linux-kernel - Re: [PATCH v13 11/21] PCI: microchip: Add num_events field to struct plda_pcie

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Date: Fri, 29 Dec 2023 11:46:10 +0800
From: Minda Chen <minda.chen@...rfivetech.com>
To: Lorenzo Pieralisi <lpieralisi@...nel.org>
CC: Conor Dooley <conor@...nel.org>, Krzysztof Wilczyński
	<kw@...ux.com>, Rob Herring <robh+dt@...nel.org>, Bjorn Helgaas
	<bhelgaas@...gle.com>, Daire McNamara <daire.mcnamara@...rochip.com>, "Emil
 Renner Berthing" <emil.renner.berthing@...onical.com>, Krzysztof Kozlowski
	<krzysztof.kozlowski+dt@...aro.org>, <devicetree@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <linux-riscv@...ts.infradead.org>,
	<linux-pci@...r.kernel.org>, Paul Walmsley <paul.walmsley@...ive.com>,
	"Palmer Dabbelt" <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>,
	"Philipp Zabel" <p.zabel@...gutronix.de>, Mason Huo
	<mason.huo@...rfivetech.com>, Leyfoon Tan <leyfoon.tan@...rfivetech.com>,
	Kevin Xie <kevin.xie@...rfivetech.com>
Subject: Re: [PATCH v13 11/21] PCI: microchip: Add num_events field to struct
 plda_pcie_rp



On 2023/12/27 23:55, Lorenzo Pieralisi wrote:
> On Thu, Dec 14, 2023 at 03:28:29PM +0800, Minda Chen wrote:
>> The event num is different in other platform. For re-using interrupt
>> process codes, replace macros with variable.
> 
> "The number of events is different across platforms. In order to
> share interrupt processing code, add a variable that defines the
> number of events so that it can be set per-platform instead of
> hardcoding it".
> 
> Lorenzo
> 
Thanks for reviewing. Happy new year!

All the maintainers:
 Happy new year!

>> 
>> Signed-off-by: Minda Chen <minda.chen@...rfivetech.com>
>> Reviewed-by: Conor Dooley <conor.dooley@...rochip.com>
>> ---
>>  drivers/pci/controller/plda/pcie-microchip-host.c | 8 +++++---
>>  drivers/pci/controller/plda/pcie-plda.h           | 1 +
>>  2 files changed, 6 insertions(+), 3 deletions(-)
>> 
>> diff --git a/drivers/pci/controller/plda/pcie-microchip-host.c b/drivers/pci/controller/plda/pcie-microchip-host.c
>> index 506e6eeadc76..7b3f4f74745d 100644
>> --- a/drivers/pci/controller/plda/pcie-microchip-host.c
>> +++ b/drivers/pci/controller/plda/pcie-microchip-host.c
>> @@ -654,7 +654,7 @@ static void plda_handle_event(struct irq_desc *desc)
>>  
>>  	events = mc_get_events(port);
>>  
>> -	for_each_set_bit(bit, &events, NUM_EVENTS)
>> +	for_each_set_bit(bit, &events, port->num_events)
>>  		generic_handle_domain_irq(port->event_domain, bit);
>>  
>>  	chained_irq_exit(chip, desc);
>> @@ -817,7 +817,8 @@ static int plda_pcie_init_irq_domains(struct plda_pcie_rp *port)
>>  		return -EINVAL;
>>  	}
>>  
>> -	port->event_domain = irq_domain_add_linear(pcie_intc_node, NUM_EVENTS,
>> +	port->event_domain = irq_domain_add_linear(pcie_intc_node,
>> +						   port->num_events,
>>  						   &plda_event_domain_ops,
>>  						   port);
>>  	if (!port->event_domain) {
>> @@ -921,7 +922,7 @@ static int plda_init_interrupts(struct platform_device *pdev, struct plda_pcie_r
>>  	if (irq < 0)
>>  		return -ENODEV;
>>  
>> -	for (i = 0; i < NUM_EVENTS; i++) {
>> +	for (i = 0; i < port->num_events; i++) {
>>  		event_irq = irq_create_mapping(port->event_domain, i);
>>  		if (!event_irq) {
>>  			dev_err(dev, "failed to map hwirq %d\n", i);
>> @@ -1013,6 +1014,7 @@ static int mc_host_probe(struct platform_device *pdev)
>>  
>>  	bridge_base_addr = port->axi_base_addr + MC_PCIE_BRIDGE_ADDR;
>>  	plda->bridge_addr = bridge_base_addr;
>> +	plda->num_events = NUM_EVENTS;
>>  
>>  	/* Allow enabling MSI by disabling MSI-X */
>>  	val = readl(bridge_base_addr + PCIE_PCI_IRQ_DW0);
>> diff --git a/drivers/pci/controller/plda/pcie-plda.h b/drivers/pci/controller/plda/pcie-plda.h
>> index 3deefd35fa5a..e3d35cef9894 100644
>> --- a/drivers/pci/controller/plda/pcie-plda.h
>> +++ b/drivers/pci/controller/plda/pcie-plda.h
>> @@ -118,6 +118,7 @@ struct plda_pcie_rp {
>>  	raw_spinlock_t lock;
>>  	struct plda_msi msi;
>>  	void __iomem *bridge_addr;
>> +	int num_events;
>>  };
>>  
>>  void plda_pcie_setup_window(void __iomem *bridge_base_addr, u32 index,
>> -- 
>> 2.17.1
>>