From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Suman Anna Subject: [PATCH 3/4] remoteproc: add support for a new 64-bit trace version Date: Wed, 25 Mar 2020 15:47:00 -0500 Message-ID: <20200325204701.16862-4-s-anna@ti.com> In-Reply-To: <20200325204701.16862-1-s-anna@ti.com> References: <20200325204701.16862-1-s-anna@ti.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain To: Bjorn Andersson , Rob Herring , Mathieu Poirier Cc: Clement Leger , Loic Pallardy , Arnaud Pouliquen , Lokesh Vutla , linux-remoteproc@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Suman Anna List-ID: Introduce a new trace entry resource structure that accommodates a 64-bit device address to support 64-bit processors. This is to be used using an overloaded version value of 1 in the upper 32-bits of the previous resource type field. The new resource still uses 32-bits for the length field (followed by a 32-bit reserved field, so can be updated in the future), which is a sufficiently large trace buffer size. A 32-bit padding field also had to be added to align the device address on a 64-bit boundary, and match the usage on the firmware side. The remoteproc debugfs logic also has been adjusted accordingly. Signed-off-by: Suman Anna --- drivers/remoteproc/remoteproc_core.c | 40 ++++++++++++++++++++----- drivers/remoteproc/remoteproc_debugfs.c | 37 ++++++++++++++++++----- include/linux/remoteproc.h | 26 ++++++++++++++++ 3 files changed, 87 insertions(+), 16 deletions(-) diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c index 53bc37c508c6..b9a097990862 100644 --- a/drivers/remoteproc/remoteproc_core.c +++ b/drivers/remoteproc/remoteproc_core.c @@ -609,21 +609,45 @@ void rproc_vdev_release(struct kref *ref) * * Returns 0 on success, or an appropriate error code otherwise */ -static int rproc_handle_trace(struct rproc *rproc, struct fw_rsc_trace *rsc, +static int rproc_handle_trace(struct rproc *rproc, void *rsc, int offset, int avail, u16 ver) { struct rproc_debug_trace *trace; struct device *dev = &rproc->dev; + struct fw_rsc_trace *rsc1; + struct fw_rsc_trace2 *rsc2; char name[15]; + size_t rsc_size; + u32 reserved; + u64 da; + u32 len; + + if (!ver) { + rsc1 = (struct fw_rsc_trace *)rsc; + rsc_size = sizeof(*rsc1); + reserved = rsc1->reserved; + da = rsc1->da; + len = rsc1->len; + } else if (ver == 1) { + rsc2 = (struct fw_rsc_trace2 *)rsc; + rsc_size = sizeof(*rsc2); + reserved = rsc2->reserved; + da = rsc2->da; + len = rsc2->len; + } else { + dev_err(dev, "unsupported trace rsc version %d\n", ver); + return -EINVAL; + } - if (sizeof(*rsc) > avail) { + if (rsc_size > avail) { dev_err(dev, "trace rsc is truncated\n"); return -EINVAL; } /* make sure reserved bytes are zeroes */ - if (rsc->reserved) { - dev_err(dev, "trace rsc has non zero reserved bytes\n"); + if (reserved) { + dev_err(dev, "trace rsc has non zero reserved bytes, value = 0x%x\n", + reserved); return -EINVAL; } @@ -632,8 +656,8 @@ static int rproc_handle_trace(struct rproc *rproc, struct fw_rsc_trace *rsc, return -ENOMEM; /* set the trace buffer dma properties */ - trace->trace_mem.len = rsc->len; - trace->trace_mem.da = rsc->da; + trace->trace_mem.len = len; + trace->trace_mem.da = da; /* set pointer on rproc device */ trace->rproc = rproc; @@ -652,8 +676,8 @@ static int rproc_handle_trace(struct rproc *rproc, struct fw_rsc_trace *rsc, rproc->num_traces++; - dev_dbg(dev, "%s added: da 0x%x, len 0x%x\n", - name, rsc->da, rsc->len); + dev_dbg(dev, "%s added: da 0x%llx, len 0x%x\n", + name, da, len); return 0; } diff --git a/drivers/remoteproc/remoteproc_debugfs.c b/drivers/remoteproc/remoteproc_debugfs.c index 3560eed7a360..ff43736db45a 100644 --- a/drivers/remoteproc/remoteproc_debugfs.c +++ b/drivers/remoteproc/remoteproc_debugfs.c @@ -192,7 +192,8 @@ static int rproc_rsc_table_show(struct seq_file *seq, void *p) struct resource_table *table = rproc->table_ptr; struct fw_rsc_carveout *c; struct fw_rsc_devmem *d; - struct fw_rsc_trace *t; + struct fw_rsc_trace *t1; + struct fw_rsc_trace2 *t2; struct fw_rsc_vdev *v; int i, j; @@ -205,6 +206,7 @@ static int rproc_rsc_table_show(struct seq_file *seq, void *p) int offset = table->offset[i]; struct fw_rsc_hdr *hdr = (void *)table + offset; void *rsc = (void *)hdr + sizeof(*hdr); + u16 ver = hdr->st.v; switch (hdr->st.t) { case RSC_CARVEOUT: @@ -230,13 +232,32 @@ static int rproc_rsc_table_show(struct seq_file *seq, void *p) seq_printf(seq, " Name %s\n\n", d->name); break; case RSC_TRACE: - t = rsc; - seq_printf(seq, "Entry %d is of type %s\n", - i, types[hdr->st.t]); - seq_printf(seq, " Device Address 0x%x\n", t->da); - seq_printf(seq, " Length 0x%x Bytes\n", t->len); - seq_printf(seq, " Reserved (should be zero) [%d]\n", t->reserved); - seq_printf(seq, " Name %s\n\n", t->name); + if (ver == 0) { + t1 = rsc; + seq_printf(seq, "Entry %d is version %d of type %s\n", + i, ver, types[hdr->st.t]); + seq_printf(seq, " Device Address 0x%x\n", + t1->da); + seq_printf(seq, " Length 0x%x Bytes\n", + t1->len); + seq_printf(seq, " Reserved (should be zero) [%d]\n", + t1->reserved); + seq_printf(seq, " Name %s\n\n", t1->name); + } else if (ver == 1) { + t2 = rsc; + seq_printf(seq, "Entry %d is version %d of type %s\n", + i, ver, types[hdr->st.t]); + seq_printf(seq, " Device Address 0x%llx\n", + t2->da); + seq_printf(seq, " Length 0x%x Bytes\n", + t2->len); + seq_printf(seq, " Reserved (should be zero) [%d]\n", + t2->reserved); + seq_printf(seq, " Name %s\n\n", t2->name); + } else { + seq_printf(seq, "Entry %d is an unsupported version %d of type %s\n", + i, ver, types[hdr->st.t]); + } break; case RSC_VDEV: v = rsc; diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h index 526d3cb45e37..3b3bea42f8b1 100644 --- a/include/linux/remoteproc.h +++ b/include/linux/remoteproc.h @@ -243,6 +243,32 @@ struct fw_rsc_trace { u8 name[32]; } __packed; +/** + * struct fw_rsc_trace2 - trace buffer declaration supporting 64-bits + * @padding: initial padding after type field for aligned 64-bit access + * @da: device address (64-bit) + * @len: length (in bytes) + * @reserved: reserved (must be zero) + * @name: human-readable name of the trace buffer + * + * This resource entry is an enhanced version of the fw_rsc_trace resourec entry + * and the provides equivalent functionality but designed for 64-bit remote + * processors. + * + * @da specifies the device address of the buffer, @len specifies + * its size, and @name may contain a human readable name of the trace buffer. + * + * After booting the remote processor, the trace buffers are exposed to the + * user via debugfs entries (called trace0, trace1, etc..). + */ +struct fw_rsc_trace2 { + u32 padding; + u64 da; + u32 len; + u32 reserved; + u8 name[32]; +} __packed; + /** * struct fw_rsc_vdev_vring - vring descriptor entry * @da: device address -- 2.23.0