From: Steve Cornelius Date: Wed, 18 Apr 2012 21:38:50 +0000 (-0700) Subject: ENGR00180943-12: Extend to include support for ARM targets on iMX6 platforms X-Git-Tag: v3.0.35-fsl~1115 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=c4c7780ae2719343c41993abdbfabbe7638fc50b;p=karo-tx-linux.git ENGR00180943-12: Extend to include support for ARM targets on iMX6 platforms Extend to include support for ARM targets on iMX6 platforms, including: - platform property detection when OF device properties unavailable - ring entry direction clarification for DMA API access - cache coherence for rings Signed-off-by: Steve Cornelius --- diff --git a/drivers/crypto/caam/jr.c b/drivers/crypto/caam/jr.c index 340fa322c0f0..280aaaa3d4d4 100644 --- a/drivers/crypto/caam/jr.c +++ b/drivers/crypto/caam/jr.c @@ -2,7 +2,7 @@ * CAAM/SEC 4.x transport/backend driver * JobR backend functionality * - * Copyright 2008-2011 Freescale Semiconductor, Inc. + * Copyright 2008-2012 Freescale Semiconductor, Inc. */ #include "compat.h" @@ -57,9 +57,15 @@ static void caam_jr_dequeue(unsigned long 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; + dma_addr_t outbusaddr; void *userarg; unsigned long flags; + outbusaddr = rd_reg64(&jrp->rregs->outring_base); + dma_sync_single_for_cpu(dev, outbusaddr, + sizeof(struct jr_outentry) * JOBR_DEPTH, + DMA_FROM_DEVICE); + spin_lock_irqsave(&jrp->outlock, flags); head = ACCESS_ONCE(jrp->head); @@ -73,7 +79,6 @@ static void caam_jr_dequeue(unsigned long devarg) 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 */ @@ -240,7 +245,7 @@ int caam_jr_enqueue(struct device *dev, u32 *desc, struct caam_jrentry_info *head_entry; unsigned long flags; int head, tail, desc_size; - dma_addr_t desc_dma; + dma_addr_t desc_dma, inpbusaddr; desc_size = (*desc & HDR_JD_LENGTH_MASK) * sizeof(u32); desc_dma = dma_map_single(dev, desc, desc_size, DMA_TO_DEVICE); @@ -249,6 +254,12 @@ int caam_jr_enqueue(struct device *dev, u32 *desc, return -EIO; } + dma_sync_single_for_device(dev, desc_dma, desc_size, DMA_TO_DEVICE); + + inpbusaddr = rd_reg64(&jrp->rregs->inpring_base); + dma_sync_single_for_device(dev, inpbusaddr, + sizeof(dma_addr_t) * JOBR_DEPTH, + DMA_TO_DEVICE); spin_lock_irqsave(&jrp->inplock, flags); head = jrp->head; @@ -270,6 +281,10 @@ int caam_jr_enqueue(struct device *dev, u32 *desc, jrp->inpring[jrp->inp_ring_write_index] = desc_dma; + dma_sync_single_for_device(dev, inpbusaddr, + sizeof(dma_addr_t) * JOBR_DEPTH, + DMA_TO_DEVICE); + smp_wmb(); jrp->inp_ring_write_index = (jrp->inp_ring_write_index + 1) & @@ -343,7 +358,7 @@ static int caam_jr_init(struct device *dev) (unsigned long)dev); error = request_irq(jrp->irq, caam_jr_interrupt, IRQF_SHARED, - "caam-jobr", dev); + "caam-jr", dev); if (error) { dev_err(dev, "can't connect JobR %d interrupt (%d)\n", jrp->ridx, jrp->irq); @@ -377,7 +392,7 @@ static int caam_jr_init(struct device *dev) /* Setup rings */ inpbusaddr = dma_map_single(dev, jrp->inpring, sizeof(u32 *) * JOBR_DEPTH, - DMA_BIDIRECTIONAL); + DMA_TO_DEVICE); if (dma_mapping_error(dev, inpbusaddr)) { dev_err(dev, "caam_jr_init(): can't map input ring\n"); kfree(jrp->inpring); @@ -388,12 +403,12 @@ static int caam_jr_init(struct device *dev) outbusaddr = dma_map_single(dev, jrp->outring, sizeof(struct jr_outentry) * JOBR_DEPTH, - DMA_BIDIRECTIONAL); + DMA_FROM_DEVICE); if (dma_mapping_error(dev, outbusaddr)) { dev_err(dev, "caam_jr_init(): can't map output ring\n"); dma_unmap_single(dev, inpbusaddr, sizeof(u32 *) * JOBR_DEPTH, - DMA_BIDIRECTIONAL); + DMA_TO_DEVICE); kfree(jrp->inpring); kfree(jrp->outring); kfree(jrp->entinfo); @@ -446,11 +461,9 @@ int caam_jr_shutdown(struct device *dev) outbusaddr = rd_reg64(&jrp->rregs->outring_base); dma_unmap_single(dev, outbusaddr, sizeof(struct jr_outentry) * JOBR_DEPTH, - DMA_BIDIRECTIONAL); + DMA_FROM_DEVICE); dma_unmap_single(dev, inpbusaddr, sizeof(u32 *) * JOBR_DEPTH, - DMA_BIDIRECTIONAL); - kfree(jrp->outring); - kfree(jrp->inpring); + DMA_TO_DEVICE); kfree(jrp->entinfo); return ret; @@ -467,8 +480,12 @@ int caam_jr_probe(struct platform_device *pdev, struct device_node *np, struct platform_device *jr_pdev; struct caam_drv_private *ctrlpriv; struct caam_drv_private_jr *jrpriv; - u32 *jroffset; int error; + /* FIXME: perhaps "struct resource *" for OF and non? */ + u32 *jroffset, *irqres; +#ifndef CONFIG_OF + char *rname, rinst; +#endif ctrldev = &pdev->dev; ctrlpriv = dev_get_drvdata(ctrldev); @@ -489,12 +506,35 @@ int caam_jr_probe(struct platform_device *pdev, struct device_node *np, * need to add in the offset to this JobR. Don't know if I * like this long-term, but it'll run */ +#ifdef CONFIG_OF jroffset = (u32 *)of_get_property(np, "reg", NULL); +#else + rname = kmalloc(strlen(JR_MEMRES_NAME_ROOT) + 1, 0); + if (rname == NULL) { + dev_err(ctrldev, "can't alloc resource detection buffer %d\n", + ring); + kfree(jrpriv); + return -ENOMEM; + } + rname[0] = 0; + rinst = '0' + ring; + strcat(rname, JR_MEMRES_NAME_ROOT); + strncat(rname, &rinst, 1); + jroffset = (u32 *)platform_get_resource_byname(pdev, IORESOURCE_MEM, + rname); + kfree(rname); +#endif jrpriv->rregs = (struct caam_job_ring __iomem *)((void *)ctrlpriv->ctrl + *jroffset); /* Build a local dev for each detected queue */ +#ifdef CONFIG_OF jr_pdev = of_platform_device_create(np, NULL, ctrldev); +#else + jr_pdev = platform_device_register_data(ctrldev, "caam_jr", ring, + jrpriv, + sizeof(struct caam_drv_private_jr)); +#endif if (jr_pdev == NULL) { kfree(jrpriv); return -EINVAL; @@ -504,7 +544,24 @@ int caam_jr_probe(struct platform_device *pdev, struct device_node *np, ctrlpriv->jrdev[ring] = jrdev; /* Identify the interrupt */ +#ifdef CONFIG_OF jrpriv->irq = of_irq_to_resource(np, 0, NULL); +#else + rname = kmalloc(strlen(JR_IRQRES_NAME_ROOT) + 1, 0); + if (rname == NULL) { + dev_err(ctrldev, "can't alloc resource detection buffer %d\n", + ring); + kfree(jrpriv); + return -ENOMEM; + } + rname[0] = 0; + strcat(rname, JR_IRQRES_NAME_ROOT); + strncat(rname, &rinst, 1); + irqres = (u32 *)platform_get_resource_byname(pdev, IORESOURCE_IRQ, + rname); + jrpriv->irq = *irqres; + kfree(rname); +#endif /* Now do the platform independent part */ error = caam_jr_init(jrdev); /* now turn on hardware */