![Tejun Heo](/assets/img/avatar_default.png)
percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
535 lines
15 KiB
C
535 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/slab.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,
|
|
&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 = kmalloc(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;
|
|
}
|