On Mon, Oct 12, 2015 at 09:12:57PM +0000, Williams, Dan J wrote:
> On Mon, 2015-10-12 at 09:01 +0200, Daniel Vetter wrote:
> > On Fri, Oct 09, 2015 at 06:16:25PM -0400, Dan Williams wrote:
> > > i915 expects the OpRegion to be cached (i.e. not __iomem), so explicitly
> > > map it with memremap rather than the implied cache setting of
> > > acpi_os_ioremap().
> > >
> > > Cc: Daniel Vetter <daniel.vetter@xxxxxxxxx>
> > > Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
> > > Cc: intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> > > Cc: David Airlie <airlied@xxxxxxxx>
> > > Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
> > > Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
> >
> > Assuming you've run sparse over this to make sure you've caught them all,
> > and with the nit below addressed this is
> >
> > Reviewed-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
>
> Indeed, re-running sparse again found a few conversions of ioread* I
> missed as well as moving the force casting out of validate_vbt() to
> find_vbt().
>
> > Feel free to pull v2 into whatever tree you think it's suitable for (but
> > you can also resend and I'll pick it up).
>
> Please pick up v2 below.
Queued for -next, thanks for the patch. Aside: Attached or separate mail
seems easier, somehow git apply-mbox can't auto-eat this for of patch.
-Daniel
>
> >
> > > diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c
> > > index e2ab3f6ed022..c8444d5f549f 100644
> > > --- a/drivers/gpu/drm/i915/intel_panel.c
> > > +++ b/drivers/gpu/drm/i915/intel_panel.c
> > > @@ -387,7 +387,7 @@ intel_panel_detect(struct drm_device *dev)
> > >
> > > /* Assume that the BIOS does not lie through the OpRegion... */
> > > if (!i915.panel_ignore_lid && dev_priv->opregion.lid_state) {
> > > - return ioread32(dev_priv->opregion.lid_state) & 0x1 ?
> > > + return *(dev_priv->opregion.lid_state) & 0x1 ?
> >
> > () are redundant now here.
>
> Yup, fixed.
>
> 8<----
> Subject: i915: switch from acpi_os_ioremap to memremap
>
> From: Dan Williams <dan.j.williams@xxxxxxxxx>
>
> i915 expects the OpRegion to be cached (i.e. not __iomem), so explicitly
> map it with memremap rather than the implied cache setting of
> acpi_os_ioremap().
>
> Cc: Daniel Vetter <daniel.vetter@xxxxxxxxx>
> Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
> Cc: intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> Cc: David Airlie <airlied@xxxxxxxx>
> Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
> Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/i915_debugfs.c | 2 -
> drivers/gpu/drm/i915/i915_drv.h | 12 ++---
> drivers/gpu/drm/i915/intel_bios.c | 25 +++++-----
> drivers/gpu/drm/i915/intel_opregion.c | 83 ++++++++++++++++-----------------
> drivers/gpu/drm/i915/intel_panel.c | 2 -
> 5 files changed, 62 insertions(+), 62 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
> index e3ec9049081f..15989cc16e92 100644
> --- a/drivers/gpu/drm/i915/i915_debugfs.c
> +++ b/drivers/gpu/drm/i915/i915_debugfs.c
> @@ -1849,7 +1849,7 @@ static int i915_opregion(struct seq_file *m, void *unused)
> goto out;
>
> if (opregion->header) {
> - memcpy_fromio(data, opregion->header, OPREGION_SIZE);
> + memcpy(data, opregion->header, OPREGION_SIZE);
> seq_write(m, data, OPREGION_SIZE);
> }
>
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index e1db8de52851..d8684634a31d 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -444,14 +444,14 @@ struct opregion_swsci;
> struct opregion_asle;
>
> struct intel_opregion {
> - struct opregion_header __iomem *header;
> - struct opregion_acpi __iomem *acpi;
> - struct opregion_swsci __iomem *swsci;
> + struct opregion_header *header;
> + struct opregion_acpi *acpi;
> + struct opregion_swsci *swsci;
> u32 swsci_gbda_sub_functions;
> u32 swsci_sbcb_sub_functions;
> - struct opregion_asle __iomem *asle;
> - void __iomem *vbt;
> - u32 __iomem *lid_state;
> + struct opregion_asle *asle;
> + void *vbt;
> + u32 *lid_state;
> struct work_struct asle_work;
> };
> #define OPREGION_SIZE (8*1024)
> diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c
> index c19e669ffe50..f6762a5faee8 100644
> --- a/drivers/gpu/drm/i915/intel_bios.c
> +++ b/drivers/gpu/drm/i915/intel_bios.c
> @@ -1231,20 +1231,13 @@ static const struct dmi_system_id intel_no_opregion_vbt[] = {
> { }
> };
>
> -static const struct bdb_header *validate_vbt(const void __iomem *_base,
> +static const struct bdb_header *validate_vbt(const void *base,
> size_t size,
> - const void __iomem *_vbt,
> + const void *_vbt,
> const char *source)
> {
> - /*
> - * This is the one place where we explicitly discard the address space
> - * (__iomem) of the BIOS/VBT. (And this will cause a sparse complaint.)
> - * From now on everything is based on 'base', and treated as regular
> - * memory.
> - */
> - const void *base = (const void *) _base;
> - size_t offset = _vbt - _base;
> - const struct vbt_header *vbt = base + offset;
> + size_t offset = _vbt - base;
> + const struct vbt_header *vbt = _vbt;
> const struct bdb_header *bdb;
>
> if (offset + sizeof(struct vbt_header) > size) {
> @@ -1282,7 +1275,15 @@ static const struct bdb_header *find_vbt(void __iomem *bios, size_t size)
> /* Scour memory looking for the VBT signature. */
> for (i = 0; i + 4 < size; i++) {
> if (ioread32(bios + i) == *((const u32 *) "$VBT")) {
> - bdb = validate_vbt(bios, size, bios + i, "PCI ROM");
> + /*
> + * This is the one place where we explicitly discard the
> + * address space (__iomem) of the BIOS/VBT. From now on
> + * everything is based on 'base', and treated as regular
> + * memory.
> + */
> + void *_bios = (void __force *) bios;
> +
> + bdb = validate_vbt(_bios, size, _bios + i, "PCI ROM");
> break;
> }
> }
> diff --git a/drivers/gpu/drm/i915/intel_opregion.c b/drivers/gpu/drm/i915/intel_opregion.c
> index cb1c65739425..41d44a5ef626 100644
> --- a/drivers/gpu/drm/i915/intel_opregion.c
> +++ b/drivers/gpu/drm/i915/intel_opregion.c
> @@ -239,7 +239,7 @@ struct opregion_asle {
> static int swsci(struct drm_device *dev, u32 function, u32 parm, u32 *parm_out)
> {
> struct drm_i915_private *dev_priv = dev->dev_private;
> - struct opregion_swsci __iomem *swsci = dev_priv->opregion.swsci;
> + struct opregion_swsci *swsci = dev_priv->opregion.swsci;
> u32 main_function, sub_function, scic;
> u16 pci_swsci;
> u32 dslp;
> @@ -264,7 +264,7 @@ static int swsci(struct drm_device *dev, u32 function, u32 parm, u32 *parm_out)
> }
>
> /* Driver sleep timeout in ms. */
> - dslp = ioread32(&swsci->dslp);
> + dslp = swsci->dslp;
> if (!dslp) {
> /* The spec says 2ms should be the default, but it's too small
> * for some machines. */
> @@ -277,7 +277,7 @@ static int swsci(struct drm_device *dev, u32 function, u32 parm, u32 *parm_out)
> }
>
> /* The spec tells us to do this, but we are the only user... */
> - scic = ioread32(&swsci->scic);
> + scic = swsci->scic;
> if (scic & SWSCI_SCIC_INDICATOR) {
> DRM_DEBUG_DRIVER("SWSCI request already in progress\n");
> return -EBUSY;
> @@ -285,8 +285,8 @@ static int swsci(struct drm_device *dev, u32 function, u32 parm, u32 *parm_out)
>
> scic = function | SWSCI_SCIC_INDICATOR;
>
> - iowrite32(parm, &swsci->parm);
> - iowrite32(scic, &swsci->scic);
> + swsci->parm = parm;
> + swsci->scic = scic;
>
> /* Ensure SCI event is selected and event trigger is cleared. */
> pci_read_config_word(dev->pdev, PCI_SWSCI, &pci_swsci);
> @@ -301,7 +301,7 @@ static int swsci(struct drm_device *dev, u32 function, u32 parm, u32 *parm_out)
> pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci);
>
> /* Poll for the result. */
> -#define C (((scic = ioread32(&swsci->scic)) & SWSCI_SCIC_INDICATOR) == 0)
> +#define C (((scic = swsci->scic) & SWSCI_SCIC_INDICATOR) == 0)
> if (wait_for(C, dslp)) {
> DRM_DEBUG_DRIVER("SWSCI request timed out\n");
> return -ETIMEDOUT;
> @@ -317,7 +317,7 @@ static int swsci(struct drm_device *dev, u32 function, u32 parm, u32 *parm_out)
> }
>
> if (parm_out)
> - *parm_out = ioread32(&swsci->parm);
> + *parm_out = swsci->parm;
>
> return 0;
>
> @@ -407,7 +407,7 @@ static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
> {
> struct drm_i915_private *dev_priv = dev->dev_private;
> struct intel_connector *intel_connector;
> - struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
> + struct opregion_asle *asle = dev_priv->opregion.asle;
>
> DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
>
> @@ -432,7 +432,7 @@ static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
> DRM_DEBUG_KMS("updating opregion backlight %d/255\n", bclp);
> list_for_each_entry(intel_connector, &dev->mode_config.connector_list, base.head)
> intel_panel_set_backlight_acpi(intel_connector, bclp, 255);
> - iowrite32(DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID, &asle->cblv);
> + asle->cblv = DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID;
>
> drm_modeset_unlock(&dev->mode_config.connection_mutex);
>
> @@ -519,14 +519,14 @@ static void asle_work(struct work_struct *work)
> struct drm_i915_private *dev_priv =
> container_of(opregion, struct drm_i915_private, opregion);
> struct drm_device *dev = dev_priv->dev;
> - struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
> + struct opregion_asle *asle = dev_priv->opregion.asle;
> u32 aslc_stat = 0;
> u32 aslc_req;
>
> if (!asle)
> return;
>
> - aslc_req = ioread32(&asle->aslc);
> + aslc_req = asle->aslc;
>
> if (!(aslc_req & ASLC_REQ_MSK)) {
> DRM_DEBUG_DRIVER("No request on ASLC interrupt 0x%08x\n",
> @@ -535,34 +535,34 @@ static void asle_work(struct work_struct *work)
> }
>
> if (aslc_req & ASLC_SET_ALS_ILLUM)
> - aslc_stat |= asle_set_als_illum(dev, ioread32(&asle->alsi));
> + aslc_stat |= asle_set_als_illum(dev, asle->alsi);
>
> if (aslc_req & ASLC_SET_BACKLIGHT)
> - aslc_stat |= asle_set_backlight(dev, ioread32(&asle->bclp));
> + aslc_stat |= asle_set_backlight(dev, asle->bclp);
>
> if (aslc_req & ASLC_SET_PFIT)
> - aslc_stat |= asle_set_pfit(dev, ioread32(&asle->pfit));
> + aslc_stat |= asle_set_pfit(dev, asle->pfit);
>
> if (aslc_req & ASLC_SET_PWM_FREQ)
> - aslc_stat |= asle_set_pwm_freq(dev, ioread32(&asle->pfmb));
> + aslc_stat |= asle_set_pwm_freq(dev, asle->pfmb);
>
> if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES)
> aslc_stat |= asle_set_supported_rotation_angles(dev,
> - ioread32(&asle->srot));
> + asle->srot);
>
> if (aslc_req & ASLC_BUTTON_ARRAY)
> - aslc_stat |= asle_set_button_array(dev, ioread32(&asle->iuer));
> + aslc_stat |= asle_set_button_array(dev, asle->iuer);
>
> if (aslc_req & ASLC_CONVERTIBLE_INDICATOR)
> - aslc_stat |= asle_set_convertible(dev, ioread32(&asle->iuer));
> + aslc_stat |= asle_set_convertible(dev, asle->iuer);
>
> if (aslc_req & ASLC_DOCKING_INDICATOR)
> - aslc_stat |= asle_set_docking(dev, ioread32(&asle->iuer));
> + aslc_stat |= asle_set_docking(dev, asle->iuer);
>
> if (aslc_req & ASLC_ISCT_STATE_CHANGE)
> aslc_stat |= asle_isct_state(dev);
>
> - iowrite32(aslc_stat, &asle->aslc);
> + asle->aslc = aslc_stat;
> }
>
> void intel_opregion_asle_intr(struct drm_device *dev)
> @@ -587,8 +587,8 @@ static int intel_opregion_video_event(struct notifier_block *nb,
> Linux, these are handled by the dock, button and video drivers.
> */
>
> - struct opregion_acpi __iomem *acpi;
> struct acpi_bus_event *event = data;
> + struct opregion_acpi *acpi;
> int ret = NOTIFY_OK;
>
> if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
> @@ -599,11 +599,10 @@ static int intel_opregion_video_event(struct notifier_block *nb,
>
> acpi = system_opregion->acpi;
>
> - if (event->type == 0x80 &&
> - (ioread32(&acpi->cevt) & 1) == 0)
> + if (event->type == 0x80 && ((acpi->cevt & 1) == 0))
> ret = NOTIFY_BAD;
>
> - iowrite32(0, &acpi->csts);
> + acpi->csts = 0;
>
> return ret;
> }
> @@ -623,14 +622,14 @@ static u32 get_did(struct intel_opregion *opregion, int i)
> u32 did;
>
> if (i < ARRAY_SIZE(opregion->acpi->didl)) {
> - did = ioread32(&opregion->acpi->didl[i]);
> + did = opregion->acpi->didl[i];
> } else {
> i -= ARRAY_SIZE(opregion->acpi->didl);
>
> if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2)))
> return 0;
>
> - did = ioread32(&opregion->acpi->did2[i]);
> + did = opregion->acpi->did2[i];
> }
>
> return did;
> @@ -639,14 +638,14 @@ static u32 get_did(struct intel_opregion *opregion, int i)
> static void set_did(struct intel_opregion *opregion, int i, u32 val)
> {
> if (i < ARRAY_SIZE(opregion->acpi->didl)) {
> - iowrite32(val, &opregion->acpi->didl[i]);
> + opregion->acpi->didl[i] = val;
> } else {
> i -= ARRAY_SIZE(opregion->acpi->didl);
>
> if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2)))
> return;
>
> - iowrite32(val, &opregion->acpi->did2[i]);
> + opregion->acpi->did2[i] = val;
> }
> }
>
> @@ -768,7 +767,7 @@ static void intel_setup_cadls(struct drm_device *dev)
> * there are less than eight devices. */
> do {
> disp_id = get_did(opregion, i);
> - iowrite32(disp_id, &opregion->acpi->cadl[i]);
> + opregion->acpi->cadl[i] = disp_id;
> } while (++i < 8 && disp_id != 0);
> }
>
> @@ -787,16 +786,16 @@ void intel_opregion_init(struct drm_device *dev)
> /* Notify BIOS we are ready to handle ACPI video ext notifs.
> * Right now, all the events are handled by the ACPI video module.
> * We don't actually need to do anything with them. */
> - iowrite32(0, &opregion->acpi->csts);
> - iowrite32(1, &opregion->acpi->drdy);
> + opregion->acpi->csts = 0;
> + opregion->acpi->drdy = 1;
>
> system_opregion = opregion;
> register_acpi_notifier(&intel_opregion_notifier);
> }
>
> if (opregion->asle) {
> - iowrite32(ASLE_TCHE_BLC_EN, &opregion->asle->tche);
> - iowrite32(ASLE_ARDY_READY, &opregion->asle->ardy);
> + opregion->asle->tche = ASLE_TCHE_BLC_EN;
> + opregion->asle->ardy = ASLE_ARDY_READY;
> }
> }
>
> @@ -809,19 +808,19 @@ void intel_opregion_fini(struct drm_device *dev)
> return;
>
> if (opregion->asle)
> - iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy);
> + opregion->asle->ardy = ASLE_ARDY_NOT_READY;
>
> cancel_work_sync(&dev_priv->opregion.asle_work);
>
> if (opregion->acpi) {
> - iowrite32(0, &opregion->acpi->drdy);
> + opregion->acpi->drdy = 0;
>
> system_opregion = NULL;
> unregister_acpi_notifier(&intel_opregion_notifier);
> }
>
> /* just clear all opregion memory pointers now */
> - iounmap(opregion->header);
> + memunmap(opregion->header);
> opregion->header = NULL;
> opregion->acpi = NULL;
> opregion->swsci = NULL;
> @@ -894,10 +893,10 @@ int intel_opregion_setup(struct drm_device *dev)
> {
> struct drm_i915_private *dev_priv = dev->dev_private;
> struct intel_opregion *opregion = &dev_priv->opregion;
> - void __iomem *base;
> u32 asls, mboxes;
> char buf[sizeof(OPREGION_SIGNATURE)];
> int err = 0;
> + void *base;
>
> BUILD_BUG_ON(sizeof(struct opregion_header) != 0x100);
> BUILD_BUG_ON(sizeof(struct opregion_acpi) != 0x100);
> @@ -915,11 +914,11 @@ int intel_opregion_setup(struct drm_device *dev)
> INIT_WORK(&opregion->asle_work, asle_work);
> #endif
>
> - base = acpi_os_ioremap(asls, OPREGION_SIZE);
> + base = memremap(asls, OPREGION_SIZE, MEMREMAP_WB);
> if (!base)
> return -ENOMEM;
>
> - memcpy_fromio(buf, base, sizeof(buf));
> + memcpy(buf, base, sizeof(buf));
>
> if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
> DRM_DEBUG_DRIVER("opregion signature mismatch\n");
> @@ -931,7 +930,7 @@ int intel_opregion_setup(struct drm_device *dev)
>
> opregion->lid_state = base + ACPI_CLID;
>
> - mboxes = ioread32(&opregion->header->mboxes);
> + mboxes = opregion->header->mboxes;
> if (mboxes & MBOX_ACPI) {
> DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
> opregion->acpi = base + OPREGION_ACPI_OFFSET;
> @@ -946,12 +945,12 @@ int intel_opregion_setup(struct drm_device *dev)
> DRM_DEBUG_DRIVER("ASLE supported\n");
> opregion->asle = base + OPREGION_ASLE_OFFSET;
>
> - iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy);
> + opregion->asle->ardy = ASLE_ARDY_NOT_READY;
> }
>
> return 0;
>
> err_out:
> - iounmap(base);
> + memunmap(base);
> return err;
> }
> diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c
> index e2ab3f6ed022..efe5424b290c 100644
> --- a/drivers/gpu/drm/i915/intel_panel.c
> +++ b/drivers/gpu/drm/i915/intel_panel.c
> @@ -387,7 +387,7 @@ intel_panel_detect(struct drm_device *dev)
>
> /* Assume that the BIOS does not lie through the OpRegion... */
> if (!i915.panel_ignore_lid && dev_priv->opregion.lid_state) {
> - return ioread32(dev_priv->opregion.lid_state) & 0x1 ?
> + return *dev_priv->opregion.lid_state & 0x1 ?
> connector_status_connected :
> connector_status_disconnected;
> }
>
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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