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Diffstat (limited to '')
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_mem.c | 771 |
1 files changed, 771 insertions, 0 deletions
diff --git a/drivers/scsi/lpfc/lpfc_mem.c b/drivers/scsi/lpfc/lpfc_mem.c new file mode 100644 index 000000000..fa758f9b8 --- /dev/null +++ b/drivers/scsi/lpfc/lpfc_mem.c @@ -0,0 +1,771 @@ +/******************************************************************* + * This file is part of the Emulex Linux Device Driver for * + * Fibre Channel Host Bus Adapters. * + * Copyright (C) 2017-2018 Broadcom. All Rights Reserved. The term * + * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries. * + * Copyright (C) 2004-2014 Emulex. All rights reserved. * + * EMULEX and SLI are trademarks of Emulex. * + * www.broadcom.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.h> +#include <scsi/scsi_device.h> +#include <scsi/scsi_transport_fc.h> +#include <scsi/fc/fc_fs.h> + +#include <linux/nvme-fc-driver.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.h" +#include "lpfc_scsi.h" +#include "lpfc_nvme.h" +#include "lpfc_nvmet.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_sg_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_sg_dma_buf_pool = + dma_pool_create("lpfc_sg_dma_buf_pool", + &phba->pcidev->dev, + phba->cfg_sg_dma_buf_size, + i, 0); + if (!phba->lpfc_sg_dma_buf_pool) + goto fail; + + } else { + phba->lpfc_sg_dma_buf_pool = + dma_pool_create("lpfc_sg_dma_buf_pool", + &phba->pcidev->dev, phba->cfg_sg_dma_buf_size, + align, 0); + + if (!phba->lpfc_sg_dma_buf_pool) + goto fail; + } + + phba->lpfc_mbuf_pool = dma_pool_create("lpfc_mbuf_pool", &phba->pcidev->dev, + LPFC_BPL_SIZE, + align, 0); + if (!phba->lpfc_mbuf_pool) + goto fail_free_dma_buf_pool; + + pool->elements = kmalloc_array(LPFC_MBUF_POOL_SIZE, + sizeof(struct lpfc_dmabuf), + 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 = dma_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 = dma_pool_create("lpfc_hrb_pool", + &phba->pcidev->dev, + LPFC_HDR_BUF_SIZE, align, 0); + if (!phba->lpfc_hrb_pool) + goto fail_free_rrq_mem_pool; + + phba->lpfc_drb_pool = dma_pool_create("lpfc_drb_pool", + &phba->pcidev->dev, + 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 = dma_pool_create("lpfc_hbq_pool", + &phba->pcidev->dev, 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_drb_pool; + } else { + phba->device_data_mem_pool = NULL; + } + + return 0; +fail_free_drb_pool: + dma_pool_destroy(phba->lpfc_drb_pool); + phba->lpfc_drb_pool = NULL; + fail_free_hrb_pool: + dma_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--) + dma_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt, + pool->elements[i].phys); + kfree(pool->elements); + fail_free_lpfc_mbuf_pool: + dma_pool_destroy(phba->lpfc_mbuf_pool); + phba->lpfc_mbuf_pool = NULL; + fail_free_dma_buf_pool: + dma_pool_destroy(phba->lpfc_sg_dma_buf_pool); + phba->lpfc_sg_dma_buf_pool = NULL; + fail: + return -ENOMEM; +} + +int +lpfc_nvmet_mem_alloc(struct lpfc_hba *phba) +{ + phba->lpfc_nvmet_drb_pool = + dma_pool_create("lpfc_nvmet_drb_pool", + &phba->pcidev->dev, LPFC_NVMET_DATA_BUF_SIZE, + SGL_ALIGN_SZ, 0); + if (!phba->lpfc_nvmet_drb_pool) { + lpfc_printf_log(phba, KERN_ERR, LOG_INIT, + "6024 Can't enable NVME Target - no memory\n"); + return -ENOMEM; + } + return 0; +} + +/** + * 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_nvmet_drb_pool) + dma_pool_destroy(phba->lpfc_nvmet_drb_pool); + phba->lpfc_nvmet_drb_pool = NULL; + if (phba->lpfc_drb_pool) + dma_pool_destroy(phba->lpfc_drb_pool); + phba->lpfc_drb_pool = NULL; + if (phba->lpfc_hrb_pool) + dma_pool_destroy(phba->lpfc_hrb_pool); + phba->lpfc_hrb_pool = NULL; + if (phba->txrdy_payload_pool) + dma_pool_destroy(phba->txrdy_payload_pool); + phba->txrdy_payload_pool = NULL; + + if (phba->lpfc_hbq_pool) + dma_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++) + dma_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt, + pool->elements[i].phys); + kfree(pool->elements); + + dma_pool_destroy(phba->lpfc_mbuf_pool); + phba->lpfc_mbuf_pool = NULL; + + /* Free DMA buffer memory pool */ + dma_pool_destroy(phba->lpfc_sg_dma_buf_pool); + phba->lpfc_sg_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_sg_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 dma_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 = dma_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 { + dma_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_nvmet_buf_alloc - Allocate an nvmet_buf from the + * lpfc_sg_dma_buf_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 nvmet_buf + * + * Description: Allocates a DMA-mapped buffer from the lpfc_sg_dma_buf_pool + * PCI pool. Allocates from generic dma_pool_alloc function. + * + * Returns: + * pointer to the allocated nvmet_buf on success + * NULL on failure + **/ +void * +lpfc_nvmet_buf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle) +{ + void *ret; + + ret = dma_pool_alloc(phba->lpfc_sg_dma_buf_pool, GFP_KERNEL, handle); + return ret; +} + +/** + * lpfc_nvmet_buf_free - Free an nvmet_buf from the lpfc_sg_dma_buf_pool + * PCI pool + * @phba: HBA which owns the pool to return to + * @virt: nvmet_buf to free + * @dma: the DMA-mapped address of the lpfc_sg_dma_buf_pool to be freed + * + * Returns: None + **/ +void +lpfc_nvmet_buf_free(struct lpfc_hba *phba, void *virt, dma_addr_t dma) +{ + dma_pool_free(phba->lpfc_sg_dma_buf_pool, virt, dma); +} + +/** + * 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 = dma_pool_alloc(phba->lpfc_hbq_pool, GFP_KERNEL, + &hbqbp->dbuf.phys); + if (!hbqbp->dbuf.virt) { + kfree(hbqbp); + return NULL; + } + hbqbp->total_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) +{ + dma_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. + * + * 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 = dma_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 = dma_pool_alloc(phba->lpfc_drb_pool, GFP_KERNEL, + &dma_buf->dbuf.phys); + if (!dma_buf->dbuf.virt) { + dma_pool_free(phba->lpfc_hrb_pool, dma_buf->hbuf.virt, + dma_buf->hbuf.phys); + kfree(dma_buf); + return NULL; + } + dma_buf->total_size = LPFC_DATA_BUF_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) +{ + dma_pool_free(phba->lpfc_hrb_pool, dmab->hbuf.virt, dmab->hbuf.phys); + dma_pool_free(phba->lpfc_drb_pool, dmab->dbuf.virt, dmab->dbuf.phys); + kfree(dmab); +} + +/** + * lpfc_sli4_nvmet_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 rqb_dmabuf * +lpfc_sli4_nvmet_alloc(struct lpfc_hba *phba) +{ + struct rqb_dmabuf *dma_buf; + + dma_buf = kzalloc(sizeof(*dma_buf), GFP_KERNEL); + if (!dma_buf) + return NULL; + + dma_buf->hbuf.virt = dma_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 = dma_pool_alloc(phba->lpfc_nvmet_drb_pool, + GFP_KERNEL, &dma_buf->dbuf.phys); + if (!dma_buf->dbuf.virt) { + dma_pool_free(phba->lpfc_hrb_pool, dma_buf->hbuf.virt, + dma_buf->hbuf.phys); + kfree(dma_buf); + return NULL; + } + dma_buf->total_size = LPFC_NVMET_DATA_BUF_SIZE; + return dma_buf; +} + +/** + * lpfc_sli4_nvmet_free - Frees a receive buffer + * @phba: HBA buffer was allocated for + * @dmab: DMA Buffer container returned by lpfc_sli4_rbq_alloc + * + * Description: Frees both the container and the DMA-mapped buffers returned by + * lpfc_sli4_nvmet_alloc. + * + * Notes: Can be called with or without locks held. + * + * Returns: None + **/ +void +lpfc_sli4_nvmet_free(struct lpfc_hba *phba, struct rqb_dmabuf *dmab) +{ + dma_pool_free(phba->lpfc_hrb_pool, dmab->hbuf.virt, dmab->hbuf.phys); + dma_pool_free(phba->lpfc_nvmet_drb_pool, + dmab->dbuf.virt, dmab->dbuf.phys); + kfree(dmab); +} + +/** + * 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) { + hbq_entry = container_of(mp, struct hbq_dmabuf, dbuf); + /* 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; + } + 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; +} + +/** + * lpfc_rq_buf_free - Free a RQ DMA buffer + * @phba: HBA buffer is associated with + * @mp: Buffer to free + * + * Description: Frees the given DMA buffer in the appropriate way given by + * reposting it to its associated RQ so it can be reused. + * + * Notes: Takes phba->hbalock. Can be called with or without other locks held. + * + * Returns: None + **/ +void +lpfc_rq_buf_free(struct lpfc_hba *phba, struct lpfc_dmabuf *mp) +{ + struct lpfc_rqb *rqbp; + struct lpfc_rqe hrqe; + struct lpfc_rqe drqe; + struct rqb_dmabuf *rqb_entry; + unsigned long flags; + int rc; + + if (!mp) + return; + + rqb_entry = container_of(mp, struct rqb_dmabuf, hbuf); + rqbp = rqb_entry->hrq->rqbp; + + spin_lock_irqsave(&phba->hbalock, flags); + list_del(&rqb_entry->hbuf.list); + hrqe.address_lo = putPaddrLow(rqb_entry->hbuf.phys); + hrqe.address_hi = putPaddrHigh(rqb_entry->hbuf.phys); + drqe.address_lo = putPaddrLow(rqb_entry->dbuf.phys); + drqe.address_hi = putPaddrHigh(rqb_entry->dbuf.phys); + rc = lpfc_sli4_rq_put(rqb_entry->hrq, rqb_entry->drq, &hrqe, &drqe); + if (rc < 0) { + lpfc_printf_log(phba, KERN_ERR, LOG_INIT, + "6409 Cannot post to HRQ %d: %x %x %x " + "DRQ %x %x\n", + rqb_entry->hrq->queue_id, + rqb_entry->hrq->host_index, + rqb_entry->hrq->hba_index, + rqb_entry->hrq->entry_count, + rqb_entry->drq->host_index, + rqb_entry->drq->hba_index); + (rqbp->rqb_free_buffer)(phba, rqb_entry); + } else { + list_add_tail(&rqb_entry->hbuf.list, &rqbp->rqb_buffer_list); + rqbp->buffer_count++; + } + + spin_unlock_irqrestore(&phba->hbalock, flags); +} |