Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756348Ab3JNM0Q (ORCPT ); Mon, 14 Oct 2013 08:26:16 -0400 Received: from hqemgate15.nvidia.com ([216.228.121.64]:18674 "EHLO hqemgate15.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755933Ab3JNM0L (ORCPT ); Mon, 14 Oct 2013 08:26:11 -0400 X-PGP-Universal: processed; by hqnvupgp08.nvidia.com on Mon, 14 Oct 2013 05:21:49 -0700 From: Arto Merilainen To: , CC: , , , Subject: [PATCHv2 2/4] gpu: host1x: Add syncpoint base support Date: Mon, 14 Oct 2013 15:21:53 +0300 Message-ID: <1381753315-21778-3-git-send-email-amerilainen@nvidia.com> X-Mailer: git-send-email 1.8.1.5 In-Reply-To: <1381753315-21778-1-git-send-email-amerilainen@nvidia.com> References: <1381753315-21778-1-git-send-email-amerilainen@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6383 Lines: 215 This patch adds support for hardware syncpoint bases. This creates a simple mechanism to stall the command FIFO until an operation is completed. Signed-off-by: Arto Merilainen --- drivers/gpu/host1x/dev.h | 2 ++ drivers/gpu/host1x/hw/channel_hw.c | 19 +++++++++++++ drivers/gpu/host1x/hw/hw_host1x01_uclass.h | 6 ++++ drivers/gpu/host1x/syncpt.c | 44 ++++++++++++++++++++++++++++-- drivers/gpu/host1x/syncpt.h | 7 +++++ 5 files changed, 76 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/host1x/dev.h b/drivers/gpu/host1x/dev.h index bed90a8..516ce0a 100644 --- a/drivers/gpu/host1x/dev.h +++ b/drivers/gpu/host1x/dev.h @@ -27,6 +27,7 @@ #include "job.h" struct host1x_syncpt; +struct host1x_syncpt_base; struct host1x_channel; struct host1x_cdma; struct host1x_job; @@ -102,6 +103,7 @@ struct host1x { void __iomem *regs; struct host1x_syncpt *syncpt; + struct host1x_syncpt_base *bases; struct device *dev; struct clk *clk; diff --git a/drivers/gpu/host1x/hw/channel_hw.c b/drivers/gpu/host1x/hw/channel_hw.c index ee19962..06f44bf 100644 --- a/drivers/gpu/host1x/hw/channel_hw.c +++ b/drivers/gpu/host1x/hw/channel_hw.c @@ -67,6 +67,21 @@ static void submit_gathers(struct host1x_job *job) } } +static inline void synchronize_syncpt_base(struct host1x_job *job) +{ + struct host1x_channel *ch = job->channel; + struct host1x *host = dev_get_drvdata(ch->dev->parent); + struct host1x_syncpt *sp = host->syncpt + job->syncpt_id; + u32 base_id = sp->base->id; + u32 base_val = host1x_syncpt_read_max(sp); + + host1x_cdma_push(&ch->cdma, + host1x_opcode_setclass(HOST1X_CLASS_HOST1X, + HOST1X_UCLASS_LOAD_SYNCPT_BASE, 1), + HOST1X_UCLASS_LOAD_SYNCPT_BASE_BASE_INDX_F(base_id) | + HOST1X_UCLASS_LOAD_SYNCPT_BASE_VALUE_F(base_val)); +} + static int channel_submit(struct host1x_job *job) { struct host1x_channel *ch = job->channel; @@ -118,6 +133,10 @@ static int channel_submit(struct host1x_job *job) host1x_syncpt_read_max(sp))); } + /* Synchronize base register to allow using it for relative waiting */ + if (sp->base) + synchronize_syncpt_base(job); + syncval = host1x_syncpt_incr_max(sp, user_syncpt_incrs); job->syncpt_end = syncval; diff --git a/drivers/gpu/host1x/hw/hw_host1x01_uclass.h b/drivers/gpu/host1x/hw/hw_host1x01_uclass.h index 42f3ce1..f755359 100644 --- a/drivers/gpu/host1x/hw/hw_host1x01_uclass.h +++ b/drivers/gpu/host1x/hw/hw_host1x01_uclass.h @@ -111,6 +111,12 @@ static inline u32 host1x_uclass_wait_syncpt_base_offset_f(u32 v) } #define HOST1X_UCLASS_WAIT_SYNCPT_BASE_OFFSET_F(v) \ host1x_uclass_wait_syncpt_base_offset_f(v) +static inline u32 host1x_uclass_load_syncpt_base_r(void) +{ + return 0xb; +} +#define HOST1X_UCLASS_LOAD_SYNCPT_BASE \ + host1x_uclass_load_syncpt_base_r() static inline u32 host1x_uclass_load_syncpt_base_base_indx_f(u32 v) { return (v & 0xff) << 24; diff --git a/drivers/gpu/host1x/syncpt.c b/drivers/gpu/host1x/syncpt.c index d376cd4..b5cb97c 100644 --- a/drivers/gpu/host1x/syncpt.c +++ b/drivers/gpu/host1x/syncpt.c @@ -30,6 +30,28 @@ #define SYNCPT_CHECK_PERIOD (2 * HZ) #define MAX_STUCK_CHECK_COUNT 15 +static struct host1x_syncpt_base *host1x_base_alloc(struct host1x *host) +{ + struct host1x_syncpt_base *bases = host->bases; + unsigned int i; + + for (i = 0; i < host->info->nb_bases; i++) + if (!bases[i].requested) + break; + + if (i >= host->info->nb_bases) + return NULL; + + bases[i].requested = true; + return &bases[i]; +} + +static void host1x_syncpt_base_free(struct host1x_syncpt_base *base) +{ + if (base) + base->requested = false; +} + static struct host1x_syncpt *host1x_syncpt_alloc(struct host1x *host, struct device *dev, unsigned long flags) @@ -44,6 +66,12 @@ static struct host1x_syncpt *host1x_syncpt_alloc(struct host1x *host, if (i >= host->info->nb_pts) return NULL; + if (flags & HOST1X_SYNCPT_HAS_BASE) { + sp->base = host1x_base_alloc(host); + if (!sp->base) + return NULL; + } + name = kasprintf(GFP_KERNEL, "%02d-%s", sp->id, dev ? dev_name(dev) : NULL); if (!name) @@ -304,19 +332,29 @@ int host1x_syncpt_patch_wait(struct host1x_syncpt *sp, void *patch_addr) int host1x_syncpt_init(struct host1x *host) { struct host1x_syncpt *syncpt; + struct host1x_syncpt_base *bases; int i; syncpt = devm_kzalloc(host->dev, sizeof(*syncpt) * host->info->nb_pts, - GFP_KERNEL); + GFP_KERNEL); if (!syncpt) return -ENOMEM; - for (i = 0; i < host->info->nb_pts; ++i) { + bases = devm_kzalloc(host->dev, sizeof(*bases) * host->info->nb_bases, + GFP_KERNEL); + if (!bases) + return -ENOMEM; + + for (i = 0; i < host->info->nb_pts; i++) { syncpt[i].id = i; syncpt[i].host = host; } + for (i = 0; i < host->info->nb_bases; i++) + bases[i].id = i; + host->syncpt = syncpt; + host->bases = bases; host1x_syncpt_restore(host); @@ -340,7 +378,9 @@ void host1x_syncpt_free(struct host1x_syncpt *sp) if (!sp) return; + host1x_syncpt_base_free(sp->base); kfree(sp->name); + sp->base = NULL; sp->dev = NULL; sp->name = NULL; sp->client_managed = false; diff --git a/drivers/gpu/host1x/syncpt.h b/drivers/gpu/host1x/syncpt.h index 1de7b58..28ec886 100644 --- a/drivers/gpu/host1x/syncpt.h +++ b/drivers/gpu/host1x/syncpt.h @@ -30,6 +30,11 @@ struct host1x; /* Reserved for replacing an expired wait with a NOP */ #define HOST1X_SYNCPT_RESERVED 0 +struct host1x_syncpt_base { + unsigned int id; + bool requested; +}; + struct host1x_syncpt { int id; atomic_t min_val; @@ -39,6 +44,7 @@ struct host1x_syncpt { bool client_managed; struct host1x *host; struct device *dev; + struct host1x_syncpt_base *base; /* interrupt data */ struct host1x_syncpt_intr intr; @@ -154,6 +160,7 @@ u32 host1x_syncpt_id(struct host1x_syncpt *sp); /* Allocate a sync point for a device. */ #define HOST1X_SYNCPT_CLIENT_MANAGED (1 << 0) +#define HOST1X_SYNCPT_HAS_BASE (1 << 1) struct host1x_syncpt *host1x_syncpt_request(struct device *dev, unsigned long flags); -- 1.8.1.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/