| Message ID | 1532697292-14272-17-git-send-email-loic.pallardy@st.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | remoteproc: add fixed memory region support | expand |
Hi Loic, On 7/27/18 8:14 AM, Loic Pallardy wrote: > ST remote processor needs some specified memory regions for > firmware and IPC. > Memory regions are defined as reserved memory and should > be registered in remoteproc core thanks to rproc_add_carveout > function before rproc_start. For this, st rproc driver implements > prepare ops. > > Signed-off-by: Loic Pallardy <loic.pallardy@st.com> > --- > drivers/remoteproc/st_remoteproc.c | 96 +++++++++++++++++++++++++++++++++----- > 1 file changed, 85 insertions(+), 11 deletions(-) > > diff --git a/drivers/remoteproc/st_remoteproc.c b/drivers/remoteproc/st_remoteproc.c > index aacef0e..45958d5 100644 > --- a/drivers/remoteproc/st_remoteproc.c > +++ b/drivers/remoteproc/st_remoteproc.c > @@ -19,6 +19,7 @@ > #include <linux/mfd/syscon.h> > #include <linux/module.h> > #include <linux/of.h> > +#include <linux/of_address.h> > #include <linux/of_device.h> > #include <linux/of_reserved_mem.h> > #include <linux/platform_device.h> > @@ -91,6 +92,82 @@ static void st_rproc_kick(struct rproc *rproc, int vqid) > dev_err(dev, "failed to send message via mbox: %d\n", ret); > } > > +static int st_rproc_mem_alloc(struct rproc *rproc, > + struct rproc_mem_entry *mem) > +{ > + struct device *dev = rproc->dev.parent; > + void *va; > + > + va = ioremap_wc(mem->dma, mem->len); > + if (!va) { > + dev_err(dev, "Unable to map memory region: %pa+%zx\n", > + &mem->dma, mem->len); > + return -ENOMEM; > + } > + > + /* Update memory entry va */ > + mem->va = va; > + > + return 0; > +} > + > +static int st_rproc_mem_release(struct rproc *rproc, > + struct rproc_mem_entry *mem) > +{ > + iounmap(mem->va); > + > + return 0; > +} > + > +static int st_rproc_parse_fw(struct rproc *rproc, const struct firmware *fw) > +{ > + struct device *dev = rproc->dev.parent; > + struct device_node *np = dev->of_node; > + struct rproc_mem_entry *mem; > + void *va; > + struct reserved_mem *rmem; > + struct of_phandle_iterator it; > + int err, index = 0; > + > + of_phandle_iterator_init(&it, np, "memory-region", NULL, 0); > + while ((err = of_phandle_iterator_next(&it)) == 0) { > + va = NULL; > + rmem = of_reserved_mem_lookup(it.node); > + > + /* No need to map vdev buffer */ > + if (strcmp(it.node->name, "vdev0buffer")) { > + va = devm_ioremap_wc(dev, rmem->base, rmem->size); > + if (!va) { > + dev_err(dev, "Unable to map memory region: %pa+%zx\n", > + &rmem->base, rmem->size); > + return -ENOMEM; > + } > + > + /* Register memory region */ > + mem = rproc_mem_entry_init(dev, va, > + (dma_addr_t)rmem->base, > + rmem->size, rmem->base, > + st_rproc_mem_alloc, > + st_rproc_mem_release, You seem to be double-mapping, first just above to supply the va to mem_entry_init and then through the alloc function. This is DT parsing and is fixed irrespective of firmware and only needs to be done once really in the platform driver probe. I think this whole logic is unnecessarily complicated in the name of letting the remoteproc core handle the alloc and free for fixed memory carveouts during every boot and shutdown, and having to redo the mapping everytime during the firmware parse. I am not a big fan of overloading the parse_fw to do this runtime remapping everytime for something that should have been done once. I think you have done this in your v2, and somewhere along in v3 got modified into this. regards Suman > + it.node->name); > + } else { > + /* Register reserved memory for vdev buffer allocation */ > + mem = rproc_of_resm_mem_entry_init(dev, index, > + rmem->size, > + rmem->base, > + it.node->name); > + } > + > + if (!mem) > + return -ENOMEM; > + > + rproc_add_carveout(rproc, mem); > + index++; > + } > + > + return rproc_elf_load_rsc_table(rproc, fw); > +} > + > static int st_rproc_start(struct rproc *rproc) > { > struct st_rproc *ddata = rproc->priv; > @@ -158,9 +235,14 @@ static int st_rproc_stop(struct rproc *rproc) > } > > static const struct rproc_ops st_rproc_ops = { > - .kick = st_rproc_kick, > - .start = st_rproc_start, > - .stop = st_rproc_stop, > + .kick = st_rproc_kick, > + .start = st_rproc_start, > + .stop = st_rproc_stop, > + .parse_fw = st_rproc_parse_fw, > + .load = rproc_elf_load_segments, > + .find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table, > + .sanity_check = rproc_elf_sanity_check, > + .get_boot_addr = rproc_elf_get_boot_addr, > }; > > /* > @@ -254,12 +336,6 @@ static int st_rproc_parse_dt(struct platform_device *pdev) > return -EINVAL; > } > > - err = of_reserved_mem_device_init(dev); > - if (err) { > - dev_err(dev, "Failed to obtain shared memory\n"); > - return err; > - } > - > err = clk_prepare(ddata->clk); > if (err) > dev_err(dev, "failed to get clock\n"); > @@ -387,8 +463,6 @@ static int st_rproc_remove(struct platform_device *pdev) > > clk_disable_unprepare(ddata->clk); > > - of_reserved_mem_device_release(&pdev->dev); > - > for (i = 0; i < ST_RPROC_MAX_VRING * MBOX_MAX; i++) > mbox_free_channel(ddata->mbox_chan[i]); > >
Hi Suman, > -----Original Message----- > From: Suman Anna <s-anna@ti.com> > Sent: mercredi 24 octobre 2018 05:02 > To: Loic PALLARDY <loic.pallardy@st.com>; bjorn.andersson@linaro.org; > ohad@wizery.com > Cc: linux-remoteproc@vger.kernel.org; linux-kernel@vger.kernel.org; > Arnaud POULIQUEN <arnaud.pouliquen@st.com>; > benjamin.gaignard@linaro.org > Subject: Re: [PATCH v4 16/17] remoteproc: st: add reserved memory support > > Hi Loic, > > On 7/27/18 8:14 AM, Loic Pallardy wrote: > > ST remote processor needs some specified memory regions for > > firmware and IPC. > > Memory regions are defined as reserved memory and should > > be registered in remoteproc core thanks to rproc_add_carveout > > function before rproc_start. For this, st rproc driver implements > > prepare ops. > > > > Signed-off-by: Loic Pallardy <loic.pallardy@st.com> > > --- > > drivers/remoteproc/st_remoteproc.c | 96 > +++++++++++++++++++++++++++++++++----- > > 1 file changed, 85 insertions(+), 11 deletions(-) > > > > diff --git a/drivers/remoteproc/st_remoteproc.c > b/drivers/remoteproc/st_remoteproc.c > > index aacef0e..45958d5 100644 > > --- a/drivers/remoteproc/st_remoteproc.c > > +++ b/drivers/remoteproc/st_remoteproc.c > > @@ -19,6 +19,7 @@ > > #include <linux/mfd/syscon.h> > > #include <linux/module.h> > > #include <linux/of.h> > > +#include <linux/of_address.h> > > #include <linux/of_device.h> > > #include <linux/of_reserved_mem.h> > > #include <linux/platform_device.h> > > @@ -91,6 +92,82 @@ static void st_rproc_kick(struct rproc *rproc, int vqid) > > dev_err(dev, "failed to send message via mbox: %d\n", ret); > > } > > > > +static int st_rproc_mem_alloc(struct rproc *rproc, > > + struct rproc_mem_entry *mem) > > +{ > > + struct device *dev = rproc->dev.parent; > > + void *va; > > + > > + va = ioremap_wc(mem->dma, mem->len); > > + if (!va) { > > + dev_err(dev, "Unable to map memory region: %pa+%zx\n", > > + &mem->dma, mem->len); > > + return -ENOMEM; > > + } > > + > > + /* Update memory entry va */ > > + mem->va = va; > > + > > + return 0; > > +} > > + > > +static int st_rproc_mem_release(struct rproc *rproc, > > + struct rproc_mem_entry *mem) > > +{ > > + iounmap(mem->va); > > + > > + return 0; > > +} > > + > > +static int st_rproc_parse_fw(struct rproc *rproc, const struct firmware > *fw) > > +{ > > + struct device *dev = rproc->dev.parent; > > + struct device_node *np = dev->of_node; > > + struct rproc_mem_entry *mem; > > + void *va; > > + struct reserved_mem *rmem; > > + struct of_phandle_iterator it; > > + int err, index = 0; > > + > > + of_phandle_iterator_init(&it, np, "memory-region", NULL, 0); > > + while ((err = of_phandle_iterator_next(&it)) == 0) { > > + va = NULL; > > + rmem = of_reserved_mem_lookup(it.node); > > + > > + /* No need to map vdev buffer */ > > + if (strcmp(it.node->name, "vdev0buffer")) { > > + va = devm_ioremap_wc(dev, rmem->base, rmem- > >size); > > + if (!va) { > > + dev_err(dev, "Unable to map memory > region: %pa+%zx\n", > > + &rmem->base, rmem->size); > > + return -ENOMEM; > > + } > > + > > + /* Register memory region */ > > + mem = rproc_mem_entry_init(dev, va, > > + (dma_addr_t)rmem->base, > > + rmem->size, rmem->base, > > + st_rproc_mem_alloc, > > + st_rproc_mem_release, > > You seem to be double-mapping, first just above to supply the va to > mem_entry_init and then through the alloc function. > > This is DT parsing and is fixed irrespective of firmware and only needs > to be done once really in the platform driver probe. I think this whole > logic is unnecessarily complicated in the name of letting the remoteproc > core handle the alloc and free for fixed memory carveouts during every > boot and shutdown, and having to redo the mapping everytime during the > firmware parse. I am not a big fan of overloading the parse_fw to do > this runtime remapping everytime for something that should have been > done once. I think you have done this in your v2, and somewhere along in > v3 got modified into this. Double mapping is definitively an error. Forget it. Being able to allocate all carveouts at coprocessor start was a remark from Bjorn. That's why I introduced alloc and free ops to do the allocation at each coprocessor start and so st_rproc_mem_alloc() in this driver. Regards, Loic > > regards > Suman > > > + it.node->name); > > + } else { > > + /* Register reserved memory for vdev buffer > allocation */ > > + mem = rproc_of_resm_mem_entry_init(dev, index, > > + rmem->size, > > + rmem->base, > > + it.node->name); > > + } > > + > > + if (!mem) > > + return -ENOMEM; > > + > > + rproc_add_carveout(rproc, mem); > > + index++; > > + } > > + > > + return rproc_elf_load_rsc_table(rproc, fw); > > +} > > + > > static int st_rproc_start(struct rproc *rproc) > > { > > struct st_rproc *ddata = rproc->priv; > > @@ -158,9 +235,14 @@ static int st_rproc_stop(struct rproc *rproc) > > } > > > > static const struct rproc_ops st_rproc_ops = { > > - .kick = st_rproc_kick, > > - .start = st_rproc_start, > > - .stop = st_rproc_stop, > > + .kick = st_rproc_kick, > > + .start = st_rproc_start, > > + .stop = st_rproc_stop, > > + .parse_fw = st_rproc_parse_fw, > > + .load = rproc_elf_load_segments, > > + .find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table, > > + .sanity_check = rproc_elf_sanity_check, > > + .get_boot_addr = rproc_elf_get_boot_addr, > > }; > > > > /* > > @@ -254,12 +336,6 @@ static int st_rproc_parse_dt(struct > platform_device *pdev) > > return -EINVAL; > > } > > > > - err = of_reserved_mem_device_init(dev); > > - if (err) { > > - dev_err(dev, "Failed to obtain shared memory\n"); > > - return err; > > - } > > - > > err = clk_prepare(ddata->clk); > > if (err) > > dev_err(dev, "failed to get clock\n"); > > @@ -387,8 +463,6 @@ static int st_rproc_remove(struct platform_device > *pdev) > > > > clk_disable_unprepare(ddata->clk); > > > > - of_reserved_mem_device_release(&pdev->dev); > > - > > for (i = 0; i < ST_RPROC_MAX_VRING * MBOX_MAX; i++) > > mbox_free_channel(ddata->mbox_chan[i]); > > > >
diff --git a/drivers/remoteproc/st_remoteproc.c b/drivers/remoteproc/st_remoteproc.c index aacef0e..45958d5 100644 --- a/drivers/remoteproc/st_remoteproc.c +++ b/drivers/remoteproc/st_remoteproc.c @@ -19,6 +19,7 @@ #include <linux/mfd/syscon.h> #include <linux/module.h> #include <linux/of.h> +#include <linux/of_address.h> #include <linux/of_device.h> #include <linux/of_reserved_mem.h> #include <linux/platform_device.h> @@ -91,6 +92,82 @@ static void st_rproc_kick(struct rproc *rproc, int vqid) dev_err(dev, "failed to send message via mbox: %d\n", ret); } +static int st_rproc_mem_alloc(struct rproc *rproc, + struct rproc_mem_entry *mem) +{ + struct device *dev = rproc->dev.parent; + void *va; + + va = ioremap_wc(mem->dma, mem->len); + if (!va) { + dev_err(dev, "Unable to map memory region: %pa+%zx\n", + &mem->dma, mem->len); + return -ENOMEM; + } + + /* Update memory entry va */ + mem->va = va; + + return 0; +} + +static int st_rproc_mem_release(struct rproc *rproc, + struct rproc_mem_entry *mem) +{ + iounmap(mem->va); + + return 0; +} + +static int st_rproc_parse_fw(struct rproc *rproc, const struct firmware *fw) +{ + struct device *dev = rproc->dev.parent; + struct device_node *np = dev->of_node; + struct rproc_mem_entry *mem; + void *va; + struct reserved_mem *rmem; + struct of_phandle_iterator it; + int err, index = 0; + + of_phandle_iterator_init(&it, np, "memory-region", NULL, 0); + while ((err = of_phandle_iterator_next(&it)) == 0) { + va = NULL; + rmem = of_reserved_mem_lookup(it.node); + + /* No need to map vdev buffer */ + if (strcmp(it.node->name, "vdev0buffer")) { + va = devm_ioremap_wc(dev, rmem->base, rmem->size); + if (!va) { + dev_err(dev, "Unable to map memory region: %pa+%zx\n", + &rmem->base, rmem->size); + return -ENOMEM; + } + + /* Register memory region */ + mem = rproc_mem_entry_init(dev, va, + (dma_addr_t)rmem->base, + rmem->size, rmem->base, + st_rproc_mem_alloc, + st_rproc_mem_release, + it.node->name); + } else { + /* Register reserved memory for vdev buffer allocation */ + mem = rproc_of_resm_mem_entry_init(dev, index, + rmem->size, + rmem->base, + it.node->name); + } + + if (!mem) + return -ENOMEM; + + rproc_add_carveout(rproc, mem); + index++; + } + + return rproc_elf_load_rsc_table(rproc, fw); +} + static int st_rproc_start(struct rproc *rproc) { struct st_rproc *ddata = rproc->priv; @@ -158,9 +235,14 @@ static int st_rproc_stop(struct rproc *rproc) } static const struct rproc_ops st_rproc_ops = { - .kick = st_rproc_kick, - .start = st_rproc_start, - .stop = st_rproc_stop, + .kick = st_rproc_kick, + .start = st_rproc_start, + .stop = st_rproc_stop, + .parse_fw = st_rproc_parse_fw, + .load = rproc_elf_load_segments, + .find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table, + .sanity_check = rproc_elf_sanity_check, + .get_boot_addr = rproc_elf_get_boot_addr, }; /* @@ -254,12 +336,6 @@ static int st_rproc_parse_dt(struct platform_device *pdev) return -EINVAL; } - err = of_reserved_mem_device_init(dev); - if (err) { - dev_err(dev, "Failed to obtain shared memory\n"); - return err; - } - err = clk_prepare(ddata->clk); if (err) dev_err(dev, "failed to get clock\n"); @@ -387,8 +463,6 @@ static int st_rproc_remove(struct platform_device *pdev) clk_disable_unprepare(ddata->clk); - of_reserved_mem_device_release(&pdev->dev); - for (i = 0; i < ST_RPROC_MAX_VRING * MBOX_MAX; i++) mbox_free_channel(ddata->mbox_chan[i]);
ST remote processor needs some specified memory regions for firmware and IPC. Memory regions are defined as reserved memory and should be registered in remoteproc core thanks to rproc_add_carveout function before rproc_start. For this, st rproc driver implements prepare ops. Signed-off-by: Loic Pallardy <loic.pallardy@st.com> --- drivers/remoteproc/st_remoteproc.c | 96 +++++++++++++++++++++++++++++++++----- 1 file changed, 85 insertions(+), 11 deletions(-)