* @params: parameters to the command
*/
struct smem_proc_comm {
- u32 command;
- u32 status;
- u32 params[2];
+ __le32 command;
+ __le32 status;
+ __le32 params[2];
};
/**
* the default region. bits 0,1 are reserved
*/
struct smem_global_entry {
- u32 allocated;
- u32 offset;
- u32 size;
- u32 aux_base; /* bits 1:0 reserved */
+ __le32 allocated;
+ __le32 offset;
+ __le32 size;
+ __le32 aux_base; /* bits 1:0 reserved */
};
#define AUX_BASE_MASK 0xfffffffc
*/
struct smem_header {
struct smem_proc_comm proc_comm[4];
- u32 version[32];
- u32 initialized;
- u32 free_offset;
- u32 available;
- u32 reserved;
+ __le32 version[32];
+ __le32 initialized;
+ __le32 free_offset;
+ __le32 available;
+ __le32 reserved;
struct smem_global_entry toc[SMEM_ITEM_COUNT];
};
* @reserved: reserved entries for later use
*/
struct smem_ptable_entry {
- u32 offset;
- u32 size;
- u32 flags;
- u16 host0;
- u16 host1;
- u32 reserved[8];
+ __le32 offset;
+ __le32 size;
+ __le32 flags;
+ __le16 host0;
+ __le16 host1;
+ __le32 reserved[8];
};
/**
* @entry: list of @smem_ptable_entry for the @num_entries partitions
*/
struct smem_ptable {
- u32 magic;
- u32 version;
- u32 num_entries;
- u32 reserved[5];
+ u8 magic[4];
+ __le32 version;
+ __le32 num_entries;
+ __le32 reserved[5];
struct smem_ptable_entry entry[];
};
-#define SMEM_PTABLE_MAGIC 0x434f5424 /* "$TOC" */
+
+static const u8 SMEM_PTABLE_MAGIC[] = { 0x24, 0x54, 0x4f, 0x43 }; /* "$TOC" */
/**
* struct smem_partition_header - header of the partitions
* @reserved: for now reserved entries
*/
struct smem_partition_header {
- u32 magic;
- u16 host0;
- u16 host1;
- u32 size;
- u32 offset_free_uncached;
- u32 offset_free_cached;
- u32 reserved[3];
+ u8 magic[4];
+ __le16 host0;
+ __le16 host1;
+ __le32 size;
+ __le32 offset_free_uncached;
+ __le32 offset_free_cached;
+ __le32 reserved[3];
};
-#define SMEM_PART_MAGIC 0x54525024 /* "$PRT" */
+
+static const u8 SMEM_PART_MAGIC[] = { 0x24, 0x50, 0x52, 0x54 };
/**
* struct smem_private_entry - header of each item in the private partition
* @reserved: for now reserved entry
*/
struct smem_private_entry {
- u16 canary;
- u16 item;
- u32 size; /* includes padding bytes */
- u16 padding_data;
- u16 padding_hdr;
- u32 reserved;
+ u16 canary; /* bytes are the same so no swapping needed */
+ __le16 item;
+ __le32 size; /* includes padding bytes */
+ __le16 padding_data;
+ __le16 padding_hdr;
+ __le32 reserved;
};
#define SMEM_PRIVATE_CANARY 0xa5a5
struct smem_region regions[0];
};
+static struct smem_private_entry *
+phdr_to_last_private_entry(struct smem_partition_header *phdr)
+{
+ void *p = phdr;
+
+ return p + le32_to_cpu(phdr->offset_free_uncached);
+}
+
+static void *phdr_to_first_cached_entry(struct smem_partition_header *phdr)
+{
+ void *p = phdr;
+
+ return p + le32_to_cpu(phdr->offset_free_cached);
+}
+
+static struct smem_private_entry *
+phdr_to_first_private_entry(struct smem_partition_header *phdr)
+{
+ void *p = phdr;
+
+ return p + sizeof(*phdr);
+}
+
+static struct smem_private_entry *
+private_entry_next(struct smem_private_entry *e)
+{
+ void *p = e;
+
+ return p + sizeof(*e) + le16_to_cpu(e->padding_hdr) +
+ le32_to_cpu(e->size);
+}
+
+static void *entry_to_item(struct smem_private_entry *e)
+{
+ void *p = e;
+
+ return p + sizeof(*e) + le16_to_cpu(e->padding_hdr);
+}
+
/* Pointer to the one and only smem handle */
static struct qcom_smem *__smem;
size_t size)
{
struct smem_partition_header *phdr;
- struct smem_private_entry *hdr;
+ struct smem_private_entry *hdr, *end;
size_t alloc_size;
- void *p;
+ void *cached;
phdr = smem->partitions[host];
+ hdr = phdr_to_first_private_entry(phdr);
+ end = phdr_to_last_private_entry(phdr);
+ cached = phdr_to_first_cached_entry(phdr);
- p = (void *)phdr + sizeof(*phdr);
- while (p < (void *)phdr + phdr->offset_free_uncached) {
- hdr = p;
-
+ while (hdr < end) {
if (hdr->canary != SMEM_PRIVATE_CANARY) {
dev_err(smem->dev,
"Found invalid canary in host %d partition\n",
return -EINVAL;
}
- if (hdr->item == item)
+ if (le16_to_cpu(hdr->item) == item)
return -EEXIST;
- p += sizeof(*hdr) + hdr->padding_hdr + hdr->size;
+ hdr = private_entry_next(hdr);
}
/* Check that we don't grow into the cached region */
alloc_size = sizeof(*hdr) + ALIGN(size, 8);
- if (p + alloc_size >= (void *)phdr + phdr->offset_free_cached) {
+ if ((void *)hdr + alloc_size >= cached) {
dev_err(smem->dev, "Out of memory\n");
return -ENOSPC;
}
- hdr = p;
hdr->canary = SMEM_PRIVATE_CANARY;
- hdr->item = item;
- hdr->size = ALIGN(size, 8);
- hdr->padding_data = hdr->size - size;
+ hdr->item = cpu_to_le16(item);
+ hdr->size = cpu_to_le32(ALIGN(size, 8));
+ hdr->padding_data = cpu_to_le16(le32_to_cpu(hdr->size) - size);
hdr->padding_hdr = 0;
/*
* gets a consistent view of the linked list.
*/
wmb();
- phdr->offset_free_uncached += alloc_size;
+ le32_add_cpu(&phdr->offset_free_uncached, alloc_size);
return 0;
}
return -EEXIST;
size = ALIGN(size, 8);
- if (WARN_ON(size > header->available))
+ if (WARN_ON(size > le32_to_cpu(header->available)))
return -ENOMEM;
entry->offset = header->free_offset;
- entry->size = size;
+ entry->size = cpu_to_le32(size);
/*
* Ensure the header is consistent before we mark the item allocated,
* even though they do not take the spinlock on read.
*/
wmb();
- entry->allocated = 1;
+ entry->allocated = cpu_to_le32(1);
- header->free_offset += size;
- header->available -= size;
+ le32_add_cpu(&header->free_offset, size);
+ le32_add_cpu(&header->available, -size);
return 0;
}
}
EXPORT_SYMBOL(qcom_smem_alloc);
-static int qcom_smem_get_global(struct qcom_smem *smem,
- unsigned item,
- void **ptr,
- size_t *size)
+static void *qcom_smem_get_global(struct qcom_smem *smem,
+ unsigned item,
+ size_t *size)
{
struct smem_header *header;
struct smem_region *area;
unsigned i;
if (WARN_ON(item >= SMEM_ITEM_COUNT))
- return -EINVAL;
+ return ERR_PTR(-EINVAL);
header = smem->regions[0].virt_base;
entry = &header->toc[item];
if (!entry->allocated)
- return -ENXIO;
+ return ERR_PTR(-ENXIO);
- if (ptr != NULL) {
- aux_base = entry->aux_base & AUX_BASE_MASK;
+ aux_base = le32_to_cpu(entry->aux_base) & AUX_BASE_MASK;
- for (i = 0; i < smem->num_regions; i++) {
- area = &smem->regions[i];
+ for (i = 0; i < smem->num_regions; i++) {
+ area = &smem->regions[i];
- if (area->aux_base == aux_base || !aux_base) {
- *ptr = area->virt_base + entry->offset;
- break;
- }
+ if (area->aux_base == aux_base || !aux_base) {
+ if (size != NULL)
+ *size = le32_to_cpu(entry->size);
+ return area->virt_base + le32_to_cpu(entry->offset);
}
}
- if (size != NULL)
- *size = entry->size;
- return 0;
+ return ERR_PTR(-ENOENT);
}
-static int qcom_smem_get_private(struct qcom_smem *smem,
- unsigned host,
- unsigned item,
- void **ptr,
- size_t *size)
+static void *qcom_smem_get_private(struct qcom_smem *smem,
+ unsigned host,
+ unsigned item,
+ size_t *size)
{
struct smem_partition_header *phdr;
- struct smem_private_entry *hdr;
- void *p;
+ struct smem_private_entry *e, *end;
phdr = smem->partitions[host];
+ e = phdr_to_first_private_entry(phdr);
+ end = phdr_to_last_private_entry(phdr);
- p = (void *)phdr + sizeof(*phdr);
- while (p < (void *)phdr + phdr->offset_free_uncached) {
- hdr = p;
-
- if (hdr->canary != SMEM_PRIVATE_CANARY) {
+ while (e < end) {
+ if (e->canary != SMEM_PRIVATE_CANARY) {
dev_err(smem->dev,
"Found invalid canary in host %d partition\n",
host);
- return -EINVAL;
+ return ERR_PTR(-EINVAL);
}
- if (hdr->item == item) {
- if (ptr != NULL)
- *ptr = p + sizeof(*hdr) + hdr->padding_hdr;
-
+ if (le16_to_cpu(e->item) == item) {
if (size != NULL)
- *size = hdr->size - hdr->padding_data;
+ *size = le32_to_cpu(e->size) -
+ le16_to_cpu(e->padding_data);
- return 0;
+ return entry_to_item(e);
}
- p += sizeof(*hdr) + hdr->padding_hdr + hdr->size;
+ e = private_entry_next(e);
}
- return -ENOENT;
+ return ERR_PTR(-ENOENT);
}
/**
* qcom_smem_get() - resolve ptr of size of a smem item
* @host: the remote processor, or -1
* @item: smem item handle
- * @ptr: pointer to be filled out with address of the item
* @size: pointer to be filled out with size of the item
*
- * Looks up pointer and size of a smem item.
+ * Looks up smem item and returns pointer to it. Size of smem
+ * item is returned in @size.
*/
-int qcom_smem_get(unsigned host, unsigned item, void **ptr, size_t *size)
+void *qcom_smem_get(unsigned host, unsigned item, size_t *size)
{
unsigned long flags;
int ret;
+ void *ptr = ERR_PTR(-EPROBE_DEFER);
if (!__smem)
- return -EPROBE_DEFER;
+ return ptr;
ret = hwspin_lock_timeout_irqsave(__smem->hwlock,
HWSPINLOCK_TIMEOUT,
&flags);
if (ret)
- return ret;
+ return ERR_PTR(ret);
if (host < SMEM_HOST_COUNT && __smem->partitions[host])
- ret = qcom_smem_get_private(__smem, host, item, ptr, size);
+ ptr = qcom_smem_get_private(__smem, host, item, size);
else
- ret = qcom_smem_get_global(__smem, item, ptr, size);
+ ptr = qcom_smem_get_global(__smem, item, size);
hwspin_unlock_irqrestore(__smem->hwlock, &flags);
- return ret;
+
+ return ptr;
}
EXPORT_SYMBOL(qcom_smem_get);
if (host < SMEM_HOST_COUNT && __smem->partitions[host]) {
phdr = __smem->partitions[host];
- ret = phdr->offset_free_cached - phdr->offset_free_uncached;
+ ret = le32_to_cpu(phdr->offset_free_cached) -
+ le32_to_cpu(phdr->offset_free_uncached);
} else {
header = __smem->regions[0].virt_base;
- ret = header->available;
+ ret = le32_to_cpu(header->available);
}
return ret;
static int qcom_smem_get_sbl_version(struct qcom_smem *smem)
{
- unsigned *versions;
+ __le32 *versions;
size_t size;
- int ret;
- ret = qcom_smem_get_global(smem, SMEM_ITEM_VERSION,
- (void **)&versions, &size);
- if (ret < 0) {
+ versions = qcom_smem_get_global(smem, SMEM_ITEM_VERSION, &size);
+ if (IS_ERR(versions)) {
dev_err(smem->dev, "Unable to read the version item\n");
return -ENOENT;
}
return -EINVAL;
}
- return versions[SMEM_MASTER_SBL_VERSION_INDEX];
+ return le32_to_cpu(versions[SMEM_MASTER_SBL_VERSION_INDEX]);
}
static int qcom_smem_enumerate_partitions(struct qcom_smem *smem,
struct smem_ptable_entry *entry;
struct smem_ptable *ptable;
unsigned remote_host;
+ u32 version, host0, host1;
int i;
ptable = smem->regions[0].virt_base + smem->regions[0].size - SZ_4K;
- if (ptable->magic != SMEM_PTABLE_MAGIC)
+ if (memcmp(ptable->magic, SMEM_PTABLE_MAGIC, sizeof(ptable->magic)))
return 0;
- if (ptable->version != 1) {
+ version = le32_to_cpu(ptable->version);
+ if (version != 1) {
dev_err(smem->dev,
- "Unsupported partition header version %d\n",
- ptable->version);
+ "Unsupported partition header version %d\n", version);
return -EINVAL;
}
- for (i = 0; i < ptable->num_entries; i++) {
+ for (i = 0; i < le32_to_cpu(ptable->num_entries); i++) {
entry = &ptable->entry[i];
+ host0 = le16_to_cpu(entry->host0);
+ host1 = le16_to_cpu(entry->host1);
- if (entry->host0 != local_host && entry->host1 != local_host)
+ if (host0 != local_host && host1 != local_host)
continue;
- if (!entry->offset)
+ if (!le32_to_cpu(entry->offset))
continue;
- if (!entry->size)
+ if (!le32_to_cpu(entry->size))
continue;
- if (entry->host0 == local_host)
- remote_host = entry->host1;
+ if (host0 == local_host)
+ remote_host = host1;
else
- remote_host = entry->host0;
+ remote_host = host0;
if (remote_host >= SMEM_HOST_COUNT) {
dev_err(smem->dev,
return -EINVAL;
}
- header = smem->regions[0].virt_base + entry->offset;
+ header = smem->regions[0].virt_base + le32_to_cpu(entry->offset);
+ host0 = le16_to_cpu(header->host0);
+ host1 = le16_to_cpu(header->host1);
- if (header->magic != SMEM_PART_MAGIC) {
+ if (memcmp(header->magic, SMEM_PART_MAGIC,
+ sizeof(header->magic))) {
dev_err(smem->dev,
"Partition %d has invalid magic\n", i);
return -EINVAL;
}
- if (header->host0 != local_host && header->host1 != local_host) {
+ if (host0 != local_host && host1 != local_host) {
dev_err(smem->dev,
"Partition %d hosts are invalid\n", i);
return -EINVAL;
}
- if (header->host0 != remote_host && header->host1 != remote_host) {
+ if (host0 != remote_host && host1 != remote_host) {
dev_err(smem->dev,
"Partition %d hosts are invalid\n", i);
return -EINVAL;
return -EINVAL;
}
- if (header->offset_free_uncached > header->size) {
+ if (le32_to_cpu(header->offset_free_uncached) > le32_to_cpu(header->size)) {
dev_err(smem->dev,
"Partition %d has invalid free pointer\n", i);
return -EINVAL;
return 0;
}
-static int qcom_smem_count_mem_regions(struct platform_device *pdev)
+static int qcom_smem_map_memory(struct qcom_smem *smem, struct device *dev,
+ const char *name, int i)
{
- struct resource *res;
- int num_regions = 0;
- int i;
-
- for (i = 0; i < pdev->num_resources; i++) {
- res = &pdev->resource[i];
+ struct device_node *np;
+ struct resource r;
+ int ret;
- if (resource_type(res) == IORESOURCE_MEM)
- num_regions++;
+ np = of_parse_phandle(dev->of_node, name, 0);
+ if (!np) {
+ dev_err(dev, "No %s specified\n", name);
+ return -EINVAL;
}
- return num_regions;
+ ret = of_address_to_resource(np, 0, &r);
+ of_node_put(np);
+ if (ret)
+ return ret;
+
+ smem->regions[i].aux_base = (u32)r.start;
+ smem->regions[i].size = resource_size(&r);
+ smem->regions[i].virt_base = devm_ioremap_nocache(dev, r.start,
+ resource_size(&r));
+ if (!smem->regions[i].virt_base)
+ return -ENOMEM;
+
+ return 0;
}
static int qcom_smem_probe(struct platform_device *pdev)
{
struct smem_header *header;
- struct device_node *np;
struct qcom_smem *smem;
- struct resource *res;
- struct resource r;
size_t array_size;
- int num_regions = 0;
+ int num_regions;
int hwlock_id;
u32 version;
int ret;
- int i;
- num_regions = qcom_smem_count_mem_regions(pdev) + 1;
+ num_regions = 1;
+ if (of_find_property(pdev->dev.of_node, "qcom,rpm-msg-ram", NULL))
+ num_regions++;
array_size = num_regions * sizeof(struct smem_region);
smem = devm_kzalloc(&pdev->dev, sizeof(*smem) + array_size, GFP_KERNEL);
smem->dev = &pdev->dev;
smem->num_regions = num_regions;
- np = of_parse_phandle(pdev->dev.of_node, "memory-region", 0);
- if (!np) {
- dev_err(&pdev->dev, "No memory-region specified\n");
- return -EINVAL;
- }
-
- ret = of_address_to_resource(np, 0, &r);
- of_node_put(np);
+ ret = qcom_smem_map_memory(smem, &pdev->dev, "memory-region", 0);
if (ret)
return ret;
- smem->regions[0].aux_base = (u32)r.start;
- smem->regions[0].size = resource_size(&r);
- smem->regions[0].virt_base = devm_ioremap_nocache(&pdev->dev,
- r.start,
- resource_size(&r));
- if (!smem->regions[0].virt_base)
- return -ENOMEM;
-
- for (i = 1; i < num_regions; i++) {
- res = platform_get_resource(pdev, IORESOURCE_MEM, i - 1);
-
- smem->regions[i].aux_base = (u32)res->start;
- smem->regions[i].size = resource_size(res);
- smem->regions[i].virt_base = devm_ioremap_nocache(&pdev->dev,
- res->start,
- resource_size(res));
- if (!smem->regions[i].virt_base)
- return -ENOMEM;
- }
+ if (num_regions > 1 && (ret = qcom_smem_map_memory(smem, &pdev->dev,
+ "qcom,rpm-msg-ram", 1)))
+ return ret;
header = smem->regions[0].virt_base;
- if (header->initialized != 1 || header->reserved) {
+ if (le32_to_cpu(header->initialized) != 1 ||
+ le32_to_cpu(header->reserved)) {
dev_err(&pdev->dev, "SMEM is not initialized by SBL\n");
return -EINVAL;
}
static int qcom_smem_remove(struct platform_device *pdev)
{
- __smem = NULL;
hwspin_lock_free(__smem->hwlock);
+ __smem = NULL;
return 0;
}
projects / firefly-linux-kernel-4.4.55.git / blobdiff