| Message ID | 20220802075533.1744-3-quic_bqiang@quicinc.com |
|---|---|
| State | New |
| Headers | show |
| Series | wifi: ath11k: Add support for sram dump | expand |
Baochen Qiang <quic_bqiang@quicinc.com> writes: > Currently this feature is enabled for QCA6390/WCN6855. > > Tested-on: QCA6390 hw2.0 PCI WLAN.HST.1.0.1-01740-QCAHSTSWPLZ_V2_TO_X86-1 > Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-01720.1-QCAHSPSWPL_V1_V2_SILICONZ_LITE-1 > > Signed-off-by: Baochen Qiang <quic_bqiang@quicinc.com> I did quite a few changes to this patch in the pending branch, please check my changes: https://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git/commit/?h=pending&id=074477aacb419493da6fb4d96fa9d12390c3b40e I improved the commit log. > --- a/drivers/net/wireless/ath/ath11k/hw.h > +++ b/drivers/net/wireless/ath/ath11k/hw.h > @@ -126,6 +126,11 @@ struct ath11k_hw_hal_params { > enum hal_rx_buf_return_buf_manager rx_buf_rbm; > }; > > +struct ath11k_hw_sram_dump { > + u32 start; > + u32 end; > +}; > + > struct ath11k_hw_params { > const char *name; > u16 hw_rev; > @@ -200,6 +205,7 @@ struct ath11k_hw_params { > bool hybrid_bus_type; > bool fixed_fw_mem; > bool support_off_channel_tx; > + const struct ath11k_hw_sram_dump *sram_dump; > }; Instead of separate structures I used inline structures: .sram_dump = { .start = 0x01400000, .end = 0x0177ffff, }, > --- a/drivers/net/wireless/ath/ath11k/pcic.c > +++ b/drivers/net/wireless/ath/ath11k/pcic.c > @@ -203,6 +203,35 @@ u32 ath11k_pcic_read32(struct ath11k_base *ab, u32 offset) > } > EXPORT_SYMBOL(ath11k_pcic_read32); > > +int ath11k_pcic_dump_sram(struct ath11k_base *ab, u8 *buf, > + u32 start, u32 end) > +{ > + int ret = 0; > + bool wakeup_required; > + u32 *data = (u32 *)buf; I changed buf to a void pointer, then the cast is not needed. > + u32 i; > + > + /* for offset beyond BAR + 4K - 32, may > + * need to wakeup the device to access. > + */ > + wakeup_required = test_bit(ATH11K_FLAG_DEVICE_INIT_DONE, &ab->dev_flags) && > + end >= ATH11K_PCI_ACCESS_ALWAYS_OFF; > + if (wakeup_required && ab->pci.ops->wakeup) { > + ret = ab->pci.ops->wakeup(ab); > + if (ret) > + ath11k_warn(ab, "%s: failed to do wakeup: %d\n", __func__, ret); > + } I changed the error handling so that if wakeup() fails we do not continue and just return an error. > + for (i = start; i < end + 1; i += 4) > + *data++ = ath11k_pcic_do_read32(ab, i); > + > + if (wakeup_required && !ret && ab->pci.ops->release) > + ab->pci.ops->release(ab); At the same time I removed the ret check here. > + > + return 0; > +} > +EXPORT_SYMBOL(ath11k_pcic_dump_sram); I renamed this to ath11k_pcic_read() as I feel it's more descriptive what the function really does. It's not really care is this for sram dump or something else. I also renamed hif.h interface to ath11k_hif_read().
On 9/9/2022 6:48 PM, Kalle Valo wrote: > Baochen Qiang <quic_bqiang@quicinc.com> writes: > >> Currently this feature is enabled for QCA6390/WCN6855. >> >> Tested-on: QCA6390 hw2.0 PCI WLAN.HST.1.0.1-01740-QCAHSTSWPLZ_V2_TO_X86-1 >> Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-01720.1-QCAHSPSWPL_V1_V2_SILICONZ_LITE-1 >> >> Signed-off-by: Baochen Qiang <quic_bqiang@quicinc.com> > I did quite a few changes to this patch in the pending branch, please > check my changes: > > https://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git/commit/?h=pending&id=074477aacb419493da6fb4d96fa9d12390c3b40e > > I improved the commit log. > >> --- a/drivers/net/wireless/ath/ath11k/hw.h >> +++ b/drivers/net/wireless/ath/ath11k/hw.h >> @@ -126,6 +126,11 @@ struct ath11k_hw_hal_params { >> enum hal_rx_buf_return_buf_manager rx_buf_rbm; >> }; >> >> +struct ath11k_hw_sram_dump { >> + u32 start; >> + u32 end; >> +}; >> + >> struct ath11k_hw_params { >> const char *name; >> u16 hw_rev; >> @@ -200,6 +205,7 @@ struct ath11k_hw_params { >> bool hybrid_bus_type; >> bool fixed_fw_mem; >> bool support_off_channel_tx; >> + const struct ath11k_hw_sram_dump *sram_dump; >> }; > Instead of separate structures I used inline structures: > > .sram_dump = { > .start = 0x01400000, > .end = 0x0177ffff, > }, > >> --- a/drivers/net/wireless/ath/ath11k/pcic.c >> +++ b/drivers/net/wireless/ath/ath11k/pcic.c >> @@ -203,6 +203,35 @@ u32 ath11k_pcic_read32(struct ath11k_base *ab, u32 offset) >> } >> EXPORT_SYMBOL(ath11k_pcic_read32); >> >> +int ath11k_pcic_dump_sram(struct ath11k_base *ab, u8 *buf, >> + u32 start, u32 end) >> +{ >> + int ret = 0; >> + bool wakeup_required; >> + u32 *data = (u32 *)buf; > I changed buf to a void pointer, then the cast is not needed. > >> + u32 i; >> + >> + /* for offset beyond BAR + 4K - 32, may >> + * need to wakeup the device to access. >> + */ >> + wakeup_required = test_bit(ATH11K_FLAG_DEVICE_INIT_DONE, &ab->dev_flags) && >> + end >= ATH11K_PCI_ACCESS_ALWAYS_OFF; >> + if (wakeup_required && ab->pci.ops->wakeup) { >> + ret = ab->pci.ops->wakeup(ab); >> + if (ret) >> + ath11k_warn(ab, "%s: failed to do wakeup: %d\n", __func__, ret); >> + } > I changed the error handling so that if wakeup() fails we do not > continue and just return an error. I prefer to keep the original design, because in that case we still have something to check after firmware crashes. I admit that the dump content may be invalid if wakeup fails, but we can know that by checking kernel log, so we can avoid misleading. > >> + for (i = start; i < end + 1; i += 4) >> + *data++ = ath11k_pcic_do_read32(ab, i); >> + >> + if (wakeup_required && !ret && ab->pci.ops->release) >> + ab->pci.ops->release(ab); > At the same time I removed the ret check here. > >> + >> + return 0; >> +} >> +EXPORT_SYMBOL(ath11k_pcic_dump_sram); > I renamed this to ath11k_pcic_read() as I feel it's more descriptive > what the function really does. It's not really care is this for sram > dump or something else. > > I also renamed hif.h interface to ath11k_hif_read(). >
Baochen Qiang <quic_bqiang@quicinc.com> writes: >>> + u32 i; >>> + >>> + /* for offset beyond BAR + 4K - 32, may >>> + * need to wakeup the device to access. >>> + */ >>> + wakeup_required = test_bit(ATH11K_FLAG_DEVICE_INIT_DONE, &ab->dev_flags) && >>> + end >= ATH11K_PCI_ACCESS_ALWAYS_OFF; >>> + if (wakeup_required && ab->pci.ops->wakeup) { >>> + ret = ab->pci.ops->wakeup(ab); >>> + if (ret) >>> + ath11k_warn(ab, "%s: failed to do wakeup: %d\n", __func__, ret); >>> + } >> >> I changed the error handling so that if wakeup() fails we do not >> continue and just return an error. > > I prefer to keep the original design, because in that case we still > have something to check after firmware crashes. > > I admit that the dump content may be invalid if wakeup fails, but we > can know that by checking kernel log, so we can avoid misleading. Too late now, I already applied the patch. You need to submit a new patch to change the logic. And if we really want to ignore the wakeup failure there should be a proper comment in the code explaining the idea, and maybe improve the warning message to make it more understandable for the user.
On 9/13/2022 3:14 PM, Kalle Valo wrote: > Baochen Qiang <quic_bqiang@quicinc.com> writes: > >>>> + u32 i; >>>> + >>>> + /* for offset beyond BAR + 4K - 32, may >>>> + * need to wakeup the device to access. >>>> + */ >>>> + wakeup_required = test_bit(ATH11K_FLAG_DEVICE_INIT_DONE, &ab->dev_flags) && >>>> + end >= ATH11K_PCI_ACCESS_ALWAYS_OFF; >>>> + if (wakeup_required && ab->pci.ops->wakeup) { >>>> + ret = ab->pci.ops->wakeup(ab); >>>> + if (ret) >>>> + ath11k_warn(ab, "%s: failed to do wakeup: %d\n", __func__, ret); >>>> + } >>> I changed the error handling so that if wakeup() fails we do not >>> continue and just return an error. >> I prefer to keep the original design, because in that case we still >> have something to check after firmware crashes. >> >> I admit that the dump content may be invalid if wakeup fails, but we >> can know that by checking kernel log, so we can avoid misleading. > Too late now, I already applied the patch. You need to submit a new > patch to change the logic. And if we really want to ignore the wakeup > failure there should be a proper comment in the code explaining the idea, > and maybe improve the warning message to make it more understandable for > the user. Sure Kalle, I will send a new patch for that.
diff --git a/drivers/net/wireless/ath/ath11k/core.c b/drivers/net/wireless/ath/ath11k/core.c index c3e9e4f7bc24..44003d39ff7b 100644 --- a/drivers/net/wireless/ath/ath11k/core.c +++ b/drivers/net/wireless/ath/ath11k/core.c @@ -106,6 +106,7 @@ static const struct ath11k_hw_params ath11k_hw_params[] = { .hybrid_bus_type = false, .fixed_fw_mem = false, .support_off_channel_tx = false, + .sram_dump = NULL, }, { .hw_rev = ATH11K_HW_IPQ6018_HW10, @@ -177,6 +178,7 @@ static const struct ath11k_hw_params ath11k_hw_params[] = { .hybrid_bus_type = false, .fixed_fw_mem = false, .support_off_channel_tx = false, + .sram_dump = NULL, }, { .name = "qca6390 hw2.0", @@ -247,6 +249,7 @@ static const struct ath11k_hw_params ath11k_hw_params[] = { .hybrid_bus_type = false, .fixed_fw_mem = false, .support_off_channel_tx = true, + .sram_dump = &sram_dump_qca6390, }, { .name = "qcn9074 hw1.0", @@ -317,6 +320,7 @@ static const struct ath11k_hw_params ath11k_hw_params[] = { .hybrid_bus_type = false, .fixed_fw_mem = false, .support_off_channel_tx = false, + .sram_dump = NULL, }, { .name = "wcn6855 hw2.0", @@ -387,6 +391,7 @@ static const struct ath11k_hw_params ath11k_hw_params[] = { .hybrid_bus_type = false, .fixed_fw_mem = false, .support_off_channel_tx = true, + .sram_dump = &sram_dump_wcn6855, }, { .name = "wcn6855 hw2.1", @@ -456,6 +461,7 @@ static const struct ath11k_hw_params ath11k_hw_params[] = { .hybrid_bus_type = false, .fixed_fw_mem = false, .support_off_channel_tx = true, + .sram_dump = &sram_dump_wcn6855, }, { .name = "wcn6750 hw1.0", @@ -525,6 +531,7 @@ static const struct ath11k_hw_params ath11k_hw_params[] = { .hybrid_bus_type = true, .fixed_fw_mem = true, .support_off_channel_tx = false, + .sram_dump = NULL, }, }; diff --git a/drivers/net/wireless/ath/ath11k/debugfs.c b/drivers/net/wireless/ath/ath11k/debugfs.c index 9648e0017393..ff7b35ac4154 100644 --- a/drivers/net/wireless/ath/ath11k/debugfs.c +++ b/drivers/net/wireless/ath/ath11k/debugfs.c @@ -14,6 +14,7 @@ #include "dp_tx.h" #include "debugfs_htt_stats.h" #include "peer.h" +#include "hif.h" static const char *htt_bp_umac_ring[HTT_SW_UMAC_RING_IDX_MAX] = { "REO2SW1_RING", @@ -982,6 +983,63 @@ static const struct file_operations fops_fw_dbglog = { .llseek = default_llseek, }; +static int ath11k_open_sram_dump(struct inode *inode, struct file *file) +{ + struct ath11k_base *ab = inode->i_private; + u8 *buf; + u32 start, end; + int ret; + + start = ab->hw_params.sram_dump->start; + end = ab->hw_params.sram_dump->end; + + buf = vmalloc(end - start + 1); + if (!buf) + return -ENOMEM; + + ret = ath11k_hif_dump_sram(ab, buf, start, end); + if (ret) { + ath11k_err(ab, "failed to dump sram: %d\n", ret); + vfree(buf); + return ret; + } + + file->private_data = buf; + return 0; +} + +static ssize_t ath11k_read_sram_dump(struct file *file, + char __user *user_buf, + size_t count, loff_t *ppos) +{ + struct ath11k_base *ab = file->f_inode->i_private; + const char *buf = file->private_data; + int len; + u32 start, end; + + start = ab->hw_params.sram_dump->start; + end = ab->hw_params.sram_dump->end; + len = end - start + 1; + + return simple_read_from_buffer(user_buf, count, ppos, buf, len); +} + +static int ath11k_release_sram_dump(struct inode *inode, struct file *file) +{ + vfree(file->private_data); + file->private_data = NULL; + + return 0; +} + +static const struct file_operations fops_sram_dump = { + .open = ath11k_open_sram_dump, + .read = ath11k_read_sram_dump, + .release = ath11k_release_sram_dump, + .owner = THIS_MODULE, + .llseek = default_llseek, +}; + int ath11k_debugfs_pdev_create(struct ath11k_base *ab) { if (test_bit(ATH11K_FLAG_REGISTERED, &ab->dev_flags)) @@ -997,6 +1055,10 @@ int ath11k_debugfs_pdev_create(struct ath11k_base *ab) debugfs_create_file("soc_dp_stats", 0600, ab->debugfs_soc, ab, &fops_soc_dp_stats); + if (ab->hw_params.sram_dump) + debugfs_create_file("sram", 0400, ab->debugfs_soc, ab, + &fops_sram_dump); + return 0; } diff --git a/drivers/net/wireless/ath/ath11k/hif.h b/drivers/net/wireless/ath/ath11k/hif.h index e9366f786fbb..8fcf7500e5c6 100644 --- a/drivers/net/wireless/ath/ath11k/hif.h +++ b/drivers/net/wireless/ath/ath11k/hif.h @@ -29,6 +29,7 @@ struct ath11k_hif_ops { void (*ce_irq_enable)(struct ath11k_base *ab); void (*ce_irq_disable)(struct ath11k_base *ab); void (*get_ce_msi_idx)(struct ath11k_base *ab, u32 ce_id, u32 *msi_idx); + int (*dump_sram)(struct ath11k_base *ab, u8 *buf, u32 start, u32 end); }; static inline void ath11k_hif_ce_irq_enable(struct ath11k_base *ab) @@ -134,4 +135,13 @@ static inline void ath11k_get_ce_msi_idx(struct ath11k_base *ab, u32 ce_id, else *msi_data_idx = ce_id; } + +static inline int ath11k_hif_dump_sram(struct ath11k_base *ab, u8 *buf, + u32 start, u32 end) +{ + if (!ab->hif.ops->dump_sram) + return -EOPNOTSUPP; + + return ab->hif.ops->dump_sram(ab, buf, start, end); +} #endif /* _HIF_H_ */ diff --git a/drivers/net/wireless/ath/ath11k/hw.c b/drivers/net/wireless/ath/ath11k/hw.c index 96db85c55585..ff30ba852200 100644 --- a/drivers/net/wireless/ath/ath11k/hw.c +++ b/drivers/net/wireless/ath/ath11k/hw.c @@ -2359,3 +2359,13 @@ const struct cfg80211_sar_capa ath11k_hw_sar_capa_wcn6855 = { .num_freq_ranges = (ARRAY_SIZE(ath11k_hw_sar_freq_ranges_wcn6855)), .freq_ranges = ath11k_hw_sar_freq_ranges_wcn6855, }; + +const struct ath11k_hw_sram_dump sram_dump_qca6390 = { + .start = 0x01400000, + .end = 0x0171ffff, +}; + +const struct ath11k_hw_sram_dump sram_dump_wcn6855 = { + .start = 0x01400000, + .end = 0x0177ffff, +}; diff --git a/drivers/net/wireless/ath/ath11k/hw.h b/drivers/net/wireless/ath/ath11k/hw.h index bb5ac940e470..2c3988e03aae 100644 --- a/drivers/net/wireless/ath/ath11k/hw.h +++ b/drivers/net/wireless/ath/ath11k/hw.h @@ -126,6 +126,11 @@ struct ath11k_hw_hal_params { enum hal_rx_buf_return_buf_manager rx_buf_rbm; }; +struct ath11k_hw_sram_dump { + u32 start; + u32 end; +}; + struct ath11k_hw_params { const char *name; u16 hw_rev; @@ -200,6 +205,7 @@ struct ath11k_hw_params { bool hybrid_bus_type; bool fixed_fw_mem; bool support_off_channel_tx; + const struct ath11k_hw_sram_dump *sram_dump; }; struct ath11k_hw_ops { @@ -397,4 +403,7 @@ static inline const char *ath11k_bd_ie_type_str(enum ath11k_bd_ie_type type) } extern const struct cfg80211_sar_capa ath11k_hw_sar_capa_wcn6855; + +extern const struct ath11k_hw_sram_dump sram_dump_qca6390; +extern const struct ath11k_hw_sram_dump sram_dump_wcn6855; #endif diff --git a/drivers/net/wireless/ath/ath11k/pci.c b/drivers/net/wireless/ath/ath11k/pci.c index 5bd34a6273d9..f853bf4a12c7 100644 --- a/drivers/net/wireless/ath/ath11k/pci.c +++ b/drivers/net/wireless/ath/ath11k/pci.c @@ -697,6 +697,7 @@ static const struct ath11k_hif_ops ath11k_pci_hif_ops = { .ce_irq_enable = ath11k_pci_hif_ce_irq_enable, .ce_irq_disable = ath11k_pci_hif_ce_irq_disable, .get_ce_msi_idx = ath11k_pcic_get_ce_msi_idx, + .dump_sram = ath11k_pcic_dump_sram, }; static void ath11k_pci_read_hw_version(struct ath11k_base *ab, u32 *major, u32 *minor) diff --git a/drivers/net/wireless/ath/ath11k/pcic.c b/drivers/net/wireless/ath/ath11k/pcic.c index 15ca069e501f..c9027eafe65b 100644 --- a/drivers/net/wireless/ath/ath11k/pcic.c +++ b/drivers/net/wireless/ath/ath11k/pcic.c @@ -203,6 +203,35 @@ u32 ath11k_pcic_read32(struct ath11k_base *ab, u32 offset) } EXPORT_SYMBOL(ath11k_pcic_read32); +int ath11k_pcic_dump_sram(struct ath11k_base *ab, u8 *buf, + u32 start, u32 end) +{ + int ret = 0; + bool wakeup_required; + u32 *data = (u32 *)buf; + u32 i; + + /* for offset beyond BAR + 4K - 32, may + * need to wakeup the device to access. + */ + wakeup_required = test_bit(ATH11K_FLAG_DEVICE_INIT_DONE, &ab->dev_flags) && + end >= ATH11K_PCI_ACCESS_ALWAYS_OFF; + if (wakeup_required && ab->pci.ops->wakeup) { + ret = ab->pci.ops->wakeup(ab); + if (ret) + ath11k_warn(ab, "%s: failed to do wakeup: %d\n", __func__, ret); + } + + for (i = start; i < end + 1; i += 4) + *data++ = ath11k_pcic_do_read32(ab, i); + + if (wakeup_required && !ret && ab->pci.ops->release) + ab->pci.ops->release(ab); + + return 0; +} +EXPORT_SYMBOL(ath11k_pcic_dump_sram); + void ath11k_pcic_get_msi_address(struct ath11k_base *ab, u32 *msi_addr_lo, u32 *msi_addr_hi) { diff --git a/drivers/net/wireless/ath/ath11k/pcic.h b/drivers/net/wireless/ath/ath11k/pcic.h index 0afbb34510db..40353246ab0b 100644 --- a/drivers/net/wireless/ath/ath11k/pcic.h +++ b/drivers/net/wireless/ath/ath11k/pcic.h @@ -45,4 +45,5 @@ void ath11k_pcic_ce_irq_disable_sync(struct ath11k_base *ab); int ath11k_pcic_init_msi_config(struct ath11k_base *ab); int ath11k_pcic_register_pci_ops(struct ath11k_base *ab, const struct ath11k_pci_ops *pci_ops); +int ath11k_pcic_dump_sram(struct ath11k_base *ab, u8 *buf, u32 start, u32 end); #endif
Currently this feature is enabled for QCA6390/WCN6855. Tested-on: QCA6390 hw2.0 PCI WLAN.HST.1.0.1-01740-QCAHSTSWPLZ_V2_TO_X86-1 Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-01720.1-QCAHSPSWPL_V1_V2_SILICONZ_LITE-1 Signed-off-by: Baochen Qiang <quic_bqiang@quicinc.com> --- v2: 1: rebased on latest ath.git drivers/net/wireless/ath/ath11k/core.c | 7 +++ drivers/net/wireless/ath/ath11k/debugfs.c | 62 +++++++++++++++++++++++ drivers/net/wireless/ath/ath11k/hif.h | 10 ++++ drivers/net/wireless/ath/ath11k/hw.c | 10 ++++ drivers/net/wireless/ath/ath11k/hw.h | 9 ++++ drivers/net/wireless/ath/ath11k/pci.c | 1 + drivers/net/wireless/ath/ath11k/pcic.c | 29 +++++++++++ drivers/net/wireless/ath/ath11k/pcic.h | 1 + 8 files changed, 129 insertions(+)