From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dmitry Osipenko Subject: [PATCH 17/22] gpu: host1x: Check waits in the firewall Date: Tue, 23 May 2017 03:14:32 +0300 Message-ID: <1c406c0f1ed144abb3d4b5f52272c5cd6faa2d3a.1495498184.git.digetx@gmail.com> References: Return-path: In-Reply-To: In-Reply-To: References: Sender: linux-tegra-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Thierry Reding , Mikko Perttunen Cc: linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, DRI Development , Erik Faye-Lund List-Id: dri-devel@lists.freedesktop.org Check waits in the firewall in a way it is done for relocations. Signed-off-by: Dmitry Osipenko --- drivers/gpu/host1x/job.c | 36 ++++++++++++++++++++++++++++++++++-- 1 file changed, 34 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/host1x/job.c b/drivers/gpu/host1x/job.c index 65e12219405a..7bc7d0c64559 100644 --- a/drivers/gpu/host1x/job.c +++ b/drivers/gpu/host1x/job.c @@ -31,6 +31,8 @@ #include "job.h" #include "syncpt.h" +#define HOST1X_WAIT_SYNCPT_OFFSET 0x8 + struct host1x_job *host1x_job_alloc(struct host1x_channel *ch, u32 num_cmdbufs, u32 num_relocs, u32 num_waitchks) @@ -339,6 +341,17 @@ static bool check_reloc(struct host1x_reloc *reloc, struct host1x_bo *cmdbuf, return true; } +static bool check_wait(struct host1x_waitchk *wait, struct host1x_bo *cmdbuf, + unsigned int offset) +{ + offset *= sizeof(u32); + + if (wait->bo != cmdbuf || wait->offset != offset) + return false; + + return true; +} + struct host1x_firewall { struct host1x_job *job; struct device *dev; @@ -346,6 +359,9 @@ struct host1x_firewall { unsigned int num_relocs; struct host1x_reloc *reloc; + unsigned int num_waitchks; + struct host1x_waitchk *waitchk; + struct host1x_bo *cmdbuf; unsigned int offset; @@ -372,6 +388,20 @@ static int check_register(struct host1x_firewall *fw, unsigned long offset) fw->reloc++; } + if (offset == HOST1X_WAIT_SYNCPT_OFFSET) { + if (fw->class != HOST1X_CLASS_HOST1X) + return -EINVAL; + + if (!fw->num_waitchks) + return -EINVAL; + + if (!check_wait(fw->waitchk, fw->cmdbuf, fw->offset)) + return -EINVAL; + + fw->num_waitchks--; + fw->waitchk++; + } + return 0; } @@ -536,6 +566,8 @@ static inline int copy_gathers(struct host1x_job *job, struct device *dev) fw.dev = dev; fw.reloc = job->relocarray; fw.num_relocs = job->num_relocs; + fw.waitchk = job->waitchk; + fw.num_waitchks = job->num_waitchk; fw.class = job->class; for (i = 0; i < job->num_gathers; i++) { @@ -574,8 +606,8 @@ static inline int copy_gathers(struct host1x_job *job, struct device *dev) offset += g->words * sizeof(u32); } - /* No relocs should remain at this point */ - if (fw.num_relocs) + /* No relocs and waitchks should remain at this point */ + if (fw.num_relocs || fw.num_waitchks) return -EINVAL; return 0; -- 2.13.0