diff options
Diffstat (limited to 'drivers/gpu/host1x')
-rw-r--r-- | drivers/gpu/host1x/bus.c | 79 | ||||
-rw-r--r-- | drivers/gpu/host1x/dev.c | 4 | ||||
-rw-r--r-- | drivers/gpu/host1x/job.c | 55 | ||||
-rw-r--r-- | drivers/gpu/host1x/syncpt.c | 2 |
4 files changed, 116 insertions, 24 deletions
diff --git a/drivers/gpu/host1x/bus.c b/drivers/gpu/host1x/bus.c index 2c8559ff3481..6a995db51d6d 100644 --- a/drivers/gpu/host1x/bus.c +++ b/drivers/gpu/host1x/bus.c @@ -120,7 +120,7 @@ static void host1x_subdev_register(struct host1x_device *device, mutex_lock(&device->clients_lock); list_move_tail(&client->list, &device->clients); list_move_tail(&subdev->list, &device->active); - client->parent = &device->dev; + client->host = &device->dev; subdev->client = client; mutex_unlock(&device->clients_lock); mutex_unlock(&device->subdevs_lock); @@ -156,7 +156,7 @@ static void __host1x_subdev_unregister(struct host1x_device *device, */ mutex_lock(&device->clients_lock); subdev->client = NULL; - client->parent = NULL; + client->host = NULL; list_move_tail(&subdev->list, &device->subdevs); /* * XXX: Perhaps don't do this here, but rather explicitly remove it @@ -710,6 +710,10 @@ int host1x_client_register(struct host1x_client *client) struct host1x *host1x; int err; + INIT_LIST_HEAD(&client->list); + mutex_init(&client->lock); + client->usecount = 0; + mutex_lock(&devices_lock); list_for_each_entry(host1x, &devices, list) { @@ -768,3 +772,74 @@ int host1x_client_unregister(struct host1x_client *client) return 0; } EXPORT_SYMBOL(host1x_client_unregister); + +int host1x_client_suspend(struct host1x_client *client) +{ + int err = 0; + + mutex_lock(&client->lock); + + if (client->usecount == 1) { + if (client->ops && client->ops->suspend) { + err = client->ops->suspend(client); + if (err < 0) + goto unlock; + } + } + + client->usecount--; + dev_dbg(client->dev, "use count: %u\n", client->usecount); + + if (client->parent) { + err = host1x_client_suspend(client->parent); + if (err < 0) + goto resume; + } + + goto unlock; + +resume: + if (client->usecount == 0) + if (client->ops && client->ops->resume) + client->ops->resume(client); + + client->usecount++; +unlock: + mutex_unlock(&client->lock); + return err; +} +EXPORT_SYMBOL(host1x_client_suspend); + +int host1x_client_resume(struct host1x_client *client) +{ + int err = 0; + + mutex_lock(&client->lock); + + if (client->parent) { + err = host1x_client_resume(client->parent); + if (err < 0) + goto unlock; + } + + if (client->usecount == 0) { + if (client->ops && client->ops->resume) { + err = client->ops->resume(client); + if (err < 0) + goto suspend; + } + } + + client->usecount++; + dev_dbg(client->dev, "use count: %u\n", client->usecount); + + goto unlock; + +suspend: + if (client->parent) + host1x_client_suspend(client->parent); +unlock: + mutex_unlock(&client->lock); + return err; +} +EXPORT_SYMBOL(host1x_client_resume); diff --git a/drivers/gpu/host1x/dev.c b/drivers/gpu/host1x/dev.c index a738ea55e407..388bcc2889aa 100644 --- a/drivers/gpu/host1x/dev.c +++ b/drivers/gpu/host1x/dev.c @@ -339,10 +339,8 @@ static int host1x_probe(struct platform_device *pdev) } syncpt_irq = platform_get_irq(pdev, 0); - if (syncpt_irq < 0) { - dev_err(&pdev->dev, "failed to get IRQ: %d\n", syncpt_irq); + if (syncpt_irq < 0) return syncpt_irq; - } mutex_init(&host->devices_lock); INIT_LIST_HEAD(&host->devices); diff --git a/drivers/gpu/host1x/job.c b/drivers/gpu/host1x/job.c index 25ca54de8fc5..a10643aa89aa 100644 --- a/drivers/gpu/host1x/job.c +++ b/drivers/gpu/host1x/job.c @@ -8,6 +8,7 @@ #include <linux/dma-mapping.h> #include <linux/err.h> #include <linux/host1x.h> +#include <linux/iommu.h> #include <linux/kref.h> #include <linux/module.h> #include <linux/scatterlist.h> @@ -101,9 +102,11 @@ static unsigned int pin_job(struct host1x *host, struct host1x_job *job) { struct host1x_client *client = job->client; struct device *dev = client->dev; + struct iommu_domain *domain; unsigned int i; int err; + domain = iommu_get_domain_for_dev(dev); job->num_unpins = 0; for (i = 0; i < job->num_relocs; i++) { @@ -117,7 +120,19 @@ static unsigned int pin_job(struct host1x *host, struct host1x_job *job) goto unpin; } - if (client->group) + /* + * If the client device is not attached to an IOMMU, the + * physical address of the buffer object can be used. + * + * Similarly, when an IOMMU domain is shared between all + * host1x clients, the IOVA is already available, so no + * need to map the buffer object again. + * + * XXX Note that this isn't always safe to do because it + * relies on an assumption that no cache maintenance is + * needed on the buffer objects. + */ + if (!domain || client->group) phys = &phys_addr; else phys = NULL; @@ -176,6 +191,7 @@ static unsigned int pin_job(struct host1x *host, struct host1x_job *job) dma_addr_t phys_addr; unsigned long shift; struct iova *alloc; + dma_addr_t *phys; unsigned int j; g->bo = host1x_bo_get(g->bo); @@ -184,7 +200,17 @@ static unsigned int pin_job(struct host1x *host, struct host1x_job *job) goto unpin; } - sgt = host1x_bo_pin(host->dev, g->bo, NULL); + /** + * If the host1x is not attached to an IOMMU, there is no need + * to map the buffer object for the host1x, since the physical + * address can simply be used. + */ + if (!iommu_get_domain_for_dev(host->dev)) + phys = &phys_addr; + else + phys = NULL; + + sgt = host1x_bo_pin(host->dev, g->bo, phys); if (IS_ERR(sgt)) { err = PTR_ERR(sgt); goto unpin; @@ -214,7 +240,7 @@ static unsigned int pin_job(struct host1x *host, struct host1x_job *job) job->unpins[job->num_unpins].size = gather_size; phys_addr = iova_dma_addr(&host->iova, alloc); - } else { + } else if (sgt) { err = dma_map_sg(host->dev, sgt->sgl, sgt->nents, DMA_TO_DEVICE); if (!err) { @@ -222,6 +248,7 @@ static unsigned int pin_job(struct host1x *host, struct host1x_job *job) goto unpin; } + job->unpins[job->num_unpins].dir = DMA_TO_DEVICE; job->unpins[job->num_unpins].dev = host->dev; phys_addr = sg_dma_address(sgt->sgl); } @@ -229,7 +256,6 @@ static unsigned int pin_job(struct host1x *host, struct host1x_job *job) job->addr_phys[job->num_unpins] = phys_addr; job->gather_addr_phys[i] = phys_addr; - job->unpins[job->num_unpins].dir = DMA_TO_DEVICE; job->unpins[job->num_unpins].bo = g->bo; job->unpins[job->num_unpins].sgt = sgt; job->num_unpins++; @@ -244,8 +270,7 @@ unpin: static int do_relocs(struct host1x_job *job, struct host1x_job_gather *g) { - u32 last_page = ~0; - void *cmdbuf_page_addr = NULL; + void *cmdbuf_addr = NULL; struct host1x_bo *cmdbuf = g->bo; unsigned int i; @@ -267,28 +292,22 @@ static int do_relocs(struct host1x_job *job, struct host1x_job_gather *g) goto patch_reloc; } - if (last_page != reloc->cmdbuf.offset >> PAGE_SHIFT) { - if (cmdbuf_page_addr) - host1x_bo_kunmap(cmdbuf, last_page, - cmdbuf_page_addr); - - cmdbuf_page_addr = host1x_bo_kmap(cmdbuf, - reloc->cmdbuf.offset >> PAGE_SHIFT); - last_page = reloc->cmdbuf.offset >> PAGE_SHIFT; + if (!cmdbuf_addr) { + cmdbuf_addr = host1x_bo_mmap(cmdbuf); - if (unlikely(!cmdbuf_page_addr)) { + if (unlikely(!cmdbuf_addr)) { pr_err("Could not map cmdbuf for relocation\n"); return -ENOMEM; } } - target = cmdbuf_page_addr + (reloc->cmdbuf.offset & ~PAGE_MASK); + target = cmdbuf_addr + reloc->cmdbuf.offset; patch_reloc: *target = reloc_addr; } - if (cmdbuf_page_addr) - host1x_bo_kunmap(cmdbuf, last_page, cmdbuf_page_addr); + if (cmdbuf_addr) + host1x_bo_munmap(cmdbuf, cmdbuf_addr); return 0; } diff --git a/drivers/gpu/host1x/syncpt.c b/drivers/gpu/host1x/syncpt.c index dd1cd0142941..fce7892d5137 100644 --- a/drivers/gpu/host1x/syncpt.c +++ b/drivers/gpu/host1x/syncpt.c @@ -421,7 +421,7 @@ int host1x_syncpt_init(struct host1x *host) struct host1x_syncpt *host1x_syncpt_request(struct host1x_client *client, unsigned long flags) { - struct host1x *host = dev_get_drvdata(client->parent->parent); + struct host1x *host = dev_get_drvdata(client->host->parent); return host1x_syncpt_alloc(host, client, flags); } |