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/*
* CAAM control-plane driver backend
* Controller-level driver, kernel property detection, initialization
*
* Copyright 2008-2011 Freescale Semiconductor, Inc.
*/
#include "compat.h"
#include "regs.h"
#include "intern.h"
#include "jr.h"
static int caam_remove(struct platform_device *pdev)
{
struct device *ctrldev;
struct caam_drv_private *ctrlpriv;
struct caam_drv_private_jr *jrpriv;
struct caam_full __iomem *topregs;
int ring, ret = 0;
ctrldev = &pdev->dev;
ctrlpriv = dev_get_drvdata(ctrldev);
topregs = (struct caam_full __iomem *)ctrlpriv->ctrl;
/* shut down JobRs */
for (ring = 0; ring < ctrlpriv->total_jobrs; ring++) {
ret |= caam_jr_shutdown(ctrlpriv->jrdev[ring]);
jrpriv = dev_get_drvdata(ctrlpriv->jrdev[ring]);
irq_dispose_mapping(jrpriv->irq);
}
/* Shut down debug views */
#ifdef CONFIG_DEBUG_FS
debugfs_remove_recursive(ctrlpriv->dfs_root);
#endif
/* Unmap controller region */
iounmap(&topregs->ctrl);
kfree(ctrlpriv->jrdev);
kfree(ctrlpriv);
return ret;
}
/* Probe routine for CAAM top (controller) level */
static int caam_probe(struct platform_device *pdev)
{
int d, ring, rspec;
struct device *dev;
struct device_node *nprop, *np;
struct caam_ctrl __iomem *ctrl;
struct caam_full __iomem *topregs;
struct caam_drv_private *ctrlpriv;
struct caam_perfmon *perfmon;
struct caam_deco **deco;
u32 deconum;
ctrlpriv = kzalloc(sizeof(struct caam_drv_private), GFP_KERNEL);
if (!ctrlpriv)
return -ENOMEM;
dev = &pdev->dev;
dev_set_drvdata(dev, ctrlpriv);
ctrlpriv->pdev = pdev;
nprop = pdev->dev.of_node;
/* Get configuration properties from device tree */
/* First, get register page */
ctrl = of_iomap(nprop, 0);
if (ctrl == NULL) {
dev_err(dev, "caam: of_iomap() failed\n");
return -ENOMEM;
}
ctrlpriv->ctrl = (struct caam_ctrl __force *)ctrl;
/* topregs used to derive pointers to CAAM sub-blocks only */
topregs = (struct caam_full __iomem *)ctrl;
/* Get the IRQ of the controller (for security violations only) */
ctrlpriv->secvio_irq = of_irq_to_resource(nprop, 0, NULL);
/*
* Enable DECO watchdogs and, if this is a PHYS_ADDR_T_64BIT kernel,
* 36-bit pointers in master configuration register
*/
setbits32(&topregs->ctrl.mcr, MCFGR_WDENABLE |
(sizeof(dma_addr_t) == sizeof(u64) ? MCFGR_LONG_PTR : 0));
if (sizeof(dma_addr_t) == sizeof(u64))
dma_set_mask(dev, DMA_BIT_MASK(36));
/* Find out how many DECOs are present */
deconum = (rd_reg64(&topregs->ctrl.perfmon.cha_num) &
CHA_NUM_DECONUM_MASK) >> CHA_NUM_DECONUM_SHIFT;
ctrlpriv->deco = kmalloc(deconum * sizeof(struct caam_deco *),
GFP_KERNEL);
deco = (struct caam_deco __force **)&topregs->deco;
for (d = 0; d < deconum; d++)
ctrlpriv->deco[d] = deco[d];
/*
* Detect and enable JobRs
* First, find out how many ring spec'ed, allocate references
* for all, then go probe each one.
*/
rspec = 0;
for_each_compatible_node(np, NULL, "fsl,sec-v4.0-job-ring")
rspec++;
ctrlpriv->jrdev = kzalloc(sizeof(struct device *) * rspec, GFP_KERNEL);
if (ctrlpriv->jrdev == NULL) {
iounmap(&topregs->ctrl);
return -ENOMEM;
}
ring = 0;
ctrlpriv->total_jobrs = 0;
for_each_compatible_node(np, NULL, "fsl,sec-v4.0-job-ring") {
caam_jr_probe(pdev, np, ring);
ctrlpriv->total_jobrs++;
ring++;
}
/* Check to see if QI present. If so, enable */
ctrlpriv->qi_present = !!(rd_reg64(&topregs->ctrl.perfmon.comp_parms) &
CTPR_QI_MASK);
if (ctrlpriv->qi_present) {
ctrlpriv->qi = (struct caam_queue_if __force *)&topregs->qi;
/* This is all that's required to physically enable QI */
wr_reg32(&topregs->qi.qi_control_lo, QICTL_DQEN);
}
/* If no QI and no rings specified, quit and go home */
if ((!ctrlpriv->qi_present) && (!ctrlpriv->total_jobrs)) {
dev_err(dev, "no queues configured, terminating\n");
caam_remove(pdev);
return -ENOMEM;
}
/* NOTE: RTIC detection ought to go here, around Si time */
/* Initialize queue allocator lock */
spin_lock_init(&ctrlpriv->jr_alloc_lock);
/* Report "alive" for developer to see */
dev_info(dev, "device ID = 0x%016llx\n",
rd_reg64(&topregs->ctrl.perfmon.caam_id));
dev_info(dev, "job rings = %d, qi = %d\n",
ctrlpriv->total_jobrs, ctrlpriv->qi_present);
#ifdef CONFIG_DEBUG_FS
/*
* FIXME: needs better naming distinction, as some amalgamation of
* "caam" and nprop->full_name. The OF name isn't distinctive,
* but does separate instances
*/
perfmon = (struct caam_perfmon __force *)&ctrl->perfmon;
ctrlpriv->dfs_root = debugfs_create_dir("caam", NULL);
ctrlpriv->ctl = debugfs_create_dir("ctl", ctrlpriv->dfs_root);
/* Controller-level - performance monitor counters */
ctrlpriv->ctl_rq_dequeued =
debugfs_create_u64("rq_dequeued",
S_IFCHR | S_IRUSR | S_IRGRP | S_IROTH,
ctrlpriv->ctl, &perfmon->req_dequeued);
ctrlpriv->ctl_ob_enc_req =
debugfs_create_u64("ob_rq_encrypted",
S_IFCHR | S_IRUSR | S_IRGRP | S_IROTH,
ctrlpriv->ctl, &perfmon->ob_enc_req);
ctrlpriv->ctl_ib_dec_req =
debugfs_create_u64("ib_rq_decrypted",
S_IFCHR | S_IRUSR | S_IRGRP | S_IROTH,
ctrlpriv->ctl, &perfmon->ib_dec_req);
ctrlpriv->ctl_ob_enc_bytes =
debugfs_create_u64("ob_bytes_encrypted",
S_IFCHR | S_IRUSR | S_IRGRP | S_IROTH,
ctrlpriv->ctl, &perfmon->ob_enc_bytes);
ctrlpriv->ctl_ob_prot_bytes =
debugfs_create_u64("ob_bytes_protected",
S_IFCHR | S_IRUSR | S_IRGRP | S_IROTH,
ctrlpriv->ctl, &perfmon->ob_prot_bytes);
ctrlpriv->ctl_ib_dec_bytes =
debugfs_create_u64("ib_bytes_decrypted",
S_IFCHR | S_IRUSR | S_IRGRP | S_IROTH,
ctrlpriv->ctl, &perfmon->ib_dec_bytes);
ctrlpriv->ctl_ib_valid_bytes =
debugfs_create_u64("ib_bytes_validated",
S_IFCHR | S_IRUSR | S_IRGRP | S_IROTH,
ctrlpriv->ctl, &perfmon->ib_valid_bytes);
/* Controller level - global status values */
ctrlpriv->ctl_faultaddr =
debugfs_create_u64("fault_addr",
S_IFCHR | S_IRUSR | S_IRGRP | S_IROTH,
ctrlpriv->ctl, &perfmon->faultaddr);
ctrlpriv->ctl_faultdetail =
debugfs_create_u32("fault_detail",
S_IFCHR | S_IRUSR | S_IRGRP | S_IROTH,
ctrlpriv->ctl, &perfmon->faultdetail);
ctrlpriv->ctl_faultstatus =
debugfs_create_u32("fault_status",
S_IFCHR | S_IRUSR | S_IRGRP | S_IROTH,
ctrlpriv->ctl, &perfmon->status);
/* Internal covering keys (useful in non-secure mode only) */
ctrlpriv->ctl_kek_wrap.data = &ctrlpriv->ctrl->kek[0];
ctrlpriv->ctl_kek_wrap.size = KEK_KEY_SIZE * sizeof(u32);
ctrlpriv->ctl_kek = debugfs_create_blob("kek",
S_IFCHR | S_IRUSR |
S_IRGRP | S_IROTH,
ctrlpriv->ctl,
&ctrlpriv->ctl_kek_wrap);
ctrlpriv->ctl_tkek_wrap.data = &ctrlpriv->ctrl->tkek[0];
ctrlpriv->ctl_tkek_wrap.size = KEK_KEY_SIZE * sizeof(u32);
ctrlpriv->ctl_tkek = debugfs_create_blob("tkek",
S_IFCHR | S_IRUSR |
S_IRGRP | S_IROTH,
ctrlpriv->ctl,
&ctrlpriv->ctl_tkek_wrap);
ctrlpriv->ctl_tdsk_wrap.data = &ctrlpriv->ctrl->tdsk[0];
ctrlpriv->ctl_tdsk_wrap.size = KEK_KEY_SIZE * sizeof(u32);
ctrlpriv->ctl_tdsk = debugfs_create_blob("tdsk",
S_IFCHR | S_IRUSR |
S_IRGRP | S_IROTH,
ctrlpriv->ctl,
&ctrlpriv->ctl_tdsk_wrap);
#endif
return 0;
}
static struct of_device_id caam_match[] = {
{
.compatible = "fsl,sec-v4.0",
},
{},
};
MODULE_DEVICE_TABLE(of, caam_match);
static struct platform_driver caam_driver = {
.driver = {
.name = "caam",
.owner = THIS_MODULE,
.of_match_table = caam_match,
},
.probe = caam_probe,
.remove = __devexit_p(caam_remove),
};
static int __init caam_base_init(void)
{
return platform_driver_register(&caam_driver);
}
static void __exit caam_base_exit(void)
{
return platform_driver_unregister(&caam_driver);
}
module_init(caam_base_init);
module_exit(caam_base_exit);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("FSL CAAM request backend");
MODULE_AUTHOR("Freescale Semiconductor - NMG/STC");
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