_DMA 3

#define OUT_DMA 2

#define IN_DMA_INST regi_dma3

#define OUT_DMA_INST regi_dma2

#define DMA_IRQ DMA3_INTR_VECT

#endif



#define DESCR_ALLOC_PAD  (31)
@@ -1886,14 +1897,14 @@ static void cryptocop_do_tasklet(unsigned long unused) 
}



static irqreturn_t

dma_done_interrupt(int irq, void *dev_id, struct pt_regs * regs)

dma_done_interrupt(int irq, void *dev_id)

{

	struct cryptocop_prio_job *done_job;

	reg_dma_rw_ack_intr ack_intr = {

		.data = 1,

	};



	REG_WR (dma, regi_dma9, rw_ack_intr, ack_intr);

	REG_WR(dma, IN_DMA_INST, rw_ack_intr, ack_intr);



	DEBUG(printk("cryptocop DMA done\n"));
@@ -1937,7 +1948,6 @@ dma_done_interrupt(int irq, void *dev_id, struct pt_regs * regs) 
static int init_cryptocop(void)

{

	unsigned long          flags;

	reg_intr_vect_rw_mask  intr_mask;

	reg_dma_rw_cfg         dma_cfg = {.en = 1};

	reg_dma_rw_intr_mask   intr_mask_in = {.data = regk_dma_yes}; /* Only want descriptor interrupts from the DMA in channel. */

	reg_dma_rw_ack_intr    ack_intr = {.data = 1,.in_eop = 1 };
@@ -1950,10 +1960,14 @@ static int init_cryptocop(void) 
		.en = 1

	};



	if (request_irq(DMA9_INTR_VECT, dma_done_interrupt, 0, "stream co-processor DMA", NULL)) panic("request_irq stream co-processor irq dma9");

	if (request_irq(DMA_IRQ, dma_done_interrupt, 0,

			"stream co-processor DMA", NULL))

		panic("request_irq stream co-processor irq dma9");



	(void)crisv32_request_dma(8, "strcop", DMA_PANIC_ON_ERROR, 0, dma_strp);

	(void)crisv32_request_dma(9, "strcop", DMA_PANIC_ON_ERROR, 0, dma_strp);

	(void)crisv32_request_dma(OUT_DMA, "strcop", DMA_PANIC_ON_ERROR,

		0, dma_strp);

	(void)crisv32_request_dma(IN_DMA, "strcop", DMA_PANIC_ON_ERROR,

		0, dma_strp);



	local_irq_save(flags);
@@ -1963,24 +1977,19 @@ static int init_cryptocop(void) 
	strcop_cfg.en = 1;

	REG_WR(strcop, regi_strcop, rw_cfg, strcop_cfg);



	/* Enable DMA9 interrupt */

	intr_mask = REG_RD(intr_vect, regi_irq, rw_mask);

	intr_mask.dma9 = 1;

	REG_WR(intr_vect, regi_irq, rw_mask, intr_mask);



	/* Enable DMAs. */

	REG_WR(dma, regi_dma9, rw_cfg, dma_cfg); /* input DMA */

	REG_WR(dma, regi_dma8, rw_cfg, dma_cfg); /* output DMA */

	REG_WR(dma, IN_DMA_INST, rw_cfg, dma_cfg); /* input DMA */

	REG_WR(dma, OUT_DMA_INST, rw_cfg, dma_cfg); /* output DMA */



	/* Set up wordsize = 4 for DMAs. */

	DMA_WR_CMD (regi_dma8, regk_dma_set_w_size4);

	DMA_WR_CMD (regi_dma9, regk_dma_set_w_size4);

	DMA_WR_CMD(OUT_DMA_INST, regk_dma_set_w_size4);

	DMA_WR_CMD(IN_DMA_INST, regk_dma_set_w_size4);



	/* Enable interrupts. */

	REG_WR(dma, regi_dma9, rw_intr_mask, intr_mask_in);

	REG_WR(dma, IN_DMA_INST, rw_intr_mask, intr_mask_in);



	/* Clear intr ack. */

	REG_WR(dma, regi_dma9, rw_ack_intr, ack_intr);

	REG_WR(dma, IN_DMA_INST, rw_ack_intr, ack_intr);



	local_irq_restore(flags);
@@ -1991,7 +2000,6 @@ static int init_cryptocop(void) 
static void release_cryptocop(void)

{

	unsigned long          flags;

	reg_intr_vect_rw_mask  intr_mask;

	reg_dma_rw_cfg         dma_cfg = {.en = 0};

	reg_dma_rw_intr_mask   intr_mask_in = {0};

	reg_dma_rw_ack_intr    ack_intr = {.data = 1,.in_eop = 1 };
@@ -1999,26 +2007,21 @@ static void release_cryptocop(void) 
	local_irq_save(flags);



	/* Clear intr ack. */

	REG_WR(dma, regi_dma9, rw_ack_intr, ack_intr);



	/* Disable DMA9 interrupt */

	intr_mask = REG_RD(intr_vect, regi_irq, rw_mask);

	intr_mask.dma9 = 0;

	REG_WR(intr_vect, regi_irq, rw_mask, intr_mask);

	REG_WR(dma, IN_DMA_INST, rw_ack_intr, ack_intr);



	/* Disable DMAs. */

	REG_WR(dma, regi_dma9, rw_cfg, dma_cfg); /* input DMA */

	REG_WR(dma, regi_dma8, rw_cfg, dma_cfg); /* output DMA */

	REG_WR(dma, IN_DMA_INST, rw_cfg, dma_cfg); /* input DMA */

	REG_WR(dma, OUT_DMA_INST, rw_cfg, dma_cfg); /* output DMA */



	/* Disable interrupts. */

	REG_WR(dma, regi_dma9, rw_intr_mask, intr_mask_in);

	REG_WR(dma, IN_DMA_INST, rw_intr_mask, intr_mask_in);



	local_irq_restore(flags);



	free_irq(DMA9_INTR_VECT, NULL);

	free_irq(DMA_IRQ, NULL);



	(void)crisv32_free_dma(8);

	(void)crisv32_free_dma(9);

	(void)crisv32_free_dma(OUT_DMA);

	(void)crisv32_free_dma(IN_DMA);

}
@@ -2076,13 +2079,13 @@ static void cryptocop_job_queue_close(void) 
		reg_dma_rw_cfg    dma_out_cfg, dma_in_cfg;



		/* Stop DMA. */

		dma_out_cfg = REG_RD(dma, regi_dma8, rw_cfg);

		dma_out_cfg = REG_RD(dma, OUT_DMA_INST, rw_cfg);

		dma_out_cfg.en = regk_dma_no;

		REG_WR(dma, regi_dma8, rw_cfg, dma_out_cfg);

		REG_WR(dma, OUT_DMA_INST, rw_cfg, dma_out_cfg);



		dma_in_cfg = REG_RD(dma, regi_dma9, rw_cfg);

		dma_in_cfg = REG_RD(dma, IN_DMA_INST, rw_cfg);

		dma_in_cfg.en = regk_dma_no;

		REG_WR(dma, regi_dma9, rw_cfg, dma_in_cfg);

		REG_WR(dma, IN_DMA_INST, rw_cfg, dma_in_cfg);



		/* Disble the cryptocop. */

		rw_cfg = REG_RD(strcop, regi_strcop, rw_cfg);
@@ -2226,10 +2229,11 @@ static void cryptocop_start_job(void) 
		     &pj->iop->ctx_out, (char*)virt_to_phys(&pj->iop->ctx_out)));



	/* Start input DMA. */

	DMA_START_CONTEXT(regi_dma9, virt_to_phys(&pj->iop->ctx_in));

	flush_dma_context(&pj->iop->ctx_in);

	DMA_START_CONTEXT(IN_DMA_INST, virt_to_phys(&pj->iop->ctx_in));



	/* Start output DMA. */

	DMA_START_CONTEXT(regi_dma8, virt_to_phys(&pj->iop->ctx_out));

	DMA_START_CONTEXT(OUT_DMA_INST, virt_to_phys(&pj->iop->ctx_out));



	spin_unlock_irqrestore(&running_job_lock, running_job_flags);

	DEBUG(printk("cryptocop_start_job: exiting\n"));