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kernel_samsung_a34x-permissive/drivers/misc/mediatek/pseudo_m4u/pseudo_m4u.c
Fede2782 6db4831e98
Import A346BXXU4BWK2 kernel source 
Android 14
2024-04-28 15:51:13 +02:00

3146 lines
74 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2019 MediaTek Inc.
*/
#include <linux/cdev.h>
#include <linux/iommu.h>
#include <linux/scatterlist.h>
#include <linux/dma-mapping.h>
#include <linux/dma-iommu.h>
#ifndef CONFIG_ARM64
#include <asm/dma-iommu.h>
#include <asm/memory.h>
#include <asm/cacheflush.h>
#include <asm/tlbflush.h>
#include <linux/highmem.h>
#include <asm/memory.h>
#else
#include <asm/system_misc.h> /* for build of show_pte in a64. */
#endif
#include <soc/mediatek/smi.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/mm.h>
#include <linux/vmalloc.h>
#include <linux/device.h>
#include <linux/memblock.h>
#include <asm/cacheflush.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/module.h>
#include <linux/uaccess.h>
#include <linux/proc_fs.h>
#include <linux/pagemap.h>
#include <linux/compat.h>
#include "pseudo_m4u.h"
#include "pseudo_m4u_log.h"
#include "mt_smi.h"
int m4u_log_level = 2;
int m4u_log_to_uart = 2;
LIST_HEAD(pseudo_sglist);
/* this is the mutex lock to protect mva_sglist->list*/
static DEFINE_MUTEX(pseudo_list_mutex);
static const struct of_device_id mtk_pseudo_of_ids[] = {
{ .compatible = "mediatek,mtk-pseudo-m4u",},
{}
};
static struct device *pseudo_m4u_dev;
/* garbage collect related */
struct m4u_device *gM4uDev;
/*
* will define userspace port id according to kernel
*/
static inline int m4u_user2kernel_port(int userport)
{
return userport;
}
static inline int m4u_kernel2user_port(int kernelport)
{
return kernelport;
}
static int MTK_M4U_flush(struct file *a_pstFile, fl_owner_t a_id)
{
return 0;
}
struct m4u_client_t *m4u_create_client(void)
{
struct m4u_client_t *client;
client = kmalloc(sizeof(struct m4u_client_t), GFP_ATOMIC);
if (!client)
return NULL;
mutex_init(&(client->dataMutex));
mutex_lock(&(client->dataMutex));
client->open_pid = current->pid;
client->open_tgid = current->tgid;
INIT_LIST_HEAD(&(client->mvaList));
mutex_unlock(&(client->dataMutex));
return client;
}
EXPORT_SYMBOL(m4u_create_client);
int m4u_destroy_client(struct m4u_client_t *client)
{
struct m4u_buf_info_t *pMvaInfo;
unsigned int mva, size;
int port;
while (1) {
mutex_lock(&(client->dataMutex));
if (list_empty(&client->mvaList)) {
mutex_unlock(&(client->dataMutex));
break;
}
pMvaInfo = container_of(client->mvaList.next,
struct m4u_buf_info_t, link);
M4U_MSG(
"warnning: clean garbage at m4u close: module=%s,va=0x%lx,mva=0x%x,size=%d\n",
m4u_get_port_name(pMvaInfo->port), pMvaInfo->va,
pMvaInfo->mva, pMvaInfo->size);
port = pMvaInfo->port;
mva = pMvaInfo->mva;
size = pMvaInfo->size;
mutex_unlock(&(client->dataMutex));
/* m4u_dealloc_mva will lock client->dataMutex again */
pseudo_dealloc_mva(client, port, mva);
}
kfree(client);
return 0;
}
EXPORT_SYMBOL(m4u_destroy_client);
static int MTK_M4U_open(struct inode *inode, struct file *file)
{
struct m4u_client_t *client;
M4U_DBG("enter %s process : %s\n", __func__, current->comm);
client = m4u_create_client();
if (IS_ERR_OR_NULL(client)) {
M4U_ERR("createclientfail\n");
return -ENOMEM;
}
file->private_data = client;
return 0;
}
static int MTK_M4U_release(struct inode *inode, struct file *file)
{
struct m4u_client_t *client = file->private_data;
M4U_DBG("enter %s process : %s\n", __func__, current->comm);
m4u_destroy_client(client);
return 0;
}
/*
* for mt8127 implement, the tee service call just implement the config port
* feature.
* there's no caller of m4u_alloc_mva_sec, both in normal world nor in security
* world. since the security world did not reserve the mva range in normal
* world. That's to say, we just need to handle config port, and do not need to
* handle alloc mva sec dealloc mva sec etc.
*/
#ifdef M4U_TEE_SERVICE_ENABLE
#include "tz_cross/trustzone.h"
#include "trustzone/kree/system.h"
#include "tz_cross/ta_m4u.h"
KREE_SESSION_HANDLE m4u_session;
bool m4u_tee_en;
static DEFINE_MUTEX(gM4u_port_tee);
static int pseudo_m4u_session_init(void)
{
int ret;
ret = KREE_CreateSession(TZ_TA_M4U_UUID, &m4u_session);
if (ret != TZ_RESULT_SUCCESS) {
M4U_ERR("m4u CreateSession error %d\n", ret);
return -1;
}
M4U_MSG("create session : 0x%x\n", (unsigned int)m4u_session);
m4u_tee_en = true;
return 0;
}
int m4u_larb_restore_sec(unsigned int larb_idx)
{
union MTEEC_PARAM param[4];
uint32_t paramTypes;
int ret;
if (!m4u_tee_en) /*tee may not init*/
return -2;
if (larb_idx == 0 || larb_idx == 4) { /*only support disp*/
param[0].value.a = larb_idx;
paramTypes = TZ_ParamTypes1(TZPT_VALUE_INPUT);
ret = KREE_TeeServiceCall(m4u_session,
M4U_TZCMD_LARB_REG_RESTORE,
paramTypes, param);
if (ret != TZ_RESULT_SUCCESS) {
M4U_ERR("m4u reg backup SeviceCall error %d\n", ret);
return -1;
}
}
return 0;
}
int m4u_larb_backup_sec(unsigned int larb_idx)
{
union MTEEC_PARAM param[4];
uint32_t paramTypes;
int ret;
if (!m4u_tee_en) /*tee may not init */
return -2;
if (larb_idx == 0 || larb_idx == 4) { /*only support disp*/
param[0].value.a = larb_idx;
paramTypes = TZ_ParamTypes1(TZPT_VALUE_INPUT);
ret = KREE_TeeServiceCall(m4u_session,
M4U_TZCMD_LARB_REG_BACKUP,
paramTypes, param);
if (ret != TZ_RESULT_SUCCESS) {
M4U_ERR("reg backup ServiceCall error %d\n", ret);
return -1;
}
}
return 0;
}
int smi_reg_backup_sec(void)
{
uint32_t paramTypes;
int ret;
paramTypes = TZ_ParamTypes1(TZPT_NONE);
ret = KREE_TeeServiceCall(m4u_session, M4U_TZCMD_REG_BACKUP,
paramTypes, NULL);
if (ret != TZ_RESULT_SUCCESS) {
M4U_ERR("m4u reg backup ServiceCall error %d\n", ret);
return -1;
}
return 0;
}
int smi_reg_restore_sec(void)
{
uint32_t paramTypes;
int ret;
paramTypes = TZ_ParamTypes1(TZPT_NONE);
ret = KREE_TeeServiceCall(m4u_session, M4U_TZCMD_REG_RESTORE,
paramTypes, NULL);
if (ret != TZ_RESULT_SUCCESS) {
M4U_ERR("m4u reg backup ServiceCall error %d\n", ret);
return -1;
}
return 0;
}
int pseudo_m4u_do_config_port(struct M4U_PORT_STRUCT *pM4uPort)
{
union MTEEC_PARAM param[4];
uint32_t paramTypes;
int ret;
/* do not config port if session has not been inited. */
if (!m4u_session)
return 0;
param[0].value.a = pM4uPort->ePortID;
param[0].value.b = pM4uPort->Virtuality;
param[1].value.a = pM4uPort->Distance;
param[1].value.b = pM4uPort->Direction;
paramTypes = TZ_ParamTypes2(TZPT_VALUE_INPUT, TZPT_VALUE_INPUT);
mutex_lock(&gM4u_port_tee);
ret = KREE_TeeServiceCall(m4u_session, M4U_TZCMD_CONFIG_PORT,
paramTypes, param);
mutex_unlock(&gM4u_port_tee);
if (ret != TZ_RESULT_SUCCESS)
M4U_ERR("m4u_config_port ServiceCall error 0x%x\n", ret);
return 0;
}
static int pseudo_m4u_sec_init(unsigned int u4NonSecPa,
unsigned int L2_enable, unsigned int *security_mem_size)
{
union MTEEC_PARAM param[4];
uint32_t paramTypes;
int ret;
param[0].value.a = u4NonSecPa;
param[0].value.b = 0;/* 4gb */
param[1].value.a = 1;
paramTypes = TZ_ParamTypes2(TZPT_VALUE_INPUT,
TZPT_VALUE_OUTPUT);
ret = KREE_TeeServiceCall(m4u_session, M4U_TZCMD_SEC_INIT,
paramTypes, param);
if (ret != TZ_RESULT_SUCCESS) {
M4U_ERR("m4u sec init error 0x%x\n", ret);
return -1;
}
*security_mem_size = param[1].value.a;
return 0;
}
/* the caller should enable smi clock, it should be only called by mtk_smi.c */
int pseudo_config_port_tee(int kernelport)
{
struct M4U_PORT_STRUCT pM4uPort;
pM4uPort.ePortID = m4u_kernel2user_port(kernelport);
pM4uPort.Virtuality = 1;
pM4uPort.Distance = 1;
pM4uPort.Direction = 1;
return pseudo_m4u_do_config_port(&pM4uPort);
}
/* Only for debug. If the port is nonsec, dump 0 for it. */
int m4u_dump_secpgd(unsigned int larbid, unsigned int portid,
unsigned long fault_mva)
{
union MTEEC_PARAM param[4];
uint32_t paramTypes;
int ret;
param[0].value.a = larbid << 5 | portid;
param[0].value.b = fault_mva & 0xfffff000;
param[1].value.a = 0xf;
paramTypes = TZ_ParamTypes2(TZPT_VALUE_INPUT, TZPT_VALUE_OUTPUT);
ret = KREE_TeeServiceCall(m4u_session, M4U_TZCMD_SECPGTDUMP,
paramTypes, param);
if (ret != TZ_RESULT_SUCCESS) {
M4U_ERR("m4u sec dump error 0x%x\n", ret);
return -1;
}
return param[1].value.a;
}
#endif
int m4u_dma_cache_flush_all(void)
{
/* L1 cache clean before hw read */
smp_inner_dcache_flush_all();
/* L2 cache maintenance by physical pages */
outer_flush_all();
return 0;
}
/* Return a device for iommu ops. */
struct device *m4u_get_larbdev(int portid)
{
return pseudo_m4u_dev;
}
int m4u_config_port(struct M4U_PORT_STRUCT *pM4uPort)
{
int ret = 0;
#ifdef M4U_TEE_SERVICE_ENABLE
/* Enable larb's clock. */
ret = pseudo_m4u_do_config_port(pM4uPort);
#endif
return ret;
}
int m4u_config_port_array(struct m4u_port_array *port_array)
{
return 0;
}
/* static struct iova_domain *giovad; */
#ifndef CONFIG_ARM64
static int __arm_coherent_iommu_map_sg(struct device *dev,
struct scatterlist *sg,
int nents, enum dma_data_direction dir, unsigned long attrs);
static void __arm_coherent_iommu_unmap_sg(struct device *dev,
struct scatterlist *sg,
int nents, enum dma_data_direction dir, unsigned long attrs);
#endif
static void m4u_show_pte(struct mm_struct *mm, unsigned long addr)
{
#ifndef CONFIG_ARM64
show_pte(mm, addr);
#else
show_pte(addr);
#endif
}
/*
* since the device have been attached, then we get from the dma_ops->map_sg is
* arm_iommu_map_sg
*/
static int __m4u_alloc_mva(int port, unsigned long va, unsigned int size,
struct sg_table *sg_table, unsigned int *retmva)
{
struct mva_sglist *mva_sg;
struct sg_table *table = NULL;
int ret, kernelport = m4u_user2kernel_port(port);
struct device *dev = m4u_get_larbdev(kernelport);
dma_addr_t dma_addr;
if (!va && !sg_table) {
M4U_ERR("va and sg_table are all NULL\n");
return -EINVAL;
}
/* this is for ion mm heap and ion fb heap usage. */
if (sg_table) {
struct scatterlist *s = sg_table->sgl, *ng;
phys_addr_t phys;
int i;
table = kzalloc(sizeof(*table), GFP_KERNEL);
if (!table)
return -ENOMEM;
ret = sg_alloc_table(table, sg_table->nents, GFP_KERNEL);
if (ret) {
kfree(table);
*retmva = 0;
return ret;
}
ng = table->sgl;
for (i = 0; i < sg_table->nents; i++) {
phys = sg_phys(s);
size += s->length;
sg_set_page(ng, sg_page(s), s->length, s->offset);
s = sg_next(s);
ng = sg_next(ng);
}
}
if (!table) {
table = m4u_create_sgtable(va, size);
/* table = pseudo_get_sg(port, va, size); */
if (IS_ERR_OR_NULL(table)) {
table = NULL;
M4U_ERR("pseudo_get_sg failed\n");
ret = -EINVAL;
goto err;
}
}
if (sg_table) {
#ifdef CONFIG_ARM64
iommu_dma_map_sg(dev, table->sgl, table->nents,
IOMMU_READ | IOMMU_WRITE);
#else
__arm_coherent_iommu_map_sg(dev, table->sgl, table->nents,
1, 0);
#endif
dma_addr = sg_dma_address(table->sgl);
} else {
#ifdef CONFIG_ARM64
iommu_dma_map_sg(dev, table->sgl, table->orig_nents,
IOMMU_READ | IOMMU_WRITE);
#else
__arm_coherent_iommu_map_sg(dev, table->sgl, table->orig_nents,
1, 0);
#endif
dma_addr = sg_dma_address(table->sgl);
}
#ifdef CONFIG_ARM64
if (dma_addr == 0) {
#else
if (dma_addr == ARM_MAPPING_ERROR) {
#endif
M4U_ERR(
"%s, %d alloc mva failed, port is %s, dma_address is 0x%lx, size is 0x%x\n",
__func__, __LINE__, m4u_get_port_name(port),
(unsigned long)dma_addr, size);
M4U_ERR(
"SUSPECT that iova have been all exhaust, maybe there's someone hold too much mva\n");
ret = -ENOMEM;
goto err;
}
*retmva = dma_addr;
mva_sg = kzalloc(sizeof(*mva_sg), GFP_KERNEL);
if (!mva_sg) {
ret = -ENOMEM;
goto err;
}
mva_sg->table = table;
mva_sg->mva = *retmva;
m4u_add_sgtable(mva_sg);
M4U_DBG("%s, %d mva is 0x%x, dma_address is 0x%lx, size is 0x%x\n",
__func__, __LINE__, mva_sg->mva, (unsigned long)dma_addr, size);
return 0;
err:
if (table) {
sg_free_table(table);
kfree(table);
}
*retmva = 0;
return ret;
}
static struct m4u_buf_info_t *m4u_alloc_buf_info(void)
{
struct m4u_buf_info_t *pList = NULL;
pList = kzalloc(sizeof(struct m4u_buf_info_t), GFP_KERNEL);
if (pList == NULL)
return NULL;
M4U_DBG("pList size %d, ptr %p\n",
(int)sizeof(struct m4u_buf_info_t), pList);
INIT_LIST_HEAD(&(pList->link));
return pList;
}
static int m4u_free_buf_info(struct m4u_buf_info_t *pList)
{
kfree(pList);
return 0;
}
static int m4u_client_add_buf(struct m4u_client_t *client,
struct m4u_buf_info_t *pList)
{
mutex_lock(&(client->dataMutex));
list_add(&(pList->link), &(client->mvaList));
mutex_unlock(&(client->dataMutex));
return 0;
}
/***********************************************************/
/** find or delete a buffer from client list
* @param client -- client to be searched
* @param mva -- mva to be searched
* @param del -- should we del this buffer from client?
*
* @return buffer_info if found, NULL on fail
* @remark
* @see
* @to-do we need to add multi domain support here.
* @author K Zhang @date 2013/11/14
************************************************************/
static struct m4u_buf_info_t *m4u_client_find_buf(struct m4u_client_t *client,
unsigned int mva, int del)
{
struct list_head *pListHead;
struct m4u_buf_info_t *pList = NULL;
struct m4u_buf_info_t *ret = NULL;
if (client == NULL) {
M4U_ERR("m4u_delete_from_garbage_list(), client is NULL!\n");
return NULL;
}
mutex_lock(&(client->dataMutex));
list_for_each(pListHead, &(client->mvaList)) {
pList = container_of(pListHead, struct m4u_buf_info_t, link);
if (pList->mva == mva)
break;
}
if (pListHead == &(client->mvaList)) {
ret = NULL;
} else {
if (del)
list_del(pListHead);
ret = pList;
}
mutex_unlock(&(client->dataMutex));
return ret;
}
/* interface for ion */
static struct m4u_client_t *ion_m4u_client;
int m4u_alloc_mva_sg(struct port_mva_info_t *port_info,
struct sg_table *sg_table)
{
if (!ion_m4u_client) {
ion_m4u_client = m4u_create_client();
if (IS_ERR_OR_NULL(ion_m4u_client)) {
ion_m4u_client = NULL;
return -1;
}
}
return pseudo_alloc_mva(ion_m4u_client, port_info->emoduleid, 0,
sg_table, port_info->buf_size, 0,
port_info->flags, &port_info->mva);
}
int pseudo_alloc_mva(struct m4u_client_t *client, int port,
unsigned long va, struct sg_table *sg_table,
unsigned int size, unsigned int prot,
unsigned int flags, unsigned int *pMva)
{
int ret, offset;
struct m4u_buf_info_t *pbuf_info;
unsigned int mva = 0;
unsigned long va_align = va;
unsigned int mva_align, size_align = size;
/* align the va to allocate continues iova. */
offset = m4u_va_align(&va_align, &size_align);
/* pbuf_info for userspace compatible */
pbuf_info = m4u_alloc_buf_info();
pbuf_info->va = va;
pbuf_info->port = port;
pbuf_info->size = size;
pbuf_info->prot = prot;
pbuf_info->flags = flags;
pbuf_info->sg_table = sg_table;
ret = __m4u_alloc_mva(port, va_align, size_align, sg_table, &mva_align);
if (ret) {
M4U_ERR("error alloc mva, %s, %d\n", __func__, __LINE__);
mva = 0;
goto err;
}
mva = mva_align + offset;
pbuf_info->mva = mva;
*pMva = mva;
m4u_client_add_buf(client, pbuf_info);
return 0;
err:
m4u_free_buf_info(pbuf_info);
return ret;
}
int pseudo_dealloc_mva(struct m4u_client_t *client, int port, unsigned int mva)
{
struct m4u_buf_info_t *pMvaInfo;
int offset, ret;
pMvaInfo = m4u_client_find_buf(client, mva, 1);
offset = m4u_va_align(&pMvaInfo->va, &pMvaInfo->size);
pMvaInfo->mva -= offset;
ret = __m4u_dealloc_mva(port, pMvaInfo->va, pMvaInfo->size, mva, NULL);
if (ret)
return ret;
m4u_free_buf_info(pMvaInfo);
return ret;
}
int m4u_dealloc_mva_sg(int eModuleID,
struct sg_table *sg_table,
const unsigned int BufSize, const unsigned int MVA)
{
if (!sg_table) {
M4U_ERR("%s, %d, sg_table is NULL\n", __func__, __LINE__);
return -EINVAL;
}
return __m4u_dealloc_mva(eModuleID, 0, BufSize, MVA, sg_table);
}
struct sg_table *m4u_find_sgtable(unsigned int mva)
{
struct mva_sglist *entry;
mutex_lock(&pseudo_list_mutex);
list_for_each_entry(entry, &pseudo_sglist, list) {
if (entry->mva == mva) {
mutex_unlock(&pseudo_list_mutex);
return entry->table;
}
}
mutex_unlock(&pseudo_list_mutex);
return NULL;
}
struct sg_table *m4u_del_sgtable(unsigned int mva)
{
struct mva_sglist *entry, *tmp;
struct sg_table *table;
M4U_DBG("%s, %d, mva = 0x%x\n", __func__, __LINE__, mva);
mutex_lock(&pseudo_list_mutex);
list_for_each_entry_safe(entry, tmp, &pseudo_sglist, list) {
M4U_DBG("%s, %d, entry->mva = 0x%x\n", __func__, __LINE__,
entry->mva);
if (entry->mva == mva) {
list_del(&entry->list);
mutex_unlock(&pseudo_list_mutex);
table = entry->table;
M4U_DBG("%s, %d, mva is 0x%x, entry->mva is 0x%x\n",
__func__, __LINE__, mva, entry->mva);
kfree(entry);
return table;
}
}
mutex_unlock(&pseudo_list_mutex);
return NULL;
}
struct sg_table *m4u_add_sgtable(struct mva_sglist *mva_sg)
{
struct sg_table *table;
table = m4u_find_sgtable(mva_sg->mva);
if (table)
return table;
table = mva_sg->table;
mutex_lock(&pseudo_list_mutex);
list_add(&mva_sg->list, &pseudo_sglist);
mutex_unlock(&pseudo_list_mutex);
M4U_DBG("adding pseudo_sglist, mva = 0x%x\n", mva_sg->mva);
return table;
}
/* make sure the va size is page aligned to get the continues iova. */
int m4u_va_align(unsigned long *addr, unsigned int *size)
{
int offset, remain;
/* we need to align the bufaddr to make sure the iova is continues */
offset = *addr & (M4U_PAGE_SIZE - 1);
if (offset) {
*addr &= ~(M4U_PAGE_SIZE - 1);
*size += offset;
}
/* make sure we alloc one page size iova at least */
remain = *size % M4U_PAGE_SIZE;
if (remain)
*size += M4U_PAGE_SIZE - remain;
/* dma32 would skip the last page, we added it here */
/* *size += PAGE_SIZE; */
return offset;
}
/* put ref count on all pages in sgtable */
int m4u_put_sgtable_pages(struct sg_table *table, int nents)
{
int i;
struct scatterlist *sg;
for_each_sg(table->sgl, sg, nents, i) {
struct page *page = sg_page(sg);
if (IS_ERR(page))
return 0;
if (page) {
if (!PageReserved(page))
SetPageDirty(page);
put_page(page);
}
}
return 0;
}
static int m4u_dump_mmaps(unsigned long addr)
{
struct vm_area_struct *vma;
M4U_MSG(
"addr=0x%lx, name=%s, pid=0x%x,",
addr, current->comm, current->pid);
vma = find_vma(current->mm, addr);
if (vma && (addr >= vma->vm_start)) {
M4U_MSG("find vma: 0x%16lx-0x%16lx, flags=0x%lx\n",
(vma->vm_start), (vma->vm_end), vma->vm_flags);
return 0;
}
M4U_ERR("cannot find vma for addr 0x%lx\n", addr);
return -1;
}
/* to-do: need modification to support 4G DRAM */
static phys_addr_t m4u_user_v2p(unsigned long va)
{
unsigned long pageOffset = (va & (PAGE_SIZE - 1));
pgd_t *pgd;
pud_t *pud;
pmd_t *pmd;
pte_t *pte;
phys_addr_t pa;
if (current == NULL) {
M4U_ERR("warning: %s, current is NULL!\n",
__func__);
return 0;
}
if (current->mm == NULL) {
M4U_ERR(
"warning: %s, current->mm is NULL! tgid=0x%x, name=%s\n",
__func__, current->tgid, current->comm);
return 0;
}
pgd = pgd_offset(current->mm, va); /* what is tsk->mm */
if (pgd_none(*pgd) || pgd_bad(*pgd)) {
M4U_ERR("%s(), va=0x%lx, pgd invalid!\n",
__func__, va);
return 0;
}
pud = pud_offset(pgd, va);
if (pud_none(*pud) || pud_bad(*pud)) {
M4U_ERR("%s(), va=0x%lx, pud invalid!\n",
__func__, va);
return 0;
}
pmd = pmd_offset(pud, va);
if (pmd_none(*pmd) || pmd_bad(*pmd)) {
M4U_ERR("%s(), va=0x%lx, pmd invalid!\n",
__func__, va);
return 0;
}
pte = pte_offset_map(pmd, va);
if (pte_present(*pte)) {
/* pa=(pte_val(*pte) & (PAGE_MASK)) | pageOffset; */
pa = (pte_val(*pte) & (PHYS_MASK) &
(~((phys_addr_t) 0xfff))) | pageOffset;
pte_unmap(pte);
return pa;
}
pte_unmap(pte);
M4U_ERR("%s(), va=0x%lx, pte invalid!\n",
__func__, va);
return 0;
}
#if 0
static int m4u_fill_sgtable_user(struct vm_area_struct *vma,
unsigned long va, int page_num,
struct scatterlist **pSg, int has_page)
{
unsigned long va_align;
phys_addr_t pa = 0;
int i;
long ret = 0;
struct scatterlist *sg = *pSg;
struct page *pages;
int gup_flags;
va_align = round_down(va, PAGE_SIZE);
gup_flags = FOLL_TOUCH | FOLL_POPULATE | FOLL_MLOCK;
if (vma->vm_flags & VM_LOCKONFAULT)
gup_flags &= ~FOLL_POPULATE;
/*
* We want to touch writable mappings with a write fault in order
* to break COW, except for shared mappings because these don't COW
* and we would not want to dirty them for nothing.
*/
if ((vma->vm_flags & (VM_WRITE | VM_SHARED)) == VM_WRITE)
gup_flags |= FOLL_WRITE;
/*
* We want mlock to succeed for regions that have any permissions
* other than PROT_NONE.
*/
if (vma->vm_flags & (VM_READ | VM_WRITE | VM_EXEC))
gup_flags |= FOLL_FORCE;
for (i = 0; i < page_num; i++) {
int fault_cnt;
unsigned long va_tmp = va_align+i*PAGE_SIZE;
pa = 0;
for (fault_cnt = 0; fault_cnt < 3000; fault_cnt++) {
if (has_page) {
ret = get_user_pages(va_tmp, 1,
gup_flags,
&pages, NULL);
if (ret == 1)
pa = page_to_phys(pages) |
(va_tmp & ~PAGE_MASK);
} else {
pa = m4u_user_v2p(va_tmp);
if (!pa) {
handle_mm_fault(vma, va_tmp,
(vma->vm_flags & VM_WRITE) ?
FAULT_FLAG_WRITE : 0);
}
}
if (pa) {
/* Add one line comment for avoid
*kernel coding style, WARNING:BRACES:
*/
break;
}
cond_resched();
}
if (!pa || !sg) {
struct vm_area_struct *vma_temp;
M4U_ERR("%s: fail(0x%lx) va=0x%lx,page_num=0x%x\n",
__func__, ret, va, page_num);
M4U_ERR("%s: fail_va=0x%lx,pa=0x%lx,sg=0x%p,i=%d\n",
__func__, va_tmp, (unsigned long)pa, sg, i);
vma_temp = find_vma(current->mm, va_tmp);
if (vma_temp != NULL) {
M4U_ERR(
"vm_start=0x%lx,vm_end=%lx,vm_flg=%lx\n",
vma->vm_start, vma->vm_end,
vma->vm_flags);
M4U_ERR(
"vma_temp_start=0x%lx, vma_temp_end=%lx,vm_temp_flag= %lx\n",
vma_temp->vm_start,
vma_temp->vm_end, vma_temp->vm_flags);
}
m4u_show_pte(current->mm, va_tmp);
m4u_dump_mmaps(va);
m4u_dump_mmaps(va_tmp);
return -1;
}
if (fault_cnt > 2) {
M4U_ERR("warning: handle_mm_fault for %d times\n",
fault_cnt);
m4u_show_pte(current->mm, va_tmp);
m4u_dump_mmaps(va_tmp);
}
/* debug check... */
if ((pa & (PAGE_SIZE - 1)) != 0) {
M4U_ERR("pa error,pa: 0x%lx, va: 0x%lx, align: 0x%lx\n",
(unsigned long)pa, va_tmp, va_align);
}
if (has_page) {
struct page *page;
page = phys_to_page(pa);
/*m4u_pr_err("page=0x%x, pfn=%d\n",
* page, __phys_to_pfn(pa));
*/
sg_set_page(sg, page, PAGE_SIZE, 0);
#ifdef CONFIG_NEED_SG_DMA_LENGTH
sg->dma_length = sg->length;
#endif
} else {
sg_dma_address(sg) = pa;
sg_dma_len(sg) = PAGE_SIZE;
}
sg = sg_next(sg);
}
*pSg = sg;
return 0;
}
static int m4u_create_sgtable_user(
unsigned long va_align, struct sg_table *table)
{
int ret = 0;
struct vm_area_struct *vma;
struct scatterlist *sg = table->sgl;
unsigned int left_page_num = table->nents;
unsigned long va = va_align;
down_read(&current->mm->mmap_sem);
while (left_page_num) {
unsigned int vma_page_num;
vma = find_vma(current->mm, va);
if (vma == NULL || vma->vm_start > va) {
M4U_ERR("cannot find vma: va=0x%lx, vma=0x%p\n",
va, vma);
if (vma != NULL) {
M4U_ERR(
"vm_start=0x%lx, vm_end=0x%lx,vm_flag= 0x%lx\n",
vma->vm_start, vma->vm_end,
vma->vm_flags);
}
m4u_dump_mmaps(va);
ret = -1;
goto out;
} else {
/* m4u_pr_warn("%s va: 0x%lx, vma->vm_start=0x%lx,
* vma->vm_end=0x%lx\n",
*__func__, va, vma->vm_start, vma->vm_end);
*/
}
vma_page_num = (vma->vm_end - va) / PAGE_SIZE;
vma_page_num = min(vma_page_num, left_page_num);
if ((vma->vm_flags) & VM_PFNMAP) {
/* ion va or ioremap vma has this flag */
/* VM_PFNMAP: Page-ranges managed
* without "struct page", just pure PFN
*/
ret = m4u_fill_sgtable_user(
vma, va, vma_page_num, &sg, 0);
M4U_DBG("alloc_mva VM_PFNMAP va=0x%lx, page_num=0x%x\n",
va, vma_page_num);
} else {
/* Add one line comment for avoid kernel
* coding style, WARNING:BRACES:
*/
ret = m4u_fill_sgtable_user(
vma, va, vma_page_num, &sg, 1);
if (-1 == ret) {
struct vm_area_struct *vma_temp;
vma_temp = find_vma(current->mm, va_align);
if (!vma_temp) {
M4U_ERR("%s cannot find vma\n",
__func__);
return -1;
}
M4U_ERR(
"%s: vm_start=0x%lx, vm_end=0x%lx,vm_flag= 0x%lx\n",
__func__, vma_temp->vm_start,
vma_temp->vm_end, vma_temp->vm_flags);
}
}
if (ret) {
/* Add one line comment for avoid kernel
* coding style, WARNING:BRACES:
*/
goto out;
}
left_page_num -= vma_page_num;
va += vma_page_num * PAGE_SIZE;
}
out:
up_read(&current->mm->mmap_sem);
return ret;
}
#endif
static struct frame_vector *m4u_get_vaddr_framevec(unsigned long va_base,
int nr_pages)
{
struct frame_vector *vec = NULL;
struct mm_struct *mm = current->mm;
int ret = 0;
struct vm_area_struct *vma;
int gup_flags;
vma = find_vma(mm, va_base);
if (!vma) {
M4U_ERR("%s: pid %d, get mva fail, va 0x%lx(pgnum %d)\n",
__func__, current->pid, va_base, nr_pages);
return ERR_PTR(-EINVAL);
}
if ((va_base + (nr_pages << PAGE_SHIFT)) > vma->vm_end) {
M4U_ERR("%s: pid %d, va 0x%lx(pgnum %d), vma 0x%lx~0x%lx\n",
__func__, current->pid, va_base, nr_pages,
vma->vm_start, vma->vm_end);
return ERR_PTR(-EINVAL);
}
vec = frame_vector_create(nr_pages);
if (!vec)
return ERR_PTR(-ENOMEM);
gup_flags = FOLL_TOUCH | FOLL_POPULATE | FOLL_MLOCK;
if (vma->vm_flags & VM_LOCKONFAULT)
gup_flags &= ~FOLL_POPULATE;
/*
* We want to touch writable mappings with a write fault
* in order to break COW, except for shared mappings
* because these don't COW and we would not want to
* dirty them for nothing.
*/
if ((vma->vm_flags & (VM_WRITE | VM_SHARED)) == VM_WRITE)
gup_flags |= FOLL_WRITE;
/*
* We want mlock to succeed for regions that have any
* permissions other than PROT_NONE.
*/
if (vma->vm_flags & (VM_READ | VM_WRITE | VM_EXEC))
gup_flags |= FOLL_FORCE;
ret = get_vaddr_frames(va_base, nr_pages, gup_flags, vec);
if (ret < 0)
goto m4u_get_frmvec_dst;
else if (ret != nr_pages) {
ret = -EFAULT;
goto m4u_get_frmvec_rls;
}
return vec;
m4u_get_frmvec_rls:
put_vaddr_frames(vec);
m4u_get_frmvec_dst:
frame_vector_destroy(vec);
return ERR_PTR(ret);
}
static void m4u_put_vaddr_framevec(struct frame_vector *vec)
{
put_vaddr_frames(vec);
frame_vector_destroy(vec);
}
/* make a sgtable for virtual buffer */
struct sg_table *m4u_create_sgtable(unsigned long va, unsigned int size)
{
struct sg_table *table = NULL;
struct scatterlist *s;
int ret, page_num, i;
unsigned long va_align, offset;
struct frame_vector *vec = NULL;
page_num = M4U_GET_PAGE_NUM(va, size);
va_align = round_down(va, PAGE_SIZE);
offset = va & ~PAGE_MASK;
M4U_DBG("%s va=0x%lx, PG OFF=0x%lx, VM START~END=0x%lx~0x%lx\n",
__func__, va, PAGE_OFFSET, VMALLOC_START, VMALLOC_END);
table = kmalloc(sizeof(struct sg_table), GFP_KERNEL);
if (!table)
return ERR_PTR(-ENOMEM);
vec = m4u_get_vaddr_framevec(va_align, page_num);
if (IS_ERR_OR_NULL(vec)) {
kfree(table);
M4U_ERR(
"%s get frmvec fail %ld: va = 0x%lx, sz = 0x%x, pgnum = %d\n",
__func__, PTR_ERR(vec), va, size, page_num);
return (struct sg_table *)vec;
}
ret = frame_vector_to_pages(vec);
if (ret < 0) {
M4U_ERR("%s get frmvec pg fail\n", __func__);
goto m4u_create_sgtbl_out;
}
ret = sg_alloc_table_from_pages(table, frame_vector_pages(vec),
page_num, offset, size, GFP_KERNEL);
if (ret) {
M4U_ERR("%s set tbl pages fail\n", __func__);
goto m4u_create_sgtbl_out;
}
/*
* For sg_alloc_table with empty table object, it will not clear the
* sgtable->sgl space to zero which allocated by kmalloc.
* In here, we manually initialize the dma information of sgl for
* stable execution.
*/
for_each_sg(table->sgl, s, table->nents, i) {
sg_dma_address(s) = 0;
sg_dma_len(s) = 0;
}
m4u_create_sgtbl_out:
m4u_put_vaddr_framevec(vec);
if (ret) {
kfree(table);
M4U_ERR("%s fail %d: va = 0x%lx, sz = 0x%x, pgnum = %d\n",
__func__, ret, va, size, page_num);
return ERR_PTR(ret);
}
return table;
}
/* the caller should make sure the mva offset have been eliminated. */
int __m4u_dealloc_mva(int eModuleID,
const unsigned long BufAddr,
const unsigned int BufSize, const unsigned int MVA,
struct sg_table *sg_table)
{
struct sg_table *table = NULL;
int kernelport = m4u_user2kernel_port(eModuleID);
struct device *dev = m4u_get_larbdev(kernelport);
unsigned long addr_align = MVA;
unsigned int size_align = BufSize;
int offset;
if (!dev) {
M4U_ERR("%s, %d, dev is NULL\n", __func__, __LINE__);
return -EINVAL;
}
M4U_DBG(
"m4u_dealloc_mva, module = %s, addr = 0x%lx, size = 0x%x,MVA = 0x%x, mva_end = 0x%x\n",
m4u_get_port_name(kernelport), BufAddr, BufSize, MVA,
MVA + BufSize - 1);
/* for ion sg alloc, we did not align the mva in allocation. */
if (!sg_table)
offset = m4u_va_align(&addr_align, &size_align);
if (sg_table) {
struct m4u_buf_info_t *m4u_buf_info;
m4u_buf_info = m4u_client_find_buf(ion_m4u_client, addr_align,
1);
if (m4u_buf_info && m4u_buf_info->mva != addr_align)
M4U_ERR("warning: %s, %d, mva addr are not same\n",
__func__, __LINE__);
table = m4u_del_sgtable(addr_align);
if (!table) {
M4U_ERR(
"%s-%d could not find the table from mva 0x%x\n",
__func__, __LINE__, MVA);
M4U_ERR(
"m4u_dealloc_mva, module = %s, addr = 0x%lx,size = 0x%x, MVA = 0x%x, mva_end = 0x%x\n",
m4u_get_port_name(kernelport), BufAddr,
BufSize, MVA, MVA + BufSize - 1);
dump_stack();
return -EINVAL;
}
if (sg_page(table->sgl) != sg_page(sg_table->sgl)) {
M4U_ERR("%s, %d, error, sg have not been added\n",
__func__, __LINE__);
return -EINVAL;
}
m4u_free_buf_info(m4u_buf_info);
}
if (!table)
table = m4u_del_sgtable(addr_align);
if (table) {
/* Free iova and unmap pgtable items.*/
#ifdef CONFIG_ARM64
iommu_dma_unmap_sg(dev, table->sgl, table->orig_nents, 0, 0);
#else
__arm_coherent_iommu_unmap_sg(dev, table->sgl, table->nents, 0,
0);
#endif
} else {
M4U_ERR("could not found the sgtable and would return error\n");
return -EINVAL;
}
if (BufAddr) {
/* from user space */
if (BufAddr < PAGE_OFFSET) {
struct vm_area_struct *vma = NULL;
M4UTRACE();
if (current->mm) {
down_read(&current->mm->mmap_sem);
vma = find_vma(current->mm, BufAddr);
} else if (current->active_mm) {
down_read(&current->active_mm->mmap_sem);
vma = NULL;
}
M4UTRACE();
if (vma == NULL) {
M4U_ERR(
"cannot find vma: module=%s, va=0x%lx,size=0x%x\n",
m4u_get_port_name(eModuleID), BufAddr,
BufSize);
if (current->mm)
up_read(&current->mm->mmap_sem);
else if (current->active_mm)
up_read(&current->active_mm->mmap_sem);
goto out;
}
if ((vma->vm_flags) & VM_PFNMAP) {
if (current->mm)
up_read(&current->mm->mmap_sem);
else if (current->active_mm)
up_read(&current->active_mm->mmap_sem);
goto out;
}
if (current->mm)
up_read(&current->mm->mmap_sem);
else if (current->active_mm)
up_read(&current->active_mm->mmap_sem);
if (!((BufAddr >= VMALLOC_START) &&
(BufAddr <= VMALLOC_END)))
if (!sg_table) {
if (BufAddr + BufSize < vma->vm_end)
m4u_put_sgtable_pages(table,
table->nents);
else
m4u_put_sgtable_pages(table,
table->nents - 1);
}
}
}
out:
if (table) {
sg_free_table(table);
kfree(table);
}
M4UTRACE();
return 0;
}
/*
* when using this interface, the m4u alloc mva have make the va and mva with
* the page offset, so the caller should make sure the offset and size is
* already eliminated.
* or the iova we got from map_sg could not be unmapped all.
*/
int m4u_dealloc_mva(int eModuleID,
const unsigned long BufAddr, const unsigned int BufSize,
const unsigned int MVA)
{
return __m4u_dealloc_mva(eModuleID, BufAddr, BufSize, MVA, NULL);
}
void m4u_dma_cache_flush_range(void *start, size_t size)
{
#ifndef CONFIG_MTK_CACHE_FLUSH_RANGE_PARALLEL
#ifdef CONFIG_ARM64
__dma_flush_area((void *)start, size);
#else
dmac_flush_range((void *)start, (void *)(start + size));
#endif
#else
mt_smp_cache_flush_m4u(start, size);
#endif
}
/*
* the cache sync related ops are just copy from original implementation of
* mt7623.
*/
static struct vm_struct *cache_map_vm_struct;
int m4u_cache_sync_init(void)
{
cache_map_vm_struct = get_vm_area(PAGE_SIZE, VM_ALLOC);
if (!cache_map_vm_struct)
return -ENOMEM;
return 0;
}
static void *m4u_cache_map_page_va(struct page *page)
{
int ret;
struct page **ppPage = &page;
ret = map_vm_area(cache_map_vm_struct, PAGE_KERNEL, ppPage);
if (ret) {
M4U_ERR("error to map page\n");
return NULL;
}
return cache_map_vm_struct->addr;
}
static void m4u_cache_unmap_page_va(unsigned long va)
{
unmap_kernel_range((unsigned long)cache_map_vm_struct->addr, PAGE_SIZE);
}
static int __m4u_cache_sync_kernel(const void *start,
size_t size, enum M4U_CACHE_SYNC_ENUM sync_type)
{
if (sync_type == M4U_CACHE_CLEAN_BY_RANGE)
dmac_map_area((void *)start, size, DMA_TO_DEVICE);
else if (sync_type == M4U_CACHE_INVALID_BY_RANGE)
dmac_unmap_area((void *)start, size, DMA_FROM_DEVICE);
else if (sync_type == M4U_CACHE_FLUSH_BY_RANGE)
#ifndef CONFIG_MTK_CACHE_FLUSH_RANGE_PARALLEL
#ifdef CONFIG_ARM64
__dma_flush_area((void *)start, size);
#else
dmac_flush_range((void *)start, (void *)(start + size));
#endif
#else
mt_smp_cache_flush_m4u(start, size);
#endif
return 0;
}
static struct page *m4u_cache_get_page(unsigned long va)
{
unsigned long start;
phys_addr_t pa;
struct page *page;
start = va & (~M4U_PAGE_MASK);
pa = m4u_user_v2p(start);
if (pa == 0) {
M4U_ERR(
"error m4u_get_phys user_v2p return 0 on va=0x%lx\n",
start);
/* dump_page(page); */
m4u_dump_mmaps(start);
m4u_show_pte(current->mm, va);
return NULL;
}
page = phys_to_page(pa);
return page;
}
/* lock to protect cache_map_vm_struct */
static DEFINE_MUTEX(gM4u_cache_sync_user_lock);
static int __m4u_cache_sync_user(unsigned long start,
size_t size, enum M4U_CACHE_SYNC_ENUM sync_type)
{
unsigned long map_size, map_start, map_end;
unsigned long end = start + size;
/* unsigned int fragment; */
struct page *page;
unsigned long map_va, map_va_align;
int ret = 0;
mutex_lock(&gM4u_cache_sync_user_lock);
if (!cache_map_vm_struct) {
M4U_ERR("error: cache_map_vm_struct is NULL, retry\n");
m4u_cache_sync_init();
}
if (!cache_map_vm_struct) {
M4U_ERR(
"error: cache_map_vm_struct is NULL, no vmalloc area\n");
ret = -1;
goto out;
}
M4U_DBG("__m4u_sync_user: start=0x%lx, size=0x%x\n", start,
(unsigned int)size);
map_start = start;
while (map_start < end) {
map_end = min((map_start & (~M4U_PAGE_MASK)) + M4U_PAGE_SIZE,
end);
map_size = map_end - map_start;
page = m4u_cache_get_page(map_start);
if (!page) {
ret = -1;
goto out;
}
map_va = (unsigned long)m4u_cache_map_page_va(page);
if (!map_va) {
ret = -1;
goto out;
}
map_va_align = map_va | (map_start & (M4U_PAGE_SIZE - 1));
M4U_DBG("__m4u_sync_user:start=0x%lx, size=0x%lx,va=0x%lx\n",
map_start, map_size, map_va_align);
__m4u_cache_sync_kernel((void *)map_va_align,
map_size, sync_type);
m4u_cache_unmap_page_va(map_va);
map_start = map_end;
}
out:
mutex_unlock(&gM4u_cache_sync_user_lock);
return ret;
}
int m4u_cache_sync_by_range(unsigned long va, unsigned int size,
enum M4U_CACHE_SYNC_ENUM sync_type,
struct sg_table *table)
{
int ret = 0;
if (va < PAGE_OFFSET) { /* from user space */
ret = __m4u_cache_sync_user(va, size, sync_type);
} else {
ret = __m4u_cache_sync_kernel((void *)va, size, sync_type);
}
#ifdef CONFIG_OUTER_CACHE
{
struct scatterlist *sg;
int i;
for_each_sg(table->sgl, sg, table->nents, i) {
unsigned int len = sg_dma_len(sg);
phys_addr_t phys_addr = get_sg_phys(sg);
if (sync_type == M4U_CACHE_CLEAN_BY_RANGE)
outer_clean_range(phys_addr, phys_addr + len);
else if (sync_type == M4U_CACHE_INVALID_BY_RANGE)
outer_inv_range(phys_addr, phys_addr + len);
else if (sync_type == M4U_CACHE_FLUSH_BY_RANGE)
outer_flush_range(phys_addr, phys_addr + len);
}
}
#endif
return ret;
}
/* notes: only mva allocated by m4u_alloc_mva can use this function.*/
/* if buffer is allocated by ion, please use ion_cache_sync*/
int m4u_cache_sync(struct m4u_client_t *client,
int port,
unsigned long va, unsigned int size, unsigned int mva,
enum M4U_CACHE_SYNC_ENUM sync_type)
{
int ret = 0;
M4U_DBG(
"cache_sync port=%s, va=0x%lx, size=0x%x, mva=0x%x, type=%d\n",
m4u_get_port_name(port), va, size, mva, sync_type);
if (sync_type < M4U_CACHE_CLEAN_ALL) {
struct m4u_buf_info_t *pMvaInfo = NULL;
if (client)
pMvaInfo = m4u_client_find_buf(client, mva, 0);
/* some user may sync mva from other client
* (eg. ovl may not know
* who allocated this buffer, but he need to sync cache).
* we make a workaround here by query mva from mva manager
*/
/* if (!pMvaInfo)
* pMvaInfo = mva_get_priv(mva);
*/
if (!pMvaInfo) {
M4U_ERR(
"cache sync fail, cannot find buf: mva=0x%x, client=0x%p\n",
mva, client);
return -1;
}
if ((pMvaInfo->size != size) || (pMvaInfo->va != va)) {
M4U_ERR(
"cache_sync fail: expect mva=0x%x,size=0x%x,va=0x%lx, but mva=0x%x,size=0x%x,va=0x%lx\n",
pMvaInfo->mva, pMvaInfo->size,
pMvaInfo->va, mva, size, va);
return -1;
}
/* va size should be cache line align */
if ((va | size) & (L1_CACHE_BYTES - 1)) {
M4U_ERR(
"warning: cache_sync not align: va=0x%lx,size=0x%x,align=0x%x\n",
va, size, L1_CACHE_BYTES);
}
ret = m4u_cache_sync_by_range(va, size,
sync_type, pMvaInfo->sg_table);
} else {
/* All cache operation */
if (sync_type == M4U_CACHE_CLEAN_ALL) {
smp_inner_dcache_flush_all();
outer_clean_all();
} else if (sync_type == M4U_CACHE_INVALID_ALL) {
M4U_ERR("no one can use invalid all!\n");
return -1;
} else if (sync_type == M4U_CACHE_FLUSH_ALL) {
smp_inner_dcache_flush_all();
outer_flush_all();
}
}
return ret;
}
void m4u_dma_map_area(void *start, size_t size, enum M4U_DMA_DIR dir)
{
if (dir == M4U_DMA_FROM_DEVICE)
dmac_map_area(start, size, DMA_FROM_DEVICE);
else if (dir == M4U_DMA_TO_DEVICE)
dmac_map_area(start, size, DMA_TO_DEVICE);
else if (dir == M4U_DMA_BIDIRECTIONAL)
dmac_map_area(start, size, DMA_BIDIRECTIONAL);
}
void m4u_dma_unmap_area(void *start, size_t size, enum M4U_DMA_DIR dir)
{
if (dir == M4U_DMA_FROM_DEVICE)
dmac_unmap_area(start, size, DMA_FROM_DEVICE);
else if (dir == M4U_DMA_TO_DEVICE)
dmac_unmap_area(start, size, DMA_TO_DEVICE);
else if (dir == M4U_DMA_BIDIRECTIONAL)
dmac_unmap_area(start, size, DMA_BIDIRECTIONAL);
}
static long m4u_dma_op(struct m4u_client_t *client, int port,
unsigned long va, unsigned int size, unsigned int mva,
enum M4U_DMA_TYPE dma_type, enum M4U_DMA_DIR dma_dir)
{
struct scatterlist *sg;
int i, j;
struct sg_table *table = NULL;
int npages = 0;
unsigned long start = -1;
struct m4u_buf_info_t *pMvaInfo = NULL;
if (client)
pMvaInfo = m4u_client_find_buf(client, mva, 0);
/* some user may sync mva from other client*/
/*(eg. ovl may not know who allocated this buffer,*/
/*but he need to sync cache).*/
/*we make a workaround here by query mva from mva manager */
/*
* if (!pMvaInfo)
* pMvaInfo = mva_get_priv(mva);
*/
if (!pMvaInfo) {
M4U_ERR(
"m4u dma fail,cannot find buf: mva=0x%x, client=0x%p.\n",
mva, client);
return -1;
}
if ((pMvaInfo->size != size) || (pMvaInfo->va != va)) {
M4U_ERR(
"m4u dma fail: expect mva=0x%x,size=0x%x,va=0x%lx, but mva=0x%x,size=0x%x,va=0x%lx\n",
pMvaInfo->mva, pMvaInfo->size,
pMvaInfo->va, mva, size, va);
return -1;
}
/* va size should be cache line align */
if ((va|size) & (L1_CACHE_BYTES-1))
M4U_ERR(
"warning: cache_sync not align: va=0x%lx,size=0x%x,align=0x%x\n",
va, size, L1_CACHE_BYTES);
table = pMvaInfo->sg_table;
/* npages = PAGE_ALIGN(size) / PAGE_SIZE; */
npages = M4U_GET_PAGE_NUM(va, size);
mutex_lock(&gM4u_cache_sync_user_lock);
if (!cache_map_vm_struct) {
M4U_ERR("error: cache_map_vm_struct is NULL, retry\n");
m4u_cache_sync_init();
}
if (!cache_map_vm_struct) {
M4U_ERR(
"error: cache_map_vm_struct is NULL, no vmalloc area\n");
mutex_unlock(&gM4u_cache_sync_user_lock);
return -ENOMEM;
}
for_each_sg(table->sgl, sg, table->nents, i) {
int npages_this_entry = PAGE_ALIGN(sg_dma_len(sg)) / PAGE_SIZE;
struct page *page = sg_page(sg);
if (!page) {
phys_addr_t pa = sg_dma_address(sg);
if (!pa) {
M4U_ERR("%s fail, VM_PFNMAP, no page.\n",
__func__);
return -EFAULT;
}
page = phys_to_page(pa);
if (!pfn_valid(page_to_pfn(page))) {
M4U_ERR(
"%s fail, VM_PFNMAP, no page, va = 0x%lx, size = 0x%x, npages = 0x%x.\n",
__func__, va, size, npages);
return -EFAULT;
}
}
if (i >= npages)
M4U_ERR(
"sg table is over pages number, i=%d, npages=0x%x\n",
i, npages);
for (j = 0; j < npages_this_entry; j++) {
start = (unsigned long) m4u_cache_map_page_va(page++);
if (IS_ERR_OR_NULL((void *) start)) {
M4U_ERR("cannot do cache sync: ret=%lu\n",
start);
mutex_unlock(&gM4u_cache_sync_user_lock);
return -EFAULT;
}
if (dma_type == M4U_DMA_MAP_AREA)
m4u_dma_map_area((void *)start,
PAGE_SIZE, dma_dir);
else if (dma_type == M4U_DMA_UNMAP_AREA)
m4u_dma_unmap_area((void *)start,
PAGE_SIZE, dma_dir);
else if (dma_type == M4U_DMA_FLUSH_BY_RANGE)
m4u_dma_cache_flush_range((void *)start,
PAGE_SIZE);
m4u_cache_unmap_page_va(start);
}
}
mutex_unlock(&gM4u_cache_sync_user_lock);
return 0;
}
/*
* inherent this from original m4u driver, we use this to make sure we
* could still support userspace ioctl commands.
*/
static long
MTK_M4U_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
int ret = 0;
struct M4U_MOUDLE_STRUCT m4u_module;
struct M4U_PORT_STRUCT m4u_port;
int PortID;
int ModuleID;
struct M4U_CACHE_STRUCT m4u_cache_data;
struct M4U_DMA_STRUCT m4u_dma_data;
struct m4u_client_t *client = filp->private_data;
switch (cmd) {
case MTK_M4U_T_POWER_ON:
ret = copy_from_user(&ModuleID, (void *)arg,
sizeof(unsigned int));
if (ret) {
M4U_ERR("MTK_M4U_T_POWER_ON,copy_from_user failed,%d\n",
ret);
return -EFAULT;
}
ret = 0;
break;
case MTK_M4U_T_POWER_OFF:
ret = copy_from_user(&ModuleID, (void *)arg,
sizeof(unsigned int));
if (ret) {
M4U_ERR(
"MTK_M4U_T_POWER_OFF,copy_from_user failed,%d\n",
ret);
return -EFAULT;
}
ret = 0;
break;
case MTK_M4U_T_ALLOC_MVA:
ret = copy_from_user(&m4u_module, (void *)arg,
sizeof(struct M4U_MOUDLE_STRUCT));
if (ret) {
M4U_ERR(
"MTK_M4U_T_ALLOC_MVA,copy_from_user failed:%d\n",
ret);
return -EFAULT;
}
if (!m4u_portid_valid(m4u_module.port)) {
M4U_ERR("m4u T_ALLOC_MVA, portid %d failed\n",
m4u_module.port);
return -EINVAL;
}
M4U_DBG("T_ALLOC_MVA, %s, %d\n", __func__, __LINE__);
ret = pseudo_alloc_mva(client, m4u_module.port,
m4u_module.BufAddr,
NULL, m4u_module.BufSize, m4u_module.prot,
m4u_module.flags, &(m4u_module.MVAStart));
if (ret)
return ret;
ret = copy_to_user(
&(((struct M4U_MOUDLE_STRUCT *) arg)->MVAStart),
&(m4u_module.MVAStart),
sizeof(unsigned int));
if (ret) {
M4U_ERR("T_ALLOC_MVA,copy_from_user failed:%d\n",
ret);
return -EFAULT;
}
break;
case MTK_M4U_T_DEALLOC_MVA:
{
int offset;
struct m4u_buf_info_t *pMvaInfo;
unsigned long align_mva;
ret = copy_from_user(&m4u_module, (void *)arg,
sizeof(struct M4U_MOUDLE_STRUCT));
if (ret) {
M4U_ERR("T_DEALLOC_MVA,cpy failed:%d\n",
ret);
return -EFAULT;
}
M4U_DBG(
"DEALLOC_MVA, eModuleID: %d, VABuf:0x%lx, Length : %d, MVAStart = 0x%x\n",
m4u_module.port, m4u_module.BufAddr,
m4u_module.BufSize, m4u_module.MVAStart);
if (!m4u_module.BufAddr || !m4u_module.BufSize) {
M4U_DBG(
"MTK_M4U_T_DEALLOC_MVA va:0x%lx, sz:0x%x",
m4u_module.BufAddr, m4u_module.BufSize);
/* return -EINVAL;*/
}
/*
* we store the not aligned value in m4u client, but
* aligned value in pseudo_sglist, so we need to delete
* from client with the not-aligned value and deallocate
* mva with the aligned value.
*/
pMvaInfo = m4u_client_find_buf(client,
m4u_module.MVAStart, 1);
/* to pass the code defect check */
align_mva = m4u_module.MVAStart;
offset = m4u_va_align(&align_mva, &m4u_module.BufSize);
m4u_module.MVAStart = align_mva & 0xffffffff;
/* m4u_module.MVAStart -= offset; */
if (m4u_module.MVAStart != 0) {
m4u_dealloc_mva(m4u_module.port,
m4u_module.BufAddr,
m4u_module.BufSize,
m4u_module.MVAStart);
m4u_free_buf_info(pMvaInfo);
} else {
M4U_ERR(
"warning: dealloc a registered buffer.\n");
M4U_ERR(
"error to dealloc mva : id = %s, va = 0x%lx, size = %d, mva = 0x%x\n",
m4u_get_port_name(m4u_module.port),
m4u_module.BufAddr, m4u_module.BufSize,
m4u_module.MVAStart);
}
}
break;
case MTK_M4U_T_DUMP_INFO:
ret = copy_from_user(&ModuleID, (void *)arg,
sizeof(unsigned int));
if (ret) {
M4U_ERR("MTK_M4U_T_DUMP_INFO failed,%d\n", ret);
return -EFAULT;
}
break;
case MTK_M4U_T_CACHE_SYNC:
ret = copy_from_user(&m4u_cache_data, (void *)arg,
sizeof(struct M4U_CACHE_STRUCT));
if (ret) {
M4U_ERR("m4u_cache_sync,copy_from_user failed:%d\n",
ret);
return -EFAULT;
}
if (!m4u_portid_valid(m4u_cache_data.port)) {
M4U_ERR("m4u T_CACHE_SYNC,portid %d failed\n",
m4u_cache_data.port);
return -EINVAL;
}
ret = m4u_cache_sync(client, m4u_cache_data.port,
m4u_cache_data.va,
m4u_cache_data.size, m4u_cache_data.mva,
m4u_cache_data.eCacheSync);
break;
case MTK_M4U_T_DMA_OP:
ret = copy_from_user(&m4u_dma_data, (void *) arg,
sizeof(struct M4U_DMA_STRUCT));
if (ret) {
M4U_ERR("dma map/unmap area,cpy failed:%d\n", ret);
return -EFAULT;
}
if (!m4u_portid_valid(m4u_dma_data.port)) {
M4U_ERR("m4u dma map/unmap area,portid %d failed\n",
m4u_dma_data.port);
return -EINVAL;
}
ret = m4u_dma_op(client, m4u_dma_data.port, m4u_dma_data.va,
m4u_dma_data.size, m4u_dma_data.mva,
m4u_dma_data.eDMAType, m4u_dma_data.eDMADir);
break;
case MTK_M4U_T_CONFIG_PORT:
ret = copy_from_user(&m4u_port, (void *)arg,
sizeof(struct M4U_PORT_STRUCT));
if (ret) {
M4U_ERR("T_CONFIG_PORT,cpy failed:%d\n", ret);
return -EFAULT;
}
ret = m4u_config_port(&m4u_port);
break;
case MTK_M4U_T_MONITOR_START:
ret = copy_from_user(&PortID, (void *)arg,
sizeof(unsigned int));
if (ret) {
M4U_ERR("MONITOR_START,cpy failed,%d\n", ret);
return -EFAULT;
}
ret = 0;
break;
case MTK_M4U_T_MONITOR_STOP:
ret = copy_from_user(&PortID, (void *)arg,
sizeof(unsigned int));
if (ret) {
M4U_ERR("T_MONITOR_STOP,cpy failed,%d\n", ret);
return -EFAULT;
}
ret = 0;
break;
case MTK_M4U_T_CACHE_FLUSH_ALL:
m4u_dma_cache_flush_all();
break;
case MTK_M4U_T_CONFIG_PORT_ARRAY:
{
struct m4u_port_array port_array;
ret = copy_from_user(&port_array, (void *)arg,
sizeof(struct m4u_port_array));
if (ret) {
M4U_ERR("T_CONFIG_PORT,cpy failed:%d\n", ret);
return -EFAULT;
}
ret = m4u_config_port_array(&port_array);
}
break;
case MTK_M4U_T_CONFIG_MAU:
case MTK_M4U_T_CONFIG_TF:
break;
default:
M4U_ERR("MTK M4U ioctl:No such command!!\n");
ret = -EINVAL;
break;
}
return ret;
}
#if IS_ENABLED(CONFIG_COMPAT)
static int
compat_get_m4u_module_struct(struct COMPAT_M4U_MOUDLE_STRUCT __user *data32,
struct M4U_MOUDLE_STRUCT __user *data)
{
compat_uint_t u;
compat_ulong_t l;
int err;
err = get_user(u, &(data32->port));
err |= put_user(u, &(data->port));
err |= get_user(l, &(data32->BufAddr));
err |= put_user(l, &(data->BufAddr));
err |= get_user(u, &(data32->BufSize));
err |= put_user(u, &(data->BufSize));
err |= get_user(u, &(data32->prot));
err |= put_user(u, &(data->prot));
err |= get_user(u, &(data32->MVAStart));
err |= put_user(u, &(data->MVAStart));
err |= get_user(u, &(data32->MVAEnd));
err |= put_user(u, &(data->MVAEnd));
err |= get_user(u, &(data32->flags));
err |= put_user(u, &(data->flags));
return err;
}
static int
compat_put_m4u_module_struct(struct COMPAT_M4U_MOUDLE_STRUCT __user *data32,
struct M4U_MOUDLE_STRUCT __user *data)
{
compat_uint_t u;
compat_ulong_t l;
int err;
err = get_user(u, &(data->port));
err |= put_user(u, &(data32->port));
err |= get_user(l, &(data->BufAddr));
err |= put_user(l, &(data32->BufAddr));
err |= get_user(u, &(data->BufSize));
err |= put_user(u, &(data32->BufSize));
err |= get_user(u, &(data->prot));
err |= put_user(u, &(data32->prot));
err |= get_user(u, &(data->MVAStart));
err |= put_user(u, &(data32->MVAStart));
err |= get_user(u, &(data->MVAEnd));
err |= put_user(u, &(data32->MVAEnd));
err |= get_user(u, &(data->flags));
err |= put_user(u, &(data32->flags));
return err;
}
static int
compat_get_m4u_cache_struct(struct COMPAT_M4U_CACHE_STRUCT __user *data32,
struct M4U_CACHE_STRUCT __user *data)
{
compat_uint_t u;
compat_ulong_t l;
int err;
err = get_user(u, &(data32->port));
err |= put_user(u, &(data->port));
err |= get_user(u, &(data32->eCacheSync));
err |= put_user(u, &(data->eCacheSync));
err |= get_user(l, &(data32->va));
err |= put_user(l, &(data->va));
err |= get_user(u, &(data32->size));
err |= put_user(u, &(data->size));
err |= get_user(u, &(data32->mva));
err |= put_user(u, &(data->mva));
return err;
}
long
MTK_M4U_COMPAT_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
long ret = -ENOIOCTLCMD;
if (!filp->f_op || !filp->f_op->unlocked_ioctl)
return -ENOTTY;
switch (cmd) {
case COMPAT_MTK_M4U_T_ALLOC_MVA:
{
struct COMPAT_M4U_MOUDLE_STRUCT __user *data32;
struct M4U_MOUDLE_STRUCT __user *data;
int err;
data32 = compat_ptr(arg);
data = compat_alloc_user_space(sizeof(*data));
if (data == NULL)
return -EFAULT;
err = compat_get_m4u_module_struct(data32, data);
if (err)
return err;
ret = filp->f_op->unlocked_ioctl(filp,
MTK_M4U_T_ALLOC_MVA,
(unsigned long)data);
err = compat_put_m4u_module_struct(data32, data);
if (err)
return err;
break;
}
case COMPAT_MTK_M4U_T_DEALLOC_MVA:
{
struct COMPAT_M4U_MOUDLE_STRUCT __user *data32;
struct M4U_MOUDLE_STRUCT __user *data;
int err;
data32 = compat_ptr(arg);
data = compat_alloc_user_space(
sizeof(struct M4U_MOUDLE_STRUCT));
if (data == NULL)
return -EFAULT;
err = compat_get_m4u_module_struct(data32, data);
if (err)
return err;
ret = filp->f_op->unlocked_ioctl(filp,
MTK_M4U_T_DEALLOC_MVA,
(unsigned long)data);
break;
}
case COMPAT_MTK_M4U_T_CACHE_SYNC:
{
struct COMPAT_M4U_CACHE_STRUCT __user *data32;
struct M4U_CACHE_STRUCT __user *data;
int err;
data32 = compat_ptr(arg);
data = compat_alloc_user_space(
sizeof(struct M4U_CACHE_STRUCT));
if (data == NULL)
return -EFAULT;
err = compat_get_m4u_cache_struct(data32, data);
if (err)
return err;
ret = filp->f_op->unlocked_ioctl(filp,
MTK_M4U_T_CACHE_SYNC,
(unsigned long)data);
break;
}
case MTK_M4U_T_POWER_ON:
/* fallthrough */
case MTK_M4U_T_POWER_OFF:
/* fallthrough */
case MTK_M4U_T_DUMP_INFO:
/* fallthrough */
case MTK_M4U_T_CONFIG_PORT:
/* fallthrough */
case MTK_M4U_T_MONITOR_START:
/* fallthrough */
case MTK_M4U_T_MONITOR_STOP:
/* fallthrough */
case MTK_M4U_T_CACHE_FLUSH_ALL:
/* fallthrough */
case MTK_M4U_T_CONFIG_PORT_ARRAY:
ret = filp->f_op->unlocked_ioctl(filp, cmd,
(unsigned long)compat_ptr(arg));
break;
default:
ret = -ENOIOCTLCMD;
}
return ret;
}
#else
#define MTK_M4U_COMPAT_ioctl NULL
#endif
/***********************************************************/
/** map mva buffer to kernel va buffer
* this function should ONLY used for DEBUG
************************************************************/
int m4u_mva_map_kernel(unsigned int mva,
unsigned long size, unsigned long *map_va,
unsigned int *map_size)
{
struct m4u_buf_info_t *pMvaInfo;
struct sg_table *table;
struct scatterlist *sg;
int i, j, k, ret = 0;
struct page **pages;
unsigned int page_num;
void *kernel_va;
unsigned int kernel_size;
pMvaInfo = m4u_client_find_buf(ion_m4u_client, mva, 0);
if (!pMvaInfo || pMvaInfo->size < size) {
M4U_ERR("%s cannot find mva: mva=0x%x, size=0x%lx\n",
__func__, mva, size);
if (pMvaInfo)
M4U_ERR("pMvaInfo: mva=0x%x, size=0x%x\n",
pMvaInfo->mva, pMvaInfo->size);
return -1;
}
table = pMvaInfo->sg_table;
page_num = M4U_GET_PAGE_NUM(mva, size);
pages = vmalloc(sizeof(struct page *) * page_num);
if (pages == NULL) {
M4U_ERR("mva_map_kernel:error to vmalloc for %d\n",
(unsigned int)sizeof(struct page *) * page_num);
return -1;
}
k = 0;
for_each_sg(table->sgl, sg, table->nents, i) {
struct page *page_start;
int pages_in_this_sg = PAGE_ALIGN(sg_dma_len(sg)) / PAGE_SIZE;
#ifdef CONFIG_NEED_SG_DMA_LENGTH
if (sg_dma_address(sg) == 0)
pages_in_this_sg = PAGE_ALIGN(sg->length) / PAGE_SIZE;
#endif
page_start = sg_page(sg);
for (j = 0; j < pages_in_this_sg; j++) {
pages[k++] = page_start++;
if (k >= page_num)
goto get_pages_done;
}
}
get_pages_done:
if (k < page_num) {
/* this should not happen, because we have
* checked the size before.
*/
M4U_ERR(
"mva_map_kernel:only get %d pages: mva=0x%x, size=0x%lx, pg_num=%d\n",
k, mva, size, page_num);
ret = -1;
goto error_out;
}
kernel_va = 0;
kernel_size = 0;
kernel_va = vmap(pages, page_num, VM_MAP, PAGE_KERNEL);
if (kernel_va == 0 || (unsigned long)kernel_va & M4U_PAGE_MASK) {
M4U_ERR(
"mva_map_kernel:vmap fail: page_num=%d, kernel_va=0x%p\n",
page_num, kernel_va);
ret = -2;
goto error_out;
}
kernel_va += ((unsigned long)mva & (M4U_PAGE_MASK));
*map_va = (unsigned long)kernel_va;
*map_size = (unsigned int)size;
error_out:
vfree(pages);
M4U_DBG(
"mva_map_kernel:mva=0x%x,size=0x%lx,map_va=0x%lx,map_size=0x%x\n",
mva, size, *map_va, *map_size);
return ret;
}
EXPORT_SYMBOL(m4u_mva_map_kernel);
int m4u_mva_unmap_kernel(unsigned int mva,
unsigned long size, unsigned long map_va)
{
M4U_DBG("mva_unmap_kernel:mva=0x%x,size=0x%lx,va=0x%lx\n",
mva, size, map_va);
vunmap((void *)(map_va & (~M4U_PAGE_MASK)));
return 0;
}
EXPORT_SYMBOL(m4u_mva_unmap_kernel);
#ifndef CONFIG_ARM64
/* A64 Direct mapping is helped via iommu framework. */
static struct dma_iommu_mapping *dmapping;
static dma_addr_t __alloc_iova(struct dma_iommu_mapping *mapping,
size_t size);
static void __free_iova(struct dma_iommu_mapping *mapping,
dma_addr_t addr, size_t size);
static void dma_cache_maint_page(struct page *page, unsigned long offset,
size_t size, enum dma_data_direction dir,
void (*op)(const void *, size_t, int))
{
unsigned long pfn;
size_t left = size;
pfn = page_to_pfn(page) + offset / PAGE_SIZE;
offset %= PAGE_SIZE;
/*
* A single sg entry may refer to multiple physically contiguous
* pages. But we still need to process highmem pages individually.
* If highmem is not configured then the bulk of this loop gets
* optimized out.
*/
do {
size_t len = left;
void *vaddr;
page = pfn_to_page(pfn);
if (PageHighMem(page)) {
if (len + offset > PAGE_SIZE)
len = PAGE_SIZE - offset;
if (cache_is_vipt_nonaliasing()) {
vaddr = kmap_atomic(page);
op(vaddr + offset, len, dir);
kunmap_atomic(vaddr);
} else {
vaddr = kmap_high_get(page);
if (vaddr) {
op(vaddr + offset, len, dir);
kunmap_high(page);
}
}
} else {
vaddr = page_address(page) + offset;
op(vaddr, len, dir);
}
offset = 0;
pfn++;
left -= len;
} while (left);
}
static int __dma_direction_to_prot(enum dma_data_direction dir)
{
int prot;
switch (dir) {
case DMA_BIDIRECTIONAL:
prot = IOMMU_READ | IOMMU_WRITE;
break;
case DMA_TO_DEVICE:
prot = IOMMU_READ;
break;
case DMA_FROM_DEVICE:
prot = IOMMU_WRITE;
break;
default:
prot = 0;
}
return prot;
}
/*
* Make an area consistent for devices.
* Note: Drivers should NOT use this function directly, as it will break
* platforms with CONFIG_DMABOUNCE.
* Use the driver DMA support - see dma-mapping.h (dma_sync_*)
*/
static void __dma_page_cpu_to_dev(struct page *page, unsigned long off,
size_t size, enum dma_data_direction dir)
{
phys_addr_t paddr;
dma_cache_maint_page(page, off, size, dir, dmac_map_area);
paddr = page_to_phys(page) + off;
if (dir == DMA_FROM_DEVICE)
outer_inv_range(paddr, paddr + size);
else
outer_clean_range(paddr, paddr + size);
/* FIXME: non-speculating: flush on bidirectional mappings? */
}
static void __dma_page_dev_to_cpu(struct page *page, unsigned long off,
size_t size, enum dma_data_direction dir)
{
phys_addr_t paddr = page_to_phys(page) + off;
/* FIXME: non-speculating: not required */
/* in any case, don't bother invalidating if DMA to device */
if (dir != DMA_TO_DEVICE) {
outer_inv_range(paddr, paddr + size);
dma_cache_maint_page(page, off, size, dir, dmac_unmap_area);
}
/*
* Mark the D-cache clean for these pages to avoid extra flushing.
*/
if (dir != DMA_TO_DEVICE && size >= PAGE_SIZE) {
unsigned long pfn;
size_t left = size;
pfn = page_to_pfn(page) + off / PAGE_SIZE;
off %= PAGE_SIZE;
if (off) {
pfn++;
left -= PAGE_SIZE - off;
}
while (left >= PAGE_SIZE) {
page = pfn_to_page(pfn++);
set_bit(PG_dcache_clean, &page->flags);
left -= PAGE_SIZE;
}
}
}
static int
__iommu_remove_mapping(struct device *dev, dma_addr_t iova, size_t size)
{
struct dma_iommu_mapping *mapping = to_dma_iommu_mapping(dev);
/*
* add optional in-page offset from iova to size and align
* result to page size
*/
size = PAGE_ALIGN((iova & ~PAGE_MASK) + size);
iova &= PAGE_MASK;
iommu_unmap(mapping->domain, iova, size);
__free_iova(mapping, iova, size);
return 0;
}
/*
* Map a part of the scatter-gather list into contiguous io address space
*/
static int __map_sg_chunk(struct device *dev, struct scatterlist *sg,
size_t size, dma_addr_t *handle,
enum dma_data_direction dir, unsigned long attrs,
bool is_coherent)
{
struct dma_iommu_mapping *mapping = to_dma_iommu_mapping(dev);
dma_addr_t iova, iova_base;
int ret = 0;
unsigned int count;
struct scatterlist *s;
int prot;
size = PAGE_ALIGN(size);
iova_base = iova = __alloc_iova(mapping, size);
if (iova == ARM_MAPPING_ERROR)
return -ENOMEM;
for (count = 0, s = sg; count < (size >> PAGE_SHIFT); s = sg_next(s)) {
phys_addr_t phys;
unsigned int len;
/* for some pa do not have struct pages, we get the pa from
* sg_dma_address.
* we have set the iova to ARM_MAPPING_ERROR in __iommu_map_sg
* for which have pages
*/
if (!sg_dma_address(s) || sg_dma_address(s) == ARM_MAPPING_ERROR
|| !sg_dma_len(s)) {
phys = page_to_phys(sg_page(s));
len = PAGE_ALIGN(s->offset + s->length);
} else {
phys = sg_dma_address(s);
len = sg_dma_len(s);
/* clear the dma address after we get the pa. */
sg_dma_address(s) = ARM_MAPPING_ERROR;
sg_dma_len(s) = 0;
}
if (!is_coherent &&
(attrs & DMA_ATTR_SKIP_CPU_SYNC) == 0
&& (sg_page(s)))
__dma_page_cpu_to_dev(sg_page(s), s->offset,
s->length, dir);
prot = __dma_direction_to_prot(dir);
ret = iommu_map(mapping->domain, iova, phys, len, prot);
if (ret < 0)
goto fail;
count += len >> PAGE_SHIFT;
iova += len;
}
*handle = iova_base;
return 0;
fail:
*handle = ARM_MAPPING_ERROR;
iommu_unmap(mapping->domain, iova_base, count * PAGE_SIZE);
__free_iova(mapping, iova_base, size);
return ret;
}
static int __iommu_map_sg(struct device *dev, struct scatterlist *sg, int nents,
enum dma_data_direction dir, unsigned long attrs,
bool is_coherent)
{
struct scatterlist *s = sg, *dma = sg, *start = sg;
int i, count = 0;
unsigned int offset = s->offset;
unsigned int size = s->offset + s->length;
unsigned int max = dma_get_max_seg_size(dev);
for (i = 1; i < nents; i++) {
s = sg_next(s);
/*
* this is for pseudo m4u driver user, since some user space
* memory do not have struct pages, and we need to store the pa
* in sg->dma_address, this is to avoid the dma to modify this
* value.
*/
if (!sg_dma_address(s) || !sg_dma_len(s)) {
sg_dma_address(s) = ARM_MAPPING_ERROR;
sg_dma_len(s) = 0;
}
if (s->offset || (size & ~PAGE_MASK) ||
size + s->length > max) {
if (__map_sg_chunk(dev, start, size, &dma->dma_address,
dir, attrs, is_coherent) < 0)
goto bad_mapping;
dma->dma_address += offset;
dma->dma_length = size - offset;
size = offset = s->offset;
start = s;
dma = sg_next(dma);
count += 1;
}
if ((sg_dma_address(s)) &&
(sg_dma_address(s) != ARM_MAPPING_ERROR) &&
(sg_dma_len(s)))
size += sg_dma_len(s);
else
size += s->length;
}
/* map sg chunk would leave the last page if address is page aligned */
if ((sg_dma_address(s)) &&
(sg_dma_address(s) != ARM_MAPPING_ERROR) && (sg_dma_len(s))) {
size += PAGE_SIZE;
/*
* Add on plus page size to make sure th map and unmap would
* reach the end
*/
/*sg_dma_len(s) += PAGE_SIZE;*/
}
if (__map_sg_chunk(dev, start, size, &dma->dma_address, dir, attrs,
is_coherent) < 0)
goto bad_mapping;
dma->dma_address += offset;
dma->dma_length = size - offset;
return count+1;
bad_mapping:
for_each_sg(sg, s, count, i)
__iommu_remove_mapping(dev, sg_dma_address(s), sg_dma_len(s));
/* tell the pseudo driver that the map have been failed. */
if (sg_dma_address(sg) && sg_dma_len(sg)) {
sg_dma_address(sg) = ARM_MAPPING_ERROR;
sg_dma_len(sg) = 0;
}
return 0;
}
/**
* arm_coherent_iommu_map_sg - map a set of SG buffers for streaming mode DMA
* @dev: valid struct device pointer
* @sg: list of buffers
* @nents: number of buffers to map
* @dir: DMA transfer direction
*
* Map a set of i/o coherent buffers described by scatterlist in streaming
* mode for DMA. The scatter gather list elements are merged together (if
* possible) and tagged with the appropriate dma address and length. They are
* obtained via sg_dma_{address,length}.
*/
int __arm_coherent_iommu_map_sg(struct device *dev, struct scatterlist *sg,
int nents, enum dma_data_direction dir, unsigned long attrs)
{
return __iommu_map_sg(dev, sg, nents, dir, attrs, true);
}
static void __iommu_unmap_sg(struct device *dev, struct scatterlist *sg,
int nents, enum dma_data_direction dir, unsigned long attrs,
bool is_coherent)
{
struct scatterlist *s;
int i;
for_each_sg(sg, s, nents, i) {
if (sg_dma_len(s))
__iommu_remove_mapping(dev, sg_dma_address(s),
sg_dma_len(s));
if (!is_coherent &&
(attrs & DMA_ATTR_SKIP_CPU_SYNC) == 0 && (sg_page(s)))
__dma_page_dev_to_cpu(sg_page(s), s->offset,
s->length, dir);
}
}
/**
* arm_coherent_iommu_unmap_sg - unmap a set of SG buffers mapped by dma_map_sg
* @dev: valid struct device pointer
* @sg: list of buffers
* @nents: number of buffers to unmap (same as was passed to dma_map_sg)
* @dir: DMA transfer direction (same as was passed to dma_map_sg)
*
* Unmap a set of streaming mode DMA translations. Again, CPU access
* rules concerning calls here are the same as for dma_unmap_single().
*/
void __arm_coherent_iommu_unmap_sg(struct device *dev, struct scatterlist *sg,
int nents, enum dma_data_direction dir, unsigned long attrs)
{
__iommu_unmap_sg(dev, sg, nents, dir, attrs, true);
}
static int __extend_iommu_mapping(struct dma_iommu_mapping *mapping)
{
int next_bitmap;
if (mapping->nr_bitmaps >= mapping->extensions)
return -EINVAL;
next_bitmap = mapping->nr_bitmaps;
mapping->bitmaps[next_bitmap] = kzalloc(mapping->bitmap_size,
GFP_ATOMIC);
if (!mapping->bitmaps[next_bitmap])
return -ENOMEM;
mapping->nr_bitmaps++;
return 0;
}
static dma_addr_t __alloc_iova(struct dma_iommu_mapping *mapping,
size_t size)
{
unsigned int order = get_order(size);
unsigned int align = 0;
unsigned int count, start;
size_t mapping_size = mapping->bits << PAGE_SHIFT;
unsigned long flags;
dma_addr_t iova;
int i;
if (order > CONFIG_ARM_DMA_IOMMU_ALIGNMENT)
order = CONFIG_ARM_DMA_IOMMU_ALIGNMENT;
count = PAGE_ALIGN(size) >> PAGE_SHIFT;
align = (1 << order) - 1;
spin_lock_irqsave(&mapping->lock, flags);
for (i = 0; i < mapping->nr_bitmaps; i++) {
start = bitmap_find_next_zero_area(mapping->bitmaps[i],
mapping->bits, 0, count, align);
if (start > mapping->bits)
continue;
bitmap_set(mapping->bitmaps[i], start, count);
break;
}
/*
* No unused range found. Try to extend the existing mapping
* and perform a second attempt to reserve an IO virtual
* address range of size bytes.
*/
if (i == mapping->nr_bitmaps) {
if (__extend_iommu_mapping(mapping)) {
spin_unlock_irqrestore(&mapping->lock, flags);
return ARM_MAPPING_ERROR;
}
start = bitmap_find_next_zero_area(mapping->bitmaps[i],
mapping->bits, 0, count, align);
if (start > mapping->bits) {
spin_unlock_irqrestore(&mapping->lock, flags);
return ARM_MAPPING_ERROR;
}
bitmap_set(mapping->bitmaps[i], start, count);
}
spin_unlock_irqrestore(&mapping->lock, flags);
iova = mapping->base + (mapping_size * i);
iova += start << PAGE_SHIFT;
return iova;
}
static void __free_iova(struct dma_iommu_mapping *mapping,
dma_addr_t addr, size_t size)
{
unsigned int start, count;
size_t mapping_size = mapping->bits << PAGE_SHIFT;
unsigned long flags;
dma_addr_t bitmap_base;
u32 bitmap_index;
if (!size)
return;
bitmap_index = (u32) (addr - mapping->base) / (u32) mapping_size;
WARN_ON(addr < mapping->base || bitmap_index > mapping->extensions);
bitmap_base = mapping->base + mapping_size * bitmap_index;
start = (addr - bitmap_base) >> PAGE_SHIFT;
if (addr + size > bitmap_base + mapping_size) {
/*
* The address range to be freed reaches into the iova
* range of the next bitmap. This should not happen as
* we don't allow this in __alloc_iova (at the
* moment).
*/
WARN_ON(1);
return;
}
count = size >> PAGE_SHIFT;
spin_lock_irqsave(&mapping->lock, flags);
bitmap_clear(mapping->bitmaps[bitmap_index], start, count);
spin_unlock_irqrestore(&mapping->lock, flags);
}
#endif
#ifdef M4U_TEE_SERVICE_ENABLE
unsigned int mtk_init_tz_m4u(void)
{
/* init the sec_mem_size to 400M to avoid build error. */
static unsigned int sec_mem_size = 400 * 0x100000;
static unsigned int tz_m4u_inited;
/*reserve mva range for sec */
int gM4U_L2_enable = 1;
if (tz_m4u_inited)
return sec_mem_size;
pseudo_m4u_session_init();
pseudo_m4u_sec_init(0, gM4U_L2_enable, &sec_mem_size);
tz_m4u_inited = 1;
return sec_mem_size;
}
#endif
static const struct file_operations g_stMTK_M4U_fops = {
.owner = THIS_MODULE,
.open = MTK_M4U_open,
.release = MTK_M4U_release,
.flush = MTK_M4U_flush,
.unlocked_ioctl = MTK_M4U_ioctl,
.compat_ioctl = MTK_M4U_COMPAT_ioctl,
};
/*
* Here's something need to be done in probe, we should get the following
* information from dts
* 1. get the reserved memory range for fb buffer and sec trustzone mva range
* 2. get the larb port device for attach device in order to config m4u port
*/
/*
* iommus = <&iommu portid>
*/
static int pseudo_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
#ifndef CONFIG_ARM64
struct device_node *node = dev->of_node;
struct platform_device *pimudev;
node = of_parse_phandle(pdev->dev.of_node, "iommus", 0);
if (!node)
return 0;
pimudev = of_find_device_by_node(node);
of_node_put(node);
if (WARN_ON(!pimudev))
return -EINVAL;
dmapping = pimudev->dev.archdata.iommu;
WARN_ON(!dmapping);
#endif
{
struct device_dma_parameters *dma_param;
/* dma will split the iova into max size to 65535 byte by
* default if we do not set this.
*/
dma_param = devm_kzalloc(dev, sizeof(*dma_param), GFP_KERNEL);
if (!dma_param)
return -ENOMEM;
/* set the iova to 256MB for one time map, this should be
* suffice for ION
*/
dma_param->max_segment_size = 0x10000000;
dev = &pdev->dev;
dev->dma_parms = dma_param;
}
gM4uDev = kzalloc(sizeof(struct m4u_device), GFP_KERNEL);
if (!gM4uDev)
return -ENOMEM;
gM4uDev->m4u_dev_proc_entry = proc_create("m4u", 0444, NULL,
&g_stMTK_M4U_fops);
if (!gM4uDev->m4u_dev_proc_entry) {
M4U_ERR("proc m4u create error\n");
return -ENODEV;
}
m4u_cache_sync_init();
pseudo_m4u_dev = &pdev->dev;
return 0;
}
static int pseudo_remove(struct platform_device *pdev)
{
return 0;
}
static int pseudo_suspend(struct platform_device *pdev, pm_message_t mesg)
{
#ifdef M4U_TEE_SERVICE_ENABLE
smi_reg_backup_sec();
#endif
return 0;
}
static int pseudo_resume(struct platform_device *pdev)
{
#ifdef M4U_TEE_SERVICE_ENABLE
smi_reg_restore_sec();
#endif
return 0;
}
#ifdef CONFIG_COMPAT
struct MTK_SMI_COMPAT_BWC_CONFIG {
compat_int_t scenario;
compat_int_t b_on_off;
};
#define COMPAT_MTK_IOC_SMI_BWC_CONFIG \
MTK_IOW(24, struct MTK_SMI_COMPAT_BWC_CONFIG)
static int
compat_get_smi_bwc_config_struct(
struct MTK_SMI_COMPAT_BWC_CONFIG __user *data32,
struct MTK_SMI_BWC_CONFIG __user *data)
{
compat_int_t i;
int err;
err = get_user(i, &(data32->scenario));
err |= put_user(i, &(data->scenario));
err |= get_user(i, &(data32->b_on_off));
err |= put_user(i, &(data->b_on_off));
return err;
}
static long
MTK_SMI_COMPAT_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
long ret = 0;
if (!filp->f_op || !filp->f_op->unlocked_ioctl)
return -ENOTTY;
switch (cmd) {
case COMPAT_MTK_IOC_SMI_BWC_CONFIG:
{
if (COMPAT_MTK_IOC_SMI_BWC_CONFIG ==
MTK_IOC_SMI_BWC_CONFIG) {
return filp->f_op->unlocked_ioctl(
filp, cmd,
(unsigned long)compat_ptr(arg));
} else {
struct MTK_SMI_COMPAT_BWC_CONFIG __user *data32;
struct MTK_SMI_BWC_CONFIG __user *data;
int err;
data32 = compat_ptr(arg);
data = compat_alloc_user_space(
sizeof(struct MTK_SMI_BWC_CONFIG));
if (data == NULL)
return -EFAULT;
err = compat_get_smi_bwc_config_struct(data32,
data);
if (err)
return err;
ret = filp->f_op->unlocked_ioctl(filp,
MTK_IOC_SMI_BWC_CONFIG,
(unsigned long)data);
return ret;
}
}
break;
case MTK_IOC_SMI_DUMP_LARB:
case MTK_IOC_SMI_DUMP_COMMON:
case MTK_IOC_MMDVFS_CMD:
return filp->f_op->unlocked_ioctl(filp, cmd,
(unsigned long)compat_ptr(arg));
default:
return -ENOIOCTLCMD;
}
return ret;
}
#else
#define MTK_SMI_COMPAT_ioctl NULL
#endif
static int
smi_bwc_config(struct MTK_SMI_BWC_CONFIG *p_conf, unsigned int *pu4LocalCnt)
{
int scenario = p_conf->scenario;
/* Bandwidth Limiter */
switch (scenario) {
case SMI_BWC_SCEN_VP:
case SMI_BWC_SCEN_VP_4KOSD:
case SMI_BWC_SCEN_SWDEC_VP: {
bool osd_4k = !!(scenario == SMI_BWC_SCEN_VP_4KOSD);
if (p_conf->b_on_off)
mtk_smi_vp_setting(osd_4k);
else
mtk_smi_init_setting();
} break;
case SMI_BWC_SCEN_VR:
case SMI_BWC_SCEN_VR_SLOW:
case SMI_BWC_SCEN_VENC:
case SMI_BWC_SCEN_NORMAL:
mtk_smi_init_setting();
break;
case SMI_BWC_SCEN_MM_GPU:
break;
default:
mtk_smi_init_setting();
break;
}
return 0;
}
static int smi_open(struct inode *inode, struct file *file)
{
file->private_data = kmalloc_array(SMI_BWC_SCEN_CNT,
sizeof(unsigned int), GFP_ATOMIC);
if (file->private_data == NULL)
return -ENOMEM;
memset(file->private_data, 0, SMI_BWC_SCEN_CNT * sizeof(unsigned int));
return 0;
}
static int smi_release(struct inode *inode, struct file *file)
{
if (file->private_data != NULL) {
kfree(file->private_data);
file->private_data = NULL;
}
return 0;
}
static long smi_ioctl(struct file *pFile, unsigned int cmd, unsigned long param)
{
int ret = 0;
switch (cmd) {
case MTK_IOC_SMI_BWC_CONFIG:
{
struct MTK_SMI_BWC_CONFIG cfg;
ret = copy_from_user(&cfg, (void *)param,
sizeof(struct MTK_SMI_BWC_CONFIG));
if (ret) {
pr_err("SMI_BWC_CONFIG, cpy failed: %d\n", ret);
return -EFAULT;
}
ret = smi_bwc_config(&cfg, NULL);
}
break;
case MTK_IOC_SMI_BWC_INFO_SET:
case MTK_IOC_SMI_BWC_INFO_GET:
case MTK_IOC_SMI_DUMP_LARB:
case MTK_IOC_SMI_DUMP_COMMON:
pr_debug("smi ioctl: those command does not support anymore\n");
break;
default:
return -1;
}
return ret;
}
static const struct file_operations smi_fops = {
.owner = THIS_MODULE,
.open = smi_open,
.release = smi_release,
.unlocked_ioctl = smi_ioctl,
.compat_ioctl = MTK_SMI_COMPAT_ioctl
};
static dev_t smi_dev_no = MKDEV(MTK_SMI_MAJOR_NUMBER, 0);
static inline int smi_register(void)
{
struct cdev *psmidev;
if (alloc_chrdev_region(&smi_dev_no, 0, 1, "MTK_SMI")) {
pr_err("Allocate device No. failed");
return -EAGAIN;
}
/* Allocate driver */
psmidev = cdev_alloc();
if (psmidev == NULL) {
unregister_chrdev_region(smi_dev_no, 1);
pr_err("Allocate mem for kobject failed");
return -ENOMEM;
}
/* Attatch file operation. */
cdev_init(psmidev, &smi_fops);
psmidev->owner = THIS_MODULE;
/* Add to system */
if (cdev_add(psmidev, smi_dev_no, 1)) {
pr_err("Attatch file operation failed");
unregister_chrdev_region(smi_dev_no, 1);
return -EAGAIN;
}
return 0;
}
static struct class *psmi_class;
static int smi_dev_register(void)
{
int ret;
struct device *smidevice = NULL;
if (smi_register()) {
pr_err("register SMI failed\n");
return -EAGAIN;
}
psmi_class = class_create(THIS_MODULE, "MTK_SMI");
if (IS_ERR(psmi_class)) {
ret = PTR_ERR(psmi_class);
pr_err("Unable to create class, err = %d", ret);
return ret;
}
smidevice = device_create(psmi_class, NULL, smi_dev_no,
NULL, "MTK_SMI");
return 0;
}
static int __init smi_init(void)
{
return smi_dev_register();
}
static struct platform_driver pseudo_driver = {
.probe = pseudo_probe,
.remove = pseudo_remove,
.suspend = pseudo_suspend,
.resume = pseudo_resume,
.driver = {
.name = "pseudo-m4u",
.of_match_table = mtk_pseudo_of_ids,
.owner = THIS_MODULE,
}
};
static int __init mtk_pseudo_init(void)
{
if (platform_driver_register(&pseudo_driver)) {
M4U_ERR("failed to register pseudo driver");
return -ENODEV;
}
if (smi_init()) {
M4U_ERR("smi bwc init failed\n");
return -EINVAL;
}
return 0;
}
static void __exit mtk_pseudo_exit(void)
{
platform_driver_unregister(&pseudo_driver);
}
module_init(mtk_pseudo_init);
module_exit(mtk_pseudo_exit);
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