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mhi: pci_generic: Enable burst mode for hardware channels 

Hardware channels have a feature called burst mode that allows to
queue transfer ring element(s) (TRE) to a channel without ringing
the device doorbell. In that mode, the device is polling the channel
context for new elements. This reduces the frequency of host initiated
doorbells and increase throughput.

Create a new dedicated macro for hardware channels with burst enabled.

Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
This commit is contained in:
Loic Poulain 2021-01-04 17:14:52 +01:00 committed by Manivannan Sadhasivam
parent d9f23ea69d
commit eb96787a5d
1 changed files with 32 additions and 2 deletions
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34
drivers/bus/mhi/pci_generic.c
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@ -76,6 +76,36 @@ struct mhi_pci_dev_info {
.offload_channel = false, \
}
#define MHI_CHANNEL_CONFIG_HW_UL(ch_num, ch_name, el_count, ev_ring) \
{ \
.num = ch_num, \
.name = ch_name, \
.num_elements = el_count, \
.event_ring = ev_ring, \
.dir = DMA_TO_DEVICE, \
.ee_mask = BIT(MHI_EE_AMSS), \
.pollcfg = 0, \
.doorbell = MHI_DB_BRST_ENABLE, \
.lpm_notify = false, \
.offload_channel = false, \
.doorbell_mode_switch = true, \
} \
#define MHI_CHANNEL_CONFIG_HW_DL(ch_num, ch_name, el_count, ev_ring) \
{ \
.num = ch_num, \
.name = ch_name, \
.num_elements = el_count, \
.event_ring = ev_ring, \
.dir = DMA_FROM_DEVICE, \
.ee_mask = BIT(MHI_EE_AMSS), \
.pollcfg = 0, \
.doorbell = MHI_DB_BRST_ENABLE, \
.lpm_notify = false, \
.offload_channel = false, \
.doorbell_mode_switch = true, \
}
#define MHI_EVENT_CONFIG_DATA(ev_ring) \
{ \
.num_elements = 128, \
@ -110,8 +140,8 @@ static const struct mhi_channel_config modem_qcom_v1_mhi_channels[] = {
MHI_CHANNEL_CONFIG_DL(15, "QMI", 4, 0),
MHI_CHANNEL_CONFIG_UL(20, "IPCR", 8, 0),
MHI_CHANNEL_CONFIG_DL(21, "IPCR", 8, 0),
MHI_CHANNEL_CONFIG_UL(100, "IP_HW0", 128, 1),
MHI_CHANNEL_CONFIG_DL(101, "IP_HW0", 128, 2),
MHI_CHANNEL_CONFIG_HW_UL(100, "IP_HW0", 128, 1),
MHI_CHANNEL_CONFIG_HW_DL(101, "IP_HW0", 128, 2),
};
static const struct mhi_event_config modem_qcom_v1_mhi_events[] = {