[PATCH v2 08/15] soc: qcom: smem: adjust for U-Boot
Sumit Garg
sumit.garg at kernel.org
Mon May 18 13:03:16 CEST 2026
On Mon, May 04, 2026 at 08:57:36PM +0200, Casey Connolly wrote:
> Port over the smem code to U-Boot and ensure the smem region gets mapped
> after dcache is enabled.
>
> Signed-off-by: Casey Connolly <casey.connolly at linaro.org>
> ---
> drivers/soc/qcom/smem.c | 399 +++++++++++++-----------------------------------
> include/soc/qcom/smem.h | 9 +-
> 2 files changed, 104 insertions(+), 304 deletions(-)
>
> diff --git a/drivers/soc/qcom/smem.c b/drivers/soc/qcom/smem.c
> index 7143856e85c3..96288d7bcdef 100644
> --- a/drivers/soc/qcom/smem.c
> +++ b/drivers/soc/qcom/smem.c
> @@ -3,17 +3,19 @@
> * Copyright (c) 2015, Sony Mobile Communications AB.
> * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
> */
>
> +#define pr_fmt(fmt) "smem: " fmt
> +
> +#include <asm/system.h>
> #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
> @@ -246,8 +248,10 @@ struct smem_info {
> };
>
> static const u8 SMEM_INFO_MAGIC[] = { 0x53, 0x49, 0x49, 0x49 }; /* SIII */
>
> +#define SMEM_MAX_REGIONS 2
> +
> /**
> * struct smem_region - representation of a chunk of memory used for smem
> * @aux_base: identifier of aux_mem base
> * @virt_base: virtual base address of memory with this aux_mem identifier
> @@ -260,33 +264,31 @@ 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[SMEM_MAX_REGIONS];
> };
>
> +/* Pre-allocated storage for SMEM */
> +static struct qcom_smem __smem __section(".data") = { 0 };
> +
> +/* Pointer to the one and only smem handle */
> +static struct qcom_smem *smem __section(".data") = NULL;
> +
> static void *
> phdr_to_last_uncached_entry(struct smem_partition_header *phdr)
> {
> void *p = phdr;
> @@ -350,48 +352,16 @@ 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);
> -
> /**
> * qcom_smem_is_available() - Check if SMEM is available
> *
> * Return: true if SMEM is available, false otherwise.
> */
> bool qcom_smem_is_available(void)
Is this API going to be used in U-Boot? If not then we can drop it.
> {
> - return !!__smem;
> + return !!smem;
> }
> EXPORT_SYMBOL_GPL(qcom_smem_is_available);
>
> static int qcom_smem_alloc_private(struct qcom_smem *smem,
> @@ -429,9 +399,9 @@ 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 +419,9 @@ 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;
> }
> @@ -500,41 +470,31 @@ 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)
> + if (!smem)
> return -EPROBE_DEFER;
The probe defer is specific to Linux, can be dropped for U-Boot.
>
> 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))
> + 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) {
> - part = &__smem->global_partition;
> - ret = qcom_smem_alloc_private(__smem, part, item, size);
> + 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) {
> + part = &smem->global_partition;
> + ret = qcom_smem_alloc_private(smem, part, item, size);
> } else {
> - ret = qcom_smem_alloc_global(__smem, item, size);
> + ret = qcom_smem_alloc_global(smem, item, size);
> }
>
> - hwspin_unlock_irqrestore(__smem->hwlock, &flags);
> -
> return ret;
> }
> EXPORT_SYMBOL_GPL(qcom_smem_alloc);
These symbol exports can also be dropped.
>
> @@ -660,9 +620,9 @@ 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);
> }
> @@ -680,22 +640,22 @@ void *qcom_smem_get(unsigned host, unsigned item, size_t *size)
> {
> struct smem_partition *part;
> void *ptr = ERR_PTR(-EPROBE_DEFER);
>
> - if (!__smem)
> + if (!smem)
> return ptr;
>
> - if (WARN_ON(item >= __smem->item_count))
> + if (WARN_ON(item >= smem->item_count))
> return ERR_PTR(-EINVAL);
>
> - if (host < SMEM_HOST_COUNT && __smem->partitions[host].virt_base) {
> - part = &__smem->partitions[host];
> - ptr = qcom_smem_get_private(__smem, part, item, size);
> - } else if (__smem->global_partition.virt_base) {
> - part = &__smem->global_partition;
> - ptr = qcom_smem_get_private(__smem, part, item, size);
> + if (host < SMEM_HOST_COUNT && smem->partitions[host].virt_base) {
> + part = &smem->partitions[host];
> + ptr = qcom_smem_get_private(smem, part, item, size);
> + } else if (smem->global_partition.virt_base) {
> + part = &smem->global_partition;
> + ptr = qcom_smem_get_private(smem, part, item, size);
> } else {
> - ptr = qcom_smem_get_global(__smem, item, size);
> + ptr = qcom_smem_get_global(smem, item, size);
> }
>
> return ptr;
> }
> @@ -714,32 +674,32 @@ int qcom_smem_get_free_space(unsigned host)
> struct smem_partition_header *phdr;
> struct smem_header *header;
> unsigned ret;
>
> - if (!__smem)
> + if (!smem)
> return -EPROBE_DEFER;
Ditto here.
>
> - if (host < SMEM_HOST_COUNT && __smem->partitions[host].virt_base) {
> - part = &__smem->partitions[host];
> + if (host < SMEM_HOST_COUNT && smem->partitions[host].virt_base) {
> + part = &smem->partitions[host];
> phdr = part->virt_base;
> ret = le32_to_cpu(phdr->offset_free_cached) -
> le32_to_cpu(phdr->offset_free_uncached);
>
> if (ret > le32_to_cpu(part->size))
> return -EINVAL;
> - } else if (__smem->global_partition.virt_base) {
> - part = &__smem->global_partition;
> + } else if (smem->global_partition.virt_base) {
> + part = &smem->global_partition;
> phdr = part->virt_base;
> ret = le32_to_cpu(phdr->offset_free_cached) -
> le32_to_cpu(phdr->offset_free_uncached);
>
> if (ret > le32_to_cpu(part->size))
> return -EINVAL;
> } else {
> - header = __smem->regions[0].virt_base;
> + header = smem->regions[0].virt_base;
> ret = le32_to_cpu(header->available);
>
> - if (ret > __smem->regions[0].size)
> + if (ret > smem->regions[0].size)
> return -EINVAL;
> }
>
> return ret;
> @@ -765,27 +725,27 @@ phys_addr_t qcom_smem_virt_to_phys(void *p)
> u64 offset;
> u32 i;
>
> for (i = 0; i < SMEM_HOST_COUNT; i++) {
> - part = &__smem->partitions[i];
> + part = &smem->partitions[i];
>
> if (addr_in_range(part->virt_base, part->size, p)) {
> offset = p - part->virt_base;
>
> return (phys_addr_t)part->phys_base + offset;
> }
> }
>
> - part = &__smem->global_partition;
> + part = &smem->global_partition;
>
> if (addr_in_range(part->virt_base, part->size, p)) {
> offset = p - part->virt_base;
>
> return (phys_addr_t)part->phys_base + offset;
> }
>
> - 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 (addr_in_range(area->virt_base, area->size, p)) {
> offset = p - area->virt_base;
>
> @@ -796,63 +756,8 @@ 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 +778,9 @@ 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 +810,42 @@ 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 +860,9 @@ 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 +885,9 @@ 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 +934,14 @@ 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);
> @@ -1058,153 +962,100 @@ 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;
>
> + if (dcache_status())
> + mmu_map_region(region->aux_base, region->size, false);
> +
> return 0;
> }
>
> 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;
>
> - if (__smem)
> + if (dcache_status() && smem)
> + mmu_map_region(smem->regions[0].aux_base, smem->regions[0].size, false);
The kernel does WC mapping for SMEM which is uncached, so in U-Boot we
should follow the same. This especially becomes important when running
in EL2 mode.
-Sumit
> +
> + if (smem)
> return 0;
>
> + smem = &__smem;
> +
> 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),
> - GFP_KERNEL);
> - if (!smem)
> - return -ENOMEM;
> + 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->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 +1066,17 @@ 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 at sonymobile.com>");
> -MODULE_DESCRIPTION("Qualcomm Shared Memory Manager");
> -MODULE_LICENSE("GPL v2");
> diff --git a/include/soc/qcom/smem.h b/include/soc/qcom/smem.h
> index f946e3beca21..a955db08c0f0 100644
> --- a/include/soc/qcom/smem.h
> +++ b/include/soc/qcom/smem.h
> @@ -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
>
> --
> 2.53.0
>
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