| /* |
| * cmm.c |
| * |
| * DSP-BIOS Bridge driver support functions for TI OMAP processors. |
| * |
| * The Communication(Shared) Memory Management(CMM) module provides |
| * shared memory management services for DSP/BIOS Bridge data streaming |
| * and messaging. |
| * |
| * Multiple shared memory segments can be registered with CMM. |
| * Each registered SM segment is represented by a SM "allocator" that |
| * describes a block of physically contiguous shared memory used for |
| * future allocations by CMM. |
| * |
| * Memory is coalesced back to the appropriate heap when a buffer is |
| * freed. |
| * |
| * Notes: |
| * Va: Virtual address. |
| * Pa: Physical or kernel system address. |
| * |
| * Copyright (C) 2005-2006 Texas Instruments, Inc. |
| * |
| * This package is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
| * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| */ |
| #include <linux/types.h> |
| #include <linux/list.h> |
| |
| /* ----------------------------------- DSP/BIOS Bridge */ |
| #include <dspbridge/dbdefs.h> |
| |
| /* ----------------------------------- OS Adaptation Layer */ |
| #include <dspbridge/sync.h> |
| |
| /* ----------------------------------- Platform Manager */ |
| #include <dspbridge/dev.h> |
| #include <dspbridge/proc.h> |
| |
| /* ----------------------------------- This */ |
| #include <dspbridge/cmm.h> |
| |
| /* ----------------------------------- Defines, Data Structures, Typedefs */ |
| #define NEXT_PA(pnode) (pnode->pa + pnode->size) |
| |
| /* Other bus/platform translations */ |
| #define DSPPA2GPPPA(base, x, y) ((x)+(y)) |
| #define GPPPA2DSPPA(base, x, y) ((x)-(y)) |
| |
| /* |
| * Allocators define a block of contiguous memory used for future allocations. |
| * |
| * sma - shared memory allocator. |
| * vma - virtual memory allocator.(not used). |
| */ |
| struct cmm_allocator { /* sma */ |
| unsigned int shm_base; /* Start of physical SM block */ |
| u32 sm_size; /* Size of SM block in bytes */ |
| unsigned int vm_base; /* Start of VM block. (Dev driver |
| * context for 'sma') */ |
| u32 dsp_phys_addr_offset; /* DSP PA to GPP PA offset for this |
| * SM space */ |
| s8 c_factor; /* DSPPa to GPPPa Conversion Factor */ |
| unsigned int dsp_base; /* DSP virt base byte address */ |
| u32 dsp_size; /* DSP seg size in bytes */ |
| struct cmm_object *cmm_mgr; /* back ref to parent mgr */ |
| /* node list of available memory */ |
| struct list_head free_list; |
| /* node list of memory in use */ |
| struct list_head in_use_list; |
| }; |
| |
| struct cmm_xlator { /* Pa<->Va translator object */ |
| /* CMM object this translator associated */ |
| struct cmm_object *cmm_mgr; |
| /* |
| * Client process virtual base address that corresponds to phys SM |
| * base address for translator's seg_id. |
| * Only 1 segment ID currently supported. |
| */ |
| unsigned int virt_base; /* virtual base address */ |
| u32 virt_size; /* size of virt space in bytes */ |
| u32 seg_id; /* Segment Id */ |
| }; |
| |
| /* CMM Mgr */ |
| struct cmm_object { |
| /* |
| * Cmm Lock is used to serialize access mem manager for multi-threads. |
| */ |
| struct mutex cmm_lock; /* Lock to access cmm mgr */ |
| struct list_head node_free_list; /* Free list of memory nodes */ |
| u32 min_block_size; /* Min SM block; default 16 bytes */ |
| u32 page_size; /* Memory Page size (1k/4k) */ |
| /* GPP SM segment ptrs */ |
| struct cmm_allocator *pa_gppsm_seg_tab[CMM_MAXGPPSEGS]; |
| }; |
| |
| /* Default CMM Mgr attributes */ |
| static struct cmm_mgrattrs cmm_dfltmgrattrs = { |
| /* min_block_size, min block size(bytes) allocated by cmm mgr */ |
| 16 |
| }; |
| |
| /* Default allocation attributes */ |
| static struct cmm_attrs cmm_dfltalctattrs = { |
| 1 /* seg_id, default segment Id for allocator */ |
| }; |
| |
| /* Address translator default attrs */ |
| static struct cmm_xlatorattrs cmm_dfltxlatorattrs = { |
| /* seg_id, does not have to match cmm_dfltalctattrs ul_seg_id */ |
| 1, |
| 0, /* dsp_bufs */ |
| 0, /* dsp_buf_size */ |
| NULL, /* vm_base */ |
| 0, /* vm_size */ |
| }; |
| |
| /* SM node representing a block of memory. */ |
| struct cmm_mnode { |
| struct list_head link; /* must be 1st element */ |
| u32 pa; /* Phys addr */ |
| u32 va; /* Virtual address in device process context */ |
| u32 size; /* SM block size in bytes */ |
| u32 client_proc; /* Process that allocated this mem block */ |
| }; |
| |
| /* ----------------------------------- Globals */ |
| static u32 refs; /* module reference count */ |
| |
| /* ----------------------------------- Function Prototypes */ |
| static void add_to_free_list(struct cmm_allocator *allocator, |
| struct cmm_mnode *pnode); |
| static struct cmm_allocator *get_allocator(struct cmm_object *cmm_mgr_obj, |
| u32 ul_seg_id); |
| static struct cmm_mnode *get_free_block(struct cmm_allocator *allocator, |
| u32 usize); |
| static struct cmm_mnode *get_node(struct cmm_object *cmm_mgr_obj, u32 dw_pa, |
| u32 dw_va, u32 ul_size); |
| /* get available slot for new allocator */ |
| static s32 get_slot(struct cmm_object *cmm_mgr_obj); |
| static void un_register_gppsm_seg(struct cmm_allocator *psma); |
| |
| /* |
| * ======== cmm_calloc_buf ======== |
| * Purpose: |
| * Allocate a SM buffer, zero contents, and return the physical address |
| * and optional driver context virtual address(pp_buf_va). |
| * |
| * The freelist is sorted in increasing size order. Get the first |
| * block that satifies the request and sort the remaining back on |
| * the freelist; if large enough. The kept block is placed on the |
| * inUseList. |
| */ |
| void *cmm_calloc_buf(struct cmm_object *hcmm_mgr, u32 usize, |
| struct cmm_attrs *pattrs, void **pp_buf_va) |
| { |
| struct cmm_object *cmm_mgr_obj = (struct cmm_object *)hcmm_mgr; |
| void *buf_pa = NULL; |
| struct cmm_mnode *pnode = NULL; |
| struct cmm_mnode *new_node = NULL; |
| struct cmm_allocator *allocator = NULL; |
| u32 delta_size; |
| u8 *pbyte = NULL; |
| s32 cnt; |
| |
| if (pattrs == NULL) |
| pattrs = &cmm_dfltalctattrs; |
| |
| if (pp_buf_va != NULL) |
| *pp_buf_va = NULL; |
| |
| if (cmm_mgr_obj && (usize != 0)) { |
| if (pattrs->seg_id > 0) { |
| /* SegId > 0 is SM */ |
| /* get the allocator object for this segment id */ |
| allocator = |
| get_allocator(cmm_mgr_obj, pattrs->seg_id); |
| /* keep block size a multiple of min_block_size */ |
| usize = |
| ((usize - 1) & ~(cmm_mgr_obj->min_block_size - |
| 1)) |
| + cmm_mgr_obj->min_block_size; |
| mutex_lock(&cmm_mgr_obj->cmm_lock); |
| pnode = get_free_block(allocator, usize); |
| } |
| if (pnode) { |
| delta_size = (pnode->size - usize); |
| if (delta_size >= cmm_mgr_obj->min_block_size) { |
| /* create a new block with the leftovers and |
| * add to freelist */ |
| new_node = |
| get_node(cmm_mgr_obj, pnode->pa + usize, |
| pnode->va + usize, |
| (u32) delta_size); |
| /* leftovers go free */ |
| add_to_free_list(allocator, new_node); |
| /* adjust our node's size */ |
| pnode->size = usize; |
| } |
| /* Tag node with client process requesting allocation |
| * We'll need to free up a process's alloc'd SM if the |
| * client process goes away. |
| */ |
| /* Return TGID instead of process handle */ |
| pnode->client_proc = current->tgid; |
| |
| /* put our node on InUse list */ |
| list_add_tail(&pnode->link, &allocator->in_use_list); |
| buf_pa = (void *)pnode->pa; /* physical address */ |
| /* clear mem */ |
| pbyte = (u8 *) pnode->va; |
| for (cnt = 0; cnt < (s32) usize; cnt++, pbyte++) |
| *pbyte = 0; |
| |
| if (pp_buf_va != NULL) { |
| /* Virtual address */ |
| *pp_buf_va = (void *)pnode->va; |
| } |
| } |
| mutex_unlock(&cmm_mgr_obj->cmm_lock); |
| } |
| return buf_pa; |
| } |
| |
| /* |
| * ======== cmm_create ======== |
| * Purpose: |
| * Create a communication memory manager object. |
| */ |
| int cmm_create(struct cmm_object **ph_cmm_mgr, |
| struct dev_object *hdev_obj, |
| const struct cmm_mgrattrs *mgr_attrts) |
| { |
| struct cmm_object *cmm_obj = NULL; |
| int status = 0; |
| |
| *ph_cmm_mgr = NULL; |
| /* create, zero, and tag a cmm mgr object */ |
| cmm_obj = kzalloc(sizeof(struct cmm_object), GFP_KERNEL); |
| if (!cmm_obj) |
| return -ENOMEM; |
| |
| if (mgr_attrts == NULL) |
| mgr_attrts = &cmm_dfltmgrattrs; /* set defaults */ |
| |
| /* save away smallest block allocation for this cmm mgr */ |
| cmm_obj->min_block_size = mgr_attrts->min_block_size; |
| cmm_obj->page_size = PAGE_SIZE; |
| |
| /* create node free list */ |
| INIT_LIST_HEAD(&cmm_obj->node_free_list); |
| mutex_init(&cmm_obj->cmm_lock); |
| *ph_cmm_mgr = cmm_obj; |
| |
| return status; |
| } |
| |
| /* |
| * ======== cmm_destroy ======== |
| * Purpose: |
| * Release the communication memory manager resources. |
| */ |
| int cmm_destroy(struct cmm_object *hcmm_mgr, bool force) |
| { |
| struct cmm_object *cmm_mgr_obj = (struct cmm_object *)hcmm_mgr; |
| struct cmm_info temp_info; |
| int status = 0; |
| s32 slot_seg; |
| struct cmm_mnode *node, *tmp; |
| |
| if (!hcmm_mgr) { |
| status = -EFAULT; |
| return status; |
| } |
| mutex_lock(&cmm_mgr_obj->cmm_lock); |
| /* If not force then fail if outstanding allocations exist */ |
| if (!force) { |
| /* Check for outstanding memory allocations */ |
| status = cmm_get_info(hcmm_mgr, &temp_info); |
| if (!status) { |
| if (temp_info.total_in_use_cnt > 0) { |
| /* outstanding allocations */ |
| status = -EPERM; |
| } |
| } |
| } |
| if (!status) { |
| /* UnRegister SM allocator */ |
| for (slot_seg = 0; slot_seg < CMM_MAXGPPSEGS; slot_seg++) { |
| if (cmm_mgr_obj->pa_gppsm_seg_tab[slot_seg] != NULL) { |
| un_register_gppsm_seg |
| (cmm_mgr_obj->pa_gppsm_seg_tab[slot_seg]); |
| /* Set slot to NULL for future reuse */ |
| cmm_mgr_obj->pa_gppsm_seg_tab[slot_seg] = NULL; |
| } |
| } |
| } |
| list_for_each_entry_safe(node, tmp, &cmm_mgr_obj->node_free_list, |
| link) { |
| list_del(&node->link); |
| kfree(node); |
| } |
| mutex_unlock(&cmm_mgr_obj->cmm_lock); |
| if (!status) { |
| /* delete CS & cmm mgr object */ |
| mutex_destroy(&cmm_mgr_obj->cmm_lock); |
| kfree(cmm_mgr_obj); |
| } |
| return status; |
| } |
| |
| /* |
| * ======== cmm_exit ======== |
| * Purpose: |
| * Discontinue usage of module; free resources when reference count |
| * reaches 0. |
| */ |
| void cmm_exit(void) |
| { |
| refs--; |
| } |
| |
| /* |
| * ======== cmm_free_buf ======== |
| * Purpose: |
| * Free the given buffer. |
| */ |
| int cmm_free_buf(struct cmm_object *hcmm_mgr, void *buf_pa, u32 ul_seg_id) |
| { |
| struct cmm_object *cmm_mgr_obj = (struct cmm_object *)hcmm_mgr; |
| int status = -EFAULT; |
| struct cmm_mnode *curr, *tmp; |
| struct cmm_allocator *allocator; |
| struct cmm_attrs *pattrs; |
| |
| if (ul_seg_id == 0) { |
| pattrs = &cmm_dfltalctattrs; |
| ul_seg_id = pattrs->seg_id; |
| } |
| if (!hcmm_mgr || !(ul_seg_id > 0)) { |
| status = -EFAULT; |
| return status; |
| } |
| |
| allocator = get_allocator(cmm_mgr_obj, ul_seg_id); |
| if (!allocator) |
| return status; |
| |
| mutex_lock(&cmm_mgr_obj->cmm_lock); |
| list_for_each_entry_safe(curr, tmp, &allocator->in_use_list, link) { |
| if (curr->pa == (u32) buf_pa) { |
| list_del(&curr->link); |
| add_to_free_list(allocator, curr); |
| status = 0; |
| break; |
| } |
| } |
| mutex_unlock(&cmm_mgr_obj->cmm_lock); |
| |
| return status; |
| } |
| |
| /* |
| * ======== cmm_get_handle ======== |
| * Purpose: |
| * Return the communication memory manager object for this device. |
| * This is typically called from the client process. |
| */ |
| int cmm_get_handle(void *hprocessor, struct cmm_object ** ph_cmm_mgr) |
| { |
| int status = 0; |
| struct dev_object *hdev_obj; |
| |
| if (hprocessor != NULL) |
| status = proc_get_dev_object(hprocessor, &hdev_obj); |
| else |
| hdev_obj = dev_get_first(); /* default */ |
| |
| if (!status) |
| status = dev_get_cmm_mgr(hdev_obj, ph_cmm_mgr); |
| |
| return status; |
| } |
| |
| /* |
| * ======== cmm_get_info ======== |
| * Purpose: |
| * Return the current memory utilization information. |
| */ |
| int cmm_get_info(struct cmm_object *hcmm_mgr, |
| struct cmm_info *cmm_info_obj) |
| { |
| struct cmm_object *cmm_mgr_obj = (struct cmm_object *)hcmm_mgr; |
| u32 ul_seg; |
| int status = 0; |
| struct cmm_allocator *altr; |
| struct cmm_mnode *curr; |
| |
| if (!hcmm_mgr) { |
| status = -EFAULT; |
| return status; |
| } |
| mutex_lock(&cmm_mgr_obj->cmm_lock); |
| cmm_info_obj->num_gppsm_segs = 0; /* # of SM segments */ |
| /* Total # of outstanding alloc */ |
| cmm_info_obj->total_in_use_cnt = 0; |
| /* min block size */ |
| cmm_info_obj->min_block_size = cmm_mgr_obj->min_block_size; |
| /* check SM memory segments */ |
| for (ul_seg = 1; ul_seg <= CMM_MAXGPPSEGS; ul_seg++) { |
| /* get the allocator object for this segment id */ |
| altr = get_allocator(cmm_mgr_obj, ul_seg); |
| if (!altr) |
| continue; |
| cmm_info_obj->num_gppsm_segs++; |
| cmm_info_obj->seg_info[ul_seg - 1].seg_base_pa = |
| altr->shm_base - altr->dsp_size; |
| cmm_info_obj->seg_info[ul_seg - 1].total_seg_size = |
| altr->dsp_size + altr->sm_size; |
| cmm_info_obj->seg_info[ul_seg - 1].gpp_base_pa = |
| altr->shm_base; |
| cmm_info_obj->seg_info[ul_seg - 1].gpp_size = |
| altr->sm_size; |
| cmm_info_obj->seg_info[ul_seg - 1].dsp_base_va = |
| altr->dsp_base; |
| cmm_info_obj->seg_info[ul_seg - 1].dsp_size = |
| altr->dsp_size; |
| cmm_info_obj->seg_info[ul_seg - 1].seg_base_va = |
| altr->vm_base - altr->dsp_size; |
| cmm_info_obj->seg_info[ul_seg - 1].in_use_cnt = 0; |
| |
| list_for_each_entry(curr, &altr->in_use_list, link) { |
| cmm_info_obj->total_in_use_cnt++; |
| cmm_info_obj->seg_info[ul_seg - 1].in_use_cnt++; |
| } |
| } |
| mutex_unlock(&cmm_mgr_obj->cmm_lock); |
| return status; |
| } |
| |
| /* |
| * ======== cmm_init ======== |
| * Purpose: |
| * Initializes private state of CMM module. |
| */ |
| bool cmm_init(void) |
| { |
| bool ret = true; |
| |
| if (ret) |
| refs++; |
| |
| return ret; |
| } |
| |
| /* |
| * ======== cmm_register_gppsm_seg ======== |
| * Purpose: |
| * Register a block of SM with the CMM to be used for later GPP SM |
| * allocations. |
| */ |
| int cmm_register_gppsm_seg(struct cmm_object *hcmm_mgr, |
| u32 dw_gpp_base_pa, u32 ul_size, |
| u32 dsp_addr_offset, s8 c_factor, |
| u32 dw_dsp_base, u32 ul_dsp_size, |
| u32 *sgmt_id, u32 gpp_base_va) |
| { |
| struct cmm_object *cmm_mgr_obj = (struct cmm_object *)hcmm_mgr; |
| struct cmm_allocator *psma = NULL; |
| int status = 0; |
| struct cmm_mnode *new_node; |
| s32 slot_seg; |
| |
| dev_dbg(bridge, "%s: dw_gpp_base_pa %x ul_size %x dsp_addr_offset %x " |
| "dw_dsp_base %x ul_dsp_size %x gpp_base_va %x\n", |
| __func__, dw_gpp_base_pa, ul_size, dsp_addr_offset, |
| dw_dsp_base, ul_dsp_size, gpp_base_va); |
| |
| if (!hcmm_mgr) |
| return -EFAULT; |
| |
| /* make sure we have room for another allocator */ |
| mutex_lock(&cmm_mgr_obj->cmm_lock); |
| |
| slot_seg = get_slot(cmm_mgr_obj); |
| if (slot_seg < 0) { |
| status = -EPERM; |
| goto func_end; |
| } |
| |
| /* Check if input ul_size is big enough to alloc at least one block */ |
| if (ul_size < cmm_mgr_obj->min_block_size) { |
| status = -EINVAL; |
| goto func_end; |
| } |
| |
| /* create, zero, and tag an SM allocator object */ |
| psma = kzalloc(sizeof(struct cmm_allocator), GFP_KERNEL); |
| if (!psma) { |
| status = -ENOMEM; |
| goto func_end; |
| } |
| |
| psma->cmm_mgr = hcmm_mgr; /* ref to parent */ |
| psma->shm_base = dw_gpp_base_pa; /* SM Base phys */ |
| psma->sm_size = ul_size; /* SM segment size in bytes */ |
| psma->vm_base = gpp_base_va; |
| psma->dsp_phys_addr_offset = dsp_addr_offset; |
| psma->c_factor = c_factor; |
| psma->dsp_base = dw_dsp_base; |
| psma->dsp_size = ul_dsp_size; |
| if (psma->vm_base == 0) { |
| status = -EPERM; |
| goto func_end; |
| } |
| /* return the actual segment identifier */ |
| *sgmt_id = (u32) slot_seg + 1; |
| |
| INIT_LIST_HEAD(&psma->free_list); |
| INIT_LIST_HEAD(&psma->in_use_list); |
| |
| /* Get a mem node for this hunk-o-memory */ |
| new_node = get_node(cmm_mgr_obj, dw_gpp_base_pa, |
| psma->vm_base, ul_size); |
| /* Place node on the SM allocator's free list */ |
| if (new_node) { |
| list_add_tail(&new_node->link, &psma->free_list); |
| } else { |
| status = -ENOMEM; |
| goto func_end; |
| } |
| /* make entry */ |
| cmm_mgr_obj->pa_gppsm_seg_tab[slot_seg] = psma; |
| |
| func_end: |
| /* Cleanup allocator */ |
| if (status && psma) |
| un_register_gppsm_seg(psma); |
| mutex_unlock(&cmm_mgr_obj->cmm_lock); |
| |
| return status; |
| } |
| |
| /* |
| * ======== cmm_un_register_gppsm_seg ======== |
| * Purpose: |
| * UnRegister GPP SM segments with the CMM. |
| */ |
| int cmm_un_register_gppsm_seg(struct cmm_object *hcmm_mgr, |
| u32 ul_seg_id) |
| { |
| struct cmm_object *cmm_mgr_obj = (struct cmm_object *)hcmm_mgr; |
| int status = 0; |
| struct cmm_allocator *psma; |
| u32 ul_id = ul_seg_id; |
| |
| if (!hcmm_mgr) |
| return -EFAULT; |
| |
| if (ul_seg_id == CMM_ALLSEGMENTS) |
| ul_id = 1; |
| |
| if ((ul_id <= 0) || (ul_id > CMM_MAXGPPSEGS)) |
| return -EINVAL; |
| |
| /* |
| * FIXME: CMM_MAXGPPSEGS == 1. why use a while cycle? Seems to me like |
| * the ul_seg_id is not needed here. It must be always 1. |
| */ |
| while (ul_id <= CMM_MAXGPPSEGS) { |
| mutex_lock(&cmm_mgr_obj->cmm_lock); |
| /* slot = seg_id-1 */ |
| psma = cmm_mgr_obj->pa_gppsm_seg_tab[ul_id - 1]; |
| if (psma != NULL) { |
| un_register_gppsm_seg(psma); |
| /* Set alctr ptr to NULL for future reuse */ |
| cmm_mgr_obj->pa_gppsm_seg_tab[ul_id - 1] = NULL; |
| } else if (ul_seg_id != CMM_ALLSEGMENTS) { |
| status = -EPERM; |
| } |
| mutex_unlock(&cmm_mgr_obj->cmm_lock); |
| if (ul_seg_id != CMM_ALLSEGMENTS) |
| break; |
| |
| ul_id++; |
| } /* end while */ |
| return status; |
| } |
| |
| /* |
| * ======== un_register_gppsm_seg ======== |
| * Purpose: |
| * UnRegister the SM allocator by freeing all its resources and |
| * nulling cmm mgr table entry. |
| * Note: |
| * This routine is always called within cmm lock crit sect. |
| */ |
| static void un_register_gppsm_seg(struct cmm_allocator *psma) |
| { |
| struct cmm_mnode *curr, *tmp; |
| |
| /* free nodes on free list */ |
| list_for_each_entry_safe(curr, tmp, &psma->free_list, link) { |
| list_del(&curr->link); |
| kfree(curr); |
| } |
| |
| /* free nodes on InUse list */ |
| list_for_each_entry_safe(curr, tmp, &psma->in_use_list, link) { |
| list_del(&curr->link); |
| kfree(curr); |
| } |
| |
| if ((void *)psma->vm_base != NULL) |
| MEM_UNMAP_LINEAR_ADDRESS((void *)psma->vm_base); |
| |
| /* Free allocator itself */ |
| kfree(psma); |
| } |
| |
| /* |
| * ======== get_slot ======== |
| * Purpose: |
| * An available slot # is returned. Returns negative on failure. |
| */ |
| static s32 get_slot(struct cmm_object *cmm_mgr_obj) |
| { |
| s32 slot_seg = -1; /* neg on failure */ |
| /* get first available slot in cmm mgr SMSegTab[] */ |
| for (slot_seg = 0; slot_seg < CMM_MAXGPPSEGS; slot_seg++) { |
| if (cmm_mgr_obj->pa_gppsm_seg_tab[slot_seg] == NULL) |
| break; |
| |
| } |
| if (slot_seg == CMM_MAXGPPSEGS) |
| slot_seg = -1; /* failed */ |
| |
| return slot_seg; |
| } |
| |
| /* |
| * ======== get_node ======== |
| * Purpose: |
| * Get a memory node from freelist or create a new one. |
| */ |
| static struct cmm_mnode *get_node(struct cmm_object *cmm_mgr_obj, u32 dw_pa, |
| u32 dw_va, u32 ul_size) |
| { |
| struct cmm_mnode *pnode; |
| |
| /* Check cmm mgr's node freelist */ |
| if (list_empty(&cmm_mgr_obj->node_free_list)) { |
| pnode = kzalloc(sizeof(struct cmm_mnode), GFP_KERNEL); |
| if (!pnode) |
| return NULL; |
| } else { |
| /* surely a valid element */ |
| pnode = list_first_entry(&cmm_mgr_obj->node_free_list, |
| struct cmm_mnode, link); |
| list_del_init(&pnode->link); |
| } |
| |
| pnode->pa = dw_pa; |
| pnode->va = dw_va; |
| pnode->size = ul_size; |
| |
| return pnode; |
| } |
| |
| /* |
| * ======== delete_node ======== |
| * Purpose: |
| * Put a memory node on the cmm nodelist for later use. |
| * Doesn't actually delete the node. Heap thrashing friendly. |
| */ |
| static void delete_node(struct cmm_object *cmm_mgr_obj, struct cmm_mnode *pnode) |
| { |
| list_add_tail(&pnode->link, &cmm_mgr_obj->node_free_list); |
| } |
| |
| /* |
| * ====== get_free_block ======== |
| * Purpose: |
| * Scan the free block list and return the first block that satisfies |
| * the size. |
| */ |
| static struct cmm_mnode *get_free_block(struct cmm_allocator *allocator, |
| u32 usize) |
| { |
| struct cmm_mnode *node, *tmp; |
| |
| if (!allocator) |
| return NULL; |
| |
| list_for_each_entry_safe(node, tmp, &allocator->free_list, link) { |
| if (usize <= node->size) { |
| list_del(&node->link); |
| return node; |
| } |
| } |
| |
| return NULL; |
| } |
| |
| /* |
| * ======== add_to_free_list ======== |
| * Purpose: |
| * Coalesce node into the freelist in ascending size order. |
| */ |
| static void add_to_free_list(struct cmm_allocator *allocator, |
| struct cmm_mnode *node) |
| { |
| struct cmm_mnode *curr; |
| |
| if (!node) { |
| pr_err("%s: failed - node is NULL\n", __func__); |
| return; |
| } |
| |
| list_for_each_entry(curr, &allocator->free_list, link) { |
| if (NEXT_PA(curr) == node->pa) { |
| curr->size += node->size; |
| delete_node(allocator->cmm_mgr, node); |
| return; |
| } |
| if (curr->pa == NEXT_PA(node)) { |
| curr->pa = node->pa; |
| curr->va = node->va; |
| curr->size += node->size; |
| delete_node(allocator->cmm_mgr, node); |
| return; |
| } |
| } |
| list_for_each_entry(curr, &allocator->free_list, link) { |
| if (curr->size >= node->size) { |
| list_add_tail(&node->link, &curr->link); |
| return; |
| } |
| } |
| list_add_tail(&node->link, &allocator->free_list); |
| } |
| |
| /* |
| * ======== get_allocator ======== |
| * Purpose: |
| * Return the allocator for the given SM Segid. |
| * SegIds: 1,2,3..max. |
| */ |
| static struct cmm_allocator *get_allocator(struct cmm_object *cmm_mgr_obj, |
| u32 ul_seg_id) |
| { |
| return cmm_mgr_obj->pa_gppsm_seg_tab[ul_seg_id - 1]; |
| } |
| |
| /* |
| * The CMM_Xlator[xxx] routines below are used by Node and Stream |
| * to perform SM address translation to the client process address space. |
| * A "translator" object is created by a node/stream for each SM seg used. |
| */ |
| |
| /* |
| * ======== cmm_xlator_create ======== |
| * Purpose: |
| * Create an address translator object. |
| */ |
| int cmm_xlator_create(struct cmm_xlatorobject **xlator, |
| struct cmm_object *hcmm_mgr, |
| struct cmm_xlatorattrs *xlator_attrs) |
| { |
| struct cmm_xlator *xlator_object = NULL; |
| int status = 0; |
| |
| *xlator = NULL; |
| if (xlator_attrs == NULL) |
| xlator_attrs = &cmm_dfltxlatorattrs; /* set defaults */ |
| |
| xlator_object = kzalloc(sizeof(struct cmm_xlator), GFP_KERNEL); |
| if (xlator_object != NULL) { |
| xlator_object->cmm_mgr = hcmm_mgr; /* ref back to CMM */ |
| /* SM seg_id */ |
| xlator_object->seg_id = xlator_attrs->seg_id; |
| } else { |
| status = -ENOMEM; |
| } |
| if (!status) |
| *xlator = (struct cmm_xlatorobject *)xlator_object; |
| |
| return status; |
| } |
| |
| /* |
| * ======== cmm_xlator_alloc_buf ======== |
| */ |
| void *cmm_xlator_alloc_buf(struct cmm_xlatorobject *xlator, void *va_buf, |
| u32 pa_size) |
| { |
| struct cmm_xlator *xlator_obj = (struct cmm_xlator *)xlator; |
| void *pbuf = NULL; |
| void *tmp_va_buff; |
| struct cmm_attrs attrs; |
| |
| if (xlator_obj) { |
| attrs.seg_id = xlator_obj->seg_id; |
| __raw_writel(0, va_buf); |
| /* Alloc SM */ |
| pbuf = |
| cmm_calloc_buf(xlator_obj->cmm_mgr, pa_size, &attrs, NULL); |
| if (pbuf) { |
| /* convert to translator(node/strm) process Virtual |
| * address */ |
| tmp_va_buff = cmm_xlator_translate(xlator, |
| pbuf, CMM_PA2VA); |
| __raw_writel((u32)tmp_va_buff, va_buf); |
| } |
| } |
| return pbuf; |
| } |
| |
| /* |
| * ======== cmm_xlator_free_buf ======== |
| * Purpose: |
| * Free the given SM buffer and descriptor. |
| * Does not free virtual memory. |
| */ |
| int cmm_xlator_free_buf(struct cmm_xlatorobject *xlator, void *buf_va) |
| { |
| struct cmm_xlator *xlator_obj = (struct cmm_xlator *)xlator; |
| int status = -EPERM; |
| void *buf_pa = NULL; |
| |
| if (xlator_obj) { |
| /* convert Va to Pa so we can free it. */ |
| buf_pa = cmm_xlator_translate(xlator, buf_va, CMM_VA2PA); |
| if (buf_pa) { |
| status = cmm_free_buf(xlator_obj->cmm_mgr, buf_pa, |
| xlator_obj->seg_id); |
| if (status) { |
| /* Uh oh, this shouldn't happen. Descriptor |
| * gone! */ |
| pr_err("%s, line %d: Assertion failed\n", |
| __FILE__, __LINE__); |
| } |
| } |
| } |
| return status; |
| } |
| |
| /* |
| * ======== cmm_xlator_info ======== |
| * Purpose: |
| * Set/Get translator info. |
| */ |
| int cmm_xlator_info(struct cmm_xlatorobject *xlator, u8 ** paddr, |
| u32 ul_size, u32 segm_id, bool set_info) |
| { |
| struct cmm_xlator *xlator_obj = (struct cmm_xlator *)xlator; |
| int status = 0; |
| |
| if (xlator_obj) { |
| if (set_info) { |
| /* set translators virtual address range */ |
| xlator_obj->virt_base = (u32) *paddr; |
| xlator_obj->virt_size = ul_size; |
| } else { /* return virt base address */ |
| *paddr = (u8 *) xlator_obj->virt_base; |
| } |
| } else { |
| status = -EFAULT; |
| } |
| return status; |
| } |
| |
| /* |
| * ======== cmm_xlator_translate ======== |
| */ |
| void *cmm_xlator_translate(struct cmm_xlatorobject *xlator, void *paddr, |
| enum cmm_xlatetype xtype) |
| { |
| u32 dw_addr_xlate = 0; |
| struct cmm_xlator *xlator_obj = (struct cmm_xlator *)xlator; |
| struct cmm_object *cmm_mgr_obj = NULL; |
| struct cmm_allocator *allocator = NULL; |
| u32 dw_offset = 0; |
| |
| if (!xlator_obj) |
| goto loop_cont; |
| |
| cmm_mgr_obj = (struct cmm_object *)xlator_obj->cmm_mgr; |
| /* get this translator's default SM allocator */ |
| allocator = cmm_mgr_obj->pa_gppsm_seg_tab[xlator_obj->seg_id - 1]; |
| if (!allocator) |
| goto loop_cont; |
| |
| if ((xtype == CMM_VA2DSPPA) || (xtype == CMM_VA2PA) || |
| (xtype == CMM_PA2VA)) { |
| if (xtype == CMM_PA2VA) { |
| /* Gpp Va = Va Base + offset */ |
| dw_offset = (u8 *) paddr - (u8 *) (allocator->shm_base - |
| allocator-> |
| dsp_size); |
| dw_addr_xlate = xlator_obj->virt_base + dw_offset; |
| /* Check if translated Va base is in range */ |
| if ((dw_addr_xlate < xlator_obj->virt_base) || |
| (dw_addr_xlate >= |
| (xlator_obj->virt_base + |
| xlator_obj->virt_size))) { |
| dw_addr_xlate = 0; /* bad address */ |
| } |
| } else { |
| /* Gpp PA = Gpp Base + offset */ |
| dw_offset = |
| (u8 *) paddr - (u8 *) xlator_obj->virt_base; |
| dw_addr_xlate = |
| allocator->shm_base - allocator->dsp_size + |
| dw_offset; |
| } |
| } else { |
| dw_addr_xlate = (u32) paddr; |
| } |
| /*Now convert address to proper target physical address if needed */ |
| if ((xtype == CMM_VA2DSPPA) || (xtype == CMM_PA2DSPPA)) { |
| /* Got Gpp Pa now, convert to DSP Pa */ |
| dw_addr_xlate = |
| GPPPA2DSPPA((allocator->shm_base - allocator->dsp_size), |
| dw_addr_xlate, |
| allocator->dsp_phys_addr_offset * |
| allocator->c_factor); |
| } else if (xtype == CMM_DSPPA2PA) { |
| /* Got DSP Pa, convert to GPP Pa */ |
| dw_addr_xlate = |
| DSPPA2GPPPA(allocator->shm_base - allocator->dsp_size, |
| dw_addr_xlate, |
| allocator->dsp_phys_addr_offset * |
| allocator->c_factor); |
| } |
| loop_cont: |
| return (void *)dw_addr_xlate; |
| } |