![Greg Kroah-Hartman](/assets/img/avatar_default.png)
CONFIG_HOTPLUG is going away as an option. As a result, the __dev* markings need to be removed. This change removes the use of __devinit, __devexit_p, __devinitdata, and __devexit from these drivers. Based on patches originally written by Bill Pemberton, but redone by me in order to handle some of the coding style issues better, by hand. Cc: Bill Pemberton <wfp5p@virginia.edu> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: "David S. Miller" <davem@davemloft.net> Cc: Kent Yoder <key@linux.vnet.ibm.com> Cc: Jamie Iles <jamie@jamieiles.com> Cc: Kim Phillips <kim.phillips@freescale.com> Cc: Shengzhou Liu <Shengzhou.Liu@freescale.com> Cc: Alex Porosanu <alexandru.porosanu@freescale.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
431 lines
11 KiB
C
431 lines
11 KiB
C
/*
|
|
* CAAM control-plane driver backend
|
|
* Controller-level driver, kernel property detection, initialization
|
|
*
|
|
* Copyright 2008-2012 Freescale Semiconductor, Inc.
|
|
*/
|
|
|
|
#include "compat.h"
|
|
#include "regs.h"
|
|
#include "intern.h"
|
|
#include "jr.h"
|
|
#include "desc_constr.h"
|
|
#include "error.h"
|
|
#include "ctrl.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;
|
|
}
|
|
|
|
/*
|
|
* Descriptor to instantiate RNG State Handle 0 in normal mode and
|
|
* load the JDKEK, TDKEK and TDSK registers
|
|
*/
|
|
static void build_instantiation_desc(u32 *desc)
|
|
{
|
|
u32 *jump_cmd;
|
|
|
|
init_job_desc(desc, 0);
|
|
|
|
/* INIT RNG in non-test mode */
|
|
append_operation(desc, OP_TYPE_CLASS1_ALG | OP_ALG_ALGSEL_RNG |
|
|
OP_ALG_AS_INIT);
|
|
|
|
/* wait for done */
|
|
jump_cmd = append_jump(desc, JUMP_CLASS_CLASS1);
|
|
set_jump_tgt_here(desc, jump_cmd);
|
|
|
|
/*
|
|
* load 1 to clear written reg:
|
|
* resets the done interrrupt and returns the RNG to idle.
|
|
*/
|
|
append_load_imm_u32(desc, 1, LDST_SRCDST_WORD_CLRW);
|
|
|
|
/* generate secure keys (non-test) */
|
|
append_operation(desc, OP_TYPE_CLASS1_ALG | OP_ALG_ALGSEL_RNG |
|
|
OP_ALG_RNG4_SK);
|
|
}
|
|
|
|
struct instantiate_result {
|
|
struct completion completion;
|
|
int err;
|
|
};
|
|
|
|
static void rng4_init_done(struct device *dev, u32 *desc, u32 err,
|
|
void *context)
|
|
{
|
|
struct instantiate_result *instantiation = context;
|
|
|
|
if (err) {
|
|
char tmp[CAAM_ERROR_STR_MAX];
|
|
|
|
dev_err(dev, "%08x: %s\n", err, caam_jr_strstatus(tmp, err));
|
|
}
|
|
|
|
instantiation->err = err;
|
|
complete(&instantiation->completion);
|
|
}
|
|
|
|
static int instantiate_rng(struct device *jrdev)
|
|
{
|
|
struct instantiate_result instantiation;
|
|
|
|
dma_addr_t desc_dma;
|
|
u32 *desc;
|
|
int ret;
|
|
|
|
desc = kmalloc(CAAM_CMD_SZ * 6, GFP_KERNEL | GFP_DMA);
|
|
if (!desc) {
|
|
dev_err(jrdev, "cannot allocate RNG init descriptor memory\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
build_instantiation_desc(desc);
|
|
desc_dma = dma_map_single(jrdev, desc, desc_bytes(desc), DMA_TO_DEVICE);
|
|
init_completion(&instantiation.completion);
|
|
ret = caam_jr_enqueue(jrdev, desc, rng4_init_done, &instantiation);
|
|
if (!ret) {
|
|
wait_for_completion_interruptible(&instantiation.completion);
|
|
ret = instantiation.err;
|
|
if (ret)
|
|
dev_err(jrdev, "unable to instantiate RNG\n");
|
|
}
|
|
|
|
dma_unmap_single(jrdev, desc_dma, desc_bytes(desc), DMA_TO_DEVICE);
|
|
|
|
kfree(desc);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* By default, the TRNG runs for 200 clocks per sample;
|
|
* 1600 clocks per sample generates better entropy.
|
|
*/
|
|
static void kick_trng(struct platform_device *pdev)
|
|
{
|
|
struct device *ctrldev = &pdev->dev;
|
|
struct caam_drv_private *ctrlpriv = dev_get_drvdata(ctrldev);
|
|
struct caam_full __iomem *topregs;
|
|
struct rng4tst __iomem *r4tst;
|
|
u32 val;
|
|
|
|
topregs = (struct caam_full __iomem *)ctrlpriv->ctrl;
|
|
r4tst = &topregs->ctrl.r4tst[0];
|
|
|
|
/* put RNG4 into program mode */
|
|
setbits32(&r4tst->rtmctl, RTMCTL_PRGM);
|
|
/* 1600 clocks per sample */
|
|
val = rd_reg32(&r4tst->rtsdctl);
|
|
val = (val & ~RTSDCTL_ENT_DLY_MASK) | (1600 << RTSDCTL_ENT_DLY_SHIFT);
|
|
wr_reg32(&r4tst->rtsdctl, val);
|
|
/* min. freq. count */
|
|
wr_reg32(&r4tst->rtfrqmin, 400);
|
|
/* max. freq. count */
|
|
wr_reg32(&r4tst->rtfrqmax, 6400);
|
|
/* put RNG4 into run mode */
|
|
clrbits32(&r4tst->rtmctl, RTMCTL_PRGM);
|
|
}
|
|
|
|
/**
|
|
* caam_get_era() - Return the ERA of the SEC on SoC, based
|
|
* on the SEC_VID register.
|
|
* Returns the ERA number (1..4) or -ENOTSUPP if the ERA is unknown.
|
|
* @caam_id - the value of the SEC_VID register
|
|
**/
|
|
int caam_get_era(u64 caam_id)
|
|
{
|
|
struct sec_vid *sec_vid = (struct sec_vid *)&caam_id;
|
|
static const struct {
|
|
u16 ip_id;
|
|
u8 maj_rev;
|
|
u8 era;
|
|
} caam_eras[] = {
|
|
{0x0A10, 1, 1},
|
|
{0x0A10, 2, 2},
|
|
{0x0A12, 1, 3},
|
|
{0x0A14, 1, 3},
|
|
{0x0A14, 2, 4},
|
|
{0x0A16, 1, 4},
|
|
{0x0A11, 1, 4}
|
|
};
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(caam_eras); i++)
|
|
if (caam_eras[i].ip_id == sec_vid->ip_id &&
|
|
caam_eras[i].maj_rev == sec_vid->maj_rev)
|
|
return caam_eras[i].era;
|
|
|
|
return -ENOTSUPP;
|
|
}
|
|
EXPORT_SYMBOL(caam_get_era);
|
|
|
|
/* Probe routine for CAAM top (controller) level */
|
|
static int caam_probe(struct platform_device *pdev)
|
|
{
|
|
int ret, ring, rspec;
|
|
u64 caam_id;
|
|
struct device *dev;
|
|
struct device_node *nprop, *np;
|
|
struct caam_ctrl __iomem *ctrl;
|
|
struct caam_full __iomem *topregs;
|
|
struct caam_drv_private *ctrlpriv;
|
|
#ifdef CONFIG_DEBUG_FS
|
|
struct caam_perfmon *perfmon;
|
|
#endif
|
|
|
|
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,
|
|
* long 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))
|
|
if (of_device_is_compatible(nprop, "fsl,sec-v5.0"))
|
|
dma_set_mask(dev, DMA_BIT_MASK(40));
|
|
else
|
|
dma_set_mask(dev, DMA_BIT_MASK(36));
|
|
else
|
|
dma_set_mask(dev, DMA_BIT_MASK(32));
|
|
|
|
/*
|
|
* 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++;
|
|
if (!rspec) {
|
|
/* for backward compatible with device trees */
|
|
for_each_compatible_node(np, NULL, "fsl,sec4.0-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++;
|
|
}
|
|
if (!ring) {
|
|
for_each_compatible_node(np, NULL, "fsl,sec4.0-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;
|
|
}
|
|
|
|
/*
|
|
* RNG4 based SECs (v5+) need special initialization prior
|
|
* to executing any descriptors
|
|
*/
|
|
if (of_device_is_compatible(nprop, "fsl,sec-v5.0")) {
|
|
kick_trng(pdev);
|
|
ret = instantiate_rng(ctrlpriv->jrdev[0]);
|
|
if (ret) {
|
|
caam_remove(pdev);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
/* NOTE: RTIC detection ought to go here, around Si time */
|
|
|
|
/* Initialize queue allocator lock */
|
|
spin_lock_init(&ctrlpriv->jr_alloc_lock);
|
|
|
|
caam_id = rd_reg64(&topregs->ctrl.perfmon.caam_id);
|
|
|
|
/* Report "alive" for developer to see */
|
|
dev_info(dev, "device ID = 0x%016llx (Era %d)\n", caam_id,
|
|
caam_get_era(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_IRUSR | S_IRGRP | S_IROTH,
|
|
ctrlpriv->ctl, &perfmon->req_dequeued);
|
|
ctrlpriv->ctl_ob_enc_req =
|
|
debugfs_create_u64("ob_rq_encrypted",
|
|
S_IRUSR | S_IRGRP | S_IROTH,
|
|
ctrlpriv->ctl, &perfmon->ob_enc_req);
|
|
ctrlpriv->ctl_ib_dec_req =
|
|
debugfs_create_u64("ib_rq_decrypted",
|
|
S_IRUSR | S_IRGRP | S_IROTH,
|
|
ctrlpriv->ctl, &perfmon->ib_dec_req);
|
|
ctrlpriv->ctl_ob_enc_bytes =
|
|
debugfs_create_u64("ob_bytes_encrypted",
|
|
S_IRUSR | S_IRGRP | S_IROTH,
|
|
ctrlpriv->ctl, &perfmon->ob_enc_bytes);
|
|
ctrlpriv->ctl_ob_prot_bytes =
|
|
debugfs_create_u64("ob_bytes_protected",
|
|
S_IRUSR | S_IRGRP | S_IROTH,
|
|
ctrlpriv->ctl, &perfmon->ob_prot_bytes);
|
|
ctrlpriv->ctl_ib_dec_bytes =
|
|
debugfs_create_u64("ib_bytes_decrypted",
|
|
S_IRUSR | S_IRGRP | S_IROTH,
|
|
ctrlpriv->ctl, &perfmon->ib_dec_bytes);
|
|
ctrlpriv->ctl_ib_valid_bytes =
|
|
debugfs_create_u64("ib_bytes_validated",
|
|
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_IRUSR | S_IRGRP | S_IROTH,
|
|
ctrlpriv->ctl, &perfmon->faultaddr);
|
|
ctrlpriv->ctl_faultdetail =
|
|
debugfs_create_u32("fault_detail",
|
|
S_IRUSR | S_IRGRP | S_IROTH,
|
|
ctrlpriv->ctl, &perfmon->faultdetail);
|
|
ctrlpriv->ctl_faultstatus =
|
|
debugfs_create_u32("fault_status",
|
|
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_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_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_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",
|
|
},
|
|
{
|
|
.compatible = "fsl,sec4.0",
|
|
},
|
|
{},
|
|
};
|
|
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 = caam_remove,
|
|
};
|
|
|
|
module_platform_driver(caam_driver);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("FSL CAAM request backend");
|
|
MODULE_AUTHOR("Freescale Semiconductor - NMG/STC");
|