--- /dev/null
+/*******************************************************************
+ * 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;
+}
Code Review / kvmfornfv.git / blobdiff