diff options
Diffstat (limited to 'target/linux/ipq806x/patches-3.18/035-soc-qcom-Add-Shared-Memory-Manager-driver.patch')
| -rw-r--r-- | target/linux/ipq806x/patches-3.18/035-soc-qcom-Add-Shared-Memory-Manager-driver.patch | 841 |
1 files changed, 0 insertions, 841 deletions
diff --git a/target/linux/ipq806x/patches-3.18/035-soc-qcom-Add-Shared-Memory-Manager-driver.patch b/target/linux/ipq806x/patches-3.18/035-soc-qcom-Add-Shared-Memory-Manager-driver.patch deleted file mode 100644 index c8cff1a..0000000 --- a/target/linux/ipq806x/patches-3.18/035-soc-qcom-Add-Shared-Memory-Manager-driver.patch +++ /dev/null @@ -1,841 +0,0 @@ -Content-Type: text/plain; charset="utf-8" -MIME-Version: 1.0 -Content-Transfer-Encoding: 7bit -Subject: [v2,2/2] soc: qcom: Add Shared Memory Manager driver -From: Bjorn Andersson <bjorn.andersson@sonymobile.com> -X-Patchwork-Id: 6202211 -Message-Id: <1428795178-24312-2-git-send-email-bjorn.andersson@sonymobile.com> -To: Kumar Gala <galak@codeaurora.org>, Andy Gross <agross@codeaurora.org>, - David Brown <davidb@codeaurora.org>, Jeffrey Hugo <jhugo@codeaurora.org> -Cc: <linux-kernel@vger.kernel.org>, <linux-arm-msm@vger.kernel.org>, - <linux-soc@vger.kernel.org> -Date: Sat, 11 Apr 2015 16:32:58 -0700 - -The Shared Memory Manager driver implements an interface for allocating -and accessing items in the memory area shared among all of the -processors in a Qualcomm platform. - -Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com> -Reviewed-by: Andy Gross <agross@codeaurora.org> -Tested-by: Andy Gross <agross@codeaurora.org> - ---- -Changes since v1: -- ioremapping the regions nocache -- improved documentation of the two regions of partitions -- corrected free space check in private allocator - - drivers/soc/qcom/Kconfig | 7 + - drivers/soc/qcom/Makefile | 1 + - drivers/soc/qcom/smem.c | 768 ++++++++++++++++++++++++++++++++++++++++++ - include/linux/soc/qcom/smem.h | 14 + - 4 files changed, 790 insertions(+) - create mode 100644 drivers/soc/qcom/smem.c - create mode 100644 include/linux/soc/qcom/smem.h - ---- a/drivers/soc/qcom/Kconfig -+++ b/drivers/soc/qcom/Kconfig -@@ -9,3 +9,10 @@ config QCOM_GSBI - functions for connecting the underlying serial UART, SPI, and I2C - devices to the output pins. - -+config QCOM_SMEM -+ tristate "Qualcomm Shared Memory Manager (SMEM)" -+ depends on ARCH_QCOM -+ help -+ Say y here to enable support for the Qualcomm Shared Memory Manager. -+ The driver provides an interface to items in a heap shared among all -+ processors in a Qualcomm platform. ---- a/drivers/soc/qcom/Makefile -+++ b/drivers/soc/qcom/Makefile -@@ -1 +1,2 @@ - obj-$(CONFIG_QCOM_GSBI) += qcom_gsbi.o -+obj-$(CONFIG_QCOM_SMEM) += smem.o ---- /dev/null -+++ b/drivers/soc/qcom/smem.c -@@ -0,0 +1,768 @@ -+/* -+ * Copyright (c) 2015, Sony Mobile Communications AB. -+ * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved. -+ * -+ * This program is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License version 2 and -+ * only version 2 as published by the Free Software Foundation. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ */ -+ -+#include <linux/hwspinlock.h> -+#include <linux/io.h> -+#include <linux/module.h> -+#include <linux/of.h> -+#include <linux/of_address.h> -+#include <linux/platform_device.h> -+#include <linux/slab.h> -+#include <linux/soc/qcom/smem.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 -+ * in the SoC. -+ * -+ * All systems contains a global heap, accessible by all processors in the SoC, -+ * with a table of contents data structure (@smem_header) at the beginning of -+ * the main shared memory block. -+ * -+ * The global header contains metadata for allocations as well as a fixed list -+ * of 512 entries (@smem_global_entry) that can be initialized to reference -+ * parts of the shared memory space. -+ * -+ * -+ * In addition to this global heap a set of "private" heaps can be set up at -+ * boot time with access restrictions so that only certain processor pairs can -+ * access the data. -+ * -+ * These partitions are referenced from an optional partition table -+ * (@smem_ptable), that is found 4kB from the end of the main smem region. The -+ * partition table entries (@smem_ptable_entry) lists the involved processors -+ * (or hosts) and their location in the main shared memory region. -+ * -+ * Each partition starts with a header (@smem_partition_header) that identifies -+ * the partition and holds properties for the two internal memory regions. The -+ * two regions are cached and non-cached memory respectively. Each region -+ * contain a link list of allocation headers (@smem_private_entry) followed by -+ * their data. -+ * -+ * Items in the non-cached region are allocated from the start of the partition -+ * while items in the cached region are allocated from the end. The free area -+ * is hence the region between the cached and non-cached offsets. -+ * -+ * -+ * To synchronize allocations in the shared memory heaps a remote spinlock must -+ * be held - currently lock number 3 of the sfpb or tcsr is used for this on all -+ * platforms. -+ * -+ */ -+ -+/** -+ * struct smem_proc_comm - proc_comm communication struct (legacy) -+ * @command: current command to be executed -+ * @status: status of the currently requested command -+ * @params: parameters to the command -+ */ -+struct smem_proc_comm { -+ u32 command; -+ u32 status; -+ u32 params[2]; -+}; -+ -+/** -+ * struct smem_global_entry - entry to reference smem items on the heap -+ * @allocated: boolean to indicate if this entry is used -+ * @offset: offset to the allocated space -+ * @size: size of the allocated space, 8 byte aligned -+ * @aux_base: base address for the memory region used by this unit, or 0 for -+ * 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 */ -+}; -+#define AUX_BASE_MASK 0xfffffffc -+ -+/** -+ * struct smem_header - header found in beginning of primary smem region -+ * @proc_comm: proc_comm communication interface (legacy) -+ * @version: array of versions for the various subsystems -+ * @initialized: boolean to indicate that smem is initialized -+ * @free_offset: index of the first unallocated byte in smem -+ * @available: number of bytes available for allocation -+ * @reserved: reserved field, must be 0 -+ * toc: array of references to items -+ */ -+struct smem_header { -+ struct smem_proc_comm proc_comm[4]; -+ u32 version[32]; -+ u32 initialized; -+ u32 free_offset; -+ u32 available; -+ u32 reserved; -+ struct smem_global_entry toc[]; -+}; -+ -+/** -+ * struct smem_ptable_entry - one entry in the @smem_ptable list -+ * @offset: offset, within the main shared memory region, of the partition -+ * @size: size of the partition -+ * @flags: flags for the partition (currently unused) -+ * @host0: first processor/host with access to this partition -+ * @host1: second processor/host with access to this partition -+ * @reserved: reserved entries for later use -+ */ -+struct smem_ptable_entry { -+ u32 offset; -+ u32 size; -+ u32 flags; -+ u16 host0; -+ u16 host1; -+ u32 reserved[8]; -+}; -+ -+/** -+ * struct smem_ptable - partition table for the private partitions -+ * @magic: magic number, must be SMEM_PTABLE_MAGIC -+ * @version: version of the partition table -+ * @num_entries: number of partitions in the table -+ * @reserved: for now reserved entries -+ * @entry: list of @smem_ptable_entry for the @num_entries partitions -+ */ -+struct smem_ptable { -+ u32 magic; -+ u32 version; -+ u32 num_entries; -+ u32 reserved[5]; -+ struct smem_ptable_entry entry[]; -+}; -+#define SMEM_PTABLE_MAGIC 0x434f5424 /* "$TOC" */ -+ -+/** -+ * struct smem_partition_header - header of the partitions -+ * @magic: magic number, must be SMEM_PART_MAGIC -+ * @host0: first processor/host with access to this partition -+ * @host1: second processor/host with access to this partition -+ * @size: size of the partition -+ * @offset_free_uncached: offset to the first free byte of uncached memory in -+ * this partition -+ * @offset_free_cached: offset to the first free byte of cached memory in this -+ * partition -+ * @reserved: for now reserved entries -+ */ -+struct smem_partition_header { -+ u32 magic; -+ u16 host0; -+ u16 host1; -+ u32 size; -+ u32 offset_free_uncached; -+ u32 offset_free_cached; -+ u32 reserved[3]; -+}; -+#define SMEM_PART_MAGIC 0x54525024 /* "$PRT" */ -+ -+/** -+ * struct smem_private_entry - header of each item in the private partition -+ * @canary: magic number, must be SMEM_PRIVATE_CANARY -+ * @item: identifying number of the smem item -+ * @size: size of the data, including padding bytes -+ * @padding_data: number of bytes of padding of data -+ * @padding_hdr: number of bytes of padding between the header and the data -+ * @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; -+}; -+#define SMEM_PRIVATE_CANARY 0xa5a5 -+ -+/* -+ * Item 3 of the global heap contains an array of versions for the various -+ * software components in the SoC. We verify that the boot loader version is -+ * what the expected version (SMEM_EXPECTED_VERSION) as a sanity check. -+ */ -+#define SMEM_ITEM_VERSION 3 -+#define SMEM_MASTER_SBL_VERSION_INDEX 7 -+#define SMEM_EXPECTED_VERSION 11 -+ -+/* -+ * The first 8 items are only to be allocated by the boot loader while -+ * initializing the heap. -+ */ -+#define SMEM_ITEM_LAST_FIXED 8 -+ -+/* Highest accepted item number, for both global and private heaps */ -+#define SMEM_ITEM_LAST 512 -+ -+/* Processor/host identifier for the application processor */ -+#define SMEM_HOST_APPS 0 -+ -+/* Max number of processors/hosts in a system */ -+#define SMEM_HOST_COUNT 7 -+ -+/** -+ * 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 -+ * @size: size of the memory region -+ */ -+struct smem_region { -+ u32 aux_base; -+ void __iomem *virt_base; -+ size_t size; -+}; -+ -+/** -+ * struct qcom_smem - device data for the smem device -+ * @dev: device pointer -+ * @hwlock: reference to a hwspinlock -+ * @partitions: list of pointers to partitions affecting the current -+ * processor/host -+ * @num_regions: number of @regions -+ * @regions: list of the memory regions defining the shared memory -+ */ -+struct qcom_smem { -+ struct device *dev; -+ -+ struct hwspinlock *hwlock; -+ -+ struct smem_partition_header *partitions[SMEM_HOST_COUNT]; -+ -+ unsigned num_regions; -+ struct smem_region regions[0]; -+}; -+ -+/* 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 -+ -+static int qcom_smem_alloc_private(struct qcom_smem *smem, -+ unsigned host, -+ unsigned item, -+ size_t size) -+{ -+ struct smem_partition_header *phdr; -+ struct smem_private_entry *hdr; -+ size_t alloc_size; -+ void *p; -+ -+ /* We're not going to find it if there's no matching partition */ -+ if (host >= SMEM_HOST_COUNT || !smem->partitions[host]) -+ return -ENOENT; -+ -+ phdr = smem->partitions[host]; -+ -+ p = (void *)phdr + sizeof(*phdr); -+ while (p < (void *)phdr + phdr->offset_free_uncached) { -+ hdr = p; -+ -+ if (hdr->canary != SMEM_PRIVATE_CANARY) { -+ dev_err(smem->dev, -+ "Found invalid canary in host %d partition\n", -+ host); -+ return -EINVAL; -+ } -+ -+ if (hdr->item == item) -+ return -EEXIST; -+ -+ p += sizeof(*hdr) + hdr->padding_hdr + hdr->size; -+ } -+ -+ /* 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) { -+ 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->padding_hdr = 0; -+ -+ /* -+ * Ensure the header is written before we advance the free offset, so -+ * that remote processors that does not take the remote spinlock still -+ * gets a consistent view of the linked list. -+ */ -+ wmb(); -+ phdr->offset_free_uncached += alloc_size; -+ -+ return 0; -+} -+ -+static int qcom_smem_alloc_global(struct qcom_smem *smem, -+ unsigned item, -+ size_t size) -+{ -+ struct smem_header *header; -+ struct smem_global_entry *entry; -+ -+ if (WARN_ON(item >= SMEM_ITEM_LAST)) -+ return -EINVAL; -+ -+ header = smem->regions[0].virt_base; -+ entry = &header->toc[item]; -+ if (entry->allocated) -+ return -EEXIST; -+ -+ size = ALIGN(size, 8); -+ if (WARN_ON(size > header->available)) -+ return -ENOMEM; -+ -+ entry->offset = header->free_offset; -+ entry->size = size; -+ -+ /* -+ * Ensure the header is consistent before we mark the item allocated, -+ * so that remote processors will get a consistent view of the item -+ * even though they do not take the spinlock on read. -+ */ -+ wmb(); -+ entry->allocated = 1; -+ -+ header->free_offset += size; -+ header->available -= size; -+ -+ return 0; -+} -+ -+/** -+ * qcom_smem_alloc - allocate space for a smem item -+ * @host: remote processor id, or -1 -+ * @item: smem item handle -+ * @size: number of bytes to be allocated -+ * -+ * Allocate space for a given smem item of size @size, given that the item is -+ * not yet allocated. -+ */ -+int qcom_smem_alloc(unsigned host, unsigned item, size_t size) -+{ -+ 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); -+ return -EINVAL; -+ } -+ -+ ret = hwspin_lock_timeout_irqsave(__smem->hwlock, -+ HWSPINLOCK_TIMEOUT, -+ &flags); -+ if (ret) -+ return ret; -+ -+ ret = qcom_smem_alloc_private(__smem, host, item, size); -+ if (ret == -ENOENT) -+ ret = qcom_smem_alloc_global(__smem, item, size); -+ -+ hwspin_unlock_irqrestore(__smem->hwlock, &flags); -+ -+ return ret; -+} -+EXPORT_SYMBOL(qcom_smem_alloc); -+ -+static int qcom_smem_get_global(struct qcom_smem *smem, -+ unsigned item, -+ void **ptr, -+ size_t *size) -+{ -+ struct smem_header *header; -+ struct smem_region *area; -+ struct smem_global_entry *entry; -+ u32 aux_base; -+ unsigned i; -+ -+ if (WARN_ON(item >= SMEM_ITEM_LAST)) -+ return -EINVAL; -+ -+ header = smem->regions[0].virt_base; -+ entry = &header->toc[item]; -+ if (!entry->allocated) -+ return -ENXIO; -+ -+ if (ptr != NULL) { -+ aux_base = entry->aux_base & AUX_BASE_MASK; -+ -+ 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 (size != NULL) -+ *size = entry->size; -+ -+ return 0; -+} -+ -+static int qcom_smem_get_private(struct qcom_smem *smem, -+ unsigned host, -+ unsigned item, -+ void **ptr, -+ size_t *size) -+{ -+ struct smem_partition_header *phdr; -+ struct smem_private_entry *hdr; -+ void *p; -+ -+ /* We're not going to find it if there's no matching partition */ -+ if (host >= SMEM_HOST_COUNT || !smem->partitions[host]) -+ return -ENOENT; -+ -+ phdr = smem->partitions[host]; -+ -+ p = (void *)phdr + sizeof(*phdr); -+ while (p < (void *)phdr + phdr->offset_free_uncached) { -+ hdr = p; -+ -+ if (hdr->canary != SMEM_PRIVATE_CANARY) { -+ dev_err(smem->dev, -+ "Found invalid canary in host %d partition\n", -+ host); -+ return -EINVAL; -+ } -+ -+ if (hdr->item == item) { -+ if (ptr != NULL) -+ *ptr = p + sizeof(*hdr) + hdr->padding_hdr; -+ -+ if (size != NULL) -+ *size = hdr->size - hdr->padding_data; -+ -+ return 0; -+ } -+ -+ p += sizeof(*hdr) + hdr->padding_hdr + hdr->size; -+ } -+ -+ return -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. -+ */ -+int qcom_smem_get(unsigned host, unsigned item, void **ptr, size_t *size) -+{ -+ unsigned long flags; -+ int ret; -+ -+ if (!__smem) -+ return -EPROBE_DEFER; -+ -+ ret = hwspin_lock_timeout_irqsave(__smem->hwlock, -+ HWSPINLOCK_TIMEOUT, -+ &flags); -+ if (ret) -+ return ret; -+ -+ ret = qcom_smem_get_private(__smem, host, item, ptr, size); -+ if (ret == -ENOENT) -+ ret = qcom_smem_get_global(__smem, item, ptr, size); -+ -+ hwspin_unlock_irqrestore(__smem->hwlock, &flags); -+ return ret; -+ -+} -+EXPORT_SYMBOL(qcom_smem_get); -+ -+/** -+ * qcom_smem_get_free_space - retrieve amont of free space in a partition -+ * @host: the remote processor identifing a partition, or -1 -+ * -+ * To be used by smem clients as a quick way to determine if any new -+ * allocations has been made. -+ */ -+int qcom_smem_get_free_space(unsigned host) -+{ -+ struct smem_partition_header *phdr; -+ struct smem_header *header; -+ unsigned ret; -+ -+ if (!__smem) -+ return -EPROBE_DEFER; -+ -+ if (host < SMEM_HOST_COUNT && __smem->partitions[host]) { -+ phdr = __smem->partitions[host]; -+ ret = phdr->offset_free_uncached; -+ } else { -+ header = __smem->regions[0].virt_base; -+ ret = header->available; -+ } -+ -+ return ret; -+} -+EXPORT_SYMBOL(qcom_smem_get_free_space); -+ -+static int qcom_smem_get_sbl_version(struct qcom_smem *smem) -+{ -+ unsigned *versions; -+ size_t size; -+ int ret; -+ -+ ret = qcom_smem_get_global(smem, SMEM_ITEM_VERSION, -+ (void **)&versions, &size); -+ if (ret < 0) { -+ dev_err(smem->dev, "Unable to read the version item\n"); -+ return -ENOENT; -+ } -+ -+ if (size < sizeof(unsigned) * SMEM_MASTER_SBL_VERSION_INDEX) { -+ dev_err(smem->dev, "Version item is too small\n"); -+ return -EINVAL; -+ } -+ -+ return versions[SMEM_MASTER_SBL_VERSION_INDEX]; -+} -+ -+static int qcom_smem_enumerate_partitions(struct qcom_smem *smem, -+ unsigned local_host) -+{ -+ struct smem_partition_header *header; -+ struct smem_ptable_entry *entry; -+ struct smem_ptable *ptable; -+ unsigned remote_host; -+ int i; -+ -+ ptable = smem->regions[0].virt_base + smem->regions[0].size - 4 * 1024; -+ if (ptable->magic != SMEM_PTABLE_MAGIC) -+ return 0; -+ -+ if (ptable->version != 1) { -+ dev_err(smem->dev, -+ "Unsupported partition header version %d\n", -+ ptable->version); -+ return -EINVAL; -+ } -+ -+ for (i = 0; i < ptable->num_entries; i++) { -+ entry = &ptable->entry[i]; -+ -+ if (entry->host0 != local_host && entry->host1 != local_host) -+ continue; -+ -+ if (!entry->offset) -+ continue; -+ -+ if (!entry->size) -+ continue; -+ -+ if (entry->host0 == local_host) -+ remote_host = entry->host1; -+ else -+ remote_host = entry->host0; -+ -+ if (smem->partitions[remote_host]) { -+ dev_err(smem->dev, -+ "Already found a partition for host %d\n", -+ remote_host); -+ return -EINVAL; -+ } -+ -+ header = smem->regions[0].virt_base + entry->offset; -+ -+ if (header->magic != SMEM_PART_MAGIC) { -+ dev_err(smem->dev, -+ "Partition %d has invalid magic\n", i); -+ return -EINVAL; -+ } -+ -+ if (header->host0 != local_host && header->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) { -+ dev_err(smem->dev, -+ "Partition %d hosts are invalid\n", i); -+ return -EINVAL; -+ } -+ -+ if (header->size != entry->size) { -+ dev_err(smem->dev, -+ "Partition %d has invalid size\n", i); -+ return -EINVAL; -+ } -+ -+ if (header->offset_free_uncached > header->size) { -+ dev_err(smem->dev, -+ "Partition %d has invalid free pointer\n", i); -+ return -EINVAL; -+ } -+ -+ smem->partitions[remote_host] = header; -+ } -+ -+ return 0; -+} -+ -+static int qcom_smem_count_mem_regions(struct platform_device *pdev) -+{ -+ struct resource *res; -+ int num_regions = 0; -+ int i; -+ -+ for (i = 0; i < pdev->num_resources; i++) { -+ res = &pdev->resource[i]; -+ -+ if (resource_type(res) == IORESOURCE_MEM) -+ num_regions++; -+ } -+ -+ return num_regions; -+} -+ -+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 hwlock_id; -+ u32 version; -+ int ret; -+ int i; -+ -+ num_regions = qcom_smem_count_mem_regions(pdev) + 1; -+ -+ array_size = num_regions * sizeof(struct smem_region); -+ smem = devm_kzalloc(&pdev->dev, sizeof(*smem) + array_size, GFP_KERNEL); -+ if (!smem) -+ return -ENOMEM; -+ -+ 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); -+ 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; -+ } -+ -+ header = smem->regions[0].virt_base; -+ if (header->initialized != 1 || header->reserved) { -+ dev_err(&pdev->dev, "SMEM is not initilized by SBL\n"); -+ return -EINVAL; -+ } -+ -+ version = qcom_smem_get_sbl_version(smem); -+ if (version >> 16 != SMEM_EXPECTED_VERSION) { -+ dev_err(&pdev->dev, "Unsupported smem version 0x%x\n", version); -+ return -EINVAL; -+ } -+ -+ ret = qcom_smem_enumerate_partitions(smem, SMEM_HOST_APPS); -+ if (ret < 0) -+ return ret; -+ -+ hwlock_id = of_hwspin_lock_get_id(pdev->dev.of_node, 0); -+ if (hwlock_id < 0) { -+ 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; -+ -+ __smem = smem; -+ -+ return 0; -+} -+ -+static int qcom_smem_remove(struct platform_device *pdev) -+{ -+ hwspin_lock_free(__smem->hwlock); -+ __smem = NULL; -+ -+ return 0; -+} -+ -+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 = 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("GPLv2"); ---- /dev/null -+++ b/include/linux/soc/qcom/smem.h -@@ -0,0 +1,14 @@ -+#ifndef __QCOM_SMEM_H__ -+#define __QCOM_SMEM_H__ -+ -+struct device_node; -+struct qcom_smem; -+ -+#define QCOM_SMEM_HOST_ANY -1 -+ -+int qcom_smem_alloc(unsigned host, unsigned item, size_t size); -+int qcom_smem_get(unsigned host, unsigned item, void **ptr, size_t *size); -+ -+int qcom_smem_get_free_space(unsigned host); -+ -+#endif |