| /* |
| * Copyright (c) 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/init.h> |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/err.h> |
| #include <linux/delay.h> |
| #include <linux/platform_device.h> |
| #include <mach/subsystem_restart.h> |
| #include <mach/qdsp6v2/apr.h> |
| #include <linux/of_device.h> |
| #include <linux/msm_audio_ion.h> |
| |
| #include <linux/iommu.h> |
| #include <mach/iommu_domains.h> |
| |
| struct msm_audio_ion_private { |
| bool smmu_enabled; |
| bool audioheap_enabled; |
| struct iommu_group *group; |
| u32 domain_id; |
| struct iommu_domain *domain; |
| }; |
| |
| static struct msm_audio_ion_private msm_audio_ion_data = {0,}; |
| |
| |
| static int msm_audio_ion_get_phys(struct ion_client *client, |
| struct ion_handle *handle, |
| ion_phys_addr_t *addr, size_t *len); |
| |
| |
| |
| int msm_audio_ion_alloc(const char *name, struct ion_client **client, |
| struct ion_handle **handle, size_t bufsz, |
| ion_phys_addr_t *paddr, size_t *pa_len, void **vaddr) |
| { |
| int rc = 0; |
| |
| if ((msm_audio_ion_data.smmu_enabled == true) && |
| (msm_audio_ion_data.group == NULL)) { |
| pr_debug("%s:probe is not done, deferred\n", __func__); |
| return -EPROBE_DEFER; |
| } |
| if (!name || !client || !handle || !paddr || !vaddr |
| || !bufsz || !pa_len) { |
| pr_err("%s: Invalid params\n", __func__); |
| return -EINVAL; |
| } |
| *client = msm_audio_ion_client_create(UINT_MAX, name); |
| if (IS_ERR_OR_NULL((void *)(*client))) { |
| pr_err("%s: ION create client for AUDIO failed\n", __func__); |
| goto err; |
| } |
| |
| *handle = ion_alloc(*client, bufsz, SZ_4K, |
| ION_HEAP(ION_AUDIO_HEAP_ID), 0); |
| if (IS_ERR_OR_NULL((void *) (*handle))) { |
| pr_debug("system heap is used"); |
| msm_audio_ion_data.audioheap_enabled = 0; |
| *handle = ion_alloc(*client, bufsz, SZ_4K, |
| ION_HEAP(ION_SYSTEM_HEAP_ID), 0); |
| |
| } else { |
| pr_debug("audio heap is used"); |
| msm_audio_ion_data.audioheap_enabled = 1; |
| } |
| |
| if (IS_ERR_OR_NULL((void *) (*handle))) { |
| pr_err("%s: ION memory allocation for AUDIO failed rc=%d, smmu_enabled=%d\n", |
| __func__, rc, msm_audio_ion_data.smmu_enabled); |
| goto err_ion_client; |
| } |
| |
| rc = msm_audio_ion_get_phys(*client, *handle, paddr, pa_len); |
| if (rc) { |
| pr_err("%s: ION Get Physical for AUDIO failed, rc = %d\n", |
| __func__, rc); |
| goto err_ion_handle; |
| } |
| |
| *vaddr = ion_map_kernel(*client, *handle); |
| if (IS_ERR_OR_NULL((void *)*vaddr)) { |
| pr_err("%s: ION memory mapping for AUDIO failed\n", __func__); |
| goto err_ion_handle; |
| } |
| pr_debug("%s: mapped address = %p, size=%d\n", __func__, *vaddr, bufsz); |
| |
| if (bufsz != 0) { |
| pr_debug("%s: memset to 0 %p %d\n", __func__, *vaddr, bufsz); |
| memset((void *)*vaddr, 0, bufsz); |
| } |
| |
| return 0; |
| |
| err_ion_handle: |
| ion_free(*client, *handle); |
| err_ion_client: |
| msm_audio_ion_client_destroy(*client); |
| *handle = NULL; |
| *client = NULL; |
| err: |
| return -EINVAL; |
| } |
| |
| int msm_audio_ion_import(const char *name, struct ion_client **client, |
| struct ion_handle **handle, int fd, |
| unsigned long *ionflag, size_t bufsz, |
| ion_phys_addr_t *paddr, size_t *pa_len, void **vaddr) |
| { |
| int rc = 0; |
| if (!name || !client || !handle || !paddr || !vaddr || !pa_len) { |
| pr_err("%s: Invalid params\n", __func__); |
| rc = -EINVAL; |
| goto err; |
| } |
| |
| *client = msm_audio_ion_client_create(UINT_MAX, name); |
| if (IS_ERR_OR_NULL((void *)(*client))) { |
| pr_err("%s: ION create client for AUDIO failed\n", __func__); |
| rc = -EINVAL; |
| goto err; |
| } |
| |
| /* name should be audio_acdb_client or Audio_Dec_Client, |
| bufsz should be 0 and fd shouldn't be 0 as of now |
| */ |
| *handle = ion_import_dma_buf(*client, fd); |
| pr_err("%s: DMA Buf name=%s, fd=%d handle=%p\n", __func__, |
| name, fd, *handle); |
| if (IS_ERR_OR_NULL((void *) (*handle))) { |
| pr_err("%s: ion import dma buffer failed\n", |
| __func__); |
| rc = -EINVAL; |
| goto err_destroy_client; |
| } |
| |
| if (ionflag != NULL) { |
| rc = ion_handle_get_flags(*client, *handle, ionflag); |
| if (rc) { |
| pr_err("%s: could not get flags for the handle\n", |
| __func__); |
| goto err_ion_handle; |
| } |
| } |
| |
| rc = msm_audio_ion_get_phys(*client, *handle, paddr, pa_len); |
| if (rc) { |
| pr_err("%s: ION Get Physical for AUDIO failed, rc = %d\n", |
| __func__, rc); |
| goto err_ion_handle; |
| } |
| |
| *vaddr = ion_map_kernel(*client, *handle); |
| if (IS_ERR_OR_NULL((void *)*vaddr)) { |
| pr_err("%s: ION memory mapping for AUDIO failed\n", __func__); |
| rc = -ENOMEM; |
| goto err_ion_handle; |
| } |
| pr_debug("%s: mapped address = %p, size=%d\n", __func__, *vaddr, bufsz); |
| |
| return 0; |
| |
| err_ion_handle: |
| ion_free(*client, *handle); |
| err_destroy_client: |
| msm_audio_ion_client_destroy(*client); |
| *client = NULL; |
| *handle = NULL; |
| err: |
| return rc; |
| } |
| |
| int msm_audio_ion_free(struct ion_client *client, struct ion_handle *handle) |
| { |
| if (!client || !handle) { |
| pr_err("%s Invalid params\n", __func__); |
| return -EINVAL; |
| } |
| if (msm_audio_ion_data.smmu_enabled) { |
| /* Need to populate book kept infomation */ |
| pr_debug("client=%p, domain=%p, domain_id=%d, group=%p", |
| client, msm_audio_ion_data.domain, |
| msm_audio_ion_data.domain_id, msm_audio_ion_data.group); |
| |
| ion_unmap_iommu(client, handle, |
| msm_audio_ion_data.domain_id, 0); |
| } |
| |
| ion_unmap_kernel(client, handle); |
| |
| ion_free(client, handle); |
| msm_audio_ion_client_destroy(client); |
| return 0; |
| } |
| |
| int msm_audio_ion_mmap(struct audio_buffer *ab, |
| struct vm_area_struct *vma) |
| { |
| struct sg_table *table; |
| unsigned long addr = vma->vm_start; |
| unsigned long offset = vma->vm_pgoff * PAGE_SIZE; |
| struct scatterlist *sg; |
| unsigned int i; |
| struct page *page; |
| int ret; |
| |
| pr_debug("%s\n", __func__); |
| |
| table = ion_sg_table(ab->client, ab->handle); |
| |
| if (IS_ERR(table)) { |
| pr_err("%s: Unable to get sg_table from ion: %ld\n", |
| __func__, PTR_ERR(table)); |
| return PTR_ERR(table); |
| } else if (!table) { |
| pr_err("%s: sg_list is NULL\n", __func__); |
| return -EINVAL; |
| } |
| |
| /* uncached */ |
| vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot); |
| |
| /* We need to check if a page is associated with this sg list because: |
| * If the allocation came from a carveout we currently don't have |
| * pages associated with carved out memory. This might change in the |
| * future and we can remove this check and the else statement. |
| */ |
| page = sg_page(table->sgl); |
| if (page) { |
| pr_debug("%s: page is NOT null\n", __func__); |
| for_each_sg(table->sgl, sg, table->nents, i) { |
| unsigned long remainder = vma->vm_end - addr; |
| unsigned long len = sg_dma_len(sg); |
| |
| page = sg_page(sg); |
| |
| if (offset >= sg_dma_len(sg)) { |
| offset -= sg_dma_len(sg); |
| continue; |
| } else if (offset) { |
| page += offset / PAGE_SIZE; |
| len = sg_dma_len(sg) - offset; |
| offset = 0; |
| } |
| len = min(len, remainder); |
| pr_debug("vma=%p, addr=%x len=%ld vm_start=%x vm_end=%x vm_page_prot=%ld\n", |
| vma, (unsigned int)addr, len, |
| (unsigned int)vma->vm_start, |
| (unsigned int)vma->vm_end, |
| (unsigned long int)vma->vm_page_prot); |
| remap_pfn_range(vma, addr, page_to_pfn(page), len, |
| vma->vm_page_prot); |
| addr += len; |
| if (addr >= vma->vm_end) |
| return 0; |
| } |
| } else { |
| ion_phys_addr_t phys_addr; |
| size_t phys_len; |
| size_t va_len = 0; |
| pr_debug("%s: page is NULL\n", __func__); |
| |
| ret = ion_phys(ab->client, ab->handle, &phys_addr, &phys_len); |
| if (ret) { |
| pr_err("%s: Unable to get phys address from ION buffer: %d\n" |
| , __func__ , ret); |
| return ret; |
| } |
| pr_debug("phys=%x len=%d\n", (unsigned int)phys_addr, phys_len); |
| pr_debug("vma=%p, vm_start=%x vm_end=%x vm_pgoff=%ld vm_page_prot=%ld\n", |
| vma, (unsigned int)vma->vm_start, |
| (unsigned int)vma->vm_end, vma->vm_pgoff, |
| (unsigned long int)vma->vm_page_prot); |
| va_len = vma->vm_end - vma->vm_start; |
| if ((offset > phys_len) || (va_len > phys_len-offset)) { |
| pr_err("wrong offset size %ld, lens= %d, va_len=%d\n", |
| offset, phys_len, va_len); |
| return -EINVAL; |
| } |
| ret = remap_pfn_range(vma, vma->vm_start, |
| __phys_to_pfn(phys_addr) + vma->vm_pgoff, |
| vma->vm_end - vma->vm_start, |
| vma->vm_page_prot); |
| } |
| return 0; |
| } |
| |
| |
| bool msm_audio_ion_is_smmu_available(void) |
| { |
| return msm_audio_ion_data.smmu_enabled; |
| } |
| |
| /* move to static section again */ |
| struct ion_client *msm_audio_ion_client_create(unsigned int heap_mask, |
| const char *name) |
| { |
| struct ion_client *pclient = NULL; |
| /*IOMMU group and domain are moved to probe()*/ |
| pclient = msm_ion_client_create(heap_mask, name); |
| return pclient; |
| } |
| |
| |
| void msm_audio_ion_client_destroy(struct ion_client *client) |
| { |
| pr_debug("%s: client = %p smmu_enabled = %d\n", __func__, |
| client, msm_audio_ion_data.smmu_enabled); |
| |
| ion_client_destroy(client); |
| } |
| |
| int msm_audio_ion_import_legacy(const char *name, struct ion_client *client, |
| struct ion_handle **handle, int fd, |
| unsigned long *ionflag, size_t bufsz, |
| ion_phys_addr_t *paddr, size_t *pa_len, void **vaddr) |
| { |
| int rc = 0; |
| if (!name || !client || !handle || !paddr || !vaddr || !pa_len) { |
| pr_err("%s: Invalid params\n", __func__); |
| rc = -EINVAL; |
| goto err; |
| } |
| /* client is already created for legacy and given*/ |
| /* name should be audio_acdb_client or Audio_Dec_Client, |
| bufsz should be 0 and fd shouldn't be 0 as of now |
| */ |
| *handle = ion_import_dma_buf(client, fd); |
| pr_debug("%s: DMA Buf name=%s, fd=%d handle=%p\n", __func__, |
| name, fd, *handle); |
| if (IS_ERR_OR_NULL((void *)(*handle))) { |
| pr_err("%s: ion import dma buffer failed\n", |
| __func__); |
| rc = -EINVAL; |
| goto err_destroy_client; |
| } |
| |
| if (ionflag != NULL) { |
| rc = ion_handle_get_flags(client, *handle, ionflag); |
| if (rc) { |
| pr_err("%s: could not get flags for the handle\n", |
| __func__); |
| rc = -EINVAL; |
| goto err_ion_handle; |
| } |
| } |
| |
| rc = msm_audio_ion_get_phys(client, *handle, paddr, pa_len); |
| if (rc) { |
| pr_err("%s: ION Get Physical for AUDIO failed, rc = %d\n", |
| __func__, rc); |
| rc = -EINVAL; |
| goto err_ion_handle; |
| } |
| |
| /*Need to add condition SMMU enable or not */ |
| *vaddr = ion_map_kernel(client, *handle); |
| if (IS_ERR_OR_NULL((void *)*vaddr)) { |
| pr_err("%s: ION memory mapping for AUDIO failed\n", __func__); |
| rc = -EINVAL; |
| goto err_ion_handle; |
| } |
| |
| if (bufsz != 0) |
| memset((void *)*vaddr, 0, bufsz); |
| |
| return 0; |
| |
| err_ion_handle: |
| ion_free(client, *handle); |
| err_destroy_client: |
| msm_audio_ion_client_destroy(client); |
| client = NULL; |
| *handle = NULL; |
| err: |
| return rc; |
| } |
| |
| int msm_audio_ion_free_legacy(struct ion_client *client, |
| struct ion_handle *handle) |
| { |
| /* To add condition for SMMU enabled */ |
| ion_unmap_kernel(client, handle); |
| |
| ion_free(client, handle); |
| /* no client_destrody in legacy*/ |
| return 0; |
| } |
| |
| int msm_audio_ion_cache_operations(struct audio_buffer *abuff, int cache_op) |
| { |
| unsigned long ionflag = 0; |
| int rc = 0; |
| int msm_cache_ops = 0; |
| |
| if (!abuff) { |
| pr_err("Invalid params: %p, %p\n", __func__, abuff); |
| return -EINVAL; |
| } |
| rc = ion_handle_get_flags(abuff->client, abuff->handle, |
| &ionflag); |
| if (rc) { |
| pr_err("ion_handle_get_flags failed: %d\n", rc); |
| goto cache_op_failed; |
| } |
| |
| /* has to be CACHED */ |
| if (ION_IS_CACHED(ionflag)) { |
| /* ION_IOC_INV_CACHES or ION_IOC_CLEAN_CACHES */ |
| msm_cache_ops = cache_op; |
| rc = msm_ion_do_cache_op(abuff->client, |
| abuff->handle, |
| (unsigned long *) abuff->data, |
| (unsigned long)abuff->size, |
| msm_cache_ops); |
| if (rc) { |
| pr_err("cache operation failed %d\n", rc); |
| goto cache_op_failed; |
| } |
| } |
| cache_op_failed: |
| return rc; |
| } |
| |
| |
| static int msm_audio_ion_get_phys(struct ion_client *client, |
| struct ion_handle *handle, |
| ion_phys_addr_t *addr, size_t *len) |
| { |
| int rc = 0; |
| pr_debug("%s: smmu_enabled = %d\n", __func__, |
| msm_audio_ion_data.smmu_enabled); |
| |
| if (msm_audio_ion_data.smmu_enabled) { |
| rc = ion_map_iommu(client, handle, msm_audio_ion_data.domain_id, |
| 0 /*partition_num*/, SZ_4K /*align*/, 0/*iova_length*/, |
| addr, (unsigned long *)len, |
| 0, 0); |
| if (rc) { |
| pr_err("%s: ION map iommu failed %d\n", __func__, rc); |
| return rc; |
| } |
| pr_debug("client=%p, domain=%p, domain_id=%d, group=%p", |
| client, msm_audio_ion_data.domain, |
| msm_audio_ion_data.domain_id, msm_audio_ion_data.group); |
| } else { |
| /* SMMU is disabled*/ |
| rc = ion_phys(client, handle, addr, len); |
| } |
| pr_debug("phys=%x, len=%d, rc=%d\n", (unsigned int)*addr, *len, rc); |
| return rc; |
| } |
| |
| static int msm_audio_ion_probe(struct platform_device *pdev) |
| { |
| int rc = 0; |
| const char *msm_audio_ion_dt = "qcom,smmu-enabled"; |
| bool smmu_enabled; |
| |
| if (pdev->dev.of_node == NULL) { |
| pr_err("%s: device tree is not found\n", __func__); |
| msm_audio_ion_data.smmu_enabled = 0; |
| return 0; |
| } |
| |
| smmu_enabled = of_property_read_bool(pdev->dev.of_node, |
| msm_audio_ion_dt); |
| msm_audio_ion_data.smmu_enabled = smmu_enabled; |
| |
| if (smmu_enabled) { |
| msm_audio_ion_data.group = iommu_group_find("lpass_audio"); |
| if (!msm_audio_ion_data.group) { |
| pr_debug("Failed to find group lpass_audio deferred\n"); |
| goto fail_group; |
| } |
| msm_audio_ion_data.domain = |
| iommu_group_get_iommudata(msm_audio_ion_data.group); |
| if (IS_ERR_OR_NULL(msm_audio_ion_data.domain)) { |
| pr_err("Failed to get domain data for group %p", |
| msm_audio_ion_data.group); |
| goto fail_group; |
| } |
| msm_audio_ion_data.domain_id = |
| msm_find_domain_no(msm_audio_ion_data.domain); |
| if (msm_audio_ion_data.domain_id < 0) { |
| pr_err("Failed to get domain index for domain %p", |
| msm_audio_ion_data.domain); |
| goto fail_group; |
| } |
| pr_debug("domain=%p, domain_id=%d, group=%p", |
| msm_audio_ion_data.domain, |
| msm_audio_ion_data.domain_id, msm_audio_ion_data.group); |
| |
| /* iommu_attach_group() will make AXI clock ON. For future PL |
| this will require to be called in once per session */ |
| rc = iommu_attach_group(msm_audio_ion_data.domain, |
| msm_audio_ion_data.group); |
| if (rc) { |
| pr_err("%s:ION attach group failed %d\n", __func__, rc); |
| return rc; |
| } |
| |
| } |
| |
| pr_debug("%s: SMMU-Enabled = %d\n", __func__, smmu_enabled); |
| return rc; |
| |
| fail_group: |
| return -EPROBE_DEFER; |
| } |
| |
| static int msm_audio_ion_remove(struct platform_device *pdev) |
| { |
| pr_debug("%s: msm audio ion is unloaded, domain=%p, group=%p\n", |
| __func__, msm_audio_ion_data.domain, msm_audio_ion_data.group); |
| iommu_detach_group(msm_audio_ion_data.domain, msm_audio_ion_data.group); |
| |
| return 0; |
| } |
| |
| static const struct of_device_id msm_audio_ion_dt_match[] = { |
| { .compatible = "qcom,msm-audio-ion" }, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(of, msm_audio_ion_dt_match); |
| |
| static struct platform_driver msm_audio_ion_driver = { |
| .driver = { |
| .name = "msm-audio-ion", |
| .owner = THIS_MODULE, |
| .of_match_table = msm_audio_ion_dt_match, |
| }, |
| .probe = msm_audio_ion_probe, |
| .remove = __devexit_p(msm_audio_ion_remove), |
| }; |
| |
| static int __init msm_audio_ion_init(void) |
| { |
| return platform_driver_register(&msm_audio_ion_driver); |
| } |
| module_init(msm_audio_ion_init); |
| |
| static void __exit msm_audio_ion_exit(void) |
| { |
| platform_driver_unregister(&msm_audio_ion_driver); |
| } |
| module_exit(msm_audio_ion_exit); |
| |
| MODULE_DESCRIPTION("MSM Audio ION module"); |
| MODULE_LICENSE("GPL v2"); |