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Date: Mon, 18 Oct 2021 22:15:17 +0530
From: "Sireesh Kodali" <sireeshkodali1@...il.com>
To: "Alex Elder" <elder@...e.org>, <phone-devel@...r.kernel.org>,
<~postmarketos/upstreaming@...ts.sr.ht>, <netdev@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>,
<elder@...nel.org>
Cc: "Vladimir Lypak" <vladimir.lypak@...il.com>,
"David S. Miller" <davem@...emloft.net>,
"Jakub Kicinski" <kuba@...nel.org>
Subject: Re: [RFC PATCH 04/17] net: ipa: Establish ipa_dma interface
On Thu Oct 14, 2021 at 3:59 AM IST, Alex Elder wrote:
> On 9/19/21 10:07 PM, Sireesh Kodali wrote:
> > From: Vladimir Lypak <vladimir.lypak@...il.com>
> >
> > Establish callback-based interface to abstract GSI and BAM DMA differences.
> > Interface is based on prototypes from ipa_dma.h (old gsi.h). Callbacks
> > are stored in struct ipa_dma (old struct gsi) and assigned in gsi_init.
>
> This is interesting and seems to have been fairly easy to abstract
> this way. The patch is actually pretty straightforward, much more
> so than I would have expected. I think I'll have more to say about
> how to separate GSI from BAM in the future, but not today.
>
> -Alex
Yes, GSI code was fairly easy to abstract. Thankfully, the dmaegine API
maps very nicely onto the existing GSI API. I'm not sure if this was
intentional or accidental, but its nice either way.
Perhaps in future it might make sense to move the GSI code into a separate
dmaengine driver as well? In practice that should mean the IPA driver would
simply call into the dmaengine API, with no knowledge of the underlying
transport, and would remove the need for the BAM/GSI abstraction layer, since
the abstraction would be handled by dmaengine. I'm not sure how easy that
would be though.
Regards,
Sireesh
>
> > Signed-off-by: Vladimir Lypak <vladimir.lypak@...il.com>
> > Signed-off-by: Sireesh Kodali <sireeshkodali1@...il.com>
> > ---
> > drivers/net/ipa/gsi.c | 30 ++++++--
> > drivers/net/ipa/ipa_dma.h | 133 ++++++++++++++++++++++-----------
> > drivers/net/ipa/ipa_endpoint.c | 28 +++----
> > drivers/net/ipa/ipa_main.c | 18 ++---
> > drivers/net/ipa/ipa_power.c | 4 +-
> > drivers/net/ipa/ipa_trans.c | 2 +-
> > 6 files changed, 138 insertions(+), 77 deletions(-)
> >
> > diff --git a/drivers/net/ipa/gsi.c b/drivers/net/ipa/gsi.c
> > index 74ae0d07f859..39d9ca620a9f 100644
> > --- a/drivers/net/ipa/gsi.c
> > +++ b/drivers/net/ipa/gsi.c
> > @@ -99,6 +99,10 @@
> >
> > #define GSI_ISR_MAX_ITER 50 /* Detect interrupt storms */
> >
> > +static u32 gsi_channel_tre_max(struct ipa_dma *gsi, u32 channel_id);
> > +static u32 gsi_channel_trans_tre_max(struct ipa_dma *gsi, u32 channel_id);
> > +static void gsi_exit(struct ipa_dma *gsi);
> > +
> > /* An entry in an event ring */
> > struct gsi_event {
> > __le64 xfer_ptr;
> > @@ -869,7 +873,7 @@ static int __gsi_channel_start(struct ipa_channel *channel, bool resume)
> > }
> >
> > /* Start an allocated GSI channel */
> > -int gsi_channel_start(struct ipa_dma *gsi, u32 channel_id)
> > +static int gsi_channel_start(struct ipa_dma *gsi, u32 channel_id)
> > {
> > struct ipa_channel *channel = &gsi->channel[channel_id];
> > int ret;
> > @@ -924,7 +928,7 @@ static int __gsi_channel_stop(struct ipa_channel *channel, bool suspend)
> > }
> >
> > /* Stop a started channel */
> > -int gsi_channel_stop(struct ipa_dma *gsi, u32 channel_id)
> > +static int gsi_channel_stop(struct ipa_dma *gsi, u32 channel_id)
> > {
> > struct ipa_channel *channel = &gsi->channel[channel_id];
> > int ret;
> > @@ -941,7 +945,7 @@ int gsi_channel_stop(struct ipa_dma *gsi, u32 channel_id)
> > }
> >
> > /* Reset and reconfigure a channel, (possibly) enabling the doorbell engine */
> > -void gsi_channel_reset(struct ipa_dma *gsi, u32 channel_id, bool doorbell)
> > +static void gsi_channel_reset(struct ipa_dma *gsi, u32 channel_id, bool doorbell)
> > {
> > struct ipa_channel *channel = &gsi->channel[channel_id];
> >
> > @@ -1931,7 +1935,7 @@ int gsi_setup(struct ipa_dma *gsi)
> > }
> >
> > /* Inverse of gsi_setup() */
> > -void gsi_teardown(struct ipa_dma *gsi)
> > +static void gsi_teardown(struct ipa_dma *gsi)
> > {
> > gsi_channel_teardown(gsi);
> > gsi_irq_teardown(gsi);
> > @@ -2194,6 +2198,18 @@ int gsi_init(struct ipa_dma *gsi, struct platform_device *pdev,
> >
> > gsi->dev = dev;
> > gsi->version = version;
> > + gsi->setup = gsi_setup;
> > + gsi->teardown = gsi_teardown;
> > + gsi->exit = gsi_exit;
> > + gsi->suspend = gsi_suspend;
> > + gsi->resume = gsi_resume;
> > + gsi->channel_tre_max = gsi_channel_tre_max;
> > + gsi->channel_trans_tre_max = gsi_channel_trans_tre_max;
> > + gsi->channel_start = gsi_channel_start;
> > + gsi->channel_stop = gsi_channel_stop;
> > + gsi->channel_reset = gsi_channel_reset;
> > + gsi->channel_suspend = gsi_channel_suspend;
> > + gsi->channel_resume = gsi_channel_resume;
> >
> > /* GSI uses NAPI on all channels. Create a dummy network device
> > * for the channel NAPI contexts to be associated with.
> > @@ -2250,7 +2266,7 @@ int gsi_init(struct ipa_dma *gsi, struct platform_device *pdev,
> > }
> >
> > /* Inverse of gsi_init() */
> > -void gsi_exit(struct ipa_dma *gsi)
> > +static void gsi_exit(struct ipa_dma *gsi)
> > {
> > mutex_destroy(&gsi->mutex);
> > gsi_channel_exit(gsi);
> > @@ -2277,7 +2293,7 @@ void gsi_exit(struct ipa_dma *gsi)
> > * substantially reduce pool memory requirements. The number we
> > * reduce it by matches the number added in ipa_trans_pool_init().
> > */
> > -u32 gsi_channel_tre_max(struct ipa_dma *gsi, u32 channel_id)
> > +static u32 gsi_channel_tre_max(struct ipa_dma *gsi, u32 channel_id)
> > {
> > struct ipa_channel *channel = &gsi->channel[channel_id];
> >
> > @@ -2286,7 +2302,7 @@ u32 gsi_channel_tre_max(struct ipa_dma *gsi, u32 channel_id)
> > }
> >
> > /* Returns the maximum number of TREs in a single transaction for a channel */
> > -u32 gsi_channel_trans_tre_max(struct ipa_dma *gsi, u32 channel_id)
> > +static u32 gsi_channel_trans_tre_max(struct ipa_dma *gsi, u32 channel_id)
> > {
> > struct ipa_channel *channel = &gsi->channel[channel_id];
> >
> > diff --git a/drivers/net/ipa/ipa_dma.h b/drivers/net/ipa/ipa_dma.h
> > index d053929ca3e3..1a23e6ac5785 100644
> > --- a/drivers/net/ipa/ipa_dma.h
> > +++ b/drivers/net/ipa/ipa_dma.h
> > @@ -163,64 +163,96 @@ struct ipa_dma {
> > struct completion completion; /* for global EE commands */
> > int result; /* Negative errno (generic commands) */
> > struct mutex mutex; /* protects commands, programming */
> > +
> > + int (*setup)(struct ipa_dma *dma_subsys);
> > + void (*teardown)(struct ipa_dma *dma_subsys);
> > + void (*exit)(struct ipa_dma *dma_subsys);
> > + void (*suspend)(struct ipa_dma *dma_subsys);
> > + void (*resume)(struct ipa_dma *dma_subsys);
> > + u32 (*channel_tre_max)(struct ipa_dma *dma_subsys, u32 channel_id);
> > + u32 (*channel_trans_tre_max)(struct ipa_dma *dma_subsys, u32 channel_id);
> > + int (*channel_start)(struct ipa_dma *dma_subsys, u32 channel_id);
> > + int (*channel_stop)(struct ipa_dma *dma_subsys, u32 channel_id);
> > + void (*channel_reset)(struct ipa_dma *dma_subsys, u32 channel_id, bool doorbell);
> > + int (*channel_suspend)(struct ipa_dma *dma_subsys, u32 channel_id);
> > + int (*channel_resume)(struct ipa_dma *dma_subsys, u32 channel_id);
> > + void (*trans_commit)(struct ipa_trans *trans, bool ring_db);
> > };
> >
> > /**
> > - * gsi_setup() - Set up the GSI subsystem
> > - * @gsi: Address of GSI structure embedded in an IPA structure
> > + * ipa_dma_setup() - Set up the DMA subsystem
> > + * @dma_subsys: Address of ipa_dma structure embedded in an IPA structure
> > *
> > * Return: 0 if successful, or a negative error code
> > *
> > - * Performs initialization that must wait until the GSI hardware is
> > + * Performs initialization that must wait until the GSI/BAM hardware is
> > * ready (including firmware loaded).
> > */
> > -int gsi_setup(struct ipa_dma *dma_subsys);
> > +static inline int ipa_dma_setup(struct ipa_dma *dma_subsys)
> > +{
> > + return dma_subsys->setup(dma_subsys);
> > +}
> >
> > /**
> > - * gsi_teardown() - Tear down GSI subsystem
> > - * @gsi: GSI address previously passed to a successful gsi_setup() call
> > + * ipa_dma_teardown() - Tear down DMA subsystem
> > + * @dma_subsys: ipa_dma address previously passed to a successful ipa_dma_setup() call
> > */
> > -void gsi_teardown(struct ipa_dma *dma_subsys);
> > +static inline void ipa_dma_teardown(struct ipa_dma *dma_subsys)
> > +{
> > + dma_subsys->teardown(dma_subsys);
> > +}
> >
> > /**
> > - * gsi_channel_tre_max() - Channel maximum number of in-flight TREs
> > - * @gsi: GSI pointer
> > + * ipa_channel_tre_max() - Channel maximum number of in-flight TREs
> > + * @dma_subsys: pointer to ipa_dma structure
> > * @channel_id: Channel whose limit is to be returned
> > *
> > * Return: The maximum number of TREs oustanding on the channel
> > */
> > -u32 gsi_channel_tre_max(struct ipa_dma *dma_subsys, u32 channel_id);
> > +static inline u32 ipa_channel_tre_max(struct ipa_dma *dma_subsys, u32 channel_id)
> > +{
> > + return dma_subsys->channel_tre_max(dma_subsys, channel_id);
> > +}
> >
> > /**
> > - * gsi_channel_trans_tre_max() - Maximum TREs in a single transaction
> > - * @gsi: GSI pointer
> > + * ipa_channel_trans_tre_max() - Maximum TREs in a single transaction
> > + * @dma_subsys: pointer to ipa_dma structure
> > * @channel_id: Channel whose limit is to be returned
> > *
> > * Return: The maximum TRE count per transaction on the channel
> > */
> > -u32 gsi_channel_trans_tre_max(struct ipa_dma *dma_subsys, u32 channel_id);
> > +static inline u32 ipa_channel_trans_tre_max(struct ipa_dma *dma_subsys, u32 channel_id)
> > +{
> > + return dma_subsys->channel_trans_tre_max(dma_subsys, channel_id);
> > +}
> >
> > /**
> > - * gsi_channel_start() - Start an allocated GSI channel
> > - * @gsi: GSI pointer
> > + * ipa_channel_start() - Start an allocated DMA channel
> > + * @dma_subsys: pointer to ipa_dma structure
> > * @channel_id: Channel to start
> > *
> > * Return: 0 if successful, or a negative error code
> > */
> > -int gsi_channel_start(struct ipa_dma *dma_subsys, u32 channel_id);
> > +static inline int ipa_channel_start(struct ipa_dma *dma_subsys, u32 channel_id)
> > +{
> > + return dma_subsys->channel_start(dma_subsys, channel_id);
> > +}
> >
> > /**
> > - * gsi_channel_stop() - Stop a started GSI channel
> > - * @gsi: GSI pointer returned by gsi_setup()
> > + * ipa_channel_stop() - Stop a started DMA channel
> > + * @dma_subsys: pointer to ipa_dma structure returned by ipa_dma_setup()
> > * @channel_id: Channel to stop
> > *
> > * Return: 0 if successful, or a negative error code
> > */
> > -int gsi_channel_stop(struct ipa_dma *dma_subsys, u32 channel_id);
> > +static inline int ipa_channel_stop(struct ipa_dma *dma_subsys, u32 channel_id)
> > +{
> > + return dma_subsys->channel_stop(dma_subsys, channel_id);
> > +}
> >
> > /**
> > - * gsi_channel_reset() - Reset an allocated GSI channel
> > - * @gsi: GSI pointer
> > + * ipa_channel_reset() - Reset an allocated DMA channel
> > + * @dma_subsys: pointer to ipa_dma structure
> > * @channel_id: Channel to be reset
> > * @doorbell: Whether to (possibly) enable the doorbell engine
> > *
> > @@ -230,41 +262,49 @@ int gsi_channel_stop(struct ipa_dma *dma_subsys, u32 channel_id);
> > * GSI hardware relinquishes ownership of all pending receive buffer
> > * transactions and they will complete with their cancelled flag set.
> > */
> > -void gsi_channel_reset(struct ipa_dma *dma_subsys, u32 channel_id, bool doorbell);
> > +static inline void ipa_channel_reset(struct ipa_dma *dma_subsys, u32 channel_id, bool doorbell)
> > +{
> > + dma_subsys->channel_reset(dma_subsys, channel_id, doorbell);
> > +}
> >
> > -/**
> > - * gsi_suspend() - Prepare the GSI subsystem for suspend
> > - * @gsi: GSI pointer
> > - */
> > -void gsi_suspend(struct ipa_dma *dma_subsys);
> >
> > /**
> > - * gsi_resume() - Resume the GSI subsystem following suspend
> > - * @gsi: GSI pointer
> > - */
> > -void gsi_resume(struct ipa_dma *dma_subsys);
> > -
> > -/**
> > - * gsi_channel_suspend() - Suspend a GSI channel
> > - * @gsi: GSI pointer
> > + * ipa_channel_suspend() - Suspend a DMA channel
> > + * @dma_subsys: pointer to ipa_dma structure
> > * @channel_id: Channel to suspend
> > *
> > * For IPA v4.0+, suspend is implemented by stopping the channel.
> > */
> > -int gsi_channel_suspend(struct ipa_dma *dma_subsys, u32 channel_id);
> > +static inline int ipa_channel_suspend(struct ipa_dma *dma_subsys, u32 channel_id)
> > +{
> > + return dma_subsys->channel_suspend(dma_subsys, channel_id);
> > +}
> >
> > /**
> > - * gsi_channel_resume() - Resume a suspended GSI channel
> > - * @gsi: GSI pointer
> > + * ipa_channel_resume() - Resume a suspended DMA channel
> > + * @dma_subsys: pointer to ipa_dma structure
> > * @channel_id: Channel to resume
> > *
> > * For IPA v4.0+, the stopped channel is started again.
> > */
> > -int gsi_channel_resume(struct ipa_dma *dma_subsys, u32 channel_id);
> > +static inline int ipa_channel_resume(struct ipa_dma *dma_subsys, u32 channel_id)
> > +{
> > + return dma_subsys->channel_resume(dma_subsys, channel_id);
> > +}
> > +
> > +static inline void ipa_dma_suspend(struct ipa_dma *dma_subsys)
> > +{
> > + return dma_subsys->suspend(dma_subsys);
> > +}
> > +
> > +static inline void ipa_dma_resume(struct ipa_dma *dma_subsys)
> > +{
> > + return dma_subsys->resume(dma_subsys);
> > +}
> >
> > /**
> > - * gsi_init() - Initialize the GSI subsystem
> > - * @gsi: Address of GSI structure embedded in an IPA structure
> > + * ipa_dma_init() - Initialize the GSI subsystem
> > + * @dma_subsys: Address of ipa_dma structure embedded in an IPA structure
> > * @pdev: IPA platform device
> > * @version: IPA hardware version (implies GSI version)
> > * @count: Number of entries in the configuration data array
> > @@ -275,14 +315,19 @@ int gsi_channel_resume(struct ipa_dma *dma_subsys, u32 channel_id);
> > * Early stage initialization of the GSI subsystem, performing tasks
> > * that can be done before the GSI hardware is ready to use.
> > */
> > +
> > int gsi_init(struct ipa_dma *dma_subsys, struct platform_device *pdev,
> > enum ipa_version version, u32 count,
> > const struct ipa_gsi_endpoint_data *data);
> >
> > /**
> > - * gsi_exit() - Exit the GSI subsystem
> > - * @gsi: GSI address previously passed to a successful gsi_init() call
> > + * ipa_dma_exit() - Exit the DMA subsystem
> > + * @dma_subsys: ipa_dma address previously passed to a successful gsi_init() call
> > */
> > -void gsi_exit(struct ipa_dma *dma_subsys);
> > +static inline void ipa_dma_exit(struct ipa_dma *dma_subsys)
> > +{
> > + if (dma_subsys)
> > + dma_subsys->exit(dma_subsys);
> > +}
> >
> > #endif /* _GSI_H_ */
> > diff --git a/drivers/net/ipa/ipa_endpoint.c b/drivers/net/ipa/ipa_endpoint.c
> > index 90d6880e8a25..dbef549c4537 100644
> > --- a/drivers/net/ipa/ipa_endpoint.c
> > +++ b/drivers/net/ipa/ipa_endpoint.c
> > @@ -1091,7 +1091,7 @@ static void ipa_endpoint_replenish(struct ipa_endpoint *endpoint, bool add_one)
> > * try replenishing again if our backlog is *all* available TREs.
> > */
> > gsi = &endpoint->ipa->dma_subsys;
> > - if (backlog == gsi_channel_tre_max(gsi, endpoint->channel_id))
> > + if (backlog == ipa_channel_tre_max(gsi, endpoint->channel_id))
> > schedule_delayed_work(&endpoint->replenish_work,
> > msecs_to_jiffies(1));
> > }
> > @@ -1107,7 +1107,7 @@ static void ipa_endpoint_replenish_enable(struct ipa_endpoint *endpoint)
> > atomic_add(saved, &endpoint->replenish_backlog);
> >
> > /* Start replenishing if hardware currently has no buffers */
> > - max_backlog = gsi_channel_tre_max(gsi, endpoint->channel_id);
> > + max_backlog = ipa_channel_tre_max(gsi, endpoint->channel_id);
> > if (atomic_read(&endpoint->replenish_backlog) == max_backlog)
> > ipa_endpoint_replenish(endpoint, false);
> > }
> > @@ -1432,13 +1432,13 @@ static int ipa_endpoint_reset_rx_aggr(struct ipa_endpoint *endpoint)
> > * active. We'll re-enable the doorbell (if appropriate) when
> > * we reset again below.
> > */
> > - gsi_channel_reset(gsi, endpoint->channel_id, false);
> > + ipa_channel_reset(gsi, endpoint->channel_id, false);
> >
> > /* Make sure the channel isn't suspended */
> > suspended = ipa_endpoint_program_suspend(endpoint, false);
> >
> > /* Start channel and do a 1 byte read */
> > - ret = gsi_channel_start(gsi, endpoint->channel_id);
> > + ret = ipa_channel_start(gsi, endpoint->channel_id);
> > if (ret)
> > goto out_suspend_again;
> >
> > @@ -1461,7 +1461,7 @@ static int ipa_endpoint_reset_rx_aggr(struct ipa_endpoint *endpoint)
> >
> > gsi_trans_read_byte_done(gsi, endpoint->channel_id);
> >
> > - ret = gsi_channel_stop(gsi, endpoint->channel_id);
> > + ret = ipa_channel_stop(gsi, endpoint->channel_id);
> > if (ret)
> > goto out_suspend_again;
> >
> > @@ -1470,14 +1470,14 @@ static int ipa_endpoint_reset_rx_aggr(struct ipa_endpoint *endpoint)
> > * complete the channel reset sequence. Finish by suspending the
> > * channel again (if necessary).
> > */
> > - gsi_channel_reset(gsi, endpoint->channel_id, true);
> > + ipa_channel_reset(gsi, endpoint->channel_id, true);
> >
> > usleep_range(USEC_PER_MSEC, 2 * USEC_PER_MSEC);
> >
> > goto out_suspend_again;
> >
> > err_endpoint_stop:
> > - (void)gsi_channel_stop(gsi, endpoint->channel_id);
> > + (void)ipa_channel_stop(gsi, endpoint->channel_id);
> > out_suspend_again:
> > if (suspended)
> > (void)ipa_endpoint_program_suspend(endpoint, true);
> > @@ -1504,7 +1504,7 @@ static void ipa_endpoint_reset(struct ipa_endpoint *endpoint)
> > if (special && ipa_endpoint_aggr_active(endpoint))
> > ret = ipa_endpoint_reset_rx_aggr(endpoint);
> > else
> > - gsi_channel_reset(&ipa->dma_subsys, channel_id, true);
> > + ipa_channel_reset(&ipa->dma_subsys, channel_id, true);
> >
> > if (ret)
> > dev_err(&ipa->pdev->dev,
> > @@ -1537,7 +1537,7 @@ int ipa_endpoint_enable_one(struct ipa_endpoint *endpoint)
> > struct ipa_dma *gsi = &ipa->dma_subsys;
> > int ret;
> >
> > - ret = gsi_channel_start(gsi, endpoint->channel_id);
> > + ret = ipa_channel_start(gsi, endpoint->channel_id);
> > if (ret) {
> > dev_err(&ipa->pdev->dev,
> > "error %d starting %cX channel %u for endpoint %u\n",
> > @@ -1576,7 +1576,7 @@ void ipa_endpoint_disable_one(struct ipa_endpoint *endpoint)
> > }
> >
> > /* Note that if stop fails, the channel's state is not well-defined */
> > - ret = gsi_channel_stop(gsi, endpoint->channel_id);
> > + ret = ipa_channel_stop(gsi, endpoint->channel_id);
> > if (ret)
> > dev_err(&ipa->pdev->dev,
> > "error %d attempting to stop endpoint %u\n", ret,
> > @@ -1598,7 +1598,7 @@ void ipa_endpoint_suspend_one(struct ipa_endpoint *endpoint)
> > (void)ipa_endpoint_program_suspend(endpoint, true);
> > }
> >
> > - ret = gsi_channel_suspend(gsi, endpoint->channel_id);
> > + ret = ipa_channel_suspend(gsi, endpoint->channel_id);
> > if (ret)
> > dev_err(dev, "error %d suspending channel %u\n", ret,
> > endpoint->channel_id);
> > @@ -1617,7 +1617,7 @@ void ipa_endpoint_resume_one(struct ipa_endpoint *endpoint)
> > if (!endpoint->toward_ipa)
> > (void)ipa_endpoint_program_suspend(endpoint, false);
> >
> > - ret = gsi_channel_resume(gsi, endpoint->channel_id);
> > + ret = ipa_channel_resume(gsi, endpoint->channel_id);
> > if (ret)
> > dev_err(dev, "error %d resuming channel %u\n", ret,
> > endpoint->channel_id);
> > @@ -1660,14 +1660,14 @@ static void ipa_endpoint_setup_one(struct ipa_endpoint *endpoint)
> > if (endpoint->ee_id != GSI_EE_AP)
> > return;
> >
> > - endpoint->trans_tre_max = gsi_channel_trans_tre_max(gsi, channel_id);
> > + endpoint->trans_tre_max = ipa_channel_trans_tre_max(gsi, channel_id);
> > if (!endpoint->toward_ipa) {
> > /* RX transactions require a single TRE, so the maximum
> > * backlog is the same as the maximum outstanding TREs.
> > */
> > endpoint->replenish_enabled = false;
> > atomic_set(&endpoint->replenish_saved,
> > - gsi_channel_tre_max(gsi, endpoint->channel_id));
> > + ipa_channel_tre_max(gsi, endpoint->channel_id));
> > atomic_set(&endpoint->replenish_backlog, 0);
> > INIT_DELAYED_WORK(&endpoint->replenish_work,
> > ipa_endpoint_replenish_work);
> > diff --git a/drivers/net/ipa/ipa_main.c b/drivers/net/ipa/ipa_main.c
> > index 026f5555fa7d..6ab691ff1faf 100644
> > --- a/drivers/net/ipa/ipa_main.c
> > +++ b/drivers/net/ipa/ipa_main.c
> > @@ -98,13 +98,13 @@ int ipa_setup(struct ipa *ipa)
> > struct device *dev = &ipa->pdev->dev;
> > int ret;
> >
> > - ret = gsi_setup(&ipa->dma_subsys);
> > + ret = ipa_dma_setup(&ipa->dma_subsys);
> > if (ret)
> > return ret;
> >
> > ret = ipa_power_setup(ipa);
> > if (ret)
> > - goto err_gsi_teardown;
> > + goto err_dma_teardown;
> >
> > ipa_endpoint_setup(ipa);
> >
> > @@ -153,8 +153,8 @@ int ipa_setup(struct ipa *ipa)
> > err_endpoint_teardown:
> > ipa_endpoint_teardown(ipa);
> > ipa_power_teardown(ipa);
> > -err_gsi_teardown:
> > - gsi_teardown(&ipa->dma_subsys);
> > +err_dma_teardown:
> > + ipa_dma_teardown(&ipa->dma_subsys);
> >
> > return ret;
> > }
> > @@ -179,7 +179,7 @@ static void ipa_teardown(struct ipa *ipa)
> > ipa_endpoint_disable_one(command_endpoint);
> > ipa_endpoint_teardown(ipa);
> > ipa_power_teardown(ipa);
> > - gsi_teardown(&ipa->dma_subsys);
> > + ipa_dma_teardown(&ipa->dma_subsys);
> > }
> >
> > /* Configure bus access behavior for IPA components */
> > @@ -726,7 +726,7 @@ static int ipa_probe(struct platform_device *pdev)
> > data->endpoint_data);
> > if (!ipa->filter_map) {
> > ret = -EINVAL;
> > - goto err_gsi_exit;
> > + goto err_dma_exit;
> > }
> >
> > ret = ipa_table_init(ipa);
> > @@ -780,8 +780,8 @@ static int ipa_probe(struct platform_device *pdev)
> > ipa_table_exit(ipa);
> > err_endpoint_exit:
> > ipa_endpoint_exit(ipa);
> > -err_gsi_exit:
> > - gsi_exit(&ipa->dma_subsys);
> > +err_dma_exit:
> > + ipa_dma_exit(&ipa->dma_subsys);
> > err_mem_exit:
> > ipa_mem_exit(ipa);
> > err_reg_exit:
> > @@ -824,7 +824,7 @@ static int ipa_remove(struct platform_device *pdev)
> > ipa_modem_exit(ipa);
> > ipa_table_exit(ipa);
> > ipa_endpoint_exit(ipa);
> > - gsi_exit(&ipa->dma_subsys);
> > + ipa_dma_exit(&ipa->dma_subsys);
> > ipa_mem_exit(ipa);
> > ipa_reg_exit(ipa);
> > kfree(ipa);
> > diff --git a/drivers/net/ipa/ipa_power.c b/drivers/net/ipa/ipa_power.c
> > index b1c6c0fcb654..096cfb8ae9a5 100644
> > --- a/drivers/net/ipa/ipa_power.c
> > +++ b/drivers/net/ipa/ipa_power.c
> > @@ -243,7 +243,7 @@ static int ipa_runtime_suspend(struct device *dev)
> > if (ipa->setup_complete) {
> > __clear_bit(IPA_POWER_FLAG_RESUMED, ipa->power->flags);
> > ipa_endpoint_suspend(ipa);
> > - gsi_suspend(&ipa->gsi);
> > + ipa_dma_suspend(&ipa->dma_subsys);
> > }
> >
> > return ipa_power_disable(ipa);
> > @@ -260,7 +260,7 @@ static int ipa_runtime_resume(struct device *dev)
> >
> > /* Endpoints aren't usable until setup is complete */
> > if (ipa->setup_complete) {
> > - gsi_resume(&ipa->gsi);
> > + ipa_dma_resume(&ipa->dma_subsys);
> > ipa_endpoint_resume(ipa);
> > }
> >
> > diff --git a/drivers/net/ipa/ipa_trans.c b/drivers/net/ipa/ipa_trans.c
> > index b87936b18770..22755f3ce3da 100644
> > --- a/drivers/net/ipa/ipa_trans.c
> > +++ b/drivers/net/ipa/ipa_trans.c
> > @@ -747,7 +747,7 @@ int ipa_channel_trans_init(struct ipa_dma *gsi, u32 channel_id)
> > * for transactions (including transaction structures) based on
> > * this maximum number.
> > */
> > - tre_max = gsi_channel_tre_max(channel->dma_subsys, channel_id);
> > + tre_max = ipa_channel_tre_max(channel->dma_subsys, channel_id);
> >
> > /* Transactions are allocated one at a time. */
> > ret = ipa_trans_pool_init(&trans_info->pool, sizeof(struct ipa_trans),
> >
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