[PATCH 1/9] dspbridge: replace iommu custom for opensource implementation
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From: Fernando Guzman Lugo on 30 Jun 2010 20:20 This patch replace the call to custom dsp mmu implemenation for the once on iommu module. Signed-off-by: Fernando Guzman Lugo <x0095840(a)ti.com> --- drivers/dsp/bridge/core/_tiomap.h | 16 + drivers/dsp/bridge/core/io_sm.c | 114 ++------ drivers/dsp/bridge/core/tiomap3430.c | 501 +++++----------------------------- drivers/dsp/bridge/core/ue_deh.c | 10 - 4 files changed, 118 insertions(+), 523 deletions(-) diff --git a/drivers/dsp/bridge/core/_tiomap.h b/drivers/dsp/bridge/core/_tiomap.h index bf0164e..d13677a 100644 --- a/drivers/dsp/bridge/core/_tiomap.h +++ b/drivers/dsp/bridge/core/_tiomap.h @@ -23,6 +23,8 @@ #include <plat/clockdomain.h> #include <mach-omap2/prm-regbits-34xx.h> #include <mach-omap2/cm-regbits-34xx.h> +#include <plat/iommu.h> +#include <plat/iovmm.h> #include <dspbridge/devdefs.h> #include <hw_defs.h> #include <dspbridge/dspioctl.h> /* for bridge_ioctl_extproc defn */ @@ -330,6 +332,7 @@ struct bridge_dev_context { u32 dw_internal_size; /* Internal memory size */ struct omap_mbox *mbox; /* Mail box handle */ + struct iommu *dsp_mmu; /* iommu for iva2 handler */ struct cfg_hostres *resources; /* Host Resources */ @@ -374,4 +377,17 @@ extern s32 dsp_debug; */ int sm_interrupt_dsp(struct bridge_dev_context *dev_context, u16 mb_val); +static inline void dsp_iotlb_init(struct iotlb_entry *e, u32 da, u32 pa, + u32 pgsz) +{ + e->da = da; + e->pa = pa; + e->valid = 1; + e->prsvd = 1; + e->pgsz = pgsz & MMU_CAM_PGSZ_MASK; + e->endian = MMU_RAM_ENDIAN_LITTLE; + e->elsz = MMU_RAM_ELSZ_32; + e->mixed = 0; +} + #endif /* _TIOMAP_ */ diff --git a/drivers/dsp/bridge/core/io_sm.c b/drivers/dsp/bridge/core/io_sm.c index 7fb840d..1f47f8b 100644 --- a/drivers/dsp/bridge/core/io_sm.c +++ b/drivers/dsp/bridge/core/io_sm.c @@ -290,6 +290,8 @@ int bridge_io_on_loaded(struct io_mgr *hio_mgr) struct cod_manager *cod_man; struct chnl_mgr *hchnl_mgr; struct msg_mgr *hmsg_mgr; + struct iommu *mmu; + struct iotlb_entry e; u32 ul_shm_base; u32 ul_shm_base_offset; u32 ul_shm_limit; @@ -312,7 +314,6 @@ int bridge_io_on_loaded(struct io_mgr *hio_mgr) struct bridge_ioctl_extproc ae_proc[BRDIOCTL_NUMOFMMUTLB]; struct cfg_hostres *host_res; struct bridge_dev_context *pbridge_context; - u32 map_attrs; u32 shm0_end; u32 ul_dyn_ext_base; u32 ul_seg1_size = 0; @@ -336,6 +337,21 @@ int bridge_io_on_loaded(struct io_mgr *hio_mgr) status = -EFAULT; goto func_end; } + + mmu = pbridge_context->dsp_mmu; + + if (mmu) + iommu_put(mmu); + mmu = iommu_get("iva2"); + + if (IS_ERR_OR_NULL(mmu)) { + pr_err("Error in iommu_get\n"); + pbridge_context->dsp_mmu = NULL; + status = -EFAULT; + goto func_end; + } + pbridge_context->dsp_mmu = mmu; + status = dev_get_cod_mgr(hio_mgr->hdev_obj, &cod_man); if (!cod_man) { status = -EFAULT; @@ -477,55 +493,16 @@ int bridge_io_on_loaded(struct io_mgr *hio_mgr) gpp_va_curr = ul_gpp_va; num_bytes = ul_seg1_size; - /* - * Try to fit into TLB entries. If not possible, push them to page - * tables. It is quite possible that if sections are not on - * bigger page boundary, we may end up making several small pages. - * So, push them onto page tables, if that is the case. - */ - map_attrs = 0x00000000; - map_attrs = DSP_MAPLITTLEENDIAN; - map_attrs |= DSP_MAPPHYSICALADDR; - map_attrs |= DSP_MAPELEMSIZE32; - map_attrs |= DSP_MAPDONOTLOCK; - - while (num_bytes) { - /* - * To find the max. page size with which both PA & VA are - * aligned. - */ - all_bits = pa_curr | va_curr; - dev_dbg(bridge, "all_bits %x, pa_curr %x, va_curr %x, " - "num_bytes %x\n", all_bits, pa_curr, va_curr, - num_bytes); - for (i = 0; i < 4; i++) { - if ((num_bytes >= page_size[i]) && ((all_bits & - (page_size[i] - - 1)) == 0)) { - status = - hio_mgr->intf_fxns-> - pfn_brd_mem_map(hio_mgr->hbridge_context, - pa_curr, va_curr, - page_size[i], map_attrs, - NULL); - if (DSP_FAILED(status)) - goto func_end; - pa_curr += page_size[i]; - va_curr += page_size[i]; - gpp_va_curr += page_size[i]; - num_bytes -= page_size[i]; - /* - * Don't try smaller sizes. Hopefully we have - * reached an address aligned to a bigger page - * size. - */ - break; - } - } + va_curr = iommu_kmap(mmu, va_curr, pa_curr, num_bytes, + IOVMF_ENDIAN_LITTLE | IOVMF_ELSZ_32); + if (IS_ERR_VALUE(va_curr)) { + status = (int)va_curr; + goto func_end; } - pa_curr += ul_pad_size; - va_curr += ul_pad_size; - gpp_va_curr += ul_pad_size; + + pa_curr += ul_pad_size + num_bytes; + va_curr += ul_pad_size + num_bytes; + gpp_va_curr += ul_pad_size + num_bytes; /* Configure the TLB entries for the next cacheable segment */ num_bytes = ul_seg_size; @@ -567,22 +544,6 @@ int bridge_io_on_loaded(struct io_mgr *hio_mgr) ae_proc[ndx].ul_dsp_va * hio_mgr->word_size, page_size[i]); ndx++; - } else { - status = - hio_mgr->intf_fxns-> - pfn_brd_mem_map(hio_mgr->hbridge_context, - pa_curr, va_curr, - page_size[i], map_attrs, - NULL); - dev_dbg(bridge, - "shm MMU PTE entry PA %x" - " VA %x DSP_VA %x Size %x\n", - ae_proc[ndx].ul_gpp_pa, - ae_proc[ndx].ul_gpp_va, - ae_proc[ndx].ul_dsp_va * - hio_mgr->word_size, page_size[i]); - if (DSP_FAILED(status)) - goto func_end; } pa_curr += page_size[i]; va_curr += page_size[i]; @@ -635,35 +596,20 @@ int bridge_io_on_loaded(struct io_mgr *hio_mgr) "DSP_VA 0x%x\n", ae_proc[ndx].ul_gpp_pa, ae_proc[ndx].ul_dsp_va); ndx++; - } else { - status = hio_mgr->intf_fxns->pfn_brd_mem_map - (hio_mgr->hbridge_context, - hio_mgr->ext_proc_info.ty_tlb[i]. - ul_gpp_phys, - hio_mgr->ext_proc_info.ty_tlb[i]. - ul_dsp_virt, 0x100000, map_attrs, - NULL); } } if (DSP_FAILED(status)) goto func_end; } - map_attrs = 0x00000000; - map_attrs = DSP_MAPLITTLEENDIAN; - map_attrs |= DSP_MAPPHYSICALADDR; - map_attrs |= DSP_MAPELEMSIZE32; - map_attrs |= DSP_MAPDONOTLOCK; + dsp_iotlb_init(&e, 0, 0, IOVMF_PGSZ_4K); /* Map the L4 peripherals */ i = 0; while (l4_peripheral_table[i].phys_addr) { - status = hio_mgr->intf_fxns->pfn_brd_mem_map - (hio_mgr->hbridge_context, l4_peripheral_table[i].phys_addr, - l4_peripheral_table[i].dsp_virt_addr, HW_PAGE_SIZE4KB, - map_attrs, NULL); - if (DSP_FAILED(status)) - goto func_end; + e.da = l4_peripheral_table[i].dsp_virt_addr; + e.pa = l4_peripheral_table[i].phys_addr; + iopgtable_store_entry(mmu, &e); i++; } diff --git a/drivers/dsp/bridge/core/tiomap3430.c b/drivers/dsp/bridge/core/tiomap3430.c index 35c6678..e750767 100644 --- a/drivers/dsp/bridge/core/tiomap3430.c +++ b/drivers/dsp/bridge/core/tiomap3430.c @@ -373,6 +373,8 @@ static int bridge_brd_start(struct bridge_dev_context *hDevContext, { int status = 0; struct bridge_dev_context *dev_context = hDevContext; + struct iommu *mmu; + struct iotlb_entry en; u32 dw_sync_addr = 0; u32 ul_shm_base; /* Gpp Phys SM base addr(byte) */ u32 ul_shm_base_virt; /* Dsp Virt SM base addr */ @@ -392,6 +394,8 @@ static int bridge_brd_start(struct bridge_dev_context *hDevContext, struct dspbridge_platform_data *pdata = omap_dspbridge_dev->dev.platform_data; + mmu = dev_context->dsp_mmu; + /* The device context contains all the mmu setup info from when the * last dsp base image was loaded. The first entry is always * SHMMEM base. */ @@ -442,30 +446,10 @@ static int bridge_brd_start(struct bridge_dev_context *hDevContext, } } if (DSP_SUCCEEDED(status)) { - /* Reset and Unreset the RST2, so that BOOTADDR is copied to - * IVA2 SYSC register */ - (*pdata->dsp_prm_rmw_bits)(OMAP3430_RST2_IVA2, - OMAP3430_RST2_IVA2, OMAP3430_IVA2_MOD, RM_RSTCTRL); - udelay(100); - (*pdata->dsp_prm_rmw_bits)(OMAP3430_RST2_IVA2, 0, - OMAP3430_IVA2_MOD, RM_RSTCTRL); - udelay(100); - - /* Disbale the DSP MMU */ - hw_mmu_disable(resources->dw_dmmu_base); - /* Disable TWL */ - hw_mmu_twl_disable(resources->dw_dmmu_base); - /* Only make TLB entry if both addresses are non-zero */ for (entry_ndx = 0; entry_ndx < BRDIOCTL_NUMOFMMUTLB; entry_ndx++) { struct bridge_ioctl_extproc *e = &dev_context->atlb_entry[entry_ndx]; - struct hw_mmu_map_attrs_t map_attrs = { - .endianism = e->endianism, - .element_size = e->elem_size, - .mixed_size = e->mixed_mode, - }; - if (!e->ul_gpp_pa || !e->ul_dsp_va) continue; @@ -476,13 +460,9 @@ static int bridge_brd_start(struct bridge_dev_context *hDevContext, e->ul_dsp_va, e->ul_size); - hw_mmu_tlb_add(dev_context->dw_dsp_mmu_base, - e->ul_gpp_pa, - e->ul_dsp_va, - e->ul_size, - itmp_entry_ndx, - &map_attrs, 1, 1); - + dsp_iotlb_init(&en, e->ul_dsp_va, e->ul_gpp_pa, + bytes_to_iopgsz(e->ul_size)); + iopgtable_store_entry(mmu, &en); itmp_entry_ndx++; } } @@ -490,19 +470,6 @@ static int bridge_brd_start(struct bridge_dev_context *hDevContext, /* Lock the above TLB entries and get the BIOS and load monitor timer * information */ if (DSP_SUCCEEDED(status)) { - hw_mmu_num_locked_set(resources->dw_dmmu_base, itmp_entry_ndx); - hw_mmu_victim_num_set(resources->dw_dmmu_base, itmp_entry_ndx); - hw_mmu_ttb_set(resources->dw_dmmu_base, - dev_context->pt_attrs->l1_base_pa); - hw_mmu_twl_enable(resources->dw_dmmu_base); - /* Enable the SmartIdle and AutoIdle bit for MMU_SYSCONFIG */ - - temp = __raw_readl((resources->dw_dmmu_base) + 0x10); - temp = (temp & 0xFFFFFFEF) | 0x11; - __raw_writel(temp, (resources->dw_dmmu_base) + 0x10); - - /* Let the DSP MMU run */ - hw_mmu_enable(resources->dw_dmmu_base); /* Enable the BIOS clock */ (void)dev_get_symbol(dev_context->hdev_obj, @@ -510,9 +477,6 @@ static int bridge_brd_start(struct bridge_dev_context *hDevContext, (void)dev_get_symbol(dev_context->hdev_obj, BRIDGEINIT_LOADMON_GPTIMER, &ul_load_monitor_timer); - } - - if (DSP_SUCCEEDED(status)) { if (ul_load_monitor_timer != 0xFFFF) { clk_cmd = (BPWR_ENABLE_CLOCK << MBX_PM_CLK_CMDSHIFT) | ul_load_monitor_timer; @@ -593,9 +557,6 @@ static int bridge_brd_start(struct bridge_dev_context *hDevContext, /* Let DSP go */ dev_dbg(bridge, "%s Unreset\n", __func__); - /* Enable DSP MMU Interrupts */ - hw_mmu_event_enable(resources->dw_dmmu_base, - HW_MMU_ALL_INTERRUPTS); /* release the RST1, DSP starts executing now .. */ (*pdata->dsp_prm_rmw_bits)(OMAP3430_RST1_IVA2, 0, OMAP3430_IVA2_MOD, RM_RSTCTRL); @@ -754,6 +715,9 @@ static int bridge_brd_delete(struct bridge_dev_context *hDevContext) omap_mbox_put(dev_context->mbox); dev_context->mbox = NULL; } + + if (dev_context->dsp_mmu) + dev_context->dsp_mmu = (iommu_put(dev_context->dsp_mmu), NULL); /* Reset IVA2 clocks*/ (*pdata->dsp_prm_write)(OMAP3430_RST1_IVA2 | OMAP3430_RST2_IVA2 | OMAP3430_RST3_IVA2, OMAP3430_IVA2_MOD, RM_RSTCTRL); @@ -1199,219 +1163,67 @@ static int bridge_brd_mem_write(struct bridge_dev_context *hDevContext, * * TODO: Disable MMU while updating the page tables (but that'll stall DSP) */ -static int bridge_brd_mem_map(struct bridge_dev_context *hDevContext, - u32 ul_mpu_addr, u32 ulVirtAddr, - u32 ul_num_bytes, u32 ul_map_attr, - struct page **mapped_pages) +static int bridge_brd_mem_map(struct bridge_dev_context *dev_ctx, + u32 uva, u32 da, u32 size, u32 attr, + struct page **usr_pgs) { - u32 attrs; - int status = 0; - struct bridge_dev_context *dev_context = hDevContext; - struct hw_mmu_map_attrs_t hw_attrs; + int res, w; + unsigned pages, i; + struct iommu *mmu = dev_ctx->dsp_mmu; struct vm_area_struct *vma; struct mm_struct *mm = current->mm; - u32 write = 0; - u32 num_usr_pgs = 0; - struct page *mapped_page, *pg; - s32 pg_num; - u32 va = ulVirtAddr; - struct task_struct *curr_task = current; - u32 pg_i = 0; - u32 mpu_addr, pa; - - dev_dbg(bridge, - "%s hDevCtxt %p, pa %x, va %x, size %x, ul_map_attr %x\n", - __func__, hDevContext, ul_mpu_addr, ulVirtAddr, ul_num_bytes, - ul_map_attr); - if (ul_num_bytes == 0) - return -EINVAL; + struct sg_table *sgt; + struct scatterlist *sg; - if (ul_map_attr & DSP_MAP_DIR_MASK) { - attrs = ul_map_attr; - } else { - /* Assign default attributes */ - attrs = ul_map_attr | (DSP_MAPVIRTUALADDR | DSP_MAPELEMSIZE16); - } - /* Take mapping properties */ - if (attrs & DSP_MAPBIGENDIAN) - hw_attrs.endianism = HW_BIG_ENDIAN; - else - hw_attrs.endianism = HW_LITTLE_ENDIAN; - - hw_attrs.mixed_size = (enum hw_mmu_mixed_size_t) - ((attrs & DSP_MAPMIXEDELEMSIZE) >> 2); - /* Ignore element_size if mixed_size is enabled */ - if (hw_attrs.mixed_size == 0) { - if (attrs & DSP_MAPELEMSIZE8) { - /* Size is 8 bit */ - hw_attrs.element_size = HW_ELEM_SIZE8BIT; - } else if (attrs & DSP_MAPELEMSIZE16) { - /* Size is 16 bit */ - hw_attrs.element_size = HW_ELEM_SIZE16BIT; - } else if (attrs & DSP_MAPELEMSIZE32) { - /* Size is 32 bit */ - hw_attrs.element_size = HW_ELEM_SIZE32BIT; - } else if (attrs & DSP_MAPELEMSIZE64) { - /* Size is 64 bit */ - hw_attrs.element_size = HW_ELEM_SIZE64BIT; - } else { - /* - * Mixedsize isn't enabled, so size can't be - * zero here - */ - return -EINVAL; - } - } - if (attrs & DSP_MAPDONOTLOCK) - hw_attrs.donotlockmpupage = 1; - else - hw_attrs.donotlockmpupage = 0; + if (!size || !usr_pgs) + return -EINVAL; - if (attrs & DSP_MAPVMALLOCADDR) { - return mem_map_vmalloc(hDevContext, ul_mpu_addr, ulVirtAddr, - ul_num_bytes, &hw_attrs); - } - /* - * Do OS-specific user-va to pa translation. - * Combine physically contiguous regions to reduce TLBs. - * Pass the translated pa to pte_update. - */ - if ((attrs & DSP_MAPPHYSICALADDR)) { - status = pte_update(dev_context, ul_mpu_addr, ulVirtAddr, - ul_num_bytes, &hw_attrs); - goto func_cont; - } + pages = size / PG_SIZE4K; - /* - * Important Note: ul_mpu_addr is mapped from user application process - * to current process - it must lie completely within the current - * virtual memory address space in order to be of use to us here! - */ down_read(&mm->mmap_sem); - vma = find_vma(mm, ul_mpu_addr); - if (vma) - dev_dbg(bridge, - "VMAfor UserBuf: ul_mpu_addr=%x, ul_num_bytes=%x, " - "vm_start=%lx, vm_end=%lx, vm_flags=%lx\n", ul_mpu_addr, - ul_num_bytes, vma->vm_start, vma->vm_end, - vma->vm_flags); - - /* - * It is observed that under some circumstances, the user buffer is - * spread across several VMAs. So loop through and check if the entire - * user buffer is covered - */ - while ((vma) && (ul_mpu_addr + ul_num_bytes > vma->vm_end)) { - /* jump to the next VMA region */ + vma = find_vma(mm, uva); + while (vma && (uva + size > vma->vm_end)) vma = find_vma(mm, vma->vm_end + 1); - dev_dbg(bridge, - "VMA for UserBuf ul_mpu_addr=%x ul_num_bytes=%x, " - "vm_start=%lx, vm_end=%lx, vm_flags=%lx\n", ul_mpu_addr, - ul_num_bytes, vma->vm_start, vma->vm_end, - vma->vm_flags); - } + if (!vma) { pr_err("%s: Failed to get VMA region for 0x%x (%d)\n", - __func__, ul_mpu_addr, ul_num_bytes); - status = -EINVAL; + __func__, uva, size); up_read(&mm->mmap_sem); - goto func_cont; + return -EINVAL; } + if (vma->vm_flags & (VM_WRITE | VM_MAYWRITE)) + w = 1; + res = get_user_pages(current, mm, uva, pages, w, 1, usr_pgs, NULL); + up_read(&mm->mmap_sem); + if (res < 0) + return res; - if (vma->vm_flags & VM_IO) { - num_usr_pgs = ul_num_bytes / PG_SIZE4K; - mpu_addr = ul_mpu_addr; - - /* Get the physical addresses for user buffer */ - for (pg_i = 0; pg_i < num_usr_pgs; pg_i++) { - pa = user_va2_pa(mm, mpu_addr); - if (!pa) { - status = -EPERM; - pr_err("DSPBRIDGE: VM_IO mapping physical" - "address is invalid\n"); - break; - } - if (pfn_valid(__phys_to_pfn(pa))) { - pg = PHYS_TO_PAGE(pa); - get_page(pg); - if (page_count(pg) < 1) { - pr_err("Bad page in VM_IO buffer\n"); - bad_page_dump(pa, pg); - } - } - status = pte_set(dev_context->pt_attrs, pa, - va, HW_PAGE_SIZE4KB, &hw_attrs); - if (DSP_FAILED(status)) - break; + sgt = kzalloc(sizeof(*sgt), GFP_KERNEL); - va += HW_PAGE_SIZE4KB; - mpu_addr += HW_PAGE_SIZE4KB; - pa += HW_PAGE_SIZE4KB; - } - } else { - num_usr_pgs = ul_num_bytes / PG_SIZE4K; - if (vma->vm_flags & (VM_WRITE | VM_MAYWRITE)) - write = 1; - - for (pg_i = 0; pg_i < num_usr_pgs; pg_i++) { - pg_num = get_user_pages(curr_task, mm, ul_mpu_addr, 1, - write, 1, &mapped_page, NULL); - if (pg_num > 0) { - if (page_count(mapped_page) < 1) { - pr_err("Bad page count after doing" - "get_user_pages on" - "user buffer\n"); - bad_page_dump(page_to_phys(mapped_page), - mapped_page); - } - status = pte_set(dev_context->pt_attrs, - page_to_phys(mapped_page), va, - HW_PAGE_SIZE4KB, &hw_attrs); - if (DSP_FAILED(status)) - break; - - if (mapped_pages) - mapped_pages[pg_i] = mapped_page; - - va += HW_PAGE_SIZE4KB; - ul_mpu_addr += HW_PAGE_SIZE4KB; - } else { - pr_err("DSPBRIDGE: get_user_pages FAILED," - "MPU addr = 0x%x," - "vma->vm_flags = 0x%lx," - "get_user_pages Err" - "Value = %d, Buffer" - "size=0x%x\n", ul_mpu_addr, - vma->vm_flags, pg_num, ul_num_bytes); - status = -EPERM; - break; - } - } - } - up_read(&mm->mmap_sem); -func_cont: - if (DSP_SUCCEEDED(status)) { - status = 0; - } else { - /* - * Roll out the mapped pages incase it failed in middle of - * mapping - */ - if (pg_i) { - bridge_brd_mem_un_map(dev_context, ulVirtAddr, - (pg_i * PG_SIZE4K)); - } - status = -EPERM; + if (!sgt) + return -ENOMEM; + + res = sg_alloc_table(sgt, pages, GFP_KERNEL); + + if (res < 0) + goto err_sg; + + for_each_sg(sgt->sgl, sg, sgt->nents, i) + sg_set_page(sg, usr_pgs[i], PAGE_SIZE, 0); + + da = iommu_vmap(mmu, da, sgt, IOVMF_ENDIAN_LITTLE | IOVMF_ELSZ_32); + + if (IS_ERR_VALUE(da)) { + res = (int)da; + goto err_map; } - /* - * In any case, flush the TLB - * This is called from here instead from pte_update to avoid unnecessary - * repetition while mapping non-contiguous physical regions of a virtual - * region - */ - flush_all(dev_context); - dev_dbg(bridge, "%s status %x\n", __func__, status); - return status; + return 0; + +err_map: + sg_free_table(sgt); +err_sg: + kfree(sgt); + return res; } /* @@ -1422,196 +1234,27 @@ func_cont: * So, instead of looking up the PTE address for every 4K block, * we clear consecutive PTEs until we unmap all the bytes */ -static int bridge_brd_mem_un_map(struct bridge_dev_context *hDevContext, - u32 ulVirtAddr, u32 ul_num_bytes) +static int bridge_brd_mem_un_map(struct bridge_dev_context *dev_ctx, + u32 da, u32 size) { - u32 l1_base_va; - u32 l2_base_va; - u32 l2_base_pa; - u32 l2_page_num; - u32 pte_val; - u32 pte_size; - u32 pte_count; - u32 pte_addr_l1; - u32 pte_addr_l2 = 0; - u32 rem_bytes; - u32 rem_bytes_l2; - u32 va_curr; - struct page *pg = NULL; - int status = 0; - struct bridge_dev_context *dev_context = hDevContext; - struct pg_table_attrs *pt = dev_context->pt_attrs; - u32 temp; - u32 paddr; - u32 numof4k_pages = 0; - - va_curr = ulVirtAddr; - rem_bytes = ul_num_bytes; - rem_bytes_l2 = 0; - l1_base_va = pt->l1_base_va; - pte_addr_l1 = hw_mmu_pte_addr_l1(l1_base_va, va_curr); - dev_dbg(bridge, "%s hDevContext %p, va %x, NumBytes %x l1_base_va %x, " - "pte_addr_l1 %x\n", __func__, hDevContext, ulVirtAddr, - ul_num_bytes, l1_base_va, pte_addr_l1); + unsigned i; + struct sg_table *sgt; + struct scatterlist *sg; - while (rem_bytes && (DSP_SUCCEEDED(status))) { - u32 va_curr_orig = va_curr; - /* Find whether the L1 PTE points to a valid L2 PT */ - pte_addr_l1 = hw_mmu_pte_addr_l1(l1_base_va, va_curr); - pte_val = *(u32 *) pte_addr_l1; - pte_size = hw_mmu_pte_size_l1(pte_val); - - if (pte_size != HW_MMU_COARSE_PAGE_SIZE) - goto skip_coarse_page; - - /* - * Get the L2 PA from the L1 PTE, and find - * corresponding L2 VA - */ - l2_base_pa = hw_mmu_pte_coarse_l1(pte_val); - l2_base_va = l2_base_pa - pt->l2_base_pa + pt->l2_base_va; - l2_page_num = - (l2_base_pa - pt->l2_base_pa) / HW_MMU_COARSE_PAGE_SIZE; - /* - * Find the L2 PTE address from which we will start - * clearing, the number of PTEs to be cleared on this - * page, and the size of VA space that needs to be - * cleared on this L2 page - */ - pte_addr_l2 = hw_mmu_pte_addr_l2(l2_base_va, va_curr); - pte_count = pte_addr_l2 & (HW_MMU_COARSE_PAGE_SIZE - 1); - pte_count = (HW_MMU_COARSE_PAGE_SIZE - pte_count) / sizeof(u32); - if (rem_bytes < (pte_count * PG_SIZE4K)) - pte_count = rem_bytes / PG_SIZE4K; - rem_bytes_l2 = pte_count * PG_SIZE4K; - - /* - * Unmap the VA space on this L2 PT. A quicker way - * would be to clear pte_count entries starting from - * pte_addr_l2. However, below code checks that we don't - * clear invalid entries or less than 64KB for a 64KB - * entry. Similar checking is done for L1 PTEs too - * below - */ - while (rem_bytes_l2 && (DSP_SUCCEEDED(status))) { - pte_val = *(u32 *) pte_addr_l2; - pte_size = hw_mmu_pte_size_l2(pte_val); - /* va_curr aligned to pte_size? */ - if (pte_size == 0 || rem_bytes_l2 < pte_size || - va_curr & (pte_size - 1)) { - status = -EPERM; - break; - } + if (!size) + return -EINVAL; - /* Collect Physical addresses from VA */ - paddr = (pte_val & ~(pte_size - 1)); - if (pte_size == HW_PAGE_SIZE64KB) - numof4k_pages = 16; - else - numof4k_pages = 1; - temp = 0; - while (temp++ < numof4k_pages) { - if (!pfn_valid(__phys_to_pfn(paddr))) { - paddr += HW_PAGE_SIZE4KB; - continue; - } - pg = PHYS_TO_PAGE(paddr); - if (page_count(pg) < 1) { - pr_info("DSPBRIDGE: UNMAP function: " - "COUNT 0 FOR PA 0x%x, size = " - "0x%x\n", paddr, ul_num_bytes); - bad_page_dump(paddr, pg); - } else { - SetPageDirty(pg); - page_cache_release(pg); - } - paddr += HW_PAGE_SIZE4KB; - } - if (hw_mmu_pte_clear(pte_addr_l2, va_curr, pte_size) - == RET_FAIL) { - status = -EPERM; - goto EXIT_LOOP; - } + sgt = iommu_vunmap(dev_ctx->dsp_mmu, da); + if (!sgt) + return -EFAULT; - status = 0; - rem_bytes_l2 -= pte_size; - va_curr += pte_size; - pte_addr_l2 += (pte_size >> 12) * sizeof(u32); - } - spin_lock(&pt->pg_lock); - if (rem_bytes_l2 == 0) { - pt->pg_info[l2_page_num].num_entries -= pte_count; - if (pt->pg_info[l2_page_num].num_entries == 0) { - /* - * Clear the L1 PTE pointing to the L2 PT - */ - if (hw_mmu_pte_clear(l1_base_va, va_curr_orig, - HW_MMU_COARSE_PAGE_SIZE) == - RET_OK) - status = 0; - else { - status = -EPERM; - spin_unlock(&pt->pg_lock); - goto EXIT_LOOP; - } - } - rem_bytes -= pte_count * PG_SIZE4K; - } else - status = -EPERM; + for_each_sg(sgt->sgl, sg, sgt->nents, i) + put_page(sg_page(sg)); - spin_unlock(&pt->pg_lock); - continue; -skip_coarse_page: - /* va_curr aligned to pte_size? */ - /* pte_size = 1 MB or 16 MB */ - if (pte_size == 0 || rem_bytes < pte_size || - va_curr & (pte_size - 1)) { - status = -EPERM; - break; - } + sg_free_table(sgt); + kfree(sgt); - if (pte_size == HW_PAGE_SIZE1MB) - numof4k_pages = 256; - else - numof4k_pages = 4096; - temp = 0; - /* Collect Physical addresses from VA */ - paddr = (pte_val & ~(pte_size - 1)); - while (temp++ < numof4k_pages) { - if (pfn_valid(__phys_to_pfn(paddr))) { - pg = PHYS_TO_PAGE(paddr); - if (page_count(pg) < 1) { - pr_info("DSPBRIDGE: UNMAP function: " - "COUNT 0 FOR PA 0x%x, size = " - "0x%x\n", paddr, ul_num_bytes); - bad_page_dump(paddr, pg); - } else { - SetPageDirty(pg); - page_cache_release(pg); - } - } - paddr += HW_PAGE_SIZE4KB; - } - if (hw_mmu_pte_clear(l1_base_va, va_curr, pte_size) == RET_OK) { - status = 0; - rem_bytes -= pte_size; - va_curr += pte_size; - } else { - status = -EPERM; - goto EXIT_LOOP; - } - } - /* - * It is better to flush the TLB here, so that any stale old entries - * get flushed - */ -EXIT_LOOP: - flush_all(dev_context); - dev_dbg(bridge, - "%s: va_curr %x, pte_addr_l1 %x pte_addr_l2 %x rem_bytes %x," - " rem_bytes_l2 %x status %x\n", __func__, va_curr, pte_addr_l1, - pte_addr_l2, rem_bytes, rem_bytes_l2, status); - return status; + return 0; } /* diff --git a/drivers/dsp/bridge/core/ue_deh.c b/drivers/dsp/bridge/core/ue_deh.c index 64e9366..ce13e6c 100644 --- a/drivers/dsp/bridge/core/ue_deh.c +++ b/drivers/dsp/bridge/core/ue_deh.c @@ -99,14 +99,6 @@ int bridge_deh_create(struct deh_mgr **ret_deh_mgr, deh_mgr->err_info.dw_val2 = 0L; deh_mgr->err_info.dw_val3 = 0L; - /* Install ISR function for DSP MMU fault */ - if ((request_irq(INT_DSP_MMU_IRQ, mmu_fault_isr, 0, - "DspBridge\tiommu fault", - (void *)deh_mgr)) == 0) - status = 0; - else - status = -EPERM; - err: if (DSP_FAILED(status)) { /* If create failed, cleanup */ @@ -131,8 +123,6 @@ int bridge_deh_destroy(struct deh_mgr *deh_mgr) ntfy_delete(deh_mgr->ntfy_obj); kfree(deh_mgr->ntfy_obj); } - /* Disable DSP MMU fault */ - free_irq(INT_DSP_MMU_IRQ, deh_mgr); /* Free DPC object */ tasklet_kill(&deh_mgr->dpc_tasklet); -- 1.6.3.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |