| /* |
| * |
| * Linux MegaRAID device driver |
| * |
| * Copyright (c) 2003-2004 LSI Logic Corporation. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| * |
| * FILE : megaraid_mm.c |
| * Version : v2.20.2.7 (Jul 16 2006) |
| * |
| * Common management module |
| */ |
| |
| #include "megaraid_mm.h" |
| |
| |
| // Entry points for char node driver |
| static int mraid_mm_open(struct inode *, struct file *); |
| static int mraid_mm_ioctl(struct inode *, struct file *, uint, unsigned long); |
| |
| |
| // routines to convert to and from the old the format |
| static int mimd_to_kioc(mimd_t __user *, mraid_mmadp_t *, uioc_t *); |
| static int kioc_to_mimd(uioc_t *, mimd_t __user *); |
| |
| |
| // Helper functions |
| static int handle_drvrcmd(void __user *, uint8_t, int *); |
| static int lld_ioctl(mraid_mmadp_t *, uioc_t *); |
| static void ioctl_done(uioc_t *); |
| static void lld_timedout(unsigned long); |
| static void hinfo_to_cinfo(mraid_hba_info_t *, mcontroller_t *); |
| static mraid_mmadp_t *mraid_mm_get_adapter(mimd_t __user *, int *); |
| static uioc_t *mraid_mm_alloc_kioc(mraid_mmadp_t *); |
| static void mraid_mm_dealloc_kioc(mraid_mmadp_t *, uioc_t *); |
| static int mraid_mm_attach_buf(mraid_mmadp_t *, uioc_t *, int); |
| static int mraid_mm_setup_dma_pools(mraid_mmadp_t *); |
| static void mraid_mm_free_adp_resources(mraid_mmadp_t *); |
| static void mraid_mm_teardown_dma_pools(mraid_mmadp_t *); |
| |
| #ifdef CONFIG_COMPAT |
| static long mraid_mm_compat_ioctl(struct file *, unsigned int, unsigned long); |
| #endif |
| |
| MODULE_AUTHOR("LSI Logic Corporation"); |
| MODULE_DESCRIPTION("LSI Logic Management Module"); |
| MODULE_LICENSE("GPL"); |
| MODULE_VERSION(LSI_COMMON_MOD_VERSION); |
| |
| static int dbglevel = CL_ANN; |
| module_param_named(dlevel, dbglevel, int, 0); |
| MODULE_PARM_DESC(dlevel, "Debug level (default=0)"); |
| |
| EXPORT_SYMBOL(mraid_mm_register_adp); |
| EXPORT_SYMBOL(mraid_mm_unregister_adp); |
| EXPORT_SYMBOL(mraid_mm_adapter_app_handle); |
| |
| static int majorno; |
| static uint32_t drvr_ver = 0x02200206; |
| |
| static int adapters_count_g; |
| static struct list_head adapters_list_g; |
| |
| static wait_queue_head_t wait_q; |
| |
| static struct file_operations lsi_fops = { |
| .open = mraid_mm_open, |
| .ioctl = mraid_mm_ioctl, |
| #ifdef CONFIG_COMPAT |
| .compat_ioctl = mraid_mm_compat_ioctl, |
| #endif |
| .owner = THIS_MODULE, |
| }; |
| |
| /** |
| * mraid_mm_open - open routine for char node interface |
| * @inode : unused |
| * @filep : unused |
| * |
| * Allow ioctl operations by apps only if they have superuser privilege. |
| */ |
| static int |
| mraid_mm_open(struct inode *inode, struct file *filep) |
| { |
| /* |
| * Only allow superuser to access private ioctl interface |
| */ |
| if (!capable(CAP_SYS_ADMIN)) return (-EACCES); |
| |
| return 0; |
| } |
| |
| /** |
| * mraid_mm_ioctl - module entry-point for ioctls |
| * @inode : inode (ignored) |
| * @filep : file operations pointer (ignored) |
| * @cmd : ioctl command |
| * @arg : user ioctl packet |
| */ |
| static int |
| mraid_mm_ioctl(struct inode *inode, struct file *filep, unsigned int cmd, |
| unsigned long arg) |
| { |
| uioc_t *kioc; |
| char signature[EXT_IOCTL_SIGN_SZ] = {0}; |
| int rval; |
| mraid_mmadp_t *adp; |
| uint8_t old_ioctl; |
| int drvrcmd_rval; |
| void __user *argp = (void __user *)arg; |
| |
| /* |
| * Make sure only USCSICMD are issued through this interface. |
| * MIMD application would still fire different command. |
| */ |
| |
| if ((_IOC_TYPE(cmd) != MEGAIOC_MAGIC) && (cmd != USCSICMD)) { |
| return (-EINVAL); |
| } |
| |
| /* |
| * Look for signature to see if this is the new or old ioctl format. |
| */ |
| if (copy_from_user(signature, argp, EXT_IOCTL_SIGN_SZ)) { |
| con_log(CL_ANN, (KERN_WARNING |
| "megaraid cmm: copy from usr addr failed\n")); |
| return (-EFAULT); |
| } |
| |
| if (memcmp(signature, EXT_IOCTL_SIGN, EXT_IOCTL_SIGN_SZ) == 0) |
| old_ioctl = 0; |
| else |
| old_ioctl = 1; |
| |
| /* |
| * At present, we don't support the new ioctl packet |
| */ |
| if (!old_ioctl ) |
| return (-EINVAL); |
| |
| /* |
| * If it is a driver ioctl (as opposed to fw ioctls), then we can |
| * handle the command locally. rval > 0 means it is not a drvr cmd |
| */ |
| rval = handle_drvrcmd(argp, old_ioctl, &drvrcmd_rval); |
| |
| if (rval < 0) |
| return rval; |
| else if (rval == 0) |
| return drvrcmd_rval; |
| |
| rval = 0; |
| if ((adp = mraid_mm_get_adapter(argp, &rval)) == NULL) { |
| return rval; |
| } |
| |
| /* |
| * Check if adapter can accept ioctl. We may have marked it offline |
| * if any previous kioc had timedout on this controller. |
| */ |
| if (!adp->quiescent) { |
| con_log(CL_ANN, (KERN_WARNING |
| "megaraid cmm: controller cannot accept cmds due to " |
| "earlier errors\n" )); |
| return -EFAULT; |
| } |
| |
| /* |
| * The following call will block till a kioc is available |
| */ |
| kioc = mraid_mm_alloc_kioc(adp); |
| |
| /* |
| * User sent the old mimd_t ioctl packet. Convert it to uioc_t. |
| */ |
| if ((rval = mimd_to_kioc(argp, adp, kioc))) { |
| mraid_mm_dealloc_kioc(adp, kioc); |
| return rval; |
| } |
| |
| kioc->done = ioctl_done; |
| |
| /* |
| * Issue the IOCTL to the low level driver. After the IOCTL completes |
| * release the kioc if and only if it was _not_ timedout. If it was |
| * timedout, that means that resources are still with low level driver. |
| */ |
| if ((rval = lld_ioctl(adp, kioc))) { |
| |
| if (!kioc->timedout) |
| mraid_mm_dealloc_kioc(adp, kioc); |
| |
| return rval; |
| } |
| |
| /* |
| * Convert the kioc back to user space |
| */ |
| rval = kioc_to_mimd(kioc, argp); |
| |
| /* |
| * Return the kioc to free pool |
| */ |
| mraid_mm_dealloc_kioc(adp, kioc); |
| |
| return rval; |
| } |
| |
| |
| /** |
| * mraid_mm_get_adapter - Returns corresponding adapters for the mimd packet |
| * @umimd : User space mimd_t ioctl packet |
| * @rval : returned success/error status |
| * |
| * The function return value is a pointer to the located @adapter. |
| */ |
| static mraid_mmadp_t * |
| mraid_mm_get_adapter(mimd_t __user *umimd, int *rval) |
| { |
| mraid_mmadp_t *adapter; |
| mimd_t mimd; |
| uint32_t adapno; |
| int iterator; |
| |
| |
| if (copy_from_user(&mimd, umimd, sizeof(mimd_t))) { |
| *rval = -EFAULT; |
| return NULL; |
| } |
| |
| adapno = GETADAP(mimd.ui.fcs.adapno); |
| |
| if (adapno >= adapters_count_g) { |
| *rval = -ENODEV; |
| return NULL; |
| } |
| |
| adapter = NULL; |
| iterator = 0; |
| |
| list_for_each_entry(adapter, &adapters_list_g, list) { |
| if (iterator++ == adapno) break; |
| } |
| |
| if (!adapter) { |
| *rval = -ENODEV; |
| return NULL; |
| } |
| |
| return adapter; |
| } |
| |
| /** |
| * handle_drvrcmd - Checks if the opcode is a driver cmd and if it is, handles it. |
| * @arg : packet sent by the user app |
| * @old_ioctl : mimd if 1; uioc otherwise |
| * @rval : pointer for command's returned value (not function status) |
| */ |
| static int |
| handle_drvrcmd(void __user *arg, uint8_t old_ioctl, int *rval) |
| { |
| mimd_t __user *umimd; |
| mimd_t kmimd; |
| uint8_t opcode; |
| uint8_t subopcode; |
| |
| if (old_ioctl) |
| goto old_packet; |
| else |
| goto new_packet; |
| |
| new_packet: |
| return (-ENOTSUPP); |
| |
| old_packet: |
| *rval = 0; |
| umimd = arg; |
| |
| if (copy_from_user(&kmimd, umimd, sizeof(mimd_t))) |
| return (-EFAULT); |
| |
| opcode = kmimd.ui.fcs.opcode; |
| subopcode = kmimd.ui.fcs.subopcode; |
| |
| /* |
| * If the opcode is 0x82 and the subopcode is either GET_DRVRVER or |
| * GET_NUMADP, then we can handle. Otherwise we should return 1 to |
| * indicate that we cannot handle this. |
| */ |
| if (opcode != 0x82) |
| return 1; |
| |
| switch (subopcode) { |
| |
| case MEGAIOC_QDRVRVER: |
| |
| if (copy_to_user(kmimd.data, &drvr_ver, sizeof(uint32_t))) |
| return (-EFAULT); |
| |
| return 0; |
| |
| case MEGAIOC_QNADAP: |
| |
| *rval = adapters_count_g; |
| |
| if (copy_to_user(kmimd.data, &adapters_count_g, |
| sizeof(uint32_t))) |
| return (-EFAULT); |
| |
| return 0; |
| |
| default: |
| /* cannot handle */ |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| |
| /** |
| * mimd_to_kioc - Converter from old to new ioctl format |
| * @umimd : user space old MIMD IOCTL |
| * @adp : adapter softstate |
| * @kioc : kernel space new format IOCTL |
| * |
| * Routine to convert MIMD interface IOCTL to new interface IOCTL packet. The |
| * new packet is in kernel space so that driver can perform operations on it |
| * freely. |
| */ |
| |
| static int |
| mimd_to_kioc(mimd_t __user *umimd, mraid_mmadp_t *adp, uioc_t *kioc) |
| { |
| mbox64_t *mbox64; |
| mbox_t *mbox; |
| mraid_passthru_t *pthru32; |
| uint32_t adapno; |
| uint8_t opcode; |
| uint8_t subopcode; |
| mimd_t mimd; |
| |
| if (copy_from_user(&mimd, umimd, sizeof(mimd_t))) |
| return (-EFAULT); |
| |
| /* |
| * Applications are not allowed to send extd pthru |
| */ |
| if ((mimd.mbox[0] == MBOXCMD_PASSTHRU64) || |
| (mimd.mbox[0] == MBOXCMD_EXTPTHRU)) |
| return (-EINVAL); |
| |
| opcode = mimd.ui.fcs.opcode; |
| subopcode = mimd.ui.fcs.subopcode; |
| adapno = GETADAP(mimd.ui.fcs.adapno); |
| |
| if (adapno >= adapters_count_g) |
| return (-ENODEV); |
| |
| kioc->adapno = adapno; |
| kioc->mb_type = MBOX_LEGACY; |
| kioc->app_type = APPTYPE_MIMD; |
| |
| switch (opcode) { |
| |
| case 0x82: |
| |
| if (subopcode == MEGAIOC_QADAPINFO) { |
| |
| kioc->opcode = GET_ADAP_INFO; |
| kioc->data_dir = UIOC_RD; |
| kioc->xferlen = sizeof(mraid_hba_info_t); |
| |
| if (mraid_mm_attach_buf(adp, kioc, kioc->xferlen)) |
| return (-ENOMEM); |
| } |
| else { |
| con_log(CL_ANN, (KERN_WARNING |
| "megaraid cmm: Invalid subop\n")); |
| return (-EINVAL); |
| } |
| |
| break; |
| |
| case 0x81: |
| |
| kioc->opcode = MBOX_CMD; |
| kioc->xferlen = mimd.ui.fcs.length; |
| kioc->user_data_len = kioc->xferlen; |
| kioc->user_data = mimd.ui.fcs.buffer; |
| |
| if (mraid_mm_attach_buf(adp, kioc, kioc->xferlen)) |
| return (-ENOMEM); |
| |
| if (mimd.outlen) kioc->data_dir = UIOC_RD; |
| if (mimd.inlen) kioc->data_dir |= UIOC_WR; |
| |
| break; |
| |
| case 0x80: |
| |
| kioc->opcode = MBOX_CMD; |
| kioc->xferlen = (mimd.outlen > mimd.inlen) ? |
| mimd.outlen : mimd.inlen; |
| kioc->user_data_len = kioc->xferlen; |
| kioc->user_data = mimd.data; |
| |
| if (mraid_mm_attach_buf(adp, kioc, kioc->xferlen)) |
| return (-ENOMEM); |
| |
| if (mimd.outlen) kioc->data_dir = UIOC_RD; |
| if (mimd.inlen) kioc->data_dir |= UIOC_WR; |
| |
| break; |
| |
| default: |
| return (-EINVAL); |
| } |
| |
| /* |
| * If driver command, nothing else to do |
| */ |
| if (opcode == 0x82) |
| return 0; |
| |
| /* |
| * This is a mailbox cmd; copy the mailbox from mimd |
| */ |
| mbox64 = (mbox64_t *)((unsigned long)kioc->cmdbuf); |
| mbox = &mbox64->mbox32; |
| memcpy(mbox, mimd.mbox, 14); |
| |
| if (mbox->cmd != MBOXCMD_PASSTHRU) { // regular DCMD |
| |
| mbox->xferaddr = (uint32_t)kioc->buf_paddr; |
| |
| if (kioc->data_dir & UIOC_WR) { |
| if (copy_from_user(kioc->buf_vaddr, kioc->user_data, |
| kioc->xferlen)) { |
| return (-EFAULT); |
| } |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * This is a regular 32-bit pthru cmd; mbox points to pthru struct. |
| * Just like in above case, the beginning for memblk is treated as |
| * a mailbox. The passthru will begin at next 1K boundary. And the |
| * data will start 1K after that. |
| */ |
| pthru32 = kioc->pthru32; |
| kioc->user_pthru = &umimd->pthru; |
| mbox->xferaddr = (uint32_t)kioc->pthru32_h; |
| |
| if (copy_from_user(pthru32, kioc->user_pthru, |
| sizeof(mraid_passthru_t))) { |
| return (-EFAULT); |
| } |
| |
| pthru32->dataxferaddr = kioc->buf_paddr; |
| if (kioc->data_dir & UIOC_WR) { |
| if (copy_from_user(kioc->buf_vaddr, kioc->user_data, |
| pthru32->dataxferlen)) { |
| return (-EFAULT); |
| } |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * mraid_mm_attch_buf - Attach a free dma buffer for required size |
| * @adp : Adapter softstate |
| * @kioc : kioc that the buffer needs to be attached to |
| * @xferlen : required length for buffer |
| * |
| * First we search for a pool with smallest buffer that is >= @xferlen. If |
| * that pool has no free buffer, we will try for the next bigger size. If none |
| * is available, we will try to allocate the smallest buffer that is >= |
| * @xferlen and attach it the pool. |
| */ |
| static int |
| mraid_mm_attach_buf(mraid_mmadp_t *adp, uioc_t *kioc, int xferlen) |
| { |
| mm_dmapool_t *pool; |
| int right_pool = -1; |
| unsigned long flags; |
| int i; |
| |
| kioc->pool_index = -1; |
| kioc->buf_vaddr = NULL; |
| kioc->buf_paddr = 0; |
| kioc->free_buf = 0; |
| |
| /* |
| * We need xferlen amount of memory. See if we can get it from our |
| * dma pools. If we don't get exact size, we will try bigger buffer |
| */ |
| |
| for (i = 0; i < MAX_DMA_POOLS; i++) { |
| |
| pool = &adp->dma_pool_list[i]; |
| |
| if (xferlen > pool->buf_size) |
| continue; |
| |
| if (right_pool == -1) |
| right_pool = i; |
| |
| spin_lock_irqsave(&pool->lock, flags); |
| |
| if (!pool->in_use) { |
| |
| pool->in_use = 1; |
| kioc->pool_index = i; |
| kioc->buf_vaddr = pool->vaddr; |
| kioc->buf_paddr = pool->paddr; |
| |
| spin_unlock_irqrestore(&pool->lock, flags); |
| return 0; |
| } |
| else { |
| spin_unlock_irqrestore(&pool->lock, flags); |
| continue; |
| } |
| } |
| |
| /* |
| * If xferlen doesn't match any of our pools, return error |
| */ |
| if (right_pool == -1) |
| return -EINVAL; |
| |
| /* |
| * We did not get any buffer from the preallocated pool. Let us try |
| * to allocate one new buffer. NOTE: This is a blocking call. |
| */ |
| pool = &adp->dma_pool_list[right_pool]; |
| |
| spin_lock_irqsave(&pool->lock, flags); |
| |
| kioc->pool_index = right_pool; |
| kioc->free_buf = 1; |
| kioc->buf_vaddr = pci_pool_alloc(pool->handle, GFP_KERNEL, |
| &kioc->buf_paddr); |
| spin_unlock_irqrestore(&pool->lock, flags); |
| |
| if (!kioc->buf_vaddr) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| /** |
| * mraid_mm_alloc_kioc - Returns a uioc_t from free list |
| * @adp : Adapter softstate for this module |
| * |
| * The kioc_semaphore is initialized with number of kioc nodes in the |
| * free kioc pool. If the kioc pool is empty, this function blocks till |
| * a kioc becomes free. |
| */ |
| static uioc_t * |
| mraid_mm_alloc_kioc(mraid_mmadp_t *adp) |
| { |
| uioc_t *kioc; |
| struct list_head* head; |
| unsigned long flags; |
| |
| down(&adp->kioc_semaphore); |
| |
| spin_lock_irqsave(&adp->kioc_pool_lock, flags); |
| |
| head = &adp->kioc_pool; |
| |
| if (list_empty(head)) { |
| up(&adp->kioc_semaphore); |
| spin_unlock_irqrestore(&adp->kioc_pool_lock, flags); |
| |
| con_log(CL_ANN, ("megaraid cmm: kioc list empty!\n")); |
| return NULL; |
| } |
| |
| kioc = list_entry(head->next, uioc_t, list); |
| list_del_init(&kioc->list); |
| |
| spin_unlock_irqrestore(&adp->kioc_pool_lock, flags); |
| |
| memset((caddr_t)(unsigned long)kioc->cmdbuf, 0, sizeof(mbox64_t)); |
| memset((caddr_t) kioc->pthru32, 0, sizeof(mraid_passthru_t)); |
| |
| kioc->buf_vaddr = NULL; |
| kioc->buf_paddr = 0; |
| kioc->pool_index =-1; |
| kioc->free_buf = 0; |
| kioc->user_data = NULL; |
| kioc->user_data_len = 0; |
| kioc->user_pthru = NULL; |
| kioc->timedout = 0; |
| |
| return kioc; |
| } |
| |
| /** |
| * mraid_mm_dealloc_kioc - Return kioc to free pool |
| * @adp : Adapter softstate |
| * @kioc : uioc_t node to be returned to free pool |
| */ |
| static void |
| mraid_mm_dealloc_kioc(mraid_mmadp_t *adp, uioc_t *kioc) |
| { |
| mm_dmapool_t *pool; |
| unsigned long flags; |
| |
| if (kioc->pool_index != -1) { |
| pool = &adp->dma_pool_list[kioc->pool_index]; |
| |
| /* This routine may be called in non-isr context also */ |
| spin_lock_irqsave(&pool->lock, flags); |
| |
| /* |
| * While attaching the dma buffer, if we didn't get the |
| * required buffer from the pool, we would have allocated |
| * it at the run time and set the free_buf flag. We must |
| * free that buffer. Otherwise, just mark that the buffer is |
| * not in use |
| */ |
| if (kioc->free_buf == 1) |
| pci_pool_free(pool->handle, kioc->buf_vaddr, |
| kioc->buf_paddr); |
| else |
| pool->in_use = 0; |
| |
| spin_unlock_irqrestore(&pool->lock, flags); |
| } |
| |
| /* Return the kioc to the free pool */ |
| spin_lock_irqsave(&adp->kioc_pool_lock, flags); |
| list_add(&kioc->list, &adp->kioc_pool); |
| spin_unlock_irqrestore(&adp->kioc_pool_lock, flags); |
| |
| /* increment the free kioc count */ |
| up(&adp->kioc_semaphore); |
| |
| return; |
| } |
| |
| /** |
| * lld_ioctl - Routine to issue ioctl to low level drvr |
| * @adp : The adapter handle |
| * @kioc : The ioctl packet with kernel addresses |
| */ |
| static int |
| lld_ioctl(mraid_mmadp_t *adp, uioc_t *kioc) |
| { |
| int rval; |
| struct timer_list timer; |
| struct timer_list *tp = NULL; |
| |
| kioc->status = -ENODATA; |
| rval = adp->issue_uioc(adp->drvr_data, kioc, IOCTL_ISSUE); |
| |
| if (rval) return rval; |
| |
| /* |
| * Start the timer |
| */ |
| if (adp->timeout > 0) { |
| tp = &timer; |
| init_timer(tp); |
| |
| tp->function = lld_timedout; |
| tp->data = (unsigned long)kioc; |
| tp->expires = jiffies + adp->timeout * HZ; |
| |
| add_timer(tp); |
| } |
| |
| /* |
| * Wait till the low level driver completes the ioctl. After this |
| * call, the ioctl either completed successfully or timedout. |
| */ |
| wait_event(wait_q, (kioc->status != -ENODATA)); |
| if (tp) { |
| del_timer_sync(tp); |
| } |
| |
| /* |
| * If the command had timedout, we mark the controller offline |
| * before returning |
| */ |
| if (kioc->timedout) { |
| adp->quiescent = 0; |
| } |
| |
| return kioc->status; |
| } |
| |
| |
| /** |
| * ioctl_done - callback from the low level driver |
| * @kioc : completed ioctl packet |
| */ |
| static void |
| ioctl_done(uioc_t *kioc) |
| { |
| uint32_t adapno; |
| int iterator; |
| mraid_mmadp_t* adapter; |
| |
| /* |
| * When the kioc returns from driver, make sure it still doesn't |
| * have ENODATA in status. Otherwise, driver will hang on wait_event |
| * forever |
| */ |
| if (kioc->status == -ENODATA) { |
| con_log(CL_ANN, (KERN_WARNING |
| "megaraid cmm: lld didn't change status!\n")); |
| |
| kioc->status = -EINVAL; |
| } |
| |
| /* |
| * Check if this kioc was timedout before. If so, nobody is waiting |
| * on this kioc. We don't have to wake up anybody. Instead, we just |
| * have to free the kioc |
| */ |
| if (kioc->timedout) { |
| iterator = 0; |
| adapter = NULL; |
| adapno = kioc->adapno; |
| |
| con_log(CL_ANN, ( KERN_WARNING "megaraid cmm: completed " |
| "ioctl that was timedout before\n")); |
| |
| list_for_each_entry(adapter, &adapters_list_g, list) { |
| if (iterator++ == adapno) break; |
| } |
| |
| kioc->timedout = 0; |
| |
| if (adapter) { |
| mraid_mm_dealloc_kioc( adapter, kioc ); |
| } |
| } |
| else { |
| wake_up(&wait_q); |
| } |
| } |
| |
| |
| /** |
| * lld_timedout - callback from the expired timer |
| * @ptr : ioctl packet that timed out |
| */ |
| static void |
| lld_timedout(unsigned long ptr) |
| { |
| uioc_t *kioc = (uioc_t *)ptr; |
| |
| kioc->status = -ETIME; |
| kioc->timedout = 1; |
| |
| con_log(CL_ANN, (KERN_WARNING "megaraid cmm: ioctl timed out\n")); |
| |
| wake_up(&wait_q); |
| } |
| |
| |
| /** |
| * kioc_to_mimd - Converter from new back to old format |
| * @kioc : Kernel space IOCTL packet (successfully issued) |
| * @mimd : User space MIMD packet |
| */ |
| static int |
| kioc_to_mimd(uioc_t *kioc, mimd_t __user *mimd) |
| { |
| mimd_t kmimd; |
| uint8_t opcode; |
| uint8_t subopcode; |
| |
| mbox64_t *mbox64; |
| mraid_passthru_t __user *upthru32; |
| mraid_passthru_t *kpthru32; |
| mcontroller_t cinfo; |
| mraid_hba_info_t *hinfo; |
| |
| |
| if (copy_from_user(&kmimd, mimd, sizeof(mimd_t))) |
| return (-EFAULT); |
| |
| opcode = kmimd.ui.fcs.opcode; |
| subopcode = kmimd.ui.fcs.subopcode; |
| |
| if (opcode == 0x82) { |
| switch (subopcode) { |
| |
| case MEGAIOC_QADAPINFO: |
| |
| hinfo = (mraid_hba_info_t *)(unsigned long) |
| kioc->buf_vaddr; |
| |
| hinfo_to_cinfo(hinfo, &cinfo); |
| |
| if (copy_to_user(kmimd.data, &cinfo, sizeof(cinfo))) |
| return (-EFAULT); |
| |
| return 0; |
| |
| default: |
| return (-EINVAL); |
| } |
| |
| return 0; |
| } |
| |
| mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf; |
| |
| if (kioc->user_pthru) { |
| |
| upthru32 = kioc->user_pthru; |
| kpthru32 = kioc->pthru32; |
| |
| if (copy_to_user(&upthru32->scsistatus, |
| &kpthru32->scsistatus, |
| sizeof(uint8_t))) { |
| return (-EFAULT); |
| } |
| } |
| |
| if (kioc->user_data) { |
| if (copy_to_user(kioc->user_data, kioc->buf_vaddr, |
| kioc->user_data_len)) { |
| return (-EFAULT); |
| } |
| } |
| |
| if (copy_to_user(&mimd->mbox[17], |
| &mbox64->mbox32.status, sizeof(uint8_t))) { |
| return (-EFAULT); |
| } |
| |
| return 0; |
| } |
| |
| |
| /** |
| * hinfo_to_cinfo - Convert new format hba info into old format |
| * @hinfo : New format, more comprehensive adapter info |
| * @cinfo : Old format adapter info to support mimd_t apps |
| */ |
| static void |
| hinfo_to_cinfo(mraid_hba_info_t *hinfo, mcontroller_t *cinfo) |
| { |
| if (!hinfo || !cinfo) |
| return; |
| |
| cinfo->base = hinfo->baseport; |
| cinfo->irq = hinfo->irq; |
| cinfo->numldrv = hinfo->num_ldrv; |
| cinfo->pcibus = hinfo->pci_bus; |
| cinfo->pcidev = hinfo->pci_slot; |
| cinfo->pcifun = PCI_FUNC(hinfo->pci_dev_fn); |
| cinfo->pciid = hinfo->pci_device_id; |
| cinfo->pcivendor = hinfo->pci_vendor_id; |
| cinfo->pcislot = hinfo->pci_slot; |
| cinfo->uid = hinfo->unique_id; |
| } |
| |
| |
| /** |
| * mraid_mm_register_adp - Registration routine for low level drivers |
| * @lld_adp : Adapter objejct |
| */ |
| int |
| mraid_mm_register_adp(mraid_mmadp_t *lld_adp) |
| { |
| mraid_mmadp_t *adapter; |
| mbox64_t *mbox_list; |
| uioc_t *kioc; |
| uint32_t rval; |
| int i; |
| |
| |
| if (lld_adp->drvr_type != DRVRTYPE_MBOX) |
| return (-EINVAL); |
| |
| adapter = kmalloc(sizeof(mraid_mmadp_t), GFP_KERNEL); |
| |
| if (!adapter) |
| return -ENOMEM; |
| |
| memset(adapter, 0, sizeof(mraid_mmadp_t)); |
| |
| adapter->unique_id = lld_adp->unique_id; |
| adapter->drvr_type = lld_adp->drvr_type; |
| adapter->drvr_data = lld_adp->drvr_data; |
| adapter->pdev = lld_adp->pdev; |
| adapter->issue_uioc = lld_adp->issue_uioc; |
| adapter->timeout = lld_adp->timeout; |
| adapter->max_kioc = lld_adp->max_kioc; |
| adapter->quiescent = 1; |
| |
| /* |
| * Allocate single blocks of memory for all required kiocs, |
| * mailboxes and passthru structures. |
| */ |
| adapter->kioc_list = kmalloc(sizeof(uioc_t) * lld_adp->max_kioc, |
| GFP_KERNEL); |
| adapter->mbox_list = kmalloc(sizeof(mbox64_t) * lld_adp->max_kioc, |
| GFP_KERNEL); |
| adapter->pthru_dma_pool = pci_pool_create("megaraid mm pthru pool", |
| adapter->pdev, |
| sizeof(mraid_passthru_t), |
| 16, 0); |
| |
| if (!adapter->kioc_list || !adapter->mbox_list || |
| !adapter->pthru_dma_pool) { |
| |
| con_log(CL_ANN, (KERN_WARNING |
| "megaraid cmm: out of memory, %s %d\n", __FUNCTION__, |
| __LINE__)); |
| |
| rval = (-ENOMEM); |
| |
| goto memalloc_error; |
| } |
| |
| /* |
| * Slice kioc_list and make a kioc_pool with the individiual kiocs |
| */ |
| INIT_LIST_HEAD(&adapter->kioc_pool); |
| spin_lock_init(&adapter->kioc_pool_lock); |
| sema_init(&adapter->kioc_semaphore, lld_adp->max_kioc); |
| |
| mbox_list = (mbox64_t *)adapter->mbox_list; |
| |
| for (i = 0; i < lld_adp->max_kioc; i++) { |
| |
| kioc = adapter->kioc_list + i; |
| kioc->cmdbuf = (uint64_t)(unsigned long)(mbox_list + i); |
| kioc->pthru32 = pci_pool_alloc(adapter->pthru_dma_pool, |
| GFP_KERNEL, &kioc->pthru32_h); |
| |
| if (!kioc->pthru32) { |
| |
| con_log(CL_ANN, (KERN_WARNING |
| "megaraid cmm: out of memory, %s %d\n", |
| __FUNCTION__, __LINE__)); |
| |
| rval = (-ENOMEM); |
| |
| goto pthru_dma_pool_error; |
| } |
| |
| list_add_tail(&kioc->list, &adapter->kioc_pool); |
| } |
| |
| // Setup the dma pools for data buffers |
| if ((rval = mraid_mm_setup_dma_pools(adapter)) != 0) { |
| goto dma_pool_error; |
| } |
| |
| list_add_tail(&adapter->list, &adapters_list_g); |
| |
| adapters_count_g++; |
| |
| return 0; |
| |
| dma_pool_error: |
| /* Do nothing */ |
| |
| pthru_dma_pool_error: |
| |
| for (i = 0; i < lld_adp->max_kioc; i++) { |
| kioc = adapter->kioc_list + i; |
| if (kioc->pthru32) { |
| pci_pool_free(adapter->pthru_dma_pool, kioc->pthru32, |
| kioc->pthru32_h); |
| } |
| } |
| |
| memalloc_error: |
| |
| kfree(adapter->kioc_list); |
| kfree(adapter->mbox_list); |
| |
| if (adapter->pthru_dma_pool) |
| pci_pool_destroy(adapter->pthru_dma_pool); |
| |
| kfree(adapter); |
| |
| return rval; |
| } |
| |
| |
| /** |
| * mraid_mm_adapter_app_handle - return the application handle for this adapter |
| * @unique_id : adapter unique identifier |
| * |
| * For the given driver data, locate the adapter in our global list and |
| * return the corresponding handle, which is also used by applications to |
| * uniquely identify an adapter. |
| * |
| * Return adapter handle if found in the list. |
| * Return 0 if adapter could not be located, should never happen though. |
| */ |
| uint32_t |
| mraid_mm_adapter_app_handle(uint32_t unique_id) |
| { |
| mraid_mmadp_t *adapter; |
| mraid_mmadp_t *tmp; |
| int index = 0; |
| |
| list_for_each_entry_safe(adapter, tmp, &adapters_list_g, list) { |
| |
| if (adapter->unique_id == unique_id) { |
| |
| return MKADAP(index); |
| } |
| |
| index++; |
| } |
| |
| return 0; |
| } |
| |
| |
| /** |
| * mraid_mm_setup_dma_pools - Set up dma buffer pools per adapter |
| * @adp : Adapter softstate |
| * |
| * We maintain a pool of dma buffers per each adapter. Each pool has one |
| * buffer. E.g, we may have 5 dma pools - one each for 4k, 8k ... 64k buffers. |
| * We have just one 4k buffer in 4k pool, one 8k buffer in 8k pool etc. We |
| * dont' want to waste too much memory by allocating more buffers per each |
| * pool. |
| */ |
| static int |
| mraid_mm_setup_dma_pools(mraid_mmadp_t *adp) |
| { |
| mm_dmapool_t *pool; |
| int bufsize; |
| int i; |
| |
| /* |
| * Create MAX_DMA_POOLS number of pools |
| */ |
| bufsize = MRAID_MM_INIT_BUFF_SIZE; |
| |
| for (i = 0; i < MAX_DMA_POOLS; i++){ |
| |
| pool = &adp->dma_pool_list[i]; |
| |
| pool->buf_size = bufsize; |
| spin_lock_init(&pool->lock); |
| |
| pool->handle = pci_pool_create("megaraid mm data buffer", |
| adp->pdev, bufsize, 16, 0); |
| |
| if (!pool->handle) { |
| goto dma_pool_setup_error; |
| } |
| |
| pool->vaddr = pci_pool_alloc(pool->handle, GFP_KERNEL, |
| &pool->paddr); |
| |
| if (!pool->vaddr) |
| goto dma_pool_setup_error; |
| |
| bufsize = bufsize * 2; |
| } |
| |
| return 0; |
| |
| dma_pool_setup_error: |
| |
| mraid_mm_teardown_dma_pools(adp); |
| return (-ENOMEM); |
| } |
| |
| |
| /** |
| * mraid_mm_unregister_adp - Unregister routine for low level drivers |
| * @unique_id : UID of the adpater |
| * |
| * Assumes no outstanding ioctls to llds. |
| */ |
| int |
| mraid_mm_unregister_adp(uint32_t unique_id) |
| { |
| mraid_mmadp_t *adapter; |
| mraid_mmadp_t *tmp; |
| |
| list_for_each_entry_safe(adapter, tmp, &adapters_list_g, list) { |
| |
| |
| if (adapter->unique_id == unique_id) { |
| |
| adapters_count_g--; |
| |
| list_del_init(&adapter->list); |
| |
| mraid_mm_free_adp_resources(adapter); |
| |
| kfree(adapter); |
| |
| con_log(CL_ANN, ( |
| "megaraid cmm: Unregistered one adapter:%#x\n", |
| unique_id)); |
| |
| return 0; |
| } |
| } |
| |
| return (-ENODEV); |
| } |
| |
| /** |
| * mraid_mm_free_adp_resources - Free adapter softstate |
| * @adp : Adapter softstate |
| */ |
| static void |
| mraid_mm_free_adp_resources(mraid_mmadp_t *adp) |
| { |
| uioc_t *kioc; |
| int i; |
| |
| mraid_mm_teardown_dma_pools(adp); |
| |
| for (i = 0; i < adp->max_kioc; i++) { |
| |
| kioc = adp->kioc_list + i; |
| |
| pci_pool_free(adp->pthru_dma_pool, kioc->pthru32, |
| kioc->pthru32_h); |
| } |
| |
| kfree(adp->kioc_list); |
| kfree(adp->mbox_list); |
| |
| pci_pool_destroy(adp->pthru_dma_pool); |
| |
| |
| return; |
| } |
| |
| |
| /** |
| * mraid_mm_teardown_dma_pools - Free all per adapter dma buffers |
| * @adp : Adapter softstate |
| */ |
| static void |
| mraid_mm_teardown_dma_pools(mraid_mmadp_t *adp) |
| { |
| int i; |
| mm_dmapool_t *pool; |
| |
| for (i = 0; i < MAX_DMA_POOLS; i++) { |
| |
| pool = &adp->dma_pool_list[i]; |
| |
| if (pool->handle) { |
| |
| if (pool->vaddr) |
| pci_pool_free(pool->handle, pool->vaddr, |
| pool->paddr); |
| |
| pci_pool_destroy(pool->handle); |
| pool->handle = NULL; |
| } |
| } |
| |
| return; |
| } |
| |
| /** |
| * mraid_mm_init - Module entry point |
| */ |
| static int __init |
| mraid_mm_init(void) |
| { |
| // Announce the driver version |
| con_log(CL_ANN, (KERN_INFO "megaraid cmm: %s %s\n", |
| LSI_COMMON_MOD_VERSION, LSI_COMMON_MOD_EXT_VERSION)); |
| |
| majorno = register_chrdev(0, "megadev", &lsi_fops); |
| |
| if (majorno < 0) { |
| con_log(CL_ANN, ("megaraid cmm: cannot get major\n")); |
| return majorno; |
| } |
| |
| init_waitqueue_head(&wait_q); |
| |
| INIT_LIST_HEAD(&adapters_list_g); |
| |
| return 0; |
| } |
| |
| |
| #ifdef CONFIG_COMPAT |
| /** |
| * mraid_mm_compat_ioctl - 32bit to 64bit ioctl conversion routine |
| * @filep : file operations pointer (ignored) |
| * @cmd : ioctl command |
| * @arg : user ioctl packet |
| */ |
| static long |
| mraid_mm_compat_ioctl(struct file *filep, unsigned int cmd, |
| unsigned long arg) |
| { |
| int err; |
| |
| err = mraid_mm_ioctl(NULL, filep, cmd, arg); |
| |
| return err; |
| } |
| #endif |
| |
| /** |
| * mraid_mm_exit - Module exit point |
| */ |
| static void __exit |
| mraid_mm_exit(void) |
| { |
| con_log(CL_DLEVEL1 , ("exiting common mod\n")); |
| |
| unregister_chrdev(majorno, "megadev"); |
| } |
| |
| module_init(mraid_mm_init); |
| module_exit(mraid_mm_exit); |
| |
| /* vi: set ts=8 sw=8 tw=78: */ |