diff options
Diffstat (limited to 'drivers/scsi/megaraid/megaraid_mm.c')
| -rw-r--r-- | drivers/scsi/megaraid/megaraid_mm.c | 145 |
1 files changed, 77 insertions, 68 deletions
diff --git a/drivers/scsi/megaraid/megaraid_mm.c b/drivers/scsi/megaraid/megaraid_mm.c index 37d110e864c..a70692779a1 100644 --- a/drivers/scsi/megaraid/megaraid_mm.c +++ b/drivers/scsi/megaraid/megaraid_mm.c @@ -10,17 +10,20 @@ * 2 of the License, or (at your option) any later version. * * FILE : megaraid_mm.c - * Version : v2.20.2.6 (Mar 7 2005) + * Version : v2.20.2.7 (Jul 16 2006) * * Common management module */ - +#include <linux/sched.h> +#include <linux/slab.h> +#include <linux/mutex.h> #include "megaraid_mm.h" // Entry points for char node driver +static DEFINE_MUTEX(mraid_mm_mutex); static int mraid_mm_open(struct inode *, struct file *); -static int mraid_mm_ioctl(struct inode *, struct file *, uint, unsigned long); +static long mraid_mm_unlocked_ioctl(struct file *, uint, unsigned long); // routines to convert to and from the old the format @@ -59,29 +62,35 @@ 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 uint32_t drvr_ver = 0x02200207; 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 = { +static const struct file_operations lsi_fops = { .open = mraid_mm_open, - .ioctl = mraid_mm_ioctl, + .unlocked_ioctl = mraid_mm_unlocked_ioctl, #ifdef CONFIG_COMPAT .compat_ioctl = mraid_mm_compat_ioctl, #endif .owner = THIS_MODULE, + .llseek = noop_llseek, +}; + +static struct miscdevice megaraid_mm_dev = { + .minor = MISC_DYNAMIC_MINOR, + .name = "megadev0", + .fops = &lsi_fops, }; /** * mraid_mm_open - open routine for char node interface - * @inod : unused + * @inode : unused * @filep : unused * - * allow ioctl operations by apps only if they superuser privilege + * Allow ioctl operations by apps only if they have superuser privilege. */ static int mraid_mm_open(struct inode *inode, struct file *filep) @@ -102,8 +111,7 @@ mraid_mm_open(struct inode *inode, struct file *filep) * @arg : user ioctl packet */ static int -mraid_mm_ioctl(struct inode *inode, struct file *filep, unsigned int cmd, - unsigned long arg) +mraid_mm_ioctl(struct file *filep, unsigned int cmd, unsigned long arg) { uioc_t *kioc; char signature[EXT_IOCTL_SIGN_SZ] = {0}; @@ -210,11 +218,26 @@ mraid_mm_ioctl(struct inode *inode, struct file *filep, unsigned int cmd, return rval; } +static long +mraid_mm_unlocked_ioctl(struct file *filep, unsigned int cmd, + unsigned long arg) +{ + int err; + + /* inconsistent: mraid_mm_compat_ioctl doesn't take the BKL */ + mutex_lock(&mraid_mm_mutex); + err = mraid_mm_ioctl(filep, cmd, arg); + mutex_unlock(&mraid_mm_mutex); + + return err; +} /** * mraid_mm_get_adapter - Returns corresponding adapters for the mimd packet * @umimd : User space mimd_t ioctl packet - * @adapter : pointer to the adapter (OUT) + * @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) @@ -252,11 +275,11 @@ mraid_mm_get_adapter(mimd_t __user *umimd, int *rval) return adapter; } -/* - * handle_drvrcmd - This routine checks if the opcode is a driver - * cmd and if it is, handles it. +/** + * 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) @@ -322,8 +345,8 @@ old_packet: /** * 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 @@ -463,6 +486,8 @@ mimd_to_kioc(mimd_t __user *umimd, mraid_mmadp_t *adp, uioc_t *kioc) pthru32->dataxferaddr = kioc->buf_paddr; if (kioc->data_dir & UIOC_WR) { + if (pthru32->dataxferlen > kioc->xferlen) + return -EINVAL; if (copy_from_user(kioc->buf_vaddr, kioc->user_data, pthru32->dataxferlen)) { return (-EFAULT); @@ -474,7 +499,6 @@ mimd_to_kioc(mimd_t __user *umimd, mraid_mmadp_t *adp, uioc_t *kioc) /** * 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 @@ -607,7 +631,6 @@ mraid_mm_alloc_kioc(mraid_mmadp_t *adp) /** * mraid_mm_dealloc_kioc - Return kioc to free pool - * * @adp : Adapter softstate * @kioc : uioc_t node to be returned to free pool */ @@ -652,7 +675,6 @@ mraid_mm_dealloc_kioc(mraid_mmadp_t *adp, uioc_t *kioc) /** * lld_ioctl - Routine to issue ioctl to low level drvr - * * @adp : The adapter handle * @kioc : The ioctl packet with kernel addresses */ @@ -705,7 +727,6 @@ lld_ioctl(mraid_mmadp_t *adp, uioc_t *kioc) /** * ioctl_done - callback from the low level driver - * * @kioc : completed ioctl packet */ static void @@ -756,9 +777,8 @@ ioctl_done(uioc_t *kioc) } -/* - * lld_timedout : callback from the expired timer - * +/** + * lld_timedout - callback from the expired timer * @ptr : ioctl packet that timed out */ static void @@ -776,8 +796,7 @@ lld_timedout(unsigned long ptr) /** - * kioc_to_mimd : Converter from new back to old format - * + * kioc_to_mimd - Converter from new back to old format * @kioc : Kernel space IOCTL packet (successfully issued) * @mimd : User space MIMD packet */ @@ -855,7 +874,6 @@ kioc_to_mimd(uioc_t *kioc, mimd_t __user *mimd) /** * 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 */ @@ -878,10 +896,9 @@ hinfo_to_cinfo(mraid_hba_info_t *hinfo, mcontroller_t *cinfo) } -/* - * mraid_mm_register_adp - Registration routine for low level drvrs - * - * @adp : Adapter objejct +/** + * mraid_mm_register_adp - Registration routine for low level drivers + * @lld_adp : Adapter object */ int mraid_mm_register_adp(mraid_mmadp_t *lld_adp) @@ -896,14 +913,11 @@ mraid_mm_register_adp(mraid_mmadp_t *lld_adp) if (lld_adp->drvr_type != DRVRTYPE_MBOX) return (-EINVAL); - adapter = kmalloc(sizeof(mraid_mmadp_t), GFP_KERNEL); + adapter = kzalloc(sizeof(mraid_mmadp_t), GFP_KERNEL); - if (!adapter) { - rval = -ENOMEM; - goto memalloc_error; - } + 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; @@ -931,7 +945,7 @@ mraid_mm_register_adp(mraid_mmadp_t *lld_adp) !adapter->pthru_dma_pool) { con_log(CL_ANN, (KERN_WARNING - "megaraid cmm: out of memory, %s %d\n", __FUNCTION__, + "megaraid cmm: out of memory, %s %d\n", __func__, __LINE__)); rval = (-ENOMEM); @@ -959,7 +973,7 @@ mraid_mm_register_adp(mraid_mmadp_t *lld_adp) con_log(CL_ANN, (KERN_WARNING "megaraid cmm: out of memory, %s %d\n", - __FUNCTION__, __LINE__)); + __func__, __LINE__)); rval = (-ENOMEM); @@ -995,17 +1009,13 @@ pthru_dma_pool_error: memalloc_error: - if (adapter->kioc_list) - kfree(adapter->kioc_list); - - if (adapter->mbox_list) - kfree(adapter->mbox_list); + kfree(adapter->kioc_list); + kfree(adapter->mbox_list); if (adapter->pthru_dma_pool) pci_pool_destroy(adapter->pthru_dma_pool); - if (adapter) - kfree(adapter); + kfree(adapter); return rval; } @@ -1013,15 +1023,14 @@ memalloc_error: /** * mraid_mm_adapter_app_handle - return the application handle for this adapter + * @unique_id : adapter unique identifier * - * For the given driver data, locate the adadpter in our global list and + * 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. * - * @param unique_id : adapter unique identifier - * - * @return adapter handle if found in the list - * @return 0 if adapter could not be located, should never happen though + * 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) @@ -1046,7 +1055,6 @@ mraid_mm_adapter_app_handle(uint32_t unique_id) /** * 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 @@ -1099,11 +1107,11 @@ dma_pool_setup_error: } -/* +/** * mraid_mm_unregister_adp - Unregister routine for low level drivers - * Assume no outstanding ioctls to llds. - * * @unique_id : UID of the adpater + * + * Assumes no outstanding ioctls to llds. */ int mraid_mm_unregister_adp(uint32_t unique_id) @@ -1137,7 +1145,6 @@ mraid_mm_unregister_adp(uint32_t unique_id) /** * mraid_mm_free_adp_resources - Free adapter softstate - * * @adp : Adapter softstate */ static void @@ -1157,7 +1164,6 @@ mraid_mm_free_adp_resources(mraid_mmadp_t *adp) } kfree(adp->kioc_list); - kfree(adp->mbox_list); pci_pool_destroy(adp->pthru_dma_pool); @@ -1169,7 +1175,6 @@ mraid_mm_free_adp_resources(mraid_mmadp_t *adp) /** * mraid_mm_teardown_dma_pools - Free all per adapter dma buffers - * * @adp : Adapter softstate */ static void @@ -1197,20 +1202,21 @@ mraid_mm_teardown_dma_pools(mraid_mmadp_t *adp) } /** - * mraid_mm_init : Module entry point + * mraid_mm_init - Module entry point */ static int __init mraid_mm_init(void) { + int err; + // 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; + err = misc_register(&megaraid_mm_dev); + if (err < 0) { + con_log(CL_ANN, ("megaraid cmm: cannot register misc device\n")); + return err; } init_waitqueue_head(&wait_q); @@ -1221,31 +1227,34 @@ mraid_mm_init(void) } +#ifdef CONFIG_COMPAT /** - * mraid_mm_compat_ioctl : 32bit to 64bit ioctl conversion routine + * mraid_mm_compat_ioctl - 32bit to 64bit ioctl conversion routine + * @filep : file operations pointer (ignored) + * @cmd : ioctl command + * @arg : user ioctl packet */ -#ifdef CONFIG_COMPAT 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); + err = mraid_mm_ioctl(filep, cmd, arg); return err; } #endif /** - * mraid_mm_exit : Module exit point + * 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"); + misc_deregister(&megaraid_mm_dev); } module_init(mraid_mm_init); |