From: Rob Clark <robdclark@gmail.com>
To: Jonathan Marek <jonathan@marek.ca>
Cc: David Airlie <airlied@linux.ie>,
freedreno <freedreno@lists.freedesktop.org>,
Sharat Masetty <smasetty@codeaurora.org>,
open list <linux-kernel@vger.kernel.org>,
"open list:DRM DRIVER FOR MSM ADRENO GPU"
<dri-devel@lists.freedesktop.org>,
Bjorn Andersson <bjorn.andersson@linaro.org>,
"Michael J. Ruhl" <michael.j.ruhl@intel.com>,
"open list:DRM DRIVER FOR MSM ADRENO GPU"
<linux-arm-msm@vger.kernel.org>,
Stephen Boyd <swboyd@chromium.org>, Sean Paul <sean@poorly.run>
Subject: Re: [PATCH 2/9] Revert "drm/msm/a6xx: Use the DMA API for GMU memory objects"
Date: Mon, 20 Apr 2020 14:16:21 -0700 [thread overview]
Message-ID: <CAF6AEGscSfS58d4gYVPUsC5Y2j8TmY5zj2kZRGz7y_hfja-xLQ@mail.gmail.com> (raw)
In-Reply-To: <46fe8a96-c54e-2362-9a60-c27f7042089b@marek.ca>
On Mon, Apr 20, 2020 at 12:59 PM Jonathan Marek <jonathan@marek.ca> wrote:
>
> On 4/20/20 3:51 PM, Bjorn Andersson wrote:
> > On Mon 20 Apr 07:03 PDT 2020, Jonathan Marek wrote:
> >
> >> This reverts commit a5fb8b918920c6f7706a8b5b8ea535a7f077a7f6.
> >
> > Why?
> >
>
> It removes something I need for the next patches in the series, however
> I'm open to suggestions on a better solution (Jordan said he would check
> it out)
when you repost (if we end up keeping this approach), please add a
description of the reason in the commit msg of the revert.. it makes
it easier to review and less confusing in git history
BR,
-R
> >> ---
> >> drivers/gpu/drm/msm/adreno/a6xx_gmu.c | 115 +++++++++++++++++++++++---
> >> drivers/gpu/drm/msm/adreno/a6xx_gmu.h | 6 +-
> >> 2 files changed, 107 insertions(+), 14 deletions(-)
> >>
> >> diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
> >> index c4e71abbdd53..748cd379065f 100644
> >> --- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
> >> +++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
> >> @@ -2,7 +2,6 @@
> >> /* Copyright (c) 2017-2019 The Linux Foundation. All rights reserved. */
> >>
> >> #include <linux/clk.h>
> >> -#include <linux/dma-mapping.h>
> >> #include <linux/interconnect.h>
> >> #include <linux/pm_domain.h>
> >> #include <linux/pm_opp.h>
> >> @@ -921,10 +920,21 @@ int a6xx_gmu_stop(struct a6xx_gpu *a6xx_gpu)
> >>
> >> static void a6xx_gmu_memory_free(struct a6xx_gmu *gmu, struct a6xx_gmu_bo *bo)
> >> {
> >> + int count, i;
> >> + u64 iova;
> >> +
> >> if (IS_ERR_OR_NULL(bo))
> >> return;
> >>
> >> - dma_free_wc(gmu->dev, bo->size, bo->virt, bo->iova);
> >> + count = bo->size >> PAGE_SHIFT;
> >> + iova = bo->iova;
> >> +
> >> + for (i = 0; i < count; i++, iova += PAGE_SIZE) {
> >> + iommu_unmap(gmu->domain, iova, PAGE_SIZE);
> >> + __free_pages(bo->pages[i], 0);
> >> + }
> >> +
> >> + kfree(bo->pages);
> >> kfree(bo);
> >> }
> >>
> >> @@ -932,6 +942,7 @@ static struct a6xx_gmu_bo *a6xx_gmu_memory_alloc(struct a6xx_gmu *gmu,
> >> size_t size)
> >> {
> >> struct a6xx_gmu_bo *bo;
> >> + int ret, count, i;
> >>
> >> bo = kzalloc(sizeof(*bo), GFP_KERNEL);
> >> if (!bo)
> >> @@ -939,14 +950,86 @@ static struct a6xx_gmu_bo *a6xx_gmu_memory_alloc(struct a6xx_gmu *gmu,
> >>
> >> bo->size = PAGE_ALIGN(size);
> >>
> >> - bo->virt = dma_alloc_wc(gmu->dev, bo->size, &bo->iova, GFP_KERNEL);
> >> + count = bo->size >> PAGE_SHIFT;
> >>
> >> - if (!bo->virt) {
> >> + bo->pages = kcalloc(count, sizeof(struct page *), GFP_KERNEL);
> >> + if (!bo->pages) {
> >> kfree(bo);
> >> return ERR_PTR(-ENOMEM);
> >> }
> >>
> >> + for (i = 0; i < count; i++) {
> >> + bo->pages[i] = alloc_page(GFP_KERNEL);
> >> + if (!bo->pages[i])
> >> + goto err;
> >> + }
> >> +
> >> + bo->iova = gmu->uncached_iova_base;
> >> +
> >> + for (i = 0; i < count; i++) {
> >> + ret = iommu_map(gmu->domain,
> >> + bo->iova + (PAGE_SIZE * i),
> >> + page_to_phys(bo->pages[i]), PAGE_SIZE,
> >> + IOMMU_READ | IOMMU_WRITE);
> >> +
> >> + if (ret) {
> >> + DRM_DEV_ERROR(gmu->dev, "Unable to map GMU buffer object\n");
> >> +
> >> + for (i = i - 1 ; i >= 0; i--)
> >> + iommu_unmap(gmu->domain,
> >> + bo->iova + (PAGE_SIZE * i),
> >> + PAGE_SIZE);
> >> +
> >> + goto err;
> >> + }
> >> + }
> >> +
> >> + bo->virt = vmap(bo->pages, count, VM_IOREMAP,
> >> + pgprot_writecombine(PAGE_KERNEL));
> >> + if (!bo->virt)
> >> + goto err;
> >> +
> >> + /* Align future IOVA addresses on 1MB boundaries */
> >> + gmu->uncached_iova_base += ALIGN(size, SZ_1M);
> >> +
> >> return bo;
> >> +
> >> +err:
> >> + for (i = 0; i < count; i++) {
> >> + if (bo->pages[i])
> >> + __free_pages(bo->pages[i], 0);
> >> + }
> >> +
> >> + kfree(bo->pages);
> >> + kfree(bo);
> >> +
> >> + return ERR_PTR(-ENOMEM);
> >> +}
> >> +
> >> +static int a6xx_gmu_memory_probe(struct a6xx_gmu *gmu)
> >> +{
> >> + int ret;
> >> +
> >> + /*
> >> + * The GMU address space is hardcoded to treat the range
> >> + * 0x60000000 - 0x80000000 as un-cached memory. All buffers shared
> >> + * between the GMU and the CPU will live in this space
> >> + */
> >> + gmu->uncached_iova_base = 0x60000000;
> >> +
> >> +
> >> + gmu->domain = iommu_domain_alloc(&platform_bus_type);
> >> + if (!gmu->domain)
> >> + return -ENODEV;
> >> +
> >> + ret = iommu_attach_device(gmu->domain, gmu->dev);
> >> +
> >> + if (ret) {
> >> + iommu_domain_free(gmu->domain);
> >> + gmu->domain = NULL;
> >> + }
> >> +
> >> + return ret;
> >> }
> >>
> >> /* Return the 'arc-level' for the given frequency */
> >> @@ -1206,6 +1289,10 @@ void a6xx_gmu_remove(struct a6xx_gpu *a6xx_gpu)
> >>
> >> a6xx_gmu_memory_free(gmu, gmu->hfi);
> >>
> >> + iommu_detach_device(gmu->domain, gmu->dev);
> >> +
> >> + iommu_domain_free(gmu->domain);
> >> +
> >> free_irq(gmu->gmu_irq, gmu);
> >> free_irq(gmu->hfi_irq, gmu);
> >>
> >> @@ -1226,15 +1313,7 @@ int a6xx_gmu_init(struct a6xx_gpu *a6xx_gpu, struct device_node *node)
> >>
> >> gmu->dev = &pdev->dev;
> >>
> >> - /* Pass force_dma false to require the DT to set the dma region */
> >> - ret = of_dma_configure(gmu->dev, node, false);
> >> - if (ret)
> >> - return ret;
> >> -
> >> - /* Set the mask after the of_dma_configure() */
> >> - ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(31));
> >> - if (ret)
> >> - return ret;
> >> + of_dma_configure(gmu->dev, node, true);
> >>
> >> /* Fow now, don't do anything fancy until we get our feet under us */
> >> gmu->idle_level = GMU_IDLE_STATE_ACTIVE;
> >> @@ -1246,6 +1325,11 @@ int a6xx_gmu_init(struct a6xx_gpu *a6xx_gpu, struct device_node *node)
> >> if (ret)
> >> goto err_put_device;
> >>
> >> + /* Set up the IOMMU context bank */
> >> + ret = a6xx_gmu_memory_probe(gmu);
> >> + if (ret)
> >> + goto err_put_device;
> >> +
> >> /* Allocate memory for for the HFI queues */
> >> gmu->hfi = a6xx_gmu_memory_alloc(gmu, SZ_16K);
> >> if (IS_ERR(gmu->hfi))
> >> @@ -1291,6 +1375,11 @@ int a6xx_gmu_init(struct a6xx_gpu *a6xx_gpu, struct device_node *node)
> >> err_memory:
> >> a6xx_gmu_memory_free(gmu, gmu->hfi);
> >>
> >> + if (gmu->domain) {
> >> + iommu_detach_device(gmu->domain, gmu->dev);
> >> +
> >> + iommu_domain_free(gmu->domain);
> >> + }
> >> ret = -ENODEV;
> >>
> >> err_put_device:
> >> diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.h b/drivers/gpu/drm/msm/adreno/a6xx_gmu.h
> >> index 4af65a36d5ca..2af91ed7ed0c 100644
> >> --- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.h
> >> +++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.h
> >> @@ -12,7 +12,8 @@
> >> struct a6xx_gmu_bo {
> >> void *virt;
> >> size_t size;
> >> - dma_addr_t iova;
> >> + u64 iova;
> >> + struct page **pages;
> >> };
> >>
> >> /*
> >> @@ -48,6 +49,9 @@ struct a6xx_gmu {
> >> int hfi_irq;
> >> int gmu_irq;
> >>
> >> + struct iommu_domain *domain;
> >> + u64 uncached_iova_base;
> >> +
> >> struct device *gxpd;
> >>
> >> int idle_level;
> >> --
> >> 2.26.1
> >>
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
next prev parent reply other threads:[~2020-04-20 21:16 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20200420140313.7263-1-jonathan@marek.ca>
2020-04-20 14:03 ` [PATCH 1/9] drm/msm/adreno: add A640/A650 to gpulist Jonathan Marek
2020-04-20 14:30 ` Greg Kroah-Hartman
2020-04-20 14:03 ` [PATCH 2/9] Revert "drm/msm/a6xx: Use the DMA API for GMU memory objects" Jonathan Marek
2020-04-20 19:51 ` Bjorn Andersson
2020-04-20 19:59 ` Jonathan Marek
2020-04-20 21:16 ` Rob Clark [this message]
2020-04-20 14:03 ` [PATCH 3/9] drm/msm/a6xx: allow allocating GMU memory with a fixed address Jonathan Marek
2020-04-20 14:03 ` [PATCH 4/9] drm/msm/a6xx: HFI v2 for A640 and A650 Jonathan Marek
2020-04-21 16:30 ` Jordan Crouse
2020-04-21 16:52 ` Jonathan Marek
2020-04-20 14:03 ` [PATCH 5/9] drm/msm/a6xx: A640/A650 GMU firmware path Jonathan Marek
2020-04-20 14:03 ` [PATCH 6/9] drm/msm/a6xx: add support for A650 gmu rscc registers Jonathan Marek
2020-04-20 14:03 ` [PATCH 7/9] drm/msm/a6xx: gmu_pdc register values for A640 and A650 Jonathan Marek
2020-04-21 16:34 ` Jordan Crouse
2020-04-20 14:03 ` [PATCH 8/9] drm/msm/a6xx: enable GMU log Jonathan Marek
2020-04-21 16:38 ` [Freedreno] " Jordan Crouse
2020-04-20 14:03 ` [PATCH 9/9] drm/msm/a6xx: update a6xx_hw_init for A640 and A650 Jonathan Marek
2020-04-21 16:48 ` Jordan Crouse
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=CAF6AEGscSfS58d4gYVPUsC5Y2j8TmY5zj2kZRGz7y_hfja-xLQ@mail.gmail.com \
--to=robdclark@gmail.com \
--cc=airlied@linux.ie \
--cc=bjorn.andersson@linaro.org \
--cc=dri-devel@lists.freedesktop.org \
--cc=freedreno@lists.freedesktop.org \
--cc=jonathan@marek.ca \
--cc=linux-arm-msm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=michael.j.ruhl@intel.com \
--cc=sean@poorly.run \
--cc=smasetty@codeaurora.org \
--cc=swboyd@chromium.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).