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openwrt/target/linux/bcm27xx/patches-6.6/950-1146-drivers-dwc_otg-use-C11-style-variable-array-declara.patch
Álvaro Fernández Rojas 0171157d45 bcm27xx: update to latest RPi patches 
The patches were generated from the RPi repo with the following command:
git format-patch v6.6.44..rpi-6.6.y

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2024-08-06 18:38:00 +02:00

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From 65fddc7301f52470fd846acede96d240a1902e67 Mon Sep 17 00:00:00 2001
From: Jonathan Bell <jonathan@raspberrypi.com>
Date: Fri, 5 Jul 2024 14:00:38 +0100
Subject: [PATCH 1146/1215] drivers: dwc_otg: use C11 style variable array
declarations
The kernel C standard changed in 5.18.
Remove a layer of indirection around the FIQ bounce buffers, be consistent
with pointers to FIQ bounce buffers, and remove open-coded 32-bit clamping
of DMA addresses.
Also remove a pointless fiq_state initialisation loop.
Signed-off-by: Jonathan Bell <jonathan@raspberrypi.com>
---
drivers/usb/host/dwc_otg/dwc_otg_fiq_fsm.c | 12 ++++----
drivers/usb/host/dwc_otg/dwc_otg_fiq_fsm.h | 8 ++---
drivers/usb/host/dwc_otg/dwc_otg_hcd.c | 34 ++++++++++-----------
drivers/usb/host/dwc_otg/dwc_otg_hcd.h | 4 +--
drivers/usb/host/dwc_otg/dwc_otg_hcd_intr.c | 4 +--
5 files changed, 28 insertions(+), 34 deletions(-)
--- a/drivers/usb/host/dwc_otg/dwc_otg_fiq_fsm.c
+++ b/drivers/usb/host/dwc_otg/dwc_otg_fiq_fsm.c
@@ -240,8 +240,8 @@ static int notrace fiq_increment_dma_buf
hcdma_data_t hcdma;
int i = st->channel[n].dma_info.index;
int len;
- struct fiq_dma_blob *blob =
- (struct fiq_dma_blob *)(uintptr_t)st->dma_base;
+ struct fiq_dma_channel *split_dma =
+ (struct fiq_dma_channel *)(uintptr_t)st->dma_base;
len = fiq_get_xfer_len(st, n);
fiq_print(FIQDBG_INT, st, "LEN: %03d", len);
@@ -250,7 +250,7 @@ static int notrace fiq_increment_dma_buf
if (i > 6)
BUG();
- hcdma.d32 = (u32)(uintptr_t)&blob->channel[n].index[i].buf[0];
+ hcdma.d32 = lower_32_bits((uintptr_t)&split_dma[n].index[i].buf[0]);
FIQ_WRITE(st->dwc_regs_base + HC_START + (HC_OFFSET * n) + HC_DMA, hcdma.d32);
st->channel[n].dma_info.index = i;
return 0;
@@ -290,8 +290,8 @@ static int notrace fiq_iso_out_advance(s
hcsplt_data_t hcsplt;
hctsiz_data_t hctsiz;
hcdma_data_t hcdma;
- struct fiq_dma_blob *blob =
- (struct fiq_dma_blob *)(uintptr_t)st->dma_base;
+ struct fiq_dma_channel *split_dma =
+ (struct fiq_dma_channel *)(uintptr_t)st->dma_base;
int last = 0;
int i = st->channel[n].dma_info.index;
@@ -303,7 +303,7 @@ static int notrace fiq_iso_out_advance(s
last = 1;
/* New DMA address - address of bounce buffer referred to in index */
- hcdma.d32 = (u32)(uintptr_t)blob->channel[n].index[i].buf;
+ hcdma.d32 = lower_32_bits((uintptr_t)&split_dma[n].index[i].buf[0]);
//hcdma.d32 = FIQ_READ(st->dwc_regs_base + HC_START + (HC_OFFSET * n) + HC_DMA);
//hcdma.d32 += st->channel[n].dma_info.slot_len[i];
fiq_print(FIQDBG_INT, st, "LAST: %01d ", last);
--- a/drivers/usb/host/dwc_otg/dwc_otg_fiq_fsm.h
+++ b/drivers/usb/host/dwc_otg/dwc_otg_fiq_fsm.h
@@ -263,10 +263,6 @@ struct fiq_dma_channel {
struct fiq_split_dma_slot index[6];
} __attribute__((packed));
-struct fiq_dma_blob {
- struct fiq_dma_channel channel[0];
-} __attribute__((packed));
-
/**
* struct fiq_hs_isoc_info - USB2.0 isochronous data
* @iso_frame: Pointer to the array of OTG URB iso_frame_descs.
@@ -352,7 +348,7 @@ struct fiq_state {
mphi_regs_t mphi_regs;
void *dwc_regs_base;
dma_addr_t dma_base;
- struct fiq_dma_blob *fiq_dmab;
+ struct fiq_dma_channel *fiq_dmab;
void *dummy_send;
dma_addr_t dummy_send_dma;
gintmsk_data_t gintmsk_saved;
@@ -365,7 +361,7 @@ struct fiq_state {
char * buffer;
unsigned int bufsiz;
#endif
- struct fiq_channel_state channel[0];
+ struct fiq_channel_state channel[];
};
#ifdef CONFIG_ARM64
--- a/drivers/usb/host/dwc_otg/dwc_otg_hcd.c
+++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd.c
@@ -58,6 +58,7 @@ static int last_sel_trans_num_avail_hc_a
static int last_sel_trans_num_avail_hc_at_end = 0;
#endif /* DEBUG_HOST_CHANNELS */
+static_assert(FIQ_PASSTHROUGH == 0);
dwc_otg_hcd_t *dwc_otg_hcd_alloc_hcd(void)
{
@@ -876,7 +877,7 @@ void dwc_otg_hcd_power_up(void *ptr)
void dwc_otg_cleanup_fiq_channel(dwc_otg_hcd_t *hcd, uint32_t num)
{
struct fiq_channel_state *st = &hcd->fiq_state->channel[num];
- struct fiq_dma_blob *blob = hcd->fiq_dmab;
+ struct fiq_dma_channel *split_dma = hcd->fiq_dmab;
int i;
st->fsm = FIQ_PASSTHROUGH;
@@ -898,7 +899,7 @@ void dwc_otg_cleanup_fiq_channel(dwc_otg
st->hs_isoc_info.iso_desc = NULL;
st->hs_isoc_info.nrframes = 0;
- DWC_MEMSET(&blob->channel[num].index[0], 0x6b, 1128);
+ DWC_MEMSET(&split_dma[num].index[0], 0x6b, 1128);
}
/**
@@ -1045,9 +1046,6 @@ int dwc_otg_hcd_init(dwc_otg_hcd_t * hcd
spin_lock_init(&hcd->fiq_state->lock);
#endif
- for (i = 0; i < num_channels; i++) {
- hcd->fiq_state->channel[i].fsm = FIQ_PASSTHROUGH;
- }
hcd->fiq_state->dummy_send = DWC_DMA_ALLOC_ATOMIC(dev, 16,
&hcd->fiq_state->dummy_send_dma);
@@ -1561,7 +1559,7 @@ int fiq_fsm_setup_periodic_dma(dwc_otg_h
int frame_length, i = 0;
uint8_t *ptr = NULL;
dwc_hc_t *hc = qh->channel;
- struct fiq_dma_blob *blob;
+ struct fiq_dma_channel *split_dma;
struct dwc_otg_hcd_iso_packet_desc *frame_desc;
for (i = 0; i < 6; i++) {
@@ -1576,10 +1574,10 @@ int fiq_fsm_setup_periodic_dma(dwc_otg_h
* Pointer arithmetic on hcd->fiq_state->dma_base (a dma_addr_t)
* to point it to the correct offset in the allocated buffers.
*/
- blob = (struct fiq_dma_blob *)
+ split_dma = (struct fiq_dma_channel *)
(uintptr_t)hcd->fiq_state->dma_base;
- st->hcdma_copy.d32 =(u32)(uintptr_t)
- blob->channel[hc->hc_num].index[0].buf;
+ st->hcdma_copy.d32 = lower_32_bits((uintptr_t)
+ &split_dma[hc->hc_num].index[0].buf[0]);
/* Calculate the max number of CSPLITS such that the FIQ can time out
* a transaction if it fails.
@@ -1600,7 +1598,7 @@ int fiq_fsm_setup_periodic_dma(dwc_otg_h
frame_length = frame_desc->length;
/* Virtual address for bounce buffers */
- blob = hcd->fiq_dmab;
+ split_dma = hcd->fiq_dmab;
ptr = qtd->urb->buf + frame_desc->offset;
if (frame_length == 0) {
@@ -1613,11 +1611,11 @@ int fiq_fsm_setup_periodic_dma(dwc_otg_h
} else {
do {
if (frame_length <= 188) {
- dwc_memcpy(&blob->channel[hc->hc_num].index[i].buf[0], ptr, frame_length);
+ dwc_memcpy(&split_dma[hc->hc_num].index[i].buf[0], ptr, frame_length);
st->dma_info.slot_len[i] = frame_length;
ptr += frame_length;
} else {
- dwc_memcpy(&blob->channel[hc->hc_num].index[i].buf[0], ptr, 188);
+ dwc_memcpy(&split_dma[hc->hc_num].index[i].buf[0], ptr, 188);
st->dma_info.slot_len[i] = 188;
ptr += 188;
}
@@ -1634,10 +1632,10 @@ int fiq_fsm_setup_periodic_dma(dwc_otg_h
* dma_addr_t) to point it to the correct offset in the
* allocated buffers.
*/
- blob = (struct fiq_dma_blob *)
+ split_dma = (struct fiq_dma_channel *)
(uintptr_t)hcd->fiq_state->dma_base;
- st->hcdma_copy.d32 = (u32)(uintptr_t)
- blob->channel[hc->hc_num].index[0].buf;
+ st->hcdma_copy.d32 = lower_32_bits((uintptr_t)
+ &split_dma[hc->hc_num].index[0].buf[0]);
/* fixup xfersize to the actual packet size */
st->hctsiz_copy.b.pid = 0;
@@ -1917,14 +1915,14 @@ int fiq_fsm_queue_split_transaction(dwc_
if (hc->align_buff) {
st->hcdma_copy.d32 = hc->align_buff;
} else {
- st->hcdma_copy.d32 = ((unsigned long) hc->xfer_buff & 0xFFFFFFFF);
+ st->hcdma_copy.d32 = lower_32_bits((uintptr_t)hc->xfer_buff);
}
}
} else {
if (hc->align_buff) {
st->hcdma_copy.d32 = hc->align_buff;
} else {
- st->hcdma_copy.d32 = ((unsigned long) hc->xfer_buff & 0xFFFFFFFF);
+ st->hcdma_copy.d32 = lower_32_bits((uintptr_t)hc->xfer_buff);
}
}
/* The FIQ depends upon no other interrupts being enabled except channel halt.
@@ -1944,7 +1942,7 @@ int fiq_fsm_queue_split_transaction(dwc_
if (hc->align_buff) {
st->hcdma_copy.d32 = hc->align_buff;
} else {
- st->hcdma_copy.d32 = ((unsigned long) hc->xfer_buff & 0xFFFFFFFF);
+ st->hcdma_copy.d32 = lower_32_bits((uintptr_t)hc->xfer_buff);
}
}
DWC_WRITE_REG32(&hc_regs->hcdma, st->hcdma_copy.d32);
--- a/drivers/usb/host/dwc_otg/dwc_otg_hcd.h
+++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd.h
@@ -88,7 +88,7 @@ struct dwc_otg_hcd_urb {
uint32_t flags;
uint16_t interval;
struct dwc_otg_hcd_pipe_info pipe_info;
- struct dwc_otg_hcd_iso_packet_desc iso_descs[0];
+ struct dwc_otg_hcd_iso_packet_desc iso_descs[];
};
static inline uint8_t dwc_otg_hcd_get_ep_num(struct dwc_otg_hcd_pipe_info *pipe)
@@ -592,7 +592,7 @@ struct dwc_otg_hcd {
struct fiq_state *fiq_state;
/** Virtual address for split transaction DMA bounce buffers */
- struct fiq_dma_blob *fiq_dmab;
+ struct fiq_dma_channel *fiq_dmab;
#ifdef DEBUG
uint32_t frrem_samples;
--- a/drivers/usb/host/dwc_otg/dwc_otg_hcd_intr.c
+++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd_intr.c
@@ -2332,7 +2332,7 @@ void dwc_otg_fiq_unmangle_isoc(dwc_otg_h
int dwc_otg_fiq_unsetup_per_dma(dwc_otg_hcd_t *hcd, dwc_otg_qh_t *qh, dwc_otg_qtd_t *qtd, uint32_t num)
{
dwc_hc_t *hc = qh->channel;
- struct fiq_dma_blob *blob = hcd->fiq_dmab;
+ struct fiq_dma_channel *split_dma = hcd->fiq_dmab;
struct fiq_channel_state *st = &hcd->fiq_state->channel[num];
uint8_t *ptr = NULL;
int index = 0, len = 0;
@@ -2352,7 +2352,7 @@ int dwc_otg_fiq_unsetup_per_dma(dwc_otg_
for (i = 0; i < st->dma_info.index; i++) {
len += st->dma_info.slot_len[i];
- dwc_memcpy(ptr, &blob->channel[num].index[i].buf[0], st->dma_info.slot_len[i]);
+ dwc_memcpy(ptr, &split_dma[num].index[i].buf[0], st->dma_info.slot_len[i]);
ptr += st->dma_info.slot_len[i];
}
return len;
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