@@ -3,17 +3,18 @@
* Copyright (c) 2015, Sony Mobile Communications AB.
* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
*/
+#define pr_fmt(fmt) "smem: " fmt
+
#include <dm/device.h>
#include <dm/device_compat.h>
#include <dm/ofnode.h>
#include <linux/bug.h>
#include <linux/io.h>
#include <linux/ioport.h>
#include <linux/sizes.h>
#include <soc/qcom/smem.h>
-#include <soc/qcom/socinfo.h>
/*
* The Qualcomm shared memory system is a allocate only heap structure that
* consists of one of more memory areas that can be accessed by the processors
@@ -260,31 +261,23 @@ struct smem_region {
};
/**
* struct qcom_smem - device data for the smem device
- * @dev: device pointer
- * @hwlock: reference to a hwspinlock
* @ptable: virtual base of partition table
* @global_partition: describes for global partition when in use
* @partitions: list of partitions of current processor/host
* @item_count: max accepted item number
- * @socinfo: platform device pointer
* @num_regions: number of @regions
* @regions: list of the memory regions defining the shared memory
*/
struct qcom_smem {
- struct device *dev;
-
- struct hwspinlock *hwlock;
-
u32 item_count;
- struct platform_device *socinfo;
struct smem_ptable *ptable;
struct smem_partition global_partition;
struct smem_partition partitions[SMEM_HOST_COUNT];
unsigned num_regions;
- struct smem_region regions[] __counted_by(num_regions);
+ struct smem_region regions[];
};
static void *
phdr_to_last_uncached_entry(struct smem_partition_header *phdr)
@@ -351,38 +344,9 @@ static void *cached_entry_to_item(struct smem_private_entry *e)
return p - le32_to_cpu(e->size);
}
/* Pointer to the one and only smem handle */
-static struct qcom_smem *__smem;
-
-/* Timeout (ms) for the trylock of remote spinlocks */
-#define HWSPINLOCK_TIMEOUT 1000
-
-/* The qcom hwspinlock id is always plus one from the smem host id */
-#define SMEM_HOST_ID_TO_HWSPINLOCK_ID(__x) ((__x) + 1)
-
-/**
- * qcom_smem_bust_hwspin_lock_by_host() - bust the smem hwspinlock for a host
- * @host: remote processor id
- *
- * Busts the hwspin_lock for the given smem host id. This helper is intended
- * for remoteproc drivers that manage remoteprocs with an equivalent smem
- * driver instance in the remote firmware. Drivers can force a release of the
- * smem hwspin_lock if the rproc unexpectedly goes into a bad state.
- *
- * Context: Process context.
- *
- * Returns: 0 on success, otherwise negative errno.
- */
-int qcom_smem_bust_hwspin_lock_by_host(unsigned int host)
-{
- /* This function is for remote procs, so ignore SMEM_HOST_APPS */
- if (host == SMEM_HOST_APPS || host >= SMEM_HOST_COUNT)
- return -EINVAL;
-
- return hwspin_lock_bust(__smem->hwlock, SMEM_HOST_ID_TO_HWSPINLOCK_ID(host));
-}
-EXPORT_SYMBOL_GPL(qcom_smem_bust_hwspin_lock_by_host);
+static struct qcom_smem *__smem __section(".data") = NULL;
/**
* qcom_smem_is_available() - Check if SMEM is available
*
@@ -429,9 +393,9 @@ static int qcom_smem_alloc_private(struct qcom_smem *smem,
/* Check that we don't grow into the cached region */
alloc_size = sizeof(*hdr) + ALIGN(size, 8);
if ((void *)hdr + alloc_size > cached) {
- dev_err(smem->dev, "Out of memory\n");
+ log_err("Out of memory\n");
return -ENOSPC;
}
hdr->canary = SMEM_PRIVATE_CANARY;
@@ -449,9 +413,9 @@ static int qcom_smem_alloc_private(struct qcom_smem *smem,
le32_add_cpu(&phdr->offset_free_uncached, alloc_size);
return 0;
bad_canary:
- dev_err(smem->dev, "Found invalid canary in hosts %hu:%hu partition\n",
+ log_err("Found invalid canary in hosts %hu:%hu partition\n",
le16_to_cpu(phdr->host0), le16_to_cpu(phdr->host1));
return -EINVAL;
}
@@ -500,29 +464,21 @@ static int qcom_smem_alloc_global(struct qcom_smem *smem,
*/
int qcom_smem_alloc(unsigned host, unsigned item, size_t size)
{
struct smem_partition *part;
- unsigned long flags;
int ret;
if (!__smem)
return -EPROBE_DEFER;
if (item < SMEM_ITEM_LAST_FIXED) {
- dev_err(__smem->dev,
- "Rejecting allocation of static entry %d\n", item);
+ log_err("Rejecting allocation of static entry %d\n", item);
return -EINVAL;
}
if (WARN_ON(item >= __smem->item_count))
return -EINVAL;
- ret = hwspin_lock_timeout_irqsave(__smem->hwlock,
- HWSPINLOCK_TIMEOUT,
- &flags);
- if (ret)
- return ret;
-
if (host < SMEM_HOST_COUNT && __smem->partitions[host].virt_base) {
part = &__smem->partitions[host];
ret = qcom_smem_alloc_private(__smem, part, item, size);
} else if (__smem->global_partition.virt_base) {
@@ -531,10 +487,8 @@ int qcom_smem_alloc(unsigned host, unsigned item, size_t size)
} else {
ret = qcom_smem_alloc_global(__smem, item, size);
}
- hwspin_unlock_irqrestore(__smem->hwlock, &flags);
-
return ret;
}
EXPORT_SYMBOL_GPL(qcom_smem_alloc);
@@ -660,9 +614,9 @@ static void *qcom_smem_get_private(struct qcom_smem *smem,
return ERR_PTR(-ENOENT);
invalid_canary:
- dev_err(smem->dev, "Found invalid canary in hosts %hu:%hu partition\n",
+ log_err("Found invalid canary in hosts %hu:%hu partition\n",
le16_to_cpu(phdr->host0), le16_to_cpu(phdr->host1));
return ERR_PTR(-EINVAL);
}
@@ -796,63 +750,8 @@ phys_addr_t qcom_smem_virt_to_phys(void *p)
return 0;
}
EXPORT_SYMBOL_GPL(qcom_smem_virt_to_phys);
-/**
- * qcom_smem_get_soc_id() - return the SoC ID
- * @id: On success, we return the SoC ID here.
- *
- * Look up SoC ID from HW/SW build ID and return it.
- *
- * Return: 0 on success, negative errno on failure.
- */
-int qcom_smem_get_soc_id(u32 *id)
-{
- struct socinfo *info;
-
- info = qcom_smem_get(QCOM_SMEM_HOST_ANY, SMEM_HW_SW_BUILD_ID, NULL);
- if (IS_ERR(info))
- return PTR_ERR(info);
-
- *id = __le32_to_cpu(info->id);
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(qcom_smem_get_soc_id);
-
-/**
- * qcom_smem_get_feature_code() - return the feature code
- * @code: On success, return the feature code here.
- *
- * Look up the feature code identifier from SMEM and return it.
- *
- * Return: 0 on success, negative errno on failure.
- */
-int qcom_smem_get_feature_code(u32 *code)
-{
- struct socinfo *info;
- u32 raw_code;
-
- info = qcom_smem_get(QCOM_SMEM_HOST_ANY, SMEM_HW_SW_BUILD_ID, NULL);
- if (IS_ERR(info))
- return PTR_ERR(info);
-
- /* This only makes sense for socinfo >= 16 */
- if (__le32_to_cpu(info->fmt) < SOCINFO_VERSION(0, 16))
- return -EOPNOTSUPP;
-
- raw_code = __le32_to_cpu(info->feature_code);
-
- /* Ensure the value makes sense */
- if (raw_code > SOCINFO_FC_INT_MAX)
- raw_code = SOCINFO_FC_UNKNOWN;
-
- *code = raw_code;
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(qcom_smem_get_feature_code);
-
static int qcom_smem_get_sbl_version(struct qcom_smem *smem)
{
struct smem_header *header;
__le32 *versions;
@@ -873,10 +772,9 @@ static struct smem_ptable *qcom_smem_get_ptable(struct qcom_smem *smem)
return ERR_PTR(-ENOENT);
version = le32_to_cpu(ptable->version);
if (version != 1) {
- dev_err(smem->dev,
- "Unsupported partition header version %d\n", version);
+ log_err("Unsupported partition header version %d\n", version);
return ERR_PTR(-EINVAL);
}
return ptable;
}
@@ -906,42 +804,42 @@ static struct smem_partition_header *
qcom_smem_partition_header(struct qcom_smem *smem,
struct smem_ptable_entry *entry, u16 host0, u16 host1)
{
struct smem_partition_header *header;
- u32 phys_addr;
+ u64 phys_addr;
u32 size;
phys_addr = smem->regions[0].aux_base + le32_to_cpu(entry->offset);
- header = devm_ioremap_wc(smem->dev, phys_addr, le32_to_cpu(entry->size));
+ header = (void *)phys_addr; // devm_ioremap_wc()
if (!header)
return NULL;
if (memcmp(header->magic, SMEM_PART_MAGIC, sizeof(header->magic))) {
- dev_err(smem->dev, "bad partition magic %4ph\n", header->magic);
+ log_err("bad partition magic %4ph\n", header->magic);
return NULL;
}
if (host0 != le16_to_cpu(header->host0)) {
- dev_err(smem->dev, "bad host0 (%hu != %hu)\n",
- host0, le16_to_cpu(header->host0));
+ log_err("bad host0 (%hu != %hu)\n",
+ host0, le16_to_cpu(header->host0));
return NULL;
}
if (host1 != le16_to_cpu(header->host1)) {
- dev_err(smem->dev, "bad host1 (%hu != %hu)\n",
- host1, le16_to_cpu(header->host1));
+ log_err("bad host1 (%hu != %hu)\n",
+ host1, le16_to_cpu(header->host1));
return NULL;
}
size = le32_to_cpu(header->size);
if (size != le32_to_cpu(entry->size)) {
- dev_err(smem->dev, "bad partition size (%u != %u)\n",
+ log_err("bad partition size (%u != %u)\n",
size, le32_to_cpu(entry->size));
return NULL;
}
if (le32_to_cpu(header->offset_free_uncached) > size) {
- dev_err(smem->dev, "bad partition free uncached (%u > %u)\n",
+ log_err("bad partition free uncached (%u > %u)\n",
le32_to_cpu(header->offset_free_uncached), size);
return NULL;
}
@@ -956,9 +854,9 @@ static int qcom_smem_set_global_partition(struct qcom_smem *smem)
bool found = false;
int i;
if (smem->global_partition.virt_base) {
- dev_err(smem->dev, "Already found the global partition\n");
+ log_err("Already found the global partition\n");
return -EINVAL;
}
ptable = qcom_smem_get_ptable(smem);
@@ -981,9 +879,9 @@ static int qcom_smem_set_global_partition(struct qcom_smem *smem)
}
}
if (!found) {
- dev_err(smem->dev, "Missing entry for global partition\n");
+ log_err("Missing entry for global partition\n");
return -EINVAL;
}
header = qcom_smem_partition_header(smem, entry,
@@ -1030,14 +928,14 @@ qcom_smem_enumerate_partitions(struct qcom_smem *smem, u16 local_host)
else
continue;
if (remote_host >= SMEM_HOST_COUNT) {
- dev_err(smem->dev, "bad host %u\n", remote_host);
+ log_err("bad host %u\n", remote_host);
return -EINVAL;
}
if (smem->partitions[remote_host].virt_base) {
- dev_err(smem->dev, "duplicate host %u\n", remote_host);
+ log_err("duplicate host %u\n", remote_host);
return -EINVAL;
}
header = qcom_smem_partition_header(smem, entry, host0, host1);
@@ -1058,12 +956,12 @@ static int qcom_smem_map_toc(struct qcom_smem *smem, struct smem_region *region)
{
u32 ptable_start;
/* map starting 4K for smem header */
- region->virt_base = devm_ioremap_wc(smem->dev, region->aux_base, SZ_4K);
+ region->virt_base = (void *)region->aux_base;
ptable_start = region->aux_base + region->size - SZ_4K;
/* map last 4k for toc */
- smem->ptable = devm_ioremap_wc(smem->dev, ptable_start, SZ_4K);
+ smem->ptable = (struct smem_ptable *)(u64)ptable_start;
if (!region->virt_base || !smem->ptable)
return -ENOMEM;
@@ -1071,54 +969,29 @@ static int qcom_smem_map_toc(struct qcom_smem *smem, struct smem_region *region)
}
static int qcom_smem_map_global(struct qcom_smem *smem, u32 size)
{
- u32 phys_addr;
+ u64 phys_addr;
phys_addr = smem->regions[0].aux_base;
smem->regions[0].size = size;
- smem->regions[0].virt_base = devm_ioremap_wc(smem->dev, phys_addr, size);
+ smem->regions[0].virt_base = (void *)phys_addr;
if (!smem->regions[0].virt_base)
return -ENOMEM;
return 0;
}
-static int qcom_smem_resolve_mem(struct qcom_smem *smem, const char *name,
- struct smem_region *region)
-{
- struct device *dev = smem->dev;
- struct device_node *np;
- struct resource r;
- int ret;
-
- np = of_parse_phandle(dev->of_node, name, 0);
- if (!np) {
- dev_err(dev, "No %s specified\n", name);
- return -EINVAL;
- }
-
- ret = of_address_to_resource(np, 0, &r);
- of_node_put(np);
- if (ret)
- return ret;
-
- region->aux_base = r.start;
- region->size = resource_size(&r);
-
- return 0;
-}
-
-static int qcom_smem_probe(struct platform_device *pdev)
+int qcom_smem_init(void)
{
struct smem_header *header;
- struct reserved_mem *rmem;
struct qcom_smem *smem;
- unsigned long flags;
int num_regions;
- int hwlock_id;
+ fdt_size_t reg_size = 0;
+ u32 phandle;
+ ofnode node, mem_node;
u32 version;
u32 size;
int ret;
int i;
@@ -1126,85 +999,58 @@ static int qcom_smem_probe(struct platform_device *pdev)
if (__smem)
return 0;
num_regions = 1;
- if (of_property_present(pdev->dev.of_node, "qcom,rpm-msg-ram"))
- num_regions++;
- smem = devm_kzalloc(&pdev->dev, struct_size(smem, regions, num_regions),
+ node = ofnode_by_compatible(ofnode_root(), "qcom,smem");
+ if (!ofnode_valid(node))
+ return -ENODEV;
+
+ if (ofnode_has_property(node, "memory-region")) {
+ ofnode_read_u32(node, "memory-region", &phandle);
+ mem_node = ofnode_get_by_phandle(phandle);
+ } else {
+ mem_node = node;
+ }
+
+ smem = kzalloc(sizeof(struct smem_region) * num_regions +
+ sizeof(struct qcom_smem),
GFP_KERNEL);
- if (!smem)
+ if (!smem) {
+ log_err("Failed to allocate memory for smem\n");
return -ENOMEM;
+ }
- smem->dev = &pdev->dev;
smem->num_regions = num_regions;
- rmem = of_reserved_mem_lookup(pdev->dev.of_node);
- if (rmem) {
- smem->regions[0].aux_base = rmem->base;
- smem->regions[0].size = rmem->size;
- } else {
- /*
- * Fall back to the memory-region reference, if we're not a
- * reserved-memory node.
- */
- ret = qcom_smem_resolve_mem(smem, "memory-region", &smem->regions[0]);
- if (ret)
- return ret;
+ smem->regions[0].aux_base = ofnode_get_addr(mem_node);
+ reg_size = ofnode_get_size(mem_node);
+ if (smem->regions[0].aux_base == FDT_ADDR_T_NONE) {
+ log_err("Failed to get base address\n");
+ return -EINVAL;
}
-
- if (num_regions > 1) {
- ret = qcom_smem_resolve_mem(smem, "qcom,rpm-msg-ram", &smem->regions[1]);
- if (ret)
- return ret;
- }
-
+ smem->regions[0].size = reg_size;
ret = qcom_smem_map_toc(smem, &smem->regions[0]);
- if (ret)
+ if (ret) {
+ log_err("Failed to map toc\n");
return ret;
+ }
for (i = 1; i < num_regions; i++) {
- smem->regions[i].virt_base = devm_ioremap_wc(&pdev->dev,
- smem->regions[i].aux_base,
- smem->regions[i].size);
- if (!smem->regions[i].virt_base) {
- dev_err(&pdev->dev, "failed to remap %pa\n", &smem->regions[i].aux_base);
- return -ENOMEM;
- }
+ smem->regions[i].virt_base = (void *)smem->regions[i].aux_base;
}
header = smem->regions[0].virt_base;
if (le32_to_cpu(header->initialized) != 1 ||
le32_to_cpu(header->reserved)) {
- dev_err(&pdev->dev, "SMEM is not initialized by SBL\n");
+ log_err("SMEM is not initialized by SBL\n");
return -EINVAL;
}
- hwlock_id = of_hwspin_lock_get_id(pdev->dev.of_node, 0);
- if (hwlock_id < 0) {
- if (hwlock_id != -EPROBE_DEFER)
- dev_err(&pdev->dev, "failed to retrieve hwlock\n");
- return hwlock_id;
- }
-
- smem->hwlock = hwspin_lock_request_specific(hwlock_id);
- if (!smem->hwlock)
- return -ENXIO;
-
- ret = hwspin_lock_timeout_irqsave(smem->hwlock, HWSPINLOCK_TIMEOUT, &flags);
- if (ret)
- return ret;
size = readl_relaxed(&header->available) + readl_relaxed(&header->free_offset);
- hwspin_unlock_irqrestore(smem->hwlock, &flags);
version = qcom_smem_get_sbl_version(smem);
- /*
- * smem header mapping is required only in heap version scheme, so unmap
- * it here. It will be remapped in qcom_smem_map_global() when whole
- * partition is mapped again.
- */
- devm_iounmap(smem->dev, smem->regions[0].virt_base);
switch (version >> 16) {
case SMEM_GLOBAL_PART_VERSION:
ret = qcom_smem_set_global_partition(smem);
if (ret < 0)
@@ -1215,63 +1061,19 @@ static int qcom_smem_probe(struct platform_device *pdev)
qcom_smem_map_global(smem, size);
smem->item_count = SMEM_ITEM_COUNT;
break;
default:
- dev_err(&pdev->dev, "Unsupported SMEM version 0x%x\n", version);
+ log_err("Unsupported SMEM version 0x%x\n", version);
return -EINVAL;
}
BUILD_BUG_ON(SMEM_HOST_APPS >= SMEM_HOST_COUNT);
ret = qcom_smem_enumerate_partitions(smem, SMEM_HOST_APPS);
- if (ret < 0 && ret != -ENOENT)
+ if (ret < 0 && ret != -ENOENT) {
+ log_err("Failed to enumerate partitions\n");
return ret;
+ }
__smem = smem;
- smem->socinfo = platform_device_register_data(&pdev->dev, "qcom-socinfo",
- PLATFORM_DEVID_NONE, NULL,
- 0);
- if (IS_ERR(smem->socinfo))
- dev_dbg(&pdev->dev, "failed to register socinfo device\n");
-
return 0;
}
-
-static void qcom_smem_remove(struct platform_device *pdev)
-{
- platform_device_unregister(__smem->socinfo);
-
- hwspin_lock_free(__smem->hwlock);
- __smem = NULL;
-}
-
-static const struct of_device_id qcom_smem_of_match[] = {
- { .compatible = "qcom,smem" },
- {}
-};
-MODULE_DEVICE_TABLE(of, qcom_smem_of_match);
-
-static struct platform_driver qcom_smem_driver = {
- .probe = qcom_smem_probe,
- .remove_new = qcom_smem_remove,
- .driver = {
- .name = "qcom-smem",
- .of_match_table = qcom_smem_of_match,
- .suppress_bind_attrs = true,
- },
-};
-
-static int __init qcom_smem_init(void)
-{
- return platform_driver_register(&qcom_smem_driver);
-}
-arch_initcall(qcom_smem_init);
-
-static void __exit qcom_smem_exit(void)
-{
- platform_driver_unregister(&qcom_smem_driver);
-}
-module_exit(qcom_smem_exit)
-
-MODULE_AUTHOR("Bjorn Andersson <bjorn.andersson@sonymobile.com>");
-MODULE_DESCRIPTION("Qualcomm Shared Memory Manager");
-MODULE_LICENSE("GPL v2");
@@ -3,18 +3,13 @@
#define __QCOM_SMEM_H__
#define QCOM_SMEM_HOST_ANY -1
+int qcom_smem_init(void);
+
bool qcom_smem_is_available(void);
int qcom_smem_alloc(unsigned host, unsigned item, size_t size);
void *qcom_smem_get(unsigned host, unsigned item, size_t *size);
int qcom_smem_get_free_space(unsigned host);
-phys_addr_t qcom_smem_virt_to_phys(void *p);
-
-int qcom_smem_get_soc_id(u32 *id);
-int qcom_smem_get_feature_code(u32 *code);
-
-int qcom_smem_bust_hwspin_lock_by_host(unsigned int host);
-
#endif
Port over the smem code to U-Boot and remove socinfo. Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org> --- drivers/soc/qcom/smem.c | 320 +++++++++--------------------------------------- include/soc/qcom/smem.h | 9 +- 2 files changed, 63 insertions(+), 266 deletions(-)