Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/scsi/megaraid/megaraid_mm.c b/drivers/scsi/megaraid/megaraid_mm.c
new file mode 100644
index 0000000..9f1b550
--- /dev/null
+++ b/drivers/scsi/megaraid/megaraid_mm.c
@@ -0,0 +1,1255 @@
+/*
+ *
+ * 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 : v2.20.2.5 (Jan 21 2005)
+ *
+ * Common management module
+ */
+
+#include "megaraid_mm.h"
+#include <linux/smp_lock.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 = 0x02200201;
+
+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
+ * @inod : unused
+ * @filep : unused
+ *
+ * allow ioctl operations by apps only if they 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
+ * @adapter : pointer to the adapter (OUT)
+ */
+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 - This routine 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
+ */
+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
+ * @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 drvrs
+ *
+ * @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) {
+ rval = -ENOMEM;
+ goto memalloc_error;
+ }
+
+ 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:
+
+ if (adapter->kioc_list)
+ kfree(adapter->kioc_list);
+
+ if (adapter->mbox_list)
+ kfree(adapter->mbox_list);
+
+ if (adapter->pthru_dma_pool)
+ pci_pool_destroy(adapter->pthru_dma_pool);
+
+ if (adapter)
+ kfree(adapter);
+
+ return rval;
+}
+
+
+/**
+ * mraid_mm_adapter_app_handle - return the application handle for this adapter
+ *
+ * For the given driver data, locate the adadpter 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
+ */
+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
+ * Assume no outstanding ioctls to llds.
+ *
+ * @unique_id : UID of the adpater
+ */
+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;
+}
+
+
+/**
+ * mraid_mm_compat_ioctl : 32bit to 64bit ioctl conversion routine
+ */
+#ifdef CONFIG_COMPAT
+static long
+mraid_mm_compat_ioctl(struct file *filep, unsigned int cmd,
+ unsigned long arg)
+{
+ int err;
+ lock_kernel();
+ err = mraid_mm_ioctl(NULL, filep, cmd, arg);
+ unlock_kernel();
+ 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: */