534 lines
15 KiB
C
534 lines
15 KiB
C
/*******************************************************************
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* This file is part of the Emulex Linux Device Driver for *
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* Fibre Channel Host Bus Adapters. *
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* Copyright (C) 2004-2009 Emulex. All rights reserved. *
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* EMULEX and SLI are trademarks of Emulex. *
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* www.emulex.com *
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* Portions Copyright (C) 2004-2005 Christoph Hellwig *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of version 2 of the GNU General *
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* Public License as published by the Free Software Foundation. *
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* This program is distributed in the hope that it will be useful. *
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* ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND *
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* WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, *
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* FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE *
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* DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
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* TO BE LEGALLY INVALID. See the GNU General Public License for *
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* more details, a copy of which can be found in the file COPYING *
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* included with this package. *
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*******************************************************************/
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#include <linux/mempool.h>
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#include <linux/pci.h>
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#include <linux/interrupt.h>
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#include <scsi/scsi_device.h>
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#include <scsi/scsi_transport_fc.h>
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#include <scsi/scsi.h>
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#include "lpfc_hw4.h"
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#include "lpfc_hw.h"
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#include "lpfc_sli.h"
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#include "lpfc_sli4.h"
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#include "lpfc_nl.h"
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#include "lpfc_disc.h"
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#include "lpfc_scsi.h"
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#include "lpfc.h"
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#include "lpfc_crtn.h"
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#define LPFC_MBUF_POOL_SIZE 64 /* max elements in MBUF safety pool */
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#define LPFC_MEM_POOL_SIZE 64 /* max elem in non-DMA safety pool */
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/**
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* lpfc_mem_alloc - create and allocate all PCI and memory pools
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* @phba: HBA to allocate pools for
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*
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* Description: Creates and allocates PCI pools lpfc_scsi_dma_buf_pool,
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* lpfc_mbuf_pool, lpfc_hrb_pool. Creates and allocates kmalloc-backed mempools
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* for LPFC_MBOXQ_t and lpfc_nodelist. Also allocates the VPI bitmask.
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*
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* Notes: Not interrupt-safe. Must be called with no locks held. If any
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* allocation fails, frees all successfully allocated memory before returning.
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*
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* Returns:
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* 0 on success
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* -ENOMEM on failure (if any memory allocations fail)
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**/
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int
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lpfc_mem_alloc(struct lpfc_hba *phba, int align)
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{
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struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
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int longs;
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int i;
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if (phba->sli_rev == LPFC_SLI_REV4)
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phba->lpfc_scsi_dma_buf_pool =
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pci_pool_create("lpfc_scsi_dma_buf_pool",
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phba->pcidev,
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phba->cfg_sg_dma_buf_size,
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phba->cfg_sg_dma_buf_size,
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0);
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else
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phba->lpfc_scsi_dma_buf_pool =
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pci_pool_create("lpfc_scsi_dma_buf_pool",
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phba->pcidev, phba->cfg_sg_dma_buf_size,
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align, 0);
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if (!phba->lpfc_scsi_dma_buf_pool)
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goto fail;
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phba->lpfc_mbuf_pool = pci_pool_create("lpfc_mbuf_pool", phba->pcidev,
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LPFC_BPL_SIZE,
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align, 0);
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if (!phba->lpfc_mbuf_pool)
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goto fail_free_dma_buf_pool;
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pool->elements = kmalloc(sizeof(struct lpfc_dmabuf) *
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LPFC_MBUF_POOL_SIZE, GFP_KERNEL);
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if (!pool->elements)
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goto fail_free_lpfc_mbuf_pool;
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pool->max_count = 0;
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pool->current_count = 0;
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for ( i = 0; i < LPFC_MBUF_POOL_SIZE; i++) {
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pool->elements[i].virt = pci_pool_alloc(phba->lpfc_mbuf_pool,
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GFP_KERNEL, &pool->elements[i].phys);
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if (!pool->elements[i].virt)
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goto fail_free_mbuf_pool;
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pool->max_count++;
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pool->current_count++;
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}
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phba->mbox_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
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sizeof(LPFC_MBOXQ_t));
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if (!phba->mbox_mem_pool)
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goto fail_free_mbuf_pool;
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phba->nlp_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
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sizeof(struct lpfc_nodelist));
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if (!phba->nlp_mem_pool)
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goto fail_free_mbox_pool;
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if (phba->sli_rev == LPFC_SLI_REV4) {
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phba->lpfc_hrb_pool = pci_pool_create("lpfc_hrb_pool",
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phba->pcidev,
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LPFC_HDR_BUF_SIZE, align, 0);
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if (!phba->lpfc_hrb_pool)
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goto fail_free_nlp_mem_pool;
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phba->lpfc_drb_pool = pci_pool_create("lpfc_drb_pool",
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phba->pcidev,
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LPFC_DATA_BUF_SIZE, align, 0);
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if (!phba->lpfc_drb_pool)
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goto fail_free_hrb_pool;
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phba->lpfc_hbq_pool = NULL;
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} else {
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phba->lpfc_hbq_pool = pci_pool_create("lpfc_hbq_pool",
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phba->pcidev, LPFC_BPL_SIZE, align, 0);
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if (!phba->lpfc_hbq_pool)
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goto fail_free_nlp_mem_pool;
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phba->lpfc_hrb_pool = NULL;
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phba->lpfc_drb_pool = NULL;
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}
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/* vpi zero is reserved for the physical port so add 1 to max */
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longs = ((phba->max_vpi + 1) + BITS_PER_LONG - 1) / BITS_PER_LONG;
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phba->vpi_bmask = kzalloc(longs * sizeof(unsigned long), GFP_KERNEL);
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if (!phba->vpi_bmask)
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goto fail_free_dbq_pool;
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return 0;
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fail_free_dbq_pool:
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pci_pool_destroy(phba->lpfc_drb_pool);
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phba->lpfc_drb_pool = NULL;
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fail_free_hrb_pool:
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pci_pool_destroy(phba->lpfc_hrb_pool);
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phba->lpfc_hrb_pool = NULL;
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fail_free_nlp_mem_pool:
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mempool_destroy(phba->nlp_mem_pool);
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phba->nlp_mem_pool = NULL;
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fail_free_mbox_pool:
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mempool_destroy(phba->mbox_mem_pool);
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phba->mbox_mem_pool = NULL;
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fail_free_mbuf_pool:
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while (i--)
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pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
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pool->elements[i].phys);
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kfree(pool->elements);
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fail_free_lpfc_mbuf_pool:
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pci_pool_destroy(phba->lpfc_mbuf_pool);
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phba->lpfc_mbuf_pool = NULL;
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fail_free_dma_buf_pool:
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pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool);
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phba->lpfc_scsi_dma_buf_pool = NULL;
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fail:
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return -ENOMEM;
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}
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/**
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* lpfc_mem_free - Frees memory allocated by lpfc_mem_alloc
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* @phba: HBA to free memory for
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*
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* Description: Free the memory allocated by lpfc_mem_alloc routine. This
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* routine is a the counterpart of lpfc_mem_alloc.
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*
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* Returns: None
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**/
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void
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lpfc_mem_free(struct lpfc_hba *phba)
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{
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int i;
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struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
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/* Free VPI bitmask memory */
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kfree(phba->vpi_bmask);
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/* Free HBQ pools */
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lpfc_sli_hbqbuf_free_all(phba);
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if (phba->lpfc_drb_pool)
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pci_pool_destroy(phba->lpfc_drb_pool);
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phba->lpfc_drb_pool = NULL;
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if (phba->lpfc_hrb_pool)
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pci_pool_destroy(phba->lpfc_hrb_pool);
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phba->lpfc_hrb_pool = NULL;
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if (phba->lpfc_hbq_pool)
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pci_pool_destroy(phba->lpfc_hbq_pool);
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phba->lpfc_hbq_pool = NULL;
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/* Free NLP memory pool */
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mempool_destroy(phba->nlp_mem_pool);
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phba->nlp_mem_pool = NULL;
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/* Free mbox memory pool */
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mempool_destroy(phba->mbox_mem_pool);
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phba->mbox_mem_pool = NULL;
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/* Free MBUF memory pool */
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for (i = 0; i < pool->current_count; i++)
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pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
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pool->elements[i].phys);
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kfree(pool->elements);
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pci_pool_destroy(phba->lpfc_mbuf_pool);
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phba->lpfc_mbuf_pool = NULL;
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/* Free DMA buffer memory pool */
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pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool);
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phba->lpfc_scsi_dma_buf_pool = NULL;
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return;
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}
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/**
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* lpfc_mem_free_all - Frees all PCI and driver memory
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* @phba: HBA to free memory for
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*
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* Description: Free memory from PCI and driver memory pools and also those
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* used : lpfc_scsi_dma_buf_pool, lpfc_mbuf_pool, lpfc_hrb_pool. Frees
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* kmalloc-backed mempools for LPFC_MBOXQ_t and lpfc_nodelist. Also frees
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* the VPI bitmask.
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*
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* Returns: None
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**/
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void
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lpfc_mem_free_all(struct lpfc_hba *phba)
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{
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struct lpfc_sli *psli = &phba->sli;
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LPFC_MBOXQ_t *mbox, *next_mbox;
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struct lpfc_dmabuf *mp;
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/* Free memory used in mailbox queue back to mailbox memory pool */
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list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq, list) {
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mp = (struct lpfc_dmabuf *) (mbox->context1);
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if (mp) {
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lpfc_mbuf_free(phba, mp->virt, mp->phys);
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kfree(mp);
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}
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list_del(&mbox->list);
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mempool_free(mbox, phba->mbox_mem_pool);
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}
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/* Free memory used in mailbox cmpl list back to mailbox memory pool */
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list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq_cmpl, list) {
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mp = (struct lpfc_dmabuf *) (mbox->context1);
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if (mp) {
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lpfc_mbuf_free(phba, mp->virt, mp->phys);
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kfree(mp);
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}
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list_del(&mbox->list);
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mempool_free(mbox, phba->mbox_mem_pool);
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}
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/* Free the active mailbox command back to the mailbox memory pool */
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spin_lock_irq(&phba->hbalock);
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psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
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spin_unlock_irq(&phba->hbalock);
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if (psli->mbox_active) {
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mbox = psli->mbox_active;
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mp = (struct lpfc_dmabuf *) (mbox->context1);
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if (mp) {
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lpfc_mbuf_free(phba, mp->virt, mp->phys);
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kfree(mp);
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}
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mempool_free(mbox, phba->mbox_mem_pool);
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psli->mbox_active = NULL;
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}
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/* Free and destroy all the allocated memory pools */
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lpfc_mem_free(phba);
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/* Free the iocb lookup array */
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kfree(psli->iocbq_lookup);
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psli->iocbq_lookup = NULL;
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return;
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}
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/**
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* lpfc_mbuf_alloc - Allocate an mbuf from the lpfc_mbuf_pool PCI pool
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* @phba: HBA which owns the pool to allocate from
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* @mem_flags: indicates if this is a priority (MEM_PRI) allocation
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* @handle: used to return the DMA-mapped address of the mbuf
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*
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* Description: Allocates a DMA-mapped buffer from the lpfc_mbuf_pool PCI pool.
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* Allocates from generic pci_pool_alloc function first and if that fails and
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* mem_flags has MEM_PRI set (the only defined flag), returns an mbuf from the
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* HBA's pool.
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*
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* Notes: Not interrupt-safe. Must be called with no locks held. Takes
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* phba->hbalock.
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*
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* Returns:
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* pointer to the allocated mbuf on success
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* NULL on failure
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**/
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void *
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lpfc_mbuf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle)
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{
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struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
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unsigned long iflags;
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void *ret;
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ret = pci_pool_alloc(phba->lpfc_mbuf_pool, GFP_KERNEL, handle);
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spin_lock_irqsave(&phba->hbalock, iflags);
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if (!ret && (mem_flags & MEM_PRI) && pool->current_count) {
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pool->current_count--;
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ret = pool->elements[pool->current_count].virt;
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*handle = pool->elements[pool->current_count].phys;
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}
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spin_unlock_irqrestore(&phba->hbalock, iflags);
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return ret;
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}
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/**
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* __lpfc_mbuf_free - Free an mbuf from the lpfc_mbuf_pool PCI pool (locked)
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* @phba: HBA which owns the pool to return to
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* @virt: mbuf to free
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* @dma: the DMA-mapped address of the lpfc_mbuf_pool to be freed
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*
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* Description: Returns an mbuf lpfc_mbuf_pool to the lpfc_mbuf_safety_pool if
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* it is below its max_count, frees the mbuf otherwise.
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*
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* Notes: Must be called with phba->hbalock held to synchronize access to
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* lpfc_mbuf_safety_pool.
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*
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* Returns: None
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**/
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void
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__lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
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{
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struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
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if (pool->current_count < pool->max_count) {
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pool->elements[pool->current_count].virt = virt;
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pool->elements[pool->current_count].phys = dma;
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pool->current_count++;
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} else {
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pci_pool_free(phba->lpfc_mbuf_pool, virt, dma);
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}
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return;
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}
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/**
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* lpfc_mbuf_free - Free an mbuf from the lpfc_mbuf_pool PCI pool (unlocked)
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* @phba: HBA which owns the pool to return to
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* @virt: mbuf to free
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* @dma: the DMA-mapped address of the lpfc_mbuf_pool to be freed
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*
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* Description: Returns an mbuf lpfc_mbuf_pool to the lpfc_mbuf_safety_pool if
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* it is below its max_count, frees the mbuf otherwise.
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*
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* Notes: Takes phba->hbalock. Can be called with or without other locks held.
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*
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* Returns: None
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**/
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void
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lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
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{
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unsigned long iflags;
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spin_lock_irqsave(&phba->hbalock, iflags);
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__lpfc_mbuf_free(phba, virt, dma);
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spin_unlock_irqrestore(&phba->hbalock, iflags);
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return;
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}
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/**
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* lpfc_els_hbq_alloc - Allocate an HBQ buffer
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* @phba: HBA to allocate HBQ buffer for
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*
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* Description: Allocates a DMA-mapped HBQ buffer from the lpfc_hrb_pool PCI
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* pool along a non-DMA-mapped container for it.
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*
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* Notes: Not interrupt-safe. Must be called with no locks held.
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*
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* Returns:
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* pointer to HBQ on success
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* NULL on failure
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**/
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struct hbq_dmabuf *
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lpfc_els_hbq_alloc(struct lpfc_hba *phba)
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{
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struct hbq_dmabuf *hbqbp;
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hbqbp = kmalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL);
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if (!hbqbp)
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return NULL;
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hbqbp->dbuf.virt = pci_pool_alloc(phba->lpfc_hbq_pool, GFP_KERNEL,
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&hbqbp->dbuf.phys);
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if (!hbqbp->dbuf.virt) {
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kfree(hbqbp);
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return NULL;
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}
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hbqbp->size = LPFC_BPL_SIZE;
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return hbqbp;
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}
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/**
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* lpfc_els_hbq_free - Frees an HBQ buffer allocated with lpfc_els_hbq_alloc
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* @phba: HBA buffer was allocated for
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* @hbqbp: HBQ container returned by lpfc_els_hbq_alloc
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*
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* Description: Frees both the container and the DMA-mapped buffer returned by
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* lpfc_els_hbq_alloc.
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*
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* Notes: Can be called with or without locks held.
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*
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* Returns: None
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**/
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void
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lpfc_els_hbq_free(struct lpfc_hba *phba, struct hbq_dmabuf *hbqbp)
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{
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pci_pool_free(phba->lpfc_hbq_pool, hbqbp->dbuf.virt, hbqbp->dbuf.phys);
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kfree(hbqbp);
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return;
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}
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/**
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* lpfc_sli4_rb_alloc - Allocate an SLI4 Receive buffer
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* @phba: HBA to allocate a receive buffer for
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*
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* Description: Allocates a DMA-mapped receive buffer from the lpfc_hrb_pool PCI
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* pool along a non-DMA-mapped container for it.
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*
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* Notes: Not interrupt-safe. Must be called with no locks held.
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*
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* Returns:
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* pointer to HBQ on success
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* NULL on failure
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**/
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struct hbq_dmabuf *
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lpfc_sli4_rb_alloc(struct lpfc_hba *phba)
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{
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struct hbq_dmabuf *dma_buf;
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dma_buf = kmalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL);
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if (!dma_buf)
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return NULL;
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dma_buf->hbuf.virt = pci_pool_alloc(phba->lpfc_hrb_pool, GFP_KERNEL,
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&dma_buf->hbuf.phys);
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if (!dma_buf->hbuf.virt) {
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kfree(dma_buf);
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return NULL;
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}
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dma_buf->dbuf.virt = pci_pool_alloc(phba->lpfc_drb_pool, GFP_KERNEL,
|
|
&dma_buf->dbuf.phys);
|
|
if (!dma_buf->dbuf.virt) {
|
|
pci_pool_free(phba->lpfc_hrb_pool, dma_buf->hbuf.virt,
|
|
dma_buf->hbuf.phys);
|
|
kfree(dma_buf);
|
|
return NULL;
|
|
}
|
|
dma_buf->size = LPFC_BPL_SIZE;
|
|
return dma_buf;
|
|
}
|
|
|
|
/**
|
|
* lpfc_sli4_rb_free - Frees a receive buffer
|
|
* @phba: HBA buffer was allocated for
|
|
* @dmab: DMA Buffer container returned by lpfc_sli4_hbq_alloc
|
|
*
|
|
* Description: Frees both the container and the DMA-mapped buffers returned by
|
|
* lpfc_sli4_rb_alloc.
|
|
*
|
|
* Notes: Can be called with or without locks held.
|
|
*
|
|
* Returns: None
|
|
**/
|
|
void
|
|
lpfc_sli4_rb_free(struct lpfc_hba *phba, struct hbq_dmabuf *dmab)
|
|
{
|
|
pci_pool_free(phba->lpfc_hrb_pool, dmab->hbuf.virt, dmab->hbuf.phys);
|
|
pci_pool_free(phba->lpfc_drb_pool, dmab->dbuf.virt, dmab->dbuf.phys);
|
|
kfree(dmab);
|
|
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;
|
|
}
|