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- /*******************************************************************
- * This file is part of the Emulex Linux Device Driver for *
- * Fibre Channel Host Bus Adapters. *
- * Copyright (C) 2004-2014 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/slab.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_hw4.h"
- #include "lpfc_hw.h"
- #include "lpfc_sli.h"
- #include "lpfc_sli4.h"
- #include "lpfc_nl.h"
- #include "lpfc_disc.h"
- #include "lpfc_scsi.h"
- #include "lpfc.h"
- #include "lpfc_crtn.h"
- #include "lpfc_logmsg.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 */
- #define LPFC_DEVICE_DATA_POOL_SIZE 64 /* max elements in device data pool */
- int
- lpfc_mem_alloc_active_rrq_pool_s4(struct lpfc_hba *phba) {
- size_t bytes;
- int max_xri = phba->sli4_hba.max_cfg_param.max_xri;
- if (max_xri <= 0)
- return -ENOMEM;
- bytes = ((BITS_PER_LONG - 1 + max_xri) / BITS_PER_LONG) *
- sizeof(unsigned long);
- phba->cfg_rrq_xri_bitmap_sz = bytes;
- phba->active_rrq_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
- bytes);
- if (!phba->active_rrq_pool)
- return -ENOMEM;
- else
- return 0;
- }
- /**
- * 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_hrb_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, int align)
- {
- struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
- int i;
- if (phba->sli_rev == LPFC_SLI_REV4) {
- /* Calculate alignment */
- if (phba->cfg_sg_dma_buf_size < SLI4_PAGE_SIZE)
- i = phba->cfg_sg_dma_buf_size;
- else
- i = SLI4_PAGE_SIZE;
- phba->lpfc_scsi_dma_buf_pool =
- pci_pool_create("lpfc_scsi_dma_buf_pool",
- phba->pcidev,
- phba->cfg_sg_dma_buf_size,
- i,
- 0);
- } else {
- phba->lpfc_scsi_dma_buf_pool =
- pci_pool_create("lpfc_scsi_dma_buf_pool",
- phba->pcidev, phba->cfg_sg_dma_buf_size,
- align, 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,
- align, 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;
- if (phba->sli_rev == LPFC_SLI_REV4) {
- phba->rrq_pool =
- mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
- sizeof(struct lpfc_node_rrq));
- if (!phba->rrq_pool)
- goto fail_free_nlp_mem_pool;
- phba->lpfc_hrb_pool = pci_pool_create("lpfc_hrb_pool",
- phba->pcidev,
- LPFC_HDR_BUF_SIZE, align, 0);
- if (!phba->lpfc_hrb_pool)
- goto fail_free_rrq_mem_pool;
- phba->lpfc_drb_pool = pci_pool_create("lpfc_drb_pool",
- phba->pcidev,
- LPFC_DATA_BUF_SIZE, align, 0);
- if (!phba->lpfc_drb_pool)
- goto fail_free_hrb_pool;
- phba->lpfc_hbq_pool = NULL;
- } else {
- phba->lpfc_hbq_pool = pci_pool_create("lpfc_hbq_pool",
- phba->pcidev, LPFC_BPL_SIZE, align, 0);
- if (!phba->lpfc_hbq_pool)
- goto fail_free_nlp_mem_pool;
- phba->lpfc_hrb_pool = NULL;
- phba->lpfc_drb_pool = NULL;
- }
- if (phba->cfg_EnableXLane) {
- phba->device_data_mem_pool = mempool_create_kmalloc_pool(
- LPFC_DEVICE_DATA_POOL_SIZE,
- sizeof(struct lpfc_device_data));
- if (!phba->device_data_mem_pool)
- goto fail_free_hrb_pool;
- } else {
- phba->device_data_mem_pool = NULL;
- }
- return 0;
- fail_free_hrb_pool:
- pci_pool_destroy(phba->lpfc_hrb_pool);
- phba->lpfc_hrb_pool = NULL;
- fail_free_rrq_mem_pool:
- mempool_destroy(phba->rrq_pool);
- phba->rrq_pool = NULL;
- 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 memory allocated by lpfc_mem_alloc
- * @phba: HBA to free memory for
- *
- * Description: Free the memory allocated by lpfc_mem_alloc routine. This
- * routine is a the counterpart of lpfc_mem_alloc.
- *
- * Returns: None
- **/
- void
- lpfc_mem_free(struct lpfc_hba *phba)
- {
- int i;
- struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
- struct lpfc_device_data *device_data;
- /* Free HBQ pools */
- lpfc_sli_hbqbuf_free_all(phba);
- if (phba->lpfc_drb_pool)
- pci_pool_destroy(phba->lpfc_drb_pool);
- phba->lpfc_drb_pool = NULL;
- if (phba->lpfc_hrb_pool)
- pci_pool_destroy(phba->lpfc_hrb_pool);
- phba->lpfc_hrb_pool = NULL;
- if (phba->lpfc_hbq_pool)
- pci_pool_destroy(phba->lpfc_hbq_pool);
- phba->lpfc_hbq_pool = NULL;
- if (phba->rrq_pool)
- mempool_destroy(phba->rrq_pool);
- phba->rrq_pool = NULL;
- /* Free NLP memory pool */
- mempool_destroy(phba->nlp_mem_pool);
- phba->nlp_mem_pool = NULL;
- if (phba->sli_rev == LPFC_SLI_REV4 && phba->active_rrq_pool) {
- mempool_destroy(phba->active_rrq_pool);
- phba->active_rrq_pool = NULL;
- }
- /* Free mbox memory pool */
- mempool_destroy(phba->mbox_mem_pool);
- phba->mbox_mem_pool = NULL;
- /* Free MBUF memory pool */
- 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_mbuf_pool);
- phba->lpfc_mbuf_pool = NULL;
- /* Free DMA buffer memory pool */
- pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool);
- phba->lpfc_scsi_dma_buf_pool = NULL;
- /* Free Device Data memory pool */
- if (phba->device_data_mem_pool) {
- /* Ensure all objects have been returned to the pool */
- while (!list_empty(&phba->luns)) {
- device_data = list_first_entry(&phba->luns,
- struct lpfc_device_data,
- listentry);
- list_del(&device_data->listentry);
- mempool_free(device_data, phba->device_data_mem_pool);
- }
- mempool_destroy(phba->device_data_mem_pool);
- }
- phba->device_data_mem_pool = NULL;
- return;
- }
- /**
- * lpfc_mem_free_all - Frees all PCI and driver memory
- * @phba: HBA to free memory for
- *
- * Description: Free memory from PCI and driver memory pools and also those
- * used : lpfc_scsi_dma_buf_pool, lpfc_mbuf_pool, lpfc_hrb_pool. Frees
- * kmalloc-backed mempools for LPFC_MBOXQ_t and lpfc_nodelist. Also frees
- * the VPI bitmask.
- *
- * Returns: None
- **/
- void
- lpfc_mem_free_all(struct lpfc_hba *phba)
- {
- struct lpfc_sli *psli = &phba->sli;
- LPFC_MBOXQ_t *mbox, *next_mbox;
- struct lpfc_dmabuf *mp;
- /* Free memory used in mailbox queue back to mailbox memory pool */
- 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);
- }
- /* Free memory used in mailbox cmpl list back to mailbox memory 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);
- }
- /* Free the active mailbox command back to the mailbox memory pool */
- spin_lock_irq(&phba->hbalock);
- psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
- spin_unlock_irq(&phba->hbalock);
- 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;
- }
- /* Free and destroy all the allocated memory pools */
- lpfc_mem_free(phba);
- /* Free the iocb lookup array */
- kfree(psli->iocbq_lookup);
- psli->iocbq_lookup = NULL;
- return;
- }
- /**
- * 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_mbuf_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_mbuf_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_hrb_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 = kzalloc(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_els_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_sli4_rb_alloc - Allocate an SLI4 Receive buffer
- * @phba: HBA to allocate a receive buffer for
- *
- * Description: Allocates a DMA-mapped receive buffer from the lpfc_hrb_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_sli4_rb_alloc(struct lpfc_hba *phba)
- {
- struct hbq_dmabuf *dma_buf;
- dma_buf = kzalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL);
- if (!dma_buf)
- return NULL;
- dma_buf->hbuf.virt = pci_pool_alloc(phba->lpfc_hrb_pool, GFP_KERNEL,
- &dma_buf->hbuf.phys);
- if (!dma_buf->hbuf.virt) {
- kfree(dma_buf);
- return NULL;
- }
- 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;
- }
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