// SPDX-License-Identifier: GPL-2.0-only
/*
*
* Copyright ( C ) 2013 Freescale Semiconductor , Inc .
*/
#define pr_fmt(fmt) "fsl-pamu: %s: " fmt, __func__
#include "fsl_pamu.h"
#include <linux/fsl/guts.h>
#include <linux/interrupt.h>
#include <linux/genalloc.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/platform_device.h>
#include <asm /mpc85xx.h>
/* define indexes for each operation mapping scenario */
#define OMI_QMAN 0 x00
#define OMI_FMAN 0 x01
#define OMI_QMAN_PRIV 0 x02
#define OMI_CAAM 0 x03
#define make64(high, low) (((u64)(high) << 32 ) | (low))
struct pamu_isr_data {
void __iomem *pamu_reg_base; /* Base address of PAMU regs */
unsigned int count; /* The number of PAMUs */
};
static struct paace *ppaact;
static struct paace *spaact;
static bool probed; /* Has PAMU been probed? */
/*
* Table for matching compatible strings , for device tree
* guts node , for QorIQ SOCs .
* " fsl , qoriq - device - config - 2 . 0 " corresponds to T4 & B4
* SOCs . For the older SOCs " fsl , qoriq - device - config - 1 . 0 "
* string would be used .
*/
static const struct of_device_id guts_device_ids[] = {
{ .compatible = "fsl,qoriq-device-config-1.0" , },
{ .compatible = "fsl,qoriq-device-config-2.0" , },
{}
};
/*
* Table for matching compatible strings , for device tree
* L3 cache controller node .
* " fsl , t4240 - l3 - cache - controller " corresponds to T4 ,
* " fsl , b4860 - l3 - cache - controller " corresponds to B4 &
* " fsl , p4080 - l3 - cache - controller " corresponds to other ,
* SOCs .
*/
static const struct of_device_id l3_device_ids[] = {
{ .compatible = "fsl,t4240-l3-cache-controller" , },
{ .compatible = "fsl,b4860-l3-cache-controller" , },
{ .compatible = "fsl,p4080-l3-cache-controller" , },
{}
};
/* maximum subwindows permitted per liodn */
static u32 max_subwindow_count;
/**
* pamu_get_ppaace ( ) - Return the primary PACCE
* @ liodn : liodn PAACT index for desired PAACE
*
* Returns the ppace pointer upon success else return
* null .
*/
static struct paace *pamu_get_ppaace(int liodn)
{
if (!ppaact || liodn >= PAACE_NUMBER_ENTRIES) {
pr_debug("PPAACT doesn't exist\n" );
return NULL;
}
return &ppaact[liodn];
}
/**
* pamu_enable_liodn ( ) - Set valid bit of PACCE
* @ liodn : liodn PAACT index for desired PAACE
*
* Returns 0 upon success else error code < 0 returned
*/
int pamu_enable_liodn(int liodn)
{
struct paace *ppaace;
ppaace = pamu_get_ppaace(liodn);
if (!ppaace) {
pr_debug("Invalid primary paace entry\n" );
return -ENOENT;
}
if (!get_bf(ppaace->addr_bitfields, PPAACE_AF_WSE)) {
pr_debug("liodn %d not configured\n" , liodn);
return -EINVAL;
}
/* Ensure that all other stores to the ppaace complete first */
mb();
set_bf(ppaace->addr_bitfields, PAACE_AF_V, PAACE_V_VALID);
mb();
return 0 ;
}
/**
* pamu_disable_liodn ( ) - Clears valid bit of PACCE
* @ liodn : liodn PAACT index for desired PAACE
*
* Returns 0 upon success else error code < 0 returned
*/
int pamu_disable_liodn(int liodn)
{
struct paace *ppaace;
ppaace = pamu_get_ppaace(liodn);
if (!ppaace) {
pr_debug("Invalid primary paace entry\n" );
return -ENOENT;
}
set_bf(ppaace->addr_bitfields, PAACE_AF_V, PAACE_V_INVALID);
mb();
return 0 ;
}
/* Derive the window size encoding for a particular PAACE entry */
static unsigned int map_addrspace_size_to_wse(phys_addr_t addrspace_size)
{
/* Bug if not a power of 2 */
BUG_ON(addrspace_size & (addrspace_size - 1 ));
/* window size is 2^(WSE+1) bytes */
return fls64(addrspace_size) - 2 ;
}
/*
* Set the PAACE type as primary and set the coherency required domain
* attribute
*/
static void pamu_init_ppaace(struct paace *ppaace)
{
set_bf(ppaace->addr_bitfields, PAACE_AF_PT, PAACE_PT_PRIMARY);
set_bf(ppaace->domain_attr.to_host.coherency_required, PAACE_DA_HOST_CR,
PAACE_M_COHERENCE_REQ);
}
/*
* Function used for updating stash destination for the coressponding
* LIODN .
*/
int pamu_update_paace_stash(int liodn, u32 value)
{
struct paace *paace;
paace = pamu_get_ppaace(liodn);
if (!paace) {
pr_debug("Invalid liodn entry\n" );
return -ENOENT;
}
set_bf(paace->impl_attr, PAACE_IA_CID, value);
mb();
return 0 ;
}
/**
* pamu_config_ppaace ( ) - Sets up PPAACE entry for specified liodn
*
* @ liodn : Logical IO device number
* @ omi : Operation mapping index - - if ~ omi = = 0 then omi not defined
* @ stashid : cache stash id for associated cpu - - if ~ stashid = = 0 then
* stashid not defined
* @ prot : window permissions
*
* Returns 0 upon success else error code < 0 returned
*/
int pamu_config_ppaace(int liodn, u32 omi, u32 stashid, int prot)
{
struct paace *ppaace;
ppaace = pamu_get_ppaace(liodn);
if (!ppaace)
return -ENOENT;
/* window size is 2^(WSE+1) bytes */
set_bf(ppaace->addr_bitfields, PPAACE_AF_WSE,
map_addrspace_size_to_wse(1 ULL << 36 ));
pamu_init_ppaace(ppaace);
ppaace->wbah = 0 ;
set_bf(ppaace->addr_bitfields, PPAACE_AF_WBAL, 0 );
/* set up operation mapping if it's configured */
if (omi < OME_NUMBER_ENTRIES) {
set_bf(ppaace->impl_attr, PAACE_IA_OTM, PAACE_OTM_INDEXED);
ppaace->op_encode.index_ot.omi = omi;
} else if (~omi != 0 ) {
pr_debug("bad operation mapping index: %d\n" , omi);
return -ENODEV;
}
/* configure stash id */
if (~stashid != 0 )
set_bf(ppaace->impl_attr, PAACE_IA_CID, stashid);
set_bf(ppaace->impl_attr, PAACE_IA_ATM, PAACE_ATM_WINDOW_XLATE);
ppaace->twbah = 0 ;
set_bf(ppaace->win_bitfields, PAACE_WIN_TWBAL, 0 );
set_bf(ppaace->addr_bitfields, PAACE_AF_AP, prot);
set_bf(ppaace->impl_attr, PAACE_IA_WCE, 0 );
set_bf(ppaace->addr_bitfields, PPAACE_AF_MW, 0 );
mb();
return 0 ;
}
/**
* get_ome_index ( ) - Returns the index in the operation mapping table
* for device .
* @ omi_index : pointer for storing the index value
* @ dev : target device
*
*/
void get_ome_index(u32 *omi_index, struct device *dev)
{
if (of_device_is_compatible(dev->of_node, "fsl,qman-portal" ))
*omi_index = OMI_QMAN;
if (of_device_is_compatible(dev->of_node, "fsl,qman" ))
*omi_index = OMI_QMAN_PRIV;
}
/**
* get_stash_id - Returns stash destination id corresponding to a
* cache type and vcpu .
* @ stash_dest_hint : L1 , L2 or L3
* @ vcpu : vpcu target for a particular cache type .
*
* Returs stash on success or ~ ( u32 ) 0 on failure .
*
*/
u32 get_stash_id(u32 stash_dest_hint, u32 vcpu)
{
const u32 *prop;
struct device_node *node;
u32 cache_level;
int len, found = 0 ;
int i;
/* Fastpath, exit early if L3/CPC cache is target for stashing */
if (stash_dest_hint == PAMU_ATTR_CACHE_L3) {
node = of_find_matching_node(NULL, l3_device_ids);
if (node) {
prop = of_get_property(node, "cache-stash-id" , NULL);
if (!prop) {
pr_debug("missing cache-stash-id at %pOF\n" ,
node);
of_node_put(node);
return ~(u32)0 ;
}
of_node_put(node);
return be32_to_cpup(prop);
}
return ~(u32)0 ;
}
for_each_of_cpu_node(node) {
prop = of_get_property(node, "reg" , &len);
for (i = 0 ; i < len / sizeof (u32); i++) {
if (be32_to_cpup(&prop[i]) == vcpu) {
found = 1 ;
goto found_cpu_node;
}
}
}
found_cpu_node:
/* find the hwnode that represents the cache */
for (cache_level = PAMU_ATTR_CACHE_L1; (cache_level < PAMU_ATTR_CACHE_L3) && found; cache_level++) {
if (stash_dest_hint == cache_level) {
prop = of_get_property(node, "cache-stash-id" , NULL);
if (!prop) {
pr_debug("missing cache-stash-id at %pOF\n" ,
node);
of_node_put(node);
return ~(u32)0 ;
}
of_node_put(node);
return be32_to_cpup(prop);
}
prop = of_get_property(node, "next-level-cache" , NULL);
if (!prop) {
pr_debug("can't find next-level-cache at %pOF\n" , node);
of_node_put(node);
return ~(u32)0 ; /* can't traverse any further */
}
of_node_put(node);
/* advance to next node in cache hierarchy */
node = of_find_node_by_phandle(*prop);
if (!node) {
pr_debug("Invalid node for cache hierarchy\n" );
return ~(u32)0 ;
}
}
pr_debug("stash dest not found for %d on vcpu %d\n" ,
stash_dest_hint, vcpu);
return ~(u32)0 ;
}
/* Identify if the PAACT table entry belongs to QMAN, BMAN or QMAN Portal */
#define QMAN_PAACE 1
#define QMAN_PORTAL_PAACE 2
#define BMAN_PAACE 3
/*
* Setup operation mapping and stash destinations for QMAN and QMAN portal .
* Memory accesses to QMAN and BMAN private memory need not be coherent , so
* clear the PAACE entry coherency attribute for them .
*/
static void setup_qbman_paace(struct paace *ppaace, int paace_type)
{
switch (paace_type) {
case QMAN_PAACE:
set_bf(ppaace->impl_attr, PAACE_IA_OTM, PAACE_OTM_INDEXED);
ppaace->op_encode.index_ot.omi = OMI_QMAN_PRIV;
/* setup QMAN Private data stashing for the L3 cache */
set_bf(ppaace->impl_attr, PAACE_IA_CID, get_stash_id(PAMU_ATTR_CACHE_L3, 0 ));
set_bf(ppaace->domain_attr.to_host.coherency_required, PAACE_DA_HOST_CR,
0 );
break ;
case QMAN_PORTAL_PAACE:
set_bf(ppaace->impl_attr, PAACE_IA_OTM, PAACE_OTM_INDEXED);
ppaace->op_encode.index_ot.omi = OMI_QMAN;
/* Set DQRR and Frame stashing for the L3 cache */
set_bf(ppaace->impl_attr, PAACE_IA_CID, get_stash_id(PAMU_ATTR_CACHE_L3, 0 ));
break ;
case BMAN_PAACE:
set_bf(ppaace->domain_attr.to_host.coherency_required, PAACE_DA_HOST_CR,
0 );
break ;
}
}
/*
* Setup the operation mapping table for various devices . This is a static
* table where each table index corresponds to a particular device . PAMU uses
* this table to translate device transaction to appropriate corenet
* transaction .
*/
static void setup_omt(struct ome *omt)
{
struct ome *ome;
/* Configure OMI_QMAN */
ome = &omt[OMI_QMAN];
ome->moe[IOE_READ_IDX] = EOE_VALID | EOE_READ;
ome->moe[IOE_EREAD0_IDX] = EOE_VALID | EOE_RSA;
ome->moe[IOE_WRITE_IDX] = EOE_VALID | EOE_WRITE;
ome->moe[IOE_EWRITE0_IDX] = EOE_VALID | EOE_WWSAO;
ome->moe[IOE_DIRECT0_IDX] = EOE_VALID | EOE_LDEC;
ome->moe[IOE_DIRECT1_IDX] = EOE_VALID | EOE_LDECPE;
/* Configure OMI_FMAN */
ome = &omt[OMI_FMAN];
ome->moe[IOE_READ_IDX] = EOE_VALID | EOE_READI;
ome->moe[IOE_WRITE_IDX] = EOE_VALID | EOE_WRITE;
/* Configure OMI_QMAN private */
ome = &omt[OMI_QMAN_PRIV];
ome->moe[IOE_READ_IDX] = EOE_VALID | EOE_READ;
ome->moe[IOE_WRITE_IDX] = EOE_VALID | EOE_WRITE;
ome->moe[IOE_EREAD0_IDX] = EOE_VALID | EOE_RSA;
ome->moe[IOE_EWRITE0_IDX] = EOE_VALID | EOE_WWSA;
/* Configure OMI_CAAM */
ome = &omt[OMI_CAAM];
ome->moe[IOE_READ_IDX] = EOE_VALID | EOE_READI;
ome->moe[IOE_WRITE_IDX] = EOE_VALID | EOE_WRITE;
}
/*
* Get the maximum number of PAACT table entries
* and subwindows supported by PAMU
*/
static void get_pamu_cap_values(unsigned long pamu_reg_base)
{
u32 pc_val;
pc_val = in_be32((u32 *)(pamu_reg_base + PAMU_PC3));
/* Maximum number of subwindows per liodn */
max_subwindow_count = 1 << (1 + PAMU_PC3_MWCE(pc_val));
}
/* Setup PAMU registers pointing to PAACT, SPAACT and OMT */
static int setup_one_pamu(unsigned long pamu_reg_base, unsigned long pamu_reg_size,
phys_addr_t ppaact_phys, phys_addr_t spaact_phys,
phys_addr_t omt_phys)
{
u32 *pc;
struct pamu_mmap_regs *pamu_regs;
pc = (u32 *) (pamu_reg_base + PAMU_PC);
pamu_regs = (struct pamu_mmap_regs *)
(pamu_reg_base + PAMU_MMAP_REGS_BASE);
/* set up pointers to corenet control blocks */
out_be32(&pamu_regs->ppbah, upper_32_bits(ppaact_phys));
out_be32(&pamu_regs->ppbal, lower_32_bits(ppaact_phys));
ppaact_phys = ppaact_phys + PAACT_SIZE;
out_be32(&pamu_regs->pplah, upper_32_bits(ppaact_phys));
out_be32(&pamu_regs->pplal, lower_32_bits(ppaact_phys));
out_be32(&pamu_regs->spbah, upper_32_bits(spaact_phys));
out_be32(&pamu_regs->spbal, lower_32_bits(spaact_phys));
spaact_phys = spaact_phys + SPAACT_SIZE;
out_be32(&pamu_regs->splah, upper_32_bits(spaact_phys));
out_be32(&pamu_regs->splal, lower_32_bits(spaact_phys));
out_be32(&pamu_regs->obah, upper_32_bits(omt_phys));
out_be32(&pamu_regs->obal, lower_32_bits(omt_phys));
omt_phys = omt_phys + OMT_SIZE;
out_be32(&pamu_regs->olah, upper_32_bits(omt_phys));
out_be32(&pamu_regs->olal, lower_32_bits(omt_phys));
/*
* set PAMU enable bit ,
* allow ppaact & omt to be cached
* & enable PAMU access violation interrupts .
*/
out_be32((u32 *)(pamu_reg_base + PAMU_PICS),
PAMU_ACCESS_VIOLATION_ENABLE);
out_be32(pc, PAMU_PC_PE | PAMU_PC_OCE | PAMU_PC_SPCC | PAMU_PC_PPCC);
return 0 ;
}
/* Enable all device LIODNS */
static void setup_liodns(void )
{
int i, len;
struct paace *ppaace;
struct device_node *node = NULL;
const u32 *prop;
for_each_node_with_property(node, "fsl,liodn" ) {
prop = of_get_property(node, "fsl,liodn" , &len);
for (i = 0 ; i < len / sizeof (u32); i++) {
int liodn;
liodn = be32_to_cpup(&prop[i]);
if (liodn >= PAACE_NUMBER_ENTRIES) {
pr_debug("Invalid LIODN value %d\n" , liodn);
continue ;
}
ppaace = pamu_get_ppaace(liodn);
pamu_init_ppaace(ppaace);
/* window size is 2^(WSE+1) bytes */
set_bf(ppaace->addr_bitfields, PPAACE_AF_WSE, 35 );
ppaace->wbah = 0 ;
set_bf(ppaace->addr_bitfields, PPAACE_AF_WBAL, 0 );
set_bf(ppaace->impl_attr, PAACE_IA_ATM,
PAACE_ATM_NO_XLATE);
set_bf(ppaace->addr_bitfields, PAACE_AF_AP,
PAACE_AP_PERMS_ALL);
if (of_device_is_compatible(node, "fsl,qman-portal" ))
setup_qbman_paace(ppaace, QMAN_PORTAL_PAACE);
if (of_device_is_compatible(node, "fsl,qman" ))
setup_qbman_paace(ppaace, QMAN_PAACE);
if (of_device_is_compatible(node, "fsl,bman" ))
setup_qbman_paace(ppaace, BMAN_PAACE);
mb();
pamu_enable_liodn(liodn);
}
}
}
static irqreturn_t pamu_av_isr(int irq, void *arg)
{
struct pamu_isr_data *data = arg;
phys_addr_t phys;
unsigned int i, j, ret;
pr_emerg("access violation interrupt\n" );
for (i = 0 ; i < data->count; i++) {
void __iomem *p = data->pamu_reg_base + i * PAMU_OFFSET;
u32 pics = in_be32(p + PAMU_PICS);
if (pics & PAMU_ACCESS_VIOLATION_STAT) {
u32 avs1 = in_be32(p + PAMU_AVS1);
struct paace *paace;
pr_emerg("POES1=%08x\n" , in_be32(p + PAMU_POES1));
pr_emerg("POES2=%08x\n" , in_be32(p + PAMU_POES2));
pr_emerg("AVS1=%08x\n" , avs1);
pr_emerg("AVS2=%08x\n" , in_be32(p + PAMU_AVS2));
pr_emerg("AVA=%016llx\n" ,
make64(in_be32(p + PAMU_AVAH),
in_be32(p + PAMU_AVAL)));
pr_emerg("UDAD=%08x\n" , in_be32(p + PAMU_UDAD));
pr_emerg("POEA=%016llx\n" ,
make64(in_be32(p + PAMU_POEAH),
in_be32(p + PAMU_POEAL)));
phys = make64(in_be32(p + PAMU_POEAH),
in_be32(p + PAMU_POEAL));
/* Assume that POEA points to a PAACE */
if (phys) {
u32 *paace = phys_to_virt(phys);
/* Only the first four words are relevant */
for (j = 0 ; j < 4 ; j++)
pr_emerg("PAACE[%u]=%08x\n" ,
j, in_be32(paace + j));
}
/* clear access violation condition */
out_be32(p + PAMU_AVS1, avs1 & PAMU_AV_MASK);
paace = pamu_get_ppaace(avs1 >> PAMU_AVS1_LIODN_SHIFT);
BUG_ON(!paace);
/* check if we got a violation for a disabled LIODN */
if (!get_bf(paace->addr_bitfields, PAACE_AF_V)) {
/*
* As per hardware erratum A - 003638 , access
* violation can be reported for a disabled
* LIODN . If we hit that condition , disable
* access violation reporting .
*/
pics &= ~PAMU_ACCESS_VIOLATION_ENABLE;
} else {
/* Disable the LIODN */
ret = pamu_disable_liodn(avs1 >> PAMU_AVS1_LIODN_SHIFT);
BUG_ON(ret);
pr_emerg("Disabling liodn %x\n" ,
avs1 >> PAMU_AVS1_LIODN_SHIFT);
}
out_be32((p + PAMU_PICS), pics);
}
}
return IRQ_HANDLED;
}
#define LAWAR_EN 0 x80000000
#define LAWAR_TARGET_MASK 0 x0FF00000
#define LAWAR_TARGET_SHIFT 20
#define LAWAR_SIZE_MASK 0 x0000003F
#define LAWAR_CSDID_MASK 0 x000FF000
#define LAWAR_CSDID_SHIFT 12
#define LAW_SIZE_4K 0 xb
struct ccsr_law {
u32 lawbarh; /* LAWn base address high */
u32 lawbarl; /* LAWn base address low */
u32 lawar; /* LAWn attributes */
u32 reserved;
};
/*
* Create a coherence subdomain for a given memory block .
*/
static int create_csd(phys_addr_t phys, size_t size, u32 csd_port_id)
{
struct device_node *np;
const __be32 *iprop;
void __iomem *lac = NULL; /* Local Access Control registers */
struct ccsr_law __iomem *law;
void __iomem *ccm = NULL;
u32 __iomem *csdids;
unsigned int i, num_laws, num_csds;
u32 law_target = 0 ;
u32 csd_id = 0 ;
int ret = 0 ;
np = of_find_compatible_node(NULL, NULL, "fsl,corenet-law" );
if (!np)
return -ENODEV;
iprop = of_get_property(np, "fsl,num-laws" , NULL);
if (!iprop) {
ret = -ENODEV;
goto error;
}
num_laws = be32_to_cpup(iprop);
if (!num_laws) {
ret = -ENODEV;
goto error;
}
lac = of_iomap(np, 0 );
if (!lac) {
ret = -ENODEV;
goto error;
}
/* LAW registers are at offset 0xC00 */
law = lac + 0 xC00;
of_node_put(np);
np = of_find_compatible_node(NULL, NULL, "fsl,corenet-cf" );
if (!np) {
ret = -ENODEV;
goto error;
}
iprop = of_get_property(np, "fsl,ccf-num-csdids" , NULL);
if (!iprop) {
ret = -ENODEV;
goto error;
}
num_csds = be32_to_cpup(iprop);
if (!num_csds) {
ret = -ENODEV;
goto error;
}
ccm = of_iomap(np, 0 );
if (!ccm) {
ret = -ENOMEM;
goto error;
}
/* The undocumented CSDID registers are at offset 0x600 */
csdids = ccm + 0 x600;
of_node_put(np);
np = NULL;
/* Find an unused coherence subdomain ID */
for (csd_id = 0 ; csd_id < num_csds; csd_id++) {
if (!csdids[csd_id])
break ;
}
/* Store the Port ID in the (undocumented) proper CIDMRxx register */
csdids[csd_id] = csd_port_id;
/* Find the DDR LAW that maps to our buffer. */
for (i = 0 ; i < num_laws; i++) {
if (law[i].lawar & LAWAR_EN) {
phys_addr_t law_start, law_end;
law_start = make64(law[i].lawbarh, law[i].lawbarl);
law_end = law_start +
(2 ULL << (law[i].lawar & LAWAR_SIZE_MASK));
if (law_start <= phys && phys < law_end) {
law_target = law[i].lawar & LAWAR_TARGET_MASK;
break ;
}
}
}
if (i == 0 || i == num_laws) {
/* This should never happen */
ret = -ENOENT;
goto error;
}
/* Find a free LAW entry */
while (law[--i].lawar & LAWAR_EN) {
if (i == 0 ) {
/* No higher priority LAW slots available */
ret = -ENOENT;
goto error;
}
}
law[i].lawbarh = upper_32_bits(phys);
law[i].lawbarl = lower_32_bits(phys);
wmb();
law[i].lawar = LAWAR_EN | law_target | (csd_id << LAWAR_CSDID_SHIFT) |
(LAW_SIZE_4K + get_order(size));
wmb();
error:
if (ccm)
iounmap(ccm);
if (lac)
iounmap(lac);
if (np)
of_node_put(np);
return ret;
}
/*
* Table of SVRs and the corresponding PORT_ID values . Port ID corresponds to a
* bit map of snoopers for a given range of memory mapped by a LAW .
*
* All future CoreNet - enabled SOCs will have this erratum ( A - 004510 ) fixed , so this
* table should never need to be updated . SVRs are guaranteed to be unique , so
* there is no worry that a future SOC will inadvertently have one of these
* values .
*/
static const struct {
u32 svr;
u32 port_id;
} port_id_map[] = {
{(SVR_P2040 << 8 ) | 0 x10, 0 xFF000000}, /* P2040 1.0 */
{(SVR_P2040 << 8 ) | 0 x11, 0 xFF000000}, /* P2040 1.1 */
{(SVR_P2041 << 8 ) | 0 x10, 0 xFF000000}, /* P2041 1.0 */
{(SVR_P2041 << 8 ) | 0 x11, 0 xFF000000}, /* P2041 1.1 */
{(SVR_P3041 << 8 ) | 0 x10, 0 xFF000000}, /* P3041 1.0 */
{(SVR_P3041 << 8 ) | 0 x11, 0 xFF000000}, /* P3041 1.1 */
{(SVR_P4040 << 8 ) | 0 x20, 0 xFFF80000}, /* P4040 2.0 */
{(SVR_P4080 << 8 ) | 0 x20, 0 xFFF80000}, /* P4080 2.0 */
{(SVR_P5010 << 8 ) | 0 x10, 0 xFC000000}, /* P5010 1.0 */
{(SVR_P5010 << 8 ) | 0 x20, 0 xFC000000}, /* P5010 2.0 */
{(SVR_P5020 << 8 ) | 0 x10, 0 xFC000000}, /* P5020 1.0 */
{(SVR_P5021 << 8 ) | 0 x10, 0 xFF800000}, /* P5021 1.0 */
{(SVR_P5040 << 8 ) | 0 x10, 0 xFF800000}, /* P5040 1.0 */
};
#define SVR_SECURITY 0 x80000 /* The Security (E) bit */
static int fsl_pamu_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
void __iomem *pamu_regs = NULL;
struct ccsr_guts __iomem *guts_regs = NULL;
u32 pamubypenr, pamu_counter;
unsigned long pamu_reg_off;
unsigned long pamu_reg_base;
struct pamu_isr_data *data = NULL;
struct device_node *guts_node;
u64 size;
struct page *p;
int ret = 0 ;
int irq;
phys_addr_t ppaact_phys;
phys_addr_t spaact_phys;
struct ome *omt;
phys_addr_t omt_phys;
size_t mem_size = 0 ;
unsigned int order = 0 ;
u32 csd_port_id = 0 ;
unsigned i;
/*
* enumerate all PAMUs and allocate and setup PAMU tables
* for each of them ,
* NOTE : All PAMUs share the same LIODN tables .
*/
if (WARN_ON(probed))
return -EBUSY;
pamu_regs = of_iomap(dev->of_node, 0 );
if (!pamu_regs) {
dev_err(dev, "ioremap of PAMU node failed\n" );
return -ENOMEM;
}
of_get_address(dev->of_node, 0 , &size, NULL);
irq = irq_of_parse_and_map(dev->of_node, 0 );
if (!irq) {
dev_warn(dev, "no interrupts listed in PAMU node\n" );
goto error;
}
data = kzalloc(sizeof (*data), GFP_KERNEL);
if (!data) {
ret = -ENOMEM;
goto error;
}
data->pamu_reg_base = pamu_regs;
data->count = size / PAMU_OFFSET;
/* The ISR needs access to the regs, so we won't iounmap them */
ret = request_irq(irq, pamu_av_isr, 0 , "pamu" , data);
if (ret < 0 ) {
dev_err(dev, "error %i installing ISR for irq %i\n" , ret, irq);
goto error;
}
guts_node = of_find_matching_node(NULL, guts_device_ids);
if (!guts_node) {
dev_err(dev, "could not find GUTS node %pOF\n" , dev->of_node);
ret = -ENODEV;
goto error;
}
guts_regs = of_iomap(guts_node, 0 );
of_node_put(guts_node);
if (!guts_regs) {
dev_err(dev, "ioremap of GUTS node failed\n" );
ret = -ENODEV;
goto error;
}
/* read in the PAMU capability registers */
get_pamu_cap_values((unsigned long )pamu_regs);
/*
* To simplify the allocation of a coherency domain , we allocate the
* PAACT and the OMT in the same memory buffer . Unfortunately , this
* wastes more memory compared to allocating the buffers separately .
*/
/* Determine how much memory we need */
mem_size = (PAGE_SIZE << get_order(PAACT_SIZE)) +
(PAGE_SIZE << get_order(SPAACT_SIZE)) +
(PAGE_SIZE << get_order(OMT_SIZE));
order = get_order(mem_size);
p = alloc_pages(GFP_KERNEL | __GFP_ZERO, order);
if (!p) {
dev_err(dev, "unable to allocate PAACT/SPAACT/OMT block\n" );
ret = -ENOMEM;
goto error;
}
ppaact = page_address(p);
ppaact_phys = page_to_phys(p);
/* Make sure the memory is naturally aligned */
if (ppaact_phys & ((PAGE_SIZE << order) - 1 )) {
dev_err(dev, "PAACT/OMT block is unaligned\n" );
ret = -ENOMEM;
goto error;
}
spaact = (void *)ppaact + (PAGE_SIZE << get_order(PAACT_SIZE));
omt = (void *)spaact + (PAGE_SIZE << get_order(SPAACT_SIZE));
dev_dbg(dev, "ppaact virt=%p phys=%pa\n" , ppaact, &ppaact_phys);
/* Check to see if we need to implement the work-around on this SOC */
/* Determine the Port ID for our coherence subdomain */
for (i = 0 ; i < ARRAY_SIZE(port_id_map); i++) {
if (port_id_map[i].svr == (mfspr(SPRN_SVR) & ~SVR_SECURITY)) {
csd_port_id = port_id_map[i].port_id;
dev_dbg(dev, "found matching SVR %08x\n" ,
port_id_map[i].svr);
break ;
}
}
if (csd_port_id) {
dev_dbg(dev, "creating coherency subdomain at address %pa, size %zu, port id 0x%08x" ,
&ppaact_phys, mem_size, csd_port_id);
ret = create_csd(ppaact_phys, mem_size, csd_port_id);
if (ret) {
dev_err(dev, "could not create coherence subdomain\n" );
goto error;
}
}
spaact_phys = virt_to_phys(spaact);
omt_phys = virt_to_phys(omt);
pamubypenr = in_be32(&guts_regs->pamubypenr);
for (pamu_reg_off = 0 , pamu_counter = 0 x80000000; pamu_reg_off < size;
pamu_reg_off += PAMU_OFFSET, pamu_counter >>= 1 ) {
pamu_reg_base = (unsigned long )pamu_regs + pamu_reg_off;
setup_one_pamu(pamu_reg_base, pamu_reg_off, ppaact_phys,
spaact_phys, omt_phys);
/* Disable PAMU bypass for this PAMU */
pamubypenr &= ~pamu_counter;
}
setup_omt(omt);
/* Enable all relevant PAMU(s) */
out_be32(&guts_regs->pamubypenr, pamubypenr);
iounmap(guts_regs);
/* Enable DMA for the LIODNs in the device tree */
setup_liodns();
probed = true ;
return 0 ;
error:
if (irq)
free_irq(irq, data);
kfree_sensitive(data);
if (pamu_regs)
iounmap(pamu_regs);
if (guts_regs)
iounmap(guts_regs);
if (ppaact)
free_pages((unsigned long )ppaact, order);
ppaact = NULL;
return ret;
}
static struct platform_driver fsl_of_pamu_driver = {
.driver = {
.name = "fsl-of-pamu" ,
},
.probe = fsl_pamu_probe,
};
static __init int fsl_pamu_init(void )
{
struct platform_device *pdev = NULL;
struct device_node *np;
int ret;
/*
* The normal OF process calls the probe function at some
* indeterminate later time , after most drivers have loaded . This is
* too late for us , because PAMU clients ( like the Qman driver )
* depend on PAMU being initialized early .
*
* So instead , we " manually " call our probe function by creating the
* platform devices ourselves .
*/
/*
* We assume that there is only one PAMU node in the device tree . A
* single PAMU node represents all of the PAMU devices in the SOC
* already . Everything else already makes that assumption , and the
* binding for the PAMU nodes doesn ' t allow for any parent - child
* relationships anyway . In other words , support for more than one
* PAMU node would require significant changes to a lot of code .
*/
np = of_find_compatible_node(NULL, NULL, "fsl,pamu" );
if (!np) {
pr_err("could not find a PAMU node\n" );
return -ENODEV;
}
ret = platform_driver_register(&fsl_of_pamu_driver);
if (ret) {
pr_err("could not register driver (err=%i)\n" , ret);
goto error_driver_register;
}
pdev = platform_device_alloc("fsl-of-pamu" , 0 );
if (!pdev) {
pr_err("could not allocate device %pOF\n" , np);
ret = -ENOMEM;
goto error_device_alloc;
}
pdev->dev.of_node = of_node_get(np);
ret = pamu_domain_init();
if (ret)
goto error_device_add;
ret = platform_device_add(pdev);
if (ret) {
pr_err("could not add device %pOF (err=%i)\n" , np, ret);
goto error_device_add;
}
return 0 ;
error_device_add:
of_node_put(pdev->dev.of_node);
pdev->dev.of_node = NULL;
platform_device_put(pdev);
error_device_alloc:
platform_driver_unregister(&fsl_of_pamu_driver);
error_driver_register:
of_node_put(np);
return ret;
}
arch_initcall(fsl_pamu_init);
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(vorverarbeitet am 2026-09-29)
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