diff options
Diffstat (limited to 'drivers/misc/mic/host')
| -rw-r--r-- | drivers/misc/mic/host/mic_boot.c | 264 | ||||
| -rw-r--r-- | drivers/misc/mic/host/mic_debugfs.c | 13 | ||||
| -rw-r--r-- | drivers/misc/mic/host/mic_device.h | 11 | ||||
| -rw-r--r-- | drivers/misc/mic/host/mic_intr.h | 3 | ||||
| -rw-r--r-- | drivers/misc/mic/host/mic_main.c | 6 | ||||
| -rw-r--r-- | drivers/misc/mic/host/mic_smpt.c | 7 | ||||
| -rw-r--r-- | drivers/misc/mic/host/mic_smpt.h | 1 | ||||
| -rw-r--r-- | drivers/misc/mic/host/mic_virtio.c | 6 | ||||
| -rw-r--r-- | drivers/misc/mic/host/mic_x100.c | 3 |
9 files changed, 291 insertions, 23 deletions
diff --git a/drivers/misc/mic/host/mic_boot.c b/drivers/misc/mic/host/mic_boot.c index d9fa609da061..e5f6a5e7bca1 100644 --- a/drivers/misc/mic/host/mic_boot.c +++ b/drivers/misc/mic/host/mic_boot.c @@ -21,6 +21,7 @@ #include <linux/delay.h> #include <linux/firmware.h> #include <linux/pci.h> +#include <linux/kmod.h> #include <linux/mic_common.h> #include <linux/mic_bus.h> @@ -29,6 +30,188 @@ #include "mic_smpt.h" #include "mic_virtio.h" +static inline struct mic_device *scdev_to_mdev(struct scif_hw_dev *scdev) +{ + return dev_get_drvdata(scdev->dev.parent); +} + +static void *__mic_dma_alloc(struct device *dev, size_t size, + dma_addr_t *dma_handle, gfp_t gfp, + struct dma_attrs *attrs) +{ + struct scif_hw_dev *scdev = dev_get_drvdata(dev); + struct mic_device *mdev = scdev_to_mdev(scdev); + dma_addr_t tmp; + void *va = kmalloc(size, gfp); + + if (va) { + tmp = mic_map_single(mdev, va, size); + if (dma_mapping_error(dev, tmp)) { + kfree(va); + va = NULL; + } else { + *dma_handle = tmp; + } + } + return va; +} + +static void __mic_dma_free(struct device *dev, size_t size, void *vaddr, + dma_addr_t dma_handle, struct dma_attrs *attrs) +{ + struct scif_hw_dev *scdev = dev_get_drvdata(dev); + struct mic_device *mdev = scdev_to_mdev(scdev); + + mic_unmap_single(mdev, dma_handle, size); + kfree(vaddr); +} + +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 scif_hw_dev *scdev = dev_get_drvdata(dev); + struct mic_device *mdev = scdev_to_mdev(scdev); + + 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 scif_hw_dev *scdev = dev_get_drvdata(dev); + struct mic_device *mdev = scdev_to_mdev(scdev); + + mic_unmap_single(mdev, dma_addr, size); +} + +static int __mic_dma_map_sg(struct device *dev, struct scatterlist *sg, + int nents, enum dma_data_direction dir, + struct dma_attrs *attrs) +{ + struct scif_hw_dev *scdev = dev_get_drvdata(dev); + struct mic_device *mdev = scdev_to_mdev(scdev); + struct scatterlist *s; + int i, j, ret; + dma_addr_t da; + + ret = dma_map_sg(mdev->sdev->parent, sg, nents, dir); + if (ret <= 0) + return 0; + + for_each_sg(sg, s, nents, i) { + da = mic_map(mdev, sg_dma_address(s) + s->offset, s->length); + if (!da) + goto err; + sg_dma_address(s) = da; + } + return nents; +err: + for_each_sg(sg, s, i, j) { + mic_unmap(mdev, sg_dma_address(s), s->length); + sg_dma_address(s) = mic_to_dma_addr(mdev, sg_dma_address(s)); + } + dma_unmap_sg(mdev->sdev->parent, sg, nents, dir); + return 0; +} + +static void __mic_dma_unmap_sg(struct device *dev, + struct scatterlist *sg, int nents, + enum dma_data_direction dir, + struct dma_attrs *attrs) +{ + struct scif_hw_dev *scdev = dev_get_drvdata(dev); + struct mic_device *mdev = scdev_to_mdev(scdev); + struct scatterlist *s; + dma_addr_t da; + int i; + + for_each_sg(sg, s, nents, i) { + da = mic_to_dma_addr(mdev, sg_dma_address(s)); + mic_unmap(mdev, sg_dma_address(s), s->length); + sg_dma_address(s) = da; + } + dma_unmap_sg(mdev->sdev->parent, sg, nents, dir); +} + +static struct dma_map_ops __mic_dma_ops = { + .alloc = __mic_dma_alloc, + .free = __mic_dma_free, + .map_page = __mic_dma_map_page, + .unmap_page = __mic_dma_unmap_page, + .map_sg = __mic_dma_map_sg, + .unmap_sg = __mic_dma_unmap_sg, +}; + +static struct mic_irq * +___mic_request_irq(struct scif_hw_dev *scdev, + irqreturn_t (*func)(int irq, void *data), + const char *name, + void *data, int db) +{ + struct mic_device *mdev = scdev_to_mdev(scdev); + + return mic_request_threaded_irq(mdev, func, NULL, name, data, + db, MIC_INTR_DB); +} + +static void +___mic_free_irq(struct scif_hw_dev *scdev, + struct mic_irq *cookie, void *data) +{ + struct mic_device *mdev = scdev_to_mdev(scdev); + + return mic_free_irq(mdev, cookie, data); +} + +static void ___mic_ack_interrupt(struct scif_hw_dev *scdev, int num) +{ + struct mic_device *mdev = scdev_to_mdev(scdev); + + mdev->ops->intr_workarounds(mdev); +} + +static int ___mic_next_db(struct scif_hw_dev *scdev) +{ + struct mic_device *mdev = scdev_to_mdev(scdev); + + return mic_next_db(mdev); +} + +static void ___mic_send_intr(struct scif_hw_dev *scdev, int db) +{ + struct mic_device *mdev = scdev_to_mdev(scdev); + + mdev->ops->send_intr(mdev, db); +} + +static void __iomem *___mic_ioremap(struct scif_hw_dev *scdev, + phys_addr_t pa, size_t len) +{ + struct mic_device *mdev = scdev_to_mdev(scdev); + + return mdev->aper.va + pa; +} + +static void ___mic_iounmap(struct scif_hw_dev *scdev, void __iomem *va) +{ + /* nothing to do */ +} + +static struct scif_hw_ops scif_hw_ops = { + .request_irq = ___mic_request_irq, + .free_irq = ___mic_free_irq, + .ack_interrupt = ___mic_ack_interrupt, + .next_db = ___mic_next_db, + .send_intr = ___mic_send_intr, + .ioremap = ___mic_ioremap, + .iounmap = ___mic_iounmap, +}; + static inline struct mic_device *mbdev_to_mdev(struct mbus_device *mbdev) { return dev_get_drvdata(mbdev->dev.parent); @@ -127,6 +310,58 @@ void mic_bootparam_init(struct mic_device *mdev) bootparam->h2c_config_db = -1; bootparam->shutdown_status = 0; bootparam->shutdown_card = 0; + /* Total nodes = number of MICs + 1 for self node */ + bootparam->tot_nodes = atomic_read(&g_num_mics) + 1; + bootparam->node_id = mdev->id + 1; + bootparam->scif_host_dma_addr = 0x0; + bootparam->scif_card_dma_addr = 0x0; + bootparam->c2h_scif_db = -1; + bootparam->h2c_scif_db = -1; +} + +/** + * mic_request_dma_chans - Request DMA channels + * @mdev: pointer to mic_device instance + * + * returns number of DMA channels acquired + */ +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); + + do { + chan = dma_request_channel(mask, mdev->ops->dma_filter, + mdev->sdev->parent); + if (chan) { + mdev->dma_ch[mdev->num_dma_ch++] = chan; + if (mdev->num_dma_ch >= MIC_MAX_DMA_CHAN) + break; + } + } while (chan); + dev_info(mdev->sdev->parent, "DMA channels # %d\n", mdev->num_dma_ch); + return mdev->num_dma_ch; +} + +/** + * mic_free_dma_chans - release DMA channels + * @mdev: pointer to mic_device instance + * + * returns none + */ +static void mic_free_dma_chans(struct mic_device *mdev) +{ + int i = 0; + + for (i = 0; i < mdev->num_dma_ch; i++) { + dma_release_channel(mdev->dma_ch[i]); + mdev->dma_ch[i] = NULL; + } + mdev->num_dma_ch = 0; } /** @@ -141,6 +376,7 @@ int mic_start(struct mic_device *mdev, const char *buf) { int rc; mutex_lock(&mdev->mic_mutex); + mic_bootparam_init(mdev); retry: if (MIC_OFFLINE != mdev->state) { rc = -EINVAL; @@ -161,14 +397,22 @@ retry: rc = PTR_ERR(mdev->dma_mbdev); goto unlock_ret; } - mdev->dma_ch = mic_request_dma_chan(mdev); - if (!mdev->dma_ch) { - rc = -ENXIO; + if (!mic_request_dma_chans(mdev)) { + rc = -ENODEV; goto dma_remove; } + mdev->scdev = scif_register_device(mdev->sdev->parent, MIC_SCIF_DEV, + &__mic_dma_ops, &scif_hw_ops, + mdev->id + 1, 0, &mdev->mmio, + &mdev->aper, mdev->dp, NULL, + mdev->dma_ch, mdev->num_dma_ch); + if (IS_ERR(mdev->scdev)) { + rc = PTR_ERR(mdev->scdev); + goto dma_free; + } rc = mdev->ops->load_mic_fw(mdev, buf); if (rc) - goto dma_release; + goto scif_remove; mic_smpt_restore(mdev); mic_intr_restore(mdev); mdev->intr_ops->enable_interrupts(mdev); @@ -177,8 +421,10 @@ retry: mdev->ops->send_firmware_intr(mdev); mic_set_state(mdev, MIC_ONLINE); goto unlock_ret; -dma_release: - dma_release_channel(mdev->dma_ch); +scif_remove: + scif_unregister_device(mdev->scdev); +dma_free: + mic_free_dma_chans(mdev); dma_remove: mbus_unregister_device(mdev->dma_mbdev); unlock_ret: @@ -197,11 +443,9 @@ void mic_stop(struct mic_device *mdev, bool force) { mutex_lock(&mdev->mic_mutex); if (MIC_OFFLINE != mdev->state || force) { + scif_unregister_device(mdev->scdev); mic_virtio_reset_devices(mdev); - if (mdev->dma_ch) { - dma_release_channel(mdev->dma_ch); - mdev->dma_ch = NULL; - } + mic_free_dma_chans(mdev); mbus_unregister_device(mdev->dma_mbdev); mic_bootparam_init(mdev); mic_reset(mdev); diff --git a/drivers/misc/mic/host/mic_debugfs.c b/drivers/misc/mic/host/mic_debugfs.c index 687e9aacf3bb..3c9ea4896f3c 100644 --- a/drivers/misc/mic/host/mic_debugfs.c +++ b/drivers/misc/mic/host/mic_debugfs.c @@ -214,6 +214,19 @@ static int mic_dp_show(struct seq_file *s, void *pos) bootparam->shutdown_status); seq_printf(s, "Bootparam: shutdown_card %d\n", bootparam->shutdown_card); + seq_printf(s, "Bootparam: tot_nodes %d\n", + bootparam->tot_nodes); + seq_printf(s, "Bootparam: node_id %d\n", + bootparam->node_id); + seq_printf(s, "Bootparam: c2h_scif_db %d\n", + bootparam->c2h_scif_db); + seq_printf(s, "Bootparam: h2c_scif_db %d\n", + bootparam->h2c_scif_db); + seq_printf(s, "Bootparam: scif_host_dma_addr 0x%llx\n", + bootparam->scif_host_dma_addr); + seq_printf(s, "Bootparam: scif_card_dma_addr 0x%llx\n", + bootparam->scif_card_dma_addr); + for (i = sizeof(*bootparam); i < MIC_DP_SIZE; i += mic_total_desc_size(d)) { diff --git a/drivers/misc/mic/host/mic_device.h b/drivers/misc/mic/host/mic_device.h index 016bd15a7bd1..01a7555aa648 100644 --- a/drivers/misc/mic/host/mic_device.h +++ b/drivers/misc/mic/host/mic_device.h @@ -27,7 +27,7 @@ #include <linux/irqreturn.h> #include <linux/dmaengine.h> #include <linux/mic_bus.h> - +#include "../bus/scif_bus.h" #include "mic_intr.h" /* The maximum number of MIC devices supported in a single host system. */ @@ -90,7 +90,9 @@ enum mic_stepping { * @vdev_list: list of virtio devices. * @pm_notifier: Handles PM notifications from the OS. * @dma_mbdev: MIC BUS DMA device. - * @dma_ch: DMA channel reserved by this driver for use by virtio devices. + * @dma_ch - Array of DMA channels + * @num_dma_ch - Number of DMA channels available + * @scdev: SCIF device on the SCIF virtual bus. */ struct mic_device { struct mic_mw mmio; @@ -129,7 +131,9 @@ struct mic_device { struct list_head vdev_list; struct notifier_block pm_notifier; struct mbus_device *dma_mbdev; - struct dma_chan *dma_ch; + struct dma_chan *dma_ch[MIC_MAX_DMA_CHAN]; + int num_dma_ch; + struct scif_hw_dev *scdev; }; /** @@ -228,4 +232,5 @@ void mic_exit_debugfs(void); void mic_prepare_suspend(struct mic_device *mdev); void mic_complete_resume(struct mic_device *mdev); void mic_suspend(struct mic_device *mdev); +extern atomic_t g_num_mics; #endif diff --git a/drivers/misc/mic/host/mic_intr.h b/drivers/misc/mic/host/mic_intr.h index 9f783d4ad7f1..cce28824db8a 100644 --- a/drivers/misc/mic/host/mic_intr.h +++ b/drivers/misc/mic/host/mic_intr.h @@ -28,8 +28,9 @@ * 3 for virtio network, console and block devices. * 1 for card shutdown notifications. * 4 for host owned DMA channels. + * 1 for SCIF */ -#define MIC_MIN_MSIX 8 +#define MIC_MIN_MSIX 9 #define MIC_NUM_OFFSETS 32 /** diff --git a/drivers/misc/mic/host/mic_main.c b/drivers/misc/mic/host/mic_main.c index ab37a3117d23..456462932151 100644 --- a/drivers/misc/mic/host/mic_main.c +++ b/drivers/misc/mic/host/mic_main.c @@ -67,6 +67,8 @@ static struct ida g_mic_ida; static struct class *g_mic_class; /* Base device node number for MIC devices */ static dev_t g_mic_devno; +/* Track the total number of MIC devices */ +atomic_t g_num_mics; static const struct file_operations mic_fops = { .open = mic_open, @@ -408,6 +410,7 @@ static int mic_probe(struct pci_dev *pdev, dev_err(&pdev->dev, "cdev_add err id %d rc %d\n", mdev->id, rc); goto cleanup_debug_dir; } + atomic_inc(&g_num_mics); return 0; cleanup_debug_dir: mic_delete_debug_dir(mdev); @@ -459,6 +462,7 @@ static void mic_remove(struct pci_dev *pdev) return; mic_stop(mdev, false); + atomic_dec(&g_num_mics); cdev_del(&mdev->cdev); mic_delete_debug_dir(mdev); mutex_lock(&mdev->mic_mutex); @@ -478,6 +482,7 @@ static void mic_remove(struct pci_dev *pdev) ida_simple_remove(&g_mic_ida, mdev->id); kfree(mdev); } + static struct pci_driver mic_driver = { .name = mic_driver_name, .id_table = mic_pci_tbl, @@ -512,6 +517,7 @@ static int __init mic_init(void) } return ret; cleanup_debugfs: + ida_destroy(&g_mic_ida); mic_exit_debugfs(); class_destroy(g_mic_class); cleanup_chrdev: diff --git a/drivers/misc/mic/host/mic_smpt.c b/drivers/misc/mic/host/mic_smpt.c index fae474c4899e..cec82034875f 100644 --- a/drivers/misc/mic/host/mic_smpt.c +++ b/drivers/misc/mic/host/mic_smpt.c @@ -174,8 +174,7 @@ static int mic_get_smpt_ref_count(struct mic_device *mdev, dma_addr_t dma_addr, * * returns a DMA address. */ -static dma_addr_t -mic_to_dma_addr(struct mic_device *mdev, dma_addr_t mic_addr) +dma_addr_t mic_to_dma_addr(struct mic_device *mdev, dma_addr_t mic_addr) { struct mic_smpt_info *smpt_info = mdev->smpt; int spt; @@ -214,7 +213,7 @@ dma_addr_t mic_map(struct mic_device *mdev, dma_addr_t dma_addr, size_t size) if (!size || size > mic_max_system_memory(mdev)) return mic_addr; - ref = kmalloc(mdev->smpt->info.num_reg * sizeof(s64), GFP_KERNEL); + ref = kmalloc_array(mdev->smpt->info.num_reg, sizeof(s64), GFP_ATOMIC); if (!ref) return mic_addr; @@ -271,7 +270,7 @@ void mic_unmap(struct mic_device *mdev, dma_addr_t mic_addr, size_t size) } spt = mic_sys_addr_to_smpt(mdev, mic_addr); - ref = kmalloc(mdev->smpt->info.num_reg * sizeof(s64), GFP_KERNEL); + ref = kmalloc_array(mdev->smpt->info.num_reg, sizeof(s64), GFP_ATOMIC); if (!ref) return; diff --git a/drivers/misc/mic/host/mic_smpt.h b/drivers/misc/mic/host/mic_smpt.h index 51970abfe7df..68721c6e7455 100644 --- a/drivers/misc/mic/host/mic_smpt.h +++ b/drivers/misc/mic/host/mic_smpt.h @@ -78,6 +78,7 @@ void mic_unmap_single(struct mic_device *mdev, dma_addr_t mic_map(struct mic_device *mdev, dma_addr_t dma_addr, size_t size); void mic_unmap(struct mic_device *mdev, dma_addr_t mic_addr, size_t size); +dma_addr_t mic_to_dma_addr(struct mic_device *mdev, dma_addr_t mic_addr); /** * mic_map_error - Check a MIC address for errors. diff --git a/drivers/misc/mic/host/mic_virtio.c b/drivers/misc/mic/host/mic_virtio.c index a020e4eb435a..cc08e9f733c9 100644 --- a/drivers/misc/mic/host/mic_virtio.c +++ b/drivers/misc/mic/host/mic_virtio.c @@ -40,7 +40,7 @@ static int mic_sync_dma(struct mic_device *mdev, dma_addr_t dst, { int err = 0; struct dma_async_tx_descriptor *tx; - struct dma_chan *mic_ch = mdev->dma_ch; + struct dma_chan *mic_ch = mdev->dma_ch[0]; if (!mic_ch) { err = -EBUSY; @@ -80,7 +80,7 @@ static int mic_virtio_copy_to_user(struct mic_vdev *mvdev, void __user *ubuf, struct mic_device *mdev = mvdev->mdev; void __iomem *dbuf = mdev->aper.va + daddr; struct mic_vringh *mvr = &mvdev->mvr[vr_idx]; - size_t dma_alignment = 1 << mdev->dma_ch->device->copy_align; + size_t dma_alignment = 1 << mdev->dma_ch[0]->device->copy_align; size_t dma_offset; size_t partlen; int err; @@ -129,7 +129,7 @@ static int mic_virtio_copy_from_user(struct mic_vdev *mvdev, void __user *ubuf, struct mic_device *mdev = mvdev->mdev; void __iomem *dbuf = mdev->aper.va + daddr; struct mic_vringh *mvr = &mvdev->mvr[vr_idx]; - size_t dma_alignment = 1 << mdev->dma_ch->device->copy_align; + size_t dma_alignment = 1 << mdev->dma_ch[0]->device->copy_align; size_t partlen; int err; diff --git a/drivers/misc/mic/host/mic_x100.c b/drivers/misc/mic/host/mic_x100.c index b7a21e11dcdf..3341e90dede4 100644 --- a/drivers/misc/mic/host/mic_x100.c +++ b/drivers/misc/mic/host/mic_x100.c @@ -167,8 +167,7 @@ static void mic_x100_send_intr(struct mic_device *mdev, int doorbell) if (doorbell < MIC_X100_NUM_SBOX_IRQ) { mic_x100_send_sbox_intr(mdev, doorbell); } else { - rdmasr_db = doorbell - MIC_X100_NUM_SBOX_IRQ + - MIC_X100_RDMASR_IRQ_BASE; + rdmasr_db = doorbell - MIC_X100_NUM_SBOX_IRQ; mic_x100_send_rdmasr_intr(mdev, rdmasr_db); } } |