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| author | Shannon Nelson <shannon.nelson@intel.com> | 2007-10-16 01:27:42 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-16 09:43:09 -0700 |
| commit | 2ed6dc34f9ed39bb8e4c81ea1056f0ba56315841 (patch) | |
| tree | e3f6ca7961f9c4e34453d06e584c0bc98ec630d7 /drivers/dma/ioat.c | |
| parent | 7589670f37736bcc119ebfbd69aafea6d585d1d4 (diff) | |
| download | op-kernel-dev-2ed6dc34f9ed39bb8e4c81ea1056f0ba56315841.zip op-kernel-dev-2ed6dc34f9ed39bb8e4c81ea1056f0ba56315841.tar.gz | |
I/OAT: Add DCA services
Add code to connect to the DCA driver and provide cpu tags for use by
drivers that would like to use Direct Cache Access hints.
[Adrian Bunk] Several Kconfig cleanup items
[Andrew Morten, Chris Leech] Fix for using cpu_physical_id() even when
built for uni-processor
Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/dma/ioat.c')
| -rw-r--r-- | drivers/dma/ioat.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/drivers/dma/ioat.c b/drivers/dma/ioat.c index ae5817b..f7276bf 100644 --- a/drivers/dma/ioat.c +++ b/drivers/dma/ioat.c @@ -1,6 +1,6 @@ /* * Intel I/OAT DMA Linux driver - * Copyright(c) 2004 - 2007 Intel Corporation. + * Copyright(c) 2007 Intel Corporation. * * This program is free software; you can redistribute it and/or modify it * under the terms and conditions of the GNU General Public License, @@ -29,6 +29,7 @@ #include <linux/module.h> #include <linux/pci.h> #include <linux/interrupt.h> +#include <linux/dca.h> #include "ioatdma.h" #include "ioatdma_registers.h" #include "ioatdma_hw.h" @@ -49,6 +50,7 @@ struct ioat_device { struct pci_dev *pdev; void __iomem *iobase; struct ioatdma_device *dma; + struct dca_provider *dca; }; static int __devinit ioat_probe(struct pci_dev *pdev, @@ -57,6 +59,10 @@ static int __devinit ioat_probe(struct pci_dev *pdev, static void __devexit ioat_remove(struct pci_dev *pdev); #endif +static int ioat_dca_enabled = 1; +module_param(ioat_dca_enabled, int, 0644); +MODULE_PARM_DESC(ioat_dca_enabled, "control support of dca service (default: 1)"); + static int ioat_setup_functionality(struct pci_dev *pdev, void __iomem *iobase) { struct ioat_device *device = pci_get_drvdata(pdev); @@ -67,6 +73,8 @@ static int ioat_setup_functionality(struct pci_dev *pdev, void __iomem *iobase) switch (version) { case IOAT_VER_1_2: device->dma = ioat_dma_probe(pdev, iobase); + if (ioat_dca_enabled) + device->dca = ioat_dca_init(pdev, iobase); break; default: err = -ENODEV; @@ -83,6 +91,13 @@ static void ioat_shutdown_functionality(struct pci_dev *pdev) ioat_dma_remove(device->dma); device->dma = NULL; } + + if (device->dca) { + unregister_dca_provider(device->dca); + free_dca_provider(device->dca); + device->dca = NULL; + } + } static struct pci_driver ioat_pci_drv = { |
