From 9a874d045473f199e1a184a68be1cf4970db6cbf Mon Sep 17 00:00:00 2001 From: Dedy Lansky Date: Fri, 26 Apr 2019 18:43:33 +0300 Subject: [PATCH] wil6210: enhancements for descriptor and status ring debugfs Add printing of hwhead as part of desc ring and status ring debugfs. Validate wil->rx_buff_mgmt and ring->ctx arrays before accessing them. Dump Tx descriptor content even when it indicates invalid buff_id. Signed-off-by: Dedy Lansky Signed-off-by: Maya Erez Signed-off-by: Kalle Valo --- drivers/net/wireless/ath/wil6210/debugfs.c | 52 +++++++++++++++++----- drivers/net/wireless/ath/wil6210/wil6210.h | 5 +++ 2 files changed, 45 insertions(+), 12 deletions(-) diff --git a/drivers/net/wireless/ath/wil6210/debugfs.c b/drivers/net/wireless/ath/wil6210/debugfs.c index df2adff6c33a..42507f530a40 100644 --- a/drivers/net/wireless/ath/wil6210/debugfs.c +++ b/drivers/net/wireless/ath/wil6210/debugfs.c @@ -63,7 +63,9 @@ static void wil_print_desc_edma(struct seq_file *s, struct wil6210_priv *wil, &ring->va[idx].rx.enhanced; u16 buff_id = le16_to_cpu(rx_d->mac.buff_id); - has_skb = wil->rx_buff_mgmt.buff_arr[buff_id].skb; + if (wil->rx_buff_mgmt.buff_arr && + wil_val_in_range(buff_id, 0, wil->rx_buff_mgmt.size)) + has_skb = wil->rx_buff_mgmt.buff_arr[buff_id].skb; seq_printf(s, "%c", (has_skb) ? _h : _s); } else { struct wil_tx_enhanced_desc *d = @@ -71,9 +73,9 @@ static void wil_print_desc_edma(struct seq_file *s, struct wil6210_priv *wil, &ring->va[idx].tx.enhanced; num_of_descs = (u8)d->mac.d[2]; - has_skb = ring->ctx[idx].skb; + has_skb = ring->ctx && ring->ctx[idx].skb; if (num_of_descs >= 1) - seq_printf(s, "%c", ring->ctx[idx].skb ? _h : _s); + seq_printf(s, "%c", has_skb ? _h : _s); else /* num_of_descs == 0, it's a frag in a list of descs */ seq_printf(s, "%c", has_skb ? 'h' : _s); @@ -84,7 +86,7 @@ static void wil_print_ring(struct seq_file *s, struct wil6210_priv *wil, const char *name, struct wil_ring *ring, char _s, char _h) { - void __iomem *x = wmi_addr(wil, ring->hwtail); + void __iomem *x; u32 v; seq_printf(s, "RING %s = {\n", name); @@ -96,7 +98,21 @@ static void wil_print_ring(struct seq_file *s, struct wil6210_priv *wil, else seq_printf(s, " swtail = %d\n", ring->swtail); seq_printf(s, " swhead = %d\n", ring->swhead); + if (wil->use_enhanced_dma_hw) { + int ring_id = ring->is_rx ? + WIL_RX_DESC_RING_ID : ring - wil->ring_tx; + /* SUBQ_CONS is a table of 32 entries, one for each Q pair. + * lower 16bits are for even ring_id and upper 16bits are for + * odd ring_id + */ + x = wmi_addr(wil, RGF_DMA_SCM_SUBQ_CONS + 4 * (ring_id / 2)); + v = readl_relaxed(x); + + v = (ring_id % 2 ? (v >> 16) : (v & 0xffff)); + seq_printf(s, " hwhead = %u\n", v); + } seq_printf(s, " hwtail = [0x%08x] -> ", ring->hwtail); + x = wmi_addr(wil, ring->hwtail); if (x) { v = readl(x); seq_printf(s, "0x%08x = %d\n", v, v); @@ -188,7 +204,7 @@ DEFINE_SHOW_ATTRIBUTE(ring); static void wil_print_sring(struct seq_file *s, struct wil6210_priv *wil, struct wil_status_ring *sring) { - void __iomem *x = wmi_addr(wil, sring->hwtail); + void __iomem *x; int sring_idx = sring - wil->srings; u32 v; @@ -199,7 +215,19 @@ static void wil_print_sring(struct seq_file *s, struct wil6210_priv *wil, seq_printf(s, " size = %d\n", sring->size); seq_printf(s, " elem_size = %zu\n", sring->elem_size); seq_printf(s, " swhead = %d\n", sring->swhead); + if (wil->use_enhanced_dma_hw) { + /* COMPQ_PROD is a table of 32 entries, one for each Q pair. + * lower 16bits are for even ring_id and upper 16bits are for + * odd ring_id + */ + x = wmi_addr(wil, RGF_DMA_SCM_COMPQ_PROD + 4 * (sring_idx / 2)); + v = readl_relaxed(x); + + v = (sring_idx % 2 ? (v >> 16) : (v & 0xffff)); + seq_printf(s, " hwhead = %u\n", v); + } seq_printf(s, " hwtail = [0x%08x] -> ", sring->hwtail); + x = wmi_addr(wil, sring->hwtail); if (x) { v = readl_relaxed(x); seq_printf(s, "0x%08x = %d\n", v, v); @@ -1091,19 +1119,18 @@ static int txdesc_show(struct seq_file *s, void *data) if (wil->use_enhanced_dma_hw) { if (tx) { - skb = ring->ctx[txdesc_idx].skb; - } else { + skb = ring->ctx ? ring->ctx[txdesc_idx].skb : NULL; + } else if (wil->rx_buff_mgmt.buff_arr) { struct wil_rx_enhanced_desc *rx_d = (struct wil_rx_enhanced_desc *) &ring->va[txdesc_idx].rx.enhanced; u16 buff_id = le16_to_cpu(rx_d->mac.buff_id); if (!wil_val_in_range(buff_id, 0, - wil->rx_buff_mgmt.size)) { + wil->rx_buff_mgmt.size)) seq_printf(s, "invalid buff_id %d\n", buff_id); - return 0; - } - skb = wil->rx_buff_mgmt.buff_arr[buff_id].skb; + else + skb = wil->rx_buff_mgmt.buff_arr[buff_id].skb; } } else { skb = ring->ctx[txdesc_idx].skb; @@ -1136,7 +1163,7 @@ static int status_msg_show(struct seq_file *s, void *data) struct wil6210_priv *wil = s->private; int sring_idx = dbg_sring_index; struct wil_status_ring *sring; - bool tx = sring_idx == wil->tx_sring_idx ? 1 : 0; + bool tx; u32 status_msg_idx = dbg_status_msg_index; u32 *u; @@ -1146,6 +1173,7 @@ static int status_msg_show(struct seq_file *s, void *data) } sring = &wil->srings[sring_idx]; + tx = !sring->is_rx; if (!sring->va) { seq_printf(s, "No %cX status ring\n", tx ? 'T' : 'R'); diff --git a/drivers/net/wireless/ath/wil6210/wil6210.h b/drivers/net/wireless/ath/wil6210/wil6210.h index dc400026a3eb..1f0175d8399c 100644 --- a/drivers/net/wireless/ath/wil6210/wil6210.h +++ b/drivers/net/wireless/ath/wil6210/wil6210.h @@ -335,6 +335,11 @@ struct RGF_ICR { #define BIT_BOOT_FROM_ROM BIT(31) /* eDMA */ +#define RGF_SCM_PTRS_SUBQ_RD_PTR (0x8b4000) +#define RGF_SCM_PTRS_COMPQ_RD_PTR (0x8b4100) +#define RGF_DMA_SCM_SUBQ_CONS (0x8b60ec) +#define RGF_DMA_SCM_COMPQ_PROD (0x8b616c) + #define RGF_INT_COUNT_ON_SPECIAL_EVT (0x8b62d8) #define RGF_INT_CTRL_INT_GEN_CFG_0 (0x8bc000) -- 2.30.2