| Message ID | 1532697292-14272-3-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, Bjorn, On 7/27/18 8:14 AM, Loic Pallardy wrote: > This new function translates CPU virtual address in > CPU physical one according to virtual address location. > > Signed-off-by: Loic Pallardy <loic.pallardy@st.com> > Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org> > --- > drivers/remoteproc/remoteproc_core.c | 18 +++++++++++++++++- > 1 file changed, 17 insertions(+), 1 deletion(-) > > diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c > index 437fabf..8e5fe1e 100644 > --- a/drivers/remoteproc/remoteproc_core.c > +++ b/drivers/remoteproc/remoteproc_core.c > @@ -140,6 +140,22 @@ static void rproc_disable_iommu(struct rproc *rproc) > iommu_domain_free(domain); > } > > +static phys_addr_t rproc_va_to_pa(void *cpu_addr) > +{ > + /* > + * Return physical address according to virtual address location > + * - in vmalloc: if region ioremapped or defined as dma_alloc_coherent > + * - in kernel: if region allocated in generic dma memory pool > + */ > + if (is_vmalloc_addr(cpu_addr)) { > + return page_to_phys(vmalloc_to_page(cpu_addr)) + > + offset_in_page(cpu_addr); > + } > + > + WARN_ON(!virt_addr_valid(cpu_addr)); > + return virt_to_phys(cpu_addr); > +} > + > /** > * rproc_da_to_va() - lookup the kernel virtual address for a remoteproc address > * @rproc: handle of a remote processor > @@ -711,7 +727,7 @@ static int rproc_handle_carveout(struct rproc *rproc, > * In this case, the device address and the physical address > * are the same. > */ > - rsc->pa = dma; > + rsc->pa = (u32)rproc_va_to_pa(va); While I agree with the direction here, we ought to add a check here warning users if some address bits are getting lost as a result of the typecast. Granted the issue may have been present previously with dma_addr_t as well, but most platforms were using 32-bit dma addresses, so this was kinda masked. There are ARMv7 platforms with LPAE enabled allowing physical addresses > 32-bits. In anycase, we definitely have a need for a v2 for the fw_rsc_carveout structure to deal with 64-bit addresses. regards Suman > > carveout->va = va; > carveout->len = rsc->len; >
Hi Suman, > -----Original Message----- > From: Suman Anna <s-anna@ti.com> > Sent: mardi 23 octobre 2018 18:51 > 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 02/17] remoteproc: add rproc_va_to_pa function > > Hi Loic, Bjorn, > > On 7/27/18 8:14 AM, Loic Pallardy wrote: > > This new function translates CPU virtual address in > > CPU physical one according to virtual address location. > > > > Signed-off-by: Loic Pallardy <loic.pallardy@st.com> > > Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org> > > --- > > drivers/remoteproc/remoteproc_core.c | 18 +++++++++++++++++- > > 1 file changed, 17 insertions(+), 1 deletion(-) > > > > diff --git a/drivers/remoteproc/remoteproc_core.c > b/drivers/remoteproc/remoteproc_core.c > > index 437fabf..8e5fe1e 100644 > > --- a/drivers/remoteproc/remoteproc_core.c > > +++ b/drivers/remoteproc/remoteproc_core.c > > @@ -140,6 +140,22 @@ static void rproc_disable_iommu(struct rproc > *rproc) > > iommu_domain_free(domain); > > } > > > > +static phys_addr_t rproc_va_to_pa(void *cpu_addr) > > +{ > > + /* > > + * Return physical address according to virtual address location > > + * - in vmalloc: if region ioremapped or defined as > dma_alloc_coherent > > + * - in kernel: if region allocated in generic dma memory pool > > + */ > > + if (is_vmalloc_addr(cpu_addr)) { > > + return page_to_phys(vmalloc_to_page(cpu_addr)) + > > + offset_in_page(cpu_addr); > > + } > > + > > + WARN_ON(!virt_addr_valid(cpu_addr)); > > + return virt_to_phys(cpu_addr); > > +} > > + > > /** > > * rproc_da_to_va() - lookup the kernel virtual address for a remoteproc > address > > * @rproc: handle of a remote processor > > @@ -711,7 +727,7 @@ static int rproc_handle_carveout(struct rproc > *rproc, > > * In this case, the device address and the physical address > > * are the same. > > */ > > - rsc->pa = dma; > > + rsc->pa = (u32)rproc_va_to_pa(va); > > While I agree with the direction here, we ought to add a check here > warning users if some address bits are getting lost as a result of the > typecast. Granted the issue may have been present previously with > dma_addr_t as well, but most platforms were using 32-bit dma addresses, > so this was kinda masked. There are ARMv7 platforms with LPAE enabled > allowing physical addresses > 32-bits. > > In anycase, we definitely have a need for a v2 for the fw_rsc_carveout > structure to deal with 64-bit addresses. > Agree with you. Assumption for this series was to keep resource table as it is. Resource table improvement is planned in a second step. Regards, Loic > regards > Suman > > > > > carveout->va = va; > > carveout->len = rsc->len; > >
On 10/23/18 2:51 PM, Loic PALLARDY wrote: > Hi Suman, > >> -----Original Message----- >> From: Suman Anna <s-anna@ti.com> >> Sent: mardi 23 octobre 2018 18:51 >> 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 02/17] remoteproc: add rproc_va_to_pa function >> >> Hi Loic, Bjorn, >> >> On 7/27/18 8:14 AM, Loic Pallardy wrote: >>> This new function translates CPU virtual address in >>> CPU physical one according to virtual address location. >>> >>> Signed-off-by: Loic Pallardy <loic.pallardy@st.com> >>> Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org> >>> --- >>> drivers/remoteproc/remoteproc_core.c | 18 +++++++++++++++++- >>> 1 file changed, 17 insertions(+), 1 deletion(-) >>> >>> diff --git a/drivers/remoteproc/remoteproc_core.c >> b/drivers/remoteproc/remoteproc_core.c >>> index 437fabf..8e5fe1e 100644 >>> --- a/drivers/remoteproc/remoteproc_core.c >>> +++ b/drivers/remoteproc/remoteproc_core.c >>> @@ -140,6 +140,22 @@ static void rproc_disable_iommu(struct rproc >> *rproc) >>> iommu_domain_free(domain); >>> } >>> >>> +static phys_addr_t rproc_va_to_pa(void *cpu_addr) >>> +{ >>> + /* >>> + * Return physical address according to virtual address location >>> + * - in vmalloc: if region ioremapped or defined as >> dma_alloc_coherent >>> + * - in kernel: if region allocated in generic dma memory pool >>> + */ >>> + if (is_vmalloc_addr(cpu_addr)) { >>> + return page_to_phys(vmalloc_to_page(cpu_addr)) + >>> + offset_in_page(cpu_addr); >>> + } >>> + >>> + WARN_ON(!virt_addr_valid(cpu_addr)); >>> + return virt_to_phys(cpu_addr); >>> +} >>> + >>> /** >>> * rproc_da_to_va() - lookup the kernel virtual address for a remoteproc >> address >>> * @rproc: handle of a remote processor >>> @@ -711,7 +727,7 @@ static int rproc_handle_carveout(struct rproc >> *rproc, >>> * In this case, the device address and the physical address >>> * are the same. >>> */ >>> - rsc->pa = dma; >>> + rsc->pa = (u32)rproc_va_to_pa(va); >> >> While I agree with the direction here, we ought to add a check here >> warning users if some address bits are getting lost as a result of the >> typecast. Granted the issue may have been present previously with >> dma_addr_t as well, but most platforms were using 32-bit dma addresses, >> so this was kinda masked. There are ARMv7 platforms with LPAE enabled >> allowing physical addresses > 32-bits. >> >> In anycase, we definitely have a need for a v2 for the fw_rsc_carveout >> structure to deal with 64-bit addresses. >> > > Agree with you. > Assumption for this series was to keep resource table as it is. Resource table improvement is planned in a second step. Perhaps, we should add a WARN_ON for the time being until we enhance the resource table for 64-bit platforms/addresses. regards Suman > Regards, > Loic > >> regards >> Suman >> >>> >>> carveout->va = va; >>> carveout->len = rsc->len; >>> >
> -----Original Message----- > From: Suman Anna <s-anna@ti.com> > Sent: mercredi 24 octobre 2018 05:19 > 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 02/17] remoteproc: add rproc_va_to_pa function > > On 10/23/18 2:51 PM, Loic PALLARDY wrote: > > Hi Suman, > > > >> -----Original Message----- > >> From: Suman Anna <s-anna@ti.com> > >> Sent: mardi 23 octobre 2018 18:51 > >> 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 02/17] remoteproc: add rproc_va_to_pa function > >> > >> Hi Loic, Bjorn, > >> > >> On 7/27/18 8:14 AM, Loic Pallardy wrote: > >>> This new function translates CPU virtual address in > >>> CPU physical one according to virtual address location. > >>> > >>> Signed-off-by: Loic Pallardy <loic.pallardy@st.com> > >>> Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org> > >>> --- > >>> drivers/remoteproc/remoteproc_core.c | 18 +++++++++++++++++- > >>> 1 file changed, 17 insertions(+), 1 deletion(-) > >>> > >>> diff --git a/drivers/remoteproc/remoteproc_core.c > >> b/drivers/remoteproc/remoteproc_core.c > >>> index 437fabf..8e5fe1e 100644 > >>> --- a/drivers/remoteproc/remoteproc_core.c > >>> +++ b/drivers/remoteproc/remoteproc_core.c > >>> @@ -140,6 +140,22 @@ static void rproc_disable_iommu(struct rproc > >> *rproc) > >>> iommu_domain_free(domain); > >>> } > >>> > >>> +static phys_addr_t rproc_va_to_pa(void *cpu_addr) > >>> +{ > >>> + /* > >>> + * Return physical address according to virtual address location > >>> + * - in vmalloc: if region ioremapped or defined as > >> dma_alloc_coherent > >>> + * - in kernel: if region allocated in generic dma memory pool > >>> + */ > >>> + if (is_vmalloc_addr(cpu_addr)) { > >>> + return page_to_phys(vmalloc_to_page(cpu_addr)) + > >>> + offset_in_page(cpu_addr); > >>> + } > >>> + > >>> + WARN_ON(!virt_addr_valid(cpu_addr)); > >>> + return virt_to_phys(cpu_addr); > >>> +} > >>> + > >>> /** > >>> * rproc_da_to_va() - lookup the kernel virtual address for a remoteproc > >> address > >>> * @rproc: handle of a remote processor > >>> @@ -711,7 +727,7 @@ static int rproc_handle_carveout(struct rproc > >> *rproc, > >>> * In this case, the device address and the physical address > >>> * are the same. > >>> */ > >>> - rsc->pa = dma; > >>> + rsc->pa = (u32)rproc_va_to_pa(va); > >> > >> While I agree with the direction here, we ought to add a check here > >> warning users if some address bits are getting lost as a result of the > >> typecast. Granted the issue may have been present previously with > >> dma_addr_t as well, but most platforms were using 32-bit dma addresses, > >> so this was kinda masked. There are ARMv7 platforms with LPAE enabled > >> allowing physical addresses > 32-bits. > >> > >> In anycase, we definitely have a need for a v2 for the fw_rsc_carveout > >> structure to deal with 64-bit addresses. > >> > > > > Agree with you. > > Assumption for this series was to keep resource table as it is. Resource > table improvement is planned in a second step. > > Perhaps, we should add a WARN_ON for the time being until we enhance > the > resource table for 64-bit platforms/addresses. OK I will propose a patch to add WARN_ON on cast applied on resource table field Regards, Loic > > regards > Suman > > > Regards, > > Loic > > > >> regards > >> Suman > >> > >>> > >>> carveout->va = va; > >>> carveout->len = rsc->len; > >>> > >
On 10/24/18 7:58 AM, Loic PALLARDY wrote: > > >> -----Original Message----- >> From: Suman Anna <s-anna@ti.com> >> Sent: mercredi 24 octobre 2018 05:19 >> 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 02/17] remoteproc: add rproc_va_to_pa function >> >> On 10/23/18 2:51 PM, Loic PALLARDY wrote: >>> Hi Suman, >>> >>>> -----Original Message----- >>>> From: Suman Anna <s-anna@ti.com> >>>> Sent: mardi 23 octobre 2018 18:51 >>>> 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 02/17] remoteproc: add rproc_va_to_pa function >>>> >>>> Hi Loic, Bjorn, >>>> >>>> On 7/27/18 8:14 AM, Loic Pallardy wrote: >>>>> This new function translates CPU virtual address in >>>>> CPU physical one according to virtual address location. >>>>> >>>>> Signed-off-by: Loic Pallardy <loic.pallardy@st.com> >>>>> Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org> >>>>> --- >>>>> drivers/remoteproc/remoteproc_core.c | 18 +++++++++++++++++- >>>>> 1 file changed, 17 insertions(+), 1 deletion(-) >>>>> >>>>> diff --git a/drivers/remoteproc/remoteproc_core.c >>>> b/drivers/remoteproc/remoteproc_core.c >>>>> index 437fabf..8e5fe1e 100644 >>>>> --- a/drivers/remoteproc/remoteproc_core.c >>>>> +++ b/drivers/remoteproc/remoteproc_core.c >>>>> @@ -140,6 +140,22 @@ static void rproc_disable_iommu(struct rproc >>>> *rproc) >>>>> iommu_domain_free(domain); >>>>> } >>>>> >>>>> +static phys_addr_t rproc_va_to_pa(void *cpu_addr) >>>>> +{ >>>>> + /* >>>>> + * Return physical address according to virtual address location >>>>> + * - in vmalloc: if region ioremapped or defined as >>>> dma_alloc_coherent >>>>> + * - in kernel: if region allocated in generic dma memory pool >>>>> + */ >>>>> + if (is_vmalloc_addr(cpu_addr)) { >>>>> + return page_to_phys(vmalloc_to_page(cpu_addr)) + >>>>> + offset_in_page(cpu_addr); >>>>> + } >>>>> + >>>>> + WARN_ON(!virt_addr_valid(cpu_addr)); >>>>> + return virt_to_phys(cpu_addr); >>>>> +} >>>>> + >>>>> /** >>>>> * rproc_da_to_va() - lookup the kernel virtual address for a remoteproc >>>> address >>>>> * @rproc: handle of a remote processor >>>>> @@ -711,7 +727,7 @@ static int rproc_handle_carveout(struct rproc >>>> *rproc, >>>>> * In this case, the device address and the physical address >>>>> * are the same. >>>>> */ >>>>> - rsc->pa = dma; >>>>> + rsc->pa = (u32)rproc_va_to_pa(va); >>>> >>>> While I agree with the direction here, we ought to add a check here >>>> warning users if some address bits are getting lost as a result of the >>>> typecast. Granted the issue may have been present previously with >>>> dma_addr_t as well, but most platforms were using 32-bit dma addresses, >>>> so this was kinda masked. There are ARMv7 platforms with LPAE enabled >>>> allowing physical addresses > 32-bits. >>>> >>>> In anycase, we definitely have a need for a v2 for the fw_rsc_carveout >>>> structure to deal with 64-bit addresses. >>>> >>> >>> Agree with you. >>> Assumption for this series was to keep resource table as it is. Resource >> table improvement is planned in a second step. >> >> Perhaps, we should add a WARN_ON for the time being until we enhance >> the >> resource table for 64-bit platforms/addresses. > > OK I will propose a patch to add WARN_ON on cast applied on resource table field Yes, thanks. regards Suman > Regards, > Loic >> >> regards >> Suman >> >>> Regards, >>> Loic >>> >>>> regards >>>> Suman >>>> >>>>> >>>>> carveout->va = va; >>>>> carveout->len = rsc->len; >>>>> >>> >
diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c index 437fabf..8e5fe1e 100644 --- a/drivers/remoteproc/remoteproc_core.c +++ b/drivers/remoteproc/remoteproc_core.c @@ -140,6 +140,22 @@ static void rproc_disable_iommu(struct rproc *rproc) iommu_domain_free(domain); } +static phys_addr_t rproc_va_to_pa(void *cpu_addr) +{ + /* + * Return physical address according to virtual address location + * - in vmalloc: if region ioremapped or defined as dma_alloc_coherent + * - in kernel: if region allocated in generic dma memory pool + */ + if (is_vmalloc_addr(cpu_addr)) { + return page_to_phys(vmalloc_to_page(cpu_addr)) + + offset_in_page(cpu_addr); + } + + WARN_ON(!virt_addr_valid(cpu_addr)); + return virt_to_phys(cpu_addr); +} + /** * rproc_da_to_va() - lookup the kernel virtual address for a remoteproc address * @rproc: handle of a remote processor @@ -711,7 +727,7 @@ static int rproc_handle_carveout(struct rproc *rproc, * In this case, the device address and the physical address * are the same. */ - rsc->pa = dma; + rsc->pa = (u32)rproc_va_to_pa(va); carveout->va = va; carveout->len = rsc->len;