| Message ID | 1476177787-15003-3-git-send-email-jarkko.sakkinen@linux.intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Tue, Oct 11, 2016 at 12:23:04PM +0300, Jarkko Sakkinen wrote: > In order to provide access to locality registers, this commits adds > mapping of the head of the CRB registers, which are located right > before the control area. > > Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> > --- > drivers/char/tpm/tpm_crb.c | 86 +++++++++++++++++++++++++++++----------------- > 1 file changed, 54 insertions(+), 32 deletions(-) > > diff --git a/drivers/char/tpm/tpm_crb.c b/drivers/char/tpm/tpm_crb.c > index 65040d7..c34318b 100644 > --- a/drivers/char/tpm/tpm_crb.c > +++ b/drivers/char/tpm/tpm_crb.c > @@ -52,18 +52,28 @@ enum crb_cancel { > CRB_CANCEL_INVOKE = BIT(0), > }; > > -struct crb_control_area { > - u32 req; > - u32 sts; > - u32 cancel; > - u32 start; > - u32 int_enable; > - u32 int_sts; > - u32 cmd_size; > - u32 cmd_pa_low; > - u32 cmd_pa_high; > - u32 rsp_size; > - u64 rsp_pa; > +struct crb_regs_head { > + u32 loc_state; > + u32 reserved1; > + u32 loc_ctrl; > + u32 loc_sts; > + u8 reserved2[32]; > + u64 intf_id; > + u64 ctrl_ext; > +} __packed; > + > +struct crb_regs_tail { > + u32 ctrl_req; > + u32 ctrl_sts; > + u32 ctrl_cancel; > + u32 ctrl_start; > + u32 ctrl_int_enable; > + u32 ctrl_int_sts; > + u32 ctrl_cmd_size; > + u32 ctrl_cmd_pa_low; > + u32 ctrl_cmd_pa_high; > + u32 ctrl_rsp_size; > + u64 ctrl_rsp_pa; > } __packed; > > enum crb_status { > @@ -78,7 +88,8 @@ enum crb_flags { > struct crb_priv { > unsigned int flags; > void __iomem *iobase; > - struct crb_control_area __iomem *cca; > + struct crb_regs_head __iomem *regs_h; > + struct crb_regs_tail __iomem *regs_t; > u8 __iomem *cmd; > u8 __iomem *rsp; > u32 cmd_size; > @@ -104,7 +115,7 @@ static int __maybe_unused crb_go_idle(struct device *dev, struct crb_priv *priv) > if (priv->flags & CRB_FL_ACPI_START) > return 0; > > - iowrite32(CRB_CTRL_REQ_GO_IDLE, &priv->cca->req); > + iowrite32(CRB_CTRL_REQ_GO_IDLE, &priv->regs_t->ctrl_req); > /* we don't really care when this settles */ > > return 0; > @@ -128,16 +139,18 @@ static int __maybe_unused crb_cmd_ready(struct device *dev, > struct crb_priv *priv) > { > ktime_t stop, start; > + u32 req; > > if (priv->flags & CRB_FL_ACPI_START) > return 0; > > - iowrite32(CRB_CTRL_REQ_CMD_READY, &priv->cca->req); > + iowrite32(CRB_CTRL_REQ_CMD_READY, &priv->regs_t->ctrl_req); > > start = ktime_get(); > stop = ktime_add(start, ms_to_ktime(TPM2_TIMEOUT_C)); > do { > - if (!(ioread32(&priv->cca->req) & CRB_CTRL_REQ_CMD_READY)) { > + req = ioread32(&priv->regs_t->ctrl_req); > + if (!(req & CRB_CTRL_REQ_CMD_READY)) { > dev_dbg(dev, "cmdReady in %lld usecs\n", > ktime_to_us(ktime_sub(ktime_get(), start))); > return 0; > @@ -145,7 +158,7 @@ static int __maybe_unused crb_cmd_ready(struct device *dev, > usleep_range(50, 100); > } while (ktime_before(ktime_get(), stop)); > > - if (ioread32(&priv->cca->req) & CRB_CTRL_REQ_CMD_READY) { > + if (ioread32(&priv->regs_t->ctrl_req) & CRB_CTRL_REQ_CMD_READY) { > dev_warn(dev, "cmdReady timed out\n"); > return -ETIME; > } > @@ -158,7 +171,7 @@ static u8 crb_status(struct tpm_chip *chip) > struct crb_priv *priv = dev_get_drvdata(&chip->dev); > u8 sts = 0; > > - if ((ioread32(&priv->cca->start) & CRB_START_INVOKE) != > + if ((ioread32(&priv->regs_t->ctrl_start) & CRB_START_INVOKE) != > CRB_START_INVOKE) > sts |= CRB_DRV_STS_COMPLETE; > > @@ -174,7 +187,7 @@ static int crb_recv(struct tpm_chip *chip, u8 *buf, size_t count) > if (count < 6) > return -EIO; > > - if (ioread32(&priv->cca->sts) & CRB_CTRL_STS_ERROR) > + if (ioread32(&priv->regs_t->ctrl_sts) & CRB_CTRL_STS_ERROR) > return -EIO; > > memcpy_fromio(buf, priv->rsp, 6); > @@ -213,7 +226,7 @@ static int crb_send(struct tpm_chip *chip, u8 *buf, size_t len) > /* Zero the cancel register so that the next command will not get > * canceled. > */ > - iowrite32(0, &priv->cca->cancel); > + iowrite32(0, &priv->regs_t->ctrl_cancel); > > if (len > priv->cmd_size) { > dev_err(&chip->dev, "invalid command count value %zd %d\n", > @@ -227,7 +240,7 @@ static int crb_send(struct tpm_chip *chip, u8 *buf, size_t len) > wmb(); > > if (priv->flags & CRB_FL_CRB_START) > - iowrite32(CRB_START_INVOKE, &priv->cca->start); > + iowrite32(CRB_START_INVOKE, &priv->regs_t->ctrl_start); > > if (priv->flags & CRB_FL_ACPI_START) > rc = crb_do_acpi_start(chip); > @@ -239,7 +252,7 @@ static void crb_cancel(struct tpm_chip *chip) > { > struct crb_priv *priv = dev_get_drvdata(&chip->dev); > > - iowrite32(CRB_CANCEL_INVOKE, &priv->cca->cancel); > + iowrite32(CRB_CANCEL_INVOKE, &priv->regs_t->ctrl_cancel); > > if ((priv->flags & CRB_FL_ACPI_START) && crb_do_acpi_start(chip)) > dev_err(&chip->dev, "ACPI Start failed\n"); > @@ -248,7 +261,7 @@ static void crb_cancel(struct tpm_chip *chip) > static bool crb_req_canceled(struct tpm_chip *chip, u8 status) > { > struct crb_priv *priv = dev_get_drvdata(&chip->dev); > - u32 cancel = ioread32(&priv->cca->cancel); > + u32 cancel = ioread32(&priv->regs_t->ctrl_cancel); > > return (cancel & CRB_CANCEL_INVOKE) == CRB_CANCEL_INVOKE; > } > @@ -290,6 +303,8 @@ static void __iomem *crb_map_res(struct device *dev, struct crb_priv *priv, > if (start != new_res.start) > return (void __iomem *) ERR_PTR(-EINVAL); > > + dev_dbg(dev, "%pr %pr", io_res, &new_res); > + > if (!resource_contains(io_res, &new_res)) > return devm_ioremap_resource(dev, &new_res); > > @@ -325,10 +340,17 @@ static int crb_map_io(struct acpi_device *device, struct crb_priv *priv, > if (IS_ERR(priv->iobase)) > return PTR_ERR(priv->iobase); > > - priv->cca = crb_map_res(dev, priv, &io_res, buf->control_address, > - sizeof(struct crb_control_area)); > - if (IS_ERR(priv->cca)) > - return PTR_ERR(priv->cca); > + if (priv->flags & CRB_FL_CRB_START) { Oops. Should be check for CRB_FL_ACPI_START. Because we anyway *always* set CRB_FL_CRB_START for everything how about ripping of CRB_FL_CRB_START flag completely in order to not cause mistakes like this in future? /Jarkko > + priv->regs_h = crb_map_res(dev, priv, &io_res, io_res.start, > + sizeof(struct crb_regs_head)); > + if (IS_ERR(priv->regs_h)) > + return PTR_ERR(priv->regs_h); > + } > + > + priv->regs_t = crb_map_res(dev, priv, &io_res, buf->control_address, > + sizeof(struct crb_regs_tail)); > + if (IS_ERR(priv->regs_t)) > + return PTR_ERR(priv->regs_t); ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot
On Tue, Oct 11, 2016 at 12:23:04PM +0300, Jarkko Sakkinen wrote: > In order to provide access to locality registers, this commits adds > mapping of the head of the CRB registers, which are located right > before the control area. I think you should squash this into the prior patch, no sense in changing all these lines twice But looks better to me. > - priv->cca = crb_map_res(dev, priv, &io_res, buf->control_address, > - sizeof(struct crb_control_area)); > - if (IS_ERR(priv->cca)) > - return PTR_ERR(priv->cca); > + if (priv->flags & CRB_FL_CRB_START) { > + priv->regs_h = crb_map_res(dev, priv, &io_res, io_res.start, > + sizeof(struct crb_regs_head)); > + if (IS_ERR(priv->regs_h)) > + return PTR_ERR(priv->regs_h); > + } > + > + priv->regs_t = crb_map_res(dev, priv, &io_res, buf->control_address, > + sizeof(struct crb_regs_tail)); > + if (IS_ERR(priv->regs_t)) > + return PTR_ERR(priv->regs_t); So.. The ACPI IO region starts at the head area and continues to include the control area, as one nice sane region - except for some older stuff that puts the control area outside the ACPI IO region? That makes a lot more sense.. Maybe chuck in a if (priv->flags & CRB_FL_CRB_START) { if (buf->control_address != io_res.start + sizeof(struct crb_regs_head)) dev_warn(dev, FIRMWARE_BUG "Bad ACPI memory layout") Jason ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot
On Tue, Oct 11, 2016 at 11:01:43AM -0600, Jason Gunthorpe wrote: > On Tue, Oct 11, 2016 at 12:23:04PM +0300, Jarkko Sakkinen wrote: > > In order to provide access to locality registers, this commits adds > > mapping of the head of the CRB registers, which are located right > > before the control area. > > I think you should squash this into the prior patch, no sense in > changing all these lines twice > > But looks better to me. So... do you suggest to squash with request/reliquish locality stuff? Just checking because this is 1/3 :) > > - priv->cca = crb_map_res(dev, priv, &io_res, buf->control_address, > > - sizeof(struct crb_control_area)); > > - if (IS_ERR(priv->cca)) > > - return PTR_ERR(priv->cca); > > + if (priv->flags & CRB_FL_CRB_START) { > > + priv->regs_h = crb_map_res(dev, priv, &io_res, io_res.start, > > + sizeof(struct crb_regs_head)); > > + if (IS_ERR(priv->regs_h)) > > + return PTR_ERR(priv->regs_h); > > + } > > + > > + priv->regs_t = crb_map_res(dev, priv, &io_res, buf->control_address, > > + sizeof(struct crb_regs_tail)); > > + if (IS_ERR(priv->regs_t)) > > + return PTR_ERR(priv->regs_t); > > So.. The ACPI IO region starts at the head area and continues to > include the control area, as one nice sane region - except for some > older stuff that puts the control area outside the ACPI IO region? Yes. The old hardware triggered SMM to do a DMA transfer (those that so called ACPI start). As a workaround for some of the hardware the driver always sets the CRB start flag also in the control area. That's why I also propose that we replace them with a single flag. > That makes a lot more sense.. > > Maybe chuck in a > > if (priv->flags & CRB_FL_CRB_START) { > if (buf->control_address != io_res.start + sizeof(struct > crb_regs_head)) > dev_warn(dev, FIRMWARE_BUG "Bad ACPI memory layout") > > Jason As a sanity check this would probably make sense. /Jarkko ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot
On Tue, Oct 11, 2016 at 09:21:00PM +0300, Jarkko Sakkinen wrote: > On Tue, Oct 11, 2016 at 11:01:43AM -0600, Jason Gunthorpe wrote: > > On Tue, Oct 11, 2016 at 12:23:04PM +0300, Jarkko Sakkinen wrote: > > > In order to provide access to locality registers, this commits adds > > > mapping of the head of the CRB registers, which are located right > > > before the control area. > > > > I think you should squash this into the prior patch, no sense in > > changing all these lines twice > > > > But looks better to me. > > So... do you suggest to squash with request/reliquish locality stuff? > Just checking because this is 1/3 :) Hm, maybe my mailer went wrong, but I saw the original patch right before this one.. Never mind Jason ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot
On Tue, Oct 11, 2016 at 12:29:22PM -0600, Jason Gunthorpe wrote: > On Tue, Oct 11, 2016 at 09:21:00PM +0300, Jarkko Sakkinen wrote: > > On Tue, Oct 11, 2016 at 11:01:43AM -0600, Jason Gunthorpe wrote: > > > On Tue, Oct 11, 2016 at 12:23:04PM +0300, Jarkko Sakkinen wrote: > > > > In order to provide access to locality registers, this commits adds > > > > mapping of the head of the CRB registers, which are located right > > > > before the control area. > > > > > > I think you should squash this into the prior patch, no sense in > > > changing all these lines twice > > > > > > But looks better to me. > > > > So... do you suggest to squash with request/reliquish locality stuff? > > Just checking because this is 1/3 :) > > Hm, maybe my mailer went wrong, but I saw the original patch right > before this one.. Never mind I did format-patch -o to the same folder where I had the first series so I posted the RFC patches by accident. Sorry. Should always do --dry-run. > Jason /Jarkko ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot
diff --git a/drivers/char/tpm/tpm_crb.c b/drivers/char/tpm/tpm_crb.c index 65040d7..c34318b 100644 --- a/drivers/char/tpm/tpm_crb.c +++ b/drivers/char/tpm/tpm_crb.c @@ -52,18 +52,28 @@ enum crb_cancel { CRB_CANCEL_INVOKE = BIT(0), }; -struct crb_control_area { - u32 req; - u32 sts; - u32 cancel; - u32 start; - u32 int_enable; - u32 int_sts; - u32 cmd_size; - u32 cmd_pa_low; - u32 cmd_pa_high; - u32 rsp_size; - u64 rsp_pa; +struct crb_regs_head { + u32 loc_state; + u32 reserved1; + u32 loc_ctrl; + u32 loc_sts; + u8 reserved2[32]; + u64 intf_id; + u64 ctrl_ext; +} __packed; + +struct crb_regs_tail { + u32 ctrl_req; + u32 ctrl_sts; + u32 ctrl_cancel; + u32 ctrl_start; + u32 ctrl_int_enable; + u32 ctrl_int_sts; + u32 ctrl_cmd_size; + u32 ctrl_cmd_pa_low; + u32 ctrl_cmd_pa_high; + u32 ctrl_rsp_size; + u64 ctrl_rsp_pa; } __packed; enum crb_status { @@ -78,7 +88,8 @@ enum crb_flags { struct crb_priv { unsigned int flags; void __iomem *iobase; - struct crb_control_area __iomem *cca; + struct crb_regs_head __iomem *regs_h; + struct crb_regs_tail __iomem *regs_t; u8 __iomem *cmd; u8 __iomem *rsp; u32 cmd_size; @@ -104,7 +115,7 @@ static int __maybe_unused crb_go_idle(struct device *dev, struct crb_priv *priv) if (priv->flags & CRB_FL_ACPI_START) return 0; - iowrite32(CRB_CTRL_REQ_GO_IDLE, &priv->cca->req); + iowrite32(CRB_CTRL_REQ_GO_IDLE, &priv->regs_t->ctrl_req); /* we don't really care when this settles */ return 0; @@ -128,16 +139,18 @@ static int __maybe_unused crb_cmd_ready(struct device *dev, struct crb_priv *priv) { ktime_t stop, start; + u32 req; if (priv->flags & CRB_FL_ACPI_START) return 0; - iowrite32(CRB_CTRL_REQ_CMD_READY, &priv->cca->req); + iowrite32(CRB_CTRL_REQ_CMD_READY, &priv->regs_t->ctrl_req); start = ktime_get(); stop = ktime_add(start, ms_to_ktime(TPM2_TIMEOUT_C)); do { - if (!(ioread32(&priv->cca->req) & CRB_CTRL_REQ_CMD_READY)) { + req = ioread32(&priv->regs_t->ctrl_req); + if (!(req & CRB_CTRL_REQ_CMD_READY)) { dev_dbg(dev, "cmdReady in %lld usecs\n", ktime_to_us(ktime_sub(ktime_get(), start))); return 0; @@ -145,7 +158,7 @@ static int __maybe_unused crb_cmd_ready(struct device *dev, usleep_range(50, 100); } while (ktime_before(ktime_get(), stop)); - if (ioread32(&priv->cca->req) & CRB_CTRL_REQ_CMD_READY) { + if (ioread32(&priv->regs_t->ctrl_req) & CRB_CTRL_REQ_CMD_READY) { dev_warn(dev, "cmdReady timed out\n"); return -ETIME; } @@ -158,7 +171,7 @@ static u8 crb_status(struct tpm_chip *chip) struct crb_priv *priv = dev_get_drvdata(&chip->dev); u8 sts = 0; - if ((ioread32(&priv->cca->start) & CRB_START_INVOKE) != + if ((ioread32(&priv->regs_t->ctrl_start) & CRB_START_INVOKE) != CRB_START_INVOKE) sts |= CRB_DRV_STS_COMPLETE; @@ -174,7 +187,7 @@ static int crb_recv(struct tpm_chip *chip, u8 *buf, size_t count) if (count < 6) return -EIO; - if (ioread32(&priv->cca->sts) & CRB_CTRL_STS_ERROR) + if (ioread32(&priv->regs_t->ctrl_sts) & CRB_CTRL_STS_ERROR) return -EIO; memcpy_fromio(buf, priv->rsp, 6); @@ -213,7 +226,7 @@ static int crb_send(struct tpm_chip *chip, u8 *buf, size_t len) /* Zero the cancel register so that the next command will not get * canceled. */ - iowrite32(0, &priv->cca->cancel); + iowrite32(0, &priv->regs_t->ctrl_cancel); if (len > priv->cmd_size) { dev_err(&chip->dev, "invalid command count value %zd %d\n", @@ -227,7 +240,7 @@ static int crb_send(struct tpm_chip *chip, u8 *buf, size_t len) wmb(); if (priv->flags & CRB_FL_CRB_START) - iowrite32(CRB_START_INVOKE, &priv->cca->start); + iowrite32(CRB_START_INVOKE, &priv->regs_t->ctrl_start); if (priv->flags & CRB_FL_ACPI_START) rc = crb_do_acpi_start(chip); @@ -239,7 +252,7 @@ static void crb_cancel(struct tpm_chip *chip) { struct crb_priv *priv = dev_get_drvdata(&chip->dev); - iowrite32(CRB_CANCEL_INVOKE, &priv->cca->cancel); + iowrite32(CRB_CANCEL_INVOKE, &priv->regs_t->ctrl_cancel); if ((priv->flags & CRB_FL_ACPI_START) && crb_do_acpi_start(chip)) dev_err(&chip->dev, "ACPI Start failed\n"); @@ -248,7 +261,7 @@ static void crb_cancel(struct tpm_chip *chip) static bool crb_req_canceled(struct tpm_chip *chip, u8 status) { struct crb_priv *priv = dev_get_drvdata(&chip->dev); - u32 cancel = ioread32(&priv->cca->cancel); + u32 cancel = ioread32(&priv->regs_t->ctrl_cancel); return (cancel & CRB_CANCEL_INVOKE) == CRB_CANCEL_INVOKE; } @@ -290,6 +303,8 @@ static void __iomem *crb_map_res(struct device *dev, struct crb_priv *priv, if (start != new_res.start) return (void __iomem *) ERR_PTR(-EINVAL); + dev_dbg(dev, "%pr %pr", io_res, &new_res); + if (!resource_contains(io_res, &new_res)) return devm_ioremap_resource(dev, &new_res); @@ -325,10 +340,17 @@ static int crb_map_io(struct acpi_device *device, struct crb_priv *priv, if (IS_ERR(priv->iobase)) return PTR_ERR(priv->iobase); - priv->cca = crb_map_res(dev, priv, &io_res, buf->control_address, - sizeof(struct crb_control_area)); - if (IS_ERR(priv->cca)) - return PTR_ERR(priv->cca); + if (priv->flags & CRB_FL_CRB_START) { + priv->regs_h = crb_map_res(dev, priv, &io_res, io_res.start, + sizeof(struct crb_regs_head)); + if (IS_ERR(priv->regs_h)) + return PTR_ERR(priv->regs_h); + } + + priv->regs_t = crb_map_res(dev, priv, &io_res, buf->control_address, + sizeof(struct crb_regs_tail)); + if (IS_ERR(priv->regs_t)) + return PTR_ERR(priv->regs_t); /* * PTT HW bug w/a: wake up the device to access @@ -338,10 +360,10 @@ static int crb_map_io(struct acpi_device *device, struct crb_priv *priv, if (ret) return ret; - pa_high = ioread32(&priv->cca->cmd_pa_high); - pa_low = ioread32(&priv->cca->cmd_pa_low); + pa_high = ioread32(&priv->regs_t->ctrl_cmd_pa_high); + pa_low = ioread32(&priv->regs_t->ctrl_cmd_pa_low); cmd_pa = ((u64)pa_high << 32) | pa_low; - cmd_size = ioread32(&priv->cca->cmd_size); + cmd_size = ioread32(&priv->regs_t->ctrl_cmd_size); dev_dbg(dev, "cmd_hi = %X cmd_low = %X cmd_size %X\n", pa_high, pa_low, cmd_size); @@ -352,9 +374,9 @@ static int crb_map_io(struct acpi_device *device, struct crb_priv *priv, goto out; } - memcpy_fromio(&rsp_pa, &priv->cca->rsp_pa, 8); + memcpy_fromio(&rsp_pa, &priv->regs_t->ctrl_rsp_pa, 8); rsp_pa = le64_to_cpu(rsp_pa); - rsp_size = ioread32(&priv->cca->rsp_size); + rsp_size = ioread32(&priv->regs_t->ctrl_rsp_size); if (cmd_pa != rsp_pa) { priv->rsp = crb_map_res(dev, priv, &io_res, rsp_pa, rsp_size);
In order to provide access to locality registers, this commits adds mapping of the head of the CRB registers, which are located right before the control area. Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> --- drivers/char/tpm/tpm_crb.c | 86 +++++++++++++++++++++++++++++----------------- 1 file changed, 54 insertions(+), 32 deletions(-)