diff options
| -rw-r--r-- | Documentation/mic/mic_overview.txt | 54 | ||||
| -rwxr-xr-x | Documentation/mic/mpssd/mpss | 2 | ||||
| -rw-r--r-- | Documentation/mic/mpssd/mpssd.c | 2 | ||||
| -rw-r--r-- | drivers/misc/mic/Kconfig | 7 | ||||
| -rw-r--r-- | drivers/misc/mic/card/mic_device.c | 84 | ||||
| -rw-r--r-- | drivers/misc/mic/card/mic_device.h | 3 | ||||
| -rw-r--r-- | drivers/misc/mic/card/mic_x100.c | 1 | ||||
| -rw-r--r-- | drivers/misc/mic/host/mic_boot.c | 123 | ||||
| -rw-r--r-- | drivers/misc/mic/host/mic_device.h | 3 | ||||
| -rw-r--r-- | drivers/misc/mic/host/mic_main.c | 1 |
10 files changed, 247 insertions, 33 deletions
diff --git a/Documentation/mic/mic_overview.txt b/Documentation/mic/mic_overview.txt index 73f44fc3e715..074adbdf83a4 100644 --- a/Documentation/mic/mic_overview.txt +++ b/Documentation/mic/mic_overview.txt @@ -12,10 +12,19 @@ for the X100 devices. Since it is a PCIe card, it does not have the ability to host hardware devices for networking, storage and console. We provide these devices -on X100 coprocessors thus enabling a self-bootable equivalent environment -for applications. A key benefit of our solution is that it leverages -the standard virtio framework for network, disk and console devices, -though in our case the virtio framework is used across a PCIe bus. +on X100 coprocessors thus enabling a self-bootable equivalent +environment for applications. A key benefit of our solution is that it +leverages the standard virtio framework for network, disk and console +devices, though in our case the virtio framework is used across a PCIe +bus. A Virtio Over PCIe (VOP) driver allows creating user space +backends or devices on the host which are used to probe virtio drivers +for these devices on the MIC card. The existing VRINGH infrastructure +in the kernel is used to access virtio rings from the host. The card +VOP driver allows card virtio drivers to communicate with their user +space backends on the host via a device page. Ring 3 apps on the host +can add, remove and configure virtio devices. A thin MIC specific +virtio_config_ops is implemented which is borrowed heavily from +previous similar implementations in lguest and s390. MIC PCIe card has a dma controller with 8 channels. These channels are shared between the host s/w and the card s/w. 0 to 3 are used by host @@ -38,7 +47,6 @@ single threaded performance for the host compared to MIC, the ability of the host to initiate DMA's to/from the card using the MIC DMA engine and the fact that the virtio block storage backend can only be on the host. - | +----------+ | +----------+ | Card OS | | | Host OS | +----------+ | +----------+ @@ -47,27 +55,25 @@ the fact that the virtio block storage backend can only be on the host. | Virtio| |Virtio | |Virtio| | |Virtio | |Virtio | |Virtio | | Net | |Console | |Block | | |Net | |Console | |Block | | Driver| |Driver | |Driver| | |backend | |backend | |backend | - +-------+ +--------+ +------+ | +---------+ +--------+ +--------+ + +---+---+ +---+----+ +--+---+ | +---------+ +----+---+ +--------+ | | | | | | | | | | |User | | | - | | | |------|------------|---------|------- - +-------------------+ |Kernel +--------------------------+ - | | | Virtio over PCIe IOCTLs | - | | +--------------------------+ -+-----------+ | | | +-----------+ -| MIC DMA | | +------+ | +------+ +------+ | | MIC DMA | -| Driver | | | SCIF | | | SCIF | | COSM | | | Driver | -+-----------+ | +------+ | +------+ +--+---+ | +-----------+ - | | | | | | | | -+---------------+ | +------+ | +--+---+ +--+---+ | +----------------+ -|MIC virtual Bus| | |SCIF | | |SCIF | | COSM | | |MIC virtual Bus | -+---------------+ | |HW Bus| | |HW Bus| | Bus | | +----------------+ - | | +------+ | +--+---+ +------+ | | - | | | | | | | | - | +-----------+---+ | | | +---------------+ | - | |Intel MIC | | | | |Intel MIC | | - +---|Card Driver | | | | |Host Driver | | - +------------+--------+ | +----+---------------+-----+ + | | | |------|------------|--+------|------- + +---------+---------+ |Kernel | + | | | + +---------+ +---+----+ +------+ | +------+ +------+ +--+---+ +-------+ + |MIC DMA | | VOP | | SCIF | | | SCIF | | COSM | | VOP | |MIC DMA| + +---+-----+ +---+----+ +--+---+ | +--+---+ +--+---+ +------+ +----+--+ + | | | | | | | + +---+-----+ +---+----+ +--+---+ | +--+---+ +--+---+ +------+ +----+--+ + |MIC | | VOP | |SCIF | | |SCIF | | COSM | | VOP | | MIC | + |HW Bus | | HW Bus| |HW Bus| | |HW Bus| | Bus | |HW Bus| |HW Bus | + +---------+ +--------+ +--+---+ | +--+---+ +------+ +------+ +-------+ + | | | | | | | + | +-----------+--+ | | | +---------------+ | + | |Intel MIC | | | | |Intel MIC | | + | |Card Driver | | | | |Host Driver | | + +---+--------------+------+ | +----+---------------+-----+ | | | +-------------------------------------------------------------+ | | diff --git a/Documentation/mic/mpssd/mpss b/Documentation/mic/mpssd/mpss index 09ea90931649..5fcf9fa4b082 100755 --- a/Documentation/mic/mpssd/mpss +++ b/Documentation/mic/mpssd/mpss @@ -35,7 +35,7 @@ exec=/usr/sbin/mpssd sysfs="/sys/class/mic" -mic_modules="mic_host mic_x100_dma scif" +mic_modules="mic_host mic_x100_dma scif vop" start() { diff --git a/Documentation/mic/mpssd/mpssd.c b/Documentation/mic/mpssd/mpssd.c index aaeafa18d99b..518dece71578 100644 --- a/Documentation/mic/mpssd/mpssd.c +++ b/Documentation/mic/mpssd/mpssd.c @@ -926,7 +926,7 @@ add_virtio_device(struct mic_info *mic, struct mic_device_desc *dd) char path[PATH_MAX]; int fd, err; - snprintf(path, PATH_MAX, "/dev/mic%d", mic->id); + snprintf(path, PATH_MAX, "/dev/vop_virtio%d", mic->id); fd = open(path, O_RDWR); if (fd < 0) { mpsslog("Could not open %s %s\n", path, strerror(errno)); diff --git a/drivers/misc/mic/Kconfig b/drivers/misc/mic/Kconfig index b03bb17cae77..2e4f3ba75c8e 100644 --- a/drivers/misc/mic/Kconfig +++ b/drivers/misc/mic/Kconfig @@ -53,8 +53,8 @@ comment "Intel MIC Host Driver" config INTEL_MIC_HOST tristate "Intel MIC Host Driver" - depends on 64BIT && PCI && X86 && INTEL_MIC_BUS && SCIF_BUS && MIC_COSM - select VHOST_RING + depends on 64BIT && PCI && X86 + depends on INTEL_MIC_BUS && SCIF_BUS && MIC_COSM && VOP_BUS help This enables Host Driver support for the Intel Many Integrated Core (MIC) family of PCIe form factor coprocessor devices that @@ -73,7 +73,8 @@ comment "Intel MIC Card Driver" config INTEL_MIC_CARD tristate "Intel MIC Card Driver" - depends on 64BIT && X86 && INTEL_MIC_BUS && SCIF_BUS && MIC_COSM + depends on 64BIT && X86 + depends on INTEL_MIC_BUS && SCIF_BUS && MIC_COSM && VOP_BUS select VIRTIO help This enables card driver support for the Intel Many Integrated diff --git a/drivers/misc/mic/card/mic_device.c b/drivers/misc/mic/card/mic_device.c index ff03c633541c..e749af48f736 100644 --- a/drivers/misc/mic/card/mic_device.c +++ b/drivers/misc/mic/card/mic_device.c @@ -249,12 +249,82 @@ static struct scif_hw_ops scif_hw_ops = { .iounmap = ___mic_iounmap, }; +static inline struct mic_driver *vpdev_to_mdrv(struct vop_device *vpdev) +{ + return dev_get_drvdata(vpdev->dev.parent); +} + +static struct mic_irq * +__mic_request_irq(struct vop_device *vpdev, + irqreturn_t (*func)(int irq, void *data), + const char *name, void *data, int intr_src) +{ + return mic_request_card_irq(func, NULL, name, data, intr_src); +} + +static void __mic_free_irq(struct vop_device *vpdev, + struct mic_irq *cookie, void *data) +{ + return mic_free_card_irq(cookie, data); +} + +static void __mic_ack_interrupt(struct vop_device *vpdev, int num) +{ + struct mic_driver *mdrv = vpdev_to_mdrv(vpdev); + + mic_ack_interrupt(&mdrv->mdev); +} + +static int __mic_next_db(struct vop_device *vpdev) +{ + return mic_next_card_db(); +} + +static void __iomem *__mic_get_remote_dp(struct vop_device *vpdev) +{ + struct mic_driver *mdrv = vpdev_to_mdrv(vpdev); + + return mdrv->dp; +} + +static void __mic_send_intr(struct vop_device *vpdev, int db) +{ + struct mic_driver *mdrv = vpdev_to_mdrv(vpdev); + + mic_send_intr(&mdrv->mdev, db); +} + +static void __iomem *__mic_ioremap(struct vop_device *vpdev, + dma_addr_t pa, size_t len) +{ + struct mic_driver *mdrv = vpdev_to_mdrv(vpdev); + + return mic_card_map(&mdrv->mdev, pa, len); +} + +static void __mic_iounmap(struct vop_device *vpdev, void __iomem *va) +{ + struct mic_driver *mdrv = vpdev_to_mdrv(vpdev); + + mic_card_unmap(&mdrv->mdev, va); +} + +static struct vop_hw_ops vop_hw_ops = { + .request_irq = __mic_request_irq, + .free_irq = __mic_free_irq, + .ack_interrupt = __mic_ack_interrupt, + .next_db = __mic_next_db, + .get_remote_dp = __mic_get_remote_dp, + .send_intr = __mic_send_intr, + .ioremap = __mic_ioremap, + .iounmap = __mic_iounmap, +}; + static int mic_request_dma_chans(struct mic_driver *mdrv) { dma_cap_mask_t mask; struct dma_chan *chan; - request_module("mic_x100_dma"); dma_cap_zero(mask); dma_cap_set(DMA_MEMCPY, mask); @@ -308,6 +378,13 @@ int __init mic_driver_init(struct mic_driver *mdrv) rc = -ENODEV; goto irq_uninit; } + mdrv->vpdev = vop_register_device(mdrv->dev, VOP_DEV_TRNSP, + NULL, &vop_hw_ops, 0, + NULL, mdrv->dma_ch[0]); + if (IS_ERR(mdrv->vpdev)) { + rc = PTR_ERR(mdrv->vpdev); + goto dma_free; + } bootparam = mdrv->dp; node_id = ioread8(&bootparam->node_id); mdrv->scdev = scif_register_device(mdrv->dev, MIC_SCIF_DEV, @@ -317,11 +394,13 @@ int __init mic_driver_init(struct mic_driver *mdrv) mdrv->num_dma_ch, true); if (IS_ERR(mdrv->scdev)) { rc = PTR_ERR(mdrv->scdev); - goto dma_free; + goto vop_remove; } mic_create_card_debug_dir(mdrv); done: return rc; +vop_remove: + vop_unregister_device(mdrv->vpdev); dma_free: mic_free_dma_chans(mdrv); irq_uninit: @@ -342,6 +421,7 @@ void mic_driver_uninit(struct mic_driver *mdrv) { mic_delete_card_debug_dir(mdrv); scif_unregister_device(mdrv->scdev); + vop_unregister_device(mdrv->vpdev); mic_free_dma_chans(mdrv); mic_uninit_irq(); mic_dp_uninit(); diff --git a/drivers/misc/mic/card/mic_device.h b/drivers/misc/mic/card/mic_device.h index 1dbf83c41289..333dbed972f6 100644 --- a/drivers/misc/mic/card/mic_device.h +++ b/drivers/misc/mic/card/mic_device.h @@ -32,6 +32,7 @@ #include <linux/interrupt.h> #include <linux/mic_bus.h> #include "../bus/scif_bus.h" +#include "../bus/vop_bus.h" /** * struct mic_intr_info - Contains h/w specific interrupt sources info @@ -76,6 +77,7 @@ struct mic_device { * @dma_ch - Array of DMA channels * @num_dma_ch - Number of DMA channels available * @scdev: SCIF device on the SCIF virtual bus. + * @vpdev: Virtio over PCIe device on the VOP virtual bus. */ struct mic_driver { char name[20]; @@ -90,6 +92,7 @@ struct mic_driver { struct dma_chan *dma_ch[MIC_MAX_DMA_CHAN]; int num_dma_ch; struct scif_hw_dev *scdev; + struct vop_device *vpdev; }; /** diff --git a/drivers/misc/mic/card/mic_x100.c b/drivers/misc/mic/card/mic_x100.c index b2958ce2368c..b9f0710ffa6b 100644 --- a/drivers/misc/mic/card/mic_x100.c +++ b/drivers/misc/mic/card/mic_x100.c @@ -326,6 +326,7 @@ static int __init mic_init(void) goto done; } + request_module("mic_x100_dma"); mic_init_card_debugfs(); ret = platform_device_register(&mic_platform_dev); if (ret) { diff --git a/drivers/misc/mic/host/mic_boot.c b/drivers/misc/mic/host/mic_boot.c index 3df305f6282c..8c91c9950b54 100644 --- a/drivers/misc/mic/host/mic_boot.c +++ b/drivers/misc/mic/host/mic_boot.c @@ -25,10 +25,118 @@ #include <linux/mic_common.h> #include <linux/mic_bus.h> #include "../bus/scif_bus.h" +#include "../bus/vop_bus.h" #include "../common/mic_dev.h" #include "mic_device.h" #include "mic_smpt.h" +static inline struct mic_device *vpdev_to_mdev(struct device *dev) +{ + return dev_get_drvdata(dev->parent); +} + +static dma_addr_t +_mic_dma_map_page(struct device *dev, struct page *page, + unsigned long offset, size_t size, + enum dma_data_direction dir, struct dma_attrs *attrs) +{ + void *va = phys_to_virt(page_to_phys(page)) + offset; + struct mic_device *mdev = vpdev_to_mdev(dev); + + return mic_map_single(mdev, va, size); +} + +static void _mic_dma_unmap_page(struct device *dev, dma_addr_t dma_addr, + size_t size, enum dma_data_direction dir, + struct dma_attrs *attrs) +{ + struct mic_device *mdev = vpdev_to_mdev(dev); + + mic_unmap_single(mdev, dma_addr, size); +} + +static const struct dma_map_ops _mic_dma_ops = { + .map_page = _mic_dma_map_page, + .unmap_page = _mic_dma_unmap_page, +}; + +static struct mic_irq * +__mic_request_irq(struct vop_device *vpdev, + irqreturn_t (*func)(int irq, void *data), + const char *name, void *data, int intr_src) +{ + struct mic_device *mdev = vpdev_to_mdev(&vpdev->dev); + + return mic_request_threaded_irq(mdev, func, NULL, name, data, + intr_src, MIC_INTR_DB); +} + +static void __mic_free_irq(struct vop_device *vpdev, + struct mic_irq *cookie, void *data) +{ + struct mic_device *mdev = vpdev_to_mdev(&vpdev->dev); + + return mic_free_irq(mdev, cookie, data); +} + +static void __mic_ack_interrupt(struct vop_device *vpdev, int num) +{ + struct mic_device *mdev = vpdev_to_mdev(&vpdev->dev); + + mdev->ops->intr_workarounds(mdev); +} + +static int __mic_next_db(struct vop_device *vpdev) +{ + struct mic_device *mdev = vpdev_to_mdev(&vpdev->dev); + + return mic_next_db(mdev); +} + +static void *__mic_get_dp(struct vop_device *vpdev) +{ + struct mic_device *mdev = vpdev_to_mdev(&vpdev->dev); + + return mdev->dp; +} + +static void __iomem *__mic_get_remote_dp(struct vop_device *vpdev) +{ + return NULL; +} + +static void __mic_send_intr(struct vop_device *vpdev, int db) +{ + struct mic_device *mdev = vpdev_to_mdev(&vpdev->dev); + + mdev->ops->send_intr(mdev, db); +} + +static void __iomem *__mic_ioremap(struct vop_device *vpdev, + dma_addr_t pa, size_t len) +{ + struct mic_device *mdev = vpdev_to_mdev(&vpdev->dev); + + return mdev->aper.va + pa; +} + +static void __mic_iounmap(struct vop_device *vpdev, void __iomem *va) +{ + /* nothing to do */ +} + +static struct vop_hw_ops vop_hw_ops = { + .request_irq = __mic_request_irq, + .free_irq = __mic_free_irq, + .ack_interrupt = __mic_ack_interrupt, + .next_db = __mic_next_db, + .get_dp = __mic_get_dp, + .get_remote_dp = __mic_get_remote_dp, + .send_intr = __mic_send_intr, + .ioremap = __mic_ioremap, + .iounmap = __mic_iounmap, +}; + static inline struct mic_device *scdev_to_mdev(struct scif_hw_dev *scdev) { return dev_get_drvdata(scdev->dev.parent); @@ -314,7 +422,6 @@ static int mic_request_dma_chans(struct mic_device *mdev) dma_cap_mask_t mask; struct dma_chan *chan; - request_module("mic_x100_dma"); dma_cap_zero(mask); dma_cap_set(DMA_MEMCPY, mask); @@ -386,9 +493,18 @@ static int _mic_start(struct cosm_device *cdev, int id) goto dma_free; } + mdev->vpdev = vop_register_device(&mdev->pdev->dev, + VOP_DEV_TRNSP, &_mic_dma_ops, + &vop_hw_ops, id + 1, &mdev->aper, + mdev->dma_ch[0]); + if (IS_ERR(mdev->vpdev)) { + rc = PTR_ERR(mdev->vpdev); + goto scif_remove; + } + rc = mdev->ops->load_mic_fw(mdev, NULL); if (rc) - goto scif_remove; + goto vop_remove; mic_smpt_restore(mdev); mic_intr_restore(mdev); mdev->intr_ops->enable_interrupts(mdev); @@ -396,6 +512,8 @@ static int _mic_start(struct cosm_device *cdev, int id) mdev->ops->write_spad(mdev, MIC_DPHI_SPAD, mdev->dp_dma_addr >> 32); mdev->ops->send_firmware_intr(mdev); goto unlock_ret; +vop_remove: + vop_unregister_device(mdev->vpdev); scif_remove: scif_unregister_device(mdev->scdev); dma_free: @@ -422,6 +540,7 @@ static void _mic_stop(struct cosm_device *cdev, bool force) * will be the first to be registered and the last to be * unregistered. */ + vop_unregister_device(mdev->vpdev); scif_unregister_device(mdev->scdev); mic_free_dma_chans(mdev); mbus_unregister_device(mdev->dma_mbdev); diff --git a/drivers/misc/mic/host/mic_device.h b/drivers/misc/mic/host/mic_device.h index 8460de122929..52b12b22f4ae 100644 --- a/drivers/misc/mic/host/mic_device.h +++ b/drivers/misc/mic/host/mic_device.h @@ -29,6 +29,7 @@ #include <linux/miscdevice.h> #include <linux/mic_bus.h> #include "../bus/scif_bus.h" +#include "../bus/vop_bus.h" #include "../bus/cosm_bus.h" #include "mic_intr.h" @@ -68,6 +69,7 @@ extern struct cosm_hw_ops cosm_hw_ops; * @dma_ch - Array of DMA channels * @num_dma_ch - Number of DMA channels available * @scdev: SCIF device on the SCIF virtual bus. + * @vpdev: Virtio over PCIe device on the VOP virtual bus. * @cosm_dev: COSM device */ struct mic_device { @@ -92,6 +94,7 @@ struct mic_device { struct dma_chan *dma_ch[MIC_MAX_DMA_CHAN]; int num_dma_ch; struct scif_hw_dev *scdev; + struct vop_device *vpdev; struct cosm_device *cosm_dev; }; diff --git a/drivers/misc/mic/host/mic_main.c b/drivers/misc/mic/host/mic_main.c index 400def2106e7..035be3e9ceba 100644 --- a/drivers/misc/mic/host/mic_main.c +++ b/drivers/misc/mic/host/mic_main.c @@ -317,6 +317,7 @@ static int __init mic_init(void) { int ret; + request_module("mic_x100_dma"); mic_init_debugfs(); ida_init(&g_mic_ida); ret = pci_register_driver(&mic_driver); |