/******************************************************************* * This file is part of the Emulex Linux Device Driver for * * Fibre Channel Host Bus Adapters. * * Copyright (C) 2004-2008 Emulex. All rights reserved. * * EMULEX and SLI are trademarks of Emulex. * * www.emulex.com * * Portions Copyright (C) 2004-2005 Christoph Hellwig * * * * This program is free software; you can redistribute it and/or * * modify it under the terms of version 2 of the GNU General * * Public License as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful. * * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND * * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, * * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE * * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD * * TO BE LEGALLY INVALID. See the GNU General Public License for * * more details, a copy of which can be found in the file COPYING * * included with this package. * *******************************************************************/ #include <linux/mempool.h> #include <linux/pci.h> #include <linux/interrupt.h> #include <scsi/scsi_device.h> #include <scsi/scsi_transport_fc.h> #include <scsi/scsi.h> #include "lpfc_hw.h" #include "lpfc_sli.h" #include "lpfc_nl.h" #include "lpfc_disc.h" #include "lpfc_scsi.h" #include "lpfc.h" #include "lpfc_crtn.h" #define LPFC_MBUF_POOL_SIZE 64 /* max elements in MBUF safety pool */ #define LPFC_MEM_POOL_SIZE 64 /* max elem in non-DMA safety pool */ /** * lpfc_mem_alloc: create and allocate all PCI and memory pools * @phba: HBA to allocate pools for * * Description: Creates and allocates PCI pools lpfc_scsi_dma_buf_pool, * lpfc_mbuf_pool, lpfc_hbq_pool. Creates and allocates kmalloc-backed mempools * for LPFC_MBOXQ_t and lpfc_nodelist. Also allocates the VPI bitmask. * * Notes: Not interrupt-safe. Must be called with no locks held. If any * allocation fails, frees all successfully allocated memory before returning. * * Returns: * 0 on success * -ENOMEM on failure (if any memory allocations fail) **/ int lpfc_mem_alloc(struct lpfc_hba * phba) { struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool; int longs; int i; phba->lpfc_scsi_dma_buf_pool = pci_pool_create("lpfc_scsi_dma_buf_pool", phba->pcidev, phba->cfg_sg_dma_buf_size, 8, 0); if (!phba->lpfc_scsi_dma_buf_pool) goto fail; phba->lpfc_mbuf_pool = pci_pool_create("lpfc_mbuf_pool", phba->pcidev, LPFC_BPL_SIZE, 8,0); if (!phba->lpfc_mbuf_pool) goto fail_free_dma_buf_pool; pool->elements = kmalloc(sizeof(struct lpfc_dmabuf) * LPFC_MBUF_POOL_SIZE, GFP_KERNEL); if (!pool->elements) goto fail_free_lpfc_mbuf_pool; pool->max_count = 0; pool->current_count = 0; for ( i = 0; i < LPFC_MBUF_POOL_SIZE; i++) { pool->elements[i].virt = pci_pool_alloc(phba->lpfc_mbuf_pool, GFP_KERNEL, &pool->elements[i].phys); if (!pool->elements[i].virt) goto fail_free_mbuf_pool; pool->max_count++; pool->current_count++; } phba->mbox_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE, sizeof(LPFC_MBOXQ_t)); if (!phba->mbox_mem_pool) goto fail_free_mbuf_pool; phba->nlp_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE, sizeof(struct lpfc_nodelist)); if (!phba->nlp_mem_pool) goto fail_free_mbox_pool; phba->lpfc_hbq_pool = pci_pool_create("lpfc_hbq_pool",phba->pcidev, LPFC_BPL_SIZE, 8, 0); if (!phba->lpfc_hbq_pool) goto fail_free_nlp_mem_pool; /* vpi zero is reserved for the physical port so add 1 to max */ longs = ((phba->max_vpi + 1) + BITS_PER_LONG - 1) / BITS_PER_LONG; phba->vpi_bmask = kzalloc(longs * sizeof(unsigned long), GFP_KERNEL); if (!phba->vpi_bmask) goto fail_free_hbq_pool; return 0; fail_free_hbq_pool: lpfc_sli_hbqbuf_free_all(phba); pci_pool_destroy(phba->lpfc_hbq_pool); fail_free_nlp_mem_pool: mempool_destroy(phba->nlp_mem_pool); phba->nlp_mem_pool = NULL; fail_free_mbox_pool: mempool_destroy(phba->mbox_mem_pool); phba->mbox_mem_pool = NULL; fail_free_mbuf_pool: while (i--) pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt, pool->elements[i].phys); kfree(pool->elements); fail_free_lpfc_mbuf_pool: pci_pool_destroy(phba->lpfc_mbuf_pool); phba->lpfc_mbuf_pool = NULL; fail_free_dma_buf_pool: pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool); phba->lpfc_scsi_dma_buf_pool = NULL; fail: return -ENOMEM; } /** * lpfc_mem_free: Frees all PCI and memory allocated by lpfc_mem_alloc * @phba: HBA to free memory for * * Description: Frees PCI pools lpfc_scsi_dma_buf_pool, lpfc_mbuf_pool, * lpfc_hbq_pool. Frees kmalloc-backed mempools for LPFC_MBOXQ_t and * lpfc_nodelist. Also frees the VPI bitmask. * * Returns: None **/ void lpfc_mem_free(struct lpfc_hba * phba) { struct lpfc_sli *psli = &phba->sli; struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool; LPFC_MBOXQ_t *mbox, *next_mbox; struct lpfc_dmabuf *mp; int i; kfree(phba->vpi_bmask); lpfc_sli_hbqbuf_free_all(phba); list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq, list) { mp = (struct lpfc_dmabuf *) (mbox->context1); if (mp) { lpfc_mbuf_free(phba, mp->virt, mp->phys); kfree(mp); } list_del(&mbox->list); mempool_free(mbox, phba->mbox_mem_pool); } list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq_cmpl, list) { mp = (struct lpfc_dmabuf *) (mbox->context1); if (mp) { lpfc_mbuf_free(phba, mp->virt, mp->phys); kfree(mp); } list_del(&mbox->list); mempool_free(mbox, phba->mbox_mem_pool); } psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE; if (psli->mbox_active) { mbox = psli->mbox_active; mp = (struct lpfc_dmabuf *) (mbox->context1); if (mp) { lpfc_mbuf_free(phba, mp->virt, mp->phys); kfree(mp); } mempool_free(mbox, phba->mbox_mem_pool); psli->mbox_active = NULL; } for (i = 0; i < pool->current_count; i++) pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt, pool->elements[i].phys); kfree(pool->elements); pci_pool_destroy(phba->lpfc_hbq_pool); mempool_destroy(phba->nlp_mem_pool); mempool_destroy(phba->mbox_mem_pool); pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool); pci_pool_destroy(phba->lpfc_mbuf_pool); phba->lpfc_hbq_pool = NULL; phba->nlp_mem_pool = NULL; phba->mbox_mem_pool = NULL; phba->lpfc_scsi_dma_buf_pool = NULL; phba->lpfc_mbuf_pool = NULL; /* Free the iocb lookup array */ kfree(psli->iocbq_lookup); psli->iocbq_lookup = NULL; } /** * lpfc_mbuf_alloc: Allocate an mbuf from the lpfc_mbuf_pool PCI pool * @phba: HBA which owns the pool to allocate from * @mem_flags: indicates if this is a priority (MEM_PRI) allocation * @handle: used to return the DMA-mapped address of the mbuf * * Description: Allocates a DMA-mapped buffer from the lpfc_mbuf_pool PCI pool. * Allocates from generic pci_pool_alloc function first and if that fails and * mem_flags has MEM_PRI set (the only defined flag), returns an mbuf from the * HBA's pool. * * Notes: Not interrupt-safe. Must be called with no locks held. Takes * phba->hbalock. * * Returns: * pointer to the allocated mbuf on success * NULL on failure **/ void * lpfc_mbuf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle) { struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool; unsigned long iflags; void *ret; ret = pci_pool_alloc(phba->lpfc_mbuf_pool, GFP_KERNEL, handle); spin_lock_irqsave(&phba->hbalock, iflags); if (!ret && (mem_flags & MEM_PRI) && pool->current_count) { pool->current_count--; ret = pool->elements[pool->current_count].virt; *handle = pool->elements[pool->current_count].phys; } spin_unlock_irqrestore(&phba->hbalock, iflags); return ret; } /** * __lpfc_mem_free: Free an mbuf from the lpfc_mbuf_pool PCI pool (locked) * @phba: HBA which owns the pool to return to * @virt: mbuf to free * @dma: the DMA-mapped address of the lpfc_mbuf_pool to be freed * * Description: Returns an mbuf lpfc_mbuf_pool to the lpfc_mbuf_safety_pool if * it is below its max_count, frees the mbuf otherwise. * * Notes: Must be called with phba->hbalock held to synchronize access to * lpfc_mbuf_safety_pool. * * Returns: None **/ void __lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma) { struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool; if (pool->current_count < pool->max_count) { pool->elements[pool->current_count].virt = virt; pool->elements[pool->current_count].phys = dma; pool->current_count++; } else { pci_pool_free(phba->lpfc_mbuf_pool, virt, dma); } return; } /** * lpfc_mem_free: Free an mbuf from the lpfc_mbuf_pool PCI pool (unlocked) * @phba: HBA which owns the pool to return to * @virt: mbuf to free * @dma: the DMA-mapped address of the lpfc_mbuf_pool to be freed * * Description: Returns an mbuf lpfc_mbuf_pool to the lpfc_mbuf_safety_pool if * it is below its max_count, frees the mbuf otherwise. * * Notes: Takes phba->hbalock. Can be called with or without other locks held. * * Returns: None **/ void lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma) { unsigned long iflags; spin_lock_irqsave(&phba->hbalock, iflags); __lpfc_mbuf_free(phba, virt, dma); spin_unlock_irqrestore(&phba->hbalock, iflags); return; } /** * lpfc_els_hbq_alloc: Allocate an HBQ buffer * @phba: HBA to allocate HBQ buffer for * * Description: Allocates a DMA-mapped HBQ buffer from the lpfc_hbq_pool PCI * pool along a non-DMA-mapped container for it. * * Notes: Not interrupt-safe. Must be called with no locks held. * * Returns: * pointer to HBQ on success * NULL on failure **/ struct hbq_dmabuf * lpfc_els_hbq_alloc(struct lpfc_hba *phba) { struct hbq_dmabuf *hbqbp; hbqbp = kmalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL); if (!hbqbp) return NULL; hbqbp->dbuf.virt = pci_pool_alloc(phba->lpfc_hbq_pool, GFP_KERNEL, &hbqbp->dbuf.phys); if (!hbqbp->dbuf.virt) { kfree(hbqbp); return NULL; } hbqbp->size = LPFC_BPL_SIZE; return hbqbp; } /** * lpfc_mem_hbq_free: Frees an HBQ buffer allocated with lpfc_els_hbq_alloc * @phba: HBA buffer was allocated for * @hbqbp: HBQ container returned by lpfc_els_hbq_alloc * * Description: Frees both the container and the DMA-mapped buffer returned by * lpfc_els_hbq_alloc. * * Notes: Can be called with or without locks held. * * Returns: None **/ void lpfc_els_hbq_free(struct lpfc_hba *phba, struct hbq_dmabuf *hbqbp) { pci_pool_free(phba->lpfc_hbq_pool, hbqbp->dbuf.virt, hbqbp->dbuf.phys); kfree(hbqbp); return; } /** * lpfc_in_buf_free: Free a DMA buffer * @phba: HBA buffer is associated with * @mp: Buffer to free * * Description: Frees the given DMA buffer in the appropriate way given if the * HBA is running in SLI3 mode with HBQs enabled. * * Notes: Takes phba->hbalock. Can be called with or without other locks held. * * Returns: None **/ void lpfc_in_buf_free(struct lpfc_hba *phba, struct lpfc_dmabuf *mp) { struct hbq_dmabuf *hbq_entry; unsigned long flags; if (!mp) return; if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) { /* Check whether HBQ is still in use */ spin_lock_irqsave(&phba->hbalock, flags); if (!phba->hbq_in_use) { spin_unlock_irqrestore(&phba->hbalock, flags); return; } hbq_entry = container_of(mp, struct hbq_dmabuf, dbuf); list_del(&hbq_entry->dbuf.list); if (hbq_entry->tag == -1) { (phba->hbqs[LPFC_ELS_HBQ].hbq_free_buffer) (phba, hbq_entry); } else { lpfc_sli_free_hbq(phba, hbq_entry); } spin_unlock_irqrestore(&phba->hbalock, flags); } else { lpfc_mbuf_free(phba, mp->virt, mp->phys); kfree(mp); } return; }