[deliverable/linux.git] / drivers / crypto / caam / jr.c

/*
 * CAAM/SEC 4.x transport/backend driver
 * JobR backend functionality
 *
 * Copyright 2008-2012 Freescale Semiconductor, Inc.
 */

#include <linux/of_irq.h>

#include "compat.h"
#include "regs.h"
#include "jr.h"
#include "desc.h"
#include "intern.h"

/* Main per-ring interrupt handler */
static irqreturn_t caam_jr_interrupt(int irq, void *st_dev)
{
	struct device *dev = st_dev;
	struct caam_drv_private_jr *jrp = dev_get_drvdata(dev);
	u32 irqstate;

	/*
	 * Check the output ring for ready responses, kick
	 * tasklet if jobs done.
	 */
	irqstate = rd_reg32(&jrp->rregs->jrintstatus);
	if (!irqstate)
		return IRQ_NONE;

	/*
	 * If JobR error, we got more development work to do
	 * Flag a bug now, but we really need to shut down and
	 * restart the queue (and fix code).
	 */
	if (irqstate & JRINT_JR_ERROR) {
		dev_err(dev, "job ring error: irqstate: %08x\n", irqstate);
		BUG();
	}

	/* mask valid interrupts */
	setbits32(&jrp->rregs->rconfig_lo, JRCFG_IMSK);

	/* Have valid interrupt at this point, just ACK and trigger */
	wr_reg32(&jrp->rregs->jrintstatus, irqstate);

	preempt_disable();
	tasklet_schedule(&jrp->irqtask);
	preempt_enable();

	return IRQ_HANDLED;
}

/* Deferred service handler, run as interrupt-fired tasklet */
static void caam_jr_dequeue(unsigned long devarg)
{
	int hw_idx, sw_idx, i, head, tail;
	struct device *dev = (struct device *)devarg;
	struct caam_drv_private_jr *jrp = dev_get_drvdata(dev);
	void (*usercall)(struct device *dev, u32 *desc, u32 status, void *arg);
	u32 *userdesc, userstatus;
	void *userarg;

	while (rd_reg32(&jrp->rregs->outring_used)) {

		head = ACCESS_ONCE(jrp->head);

		spin_lock(&jrp->outlock);

		sw_idx = tail = jrp->tail;
		hw_idx = jrp->out_ring_read_index;

		for (i = 0; CIRC_CNT(head, tail + i, JOBR_DEPTH) >= 1; i++) {
			sw_idx = (tail + i) & (JOBR_DEPTH - 1);

			smp_read_barrier_depends();

			if (jrp->outring[hw_idx].desc ==
			    jrp->entinfo[sw_idx].desc_addr_dma)
				break; /* found */
		}
		/* we should never fail to find a matching descriptor */
		BUG_ON(CIRC_CNT(head, tail + i, JOBR_DEPTH) <= 0);

		/* Unmap just-run descriptor so we can post-process */
		dma_unmap_single(dev, jrp->outring[hw_idx].desc,
				 jrp->entinfo[sw_idx].desc_size,
				 DMA_TO_DEVICE);

		/* mark completed, avoid matching on a recycled desc addr */
		jrp->entinfo[sw_idx].desc_addr_dma = 0;

		/* Stash callback params for use outside of lock */
		usercall = jrp->entinfo[sw_idx].callbk;
		userarg = jrp->entinfo[sw_idx].cbkarg;
		userdesc = jrp->entinfo[sw_idx].desc_addr_virt;
		userstatus = jrp->outring[hw_idx].jrstatus;

		/* set done */
		wr_reg32(&jrp->rregs->outring_rmvd, 1);

		jrp->out_ring_read_index = (jrp->out_ring_read_index + 1) &
					   (JOBR_DEPTH - 1);

		/*
		 * if this job completed out-of-order, do not increment
		 * the tail.  Otherwise, increment tail by 1 plus the
		 * number of subsequent jobs already completed out-of-order
		 */
		if (sw_idx == tail) {
			do {
				tail = (tail + 1) & (JOBR_DEPTH - 1);
				smp_read_barrier_depends();
			} while (CIRC_CNT(head, tail, JOBR_DEPTH) >= 1 &&
				 jrp->entinfo[tail].desc_addr_dma == 0);

			jrp->tail = tail;
		}

		spin_unlock(&jrp->outlock);

		/* Finally, execute user's callback */
		usercall(dev, userdesc, userstatus, userarg);
	}

	/* reenable / unmask IRQs */
	clrbits32(&jrp->rregs->rconfig_lo, JRCFG_IMSK);
}

/**
 * caam_jr_enqueue() - Enqueue a job descriptor head. Returns 0 if OK,
 * -EBUSY if the queue is full, -EIO if it cannot map the caller's
 * descriptor.
 * @dev:  device of the job ring to be used. This device should have
 *        been assigned prior by caam_jr_register().
 * @desc: points to a job descriptor that execute our request. All
 *        descriptors (and all referenced data) must be in a DMAable
 *        region, and all data references must be physical addresses
 *        accessible to CAAM (i.e. within a PAMU window granted
 *        to it).
 * @cbk:  pointer to a callback function to be invoked upon completion
 *        of this request. This has the form:
 *        callback(struct device *dev, u32 *desc, u32 stat, void *arg)
 *        where:
 *        @dev:    contains the job ring device that processed this
 *                 response.
 *        @desc:   descriptor that initiated the request, same as
 *                 "desc" being argued to caam_jr_enqueue().
 *        @status: untranslated status received from CAAM. See the
 *                 reference manual for a detailed description of
 *                 error meaning, or see the JRSTA definitions in the
 *                 register header file
 *        @areq:   optional pointer to an argument passed with the
 *                 original request
 * @areq: optional pointer to a user argument for use at callback
 *        time.
 **/
int caam_jr_enqueue(struct device *dev, u32 *desc,
		    void (*cbk)(struct device *dev, u32 *desc,
				u32 status, void *areq),
		    void *areq)
{
	struct caam_drv_private_jr *jrp = dev_get_drvdata(dev);
	struct caam_jrentry_info *head_entry;
	int head, tail, desc_size;
	dma_addr_t desc_dma;

	desc_size = (*desc & HDR_JD_LENGTH_MASK) * sizeof(u32);
	desc_dma = dma_map_single(dev, desc, desc_size, DMA_TO_DEVICE);
	if (dma_mapping_error(dev, desc_dma)) {
		dev_err(dev, "caam_jr_enqueue(): can't map jobdesc\n");
		return -EIO;
	}

	spin_lock_bh(&jrp->inplock);

	head = jrp->head;
	tail = ACCESS_ONCE(jrp->tail);

	if (!rd_reg32(&jrp->rregs->inpring_avail) ||
	    CIRC_SPACE(head, tail, JOBR_DEPTH) <= 0) {
		spin_unlock_bh(&jrp->inplock);
		dma_unmap_single(dev, desc_dma, desc_size, DMA_TO_DEVICE);
		return -EBUSY;
	}

	head_entry = &jrp->entinfo[head];
	head_entry->desc_addr_virt = desc;
	head_entry->desc_size = desc_size;
	head_entry->callbk = (void *)cbk;
	head_entry->cbkarg = areq;
	head_entry->desc_addr_dma = desc_dma;

	jrp->inpring[jrp->inp_ring_write_index] = desc_dma;

	smp_wmb();

	jrp->inp_ring_write_index = (jrp->inp_ring_write_index + 1) &
				    (JOBR_DEPTH - 1);
	jrp->head = (head + 1) & (JOBR_DEPTH - 1);

	wr_reg32(&jrp->rregs->inpring_jobadd, 1);

	spin_unlock_bh(&jrp->inplock);

	return 0;
}
EXPORT_SYMBOL(caam_jr_enqueue);

static int caam_reset_hw_jr(struct device *dev)
{
	struct caam_drv_private_jr *jrp = dev_get_drvdata(dev);
	unsigned int timeout = 100000;

	/*
	 * mask interrupts since we are going to poll
	 * for reset completion status
	 */
	setbits32(&jrp->rregs->rconfig_lo, JRCFG_IMSK);

	/* initiate flush (required prior to reset) */
	wr_reg32(&jrp->rregs->jrcommand, JRCR_RESET);
	while (((rd_reg32(&jrp->rregs->jrintstatus) & JRINT_ERR_HALT_MASK) ==
		JRINT_ERR_HALT_INPROGRESS) && --timeout)
		cpu_relax();

	if ((rd_reg32(&jrp->rregs->jrintstatus) & JRINT_ERR_HALT_MASK) !=
	    JRINT_ERR_HALT_COMPLETE || timeout == 0) {
		dev_err(dev, "failed to flush job ring %d\n", jrp->ridx);
		return -EIO;
	}

	/* initiate reset */
	timeout = 100000;
	wr_reg32(&jrp->rregs->jrcommand, JRCR_RESET);
	while ((rd_reg32(&jrp->rregs->jrcommand) & JRCR_RESET) && --timeout)
		cpu_relax();

	if (timeout == 0) {
		dev_err(dev, "failed to reset job ring %d\n", jrp->ridx);
		return -EIO;
	}

	/* unmask interrupts */
	clrbits32(&jrp->rregs->rconfig_lo, JRCFG_IMSK);

	return 0;
}

/*
 * Init JobR independent of platform property detection
 */
static int caam_jr_init(struct device *dev)
{
	struct caam_drv_private_jr *jrp;
	dma_addr_t inpbusaddr, outbusaddr;
	int i, error;

	jrp = dev_get_drvdata(dev);

	tasklet_init(&jrp->irqtask, caam_jr_dequeue, (unsigned long)dev);

	/* Connect job ring interrupt handler. */
	error = request_irq(jrp->irq, caam_jr_interrupt, IRQF_SHARED,
			    "caam-jobr", dev);
	if (error) {
		dev_err(dev, "can't connect JobR %d interrupt (%d)\n",
			jrp->ridx, jrp->irq);
		irq_dispose_mapping(jrp->irq);
		jrp->irq = 0;
		return -EINVAL;
	}

	error = caam_reset_hw_jr(dev);
	if (error)
		return error;

	jrp->inpring = dma_alloc_coherent(dev, sizeof(dma_addr_t) * JOBR_DEPTH,
					  &inpbusaddr, GFP_KERNEL);

	jrp->outring = dma_alloc_coherent(dev, sizeof(struct jr_outentry) *
					  JOBR_DEPTH, &outbusaddr, GFP_KERNEL);

	jrp->entinfo = kzalloc(sizeof(struct caam_jrentry_info) * JOBR_DEPTH,
			       GFP_KERNEL);

	if ((jrp->inpring == NULL) || (jrp->outring == NULL) ||
	    (jrp->entinfo == NULL)) {
		dev_err(dev, "can't allocate job rings for %d\n",
			jrp->ridx);
		return -ENOMEM;
	}

	for (i = 0; i < JOBR_DEPTH; i++)
		jrp->entinfo[i].desc_addr_dma = !0;

	/* Setup rings */
	jrp->inp_ring_write_index = 0;
	jrp->out_ring_read_index = 0;
	jrp->head = 0;
	jrp->tail = 0;

	wr_reg64(&jrp->rregs->inpring_base, inpbusaddr);
	wr_reg64(&jrp->rregs->outring_base, outbusaddr);
	wr_reg32(&jrp->rregs->inpring_size, JOBR_DEPTH);
	wr_reg32(&jrp->rregs->outring_size, JOBR_DEPTH);

	jrp->ringsize = JOBR_DEPTH;

	spin_lock_init(&jrp->inplock);
	spin_lock_init(&jrp->outlock);

	/* Select interrupt coalescing parameters */
	setbits32(&jrp->rregs->rconfig_lo, JOBR_INTC |
		  (JOBR_INTC_COUNT_THLD << JRCFG_ICDCT_SHIFT) |
		  (JOBR_INTC_TIME_THLD << JRCFG_ICTT_SHIFT));

	return 0;
}

/*
 * Shutdown JobR independent of platform property code
 */
int caam_jr_shutdown(struct device *dev)
{
	struct caam_drv_private_jr *jrp = dev_get_drvdata(dev);
	dma_addr_t inpbusaddr, outbusaddr;
	int ret;

	ret = caam_reset_hw_jr(dev);

	tasklet_kill(&jrp->irqtask);

	/* Release interrupt */
	free_irq(jrp->irq, dev);

	/* Free rings */
	inpbusaddr = rd_reg64(&jrp->rregs->inpring_base);
	outbusaddr = rd_reg64(&jrp->rregs->outring_base);
	dma_free_coherent(dev, sizeof(dma_addr_t) * JOBR_DEPTH,
			  jrp->inpring, inpbusaddr);
	dma_free_coherent(dev, sizeof(struct jr_outentry) * JOBR_DEPTH,
			  jrp->outring, outbusaddr);
	kfree(jrp->entinfo);
	of_device_unregister(jrp->jr_pdev);

	return ret;
}

/*
 * Probe routine for each detected JobR subsystem. It assumes that
 * property detection was picked up externally.
 */
int caam_jr_probe(struct platform_device *pdev, struct device_node *np,
		  int ring)
{
	struct device *ctrldev, *jrdev;
	struct platform_device *jr_pdev;
	struct caam_drv_private *ctrlpriv;
	struct caam_drv_private_jr *jrpriv;
	u32 *jroffset;
	int error;

	ctrldev = &pdev->dev;
	ctrlpriv = dev_get_drvdata(ctrldev);

	jrpriv = kmalloc(sizeof(struct caam_drv_private_jr),
			 GFP_KERNEL);
	if (jrpriv == NULL) {
		dev_err(ctrldev, "can't alloc private mem for job ring %d\n",
			ring);
		return -ENOMEM;
	}
	jrpriv->parentdev = ctrldev; /* point back to parent */
	jrpriv->ridx = ring; /* save ring identity relative to detection */

	/*
	 * Derive a pointer to the detected JobRs regs
	 * Driver has already iomapped the entire space, we just
	 * need to add in the offset to this JobR. Don't know if I
	 * like this long-term, but it'll run
	 */
	jroffset = (u32 *)of_get_property(np, "reg", NULL);
	jrpriv->rregs = (struct caam_job_ring __iomem *)((void *)ctrlpriv->ctrl
							 + *jroffset);

	/* Build a local dev for each detected queue */
	jr_pdev = of_platform_device_create(np, NULL, ctrldev);
	if (jr_pdev == NULL) {
		kfree(jrpriv);
		return -EINVAL;
	}

	jrpriv->jr_pdev = jr_pdev;
	jrdev = &jr_pdev->dev;
	dev_set_drvdata(jrdev, jrpriv);
	ctrlpriv->jrdev[ring] = jrdev;

	if (sizeof(dma_addr_t) == sizeof(u64))
		if (of_device_is_compatible(np, "fsl,sec-v5.0-job-ring"))
			dma_set_mask(jrdev, DMA_BIT_MASK(40));
		else
			dma_set_mask(jrdev, DMA_BIT_MASK(36));
	else
		dma_set_mask(jrdev, DMA_BIT_MASK(32));

	/* Identify the interrupt */
	jrpriv->irq = of_irq_to_resource(np, 0, NULL);

	/* Now do the platform independent part */
	error = caam_jr_init(jrdev); /* now turn on hardware */
	if (error) {
		of_device_unregister(jr_pdev);
		kfree(jrpriv);
		return error;
	}

	return error;
}
Commit	Line	Data
8e8ec596 KP	1	/*
	2	* CAAM/SEC 4.x transport/backend driver
	3	* JobR backend functionality
	4	*
4bba1e9f	5	* Copyright 2008-2012 Freescale Semiconductor, Inc.
8e8ec596 KP	6	*/
8e8ec596 KP	7
5af50730 RH	8	#include <linux/of_irq.h>
5af50730 RH	9
8e8ec596 KP	10	#include "compat.h"
	11	#include "regs.h"
	12	#include "jr.h"
	13	#include "desc.h"
	14	#include "intern.h"
	15
	16	/* Main per-ring interrupt handler */
	17	static irqreturn_t caam_jr_interrupt(int irq, void *st_dev)
	18	{
	19	struct device *dev = st_dev;
	20	struct caam_drv_private_jr *jrp = dev_get_drvdata(dev);
	21	u32 irqstate;
	22
	23	/*
	24	* Check the output ring for ready responses, kick
	25	* tasklet if jobs done.
	26	*/
	27	irqstate = rd_reg32(&jrp->rregs->jrintstatus);
	28	if (!irqstate)
	29	return IRQ_NONE;
	30
	31	/*
	32	* If JobR error, we got more development work to do
	33	* Flag a bug now, but we really need to shut down and
	34	* restart the queue (and fix code).
	35	*/
	36	if (irqstate & JRINT_JR_ERROR) {
	37	dev_err(dev, "job ring error: irqstate: %08x\n", irqstate);
	38	BUG();
	39	}
	40
	41	/* mask valid interrupts */
	42	setbits32(&jrp->rregs->rconfig_lo, JRCFG_IMSK);
	43
	44	/* Have valid interrupt at this point, just ACK and trigger */
	45	wr_reg32(&jrp->rregs->jrintstatus, irqstate);
	46
	47	preempt_disable();
a0ca6ca0	48	tasklet_schedule(&jrp->irqtask);
8e8ec596 KP	49	preempt_enable();
	50
	51	return IRQ_HANDLED;
	52	}
	53
	54	/* Deferred service handler, run as interrupt-fired tasklet */
	55	static void caam_jr_dequeue(unsigned long devarg)
	56	{
	57	int hw_idx, sw_idx, i, head, tail;
	58	struct device dev = (struct device )devarg;
	59	struct caam_drv_private_jr *jrp = dev_get_drvdata(dev);
	60	void (usercall)(struct device dev, u32 desc, u32 status, void arg);
	61	u32 *userdesc, userstatus;
	62	void *userarg;
8e8ec596	63
a8ea07c2	64	while (rd_reg32(&jrp->rregs->outring_used)) {
8e8ec596	65
a8ea07c2	66	head = ACCESS_ONCE(jrp->head);
8e8ec596	67
ce026cb9	68	spin_lock(&jrp->outlock);
8e8ec596	69
a8ea07c2	70	sw_idx = tail = jrp->tail;
8e8ec596	71	hw_idx = jrp->out_ring_read_index;
a8ea07c2	72
8e8ec596 KP	73	for (i = 0; CIRC_CNT(head, tail + i, JOBR_DEPTH) >= 1; i++) {
	74	sw_idx = (tail + i) & (JOBR_DEPTH - 1);
	75
	76	smp_read_barrier_depends();
	77
	78	if (jrp->outring[hw_idx].desc ==
	79	jrp->entinfo[sw_idx].desc_addr_dma)
	80	break; /* found */
	81	}
	82	/* we should never fail to find a matching descriptor */
	83	BUG_ON(CIRC_CNT(head, tail + i, JOBR_DEPTH) <= 0);
	84
	85	/* Unmap just-run descriptor so we can post-process */
	86	dma_unmap_single(dev, jrp->outring[hw_idx].desc,
	87	jrp->entinfo[sw_idx].desc_size,
	88	DMA_TO_DEVICE);
	89
	90	/* mark completed, avoid matching on a recycled desc addr */
	91	jrp->entinfo[sw_idx].desc_addr_dma = 0;
	92
	93	/* Stash callback params for use outside of lock */
	94	usercall = jrp->entinfo[sw_idx].callbk;
	95	userarg = jrp->entinfo[sw_idx].cbkarg;
	96	userdesc = jrp->entinfo[sw_idx].desc_addr_virt;
	97	userstatus = jrp->outring[hw_idx].jrstatus;
	98
14a8e29c KP	99	/* set done */
14a8e29c KP	100	wr_reg32(&jrp->rregs->outring_rmvd, 1);
8e8ec596 KP	101
	102	jrp->out_ring_read_index = (jrp->out_ring_read_index + 1) &
	103	(JOBR_DEPTH - 1);
	104
	105	/*
	106	* if this job completed out-of-order, do not increment
	107	* the tail. Otherwise, increment tail by 1 plus the
	108	* number of subsequent jobs already completed out-of-order
	109	*/
	110	if (sw_idx == tail) {
	111	do {
	112	tail = (tail + 1) & (JOBR_DEPTH - 1);
	113	smp_read_barrier_depends();
	114	} while (CIRC_CNT(head, tail, JOBR_DEPTH) >= 1 &&
	115	jrp->entinfo[tail].desc_addr_dma == 0);
	116
	117	jrp->tail = tail;
	118	}
	119
ce026cb9	120	spin_unlock(&jrp->outlock);
8e8ec596 KP	121
	122	/* Finally, execute user's callback */
	123	usercall(dev, userdesc, userstatus, userarg);
8e8ec596 KP	124	}
8e8ec596 KP	125
8e8ec596 KP	126	/* reenable / unmask IRQs */
	127	clrbits32(&jrp->rregs->rconfig_lo, JRCFG_IMSK);
	128	}
	129
8e8ec596 KP	130	/**
	131	* caam_jr_enqueue() - Enqueue a job descriptor head. Returns 0 if OK,
	132	* -EBUSY if the queue is full, -EIO if it cannot map the caller's
	133	* descriptor.
	134	* @dev: device of the job ring to be used. This device should have
	135	* been assigned prior by caam_jr_register().
	136	* @desc: points to a job descriptor that execute our request. All
	137	* descriptors (and all referenced data) must be in a DMAable
	138	* region, and all data references must be physical addresses
	139	* accessible to CAAM (i.e. within a PAMU window granted
	140	* to it).
	141	* @cbk: pointer to a callback function to be invoked upon completion
	142	* of this request. This has the form:
	143	* callback(struct device dev, u32 desc, u32 stat, void *arg)
	144	* where:
	145	* @dev: contains the job ring device that processed this
	146	* response.
	147	* @desc: descriptor that initiated the request, same as
	148	* "desc" being argued to caam_jr_enqueue().
	149	* @status: untranslated status received from CAAM. See the
	150	* reference manual for a detailed description of
	151	* error meaning, or see the JRSTA definitions in the
	152	* register header file
	153	* @areq: optional pointer to an argument passed with the
	154	* original request
	155	* @areq: optional pointer to a user argument for use at callback
	156	* time.
	157	**/
	158	int caam_jr_enqueue(struct device dev, u32 desc,
	159	void (cbk)(struct device dev, u32 *desc,
	160	u32 status, void *areq),
	161	void *areq)
	162	{
	163	struct caam_drv_private_jr *jrp = dev_get_drvdata(dev);
	164	struct caam_jrentry_info *head_entry;
8e8ec596 KP	165	int head, tail, desc_size;
	166	dma_addr_t desc_dma;
	167
	168	desc_size = (desc & HDR_JD_LENGTH_MASK) sizeof(u32);
	169	desc_dma = dma_map_single(dev, desc, desc_size, DMA_TO_DEVICE);
	170	if (dma_mapping_error(dev, desc_dma)) {
	171	dev_err(dev, "caam_jr_enqueue(): can't map jobdesc\n");
	172	return -EIO;
	173	}
	174
ce026cb9	175	spin_lock_bh(&jrp->inplock);
8e8ec596 KP	176
	177	head = jrp->head;
	178	tail = ACCESS_ONCE(jrp->tail);
	179
	180	if (!rd_reg32(&jrp->rregs->inpring_avail) \|\|
	181	CIRC_SPACE(head, tail, JOBR_DEPTH) <= 0) {
ce026cb9	182	spin_unlock_bh(&jrp->inplock);
8e8ec596 KP	183	dma_unmap_single(dev, desc_dma, desc_size, DMA_TO_DEVICE);
	184	return -EBUSY;
	185	}
	186
	187	head_entry = &jrp->entinfo[head];
	188	head_entry->desc_addr_virt = desc;
	189	head_entry->desc_size = desc_size;
	190	head_entry->callbk = (void *)cbk;
	191	head_entry->cbkarg = areq;
	192	head_entry->desc_addr_dma = desc_dma;
	193
	194	jrp->inpring[jrp->inp_ring_write_index] = desc_dma;
	195
	196	smp_wmb();
	197
	198	jrp->inp_ring_write_index = (jrp->inp_ring_write_index + 1) &
	199	(JOBR_DEPTH - 1);
	200	jrp->head = (head + 1) & (JOBR_DEPTH - 1);
	201
8e8ec596 KP	202	wr_reg32(&jrp->rregs->inpring_jobadd, 1);
8e8ec596 KP	203
ce026cb9	204	spin_unlock_bh(&jrp->inplock);
8e8ec596 KP	205
	206	return 0;
	207	}
	208	EXPORT_SYMBOL(caam_jr_enqueue);
	209
	210	static int caam_reset_hw_jr(struct device *dev)
	211	{
	212	struct caam_drv_private_jr *jrp = dev_get_drvdata(dev);
	213	unsigned int timeout = 100000;
	214
	215	/*
9620fd95 KP	216	* mask interrupts since we are going to poll
9620fd95 KP	217	* for reset completion status
8e8ec596	218	*/
9620fd95	219	setbits32(&jrp->rregs->rconfig_lo, JRCFG_IMSK);
8e8ec596 KP	220
	221	/* initiate flush (required prior to reset) */
	222	wr_reg32(&jrp->rregs->jrcommand, JRCR_RESET);
	223	while (((rd_reg32(&jrp->rregs->jrintstatus) & JRINT_ERR_HALT_MASK) ==
	224	JRINT_ERR_HALT_INPROGRESS) && --timeout)
	225	cpu_relax();
	226
	227	if ((rd_reg32(&jrp->rregs->jrintstatus) & JRINT_ERR_HALT_MASK) !=
	228	JRINT_ERR_HALT_COMPLETE \|\| timeout == 0) {
	229	dev_err(dev, "failed to flush job ring %d\n", jrp->ridx);
	230	return -EIO;
	231	}
	232
	233	/* initiate reset */
	234	timeout = 100000;
	235	wr_reg32(&jrp->rregs->jrcommand, JRCR_RESET);
	236	while ((rd_reg32(&jrp->rregs->jrcommand) & JRCR_RESET) && --timeout)
	237	cpu_relax();
	238
	239	if (timeout == 0) {
	240	dev_err(dev, "failed to reset job ring %d\n", jrp->ridx);
	241	return -EIO;
	242	}
	243
9620fd95 KP	244	/* unmask interrupts */
9620fd95 KP	245	clrbits32(&jrp->rregs->rconfig_lo, JRCFG_IMSK);
8e8ec596 KP	246
	247	return 0;
	248	}
	249
	250	/*
	251	* Init JobR independent of platform property detection
	252	*/
	253	static int caam_jr_init(struct device *dev)
	254	{
	255	struct caam_drv_private_jr *jrp;
	256	dma_addr_t inpbusaddr, outbusaddr;
	257	int i, error;
	258
	259	jrp = dev_get_drvdata(dev);
	260
a0ca6ca0	261	tasklet_init(&jrp->irqtask, caam_jr_dequeue, (unsigned long)dev);
9620fd95	262
a0ca6ca0	263	/* Connect job ring interrupt handler. */
9620fd95 KP	264	error = request_irq(jrp->irq, caam_jr_interrupt, IRQF_SHARED,
	265	"caam-jobr", dev);
	266	if (error) {
	267	dev_err(dev, "can't connect JobR %d interrupt (%d)\n",
	268	jrp->ridx, jrp->irq);
	269	irq_dispose_mapping(jrp->irq);
	270	jrp->irq = 0;
	271	return -EINVAL;
	272	}
	273
8e8ec596 KP	274	error = caam_reset_hw_jr(dev);
	275	if (error)
	276	return error;
	277
1af8ea86 BB	278	jrp->inpring = dma_alloc_coherent(dev, sizeof(dma_addr_t) * JOBR_DEPTH,
	279	&inpbusaddr, GFP_KERNEL);
	280
	281	jrp->outring = dma_alloc_coherent(dev, sizeof(struct jr_outentry) *
	282	JOBR_DEPTH, &outbusaddr, GFP_KERNEL);
8e8ec596 KP	283
	284	jrp->entinfo = kzalloc(sizeof(struct caam_jrentry_info) * JOBR_DEPTH,
	285	GFP_KERNEL);
	286
	287	if ((jrp->inpring == NULL) \|\| (jrp->outring == NULL) \|\|
	288	(jrp->entinfo == NULL)) {
	289	dev_err(dev, "can't allocate job rings for %d\n",
	290	jrp->ridx);
	291	return -ENOMEM;
	292	}
	293
	294	for (i = 0; i < JOBR_DEPTH; i++)
	295	jrp->entinfo[i].desc_addr_dma = !0;
	296
	297	/* Setup rings */
8e8ec596 KP	298	jrp->inp_ring_write_index = 0;
	299	jrp->out_ring_read_index = 0;
	300	jrp->head = 0;
	301	jrp->tail = 0;
	302
	303	wr_reg64(&jrp->rregs->inpring_base, inpbusaddr);
	304	wr_reg64(&jrp->rregs->outring_base, outbusaddr);
	305	wr_reg32(&jrp->rregs->inpring_size, JOBR_DEPTH);
	306	wr_reg32(&jrp->rregs->outring_size, JOBR_DEPTH);
	307
	308	jrp->ringsize = JOBR_DEPTH;
	309
	310	spin_lock_init(&jrp->inplock);
	311	spin_lock_init(&jrp->outlock);
	312
	313	/* Select interrupt coalescing parameters */
	314	setbits32(&jrp->rregs->rconfig_lo, JOBR_INTC \|
	315	(JOBR_INTC_COUNT_THLD << JRCFG_ICDCT_SHIFT) \|
	316	(JOBR_INTC_TIME_THLD << JRCFG_ICTT_SHIFT));
	317
8e8ec596 KP	318	return 0;
	319	}
	320
	321	/*
	322	* Shutdown JobR independent of platform property code
	323	*/
	324	int caam_jr_shutdown(struct device *dev)
	325	{
	326	struct caam_drv_private_jr *jrp = dev_get_drvdata(dev);
	327	dma_addr_t inpbusaddr, outbusaddr;
a0ca6ca0	328	int ret;
8e8ec596 KP	329
	330	ret = caam_reset_hw_jr(dev);
	331
a0ca6ca0	332	tasklet_kill(&jrp->irqtask);
8e8ec596 KP	333
	334	/* Release interrupt */
	335	free_irq(jrp->irq, dev);
	336
	337	/* Free rings */
	338	inpbusaddr = rd_reg64(&jrp->rregs->inpring_base);
	339	outbusaddr = rd_reg64(&jrp->rregs->outring_base);
1af8ea86 BB	340	dma_free_coherent(dev, sizeof(dma_addr_t) * JOBR_DEPTH,
	341	jrp->inpring, inpbusaddr);
	342	dma_free_coherent(dev, sizeof(struct jr_outentry) * JOBR_DEPTH,
	343	jrp->outring, outbusaddr);
8e8ec596	344	kfree(jrp->entinfo);
3862de1f	345	of_device_unregister(jrp->jr_pdev);
8e8ec596 KP	346
	347	return ret;
	348	}
	349
	350	/*
	351	* Probe routine for each detected JobR subsystem. It assumes that
	352	* property detection was picked up externally.
	353	*/
	354	int caam_jr_probe(struct platform_device pdev, struct device_node np,
	355	int ring)
	356	{
	357	struct device ctrldev, jrdev;
	358	struct platform_device *jr_pdev;
	359	struct caam_drv_private *ctrlpriv;
	360	struct caam_drv_private_jr *jrpriv;
	361	u32 *jroffset;
	362	int error;
	363
	364	ctrldev = &pdev->dev;
	365	ctrlpriv = dev_get_drvdata(ctrldev);
	366
	367	jrpriv = kmalloc(sizeof(struct caam_drv_private_jr),
	368	GFP_KERNEL);
	369	if (jrpriv == NULL) {
	370	dev_err(ctrldev, "can't alloc private mem for job ring %d\n",
	371	ring);
	372	return -ENOMEM;
	373	}
	374	jrpriv->parentdev = ctrldev; /* point back to parent */
	375	jrpriv->ridx = ring; /* save ring identity relative to detection */
	376
	377	/*
	378	* Derive a pointer to the detected JobRs regs
	379	* Driver has already iomapped the entire space, we just
	380	* need to add in the offset to this JobR. Don't know if I
	381	* like this long-term, but it'll run
	382	*/
	383	jroffset = (u32 *)of_get_property(np, "reg", NULL);
	384	jrpriv->rregs = (struct caam_job_ring __iomem )((void )ctrlpriv->ctrl
	385	+ *jroffset);
	386
	387	/* Build a local dev for each detected queue */
	388	jr_pdev = of_platform_device_create(np, NULL, ctrldev);
	389	if (jr_pdev == NULL) {
	390	kfree(jrpriv);
	391	return -EINVAL;
	392	}
3862de1f VG	393
3862de1f VG	394	jrpriv->jr_pdev = jr_pdev;
8e8ec596 KP	395	jrdev = &jr_pdev->dev;
	396	dev_set_drvdata(jrdev, jrpriv);
	397	ctrlpriv->jrdev[ring] = jrdev;
	398
e13af18a KP	399	if (sizeof(dma_addr_t) == sizeof(u64))
	400	if (of_device_is_compatible(np, "fsl,sec-v5.0-job-ring"))
	401	dma_set_mask(jrdev, DMA_BIT_MASK(40));
	402	else
	403	dma_set_mask(jrdev, DMA_BIT_MASK(36));
	404	else
	405	dma_set_mask(jrdev, DMA_BIT_MASK(32));
	406
8e8ec596 KP	407	/* Identify the interrupt */
	408	jrpriv->irq = of_irq_to_resource(np, 0, NULL);
	409
	410	/* Now do the platform independent part */
	411	error = caam_jr_init(jrdev); /* now turn on hardware */
	412	if (error) {
3862de1f	413	of_device_unregister(jr_pdev);
8e8ec596 KP	414	kfree(jrpriv);
	415	return error;
	416	}
	417
	418	return error;
	419	}